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Sample records for luna tabasco modelacion

  1. Mexico's Luna discoveries are more than moonshine

    SciTech Connect

    Stewart-Gordon, T.J.; Baker, G.T.

    1987-05-01

    Just when it seemed that Mexico's petroleum reserves may have been overstated, the state oil company opened a new province. Petroleos Mexicanos (Pemex) geologists think the Luna area of Tabasco State and the Gulf of Mexico could add the condensate and gas equivalent of 20 billion bbl of light oil to Mexico's proven reserves. If true, this would be the largest discovery in Mexico since the Campeche Sound fields in 1976. To date, the new province stretches about 50 miles between the Caribbean coastal towns of Frontera and Puerto Ceiba in Tabasco State, and extends some 31 miles offshore (see map). Since the early 1970s, Pemex geologists have postulated that the entire Yucatan platform will prove productive. Luna finds reduce the distance between Campeche fields and onshore production to 93 miles. The Luna area is ideally suited for rapid development - it is about 40 miles northeast of Villahermosa, Tabasco, and within 60 miles of the export terminal at Dos Bocas near the border between Tabasco and Vera Cruz states. It is also less than 50 miles from the Cactus gas-processing and petrochemical plants in Chiapas State, which means that gas can be put into the country's trunk line that extends to the U.S. grid at Reynosa.

  2. Luna 16

    NASA Image and Video Library

    2010-03-25

    Luna 16 was the first robotic mission to land on the Moon on basaltic plains of Mare Fecunditatis and return a sample to the Earth. It was launched by the Soviet Union on 12 September 1970. This image was taken by NASA Lunar Reconnaissance Orbiter.

  3. Lunae Planum

    NASA Technical Reports Server (NTRS)

    2002-01-01

    (Released 24 June 2002) The Science This image is within a region called Lunae Planum, near 27.3N, 75.3W. This is a region west of the Viking 1 landing site that marks the transition between the Tharsis rise, a giant volcanic complex, and the northern lowland plains. The topographically high regions display numerous graben, signs of significant amounts of crustal deformation. The low areas display signs of resurfacing, including an unusual unit that appears to 'lap' onto the base of the uplands. This scarp follows the transition between the high and low areas throughout much of the image. It is not clear what caused these deposits, but a likely candidate is ice, which is suspected to have played a major role in the surface morphology of the fretted terrains and many features within the northern lowlands. The Story Lunae Planum was named after the Roman moon goddess Luna, who in ancient stories ruled over the night just as her counterpart, the sun god Sol, ruled over the day (a 'sol' is, in fact, the word used for a Martian day). Wearing the symbol of the crescent moon upon her head, Luna was known to ride on chariot pulled by two powerful horses. If the fictional Luna ever rode over the Martian plain named for her, she would find the terrain fairly rough going. You might say that she'd face a large number of 'ruts' on a geologic scale. That's because Lunae Planum marks the transition between the high Tharsis rise , a giant volcanic bulge on Mars, and the northern lowland plains. In this region, there are many signs of significant crustal deformation. Look for the dropped blocks of terrain called 'graben' on the higher surfaces in this image. Graben are created when tectonic forces tear apart the terrain, leaving long, large 'ruts' on the surface. We find graben on Earth too (think of Death Valley, the lowest dry land in the United States, or of the Jordan Dead Sea depression). Much more exciting than these depressions is the thin ridge that seems to lap up against

  4. Lunae Planum

    NASA Technical Reports Server (NTRS)

    2002-01-01

    (Released 24 June 2002) The Science This image is within a region called Lunae Planum, near 27.3N, 75.3W. This is a region west of the Viking 1 landing site that marks the transition between the Tharsis rise, a giant volcanic complex, and the northern lowland plains. The topographically high regions display numerous graben, signs of significant amounts of crustal deformation. The low areas display signs of resurfacing, including an unusual unit that appears to 'lap' onto the base of the uplands. This scarp follows the transition between the high and low areas throughout much of the image. It is not clear what caused these deposits, but a likely candidate is ice, which is suspected to have played a major role in the surface morphology of the fretted terrains and many features within the northern lowlands. The Story Lunae Planum was named after the Roman moon goddess Luna, who in ancient stories ruled over the night just as her counterpart, the sun god Sol, ruled over the day (a 'sol' is, in fact, the word used for a Martian day). Wearing the symbol of the crescent moon upon her head, Luna was known to ride on chariot pulled by two powerful horses. If the fictional Luna ever rode over the Martian plain named for her, she would find the terrain fairly rough going. You might say that she'd face a large number of 'ruts' on a geologic scale. That's because Lunae Planum marks the transition between the high Tharsis rise , a giant volcanic bulge on Mars, and the northern lowland plains. In this region, there are many signs of significant crustal deformation. Look for the dropped blocks of terrain called 'graben' on the higher surfaces in this image. Graben are created when tectonic forces tear apart the terrain, leaving long, large 'ruts' on the surface. We find graben on Earth too (think of Death Valley, the lowest dry land in the United States, or of the Jordan Dead Sea depression). Much more exciting than these depressions is the thin ridge that seems to lap up against

  5. The halogens in Luna 16 and Luna 20 soils.

    NASA Technical Reports Server (NTRS)

    Reed, G. W., Jr.; Jovanovic, S.

    1973-01-01

    The halogens, uranium, and lithium contents found in Luna 16, Luna 20, and some Apollo lunar soil samples are discussed. Chlorine and phosphorus pentoxide do not appear to exhibit the same correlation in soils from the Luna 20 and possibly the Luna 16 sites as they do in samples from the Apollo 11-15 sites.

  6. The halogens in Luna 16 and Luna 20 soils.

    NASA Technical Reports Server (NTRS)

    Reed, G. W., Jr.; Jovanovic, S.

    1973-01-01

    The halogens, uranium, and lithium contents found in Luna 16, Luna 20, and some Apollo lunar soil samples are discussed. Chlorine and phosphorus pentoxide do not appear to exhibit the same correlation in soils from the Luna 20 and possibly the Luna 16 sites as they do in samples from the Apollo 11-15 sites.

  7. [Migration and oil in Tabasco].

    PubMed

    Lezama, J L

    1987-01-01

    "At the beginning of the seventies, important economic investments aimed at developing and commercializing the newly discovered oilwells were made in the state of Tabasco [Mexico]. As a result of this, the distribution and the social growth of the population in this state changed. This paper analyses the general characteristics of these changes, particularly those related to migration.... Generally speaking, the most important migratory movements which took place in this state during the oil boom were from one municipality to another and not from other states to Tabasco, as was thought at first.... This paper also describes the direction of the migratory flows and provides information about the sex of the migrants and about their insertion within the sphere of employment." (SUMMARY IN ENG) excerpt

  8. The Luna experiment

    NASA Astrophysics Data System (ADS)

    Broggini, Carlo

    2017-03-01

    One of the main ingredients of nuclear astrophysics is the cross section of the thermonuclear reactions which power the stars and synthesize the chemical elements in the Universe. Deep underground in the Gran Sasso Laboratory the cross section of the key reactions of the proton-proton chain and of the Carbon-Nitrogen-Oxygen (CNO) cycle have been measured right down to the energies of astrophysical interest. The main results obtained during the solar phase of LUNA are reviewed before describing the current LUNA program devoted to the study of the nucleosynthesis of the light elements in AGB stars and Classical Novae. Finally, the future of LUNA with the new 3.5 MV accelerator devoted to the study of helium and carbon burning is discussed.

  9. Luna 9 pictures: implications.

    PubMed

    Gold, T; Hapke, B W

    1966-07-15

    Evidence from Luna 9 does not preclude the possibility that the moon may have a surface made up largely of very fine rock particles. The degree to which they attach to each other and the resulting firmness of the ground cannot yet be closely estimated.

  10. The Luna 20 Regolith

    NASA Technical Reports Server (NTRS)

    Korotev, R. L.

    2002-01-01

    The Luna 20 regolith is more mafic, more magnesian, and richer in incompatible elements than typical feldspathic surface crust because it contains material of the lower crust ejected from the Crisium basin. Additional information is contained in the original extended abstract.

  11. Bovine fasciolosis in Tabasco, Mexico.

    PubMed

    Rangel-Ruiz, L J; Marquez-Izquierdo, R; Bravo-Nogueira, G

    1999-02-25

    To establish seasonal trends in infection and maturity of Fasciola hepatica in cattle in relation to macroclimatic factors, 2730 condemned livers were examined from March 1989 to February 1992. Livestock came from Jalapa, Tacotalpa and Teapa, all municipalities in Tabasco State. Flukes were collected monthly and separated into three different maturation stages. Mean numbers of flukes collected were determined. The analysis of the maturation stages detected in cattle showed: (a) F. hepatica matured throughout the year at all three sites; (b) the greatest mean fluke's burdens were found in Jalapa and the lowest in Teapa; large parasite populations were significantly higher from February to September than in July and/or August; (c) persistence of mature, gravid F. hepatica indicated that parasite eggs are shed throughout the year; (d) recruitment of F. hepatica occurred throughout the year with two major periods of infection, the first and main period during the dry season (from February to June), and a second minor infection period, during the rainy season (from August to October); (e) a close relationship was observed between the seasonal infection pattern in cattle and the seasonal infection pattern in snails, as well as fluctuations in the snail population according to rainfall and temperature variation.

  12. Sex Attractant Pheromone of the Luna Moth, Actias luna (Linnaeus).

    PubMed

    Millar, Jocelyn G; Haynes, Kenneth F; Dossey, Aaron T; McElfresh, J Steven; Allison, Jeremy D

    2016-09-01

    Giant silk moths (Lepidoptera: Saturniidae) typically are not well represented as larvae or adults in community level inventories of Lepidoptera, and as a result, little is known about their population dynamics. Furthermore, in recent years, many species of silk moths appear to have experienced population declines. Volatile sex pheromones are powerful sampling tools that can be used in operational conservation and monitoring programs for insects. Here, we describe the identification of the sex attractant pheromone of a giant silk moth, the luna moth Actias luna. Coupled gas chromatography-electroantennographic detection and gas chromatography-mass spectrometric analyses of extracts from pheromone glands of female luna moths supported the identification of (6E,11Z)-6,11-octadecadienal (E6,Z11-18:Ald), (6E)-6-octadecenal (E6-18:Ald), and (11Z)-11-octadecenal (Z11-18:Ald) as the compounds in extracts that elicited responses from antennae of male moths. These identifications were confirmed by synthesis, followed by testing of blends of the synthetic compounds in field trials in Ontario, Canada, and Kentucky, USA. Male moths were attracted to synthetic E6,Z11-18:Ald as a single component. Attraction appeared to be enhanced by addition of E6-18:Ald but not Z11-18:Ald, suggesting that the luna moth pheromone consists of a blend of E6,Z11-18:Ald and E6-18:Ald.

  13. THE GEOMORPHOLOGY OF BEACH RIDGES IN TABASCO, MEXICO.

    DTIC Science & Technology

    The largest coastal alluvial-plain in Mexico lies along the southern Gulf Coast, almost entirely within the state of Tabasco . This plain is...the Tabasco Plain is a narrow zone of coastal landforms comprised primarily of beach ridges plus a few groups of sand dunes. Systematic

  14. Science Program of Lunar Landers of "Luna-Glob" and "Luna-Resource" Missions

    NASA Astrophysics Data System (ADS)

    Mitrofanov, I. G.; Zelenyi, L. M.; Tret'yakov, V. I.; Dolgopolov, V. P.

    2011-03-01

    Program of scientific investigations is presented for two Russian polar landers: Luna Resource and Luna Glob. This program has to address two tasks: studies of composition of lunar polar regolith and studies of lunar exosphere at both poles.

  15. Luna 24 origins - Some trace element constraints

    NASA Technical Reports Server (NTRS)

    Jovanovic, S.; Jensen, K. J.; Reed, G. W., Jr.

    1978-01-01

    Luna 24 basaltic material originated in the particular volume of the lunar crust that produced Apollo 11 and Luna 16 basaltic material; it has the same Clr/P2O5 (r = residual) signature. Ru-Os contents (Barsukov et al., 1977) and a number of radiogenic age measurements place Luna 24 basalt origins stratigraphically in a layer between those from which Apollo 15 and Apollo 11 and 17 basalts were derived.

  16. Luna 24 origins - Some trace element constraints

    NASA Technical Reports Server (NTRS)

    Jovanovic, S.; Jensen, K. J.; Reed, G. W., Jr.

    1978-01-01

    Luna 24 basaltic material originated in the particular volume of the lunar crust that produced Apollo 11 and Luna 16 basaltic material; it has the same Clr/P2O5 (r = residual) signature. Ru-Os contents (Barsukov et al., 1977) and a number of radiogenic age measurements place Luna 24 basalt origins stratigraphically in a layer between those from which Apollo 15 and Apollo 11 and 17 basalts were derived.

  17. Petrogenesis of Luna 16 aluminous mare basalts

    NASA Technical Reports Server (NTRS)

    Ma, M.-S.; Schmitt, R. A.; Nielsen, R. L.; Taylor, G. J.; Warner, R. D.; Keil, K.

    1979-01-01

    Bulk compositions, petrology and mineralogy of Luna 16 aluminous mare basalt particles of less than 0.5 mm are described. The data rule out any close genetic relationships between Luna 16 and other major types of lunar mare basalts. Compared to high-Ti mare basalts, the Luna 16 basalts contain lower TiO2 and Ta and higher Al2O3 and REE abundances, suggesting that the Luna 16 source rocks crystallized later than (i.e. stratigraphically above) the ilmenite-bearing high-Ti basalt cumulate source rocks. The REE pattern for the Luna 16 basalts requires that the source material from which they were derived crystallized from a light REE enriched magma.

  18. Chemical composition of crystalline rock fragments from Luna 16 and Luna 20 fines

    NASA Technical Reports Server (NTRS)

    Cimbalnikova, A.; Palivcova, M.; Frana, J.; Mastalka, A.

    1977-01-01

    The chemical composition (bulk, rare earth, and trace elements) of the Luna 16 mare regolith and luna 20 highland regolith is discussed. The rock samples considered are 14 basaltic rock fragments (Luna 16) and 13 rock fragments of the ANT suite (Luna 20). On the basis of bulk composition, two types of basaltic rocks have been differentiated and defined in the Luna 16 regolith: mare basalts (fundamental crystalline rocks of Mare Fecunditatis) and high-alumina basalts. The bulk analyses of rock fragments of the ANT suite also enabled distinction of two rock types: anorthositic norites and troctolites and/or spinal-troctolites (the most abundant crystalline rocks of the highland region, the landing site of luna 20), and anorthosites. The chemical compositions of Luna 16 and Luna 20 regolith samples are compared. Differences in the chemistry of the Luna 16 mare regolith and that of mare basalts are discussed. The chemical affinity between the Luna 20 highland regolith and (a) anorthositic norites and (b) troctolites and/or spinel-troctolites has been ascertained.

  19. Melt inclusions in Luna 24 soil fragments

    NASA Technical Reports Server (NTRS)

    Roedder, W.; Weiblen, P. W.

    1978-01-01

    Optical examinations of 28 slides of Luna 24 soil fragments revealed melt inclusions in grains of olivine, plagioclase, spinel, and ilmenite as well as interstitial inclusions. In contrast with Apollo samples, the Luna 24 samples contain sulfide melt inclusions, which indicates that saturation with respect to an iron sulfide melt took place throughout much of the crystallization history, even while olivine was crystallizing. The Luna 24 silicate-melt inclusions have recorded a more extensive differentiation toward higher iron magmas than have the Apollo inclusions, but they have also recorded some inexplicably low aluminum values.

  20. Melt inclusions in Luna 24 soil fragments

    NASA Technical Reports Server (NTRS)

    Roedder, W.; Weiblen, P. W.

    1978-01-01

    Optical examinations of 28 slides of Luna 24 soil fragments revealed melt inclusions in grains of olivine, plagioclase, spinel, and ilmenite as well as interstitial inclusions. In contrast with Apollo samples, the Luna 24 samples contain sulfide melt inclusions, which indicates that saturation with respect to an iron sulfide melt took place throughout much of the crystallization history, even while olivine was crystallizing. The Luna 24 silicate-melt inclusions have recorded a more extensive differentiation toward higher iron magmas than have the Apollo inclusions, but they have also recorded some inexplicably low aluminum values.

  1. Alopecia in bats from Tabasco, Mexico.

    PubMed

    Bello-Gutiérrez, Joaquín; Suzán, Gerardo; Hidalgo-Mihart, Mircea G; Salas, Gerardo

    2010-07-01

    We report alopecic syndrome (hair loss in areas of the body, including chest, abdomen, and back) in four frugivorous bat species (Artibeus jamaicensis, Artibeus lituratus, Sturnira lilium, and Sturnira ludovici) within urban and periurban areas of Villahermosa, Tabasco, México, during 2007 and 2008. The overall prevalence of alopecic syndrome was 5.25% (135/2,567 bats). The highest prevalence was found in A. lituratus (5.6%; 62/1,105), followed by A. jamaicensis (5%; 3/1,462). We found a higher prevalence in the dry season, when more than 90% of the alopecic individuals (n=122) were captured. Higher prevalence of alopecia was recorded in urban areas (80% of captured alopecic bats, n=108) than in periurban areas (20%, n=27). Histopathologic studies revealed no evidence of infectious agents. The syndrome may be related to nutritional or endocrinal deficiencies. Spatial and seasonal aggregation in urban areas suggests that anthropogenic activities may interfere with nutritional processes. Further studies are needed to confirm the etiology of the syndrome as well as its impact on population dynamics. This is the first report of alopecic syndrome in sylvatic bats.

  2. Team LunaCY Outreach Paper

    NASA Technical Reports Server (NTRS)

    Heise, James; Hull, Bethanne J.

    2012-01-01

    Iowa State University's Lunabotics Club, Team LunaCY, has worked hard to generate enthusiasm for robotics, engineering, and lunar activities. Team LunaCY participated in a variety of different outreach events making a strong impression on Iowa youth. These events led the chair of the mechanical engineering department, Dr. Ted Heindel, to refer to the club's outreach program as "the model that all other engineering clubs should follow." Team LunaCY's outreach activities totaled over 200 hours and captivated over 3000 students and adults throughout the course of this acaden1ic year, reaching out to people all over Iowa and to several special guests. These guests included Vice-President Joe Biden, during a visit to Iowa State University in March 2012, and astronaut Clayton Anderson, during a visit to Iowa State's campus in the fall 2011. Team LunaCY's outreach events created hands on learning opportunities for local youth ranging in age from elementary school children to high school students. The team strove to make a positive impression on Iowa youth and to encourage interest and involvement in scientific fields. The full list of events is shown in Table 1. Three of the major outreach events the team participated in were the FIRST LEGO League, Science Bound, and iExplore STEM Festival.

  3. [The regional context of migration: the case of Tabasco].

    PubMed

    Lezama, J L

    1991-09-01

    This work contains reflections on regional influences in determination of migratory processes, as distinct from economic and political influences at the national level. The relationship between migration and region implies discussion of the concept of regions and regional hierarchies in relation to the national level. The economic structure of a region and its influence on migration for example is related to characteristics of the same phenomenon at the national level. Migration to Mexico City and Monterrey represents a process of social change that affects all of Mexican society, both because of the regional diversity and large volume of migrants to the 2 cities and because of their importance in Mexico's economic and social development. Migration at the regional level may be determined by forces within that region or by processes at the national or even international level that are beyond local control. The particular mix of resources available in a region and the level of its development compared to other places within the nation strongly affect migratory potential. The concrete case of petroleum activity in the state of Tabasco is an example of the lack of participation at the regional level in design of investment policy. The petroleum boom of the 1960s in Tabasco produced profound economic changes in the region and caused changes in the local power structure. Particularities in the case of Tabasco included a state economy dominated by petroleum activity, deterioration in the agricultural sector accompanied by increased livestock raising, expansion of zones of population expulsion especially where livestock were most dominant, and consolidation of strong migratory flows toward the petroleum zones. External factors in the regional socioeconomic situation included the impacts generated by petroleum activity, while internal factors included the increasing importance of livestock and eclipse of agriculture even before the petroleum boom. Census and survey data

  4. [Prevalence of malnutrition in preschool children in Tabasco, Mexico].

    PubMed

    Hernández-Martínez, E; Roldán-Fernández, S G

    1995-01-01

    Childhood malnutrition is an important and prevailing public health problem in Tabasco, Mexico, where precise information is still lacking. Tabasco Public Health Department has been working on this problem since 1991. The first nutritional survey was carried out to recognize the nutritional level of 935 randomly selected children between 1-4 years of age in 17 municipalities of the state. A proportion of 46% of childhood malnutrition level was found in this Mexican state (29.8 low, 12.8% moderate and 3.4% severe). Ninety percent of severe childhood malnutrition cases were located in the rural municipalities of Tacotalpa, Nacajuca, Jonuta, Macuspana and Centla. These municipalities were more affected, with a malnutrition prevalence of 63%, 62.2%, 60%, 59.5% and 59.4%, respectively. Results from these surveys identify high risk areas and may serve to advance specific proposals for nutrition interventions.

  5. "Luna-Glob" and "Luna-Resurs": science goals, payload and status

    NASA Astrophysics Data System (ADS)

    Mitrofanov, Igor; Dolgopolov, Vladimir; Khartov, Viktor; Lukjanchikov, Alexandr; Tret'yakov, Vlad; Zelenyi, Lev

    2014-05-01

    Vicinity of the South pole of the Moon is thought to be the most interesting region for future investigations. The first reason is associated with the studies of composition and content of volatiles in the lunar polar regolith: neutron mapping with high spatial resolution by LRO has shown that there are more local spots with strong signatures of water at south pole in comparison with the north one. Secondly, the center of Galaxy is not visible from the north pole, therefore southern location is more preferable for perspectives of future lunar exploration. The current Russian space program contains successive missions to study physical environment at the vicinity of the lunar south pole. The first one is the "Luna-Glob" mission, which spacecraft is named Luna-25 (next after the last Soviet lander Luna-24 of 1976). This project has to test the upgraded landing technology, to study the samples of lunar regoluth from the upper most layer of the subsurface and to measure the content of dust, neutrals and plasma during the cycle of the lunar local time. This mission is planned for launch in 2016 by Soyuz. The next lander is Luna-27 of the mission "Luna-Resurs" scheduled for launch in 2019 by Soyuz also. It will use the experience of the previous one to perform the comprehensive studies of the lunar polar environment. The landing site of this mission will be selected taking into account the perspective of further usage for future exploration. The lander will study in situ samples of regolith from the depth down to 2 meters. The mission "Luna-Resurs" will also include the lunar polar orbiter Luna-26 (launch in 2018 by Soyuz). These missions will be implemented with contributions of international partners. In particular, the cooperation with ESA is now under discussion for contribution of scientific instruments, high precision landing technology, drilling element, etc.

  6. Neutrinos and Nuclear Astrophysics at LUNA

    NASA Astrophysics Data System (ADS)

    Gustavino, Carlo; LUNA Collaboration

    2016-04-01

    Nuclear astrophysics plays an important role in understanding open issues of neutrino physics. As an example, the two key reactions of the solar p-p chain 3He(3He, 2p)4He and 3He(4He, γ)7Be have been studied at low energy with LUNA, providing an accurate experimental footing for the Standard Solar Model and consequently to study the neutrino mixing parameters. The LUNA collaboration is now studying the D(p, γ)3He reaction at Big Bang Nucleosynthesis (BBN) energies. The poor knowledge of this reaction is the main source of the uncertainty of the primordial abundance of deuterium in BBN calculations. In turn, the abundance of deuterium depends on the number of relativistic species existing in the early Universe, making the comparison between observed an calculated abundance of deuterium a powerful tool to constrain the existence of light sterile neutrinos or any other type of ;dark radiation;.

  7. Geologic mapping of northern Lunae Planun, Mars

    NASA Technical Reports Server (NTRS)

    Craddock, Robert A.; Maxwell, Ted A.

    1991-01-01

    Lunae Planum is an elevated region east of the Tharsis rise, and ridged plains containing numerous Sacra Dorsa wrinkle ridges, cross-cutting Sacra Fossae grabens, and lobate scarps compose this Martian Plateau. Geologic mapping of the northern Lunae Planum region was undertaken to better understand to emplacement history of the ridge plains, the structural history of deformation, and the periods of fluvial processes that have modified the region. These investigations are important for several reasons: (1) the history of plains emplacement yields information valuable for understanding the evolution of Tharsis volcanism; (2) interpretation of structural deformation has implications on the lithology of the Martian crust; and (3) determining the history and fate of Martian volatiles is dependent upon knowing the periods of outflow activity. A discussion of the findings is presented.

  8. Underground Nuclear Astrophysics - from LUNA to CASPAR

    NASA Astrophysics Data System (ADS)

    Strieder, Frank; Caspar Collaboration

    2015-04-01

    It is in the nature of astrophysics that many of the processes and objects are physically inaccessible. Thus, it is important that those aspects that can be studied in the laboratory are well understood. Nuclear reactions are such quantities that can be partly measured in the laboratory. These reactions influence the nucleosynthesis of the elements in the Big Bang as well as in all objects formed thereafter, and control the associated energy generation and evolution of stars. Since 20 years LUNA (Laboratory for Underground Nuclear Astrophysics) has been measuring cross sections relevant for hydrogen burning in the Gran Sasso Laboratory and demonstrated the research potential of an underground accelerator facility. Unfortunately, the number of reactions is limited by the energy range accessible with the 400 kV LUNA accelerator. The CASPAR (Compact Accelerator System for Performing Astrophysical Research) Collaboration will implement a high intensity 1 MV accelerator at the Sanford Underground Research Facility (SURF) and overcome the current limitation at LUNA. This project will primarily focus on the neutron sources for the so-called s-process, e.g. 13 C(α , n) 16 O and 22 Ne(α , n) 25 Mg , and lead to unprecedented measurements compared to previous studies.

  9. Seawater batteries for the Luna 27

    SciTech Connect

    1997-04-01

    On 20 January 1996, the first installation of seawater batteries (SWBs) on a live subsea well was successfully completed on the Luna 27 well in 591 ft of water in the Ionian Sea. The SWB pack is composed of six cells, each measuring 3.3 ft in diameter by 6.6 ft high, and is designed to provide all the electrical energy required by the autonomous control system for the well. The only operations required in the future will be periodic replacement of the anodes by use of a remotely operated vehicle (ROV) every 3 to 5 years. This application of the SWBs is a part of the continuing research by Agip SpA in the area of autonomous control that began with the subsea-wells autonomous-control system (SWACS) project. This project began in 1982 and culminated with the installation of a SWACS prototype in December 1987 on the Luna 27 gas well offshore Crotone and 2.5 miles form the Luna A platform. Notwithstanding the 5-year predicted life, the system was still operating in 1996 without any noticeable problems.

  10. Major element compositions of Luna 20 glass particles.

    NASA Technical Reports Server (NTRS)

    Glass, B. P.

    1973-01-01

    Major element analyses of nineteen Luna 20 glass particles indicate that most of the Luna 20 glasses have Al2O3 contents greater than 21 wt % and compositions similar to Apollo 16 and Luna 20 rocks and soils. Three of the glass particles have low Al2O3 (less than 13 wt %) and high FeO (greater than 18 wt %) contents and were probably derived from one of the adjacent maria. The low glass content of the Luna 20 soil indicates that it is relatively young or less mature than most mare soils that have been studied.

  11. Landing of the probes Luna 23 and Luna 24 remains an enigma

    NASA Astrophysics Data System (ADS)

    Kaydash, Vadym; Shkuratov, Yuriy; Videen, Gorden

    2013-12-01

    The landing sites of the landers of Apollo 11, 12, 14, 15, 16, and 17 as well as Luna 16, 20, and 23 spacecraft are all located within specific phase-ratio anomalies caused by the engine jets. The landing site identified as that of the Luna 24 spacecraft, however, was not located within its corresponding anomaly, leading Shkuratov et al. (2013) to suggest that this may be due to the misidentification of the Luna 23 and 24 spacecraft in the LROC images, since the Luna 23 landing was not successful. Dolgopolov et al. (2013) synthesized images of the Luna spacecraft as they might appear in the LROC images, using a model made by the Lavochkin Association. They found similarity of the spacecraft seen in the LROC images with the synthetic images corresponding to successful and unsuccessful missions and concluded that the original identification of the Luna 23 and 24 spacecraft in the images by Robinson et al. (2012) is likely correct. However, Dolgopolov et al. (2013) used only one illumination geometry for each landing site. As distinct from Dolgopolov et al. (2013) we make a similar analysis using a 3D computer spacecraft model using several different illuminations of the spacecraft and show that the orientations used by Dolgopolov are inconsistent with other LROC images, and it is impossible to make a reliable conclusion based on these analyses. We also show that geologic arguments presented by Dolgopolov et al. (2013) are ambiguous. Using Lucey et al.'s (1995) technique and multispectral images acquired with the Kaguya MI camera (resolution ~20 m), we show that small areas around the landing sites of the probes have almost the same contents of FeO and TiO2, as well as fairly close maturity degree of the regolith.

  12. Luna 24 regolith breccias: A possible source of the fine size material of the Luna 24 regolith

    NASA Technical Reports Server (NTRS)

    Rode, O. D.; Lindstrom, M. M.

    1994-01-01

    The regolith breccias from the Luna 24 core were analyzed. The Luna 24 regolith is a mixture of fine and coarse grain materials. The comparable analysis of the grain size distributions, the modal and chemical compositions of the breccias, and the regolith from the same levels show that the friable slightly litificated breccia with a friable fine grain matrix may be a source of fine grain material of the Luna 24 present day regolith.

  13. Lunar Infrared Spectrometer (LIS) for Luna-Resurs and Luna-Glob missions

    NASA Astrophysics Data System (ADS)

    Korablev, O.; Ivanov, A.; Mantsevich, S.; Kiselev, A.; Vyazovetskiy, N.; Fedorova, A.; Evdokimova, N.; Stepanov, A.; Titov, A.; Kalinnikov, Y.

    2012-09-01

    Lunar Infrared Spectrometer (LIS) is an experiment onboard Luna-Glob (launch in 2015) and Luna- Resurs (launch in 2017) Russian surface missions. The experiment is dedicated to the studies of mineralogy of the lunar regolith in the vicinity of the lander. The instrument is mounted on the mechanic arm of landing module in the field of view (45°) of stereo TV camera. LIS will provide measurements of selected surface region in the spectral range of 1.15-3.3 μm. The electrically commanded acousto-optic filter scans sequentially at a desired sampling, with random access, over the entire spectral range.

  14. The Impact of LUNA Results on Astroparticle Physics

    SciTech Connect

    Gustavino, Carlo

    2011-10-28

    LUNA (Laboratory for Underground Nuclear Astrophysics) is devoted to measure nuclear cross sections relevant in astroparticle physics. The facility operates underground, at the 'Laboratori Nazionali del Gran Sasso'(LNGS), where the cosmic ray induced background is very low. The LUNA measurements are important in neutrino physics, in the study of the Sun and other celestial bodies, in the Big Bang Nucleosynthesis.

  15. Emplacement of Fahrenheit crater ejecta at the Luna-24 site

    NASA Technical Reports Server (NTRS)

    Settle, M.; Cintala, M. J.; Head, J. W.

    1979-01-01

    The likelihood that the gabbroic and monomineralic fragments in the Luna-24 soils were excavated during the Fahrenheit cratering event can be assessed by considering the quantity, characteristics, and mode of deposition of Fahrenheit ejecta in the vicinity of the Luna-24 site. The original morphology of Fahrenheit's ejecta deposits is inferred by examining a fresh crater, Lichtenberg B, of a comparable site that formed in a similar type of target material. On the basis of this analogy, a probability of over 80% was calculated that the Luna-24 site was morphologically disturbed by the deposition of Fahrenheit ejecta. The relative abundance, gabbroic composition, and unshocked character of the holocrystalline fragments discovered in the Luna-24 core sample are consistent with the widespread occurrence of Fahrenheit deposits and the characteristics of Fahrenheit ejecta anticipated at the Luna-24 range.

  16. Lithic fragments, glasses and chondrules from Luna 16 fines.

    NASA Technical Reports Server (NTRS)

    Keil, K.; Prinz, M.; Green, J. A.; Kurat, G.

    1972-01-01

    Electron probe determination of the bulk compositions of igneous and microbreccia lithic fragments, glasses and chondrules from Luna 16 fines and of the compositions of minerals in basaltic lithic fragments. It is found that the Luna 16 fines have a composition more similar to that of Apollo 11 than to those of Apollo 12 and 14 materials. The compositions of lithic fragments, glasses and chondrules from Luna 16 core tube layers A and D are similar. The glasses are compositional analogs of the lithic fragments and are produced largely from igneous rocks. The Luna 16 chondrules have an anorthositic-noritic-troctolitic composition. Evidence for the presence of ferric iron and water-bearing minerals in the Luna 16 material is not obtained. The occurrence of a great variety of igneous rocks in the material confirms an earlier conclusion that large-scale melting or partial melting to a considerable depth and an extensive igneous differentiation must have occurred on the moon.

  17. Major element composition of Luna 20 glasses.

    NASA Technical Reports Server (NTRS)

    Warner, J.; Reid, A. M.; Ridley, W. I.; Brown, R. W.

    1972-01-01

    Ten per cent of the 50 to 150-micron size fraction of Luna 20 soil is glass. A random suite of 270 of these glasses has been analyzed by electron microprobe techniques. The major glass type forms a strong cluster around a mean value corresponding to Highland basalt (anorthositic gabbro) with 70% normative feldspar. Minor glass groups have the compositions of mare basalts and of low-K Fra Mauro type basalts. The glass data indicate that Highland basalt is the major rock type in the highlands north of Mare Fecunditatis.

  18. Un asteroide proveniente de la Luna

    NASA Astrophysics Data System (ADS)

    Tancredi, G.

    El descubrimiento de un débil objeto en movimiento por el telescopio Spacewatch (un instrumento dedicado a la búsqueda de Asteroides Cercanos a la Tierra) en 1991, ha generado una gran controversia en la comunidad planetaria. El objeto, denominado 1991 VG, tiene elementos orbitales llamativamente similares a los de la Tierra, lo que ha llevado a B. G. Marsden a aventurar:``El objeto podría ser una nave espacial en retorno (IAUC 5387)". Luego de analizar las características dinámicas de 1991 VG y las diferentes hipótesis sobre su origen, favorecemos la alternativa de que el objeto es un gran fragmento de material eyectado de la Luna durante un reciente impacto (en las últimas decenas de miles de años). El hallazgo en 1983 en la Antártida de meteoritos con composición tipo lunar, confirma la posibilidad de que material de la superficie del satélite puede ser eyectado a velocidades superiores a la de escape del sistema Tierra-Luna y alcance órbitas heliocéntricas. Los elementos orbitales de 1991 VG corresponden a los valores alcanzados por partículas que apenas escapan de la gravedad lunar y entran en órbitas heliocéntricas a través del punto Lagrangiano exterior del sistema Tierra-Sol.

  19. LUNA: Present status and future prospects

    NASA Astrophysics Data System (ADS)

    Caciolli, A.

    2016-05-01

    One of the main ingredients of nuclear astrophysics is the knowledge of the thermonuclear reactions responsible for powering the stellar engine and for the synthesis of the chemical elements. At astrophysical energies the cross section of nuclear processes is extremely reduced by the effect of the Coulomb barrier and often extrapolations are needed. The Laboratory for Underground Nuclear Astrophysics (LUNA) is placed under the Gran Sasso mountain. Thanks to the environmental background reduction provided by its position many reactions involved in hydrogen burning has been measured directly at astrophysical energies. Based on this progress, currently there are efforts in several countries to construct new underground accelerators. The exciting science that can be probed with these new facilities will be highlighted.

  20. Seasonal trends of Paramphistomum cervi in Tabasco, Mexico.

    PubMed

    Rangel-Ruiz, L J; Albores-Brahms, S T; Gamboa-Aguilar, J

    2003-10-20

    Thirty rumens were examined every month from May 1989 to April 1992 to establish seasonal trends of infection and their relationship to the climatic factors caused by Paramphistomum cervi in cattle. The cattle were chosen from three municipalities of the Sierra region in Tabasco: Jalapa, Tacotalpa and Teapa. P. cervi was found throughout the year with prevalence between 3.33 and 96.67%, and with a yearly average of 39.10%. The major period of infection was shown in Jalapa. However, the maximum mean intensity was found in Teapa. The prevalence of the infection in all three sites was similar, showing the regional trend of P. cervi infection. Cattle were infected mainly throughout the rainy and windy seasons, during summer, autumn and at the beginning of winter.

  1. Nutrition survey in Tabasco, Mexico: patterns of infant feeding.

    PubMed

    Dewey, K G

    1983-07-01

    Information on infant feeding was collected from 149 mothers of 744 children born over a period of 25 yr in an area of Tabasco, Mexico which has experienced rapid economic development. From 1953 to 1978, there was an increase in bottle-feeding, primarily as a supplement to breast-feeding, while the proportion of infants exclusively breast-fed declined from 69 to 48%. This trend was accompanied by a decrease in the average duration of lactation: the percentage of infants breast-fed 12 months or more declined from 73 to 45%. Mothers living within the area of an agricultural development project completed in 1973 were more likely to bottle-feed than mothers outside the project. The consequences of supplemental bottle-feeding for continued lactation, infant health, and child spacing require further investigation.

  2. New field exploration: greater rewards in Campeche-Chiapas-Tabasco

    SciTech Connect

    Not Available

    1981-11-01

    Mexico has overcome many real and fictional tales of hydrocarbon development. However, it is possible that this is only the beginning of something even bigger. If the new hydrocarbon production, based on the exploratory activity, is confirmed. Mexico has started the most ambitious exploratory activity since the oil discovery in Campeche in 1976, and in the west part of the zone. Wildcat wells are being drilled in search of more reserves and lighter hydrocarbons. The theory has emerged that the mesozoic sediments of Chiapas-Tabasco, and the Campeche basins are all pieces of one single trend of geologic continuity, which will constitute one of the bigger hydrocarbon strips of the world. Therefore, this study looks at the past and the new exploratory activity conducted by Pemex, trying to determin

  3. Demonstrating xLuna on ESA EXOMADER Rover

    NASA Astrophysics Data System (ADS)

    Braga, P.

    2012-01-01

    In this article we present xLuna [1] and its successful demonstration on the ESA EXOMArs DEmonstration Rover (EXOMADER) [2]. xLuna is a Linux-specific hypervisor extension for RTEMS, a Real-time Executive already used on ESA missions. On xLuna, RTEMS runs natively and directly on top of the hardware providing all its native services to real- time control applications. On top of the hypervisor runs a Linux kernel para-virtualised specifically for the system that provides all the well known POSIX based services and an endless set of software libraries to payload applications. On the demonstration, the complete navigation software of the rover (with stereo image processing and path processing) that was being tested ran on xLuna's Linux subsystem, while the RTEMS components were running control tasks. Due to impossibilities of integration, the RTEMS tasks running were simulated. The control was performed by existing HW.

  4. 5. Typical plankcovered flume. View looks west near Luna de ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    5. Typical plank-covered flume. View looks west near Luna de Miel Street. - Lake Hodges Flume, Along San Dieguito River between Lake Hodges & San Dieguito Reservoir, Rancho Santa Fe, San Diego County, CA

  5. baobabLUNA: the solution space of sorting by reversals.

    PubMed

    Braga, Marília D V

    2009-07-15

    Computing the reversal distance and searching for an optimal sequence of reversals to transform a unichromosomal genome into another are useful algorithmic tools to analyse real evolutionary scenarios. Currently, these problems can be solved by at least two available softwares, the prominent of which are GRAPPA and GRIMM. However, the number of different optimal sequences is usually huge and taking only the distance and/or one example is often insufficient to do a proper analysis. Here, we offer an alternative and present baobabLUNA, a framework that contains an algorithm to give a compact representation of the whole space of solutions for the sorting by reversals problem. Compiled code implemented in Java is freely available for download at http://pbil.univ-lyon1.fr/software/luna/. Documentation with methodological background, technical aspects, download and setup instructions, interface description and tutorial are available at http://pbil.univ-lyon1.fr/software/luna/doc/luna-doc.pdf.

  6. Luna 24 - Lateral heterogeneity in the lunar crust

    NASA Technical Reports Server (NTRS)

    Warner, J. L.; Simonds, C. H.; Mcgee, P. E.; Cochran, A.

    1978-01-01

    Results of petrological investigations of Luna 24 soil samples are compared with data from Apollo and other Luna missions in order to determine the large scale composition of the lunar surface and crust. Modal analysis of the 90 to 150 micron soil fraction and electron microprobe analysis of glass spheres and fragments of the Luna 24 core sample are presented. High and low MgO mare basalt compositional clusters are found, suggesting the derivation of southern Mare Crisium basalts from two magmas. A model of Luna 24 soils as being composed of a mixture of glass-poor mare material and glass-rich highland material is found to be consistent with glass and agglutinate modal abundances. Comparisons show that potassium, and by inference all lithophile trace elements, are depleted on the eastern limb of the moon relative to the central nearside. The observed depletion is interpreted to be characteristic of the underlying crust and mantle as well as the surface.

  7. TABASCO: A single molecule, base-pair resolved gene expression simulator.

    PubMed

    Kosuri, Sriram; Kelly, Jason R; Endy, Drew

    2007-12-19

    Experimental studies of gene expression have identified some of the individual molecular components and elementary reactions that comprise and control cellular behavior. Given our current understanding of gene expression, and the goals of biotechnology research, both scientists and engineers would benefit from detailed simulators that can explicitly compute genome-wide expression levels as a function of individual molecular events, including the activities and interactions of molecules on DNA at single base pair resolution. However, for practical reasons including computational tractability, available simulators have not been able to represent genome-scale models of gene expression at this level of detail. Here we develop a simulator, TABASCO http://openwetware.org/wiki/TABASCO, which enables the precise representation of individual molecules and events in gene expression for genome-scale systems. We use a single molecule computational engine to track individual molecules interacting with and along nucleic acid polymers at single base resolution. Tabasco uses logical rules to automatically update and delimit the set of species and reactions that comprise a system during simulation, thereby avoiding the need for a priori specification of all possible combinations of molecules and reaction events. We confirm that single molecule, base-pair resolved simulation using TABASCO (Tabasco) can accurately compute gene expression dynamics and, moving beyond previous simulators, provide for the direct representation of intermolecular events such as polymerase collisions and promoter occlusion. We demonstrate the computational capacity of Tabasco by simulating the entirety of gene expression during bacteriophage T7 infection; for reference, the 39,937 base pair T7 genome encodes 56 genes that are transcribed by two types of RNA polymerases active across 22 promoters. Tabasco enables genome-scale simulation of transcription and translation at individual molecule and single base

  8. Study of the redundancy of telemetry information of the Luna-9 and Luna-13 automatic lunar probes

    NASA Technical Reports Server (NTRS)

    Kantor, A. V.; Tolmadzheva, T. A.

    1974-01-01

    Knowledge of the statistical characteristics of natural telemetry information is important for the development of principles and methods of reduction of redundancy of telemetry messages as well as planning of on-board information compression devices. An evaluation was made to determine these characteristics for the telemetry information of the Luna-9 and Luna-13 automatic lunar probe, to allow estimation of the redundancy of the information. Histograms as well as numerical characteristics were used.

  9. TABASCO: A single molecule, base-pair resolved gene expression simulator

    PubMed Central

    Kosuri, Sriram; Kelly, Jason R; Endy, Drew

    2007-01-01

    Background Experimental studies of gene expression have identified some of the individual molecular components and elementary reactions that comprise and control cellular behavior. Given our current understanding of gene expression, and the goals of biotechnology research, both scientists and engineers would benefit from detailed simulators that can explicitly compute genome-wide expression levels as a function of individual molecular events, including the activities and interactions of molecules on DNA at single base pair resolution. However, for practical reasons including computational tractability, available simulators have not been able to represent genome-scale models of gene expression at this level of detail. Results Here we develop a simulator, TABASCO , which enables the precise representation of individual molecules and events in gene expression for genome-scale systems. We use a single molecule computational engine to track individual molecules interacting with and along nucleic acid polymers at single base resolution. Tabasco uses logical rules to automatically update and delimit the set of species and reactions that comprise a system during simulation, thereby avoiding the need for a priori specification of all possible combinations of molecules and reaction events. We confirm that single molecule, base-pair resolved simulation using TABASCO (Tabasco) can accurately compute gene expression dynamics and, moving beyond previous simulators, provide for the direct representation of intermolecular events such as polymerase collisions and promoter occlusion. We demonstrate the computational capacity of Tabasco by simulating the entirety of gene expression during bacteriophage T7 infection; for reference, the 39,937 base pair T7 genome encodes 56 genes that are transcribed by two types of RNA polymerases active across 22 promoters. Conclusion Tabasco enables genome-scale simulation of transcription and translation at individual molecule and single base

  10. Lunar Solar Origins Exploration (LunaSOX)

    NASA Technical Reports Server (NTRS)

    Cooper, John F.; King, Joseph H.; Papitashvili, Natasha; Lipatov, Alexander S.; Sittler, Edward C.; Hartle, Richard E.

    2011-01-01

    The Moon offers a unique vantage point from which to investigate the Sun and its interaction via the solar wind magnetic fields, plasma, and energetic particles with the geospace system including the Moon itself. The lunar surface and exosphere provide in part a record of solar coronal plasma material input and resultant space weathering over billions of years. The structure and dynamics of solar wind interactions with the Moon provide an accessible near-Earth laboratory environment for study of general solar wind interactions with the vast multitude of airless asteroidal bodies of the inner solar system. Spacecraft in lunar orbit have the often simultaneous opportunity, except when in the Earth's magnetosphere, to make in-situ compositional measurements of the solar wind plasma and to carry out remote observations from the Moon of the solar corona, potentially enabled by lunar limb occultation of the solar disk. The LunaSOX project at NASA Goddard Space Flight Center is addressing these heliophysical science objectives from and of the Moon with support from NASA's Lunar Advanced Science and Exploration Research (LASER) program: (1) specify history of solar wind parameters at and sunward of the Moon through enhanced access (http://lunasox.gsfc.nasa.gov/) to legacy and operational mission data products from the Apollo era to the present, (2) model field and plasma interactions with the lunar surface, exosphere, and wake, as constrained by the available data, through hybrid kinetic code simulations, and (3) advance mission concepts for heliophysics from and of the Moon.

  11. Selection of Luna-25 and Luna-27 landing sites based on LRO data

    NASA Astrophysics Data System (ADS)

    Sanin, A. B.; Mitrofanov, I. G.

    2016-12-01

    According to various orbital missions/measurements accomplished during last decades the increased hydrogen abundance (presumably considered as an indicator of water ice) was discovered and studied in Polar Regions of Moon. The origin of subsurface water and other volatiles in lunar regolith at Polar regions is under discussion now and in situ measurements and investigations are required to test different hypotheses. It could be accomplished during future Russian landing missions Luna-25 and Luna 27 scheduled for the time period of 2019-2021. Their main goals will closely be associated with search of water and volatiles in the regolith of landing sites. To support these observations we overview latest water ice mapping measurements of South Polar region from LEND and other experiments onboard NASA Lunar Reconnaissance Orbiter (LRO) to project existing orbital maps to local surface areas and identify preferable candidates for landing sites for these missions. The lunar Southern Polar Region characterized by highland terrains with a highly cratered and rugged relief, which give the complicated illumination conditions and radio visibility. That is why it is necessaey to implement a set of different science and engineering criteria to select appropriate landing site We will present a list of suitable landing site candidates determined as a result of implementation of a method developed in Space Research Institute based on automated analysis of Moon surface.

  12. Organochlorine pesticide level differences among female inhabitants from Veracruz, Puebla and Tabasco, Mexico.

    PubMed

    Waliszewski, Stefan M; Caba, M; Saldarriaga-Noreña, H; Martínez, A J; Meza, E; Valencia Quintana, R; Zepeda, R

    2014-08-01

    Organochlorine pesticides have been used in Mexico in malaria control programs and against ectoparasites. The objective of this study was to compare the levels of organochlorine pesticides: HCB, α-β-γ-HCH, pp'-DDE, op'-DDT and pp'-DDT in adipose tissue of female inhabitants from three Mexican states: Veracruz, Puebla and Tabasco. Data analyses indicated higher β-HCH levels in Puebla inhabitants. When comparing the mean values of the pp'-DDE concentrations among the three states, no statistically significant differences were noted. A trend of increasing concentrations of op'-DDT from Veracruz to Puebla and Tabasco was observed. Significantly higher pp'-DDT concentrations in Veracruz as compared to Puebla and Tabasco were determined. Using factorial analysis of three age categories (>30, 31-50, <51) organochlorine pesticide concentrations increases with age of participants, indicating time of exposure as a principal factor of organochlorine pesticides accumulation in adipose tissue.

  13. The radiation history of material returned by the Soviet automatic stations Luna 16 and Luna 20, according to track studies

    NASA Technical Reports Server (NTRS)

    Kashkarov, L. L.; Genayeva, L. I.; Lavrukhina, A. K.

    1977-01-01

    Fission tracks formed by the vH (very heavy) nuclei group of solar and galactic cosmic rays have been studied in silicate minerals of the lunar regolith returned by the Luna 16 and Luna 20 unmanned spacecraft. It is shown that the material in the Luna 16 core sample, from a typical mare region of the lunar surface, has undergone stronger irradiation by cosmic rays than material returned a highland region by Luna 20. A low-irradiation component (about 10 percent of the total number of crystals) has been found in the Luna 20 core sample materials, which can possibly be attributed to material added to the main bulk of the regolith in the formation of the crater Apollonius C. From the track density distribution of crystals, as a function of depth in the regolith core sample, it follows that the process of formation of the upper layer of the regolith, both for the lunar mare and for the highland region, includes sequential layering of finely crushed crystalline matter and subsequent mixing of it by micrometeorite bombardment. A portion of the crystals with a very high track density may be a component added to the lunar surface from outer space.

  14. New exploration campaign: most chance of success in Campeche-Chiapas-Tabasco

    SciTech Connect

    Not Available

    1981-11-01

    To recover from recent drops in oil prices, Mexico has recently decided to concentrate its hydrocarbon exploration efforts on the already productive Chiapas-Tabasco-Campeche areas, where the potential for success is the highest and the costly gathering and processing infrastructures are in place. Seismic and drilling tests have indicated the existence of a series of reservoirs stretching from Cardenas in the state of Tabasco out to the deep sea, just west of the currently producing zone in Campeche Bay. These deep-lying, high-pressure reservoirs appear to hold large quantities of light crude oil and natural gas.

  15. Human cytomegalovirus latency-associated protein LUNA is expressed during HCMV infections in vivo.

    PubMed

    Bego, Mariana G; Keyes, Lisa R; Maciejewski, Jarek; St Jeor, Stephen C

    2011-10-01

    Human cytomegalovirus (HCMV) latency is poorly understood. We previously described a novel HCMV latency-associated transcript, UL81-82ast, coding for a protein designated LUNA (latency unique natural antigen). The aim of this study was to confirm the presence of LUNA in HCMV-seropositive donors. Standard co-immunoprecipitation and ELISA assays were used to detect antibodies against the LUNA protein in the sera of HCMV-seropositive donors. Specific antibodies against LUNA were detected in all HCMV-seropositive donors but in none of the seronegative donors. These data confirm that LUNA is expressed during in vivo infections and is capable of eliciting an immune response.

  16. Lunar highlands volcanism implications from Luna 20 and Apollo 16

    USGS Publications Warehouse

    Wilshire, H.G.; Wilhelms, D.E.; Howard, K.A.

    1974-01-01

    Highlands materials sampled at the Apollo 16 and Luna 20 sites represent units of distinctive morphology that are widespread on the lunar nearside. Samples from the Apollo 16 site represent hilly and furrowed materials of the Descartes highlands and Cayley Formation. Materials were collected by Luna 20 from terrain resembling the Descartes terrain. Most photogeologic interpretations of these units favored volcanic origins, but the samples fail to support this interpretation. Luna 20 soil fragments are mainly glassy microbreccia with lithic inclusions of fine-grained hornfels; less than 3 percent of the fragments have textures of volcanic rocks, and most of these are likely crystalline products of impact melting. Apollo 16 soils formed on ejecta derived from a plutonic anorthosite-norite-troctolite suite. The similarity of Luna 20 soils indicates that these too formed as regolith on ejecta of anorthosite-norite-troctolitc composition. Interpretation of the samples from the two locations now suggests that hilly and furrowed terrains, previously thought to be of volcanic origin, are impact ejecta; in view of the plutonic nature of the source rocks and their extensive fusion and metamorphism, it is likely that the ejecta were derived from multiring basins. At one point, the Apollo 16 site, the Cayley Formation is composed of basin ejecta.

  17. Identity Theft: Gentrification, Latinidad, and American Girl Marisol Luna

    ERIC Educational Resources Information Center

    Rudolph, Jennifer Domino

    2009-01-01

    Released by Mattel in 2005, American Girl doll Marisol Luna quickly provoked controversy. The doll's accompanying narrative depicts her Chicago neighborhood of Pilsen as "dangerous" and recounts her family's move to the suburbs. Pilsen, located just south and west of downtown Chicago, has a long history as a Mexican (im)migrant port of…

  18. Investigation of the composition of the Luna 16 lunar sample

    NASA Technical Reports Server (NTRS)

    Bakos, L.; Chayka, M.; Cher, L.; Cheke, A.; Dogadkin, N. N.; Elek, A.; Kulchar, K.; Nagy, A.; Nagy, D. L.; Szabo, E.

    1977-01-01

    The concentrations of aluminum, manganese, sodium, chromium, iron, cobalt, and 12 rare earth elements were determined by neutron activation analysis using slow neutrons. Oxygen and silicon were determined using a fast neutron generator. Mossbauer spectroscopy was used to investigate iron compounds in Luna 16 regolith samples from the upper part of the core.

  19. Results of special mechanical analyses of Luna 16 material

    NASA Technical Reports Server (NTRS)

    Stiller, H.; Vollstaedt, H.; Wasch, R.; Bankwitz, P.; Bankwitz, E.; Wagner, F. C.; Schoen, J.

    1977-01-01

    The studies carried out on the Luna 16 regolith have confirmed the data that were already published internationally. By means of activation analysis under irradiation in the reactor, activation analysis with a 14 MeV U-generator, and mass spectroscopy on samples of 10 or 20 mg, six main and 63 trace elements were quantitatively determined and compared with known data.

  20. Rare earths and other trace elements in Luna 16 soil.

    NASA Technical Reports Server (NTRS)

    Helmke, P. A.; Haskin, L. A.

    1972-01-01

    An analysis has been made of four small samples of material brought to earth by the Luna 16 mission, with the aim to determine rare earths and other trace elements in these samples. The analytical results are tabulated, and the rare earth abundances are compared with the average for chondrites. A comparison is also made with the results of similar analyses of Apollo samples.

  1. Identity Theft: Gentrification, Latinidad, and American Girl Marisol Luna

    ERIC Educational Resources Information Center

    Rudolph, Jennifer Domino

    2009-01-01

    Released by Mattel in 2005, American Girl doll Marisol Luna quickly provoked controversy. The doll's accompanying narrative depicts her Chicago neighborhood of Pilsen as "dangerous" and recounts her family's move to the suburbs. Pilsen, located just south and west of downtown Chicago, has a long history as a Mexican (im)migrant port of…

  2. Luna 9 photographs: Evidence for a fragmental surface layer

    USGS Publications Warehouse

    Gault, D.E.; Quaide, W.L.; Oberbeck, V.R.; Moore, H.J.

    1966-01-01

    The morphological features of the lunar surface photographed by Luna 9 indicate a surficial layer of weakly cohesive to noncohesive fragmental material. Most of this material is finer than a centimeter and probably finer than a few millimeters, although objects of centimeter size and larger are plentiful.

  3. Movement, toxicity, and persistence of imidacloprid in seedling Tabasco pepper infested with Myzus persicae (Hemiptera: Aphididae).

    PubMed

    Diaz, Francisco J; McLeod, Paul

    2005-12-01

    Application of imidacloprid to the soil in which Tabasco pepper, Capsicum frutescens L., seedlings were growing was highly effective against the green peach aphid, Myzus persicae (Sulzer) (Hemiptera: Aphididae). In just 48 h after the soil drench, aphid numbers on treated plants declined from 292.1 to 33.0 per plant, a reduction of 89%. By 72 and 96 h after the application, the reductions were 97 and 100%, respectively. Reductions in green peach aphid numbers also indicated that imidacloprid readily moved throughout the Tabasco pepper plant. Although, initial green peach aphid reductions at 24 and 48 h after imidacloprid application to soil, were greater on the lower leaves than on the upper leaves, by 72 h toxicity was high throughout the plant. At 48 h, overall green peach aphid reduction on seedlings grown in wet soil was significantly higher than that on plants growing in the drier soil. Regardless of soil moisture or leaf location, no live green peach aphids were detected on treated seedlings after 96 h. After the initial uptake period, toxicity to green peach aphid remained high for 5 wk. Under Tabasco pepper production conditions in Central America, the greatest need for aphid management is just after transplanting. Imidacloprid soil drenches before transplanting should offer the Tabasco pepper producer an extended period of aphid-free production.

  4. U-Th-Pb measurements of Luna 20 soil

    USGS Publications Warehouse

    Tatsumoto, M.

    1973-01-01

    The concentrations of uranium, thorium and lead and the lead isotopic composition of Luna 20 soil were determined. The data indicate that the Luna 20 soil is mainly a mixture of highland anorthosites and low-K basalt, but little KREEP basalt. The U-Th-Pb systematics are discussed in comparison with other lunar soils, especially with Apollo 16 soils which were collected from a 'typical' highland region. The data fit well in the Apollo 16 soil array on a U-Pb evolution diagram, and they exhibit excess lead relative to uranium. This relationship appears to be a characteristic of highland localities. Considering the previous observations of lunar samples, we infer that lead enrichment in the soil relative to uranium occurred between 3.2 and 3.9 b.y. ago and that the soil was disturbed by 'third events' about 2.0 b.y. ago. A lunar evolution model is discussed. ?? 1973.

  5. Remembering Eliahu de Luna Montalto (1567–1616)

    PubMed Central

    Weisz, George M.; Lippi, Donatella

    2017-01-01

    Born in Portugal and the son of Marranos (Christianized Jews from Spain), Eliahu de Luna Montalto lived during a particularly harsh period for the Jewish people. Throughout Europe, the situation for Jews was unfavorable; laws had been passed forbidding them to live in England for the past 300 years, and for the past 200 years in France. Additionally, in France, while Jews were permitted to study at some universities, the practice of medicine was forbidden to them. It is within this context that Eliahu de Luna Montalto, who had returned to his original faith (Judaism), was recruited to the French court. This paper pays tribute to Montalto’s life and medical practice—so exemplary that the Queen of France would ask Montalto to serve at the court and receive Papal permission for Montalto openly to observe his faith as a Jew, this despite the objections of the King of France. PMID:28178444

  6. Luna-25 lander: science of the first lunar day

    NASA Astrophysics Data System (ADS)

    Malakhov, Alexey; Mitrofanov, Igor; Tretyakov, Vladislav; Litvak, Maxim; Prokhorov, Vasily; Kozyrev, Alexander; Mokrousov, Maxim; Vostrukhin, Andrey

    2015-04-01

    Luna-25 lander is a Roscosmos mission to investigate the southern lunar pole to launch in 2018. The mission aims at testing the landing capability of the spacecraft as well as conducting a number of science experiments. The instrument suite consists of 10 scientific experiments to study both, the landing site and the moon as a whole. These include measurements of soil composition and volatiles in the vicinity of the lander, environmental conditions such as temperature variations, plasma and dust exosphere of Moon, measurements of Moon inner structure through seismic, radio and laser ranging sensors. Luna-25 will also provide a number of images of the lander surroundings and samples collected in its robotic arm. We present the details of the investigations program for the first lunar day for the entire instruments suite.

  7. Luna 24 - Mineral chemistry of 90-150 micron clasts

    NASA Technical Reports Server (NTRS)

    Meyer, H. O. A.; Hwang, J.-Y.; Mccallister, R. H.

    1978-01-01

    The mineralogy, composition and source relations of monomineralic clasts in the size range 0.09 to 0.15 mm have been studied for seven grain mounts from the Luna 24 core, obtained in Mare Crisium. One of the core horizons, which showed the greatest number of mafic mineral clasts, apparently represents a less reworked level or one which received a greater average influx of gabbroic and/or basaltic ejecta. Most of the mafic minerals in the core were probably derived from the comminution of clasts of very low titanium basalts and/or gabbros. A small number of mineral clasts may have originated from a Mg-rich gabbro. A mixture of local mare basalts and ejecta from Fahrenheit crater probably makes up most of the regolith at the Luna 24 site.

  8. Flood surge through the Lunae Planum Outflow Complex, Mars

    NASA Technical Reports Server (NTRS)

    De Hon, R. A.; Pani, E. A.

    1992-01-01

    It is shown that the Maja outflow on Mars was released as a catastrophic outburst from Juventae Chasma. The flood surge traveled the first two-thirds of its length as a semiconfined sheetflood in a broad trough formed by the eastward-sloping Lunae Planum surface and the Xanthe Terra highlands to the east. At its northernmost extent, the flow ponded on the northern Lunae Planum surface. As the flow impounded on the upper Maja lake, waters rose to spill over the Xanthe Terra revetment onto the lower Chryse Planitia surface. The initial spillover crossed Xanthe Terra as sheetflood flow that muted topography over which it passed. The sheetflood was rapidly broken by the irregular topography to cut a complex series of anastomosing channels. A few main channels on eventually captured most of the drainage and local ponds formed in breached craters and irregular basins. The Maja Valles canyon eventually captured the remaining flow at the expense of all other channels.

  9. Remembering Eliahu de Luna Montalto (1567-1616).

    PubMed

    Weisz, George M; Lippi, Donatella

    2017-01-30

    Born in Portugal and the son of Marranos (Christianized Jews from Spain), Eliahu de Luna Montalto lived during a particularly harsh period for the Jewish people. Throughout Europe, the situation for Jews was unfavorable; laws had been passed forbidding them to live in England for the past 300 years, and for the past 200 years in France. Additionally, in France, while Jews were permitted to study at some universities, the practice of medicine was forbidden to them. It is within this context that Eliahu de Luna Montalto, who had returned to his original faith (Judaism), was recruited to the French court. This paper pays tribute to Montalto's life and medical practice-so exemplary that the Queen of France would ask Montalto to serve at the court and receive Papal permission for Montalto openly to observe his faith as a Jew, this despite the objections of the King of France.

  10. Luna 24 - Mineral chemistry of 90-150 micron clasts

    NASA Technical Reports Server (NTRS)

    Meyer, H. O. A.; Hwang, J.-Y.; Mccallister, R. H.

    1978-01-01

    The mineralogy, composition and source relations of monomineralic clasts in the size range 0.09 to 0.15 mm have been studied for seven grain mounts from the Luna 24 core, obtained in Mare Crisium. One of the core horizons, which showed the greatest number of mafic mineral clasts, apparently represents a less reworked level or one which received a greater average influx of gabbroic and/or basaltic ejecta. Most of the mafic minerals in the core were probably derived from the comminution of clasts of very low titanium basalts and/or gabbros. A small number of mineral clasts may have originated from a Mg-rich gabbro. A mixture of local mare basalts and ejecta from Fahrenheit crater probably makes up most of the regolith at the Luna 24 site.

  11. Trace element composition of Luna 24 Crisium VLT basalt

    NASA Technical Reports Server (NTRS)

    Haskin, L. A.

    1978-01-01

    The origins of the individual particles analyzed from the Luna 24 core and the information they provide on the trace-element composition of Mare Crisium basalt are considered. Previous analyses of several Luna 24 soil fragments are reviewed. It is concluded that: (1) the average trace-element concentrations for 12 VLT basalt fragments are the best available estimates for bulk samples of Crisium VLT basalt; (2) there is weak evidence that the average Crisium basalt might have a small positive Eu anomaly relative to chondritic matter; (3) the soils contain components from sources other than the Crisium VLT basalt; and (4) there is no convincing information in concentrations of rare-earth elements, Co, Sc, FeO, or Na2O among the analyzed fragments to indicate more than one parent basalt.

  12. Microprobe analyses of glasses and minerals from Luna-16 soil

    NASA Technical Reports Server (NTRS)

    Brown, R. W.; Harmon, R. S.; Jakes, P.; Reid, A. M.; Ridley, W. I.; Warner, J. L.

    1971-01-01

    Electron microprobe analyses are presented for nine elements in 250 glasses and 434 pyroxenes, eight elements in 113 olivines, and six elements in 354 feldspars, 35 spinels, and 159 ilmenites. All grains are from the 125-425 micron fraction of horizon A and horizon D soil from the Luna 16 sample. A norm is presented for each glass analysis and the structural formula is calculated for each mineral analysis.

  13. Particle track densities in the Luna 24 core

    NASA Technical Reports Server (NTRS)

    Blanford, G. E.; Wood, G. C.

    1978-01-01

    We report track density measurements in soil grains at six locations in the Luna 24 core. Irradiation levels are generally high precluding information on the depositional history, but indicating that the soils were exposed at the lunar surface at sometime in the past. Maturity levels determined from track density parameters disagree with those determined from ferromagnetic resonance and agglutinate contents. This discrepancy is not understood, but it could possibly indicate an ancient epoch of increased solar-flare activity.

  14. Boguslawsky Crater, Moon: Studying the Luna-Glob Landing Site

    NASA Astrophysics Data System (ADS)

    Hiesinger, H.; Ivanov, M.; Head, J. W.; Basilevsky, A. T.; Pasckert, J. H.; Bauch, K.; van der Bogert, C. H.; Abdrahimov, A. M.

    2014-04-01

    The main objective of the Russian Luna-Glob lander, which will land on the floor of Boguslawsky crater (~95 km in diameter, centered at 72.9S, 43.26E), is to test landing techniques. However, it will also carry a small scientific payload. Two landing ellipses, 30x15 km each, are under investigation: Ellipse West is at 72.9S, 41.3E, Ellipse East is at 73.3S, 43.9E [1].

  15. Late Cretaceous biostratigraphy of the La Luna Formation, Maracaibo basin

    SciTech Connect

    Truskowski, I.; Galeaalvarez, F.; Sliter, W.V.

    1996-08-01

    Micropaleontological analysis, sedimentological studies, and geochemical data are presented for the Upper Cretaceous {open_quote}black shales{close_quote} of the La Luna Formation of Western Venezuela. The detailed planktonic foraminiferal studies allowed the establishment of the first biozonation, determination of sedimentation rates, and documentation of occurrences of benthic foraminifers for these unusually thick black shales that extend stratigraphically nearly 100 m. Hedbergellids, whiteinellids and Heterohelix characterize the lower part of the La Luna Formation, dated from the late Cenomanian Rotalipora cushmani Zone to middle Turonian Helvetoglobotruncana belvetica Zone. The high productivity of these groups associated with phosphatized fish remains suggest upwelling and a poorly stratified water column. The presence of buliminids and Favreina sp. at some levels, imply disoxic conditions in this anoxic interval. Planktonic foraminifers in the middle and upper parts of the formation range in age from the late Turonian Marginotruncana sigali- Dicarinella primitiva Zone to the early Campanian Globotruncanita elevata Zone. The increase in keeled planktonic foraminifers toward the top of the formation suggest more stratified, oligotrophic surface waters. Benthic foraminifers found at the top are indicative of dysaerobic conditions. This study provides new opportunities for utilizing the petroleum system in the La Luna Formation, arguably the most prolific source rock in northern South America.

  16. Grain size and the evolution of Luna 24 soils

    NASA Technical Reports Server (NTRS)

    Mckay, D. S.; Basu, A.; Waits, G.

    1978-01-01

    The grain size distribution of six Luna 24 samples has been determined. These samples are characterized by a bimodal distribution which is indicative of soils formed primarily by mixing rather than by reworking. Although agglutinate content decreases with depth, it is not likely that the Luna 24 soils have undergone appreciable in situ reworking. Particle types and abundances in each of four size fractions have been determined petrographically. Mineral fragments are very abundant in all analyzed size fractions. Pyroxene and plagioclase increase slightly in abundance at finer grain sizes, but olivine decreases significantly. Compared with typical mare soils, the Luna 24 trends are anomalous. They are compatible with the hypothesis than many, if not most, of the mineral grains in the 20-250-micron fractions come from coarse-grain rocks having average mineral grain sizes greater than 250 microns. The mineralogy and chemistry of the coarse-grained rocks has not been well characterized, but there is evidence that at least some of them are higher in MgO than the analyzed finer-grained basalts.

  17. Grain size and the evolution of Luna 24 soils

    NASA Technical Reports Server (NTRS)

    Mckay, D. S.; Basu, A.; Waits, G.

    1978-01-01

    The grain size distribution of six Luna 24 samples has been determined. These samples are characterized by a bimodal distribution which is indicative of soils formed primarily by mixing rather than by reworking. Although agglutinate content decreases with depth, it is not likely that the Luna 24 soils have undergone appreciable in situ reworking. Particle types and abundances in each of four size fractions have been determined petrographically. Mineral fragments are very abundant in all analyzed size fractions. Pyroxene and plagioclase increase slightly in abundance at finer grain sizes, but olivine decreases significantly. Compared with typical mare soils, the Luna 24 trends are anomalous. They are compatible with the hypothesis than many, if not most, of the mineral grains in the 20-250-micron fractions come from coarse-grain rocks having average mineral grain sizes greater than 250 microns. The mineralogy and chemistry of the coarse-grained rocks has not been well characterized, but there is evidence that at least some of them are higher in MgO than the analyzed finer-grained basalts.

  18. Cross Section Measurements for the 23Na(p,γ)24Mg Reaction at LUNA

    NASA Astrophysics Data System (ADS)

    Boeltzig, Axel; LUNA Collaboration

    2016-02-01

    LUNA, the Laboratory for Underground Nuclear Astrophysics, is an accelerator facility for measurements of nuclear cross sections of astrophysical interest. The greatly reduced cosmic ray background at LUNA's underground location in the Gran Sasso National Laboratory (LNGS) allows direct measurements of weak reactions at low energies. One of the reactions currently under study at LUNA is 23Na(p,γ)24Mg, which links the NeNa and MgAl cycles in stellar burning. The LUNA facility is presented, with a focus on the current experimental efforts to study the reaction 23Na(p,γ)24Mg.

  19. ADRON Instrument for Luna-Resource and Luna-Glob Missions

    NASA Astrophysics Data System (ADS)

    Golovin, D.; Mitrofanov, I.; Barmakov, Y.; Bogolubov, E.; Litvak, M.; Sanin, A.; Kozyrev, A.; Malakhov, A.; Mokrousov, M.; Schatzkij, V.; Smirnov, G.; Ryzhkov, V.; Kurdumov, I.; Shvetsov, V.; Tretyakov, V.; Varenikov, A.; Vostrukhin, A.

    2012-04-01

    The interest to Moon investigations was increasing last decade. Many scientific and exploration missions were developed and about ten spacecrafts reached our nearest cosmic neighbor for detailed studying. Russian instrument LEND (Lunar Exploration Neutron Detector) received new interesting data about global lunar surface and distribution of hydrogen (water) enriched regions near poles in particular using collimation technique. Two of these regions are now landing sites of Russian-Indian project Luna-Resource and Russian lander Luna-Glob with planned launches in 2014 and 2015 respectively. One of scientific instruments onboard landers of both missions is ADRON (Active Detector of gamma Rays and Neutrons). The main tasks of the experiment are: 1) Definition of composition of the soil in the landing site; 2) Hydrogen content and distribution along depth; 3) Radiation background measurement; 4) Registering of Gamma-Ray Bursts. ADRON instrument is based on available heritage of design of DAN (MSL 2011, NASA) and MGNS (BepiColombo 2014, ESA). The concept ADRON is based on is the well-known method of nuclear well neutron logging for geological applications when detectors measure flux of scattered and moderated neutrons emitted by generator. Using scintillator one can detect spectrum of gamma-rays from soil and the lines intensities of this spectrum will indicate amount of a corresponding element in the subsurface up to 1 m depth during experiment on lunar surface. Instrument consists of two separate units: Pulse Neutron Generator (PNG) and Detectors and Electronic Unit (DEU). DEU (weight 3.8 kg, size 260×217×127 mm), besides of electronic for instrument control, contains LaBr3 crystal for measuring spectra of gamma rays and He3 proportional counters to detect thermal and epithermal neutrons. Fast electronics allow to get time profiles of gamma and neutrons flux with time resolution of up to 1 microsecond. PNG unit (weight 2.6 kg, size 331×125×45 mm) is connected to

  20. [Prevalence of malnutrition in minors under 5 years of age in Tabasco].

    PubMed

    Lastra-Escudero, L G; Roldán-Fernández, S G; Hernández-Martínez, E; Hernández-Torres, A P; Lechuga-Padrón, F G

    1998-01-01

    To evaluate malnutrition prevalence in children under five years-old in Tabasco, Mexico, during 1996, and their evolution in 1991-1996. A cross-sectional study, including 1,256 children under five years-old in 593 communities (31 urban and 562 rural) from 17 sanitary districts. The weight/age indicator for malnutrition in children under five years old showed 59% of children had normal nutrition and 41% with malnutrition, distributed as follows: 26.12% slight, 12.62% moderate and 2.39% severe. In children between 1-5 years old, malnutrition prevalence was 45%. The number of children with malnutrition in Tabasco during the study period (1991-1996) has decreased in proportion to the increase of those with normal nutrition. Based on the health system activities, the number of health districts with critical malnutrition indicators decreased from 6 to 4.

  1. [Prevalence of asthma. Survey of a school population in Villahermosa, Tabasco, Mexico].

    PubMed

    Baeza Bacab, M A; Grahma Zapata, L F

    1992-01-01

    In the state of Tabasco, Mexico, there apparently exists a great demand for medical care in children with asthma, yet the exact number of children with this illness is unknown. This motivated us to survey the parents of 5,625 school children with ages ranging from 6 to 12 years old (2,386 girls and 2,789 boys) living in the city of Villahermosa, Tabasco. The study included 11% of the school children in the vicinity. The survey showed that 22.3% of the population of school children refer chronic or repetitive respiratory symptoms; 8.7% referred a diagnosis of asthma; 6.8% bronchitis; 2.3% asthmatic form bronchitis; and 3.9% symptoms suggestive of repeated bronchial obstruction.

  2. [Scolitids (Coleoptera: Scolytidae) associated to the cocoa agroecosystem in Tabasco, Mexico].

    PubMed

    Pérez-De La Cruz, Manuel; Equihua-Martínez, Armando; Romero-Nápoles, Jesus; Sánchez-Soto, Saúl; García-López, Eustolia; Bravo-Mojica, Hiram

    2009-01-01

    The Scolytidae fauna associated to the cacao agroecosystem in Tabasco, Mexico was studied during 2007. Adult insects were captured by using ethanol and light traps, and by direct collecting in their host plants. 3,192 specimens of 34 species belonging to 18 genera of Scolytidae were collected. Twenty-two species are new records for the State of Tabasco. The genera with more species were Xyleborus (6) and Hypothenemus (6). We conclude that the Scolytidae fauna associated to the cacao agroecosystem captured with the three trap systems are similar through the year of study. We also conclude that although the ethanol traps were more efficient, obtaining the highest species diversity, the use of other methods is important.

  3. Lunar surface traces of engine jets of Soviet sample return probes: The enigma of the Luna-23 and Luna-24 landing sites

    NASA Astrophysics Data System (ADS)

    Shkuratov, Yuriy; Kaydash, Vadym; Sysolyatina, Xenija; Razim, Alexandra; Videen, Gorden

    2013-01-01

    We use a photometric method called phase-ratio imaging to study the landing sites of the Soviet Luna-16, Luna-20, Luna-23 and Luna-24 probes using the survey data of the lunar surface, which was carried out with the Narrow-Angle Cameras (NACs) of the Lunar Reconnaissance Orbiter (LRO) spacecraft. The phase-ratio images clearly show diffuse features associated with structure perturbations of the lunar regolith. We suggest that these features are caused by the impact of the gas jets from the rocket engines. The photometric anomalies around the landing sites suggest that the impacts smooth out the surface, destroying the primordial "fairy castle" structure that effectively produces the shadow-hiding effect. The same characteristic features have been found previously for the Apollo spacecraft landings, but over larger spatial scales. The only exception is the landing site of the Luna-24 probe, for which the feature of the possible impact of the gas jets is shifted to the northwest by approximately 150 m. As the Luna-24 descent module worked in the regular mode and could not allow such a shift as the probe was descending vertically, a possible explanation is that the sites of Luna-23 (an unsuccessful sample return mission) and Luna-24 are misidentified. The distance between the sites is about 2 km, which is within the inaccuracy of their coordinate determination. We suggest that because of faulty processing of the radar system for distance/speed control, the incorrectly operated engine and/or thrusters of Luna-23 produced the 150 m lateral drift before final deactivation and hard descent. To better understand the geologic situation, we produce brightness and phase-ratio anaglyphs for the vicinity of the landings.

  4. Papers presented to the Conference on Luna 24. [lunar soil studies

    NASA Technical Reports Server (NTRS)

    1977-01-01

    Topics covered include: the regional geology, geochemistry, and geophysics of Mare Crisium and the Luna 24 landing site; the petrology, mineral chemistry, and cooling histories of lithic fragments, the chemistry, isotopic studies, and geochronology of Luna 24 samples; and regolith studies of soil samples. Subject and topical indexes are provided.

  5. Antonio Bayés de Luna - the man behind the BaMa ECG Symposia.

    PubMed

    Nikus, Kjell

    2014-01-01

    Since 2005 Professor Antonio Bayés de Luna and Dr Miquel Fiol have invited experts in electrocardiography to consensus meeting in Barcelona and Mallorca. The meetings have resulted in consensus papers related to different electrocardiography topics. An interview with Professor Bayés de Luna was conducted. Copyright © 2014 Elsevier Inc. All rights reserved.

  6. Emerico Luna, an anatomist and a fervid intellectual.

    PubMed

    Gerbino, Aldo

    2004-01-01

    On 11 March 2004, the Section of Human Anatomy of Palermo was dedicated and registered to the anatomist Emerico Luna (Palermo 1882-1963) with a ceremony (moderated by Giovanni Zummo) with the participation of institutional personalities and Italian anatomists. Luna, who was an acute morphologist and a scholar of Riccardo Versari (1865-1943), was the continuator of Francesco Todaro's Anatomical School and occupied the Chair at the University of Palermo that had belonged to Levi since 1919. His wide histo-anatomical culture culminates in the collaboration to the "Trattato di Neurologia", the richly composed treatise by Bertelli (1931). Then his studies and his teaching reached to the Anatomia Clinica Regionale (1951). In charge of Histology and Normal Human Anatomy in 1920-21, he became a full professor and a master till 1952. He had so many students: among them Ignazio Fàzzari (1889-1986) who had the chair in the University of Florence, Alberto Monroy who had the charge of Compared Anatomy in the University of Palermo and Arcangelo Pasqualino from Marineo. Luna was co-founder and leader of the "Italian Society of Anatomy". He developed an intense research above all on the nervous system, the connective tissues, the arteries of the brain, and the experimental embryology, developing the radiological and clinical anatomy. He also dedicated himself to literature writing in 1953, among the scientific and literary works, a booklet titled Alla Fiera Delle Fantasie where he discuss the fantasy in a style that recall the literary evasion of the last period of crepuscolarism.

  7. Nittrouer Receives 2013 Luna B. Leopold Young Scientist Award: Citation

    NASA Astrophysics Data System (ADS)

    Parker, Gary

    2014-09-01

    Jeffrey Nittrouer has earned the 2013 Luna B. Leopold Award based on his research related to the most significant new discovery in fluvial morphology since the turn of the century, that is, for the identification of the lower Mississippi River as a mixed bedrock-alluvial stream, for his thorough quantification and elucidation of the dynamics of sand flow through it, and for his contributions to the use of Mississippi River sand as a tool for restoring lost land in the Mississippi delta wetlands.

  8. On the origin of Luna 24 basalts and soils

    NASA Technical Reports Server (NTRS)

    Ryder, G.; Marvin, U. B.

    1978-01-01

    Analyses of fine-grained very low titanium (VLT) basalt from the Luna 24 drill core suggest that a single homogeneous magma is represented by the sample. In particular, the small variation in MgO contents of the fine-grained basalt, together with the tight clustering of the compositions of brown glasses (which may be pyroclastic equivalents of the VLT basalt), provides evidence for the single-magma hypothesis. The high-Mg component in the soil samples, though not obviously explainable in petrographic terms, may be derived from material similar to olivine vitrophyre and its degraded products, or from some other high-Mg VLT basalt.

  9. Luna 24 ferrobasalt as a low-Mg primary melt

    NASA Technical Reports Server (NTRS)

    Norman, M.; Ryder, G.

    1980-01-01

    The fractional crystallization model for the petrogenesis of the Luna-24 very-low-titanium ferrobasalt is critically evaluated. Arguments are presented that show there is no real evidence favoring either surface of shallow subsurface differentiation of an Mg-rich primary magma; instead there is ample evidence suggesting such is not the case. It is therefore concluded that surface or near-surface fractionation of olivine from a primary vitrophyre/green glass magma did not produce the ferrobasalt composition. The ferrobasalt did not exist as a residual liquid within a differentiated flow, but rather was extruded as a melt in its own right.

  10. Glasses in the Luna 24 core and petrogenesis of ferrobasalts

    NASA Technical Reports Server (NTRS)

    Norman, M.; Coish, R. A.; Taylor, L. A.

    1978-01-01

    Modal abundance and major- and minor-element chemical analysis of homogeneous, non-agglutinitic mare and non-mare glasses from the Luna 24 drill core show that most glasses can be related to known rock types. Mare glasses include: brown glass identical in composition to the fine-grained low-Mg VLT basalt; green glass which might be related to a coarser-grained ferrogabbro; a high-K green glass; and a high-Ti orange glass. Highland glass compositions include Highland basalt, gabbroic anorthosite, and pure anorthosite (i.e. plagioclase); minor Fra Mauro-type glass may also be present. It is apparent that fractional crystallization of some primitive basaltic magma occurred at Mare Crisium producing a chemically evolved ferrobasalt and related glasses. An early, high-Mg basin fill, as represented by the olivine vitrophyres, may be the parent magma. Subsequent near-surface fractionation produced a multiply-saturated liquid that finally erupted as the ferrobasalt flows sampled by Luna 24.

  11. [Avifauna in silvopastoral systems in the Mesoamerican Biological Corridor, Tabasco, México].

    PubMed

    González-Valdivia, Noel; Barba-Macías, Everardo; Hernández-Daumás, Salvador; Ochoa-Gaona, Susana

    2014-09-01

    Silvopastoral systems support local ecological and economical features as they enhance conservation of floral and faunal communities. As other animal communities, avifauna may be a good representative of habitat alterations, both as the species and functional levels. In order to attend the initiative of Mesoamerican Biological Corridor initiative (CBM) in the state of Tabasco, we studied the diversity of birds in two silvopastoral systems: scattered trees in pastures (ADP), and trees in boundary-hedgerows (AL). For this, we applied the fixed radius counting point method in three priority sites in Tabasco's CBM during the dry and wet season of 2011, and a total of 56, 60 and 62 points were evaluated in Huimanguillo, Tenosique and Tacotalpa, respectively. We observed 2 084 individuals of 154 species (79-89% of expected diversity) and 36 bird families. We detected 92, 87 and 85 species in Huimanguillo, Tenosique and Tacotalpa, respectively, including 35 protected species, of which 23, 19 and 16 in each locality, respectively. All sites showed high diversity (H' ≥ 3.20), low species dominance (D ≥ 0.08) and high equitability (J ≥ 0.77). Species composition showed differences between sites, being most similar Tacotalpa and Tenosique. Ten species were considered characteristic for sites. Although the silvopastoral system did contain protected species, the low diversity and the early successional character of the arboreal components were not attractive to frugivorous bird species. Diversification with native trees can improve the systems to create a complementary habitat and to increase landscape connectivity. The management of silvopastoral practices on cattle dominated landscapes in Tabasco could improve its ecological quality, and thus achieve the CBM's objectives ofbiodiversity conservation combined with human economic activities.

  12. [Gerontological profile of an elderly population in Tabasco, México].

    PubMed

    Guerrero-Pérez, Ramiro; Quevedo-Tejero, Elsy Del Carmen; García-Rochín, Ramón; Zavala-González, Marco A

    2012-01-01

    Defining the gerontological profile of an elderly population in Tabasco, Mexico. This was an observational, retrospective, cross-sectional, descriptive study. The study population consisted of 35,745 elderly adults who were enrolled in the Mexican Older Adults' Institute (Instituto Nacional de las Personas Adultas Mayores-INAPAM) in Tabasco. Sampling was not used. The selection criteria invol ved elderly adults who were enrolled in INAPAM from January/2004-December/2006. Socio-demographic, sanitary and personal preferences were the variables considered. INAPAM's Mexican Survey of Senior Citizens' database for the study period was used for providing the necessary information; descriptive statistics were used for analysis. Some elderly adults were unable to work (11.9 %); those working did so in the countryside (10.5 %). Almost all of them had some sort of income (99.8 %): family support (46 %) or employment (22.3 %). A fifth of the population were illiterate (21 %). Most of them li ved with someone else (88.9 %) with a spouse (57.3 %) or children (45.9 %). Most li ved in their own houses (87.1 %), had basic services (94.3 %) and a stove, television and refrigerator (74.5 %). The frequently occurring diseases were osteo-degenerative (50.4 %), ophthalmic (39.2 %) dental (16.3 %), high blood pressure-related, Diabetes mellitus and tumours. Most had social security (63.3 %) but mostly used Mexican Ministry of Health services (28.7 %). They fostered the following values: health (81.2 %), family (72.4 %) and love (45.9 %); sharing family time was the most frequent free-time activity (72 %) followed by religious activities (56.4 %). The aforementioned features formed the gerontological profile for elderly adults in Tabasco; and the results of this series partially differed from that reported by other Mexican institutions.

  13. Bulk and rare earth abundances in the Luna 16 soil levels A and D.

    NASA Technical Reports Server (NTRS)

    Gillum, D. E.; Ehmann, W. D.; Wakita, H.; Schmitt, R. A.

    1972-01-01

    Determination of the abundances of major, minor, and trace elements by means of sequential INAA (instrumental neutron activation analysis) in two Luna 16 soils, at levels A (about 7 cm depth) and D (about 30 cm depth). Abundances of the bulk elements in Luna 16 soils generally agree with the values reported by Vinogradov (1971). Elemental abundances of both bulk and trace elements are nearly the same for the two A and D soil levels. Overall, the chemical compositions of the two Luna 16 soils are more closely related to Apollo 11 soil 10084 than to Apollo 12 and 14 soils, with the exception of TiO2 abundances.-

  14. Levels of organochlorine pesticides residues in human adipose tissue, data from Tabasco, Mexico.

    PubMed

    Waliszewski, Stefan M; Caba, M; Rodríguez Díaz, S S; Saldarriaga-Noreña, H; Meza, E; Zepeda, R; Infanzón, R

    2012-11-01

    The objective of this study was to determine the levels of organochlorine pesticides HCB, α-β-γ-HCH, p,p'-DDE, o,p'-DDT and p,p'-DDT in 150 adipose tissue of inhabitants of Tabasco, Mexico. The following pesticides were detected: p,p'-DDE in 100% of samples at mean 1.034 mg/kg; p,p'-DDT in 96.7% at mean 0.116 mg/kg; o,p'-DDT in 78.7% at mean 0.022 mg/kg and β-HCH in 58.0% at mean 0.049 mg/kg. The pooled sample was divided according to sex of donors (75 female and 75 male). Significantly higher levels of all organochlorine pesticides in females were found. The sample was divided into three age's ranges (15-28, 29-45 and 46-84 years). The mean and median levels of β-HCH, p,p'-DDE and Σ-DDT increase significantly (p < 0.05) from the first to the second and third group. The presence of organochlorine pesticide residues in Tabasco inhabitants is still observed, indicating sources of exposure to the pesticides.

  15. Prevalence of gastrointestinal parasites in domestic dogs in Tabasco, southeastern Mexico.

    PubMed

    Torres-Chablé, Oswaldo Margarito; García-Herrera, Ricardo Alfonso; Hernández-Hernández, Melchor; Peralta-Torres, Jorge Alonso; Ojeda-Robertos, Nadia Florencia; Blitvich, Bradley John; Baak-Baak, Carlos Marcial; García-Rejón, Julián Everardo; Machain-Wiliams, Carlos Ignacio

    2015-01-01

    The overall goal of this study was to estimate the prevalence of gastrointestinal (GI) parasites in dogs in the city of Villahermosa in Tabasco, Mexico. The study population consisted of 302 owned dogs that had limited access to public areas. A fecal sample was collected from each animal and examined for GI parasites by conventional macroscopic analysis and centrifugal flotation. Fecal samples from 80 (26.5%) dogs contained GI parasites. Of these, 58 (19.2%) were positive for helminths and 22 (7.3%) were positive for protozoan parasites. At least seven parasitic species were identified. The most common parasite was Ancylostoma caninum which was detected in 48 (15.9%) dogs. Other parasites detected on multiple occasions were Cystoisospora spp. (n = 19), Toxocara canis (n = 7) and Giardia spp. (n = 3). Three additional parasites, Dipylidium caninum, Trichuris vulpis and Uncinaria spp., were each detected in a single dog. No mixed parasitic infections were identified. In summary, we report a moderately high prevalence of GI parasites in owned dogs in Villahermosa, Tabasco. Several parasitic species identified in this study are recognized zoonotic pathogens which illustrates the important need to routinely monitor and treat dogs that live in close proximity to humans for parasitic infections.

  16. [Scolytidae and Platypodidae (Coleoptera: Curculionidae) of two conservation areas in Tabasco, Mexico].

    PubMed

    Pérez-De la Cruz, Manuel; Hernández-May, Manuel A; De la Cruz-Pérez, Aracely; Sánchez-Soto, Saúl

    2016-03-01

    The Scolytinae and Platypodinae are group of widely distributed tropical insects that are capable of using a wide range of hosts. The study of diversity associated with conservation sites allows estimating the richness and abundance of species, their population dynamics as well as understanding the population behavior over time. The species richness and abundance of Scolytinae and Platypodinae was studied in the Chontalpa Ecological Reserve (REC) and the José Narciso Rovirosa Botanical Garden (JBU) in Tabasco, Mexico. Insects were captured with ethyl alcohol traps. A total of 7 057 specimens belonging to 46 species and 26 genera were collected and identified; 42 species from 23 genera belong to Scolytinae and four species from three genera to Platypodinae. The species Bothrosternus foveatus (Blackman, 1943); Dendroterus luteolus (Schedl, 1951); Dendrocranulus guatemalensis (Hopkins, 1915); Micracis swainei (Blackman, 1920); Pseudothysanoes tenellus (Wood, 1971) y Ambrosiodmus obliquus (Leconte, 1878) are new records for the state of Tabasco. The species Corthylus papulans Eichhoff, 1869 with 2 509 specimens (35.55); Xyleborus volvulus (Fabricius, 1775) with 1 435 (20.33); and Xyleborus affinis Eichhoff, 1868 with 1 061 (15.03) were the most common species, representing 70.9 % of total. The population dynamics of these insects showed its highest peak during February and March with 2 728 specimens in JBU and December with 322 in REC of year 2010.

  17. [Geographic distribution of dengue fever cases in flooded zones from Villahermosa, Tabasco, in 2010].

    PubMed

    Jiménez-Sastré, Alejandro; Boldo-León, Xavier; Priego-Álvarez, Heberto; Quevedo-Tejero, Elsy; Zavala-González, Marco A

    2012-02-01

    To describe the geographical distribution of dengue fever cases in flooded areas of Villahermosa, Tabasco, in 2010. Cross-sectional, descriptive study. Universe: Colonies with antecedents of flooding during the inundation of the State, located in Villahermosa, Tabasco: Gaviotas Norte, Gaviotas Sur, La Manga 1th Section, La Manga 2nd Section and La Manga 3th Section. Convenience sample without randomization. location, dengue fever case. descriptive statistic. Software: SPSS version 11.0. 540 individuals were included. The distribution was: Gaviotas Norte, 36.1%; Gaviotas Sur, 24.8%; La Manga 1th Section, 13.8%; La Manga 2nd Section, 13.2%; and La Manga 3th Section, 12.1%. We found three cases with positive serology of IgG (0.6%) and five cases of positive IgM (0.9%). The geographical distribution was associated with the proximity to two water bodies: Rio Grijalva and Laguna El Encanto. It is necessary to reinforce preventive interventions in the proximity of bodies of fresh water.

  18. [Transmission of cutaneous leishmaniasis associated with cacao (Theobroma cacao) plantations in Tabasco].

    PubMed

    Carrada Figueroa, Georgina Del Carmen; Leal Ascencio, Víctor Javier; Jiménez Sastré, Alejandro; López Álvarez, Jorge

    2014-01-01

    Tabasco is the Mexican state that reported the highest number (37.4%) of patients with leishmaniasis during 1990-2011. Close to 90% of these patients lived in Chontalpa, where the municipality of Cunduacán accounted for the majority of the cases. One of the characteristics of this region is that houses are located within cacao plantations. To determine if cacao plantations are a risk factor for leishmaniasis transmission in locations of Cunduacán, Tabasco. We performed an analytical and retrospective study of 115 locations in Cunduacán, analyzing the number of localities with or without patients with leishmaniasis registered between 2000-2011 and, additionally, if they had cacao plantations, using a map where different crops were georeferenced. We measured the magnitude of the association (odds ratio, 95% CI). During the period 2000-2011, cases of leishmaniasis were reported in 77 (67.0%) Cunduacán locations, of these, 55 (71.4%) had cocoa plantations, five (6.5%) of banana, five (6.5%) of cane, and 12 (15.6%) had no crops georeferenced. We found that cocoa crops are a risk factor for the transmission of leishmaniasis (OR: 3.438; 95% CI: 1,526-7,742). The probability of transmission of leishmaniasis in areas with cocoa crops is greater than in communities without this crop.

  19. [Gnathostoma binucleatum (Spirurida: Gnathostomatidae) from the freshwater fish in Tabasco, Mexico].

    PubMed

    Kifune, Teiji; Lamothe-Argumedo, Rafael; García-Prieto, Luis; Oceguera-Figueroa, Alejandro; León-Règagnon, Virginia

    2004-06-01

    Human gnathostomiasis is a food-born parasitic disease of relative importance in many countries in Southeast Asia. It is caused by several species of nematodes of the genus Gnathostoma. In Mexico is an emerging public health problem since 1970, when first cases were reported. Until today, larval morphometric characters that have been proposed to differentiate between the three species of Gnathostoma present in this country, are not satisfactory. Recently, the presence of advanced third-stage larvae AdvL3 (infective form for humans) in freshwater fishes from Pantanos de Centla, Tabasco. was recorded but their specific identity was not clarified . Examination of four species of freshwater fishes from the same locality revealed that three of them: Petenia splendida (n=58), Cichlasoma managuense (n=35) and Gobiomorus dormitor (n=9) were infected by 15 AdvL3 of Gnathostoma binucleatum. Specific identity was obtained comparing the internal transcribed spacer 2 (ITS2) of the ribosomal DNA with sequences reported in Genbank. This is the first record of G. binucleatum in P. splendida and G. dormitor from Tabasco and the first specific determination of the parasite in the locality.

  20. Increase in Suicide Rates by Hanging in the Population of Tabasco, Mexico between 2003 and 2012.

    PubMed

    Hernández-Alvarado, Mervyn Manuel; González-Castro, Thelma Beatriz; Tovilla-Zárate, Carlos Alfonso; Fresán, Ana; Juárez-Rojop, Isela E; López-Narváez, María Lilia; Villar-Soto, Mario; Genis-Mendoza, Alma

    2016-06-01

    Worldwide, the suicide rate is decreasing. To examine changes in the rates of completed suicide in the Mexican population from 2003 to 2012, we analyzed these changes according to: (i) the method of suicide; (ii) age group and (iii) gender. The data analyzed were obtained from governmental organizations from the State of Tabasco, Mexico. The data provided 1836 cases of subjects born and residing in Tabasco, who completed suicide in this state. Suicide by hanging was a common choice of suicide method for Mexicans. The rate of suicide by hanging increased from 5.80 to 6.49 per 100,000 persons between 2003 and 2012, a rate percentage increase of 11.89%. Hanging was found to be the most common choice of suicide in the Mexican population, probably because the materials required are easily available and the method does not require complicated techniques, especially in the 55-64 age group. Strategies for prevention and intervention should be developed for the Mexican population considering suicide rates by age group and gender.

  1. Increase in Suicide Rates by Hanging in the Population of Tabasco, Mexico between 2003 and 2012

    PubMed Central

    Hernández-Alvarado, Mervyn Manuel; González-Castro, Thelma Beatriz; Tovilla-Zárate, Carlos Alfonso; Fresán, Ana; Juárez-Rojop, Isela E.; López-Narváez, María Lilia; Villar-Soto, Mario; Genis-Mendoza, Alma

    2016-01-01

    Background: Worldwide, the suicide rate is decreasing. To examine changes in the rates of completed suicide in the Mexican population from 2003 to 2012, we analyzed these changes according to: (i) the method of suicide; (ii) age group and (iii) gender. Methods: The data analyzed were obtained from governmental organizations from the State of Tabasco, Mexico. The data provided 1836 cases of subjects born and residing in Tabasco, who completed suicide in this state. Results: Suicide by hanging was a common choice of suicide method for Mexicans. The rate of suicide by hanging increased from 5.80 to 6.49 per 100,000 persons between 2003 and 2012, a rate percentage increase of 11.89%. Conclusions: Hanging was found to be the most common choice of suicide in the Mexican population, probably because the materials required are easily available and the method does not require complicated techniques, especially in the 55–64 age group. Strategies for prevention and intervention should be developed for the Mexican population considering suicide rates by age group and gender. PMID:27258292

  2. Nittrouer Receives 2013 Luna B. Leopold Young Scientist Award: Response

    NASA Astrophysics Data System (ADS)

    Nittrouer, Jeffrey A.

    2014-09-01

    I am grateful for receiving the Luna B. Leopold Award from the Earth and Planetary Surface Processes (EPSP) focus group at AGU. I am thankful to the mentors and colleagues who played important roles in shaping my science over the past 10 years. Significant credit goes to three people in particular: David Mohrig, Gary Parker, and Mead Allison. These gentlemen patiently developed and honed my skills for observing, modeling, and theorizing about the physical processes that produce fluvial-deltaic morphology and stratigraphy. It was an incredible opportunity to have worked with such a diverse set of thinkers, who regularly pushed me to consider and pursue new ideas, preventing too much comfort with the scientific status quo. Their mentoring fostered an independent and creative focus that produced the science for which this award has been generously given.

  3. Origin and modal petrography of Luna 24 soils

    NASA Technical Reports Server (NTRS)

    Basu, A.; Mckay, D. S.; Fruland, R. M.

    1978-01-01

    Petrographic modal analyses of polished grain mounts of fractions in the 20 to 250 micron size range from Luna 24 soil samples are presented and used to infer the nature and relative contributions of source rocks. It is found that more than 90% of the identifiable rock fragments are mare basalts, with about 11% of the soil consisting of the crystalline form. Soil breccias, which make up nearly 10% of the soil, are found to be immature. Electron probe analysis of glass particles reveals principle clusters conforming to anorthosite, anorthositic gabbro and mare basalts. More than half of the soil is composed of monomineralic particles, with pyroxene as the most abundant mineral. It is concluded that 85% of the regolith is derived from local mare basalts and gabbros and about 10% is derived from early cumulates of local mare basalt magma. Highland sources are considered to contribute not more than 3% of the regolith.

  4. Petrology, chemistry, age and irradiation history of Luna 24 samples

    NASA Technical Reports Server (NTRS)

    Wasserburg, G. J.; Papanastassiou, D. A.; Mcculloch, M. T.; Huneke, J. C.; Dymek, R. F.; Depaolo, D. J.; Chodos, A. A.; Albee, A. L.; Radicati Di Brozolo, F.

    1978-01-01

    The results of petrological, chemical, isotopic age determination and irradiation studies of sample 24170 from the 170 cm depth of the regolith core returned from Mare Crisium by Luna 24 are presented. The sample is found to be comprised of fragments from a single igneous rock, with mineralogical evidence indicating it to be a mare basalt. The crystallization age is determined by Sm-Nd and Ar(40)-Ar(39) ages to be 3.30 AE, establishing the presence of relatively young flows. All soil samples show low trace element compositions with minimum contamination by KREEPUTh-rich materials. Rb-Sr and Sm-Nd relations reflect the absence of significant fractionation at ages younger than 4.5 AE. One soil sample shows extremely large neutron capture effects, imposing a new lower limit to the neutron production rate in the regolith and requiring the addition of irradiated materials from depth.

  5. Petrology, chemistry, age and irradiation history of Luna 24 samples

    NASA Technical Reports Server (NTRS)

    Wasserburg, G. J.; Papanastassiou, D. A.; Mcculloch, M. T.; Huneke, J. C.; Dymek, R. F.; Depaolo, D. J.; Chodos, A. A.; Albee, A. L.; Radicati Di Brozolo, F.

    1978-01-01

    The results of petrological, chemical, isotopic age determination and irradiation studies of sample 24170 from the 170 cm depth of the regolith core returned from Mare Crisium by Luna 24 are presented. The sample is found to be comprised of fragments from a single igneous rock, with mineralogical evidence indicating it to be a mare basalt. The crystallization age is determined by Sm-Nd and Ar(40)-Ar(39) ages to be 3.30 AE, establishing the presence of relatively young flows. All soil samples show low trace element compositions with minimum contamination by KREEPUTh-rich materials. Rb-Sr and Sm-Nd relations reflect the absence of significant fractionation at ages younger than 4.5 AE. One soil sample shows extremely large neutron capture effects, imposing a new lower limit to the neutron production rate in the regolith and requiring the addition of irradiated materials from depth.

  6. TerraLuna: A CosmoQuest Adventure in Geology

    NASA Astrophysics Data System (ADS)

    Gay, Pamela; Bracey, Georgia; Gugliucci, Nicole

    The content of the session will focus on CosmoQuest’s TerraLuna unit, a comparative geology unit that uses authentic data to study the geology of the Moon and Earth. Inquiry activities will allow teachers to help their students compare crater formation and other surface features on the two bodies, comparing Moon features to similar structures on Earth. Links to the latest data from NASA’s Lunar Reconnaissance Orbiter will be introduced and hands- on activities will be featured as the basis for inquiry learning in elementary and middle level classrooms. Teachers will be introduced to citizen science projects that will enable their students to think like real scientists and engage in authentic scientific research, providing a useful service to the scientific community. Participation in the workshop introduces teachers to the CosmoQuest website, which includes a suite of citizen science activities. The site provides teachers with an online community dedicated to science inquiry and educational support.

  7. Origin and modal petrography of Luna 24 soils

    NASA Technical Reports Server (NTRS)

    Basu, A.; Mckay, D. S.; Fruland, R. M.

    1978-01-01

    Petrographic modal analyses of polished grain mounts of fractions in the 20 to 250 micron size range from Luna 24 soil samples are presented and used to infer the nature and relative contributions of source rocks. It is found that more than 90% of the identifiable rock fragments are mare basalts, with about 11% of the soil consisting of the crystalline form. Soil breccias, which make up nearly 10% of the soil, are found to be immature. Electron probe analysis of glass particles reveals principle clusters conforming to anorthosite, anorthositic gabbro and mare basalts. More than half of the soil is composed of monomineralic particles, with pyroxene as the most abundant mineral. It is concluded that 85% of the regolith is derived from local mare basalts and gabbros and about 10% is derived from early cumulates of local mare basalt magma. Highland sources are considered to contribute not more than 3% of the regolith.

  8. The geologic setting of the Luna 16 landing site

    USGS Publications Warehouse

    McCauley, J.F.; Scott, D.H.

    1972-01-01

    The Luna 16 landing site is similar in its geologic setting to Apollos 11 and 12. All three sites are located on basaltic mare fill which occurs mostly within multi-ring basins formed by impact earlier in the moon's history. A regolith developed by impact bombardment is present at each of these sites. The regolith is composed mostly of locally derived volcanic material, but also contains exotic fine fragments that have been ballistically transported into the landing sites by large impact events which formed craters such as Langrenus and Copernicus. These exotic fragments probably consist mostly of earlier reworked multi-ring basin debris and, although not directly traceable to individual sources, they do represent a good statistical sample of the composition of most of the premare terrac regions. ?? 1972.

  9. Luna 16 - Some Li, K, Rb, Sr, Ba, rare-earth, Zr, and Hf concentrations.

    NASA Technical Reports Server (NTRS)

    Philpotts, J. A.; Schnetzler, C. C.; Schuhmann, S.; Thomas , H. H.; Bottino, M. L.

    1972-01-01

    Concentrations of Li, K, Rb, Sr, Na, rare-earths, Zr and Hf have been determined for some Luna 16 core materials by mass-spectrometric isotope-dilution. Two regolith fines samples from different depths in the core, and four rock-chips, including both igneous rocks and breccias, have similar trace-element concentrations. The Luna 16 materials have general lunar trace-element characteristics but differ from other returned lunar samples in a manner that suggests the presence of excess feldspar. Unless the Luna 16 igneous rocks are fused soils, they appear to represent either partial plagioclase cumulates or the least differentiated igneous material yet returned from the moon. The similarity in trace-element concentrations of the igneous rocks and the fines would then suggest largely local derivation of the Luna 16 regolith.

  10. Cartography Support and Assessment of Candidate Landing Sites for the ``Luna-Glob'' Mission

    NASA Astrophysics Data System (ADS)

    Kokhanov, A.; Karachevtseva, I.; Oberst, J.; Gläser, Ph.; Wählisch, M.; Robinson, M. S.

    2012-03-01

    For cartography support of future landing mission LUNA-GLOB was development a geodatabase using data obtained by LRO. For characterization of the surface we created some examples of maps: slope, roughness, and hill-shaded relief in various scales.

  11. Luna 16 - Relative proportions and petrologic significance of particles in the soil from Mare Fecunditatis.

    NASA Technical Reports Server (NTRS)

    Reid, J. B., Jr.; Taylor, G. J.; Marvin, U. B.; Wood, J. A.

    1972-01-01

    Some 2380 lithic and vitreous particles from levels A and G of the Luna 16 core-tube sample were classified. The relative proportions of particle types from each of the two layers are reported, and some petrological and mineralogical aspects of the lithic and vitreous components of the lunar regolith are discussed. Possible sources of the particles in the Luna 16 soil are examined.

  12. [Prevalence of West Nile Virus infection in animals from two state zoos Tabasco].

    PubMed

    Hidalgo-Martínez, M; Puerto, Fernando I; Farfán-Ale, José Arturo; García-Rejón, Julián E; Rosado-Paredes, Elsy Del P; Méndez-Galván, Jorge; Figueroa-Ocampo, Raymunda; Takashima, Ikuo; Ramos, Celso

    2008-01-01

    To determine the prevalence of West Nile Virus (WNV) infection in animals, mosquitoes and employees from two zoos of Tabasco state, Mexico. WNV antibodies were detected by blocking ELISA in serum samples from animals. Viral RNA was detected by RT-PCR from mosquitoes and serum samples from employees at "Yum-Ká" zoo. Seroprevalence in birds was 25.65% (19/74) and 85% (6/7) in reptiles from "La Venta" zoo. Thirty-one percent of birds (50/160) and 34.48% mammals (16/29) at the "Yum-Ká" zoo, were seropositive. All human serum samples from Yum-ká zoo were negative by RT-PCR. A pool of mosquitoes (Culex quinquefasciatus) was positive for WNV. The presence of WNV antibodies in animals from both zoos and the detection of viral genome in mosquitoes demonstrate the presence of WNV in this region and indicates a potential risk of infection in animals and humans.

  13. [Prevalence of neutralizing antibodies to dengue virus serotypes in university students from Tabasco, Mexico].

    PubMed

    Sánchez-Burgos, Gilma Guadalupe; López-Alvarado, Miguel Angel; Castañeda-Desales, Deyanira; Ruiz-Gómez, Juan; Ramos-Castañeda, José

    2008-01-01

    Determine the seroprevalence of neutralizing antibodies to dengue virus in students from the state university of Tabasco, Mexico. A transversal study was conducted of serum collected from students between September and November, 2005. The sera were screened for anti-dengue IgG and those that had evidence of dengue antibodies were analyzed by a plaque reduction neutralization test. Prevalence of anti-dengue IgG was 9.1%. The frequency of neutralizing antibodies was 100% for DENV-2, 68% for DENV-4, 20% for DENV-1, and 4 % for DENV-3. We found that in this population, DENV-2 circulates more than DENV-3 despite the fact that DENV-3 is more frequently isolated. Unexpectedly, neutralizing antibodies against DENV-4 were frequently found even though this serotype is almost extinct; thus, it is probable that cross-immunity could suppress DEN-4 transmission, as has been suggested.

  14. Pollution by petroleum hydrocarbons in sediments from continental shelf of Tabasco State, Mexico

    SciTech Connect

    Botello, A.V.; Gonzalez, C.; Diaz, G. )

    1991-10-01

    The Wider Caribbean is potentially one of the largest oil producing areas in the world. Major petroleum production areas include Louisiana and Texas, USA; the Bay of Campeche, Mexico; Lake Maracaibo, Venezuela; and Gulf of Paria, Trinidad; all of which are classified as production accident high-risk zones. About 5 million of barrels are transported every day in the Caribbean, thus generating an intense tanker traffic. It has been estimated that oil discharges from tank washings within the Wider Caribbean could be as high as 7 million barrels/year. For all those reasons petroleum pollution is considered as the major environmental problem in the Wider Caribbean area and increasing day to day due to the use of petroleum as the main energy source. On the other hand, the continental shelf of Tabasco state actually represents one of the most productive areas for crude oil in the Gulf of Mexico. Sediments were collected from this area and analyzed for hydrocarbons.

  15. [Regulation of surrogate gestation and maternity in the state of Tabasco].

    PubMed

    Ortiz, Miguel Ángel León

    2015-01-01

    In recent years, one of the most disconcerting issues in bioethics, a field closely related to legal disciplines, is surrogate gestation or surrogacy. Very little is known about the medical nature of these novel therapeutic processes in legal study. Different dilemmas emerge in the fields of ethics, medicine and law. This paper analyses the normative content of the Tabasco civil regime with respect to the concepts, types and effects of surrogacy. It emphasizes the primacy of protecting the physical and emotional integrity of pregnant women and the legal protection of the nasciturus. In addition, this paper shows the exceptional nature of this prerogative for infertile people who cannot get pregnant through any other medical means, by posing surrogacy's ultima ratio regum characteristics.

  16. Petrology of some lithic fragments from Luna 20

    USGS Publications Warehouse

    Roedder, E.; Weiblen, P.W.

    1973-01-01

    Microscopic and electron microprobe studies were made of polished thin sections of part of a 30-mg sample of 250-500 ??m lunar soil returned by Luna 20 from a point between Mare Fecunditatis and Mare Crisium. Very fine-grained lithic (crystalline) rock fragments, composing about one fifth of the total sample, have mineralogical compositions equivalent to various types of gabbro, anorthositic gabbro, gabbroic anorthosite and troctolite, with minor basalt. The textures now observed in these fragments are in large part metamorphic. Twentyseven electron microprobe analyses of minerals from these fragments are presented, including olivine, plagioclase, pyroxene, spinel, nickel-iron and a Zr-Ti-REE mineral possibly similar to 'phase B' of Lovering and Wark (1971). Analyses of seven melt inclusions and twenty-eight defocused beam analyses of lithic fragments are also given. Some of the fragments contain 'gas' inclusions which, along with the fine grain size, are believed to indicate final crystallization under low pressure near surface conditions. The almost complete absence of granophyric material in this sample raises the question of whether or not there are at least two distinct magmas for the plagioclase-rich terrae rocks from which this soil sample was derived in part. ?? 1973.

  17. Dust moving analyser above surface for Luna missions

    NASA Astrophysics Data System (ADS)

    Dolnikov, G.; Zakharov, A.; Kuznetsov, I.; Lyash, A.; Shashkova, I.; Afonin, V.

    2014-04-01

    One of the complicating factors of the future lunar landing missions is the influence of the dust. Meteorites bombardment has accompanied by shockexplosive phenomena, disintegration and mix of the lunar soil in depth and on area simultaneously. As a consequence, the lunar soil has undergone physical and chemical transformations, melting, sintering and seal. The absence of an atmosphere on the Moon's surface is leading to greater compaction and sintering. Properties of regolith and dust particles (density, temperature, composition, etc.) as well as nearsurface lunar exosphere depend on solar activity, lunar local time and position of the Moon relative to the Earth's magneto tail. Upper layers of regolith are an insulator, which is charging as a result of solar UV radiation and the constant bombardment of charged particles, creates a charge distribution on the surface of the moon: positive on the illuminated side and negative on the night side. Charge distribution depends on the local lunar time, latitude and the electrical properties of the regolith (the presence of water in the regolith can influence the local distribution of charge). Studying the properties of lunar dust is important both for scientific purposes to investigation the lunar exosphere component and for the technical safety of lunar robotic and manned missions. Dust Experiment goals for future Luna missions are the investigation the dynamics of the lunar nearsurface dust (speed, charge, mass, vectors of fluxes), measure the dynamics of the electric fields of the near-surface plasma and the photoelectric work function for lunar regolith in situ.

  18. The vacuum system of IHI's compact SOR ``LUNA''

    NASA Astrophysics Data System (ADS)

    Oishi, M.; Uesaka, M.; Mandai, S.; Nishidono, T.; Nakashizu, T.; Hoshi, Y.

    1991-08-01

    The construction of the 800 MeV compact synchrotron light sources ``LUNA'' was completed in April 1989 at Tsuchiura Facility of IHI. 20 mA beam have been successfully accelerated up to 800 MeV and accumulated with the lifetime of more than 30 min. Now, the machine study and modifications are being done in order to get more accumulated beam currents and longer lifetime. In most of vacuum sections, the static vacuum pressure of less than 1x10E-7 Pa has been obtained and in the presence of synchrotron radiation, the vacuum pressure is measured as less than 1x10E-6 Pa. The SUS316L vacuum chambers were baked at 200 C For 70 hours in total. The surfaces of the vacuum chambers were treated with buff polishing, acid and freon flashing cleaning. In the 23 meters long vacuum system, ten 400 liter/sec ion pumps and 15 cartridge type nonevaporable getter (NEG) pumps are installed and the total vacuum pumping capacity is 6660 liter/sec. Additional, the beam channels for X-ray lithography and other experiments are going to be constructed in 1991.

  19. Metallic phases in the Luna 24 soil samples

    NASA Technical Reports Server (NTRS)

    Friel, J. J.; Goldstein, J. I.

    1977-01-01

    The metal and sulfide phases in the Luna 24 soil samples were studied with the optical microscope and the electron microprobe. The compositions of the metal particles fall into three groups based on their Ni and Co contents: (1) Samples of meteoritic composition which have undergone metamorphism on the lunar surface. (2) Samples of submeteoritic, low Ni and low Co contents, including most of the metal particles observed. These particles are contained in glass and agglutinate particles and were probably formed by the mixing of meteoritic metal with lunar metal produced by the reduction of silicates during shock-impact. (3) Samples of high-CO content probably formed by mixing of meteoritic material with high-Co metal from the mare basalt or by fractional crystallization from a metal silicate melt. The sulfide minerals were also studied. These are almost pure FeS, and crystallized from a late stage liquid in the mare basalt. Three high-Ni sulfides were also found in the glass phase of agglutinates.

  20. Petrology of some lithic fragments from Luna 20.

    NASA Technical Reports Server (NTRS)

    Roedder, E.; Weiblen, P. W.

    1973-01-01

    Microscopic and electron microprobe studies were made of polished thin sections of part of a 30-mg sample of 250- to 500-micron lunar soil returned by Luna 20 from a point between Mare Fecunditatis and Mare Crisium. Very fine-grained lithic (crystalline) rock fragments, composing about one-fifth of the total sample, have mineralogical compositions equivalent to various types of gabbro, anorthositic gabbro, gabbroic anorthosite, and troctolite, with minor basalt. The textures now observed in these fragments are in large part metamorphic. Twenty-seven electron microprobe analyses of minerals from these fragments are presented, including olivine, plagioclase, pyroxene, spinel, nickel-iron, and a Zr-Ti-REE mineral possibly similar to 'phase B' of Lovering and Wark (1971). Analyses of seven melt inclusions and 28 defocused beam analyses of lithic fragments are also given. Some of the fragments contain 'gas' inclusions which, along with the fine grain size, are believed to indicate final crystallization under low pressure near surface conditions.

  1. Oxide minerals in lithic fragments from Luna 20 fines.

    NASA Technical Reports Server (NTRS)

    Brett, R.; Gooley, R. C.; Dowty, E.; Prinz, M.; Keil, K.

    1973-01-01

    One hundred seventy-six oxide mineral grains in the Luna 20 samples were analyzed by electron microprobe. Spinel is the most abundant oxide, occurring in troctolite fragments. Next most abundant is ilmenite, which occurs in all rock types except those containing spinel. Chromite also occurs in all rock types except those containing spinel. Minor amounts of ulvospinel, armalcolite, zirkelite, baddeleyite and an unidentified TiO2-rich phase were also found. Spinel grains are predominantly spinel-hercynite solid solutions, commonly with very minor chromite. The Fe/(Fe + Mg) ratio is generally lower than in spinel from Apollo 14 rocks. Chromites in non-mare rocks are similar to those from mare rocks. Ilmenite of mare origin is Mg-poor and Zr-rich compared to non-mare ilmenite; these elements may therefore be useful in determining the origin of ilmenite grains. Phase equilibria considerations suggest that spinel troctolite crystallized from a melt high in alumina; a likely candidate is the high-alumina basalt of Prinz et al. (1973).

  2. Onboard Processing of Electromagnetic Measurements for the Luna - Glob Mission

    NASA Astrophysics Data System (ADS)

    Hruska, F.; Kolmasova, I.; Santolik, O.; Skalski, A.; Pronenko, V.; Belyayev, S.; Lan, R.; Uhlir, L.

    2013-12-01

    The LEMRA-L instrument (Long-wavelength Electro-Magnetic Radiation Analyzer) will be implemented on the LUNA-GLOB spacecraft. It will analyze the data of the three-axial flux gate (DC - 10Hz) and searchcoil (1Hz - 10kHz) magnetometers LEMI. It will measure intensity, polarization, and coherence properties of waves in plasmas of the solar wind, in the lunar wake and its boundaries, and study the magnetic anomalies. We will use new modern robust onboard analysis methods to estimate the wave coherence, sense of polarization, ellipticity, and wave-vector direction, and thus substantially compress the transmitted data volumes, while conserving the important scientific information. In the burst mode data set intended for studying nonlinear phenomena, we will conserve the continuous flux-gate magnetometer data and discrete snapshots of three axial waveform measurements. In the survey-mode data set, continuous flux-gate magnetometer data will be transmitted together with onboard analyzed and averaged spectral matrices from the higher-frequency wave measurements or with onboard calculated propagation and polarization parameters.

  3. Use of seismic data for statistical estimation of outcome probabilities of complexly faulted structures in Tabasco Basin, Mexico

    SciTech Connect

    Berlanga, J.M.; Harbaugh, J.W.

    1981-03-01

    Seismic data can be used for statistical estimation of the exploration outcomes of specific prospects. This study involves estimation of the outcome probabilities for complexly faulted domal structures in the Tabasco basin of Mexico. Seismic reflection times were contoured by computer throughout much of the Tabasco basin, employing a special computer algorithm to accommodate the complex system of faults. Computer contouring was deemed essential for systematic statistical treatment. The probability estimates relating presence of petroleum to seismically interpreted structures involved combining two independent sources of uncertainty, namely, uncertainty in the contoured representation of the structures, and uncertainty as to the presence of petroleum in view of the specific attributes of the structures. Residuals from third-degree polynomial trend surfaces. The procedures developed could be used in other regions.

  4. [Leishmaniasis: a preliminary epidemiological study in a locality of the endemic area in the state of the Tabasco].

    PubMed

    Córdova-Uscanga, C; Albertos-Alpuche, N E; Andrade-Narváez, F J; Canto-Lara, S B

    1993-01-01

    The state of Tabasco is localized in the endemic area of cutaneous leishmaniasis where both diffuse cutaneous leishmaniasis and mucocutaneous leishmaniasis have recently been reported. The objective of the present study was to obtain reliable information of the situation of this disease--which has a great relevance as a worldwide public health problem--through determination of the allergic index in a randomized sample from Ranchería Miguel Hidalgo, Comalcalco Municipality, Tabasco, Mexico. We found an allergic index of 56 per cent. Farmers and housewives had the highest positive responses to the Montenegro skin test. We found no statistical differences between males and females. Moreover, 3 patients with active lesions and people with scars suggestive of prior leishmaniasis were detected during the study. This village should be considered a high endemic focus.

  5. Oiling the system: How activities and the state shaped the politics of petroleum development in Tabasco, Mexico

    NASA Astrophysics Data System (ADS)

    Hanson, Heather Dawn

    This dissertation analyzes the social, economic and political processes that accompanied the development of petroleum resources in Tabasco, Mexico. Through an historical examination of the case of Tabasco, I explore the general question of how and why state-led development becomes a contested terrain. Why does this sort of activism flourish during some time periods and not others? Under what conditions are relatively marginalized people able to effectively challenge the sort of domination inherent in state-led development plans? To what extent can activists succeed at reshaping the course of development? I argue that protest of state-led development is not necessarily linked to the pace or absolute impact of the social, environmental and economic changes being promoted. Instead, what is most central is the degree to which activists can successfully portray state-led development as an unjust process that contributes to inequality. However, the fact that activists are always constrained by the limits of existing state discourse seriously constrains the range of actions open to marginalized people. In the case of oil development in Tabasco, while activists were free to challenge the uneven distribution of rents, they have not been able to challenge the process itself. Indeed, the promise of material progress is common ground for both activists and the state. I conclude my dissertation with the observation that just as state discourses simultaneously create and limit possibilities for citizen protest, so social movement discourses simultaneously push for change and solidify the existing inequitable social structures.

  6. Two separate regions in the genome of the tobacco etch virus contain determinants of the wilting response of Tabasco pepper.

    PubMed

    Chu, M; Lopez-Moya, J J; Llave-Correas, C; Pirone, T P

    1997-05-01

    Infection of Tabasco pepper by the tobacco etch virus (TEV) typically causes wilting associated with root necrosis. However, a strain of TEV, designated TEV nonwilting (TEV NW), is able to infect Tabasco pepper plants but does not cause wilting. In order to locate the genetic determinants responsible for the wilting response, a full-length cDNA clone of TEV NW from which infectious transcripts can be derived was made. A number of chimeric constructs were prepared by substituting cDNA fragments between TEV HAT (which causes wilting) and TEV NW clones. This approach was used to identify two wilting determinants in TEV HAT: one encompasses the 3' one-third of the P3 encoding region; the other spans the 3' end of the CI, the 6-kDa protein, and the 5' end of the VPg-NIa coding regions. Substitutions of both these TEV NW fragments into TEV HAT resulted in infection but not wilting of Tabasco pepper, while the replacement of either of the fragments alone did not alter the wilting response. This indicates that both TEV NW regions contain determinants necessary but not sufficient to alter the wilting response and that both must be present in order to avoid the wilting response. There was no difference between the in vitro transcription-translation products derived from constructs containing these regions from TEV HAT and TEV NW.

  7. HCMV protein LUNA is required for viral reactivation from latently infected primary CD14⁺ cells.

    PubMed

    Keyes, Lisa R; Hargett, Danna; Soland, Melisa; Bego, Mariana G; Rossetto, Cyprian C; Almeida-Porada, Graca; St Jeor, Stephen

    2012-01-01

    Human cytomegalovirus (HCMV) is a member of the Herpesviridae family that infects individuals throughout the world. Following an initial lytic stage, HCMV can persist in the individual for life in a non-active (or latent) form. During latency, the virus resides within cells of the myeloid lineage. The mechanisms controlling HCMV latency are not completely understood. A latency associated transcript, UL81-82ast, encoding the protein LUNA (Latency Unique Natural Antigen) was identified from latently infected donors in vivo. To address the role of the UL81-82ast protein product LUNA, in the context of the viral genome, we developed a recombinant HCMV bacterial artificial chromosome (BAC) that does not express LUNA. This construct, LUNA knockout FIX virus (FIX-ΔLUNA), was used to evaluate LUNA's role in HCMV latency. The FIX-ΔLUNA virus was able to lytically infect Human Fibroblast (HF) cells, showing that LUNA is not required to establish a lytic infection. Interestingly, we observed significantly higher viral copy numbers in HF cells infected with FIX-ΔLUNA when compared to FIX-WT virus. Furthermore, FIX-WT and FIX-ΔLUNA genomic DNA and transcription of UL81-82ast persisted over time in primary monocytes. In contrast, the levels of UL138 transcript expression in FIX-ΔLUNA infected HF and CD14⁺ cells was 100 and 1000 fold lower (respectively) when compared to the levels observed for FIX-WT infection. Moreover, FIX-ΔLUNA virus failed to reactivate from infected CD14⁺ cells following differentiation. This lack of viral reactivation was accompanied by a lack of lytic gene expression, increase in viral copy numbers, and lack of the production of infectious units following differentiation of the cells. Our study suggests that the LUNA protein is involved in regulating HCMV reactivation, and that in the absence of LUNA, HCMV may not be able to enter a proper latent state and therefore cannot be rescued from the established persistent infection in CD14⁺ cells.

  8. K-Ar dating of lunar fines - Apollo 12, Apollo 14, and Luna 16.

    NASA Technical Reports Server (NTRS)

    Pepin, R. O.; Bradley, J. G.; Dragon, J. C.; Nyquist, L. E.

    1972-01-01

    K-Ar ages were determined on a 6-in. double-focus mass spectrometer in fines of less than 1 mm from Apollo 14 and 16, and Luna 16 lunar soil samples. Age estimates of about 2.8 AE and about 4.0 AE are suggested for the two low-K components whose presence in the samples must be assumed to accommodate the age data. An average value of 0.1849 plus or minus 0.0008 was obtained for the Ar-18/Ar-36 ratio in the solar wind from ordinate intercept correlations for the Apollo 14 and Luna 16 samples. Cosmic ray exposure ages were close to 440 m.y. for both Apollo 14 samples and close to 840 m.y. for both Luna 16 samples.

  9. Luna 24 - Systematics in spinel mineral chemistry in the context of an intrusive petrogenetic grid

    NASA Technical Reports Server (NTRS)

    Haggerty, S. E.

    1978-01-01

    Spinels in the Luna 24 gabbroic fragments have a restricted bimodal distribution of aluminum chromite and ulvospinel, whereas those in the Luna 24 basalts form a continuous sequence which defines a compositional variation from Al-Mg-chromites to ulvospinels containing 1 wt% Al2O3. A comparison of these spinel mineral chemistries with basaltic spinels from other mare regions and with spinels from other lunar intrusive rocks suggest that the Luna 24 gabbroic spinels lie at the low pressure end of a P-T spinel grid, and that titanium enrichment trends on Mg-Al-Cr rich spinel cores are related to extrusion and formed at the terminal stages of magmatic crystallization.

  10. Rare earths, other trace elements and iron in Luna 20 samples.

    NASA Technical Reports Server (NTRS)

    Helmke, P. A.; Blanchard, D. P.; Jacobs, J. W.; Haskin, L.; Haskin, A.

    1973-01-01

    The results of the analysis by neutron activation of six samples from the Luna 20 mission and one sample of less than 1 mm fines from Apollo 16 are reported. The concentrations of the rare-earth elements (REE) in the samples of fines from Luna 20 and Apollo 16 are less than those found for corresponding materials from the mare areas but a negative Eu anomaly is still present. The concentrations of the REE in fines from Luna 20 are only about two-thirds as great as in the sample of Apollo 16 fines, but the concentration of Co, Sc and Cr are greater by factors ranging from 1.5 to 2.3.

  11. Chemistry and thermal history of metal particles in Luna 20 soils.

    NASA Technical Reports Server (NTRS)

    Goldstein, J. I.; Blau, P. J.

    1973-01-01

    Individual metal particles from Luna 20 thin sections 521, 513 and 514 as well as several small metallic inclusions in silicate particles from Luna 20 thin sections 501 and 502 were examined using optical microscopy and the electron microprobe. All the metallic particles and inclusions analyzed are of meteoritic Co-Ni content as are most of the metallic particles from the Fra Mauro and the Apollo 16 highlands sites. It is proposed that most of the metal at these 3 sites had its origin in the meteoritic projectiles that bombarded and accumulated in the early lunar crust. It is apparent that the metallic particles and some of the metallic inclusions in the Luna 20 soil have been subjected to reheating on the moon and this process has removed any evidence of the original meteoritic microstructure of the metal.

  12. K-Ar dating of lunar fines - Apollo 12, Apollo 14, and Luna 16.

    NASA Technical Reports Server (NTRS)

    Pepin, R. O.; Bradley, J. G.; Dragon, J. C.; Nyquist, L. E.

    1972-01-01

    K-Ar ages were determined on a 6-in. double-focus mass spectrometer in fines of less than 1 mm from Apollo 14 and 16, and Luna 16 lunar soil samples. Age estimates of about 2.8 AE and about 4.0 AE are suggested for the two low-K components whose presence in the samples must be assumed to accommodate the age data. An average value of 0.1849 plus or minus 0.0008 was obtained for the Ar-18/Ar-36 ratio in the solar wind from ordinate intercept correlations for the Apollo 14 and Luna 16 samples. Cosmic ray exposure ages were close to 440 m.y. for both Apollo 14 samples and close to 840 m.y. for both Luna 16 samples.

  13. Implications from Luna 24 sample 24170 to U-Pb evolution in the lunar mantle

    NASA Technical Reports Server (NTRS)

    Unruh, D. M.; Tatsumoto, M.

    1978-01-01

    The concentrations of U, Th and Pb, as well as the Pb isotopic composition, have been determined for a Luna 24 sample from the Mare Crisium area. A relatively recent disturbance to the U-Pb system during meteorite impact or burial in hot ejecta is suggested by the findings. According to three-stage U-Pb evolution model calculations, the source cumulates of the Luna 24 basalt evolved in a U-238/Pb-204 environment much lower than that of the Apollo mare basalts. A laterally heterogeneous lunar magma ocean, U-Pb fractionation during cumulate formation, and/or lack of KREEP addition to the Luna 24 basalt are also reflected in the calculations.

  14. Luna 24 - Systematics in spinel mineral chemistry in the context of an intrusive petrogenetic grid

    NASA Technical Reports Server (NTRS)

    Haggerty, S. E.

    1978-01-01

    Spinels in the Luna 24 gabbroic fragments have a restricted bimodal distribution of aluminum chromite and ulvospinel, whereas those in the Luna 24 basalts form a continuous sequence which defines a compositional variation from Al-Mg-chromites to ulvospinels containing 1 wt% Al2O3. A comparison of these spinel mineral chemistries with basaltic spinels from other mare regions and with spinels from other lunar intrusive rocks suggest that the Luna 24 gabbroic spinels lie at the low pressure end of a P-T spinel grid, and that titanium enrichment trends on Mg-Al-Cr rich spinel cores are related to extrusion and formed at the terminal stages of magmatic crystallization.

  15. Implications from Luna 24 sample 24170 to U-Pb evolution in the lunar mantle

    NASA Technical Reports Server (NTRS)

    Unruh, D. M.; Tatsumoto, M.

    1978-01-01

    The concentrations of U, Th and Pb, as well as the Pb isotopic composition, have been determined for a Luna 24 sample from the Mare Crisium area. A relatively recent disturbance to the U-Pb system during meteorite impact or burial in hot ejecta is suggested by the findings. According to three-stage U-Pb evolution model calculations, the source cumulates of the Luna 24 basalt evolved in a U-238/Pb-204 environment much lower than that of the Apollo mare basalts. A laterally heterogeneous lunar magma ocean, U-Pb fractionation during cumulate formation, and/or lack of KREEP addition to the Luna 24 basalt are also reflected in the calculations.

  16. The analysis of various size, visually selected and density and magnetically separated fractions of Luna 16 and 20 samples

    NASA Technical Reports Server (NTRS)

    Eglinton, G.; Gowar, A. P.; Jull, A. J. T.; Pillinger, C. T.; Agrell, S. O.; Agrell, J. E.; Long, J. V. P.; Bowie, S. H. U.; Simpson, P. R.; Beckinsale, R. D.

    1977-01-01

    Samples of Luna 16 and 20 have been separated according to size, visual appearance, density, and magnetic susceptibility. Selected aliquots were examined in eight British laboratories. The studies included mineralogy and petrology, selenochronology, magnetic characteristics, Mossbauer spectroscopy, oxygen isotope ratio determinations, cosmic ray track and thermoluminescence investigations, and carbon chemistry measurements. Luna 16 and 20 are typically mare and highland soils, comparing well with their Apollo counterparts, Apollo 11 and 16, respectively. Both soils are very mature (high free iron, carbide, and methane and cosmogenic Ar), while Luna 16, but not Luna 20, is characterized by a high content of glassy materials. An aliquot of anorthosite fragments, handpicked from Luna 20, had a gas retention age of about 4.3 plus or minus 0.1 Gy.

  17. Big Bang 6Li nucleosynthesis studied deep underground (LUNA collaboration)

    NASA Astrophysics Data System (ADS)

    Trezzi, D.; Anders, M.; Aliotta, M.; Bellini, A.; Bemmerer, D.; Boeltzig, A.; Broggini, C.; Bruno, C. G.; Caciolli, A.; Cavanna, F.; Corvisiero, P.; Costantini, H.; Davinson, T.; Depalo, R.; Elekes, Z.; Erhard, M.; Ferraro, F.; Formicola, A.; Fülop, Zs.; Gervino, G.; Guglielmetti, A.; Gustavino, C.; Gyürky, Gy.; Junker, M.; Lemut, A.; Marta, M.; Mazzocchi, C.; Menegazzo, R.; Mossa, V.; Pantaleo, F.; Prati, P.; Rossi Alvarez, C.; Scott, D. A.; Somorjai, E.; Straniero, O.; Szücs, T.; Takacs, M.

    2017-03-01

    The correct prediction of the abundances of the light nuclides produced during the epoch of Big Bang Nucleosynthesis (BBN) is one of the main topics of modern cosmology. For many of the nuclear reactions that are relevant for this epoch, direct experimental cross section data are available, ushering the so-called "age of precision". The present work addresses an exception to this current status: the 2H(α,γ)6Li reaction that controls 6Li production in the Big Bang. Recent controversial observations of 6Li in metal-poor stars have heightened the interest in understanding primordial 6Li production. If confirmed, these observations would lead to a second cosmological lithium problem, in addition to the well-known 7Li problem. In the present work, the direct experimental cross section data on 2H(α,γ)6Li in the BBN energy range are reported. The measurement has been performed deep underground at the LUNA (Laboratory for Underground Nuclear Astrophysics) 400 kV accelerator in the Laboratori Nazionali del Gran Sasso, Italy. The cross section has been directly measured at the energies of interest for Big Bang Nucleosynthesis for the first time, at Ecm = 80, 93, 120, and 133 keV. Based on the new data, the 2H(α,γ)6Li thermonuclear reaction rate has been derived. Our rate is even lower than previously reported, thus increasing the discrepancy between predicted Big Bang 6Li abundance and the amount of primordial 6Li inferred from observations.

  18. Tectonic and sedimentary evolution of the Luna field area, Italy

    SciTech Connect

    Roveri, M. )

    1990-05-01

    The Luna gas field is located near Crotone (Calabria region, southern Italy) in a shallow-water/onshore area. It was discovered and put into production during the early 1970s. Up to now it has produced 19 {times} 10{sup 9} sm{sup 3} of gas; its productivity (50 {times} 10{sup 6} sm{sup 3}/y) has remained virtually unaltered since the beginning. The field is located on the axial culmination of a thrust-related anticline of the Apennine postcollisional thrust belt; it can be roughly subdivided into two areas characterized by different stratigraphic contexts. In the northern and central parts of the field is a structural trap. Reservoir rocks are Serravallian to Tortonian deep marine resedimented conglomerates and sandstones. These deposits represent part of the infill of a middle-upper Miocene foredeep. Reservoir rocks are now thrusted, eroded, and unconformably overlain by lower Pliocene shales, which are the most important seal in this part of the field. In the southern part of the field is a combination trap. Reservoir rocks are upper Tortonian shallow-water sandstones. They lap onto a Tortonian unconformity related to a tectonic phase which split the previous foredeep into minor piggyback basins. The upper Tortonian sandstones are overlain and sealed by Messinian shales and evaporites. Tectonosedimentary evolution of the area and, consequently, areal distribution and geometry of sedimentary bodies - both potential reservoirs and seals - have been reconstructed using a sequence stratigraphy approach. The sedimentary record has been informally subdivided into five main depositional sequences bounded by unconformities or their correlative conformities; classic facies analysis and petrophysical, seismic, and biostratigraphic data have been utilized to define the internal characteristics of each sequence.

  19. Lunar far side sample return missions using the Soviet Luna system

    NASA Technical Reports Server (NTRS)

    Roberts, P. H., Jr.

    1977-01-01

    The paper assesses the feasibility of using the Soviet Lunar Sample Return vehicle in cooperation with the United States to return a sample of lunar soil from the far side of the moon. Analysis of the orbital mechanics of the Luna system shows how landing sites are restricted on the moon. The trajectory model is used to duplicate the 3 Luna missions flown to date and the results compared to actual Soviet data. The existence of suitable trajectories for the earth return trip is assessed, including landing dispersions at earth. Several possible areas of technical difficulty are identified.

  20. Selection of Luna-25 landing sites in the South Polar Region of the Moon

    NASA Astrophysics Data System (ADS)

    Djachkova, M. V.; Litvak, M. L.; Mitrofanov, I. G.; Sanin, A. B.

    2017-05-01

    The paper presents a brief description of the spatial analysis method developed at the Space Research Institute of the Russian Academy of Sciences for the landing site selection on the Moon's surface for the Luna-25 lander. Preconditions for the selection of the South Polar Region of the Moon as the main exploration area using automatic spacecraft are considered. The main characteristics of the Luna-25 lander and the main factors influencing the landing site selection on the Moon's surface are listed. The data used are described. Eleven landing site candidates obtained by the method are proposed and prioritized. Detailed characteristics are given for the three optimal sites.

  1. Histological location of myxosporean plasmodia in fish tissue with Luna's method.

    PubMed

    Katoch, Anu; Kaur, Harpreet

    2016-10-01

    In the present study, a staining technique, Luna's method, has been used for detection and tissue location of myxosporean spores/plasmodia in histological sections of gills and liver. The Luna's staining was performed on the sections of the tissue fixed in Bouin's, embedded in paraffin wax. The mature plasmodia were stained in bright red color and pansporoblasts and gill tissue stained in blue. This staining helped to detect and locate even a single myxospore of less than 15 μm in size located within the tissues of the host.

  2. FMR and magnetic studies of Luna 24 soils and greater than 1 mm soil particles

    NASA Technical Reports Server (NTRS)

    Morris, R. V.

    1978-01-01

    Six Luna 24 soils (24077, 24109, 24149, 24174, 24182, 24210), their grain-size separates, and twenty-five greater than 1 mm soil particles were analyzed by ferromagnetic resonance (FMR) and static magnetic techniques. The values of the FMR maturity index for the soils ranged from 19.0 to 39.0 units; soils 24077 and 24109 are submature and soils 24149, 24174, 24182, and 24210 are immature. The metallic iron contents of the soils ranged from 0.30 to 0.51 wt % and are commensurate with their maturities. The 'best estimate' value for the concentration of metallic iron of Luna 24 mare basalts is 0.038 wt %.

  3. Cartographic and geodetic methods to characterize the potential landing sites for the future Russian missions Luna-Glob and Luna-Resurs

    NASA Astrophysics Data System (ADS)

    Karachevtseva, I. P.; Kokhanov, A. A.; Konopikhin, A. A.; Nadezhdina, I. E.; Zubarev, A. E.; Patratiy, V. D.; Kozlova, N. A.; Uchaev, D. V.; Uchaev, Dm. V.; Malinnikov, V. A.; Oberst, J.

    2015-04-01

    Characterization of the potential landing sites for the planned Luna-Glob and Luna-Resurs Russian missions requires cartographic and geodetic support prepared with special methods and techniques that are briefly overviewed here. The data used in the analysis, including the digital terrain models (DTMs) and the orthoimages acquired in the survey carried out from the Lunar Reconnaissance Orbiter and Kaguya spacecraft, are described and evaluated. By way of illustration, different regions of the lunar surface, including the subpolar regions of the Moon, are characterized with the suggested methods and the GIS-technologies. The development of the information support for the future lunar missions started in 2011, and it is now carried on in MIIGAiK Extraterrestrial Laboratory (MExLab), which is a department of the Moscow State University of Geodesy and Cartography (MIIGAiK).

  4. Investigations of Moon Polar Regions from Luna-Resource and Luna-Glob Landers - Science Instruments and Operational Plan on Surface

    NASA Astrophysics Data System (ADS)

    Tretyakov, V.; Mitrofanov, I.; Litvak, M.; Malakhov, A.; Mokrousov, M.

    2012-04-01

    Scientific goals for Landers of Luna-Resource and Luna-Glob missions will be presented. Both project aimed on search for volatiles and water ice in upper layer of regolith, study structure and content of regolith and investigate of moon's surface exosphere in lunar polar regions. Science devices for payload, which were selected in accordance to the main goals of these missions, will be described. Criteria for potential landing sites selection will be considered: from engineering suitability (flatness and roughness of surface, radio visibility, solar irradiation and so on) and from scientific applicability for these missions. The detailed plan of surface operations during fist moon day will be presented and preliminary plans for sunset and for second and others days will be discussed.

  5. Prototype of the gas chromatograph - mass spectrometer to investigate volatile species in the lunar soil for the Luna-Glob and Luna-Resurs missions.

    NASA Astrophysics Data System (ADS)

    Hofer, L.; Lasi, D.; Tulej, M.; Wurz, P.; Cabane, M.; Cosica, D.; Gerasimov, M.; Rodinov, D.

    2013-09-01

    In preparation for the Russian Luna-Glob and Luna-Resurs missions we combined our compact time-offlight mass spectrometer (TOF-MS) with a chemical pre-separation of the species by gas chromatography (GC). Combined measurements with both instruments were successfully performed with the laboratory prototype of the mass spectrometer and a flight-like gas chromatograph. Due to its capability to record mass spectra over the full mass range at once with high sensitivity and a dynamic range of up to 106 within 1s, the TOF-MS system is a valuable extension of the GC analysis. The combined GC-MS complex is able to detect concentrations of volatile species in the sample of about 2·10^-9 by mass.

  6. [Reproductive phenology of tree species in the Tenosique tropical forest, Tabasco, Mexico].

    PubMed

    Ochoa-Gaona, Susana; Hernández, Isidro Pérez; de Jong, Bernardus H J

    2008-06-01

    Between August 2003 and August 2005 we registered the flowering and fruiting of 75 tree species (341 individual trees) in a tropical rain forest at Tenosique, Tabasco, Mexico. Monthly we checked five transects (500 m long; 5 m wide). To test the homogeneity of flowering and fruiting during the year, and between adjacent months, we applied a chi2 test. The flowering was bimodal, with a highest peak in March and April, coinciding with the dry season, and a second lower peak in July when precipitation is relatively low. The highest number of fruiting tree species occur between May and July, with its peak in May. Each of the most common botanical families showed a particular phenological pattern. Monthly rainfall and the number of species flowering or fruiting were not significantly correlated. This means that trees are flowering and fruiting all year long, with seasonal increases of both phenological phenomena in the dryer periods. We conclude that phenological patterns vary between individuals and between years and are not seasonally correlated. The data we generated are relevant to program the best periods of seed collections according to individual or groups of species, as part of forest management and conservation practices.

  7. Assessment of the levels of DDT and DDE in soil and blood samples from Tabasco, Mexico.

    PubMed

    Torres-Dosal, Arturo; Martinez-Salinas, Rebeca Isabel; Hernandez-Benavides, Diego; Perez-Vazquez, Francisco Javier; Ilizaliturri-Hernandez, Cesar; Perez-Maldonado, Ivan Nelinho

    2012-12-01

    In Mexico, 1,1,1-trichloro-2,2-bis(p-chlorophenyl)ethane (DDT) was used until the year 2000, principally in agriculture and anti-paludal program health campaigns. The southeastern region of Mexico was an important area of malaria, and from 1957 DDT was applied indoors every 6 months, with a coverage of 2 g/m(2). The current study was performed in Tabasco, a Mexican state located in the southeastern region of Mexico. DDT and 1,1-dichloro-2,2-bis(4-chlorophenyl)ethene (DDE) were analyzed by gas chromatography/mass spectrometry. In general, low levels were found in household outdoor samples; the levels of DDT ranged from not detectable to 0.048 mg/kg, and of DDE from 0.001 to 0.068 mg/kg. An important finding was that, in all communities where DDT in blood was analyzed, exposure to DDT was found, indicating both past and present exposure. Although the levels found in this study were lower than other studies in Mexico, there is a need to evaluate whether the people living in the study area are at risk.

  8. Predictors for poststroke outcomes: the Tel Aviv Brain Acute Stroke Cohort (TABASCO) study protocol.

    PubMed

    Ben Assayag, Einor; Korczyn, Amos D; Giladi, Nir; Goldbourt, Uri; Berliner, A Sholmo; Shenhar-Tsarfaty, Shani; Kliper, Efrat; Hallevi, Hen; Shopin, Ludmila; Hendler, Talma; Baashat, Dafna Ben; Aizenstein, Orna; Soreq, Hermona; Katz, Noomi; Solomon, Zahava; Mike, Anat; Usher, Sali; Hausdorff, Jeff M; Auriel, Eitan; Shapira, Itzhak; Bornstein, Natan M

    2012-06-01

    Recent studies have demonstrated that even survivors of mild stroke experience residual damage, which persists and in fact increases in subsequent years. About 45% of stroke victims remain with different levels of disability. Identifying factors associated with poststroke cognitive and neurological decline could potentially yield more effective therapeutic opportunities. We hypothesize that data based on biochemical, neuroimaging, genetic and psychological measures can, in aggregate, serve as better predictors for subsequent disability, cognitive and neurological deterioration, and suggest possible interventions. The Tel-Aviv Brain Acute Stroke Cohort (TABASCO) study is an ongoing, prospective cohort study that will recruit approximately 1125 consecutive first-ever mild-moderate stroke patients. It is designed to evaluate the association between predefined demographic, psychological, inflammatory, biochemical, neuroimaging and genetic markers, measured during the acute phase, and long-term outcome: subsequent cognitive deterioration, vascular events (including recurrent strokes), falls, affect changes, functional everyday difficulties and mortality. This study is an attempt to comprehensively investigate the long-term outcome of mild-moderate strokes. Its prospective design will provide quantitative data on stroke recurrence, the incidence of other vascular events and the evaluation of cognitive, affective and functional decline. Identifying the factors associated with poststroke cognitive and functional decline could potentially yield more effective therapeutic approaches. © 2012 The Authors. International Journal of Stroke © 2012 World Stroke Organization.

  9. Helminth parasites of the tropical gar, Atractosteus tropicus Gill, from Tabasco, Mexico.

    PubMed

    Salgado-Maldonado, Guillermo; Moravec, Frantisek; Cabañas-Carranza, Guillermina; Aguilar-Aguilar, Rogelio; Sánchez-Nava, Petra; Báez-Valé, Rafael; Scholz, Tomás

    2004-04-01

    A total of 8 helminth species were recorded in an examination of 43 tropical gar, Atractosteus tropicus Gill, collected at the Pantanos de Centla Biosphere Reserve, Tabasco, Mexico. The parasite species included 1 adult trematode, 3 metacercariae, 1 cestode, 1 adult nematode, and 2 nematode larvae. Six of these 8 species were rare, with low prevalence (< 17%) and abundance (< 1.0 helminths per examined fish). The larvae of Contracaecum sp. were the most abundant in the sample, constituting 60% of the total helminths (64% prevalence, 3.8 +/- 5.2 abundance), followed by the cestode Proteocephalus singularis, constituting 18% of the worms (30.5% prevalence, 1.1 +/- 3.0 abundance). Species richness, individual parasite abundance, and diversity were low in the infracommunities. The recording of 3 specialist species in the tropical gar confirms that the helminth fauna of gar has an appreciable degree of specificity. This study indicates the importance of ecological determinants of richness in helminth communities of the tropical gar.

  10. [Diversity of insects captured by weaver spiders (Arachnida: Araneae) in the cocoa agroecosystem in Tabasco, Mexico].

    PubMed

    Pérez-de La Cruz, Manuel; Sánchez-Soto, Saúl; Ortíz-García, Carlos F; Zapata-Mata, Raúl; Cruz-Pérez, Aracely de la

    2007-01-01

    The aim of this work was to know the diversity of insects captured by weaver spiders in a plantation of cocoa (Theobroma cacao L.) of 6 ha in the State of Tabasco, Mexico. The study was carried out from July 2004 to June 2005 by means biweekly samples of the insects captured on the spiders webs. The total of 3,041 webs of 54 species of spiders belonging to seven families (Araneidae, Theridiidae, Tetragnathidae, Uloboridae, Pholcidae, Dyctinidae and Linyphiidae) were revised. We found 1,749 specimens belonging to 10 orders of insects, represented by 93 families, the majority of Coleoptera, Diptera and Hemiptera that constituted 74% of the identified families. The biggest number of specimens of all orders was captured by Araneidae, except of Isoptera, whose specimens were captured mainly by the family Theridiidae. The index of diversity (H'), evenness (J') and similarity (Is), applied to know the diversity of families of insects captured among families of spiders, varied from 0.00 to 3.24, 0.00 to 0.81, and 0.04 to 0.522, respectively. We conclude that there is a wide diversity of insects predated by the weaver spiders in the cocoa agroecosystem, and that there are species that can be promising for the biological control of pests.

  11. Use of the paca, Cuniculus paca (Rodentia: Agoutidae) in the Sierra de Tabasco State Park, Mexico.

    PubMed

    Gallina, Sonia; Pérez-Torres, Jairo; Guzmán-Aguirre, Carlos César

    2012-09-01

    Cuniculus paca is widely distributed throughout the Neotropics. Known as the paca, it is the largest rodent in the Mexican tropical forests, and one of the most used as a subsistence species for its meat. Since colonial times, this species has been subject of an unreported hunting pressure. For this reason, the aim of this work was to describe the use of the paca by the inhabitants of the Sierra de Tabasco State Park (STSP) using sampling areas in a matrix of vegetation with different degrees of disturbance, and different types of land use. We included both preserved areas: owing to the presence of large continuous areas of fragmented rainforest and areas that are not preserved, with smaller rainforest fragments and more isolated. To obtain information about paca use, we interviewed 176 people (>18 years old) who live in the STSP. All those interviewed had eaten paca meat, and indicated that this species is most frequently observed in the rainforest during the dry season. Hunting and trapping were the most common ways to obtain pacas, rather than gifting or purchasing, and firearms and dogs are used to hunt them. We estimated that these interviewed group had hunted a total of 488 paca in the year prior to the study.

  12. Treatment of cutaneous leishmaniasis with localized current field (radio frequency) in Tabasco, Mexico.

    PubMed

    Velasco-Castrejon, O; Walton, B C; Rivas-Sanchez, B; Garcia, M F; Lazaro, G J; Hobart, O; Roldan, S; Floriani-Verdugo, J; Munguia-Saldana, A; Berzaluce, R

    1997-09-01

    In Mexico cutaneous leishmaniasis (CL) occurs in 17 of 32 States, and is a serious public health problem. This is a report of treatment of CL patients in the State of Tabasco, Mexico with a localized current field-radio frequency (LCF-RF) device to generate precisely controlled heat as an alternative to prohibitively expensive drug treatment. It was not a controlled clinical trial, but rather an evaluation of the feasibility of this form of treatment for all CL patients encountered in the endemic area. A total of 201 previously diagnosed patients with CL caused by Leishmania mexicana were treated with a portable Thermosurgery LCF-RF generator powered by rechargeable batteries. The ages of the patients ranged from two to 75 years; the sex distribution was 63% males and 37% females. A single device was used in five different municipalities. Lesions were first anesthetized with 1% lidocaine HCl and moistened with normal saline solution. Treatment consisted of a single application that produced 50 degrees C for 30 sec. After four weeks, 122 patients were available for evaluation, of which 95% were totally cured; (even those involving ear cartilage, which respond poorly to antimonials). At eight weeks post-treatment, 191 patients were evaluated, with a total cure rate of 90%. This form of treatment proved to be effective and convenient for use in primary health care facilities in Mexico and has many advantages over traditional forms of therapy.

  13. Microfossil evidence for pre-Columbian maize dispersals in the neotropics from San Andres, Tabasco, Mexico.

    PubMed

    Pohl, Mary E D; Piperno, Dolores R; Pope, Kevin O; Jones, John G

    2007-04-17

    The history of maize (Zea mays L.) is one of the most debated topics in New World archaeology. Molecular and genetic studies indicate that maize domestication took place in tropical southwest Mexico. Although archaeological evidence for the evolution of maize from its wild ancestor teosinte has yet to be found in that poorly studied region, other research combining paleoecology and archaeology is documenting the nature and timing of maize domestication and dispersals. Here we report a phytolith analysis of sediments from San Andrés, Tabasco, that confirms the spread of maize cultivation to the tropical Mexican Gulf Coast >7,000 years ago ( approximately 7,300 calendar years before present). We review the different methods used in sampling, identifying, and dating fossil maize remains and compare their strengths and weaknesses. Finally, we examine how San Andrés amplifies the present evidence for widespread maize dispersals into Central and South America. Multiple data sets from many sites indicate that maize was brought under cultivation and domesticated and had spread rapidly out of its domestication cradle in tropical southwest Mexico by the eighth millennium before the present.

  14. [Hip fracture in older adults: prevalence and costs in two hospitals. Tabasco, Mexico, 2009].

    PubMed

    Quevedo-Tejero, Elsy del Carmen; Zavala-González, Marco Antonio; Hernández-Gamas, Arianna del Carmen; Hernández-Ortega, Hilda María

    2011-01-01

    To determine hip fracture prevalence and direct healthcare costs in elderly users of the reference hospitals of the Mexican Institute of Social Insurance (IMSS by spanish initials) and Mexican Oils (PEMEX by spanish initials), from Villahermosa, Tabasco, Mexico, during 2009. This is a cross-sectional study. The information was based on the registers of surgical interventions and institutional reports of the elderly inpatients who had a registered attention in their institution. Descriptive statistical analysis was performed considering the following variables: age, gender, hip fracture type, occurrence month, direct healthcare cost. Out of 10,765 records of hospitalized elderly, 57 hip fracture cases were found (33 in the IMSS and 24 in PEMEX). Hip fracture prevalence was 0.5%, (IMSS 1.1% and PEMEX 0.3%), being more frequent in women and older than 69. The most frequent fracture type was the femur neck one (78.9%). The estimated cost of healthcare in the hospital per patient was USD 5,803 in the IMSS and USD 11,800 in PEMEX. The hip fracture prevalence was higher in the IMSS users. Estimated healthcare costs per patient were higher than the reported in other institutions of the of the mexican health national system.

  15. Luna 20 - Mineral chemistry of spinel, pleonaste, chromite, ulvospinel, ilmenite and rutile.

    NASA Technical Reports Server (NTRS)

    Haggerty, S. E.

    1973-01-01

    Review of some of the results of a reflection microscopy and electron microprobe study performed on a part of the Luna 20 soil sample designated as the East Coast Consortium aliquot. The study is restricted to analyses of the oxides of Fe, Ti, Mg, Mn, Cr, and Al in this sample. The spinel mineral group, ilmenite and rutile only are discussed.

  16. Luna 20 pyroxenes - Exsolution and phase transformation as indicators of petrologic history.

    NASA Technical Reports Server (NTRS)

    Ghose, S.; Mccallum, I. S.; Tidy, E.

    1973-01-01

    Description of several pyroxene crystals from a small Luna 20 soil sample which show features comparable to those observed in pyroxenes from layered intrusions. The observed characteristics suggest that many of the bronzite and pigeonite crystals found were derived from rocks crystallized from a high level magma chamber in the lunar highland crust.

  17. LSCC Apollo and Luna Soil Analyses: Update of Soil Evolution Model

    NASA Technical Reports Server (NTRS)

    Pieters, C. M.; Taylor, L. A.; McKay, D. S.; Morris, R. V.; Keller, L. P.

    2004-01-01

    The Lunar Soil Characterization Consortium (LSCC) has obtained samples of Luna 16, 20 and 24 soils. Although these particular samples encountered contamination during processing, preliminary results are consistent with previous integrated analyses and expand the soil data to three additional sites.

  18. Luna 24 - Opaque mineral chemistry of gabbroic and basaltic fragments from Mare Crisium

    NASA Technical Reports Server (NTRS)

    Haggerty, S. E.

    1977-01-01

    Spinels and ilmenites are relatively sparse in the Luna 24 gabbro and basalts. Spinel compositions show some affinities to those of spinels in Apollo 12, Apollo 14 and Luna 16 basalts; a characteristic feature is high Al2O3, reaching a maximum of 19.8 wt%. A comparison of spinels in the Luna 24 gabbro with those in other deep-seated lunar intrusive rocks shows a characteristic trend for Fe/Mg. This trend is systematic from gabbro to anorthosite to troctolite and is interpreted to be P-T dependent. Compositions of spinels in the gabbro fall within the Cr/Al trend defined by the spinels of the basalts, but form a Fe/Mg trend parallel to that of the basalts; this relationship suggests that both the gabbro and the basalts are derived from a closely similar source region, with the basalts originating at a slightly greater depth than the gabbro. The spinels in both rock types are considered to have formed at high crustal levels, at low pressures. The Luna 24 data suggest that the compositional discontinuities which exist between chromian spinels and titanian spinels in a large proportion of mare basalts are the result of nucleation of chromian spinels at high crustal levels prior to eruption, and of titanian spinels during melt crystallization at the lunar surface.

  19. The Luna-Glob Candidate Landing Region: Geological Mapping Based on the Lunar Reconnaissance Orbiter Data

    NASA Astrophysics Data System (ADS)

    Abdrakhimov, A. M.; Ivanov, M. A.; Basilevsky, A. T.; Dickson, J. L.; Head, J. W.; Zuber, M. T.; Smith, D. E.; Mazarico, E.; Neish, C. D.; Bussey, D. B. J.

    2012-03-01

    The new regional detailed geologic map was made using recent LRO data for the Luna-Glob mission. The most probable unit that could be sampled by the lander is a feldspathic Imbrian highland plains-forming material, resembling the Cayley Formation.

  20. Nuclear particle tracks and the regolith at the Luna 24 site

    NASA Technical Reports Server (NTRS)

    Crozaz, G.

    1978-01-01

    Track investigations of feldspars and pyroxenes in Luna 24 soils indicate that most of the grains resided within millimeters of the lunar surface. The two deepest samples appear to be less mature than the upper ones. Lack of correlation between tracks, agglutinates, and I sub S/FeO is puzzling and unique.

  1. LSCC Apollo and Luna Soil Analyses: Update of Soil Evolution Model

    NASA Technical Reports Server (NTRS)

    Pieters, C. M.; Taylor, L. A.; McKay, D. S.; Morris, R. V.; Keller, L. P.

    2004-01-01

    The Lunar Soil Characterization Consortium (LSCC) has obtained samples of Luna 16, 20 and 24 soils. Although these particular samples encountered contamination during processing, preliminary results are consistent with previous integrated analyses and expand the soil data to three additional sites.

  2. Cartography and Information Systems for the Luna-Glob Landing Sites

    NASA Astrophysics Data System (ADS)

    Kokhanov, A.; Karachevtseva, I.; Oberst, J.; Zubarev, A.; Robinson, M. S.

    2012-09-01

    We provide cartography and information system support to the LUNA-GLOB mission and assess candidate landing sites [1] on the basis of different available remote sensing data sets. The main goal of our work is to identify science opportunities in the sub-polar areas and to detect possible hazards for any landing spacecraft.

  3. Genotoxicity in child populations exposed to polycyclic aromatic hydrocarbons (PAHs) in the air from Tabasco, Mexico.

    PubMed

    Gamboa, Rodríguez T; Gamboa, Aldeco R; Bravo, Alvarez H; Ostrosky, Wegman P

    2008-12-01

    The economy of the state of Tabasco is based on oil extraction. However, this imposes major effects to the environment and communities. Examples are the Polycyclic Aromatic Hydrocarbons (PAHs) that may be found in the soil, water and sediment of the region. Their volatility makes them available to living beings and results in genotoxic activity. The purpose of this study was to quantify the levels of PAHs in the air at several points in the state, and to analyze their relationship with possible damage to DNA on local inhabitants. Single Cell Gel Electrophoresis Assay (Comet Assay) was applied to peripheral blood lymphocytes of five groups of children between six and 15 years of age. PAH samples were analyzed following US/EPA TO-13-A method. Results indicated the presence in the air of most of the 16 PAHs considered as high priority by EPA, some of which have been reported with carcinogenic activity. Differences (p<0.05) were found between PAHs concentration in the gaseous component and in the particulate component of air samples, with the greatest values for the gaseous component. Greatest PAH concentrations were detected in areas with high oil extraction activities. Children groups from high oil activity areas presented genotoxic damage labeled from moderate to high according to DNA migration from nuclei (Tail Length: 14.2 - 42.14 microm and Tail/Head: 0.97 - 2.83 microm) compared with control group (12.25 and 0.63 microm, respectively). The group with greatest cell damage was located in the area with the greatest oil activity. We conclude that the presence of PAHs in the air may represent a health risk to populations that are chronically exposed to them at high oil activity regions.

  4. Gait measures as predictors of poststroke cognitive function: evidence from the TABASCO study.

    PubMed

    Ben Assayag, Einor; Shenhar-Tsarfaty, Shani; Korczyn, Amos D; Kliper, Efrat; Hallevi, Hen; Shopin, Ludmila; Auriel, Eitan; Giladi, Nir; Mike, Anat; Halevy, Anat; Weiss, Aner; Mirelman, Anat; Bornstein, Natan M; Hausdorff, Jeffrey M

    2015-04-01

    Patients with stroke are at risk for developing cognitive impairment. We tested whether the assessment of balance and gait can enhance the prediction of long-term cognitive outcome in stroke survivors. Participants were patients with first-ever, mild-moderate ischemic stroke or transient ischemic attack from the Tel Aviv Brain Acute Stroke Cohort (TABASCO) study, a large prospective cohort study, who underwent 3-T MRI and were followed for ≥2 years using neurological, neuropsychological, and mobility examinations 6, 12, and 24 months after the index event. Data were available for 298 patients (age: 66.7±9.6 years). Forty-six participants (15.4%) developed cognitive decline (CD) over the 2 years of follow-up. The CD group and cognitively intact group did not differ in their neurological deficits or in their infarct volume or location. Nonetheless, 6 months after stroke, the Timed Up and Go test took longer in those who later developed CD (P<0.001). Additionally, the CD group also had lower Berg Balance Scale scores (P<0.001), slower gait (P<0.001), and fewer correct answers during dual-task walking (P=0.006). Separate analyses of the patients with transient ischemic attack revealed similar results. Multivariate regression analysis showed that Timed Up and Go times >12 s at 6 months after stroke/transient ischemic attack was a significant independent risk marker of CD 24 months after stroke (odds ratio=6.07, 95% confidence interval: 1.36-27.15). These results suggest that measures of balance and gait are significant risk markers of cognitive status 2 years after stroke. Relatively simple, performance-based tests of mobility may enhance the identification of stroke/transient ischemic attack survivors who have an increased risk of developing CD. URL: http://www.clinicaltrials.gov. Unique identifier: NCT01926691. © 2015 American Heart Association, Inc.

  5. [Population fluctuation of Xyleborus ferrugineus and X. affinis (Coleoptera: Curculionidae) in ecosystems of Tabasco, Mexico].

    PubMed

    Rangel, Ricardo; Pérez, Manuel; Sánchez, Saúl; Capello, Silvia

    2012-12-01

    The Scolytinae insects are commonly known as bark or ambrosial beetles because of their feeding habits. Among them, some species restrict their reproductive activity to a host plant or a small number of them, whereas others are highly polyphagous. In order to evaluate the population dynamics of Scolytinae species, populations of Xyleborusferrugineus and X. affinis in ecosystems from Tabasco, Mexico were studied. The study was carried out from November 2010-July 2011, February 2010-January 2011 and 2007. The trapping methods used were alcohol traps, light traps and direct capture on their host plants. A total of 688 specimens ofX ferrugineus and 3 911 specimens of X. affinis were collected. The population dynamics of X. ferrugineus showed low size population in the studied ecosystems, without any marked seasonality. The highest population sizes were recorded both in dry season (March-May) and rainy season (September-December). Unlike the populations of X. ferrugineus, those of X. affinis were more abundant and showed the highest peaks during the rainy seasons (except in May at the Botanical Garden "José Narciso Rovisora"). Alcohol and light traps can be complementary methods for monitoring the populations of these types of insects. They occur most of the year and theirs population dynamics depends on food resources availability as well as environmental factors such as temperature and humidity. Judging by the observed abundance it is suggested that X. affinis has been adapted and exploited resources in a better way than X. ferrugineus in those ecosystems. Correlations between abundance and climatic factors had both positive and negative values. The results reflect the behavior of populations. However, a detail assessment of the biological and abiotic factors that influence the fluctuations of these insects is required.

  6. Genotoxicity in child populations exposed to Polycyclic Aromatic Hydrocarbons (PAHs) in the air from Tabasco, Mexico

    PubMed Central

    Gamboa, Rodríguez T.; Gamboa, Aldeco R.; Bravo, Alvarez H.; Ostrosky, Wegman P.

    2008-01-01

    The economy of the state of Tabasco is based on oil extraction. However, this imposes major effects to the environment and communities. Examples are the Polycyclic Aromatic Hydrocarbons (PAHs) that may be found in the soil, water and sediment of the region. Their volatility makes them available to living beings and results in genotoxic activity. The purpose of this study was to quantify the levels of PAHs in the air at several points in the state, and to analyze their relationship with possible damage to DNA on local inhabitants. Single Cell Gel Electrophoresis Assay (Comet Assay) was applied to peripheral blood lymphocytes of five groups of children between six and 15 years of age. PAH samples were analyzed following US/EPA TO-13-A method. Results indicated the presence in the air of most of the 16 PAHs considered as high priority by EPA, some of which have been reported with carcinogenic activity. Differences (p<0.05) were found between PAHs concentration in the gaseous component and in the particulate component of air samples, with the greatest values for the gaseous component. Greatest PAH concentrations were detected in areas with high oil extraction activities. Children groups from high oil activity areas presented genotoxic damage labeled from moderate to high according to DNA migration from nuclei (Tail Length: 14.2 – 42.14 μm and Tail/Head: 0.97 – 2.83 μm) compared with control group (12.25 and 0.63 μm, respectively). The group with greatest cell damage was located in the area with the greatest oil activity. We conclude that the presence of PAHs in the air may represent a health risk to populations that are chronically exposed to them at high oil activity regions. PMID:19151429

  7. [Histology of reproductive cycle of tropical gar Atractosteus tropicus females (Lepisosteiformes: Lepisosteidae) in Tabasco, Mexico].

    PubMed

    Méndez-Marin, Otilio; Hernández Franyutti, Arlette Amalia; Alvarez-González, Carlos Alfonso; Contreras-Sánchez, Wilfrido Miguel; Uribe Aranzábal, Mari Carmen

    2012-12-01

    In Southeast Mexico, A. tropicus is a species with great ecological, economic, cultural and aquaculture value, however wild populations have diminished due to diverse anthropological causes. The objective of this study was to characterize the reproductive cycle of A. tropicus, with a description of complete gonad structure and the changes in germinal and somatic elements during oogenesis, for better management and use of this species. Six sexually mature females (N=72) were captured monthly with drag nets during one year cycle (October 2003-October 2004) in wild populations of Pomposu lagoon, municipality of Jalpa de Mendez, Tabasco, Mexico. Females were sacrificed by decapitation and the ovaries were processed by standard histological methods; the diameter of 10-20 oocytes taken at random was determined in different stages of development. Gonadosmatic index (GSI), gonadal volume (gV) and follicule diameter (fD) were determined monthly. Among results we could determine eight oogenesis developmental stages: I: chromatin nucleolus stage, II: early perinucleolus stage, III: mid perinucleolus stage, IV: advanced perinucleolus stage, V: early vitellogenesis stage, VI: mid vitellogenesis stage, VII) advanced vitellogenesis stage and VIII: final maturation stage. The reproductive cycle could be divided in four phases: 1: proliferative phase, II: initial maturation phase, III: late maturation phase, IV: regressing phase. Analysis of the data obtained from the IGS, gV and fD values, oogenesis stages and reproductive phases, indicate that in December previtellogenesis phase restarts, from March through July yolk deposition (vitellogenesis) occurs, and from August to November the maximum reproductive activity takes place. Contrasting this pattern with local environmental factors such as temperature and precipitation, we suggested that these may serve as an environmental activator in the development of oogenesis and spawning of this species.

  8. Luna 16 - An opaque mineral study and a systematic examination of compositional variations of spinels from Mare Fecunditatis.

    NASA Technical Reports Server (NTRS)

    Haggerty, S. E.

    1972-01-01

    The opaque mineralogy of the Luna 16 soil sample is studied, with an emphasis on a detailed survey of the compositional variations of the Fe-Ti-Cr-Al-Mg spinels. Analytical data are also presented for ilmenite. Textural characteristics and shock-metamorphic effects on the opaque minerals are briefly described and comparisons are made throughout between the Luna 16 samples and published and unpublished data on the Apollo samples.

  9. Luna 16 - An opaque mineral study and a systematic examination of compositional variations of spinels from Mare Fecunditatis.

    NASA Technical Reports Server (NTRS)

    Haggerty, S. E.

    1972-01-01

    The opaque mineralogy of the Luna 16 soil sample is studied, with an emphasis on a detailed survey of the compositional variations of the Fe-Ti-Cr-Al-Mg spinels. Analytical data are also presented for ilmenite. Textural characteristics and shock-metamorphic effects on the opaque minerals are briefly described and comparisons are made throughout between the Luna 16 samples and published and unpublished data on the Apollo samples.

  10. Age of Giordano Bruno crater as deduced from the morphology of its secondaries at the Luna 24 landing site

    NASA Astrophysics Data System (ADS)

    Basilevsky, A. T.; Head, J. W.

    2012-12-01

    We undertook a photogeologic study of Lunar Reconnaissance Orbiter Camera (LROC) Narrow Angle Camera (NAC) images of the ejecta of the very young 22-km diameter crater Giordano Bruno (GB) and for the Luna 24 landing site region, where secondary craters from Giordano Bruno are observed. Using the technique of Basilevsky (1976) for estimating the absolute ages of small lunar craters based on their morphologic prominence and size, craters near the Luna 24 site considered to be secondaries of Giordano Bruno crater and craters superposed on ejecta of Giordano Bruno crater are found to have approximately the same age: somewhere between 5 and 10 m.y. This suggests that the craters at the Luna 24 site are indeed secondaries of GB crater and that this age range is an estimate for the time of GB crater formation. Our results generally agree with estimates derived from counts of small craters superposed on GB ejecta: 1-10 m.y. and with the exposure age of one of the samples derived from Zone I of the Luna 24 core. Plescia et al. (2010b) interpreted a large fraction of the craters superposed on GB ejecta and floor not as primary craters, but rather as secondary craters formed from the GB event itself. On this basis, it was postulated that GB may be formed by an historic impact. Our new data and analysis do not support an age as young as historical. The general agreement of our results for age determination for the GB secondaries of the Luna 24 area, and for craters superposed on the GB ejecta, with the age estimate based on crater count and with the mentioned exposition age of one of the Luna 24 samples, also validates the technique of Basilevsky (1976). A special study of the Luna 24 samples should be undertaken designed to find records of the formation age of the crater on whose rim Luna 24 landed, thus better constraining the age of GB crater.

  11. Evaluation of the Nfocus LUNA, a new parent vessel occlusion device: a comparative study in a canine model.

    PubMed

    Turk, Aquilla S; Turner, Raymond D; Chaudry, M Imran

    2011-09-01

    Parent artery occlusion is sometimes required to treat cerebrovascular lesions. We evaluated the Nfocus LUNA parent vessel occlusion (PVO) device in comparison with the Vascular Plug (AVP) used in the peripheral vasculature for large-vessel occlusion in a canine animal model. The subclavian arteries were targeted for occlusion in 7 canines. Each animal received 1 LUNA and 1 AVP device sequentially rotated between the left and right subclavian arteries. Angiographic assessment was performed serially after device placement until vessel occlusion was observed and then again immediately before the animal was killed. Three animals were euthanized at 1 month and 4 at 2 months post-implantation, after which the native artery segments containing the implanted device were harvested and preserved for subsequent histological analysis. The LUNA PVO device and the AVP were accurately positioned and deployed in all cases. Acute occlusion times for the devices were not statistically different. In no instance was there any evidence of device migration. At 28 and 55 days, the LUNA implants showed nearly complete occlusion with small recanalization channels, whereas the AVP devices were associated with low occlusion levels and large residual vascular channels within the occluder. The LUNA PVO device and delivery system can be accurately placed to occlude vessels without migration and with a performance that is similar to the AVP. The LUNA PVO device on average provided a higher degree of occlusion durability at both 1 and 2 months.

  12. [Somatometry in full-term newborns in Villahermosa, Tabasco, Mexico. Study of a middle-class population].

    PubMed

    Jiménez-Balderas, E A; Sabino Osorio-Pérez, R; Huerta-Muñoz, V; Quijano de la Cruz, A

    1991-03-01

    Realize a somatometric study in the Tabasco zone and compared this results with a similar study. Full term newborns without patology take weight, height and head circumference. In Villahermosa City, Capital of Tabasco State in México, from march 1, 1988 to january 31, 1989. 915 fullterm newborn, male 450, female 465, from the patients of Instituto Mexicano del Seguro Social (Social Security System). The average weight in male was 3,290 g, with standard deviation (SD) 358 g, in female 3,130, SD 343 g (P less than 0.01); height in male 50.2, SD 1.3 cm, female 49.8, SD 1.3 cm (P less than 0.01); head circumference in male 34.7, SD 1.5 cm, female 34.5 SD 1.5 cm (P: without significance). We make our own percentiles. We found stadistic significance between both sexes; we don't found between another study; when we compared our work with others in past decades, observed the improved obtained by the people in our country.

  13. [Gonadic cycle of the American oyster Crassostrea virginica (Lamellibranchia: Ostreidae) in Mecoacán, Tabasco, México].

    PubMed

    George-Zamora, Arturo; Sevilla-Hernández, Ma Luisa; Aldana-Aranda, Dalila

    2003-06-01

    The American oyster Crassostrea virginica is exploited along Gulf of Mexico. This resource represents a job source and incomes for fishermen. In Mexico the production is supported by Tabasco state, the first producer. However, the mexican landings of this bivalve had been dropped about 40% last ten years. By 1999, Tabasco presents a unique ban season fishery of oysters. This season was based in evaluation of gonadal development by visual observations of color and texture, larvae and seeds abundance. In 2000, the government set up two ban seasons in terms of evaluation of populations every year, without gonadal analysis. In general, exists different spawning seasons for American oyster, in accordance with the environmental conditions. It is necessary to establish a ban season according to reproductive cycle. This study presents the gonadic cycle for an oyster population of Mecoacin lagoon along a year. It was defined five phases of the gonad development: resting, gametogenesis, mature or ripe, spawn and post spawn. Gametogenesis is present all the year, except December. The spawning activity was detected all year, except July and August. The ripe phase presented maximum values in August and December. It was proposed a modification of the ban seasons from April 15 - May 30, and September 15 - October 30 to March 15 - May 15 and September 1 - October 30, respectively, according to gonadic cycle obtained in this work. This modification would to avoid capture mature organisms (ready to spawn).

  14. Shock metamorphic effects in the Luna 16 soil sample from Mare Fecunditatis.

    NASA Technical Reports Server (NTRS)

    French, B. M.

    1972-01-01

    Diverse lunar soil fragments returned from the Luna 16 mission were examined for evidence in shock metamorphism in order to evaluate the role of meteorite impact in forming the lunar regolith at a new site relatively distant from the Apollo landing sites. It was found that shock metamorphic effects, characteristic of meteorite impact and virtually identical to those observed in Apollo samples, are common in the Luna 16 fragments. Two types of shock effects are present - i.e., a deformation and partial melting features in rock and mineral fragments, and heterogeneous glasses and glassy breccias produced by shock melting. It is concluded that these shock metamorphic effects indicate that regolith formation by meteorite impact has occurred in Mare Fecunditatis and is a general process over the entire moon.

  15. Luna 24: 90-150 micrometer fraction - Implications for remote sampling of regolith

    NASA Technical Reports Server (NTRS)

    Papp, H. A.; Steele, I. M.; Smith, J. V.

    1978-01-01

    An analysis of the mineral grains and glasses found in the 90 to 150 micron fraction of the Luna 24 core sample is presented and implications for the automatic collection of planetary and asteroidal regoliths are discussed. Electron microprobe analysis for pyroxene, olivine, plagioclase, opaque minerals and glass in samples at various depths indicate that polymineralic grains have compositions similar to those of gabbroic and basaltic fragments from coarser samples, while monomineralic grains contain an additional population of Mg-rich olivines and pyroxene. Most of the glasses are found to be related to mare basalts or local regolith, with nonmare material represented by glasses of highland basalt and low K Fra Mauro composition. It is concluded that as regards mineralogy and petrology, a single grab sample would have been as useful and a series of grab samples on a long traverse would have been more useful than the Luna 24 core sample, with the fine sample being more informative than the coarse.

  16. The lunar regolith - Chemistry and petrology of Luna 24 grain size fractions

    NASA Technical Reports Server (NTRS)

    Laul, J. C.; Rode, O. D.; Simon, S. B.; Papike, J. J.

    1987-01-01

    Chemical data obtained by instrumental neutron activation analysis are reported for 30 elements in eight lunar soil size fractions from 370 to less than 2 microns, as well as petrology for five size fractions down to 40-10 microns in two Luna 24 soils. While the compositions of coarser fractions are similar to each other, they differ from the fractions smaller than 10 microns; these become increasingly feldspathic and enriched in large ion lithophile elements (LILE) with decreasing grain size. The high concentrations of the Ni, Au and Ir meteoritic indicator elements in these finer fractions are consistent with comminution by meteoritic impact. Size distributions, petrology and LILE patterns indicate that Luna 24 soils are less reworked than most lunar soils.

  17. Human cytomegalovirus IE72 protein interacts with the transcriptional repressor hDaxx to regulate LUNA gene expression during lytic infection.

    PubMed

    Reeves, Matthew; Woodhall, David; Compton, Teresa; Sinclair, John

    2010-07-01

    A putative latency-associated transcript (LUNA) complementary to the human cytomegalovirus (HCMV) UL81-82 region previously identified in seropositive donors' monocytes is also expressed during lytic infection. Thus, the LUNA promoter is active during both lytic and latent infection. Consequently, the mechanisms regulating this promoter may provide further insight into factors that determine whether the outcome of HCMV infection is latent or lytic. By transfection, the LUNA promoter exhibited low but reproducible activity. Substantial activation by virus infection suggested that a viral factor was important for LUNA expression during lytic infection. IE72, a known transactivator of viral promoters, activated the LUNA promoter in cotransfection assays. Furthermore, coinfection with wild-type HCMV but not an IE72 deletion virus (CR208) also activated the LUNA promoter. Finally, diminished LUNA gene expression in CR208 virus-infected cells supported a role for IE72 in LUNA gene expression. The initial regulation of herpesvirus immediate-early gene expression is associated with proteins found at cellular nuclear domain 10 (ND10) bodies, such as PML, hDaxx, and ATRX. hDaxx transfection repressed LUNA promoter activity. Furthermore, we observed binding of hDaxx to the LUNA promoter, which was abrogated by IE72 gene expression via direct interaction. Finally, we show that small interfering RNA (siRNA) knockdown of the hDaxx interaction partner ATRX rescued LUNA gene expression in CR208-infected cells. Overall, these data show that hDaxx/ATRX-mediated repression of LUNA during lytic infection absolutely requires IE72 gene expression. It also suggests that the targeting of cellular factors by IE72 is important throughout the different phases of HCMV gene expression during productive infection.

  18. Soil mechanics results of Luna 16 and Lunokhod 1: A preliminary report

    NASA Technical Reports Server (NTRS)

    Johnson, S. W.; Carrier, W. D., III

    1971-01-01

    The physical and mechanical properties of the lunar soil, as determined by Luna 16 and Lunokhod 1 experiments, are discussed. Data are included for interactions between vehicle wheels and the lunar soil, compressibility, resistance to penetration, and friction characteristics of the soil. The shear strength of the returned lunar soil for various bulk densities is also examined. Several potential spacecraft materials were tested in contact with lunar soil to determine their friction and wear characteristics.

  19. Determination of rare-earth elements in Luna 16 regolith sample by chemical spectral method

    NASA Technical Reports Server (NTRS)

    Stroganova, N. S.; Ryabukhin, V. A.; Laktinova, N. V.; Ageyeva, L. V.; Galkina, I. P.; Gatinskaya, N. G.; Yermakov, A. N.; Karyakin, A. V.

    1974-01-01

    An analysis was made of regolith from layer A of the Luna 16 sample for rare earth elements, by a chemical spectral method. Chemical and ion exchange concentrations were used to determine the content of 12 elements and Y at the level 0.001 to 0.0001 percent with 10 to 15 percent reproducibility of the emission determination. Results within the limits of reproducibility agree with data obtained by mass spectra, activation, and X-ray fluorescent methods.

  20. Determination of rare-earth elements in Luna 16 regolith sample by chemical spectral method

    NASA Technical Reports Server (NTRS)

    Stroganova, N. S.; Ryabukhin, V. A.; Laktinova, N. V.; Ageyeva, L. V.; Galkina, I. P.; Gatinskaya, N. G.; Yermakov, A. N.; Karyakin, A. V.

    1974-01-01

    An analysis was made of regolith from layer A of the Luna 16 sample for rare earth elements, by a chemical spectral method. Chemical and ion exchange concentrations were used to determine the content of 12 elements and Y at the level 0.001 to 0.0001 percent with 10 to 15 percent reproducibility of the emission determination. Results within the limits of reproducibility agree with data obtained by mass spectra, activation, and X-ray fluorescent methods.

  1. Clast-laden nature and the origin of Luna 24 olivine-vitrophyres

    NASA Technical Reports Server (NTRS)

    Basu, A.; Mckay, D. S.; Fruland, R. M.

    1978-01-01

    The study shows that Luna 24 olivine-vitrophyric particles are actually fragments of clast-laden melt and are not from a very low titanium (VLT) mare basalt flow. Diversity of composition and clast population, and morphological similarity to ropy glasses suggest an impact melt origin. Compositionally, the olivine-vitrophyres resemble the high magnesian VLT basalts, which may have been the target and source of the impact melt.

  2. A global scale mechanistic model of photosynthetic capacity (LUNA V1.0)

    NASA Astrophysics Data System (ADS)

    Ali, A. A.; Xu, C.; Rogers, A.; Fisher, R. A.; Wullschleger, S. D.; Massoud, E. C.; Vrugt, J. A.; Muss, J. D.; McDowell, N. G.; Fisher, J. B.; Reich, P. B.; Wilson, C. J.

    2016-02-01

    Although plant photosynthetic capacity as determined by the maximum carboxylation rate (i.e., Vc, max25) and the maximum electron transport rate (i.e., Jmax25) at a reference temperature (generally 25 °C) is known to vary considerably in space and time in response to environmental conditions, it is typically parameterized in Earth system models (ESMs) with tabulated values associated with plant functional types. In this study, we have developed a mechanistic model of leaf utilization of nitrogen for assimilation (LUNA) to predict photosynthetic capacity at the global scale under different environmental conditions. We adopt an optimality hypothesis to nitrogen allocation among light capture, electron transport, carboxylation and respiration. The LUNA model is able to reasonably capture the measured spatial and temporal patterns of photosynthetic capacity as it explains ˜ 55 % of the global variation in observed values of Vc, max25 and ˜ 65 % of the variation in the observed values of Jmax25. Model simulations with LUNA under current and future climate conditions demonstrate that modeled values of Vc, max25 are most affected in high-latitude regions under future climates. ESMs that relate the values of Vc, max25 or Jmax25 to plant functional types only are likely to substantially overestimate future global photosynthesis.

  3. A global scale mechanistic model of photosynthetic capacity (LUNA V1.0)

    DOE PAGES

    Ali, A. A.; Xu, C.; Rogers, A.; ...

    2016-02-12

    Although plant photosynthetic capacity as determined by the maximum carboxylation rate (i.e., Vc, max25) and the maximum electron transport rate (i.e., Jmax25) at a reference temperature (generally 25 °C) is known to vary considerably in space and time in response to environmental conditions, it is typically parameterized in Earth system models (ESMs) with tabulated values associated with plant functional types. In this study, we have developed a mechanistic model of leaf utilization of nitrogen for assimilation (LUNA) to predict photosynthetic capacity at the global scale under different environmental conditions. We adopt an optimality hypothesis to nitrogen allocation among light capture, electron transport,more » carboxylation and respiration. The LUNA model is able to reasonably capture the measured spatial and temporal patterns of photosynthetic capacity as it explains  ∼  55 % of the global variation in observed values of Vc, max25 and  ∼  65 % of the variation in the observed values of Jmax25. Model simulations with LUNA under current and future climate conditions demonstrate that modeled values of Vc, max25 are most affected in high-latitude regions under future climates. ESMs that relate the values of Vc, max25 or Jmax25 to plant functional types only are likely to substantially overestimate future global photosynthesis.« less

  4. The LunaRace - a public outreach, involvement, education and support mission

    NASA Astrophysics Data System (ADS)

    Spitzl, H.; Bouquet, F.; Arafune, K.; Contino, M.-C.; Fontaine, T. H.; Freihoefer, J.; Grey, I.; Leindecker, W.; Lintchik, E.; Meierink, G.; Pauly, K.; Shen, Z.; Simi, N.; Summerer, L.; Weinmann, G.; Yoon, J.

    2002-10-01

    Today's level of technology allows for many fantastic missions to space. Funding of these missions is a problem, because government are cutting space budgets and commercial expenditure in space is minimal. The major obstacle to achieving global involvement into large scale, economically viable space enterprises is the lack of public involvement, education and support. At the 1999 Summer Session of the International Space University, the LunaRace (LR) mission has been desgined. With its extensive public outreach program before, during and after the race, this mission could be the first to bridge the gap between space and public. In national and international design contests, the most promising rover designs will be selected. Similar to the Tour de France and Paris-Dakar, the LR will be a staged event from the Apollo 17 to the Luna 21 landing site and back, during one Lunar Day. During the remaining sunlight after the race the surviving rovers will be used for public outreach purposes. This LunaRace will be a stepping stone for future human space exploration beyond low Earth orbit. Next to the technology pull it implies, it has a high chance of boosting public support and education that brings the institution of commercially viable space enterprises a step closer.

  5. Searching for Crisium Basin ejecta - Chemistry and ages of Luna 20 impact melts

    NASA Technical Reports Server (NTRS)

    Swindle, T. D.; Spudis, P. D.; Taylor, G. J.; Korotev, R. L.; Nichols, R. H., Jr.

    1991-01-01

    Chemical (INAA) and chronological (Ar-40 - Ar-39) analyses of six Luna 20 impact melts are performed, and these are compared to the results of Podosek et al. (1973), commonly taken to be representative of the Crisium Basin impact. At least two chemical groups of impact melts are identified. One is interpreted as melts derived from the local crust by craters over the last 3.9 Ga. Another group, which includes one of the samples dated by Podosek et al. (1973), is chemically and chronologically (3.85 + or - 0.02 Ga) indistinguishable from Apollo 17 samples interpreted as Serenitatis impact melts, and hence could be melt formed by that event and deposited at the Luna 20 site. One sample (22023,3,F) has a well-defined age of 3.895 + or - 0.017 Ga, and is chemically similar to, but distinct from, impact melts from other basins. This sample, and its chemistry and age are tentatively identified with the Crisium Basin impact. Whether the age of the Crisium impact is given by 22023,3,F, the samples analyzed by Podosek et al. (1973), or neither, it is clear that Crisium impact melt is not abundant in the Luna 20 collection.

  6. The lunar regolith - Comparative studies of the Apollo and Luna sites. Petrology of soils from Apollo 17, Luna 16, 20, and 24

    NASA Technical Reports Server (NTRS)

    Simon, S. B.; Papike, J. J.; Laul, J. C.

    1982-01-01

    A progress report is presented concerning an investigation involving a comprehensive chemical and petrologic study of surface soils from all nine lunar sampling sites. The soils selected for this study are part of the lunar highlands soils suite and represent the soils at each site that contain abundant highland-derived material. The current report takes into consideration, in addition to the eight soils discussed by Labotka et al. (1980) and by Laul and Papike (1980), three Apollo 17 soils (72501, 76501, and 78221), and three Luna soils (21000, L-16; 22001, L-20; and 24999, L-24). Attention is given to the modal petrology of the 1000-90 micrometer fraction of all 14 soils, and the modes and mineral and glass chemistries of the 90-20 and 20-10 micrometer fractions of the Apollo 17 and Luna soils. In an evaluation of the obtained results, it is found that except for rare, large-scale impacts, lateral mixing is an inefficient process. Comminution and vertical mixing appear to be the dominant process.

  7. Embryonic and larval development of Eugerres mexicanus (Perciformes: Gerreidae) in Tenosique, Tabasco, Mexico.

    PubMed

    Hernández, Raúl E; Perera, Martha A; Castillo, Alfonso; Luna, Emiliano; de la Cruz, José A; Gómez, Luis M; Valdez Zenil, José

    2012-03-01

    Most studies on Eugerres mexicanus mainly consider biogeographic and systematic aspects and rarely address reproductive characteristics, which are useful for fishery population management plans. This study aimed at evaluating the ontogeny of E. mexicanus, based on 30 embryos and 30 larvae sampled by induced spawning of breeders, taken in February 2009 from the Usumacinta River in Tenosique, Tabasco, Mexico. All descriptions of the embryonic development were based on morphometric and meristic data and followed standard methods. Eggs, recovered at the gastrula stage, had an average diameter of 1.17mm (SD=0.08). The bud stage appeared during the first three hours of development, in which the posterior side was adhered to the vitellus; Kupffer's vesicle was visible. Yolk-sac larvae hatched 18 hours after fertilization, exhibiting a light brown color and an average total length of 2.94mm (SD=0.70); the preflexion stage was reached eight days after hatching, with a total average length of 4.67mm (SD=0.50) and a total notochord length of 4.45mm (SD=0.50). The flexion stage was reached on the 16th day, with an average total length of 6.66mm (SD=1.53), while postflexion was reached on the 24th day, with 10.33mm (SD=1.45). The pre-juvenile stage was reached on the 33rd day, with a total length of 14.30mm (SD=0.93), showing IX spines and 10 rays and III spines and eight rays in the dorsal and anal fins, respectively. The juvenile stage was reached by the 45th day, with an average length of 28.16mm (SD=1.93) and average weight of 4.75g (SD=1.49). Prejuveniles showed an initial pigmentation with dark colored dots in the superior and inferior jaw and dispersed on the head, while juveniles presented the same pigmentation pattern, decreasing towards the margin of the caudal peduncle. In conclusion, the embryonic developmental stages of E. mexicanus were typical for the Gerreidae group. However, their morphometric characters were slightly different since the diameter and size of

  8. Chronology of wrinkle ridge formation and rate of crustal shortening on Lunae Planum, Mars

    NASA Astrophysics Data System (ADS)

    Karagoz, Oguzcan; Aksoy, M. Ersen; Erkeling, Gino

    2017-04-01

    The Lunae Planum, a plain between the Tharsis Montes and the Acidalia Planitia on Mars, represents a transitional zone from a volcanic rise to a lowland plain, respectively. From West to East at N20°, topography changes from 600 m to -750 m. Here, several wrinkle ridges that are compressional tectonic features formed by folding and thrust faulting [1], mark the surficial deformation of the martian crust. From the analysis of >25 wrinkle ridges in earlier studies a total shortening of ˜1840 m and a compressive strain of 0.29% has been suggested for the Lunae Planum [2]. In this study, we investigate the chronological order of geomorphic structures and determine the timing and duration of the crustal shortening of Lunae Planum. We use remote sensing mapping techniques [3] and crater size-frequency distribution measurements (CSFD) [e.g.,4,5]. In our analyses, we use HRSC (12.5 m/pixel), CTX (6 m/pixel) and HiRISE (0.3 m/pixel) satellite images and digital terrain models to document geomorphic structures such as wrinkles ridges, impact craters, crater ejecta blankets and intermontane plains. Our CSFD measurements of wrinkle ridges reveal an age distribution from 3.9 Ga to 3.0 Ga, with surfaces getting younger towards the East. Our findings are in accordance with earlier observations of greater shortening amounts towards the West (in older ridges) [2]. The age distribution of wrinkle ridges suggests a 9 Ma time interval for the proposed 1840 m horizontal shortening at a deformation rate of 2.04 x 10-3 mm/yr for compressional deformation on the Lunae Planum. [1] Watters, T.R., 2004, Elastic dislocation modeling of wrinkle ridges on Mars, Icarus, 171, 284-294. [2] Plescia, J.B., 1991.Wrinkle ridges in Lunae Planum, Mars: implications for shortening and strain. Geophys. Res. Lett. 18, 913-916. [3] Greeley, R. and Guest, J.E., 1987. Geologic map of the eastern equatorial region of Mars. USGS Miscellaneous Investigations Series Map. [4] Hartmann, W. K., and Neukum, G

  9. Hematology and serum biochemistry comparison in wild and captive Central American river turtles (Dermatemys mawii) in Tabasco, Mexico.

    PubMed

    Rangel-Mendoza, Judith; Weber, Manuel; Zenteno-Ruiz, Claudia E; López-Luna, Marco A; Barba-Macías, Everardo

    2009-10-01

    Hematological and serum biochemistry analyses were determined on 51 Central American river turtles (Dermatemys mawii) during the dry and rainy seasons of 2006. Turtles came from two sites: Pantanos de Centla Biosphere Reserve and a turtle breeding farm, both located in Tabasco State, Mexico. Physical examination and body measures of animals were performed. Incidence and prevalence of hemoparasites were explored. Captive organisms were in poor physical condition while wild turtles were apparently healthy. There were differences in several hematological parameters related with the condition and the season. During the dry season captive turtles exhibited higher levels of uric acid and urea, as well as lower levels of glucose. Haemogregarina sp. was detected in 100% of the wild individuals, but not in captive individuals. Its incidence was greater during the rainy season. This is the first health assessment and hematology study of this critically endangered species.

  10. The lunar regolith - Comparative studies of the Apollo and Luna sites. Chemistry of soils from Apollo 17, Luna 16, 20, and 24

    NASA Technical Reports Server (NTRS)

    Laul, J. C.; Papike, J. J.; Simon, S. B.

    1982-01-01

    The present investigation represents an extension of a comparative regolith study reported by Labotka et al. (1980) to the Apollo 17 site and to the east limb of the moon (Luna 16, 20, and 24 sites). Chemical systematics are considered, taking into account major and minor element characteristics, and large ion-lithophile patterns (K, REE, and Th). Attention is also given to chemical mixing calculations and the significance of the fine fraction. It is found that the chemistries of 1000-90, 90-20, and 20-10 micrometer size fractions are very similar to each other but quite different from the 'less than 10 micrometer' fine fractions. The 'less than 10 micrometer' fine fractions, which comprise about 5 to 20% of the bulk soils, are consistently more feldspathic and enriched in LIL-rich material relative to the coarse fractions in all soils. The KREEP type is different at each site and is largely derived locally.

  11. The lunar regolith - Comparative studies of the Apollo and Luna sites. Chemistry of soils from Apollo 17, Luna 16, 20, and 24

    NASA Technical Reports Server (NTRS)

    Laul, J. C.; Papike, J. J.; Simon, S. B.

    1982-01-01

    The present investigation represents an extension of a comparative regolith study reported by Labotka et al. (1980) to the Apollo 17 site and to the east limb of the moon (Luna 16, 20, and 24 sites). Chemical systematics are considered, taking into account major and minor element characteristics, and large ion-lithophile patterns (K, REE, and Th). Attention is also given to chemical mixing calculations and the significance of the fine fraction. It is found that the chemistries of 1000-90, 90-20, and 20-10 micrometer size fractions are very similar to each other but quite different from the 'less than 10 micrometer' fine fractions. The 'less than 10 micrometer' fine fractions, which comprise about 5 to 20% of the bulk soils, are consistently more feldspathic and enriched in LIL-rich material relative to the coarse fractions in all soils. The KREEP type is different at each site and is largely derived locally.

  12. Luna, a Drosophila KLF6/KLF7, is maternally required for synchronized nuclear and centrosome cycles in the preblastoderm embryo.

    PubMed

    Weber, Ursula; Rodriguez, Estefania; Martignetti, John; Mlodzik, Marek

    2014-01-01

    Krüppel like factors (KLFs) are conserved transcription factors that have been implicated in many developmental processes including differentiation, organ patterning, or regulation of stem cell pluripotency. We report the generation and analysis of loss-of-function mutants of Drosophila Klf6/7, the luna gene. We demonstrate that luna mutants are associated with very early embryonic defects prior to cellularization at the syncytial stage and cause DNA separation defects during the rapid mitotic cycles resulting in un-coupled DNA and centrosome cycles. These defects manifest themselves, both in animals that are maternally homozygous and heterozygous mutant. Surprisingly, luna is only required during the syncytial stages and not later in development, suggesting that the DNA segregation defect is linked to centrosomes, since centrosomes are dispensable for later cell divisions.

  13. Geological context of potential landing site of the Luna-Glob mission

    NASA Astrophysics Data System (ADS)

    Ivanov, M. A.; Abdrakhimov, A. M.; Basilevsky, A. T.; Dixon, J. L.; Head, J. W.; Chick, L.; Vitten, J.; Zuber, M. T.; Simt, D. E.; Mazarico, E.; Neish, C. D.; Bassey, D. B. J.

    2014-11-01

    The region planned for performing the Luna-Glob mission is located in the southern part of the swell surrounding the largest South Pole-Aitken (SPA) basin. The photogeological analysis of the surface topography of this region using the LRO-WAC (resolution of 100 Mpxl) photomaps made it possible to define the following groups of morphological units (area types): (1) related to the formation of relatively fresh impact craters; (2) associated with larger (>100 km across) degraded craters including (2a) external and (2b) inner facies; and (3) occupying intercrater spaces. The comparison of the geological map with the map illustrating the distribution of the epithermal neutron flow (Mitrofanov et al., 2012) shows no correlation between them. Consequently, one should not expect development of rock complexes, which would be characterized by elevated concentrations of water in the region chosen for the Luna-Glob mission and, thus, considered among the first-priority targets. The comparison of the neutron flow distribution with the map of circular polarization of the Mini-RF radar beam also shows no correlation. This means that high values of circular polarization reflect elevated concentrations of rock fragments rather than water accumulations. Even though ice fragments are present, their sizes should only slightly be less as compared with the radar wavelength (12.6 cm). The region planned for investigations in the scope of the Luna-Glob mission corresponds to the swell of the largest (and, likely, oldest) preserved basin and offers a potential opportunity to analyze ancient material of this planet and introduce important constraints into the spectrum of models proposed for explaining the Moon's origin.

  14. Bioinspired micrograting arrays mimicking the reverse color diffraction elements evolved by the butterfly Pierella luna

    PubMed Central

    England, Grant; Kolle, Mathias; Kim, Philseok; Khan, Mughees; Muñoz, Philip; Mazur, Eric; Aizenberg, Joanna

    2014-01-01

    Recently, diffraction elements that reverse the color sequence normally observed in planar diffraction gratings have been found in the wing scales of the butterfly Pierella luna. Here, we describe the creation of an artificial photonic material mimicking this reverse color-order diffraction effect. The bioinspired system consists of ordered arrays of vertically oriented microdiffraction gratings. We present a detailed analysis and modeling of the coupling of diffraction resulting from individual structural components and demonstrate its strong dependence on the orientation of the individual miniature gratings. This photonic material could provide a basis for novel developments in biosensing, anticounterfeiting, and efficient light management in photovoltaic systems and light-emitting diodes. PMID:25288730

  15. The LUNA experiment at Gran Sasso Laboratory: Studying stars by going underground

    SciTech Connect

    Guglielmetti, Alessandra

    2015-10-15

    Accurate knowledge of thermonuclear reaction rates is a key issue in nuclear astrophysics: it is important for understanding the energy generation, neutrino production and the synthesis of the elements in stars and during primordial nucleosynthesis. Cross-section measurements are mainly hampered by the very low counting rate and cosmic background. An underground location is extremely advantageous for such studies, as demonstrated by the LUNA experiment in the Gran Sasso Laboratory (Italy). This paper reports on the results recently obtained by this experiment and on the future perspectives in the field.

  16. X-ray diffraction identification of minerals in lunar regolith returned by Luna 16 automatic station

    NASA Technical Reports Server (NTRS)

    Makarov, Y. S.; Ivanov, V. I.; Mokeyeva, V. I.; Tobelko, K. I.; Bukin, V. I.; Volkova, A. Y.; Kuznetsova, G. A.; Kuznetsov, L. M.

    1974-01-01

    The methods of powder and monocrystal X-ray diffraction served in identifying the mineral composition of gross samples of regolith from different levels of the drill core and about 80 individual regolith particles returned by the Luna 16 station. It was established that the Sea of Fertility regolith includes pyroxenes of the augite-pigeonite series, anorthites, ilmenite, olivines, spinels, alpha cristobalite, iron particles, glass, and several as yet unidentified particles. Crystallographic and roentgenometric data are given for all the lunar minerals found.

  17. Chemistry and surface morphology of soil particles from Luna 20 LRL sample 22003.

    NASA Technical Reports Server (NTRS)

    Carter, J. L.

    1973-01-01

    Optical and scanning electron microscopy, scanning electron microprobes and energy dispersion techniques were applied in an analysis of six siliceous glass spheres, five siliceous glass-bonded agglutinates and one breccia fragment from Luna 20 sample 22003. It is theorized that local meteor impact processes might have been responsible for the formation of most of the glass spheres and that the impacts of relatively high velocity particles might have been responsible for the craters observed on the surfaces of the spheres. The concentrations of iron spherules on the surfaces of the glass spheres were generally lower than in similar Apollo 11 and 12 glass spheres.

  18. X-ray diffraction identification of minerals in lunar regolith returned by Luna 16 automatic station

    NASA Technical Reports Server (NTRS)

    Makarov, Y. S.; Ivanov, V. I.; Mokeyeva, V. I.; Tobelko, K. I.; Bukin, V. I.; Volkova, A. Y.; Kuznetsova, G. A.; Kuznetsov, L. M.

    1974-01-01

    The methods of powder and monocrystal X-ray diffraction served in identifying the mineral composition of gross samples of regolith from different levels of the drill core and about 80 individual regolith particles returned by the Luna 16 station. It was established that the Sea of Fertility regolith includes pyroxenes of the augite-pigeonite series, anorthites, ilmenite, olivines, spinels, alpha cristobalite, iron particles, glass, and several as yet unidentified particles. Crystallographic and roentgenometric data are given for all the lunar minerals found.

  19. Major and trace element chemistry of Luna 24 samples from Mare Crisium

    NASA Technical Reports Server (NTRS)

    Blanchard, D. P.; Brannon, J. C.; Aaboe, E.; Budahn, J. R.

    1978-01-01

    Atomic absorption spectrometry and instrumental neutron activation analysis were employed to analyze six Luna 24 soils for major and trace elements. The analysis revealed well-mixed soils, though size fractions of each of the soils showed quite dissimilar compositions. Thus the regolith apparently has not been extensively reworked. Noritic breccia admixed preferentially to the finest size fractions and differential comminution of one or more other soil components accounted for the observed elemental distributions as a function of grain size. The ferrobasalt composition and one or more components with higher MgO contents have been identified in the samples.

  20. Crystallization kinetics in a multiply saturated basalt magma - An experimental study of Luna 24 ferrobasalt

    NASA Technical Reports Server (NTRS)

    Grove, T. L.; Bence, A. E.

    1979-01-01

    The paper deals with the effects of kinetics on mineral/melt partitioning and on fractional crystallization for a Luna-24 ferrobasalt. The composition is nearly multiply saturated under lunar surface conditions, making it possible to study the response of several mineral phases to kinetic factors during cooling. The differential suppression of the temperature of appearance of olivine, clinopyroxene, and plagioclase causes changes in the liquid line of descent. The course of liquid line of descent is mapped as a function of the cooling rate, and the partitioning of elements between pyroxene/liquid and olivine/liquid is examined.

  1. Luna stain, an improved selective stain for detection of microsporidian spores in histologic sections.

    PubMed

    Peterson, Tracy S; Spitsbergen, Jan M; Feist, Stephen W; Kent, Michael L

    2011-06-16

    Microsporidia in histologic sections are most often diagnosed by observing spores in host tissues. Spores are easy to identify if they occur in large aggregates or xenomas when sections are stained with hematoxylin and eosin (H&E). However, individual spores are not frequently detected in host tissues with conventional H&E staining, particularly if spores are scattered within the tissues, areas of inflammation, or small spores in nuclei (i.e. Nucleospora salmonis). Hence, a variety of selective stains that enhance visualization of spores is recommended. We discovered that the Luna stain, used to highlight eosinophils, red blood cells, and chitin in arthropods and other invertebrates, also stains spores of Pseudoloma neurophilia. We compared this stain to the Gram, Fite's acid fast, Giemsa, and H&E stains on 8 aquatic microsporidian organisms that were readily available in our 2 laboratories: Loma salmonae, Glugea anomala, Pseudoloma neurophilia, Pleistophora hyphessobryconis, Pleistophora vermiformis, Glugea sp., Steinhausia mytilovum, and an unidentified microsporidian from UK mitten crabs Eriocheir sinensis. Based on tinctorial properties and background staining, the Luna stain performed better for detection of 6 of the 8 microsporidia. Gram stain was superior for the 2 microsporidia from invertebrates: S. mytilovum and the unidentified microsporidian from E. sinensis.

  2. Shock-metamorphic effects in the Luna-16 soil sample from Mare Fecunditatis

    NASA Technical Reports Server (NTRS)

    French, B. M.

    1971-01-01

    The results of intensive studies indicate that shock-metamorphic effects, characteristic of meteorite impact and virtually identical to those observed in Apollo samples, are common in fragments of the Luna-16 soil sample from Mare Fecunditatis. Two types of shock effects are present: (1) deformation and partial melting features in rock and mineral fragments (1-2 percent of fragments); and (2) heterogeneous glasses and glassy breccias produced by shock melting (70-80 percent of fragments). Shock effects were observed in pyroxene (deformation twin lamellae, multiple planar shock lamellae, extreme mosaicism, partial isotropization); in plagioclase (planar shock lamellae, complete isotropization to form maskelynite); and in basalt fragments (plagioclase isotropization, selective partial melting). The glasses exhibit several characteristics of shock melting, especially: (1) diversity in chemical composition; (2) association with shock mineral fragments and Ni-Fe spherules; and (3) heterogeneous schlieren and incipient fusion of mineral inclusions. Two types of source rocks are present in the Luna-16 sample; basaltic (85-90 percent) and feldspathic (10-15 percent). The basaltic rocks are predominant and generally occur as unshocked fragments, indicating that they form the bedrock underlying Mare Fecunditatis.

  3. The Luna stain, an improved selective stain for detection of microsporidian spores in histologic sections

    PubMed Central

    Peterson, Tracy S.; Spitsbergen, Jan M.; Feist, Stephen W.; Kent, Michael L.

    2014-01-01

    Microsporidia in histologic sections are most often diagnosed by observing spores in host tissues. Spores are easy to identify if they occur in large aggregates or xenomas when sections are stained with hematoxylin and eosin (H&E). However, individual spores are not frequently detected in host tissues with conventional H&E staining, particularly if spores are scattered within the tissues, areas of inflammation or small spores in nuclei (i.e., Nucleospora salmonis). Hence, a variety of selective stains that enhance visualization of spores are recommended. We discovered that the Luna stain, used to highlight eosinophils, red blood cells and chitin in arthropods and other invertebrates, also stains spores of Pseudoloma neurophilia. We compared this stain to the Gram, Fite’s acid fast, Giemsa, and H&E stains on eight aquatic microsporidian organisms that were readily available in our two laboratories: Loma salmonae, Glugea anomala, Pseudoloma neurophilia, Pleistophora hyphessobryconis, Pleistophora vermiformis, Glugea sp., Steinhausia mytilovum and an unidentified microsporidian from E. sinensis, UK. Based on tinctorial properties and background staining, the Luna stain performed better for detection of 6 of the 8 microsporidia. Gram stain was superior for the two microsporidia from invertebrates, Steinhausia mytilovum and the unidentified microsporidian from E. sinensis. PMID:21848126

  4. The age and petrography of two Luna 20 fragments and inferences for widespread lunar metamorphism.

    NASA Technical Reports Server (NTRS)

    Podosek, F. A.; Huneke, J. C.; Gancarz, A. J.; Wasserburg, G. J.

    1973-01-01

    Ages were determined by the Ar-40/Ar-39 method on two metaclastic rocks returned from the lunar highlands north of Mare Fecunditatis by the Luna 20 probe. Both samples gave very well-defined argon retention ages of 3.90 plus or minus 0.04 AE which are indistinguishable from each other within a resolution of 0.02 AE. Both fragments, 22006 and 22007, are highly recrystallized polymict breccias; there is no evidence of radiogenic Ar-40, and the age almost surely dates the time of recrystallization. The cosmic ray exposure ages of these fragments are similar and high: 900 million years for 22006, 1300 million years for 22007. 22007 also contains substantial trapped argon with a high Ar-40/Ar-36. The Luna 20 results greatly extend the area of the moon's surface exhibiting a well-defined record of metamorphism at 3.9 AE. So far, lunar history in the interval from 4.6 to 3.9 AE is not preserved in the ages of surface rocks. This obliteration suggests lunar-wide metamorphic conditions occurring or terminating at this time as a result of major impacts.

  5. Il volto della Luna da Plutarco a Newton. Storia di una teoria ellenistica della gravità

    NASA Astrophysics Data System (ADS)

    Cappi, Alberto

    2013-03-01

    In his dialogue "De Facie quae in Orbe Lunae apparet", Plutarch includes a discussion on a non-Aristotelian theory of gravity. I describe how this theory could be developed during the Hellenistic period and its influence on the cosmological debate along the centuries until the beginning of modern science. (Text in Italian)

  6. Stratigraphies of Apollo and Luna Highland Landing Sites and Provenances of Materials from the Perspective of Basin Impact Ejecta Modeling

    NASA Technical Reports Server (NTRS)

    Haskin, Larry A.; Korotev, Randy L.; Gillis, Jeffrey J.; Jolliff, Bradley L.

    2002-01-01

    What are the provenances of the non-mare materials collected at the Apollo and Luna sampling sites? Results from basin ejecta modeling suggest that much of it came from distant basins. Additional information is contained in the original extended abstract.

  7. Geometry and Kinematics of Wrinkle Ridges on Lunae and Solis Plana, Mars: Implications for Fault/Fold Growth History

    NASA Technical Reports Server (NTRS)

    Tate, A.; Mueller, K. J.; Golombek, M. P.

    2002-01-01

    The three dimensional geometry of wrinkle ridges on Lunae and Solis Plana suggest they form by rapid lateral propagation and linkage of fault-propagation fold segments above reactivated blind thrust faults. Additional information is contained in the original extended abstract.

  8. Morphology of Wrinkle Ridges on Lunae and Solis Plana, Mars from MOLA Topography: Implications for Their Kinematic Development

    NASA Technical Reports Server (NTRS)

    Tate, A.; Golombek, M. P.; Mueller, K. J.

    2001-01-01

    Mars Orbiter Laser Altimeter (MOLA) topography is used to define the detailed morphology and kinematic development of martian wrinkle ridges on Lunae and Solis Plana. Changes in ridge morphology suggest they form as fault-propagation folds, often with significant backthrusts. Additional information is contained in the original extended abstract.

  9. Investigation of Luna-20 soil samples, using a mass spectrometer with a spark-discharge ion source

    NASA Technical Reports Server (NTRS)

    Hubbard, N. J.; Ramendik, G. I.; Gronskaia, S. I.; Gubina, I. IA.; Gushchin, V. N.

    1979-01-01

    A method of analyzing soil samples with a mass spectrometer employing a spark-discharge ion source is described, and the effectiveness of the method is demonstrated by applying it to the determination of impurities, in amounts of less than 10 mg, in lunar samples. It is shown that four parts of the Luna-20 lunar highland sample differ in their chemical composition.

  10. Stratigraphies of Apollo and Luna Highland Landing Sites and Provenances of Materials from the Perspective of Basin Impact Ejecta Modeling

    NASA Technical Reports Server (NTRS)

    Haskin, Larry A.; Korotev, Randy L.; Gillis, Jeffrey J.; Jolliff, Bradley L.

    2002-01-01

    What are the provenances of the non-mare materials collected at the Apollo and Luna sampling sites? Results from basin ejecta modeling suggest that much of it came from distant basins. Additional information is contained in the original extended abstract.

  11. Investigation of Luna-20 soil samples, using a mass spectrometer with a spark-discharge ion source

    NASA Technical Reports Server (NTRS)

    Hubbard, N. J.; Ramendik, G. I.; Gronskaia, S. I.; Gubina, I. IA.; Gushchin, V. N.

    1979-01-01

    A method of analyzing soil samples with a mass spectrometer employing a spark-discharge ion source is described, and the effectiveness of the method is demonstrated by applying it to the determination of impurities, in amounts of less than 10 mg, in lunar samples. It is shown that four parts of the Luna-20 lunar highland sample differ in their chemical composition.

  12. APPLICATION OF REMOTE SENSING TECHNIQUES TO DETERMINE POSSIBLE FLOOD AREAS IN THE CITY OF VILLAHERMOSA, TABASCO, MÉXICO

    NASA Astrophysics Data System (ADS)

    Rosique, L. O.; Prol-Ledesma, R.; Bonome, M. A.

    2009-12-01

    Villahermosa City, Tabasco, is located in southeastern Mexico, between the Grijalva and Carrizal rivers, with an average height of 10 meters above sea level; in addition, it has inner lagoons and an average annual precipitation of 1947 mm. The combination of these characteristics with anthropogenic factors have caused that the city has been affected by floods in different periods since its foundation. The objective of this study is to determine possible flood areas by the analysis of natural and anthropogenic conditions, which are involved in the process, using remote sensing techniques. The final results are presented in a geographic information system (GIS). The analysis was conducted in 3 stages: the first included a supervised classification of satellite images Landsat ETM + for dates before and after the 2007 flood event, with the aim of monitoring the changes in water bodies, to characterize their courses and to describe their dynamics; accuracy evaluation was performed with an error matrix and a 87% accuracy was obtained. The objective during the second stage was to determine the basin characteristics through geomorphological and hydrological analysis. Finally, the last stage consisted on combining the obtained results with an historical analysis of rainfall and streamflow to define the city areas that are likely to be flooded.

  13. Pectin methylesterase activity in vivo differs from activity in vitro and enhances polygalacturonase-mediated pectin degradation in tabasco pepper.

    PubMed

    Arancibia, Ramón A; Motsenbocker, Carl E

    2006-03-01

    Polygalacturonase (PG) and pectin methylesterase (PME) activities were analyzed in ripening fruits of two tabasco pepper (Capsicum frutescens) lines that differ in the extent of pectin degradation (depolymerization and dissolution). Ripe 'Easy Pick' fruit is characterized by pectin ultra-degradation and easy fruit detachment from the calyx (deciduous trait), while pectin depolymerization and dissolution in ripe 'Hard Pick' fruit is limited. PG activity in protein extracts increased similarly in both lines during fruit ripening. PME activity in vivo assessed by methanol production, however, was detected only in fruit of the 'Easy Pick' line and was associated with decreased pectin methyl-esterification. In contrast, methanol production in vivo was not detected in fruits of the 'Hard Pick' line and the degree of pectin esterification remained the same throughout ripening. Consequently, a ripening specific PME that is active in vivo appears to enhance PG-mediated pectin ultra-degradation resulting in cell wall dissolution and the deciduous fruit trait. PME activity in vitro, however, was detected in protein extracts from both lines at all ripening stages. This indicates that some PME isozymes are apparently inactive in vivo, particularly in green fruit and throughout ripening in the 'Hard Pick' line, limiting PG-mediated pectin depolymerization which results in moderately difficult fruit separation from the calyx.

  14. Molecular identification of the advanced third-stage larvae (ADV L(3)) of Gnathostoma lamothei in Tabasco, Mexico.

    PubMed

    Hernández-Gómez, Raúl Enrique; Martínez-Salazar, Elizabeth Aurelia; López-Jiménez, Serapio; León-Règagnon, Virginia

    2010-03-01

    Advanced third-stage larvae (ADV L(3)) of Gnathostoma spp. were collected from the muscle tissue of three species of freshwater fish (i.e., Gobiomorus dormitor, Petenia splendida, and Parachromis managuensis) in Swamps of Centla, Tabasco, Mexico. Nine sequences of the ITS2 of the ribosomal DNA of Gnathostoma spp. were compared with sequences obtained from GenBank for G. binucleatum, G. lamothei, G. miyazakii, G. spinigerum, and G. turgidum. Sequences of the ADV L(3) from P. splendida (Isla Chinal), P. managuensis (Isla Chinal), and of two of the six larvae collected from G. dormitor (Tres Brazos), were identical to that of G. binucleatum (GenBank). Sequences from the other four larvae from G. dormitor (Tres Brazos) are identical to the sequence of G. lamothei (GenBank). This is the first record of the intermediate host of G. lamothei. The only species documented to cause human gnathostomiasis in the Americas is G. binucleatum. Our finding of G. binucleatum, and G. lamothei parasitizing the commercially important fish species, G. dormitor in Centla swamps, indicates the possibility of G. lamothei causing human gnathostomiasis in Mexico as well. Copyright 2009 Elsevier Ireland Ltd. All rights reserved.

  15. [Breast self-examination in users of the Instituto Mexicano del Seguro Social from Teapa, Tabasco, Mexico].

    PubMed

    Córdova-Cadena, Samuel; González-Pozos, Patricia Vanessa; Zavala-González, Marco Antonio

    2015-01-01

    To establish the proportion of women of 40 years-old and more, which perform properly breast self-examination in the Family Medical Unit 18 of the Instituto Mexicano del Seguro Social from Teapa, Tabasco, Mexico, in 2011. Cross-sectional study in a universe of 1457 women. A random sample of 127 women was obtained and aleatorily selected. Socio-demographic and hereditary variables were included and breast self-examination technique was evaluated. The information was taken from clinical files and check lists. Descriptive statistic was obtained. The mean age was 52.7 ± 9.3, with a confidence interval of 40-80 years-old. Women with a primary-school education were the largest group, representing 35.4 %. Family antecedent of breast malign tumor was found in 11 %. The mother was the most frequent parent with this background (42.9 %). Adequate breast self-examination technique was observed in 0.8 %. The proportion of women that performs breast self-examination properly is very low. Associated factors were not found. Educative interventions are required in order to correct this problem.

  16. High hair cortisol concentrations predict worse cognitive outcome after stroke: Results from the TABASCO prospective cohort study.

    PubMed

    Ben Assayag, E; Tene, O; Korczyn, A D; Shopin, L; Auriel, E; Molad, J; Hallevi, H; Kirschbaum, C; Bornstein, N M; Shenhar-Tsarfaty, S; Kliper, E; Stalder, T

    2017-08-01

    The role of stress-related endocrine dysregulation in the development of cognitive changes following a stroke needs further elucidation. We explored this issue in a longitudinal study on stroke survivors using hair cortisol concentrations (HCC), a measure of integrated long-term cortisol levels. Participants were consecutive cognitively intact first-ever mild-moderate ischemic stroke/transient ischemic attack (TIA) survivors from the Tel Aviv Brain Acute Stroke Cohort (TABASCO) study. They underwent 3T magnetic resonance imaging (MRI) scanning and were cognitively assessed at admission, and at 6, 12 and 24 months post-stroke. Scalp hair samples were obtained during the initial hospitalization. Full data on baseline HCC, MRI scans and 2 years neuropsychological assessments were available for 65 patients. Higher HCC were significantly associated with a larger lesion volume and with worse cognitive results 6, 12 and 24 months post-stroke on most of the neurocognitive tests. 15.4% of the participants went on to develop clinically significant cognitive decline in the follow-up period, and higher HCC at baseline were found to be a significant risk factor for this decline, after adjustment for age, gender, body mass index and APOE e4 carrier status (HR=6.553, p=0.038). Our findings suggest that individuals with higher HCC, which probably reflect higher long-term cortisol release, are prone to develop cognitive decline following an acute stroke or TIA. Copyright © 2017 Elsevier Ltd. All rights reserved.

  17. Microfossil evidence for pre-Columbian maize dispersals in the neotropics from San Andrés, Tabasco, Mexico

    PubMed Central

    Pohl, Mary E. D.; Piperno, Dolores R.; Pope, Kevin O.; Jones, John G.

    2007-01-01

    The history of maize (Zea mays L.) is one of the most debated topics in New World archaeology. Molecular and genetic studies indicate that maize domestication took place in tropical southwest Mexico. Although archaeological evidence for the evolution of maize from its wild ancestor teosinte has yet to be found in that poorly studied region, other research combining paleoecology and archaeology is documenting the nature and timing of maize domestication and dispersals. Here we report a phytolith analysis of sediments from San Andrés, Tabasco, that confirms the spread of maize cultivation to the tropical Mexican Gulf Coast >7,000 years ago (≈7,300 calendar years before present). We review the different methods used in sampling, identifying, and dating fossil maize remains and compare their strengths and weaknesses. Finally, we examine how San Andrés amplifies the present evidence for widespread maize dispersals into Central and South America. Multiple data sets from many sites indicate that maize was brought under cultivation and domesticated and had spread rapidly out of its domestication cradle in tropical southwest Mexico by the eighth millennium before the present. PMID:17426147

  18. Inert gases in twelve particles and one 'dust' sample from Luna 16.

    NASA Technical Reports Server (NTRS)

    Heymann, D.; Lakatos, S.; Yaniv, A.

    1972-01-01

    The inert gases were measured mass-spectrometrically in 12 fragments and one dust sample from Luna 16. The fragments were classified petrologically by microscopic inspection. The major petrologic types were breccias and basalts. The He-4/Ne-20 ratio of the breccias (average 49) was systematically smaller than that of the basalts (average 78), probably because of He-Ne fractionation during or after the formation of the breccias. We suggest that the He-4/Ne-20 ratios of bulk fines in general may reflect the proportions of basaltic and breccia (plus cindery glasses) fragments in the fines. Exposure ages of four fragments are several hundred million years. The Ar-40/Ar-36 slopes of breccias and basalts are identical: 0.65.

  19. Wind generator for Solar Office Complex, Luna Vocational Technical Institute, Las Vegas, New Mexico

    NASA Astrophysics Data System (ADS)

    Schoenmackers, R.

    1985-03-01

    A 1-kilowatt Bergey wind generator was installed at the solar office complex of the Luna Vocational Technical Institute (LVTI) to supplement the power requirements of the building. The wind system was tied into the utility line at the office complex. Between November 1, 1983 and January 30, 1984, the wind generator produced 199 kilowatt hours, yielding an average capacity factor of 9.1%. The average wind speed over this period was 6.4 mph. Energy output data from this wind generator were compared with manufacturer's data. The data are in good agreement for wind speeds of less than 11 mph, but are lower than the manufacturer's data for wind speeds above 12 mph. The wind generator has and will continue to be used in the instructional program at LVTI.

  20. Rb-Sr age of a Luna 16 basalt and the model age of lunar soils.

    NASA Technical Reports Server (NTRS)

    Papanastassiou, D. A.; Wasserburg, G. J.

    1972-01-01

    An internal isochron was determined on a small basalt fragment (sample B-1) returned from the Luna 16 mission, which yields an age of 3.42 plus or minus 0.8 b.y. and a low initial Sr87/Sr86 value. A comparison is made of the data from four lunar missions to mare sites which shows that the last period of major flooding of the mare basins is confined to a narrow time interval of only 0.55 b.y. The direct evidence of major lunar magmatic activity appears to be confined to the interval from 3.1 to 4.0 b.y. The Sr87/Sr86 values for all mare basalts are extremely primitive and lie in a rather narrow range. A diagram is given for initial Sr87/Sr86 as a function of time for all lunar rocks.

  1. Eosinophilic leukemia in three African pygmy hedgehogs ( Atelerix albiventris) and validation of Luna stain.

    PubMed

    Martínez-Jiménez, David; Garner, Bridget; Coutermarsh-Ott, Sheryl; Burrell, Caitlin; Clark, Sabrina; Nabity, Mary; Díaz-Delgado, Josué; Rodrigues-Hoffmann, Aline; Zaks, Karen; Proença, Laila; Divers, Stephen; Saba, Corey; Cazzini, Paola

    2017-03-01

    Neoplasia is usually encountered in the African pygmy hedgehog at a mean age of 3.5 y, and malignancy is common. Myelogenous leukemias are rarely reported in hedgehogs. We describe 3 cases of eosinophilic leukemia in adult, middle-aged (mean age: 2.3 y) hedgehogs, for which prognosis appears grave. In 1 case, attempted treatment was unsuccessful, and in all 3 cases, the disease course was rapid and all died soon after diagnosis. Blood smear evaluation, along with complete blood count, was critical in making the diagnosis in all cases. Luna stain was validated and used to better visualize eosinophils in cytologic and histologic sections. Electron microscopy confirmed the presence of specific granules in hedgehog eosinophils.

  2. Inert gases in twelve particles and one 'dust' sample from Luna 16.

    NASA Technical Reports Server (NTRS)

    Heymann, D.; Lakatos, S.; Yaniv, A.

    1972-01-01

    The inert gases were measured mass-spectrometrically in 12 fragments and one dust sample from Luna 16. The fragments were classified petrologically by microscopic inspection. The major petrologic types were breccias and basalts. The He-4/Ne-20 ratio of the breccias (average 49) was systematically smaller than that of the basalts (average 78), probably because of He-Ne fractionation during or after the formation of the breccias. We suggest that the He-4/Ne-20 ratios of bulk fines in general may reflect the proportions of basaltic and breccia (plus cindery glasses) fragments in the fines. Exposure ages of four fragments are several hundred million years. The Ar-40/Ar-36 slopes of breccias and basalts are identical: 0.65.

  3. Compact Low Power DPU for Plasma Instrument LINA on the Russian Luna-Glob Lander

    NASA Astrophysics Data System (ADS)

    Schmidt, Walter; Riihelä, Pekka; Kallio, Esa

    2013-04-01

    The Swedish Institute for Space Physics in Kiruna is bilding a Lunar Ions and Neutrals Analyzer (LINA) for the Russian Luna-Glob lander mission and its orbiter, to be launched around 2016 [1]. The Finnish Meteorological Institute is responsible for designing and building the central data processing units (DPU) for both instruments. The design details were optimized to serve as demonstrator also for a similar instrument on the Jupiter mission JUICE. To accommodate the originally set short development time and to keep the design between orbiter and Lander as similar as possible, the DPU is built around two re-programmable flash-based FPGAs from Actel. One FPGA contains a public-domain 32-bit processor core identical for both Lander and orbiter. The other FPGA handles all interfaces to the spacecraft system and the detectors, somewhat different for both implementations. Monitoring of analog housekeeping data is implemented as an IP-core from Stellamar inside the interface FPGA, saving mass, volume and especially power while simplifying the radiation protection design. As especially on the Lander the data retention before transfer to the orbiter cannot be guaranteed under all conditions, the DPU includes a Flash-PROM containing several software versions and data storage capability. With the memory management implemented inside the interface FPGA, one of the serial links can also be used as test port to verify the system, load the initial software into the Flash-PROM and to control the detector hardware directly without support by the processor and a ready developed operating system and software. Implementation and performance details will be presented. Reference: [1] http://www.russianspaceweb.com/luna_glob_lander.html.

  4. [Presence and spatio-temporal habitat characterization of Dermatemys mawii (Testudines: Dermatemydidae) in the Grijalva-Usumacinta watershed, Tabasco, Mexico].

    PubMed

    Zenteno Ruiz, Claudia Elena; Barba Macias, Everardo; Bello-Gutiérrez, Joaquín; Ochoa-Gaona, Susana

    2010-12-01

    The Central American River Turtle (Dermatemys mawii) is an endangered species that has been poorly studied. There are no reports on their population status, habitat condition, and the species distribution area is still unknown. This study analyzes the seasonal and spatial variations of their habitat and the presence/absence of D. mawii in three rivers within the Pantanos de Centla Biosphere Reserve (Tabasco, Mexico). For habitat characterization, natural segmentation of rivers was used and three sites per segment were identified, 9 in each rivers (Grijalva and Usumacinta) and 6 in Tabasquillo. Additionally, the evaluation of 11 environmental variables such as water hydrological, physicochemical characteristics and riparian and hydrophytic vegetation were carried out during two different seasons (dry and rainy). The presence/absence of species was assessed with eight fike nets that were set per segment, with a capture effort of 384 hours per trap. The capture per unit effort (CPUE) was used as an indicator of relative abundance. The results indicated spatio-temporal variations in habitat characteristics and the presence of environmental gradients. The principal components analysis (PCA) applied allowed us to determine that the first three components explained 67.8% of the environmental variability. The species presence was confirmed in all rivers, however significant differences exists in their relative abundance: the highest was registered in the Tabasquillo River where the species was present in both seasons and in all segments. Of the 11 environmental variables analyzed, the gradient, shelter and depth were the most indicative of species presence. The obtained results evidenced the importance of riparian vegetation as habitat for Dermatemys. This represents the first approach towards an action plan for a species and its habitat protection within the Pantanos de Centla Biosphere Reserve.

  5. Morphological variation of genetically confirmed Alouatta Pigra × A. palliata hybrids from a natural hybrid zone in Tabasco, Mexico.

    PubMed

    Kelaita, Mary A; Cortés-Ortiz, Liliana

    2013-02-01

    While hybridization has been reported for a large number of primate taxa, there is a general lack of data on hybrid morphology for wild individuals with known genetic ancestry. A confirmed hybrid zone for the closely related Neotropical primates Alouatta palliata and A. pigra has provided a unique opportunity to study primate hybrid morphological variation. Here we used molecular evidence based on mitochondrial, Y-chromosome, and autosomal data to assess hybrid ancestry. We conducted univariate and multivariate statistical comparisons of morphometric data collected from individuals both outside and within the hybrid zone in Tabasco, Mexico. Our results show that of all the hybrids detected (N = 128), only 12% of them were approximately genetically intermediate, and none of them were first generation hybrids. Univariate pairwise comparisons among parental individuals, multigenerational backcrossed hybrids, and intermediate hybrids showed that overall, multigenerational backcrossed hybrids resemble the parental species with which they share most of their alleles. Conversely, intermediates were highly variable. Similarly, principal component analysis depicts an overlap between the parental species and their backcrosses when considering overall morphological differences. Finally, discriminant function analysis of the morphological variables was overall unreliable for classifying individuals into their assigned genotypic classes. Taken together, our results suggest that primate natural hybridization studies should incorporate molecular methods for determining ancestry, because morphology may not always be a reliable indicator of hybrid status. Hybrid zones could comprise a large number of multigenerational backcrossed hybrids that are indistinguishable from the parental species. The implications for studying hybridization in the primate fossil record are discussed. Copyright © 2012 Wiley Periodicals, Inc.

  6. [The interaction of municipal labor markets in the state of Tabasco: an approximation via the use of gravitational models].

    PubMed

    Juarez, E

    1993-01-01

    Employment is an important factor in state planning and a variable in both economic activity and population. Multiregional methodologies which incorporate territorial variables in functional type analyses may be used to study the interactions between municipal labor markets, helping identify those that should receive priority assistance in developing their sources of employment. This work uses a gravitational model to analyze interactions between the local labor markets of 17 seats of municipios in the state of Tabasco as demonstrated with data from the census of 1990. The working hypothesis was that alternatives for labor market growth are distributed hierarchically in descending order of supply as a function of the size of the economically active population in each locality, the relative participation of the unemployed in each locality, and the distance between the localities. The modeling of interaction between local labor markets is achieved in three stages. First, a gravitational model is adjusted with restrictions in the origins. The next step requires use of the parameters resulting from the first step to predict the number of trips to each destination, as a function of levels of unemployment in each locality producing trips. The third stage consists of predictive application of a gravitational model restricted in both origin and destination to define the magnitude of flows between each point of origin and each point of destination. The general character of the gravitational model is described for each step. The model suggests that the main interactions between local labor markets at the level of seats of municipios are located in the center of the state. Three municipal seats in particular had great potential for labor market growth. A separate system of labor market interaction was observed in the southern part of the state. The coastal zone did not appear to offer an alternative for labor market growth.

  7. Birth and death of the Late Cretaceous ``La Luna Sea'', and origin of the Tres Esquinas phosphorites

    NASA Astrophysics Data System (ADS)

    Erlich, R. N.; Macsotay I., O.; Nederbragt, A. J.; Lorente, M. Antonieta

    2000-05-01

    Deposition of organic carbon-rich intervals of the La Luna and Navay formations of northwestern Venezuela was governed by the development of key paleobathymetric barriers (Santa Marta and Santander massifs, Paraguana Block, and ancestral Mérida Andes). These enhanced the development of anoxia in the "La Luna Sea" by causing poor circulation and limited ventilation. Anoxia was also promoted by high evaporation and low precipitation rates (high salinity bottom water), and high levels of marine algal productivity (high organic matter flux). Nutrient supply was augmented by infrequent fluvial sources. Bottom water oxygen levels increased from the Late Santonian through the end of the Cretaceous. Ventilation of anoxic bottom waters may have been enhanced by more frequent or intense seasonal upwelling (caused by higher wind stress) and catastrophic overturn, as well as the removal of a key paleobathymetric barrier. Common byproducts of overturn events were massive phytoplankton blooms, which produced red tides. Fish and marine reptile bone beds within the Tres Esquinas Member (La Luna Formation) are attributed to massive mortality during these events, and are correlative with similar Campanian units in eastern Colombia. During the Maastrichtian, increasing ventilation, combined with siliciclastic dilution, ultimately produced sediments with lower total organic carbon (TOC) content.

  8. [Bionomics data and descriptions of the immatures of Calyptocephala gerstaeckeri Boheman (Coleoptera: Chrysomelidae), pest of the oil palm (Elaeis guineensis J.) and camedor palm (Chamaedorea elegans Mart.) (Arecaceae) in Tabasco, Mexico].

    PubMed

    Córdova-Ballona, Leonides; Sánchez-Soto, Saúl

    2008-01-01

    Characters of the external morphology of egg, larval instars and pupae of Calyptocephala gerstaeckeri Boheman, insect pest of oil palm (Elaeis guineensis J.) and camedor palm (Chamaedorea elegans Mart.) in the State of Tabasco, Mexico, are described and illustrated. Some bionomics data are also presented. The specie was reared in the laboratory on young oil palm plants.

  9. Suicide: Incidence or Prevalence? Comments on Hernández-Alvarado et al. Increase in Suicide Rates by Hanging in the Population of Tabasco, Mexico between 2003 and 2012. Int. J. Environ. Res. Public Health 2016, 13, 552.

    PubMed

    Fernández-Niño, Julián Alfredo

    2016-07-01

    I recently reviewed the paper published in this journal by Hernández-Alvarado et al., titled "Increase in Suicide Rates by Hanging in the Population of Tabasco, Mexico between 2003 and 2012" [1], and I noticed that the epidemiological concept "prevalence" is not correctly used.[...].

  10. Preliminary Geophysical Survey for Assessing the Geotechnical Conditions and Geohazards at Huaca de La Luna, Peru

    NASA Astrophysics Data System (ADS)

    Zavala, G. J.; Lopez, S.; Ebinger, C. J.; Pando, M. A.; Lambert, C.; Morales, R.; Uceda, S.; Perucchio, R.; Castaneda, B.; Aguilar, R.

    2014-12-01

    This paper presents results of near surface geophysical tests to help assess the geotechnical conditions of the archaeological complex of Huaca de la Luna located near the coastal city of Trujillo, Peru. This area of Peru has experienced damaging earthquakes and tsunamis in historic time. The huaca complex is a massive adobe temple progressively built by the Moche civilization from 100 AD to 650 AD. The geophysical tests carried out included Ground Penetrating Radar (GPR), magnetic gradiometer, and Multichannel Analysis of Surface Waves (MASW) to help assess geotechnical conditions such as buried cavities and hallways, thickness and elastic properties of sand sediments, and the depth to the underlying granitic bedrock. The tests were performed to help with the investigation of structural damage observed along a massive adobe wall (north façade) which has shown signs of distress including fissures, settlements, and other damage. The geophysical results together with detailed Lidar surveying are being used as part of this investigation and highlight the usefulness of these non-destructive techniques for archaeological and historical sites.

  11. Direct measurement of the 22Ne(p,γ)23Na reaction cross section at LUNA

    NASA Astrophysics Data System (ADS)

    Ferraro, Federico; LUNA Collaboration

    2016-06-01

    The 22Ne(p, γ)23Na reaction takes part in the NeNa cycle of hydrogen burning, influencing the production of the elements between 20Ne and 27Al in red giant stars, asymptotic giant stars and classical novae. The 22Ne(p,γ)27Na reaction rate is very uncertain because of a large number of tentative resonances in the Gamow window, where only upper limits were quoted in literature. A direct measurement of the 22Ne(p, γ)23Na reaction cross section has been carried out at LUNA using a windowless differential-pumping gas target with two high- purity germanium (HPGe) detectors. A new measurement with a 4π bismuth germanate (BGO) summing detector is ongoing. During the HPGe phase of the experiment the strengths of the resonances at 156.2 keV, 189.5 keV and 259.7 keV have been directly measured for the first time and their contribution to the reaction rate has been calculated. The decay scheme of the newly discovered resonances has been established as well and some improved upper limits on the unobserved resonances have been put. The BGO detector with its 70% γ-detection efficiency allows to measure the cross section at lower energy. In order to further investigate the resonances at 71 keV and 105 keV and the direct-capture component, the data taking is ongoing.

  12. Feasibility study of the 13C(α, n)16O reaction at LUNA

    NASA Astrophysics Data System (ADS)

    Kochanek, I.; Boeltzig, A.; Ciani, G. F.

    2017-03-01

    The 13C(α, n)16O reaction determines the dominant neutron source of the sprocess in thermally pulsing, low-mass, asymptotic giant branch (TP-AGB) stars. The temperature during the s-process in the 13C pocket of 90×106 K corresponds to a Gamow window of 140-230 keV. Since this energy is far below the Coulomb barrier, the cross section of this reaction is extremely small and its rate can only be extrapolated from the measurements at higher energies. At present, the cross section at Gamow peak is uncertain by almost one order of magnitude. An experimental campaign aimed at measuring low energy cross section in 13C(α n)16O is scheduled at the underground LUNA-400 accelerator in Gran Sasso Laboratory, Italy. The unique underground location of this facility offers significant improvement in sensitivity compared with previous investigations. It will allow to establish the interference pattern of the resonances and the absolute scale of this reaction.

  13. Chemical and Sr-isotopic characteristics of the Luna 24 samples

    NASA Technical Reports Server (NTRS)

    Nyquist, L. E.; Mckay, G.; Wiesmann, H.; Bansal, B.; Wooden, J.

    1978-01-01

    The chemical and Sr isotopic characteristics of Luna 24 bulk soil samples are determined and interpreted within the framework of lunar mare basalt evolution. Major and trace element compositions lead to the suggestion of candidate rock types consisting of a basalt/gabbro with very low TiO2 and MgO content (52%), a very low TiO2 basalt with 10% MgO (23%), olivine vitrophyre (20%), low K Fra Mauro basalt (4%) and anorthositic gabbro (1%). The proposed compositions are supported by the agreement of mixing models based on the proposed compositions with observed soil compositions. Sr ratios for plagioclase samples imply a lower Sr-87/Sr-86 value for low Mg soils than for other mare basalts and higher Rb/Sr and a more evolved Sr ratio in high Mg basalts. Rb, Sr and rare earth element compositions for low Mg basalts fit a model of partial remelting of cumulates containing small amounts of plagioclase.

  14. Solar-flare exposure and thermoluminescence of Luna 24 core material

    NASA Astrophysics Data System (ADS)

    Durrani, S. A.; Bull, R. K.; McKeever, S. W.

    1980-06-01

    Mineral grains from three depths within the Luna 24 drill core (approximately 90, 125 and 196 cm) have been examined for solar-flare tracks. Large proportions (55-100%) of grains from all three levels are found to be track-rich (with central track densities greater than 100 million/sq cm), and a substantial fraction (approximately 25-50%) of all grains display track-density gradients. These observations indicate that most of the mineral grains have been cycled through the top at approximately 1 mm of the lunar surface at some time in their history. The most likely depositional model envisages rapid infall of highly irradiated material into a less mature local component with little subsequent reworking. Thermoluminescence (TL) studies indicate a lower natural radiation dose in samples from the 196 cm level compared with those from the two upper levels. This can result either from random variations in the local internal radioactivity or from mixing properties of the pre-irradiated material over time scales of less than approximately 100 ka. Radiation sensitization of samples suggests a possible use of TL sensitivity for the interpretation of lunar radiation history.

  15. Geology and geochemistry of the La Luna Formation type sections in the Maracaibo basin, Venezuela

    SciTech Connect

    Baptista, N.; Scherer, W.

    1996-08-01

    The Upper Cretaceous La Luna Formation is the most important source rock of hydrocarbons in Western Venezuela. Curiously enough it has two type sections, the formation was first defined in 1926 in Perija on the western flank of the Maracaibo basin; 30 years later the La Aguada, Chejende and Timbetes members were defined 260 km toward the east, on the shelf of the basin. The purpose of this study is to compare these sections and to define the vertical and horizontal variability of geological and geochemical characteristics that might have influenced the generation of hydrocarbons. The study consisted of detailed, bed level sampling, macroscopic sedimentary descriptions, petrography of 168 thin sections with 40 variables recorded in a statistical data matrix for determination of lithomicrofacies, as well as geochemical analysis of total organic carbon (TOC), visual kerogen, Rock-Eval pyrolysis and gas chromatography. The western type section is characterized by alternating thinly laminated and massive bedded limestones. Thermally immature, amorphous organic matter of marine origin is abundant in this section; TOC values range from 0.23% to 8.56%, generally increasing toward the top. Hydrogen index values range from 327 to 1078, indicating good to excellent oil generating potential. The eastern type sections have a higher level of thermal maturity; they show increasing amounts of clastic material, less authigenic minerals and abundant Favreina sp crab fecal pellets. The mainly terrestrially derived organic matter concentrations are considerably less, ranging from 0.07 to 3.39, again increasing toward the top of the section.

  16. Luna 20 soil - Abundance and composition of phases in the 45-125 micron fraction.

    NASA Technical Reports Server (NTRS)

    Reid, A. M.; Warner, J. L.; Ridley, W. I.; Brown, R. W.

    1973-01-01

    Glass compositions in the Luna 20 soil indicate a minor contribution of mare rocks and a major contribution of highly feldspathic highland material. Glasses with the composition of highland basalt (anorthositic gabbro or norite) predominate in a range of highly aluminous glasses. The analyses of minerals in the soil show that the highland rocks have a unique assemblage of minerals that can readily be distinguished from the mineral assemblages of either mare or KREEP basalts. The soils are characterized by abundant anorthitic, low-Fe plagioclase. Highly magnesian orthopyroxenes, pigeonites, and augites are the most prominent pyroxenes. Unlike mare basalt pyroxenes, clinopyroxenes with intermediate Ca values are not abundant, but extreme iron enrichment toward pyroxferroite does occur. Olivines are more abundant than at other sites and are Mg-rich, low in Ca and Cr. Spinels with compositions approaching MgAl2O4 predominate over pleonastes and chromites. Ilmenite and metal are present but not abundant. The mineral compositions are consistent with derivation from a suite of highly feldspathic rocks in which highland basalt compositions predominate.

  17. Eclipse parcial de Luna - 23-24 de Marzo de 1997

    NASA Astrophysics Data System (ADS)

    Arquiola, A. P.; Arquiola, F. E.

    Luego de varios años en que las condiciones climáticas no nos permitían registrar el fenómeno, pudimos observar y realizar secuencias fotográficas del eclipse parcial Luna. Siendo de una magnitud de 0.92 (muy cercano a la totalidad) se obtuvo una serie de fotografías muy claras y preferentemente con gran contraste a fin de destacar las tonalidades de las sombras, en especial la penumbra, que desde ya el clima nos favoreció. Los métodos fotográficos fueron, en primer lugar, con telezoom de 210mm a f/4.5 con película color de 1600 ASA; y el ya clásico método a foco primario en el Telescopio Schmidt - Cassegrain de 200mm a f/10. Paralelamente a la observación del eclipse, estábamos al instante comunicados por correo electrónico con otros observadores desde diferentes lugares del mundo intercambiando reportes, y también usuarios en general de la red, de esta forma se hizo muy especial el fenómeno. Instrumentos utilizados : Telescopio Schmidt-Cassegrain 200mm f/10, Cámara fotográfica Minolta con Telezoom 210mm f/4.5, Película 1600 ASA color, Telescopio Refractor 80mm a f/15

  18. Chemical and Sr-isotopic characteristics of the Luna 24 samples

    NASA Technical Reports Server (NTRS)

    Nyquist, L. E.; Mckay, G.; Wiesmann, H.; Bansal, B.; Wooden, J.

    1978-01-01

    The chemical and Sr isotopic characteristics of Luna 24 bulk soil samples are determined and interpreted within the framework of lunar mare basalt evolution. Major and trace element compositions lead to the suggestion of candidate rock types consisting of a basalt/gabbro with very low TiO2 and MgO content (52%), a very low TiO2 basalt with 10% MgO (23%), olivine vitrophyre (20%), low K Fra Mauro basalt (4%) and anorthositic gabbro (1%). The proposed compositions are supported by the agreement of mixing models based on the proposed compositions with observed soil compositions. Sr ratios for plagioclase samples imply a lower Sr-87/Sr-86 value for low Mg soils than for other mare basalts and higher Rb/Sr and a more evolved Sr ratio in high Mg basalts. Rb, Sr and rare earth element compositions for low Mg basalts fit a model of partial remelting of cumulates containing small amounts of plagioclase.

  19. Silicate melt inclusions and glasses in lunar soil fragments from the Luna 16 core sample

    USGS Publications Warehouse

    Roedder, E.; Weiblen, P.W.

    1972-01-01

    More than 2000 fragments were studied microscopically, and electron microprobe analyses were made of 39 selected areas, from a few square mm of polished surface, through 75- to 425-??m fragments of lunar soil from two samples of the Luna 16 core. The silicate melt inclusions and glasses differ in important details from those observed earlier in the Apollo samples. Melt inclusions in olivine contain epitaxially oriented daughter crystals, but also show a similar epitaxy around the outside of the crystals not observed in previous lunar samples. Melt inclusions in ilmenite suggest trapping at successive stages in a differentiation sequence. There is abundant evidence for late-stage silicate liquid immiscibility, with melt compositions similar but not identical to those from Apollo 11 and 12. A comparison of the alkali ratio of any given bulk rock analysis with that of its late-stage, high-silica melt shows gross differences for different rocks. This is pertinent to understanding late-stage differentiation processes. Glass fragments and spherules exhibit a wide range of crystallization textures, reflecting their wide range of compositions and cooling histories. No significant differences were found between the two portions of core examined (Zones A and D). ?? 1972.

  20. Validation, comparison, and combination of algorithms for automatic detection of pulmonary nodules in computed tomography images: The LUNA16 challenge.

    PubMed

    Setio, Arnaud Arindra Adiyoso; Traverso, Alberto; de Bel, Thomas; Berens, Moira S N; Bogaard, Cas van den; Cerello, Piergiorgio; Chen, Hao; Dou, Qi; Fantacci, Maria Evelina; Geurts, Bram; Gugten, Robbert van der; Heng, Pheng Ann; Jansen, Bart; de Kaste, Michael M J; Kotov, Valentin; Lin, Jack Yu-Hung; Manders, Jeroen T M C; Sóñora-Mengana, Alexander; García-Naranjo, Juan Carlos; Papavasileiou, Evgenia; Prokop, Mathias; Saletta, Marco; Schaefer-Prokop, Cornelia M; Scholten, Ernst T; Scholten, Luuk; Snoeren, Miranda M; Torres, Ernesto Lopez; Vandemeulebroucke, Jef; Walasek, Nicole; Zuidhof, Guido C A; Ginneken, Bram van; Jacobs, Colin

    2017-07-13

    Automatic detection of pulmonary nodules in thoracic computed tomography (CT) scans has been an active area of research for the last two decades. However, there have only been few studies that provide a comparative performance evaluation of different systems on a common database. We have therefore set up the LUNA16 challenge, an objective evaluation framework for automatic nodule detection algorithms using the largest publicly available reference database of chest CT scans, the LIDC-IDRI data set. In LUNA16, participants develop their algorithm and upload their predictions on 888 CT scans in one of the two tracks: 1) the complete nodule detection track where a complete CAD system should be developed, or 2) the false positive reduction track where a provided set of nodule candidates should be classified. This paper describes the setup of LUNA16 and presents the results of the challenge so far. Moreover, the impact of combining individual systems on the detection performance was also investigated. It was observed that the leading solutions employed convolutional networks and used the provided set of nodule candidates. The combination of these solutions achieved an excellent sensitivity of over 95% at fewer than 1.0 false positives per scan. This highlights the potential of combining algorithms to improve the detection performance. Our observer study with four expert readers has shown that the best system detects nodules that were missed by expert readers who originally annotated the LIDC-IDRI data. We released this set of additional nodules for further development of CAD systems. Copyright © 2017 Elsevier B.V. All rights reserved.

  1. Landing site selection for Luna-Glob mission in crater Boguslawsky

    NASA Astrophysics Data System (ADS)

    Ivanov, M. A.; Hiesinger, H.; Abdrakhimov, A. M.; Basilevsky, A. T.; Head, J. W.; Pasckert, J.-H.; Bauch, K.; van der Bogert, C. H.; Gläser, P.; Kohanov, A.

    2015-11-01

    Boguslawsky crater (72.9°S, 43.3°E, ~100 km in diameter) is a primary target for the Luna-Glob mission. The crater has a morphologically smooth (at the resolution of WAC images), flat, and horizontal floor, which is about 55-60 km in diameter. Two ellipses were selected as specific candidate landing areas on the floor: the western ellipse is centered at 72.9°S, 41.3°E and the eastern ellipse is centered at 73.9°S, 43.9°E. Both ellipses represent areas from which Earth is visible during the entire year of 2016 and lack permanently shadowed areas. Boguslawsky crater is located on or near the rim of the South Pole-Aitken basin, which provides the unique possibility to sample some of the most ancient rocks on the Moon that probably pre-date the SPA impact event. The low depth/diameter ratio of Boguslawsky suggests that the crater has been partly filled after its formation. Although volcanic flooding of the crater cannot be ruled out, the more likely process of filling of Boguslawsky is the emplacement of ejecta from nearby and remote large craters/basins. Three morphologically distinctive units are the most abundant within the selected landing ellipses: rolling plains (rpc), flat plains (fp), and ejecta from crater Boguslawsky-D (ejf), which occurs on the eastern wall of Boguslawsky. The possible contribution of materials from unknown sources makes the flat and rolling plains less desirable targets for landing. In contrast, ejecta from Boguslawsky-D represents local materials re-distributed by the Boguslawsky-D impact from the wall onto the floor of Boguslawsky. Thus, this unit, which constitutes about 50% of the eastern landing ellipse, represents a target of clearer provenance and a higher scientific priority.

  2. Investigation of biological activity of fine fraction of lunar surface material returned to earth by the Luna 16 automatic station

    NASA Technical Reports Server (NTRS)

    Kustov, V. V.; Ostapenko, O. F.; Petrukhin, V. G.

    1974-01-01

    The biological action of a sample of lunar surface material returned to earth by the Luna 16 automatic station from a new region of the mare surface on male white mice was studied. The condition and behavior of the animals were observed; the intensity of their oxygen consumption was recorded, and motor activity of the muscles, leucocyte and erythrocytes counts in the peripheral blood, and the activity of whole blood chloinesterase were determined. Experimental results showed that the tested doses of the fine fraction of the lunar surface material from the Sea of Fertility were virtually innocuous for white mice.

  3. Effects of the Mi-1, N and Tabasco Genes on Infection and Reproduction of Meloidogyne mayaguensis on Tomato and Pepper Genotypes

    PubMed Central

    Brito, J. A.; Stanley, J. D.; Kaur, R.; Cetintas, R.; Di Vito, M.; Thies, J. A.; Dickson, D. W.

    2007-01-01

    Meloidogyne mayaguensis is a damaging root-knot nematode able to reproduce on root-knot nematode-resistant tomato and other economically important crops. In a growth chamber experiment conducted at 22 and 33°C, isolate 1 of M. mayaguensis reproduced at both temperatures on the Mi-1-carrying tomato lines BHN 543 and BHN 585, whereas M. incognita race 4 failed to reproduce at 22°C, but reproduced well at 33°C. These results were confirmed in another experiment at 26 ± 1.8°C, where minimal or no reproduction of M. incognita race 4 was observed on the Mi-1-carrying tomato genotypes BHN 543, BHN 585, BHN 586 and ‘Sanibel’, whereas heavy infection and reproduction of M. mayaguensis isolate 1 occurred on these four genotypes. Seven additional Florida M. mayaguensis isolates also reproduced on resistant ‘Sanibel’ tomato at 26 ± 1.8°C. Isolate 3 was the most virulent, with reproduction factor (Rf) equal to 8.4, and isolate 8 was the least virulent (Rf = 2.1). At 24°C, isolate 1 of M. mayaguensis also reproduced well (Rf ≥ 1) and induced numerous small galls and large egg masses on the roots of root-knot nematode-resistant bell pepper ‘Charleston Belle’ carrying the N gene and on three root-knot nematode-resistant sweet pepper lines (9913/2, SAIS 97.9001 and SAIS 97.9008) carrying the Tabasco gene. In contrast, M. incognita race 4 failed to reproduce or reproduced poorly on these resistant pepper genotypes. The ability of M. mayaguensis isolates to overcome the resistance of tomato and pepper genotypes carrying the Mi-1, N and Tabasco genes limits the use of resistant cultivars to manage this nematode species in infested tomato and pepper fields in Florida. PMID:19259507

  4. Effects of the Mi-1, N and Tabasco Genes on Infection and Reproduction of Meloidogyne mayaguensis on Tomato and Pepper Genotypes.

    PubMed

    Brito, J A; Stanley, J D; Kaur, R; Cetintas, R; Di Vito, M; Thies, J A; Dickson, D W

    2007-12-01

    Meloidogyne mayaguensis is a damaging root-knot nematode able to reproduce on root-knot nematode-resistant tomato and other economically important crops. In a growth chamber experiment conducted at 22 and 33 degrees C, isolate 1 of M. mayaguensis reproduced at both temperatures on the Mi-1-carrying tomato lines BHN 543 and BHN 585, whereas M. incognita race 4 failed to reproduce at 22 degrees C, but reproduced well at 33 degrees C. These results were confirmed in another experiment at 26 +/- 1.8 degrees C, where minimal or no reproduction of M. incognita race 4 was observed on the Mi-1-carrying tomato genotypes BHN 543, BHN 585, BHN 586 and 'Sanibel', whereas heavy infection and reproduction of M. mayaguensis isolate 1 occurred on these four genotypes. Seven additional Florida M. mayaguensis isolates also reproduced on resistant 'Sanibel' tomato at 26 +/- 1.8 degrees C. Isolate 3 was the most virulent, with reproduction factor (Rf) equal to 8.4, and isolate 8 was the least virulent (Rf = 2.1). At 24 degrees C, isolate 1 of M. mayaguensis also reproduced well (Rf >/= 1) and induced numerous small galls and large egg masses on the roots of root-knot nematode-resistant bell pepper 'Charleston Belle' carrying the N gene and on three root-knot nematode-resistant sweet pepper lines (9913/2, SAIS 97.9001 and SAIS 97.9008) carrying the Tabasco gene. In contrast, M. incognita race 4 failed to reproduce or reproduced poorly on these resistant pepper genotypes. The ability of M. mayaguensis isolates to overcome the resistance of tomato and pepper genotypes carrying the Mi-1, N and Tabasco genes limits the use of resistant cultivars to manage this nematode species in infested tomato and pepper fields in Florida.

  5. Lunar Surface Origins Exploration (LunaSOX) -Virtual observatory facility for solar wind plasma interactions with the Moon

    NASA Astrophysics Data System (ADS)

    Cooper, John

    A new virtual observatory facility is being will be implemented in support of solar wind and terrestrial magnetospheric plasma interactions with the lunar surface and atmospheric envi-ronments. The NASA Heliophysics virtual observatory approach of open on-line metadata registration, discovery, access, and supporting value-added tools will be applied to selected data products from lunar surface, lunar orbital, and earth-orbiting solar wind monitors. The LunaSOX facilty at lunasox,gsfc.nasa.gov will be operated by a science focus group for NASA's Virtual Heliospheric Observatory. Initial primary focus will be on the Apollo ALSEP solar wind monitor data products already accessible on-line in through the Coordinated Data Anal-ysis Web (CDAWeb) service of the NASA Space Physics Data Facility (SPDF). These data will be recast in forms appropriate for support of the plasma interaction modeling and the new value-added data products will be posted through the virtual observatory. Supporting lunar and Earth orbit data of the Apollo era in the NASA archives will be similarly treated and posted on-line. The LunaSOX virtual observatory will also provide links to other available lunar data. Selected data analysis (e.g., OMNIWeb), orbital ephemeris (SSCWeb), and associated visualization tools of SPDF will be utilized in support of the modeling and virtual observatory efforts. Please contact the author for potential virtual observatory support of specific data products related to plasma interactions with the lunar surface and atmosphere.

  6. Comparison of the magnetic properties of glass from Luna 20 with similar properties of glass from the Apollo missions

    USGS Publications Warehouse

    Senftle, F.E.; Thorpe, A.N.; Alexander, C.C.; Briggs, C.L.

    1973-01-01

    Magnetic susceptibility measurements have been made on four glass spherules and fragments from the Luna 20 fines; two at 300??K and two from 300??K to 4??K. From these data the magnetic susceptibility extrapolated to infinite field, the magnetization at low fields and also the saturation magnetization at high fields, the Curie constant, the Weiss temperature, and the temperature-independent susceptibility were determined. Using a model previously proposed for the Apollo specimens, the Curie constant of the antiferromagnetic inclusions and a zero field splitting parameter were calculated for the same specimens. The data show the relatively low concentration of iron in all forms in these specimens. In addition, the Weiss temperature is lower than that measured for the Apollo specimens, and can be attributed almost entirely to the ligand field distortion about the Fe2+ ions in the glassy phase. The data further suggest that the Luna 20 specimens cooled more slowly than those of the Apollo missions, and that some of the antiferromagnetic inclusions in the glass may have crystallized from the glass during cooling. ?? 1973.

  7. A lunar differentiation model in light of new chemical data on Luna 20 and Apollo 16 soils.

    NASA Technical Reports Server (NTRS)

    Nava, D. F.; Philpotts, J. A.

    1973-01-01

    Fines from a Luna 20 soil sample and from three Apollo 16 deep drill core samples have been analyzed for major-minor element abundances by a combined, semi-micro atomic absorption spectrophotometric and colorimetric method. Both the major element and large ion lithophile trace element abundances in these soils, the first from interior highland sites, are greatly influenced by the very high normative plagioclase content, being distinctly richer in Al and Ca, and poorer in K, P, Cr, Mn, Fe, and Ti, than most bulk soil samples from previous lunar missions. The relatively large compositional variations in the Apollo 16 core can be ascribed almost entirely to decreasing plagioclase with increasing depth. The chemical composition of the Luna 20 soil indicates less plagioclase and less KREEP than in the Apollo 16 soils. A lunar differentiation model is presented in which is made the suggestion that KREEP is the result of a second fusion event in a lunar crust consisting of early feldspathic cumulates and primary aluminous 'liquid.'

  8. Wrinkle ridges, reverse faulting, and the depth penetration of lithospheric stress in lunae planum, Mars

    NASA Technical Reports Server (NTRS)

    Zuber, M. T.

    1993-01-01

    Tectonic features on a planetary surface are commonly used as constraints on models to determine the state of stress at the time the features formed. Quantitative global stress models applied to understand the formation of the Tharsis province on Mars constrained by observed tectonics have calculated stresses at the surface of a thin elastic shell and have neglected the role of vertical structure in influencing the predicted pattern of surface deformation. Wrinkle ridges in the Lunae Planum region of Mars form a conentric pattern of regularly spaced features in the eastern and southeastern part of Tharsis; they are formed due to compressional stresses related to the response of the Martian lithosphere to the Tharsis bulge. As observed in the exposures of valley walls in areas such as the Kasei Valles, the surface plains unit is underlain by an unconsolidated impact-generated megaregolith that grades with depth into structurally competent lithospheric basement. The ridges have alternatively been hypothesized to reflect deformation restricted to the surface plains unit ('thin skinned deformation') and deformation that includes the surface unit, megaregolith and basement lithosphere ('thick skinned deformation'). We have adopted a finite element approach to quantify the nature of deformation associated with the development of wrinkle ridges in a vertically stratified elastic lithosphere. We used the program TECTON, which contains a slippery node capability that allowed us to explicitly take into account the presence of reverse faults believed to be associated with the ridges. In this study we focused on the strain field in the vicinity of a single ridge when slip occurs along the fault. We considered two initial model geometries. In the first, the reverse fault was assumed to be in the surface plains unit, and in the second the initial fault was located in lithospheric basement, immediately beneath the weak megaregolith. We are interested in the conditions underwhich

  9. Oriented chromite-diopside symplectic inclusions in olivine from lunar regolith delivered by "Luna-24" mission

    NASA Astrophysics Data System (ADS)

    Khisina, N. R.; Wirth, R.; Abart, R.; Rhede, D.; Heinrich, W.

    2013-03-01

    Calcium-chromium rich lamellae in olivine grain No. 1611 from the Luna-24 regolith were studied with FEG-EMPA and TEM. The lamellae consist of a worm-like intergrowth of FeCr2O4 chromite (Chr) and CaMgSi2O6 diopside (Di), with a Chr:Di modal proportion of 1:3. The linear extension of the lamellae and crystallographic orientation relationships among the symplectite phases and the olivine suggest that the lamellae nucleated at deformation defects in the olivine host. Calcium depletion haloes surrounding the lamellae amount to about 75 μm and indicate that the chromite + diopside lamellae were formed by segregation of calcium and chromium from the host olivine into the lamellae without addition of calcium and/or chromium from outside the olivine. The segregation of calcium and chromium and, consequently, the growth of the symplectic lamellae were diffusion-controlled. The segregation of a calcium-chromium component from the host olivine was associated with oxidation of divalent to trivalent chromium. Oxidation was facilitated by dehydrogenation, which was driven by decompression and/or a change in redox potential. Hydrogen point defects in the original olivine with H+ substituting for divalent cations on the M-sites provided the necessary electron acceptors for the oxidation of chromium and after electron transfer left olivine as molecular H2. The internal microstructure of the lamellae suggests that exsolution of the calcium-chromium rich lamellae from the host olivine and formation of the chromite-diopside symplectic intergrowth occurred simultaneously. The time scale derived from diffusion modeling of the calcium depletion haloes around the lamellae indicates a thermal event on the order of several months to several hundred years at most. Symplectic inclusions found in olivine from lunar, martian and terrestrial rocks are similar with respect to their shape, crystallographic orientation relationships, and internal microstructure of the spinel

  10. Bimodal TiO2 Contents of Mare Basalts at Apollo and Luna Sites and Implications for TiO2 Derived from Clementine Spectral Reflectance

    NASA Technical Reports Server (NTRS)

    Gillis, J. J.; Jolliff, B. L.

    2001-01-01

    A revised algorithm to estimate Ti contents of mare regions centered on Apollo and Luna sites shows a bimodal distribution, consistent with mare-basalt sample data. A global TiO2 map shows abundant intermediate TiO2 basalts in western Procellarum. Additional information is contained in the original extended abstract.

  11. Bimodal TiO2 Contents of Mare Basalts at Apollo and Luna Sites and Implications for TiO2 Derived from Clementine Spectral Reflectance

    NASA Technical Reports Server (NTRS)

    Gillis, J. J.; Jolliff, B. L.

    2001-01-01

    A revised algorithm to estimate Ti contents of mare regions centered on Apollo and Luna sites shows a bimodal distribution, consistent with mare-basalt sample data. A global TiO2 map shows abundant intermediate TiO2 basalts in western Procellarum. Additional information is contained in the original extended abstract.

  12. Chemistry and petrology of Luna 24 lithic fragments and less than 250-micron soils - Constraints on the origin of VLT mare basalts

    NASA Technical Reports Server (NTRS)

    Ma, M.-S.; Schmitt, R. A.; Taylor, G. J.; Warner, R. D.; Lange, D. E.; Keil, K.

    1978-01-01

    Results are reported on a combined INAA-petrologic study of 17 small (0.2-1.5 mg) Luna 24 lithic and mineral fragments and INAA study of 5 bulk soils and mineral separates from gabbro 24170. Lithic and mineral fragments are classified into VLT mare basalts (ferrobasalt and metabasalts), low-Ti, variolitic mare basalt, gabbros, melt rock and soil breccia. Data indicate 5 possible magma types, represented by: (1) VLT ferrobasalt and gabbro fragments, with low-TiO2 (about 1%), slightly bow-shaped REE pattern, and low REE concentrations (5-10X chondritic); (2) a ferrobasalt (Laul et al., 1978) and metabasalt fragments with major and trace element contents similar to (1), but positive Eu anomalies; (3) one gabbro fragment with distinctive pyroxene compositional trend (increasing Ti with nearly constant Fe/Fe + Mg) and highest REE contents of any Luna 24 mare basaltic sample, (4) a gabbro fragment with considerably less V and Cr2O3 than ferrobasalt and metabasalt fragments; and (5) variolitic basalt fragment with higher Ti2(2.3%) than other Luna 24 basalts and pyroxene that has increasing then decreasing Ti with increasing Fe/Fe + Mg. Trace element data place constraints on the nature of the source region and possible parent magmas for the Luna 24 VLT ferrobasalt.

  13. Chemistry and petrology of Luna 24 lithic fragments and less than 250-micron soils - Constraints on the origin of VLT mare basalts

    NASA Technical Reports Server (NTRS)

    Ma, M.-S.; Schmitt, R. A.; Taylor, G. J.; Warner, R. D.; Lange, D. E.; Keil, K.

    1978-01-01

    Results are reported on a combined INAA-petrologic study of 17 small (0.2-1.5 mg) Luna 24 lithic and mineral fragments and INAA study of 5 bulk soils and mineral separates from gabbro 24170. Lithic and mineral fragments are classified into VLT mare basalts (ferrobasalt and metabasalts), low-Ti, variolitic mare basalt, gabbros, melt rock and soil breccia. Data indicate 5 possible magma types, represented by: (1) VLT ferrobasalt and gabbro fragments, with low-TiO2 (about 1%), slightly bow-shaped REE pattern, and low REE concentrations (5-10X chondritic); (2) a ferrobasalt (Laul et al., 1978) and metabasalt fragments with major and trace element contents similar to (1), but positive Eu anomalies; (3) one gabbro fragment with distinctive pyroxene compositional trend (increasing Ti with nearly constant Fe/Fe + Mg) and highest REE contents of any Luna 24 mare basaltic sample, (4) a gabbro fragment with considerably less V and Cr2O3 than ferrobasalt and metabasalt fragments; and (5) variolitic basalt fragment with higher Ti2(2.3%) than other Luna 24 basalts and pyroxene that has increasing then decreasing Ti with increasing Fe/Fe + Mg. Trace element data place constraints on the nature of the source region and possible parent magmas for the Luna 24 VLT ferrobasalt.

  14. A computer procedure to analyze seismic data to estimate outcome probabilities in oil exploration, with an initial application in the tabasco region of southeastern Mexico

    NASA Astrophysics Data System (ADS)

    Berlanga, Juan M.; Harbaugh, John W.

    The Tabasco region contains a number of major oilfields, including some of the emerging "giant" oil fields which have received extensive publicity. Fields in the Tabasco region are associated with large geologic structures which are detected readily by seismic surveys. The structures seem to be associated with deepseated movement of salt, and they are complexly faulted. Some structures have as much as 1000 milliseconds relief of seismic lines. A study, interpreting the structure of the area, used initially only a fraction of the total seismic lines That part of Tabasco region that has been studied was surveyed with a close-spaced rectilinear network of seismic lines. A, interpreting the structure of the area, used initially only a fraction of the total seismic data available. The purpose was to compare "predictions" of reflection time based on widely spaced seismic lines, with "results" obtained along more closely spaced lines. This process of comparison simulates the sequence of events in which a reconnaissance network of seismic lines is used to guide a succession of progressively more closely spaced lines. A square gridwork was established with lines spaced at 10 km intervals, and using machine contour maps, compared the results with those obtained with seismic grids employing spacings of 5 and 2.5 km respectively. The comparisons of predictions based on widely spaced lines with observations along closely spaced lines provide information by which an error function can be established. The error at any point can be defined as the difference between the predicted value for that point, and the subsequently observed value at that point. Residuals obtained by fitting third-degree polynomial trend surfaces were used for comparison. The root mean square of the error measurement, (expressed in seconds or milliseconds reflection time) was found to increase more or less linearly with distance from the nearest seismic point. Oil-occurrence probabilities were established on

  15. Boguslawsky crater, Moon: Geology of the Luna-Glob Landing Site

    NASA Astrophysics Data System (ADS)

    Hiesinger, Harald; Ivanov, Mikhail; Hendrik Paskert, Jan; Bauch, Karin; Howes van der Bogert, Carolyn

    2014-05-01

    The floor of crater Boguslawsky (~95 km in diameter, centered at 72.9S, 43.26E) was selected as the primary landing site for the Russian Luna-Glob mission. Two landing ellipses, 30x15 km each, were chosen on the floor of the crater: Ellipse West is at 72.9S, 41.3E; Ellipse East is at 73.3S, 43.9E. Using high-resolution LROC images, we identified six geologic units within Boguslawsky crater, including smooth plains sp, rolling plains rp, secondary craters sc, a hilly unit hu, the crater wall cw, and the ejecta blanket eb of the 24-km sized crater Boguslawsky D. Units sp, rp, sc, hu, and possibly cw are accessible within the western landing ellipse. The eastern landing ellipse contains units sp, rp, eb, and sc. Based on our crater size-frequency distribution (CSFD) measurements and using the lunar production function and chronology of [1], we find Boguslawsky crater formed approximately 4 Ga ago. Because this age was derived from a count area on the western crater wall, which might have been modified by mass wasting, it represents a minimum age, i.e., the crater might be older. Applying the stratigraphy of [2], Bouguslawsky is pre-Nectarian in age, consistent with the age assignment of the geologic map [3]. Our CSFD results indicate that the rolling plains have an absolute model age of about 3.96 Ga old, thus being indistinguishable within the error bars from the CSFD of the Boguslawsky wall. The smooth plains and the ejecta blanket of Boguslawsky D exhibit very similar absolute model ages of 3.77 and 3.74 Ga, respectively. Thus, our ages for the crater floor are somewhat younger than the ages in the geologic map of [3] while Boguslawsky D appears to be older, i.e., it is Imbrian in age and not Eratosthenian as shown in [3]. To assess the safety of the landing ellipses, we studied the distribution of slopes and boulders. Within the two proposed landing sites, we find that the slopes at ~30m base-length are generally less than 5-10 degrees. However, local slopes

  16. X-LUNA: Extending Free/Open Source Real Time Executive for On-Board Space Applications

    NASA Astrophysics Data System (ADS)

    Braga, P.; Henriques, L.; Zulianello, M.

    2008-08-01

    In this paper we present xLuna, a system based on the RTEMS [1] Real-Time Operating System that is able to run on demand a GNU/Linux Operating System [2] as RTEMS' lowest priority task. Linux runs in user-mode and in a different memory partition. This allows running Hard Real-Time tasks and Linux applications on the same system sharing the Hardware resources while keeping a safe isolation and the Real-Time characteristics of RTEMS. Communication between both Systems is possible through a loose coupled mechanism based on message queues. Currently only SPARC LEON2 processor with Memory Management Unit (MMU) is supported. The advantage in having two isolated systems is that non critical components are quickly developed or simply ported reducing time-to-market and budget.

  17. Heat-physical properties of lunar surface material returned to earth by the Luna 16 automatic station

    NASA Technical Reports Server (NTRS)

    Avduyevskiy, V. S.; Anfimov, N. A.; Marov, M. Y.; Treskin, Y. A.; Shalayev, S. P.; Ekonomov, A. P.

    1974-01-01

    Density, specific heat capacity, and coefficient of thermal conductivity were studied on a sample of lunar surface material returned by the Luna 16 automatic station. The study was carried out in a helium-filled chamber. The density of the surface material when freely heaped was 1.2 g/cu cm, and when shaken down -- 1.7 g/cu cm. The specific heat capacity was 0.177 + or - 0.010 cal x g/1 x deg/1. The coefficient of thermal conductivity in the material was 4.8 x 10/6 + or - 1.2 x 10/6 cal x cm/1 x sec/1 x deg/1.

  18. Pb-207/Pb-206 ages of individual mineral phases in Luna 20 material by ion microprobe mass analysis.

    NASA Technical Reports Server (NTRS)

    Andersen, C. A.; Hinthorne, J. R.

    1973-01-01

    Ion microprobe analyses of returned lunar material have helped to demonstrate that U, Th, and radiogenic Pb are concentrated in small accessory mineral phases. It is possible to measure the isotopic composition of this Pb and obtain a radiometric Pb-207/Pb-206 age for the mineral. The ages so derived compare favorably with crystallization ages determined by conventional methods. A grain mount (22003,2/6) of Luna 20 material was searched for such accessory mineral phases, and two were found. One of these phases give an age of 4.12 plus or minus 0.04 b.y. and the other an age of 4.42 plus or minus 0.11 b.y. Ages of minerals dated by the ion probe in Apollo samples 14310 and 15555 are given for comparison. Data on the upper limit for Pb concentration in the outermost surface layers of free lunar soil particles are also given.

  19. Reverse color sequence in the diffraction of white light by the wing of the male butterfly Pierella luna (Nymphalidae: Satyrinae).

    PubMed

    Vigneron, Jean Pol; Simonis, Priscilla; Aiello, Annette; Bay, Annick; Windsor, Donald M; Colomer, Jean-François; Rassart, Marie

    2010-08-01

    The butterfly Pierella luna (Nymphalidae) shows an intriguing rainbow iridescence effect: the forewings of the male, when illuminated along the axis from the body to the wing tip, decompose a white light beam as a diffraction grating would do. Violet light, however, emerges along a grazing angle, near the wing surface, while the other colors, from blue to red, exit respectively at angles progressively closer to the direction perpendicular to the wing plane. This sequence is the reverse of the usual decomposition of light by a grating with a periodicity parallel to the wing surface. It is shown that this effect is produced by a macroscopic deformation of the entire scale, which curls in such a way that it forms a "vertical" grating, perpendicular to the wing surface, and functions in transmission instead of reflection.

  20. Pb-207/Pb-206 ages of individual mineral phases in Luna 20 material by ion microprobe mass analysis.

    NASA Technical Reports Server (NTRS)

    Andersen, C. A.; Hinthorne, J. R.

    1973-01-01

    Ion microprobe analyses of returned lunar material have helped to demonstrate that U, Th, and radiogenic Pb are concentrated in small accessory mineral phases. It is possible to measure the isotopic composition of this Pb and obtain a radiometric Pb-207/Pb-206 age for the mineral. The ages so derived compare favorably with crystallization ages determined by conventional methods. A grain mount (22003,2/6) of Luna 20 material was searched for such accessory mineral phases, and two were found. One of these phases give an age of 4.12 plus or minus 0.04 b.y. and the other an age of 4.42 plus or minus 0.11 b.y. Ages of minerals dated by the ion probe in Apollo samples 14310 and 15555 are given for comparison. Data on the upper limit for Pb concentration in the outermost surface layers of free lunar soil particles are also given.

  1. Exploring the {sup 22}Ne(p,γ){sup 23}Na reaction at LUNA and at HZDR

    SciTech Connect

    Cavanna, Francesca; Collaboration: LUNA Collaboration

    2014-05-09

    The {sup 22}Ne(p,γ){sup 23}Na reaction is involved in the hydrogen burning NeNa cycle. This determines the nucleosynthesis of the Ne and Na isotopes in the Red Giant Branch and Asymptotic Giant Branch phases of stellar evolution. In the energy range relevant for astrophysics (20 keV < E < 600 keV), the {sup 22}Ne(p,γ){sup 23}Na reaction rate is highly uncertain because of the contribution of a large number of resonances never measured directly. A related study is under preparation at the Laboratory for Underground Nuclear Astrophysics (LUNA), in the Gran Sasso National Laboratory, and it will cover the energy range 100 keV < E < 400 keV. Meanwhile, a measurement at higher energies (i.e. 436 keV) has been carried out at the Tandetron accelerator of the HZDR (Helmholtz Zentrum Dresden Rossendorf) in Germany. Some preliminary results will be presented.

  2. Ar-39-Ar-40 and petrologic study of Luna 24 samples 24077,13 and 24077,63

    NASA Technical Reports Server (NTRS)

    Schaeffer, O. A.; Bence, A. E.; Eichhorn, G.; Papike, J. J.; Vaniman, D. T.

    1978-01-01

    The ferrogabbro 24077,13, with pyroxene and plagioclase major and minor element chemical ranges comparable to the dominant ferrogabbro component in the Luna 24 core, has a Ar-39-Ar-40 temperature release age of 3.33 plus or minus 0.21 billion years. The metaferrobasalt 24077,63 is very fine-grained with a texture and mineralogy consistent with contact metamorphism between superimposed basalt flows or within a single flow. The Ar-39-Ar-40 plateau age of 24077,63 is 3.26 plus or minus 0.4 billion years. The basalt flows in Mare Crisium are about the same age as those of Mare Imbrium and younger than those of Mare Tranquillitatis and Mare Serenitatis.

  3. Legal aspects and technical alternatives for the treatment of reservoir brines at the Activo Luna oilfield, Mexico.

    PubMed

    Birkle, Peter; Cid Vázquez, Adolfo L; Fong Aguilar, J L

    2005-01-01

    Deep formation water, extracted as an undesired byproduct from on-shore production wells at the Activo Luna oilfield and processed in adjacent oil fields, are highly enriched in salt minerals, especially in sodium chloride (NaCl) (262 000 mg/L), but also in metals and nonmetals, such as strontium (Sr) (2068 mg/L), bromine (Br) (2034 mg/L), boron (B) (396 mg/ L), iodine (I) (43.4 mg/L), selenium (Se) (3.74 mg/L), and arsenic (As) (0.55 mg/L). Direct reinjection of the brine underground is not possible because of elevated pressure conditions within the petroleum reservoir. The disposal into near shore areas of the Gulf of Mexico without treatment must be rejected because of a) elevated concentrations of some toxic elements, such as B, silver (Ag), thallium (Tl), Se and cadmium (Cd), which exceed permissible limits of environmental legislation for surface discharge (Official Mexican norms NOM-001-ECOL-1998 and CE-CCA-001/89), and b) differences in density that could cause the descent of hypersaline fluid to the ocean floor, potentially affecting the diversity and survival of the benthic ecosystem. Conventional treatment techniques, such as microfiltration or reverse osmosis, are not suitable for the Activo Luna brines because of their extreme mineralization, which will cause pressure conditions exceeding 200 bars across the membrane. As an alternative process, the evaporation of the entire brine volume of approximately 200 m3/day by solar ponds or industrial crystallization plants is suggested. The residual precipitated residuals are composed mainly of chlorine (Cl) (9460 tons/year), sodium (Na) (4230 tons/ year), calcium (Ca) (1028 tons/year), potassium (K) (207 tons/year), and magnesium (Mg) (65.8 tons/year). As an alternative to its disposal on a dumpsite, some special minerals (especially NaCl, Mg, Sr, and Br) could be recovered for its economic value.

  4. Only White Matter Hyperintensities Predicts Post-Stroke Cognitive Performances Among Cerebral Small Vessel Disease Markers: Results from the TABASCO Study.

    PubMed

    Molad, Jeremy; Kliper, Efrat; Korczyn, Amos D; Ben Assayag, Einor; Ben Bashat, Dafna; Shenhar-Tsarfaty, Shani; Aizenstein, Orna; Shopin, Ludmila; Bornstein, Natan M; Auriel, Eitan

    2017-01-01

    White matter hyperintensities (WMH) were shown to predict cognitive decline following stroke or transient ischemic attack (TIA). However, WMH are only one among other radiological markers of cerebral small vessel disease (SVD). The aim of this study was to determine whether adding other SVD markers to WMH improves prediction of post-stroke cognitive performances. Consecutive first-ever stroke or TIA patients (n = 266) from the Tel Aviv Acute Brain Stroke Cohort (TABASCO) study were enrolled. MRI scans were performed within seven days of stroke onset. We evaluated the relationship between cognitive performances one year following stroke, and previously suggested total SVD burden score including WMH, lacunes, cerebral microbleeds (CMB), and perivascular spaces (PVS). Significant negative associations were found between WMH and cognition (p < 0.05). Adding other SVD markers (lacunes, CMB, PVS) to WMH did not improve predication of post-stroke cognitive performances. Negative correlations between SVD burden score and cognitive scores were observed for global cognitive, memory, and visual spatial scores (all p < 0.05). However, following an adjustment for confounders, no associations remained significant. WMH score was associated with poor post-stroke cognitive performance. Adding other SVD markers or SVD burden score, however, did not improve prediction.

  5. Ground-penetrating radar for sedimentology: methodological advances and examples from the Usumacinta-Grijalva delta plain, Tabasco, México

    NASA Astrophysics Data System (ADS)

    Van Dam, Remke; Nooren, Kees; Dogan, Mine; Hoek, Wim

    2014-05-01

    Ground-penetrating radar (GPR) is widely used as a tool for imaging sedimentary structures and reconstructing depositional history in a range of settings. Most GPR systems use a pair of dipole antennas to transmit and receive electromagnetic energy, typically in the frequency range of 0.025-1 GHz. Radar reflections result from contrasts in dielectric properties, which can be induced by small textural variations between layers. To generate cross sections of the subsurface, the common-offset antenna pair is moved along surface transects. The GPR method benefits from its relative ease of use and relatively limited basic processing that is required for interpretation of field data. Drawbacks include the high signal attenuation in electrically conductive material such as clay and the trade-off between penetration depth and resolution for different antenna frequencies. In recent years, various equipment advances and novel field practices and processing strategies have improved the ability of GPR to provide high-resolution data in a wider range of settings and scenarios. Advances include multi-channel systems for more efficient data collection, multi-offset data collection and processing for improved signal-to-noise ratios, full-resolution and multi-component imaging, and full-waveform inversion. In this presentation, we will discuss some of these methodological advances and present full-resolution field data from a highly heterogeneous fluvial site in Mississippi, USA. We will also present GPR data from a project focused on reconstructing depositional history of the Usumacinta-Grijalva delta in Tabasco, México, which is the world's largest beach ridge plain. Here we used common-offset GPR antenna pairs at two frequencies to assess the varying thickness of the eolian cover of individual beach ridges. We also characterized systematic changes in the dip of beach face and foreshore deposits to study its possible relation with temporal changes in coastal processes.

  6. Preliminary results of determinations of the physical properties of microfragments of lunar rocks in soil samples from Luna-24

    NASA Astrophysics Data System (ADS)

    Turchaninov, I. A.; Medvedev, R. V.; Chashnikov, V. V.

    1980-05-01

    Results of a preliminary investigation of the densities and physical and mechanical properties of individual lunar regolith particles of sizes 0.37-0.9 mm brought back in Luna 24 samples are presented. Densities, determined by the constant-temperature immersion method, are found to range between 3.17-3.26 g/cu cm for the basalt particles, 2.93-3.26 g/cu cm for the gabbros and 2.97-3.06 g/cu cm for the breccias. Particle moduli of longitudinal elasticity, determined on the basis of solid collisions, are observed to vary from 4.0 x 10 to the 10th to 9.2 x 10 to the 10th Pa. Calculations based on correlation dependences indicate heat capacities from 0.74 to 1.04 kJ/kg K and strength limitations from 1200 to 1800 x 10 to the 5th Pa. The results obtained for the microsamples are noted to be comparable to those obtained for lunar rocks and clearly different from those of their terrestrial analogs.

  7. The LuNa project: experimental didactic modules exploiting portable setups to teach optics in primary and secondary schools

    NASA Astrophysics Data System (ADS)

    Bondani, Maria; Allevi, Alessia; Nardo, Luca; Favale, Fabrizio

    2014-07-01

    The "LuNa" (La natura della Luce nella luce della Natura - The nature of Light in the light of Nature) Project is devoted to the experimental teaching of optics in the different school grades. The basic idea of the Project is that the history of optics and the debate about the nature of light are a meaningful example of how science proceeds in the development of a physical model. Moreover optical phenomena can be presented at different levels of complexity in order to be accessible to students of different age. At the core of the Project are several portable setups that support experimental and partially interactive lectures covering all the aspects of optical phenomena, from geometrical optics to single-photon interference passing through atmospheric optics, spectroscopy, holography and theory of perception. When possible, the setups are realized with simple and easy to find materials so as to be reproducible by teachers and students. Of course, for the most complicated setups (interferometers and holography) research materials are used. Each module is calibrated to fit teachers' requirements either to be included in the curricula of their classes or to be used as an expansion of the optics program.

  8. Response to the Fernández-Niño Comments on Hernández-Alvarado et al. Increase in Suicide Rates by Hanging in the Population of Tabasco, México between 2003 and 2012. Int. J. Environ. Res. Public Health 2016, 13, 552.

    PubMed

    Hernández-Alvarado, Mervyn Manuel; González-Castro, Thelma Beatriz; Tovilla-Zárate, Carlos Alfonso; Fresán, Ana; Juárez-Rojop, Isela E; López-Narváez, María Lilia; Villar-Soto, Mario; Genis-Mendoza, Alma

    2016-07-01

    We thank the comments of Fernández-Niño [1] addressing our article [2] "Increase in Suicide Rates by Hanging in the Population of Tabasco, Mexico between 2003 and 2012", which pointed out that the use of the epidemiological concept "prevalence" is not correctly applied in the present manuscript.

  9. 22Ne and 23Na ejecta from intermediate-mass stars: the impact of the new LUNA rate for 22Ne(p, γ)23Na

    NASA Astrophysics Data System (ADS)

    Slemer, A.; Marigo, P.; Piatti, D.; Aliotta, M.; Bemmerer, D.; Best, A.; Boeltzig, A.; Bressan, A.; Broggini, C.; Bruno, C. G.; Caciolli, A.; Cavanna, F.; Ciani, G. F.; Corvisiero, P.; Davinson, T.; Depalo, R.; Di Leva, A.; Elekes, Z.; Ferraro, F.; Formicola, A.; Fülöp, Zs.; Gervino, G.; Guglielmetti, A.; Gustavino, C.; Gyürky, G.; Imbriani, G.; Junker, M.; Menegazzo, R.; Mossa, V.; Pantaleo, F. R.; Prati, P.; Straniero, O.; Szücs, T.; Takács, M. P.; Trezzi, D.

    2017-03-01

    We investigate the impact of the new LUNA rate for the nuclear reaction 22Ne(p, γ)23Na on the chemical ejecta of intermediate-mass stars, with particular focus on the thermally pulsing asymptotic giant branch (TP-AGB) stars that experience hot-bottom burning. To this aim, we use the PARSEC and COLIBRI codes to compute the complete evolution, from the pre-main sequence up to the termination of the TP-AGB phase, of a set of stellar models with initial masses in the range 3.0-6.0 M⊙ and metallicities Zi = 0.0005, 0.006 and 0.014. We find that the new LUNA measures have much reduced the nuclear uncertainties of the 22Ne and 23Na AGB ejecta that drop from factors of ≃10 to only a factor of few for the lowest metallicity models. Relying on the most recent estimations for the destruction rate of 23Na, the uncertainties that still affect the 22Ne and 23Na AGB ejecta are mainly dominated by the evolutionary aspects (efficiency of mass-loss, third dredge-up, convection). Finally, we discuss how the LUNA results impact on the hypothesis that invokes massive AGB stars as the main agents of the observed O-Na anticorrelation in Galactic globular clusters. We derive quantitative indications on the efficiencies of key physical processes (mass-loss, third dredge-up, sodium destruction) in order to simultaneously reproduce both the Na-rich, O-poor extreme of the anticorrelation and the observational constraints on the CNO abundance. Results for the corresponding chemical ejecta are made publicly available.

  10. Isotope studies of carbonate rocks of La Luna Formation (Venezuela) to constrain the oceanic anoxic event 3 (OAE3)

    NASA Astrophysics Data System (ADS)

    Machado, M. C.; Chemale, F., Jr.; Kawashita, K.; Rey, O.; Moura, C. A. V.

    2016-12-01

    87Sr/86Sr ratios, δ13C, and δ18O determinations performed on 30 bulk carbonate rocks are presented to constrain the isotope characteristics regarding Oceanic Anoxic Event 3 in the La Luna Formation, Maracaibo Basin. The samples were collected along a 22 m profile in San Miguel region (Merida State, Venezuela). The exhibited 87Sr/86Sr ratios are between 0.707659, at the base, and 0.707733 at the top of studied section, corresponding estimated younger numerical ages than the inferred ages dated as Santonian (85.8-83.5 Ma) based on occurrence of Dicarinella asymetrica. The obtained 87Sr/86Sr ratios are certainly higher than expected for Santonian sea Sr and they are attributed to regular riverine strontium fluxes in the restricted (gulf-like) Maracaibo Basin. The values of δ18O data between -3.76‰ and -11.76‰ are distributed in two distinct clusters in a same way and coherent as for δ13C data which are in a range between -1.75‰ and -13.87‰. One of the clusters δ13C = -2.5 ± 1.0‰ and δ18O = -10.0 ± 1.5‰), illustrate the homogeneous marine deposition under tropical conditions, while the other, more variable, probably could reflect the cyclicity of temporally changes in Pacific versus Atlantic Ocean circulation with cooling water or cooling trend climate. These δ13C values around -2.5 ± 1.0‰ do not fit with the significant carbon isotope excursion as expected for the oceanic anoxic event (OAE) and support the work hypothesis that Coniacian-Santonian anoxic event (denominate as OAE3) is not a global one.

  11. Pressurized groundwater systems in Lunae and Ophir Plana (Mars): insights from small-scale morphology and experiments

    NASA Astrophysics Data System (ADS)

    Marra, Wouter A.; Kleinhans, Maarten G.; de Jong, Steven M.; Hauber, Ernst

    2015-04-01

    Large outflow channels on Mars reveal the past presence of water on the surface, possibly released from pressurized groundwater reservoirs. Due to a lack of understanding of the underlying processes, the hydrological and corresponding climate conditions remain a subject of debate. We investigate the detailed morphology of possible pressurized groundwater outflow systems in comparison to landscape evolution experiments. These experiments show that incised valleys like the classic outflow channels are a last erosional stage in morphological development. This is preceded by the formation of sedimentary lobes due to rapid water loss by infiltration. On Mars, we observed similar features related to different stages of groundwater outflow in Lunae and Ophir Plana, which form parts of the high standing plateaus adjacent to the huge depressions of the Valles Marineris. In both the experiment and the Martian cases, we observed lobate depositions that emerge from collapsed pits and pit chains. These lobes have channelized surfaces related to fluvial flow. In the experiments, pits formed adjacent to the valley heads due to the outflow. The pits in the source regions of Mars strongly relate to the regional tectonic structure and likely result from subsidence by extension and not by groundwater alone. Faulting, subsidence and collapse likely triggered outflow from a pressurized aquifer and could have aided in aquifer pressurization. This scenario is consistent with the presence of one or several cryosphere-confined aquifers from the Early Hesperian to at least the middle Amazonian. A pronounced spatial trend of larger and further developed outflow systems at lower elevations suggests that features ranging from small lobes to large outflow channels were sourced from a common aquifer or from aquifers with similar pressures. The required cryosphere indicates a cold climate and enables groundwater outflow even under atmospheric conditions unfavorable for sustained presence of

  12. Current status of the habitat and population of the black howler monkey (Alouatta pigra) in Balancán, Tabasco, Mexico.

    PubMed

    Pozo-Montuy, Gilberto; Serio-Silva, Juan Carlos; Bonilla-Sánchez, Yadira M; Bynum, Nora; Landgrave, Rosario

    2008-12-01

    We evaluated the habitat and populations of the black howler monkey (Alouatta pigra) in the municipality of Balancán, Tabasco, southeastern Mexico, using a combination of field surveys and remotely sensed data. We identified 21,937 ha of remnant vegetation composed of 1,348 fragments. Fragments separated by up to 200 m were grouped into "clusters" of fragments in accordance with the maximum observed open distance crossed by A. pigra. A total of 11% or 84 of the 772 clusters identified through remote sensing were selected at random, and for these we determined the vegetation type, canopy height, area, and distance to the closest human settlement. In these same 84 clusters, which included a total area of 9,817 ha, from October to June of 2006 we located a total of 1,064 black howler monkeys, including 228 troops and 49 solitary monkeys. A. pigra was found in 62 (74.7%) of all clusters visited, with a cumulative area of 6,032 ha. Troops varied in size from 2 to 15 individuals (average 6.0+/-2.9 ind/troop). Adults were 67% (n=716) of detected individuals, whereas juveniles were 20.5% (n=218) and infants were 12.5% (n=133). We found black howlers to occur at an ecological density of 10.8 ind/km(2), which is low in comparison with A. pigra in other fragmented and conserved sites. We found a statistically significant relationship between the area of clusters and the abundance of howler monkeys (r(2)=0.2, F=10.47, gl=3, P=0.002). In addition, the probability of finding A. pigra was greater in secondary vegetation, riparian vegetation, tropical dry forest, undisturbed tropical oak forest, and palm forest (F=12, gl=3, P<0.0001), as compared with disturbed tropical oak forest. Our results provide data on the distribution, abundance, and population structure of black howler monkeys in a fragmented landscape in the southeast of Mexico. These data are a necessary prerequisite for conservation planning for this species.

  13. Depressive symptoms following stroke and transient ischemic attack: is it time for a more intensive treatment approach? results from the TABASCO cohort study.

    PubMed

    Tene, Oren; Shenhar-Tsarfaty, Shani; Korczyn, Amos D; Kliper, Efrat; Hallevi, Hen; Shopin, Ludmila; Auriel, Eitan; Mike, Anat; Bornstein, Natan M; Assayag, Einor Ben

    2016-05-01

    To examine whether depressive symptoms after a stroke or a transient ischemic attack (TIA) increase the risk of cognitive impairment and functional deterioration at 2-year follow-up. Participants were survivors of first-ever, mild-to-moderate ischemic stroke or TIA from the TABASCO prospective cohort study who underwent 3T magnetic resonance imaging and were examined by a multiprofessional team 6, 12, and 24 months after the event using direct interviews, depression scales, and neurologic, neuropsychological, and functional evaluations. The main outcome was the development of cognitive impairment, either mild cognitive impairment (MCI) or dementia. MCI was diagnosed by a decline on at least 1 cognitive domain (≥ 1.5 SD) of the Montreal Cognitive Assessment score and/or on the computerized neuropsychological battery, as compared with age- and education-matched published norms. Dementia was diagnosed by a consensus forum that included senior neurologists specializing in memory disorders and a neuropsychologist. Data were obtained from 306 consecutive eligible patients (mean age: 67.1 ± 10.0 years) who were admitted to the department of emergency medicine at the Tel Aviv Medical Center from April 1, 2008, to December 1, 2011, within 72 hours from onset of symptoms of TIA or stroke. Of these patients, 51 (16.7%) developed cognitive impairment during a 2-year follow-up. Multivariate regression analysis showed that a Geriatric Depression Scale (GDS) score ≥ 6 at admission and at 6 months after the event was a significant independent marker of cognitive impairment 2 years after the stroke/TIA (OR = 3.62, 95% CI, 1.01-13.00; OR = 3.68, 95% CI, 1.03-13.21, respectively). A higher GDS score at 6 months was also related to a worse functional outcome (P < .001). Our results support depression screening among stroke and TIA survivors as a tool to identify patients who are prone to have a worse cognitive and functional outcome. These patients may benefit from closer medical

  14. An investigation of the cosmic radiation in the vicinity of the moon on the Luna 10, 11, and 12 artificial lunar satellites

    NASA Technical Reports Server (NTRS)

    Grigorov, N. L.; Kurt, V. G.; Lutsenko, V. N.; Maduyev, V. L.; Pisarenko, N. F.; Savenko, I. A.

    1974-01-01

    Research on the primary cosmic radiation and solar cosmic rays from the Luna 10, 11, and 12 artificial lunar satellites is reviewed. Data on the vertical distribution of cosmic rays above the moon's surface are presented, and the albedo for the primary radiation is determined. The fluxes of electrons with energies from 30 to 300 keV were registered in the solar cosmic rays. Rapid variations of the electron flux were observed. The angular distributions of 0.5-10 MeV protons moving together with the corpuscular streams responsible for Forbush decreases were investigated.

  15. LUNA and the Sun

    SciTech Connect

    Broggini, Carlo; Collaboration: LUNA Collaboration

    2014-05-09

    One of the main ingredients of nuclear astrophysics is the knowledge of the thermonu-clear reactions responsible for the stellar luminosity and for the synthesis of the chemical elements. Deep underground in the Gran Sasso Laboratory the cross section of the key reactions of the proton-proton chain and of the Carbon-Nitrogen-Oxygen (CNO) cycle have been measured right down to the energies of astrophysical interest. The main results obtained in the past 20 years are reviewed and their influence on our understanding of the properties of the neutrino and the Sun is discussed.

  16. "Una Luna Brilla."

    ERIC Educational Resources Information Center

    Teaching Music, 2002

    2002-01-01

    Focuses on the "World's Largest Concerts" listing various songs to be sung by students. Includes teaching tips in the form of quotes from music teachers on aspects of music education, such as teaching rhythm. Includes information on how to access the songs. (CMK)

  17. Content of lithium, beryllium, boron, and titanium, and the isotopic composition of lithium, boron, and magnesium in Luna 16 regolith sample

    NASA Technical Reports Server (NTRS)

    Eugster, O.

    1974-01-01

    The abundance of the following elements in the L 16-19 No. 118 regolith sample, zone V was determined by isotopic dilution using a mass spectrometer equipped with a scattering ion source: Li -- 9.8, Be -- 1.2, Be -- 2.6, and Ti -- 1.92 percent. For comparison, these same elements were measured in samples of surface material returned by Apollo 11, Apollo 12, and Apollo 14, and in the terrestrial reference standard diabase W-1. The content of Li, Be, and B in the Luna 16 sample is nearly the same as in the Apollo 11 surface material. The surface material returned by Apollo 12 and Apollo 14 contains two to four times more of these elements. However, the abundance ratios of Li, Be, and B are remarkably similar in the surface materials from the four different lunar regions. With respect to basaltic achondrites and especially with respect to chondrites, the lunar basalts are enriched in Li, Be, and B up to 100 times.

  18. Prototype of the gas chromatograph-mass spectrometer to investigate volatile species in the lunar soil for the Luna-Resurs mission

    NASA Astrophysics Data System (ADS)

    Hofer, L.; Wurz, P.; Buch, A.; Cabane, M.; Coll, P.; Coscia, D.; Gerasimov, M.; Lasi, D.; Sapgir, A.; Szopa, C.; Tulej, M.

    2015-06-01

    In preparation for the Russian Luna-Resurs mission we combined our compact time-of-flight mass spectrometer (TOF-MS) with a chemical pre-separation of the species by gas chromatography (GC). Coupled measurements with both instruments were successfully performed with the prototype of the mass spectrometer and a flight-like gas chromatograph. The system was tested with two test gas mixtures, a mixture of hydrocarbons and a mixture of noble gases. Due to its capability to record mass spectra over the full mass range at once with high sensitivity and a dynamic range of up to 106 within 1 s, the TOF-MS system is a valuable extension of the GC analytical system. Based on the measurements with calibration gases performed with the combined GC-MS prototype and under assumption of mean characteristics for the Moon's regolith, the detection limit for volatile species in a soil sample is estimated to 2·10-10 by mass for hydrocarbons and 2·10-9 by mass for noble gases.

  19. Improved Direct Measurement of the 64.5 keV Resonance Strength in the 17O (p ,α )14N Reaction at LUNA

    NASA Astrophysics Data System (ADS)

    Bruno, C. G.; Scott, D. A.; Aliotta, M.; Formicola, A.; Best, A.; Boeltzig, A.; Bemmerer, D.; Broggini, C.; Caciolli, A.; Cavanna, F.; Ciani, G. F.; Corvisiero, P.; Davinson, T.; Depalo, R.; Di Leva, A.; Elekes, Z.; Ferraro, F.; Fülöp, Zs.; Gervino, G.; Guglielmetti, A.; Gustavino, C.; Gyürky, Gy.; Imbriani, G.; Junker, M.; Menegazzo, R.; Mossa, V.; Pantaleo, F. R.; Piatti, D.; Prati, P.; Somorjai, E.; Straniero, O.; Strieder, F.; Szücs, T.; Takács, M. P.; Trezzi, D.; LUNA Collaboration

    2016-09-01

    The 17O (p ,α ) 14N reaction plays a key role in various astrophysical scenarios, from asymptotic giant branch stars to classical novae. It affects the synthesis of rare isotopes such as 17O and 18F, which can provide constraints on astrophysical models. A new direct determination of the ER=64.5 keV resonance strength performed at the Laboratory for Underground Nuclear Astrophysics (LUNA) accelerator has led to the most accurate value to date ω γ =10.0 ±1. 4stat±0. 7syst neV , thanks to a significant background reduction underground and generally improved experimental conditions. The (bare) proton partial width of the corresponding state at Ex=5672 keV in 18F is Γp=35 ±5stat±3syst neV . This width is about a factor of 2 higher than previously estimated, thus leading to a factor of 2 increase in the 17O (p , α ) 14N reaction rate at astrophysical temperatures relevant to shell hydrogen burning in red giant and asymptotic giant branch stars. The new rate implies lower 17O/16O ratios, with important implications on the interpretation of astrophysical observables from these stars.

  20. Improved Direct Measurement of the 64.5 keV Resonance Strength in the ^{17}O(p,α)^{14}N Reaction at LUNA.

    PubMed

    Bruno, C G; Scott, D A; Aliotta, M; Formicola, A; Best, A; Boeltzig, A; Bemmerer, D; Broggini, C; Caciolli, A; Cavanna, F; Ciani, G F; Corvisiero, P; Davinson, T; Depalo, R; Di Leva, A; Elekes, Z; Ferraro, F; Fülöp, Zs; Gervino, G; Guglielmetti, A; Gustavino, C; Gyürky, Gy; Imbriani, G; Junker, M; Menegazzo, R; Mossa, V; Pantaleo, F R; Piatti, D; Prati, P; Somorjai, E; Straniero, O; Strieder, F; Szücs, T; Takács, M P; Trezzi, D

    2016-09-30

    The ^{17}O(p,α)^{14}N reaction plays a key role in various astrophysical scenarios, from asymptotic giant branch stars to classical novae. It affects the synthesis of rare isotopes such as ^{17}O and ^{18}F, which can provide constraints on astrophysical models. A new direct determination of the E_{R}=64.5  keV resonance strength performed at the Laboratory for Underground Nuclear Astrophysics (LUNA) accelerator has led to the most accurate value to date ωγ=10.0±1.4_{stat}±0.7_{syst}  neV, thanks to a significant background reduction underground and generally improved experimental conditions. The (bare) proton partial width of the corresponding state at E_{x}=5672  keV in ^{18}F is Γ_{p}=35±5_{stat}±3_{syst}  neV. This width is about a factor of 2 higher than previously estimated, thus leading to a factor of 2 increase in the ^{17}O(p, α)^{14}N reaction rate at astrophysical temperatures relevant to shell hydrogen burning in red giant and asymptotic giant branch stars. The new rate implies lower ^{17}O/^{16}O ratios, with important implications on the interpretation of astrophysical observables from these stars.

  1. Cartography of the Luna-21 landing site and Lunokhod-2 traverse area based on Lunar Reconnaissance Orbiter Camera images and surface archive TV-panoramas

    NASA Astrophysics Data System (ADS)

    Karachevtseva, I. P.; Kozlova, N. A.; Kokhanov, A. A.; Zubarev, A. E.; Nadezhdina, I. E.; Patratiy, V. D.; Konopikhin, A. A.; Basilevsky, A. T.; Abdrakhimov, A. M.; Oberst, J.; Haase, I.; Jolliff, B. L.; Plescia, J. B.; Robinson, M. S.

    2017-02-01

    The Lunar Reconnaissance Orbiter Camera (LROC) system consists of a Wide Angle Camera (WAC) and Narrow Angle Camera (NAC). NAC images (∼0.5 to 1.7 m/pixel) reveal details of the Luna-21 landing site and Lunokhod-2 traverse area. We derived a Digital Elevation Model (DEM) and an orthomosaic for the study region using photogrammetric stereo processing techniques with NAC images. The DEM and mosaic allowed us to analyze the topography and morphology of the landing site area and to map the Lunokhod-2 rover route. The total range of topographic elevation along the traverse was found to be less than 144 m; and the rover encountered slopes of up to 20°. With the orthomosaic tied to the lunar reference frame, we derived coordinates of the Lunokhod-2 landing module and overnight stop points. We identified the exact rover route by following its tracks and determined its total length as 39.16 km, more than was estimated during the mission (37 km), which until recently was a distance record for planetary robotic rovers held for more than 40 years.

  2. The optimisation of electrokinetic remediation for heavy metals and radioactivity contamination on Holyrood-Lunas soil (acrisol species) in Sri Gading Industrial Area, Batu Pahat, Johor, Malaysia.

    PubMed

    Mohamed Johar, S; Embong, Z

    2015-11-01

    The optimisation of electrokinetic remediation of an alluvial soil, locally named as Holyrood-Lunas from Sri Gading Industrial Area, Batu Pahat, Johor, Malaysia, had been conducted in this research. This particular soil was chosen due to its relatively high level of background radiation in a range between 139.2 and 539.4 nGy h(-1). As the background radiation is correlated to the amount of parent nuclides, (238)U and (232)Th, hence, a remediation technique, such as electrokinetic, is very useful in reducing these particular concentrations of heavy metal and radionuclides in soils. Several series of electrokinetics experiments were performed in laboratory scale in order to study the influence of certain electrokinetic parameters in soil. The concentration before (pre-electrokinetic) and after the experiment (post-electrokinetic) was determined via X-ray fluorescence (XRF) analysis technique. The best electrokinetic parameter that contributed to the highest achievable concentration removal of heavy metals and radionuclides on each experimental series was incorporated into a final electrokinetic experiment. Here, High Pure Germanium (HPGe) was used for radioactivity elemental analysis. The XRF results suggested that the most optimised electrokinetic parameters for Cr, Ni, Zn, As, Pb, Th and U were 3.0 h, 90 volts, 22.0 cm, plate-shaped electrode by 8 × 8 cm and in 1-D configuration order whereas the selected optimised electrokinetic parameters gave very low reduction of (238)U and (232)Th at 0.23 ± 2.64 and 2.74 ± 23.78 ppm, respectively. © The Author 2015. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oup.com.

  3. Neutron-induced background by an α-beam incident on a deuterium gas target and its implications for the study of the 2H(α,γ)6Li reaction at LUNA

    NASA Astrophysics Data System (ADS)

    Anders, M.; Trezzi, D.; Bellini, A.; Aliotta, M.; Bemmerer, D.; Broggini, C.; Caciolli, A.; Costantini, H.; Corvisiero, P.; Davinson, T.; Elekes, Z.; Erhard, M.; Formicola, A.; Fülöp, Zs.; Gervino, G.; Guglielmetti, A.; Gustavino, C.; Gyürky, Gy.; Junker, M.; Lemut, A.; Marta, M.; Mazzocchi, C.; Menegazzo, R.; Prati, P.; Rossi Alvarez, C.; Scott, D.; Somorjai, E.; Straniero, O.; Szücs, T.

    2013-02-01

    The production of the stable isotope 6Li in standard Big Bang nucleosynthesis has recently attracted much interest. Recent observations in metal-poor stars suggest that a cosmological 6Li plateau may exist. If true, this plateau would come in addition to the well-known Spite plateau of 7Li abundances and would point to a predominantly primordial origin of 6Li , contrary to the results of standard Big Bang nucleosynthesis calculations. Therefore, the nuclear physics underlying Big Bang 6Li production must be revisited. The main production channel for 6Li in the Big Bang is the 2H(α,γ)6Li reaction. The present work reports on neutron-induced effects in a high-purity germanium detector that were encountered in a new study of this reaction. In the experiment, an α-beam from the underground accelerator LUNA in Gran Sasso, Italy, and a windowless deuterium gas target are used. A low neutron flux is induced by energetic deuterons from elastic scattering and, subsequently, the 2H(d,n)3He reaction. Due to the ultra-low laboratory neutron background at LUNA, the effect of this weak flux of 2-3MeV neutrons on well-shielded high-purity germanium detectors has been studied in detail. Data have been taken at 280 and 400keV α-beam energy and for comparison also using an americium-beryllium neutron source.

  4. Geochemical signatures of bedded cherts of the upper La Luna Formation in Táchira State, western Venezuela: Assessing material provenance and paleodepositional setting

    NASA Astrophysics Data System (ADS)

    Garbán, G.; Martínez, M.; Márquez, G.; Rey, O.; Escobar, M.; Esquinas, N.

    2017-01-01

    Here we undertook an inorganic geochemical study of Cenomanian-Campanian bedded cherts (the Táchira Ftanita Member of the La Luna Formation) in the western region of the Táchira State, Venezuela. The aim of this study was to determine the paleo-oceanographic and paleo-environmental conditions that governed the deposition of chert beds and put forward a sedimentation model for the Táchira Ftanita Member in the study area. Seventy-two chert samples were collected and trace/rare earth elements (La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Rb, Cs, Th, U, Y, Co, and Sc) and major/trace elements (SiO2, TiO2, Al2O3, Fe2O3, MgO, CaO, Na2O, K2O, P2O5, Mn, Ba, Sr, Cr, Ni, and V) were determined by ICP-MS and ICP-OES, respectively. On the basis of the stratigraphic abundance and distribution of relatively immobile elements, as well as the distribution of rare earth elements, we established that the detrital sediments associated with the sequences studied have matching characteristics with distinct continental materials, with an intermediate composition, thus pointing to the Guayana Massif as the main source of sediments. In addition, we also determined the influence of hydrothermal input on the chemical composition of some cherts from La Molina Mine. On the basis of geochemistry, we found a biological influence regarding the uptake of dissolved silica for forming chert beds. The application of parameters for relatively immobile elements allowed us to establish a still proximal continental-margin (hemipelagic) for most samples from the Zorca River and a continental-margin for almost all the cherts from the Delicias-Villa Páez section and the remaining samples from La Molina Mine. Finally, we propose that the rhythmicity that accompanies the sequence of bedded cherts is related to changes in the intensity of upwelling patterns of water and/or to variability in the supply of silica dissolved in the Táchira sub-basin.

  5. Towards the study of 2H(p, γ)3He reaction in the Big Bang Nucleosynthesis energy range in LUNA

    NASA Astrophysics Data System (ADS)

    Kochanek, Izabela

    2016-04-01

    The Big Bang Nucleosynthesis began a few minutes after the Big Bang, when the Universe was sufficiently cold to allow deuterium nuclei to survive photo-disintegration. The total amount of deuterium produced in the Universe during the first minutes depends on the cosmological parameters (like the energy density in baryons, Ω bh 2, and the effective neutrino number, Neff ) and on the nuclear cross sections of the relevant reactions. The main source of uncertainty in the deuterium estimation comes from the 2H(p, γ)3He cross section. Measurements of Cosmic Microwave Background (CMB) anisotropies obtained by the Planck satellite are in very good agreement with the theoretical predictions of the minimal ΛCDM cosmological model, significantly reducing the uncertainty on its parameters. The Planck data allows to indirectly deduce with very high precision the abundances of primodial nuclides, such as the primodial deuterium fraction 2H/H = (2.65 ± 0.07) .10-5 (68% C.L.). The astrophysical observations in damped Lyman-a systems at high redshifts provide a second high accuracy measurement of the primodial abundance of deuterium 2H/H = (2.53 ± 0.04) · 10-5 (68% C.L.). The present experimental status on the astrophysical S-factor of the 2H(p, γ)3He reaction in the BBN energy range, gives a systematic uncertainties of 9%. Also the difference between ab-initio calculations and experimental values of S12 is at the level of 10%. In order to clarify the actual scenario, a measurement of 2H(p, γ)3He cross section with a precision of a few percent in the 70-400 keV energy range is planned at LUNA in 2016. A feasibility test of the measurement has been performed in October 2014, giving the preliminary results on the cross section. The experimental setup for the test and final measurement campaign will be presented.

  6. Spatial and size-frequency distributions of boulders on the floor of crater Boguslawsky, the primary target of the Luna-Glob mission.

    NASA Astrophysics Data System (ADS)

    Ivanov, Mikhail; Head, James; Hiesinger, Harald; Bazilevskiy, Alexander; Hendrik Pasckert, Jan; Bauch, Karin

    Crater Boguslawsky (73S, 44E) is the primary target for the lander-oriented Russian mission Luna-Glob. The rocky surfaces represent serious threats to landers. We have conducted a survey of the NAC images seeking for the rocky sites on the floor and assessing quantitative parameters of the size-frequency distributions (SFD) of boulders. Two craters on the Boguslawsky floor show abundant boulders in their surroundings. In the vicinity of Crater 1 (73.0S, 42.0E, 405 m), we have counted 9,000 rock fragments (1-13 m) at a radial distance <670 m outside the crater rim. The mean density of boulders in this zone is 76 rocks/10,000 m2. Boulders are arranged in elongated ray-like clusters. Shallow grooves (tracks) are associated with some larger boulders; the visible depth of the tracks is 0.3-0.5 m. There are 3,200 boulders (1-8 m) around Crater 4 (72.6S 44.9E, 340 m) at a radial distance <500 m outside the crater rim; the mean density is 52 rocks/10,000 m2. The spatial distribution of boulders around Crater 4 is similar to that at Crater 1, but no tracks are associated with boulders at Crater 4. The mean density of boulders around Crater 4 is 30% less than that at Crater 1, which suggests that Crater 4 is 30-50 Ma older than Crater 1 [Basilevsky et al., 2013]. The lack of boulder tracks in the vicinity of Crater 4 implies that a layer of regolith 0.3-0.5 m thick has been reworked during this time interval. A slope of -4.37 characterizes the SFD of boulders around Crater 1, whereas the SFD of boulders around Crater 4 has a slope of -5.54. These differences in slope indicate the preferential destruction of the larger rock fragments and suggest that up to 90% of boulders in the diameter range 8-12 m are fragmented into smaller pieces during the 30-50 Ma time span.

  7. 174 Reduction in Allergic Rhinitis Index by Decreasing Aero-Allergens and Malodor Causing Volatile Organic Compounds by Luna Air Purifiers Using Photo-Catalytic Oxidation (PCO) Technology

    PubMed Central

    Ghosh, Nabarun; Aguaiza, Cristina; Guzman, Alicia; Chudasama, Jay; Bennert, Jeff; Das, A. B.

    2012-01-01

    Background The quality of the environment within buildings is a topic of major importance for public health. Breathing pure and clean air allows us to think more clearly, sleep more soundly, and stay healthier. Studies show that we receive 56% of our energy from the air we breathe, more than from water and food combined. On average we breathe 37 pounds of air a day. It has been established that the use of negative ions in a purification system is an effective means of eradicating aeroallergens in room air. Methods The wall-mount, Inducts and Mobile Sanifier air purification units of Luna are designed to sanitize air, to kill surface mold, bacteria, and viruses in areas up to 26,000 cubic feet. Samples were collected from the clinic rooms to analyze the VOC concentrations using the Luna air purifiers to detect the efficiency in reducing the VOCs in the indoor air. We analyzed the aroallergens and VOCs prevalent in the indoor air in the clinics at the Coulter Animal Hospital, Amarillo, Texas. The data were correlated to the inhalant allergy index before and after running air purifiers that use PCO technology. Results Samples from the clinic rooms to analyze the VOC concentrations using the Luna air purifiers to detect the efficiency in reducing the VOCs in the indoor air. The SKC Pocket Pump and thermal desorption tubes were used to obtain the samples from the indoor air. Pumps were set on 200 mL/min as air flow to estimate the concentration of Acetic acid, Isobutyric acid, Butyric acid, Isovaleric acid, Valeric acid, Hexanoic acid, Phenol, p-cresol, 4-ethyl, 2-amino, Indole, and Skatole. All desorption tube samples were analyzed using a Markes UNITY and Markes Ultra automated thermal desorber (ATD) and a Varian 3800/Saturn 2000 GC with a MS. Slides with double sticky tape were exposed to room air stained with 2% safranin and were observed using a BX-40 Olympus microscope with DP-70 and Image Pro Plus software. Conclusions The data were correlated with the

  8. A multidisciplinary approach to reveal floodplain palaeohydrography in the surrounding of ancient Luna archaeological site (lower Magra River valley, NW Italy)

    NASA Astrophysics Data System (ADS)

    Bini, Monica; Bisson, Marina; Chelli, Alessandro; Pappalardo, Marta

    2010-05-01

    The Magra floodplain (NW Italy) is a coastal plain that was created during the last 2.5 millennia by the River Magra itself and by minor streams draining the southern slope of the Apuan Alps. The coastline progressively migrated from the mountain foothills to its present position, 2.5 km seaward. Available stratigraphical data suggest that the marine gulf that occupied the area before Bronze age gradually changed into a lagoon; this was finally separated from the open sea and became a complex of marshes that were finally silted up. All these environments provided opportunities for settlement and land use: early settlement is accounted for in the Iron Age by Ligurian people that were finally defeated by the Romans. In the 2nd century bC the roman colony of Luna (today Luni) was founded in the area. After the Imperial Age Luni gradually decayed and was finally abandoned in 1204. Post-Roman alluviation is thought to be partly responsible for the city decline and the survival of only scattered farmsteads in its surroundings. Settlement and land use history from Iron Age onward are thus tightly dependant from drainage network evolution in the area. Although historical maps provide some chronological constraints about the advance of the Magra floodplain it is still unknown how and when precisely the transformation of a lagoon environment into a dry land occurred. In particular no data are available about the position of the mouths of the Magra River and of the minor streams at Roman Times and little is known about channel migration since the Early Middle Ages and information about land reclamation are difficult to find because dispersed. In order to identify abandoned fluvial channels, a series of digital elaborations were applied to different types of Remotely-Sensed Images. In detail, the used data consist of satellite images (Landsat 7 - ETM) and airborne orthophotos (AIMA) covering a temporal interval of five years (from 1998 to 2002) and characterized by a spatial

  9. The Moon Phases in a Paper Box. (Spanish Title: Las Fases de la Luna en Una Caja de Cartón.) As Fases da Lua Numa Caixa de Papelão

    NASA Astrophysics Data System (ADS)

    de Fátima O. Saraiva, Maria; Amador, Cláudio B.; Kemper, Érico; Goulart, Paulo; Muller, Angela

    2007-12-01

    We present a very simple concrete model to demonstrate the concept of phases of an illuminated body. The main objective of our model is to help the understanding of the Moon phases as viewed from the perspective of an observer on Earth. The material allows the visualization of two important effects: (1st) even though all the time half Moon is illuminated by the Sun, we see different fractions of the illuminated Moon surface, depending on our angle of sight; (2nd) the orientation of the convex part of the Moon in the crescent and waning phases on the sky also depends on our perspective from Earth. The use of a closed box allows one to see the contrast among the different phases with no need of a dark room. We also present a text on the Moon phases, emphasizing the dependence of the aspect of the bright part on the angle of sight. En este trabajo proponemos la construcción de material didáctico de bajo costo para demostración del concepto de fases de un cuerpo iluminado. El principal objetivo de nuestro material es facilitar la comprensión de las fases de la Luna desde la perspectiva de un observador en la Tierra. El material ayuda la visualización de dos efectos importantes: (1º) a pesar de tener siempre la mitad de la Luna (representada por una bolita de espuma plástica o de ping-pong), iluminada por el Sol ( representado por una fuente de luz natural o artificial), vemos diferentes fracciones de su superficie iluminada, dependiendo del ángulo por el cual la vemos; (2º) la orientación del borde convexo de la Luna en las fases Creciente y Menguante también depende de la perspectiva por la cual la miramos desde la Tierra. El uso de una caja cerrada permite observar el contraste entre las diferentes fases sin necesidad de estar en un recinto oscuro. Presentamos también un texto explicativo sobre las fases de la Luna, enfatizando la dependencia de la apariencia de la parte iluminada con el ángulo de visión. Neste trabalho propomos a construção de

  10. University Students' Conceptions about the Moon Phases. (Spanish Title: Concepciones de Estudiantes Universitários sobre Las Fases de la Luna.) Concepções de Estudantes Universitários sobre as Fases da Lua

    NASA Astrophysics Data System (ADS)

    de Fátima Oliveira Saraiva, Maria; da Silveira, Fernando Lang; Steffani, Maria Helena

    2011-07-01

    In this article we describe the development of a multiple choice test about lunar phases and analyze the results of its application to ten groups of Physics students at the UFRGS. During the improvement of the test, we noticed that the percentage of right answers about some concepts increased significantly when associated with the reformulation of the question, emphasizing the importance of being careful to avoid incorrect answers generated by unclear questions, and not by ignorance on the matter. We confirm the results of other studies that show that students have great difficulty to relate the Moon's phase with its position in the sky at given time. On the other hand, our results suggest that, in general, students of Physics understand the phenomenon of lunar phases better than the average of university students. En estese artículo se describe la elaboración de una prueba de opción múltiple sobre las fases de la Luna y se analizan los resultados de su aplicación en diez grupos de estudiantes de Física de UFRGS. Durante el mejoramiento de la prueba observamos que el porcentaje de aciertos creció considerablemente cuando considerada una nueva redacción de la pregunta, destacando el cuidado que se debe tomar a fin de evitar respuestas incorrectas generadas por preguntas poco claras y no a causa de la ignorancia de los estudiantes sobre el tema. Confirmamos los resultados de otros estudios que las mayores dificultades de los alumnos sobre el tema fases de la Luna están en relacionar la fase de la Luna con su posición en el cielo en determinado momento. Por otra parte, nuestros resultados sugieren que, en general, los estudiantes de la Física comprenden mejor el fenómeno de las fases lunares que el promedio de los estudiantes universitarios. Neste artigo descrevemos a elaboração de um teste de múltipla escolha sobre as fases da Lua e analisamos os resultados de sua aplicação em dez grupos de estudantes de Física da UFRGS. Durante o aprimoramento do

  11. Understanding tectonic processes from the distribution pattern and interaction of strike-slip faults and en echelon: A new study from the Solis Planum and Lunae Planum regions of the Valles Marineris on Mars

    NASA Astrophysics Data System (ADS)

    Brown, K. N.; Gani, N. D.

    2016-12-01

    The issue of strike-slip faults on Mars is oft debated and not yet fully explored. While general consensus has begun to turn towards affirmation of their existence, the strike-slip faults have not been extensively studied in relation to en echelon. This study aims to investigate tectonic processes by mapping and analyzing the relationship and spatial distribution of en echelon and strike-slip faults emerging from the southern region Solis Planum and northern region Lunae Planum of the Valles Marineris. MOLA DEM data were used to map the spatial distribution of en echelon and strike-slip fault in both of these regions, for the first time. We used GIS-based histogram equalization, hill shade, slope and overlay functions to process the DEM and to maximize identification and mapping of en echelon and strike-slip faults. This fault map was then used to measure fault lateral extent, lateral offset, orientation, and spacing. We generated 3-d models, scatter and line plots, bar and rose diagrams to investigate the existence and distribution, and to synthesize and quantify the orientation and size of these faults to understand strike-slip fault kinematics on Martian surface. Results of this study show a majority of these faults are east-west trending strike-slip faults following the general east-west strike of the Valles Marineris. The length of these east-west trending faults varies between 18 to 285 km. The presence of a large number of en echelon offset by these east-west trending strike-slip faults form overlapping zones with average 30 km long faults. Fault lateral offset values range from tens to hundreds of km dominating dextral slips. Some faults also posses sinistral slips. Most of these faults might form from the interaction and linkages of the overlaps and relay zones. Thus, the presence of these large number of strike-slip faults and en echelon provide indication of past strike-slip tectonics within Solis Planum and Lunae Planum regions of the Valles Marineris.

  12. Is the Dark Side of the Moon Ever Illuminated by the Sun? (Breton Title: O Lado Escuro da Lua Nunca Apanha Sol?) El Lado Oscuro de la Luna Nunca Toma Sol?

    NASA Astrophysics Data System (ADS)

    Giovannini, Odilon; Pellenz, Daiana; Catelli, Francisco

    2014-07-01

    This work presents the elaboration of an answer to the question "Is the dark side of the moon ever illuminated by the sun?", in which issues related to the students' conceptions, how they arise, and the core elements that constitute a "good answer" are considered. These issues are initially elaborated from a literature review of the research in the field; then, and also based on this review, a didactic model that involves the relative motions of the Earth - Moon - Sun system is proposed. A description of the application of this model in a learning environment within middle school students is described. This work confirms the students' initial concepts described in the literature; on the other hand, the questions asked by students during the activity provide evidence that meaningful learning, at least to some degree, has occurred. Este trabalho apresenta a elaboração de uma resposta à pergunta "O lado escuro da Lua nunca apanha sol?" na qual são consideradas questões relacionadas às concepções iniciais dos alunos, de onde elas surgem e os elementos centrais que constituem uma "boa resposta". Essas questões são tratadas, inicialmente, a partir de uma revisão da literatura sobre pesquisas na área e, em seguida, também com base nessa revisão, um objeto modelo didático que envolve os movimentos relativos do sistema Terra - Lua - Sol é proposto. Uma descrição detalhada da aplicação deste modelo em um ambiente de aprendizagem com alunos do ensino fundamental é relatada. As concepções iniciais apresentadas na literatura se confirmam e os questionamentos feitos pelos estudantes por ocasião da aplicação do modelo fornecem indícios de que uma aprendizagem significativa, pelo menos em algum grau, ocorreu. El artículo se presenta el desarrollo de una respuesta a la pregunta "¿El lado oscuro de la luna nunca toma sol?", en la que se consideran algunas cuestiones vinculadas que se refieren a las concepciones iniciales de los estudiantes, dónde surgen

  13. A Proposed Activity for a Meaningful Learning about the Moon Phases. (Breton Title: Uma Proposta de Atividade Para a Aprendizagem Significativa sobre as Fases da Lua.) Una Actividad Propuesta Para EL Aprendizaje Significativo Acerca de Las Fases de la Luna

    NASA Astrophysics Data System (ADS)

    Martins, Bruno Andrade; Langhi, Rodolfo

    2012-12-01

    ínua avaliação durante o processo, culmina com a elaboração de uma história em quadrinhos envolvendo as fases da Lua. Portanto, o objetivo deste trabalho é apresentar uma proposta de atividade didática diferenciada sustentada pelos princípios teóricos da aprendizagem significativa aplicada ao ensino das fases da Lua durante as aulas de Física no ensino médio. En este trabajo se presenta uno de los contenidos de la Astronomía y el evidente fracaso en la enseñanza del tema en la escuela secundaria, a pesar del hecho que los documentos oficiales apuntan para la necesidad de trabajar contenidos de Astronomía en este nivel. Entre los conceptos alternativos en Astronomía que los alumnos secundarios llevan consigo, aún después de terminados los estudios, destacamos aquí el fenómeno de las fases de la Luna. El desarrollo de diferentes estrategias en relación con los métodos tradicionales, dirigidas al proceso de enseñanza-aprendizaje en este tema fue considerado en este trabajo como uno de los resultados obtenidos a la luz de los referenciales del aprendizaje significativo, tal como fueron fundamentados por Ausubel. Según la propuesta que aquí se presenta, la participación activa de los estudiantes en la ejecución de una actividad experimental y otras actividades educativas destinadas a la evaluación continua durante el proceso culminó en la elaboración de una historieta respecto de las fases de la Luna. Por lo tanto, el objetivo de este trabajo es presentar una propuesta de actividad de enseñanza diferenciada con el apoyo de los principios teóricos del aprendizaje significativo aplicado a la enseñanza de las fases de la luna durante las clases de física del ciclo secundario.

  14. For the relief of Vicente Beltran Luna.

    THOMAS, 111th Congress

    Rep. Gonzalez, Charles A. [D-TX-20

    2009-03-05

    04/20/2009 Referred to the Subcommittee on Immigration, Citizenship, Refugees, Border Security, and International Law. (All Actions) Tracker: This bill has the status IntroducedHere are the steps for Status of Legislation:

  15. For the relief of Vicente Beltran Luna.

    THOMAS, 111th Congress

    Rep. Gonzalez, Charles A. [D-TX-20

    2009-03-05

    House - 04/20/2009 Referred to the Subcommittee on Immigration, Citizenship, Refugees, Border Security, and International Law. (All Actions) Tracker: This bill has the status IntroducedHere are the steps for Status of Legislation:

  16. Osservazioni dell'eclissi penombrale di Luna

    NASA Astrophysics Data System (ADS)

    Sigismondi, Costantino

    2016-05-01

    The penumbral lunar eclipses equilibrate the probability of occurrence of solar and lunar eclipses over several years, but they are often neglected in the media and in the observations because of the difficulty of their identification due to the high luminosity of the full Moon. Three methods are presented to reduce this luminosity and to detect the penumbral phase of the lunar eclipse: the reflection on glass and water, the double polarizer and the short exposure photographs with 400 and 800 ISO and 1/500s of pose.

  17. For the relief of Vicente Beltran Luna.

    THOMAS, 111th Congress

    Rep. Gonzalez, Charles A. [D-TX-20

    2009-03-05

    04/20/2009 Referred to the Subcommittee on Immigration, Citizenship, Refugees, Border Security, and International Law. (All Actions) Tracker: This bill has the status IntroducedHere are the steps for Status of Legislation:

  18. Several Ways to Leave for Luna

    NASA Technical Reports Server (NTRS)

    Sweetser, Theodore H.

    1995-01-01

    This paper is a comprehensive survey of ballistic trajectory designs leading to the delivery of small spacecraft to the surface of the Moon. All of the currently known types of ballistic transfer trajectories are examined (including some new ones):.

  19. Proving the Orbits of the Galilean Moons Through Astrophotography. (Spanish Title: Comprobando Las Órbitas de Las Lunas Galileanas a Través de la Astrofotografía.) Evidenciando as Órbitas das Luas Galileanas Atravéd da Astrofotografia

    NASA Astrophysics Data System (ADS)

    Iachel, Gustavo

    2009-12-01

    An activity related to the observation of the Galilean moons and to amateur astrophotography is presented in this work. Through the reading of excerpts of the book Sidereus Nuncius (Sidereal Messenger), by Galileo, it is possible to trace a methodology to observe the planet and its natural satellites and, with the aid of the astrophotography, to analyze the field recordings. Moreover, it is possible to compare the images obtained after plotting the relative positions of these moons to prove their orbits. This activity can be conducted by teachers, students and amateur astronomers, in order to develop their capabilities of observation of astronomical phenomena. Se presenta en este trabajo una actividad relacionada a la observación de las lunas Galileanas y a la astrofotografía amateur. A través de la lectura de tramos de la obra Sidereus Nuncius (El Mensajero Sideral) de Galileo, es posible trazar una metodología para la observación del planeta y de sus satélites naturales y, con el auxilio de la astrofotografía, analizar las anotaciones de campo. Además, es posible comparar las imágenes obtenidas con el gráfico de las posiciones relativas de estas lunas para comprobar sus órbitas. Esa actividad puede ser realizada por maestros, estudiantes y astrónomos amateurs, de forma a desarrollar sus capacidades de observación de los fenómenos astronómicos. Uma atividade relacionada à observação das luas Galileanas e à astrofotografia amadora é apresentada neste trabalho. Através da leitura de trechos da obra Sidereus Nuncius (Mensageiro Sideral), de Galileu, é possível traçar uma metodologia para a observação do planeta e de seus satélites naturais e, com o auxílio da astrofotografia, analisar as anotações de campo. Além disso, é possível comparar as imagens obtidas com o gráfico das posições relativas destas luas para evidenciar suas órbitas. Essa atividade pode ser realizada por professores, estudantes e astrônomos amadores, de forma a

  20. 78 FR 49121 - Safety Zone; Luna Pier Fireworks, Luna Pier, MI

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-08-13

    ..., 2013. Enforcement of this zone is necessary to ensure the safety of life on the navigable waters of the United States immediately prior to, during, and immediately after the associated marine event. During the... immediately after the fireworks event. DATES: The regulation in 33 CFR 165.941(a)(16) will be enforced from 9...

  1. Mexico's giant fields, 1978-1988 decade

    SciTech Connect

    Acevedo, J.S.; Pemex, A.B.S.

    1990-09-01

    Twenty giant oil and gas fields were discovered in Mexico during the period of 1978-1988. The fields, located in adjacent areas, are described in terms of stratigraphy, tectonics, and general characteristics of the reservoirs. Production and reserves figures are also included. The two main oil productive areas in Mexico, Chiapas-Tabasco and offshore Campeche Sound, contribute 92% of Mexico's Mesozoic production. Production comes from Upper Jurassic carbonates; Cretaceous calcareous breccias, limestones, and dolomites; and from lower Paleocene calcareous breccias. The fields represented include 11 from the Chiapas-Tabasco area (Agave, Paredon, Iris, Giraldas, Cardenas, Jujo, Bellota, Tecominoacan, Muspac, Sen, and Luna) and nine from the the Campeche Sound area (Abkatun, Ku, Chuc, Ek, Pol, Malob, Caan, Uech, and Batab).

  2. Astronomy at School: Measurements of the Earth-Moon Distance. (Spanish Title: Astronomía en la Escuela: Medición de la Distancia Tierra-Luna.) Astronomia na Escola: Medida da Distância Terra-Lua

    NASA Astrophysics Data System (ADS)

    Paolantonio, Santiago; Pintado, Olga I.

    2006-12-01

    The aim of this project is to approach High School students to Science. We propose to measure the Earth-Moon distance using the parallax. The observation and measurements techniques and all the calculations needed are described in this paper. The results obtained in a test experience realized during 2003 are presented. This test shows that this is a feasible project and also shows which things needed to be improved. Se plantea la propuesta de un proyecto educativo dirigido al Nivel Medio de enseñanza, consistente en la determinación de la distancia Tierra - Luna por paralaje. Se describen las técnicas de observación, mediciones y cálculos. Se proporcionan a continuación los resultados obtenidos en la experiencia piloto realizada en el 2003, la que permitió comprobar la factibilidad de llevar a cabo la propuesta, así como perfeccionar los diferentes aspectos involucrados en la misma. Propomos neste trabalho um projeto educativo dirigido ao Ensino Médio que consiste na determinação da distância Terra-Lua pelo efeito da paralaxe. As técnicas de observação, medidas e cálculos auxiliares são descritos, e os resultados obtidos numa experiência-teste realizada no ano de 2003 apresentados. Este último teste permitiu comprovar a viabilidade de execução da proposta e aperfeiçoar diversos aspectos da mesma.

  3. Providing Meaningful Learning for Students of the Sixth Grade of Middle School: a Study on the Moon Phases. (Breton Title: Propiciando Aprendizagem Significativa Para Alunos do Sexto Ano do Ensino Fundamental: um Estudo sobre as Fases da Lua.) Propiciando el Aprendizaje Significativo Para Alumnos del Sexto Nivel de la Educación General Básica: un Estudio sobre Las Fases de la Luna

    NASA Astrophysics Data System (ADS)

    Darroz, Luiz Marcelo; Samudio Pérez, Carlos Ariel; da Rosa, Cleci Werner; Heineck, Renato

    2012-07-01

    We relate in this article a didactic experience studying the moon phases with a group of middle school students of a private school of the municipality of Passo Fundo, RS. Based on David Ausubel's Meaningful Learning Theory, we have sought to develop a proposal following a didactic model which simulates the phases of the Moon, as based on the previous conceptions of the students. The signs of learning were evidenced by means of memory registries of the activity. From the obtained results we believe that the proposal achieved its goals, since the students were able to identify, differentiate and transfer the phenomenon of the moon phases to new contexts. Thus, it is concluded that a methodology focused on a meaningful content for the students is fundamental to the construction and genuine grasping of what is being learned. Neste artigo, relata-se uma experiência didática de estudo das fases da Lua com uma turma do 6° ano do Ensino Fundamental, de uma escola privada do município de Passo Fundo, RS. Tendo como fundamentação teórica a Teoria da Aprendizagem Significativa de David Ausubel, buscou-se desenvolver a proposta a partir de um modelo didático que simula as fases da Lua e com base nas concepções prévias dos estudantes. Os indícios da aprendizagem foram constatados através de registros de memórias da atividade. Pelos resultados apresentados, acredita-se que a proposta alcançou seus objetivos, uma vez que os estudantes conseguiram identificar, diferenciar e transferir o fenômeno das fases da Lua para novos contextos. Assim, conclui-se que uma metodologia com enfoque em um conteúdo significativo ao estudante é fundamental para a construção e compreensão genuína do que está sendo aprendido. En este artículo se relata una experiencia didáctica de estudio de las fases de la Luna con una clase de 6º año de la educación general básica de una escuela privada del municipio de Passo Fundo, RS. Teniendo como fundamentación teórica la Teor

  4. High School Student's Alternative Conceptions About the Phenomenon of the Formation of the Moon Phases. (Spanish Title: Concepciones Alternativas de Alumnos de Educación Media Sobre el Fenómeno de Formación de las Fases de La Luna.) Concepções Alternativas de Alunos do Ensino Médio Sobre o Fenômeno de Formação das Fases da Lua

    NASA Astrophysics Data System (ADS)

    Iachel, Gustavo; Langhi, Rodolfo; Fernandes Scalvi, Rosa Maria

    2008-07-01

    Forty students, at ages between 14 and 18 years old, from three schools in Bauru city, were questioned about their alternative conceptions concerning the phenomenon of formation of the Moon Phases. It was observed that some of the pupils confound the phenomenon of the formation of the Moon Phases with the phenomenon of the formation of the lunar eclipses, others are unaware of the reason of the phenomenon, they present incoherent alternative conceptions of the reality or incomplete conceptions. The results found here are aimed at the teachers of Elementary Education and can be used as a subsidy for future development of new pedagogical methods. Cuarenta estudiantes, con edad entre 14 y 18 años, pertenecientes a tres escuelas de la ciudad de Bauru, fueron cuestionados sobre sus concepciones alternativas acerca del fenómeno de la formación de las fases de la Luna. Fue observado que algunos alumnos confunden el fenómeno de formación de las fases de la Luna con el fenómeno de formación de los eclipses lunares, otros desconocen el motivo delfenómeno, presentan concepciones alternativas incoherentes con la realidad o bien presentan concepciones incompletas. Los resultados aquí encontrados son destinados a los profesores de la Enseñanza Básica y podrán ser usados como ayuda para el futuro desarrollo de nuevos métodos pedagógicos. Quarenta estudantes, com idades entre 14 e 18 anos, pertencentes a três escolas da cidade de Bauru, foram questionados sobre suas concepções alternativas acerca do fenômeno de formação das fases da Lua. Foi observado que alguns dos alunos confundem o fenômeno da formação das fases da Lua com o fenômeno da formação dos eclipses lunares, outros desconhecem o motivo do fenômeno, apresentam concepções alternativas incoerentes com a realidade ou então concepções incompletas. Os resultados aqui encontrados são destinados aos professores do Ensino Básico e poderão ser usados como subsídio parafuturo desenvolvimento de

  5. Algoritmi per il calcolo dell'epatta della Luna

    NASA Astrophysics Data System (ADS)

    Sigismondi, Costantino

    2016-05-01

    On the sides of the chair of St. Hyppolitus in the Vatican Libray there is a series of 112 epacts, used for calculating the date of Christian Easter valid for 112 years from 222 AD. The algorithm of octaëteris or 8 civil (julian) years=99 lunar months and a correction of three days each 16 years or one day each 5, 5, 6 years are discussed. Four complete solar cycles (28 years), after which the sequence of the day of the week are repeating, are included in 112 years as well as 7 groups of 16 years; 112 is the minimum common multiple between the double octaëteris (16 years) and the solar cycle (28).

  6. Ex Luna Scientia: The Lunar Occultation Explorer (LOX)

    NASA Astrophysics Data System (ADS)

    Miller, Richard

    2017-01-01

    The Lunar Occultation Explorer (LOX) is a next-generation mission concept that provides new capabilities for time-domain astrophysics and established the Moon as a platform for nuclear astrophysics. Performance requirements are driven by Type-Ia supernova (SNeIa) science goals that seek to revel details of these profoundly radioactive objects, including their diversity. Primary science objectives include, but are not limited to, probing the fundamental thermonuclear physics processes, performing a census of progenitors and their explosion mechanisms, and evaluating the environmental conditions and intrinsic systematics of these enigmatic objects. LOX provides new capabilities for all-sky, continuous monitoring in the MeV regime (0.1-10 MeV) by leveraging the Lunar Occultation Technique (LOT). Key benefits of the LOX/LOT approach include maximizing the ratio of sensitive-to-total deployed mass, low implementation risk, and demonstrated operational simplicity that leverages extensive experience with planetary orbital geochemistry investigations; LOX also enables long-term monitoring of MeV gamma-ray sources, a critical capability for SNeIa science. Proof-of-principle efforts validated all aspects of the mission using previously deployed lunar science assets, and led to the first high-energy gamma-ray source detected at the Moon. LOX mission performance, development progress, and expectations for science investigations will be presented.

  7. Luna: What Did We Learn and What Should We Expect?

    NASA Technical Reports Server (NTRS)

    Wallace, William T.

    2009-01-01

    This presentation presents a look at the space program's background prior to lunar exploration and highlights the Apollo program and lessons learned from lunar exploration. The possibilities of exposures and difficulties attributed to lunar dust are described, including obscured vision, clogged equipment, coated surfaces, and inhalation, among others. A lunar dust simulant is proposed to support preliminary studies. Lunar dust is constantly activated by meteorite lunar dust, UV radiation and elements of solar wind - this active dust could produce reactive species. Methods of deactivation must be determined before new lunar missions, but first we must understand how to reactivate dust on Earth. Activation methods tested and described here include crushing/grinding or UV activation. Grinding time has a direct effect on amount of hydroxyl radicals produced upon addition of ground quartz to a solution. An increase in hydroxyl production was also seen for a lunar simulant with increased grinding.

  8. Cathodoluminescence of regolith returned by Luna 16 automatic station

    NASA Technical Reports Server (NTRS)

    Spivak, G. V.; Antoshin, M. K.; Ilin, N. P.; Saparin, G. V.

    1974-01-01

    Observations of local variations in the intensity and spectral composition of the cathodoluminescence of lunar regolith are described. These variations are caused by structural features, by the kind and quantity of the material, and by the admixtures. In addition, cathodoluminescent emission is also associated with a change in the temperature of the lunar surface. Periodic diurnal illumination and darkening of the moon is responsible for a temperature gradient normal to the lines of longitude. These observations made of regolith, using a scanning electron microscope with an attachment for temperature variation, simulate the indicated thermal changes of the cathodoluminescent properties of lunar material.

  9. Metal and phosphide phases in Luna 24 soil fragments

    NASA Astrophysics Data System (ADS)

    Axon, H. J.; Nasir, M. J.; Knowles, F.

    1980-06-01

    Soil fragments in the 106-150 and 150-250 micron size ranges were selected for metallographic and microprobe examination on the basis of their magnetic properties. Serial sections of the mounted fragments were examined. One fragment proved to be a compositionally zoned crystal of phosphide with no metal phase but partly embedded in glass. Another was a coarse-grained association of silica with ilmenite and fayalite with a 5-micron particle of metallic iron in troilite. One splinter of oxide contained a central spine of metallic iron. The remaining six fragments contained 10-micron particles of iron-nickel-cobalt alloy with compositions in either the 'meteoritic' or the low Ni-low Co sub-meteoritic composition ranges of Ni, Co content. In some fragments separate particles of alloy had different Ni, Co contents. No particles of high Co metal were encountered.

  10. Lunar Phases and Earthly Events: Beliefs from Different Education Levels. (Spanish Title: Fases de la Luna y Acontecimientos Terrestres: Creencia de Distintos Niveles de Instrucción.) As Fases da Lua e os Acontecimentos Terrestres: a Crença de Diferentes Níveis de Instrução

    NASA Astrophysics Data System (ADS)

    Darroz, Luiz Marcelo; da Rosa, Cleci Teresinha Werner; Alves Vizzotto, Patrick; Becker da Rosa, Álvaro

    2013-12-01

    This article presents the result of a research carried out in the first semester of 2013 with a group of 80 subjects from different education levels. In this research, we sought to investigate the earthly events that this group of people attributes to the phenomenon of lunar phases. For data collection we used semi-structured interviews guided by questions that aimed to keep the focus on subjects of the investigation. Interviews were recorded and transcribed, and the results were compared to scientific studies in the area after being quantitatively and qualitatively analyzed. Research data showed that the Moon and the phenomenon of lunar phases still fascinate and raise the interest of people. However, the lack of knowledge to find correct explanations to the phenomena involving the moon ends up originating a series of beliefs about its influence on earthly events. En este artículo se presenta el resultado de una investigación realizada en el primer semestre de 2013 con a un grupo de 80 individuos de distintos niveles de instrucción. En esta investigación, tratamos de averiguar cuáles son los acontecimientos terrestres que este grupo de personas atribuye al fenómeno las fases lunares. Como instrumento de colecta de datos, se emplearon entrevistas semiestructuradas guiadas por preguntas que trataban de mantener la atención de los entrevistados en el objeto investigado. Las entrevistas fueron grabadas y transcriptas, y los resultados, después de ser analizados cuantitatativa y cualitativamente, fueron confrontados con estudios científicos del área. Los datos de la investigación demuestran que la Luna y de sus fases continúan fascinando y despertando el interés de la población. Sin embargo, la falta de conocimientos para encontrar explicaciones correctas relacionadas a los fenómenos que ocurren con el astro acaba originando una serie de creencias en la población sobre su influencia en los sucesos terrestres. Apresenta-se neste artigo o resultado de uma

  11. Astronomy Teaching and Teachers Continuing Education: the Interdisciplinarity during a Total Lunar Eclipse. (Spanish Title: Enseñanza de la Astronomía y la Formación Continua de Profesores: la Interdisciplinariedad Durante un Eclipse Total de Luna.) Educação EM Astronomia E Formação Continuada de Professores: a Interdisciplinaridade Durante um Eclipse Lunar TOTAL

    NASA Astrophysics Data System (ADS)

    Langhi, Rodolfo

    2009-07-01

    This paper describes how 67 teachers from 23 cities, could awaken, in students, the scientific interest, using a natural astronomical phenomenon: a total lunar eclipse. Before and after of eclipse, meetings for continuing education were characterized by interdisciplinarity of astronomy and the importance of these observations. Working groups were formed by teachers and students, who organized the survey data, mobilizing the people in their cities. The results point ways about how to provide the scientific culture and the motivation to learn science in students, using approaches between the following communities: scientific, amateur and school. En este artículo se describe cómo 67 profesores de 23 ciudades, despertó el interés científico en los estudiantes mediante un fenómeno astronómico: un eclipse total de Luna. Antes y después del eclipse, reuniones para la formación continua se centraron en la interdisciplinariedad de la astronomía, y la importancia de las observaciones de este tipo de fenómeno. Profesores y estudiantes formaron grupos de trabajo para investigar datos durante el eclipse, con el participación de la comunidad en sus ciudades. Los resultados apuntan a las opciones que conducen a la cultura científica y la motivación para aprender la ciencia, utilizando las relaciones de los siguientes grupos: científicos, aficionados y la escuela. Este texto relata como 67 professores, provenientes de 23 cidades, puderam despertar, nos alunos, o interesse científico utilizando um fenômeno natural astronômico: um eclipse lunar total. O evento foi precedido e procedido por encontros de formação continuada, onde se caracterizou a interdisciplinaridade da astronomia e a importância das observações de fenômenos como estes. Grupos de trabalho foram formados por professores e alunos, que se organizaram para o levantamento conjunto de dados durante o fenômeno, além do envolvimento da comunidade em suas respectivas cidades. Os resultados apontam

  12. Tabasconura tapijulapana gen. nov. sp. nov. (Collembola: Neanuridae) from Tabasco, México.

    PubMed

    Palacios-Vargas, José G; Catalán, Elihú

    2015-04-14

    Tabasconura gen. nov. (Neanuridae) and type species T. tapijulapana sp. nov., are described and illustrated. The new genus possesses all characters of the tribe Sensillanurini Cassagnau, and is characterised by the presence of slightly elongated tubercles on the body and also elongation and thickening of the sensillum S2 as well as S7 on antennal segment IV. Development of S7 is a character of the tribe.

  13. [Ichthyofauna from wetlands of San Pedro, Balancán, Tabasco, México].

    PubMed

    Castillo-Domínguez, Alfonso; Barba Macías, Everardo; Navarrete, Alberto de Jesús; Rodiles-Hernández, Rocío; Jiménez Badillo, María de Lourdes

    2011-06-01

    San Pedro River's wetlands sustain trophic nets in the fluvial system, due to the high habitat availability, and space and temporal variations. In order to describe the relationship between environmental parameters and ichthyofauna, this study evaluated fish assemblages composition, distribution, abundance, density, biomass, richness species, diversity and equitability in the wetlands. Sampling considered three different sites and climatic seasons (dry, rainy and cold fronts). The physical and chemical parameters considered were dissolved oxygen, temperature, pH, water transparency and the depth. Fishes were caught with a shrimp net, after six minutes towings and were identified afterwards. A total of 1 049 organisms of 25 fish species were caught, two of which were exotic species: Oreochromis niloticus and Parachromis managuense. A total of 23 species were found at site I (with the highest density 0.23 ind./m2), 17 at site II (0.23 ind./m2) and 14 at site III (0.12 ind./m2). The dry season had the highest species number with 21 species, followed by the rainy season with 17 species, and the cold season with five species. Similarly, the highest biomass (8.30 g/m2) was found in dry season, followed by the rainy (2.16 g/m2) and the cold seasons (0.03 g/m2). Considering seasons, highest density was found during the dry (0.436 ind./m2), followed by the rainy (0.213 ind./m2) and the cold (0.023 ind./m2) seasons. The dominant density species during the study period, according to the quadrants graphic of Olmstead-Tukey were: Petenia splendida, Vieja heterospila, Vieja synspila, Dorosoma petenense and Astyanax aeneus. There were significant differences in the species richness among sites. Temperature, depth and transparency showed differences among the seasons. The canonical correspondence analysis indicated that fish distribution was governed by environmental parameters during all seasons. In terms of fish abundance and composition, environmental parameters play an important role showing spatial and temporal differences in the ecosystem, this could be explained with the fact that most of young fishes have a movement behavior to the wetlands, searching refuge and feed during the dry season. Considering the diversity indexes variation, it may be concluded that San Pedro River's wetlands correspond to a system where the ichthyofauna composition fluctuates spatial and seasonally.

  14. Scholarship in Student Affairs: Thinking Outside the Triangle, or Tabasco on Cantaloupe.

    ERIC Educational Resources Information Center

    Sanlo, Ronni

    2002-01-01

    This article expresses a concern about whether student affairs professionals examine the language they use, as well as ponders how they learned what they know about marginalization of populations on campuses. Briefly explores eight areas within student affairs, specifically for sexual orientation and gender identity content. (Contains 12…

  15. A new species of Jahnulales from Las Ilusiones Lagoon, Tabasco, Mexico

    USDA-ARS?s Scientific Manuscript database

    During a study on biodiversity of freshwater ascomycetes from an urban tropical lagoon, an ascomycete with similar morphology to species of Jahnulales was obtained. Smooth surface test blocks of Pinus sp., Bucida sp., Cedrela sp. and Tabebuia sp. were submerged in pairs close to a private house whar...

  16. Scholarship in Student Affairs: Thinking Outside the Triangle, or Tabasco on Cantaloupe.

    ERIC Educational Resources Information Center

    Sanlo, Ronni

    2002-01-01

    This article expresses a concern about whether student affairs professionals examine the language they use, as well as ponders how they learned what they know about marginalization of populations on campuses. Briefly explores eight areas within student affairs, specifically for sexual orientation and gender identity content. (Contains 12…

  17. Chemical Characterization of Brines from Selected Oil Fields, Tabasco, México

    NASA Astrophysics Data System (ADS)

    Méndez-Ortiz, B.; Carrillo-Chavez, A.; Tritlla, J.; Levresse, G.; Gonzalez-Partida, E.; Oviedo-Perez, A.; Martinez-Kepm, H.; Gonzalez-Posadas, F.; Clara-Valdes, L.

    2004-12-01

    Thirteen brine samples were recovered from nine oil-producing wells in the Agave (Cretaceous) and Saramako (Cretaceous and Tertiary) oil fields. These samples were analyzed for major and trace elements as well as O and D isotopic compositions. The goal of this study was to compare the possible links between oil-related brines enclosed within Cretaceous and Tertiary productive horizons that were thought to have similar origin oils. The salinity of the Saramako Cretaceous and Tertiary horizons is very constant, around 30000 ppm, one to six times lower than the salinities found in the Agave Cretaceous Field (from 45000 to 170000 ppm). Major ion chemistry suggests that brines are in equilibrium with the host rock. One of the main difference, besides Mg, resides in the S concentrations, were Agave samples present lower concentrations, probably related to the presence of abundant sulfides in the aquifer's rock. Halogen (Br, Cl) systematics indicates a different origin for the Saramako and Agave brines. The Saramako samples halogen composition plot near normal seawater both in the Na/Cl vs Cl/Br (molar ratios) and the Cl vs Br (ppm) plots. The Agave halogen data scatter near and underneath the seawater evaporation line in the Na/Cl vs Cl/Br (molar ratios), suggesting that these fluids could represent seawater evolved past the point of halite precipitation. The Cl vs Br (ppm) plot indicates that these fluids undergone some degree of mixing with low-salinity fluids, probably seawater. The presence of two different groups of data suggests the compartment of the aquifer. The \\deltaD and \\delta18O data show strong differences between the Saramako and Agave brines. The Saramako brine \\delta18O and \\deltaD isotopic compositions are +2.1% (VSMOW) and -13.8% respectively. The Agave samples have a \\delta18O composition from +4.3% to +6.0% and \\deltaD isotopic composition from -20.0% to -12.6%. Differences in \\delta18O compositions between Saramako and Agave brines indicate that the latter fluids were in equilibrium with the host dolostones at certain temperature. Saramako brine composition indicates a near-pristine seawater origin. Agave brines chemical composition suggests an origin related with a bittern formed after evaporation of seawater past the point of halite precipitation, subsequently mixed with seawater. Oxygen isotopic compositions reflect both different host rock and water to rock interaction phenomena, whereas hydrogen isotopic composition can be modified by diagenetic reactions.

  18. Hydrogen and Carbon Stable Isotopic Compositions and Concentrations of Methane in Cave Air of Cueva de Villa Luz, Tabasco, Mexico

    NASA Astrophysics Data System (ADS)

    Webster, K. D.; Rosales Lagarde, L.; Sauer, P. E.; Schimmelmann, A.; Lennon, J. T.; Boston, P. J.

    2014-12-01

    Cueva de Villa Luz (CVL) is a unique biogeochemical environment where microbial consortia are supported by hydrogen sulfide (H2S) leading to sulfuric acid speleogenesis (SAS) which is thought to have generated the porosity and permeability of several petroleum reservoirs. Possible sources of the sulfur (S) include the Chichón Volcano and petroleum basins in the area. A better understanding of the source of the H2S in CVL may help predict where else SAS may have occurred. Analysis of methane (CH4) in CVL may provide a proxy to assess the source of S entering CVL. We obtained 13 air samples in 1-L Tedlar® bags from varying locations in CVL to assess the role of CH4 in sulfide-rich karst systems. CH4 and carbon dioxide (CO2) concentrations were measured by gas-chromatography. The stable isotopic ratios of carbon and hydrogen were measured on a stable isotope-ratio mass-spectrometer. CH4 in the air of CVL ranged from 1.88 ± 0.10 ppmv to 3.7 ± 0.2 ppmv. CO2 concentrations ranged from 400 ± 20 ppmv to 920 ± 50 ppmv. For comparison, the CH4 and CO2 concentrations in the outside atmosphere were 1.96 ± 0.10 ppmv and 430 ± 20 ppmv respectively. CH4 and CO2 were positively correlated in CVL (R2 = 0.91, CH4 = [0.0035 ± 0.0007] CO2 + [0.4 ± 0.4], p >0.01). The highest concentrations were near springs. Keeling-style analysis showed that the CH4 samples from CVL plot along a two-end member mixing model and suggest that CH4 is outgassing from spring water with isotopic compositions δ13CCH4 = -24 ± 3 ‰ and δ2HCH4 = -40 ± 40 ‰. CO2 did not plot along a two end member mixing model. The proposed δ13C of CH4 entering from springs does not closely match the δ13CCH4 values from hydrocarbon basins in the area. This is likely due to oxidative loss of CH4 as it ascends to CVL which may be partly driven by anaerobic methanotrophy coupled to sulfate reduction. Analysis of the spring water chemistry coupled to biogeochemical modeling may help quantify the amount of methanotrophy occurring in the subsurface.

  19. Impact of first-ever mild stroke on participation at 3 and 6 month post-event: the TABASCO study.

    PubMed

    Adamit, Tal; Maeir, Adina; Ben Assayag, Einor; Bornstein, Natan M; Korczyn, Amos D; Katz, Noomi

    2015-01-01

    This study focused on the relationships between cognition, participation and quality of life (QoL) among first-ever mild ischemic stroke patients 3 months post-event. We hypothesized that significant correlations exist between cognition, executive functions (EF), QoL and participation; and that EF and QoL will significantly contribute to participation beyond demographics and stroke severity at 3 and from 3 to 6 months post-stroke. A prospective cohort study, recruiting consecutive first-ever stroke patients from a large tertiary hospital. The inclusion criteria were first event, mild stroke (NIHSS ≤ 5), and no previous significant neurological or cognitive impairment. In addition to assessment every 6 month at the hospital, an assessment battery was administered at home 3 months post-stroke. Participants showed mild to moderate difficulties in cognition and participation (n = 249). Low to moderate correlations were found between cognition and EF with participation (-0.380, p < 0.05; r = 0.460, p < 0.001, respectively); and cognition with QoL (r = 0.421, p < 0.001). EF and QoL contributed significantly to participation at 3 months (R(2) = 0.961) and in addition education at 6 months (R(2) = 0.701). Participants after mild ischemic stroke experienced cognitive and EF difficulties that affect their participation and QoL. Further studies are needed of mild stroke survivors to enhance our understanding of the variables that affect participation. The findings of the current study have significant implications for the participation of people after mild stroke in the community. Health care systems in general and rehabilitation programs, in particular, do not consider that these clients need rehabilitation as most of them perform basic daily functions independently. Thus, although cognitive and EF deficits are found in people following even mild stroke, but are not externally apparent, these impairments are mostly neglected by the health care system. Mild stroke has long-term effects in most cases and effect family members as well. The implications of the study's results, as well as those of other studies, emphasize the necessity of follow-up and rehabilitation efforts at home and in the community. These efforts should focus on re-enabling the individual to participate in previous activities as much as possible and on providing support for family members. The strength of this study lies in the large number of participants who were evaluated at home in their natural environments. Studies of this kind are rarely performed in the participants' real-life settings, thus the current study provides an important perspective on the participation of this population in the community.

  20. [Somatic production of two species: Crassostrea virginica and Ischadium recurvum Bivalvia in Mecoacán, Tabasco, México].

    PubMed

    George Zamora, A; Aldana Aranda, D

    2000-12-01

    The Mexican oyster fishery, 90% supported by the coastal lagoons of the Gulf of Mexico, has decreased drastically in the last six years as a result of anthropogenic pollution and improper management. The mussel Ischadium recurvum has proliferated and competes with oysters for space and probably food. Crassostrea virginica and Ischadium recurvum were studied to evaluate somatic production with biometry and physiological condition indices (PCI's) during an annual cycle. A random sample of 200 organisms was taken montly for each species. Condition indices wet flesh weigth: wet shell weight ratio (WFW/WSW), dry flesh weight: wet flesh weight ratio (DFW/WFW), dry flesh wet: dry shell weight ratio (DFW/DSW), and ash free dry weight: tissue dry weight (AFDW/TDW) were calculated. In order to stablish physiological condition and temporal variability, these indices were compared between species and months. The somatic production of mussels was higher than in oysters. This enhancement in production could be explained by: 1) Mussel uses less energy for shell production, 2) a constant recruitment of mussel almost year-round, and 3) the mesohalin lagoon was more favourable to the mussel.

  1. Seasonal prevalence of antibodies to Leptospira interrogans in Antillean manatees from a landlocked lake in Tabasco, Mexico.

    PubMed

    Aragón-Martínez, Arianna; Olivera-Gómez, León D; Jiménez-Domínguez, Darwin

    2014-07-01

    Factors that alter the dynamics of ecologic systems can influence transmission of infectious diseases and may lead to decreases in natural populations. Leptospirosis is a cosmopolitan disease of zoonotic importance that affects most mammals. At the southern Gulf of Mexico, Antillean manatees (Trichechus manatus manatus) inhabit highly variable environments, with extended floods during the rainy season and drought conditions during the dry season that affect food availability and the thermal environment for manatees. We tested for changes in prevalence and titers of antibodies to 12 serovars of Leptospira interrogans in manatees between dry and rainy seasons. We determined titers for L. interrogans through microscopic agglutination tests (MAT) from 10 manatees, six during the dry season (DS), and six during the rainy season (RS) in Laguna de las Ilusiones, a landlocked lake hosting a population of about 20 manatees. All individuals were antibody positive (titers ≥ 100) to at least one serovar. The serovars bataviae, bratislava, canicola, and icterohaemorrhagiae had overall prevalences ≥ 50%; bataviae, bratislava, and canicola had prevalences ≥ 50% during both seasons. Serovars icterohaemorrhagiae and pyrogenes had prevalences ≥ 50% during DS and pomona, tarassovi, wolfii, and autumnalis during RS. Significant differences in prevalence between seasons were found for pomona, tarassovi, and autumnalis. Titers of tarassovi, wolfii, autumnalis, and bataviae were significantly higher during RS. There was a high prevalence of L. interrogans during the RS independent of high availability of plant foods, coinciding with the epizootiology of the bacteria that are endemic to tropical regions. Another factor possibly influencing prevalence is high anthropogenic pressure at the lake, causing an increase in potential sources of infection. Because of possible cross-reaction in MAT, further research is needed on the molecular discrimination of serovars in animals in the lake.

  2. 77 FR 4829 - Emilio Luna, M.D.; Decision and Order

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-01-31

    ... Registrant's DEA Certificate of Registration as a practitioner, on the grounds that he does not possess... his continued registration is inconsistent with the public interest. Show Cause Order at 1 (citing 21... cause why registration should not be * * * revoked or suspended.'' 21 U.S.C. 824(c). In contrast to...

  3. Discontinuities in the shallow Martian crust at Lunae, Syria, and Sinai Plana

    USGS Publications Warehouse

    Davis, P.A.; Golombek, M.P.

    1990-01-01

    Detailed photoclinometric profiles across 125 erosional features and 141 grabens in the western equatorial region of Mars indicate the presence of three discontinuities within the shallow crust, at depths of 0.3, 0.6 km, 1 km, and 2-3 km. The shallowest discontinuity corresponds to thickness estimates for the ridged plains unit in this region, and thus the discontinuity probably is the contact between a sequence of layered rock making up this unit and the underlying megaregolith. The 1-km discontinuity is reflected in the base levels of erosion of all the features studied, and it may correspond to the base of the proposed layer of ground ice. Model calculations show that graben-bounding faults consistently intersect at the mechanical discontinuity at about 1 km depth. This discontinuity may represent an interface between ice-laden and dry regolith, ice-laden and water-laden regolith, or pristine and cemented regolith. A correlation between wall valley head depth and local thickness of the faulted layer suggests that the 1-km discontinuity also controlled the depth of the heads of sapping canyons. The third discontinuity, at a depth of 2-3 km, corresponds to the proposed base of the Martian megaregolith and is probably the interface between overlying, ejected breccia and in situ, fractured basement rocks. -from Authors

  4. The tadpole of Scinax melanodactylus (Lourenço, Luna & Pombal Jr, 2014) (Amphibia, Anura, Hylidae).

    PubMed

    Abreu, Rafael Oliveira De; Napoli, Marcelo Felgueiras; Trevisan, Camila Costa; Camardelli, Milena; Dória, Thais Andrade Ferreira; Silva, Lucas Menezes

    2015-07-06

    Scinax melanodactylus is a small treefrog distributed within the Tropical Atlantic morphoclimatic domain (see Ab'Sáber 1977 for South American morphoclimatic domains), from northern Espírito Santo state to Sergipe state in Brazil (Lourenço et al. 2014). The species is usually found inhabiting herbaceous and shrubby xerophytic vegetation (e.g. terrestrial tank-bromeliads) from sandy plains of beach ridges known in Brazil as Restingas (see Rocha et al. 2007 for a Restinga definition), and also the edge of forest areas with temporary ponds and/or permanent lakes and streams near these environments (Bastazini et al. 2007, as Scinax agilis; Lourenço et al. 2014). Scinax melanodactylus is currently placed in the S. catharinae species group (Lourenço et al. 2014), which in turn is included in the S. catharinae clade (sensu Faivovich et al. 2005). The S. catharinae clade is currently comprised of 46 species, 33 placed in the catharinae group and 13 in the perpusillus group (Faivovich et al. 2010, Silva & Alves-da-Silva 2011, Lourenço et al. 2014, Frost 2015). From these, 32 species have tadpoles with external morphology and oral disc formerly described. Here, we describe the external morphology, oral disc and color patterns of the previously unknown tadpole of S. melanodactylus.

  5. Project Luna Succendo: The Lunar Evolutionary Growth-Optimized (LEGO) Reactor

    NASA Astrophysics Data System (ADS)

    Bess, John Darrell

    A final design has been established for a basic Lunar Evolutionary Growth-Optimized (LEGO) Reactor using current and near-term technologies. The LEGO Reactor is a modular, fast-fission, heatpipe-cooled, clustered-reactor system for lunar-surface power generation. The reactor is divided into subcritical units that can be safely launched within lunar shipments from the Earth, and then emplaced directly into holes drilled into the lunar regolith to form a critical reactor assembly. The regolith would not just provide radiation shielding, but serve as neutron-reflector material as well. The reactor subunits are to be manufactured using proven and tested materials for use in radiation environments, such as uranium-dioxide fuel, stainless-steel cladding and structural support, and liquid-sodium heatpipes. The LEGO Reactor system promotes reliability, safety, and ease of manufacture and testing at the cost of an increase in launch mass per overall rated power level and a reduction in neutron economy when compared to a single-reactor system. A single unshielded LEGO Reactor subunit has an estimated mass of approximately 448 kg and provides 5 kWe using a free-piston Stirling space converter. The overall envelope for a single unit with fully extended radiator panels has a height of 8.77 m and a diameter of 0.50 m. The subunits can be placed with centerline distances of approximately 0.6 m in a hexagonal-lattice pattern to provide sufficient neutronic coupling while allowing room for heat rejection and interstitial control. A lattice of six subunits could provide sufficient power generation throughout the initial stages of establishing a lunar outpost. Portions of the reactor may be neutronically decoupled to allow for reduced power production during unmanned periods of base operations. During later stages of lunar-base development, additional subunits may be emplaced and coupled into the existing LEGO Reactor network Future improvements include advances in reactor control methods, fuel form and matrix, determination of shielding requirements, as well as power conversion and heat rejection techniques to generate an even more competitive LEGO Reactor design. Further modifications in the design could provide power generative opportunities for use on other extraterrestrial surfaces such as Mars, other moons, and asteroids.

  6. Discontinuities in the shallow Martian crust at Lunae, Syria, and Sinai Plana

    SciTech Connect

    Davis, P.A. ); Golombek, M.P. )

    1990-08-30

    Detailed photoclinometric profiles across 125 erosional features and 141 grabens in the western equatorial region of Mars indicate the presence of three discontinuities within the shallow crust. Pits, troughs, and wall valleys (tributary canyons) within Noctis Layrinthus and Valles Marineris and escarpments within the fretted terrain of Sacra Fossae and Kasei Valles show distinct erosional base levels at depths of 0.3-0.6 km, 1 km, and 2-3 km. The shallowest discontinuity corresponds to thickness estimates for the ridged plains unit in this region, and thus the discontinuity probably is the contact between a sequence of layered rock making up this unit and the underlying megaregolith. The 1-km discontinuity is reflected in the base levels of erosion of all the features studied, and it may correspond to the base of the proposed layer of ground ice. Model calculations using photoclinometric profiles of simple grabens and the 60{degree} dip of bounding faults show that graben-bounding faults consistently intersect at the mechanical discontinuity at about 1 km depth. This discontinuity may represent an interface between ice-laden and dry regolith, ice-laden and water-laden regolith, or pristine and cemented regolith. A correlation between wall valley head depth and local thickness of the faulted layer suggests that the 1-km discontinuity also controlled the depth of the heads of sapping canyons. The third discontinuity, at a depth of 2-3 km, corresponds to the proposed base of the Martian megaregolith and is probably the interface between overlying, ejected breccia and in situ, fractured basement rocks.

  7. Bulk, rare earth, and other trace elements in Apollo 14 and 15 and Luna 16 samples.

    NASA Technical Reports Server (NTRS)

    Laul, J. C.; Wakita, H.; Showalter, D. L.; Boynton, W. V.; Schmitt, R. A.

    1972-01-01

    Measurement of 24 and 34 bulk, minor, and trace elements in lunar specimens by instrumental and radiochemical neutron activation analysis shows greater Al2O3, Na2O, and K2O abundances and higher TiO2, FeO, MnO and Cr2O3 depletions in Apollo 14 soil samples as compared to Apollo 11 samples and to most of Apollo 12 samples. The uniform abundances in 14230 core tube soils and three other Apollo 14 soils indicate that the regolith is uniform to at least 22 cm depth and within about 200 m from the lunar module.

  8. Luna B. Leopold--pioneer setting the stage for modern hydrology

    USGS Publications Warehouse

    Hunt, Randall J.; Meine, Curt

    2012-01-01

    In 1986, during the first year of graduate school, the lead author was sampling the water from a pitcher pump in front of “The Shack,” the setting of the opening essays in Aldo Leopold's renowned book A Sand County Almanac. The sampling was part of my Master's work that included quarterly monitoring of water quality on the Leopold Memorial Reserve (LMR) near Baraboo, Wisconsin. The Shack was already a well-known landmark, and it was common to come upon visitors and hikers there. As such, I took no special note of the man who approached me as I was filling sample bottles and asked, as was typical, “What are you doing?”

  9. Ex luna, scientia: lunar occultation as a paradigm for nuclear astrophysics

    NASA Astrophysics Data System (ADS)

    Miller, Richard S.; Lawrence, David J.; Peplowski, Patrick N.; Goldsten, John O.; Ozimek, Martin T.; Scott, Christopher J.; Leary, James C.; Grant, Dave; Young, C. Alex

    2016-07-01

    Next-generation nuclear astrophysics investigations must address a demanding set of requirements to probe the matter and energy life-cycle in our Galaxy and throughout the Cosmos. Enhanced flux sensitivity and (near) all-sky monitoring are just two of these requirements; cost effectiveness and other programmatic restrictions pose additional challenges. These competing goals can be addressed with a paradigm change, i.e. performing investigations from lunar orbit and utilizing a new detection and imaging technique. We report on our development of the Moon as a platform for nuclear astrophysics utilizing the Lunar Occultation Technique (LOT). Here source fluxes are temporally modulated as they are repeatedly occulted by the Moon; the modulation, as observed by a suitably configured instrument in lunar orbit, enables the detection, imaging, and characterization of both point- and extended-sources, narrow-line and broadband sources. Key benefits include maximizing the ratio of sensitive-to-total deployed mass and the operational simplicity relative to other detection schemes. A mission based on the LOT, the Lunar Occultation Explorer (LOX), will be the first to employ occultation as the principle method to characterize the intensity, variability, and spectra of detected sources.

  10. Percepción del tamaño de la Luna

    NASA Astrophysics Data System (ADS)

    Lares, M.

    When Lunar astronomical phenomena are communicated to the general public, changes in the Lunar disc size are usually bring out. However, the perception of such change is different to the change itself. In this work a quantification of the sensation of change in the area is proposed, based on results from cognitive sciences. FULL TEXT IN SPANISH

  11. Ex Luna Scientia! A New Paradigm for Nuclear Gamma-Ray Astrophysics

    NASA Astrophysics Data System (ADS)

    Miller, Richard Scott; Bonamente, M.; Ebbets, D.; Freelove, R.; Harwit, A.; Lawrence, D. J.; O'Brien, S.; Paciesas, W. S.; Young, C. A.

    2010-03-01

    The Lunar Occultation Observer (LOCO) is a new gamma-ray astrophysics mission concept being developed to probe the nuclear regime (( 0.1-10 MeV). LOCO will perform an all-sky survey of the Cosmos at nuclear energies, and will the have capability to address multiple high-priority science goals. Placed into lunar orbit, LOCO will utilize the Moon's unique environment to maximize performance relative to terrestrial-orbit endeavors with similar science goals. Specifically, LOCO will use the Moon to occult astrophysical sources as they rise and set along the lunar limb. The encoded temporal modulation will then be used to image the sky thereby enabling spectroscopic, time-variability, point- & extended-source analyses. This Lunar Occultation Technique (LOT) enables the excellent flux sensitivity, position, and energy resolution required of the next-generation nuclear astrophysics mission. In addition, occultation imaging eliminates the need for complex, position sensitive detectors. The LOCO concept is cost-effective, competitive, and has a straightforward and scaleable implementation. I will review the top-level mission concept, simulations and performance estimates, detector development efforts, mission implementation strategies and tradeoffs, as well as the astrophysics and secondary lunar science goals. This work was supported in part by National Aeronautics and Space Administration grants NNG06GF74G and National Science Foundation grant ATM-0421267. One author (RSM) also acknowledges support of the National Space Science & Technology Center through cooperative agreement grants NCC8-200 and NNM05AA22A.

  12. Singing in "La Voce Della Luna" Italian Women's Choir in Melbourne, Australia

    ERIC Educational Resources Information Center

    Southcott, Jane; Joseph, Dawn

    2015-01-01

    Australia is a country of ongoing migration that embraces diversity, creative expression and cultural activity. Membership of community music groups by older people can enhance life quality, and may provide a space through which cultural and linguistic identity may be shared and celebrated. This qualitative phenomenological case study explores…

  13. Singing in "La Voce Della Luna" Italian Women's Choir in Melbourne, Australia

    ERIC Educational Resources Information Center

    Southcott, Jane; Joseph, Dawn

    2015-01-01

    Australia is a country of ongoing migration that embraces diversity, creative expression and cultural activity. Membership of community music groups by older people can enhance life quality, and may provide a space through which cultural and linguistic identity may be shared and celebrated. This qualitative phenomenological case study explores…

  14. Gamma-spectrometric analysis of Luna 16 sample of lunar surface material

    NASA Technical Reports Server (NTRS)

    Surkov, Y. A.; Fedoseyev, G. A.; Sobornov, O. P.; Nazarkina, G. B.; Bachina, L. P.

    1974-01-01

    Using a scintillation gamma spectrometer with shielding against anticoincidences, the content of the natural radioelements (K, U, and Th) and long-lived cosmogenic radioisotopes (Al-26, Na-22, and Mn-54) in a sample of Sea of Fertility regolith was determined. Based on the content data of natural radioelements, an attempt was made to classify this sample in the scale of petrochemical types of terrestrial rocks arranged in accordance with their silicic content and alkalinity. Within the frame of reference of calcium-uranium systematics of lunar samples, a comparison was made of the K/U ratio obtained for the Sea of Fertility sample with analogous data for other regions of the moon. Also discussed are problems on the depthwise distribution of cosmogenic radioisotopes along the regolith profile.

  15. Lunar Samples: Apollo Collection Tools, Curation Handling, Surveyor III and Soviet Luna Samples

    NASA Technical Reports Server (NTRS)

    Allton, J.H.

    2009-01-01

    The 6 Apollo missions that landed on the lunar surface returned 2196 samples comprised of 382 kg. The 58 samples weighing 21.5 kg collected on Apollo 11 expanded to 741 samples weighing 110.5 kg by the time of Apollo 17. The main goal on Apollo 11 was to obtain some material and return it safely to Earth. As we gained experience, the sampling tools and a more specific sampling strategy evolved. A summary of the sample types returned is shown in Table 1. By year 1989, some statistics on allocation by sample type were compiled [2]. The "scientific interest index" is based on the assumption that the more allocations per gram of sample, the higher the scientific interest. It is basically a reflection of the amount of diversity within a given sample type. Samples were also set aside for biohazard testing. The samples set aside and used for biohazard testing were represen-tative, as opposed to diverse. They tended to be larger and be comprised of less scientifically valuable mate-rial, such as dust and debris in the bottom of sample containers.

  16. Geometry of river channels: Discussion by William W. Emmett and Luna B. Leopold

    USGS Publications Warehouse

    Emmett, William W.; Leopold, Luna Bergere

    1964-01-01

    For many years river engineers and geomorphologists have sought a rationale for the general similarity that can be observed among river channels from various environments. Some aspects of this general comparability were noted a century ago by Playfair, and other aspects were examined in a more quantitative way approximately 10 yr ago by R. E. Horton. Such similarities with respect to the channel cross section and the associated hydraulic parameters and their changes downstream were studied by some of the engineers who attained prominence for their work on the self-adjusting irrigation canals of India, especially G. Lacy,15 C. Inglis,16 and T. Blench.17 Among these men, canal characteristics were the principal objects of investigation, although natural river channels assumed an increasing share of the attention of the students of "regime analysis," especially Blench. L. B. Leopold and T. Maddock18 developed a scheme by which the average relationships among form and hydraulic parameters could be easily described, this description being the one on which the author chose to elaborate.

  17. Electron Microprobe Analyses of Lithic Fragments and Their Minerals from Luna 20 Fines

    NASA Technical Reports Server (NTRS)

    Conrad, G. H.; Hlava, P. F.; Green, J. A.; Moore, R. B.; Moreland, G.; Dowty, E.; Prinz, M.; Keil, K.; Nehru, C. E.; Bunch, T. E.

    1973-01-01

    The bulk analyses (determined with the broad beam electron microprobe technique) of lithic fragments are given in weight percentages and are arranged according to the rock classification. Within each rock group the analyses are arranged in order of increasing FeO content. Thin section and lithic fragment numbers are given at the top of each column of analysis and correspond to the numbers recorded on photo mosaics on file in the Institute of Meteoritics. CIPW molecular norms are given for each analysis. Electron microprobe mineral analyses (given in oxide weight percentages), structural formulae and molecular end member values are presented for plagioclase, olivine, pyroxene and K-feldspar. The minerals are selected mostly from lithic fragments that were also analyzed for bulk composition. Within each mineral group the analyses are presented according to the section number and lithic fragment number. Within each lithic fragment the mineral analyses are arranged as follows: Plagioclase in order of increasing CaO; olivine and pyroexene in order of increasing FeO; and K-feldspar in order of increasing K2O. The mineral grains are identified at the top of each column of analysis by grain number and lithic fragment number.

  18. Condiciones de fase y continuación analítica de órbitas periódicas de transferencia rápida de RTBP Tierra-Luna al problema cuasi-circular Sol-Tierra-Luna

    NASA Astrophysics Data System (ADS)

    Leiva, A. M.; Briozzo, C. M.

    We present a first order necessary condition for the value of the initial Solar phase, allowing the analytic continuation of periodic orbits from the Earth-Moon Restricted Three Body Problem (RTBP) to the Sun-Earth-Moon Quasi-Bicircular Problem (QBCP). We apply this condition to several fast Earth-Moon transfer orbits, detailing the final orbits obtained for the QBCP.

  19. Review of Ilatha Fischer (Hymenoptera: Braconidae: Alysiinae), including descriptions of six new species and a key to species

    USDA-ARS?s Scientific Manuscript database

    The following new species from the Neotropical Region are described: Ilatha buffingtoni Kula, Dix-Luna, and Shaw; Ilatha cloptoni Kula, Dix-Luna, and Shaw; Ilatha dasygaster Kula, Dix-Luna, and Shaw; Ilatha henospilota Kula, Dix-Luna, and Shaw; Ilatha plaumanni Kula, Dix-Luna, and Shaw; and Ilatha s...

  20. Sistema Solar: de la observación de La Tierra a los planetas gigantes y sus lunas

    NASA Astrophysics Data System (ADS)

    Rodrigo, R.

    La fotoquímica tiene un papel principal en la composición de las atmósferas planetarias. Se examinan diferentes procesos fotoquímicos tanto para atmósferas oxidadas como reductoras, poniendo un especial énfasis en los ciclos químicos más importantes. En este sentido, se presentan diferentes ciclos químicos capaces de producir hidrocarbonos y nitrilos en atmósferas reductoras, así como aquellos capaces de mantener las proporciones de mezcla de las moléculas que contienen oxígeno, tales como CO2, O2 y H2O. También se analizan otros procesos importantes tales como la condensación y procesos de sputtering y de sublimación que han de tenerse en cuenta cuando se realizan modelos sobre la composición atmosférica.

  1. L'Astronomia del Venerdí Santo, l'eclissi di Luna e l'ora della Sindone

    NASA Astrophysics Data System (ADS)

    Sigismondi, Costantino

    2014-05-01

    Dating the crucifixion on friday 3 April 33, when, at sunset a partially eclipsed Moon rised allows to interprete the speech of Saint Peter (Acts 2:20=Joel 3:4) on the day of Pentecost as including an account of this eclipse, as fulfillment of the Scriptures. Few minutes later the apparition of a third star of medium magnitude stated the beginning of the sabbatical rest: before that time Jesus has been buried, wrapped into the shroud. The observations of the equinoctial moonrise from the Mount of Olives on September 2013 are strongly in favour of the hypotehsis of possible observation of the lunar eclipse of 33 AD by Jewish people, as well as the sunrises observed from the Temple Institute terrace in Southern-East Jerusalem demonstrated that this eclipse could have been seen from Jerusalem. The depression of the horizon and the refraction allow to see Sun and Moon more than 1 degree below the geometrical horizon in the azimuthal direction ranging from 90 to 116, prologing to 16 minutes the duration of the partial lunar eclipse observed in 33AD. Texts of Matthew, Mark and Cyrillus of Jerusalem are also commented.

  2. Measurement of density and porosity of lunar rocks based on samples of Luna 16 automatic lunar station

    NASA Technical Reports Server (NTRS)

    Volynets, V. F.; Florenskiy, K. P.; Ivanov, A. V.

    1974-01-01

    Three fragments of holocrystalline igneous rocks of the gabbro type, weighing 30 to 50 mg each, were investigated. The density of the fragments was established with a mercury pycnometer and was found to be 3.05 to 3.12 g/cu cm, with a relative error not more than 2 percent. The porosity was found for the difference between the volumes determined with the mercury and with the gas techniques; for all three samples together it was 13 percent, and the error of determination was 70 percent owing to the small volumes. It can be anticipated that the porosity of the rock in bulk will be higher than the value obtained based on small fragments. The porosity of lunar rocks can markedly affect the isostatic distribution of rocks and must be taken into account when developing models of lunar structure.

  3. Effects of the Mi-1, N and Tabasco Genes on Infection and Reproduction of Meloidogyne Mayaguensis on Tomato and Pepper Genotypes

    USDA-ARS?s Scientific Manuscript database

    Meloidogyne mayaguensis is a damaging root-knot nematode that is able to reproduce on root-knot nematode-resistant tomato and other economically important crops. In a growth chamber experiment conducted at 22 and 33 C, isolate 1 of M. mayaguensis reproduced at both temperatures on the Mi-1-carrying...

  4. [Prevalence and gravity of depression and anxiety in patients with obesity and type 2 diabetes: a study in the population of Tabasco, Mexico].

    PubMed

    Martínez Hernández, Fátima; Tovilla Zárate, Carlos Alfonso; López Narváez, Lilia; Juárez Rojop, Isela E; Jiménez Santos, María A; González Gutiérrez, Cristell P; Pool García, Sherezada

    2014-12-01

    The aim of this study was to assess the prevalence of anxiety and depression in groups of obese and normal-weight individuals with type 2 diabetes. Also, to analyze the severity of depression in type 2 diabetics by taking into account the body mass index in people with this condition. This study included 702 patients with type 2 diabetes, 236 with normal weight, and 231 with obesity. All participants completed a demographic questionnaire, the Hamilton Anxiety Rating Scale and the Hamilton Depression Rating Scale. In patients with obesity, 48.48% (95% CI: 41.82-55.14) were positive for anxiety and 49.78% (95% CI: 43.11-56.44) for depression. A significant correlation existed between the Hamilton Depression Rating Scale and body mass index with a correlation coefficient of 0.11 (p = 0.003). Also, a significant correlation coefficient equal to 0.107 (p = 0.005) between the Hamilton Anxiety Rating Scale and body mass index was found. In addition, when we analyzed depression scores, significant differences were encountered for gender between normal-weight and obesity groups in the range of severe (p = 0.01) and very severe (p = 0.04) cases. In view of the existing relationships observed among obesity, depression, anxiety, and gender in type 2 diabetics, we consider that a psychological intervention is necessary for an integral management of these patients.

  5. Dedos de Luna. Children's Literature in Spanish: Bilingual Edition. Guia para maestros en espanol e ingles. Elementary Literature Series, Part II.

    ERIC Educational Resources Information Center

    Walker, Dana; Huerta, Mario

    This curriculum unit is designed to give primary school students foreign language experiences and also to support the cultural literacy strand of the California State History-Social Science Framework. The unit is part of an elementary literature series which utilizes quality primary source literature from various world regions and countries and…

  6. Flood pulse trophic dynamics of larval fishes in a restored arid-land, river-floodplain, Middle Rio Grande, Los Lunas, New Mexico

    Treesearch

    Hugo A. Magana

    2013-01-01

    Rio Grande water is intensively managed and regulated by international and interstate compacts, Native American treaties, local water rights, and federal, state, and local agencies. Legislation and engineering projects in the early twentieth century brought about water impoundment projects and channelization of the Rio Grande which led to the eventual loss of...

  7. Mapas dinamicos de trayectorias rapidas para un valor dado de la constante de Jacobi en el problema de tres cuerpos restringido Tierra-Luna

    NASA Astrophysics Data System (ADS)

    Leiva, A. M.; Briozzo, C. M.

    Starting from the numerical integration of 1736649 trajectories we study the behaviour of 783209 trajectories in the Earth-Moon Circular Restricted Three Body Problem, for a value h=-1.5887 of the Jacobi constant. Many of these trajectories are of great interest because they take place between the primary masses for times shorter than 217 days and show close approaches to the Moon. On a surface of section we show dynamical maps which provide a global description of the main features of these trajectories, and show the optimal regions to search for periodic orbits and for orbits colliding with the Moon. FULL TEXT IN SPANISH

  8. Stratigraphy and sedimentology of the Cambrian base (La Herrería Formation) in the area of Los Barrios de Luna (N of Spain)

    NASA Astrophysics Data System (ADS)

    Florez Rodriguez, Adriana Georgina; Aramburu, Carlos; Toyos, Jose Maria

    2017-04-01

    La Herrería Formation comprises the base of the Cambrian in the Cantabrian Zone (ZC), the external part of the Variscan Orogen in the NW Iberian Peninsula (Spain). In other zones of the Iberian Massif, comparable stratigraphic formations are found overlying the Precambrian basement: La Herrería Formation lays with angular unconformity over the Narcea-Mora Formation. Previous studies have proposed a variety of interpretations for the Herrería Formation. Based on the identified facies and facies associations, in this study it is interpreted in terms of progradation and abandonment of a braidplain delta system, in agreement with some of the previous investigations. Due to its particular location within a foreland fold-and-thrust belt, the formation appears dismembered so that relatively distal sections are currently found displaced towards the NE. Through the analysis of previously investigated and newly identified outcrops, the present study aims to provide a better insight into the features of the sedimentary environment, as well as a detailed characterization of the entire formation, something that would facilitate its mapping in the complexly deformed study area. The study supports a previously proposed subdivision of the Herrería Formation in three informal members, and has identified a 5 m-thick level of fine-grained reddish and mica-rich sandstones proposed as the boundary between the lower and middle members, which has also been utilized as a marker bed for correlations among the different sections. The lower member is formed by shaly to sandy facies associations of pro-delta and delta front, and can include shallow-water carbonates deposited during delta lobe temporal abandonment. Within the middle member, the lower part is composed by coarse- to moderately-sorted feldspathic reddish sandstones of the delta plain, defining the top of a large-scale progradational sequence which starts at the lower member. Towards the upper part of this member, the sandstones turn into quartzarenites with glauconite, reflecting costal reworking by sea waves and then, the beginning of retrogradation. Finally, in the upper member, fine-grained-quarzarenites and shales are found, indicating a stronger marine influence interpreted as a consequence of a retrogradational trend that would culminate with the onset of carbonate deposition as shown by the limestones of the overlying Láncara Formation. Paleocurrent distribution analysis, based on cross-laminated sandstones, indicates that sedimentary supply was directed towards the SSW and that sediment redistribution occurred along a WNW-ESE trending paleoshore. Sedimentation would be linked to one of the graben basins created during the rifting that the northern margin of Gondwana was experiencing at that time.

  9. UAI Lunar Section: results in the last year. (Italian Title: SdR Luna: risultati conseguiti dal Congresso UAI di Senigallia ad oggi)

    NASA Astrophysics Data System (ADS)

    Mercatali, A.

    2013-02-01

    Results obtained by the UAI Lunar Section in the last 12 months are presented and discussed (Plato crater observations, Lunar Transient Phenomena research program, collaborations with BAA and ALPO, Lunar Italian Atlas project).

  10. Geologic characteristics of the Luna 17/Lunokhod 1 and Chang'E-3/Yutu landing sites, Northwest Mare Imbrium of the Moon

    NASA Astrophysics Data System (ADS)

    Basilevsky, A. T.; Abdrakhimov, A. M.; Head, J. W.; Pieters, C. M.; Wu, Yunzhao; Xiao, Long

    2015-11-01

    We compared and assessed the results of measurements and observations by the Lunokhod 1 and Yutu rovers, both of which explored the northwestern part of Mare Imbrium. Both sites are within the distinctive Eratosthenian-aged lava flow geologic unit and our comparisons showed that the geologies of these exploration sites are very similar. As in the majority of other areas of the Moon, the dominant landforms in these sites are small impact craters, having various degrees of morphologic prominence and states of preservation, and rock fragments, mostly associated with the rims and interiors of fresh craters. The shape and the degree of preservation of the observed rock fragments in these two sites are similar. In both sites sporadic rock fragments were observed whose morphologies suggest that their source rocks had columnar jointing. Localization of these specific rocks on the rims of 450-470 m in diameter craters implies that the source rocks are at depths of 40-50 m. Regolith in the study areas is typically a few meters thick, but locally can be much thicker. The ground penetrating radar of the Yutu rover revealed the multilayer regolith structure, which is determined by superposition of crater ejecta; with some local variations, this type of the regolith stratigraphy should be typical of the majority of lunar mare sites. The physico-mechanical properties of the regolith in these two sites appear to be rather similar: the bearing capacity ranges from 0.04 to 1.44 kg/cm2, with a modal value ∼0.45 kg/cm2, and the shear strength ranges from 0.02 to 0.1 kg/cm2, with a modal value ∼0.05 kg/cm2. Both these factors decrease by a factor of 3-4 with an increase of surface slope from ∼2 to 12°. The chemical composition of surface materials determined by the rover instruments at these two sites differ from those derived from the remote sensing data for the Eratosthenian-aged basalts on which the two sites are located. This could be partly due to low measurement accuracies, especially in the case of Lunokhod 1, but may also represent real variations in the composition of the surface materials compared to returned lunar samples. Difference in the spatial resolution of the in-situ and remote-sensing analyses should also be taken into account. Recommendations for future lunar rover missions are as follows: (1) to use ground penetrating radar and a robotic arm, and (2) to employ radial study tactics for impact crater documentation and analysis.

  11. Effect of lunar surface material on radiation damage in mice (investigation of biological action of lunar surface material returned to earth by Luna 16 automatic station)

    NASA Technical Reports Server (NTRS)

    Antipov, V. V.; Davydov, B. I.; Gaydamakin, N. A.; Lvova, T. S.; Petrukhin, V. G.; Komarova, S. N.; Skvortsova, Y. B.

    1974-01-01

    The effect was studied of lunar surface material from the Sea of Fertility on the radiation reaction (damage) in mice caused by exposure to ionizing radiation. The material was administered to the organism in three ways -- aerogenically, through the esophagus, or peritoneally. It was shown that administering the lunar surface material did not appreciably affect the death of the animals and the reaction of the peripheral blood caused by the action of radiation. In mice which prior to irradiation had been administered inhalationally or peritoneally the lunar surface material, a lag in the increment of bodyweight was observed.

  12. Effect of lunar surface material on radiation damage in mice (investigation of biological action of lunar surface material returned to earth by Luna 16 automatic station)

    NASA Technical Reports Server (NTRS)

    Antipov, V. V.; Davydov, B. I.; Gaydamakin, N. A.; Lvova, T. S.; Petrukhin, V. G.; Komarova, S. N.; Skvortsova, Y. B.

    1974-01-01

    The effect was studied of lunar surface material from the Sea of Fertility on the radiation reaction (damage) in mice caused by exposure to ionizing radiation. The material was administered to the organism in three ways -- aerogenically, through the esophagus, or peritoneally. It was shown that administering the lunar surface material did not appreciably affect the death of the animals and the reaction of the peripheral blood caused by the action of radiation. In mice which prior to irradiation had been administered inhalationally or peritoneally the lunar surface material, a lag in the increment of bodyweight was observed.

  13. Catálogo de familias generadoras de órbitas periódicas de transferencia rápida en el RTBP Tierra-Luna

    NASA Astrophysics Data System (ADS)

    Briozzo, C. M.; Leiva, A. M.

    We present a catalogue consisting of more than 70 Periodic Orbit (PO) Generating Families in the Earth--Moon Restricted Three Body Problem (RTBP). The orbits presented perform periodic transfers between the primaries, with periods shorter than 180 days, and have low energy. We also present the characteristic curves for the families, including the stability parameters.

  14. Dedos de Luna. Children's Literature in Spanish: Bilingual Edition. Guia para maestros en espanol e ingles. Elementary Literature Series, Part II.

    ERIC Educational Resources Information Center

    Walker, Dana; Huerta, Mario

    This curriculum unit is designed to give primary school students foreign language experiences and also to support the cultural literacy strand of the California State History-Social Science Framework. The unit is part of an elementary literature series which utilizes quality primary source literature from various world regions and countries and…

  15. Radio-Shield, il primo esperimento italiano sulla Luna. (English Title: Radio-Shield, the first Italian experiment on the Moon)

    NASA Astrophysics Data System (ADS)

    Barbarossa, M.

    2017-10-01

    Nextly, the first Italian and European experiment will reach the lunar surface. Selected in the international contest Lab2Moon for under-25, the goal of the experiment is to investigate about the possible shielding properties of cyanobacteria against space radiations. If these microorganisms, in addition to providing oxygen and other resources, can also shield from space radiation, they can be used in the development of radiation shields in future interplanetary missions.

  16. Influence of Salicylic Acid on In Vitro Micropropagation and Salt Tolerance in Two Hibiscus Species, H. acetosella and H. moscheutos (cv ‘Luna Red’)

    USDA-ARS?s Scientific Manuscript database

    Salicylic acid (SA) is a hormone-like substance that plays an important role in the regulation of plant growth and development. It has been reported to improve in vitro regeneration as well as induce abiotic stress tolerance in plants. The effects of varying SA concentrations (0, 0.5, and 1 mM) on i...

  17. 75 FR 62571 - Labor Surplus Area Classification Under Executive Orders 12073 and 10582

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-10-12

    ... Mexico Balance of Sandoval County, NM....... Sandoval County, NM Luna County, NM Luna County, NM Mora County, NM Mora County, NM New York Bronx County, NY Bronx County, NY Newburgh City, NY Orange County,...

  18. Soviet Union Lunar Sample Return Missions

    NASA Image and Video Library

    2010-03-15

    On February 21, 1972, Luna 20 soft landed in the rugged highlands between Mare Fecunditatis and Mare Crisium. The Luna 20 descent stage still sits silently on the Moon, clearly visible in this image taken by NASA Lunar Reconnaissance Orbiter.

  19. Can alien plants support generalist insect herbivores?

    Treesearch

    Douglas W. Tallamy; Meg Ballard; Vincent. D' Amico

    2010-01-01

    Simple rearing experiments were conducted to address two questions relevant to understanding how generalist lepidopteran herbivores interact with alien plants. Yellow-striped armyworm (Spodoptera ornithogalli), luna moth (Actias luna), bagworm (Thyridopteryx ephemeraeformis) and white-marked tussock moth (

  20. 78 FR 73438 - Reorganization of Sector Baltimore and Hampton Roads; Conforming Amendments

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-12-06

    ... rule, call or email Mr. Troy Luna, Fifth Coast Guard District, Coast Guard; telephone 757-398-7766, email Troy.T.Luna@uscg.mil . If you have questions on viewing the docket, call Renee V. Wright, Program...

  1. 76 FR 72969 - Proclaiming Certain Lands as Reservation for the Fort Sill Apache Indian Tribe

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-11-28

    ... to residence at such reservation. New Mexico Principal Meridian Luna County, New Mexico That part of... Twenty-four (24) south, Range Six (6) west, N.M.P.M., Luna County, New Mexico, being described as follows...

  2. 75 FR 57688 - Suspension of Community Eligibility

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-09-22

    ... of, Luna 350038 June 2, 1975, ......do Do. County. Emerg; June 15, 1979, Reg; October 19, 2010, Susp. Luna County, Unincorporated 350139 August 20, 1976, ......do Do. Areas. Emerg; September 14, 1990, Reg...

  3. 27 CFR 9.103 - Mimbres Valley.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ..., edition of 1964. (c) Boundaries. The Mimbres Valley viticultural area is located within Grant and Luna... an unimproved dirt road at benchmark 4911 in Luna County, New Mexico on the northern part of Section... map as Luna/Grant Country line), T19S/R10W on the Dwyer, N. Mex. U.S.G.S. map; (12) The boundary...

  4. Treatment of severe self-injurious and aggressive biting.

    PubMed

    Altmeyer, B K; Williams, D E; Sams, V

    1985-06-01

    The treatment of a 16-year-old severely mentally retarded and blind female client exhibiting severe biting of self and others consisted of the contingent application of an aversive gustatory stimulus (Tabasco Sauce), brief timeout, DRO, and contingent restraint against biting while in time-out. This is the first use of Tabasco as the aversive stimulus against biting. Deceleration of biting was rapid and maintained for 20 months after initiation of treatment.

  5. Positioning Vascularized Composite Allotransplantation within the Spectrum of Solid Organ Transplantation

    DTIC Science & Technology

    2014-10-01

    have purchased the Novadaq LUNA fluorescence angiography unit (under separate funding), and several of the hand surgeons participating in the hand...individual nerve bundles. With this technology we can get near-microscopic images in 8 Figure 2: ICG imaging using the LUNA in patient 7 at three...correlate these images with patient clinical course and graft function. We have obtained a clinical LUNA fluorescence angiography unit and an

  6. Genetic analysis and molecular mapping of a new powdery mildew resistant gene Pm46 in common wheat.

    PubMed

    Gao, Haidong; Zhu, Fangfang; Jiang, Yanjie; Wu, Jizhong; Yan, Wei; Zhang, Qiaofeng; Jacobi, Andreas; Cai, Shibin

    2012-09-01

    Powdery mildew (PM), caused by Blumeria graminis f. sp. tritici (Bgt), has become a serious disease and caused severe yield losses in the wheat production worldwide. Resistance gene(s) in wheat cultivars can be quickly overcome by newly evolved pathogen races when these genes are employed for long time or in a large area. It is urgent to search for new sources of resistance to be used in wheat breeding. Tabasco is a German resistant cultivar and a new source of resistance gene(s) to PM. An F(2) population was developed from a cross between Tabasco and a Chinese susceptible cultivar Ningnuo 1. Infection types in 472 F(2) plants and 436 F(2-3) families were evaluated by inoculating plants with isolate Bgt19. Results showed that a single dominant gene, designed Pm46, controlled powdery mildew resistance in Tabasco. This gene was located to the short arm of chromosome 5D (5DS) and flanked by simple sequence repeat markers Xgwm205 and Xcfd81 at 18.9 cM apart. Because another resistance gene Pm2 was also located on 5DS, 15 Bgt isolates were used to inoculate Tabasco and Ulka/8*Cc (Pm2 carrier). The results showed that Tabasco was highly resistant to all of the 15 isolates tested, while Ulka/8*Cc was susceptible to 4 of the isolates, suggesting that Tabasco may carry resistant gene(s) different from Pm2 gene in Ulka/8*Cc. To test the allelism between Pm46 and Pm2, an F(2) population between Tabasco and Ulka/8*Cc was developed. Isolate Bgt2, avirulent to both parents, was used to evaluate the F(2) population and two susceptible plants were identified from 536 progenies with F(2) plants. This result indicated that Pm46 is not allelic to Pm2. Therefore, Pm46 is a new gene for PM resistance identified in this study.

  7. Rio Grande Youth Care Center. Final Report.

    ERIC Educational Resources Information Center

    1974

    A non-profit counseling and referral center, the Center was established in 1972 to alleviate delinquency problems in Los Lunas (New Mexico), with special reference to Chicanos. The Center used specific direct youth services to identify: barriers to services for Chicanos in Los Lunas and to provide referral services to overcome those barriers;…

  8. Exploiting Explicit and Implicit Structure in Complex Optimization Problems

    DTIC Science & Technology

    2014-09-24

    Applications 161(1) (2014) 179-198. [4] J.P. Luna , C. Sagastizábal and M. Solodov, A class of Dantzig--Wolfe type decomposition methods for variational...inequality problems, Mathematical Programming 143 (2014) 177-209. [5] J.P. Luna , C. Sagastizábal and M. Solodov, Complementarity and

  9. Family Studies of Sensorimotor and Neurocognitive Heterogeneity in Autism Spectrum Disorders

    DTIC Science & Technology

    2014-11-01

    47, doi: 10.1186/2040-2392-5-47. Takarae Y, Minshew NJ, Luna B, Sweeney JA. (2004a). Oculomotor abnormalities parallel cerebellar histopathology in...autism. Journal of neurology, neurosurgery, and psychiatry, 75, 1359-1361, doi:10.1136/jnnp.2003.022491 Takarae Y, Minshew NJ, Luna B, Krisky CM

  10. Resolving the agriculture-petroleum conflict: the experience of cacao smallholders in Mexico

    SciTech Connect

    Scherr, S.J.

    1983-01-01

    In 1972, PEMEX, the Mexican national oil company, discovered huge reserves of oil and natural gas along the Gulf Coast, and began intensive exploitation in Tabasco and northern Chiapas states. Severe conflict between PEMEX and the agricultural economy of Tabasco seemed certain. But despite problems of labor scarcity, inflation, migration, pollution, agricultural production 1974 to 1979 increased for the state's major products - cacao, coconut, beef, and bananas. This study analyzes how agriculture-petroleum conflicts have been resolved in Tabasco, and how relevant its experience is to other agricultural areas undergoing rapid large-scale industrial development. Cacao farming was chosen as a case study. Detailed farm budget, family employment, and technical production data were used to document farm production strategies. Research results suggest that resolution of agriculture-petroleum conflicts depends on: demographic conditions, employment conditions, agricultural prices, petroleum company flexibility, government development policy, and farmer political strength. Support for the campesino sector is critical.

  11. Mineralogic and petrologic studies of meteorites and lunar samples

    NASA Technical Reports Server (NTRS)

    Wood, J. A.

    1984-01-01

    During a 13 year period beginning in 1971, the Extraterrestrial Petrology Group examined lunar soils from all 6 Apollo missions and those returned by the Soviet Luna 16, Luna 20, and Luna 24 missions. In addition, the properties and apparent origin of the carbonaceous chondrites were examined. Chondrules, calcium-aluminum-rich inclusions (CAI) and the fine grained matrix materials that accompany chondrules and CAI's in primitive meteorites were investigated. The effects of planetary hydrothermal alteration of matrix materials in the C1 chondrite was also investigated. Full length papers and extended abstracts published during the grant are listed chronologically.

  12. Heavy Gas Dispersion Test Summary Report

    DTIC Science & Technology

    1989-06-01

    Gifford’s work is presented here. Studies by Luna and Church (References 38, 39), Goldner (Reference 40), and others show that qualitative stability...1977. 37. Dyer, A.J., A review of flux-profile relationships, Boundary-Layer Meteorology, vol. 7, pp. 363-372, 1974. -60- 38. Luna , R.E., and Church...Massachusetts; also, USAEC Report SC-DC-70-5443, Sandia National Laboratories, Livermore, California, 1910. 39. Luna , R.E. and Church, H.W., "A Comparison of

  13. GLOBAL WARMING AND POSSIBLE EFFECTS ON FUTURE THE BRAZILIAN GRAIN PRODUCTION Hilton S. Pinto.State University of Campinas (UNICAMP). CNPq. Eduardo D. Assad. Embrapa Agriculture Informatics (CNPTIA). CNPq. Eduardo Pavao. Embrapa Agriculture Informatics (CNPTIA). Ricardo Luna. Embrapa Agriculture Informatics (CNPTIA)

    NASA Astrophysics Data System (ADS)

    Pinto, H. S.; Assad, E. D.; Pavao, E.; Luna, R.

    2012-12-01

    According to the Brazilian Government (CONAB, July 2012) the actual area of grain production in the country is close to 50.8 million ha and the perspective of production is 162.6 million of tons. Maize and Soybean are responsible for more than 83% of the total harvest. The area available for agriculture in Brazil is 282.2 million ha or close to 33% of the total land of the country. From 1991 until 2010 the agricultural technology was responsible for an increase of production close to 154% while the planted area raised only 25%. Considering this rate of production in the last 20 years the Ministry of Agriculture made an extrapolation for 2020, when the country can produce close to 176 million of grains being 65 million tons of maize, 86 million tons of soybean and 70 million bags of coffee. In this case, it was not considered any variation in the climate conditions. In 2002, in partnership with the British Embassy in Brazil, Unicamp and Embrapa published the study "Global Warming and the New Geography of Agricultural Production in Brazil" (Pinto and Assad, 2002) based on a Regional Climate Model PRECIS from Hadley Centre, where the grain production was estimated to decrease due to temperature rise. Without considering any mitigation or adaptation action, in the worst scenario (A2-IPCC) the principal crops to be affected will be coffee with 6.7% estimated production decrease until 2020, soybean 22% and corn 12%. On the other hand, sugar cane, as a C4 plant, will have an increase of production in the order of 170%. As suggested by the Word Bank, a new project was developed for a more detailed analysis of the influence of the global warming in the Brazilian agriculture, affecting temperature and water deficit in the years 2020 and 2030. It was considered initially 23 Global Climatic Models (GCM) defined by IPCC, that were separated in blocks of similar comportment using cluster multivariate analysis. Other 3 Regional Climatic Models (RCM) were also used to give more detailed information of the future scenarios: PRECIS, BRAMS and ETA. The 4 GCMs that showed more similarity among themselves and the 3 RCM were used as simulation models with similar behavior for establishing the new scenarios for 2020 and 2030. The better and the worst forecast of the curves were used as simulation points for the future agriculture scenarios. In Brazil, most part of the agricultural plantation as well as the insurance are financed by the Ministry of Agriculture that has a basic directive of following the Public Policy Program of Climatic Risk Zoning for authorizing what, when and where to plant according to climate predominance. Based in this program and in the new climatic scenarios provided by the 7 models, a new geography for Brazilian agriculture was suggested for the years 2020 and for 2030 showing the same pessimistic tendency of decrease in production close to 24% for soybean and 19% for maize summer season as compared to 2012. The results obtained with this study were used as input for the economics complimentary analysis of Brazilian possible modification of the agribusiness until the years 2020 and 2030.

  14. Commentary on: "An integrated metabolic atlas of clear cell renal cell carcinoma." Hakimi AA, Reznik E, Lee CH, Creighton CJ, Brannon AR, Luna A, Aksoy BA, Liu EM, Shen R, Lee W, Chen Y, Stirdivant SM, Russo P, Chen YB, Tickoo SK, Reuter VE, Cheng EH, Sander C, Hsieh JJ.: Cancer Cell. 2016 Jan 11;29(1):104-16.

    PubMed

    Lee, Byron H

    2017-09-01

    Dysregulated metabolism is a hallmark of cancer, manifested through alterations in metabolites. We performed metabolomic profiling on 138 matched clear cell renal cell carcinoma (ccRCC)/normal tissue pairs and found that ccRCC is characterized by broad shifts in central carbon metabolism, one-carbon metabolism, and antioxidant response. Tumor progression and metastasis were associated with metabolite increases in glutathione and cysteine/methionine metabolism pathways. We develop an analytic pipeline and visualization tool (metabolograms) to bridge the gap between TCGA transcriptomic profiling and our metabolomic data, which enables us to assemble an integrated pathway-level metabolic atlas and to demonstrate discordance between transcriptome and metabolome. Lastly, expression profiling was performed on a high-glutathione cluster, which corresponds to a poor-survival subgroup in the ccRCC TCGA cohort. Copyright © 2017 Elsevier Inc. All rights reserved.

  15. Smoke from Fires in Southern Mexico

    NASA Image and Video Library

    2002-05-08

    On May 2, 2002, numerous fires in southern Mexico sent smoke drifting northward over the Gulf of Mexico. These views from NASA Terra satellite illustrate the smoke extent over parts of the Gulf and the southern Mexican states of Tabasco, Campeche and Ch

  16. Decreasing Mattress Ripping Using Forced Practice.

    ERIC Educational Resources Information Center

    Bluestone, Michael A.

    A deaf, profoundly retarded institutionalized 20-year-old, who engaged in mattress ripping, was required to participate in forced practice behavioral training. Repeatedly physically guided through ripping mattresses, he was given the aversive consequence of a squirt of tabasco sauce solution. After 5 weeks of intensive behavioral training and a 3…

  17. The Identity of Culex (Melanoconion) taeniopus Dyar and Knab and Related Species with Notes on the Synonymy and Description of a New Species (Diptera, Culicidae)

    DTIC Science & Technology

    1980-01-01

    Widespread from Tabasco in Mexico southwards to Corrientes in Argentina. 466 specimens examined: 251 d’, 160 9, 44 L, 11 P; 22 individual rearings (10...pupal, 12 larval). MEXI co. Il’abasco: Cardenas, "Colegio Superior de Agricultura Tropical", 20 mm, 15 Jul 70, D. & K. Schroeder (MEX 564), 2 9 (USNM

  18. Thicknesses of and Primary Ejecta Fractions in Basin Ejecta Deposits

    NASA Technical Reports Server (NTRS)

    Haskin, Larry A.; McKinnon, William B.

    2003-01-01

    We have developed a model for production of ba-sin ejecta deposits to address provenances of materials collected at the Apollo and Luna landing sites and for consideration in interpreting remote sensing data.

  19. Thicknesses of and Primary Ejecta Fractions in Basin Ejecta Deposits

    NASA Technical Reports Server (NTRS)

    Haskin, Larry A.; McKinnon, William B.

    2003-01-01

    We have developed a model for production of basin ejecta deposits to address provenances of materials collected at the Apollo and Luna landing sites and for consideration in interpreting remote sensing data.

  20. Results of investigation of the surface layer of the moon on the basis of its intrinsic radiation

    NASA Technical Reports Server (NTRS)

    Troitskiy, V. S.; Tikhonova, T. V.

    1974-01-01

    The intrinsic thermal radiation of the moon is an indicator of the temperature regime of the lunar surface, its physical conditions and structure, as indicated by data from Luna 9 and 13, as well as Surveyor 1 to 7.

  1. Thicknesses of and Primary Ejecta Fractions in Basin Ejecta Deposits

    NASA Technical Reports Server (NTRS)

    Haskin, Larry A.; McKinnon, William B.

    2003-01-01

    We have developed a model for production of ba-sin ejecta deposits to address provenances of materials collected at the Apollo and Luna landing sites and for consideration in interpreting remote sensing data.

  2. Thicknesses of and Primary Ejecta Fractions in Basin Ejecta Deposits

    NASA Technical Reports Server (NTRS)

    Haskin, Larry A.; McKinnon, William B.

    2003-01-01

    We have developed a model for production of basin ejecta deposits to address provenances of materials collected at the Apollo and Luna landing sites and for consideration in interpreting remote sensing data.

  3. P-Bearing Olivines in Lunar Rocks: A New View on Lunar Phosphorus

    NASA Astrophysics Data System (ADS)

    Demidova, S. I.; Brandstätter, F.; Ntaflos, Th.; Kononkova, N. N.

    2017-05-01

    We report about finding of P-bearing olivines in lunar samples of Luna 16, 20, Apollo 14, and in Dhofar 025, 961, 287 lunar meteorites and discuss their implications for lunar petrology and geochemistry.

  4. A Success Story of Philippine Counterinsurgency: A Study of Bohol

    DTIC Science & Technology

    2011-06-10

    Romeo Brawner, Lieutenant Colonel Alex Luna , and Lieutenant Colonel Manuel Sequitin, who unselfishly gave their time and effort while I was searching...Philippine Army Fort Magsaysay, Nueva Ecija, Philippines Office of Bohol Provincial Development Office Tagbilaran City, Bohol, Philippines

  5. The Age of the Crisium Impact Basin

    NASA Astrophysics Data System (ADS)

    van der Bogert, C. H.; Hiesinger, H.; Spudis, P.

    2017-05-01

    CSFD measurements of newly discovered Crisium impact melt remnants give absolute model ages consistent with radiometric ages of Luna 20 samples. Our new Crisium N(1) fits the lunar chronology function better than the previous value.

  6. MC-10 Lanae Palus Region

    NASA Technical Reports Server (NTRS)

    1994-01-01

    Mars digital-image mosaic merged with color of the MC-10 quadrangle, Lanae Palus region of Mars. The western part is dominated by lava flows of the Tharsis region. The central part includes ridged terrain of Lunae Planum. The west and north borders of Lunae Planum are dissected by the large, relatively young outflow channel, Kasei Vallis, which terminates in Chryse Planitia. Latitude range 0 to 30 degrees, longitude range 45 to 90 degrees.

  7. Hazard Response Modeling Uncertainty (A Quantitative Method)

    DTIC Science & Technology

    1988-10-01

    Accidental Release Model (HARM) for application to accidental spills at Titan II sites. A rocket exhaust diffusion model developed by the H.E. Cramer...59 . .......... ignored. But Luna and Church (Reference 73), among others, show that the scatter in observed values of a- associated with each...No. 79, Atmospheric Turbulence and Diffusion Laboratory, 1973. 100 73. Luna , R.E., an H.W. Church, "A Comparison of Turbulence Intensity and Stability

  8. System Engineering Paper

    NASA Technical Reports Server (NTRS)

    Heise, James; Hull, Bethanne J.; Bauer, Jonathan; Beougher, Nathan G.; Boe, Caleb; Canahui, Ricardo; Charles, John P.; Cooper, Zachary Davis Job; DeShaw, Mark A.; Fontanella, Luan Gasparetto; hide

    2012-01-01

    The Iowa State University team, Team LunaCY, is composed of the following sub-teams: the main student organization, the Lunabotics Club; a senior mechanical engineering design course, ME 415; a senior multidisciplinary design course, ENGR 466; and a senior design course from Wartburg College in Waverly, Iowa. Team LunaCY designed and fabricated ART-E III, Astra Robotic Tractor- Excavator the Third, for the team's third appearance in the NASA Lunabotic Mining competition. While designing ART-E III, the team had four main goals for this year's competition:to reduce the total weight of the robot, to increase the amount of regolith simulant mined, to reduce dust, and to make ART-E III autonomous. After many designs and research, a final robot design was chosen that obtained all four goals of Team LunaCY. A few changes Team LunaCY made this year was to go to the electrical, computer, and software engineering club fest at Iowa State University to recruit engineering students to accomplish the task of making ART-E III autonomous. Team LunaCY chose to use LabView to program the robot and various sensors were installed to measure the distance between the robot and the surroundings to allow ART-E III to maneuver autonomously. Team LunaCY also built a testing arena to test prototypes and ART-E III in. To best replicate the competition arena at the Kennedy Space Center, a regolith simulant was made from sand, QuickCrete, and fly ash to cover the floor of the arena. Team LunaCY also installed fans to allow ventilation in the arena and used proper safety attire when working in the arena . With the additional practice in the testing arena and innovative robot design, Team LunaCY expects to make a strong appearance at the 2012 NASA Lunabotic Mining Competition. .

  9. The Southern Cone and Antarctica. Strategies for the 1990’s.

    DTIC Science & Technology

    1986-01-01

    1976), p. 188. • .. . . ° . . . . • . - ~ * *.. N % ~ % *’~*’s -82- 300scar Pinochet de la Barra, Antirtica aho 2000: nuevas perspectivas politicas y...nm EEZ around the Galapagos Islands is extended southward to the Pole according to Julio Tobar Donoso y Alfredo Luna Tobar, Derecho territorial...ecuatoriano (Quito: Artes Grificas Cia., Ltda., 1979), pp. 253-5. That the Tobar y Luna assertion is official policy is confirmed by Mario Ribadeneira

  10. Development of a mast or robotic arm-mounted infrared AOTF spectrometer for surface Moon and Mars probes

    NASA Astrophysics Data System (ADS)

    Korablev, Oleg; Ivanov, Andrey; Fedorova, Anna; Kalinnikov, Yurii K.; Shapkin, Alexei; Mantsevich, Sergey; Viazovetsky, Nikita; Evdokimova, Nadezhda; Kiselev, Alexander V.

    2015-09-01

    We introduce a pencil-beam infrared AOTF spectrometer for context assessment of the surface mineralogy in the vicinity of a planetary probe or a rover analyzing the reflected solar radiation in the near infrared range. One application is the ISEM (Infrared Spectrometer for ExoMars) instrument to be deployed on the mast of ExoMars Rover planned for launch in 2018. A very similar instrument LIS (Lunar Infrared Spectrometer) is planned to be flown on Russian Luna-25 (Luna Globe Lander) and Luna-27 (Luna Resource Lander) missions in 2018 and 2021 respectively. On the lunar landers the instrument will be mounted at a robotic arm (Luna-25) or at a dedicated mast (Luna-27). The instrument covers the spectral range of 1.15-3.3 μm with the spectral resolution of ~25 cm-1 and is intended to study mineralogical and petrographic composition of the uppermost layer of the regolith. Both the Mars and the Moon instruments target waterbearing minerals, phyllosilicates, sulfates, carbonates in the vicinity of the Mars rover, and H2O ice and hydroxyl in the vicinity of lunar lander. The optical scheme includes entry optics, the TeO2 AOTF, and a Peltier-cooled InAs detector. To cover the extended spectral range the AOTF is equipped with two piezotransducers. At present the qualification prototype of the instrument is being characterized. The requirements, instrument optics, and different aspects of its characterization, including low-temperature survival validation is described.

  11. Laparoscopic uterosacral nerve ablation for alleviating chronic pelvic pain: a randomized controlled trial.

    PubMed

    Daniels, Jane; Gray, Richard; Hills, Robert K; Latthe, Pallavi; Buckley, Laura; Gupta, Janesh; Selman, Tara; Adey, Elizabeth; Xiong, Tengbin; Champaneria, Rita; Lilford, Richard; Khan, Khalid S

    2009-09-02

    Chronic pelvic pain is a common condition with a major effect on health-related quality of life, work productivity, and health care use. Operative interruption of nerve trunks in the uterosacral ligaments by laparoscopic uterosacral nerve ablation (LUNA) is a treatment option for patients with chronic pelvic pain. To assess the effectiveness of LUNA in patients with chronic pelvic pain. Randomized controlled trial of 487 women with chronic pelvic pain lasting longer than 6 months without or with minimal endometriosis, adhesions, or pelvic inflammatory disease, who were recruited to the study by consultant gynecological surgeons from 18 UK hospitals between February 1998 and December 2005. Follow-up was conducted by questionnaires mailed at 3 and 6 months and at 1, 2, 3, and 5 years. Bilateral LUNA or laparoscopy without pelvic denervation (no LUNA); participants were blinded to the treatment allocation. The primary outcome was pain, which was assessed by a visual analogue scale. Data concerning the 3 types of pain (noncyclical pain, dysmenorrhea, and dyspareunia) were analyzed separately as was the worst pain level experienced from any of these 3 types of pain. The secondary outcome was health-related quality of life, which was measured using a generic instrument (EuroQoL EQ-5D and EQ-VAS). After a median follow-up of 69 months, there were no significant differences reported on the visual analogue pain scales for the worst pain (mean difference between the LUNA group and the no LUNA group, -0.04 cm [95% confidence interval {CI}, -0.33 to 0.25 cm]; P = .80), noncyclical pain (-0.11 cm [95% CI, -0.50 to 0.29 cm]; P = .60), dysmenorrhea (-0.09 cm [95% CI, -0.49 to 0.30 cm]; P = .60), or dyspareunia (0.18 cm [95% CI, -0.22 to 0.62 cm]; P = .40). No differences were observed between the LUNA group and the no LUNA group for quality of life. Among women with chronic pelvic pain, LUNA did not result in improvements in pain, dysmenorrhea, dyspareunia, or quality of life

  12. The Practice of Research of a Basic Education Teacher Involving Mental Models of the Phases of the Moon and Eclipses. (Spanish Title: La Práctica de Investigación de un Maestro de Educación BÁsica con El Uso de los Modelos Mentales de Las Fases de la Luna Y Eclipses.) A Prática de Pesquisa de um Professor do Ensino Fundamental Envolvendo Modelos Mentais de Fases da Lua e Eclipses

    NASA Astrophysics Data System (ADS)

    Pessôa Queiroz, Glória; Jubitipan Borges de Sousa, Carlos; Auxiliadora Delgado Machado, Maria

    2009-12-01

    The inclusion of basic education teachers in the survey domain is a controversial issue and fully debated in the academy. The opportunity for a collective work that incorporated school teachers from a public school to a university's group of physics teaching at university allowed us to glimpse the redefinition of the function of a science teacher (a coauthor of this paper) by himself, such that now he includes research on the knowledge construction by students in his teacher practice. The formation of inter-institutional groups for action planning and research in these areas has proved productive for the task of knowledge construction to support educational processes in school, while the university enriches its collection of experiences critically validated, and can consider the results in teachers initial and continued education. The active participation of the teacher in a research group at the university led him to reflect on the possible didactical ways to be described, analyzed and communicated to other teachers. The construction of a pedagogy that took into account the mental models of students on the basic topics of astronomy, and the changes developed resulting from the lessons taught, led to far-reaching consequences on the pedagogy adopted by the teacher, who incorporates now a new vision of science and alternative forms to dialogue with students, essential components for a researcher in Science Education. La inclusión de los maestros de la escuela básica en el universo de la investigación es polémica y está en amplio debate en el mundo académico. La oportunidad de trabajo colectivo de los maestros de una escuela pública en Río de Janeiro con un grupo universitario de enseñanza de la física nos ha permitido vislumbrar la redefinición de la función de un maestro de ciencias (uno de los coautores de este documento) por él mismo, ahora para incluir la investigación sobre la construcción del conocimiento por los alumnos en su práctica como docente. La formación de grupos interinstitucionales para la planificación de la acción y la investigación ha resultado productiva para el trabajo de construcción de conocimiento de apoyo a los procesos educativos en la escuela, mientras que la universidad enriquece su colección de experiencias validadas, considerando los resultados de la educación inicial y continua de maestros. La participación activa del maestro en un grupo de investigación en la universidad lo llevó a reflexiones sobre los posibles caminos didácticos que pueden ser descriptos, analizados y comunicados a los demás docentes. La construcción de una pedagogía propia, que tuvo en cuenta los modelos mentales de los estudiantes sobre los temas básicos de astronomía, y los cambios desarrollados a partir de las lecciones que enseñó, trajeron consecuencias de largo alcance sobre la pedagogía adoptada por el maestro, que ahora incorpora una nueva visión de la ciencia y formas alternativas al diálogo con los estudiantes, los componentes esenciales para un investigador en Educaciónen Ciencias. A inclusão do professor da escola básica no universo da pesquisa é questão controvertida e em pleno debate no meio acadêmico. A oportunidade de trabalho coletivo que incorporou professores de uma escola municipal no Rio de Janeiro a um grupo de ensino de Física da universidade nos possibilitou vislumbrar a ressignificação da função de um professor de Ciências (co-autor deste trabalho) por ele próprio, agora passando a incluir a pesquisa sobre a construção de conhecimento pelos alunos em sua prática como docente. A formação de grupos interinstitucionais para o planejamento de ações e de pesquisas tem-se mostrado produtiva para um trabalho de construção de conhecimentos a fim de subsidiar processos educativos na escola, ao mesmo tempo em que a universidade enriquece seu acervo de experiências validadas criticamente, podendo considerar seus resultados na formação inicial e continuada de professores. A participação ativa do professor num grupo de pesquisa na universidade o levou à reflexão sobre caminhos didáticos possíveis de serem descritos, analisados e comunicados a outros professores. A construção de uma pedagogia própria, levando em conta os modelos mentais dos alunos sobre temas básicos de Astronomia, e as mudanças promovidas a partir das aulas dadas, trouxeram amplas conseqüências sobre a pedagogia adotada pelo professor. Hoje a prática desse professor incorpora uma nova visão de ciência e formas alternativas de dialogar com os alunos, elementos indispensáveis a um pesquisador em Educação em Ciências.

  13. Oil exploration in carbonated sediments

    SciTech Connect

    Acevedo, J.S.

    1980-06-01

    This report gives a detailed description of the oil and gas fields of Chiapas-Tabasco in south Mexico. A history of the discovery of these Mesozoic reservoirs as well as the basic factors taken into account in order to explore and develop these important fields are presented. The stratigraphic column of these pools is shown and explained according to information gathered by superficial geology, gravimetry, and well drilling as well as from data obtained from seismology.

  14. Spicy meal disturbs sleep: an effect of thermoregulation?

    PubMed

    Edwards, S J; Montgomery, I M; Colquhoun, E Q; Jordan, J E; Clark, M G

    1992-09-01

    Tabasco sauce and mustard taken with the evening meal markedly disturbed sleep of six, young, healthy male subjects; reducing slow wave and stage 2 sleep, increasing total time awake and tending to increase sleep onset latency. Whilst post meal effects on temperature and oxygen consumption were not significantly different from control meals the spicy food condition elevated body temperature during the first sleep cycle. The possibility that the spice principle capsaicin affects sleep via changes in body temperature is discussed.

  15. [Individual psychotherapy. Institutional psychotherapy: theoretical-practical aspect].

    PubMed

    Cruz Arceo, B

    1977-01-01

    The author describes his experience in institutional psychotherapy, at the Clínica Hospital of Villahermosa, Tabasco. He mentions factors in the patient, in the psychiatrist, in the institution and in the culture, as fostering the success or the failure of institutional psychotherapy. He shows the effectiveness of this type of treatment in this enviroment and describes ways of improving this kind of work.

  16. Giant fields in the southeast of Mexico

    SciTech Connect

    Acevedo, J.S.; Dautt, O.M.

    1980-01-01

    From a geologic and petroliferous point of view, the southeast zone coastal plain of Mexico has been divided into the saline basin of the Isthmus, the Macuspana Basin, and the Chiapas-Tabasco Mesozoic area. In the first 2 basins, there are giant producer fields from tertiary sands. In the saline basin of the Isthmus, production comes from structural traps associated with saline domes. In the Macuspana Basin, production comes from anticlines. The Chiapas-Tabasco Mesozoic area produces from Jurassic, Lower, Middle and Upper Cretaceous dolomitic limestones and dolomites associated with anticlines. The marine platform of Campeche produces from Jurassic and Cretaceous dolomites and lower Paleocene dolomitic Breccias associated with anticlines having numerous normal and thrust faults. A brief description is given of 5 giant fields in the saline basin of the Isthmus and 3 fields in the Macuspana Basin; a more detailed description is given of 4 giant fields in the Chiapas-Tabasco area and 2 in the sound of Campeche.

  17. Artificial wetlands performance: nitrogen removal.

    PubMed

    Durán-de-Bazúa, Carmen; Guido-Zárate, Alejandro; Huanosta, Thalía; Padrón-López, Rosa Martha; Rodríguez-Monroy, Jesús

    2008-01-01

    Artificial wetlands (AW) are a promising option for wastewater treatment in small communities due to their high performance in nutrients removal and low operation and maintenance costs. Nitrogen can favour the growth of algae in water bodies causing eutrophication when present at high concentrations. Nitrogen can be removed through different mechanisms (e.g. nitrification-denitrification, adsorption and plant uptake). Environmental conditions such as temperature and relative humidity can play an important role in the performance of these systems by promoting the growth of macrophytes such as reeds and cattails (e.g. Phragmites australis, Typha latifolia respectively). In this paper, two AW systems were compared, one located in Mexico City, Mexico at an altitude higher than 2,000 m above the sea level, and the second one located in Villahermosa, Tabasco, Mexico at an a altitude near the sea level (27 m). Both systems comprised five reactors (147-L plastic boxes) filled with volcanic slag and gravel and intermittently fed with synthetic water. The removal nitrogen efficiency found for the system located in Mexico City was higher than that of the Tabasco system (90 and 80% as TKN respectively). The higher temperatures in the Tabasco system did not enhanced the nitrogen removal as expected.

  18. CASPAR - Nuclear Astrophysics Underground

    NASA Astrophysics Data System (ADS)

    Strieder, Frank; Robertson, Daniel; Couder, Manoel; Greife, Uwe; Wells, Doug; Wiescher, Michael

    2015-10-01

    The work of the LUNA Collaboration at the Laboratori Nationali del Gran Sasso demonstrated the research potential of an underground accelerator for the field of nuclear astrophysics. Several key reactions could be studied at LUNA, some directly at the Gamow peak for solar hydrogen burning. The CASPAR (Compact Accelerator System for Performing Astrophysical Research) Collaboration will implement a high intensity 1 MV accelerator at the Sanford Underground Research Facility (SURF) and overcome the current limitation at LUNA. The installation of the accelerator in the recently rehabilitated underground cavity at SURF started in Summer 2015 and first beam should be delivered by the end of the year. This project will primarily focus on the neutron sources for the s-process, e.g. 13C(α , n) 16O and 22Ne(α , n) 25Mg , and lead to unprecedented measurements compared to previous studies. A detailed overview of the science goals of CASPAR will be presented.

  19. Microcrater and solar-flare track maturation of the lunar regolith

    NASA Technical Reports Server (NTRS)

    Poupeau, G.; Michel-Levy, M. C.; Mandeville, J. C.; Johnson, J.; Romary, P.

    1978-01-01

    The microcrater, pancake and cosmic ray track record in the 100-200 microns feldspar fraction of a variety of surface soils and Apollo and Luna 16-24 cores have been studied. In Luna 24, a study of the glassy agglutinates plus breccias in 9 levels revealed this core was deposited as discrete layers, most of which are immature. Luna 16 and 20 cores were found respectively mature and immature. Glassy agglutinates and impact microcraters, absent to rare in immature soils such as 12033 and 14141, are present in similar abundances on crystals from submature to mature soils. In submature and mature soils, pancakes are present on 60 to 100 percent of crystals and craters on 50 to 70 percent. Microcrater, track and solar wind gas data suggest feldspar crystals in the size range considered reach an equilibrium maturity grade faster than bulk soils. This is interpreted as due to the limited lifetime of these crystals in the lunar regolith.

  20. Regional stratigraphy and geologic history of Mare Crisium

    NASA Technical Reports Server (NTRS)

    Head, J. W., III; Adams, J. B.; Mccord, T. B.; Pieters, C.; Zisk, S.

    1978-01-01

    Remote sensing and Luna 24 sample data are used to develop a summary of the regional stratigraphy and geologic history of Mare Crisium. Laboratory spectra of Luna 24 samples, telescopic reflectance spectra in the 0.3 to 1.1 micron range and orbital X-ray data have identified three major basalt groups in the region. Group I soil is derived from iron- and magnesium-rich titaniferous basalts and was apparently emplaced over the majority of the basin, however is presently exposed as a shelf in the southwest part. Group II soils, derived from very low titanium ferrobasalts, were emplaced in two stages subsequent to Group I emplacement and now appear as part of the outer shelf and topographic annulus. Subsidence of the basin interior preceded and continued after the emplacement of the third basalt group, a soil derived from a low titanium ferrobasalt. The Luna 24 site is found to be within a patch of Group II material.

  1. Rb-Sr age and content of potassium, rubidium strontium, barium, and rare earths in surface material from the Sea of Fertility

    NASA Technical Reports Server (NTRS)

    Allegre, C. J.; Birck, J. L.; Loubet, M.; Provost, A.

    1974-01-01

    The Luna 16 automatic station returned from the Sea of Fertility a 35 cm long column of lunar surface material. 1 g of the Luna 16 lunar surface material, taken at a depth of 22 cm, consists of fine material: surface material and fine fragments of rocks from 1 to 4 mm in diameter. Analyses made on 17 mg of the fine lunar surface material are presented. The results obtained for the Luna 16 surface material are plotted on the diagram of the isotopic evolution of strontium and show that this surface material is most depleted of radiogenic Sr-87 of all the known lunar surface materials and that the point characterizing Lunar 16 lies somewhat to the right of the line corresponding to an age of 4.6 billion years.

  2. Rb-Sr age and content of potassium, rubidium strontium, barium, and rare earths in surface material from the Sea of Fertility

    NASA Technical Reports Server (NTRS)

    Allegre, C. J.; Birck, J. L.; Loubet, M.; Provost, A.

    1974-01-01

    The Luna 16 automatic station returned from the Sea of Fertility a 35 cm long column of lunar surface material. 1 g of the Luna 16 lunar surface material, taken at a depth of 22 cm, consists of fine material: surface material and fine fragments of rocks from 1 to 4 mm in diameter. Analyses made on 17 mg of the fine lunar surface material are presented. The results obtained for the Luna 16 surface material are plotted on the diagram of the isotopic evolution of strontium and show that this surface material is most depleted of radiogenic Sr-87 of all the known lunar surface materials and that the point characterizing Lunar 16 lies somewhat to the right of the line corresponding to an age of 4.6 billion years.

  3. Infrared transmission spectra of Sea of Fertility regolith

    NASA Technical Reports Server (NTRS)

    Akhmanova, M. V.; Karyakin, A. V.; Tartasov, L. S.

    1974-01-01

    Transmission spectra in the 2-25 micrometer region were obtained for samples of lunar regolith returned by the Luna 16 automatic station. A comparison of the Luna 16, Apollo 11, and Apollo 12 samples showed that the infrared transmission spectra of regolith samples from the mare regions are similar and characteristic of basic basaltic rocks. The absorption bands show up in the vibration region of the SiO4 groups. No water and OH groups were found in the samples based on the spectrum. Spectra of regolith samples calcined at 1000C showed changes that can be interpreted as changes in the spectra of irradiated crystals (especially distinctly for the Luna 16 samples).

  4. Ground-based measurements with the ADRON active gamma-ray and neutron spectrometer designed for lunar and Martian landing missions

    NASA Astrophysics Data System (ADS)

    Litvak, M. L.; Golovin, D. V.; Kolesnikov, A. B.; Vostrukhin, A. A.; Djachkova, M. V.; Kozyrev, A. S.; Mitrofanov, I. G.; Mokrousov, M. I.; Sanin, A. B.

    2017-05-01

    This paper outlines the main research objectives and gives a description of the ADRON active gamma-ray and neutron spectrometer, which is designed specifically for the Russian lunar landing missions Luna-Glob and Luna-Resurs and for the ExoMars Martian landing platform. The measurement technique is described. The first ground-based calibration results are presented, making it possible to assess the sensitivity of the ADRON instruments in determining the average water content of the underlying surface in the range from 1% (dry ground) to 100% (water ice) to a depth of 0.5 m.

  5. Radiation Evaluation of an Advanced 64Mb 3.3V DRAM and Insights into the Effects of Scaling on Radiation Hardness

    NASA Technical Reports Server (NTRS)

    Shaw, D. C.; Swift, G. M.; Johnston, A. H.

    1995-01-01

    In this paper, total ionizing dose radiation evaluations of the Micron 64 Mb 3.3 V, fast page mode DRAM and the IBM LUNA-ES 16 Mb DRAM are presented. The effects of scaling on total ionizing dose radiation hardness are studied utilizing test structures and a series of 16 Mb DRAMs with different feature sizes from the same manufacturing line. General agreement was found between the threshold voltage shifts of 16 Mb DRAM test structures and the threshold voltage measured on complete circuits using retention time measurements. Retention time measurement data from early radiation doses are shown that allow internal failure modes to be distinguished.

  6. Dating samples of lunar soil from the Mare Crisium by the Ar/39/-Ar/40/ technique

    NASA Astrophysics Data System (ADS)

    Shanin, L. L.; Arakeliants, M. M.; Bogatikov, O. A.; Ivanenko, V. V.; Pupyrev, Iu. G.; Tarasov, L. S.; Frikh-Khar, D. I.

    1981-07-01

    Two samples (dolerite and gabbro fragments) from a depth of 184 cm in the Luna 24 core are dated using the Ar(39)-Ar(40) technique. The values obtained are found to be lower than all published isotopic ages for the Luna 24 samples. An analysis of possible dating errors of the lunar samples, together with the good agreement of the results from the Ar(39)-Ar(40) technique of geochronologic standards and anorthosite from the Korosten pluton with the results from Rb-Sr, U-Pb, and Sm-Nd methods, attests the reliability of the values.

  7. Radiation Evaluation of an Advanced 64Mb 3.3V DRAM and Insights into the Effects of Scaling on Radiation Hardness

    NASA Technical Reports Server (NTRS)

    Shaw, D. C.; Swift, G. M.; Johnston, A. H.

    1995-01-01

    In this paper, total ionizing dose radiation evaluations of the Micron 64 Mb 3.3 V, fast page mode DRAM and the IBM LUNA-ES 16 Mb DRAM are presented. The effects of scaling on total ionizing dose radiation hardness are studied utilizing test structures and a series of 16 Mb DRAMs with different feature sizes from the same manufacturing line. General agreement was found between the threshold voltage shifts of 16 Mb DRAM test structures and the threshold voltage measured on complete circuits using retention time measurements. Retention time measurement data from early radiation doses are shown that allow internal failure modes to be distinguished.

  8. A Receiver-Initiated Collision-Avoidance Protocol for Multi-Channel Networks

    DTIC Science & Technology

    2001-01-01

    cess) was first proposed by Kleinrock and Tobagi [17], includ- ing MACA [14], MACAW [2], IEEE 802.11 [1], and FAMA [4]. Fullmer and Garcia-Luna-Aceves [4...and Physical Layer (PHY) Specifications. IEEE, July 1996. [2] V. Bharghavan, A. Demers, S. Shenker, and L. Zhang. MACAW : A Media Access Protocol for

  9. Inert gases in a terra sample - Measurements in six grain-size fractions and two single particles from Lunar 20.

    NASA Technical Reports Server (NTRS)

    Heymann, D.; Lakatos, S.; Walton, J. R.

    1973-01-01

    Review of the results of inert gas measurements performed on six grain-size fractions and two single particles from four samples of Luna 20 material. Presented and discussed data include the inert gas contents, element and isotope systematics, radiation ages, and Ar-36/Ar-40 systematics.

  10. 77 FR 11617 - Jetronic Industries, Inc. (n/k/a New Bastion Development, Inc.), JMAR Technologies, Inc...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-02-27

    ... COMMISSION Jetronic Industries, Inc. (n/k/a New Bastion Development, Inc.), JMAR Technologies, Inc., Kolorfusion International, Inc. Legalopinion.com (n/k/a Drayton Richdale Corp.), Lifestream Technologies, Inc., Lions Petroleum, Inc., (n/k/a China Hongxing Agritech, Inc.), Luna Technologies International,...

  11. 75 FR 47863 - Self-Regulatory Organizations; Financial Industry Regulatory Authority, Inc.; Notice of Filing of...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-08-09

    ... Financial Corp., dated December 30, 2008 (``GBS''); letter from Goodwin Browning & Luna Securities, dated December 30, 2008 (``Goodwin''); letter from OmniCap, LLC, dated December 30, 2008 (``OmniCap''); letter... (``State Farm''). \\11\\ Askar, GBS, Goodwin, Lafferty, OmniCap, Pointe and Telesis support NAIBD's comments...

  12. Pyroxenes as recorders of lunar basalt petrogenesis - Chemical trends due to crystal-liquid interaction.

    NASA Technical Reports Server (NTRS)

    Bence, A. E.; Papike, J. J.

    1972-01-01

    Review of the crystallization histories suggested by the chemical, crystallographic, morphological, and paragenetic relationships observed in pyroxenes from basalts collected on the Apollo 11, 12, 14, 15, and Luna 16 missions. Although the final stages of lunar basalt crystallization appear to be rapid near-surface events, the initial stages are shown to vary considerably among the different basalt types.

  13. Soaring through the Universe. Astronomy through Children's Literature.

    ERIC Educational Resources Information Center

    Letwinch, Joanne C.

    This publication is a guide to teaching astronomy through the use of mythology and its literature in grades 3-6. The book is divided into the following seven sections: "Introduction"; Chapter 1: "Luna: the Moon"; Chapter 2: "Del Sol: the Sun"; Chapter 3: "The Planets"; Chapter 4: "Star Bright, Star Light"; Chapter 5: "Traveling through Space"; and…

  14. Investigation of the volatile species in the lunar soil

    NASA Astrophysics Data System (ADS)

    Wurz, Peter; Hofer, Lukas; Tulej, Marek; Lasi, Davide; Cabane, Michel; Cosica, David; Gerasimov, Mikhail; Rodinov, Daniel

    2013-04-01

    Two spacecraft, Luna-Glob and Luna-Resource of Roskosmos (Russia), will be landing on the lunar south pole in 2016 and 2018, respectively. These spacecraft will carry a complex scientific payload. Part of the scientific instrumentation is the gas-chromatographic mass-spectrometric complex, which combines a Thermal Differential Analyser (TDA), a Gas Chromatograph (GC), and a mass spectrometer (MS). This instrument is dedicated to the investigation of the volatiles in the lunar soil, its chemical composition, the fraction of water and organic species, and the identification of noble gases. Measurement of isotopic composition will be performed of CHON elements (13C/12C, D/H, 17O/16O, 18O/16O, 15N/14N) and noble gases. We developed a prototype GC-MS instrument for these missions where the GC part is heritage from the Phobos Grunt mission of Roskosmos and the MS part is a complete new development for the Luna missions. We have carried out several GC-MS measurements on calibration gas mixtures that demonstrate that this instrument fulfills the scientific requirements for the Luna missions.

  15. Moth tails divert bat attack: evolution of acoustic deflection.

    PubMed

    Barber, Jesse R; Leavell, Brian C; Keener, Adam L; Breinholt, Jesse W; Chadwell, Brad A; McClure, Christopher J W; Hill, Geena M; Kawahara, Akito Y

    2015-03-03

    Adaptations to divert the attacks of visually guided predators have evolved repeatedly in animals. Using high-speed infrared videography, we show that luna moths (Actias luna) generate an acoustic diversion with spinning hindwing tails to deflect echolocating bat attacks away from their body and toward these nonessential appendages. We pit luna moths against big brown bats (Eptesicus fuscus) and demonstrate a survival advantage of ∼ 47% for moths with tails versus those that had their tails removed. The benefit of hindwing tails is equivalent to the advantage conferred to moths by bat-detecting ears. Moth tails lured bat attacks to these wing regions during 55% of interactions between bats and intact luna moths. We analyzed flight kinematics of moths with and without hindwing tails and suggest that tails have a minimal role in flight performance. Using a robust phylogeny, we find that long spatulate tails have independently evolved four times in saturniid moths, further supporting the selective advantage of this anti-bat strategy. Diversionary tactics are perhaps more common than appreciated in predator-prey interactions. Our finding suggests that focusing on the sensory ecologies of key predators will reveal such countermeasures in prey.

  16. Study of friction properties of lunar surface material and its analogs

    NASA Technical Reports Server (NTRS)

    Dukhovskoy, Y. A.; Motovilov, E. A.; Silin, A. A.; Smorodinov, M. I.; Shvarev, V. V.

    1974-01-01

    A description is given of instruments for determining the friction properties of the surficial layer of lunar surface material returned by the Luna 16 automatic lunar station, as well as the friction properties of its analogs: andesite-basaltic sand and basalts. The experimental method and results are presented.

  17. Reception and study of lunar surface material in inert gas medium. [considering laboratory vacuum receiving chamber

    NASA Technical Reports Server (NTRS)

    Surkov, Y. A.; Rudnitskiy, Y. M.; Glotov, V. A.

    1974-01-01

    The reception and study of lunar material returned by the Luna 16 space station is described. The layout of a vacuum receiving chamber for working with material in a helium atmosphere is examined along with the main operations involved in extracting the material from the ampule and drill.

  18. Further notes on New Zealand Enantiobuninae (Opiliones, Neopilionidae), with the description of a new genus and two new species

    PubMed Central

    Taylor, Christopher K.

    2013-01-01

    Abstract Mangatangi parvum gen. n. and sp. and Forsteropsalis pureroa sp. n. are described from the North Island of New Zealand. Pantopsalis listeri (White 1849) and Pantopsalis cheliferoides (Colenso 1882) are redescribed and no longer regarded as nomina dubia; Pantopsalis luna (Forster 1944) is identified as a junior synonym of Pantopsalis listeri. A key to Pantopsalis species is provided. PMID:23653517

  19. Wrinkle Ridges and Young Fresh Crater

    NASA Image and Video Library

    2002-06-04

    This NASA Mars Odyssey image is of the ridged plains of Lunae Planum in the northern hemisphere of Mars. Wrinkle ridges, a very common landform on Mars, Mercury, Venus, and the Moon, are found mostly along the eastern side of the image.

  20. Establishment of Rio Grande cottonwood seedlings using micro-irrigation of xeric flood plain sites

    Treesearch

    David R. Dreesen; Gregory A. Fenchel; Joseph G. Fraser

    1999-01-01

    Flood control, irrigation structures, and flow control practices on the Middle Rio Grande have prevented the deposition of sediments and hydrologic conditions conducive to the germination and establishment of Rio Grande cottonwood (Populus fremontii S. Wats.). The Los Lunas Plant Materials Center has been investigating the use of micro-irrigation systems on xeric flood...

  1. 78 FR 28701 - Unblocking of Specially Designated Nationals and Blocked Persons Pursuant to Executive Order 12978

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-15

    ... Nicolas), c/o DEPOSITO POPULAR DE DROGAS S.A., Cali, Colombia; c/ o DISTRIBUIDORA DE DROGAS CONDOR LTDA...) . 3. CUECA VILLARAGA, Hernan, c/o DROGAS LA REBAJA BOGOTA S.A., Bogota, Colombia; Cedula No. 11352426... (Colombia) (individual) . 6. FERNANDEZ LUNA, Tiberio, c/o DISTRIBUIDORA DE DROGAS CONDOR S.A., Bogota...

  2. Il Calcolo della Pasqua: Vittorio d'Aquitania Dionigi il Piccolo e Abbone di Fleury

    NASA Astrophysics Data System (ADS)

    Sigismondi, Costantino

    2014-05-01

    The Easter calculus is a story of ephemerides approximations, with appropriate algorithms, as well as the reformations of the calendar dealed with tropical year's approximations. The calculus made by Victorius of Aquitania, Dyonisius Exiguus and Abbo of Fleury, based on 532 years Easter period in Julian calendar are discussed, including the corrections ad hoc of the algorithms, like the saltus lunae.

  3. Object Tracking Through Adaptive Correlation

    DTIC Science & Technology

    1992-12-17

    mtring. "-I %f -v 1". sluc~an); streat(bin..sl. string); strcpy~ bizn ..tl. *vtbresb -1 /’cup/trac/tespi.viff ) strcat(bia..tl. ý-o /tup/rac/bin..4and..ti...Developmental Planning until entering the Air Force Institute of Technology in May 1991. Permanent address: 5141 La Luna Drive La Palma, California

  4. Echus Chasma

    NASA Image and Video Library

    2012-01-23

    Echus Chasma forms the boundary between the Tharsis volcanoes to the west and Lunae Planum to the east. This region is both tectonically fractured rocks top and volcanic flows middle and bottom. This image is from NASA 2001 Mars Odyssey spacecraft.

  5. Echus Chasma

    NASA Image and Video Library

    2011-05-25

    Between the Tharsis region and Lunae Planum lies Echus Chasma and the source of Kasei Vallis. Flows from the Tharsis volcanoes are buckled by tectonic forces forming mounds and fractures in the Chasma as seen in this image from NASA 2001 Mars Odyssey.

  6. Corporate Philanthropy, College Students, and The LUNAFEST[R] Film Festival

    ERIC Educational Resources Information Center

    Hankin, Kelly

    2011-01-01

    In 2001, Clif Bar & Company, makers of LUNA: The Whole Nutrition Bar for Women, debuted LUNAFEST[R], an international touring film festival that showcases short narrative and documentary work of female filmmakers and raises money for the Breast Cancer Fund and other nonprofit women's organizations. A pre-packaged film festival with clear and easy…

  7. Neutron activation study of the composition of lunar surface material from the Sea of Fertility

    NASA Technical Reports Server (NTRS)

    Surkov, Y. A.; Kirnozov, F. F.; Ivanov, I. N.; Kilesov, G. M.; Ryvkin, B. N.; Shpanov, A. P.

    1974-01-01

    The elemental composition of samples of lunar regolith returned by Luna 16 from the Sea of Fertility was determined by a radio activation method using generator and reactor neutrons, and also by gamma spectrometry with scintillation and Ge(Li) detectors.

  8. Moth tails divert bat attack: Evolution of acoustic deflection

    PubMed Central

    Barber, Jesse R.; Leavell, Brian C.; Keener, Adam L.; Breinholt, Jesse W.; Chadwell, Brad A.; McClure, Christopher J. W.; Hill, Geena M.; Kawahara, Akito Y.

    2015-01-01

    Adaptations to divert the attacks of visually guided predators have evolved repeatedly in animals. Using high-speed infrared videography, we show that luna moths (Actias luna) generate an acoustic diversion with spinning hindwing tails to deflect echolocating bat attacks away from their body and toward these nonessential appendages. We pit luna moths against big brown bats (Eptesicus fuscus) and demonstrate a survival advantage of ∼47% for moths with tails versus those that had their tails removed. The benefit of hindwing tails is equivalent to the advantage conferred to moths by bat-detecting ears. Moth tails lured bat attacks to these wing regions during 55% of interactions between bats and intact luna moths. We analyzed flight kinematics of moths with and without hindwing tails and suggest that tails have a minimal role in flight performance. Using a robust phylogeny, we find that long spatulate tails have independently evolved four times in saturniid moths, further supporting the selective advantage of this anti-bat strategy. Diversionary tactics are perhaps more common than appreciated in predator–prey interactions. Our finding suggests that focusing on the sensory ecologies of key predators will reveal such countermeasures in prey. PMID:25730869

  9. TechEdSat 5 PhoneSat 5 Team Photo

    NASA Image and Video Library

    2016-07-28

    TechEdSat 5 PhoneSat 5 Team photo on July 26, 2016. Taken in fron of the 1/3 scale Shuttle Orbiter Model, in front of the Parade Ground on Clark Road at NASA Research Park. Mark Murbach Sarosh Hussain Ali Guarneros Luna David Handy Jonathan Hanson Jakqueline Granillo Sarah Chu Alejandro Sales

  10. Evidence for a high-magnesium subsurface basalt in Mare Crisium from orbital X-ray fluorescence data

    NASA Technical Reports Server (NTRS)

    Andre, C. G.; Adler, I.; Wolfe, R. W.

    1978-01-01

    Orbital X-ray fluorescence data taken by the Apollo 15 mission over Mare Crisium are analyzed in order to detect surface occurrences of the magnesium-rich materials found in the Luna 24 core sample. Apollo 15 data of the surface soils of the Luna 24 landing site, expressed as Al/Si and Mg/Si ratios, are found to be well correlated with the composition of the less than 74 micron fraction of the core sample. Orbital data indicate that most surface areas of the southern part of Mare Crisium have magnesium contents lower than or equal to that of the landing site, with the exception of areas in the vicinities of the post-mare craters Picard and Pierce and an area northeast of the Luna 24 site. The crater material is interpreted to be a magnesium-rich subsurface basalt excavated by crater formation, which may represent the material from which magnesium-rich Luna 24 samples, including olivine gabbro and olivine vitrophyre, were derived.

  11. Buried Impact Basins as Constraints on the Thickness of Ridged Plains and Northern Lowland Plains on Mars

    NASA Technical Reports Server (NTRS)

    Frey, H. V.; Roark, J. H.; Hohner, G. J.; Wernecke, A.; Sakimoto, S. E. H.

    2002-01-01

    The northern lowland plains average 1-2 km but locally vary from less than 0.5 to likely over 5 km in thickness. In Lunae Planum the total thickness of materials overlying likely present but not detectable 100 to 200 km wide craters is 2-3 km. Additional information is contained in the original extended abstract.

  12. View of crater Tsiolkovsky taken from Apollo 8 spacecraft

    NASA Technical Reports Server (NTRS)

    1968-01-01

    This is a view of the large crater Tsiolkovsky as photographed by the astronauts during the Apollo 8 lunar orbit mission, looking east toward the lunar horizon. Tsiolkovsky is approximately 150 statute miles in diameter. It was first identified and named by the Russians from photographs taken by their unmanned Luna III spacecraft.

  13. Evolution of the moon: The 1974 model

    NASA Technical Reports Server (NTRS)

    Schmitt, H. H.

    1974-01-01

    Investigations are reported of Apollo and Luna explorations which have brought about the understanding of the moon and its structure. It is shown that with this knowledge of the moon, a better understanding is presented of the earth's origin, structure and composition.

  14. 7 CFR 613.5 - PMCs.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 7 Agriculture 6 2010-01-01 2010-01-01 false PMCs. 613.5 Section 613.5 Agriculture Regulations of... AGRICULTURE CONSERVATION OPERATIONS PLANT MATERIALS CENTERS § 613.5 PMCs. (a) The Norman A. Berg National PMC..., Elsberry, MO, Bridger, MT, Fallon, NV, Cape May Courthouse, NJ, Los Lunas, NM, Big Flats, NY, Bismarck,...

  15. Corporate Philanthropy, College Students, and The LUNAFEST[R] Film Festival

    ERIC Educational Resources Information Center

    Hankin, Kelly

    2011-01-01

    In 2001, Clif Bar & Company, makers of LUNA: The Whole Nutrition Bar for Women, debuted LUNAFEST[R], an international touring film festival that showcases short narrative and documentary work of female filmmakers and raises money for the Breast Cancer Fund and other nonprofit women's organizations. A pre-packaged film festival with clear and easy…

  16. Report & Evaluations on Opportunities Conference (Albuquerque Indian School, New Mexico, January 19, 1978).

    ERIC Educational Resources Information Center

    Toledo, Eulynda

    The conference was attended by 53 high school seniors and 65 parents, teachers, administrators, and counselors from Albuquerque Public Schools, Los Lunas, Bernalillo, Jemez, Grants, and Albuquerque Indian School. After an opening address and two speakers, participants attended three workshops. In the first workshop, a panel of students presented…

  17. U-Th-Pb analyses of soil from the Sea of Fertility.

    NASA Technical Reports Server (NTRS)

    Tera, F.; Wasserburg, G. J.

    1972-01-01

    Analyses have been made of lead, uranium, and thorium in two soil samples from the Luna 16 mission. Lead was found to be distinctly radiogenic, but significantly less radiogenic than other lunar soils. The Th/U ratio was found to be 3.8, and the uranium concentration was the lowest so far found for lunar soils.

  18. Study of sample of Sea of Fertility lunar surface material by the track method

    NASA Technical Reports Server (NTRS)

    Poupeau, G.; Chatrit, G. C.; Pellas, P.

    1974-01-01

    Tracks in crystals of feldspars, olivines, pyroxenes, and in several fragments of basalts from a sample of Luna 16 lunar surface material were studied. A high track density, exceeding 10 to the 8th power cm/2 was found. The tracks were produced mainly by iron group nuclei of cosmic galactic and solar rays.

  19. Apollo 13 emblem

    NASA Technical Reports Server (NTRS)

    1969-01-01

    This is the insignia of the Apollo 13 lunar landing mission. Represented in the Apollo 13 emblem is Apollo, the sun god of Greek mythology, symbolizing how the Apollo flights have extended the light of knowledge to all mankind. The Latin phrase Ex Luna, Scientia means 'From the Moon, Knowledge'.

  20. Teaching a Cognitive Behavioral Strategy to Manage Emotions Rational Emotive Behavior Therapy in an Educational Setting

    ERIC Educational Resources Information Center

    Banks, Tachelle; Zionts, Paul

    2009-01-01

    The academic and social challenges facing public schools are enormous. For example, the pressure to meet the demands of the current high-stakes testing environment and reach adequate yearly progress (AYP) goals has arguably never been greater (Luna & Turner, 2001; Sanders, 2003). The energy devoted to academics has supplanted the little time spent…

  1. 27 CFR 9.119 - Middle Rio Grande Valley.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 1972. (13) Los Griegos, N. Mex. (1960), revised 1967 and 1972. (14) Los Lunas, N. Mex. (1952), revised... until it reaches the power transmission line towers at Sec. 3/4, T10N, R2E of the Los Griegos, N. Mex....

  2. Apollo 13 emblem

    NASA Technical Reports Server (NTRS)

    1969-01-01

    This is the insignia of the Apollo 13 lunar landing mission. Represented in the Apollo 13 emblem is Apollo, the sun god of Greek mythology, symbolizing how the Apollo flights have extended the light of knowledge to all mankind. The Latin phrase Ex Luna, Scientia means 'From the Moon, Knowledge'.

  3. Southeast Asia Report.

    DTIC Science & Technology

    1984-10-11

    Zambales and Eduardo Joson of Nueva Ecija, that U.S. Subic authorities are prohibiting Filipino employees from speaking Filipino. Diaz, in his...belonging to the 42nd infantry batallion of the Philippine Army. —Agustin Arceo, who was killed on May 21, 1983 in Barangay Malaya, General Luna

  4. A Masterpiece of Counterguerrilla Warfare: BG J. Franklin Bell in the Philippines, 1901-1902

    DTIC Science & Technology

    2007-01-01

    into Morong, Bulacan, or Nueva Ecija [provinces], or south- eastward into General Grant’s brigade. I am practically sure they can not remain here...horseback, and while riding through San Juan de Boc Boc met Luis Luna , Malvar’s adjutant- general, coming in to see the commanding officer about

  5. Evidence for a high-magnesium subsurface basalt in Mare Crisium from orbital X-ray fluorescence data

    NASA Technical Reports Server (NTRS)

    Andre, C. G.; Adler, I.; Wolfe, R. W.

    1978-01-01

    Orbital X-ray fluorescence data taken by the Apollo 15 mission over Mare Crisium are analyzed in order to detect surface occurrences of the magnesium-rich materials found in the Luna 24 core sample. Apollo 15 data of the surface soils of the Luna 24 landing site, expressed as Al/Si and Mg/Si ratios, are found to be well correlated with the composition of the less than 74 micron fraction of the core sample. Orbital data indicate that most surface areas of the southern part of Mare Crisium have magnesium contents lower than or equal to that of the landing site, with the exception of areas in the vicinities of the post-mare craters Picard and Pierce and an area northeast of the Luna 24 site. The crater material is interpreted to be a magnesium-rich subsurface basalt excavated by crater formation, which may represent the material from which magnesium-rich Luna 24 samples, including olivine gabbro and olivine vitrophyre, were derived.

  6. Report & Evaluations on Opportunities Conference (Albuquerque Indian School, New Mexico, January 19, 1978).

    ERIC Educational Resources Information Center

    Toledo, Eulynda

    The conference was attended by 53 high school seniors and 65 parents, teachers, administrators, and counselors from Albuquerque Public Schools, Los Lunas, Bernalillo, Jemez, Grants, and Albuquerque Indian School. After an opening address and two speakers, participants attended three workshops. In the first workshop, a panel of students presented…

  7. Safe and Secure Schools Assessment. Public School Information. Legislative Report, 2008

    ERIC Educational Resources Information Center

    Idaho State Department of Education, 2008

    2008-01-01

    As a result of high profile shootings and critical incidents in schools on a national level, combined with the lack of a cohesive, standardized approach to safety and security in Idaho Schools, Superintendent Tom Luna requested an appropriation to address this issue and the Legislature allocated 5150.000 in FY 2008 for the Safe and Secure…

  8. Indio and Hispano Child: Improving His Self Image.

    ERIC Educational Resources Information Center

    Gallegos, Katherine Powers, Ed.

    Prepared under a Title IV Civil Rights program grant, this document consists of social studies units for grades 1 and 4, suggestions for a culturally oriented arts program, biographical sketches of cultural models, and brief historical sketches of communities in the area of Los Lunas, New Mexico. The purpose of the units of instruction and related…

  9. Creating Community through Mentoring

    ERIC Educational Resources Information Center

    Erickson, Deborah E.; Travick-Jackson, Cecelia

    2006-01-01

    This research studies a doctoral program that includes a cohort component. Candidates engage in active learning and in the skill of mentoring. Research on peer mentoring has shown to support graduate students as they progress in their study (Luna & Cullen, 1998). Analysis of the data found themes relating to mentoring and community: candidates…

  10. Teaching a Cognitive Behavioral Strategy to Manage Emotions Rational Emotive Behavior Therapy in an Educational Setting

    ERIC Educational Resources Information Center

    Banks, Tachelle; Zionts, Paul

    2009-01-01

    The academic and social challenges facing public schools are enormous. For example, the pressure to meet the demands of the current high-stakes testing environment and reach adequate yearly progress (AYP) goals has arguably never been greater (Luna & Turner, 2001; Sanders, 2003). The energy devoted to academics has supplanted the little time spent…

  11. Soaring through the Universe. Astronomy through Children's Literature.

    ERIC Educational Resources Information Center

    Letwinch, Joanne C.

    This publication is a guide to teaching astronomy through the use of mythology and its literature in grades 3-6. The book is divided into the following seven sections: "Introduction"; Chapter 1: "Luna: the Moon"; Chapter 2: "Del Sol: the Sun"; Chapter 3: "The Planets"; Chapter 4: "Star Bright, Star Light"; Chapter 5: "Traveling through Space"; and…

  12. Linking Student Retention Model with Institutional Planning: The Benefits and Limitations of a Student Matrix Model.

    ERIC Educational Resources Information Center

    Schartman, Laura; Rhee, Byung-Shik

    This study explored the possibility of linking the Luna (1999) student flow matrix model with institutional planning at a comprehensive state institution, investigating how student flow environments were associated with student characteristics such as race, gender, citizenship, class level, entry type, and cumulative grade point average. The study…

  13. Survey of Political Participation, Employment, and Demographic Characteristics of Eleven Counties in Southern New Mexico. Volume II.

    ERIC Educational Resources Information Center

    New Mexico State Advisory Committee to the U.S. Commission on Civil Rights, Santa Fe.

    The report briefly outlines the population characteristics, public employment and political representation status of the Dona Ana, Grant, Hidalgo, Luna, Otero, and Sierra counties in southern New Mexico for a 10-year period. The three sections of each profile focus on the city government, largest city in that county, and school district…

  14. Meeting the Needs of Rural Gifted Students with Handicapping Conditions.

    ERIC Educational Resources Information Center

    Poppe, Roger L.; Gabaldon, Thomas

    This paper describes a rural Hispanic community's efforts to identify and develop a program for gifted students in grades 2-6 who are also mildly to moderately handicapped (learning disabled, behavior disordered, or communication disordered). The "Twice Exceptional" (2E) program, in Los Lunas, New Mexico, is a modified full-time separate…

  15. Inert gases in a terra sample - Measurements in six grain-size fractions and two single particles from Lunar 20.

    NASA Technical Reports Server (NTRS)

    Heymann, D.; Lakatos, S.; Walton, J. R.

    1973-01-01

    Review of the results of inert gas measurements performed on six grain-size fractions and two single particles from four samples of Luna 20 material. Presented and discussed data include the inert gas contents, element and isotope systematics, radiation ages, and Ar-36/Ar-40 systematics.

  16. Future lunar missions and investigation of dusty plasma processes on the Moon

    NASA Astrophysics Data System (ADS)

    Popel, Sergey I.; Zelenyi, Lev M.; Zelenyi

    2013-08-01

    From the Apollo era of exploration, it was discovered that sunlight was scattered at the terminators giving rise to ``horizon glow'' and ``streamers'' above the lunar surface. Subsequent investigations have shown that the sunlight was most likely scattered by electrostatically charged dust grains originating from the surface. A renaissance is being observed currently in investigations of the Moon. The Luna-Glob and Luna-Resource missions (the latter jointly with India) are being prepared in Russia. Some of these missions will include investigations of lunar dust. Here we discuss the future experimental investigations of lunar dust within the missions of Luna-Glob and Luna-Resource. We consider the dusty plasma system over the lunar surface and determine the maximum height of dust rise. We describe mechanisms of formation of the dusty plasma system over the Moon and its main properties, determine distributions of electrons and dust over the lunar surface, and show a possibility of rising dust particles over the surface of the illuminated part of the Moon in the entire range of lunar latitudes. Finally, we discuss the effect of condensation of micrometeoriod substance during the expansion of the impact plume and show that this effect is important from the viewpoint of explanation of dust particle rise to high altitudes in addition to the dusty plasma effects.

  17. Feldspar basalts in lunar soil and the nature of the lunar continents

    NASA Technical Reports Server (NTRS)

    Reid, A. M.; Ridley, W. I.; Harmon, R. S.; Warner, J.; Brett, R.; Jakes, P.; Brown, R. W.

    1974-01-01

    It is found that 25% on the Apollo-14 glasses have the same composition as the glasses in two samples taken from the Luna-16 column. The compositions are equivalent to feldspar basalt and anorthosite gabbro, and are similar to the feldspar basalts identified from Surveyor-7 analysis for lunar continents.

  18. Record of source-generated overpressures, Venezuela

    SciTech Connect

    Vrolijk, P.J.; Pottorf, R.J.; Maze, W.B. )

    1996-01-01

    Fluid pressures affect migration of oil, gas, and water in continental margins. Burial and thermal history models describe the degree to which indercompaction or thermal expansion of fluids contribute to fluid pressure histories, but it is more difficult to evaluate how source-terms, such as oil yield or mineral dehydration reactions, impact paleo-fluid pressures. In this study, we document how a thick, maturing source rock helped create near-lithostatic fluid pressures that generated overpressures in reservoir rocks. We analyzed abundant oil-filled and rare aqueous fluid inclusions in calcite-filled fractures in the La Luna Fm. source rock and in the underlying Cogollo Gp. carbonate reservoir in the W. Maracaibo Basin, Venezuela. Homogenization temperatures (Th) of oil-filled inclusions range from 25-42[degrees]C in the La Luna Fm. and from 25-105[degrees]C in the Cogollo Gp., and associated gravities (determined from fluorescence properties) range from 28-43[degrees]API and 17-45[degrees]API, respectively. Integration of Th with the burial and thermal history of the sampled horizons leads to the conclusion that fractures in the La Luna Fm. formed under near-lithostatic fluid pressure conditions in the presence of a gas-charged oil. The values from fractures in the Cogollo Gp. are higher than in the La Luna Fm and become more variable with increasing depth below La Luna. We interpret those fractures to have formed under lower fluid pressure conditions and/or with a less gas-charged oil than for La Luna. This interpretation of the distribution of paleo-fluid pressures is supported by the observation of modern inverted fluid pressure gradients between upper and lower Cogollo Gp. reservoirs. Thus late expulsion of a gas-charged oil created near-lithostatic fluid pressures in the La Luna Fm. source rock, and those fluid pressures bled downward through fractures into the adjoining reservoir rocks, contributing to the overpressures we observe today.

  19. Record of source-generated overpressures, Venezuela

    SciTech Connect

    Vrolijk, P.J.; Pottorf, R.J.; Maze, W.B.

    1996-12-31

    Fluid pressures affect migration of oil, gas, and water in continental margins. Burial and thermal history models describe the degree to which indercompaction or thermal expansion of fluids contribute to fluid pressure histories, but it is more difficult to evaluate how source-terms, such as oil yield or mineral dehydration reactions, impact paleo-fluid pressures. In this study, we document how a thick, maturing source rock helped create near-lithostatic fluid pressures that generated overpressures in reservoir rocks. We analyzed abundant oil-filled and rare aqueous fluid inclusions in calcite-filled fractures in the La Luna Fm. source rock and in the underlying Cogollo Gp. carbonate reservoir in the W. Maracaibo Basin, Venezuela. Homogenization temperatures (Th) of oil-filled inclusions range from 25-42{degrees}C in the La Luna Fm. and from 25-105{degrees}C in the Cogollo Gp., and associated gravities (determined from fluorescence properties) range from 28-43{degrees}API and 17-45{degrees}API, respectively. Integration of Th with the burial and thermal history of the sampled horizons leads to the conclusion that fractures in the La Luna Fm. formed under near-lithostatic fluid pressure conditions in the presence of a gas-charged oil. The values from fractures in the Cogollo Gp. are higher than in the La Luna Fm and become more variable with increasing depth below La Luna. We interpret those fractures to have formed under lower fluid pressure conditions and/or with a less gas-charged oil than for La Luna. This interpretation of the distribution of paleo-fluid pressures is supported by the observation of modern inverted fluid pressure gradients between upper and lower Cogollo Gp. reservoirs. Thus late expulsion of a gas-charged oil created near-lithostatic fluid pressures in the La Luna Fm. source rock, and those fluid pressures bled downward through fractures into the adjoining reservoir rocks, contributing to the overpressures we observe today.

  20. Russian plans for lunar investiagtions. Stage 1

    NASA Astrophysics Data System (ADS)

    Zelenyi, L.; Mitrofanov, I.; Petrukovich, A.; Khartov, V.; Martynov, M.; Lukianchikov, A.

    2014-04-01

    Lunar Race of 60-ies and 70-ies between US and Soviet Union produced outstanding results for lunar science. For many technical reasons mostly near equatorial and mid-latitude Lunar regions were investigated at this glorious time. New epoch of Lunar investigations began at the late 90-ies. It gradually shaped the image of a new wet moon at least at the vicinity of its polar regions. Strong interest to the mechanisms of the formation of a near polar volatiles deposits, their migration and their composition (including the bisotope one) became the central theme of the Russian program of lunar investigations for next 10 years. Certainly the number of other outstanding scientific topics like the properties of Lunar dust, peculiarities of regolith interaction with the supersonic solar wind flow, characteristics of the Lunar magnetic and gravitational anomalies, etc., are planned to be studied both from the orbit and from the surface. First stage of the Russian Lunar Program consists of a four missions: Lunas 25, 26, 27, 28. (The numeration follows Lunar missions of a Soviet Epoch - last successful regolith sample delivery have been accomplished by Luna 24 in 1976). Luna 25 will land to the southern polar site, which would be the most suitable for engineering reasons and also interesting for the science. Second lander Luna 27 will have more sophisticated payload with the additional instruments in comparison with Luna 25. Luna 27 should be landed to the selected landing site at the vicinity of the South Pole, which could be the most promising for installation of the future Lunar Base. It is very important that Luna 27 will be equipped by the subsurface drill to get samples from the permafrost shallow subsurface (one attractive option now is that this drill will be provided by our ESA colleagues having the experience of designing and manufacturing of a similar drill for the Exomars project). The principal difference of the drilling at Luna 27 in comparison with the early

  1. Primordial nucleosynthesis

    NASA Astrophysics Data System (ADS)

    Gustavino, C.; Anders, M.; Bemmerer, D.; Elekes, Z.; Trezzi, D.

    2016-04-01

    Big Bang nucleosynthesis (BBN) describes the production of light nuclei in the early phases of the Universe. For this, precise knowledge of the cosmological parameters, such as the baryon density, as well as the cross section of the fusion reactions involved are needed. In general, the energies of interest for BBN are so low ( E < 1MeV) that nuclear cross section measurements are practically unfeasible at the Earth's surface. As of today, LUNA (Laboratory for Underground Nuclear Astrophysics) has been the only facility in the world available to perform direct measurements of small cross section in a very low background radiation. Owing to the background suppression provided by about 1400 meters of rock at the Laboratori Nazionali del Gran Sasso (LNGS), Italy, and to the high current offered by the LUNA accelerator, it has been possible to investigate cross sections at energies of interest for Big Bang nucleosynthesis using protons, 3He and alpha particles as projectiles. The main reaction studied in the past at LUNA is the 2H(4He, γ)6Li . Its cross section was measured directly, for the first time, in the BBN energy range. Other processes like 2H(p, γ)3He , 3He(2H, p)4He and 3He(4He, γ)7Be were also studied at LUNA, thus enabling to reduce the uncertainty on the overall reaction rate and consequently on the determination of primordial abundances. The improvements on BBN due to the LUNA experimental data will be discussed and a perspective of future measurements will be outlined.

  2. Meat Entree Operation Guides Developed for Use in Fort Lee Interim Central Food Preparation Facility

    DTIC Science & Technology

    1978-11-01

    sauce H ot sauce , tabasco C ol-Flo 67, starch V inegar 11.40 (1 bag...5 0 37.50 60.00. K ettle N 2 · · sauce O nion, dehyd, slic e d 5290 0 .5 0 .. 1 .5 0 2 .5 0 4.00 C h ili pow der 14480. 0 .1 4...30.1+0 W orcestershire sauce . 160~0 0.26 0.78 1..30 2.08. P ot & ’W trlp H ot ~ u c g7 T abasgg l ~ 0 8:g8- ~:8~- ~:dB ~=~ • col-

  3. Hydrogen sulfide, bacteria, and fish: a unique, subterranean food chain.

    PubMed

    Roach, Katherine A; Tobler, Michael; Winemiller, Kirk O

    2011-11-01

    Photoautotrophs are generally considered to be the base of food webs, and habitats that lack light, such as caves, frequently rely on surface-derived carbon. Here we show, based on analysis of gut contents and stable isotope ratios of tissues (13C:12C and 15N:14N), that sulfur-oxidizing bacteria are directly consumed and assimilated by the fish Poecilia mexicana in a sulfide-rich cave stream in Tabasco state, Mexico. Our results provide evidence of a vertebrate deriving most of its organic carbon and nitrogen from in situ chemoautotrophic production, and reveals the importance of alternative energy production sources supporting animals in extreme environments.

  4. Do Protozoa Control the Elimination of Vibrio choleraein Brackish Water?

    NASA Astrophysics Data System (ADS)

    Martínez Pérez, María Elena; Macek, Miroslav; Castro Galván, María Teresa

    2004-05-01

    Elimination of inoculated Vibrio cholerae (107 cells ml-1) within a brackish water bacteria assemblage (Mecoacán Lagoon, State of Tabasco, Mexico) was studied in laboratory microcosms with filtration-fractionated water. Feeding of a ciliate, Cyclidium glaucoma was evaluated using fluorescently labelled V. cholerae o1. Even though V. cholerae was not exploited as the major food source, ciliates were able to eliminate it efficiently. An addition of chitin directly supported the growth of bacteria, although not so much of V. cholerae, and indirectly the growth of the protistan assemblage. Generally, the changes in a bacterial assemblage structure were the most important in V. cholerae elimination.

  5. Genetic signature analysis of Perkinsus marinus in Mexico suggests possible translocation from the Atlantic Ocean to the Pacific coast of Mexico.

    PubMed

    Ek-Huchim, Juan Pablo; Aguirre-Macedo, Ma Leopoldina; Améndola-Pimenta, Monica; Vidal-Martínez, Victor Manuel; Pérez-Vega, Juan Antonio; Simá-Alvarez, Raúl; Jiménez-García, Isabel; Zamora-Bustillos, Roberto; Rodríguez-Canul, Rossanna

    2017-08-02

    The protozoan Perkinsus marinus (Mackin, Owen & Collier) Levine, 1978 causes perkinsosis in the American oyster Crassostrea virginica Gmelin, 1791. This pathogen is present in cultured C. virginica from the Gulf of Mexico and has been reported recently in Saccostrea palmula (Carpenter, 1857), Crassostrea corteziensis (Hertlein, 1951) and Crassostrea gigas (Thunberg, 1793) from the Mexican Pacific coast. Transportation of fresh oysters for human consumption and repopulation could be implicated in the transmission and dissemination of this parasite across the Mexican Pacific coast. The aim of this study was two-fold. First, we evaluated the P. marinus infection parameters by PCR and RFTM (Ray's fluid thioglycollate medium) in C. virginica from four major lagoons (Términos Lagoon, Campeche; Carmen-Pajonal-Machona Lagoon complex, Tabasco; Mandinga Lagoon, Veracruz; and La Pesca Lagoon, Tamaulipas) from the Gulf of Mexico. Secondly, we used DNA sequence analyses of the ribosomal non-transcribed spacer (rNTS) region of P. marinus to determine the possible translocation of this species from the Gulf of Mexico to the Mexican Pacific coast. Perkinsus marinus prevalence by PCR was 57.7% (338 out of 586 oysters) and 38.2% (224 out of 586 oysters) by RFTM. The highest prevalence was observed in the Carmen-Pajonal-Machona Lagoon complex in the state of Tabasco (73% by PCR and 58% by RFTM) and the estimated weighted prevalence (WP) was less than 1.0 in the four lagoons. Ten unique rDNA-NTS sequences of P. marinus [termed herein the "P. marinus (Pm) haplotype"] were identified in the Gulf of Mexico sample. They shared 96-100% similarity with 18 rDNA-NTS sequences from the GenBank database which were derived from 16 Mexican Pacific coast infections and two sequences from the USA. The phylogenetic tree and the haplotype network showed that the P. marinus rDNA-NTS sequences from Mexico were distant from the rDNA-NTS sequences of P. marinus reported from the USA. The ten r

  6. Olmec origins of Mesoamerican writing.

    PubMed

    Pohl, Mary E D; Pope, Kevin O; von Nagy, Christopher

    2002-12-06

    A cylinder seal and carved greenstone plaque bearing glyphs dating to approximately 650 B.C. have been uncovered near the Olmec center of La Venta in Tabasco, Mexico. These artifacts, which predate others containing writing, reveal that the key aspects of the Mesoamerican scripts were present in Olmec writing: the combination of pictographic and glyphic elements to represent speech; the use of the sacred 260-day calendar; and the connection between writing, the calendar, and kingship. They imply that Mesoamerican writing originated in the La Venta polity.

  7. Characteristics of the oil transport network in the South of Mexico

    NASA Astrophysics Data System (ADS)

    Juárez, R.; Fernández, I. Y.; Guzmán, L.

    2017-01-01

    We present a study of some organizational properties of the oil transport network of the Mexican oil company (PEMEX) in a region of the State of Tabasco. Particularly, the generalized centrality and the distribution of connectivities are calculated in order to evaluate some aspects of the structure of the network. We find that the connectivities (k) are characterized by a degree distribution which follows a power-law function of the form, P(k)~k ‑λ, with λ = 2.6. Moreover, our procedure permits to evalute the importance of lines (ducts) and nodes, which can be wells, production headers, separation batteries and petrochemical complexes.

  8. Oil and gas developments in South America, Central America, Caribbean area, and Mexico in 1987

    SciTech Connect

    Wiman, W.D.

    1988-10-01

    Exploration activity in South America, Central America, the Caribbean area, and Mexico in 1987 showed significant increases in seismic acquisition in Belize, Bolivia, Brazil, Costa Rica, Guatemala, Mexico, Paraguay, and Peru, and a decrease in Chile and Venezuela. Exploratory drilling increased in most major producing countries but was accompanied by a decline in development drilling. Most of the increase could be attributed to private companies fulfilling obligations under risk contracts; however, state oil companies in Bolivia, Chile, and Colombia showed significant increased activity, with only Mexico showing a decrease. Colombia again had a dramatic increase in production (29% from 1986). Noteworthy discoveries were made in Bolivia (Villamontes-1); Brazil, in the Solimoes basin (1-RUC-1-AM); Chile (Rio Honda-1); Colombia, in the Llanos basin (Austral-1, La Reforma-1, Libertad Norte-1, Cravo Este-1, and Cano Yarumal-1), in the Upper Magdalena basin (Toldado-1 and Los Mangos-1); Ecuador (Frontera-1, a joint-exploration venture with Colombia); Mexico, in the Chiapas-Tabasco region (Guacho-1 and Iridi-1), in the Frontera Norte area (Huatempo-1); Peru, in the Madre de Dios basin (Armihuari-4X); Trinidad (West East Queen's Beach-1); and Venezuela (Musipan-1X). Brazil's upper Amazon (Solimoes basin) discovery, Colombia's Upper Magdalena basin discoveries Toldado-1 and Los Mangos-1, Mexico's Chiapas-Tabasco discoveries, Peru's confirmation of the giant Cashiriari discovery of 1986, and Venezuela's success in Monagas state were the highlights of 1987. 5 figs., 8 tabs.

  9. Distribution of the Val108/158Met polymorphism of the COMT gene in healthy Mexican population.

    PubMed

    González-Castro, Thelma Beatriz; Tovilla-Zárate, Carlos; Juárez-Rojop, Isela; Pool García, Sherezada; Genis, Alma; Nicolini, Humberto; López Narváez, Lilia

    2013-09-10

    Catechol-O-methyltransferase (COMT) inactivates the catecholamines adrenaline, noradrenaline and dopamine. On the other hand, some studies have reported that the enzymatic activity of COMT is partly genetically determined. With regard to the COMT gene, the most studied polymorphism is the functional variant Val108/158Met (rs4680), which results in substantial three- to four-fold variations in enzyme activity. To date, the rs4680 polymorphism of COMT has been associated with a number of disorders. In addition, this polymorphism has been found to have important differences in frequency according to the studied population. Therefore, the aim of the present study was to evaluate the frequency of a common single nucleotide polymorphism (SNP) Val108/158Met of the COMT gene in the Mexican population. Accordingly, we recruited 431 healthy volunteers. Our sample consisted of 111 healthy individuals from Mexico City and 320 individuals from the state of Tabasco, Mexico. We observed that Met was the most common allele, ranging from 57% (Tabasco) to 85% (Mexico City). In addition, we analyzed the frequency of Val108/158Met polymorphism of Caucasian (54% Met allele), Asian (29% Met allele) and African (34% Met allele) populations separately and also in comparison with Mexican (63% Met allele) population. In conclusion, the distribution of the Val108/158Met polymorphism distinguishes the Mexican population studied from other populations, but it is necessary to increase the size of the sample to get more conclusive results.

  10. Using OSL to Unravel Sedimentation Processes at Usumacinta and Grijalva Rivers (SE Mexico)

    NASA Astrophysics Data System (ADS)

    Munoz-Salinas, E.; Castillo, M.; Cruz-Zaragoza, E.; Sanderson, D.; Kinnaird, T.

    2012-12-01

    The Usumacinta and Grijalva rivers, flowing on the southeastern Mexico, produce the largest runoff of freshwater in Mexico. The Usumacinta and Grijalva join, close to the city of Tabasco, forming a large floodplain. Due to the high discharge, these rivers deliver large quantities of sediment every year. Floods are common during the hurricane season (between May and November) affecting in some cases the populations of the state of Tabasco and in other cases leaving households on a flood risk. In this study we analyze the sedimentation processes at the Usumacinta and Grijalva rivers to determine the flood timing and sediment delivery rates at the floodplain. We use the OSL technique to analyze the luminescence signals coming from fluvial sediments to obtain sedimentation phases and ages in order to estimate fluvial sedimentation rates. To fulfill our goal, we carried out during fieldwork sedimentary profiles at Grijalva and Usumacinta river deposits. Our results of luminescence signals indicate that the Usumacinta and Grijalva rivers exhibit a complex dynamic in the floodplain. We interpret that rivers produce the sediment incision followed by a process of sediment accretion on the margins of rivers.

  11. Differences by gender in completed suicides in a Mexican population: A psychological autopsy study.

    PubMed

    González-Castro, Thelma Beatriz; Hernández-Díaz, Yazmín; Tovilla-Zárate, Carlos Alfonso; González-Gutiérrez, Krystell P; Fresán, Ana; Juárez-Rojop, Isela E; López-Narváez, Lilia; Villar Soto, Mario; Genis, Alma

    2016-02-01

    Using the method of psychological autopsy, we identified differences by gender in socio-demographic aspects, signs and symptoms, and suicide characteristics in a population of the state of Tabasco. Mexico. Between the years 2007-2014, 182 psychological autopsies were documented by the Secretary of Health of the State of Tabasco, Mexico. A structured questionnaire was used to obtain information on socio-demographic aspects and suicide characteristics. The sample was mainly formed by males (78%). 84% of the sample used hanging as suicide method. However, in comparison with the male group, females were older on the average (p = 0.002); they were mostly housewives (37.5%) and had more years of schooling (p = 0.004). Other significant differences predominantly present in the male group were: the use of alcohol at the time of suicide (52.1%), job retirement, and increases in apathy (50.7%) and aggressiveness (36.6%) (p < 0.05). Our results suggest that there are differences by gender between subjects with completed suicide. Factors such as alcohol consumption, job retirement, aggressiveness and isolation/social apathy certainly render men more vulnerable to suicide in the Mexican population. Copyright © 2015 Elsevier Ltd and Faculty of Forensic and Legal Medicine. All rights reserved.

  12. Mechanisms of physiological gustatory sweating and flushing in the face.

    PubMed

    Drummond, P D

    1995-04-08

    Mechanisms of physiological gustatory sweating and flushing were investigated in 21 patients with a facial nerve lesion compromising parasympathetic outflow to the lacrimal gland, and in 13 patients undergoing diagnostic blockade of the stellate ganglion. Vascular responses and electrodermal activity (which reflects sweating) were monitored on each side of the forehead before and during gustatory stimulation with chillies or Tabasco sauce (derived from chillies). Vascular responses in the cheeks were also monitored in 14 patients with a facial nerve lesion. Sympathetic blockade increased gustatory vasodilatation but prevented gustatory sweating on the blocked side of the forehead. A facial nerve lesion did not affect gustatory sweating in the forehead or vasodilatation in the cheeks. However, a facial nerve lesion impaired vasodilatation in the forehead in all six patients who ate chillies, and also in four of five patients whose blood vessels dilated extensively on the normally-innervated side of the forehead when the patients tasted Tabasco sauce. These findings suggest that sympathetic sudomotor activity mediates physiological gustatory sweating in the forehead, whereas sympathetic vasoconstrictor tone inhibits gustatory vasodilatation in the forehead. A parasympathetic vasodilator reflex in the facial nerve contributes actively to gustatory flushing in the forehead, but some other unidentified mechanism influences vascular responses in the cheeks.

  13. Presence of tetrahydro-beta-carboline-3-carboxylic acids in foods by gas chromatography-mass spectrometry as their N-methoxycarbonyl methyl ester derivatives.

    PubMed

    Herraiz, T; Sanchez, F

    1997-03-28

    Various tetrahydro-beta-carboline-3-carboxylic acids (TH beta C-3-COOH) are identified in commercial foods and drinks by GC-MS. Positive identification of 1-methyl-1,2,3,4-tetrahydro-beta-carboline-3-carboxylic acid (MTCA) is demonstrated in soy and tabasco sauces, wine, beer, wine vinegar, cider, orange juice, toasted bread, blue cheese and yoghurt. 1,2,3,4-Tetrahydro-beta-carboline-3-carboxylic acid (THCA) occurs in toasted bread, beer, cider, wine vinegar, soy and tabasco sauce, orange juice and blue cheese. MTCA and THCA are reported for the first time in several of these products. MTCA appears as a mixture of two diastereoisomers with the same mass spectra. MTCA is the major TH beta C-3-COOH in foodstuffs except for toasted bread that contains more THCA. GC-MS analysis of N-methoxycarbonyl methyl ester derivatives of TH beta C-3-COOHs was used for chemical identification. Those derivatives were synthesized in a qualitatively using methyl chloroformate or methyl chloroformate and diazomethane reagents. Electron impact mass spectra of N-methoxycarbonyl-TH beta C-3-COOH methyl esters are reported and fragmentation assigned and discussed. These results prove the presence of TH beta C-3-COOHs in commercial foodstuffs suggesting their uptake during the daily consumption of foods.

  14. [Migration from a rural zone to an urban one is associated with android distribution of body fat in obese women].

    PubMed

    González-Barranco, J; López-Alvarenga, J C; Roiz-Simancas, M; Bravo-García, A L; Fanghänel-Salmón, G; Laviada Arrigunaga, E; Castaño, L R; García Tapia, M P

    2001-01-01

    Studies about migration to industrialized countries have shown an increased prevalence of diabetes, obesity and dyslipidaemias, all of them related to android body fat distribution. Migration status might be influence body fat distribution but it has not been sufficiently investigated. The aim of this study is to determine the relationship between body fat distribution and migration from rural to urban areas in Mexico. This sequential sample of 433 women were seen in the outpatient obesity clinic of four federal states: Tabasco (n = 81), Mexico City (n = 166), Coahuila (n = 80), and Yucatan (n = 106). Migration history from rural to urban area, familial history of diabetes, ages of onset of obesity, height and weight circumferences were obtained. A regression logistic model was used and maintained as dependent variable body fat distribution. Age and federal state were considered as confounders and they adjusted the model. Migrating women from rural to urban area were 121 (27.9%). The waist circumference was higher in Tabasco (102.2 +/- 12 cm), and lesser in Yucatan (93.6 +/- 15 cm, p < 0.001); no differences were found for hip circumference. The logistic regression model showed that body fat distribution is associated to migration from rural to urban area, and also to diabetes of mother and age of onset of obesity. Migrating from rural to urban area is a risk factor for android body fat distribution and this risk increases with age, history of diabetes in mother and adulthood onset o obesity.

  15. New species and records of the earthworm genus Ramiellona (Annelida, Oligochaeta, Acanthodrilidae) from southern Mexico and Guatemala.

    PubMed

    Fragoso, Carlos; Rojas, Patricia

    2014-01-10

    Three new species from the Mexican states of Tabasco and Chiapas are added to the acanthodrilid earthworm genus Ramiellona, R. microscolecina sp. nov., R. tojolabala sp. nov. and R. teapaensis sp. nov. They belong to a group of species with penial setae and last pair of hearts in segment 12. All are holandric and the spermathecae have either a flat circular diverticle in a segment anterior to that of the ampulla (R. microscolecina sp. nov. and R. tojolabala sp. nov.) or two ovoidal and sessile diverticles on opposite sides in the same segment of the ampulla (R. teapaensis sp. nov.). Ramiellona americana (Gates) is re-described from a single specimen from central Guatemala, and the diagnosis of Ramiellona lasiura (Graff) from El Salvador is emended after reinvestigating a paratype specimen from the Senckenberg Naturmuseum Frankfurt. On the basis of several individuals from different populations of the Mexican states of Chiapas and Tabasco, the morphological variation of Ramiellona strigosa setosa Righi is described and its relationship with the Guatemalan Ramiellona strigosa strigosa Gates and Ramiellona eiseni (Michaelsen) is discussed. Finally, the position of Ramiellona within Acanthodrilidae and its relation to genera of the doubtful Octochaetidae is discussed.

  16. Molecular surveillance and phylogenetic analysis of Old World arenaviruses in Zambia.

    PubMed

    Ishii, Akihiro; Thomas, Yuka; Moonga, Ladslav; Nakamura, Ichiro; Ohnuma, Aiko; Hang'ombe, Bernard M; Takada, Ayato; Mweene, Aaron S; Sawa, Hirofumi

    2012-10-01

    In order to survey arenaviruses in the Republic of Zambia, we captured 335 rodents from three cities between 2010 and 2011. Eighteen Luna virus (LUNV) and one lymphocytic choriomeningitis virus (LCMV)-related virus RNAs were detected by one-step RT-PCR from Mastomys natalensis and Mus minutoides, respectively. Four LUNV strains and one LCMV-related virus were isolated, and the whole genome nucleotide sequence was determined by pyrosequencing. Phylogenetic analyses revealed that the LUNV clade consists of two branches that are distinguished by geographical location and that the LCMV-related virus belongs to the LCMV clade, but diverges from the typical LCMVs. Comparison of nucleoprotein amino acid sequences indicated that the LCMV-related virus could be designated a novel arenavirus, which was tentatively named as the Lunk virus. Amino acid sequences of the GP, NP, Z and L proteins showed poor similarity among the three Zambian arenavirus strains, i.e. Luna, Lunk and Lujo virus.

  17. The MacAlpine Hills lunar meteorite and implications of the lunar meteorites collectively for the composition and origin of the moon

    NASA Technical Reports Server (NTRS)

    Warren, Paul H.; Kallemeyn, Gregory W.

    1991-01-01

    The MAC88104/105 meteorite, a lunar highlands regolith breccia, is described. The rock and a number of its component clasts are characterized. One of the clasts is considered to be a rare pristine nonmare rock containing extraordinarily Fe-rich (Fo40) olivine; the other has silicate compositions that extend the range of the Mg-suite in the direction of the high-mg* end of the ferroan-anorthositic suite. For the major element composition of the crust, the highlands meteorites confirm that the two low-Th central nearside sites, Luna 20 and Apollo 16, are approximately representative. The high Al2O3 composition indicated for the upper crusts supports the magmasphere hypothesis. For the trace-element composition of the crust, the highlands meteorites indicate that the central nearside Apollo and Luna sites are in several respects grossly unrepresentative.

  18. Mare Crisium - Regional stratigraphy and geologic history. [from spectral reflectivities of Lunik 24 samples

    NASA Technical Reports Server (NTRS)

    Adams, J. B.; Head, J. W., III; Mccord, T. B.; Pieters, C.; Zisk, S.

    1978-01-01

    Spectral reflectance measurements of five Luna 24 samples and new telescopic reflectance spectra of 10-20 km areas of seven sites in Mare Crisium have been used to calibrate multispectral images of mare units. Based on these data, three major mare units are defined in the Crisium basin and their stratigraphy is interpreted. The oldest mare unit is exposed in the ejecta of the craters Picard and Peirce and along the outer edge of the southeastern part of the basin. The next younger unit includes the Luna 24 site and generally follows a topographic annulus along the basin margin. The youngest mare unit occupies the central part of the basin. It is concluded that subsidence occurred throughout the emplacement of mare units, including extensive warping and downfaulting of the inner part of the Crisium basin.

  19. Toxicity testing using esterase inhibition as a biomarker in three species of the genus Lecane (Rotifera).

    PubMed

    Pérez-Legaspi, Ignacio Alejandro; Rico-Martínez, Roberto; Pineda-Rosas, Arikitza

    2002-04-01

    We have developed an esterase inhibition test to investigate the effects of 10 toxicants, including six metals (cadmium, chromium, copper, lead, mercuric chloride, and titanium) and four organics (benzene, ethyl acetate, toluene, and vinyl acetate) in three species of the benthic rotifer genus Lecane (L. hamata, L. luna, and L. quadridentata). Metals affect esterase inhibition by an average value of 4,957-fold greater than the four organics tested for the three rotifer species. Most of the EC50 (effect concentration where a 50% reduction in esterase activity is observed) values correspond to environmentally realistic concentrations. Comparisons of acute-to-chronic ratios among these three species showed that in two species, L. luna and L. quadridentata, esterase inhibition is an outstanding biomarker for most of the toxicants tested.

  20. A small business approach to nanomaterial environment, health, and safety.

    PubMed

    Gause, Charles B; Layman, Rachel M; Small, Aaron C

    2011-06-01

    Integral to the commercialization process for nanotechnology enabled products is the methodology for protecting workers potentially exposed to nanomaterials during product development. Occupational health surveillance is a key aspect of protecting employees and involves both hazard identification and surveillance of known medical data. However, when the health effects and exposure pathways of both new and existing "nano-scale" chemical substances are not yet well understood, conservative hazard controls and baseline data collection can facilitate both immediate and long-term worker protection. Luna Innovations uses a conservative approach based on risk assessment and the OSHA General Duty Clause. To date, Luna's approach has been effective for our business model. Understanding and managing potential hazards to our nanotechnology workers is key to the success and acceptance of nanotechnology enabled products.

  1. The nature of rays and sources of highland material in Mare Crisium

    NASA Technical Reports Server (NTRS)

    Maxwell, T. A.; El-Baz, F.

    1978-01-01

    Although highland fragments are rare in the Luna 24 core, they should provide an important source of information on the sequence of formation and lithology of lunar east-limb basins. The numerous rays that cross the Crisium basin suggest several sources of highland materials. Both deposition of primary ejecta and reworking of local material were most likely responsible for the formation of ray systems in Mare Crisium. In addition to the fact that Luna 24 landed near the uprange end of a Giordano Bruno ray, incomplete sampling of the uppermost layer and formation of the ray by reworking of in situ regolith suggest that its materials may be scarce or not present in the core. Highland fragments present are most likely to be representative of several highland sources.

  2. AOTF near-IR spectrometers for study of Lunar and Martian surface composition

    NASA Astrophysics Data System (ADS)

    Korablev, O.; Kiselev, A.; Vyazovetskiy, N.; Fedorova, A.; Evdokimova, N.; Stepanov, A.; Titov, A.; Kalinnikov, Y.; Kuzmin, R. O.; Bazilevsky, A. T.; Bondarenko, A.; Moiseev, P.

    2013-09-01

    The series of the AOTF near-IR spectrometers is developed in Moscow Space Research Institute for study of Lunar and Martian surface composition in the vicinity of a lander or a rover. Lunar Infrared Spectrometer (LIS) is an experiment onboard Luna-Glob (launch in 2015) and Luna-Resurs (launch in 2017) Russian surface missions. The LIS is mounted on the mechanic arm of landing module in the field of view (45°) of stereo TV camera. Infrared Spectrometer for ExoMars (ISEM) is an experiment onboard ExoMars (launch in 2018) ESARoscosmos rover. The ISEM instrument is mounted on the rover's mast together with High Resolution camera (HRC). Spectrometers will provide measurements of selected surface area in the spectral range of 1.15-3.3 μm. The electrically commanded acousto-optic filter scans sequentially at a desired sampling, with random access, over the entire spectral range.

  3. Lunar dusty plasma: A result of interaction of the solar wind flux and ultraviolet radiation with the lunar surface

    NASA Astrophysics Data System (ADS)

    Lisin, E. A.; Tarakanov, V. P.; Popel, S. I.; Petrov, O. F.

    2015-11-01

    One of the main problems of future missions to the Moon is associated with lunar dust. Solar wind flux and ultraviolet radiation interact with the lunar surface. As a result, there is a substantial surface change and a near-surface plasma sheath. Dust particles from the lunar regolith, which turned in this plasma because of any mechanical processes, can levitate above the surface, forming dust clouds. In preparing of the space experiments “Luna-Glob” and “Luna-Resource” particle-in-cell calculations of the near-surface plasma sheath parameters are carried out. Here we present some new results of particle-in-cell simulation of the plasma sheath formed near the surface of the moon as a result of interaction of the solar wind and ultraviolet radiation with the lunar surface. The conditions of charging and stable levitation of dust particles in plasma above the lunar surface are also considered.

  4. AFRRI Reports, Second Quarter 1992.

    DTIC Science & Technology

    1992-07-01

    isolated in 5 of 10 (50(,() water-treated mice and in none of colate (16). glucan ( 7), and colony-stimulating factor (18) those treated with ofloxacin...W. Blakey., and T_ J. T1he significance of positise blood cultures: A comprehensive analysis MacVittie. Glucan : Mechanisms involved in its...Luna. and G. P. Bodey ’. Aleh- Therapeutic administration of recombinant human granulocy te col- %Wlla bacteremia in cancer patients. Int .1 tIed

  5. The Development of Therapeutic and Diagnostic Countermeasures to WMD by the Advanced Medical Countermeasures Consortium

    DTIC Science & Technology

    2007-09-01

    neutrophil sequestration and microvessel injury induced by Gram -negative sepsis: studies in p47phox-/- and gp91phox-/- mice. J Immunol 168: 3974–3982, 2002...following airway instillation of CEES. Lung sections were then obtained for histological examination by stain - ing with hematoxylin and eosin. In addition...lung sections were stained with trichrome in order to assess the deposition of fibrin and collagen (Luna, 1968). Statistical Analysis The results

  6. Sacra Fossae

    NASA Image and Video Library

    2015-11-17

    The steep sided depressions in this image captured by NASA 2001 Mars Odyssey spacecraft are fault bounded tectonic features called graben. These depressions are part of a large region of graben called Sacra Fossae. Sacra Fossae is located on the western margin of Lunae Planum. Orbit Number: 60829 Latitude: 18.2961 Longitude: 287.711 Instrument: VIS Captured: 2015-08-31 10:01 http://photojournal.jpl.nasa.gov/catalog/PIA20094

  7. Methods of radar studies of the moon and the planets from spacecraft

    NASA Technical Reports Server (NTRS)

    Krupenio, N. N.

    1974-01-01

    Radar studies of the moon and planets from the earth have been valuable but limited in comparison to radar studies from spacecraft. Autonomous and non-autonomous methods of radar research from space satellites and probes are considered. Results of both the Luna and Surveyor series of lunar spacecraft are presented. It is concluded that use of radar in spacecraft allows valuable, high resolution measurement even near the limb and on the back side of the moon.

  8. Access Issues Associated with U.S. Military Presence in Thailand and the Philippines

    DTIC Science & Technology

    2005-03-01

    on democracy issues arose from the American support of the military regimes in Thailand and President Marcos ’ authoritarian regime in the Philippines...Forces Movement (RAM) and the Marcos -loyalists’ 34 The history of the United States relationship with Thailand and the Philippines had shaped the...from the Filipinos. A revolutionary Filipino general Antonio Luna quipped, ""people are not to be bought and sold like horses and houses. If the aim

  9. Ultrathin amorphous coatings on lunar dust grains.

    PubMed

    Bibring, J P; Duraud, J P; Durrieu, L; Jouret, C; Maurette, M; Meunier, R

    1972-02-18

    UItrathin amorphous coatings have been observed by high-voltage electron microscopy on micrometer-sized dust grains from the Apollo 11, Apollo 12, Apollo 14, and Luna 16 missions. Calibration experiments show that these coatings result from an "ancient" implantation of solar wind ions in the grains. This phenomenon has interdisciplinary applications concerning the past activity of the sun, the lunar albedo, the ancient lunar atmosphere and magnetic field, the carbon content of lunar soils, and lunar dynamic processes.

  10. The peroxisomes strike BAK: Regulation of peroxisome integrity by the Bcl-2 family.

    PubMed

    Chipuk, Jerry Edward; Luna-Vargas, Mark P A

    2017-03-06

    Within the mitochondrial pathway of apoptosis, VDAC2 controls both the localization and proapoptotic activity of BAK. In this issue, Hosoi et al. (2017. J. Cell Biol. https://doi.org/10.1083/jcb.201605002) find that loss of VDAC2 diverts BAK into peroxisome membranes, revealing the ability of BAK to control peroxisome membrane integrity and the release of soluble peroxisomal matrix proteins. © 2017 Chipuk and Luna-Vargas.

  11. In Search of Circasemidian Rhythms

    DTIC Science & Technology

    2006-11-01

    Commission 1975). Most took in many fewer calories. The day’s diet was somewhat boring, consisting primarily of a nutritional drink (Ensure Plus, Abbott...Laboratories), nutritional bars (Luna, Clif Bar Inc.) and water ad lib. For habitual caffeine users, up to about 200 mg was allowed between 07:00 and 08...circulating melatonin in pregnancies complicated by intrauterine growth retardation. Neuroendierinology Letters 20:55-68, 1999. Martineaud JP, Cisse F, Samb

  12. Gila San Francisco Decision Support Tool - 2010

    SciTech Connect

    Sun, Amy Cha-Tien; Tidwell, Vincent C.; Klisa, Geoff; Poplionski, Will

    2014-12-01

    The Gila-San Francisco Decision Support Tool analyzes the water demand and supply for the Gila San Francisco region spanning four counties in southwestern New Mexico (Catron, Hidalgo, Luna and Grant). Catalyzed by the 2004 Arizona Water Settlement Act and prompted by a keen awareness for the unique ecology in the region, the model was developed by Sandia with a collaborative modeling team from federal, state, local, and public stakeholders

  13. Resonator Measurements of Acoustic Characteristics of Some Marine Crustaceans: A Laboratory Experiment.

    DTIC Science & Technology

    1977-03-01

    a It was then decided to mount barium titanate transducers to the cavity exterior. Two 0.500 in. by 0.500 in. - transducers were shaped to...s u r e d at vis vis nodes 1 ( t cp of tn e w a t e r co luna ) and 2 (b o t t c m of th e w at e r column) tespectively. ci. = thermal absornt

  14. Polymer Nanocomposites As Future Materials For Defense & Energy Applications-High Energy Density Storage Systems With Reduced Size And Weight For Pulse Power Applications

    DTIC Science & Technology

    2011-11-21

    Rob Klein from Luna Innovations. A paper summarizing this work has been submitted for publication to IEEETDEI. In this manuscript we reported that...layered materials can also exhibit excellent wide-temperature performance. Barium titanate phenyl phosphnate (BaTi(PPA)3) and titanium phosphonate...calorimetry and impedance spectroscopy with temperature. This is in contrast to barium titanate , which possesses a strong Curie transition at 120

  15. Average chemical composition of the lunar surface

    NASA Technical Reports Server (NTRS)

    Turkevich, A. L.

    1973-01-01

    The available data on the chemical composition of the lunar surface at eleven sites (3 Surveyor, 5 Apollo and 3 Luna) are used to estimate the amounts of principal chemical elements (those present in more than about 0.5% by atom) in average lunar surface material. The terrae of the moon differ from the maria in having much less iron and titanium and appreciably more aluminum and calcium.

  16. Sedimentologic Expression of the Cretaceous OAEs in a Tropical Epicontinental Sea

    NASA Astrophysics Data System (ADS)

    Silva-Tamayo, J. C.; Eisenhauer, A.

    2015-12-01

    The acidification and deoxygention of modern oceans are major environmental concerns to the international community. The effects of ocean acidification and deoxigention in the biogeochemical cycles of modern tropical oceans are poorly constrained mainly due to the lack of empirical and quantitative data. The Cretaceous World witnessed several period of potential ocean acidification and deoxygenation, which resulted from the rapid additions of volcanic derived CO2 to the atmosphere. The effects of ocean acidification and deoxygenation on the Cretaceous biogeochemical cycles are evidenced mainly by major global C-isotope anomalies. These anomalies parallel the occurrence of organic rich black shales as well as major decreases in the deposition of shallow marine carbonates worldwide. Here we use detailed C- and Sr- chemostratigraphy as well as published bioestratigraphic information and volcanic zircon U-Pb ages to precisely constrain the geochemical and sedimentologic expression of the Cretaceous OAES along a tropical epicontinental sea, the La Luna Sea. Our multi-pronged approach allows identifying the occurrence of several of the Cretaceous Oceanic Anoxic Events (OAEs) in carbonate units paleogeographically located along the northern most part of the La Luna Sea, i.e. Weissert-OAE-(Palanz and Rosablanca Formations), Faraoni-(Rosablanca Formation), AOE1a-(Paja and Fomeque Formations, Cogollo Group), OAE1c-(Cogollo Group), OAE2-(Cogollo Group), OAE3-(La Luna Formation). These events are preserved in highly euxinic - organic rich "black shales" successions deposited along the deepest part of the seaway at the Middle Magdalena Valley and Cundinamarca Basin; Weiser-OAE-(Lutitas de Macanal Formation), OAE1a-(Paja Formation, Fomeque Formation), OAE1C-(San Gil Formation). Regional changes in depositional settings and sedimentary facies preserving the different Cretaceous OAEs were likely the result of the combined action of regional changes in paleogeography and tectonic

  17. Gesture-Directed Sensor-Information Fusion (GDSIF) for Protection and Communication in Hazardous Environments

    DTIC Science & Technology

    2009-11-20

    G. Rogers, R. Luna, and J. Ellen, “Wireless Communication Glove Apparatus for Motion Tracking, Gesture Recognition , Data Transmission, and Reception...and easier to deploy in a variety of ways. (See, for example, [1] and [3].) The current eGloves have magnetic and motion sensors for gesture ... recognition [5], [6]. An important future step to enhance the effectiveness of the war fighter is to integrate CBRN and other sensors into the eGloves

  18. Directed Vapor Deposition of a Cadmium Replacement Coating for High Strength Fasteners

    DTIC Science & Technology

    2009-03-01

    Zn -Ni-based ternary alloy systems for improved performance including Co, Al , Cu , and Fe, Luna selected Co and Cu ...SEM, EDS, and XRD techniques. Analyses revealed that both Zn -Ni and Zn -Ni-Co alloys can be deposited onto substrates with microstructural and...evaluations were focused on depositing the Zn -Ni- Cu ternary alloy system in order to optimize coating parameters before switching over to the Zn

  19. Petrological Mapping of the Crater Boguslawsky

    NASA Astrophysics Data System (ADS)

    Wöhler, C.; Evdokimova, N. A.; Feoktistova, E. A.; Grumpe, A.; Kapoor, K.; Berezhnoy, A. A.; Shevchenko, V. V.

    2015-10-01

    An analysis of orbital spectral data of the crater Boguslawsky, the intended target region of the Russian Luna-Glob mission, is performed. We have constructed a high- resolution DEM of the crater Boguslawsky, based on which the temperature regime on the surface is investigated. The depth of the OH absorption feature is analysed.The content of the main elements is estimated, and a petrologic map is constructed accordingly.

  20. Results of investigating the physicomechanical properties of a sample of lunar surface material in a research chamber in nitrogen

    NASA Technical Reports Server (NTRS)

    Leonovich, A. K.; Gromov, V. V.; Dmitriyev, A. N.; Lozhkin, V. A.; Pavlov, P. S.; Rybakov, A. V.; Shvarev, V. V.

    1974-01-01

    Results are reported on an investigation of the mechanical properties of the lunar surface material sample returned by the Luna 16 automatic station. The study included determination of the specific weight of the surface material, the nature of its disintegration, and the determination of its compressibility characteristics, shear resistance, and bearing capacity. Quantitative data are presented on mechanical properties for the lunar surface material, many of which are determined for the first time. The instruments and experimental techniques are described.