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Aparición de resistencia a herbicidas, en una población de malezas  

NSDL National Science Digital Library

El uso repetido del mismo herbicida, puede provocar poblaciones de malezas que consisten de biotipos susceptibles (S) que son controlados y biotipos resistentes (R), que escapan al control para producir y retornar semilla con la característica de resistencia, al banco de semillas del suelo. Esta lección se enfocará en la dinámica poblacional de una población de malezas mezclada con biotipos S y R. Se comparará y contrastará la tasa a la que aparecen malezas resistentes en una población bajo diversas presiones de selección. ****** Esta lección se enfocará en la dinámica poblacional de una población mezclada (biotipos susceptibles y resistentes a un herbicida), y comparar y contrastar la tasa a la cual aparece resistencia al herbicida, en una población de malezas mezclada, bajo diversas presiones de selección.


Chemosystematics of some Indian members of the Acanthaceae  

Microsoft Academic Search

Fifty-eight taxa belonging to 3 subfamilies of Acanthaceae have been screened for leaf flavonoids, phenolic acids and aucubins.\\u000a The patterns of distribution of leaf phenolics among the taxa investigated suggest that: (i) there are 3 well-defined taxonomic\\u000a groups; (ii) the treatment of Thunbergiaceae as distinct from Acanthaceae (Sensu stricto) is justified; (iii) Nelsonioideae appears to be an intermediate link between

M Daniel; S D Sabnis



Evolutionary Relationships Within the Species-Rich Genus Ruellia (Acanthaceae)  

Microsoft Academic Search

Phylogenetic relationships among species of the large genus Ruellia (Acanthaceae) have never been studied. Ruellia, with approximately 300 species, is geographically widespread and morphologically diverse. Molecular data for 196 specimens from the nuclear ribosomal ITS region and the chloroplast trnG-trnR region were used to test monophyly of the genus against closely related genera in Ruellieae, to reconstruct phylogenetic relationships among

Erin A. Tripp



Palynological study of the genera Ruellia, Ecbolium, Asystasia, Blepharis and Dicliptera (Acanthaceae) of Yemen  

NASA Astrophysics Data System (ADS)

Pollen morphology of five genera of the family Acanthaceae, namely Ruellia, Blepharis, Asystasia, Ecbolium and Dicliptera (Acanthaceae) of Yemen has been examined using light and scanning electron microscope. Pollen descriptions were provided with two shapes distinguished, spheroidal and prolate. Most of the pollen grains were tricolporate amd psuedocolpi except those of Blepharis which are colpate. The surface is coarsely reticulate, in addition to the lumina that varies in size.

Al-Hakimi, S. Anisa; Maideen, Haja; Latiff, A.




Microsoft Academic Search

We used sequence data from the intron and spacer of the trnL-trnF chloroplast region to study phylogenetic relationships among Acanthaceae. This region is more variable than other chloroplast loci that have been sequenced for members of Acanthaceae (rbcL and ndhF), is more prone to length mutations, and is less homoplasious than these genes. Our results indicate that this region is



Origin of African Physacanthus (Acanthaceae) via Wide Hybridization  

PubMed Central

Gene flow between closely related species is a frequent phenomenon that is known to play important roles in organismal evolution. Less clear, however, is the importance of hybridization between distant relatives. We present molecular and morphological evidence that support origin of the plant genus Physacanthus via “wide hybridization” between members of two distantly related lineages in the large family Acanthaceae. These two lineages are well characterized by very different morphologies yet, remarkably, Physacanthus shares features of both. Chloroplast sequences from six loci indicate that all three species of Physacanthus contain haplotypes from both lineages, suggesting that heteroplasmy likely predated speciation in the genus. Although heteroplasmy is thought to be unstable and thus transient, multiple haplotypes have been maintained through time in Physacanthus. The most likely scenario to explain these data is that Physacanthus originated via an ancient hybridization event that involved phylogenetically distant parents. This wide hybridization has resulted in the establishment of an independently evolving clade of flowering plants.

Tripp, Erin A.; Fatimah, Siti; Darbyshire, Iain; McDade, Lucinda A.



Origin of African Physacanthus (Acanthaceae) via wide hybridization.  


Gene flow between closely related species is a frequent phenomenon that is known to play important roles in organismal evolution. Less clear, however, is the importance of hybridization between distant relatives. We present molecular and morphological evidence that support origin of the plant genus Physacanthus via "wide hybridization" between members of two distantly related lineages in the large family Acanthaceae. These two lineages are well characterized by very different morphologies yet, remarkably, Physacanthus shares features of both. Chloroplast sequences from six loci indicate that all three species of Physacanthus contain haplotypes from both lineages, suggesting that heteroplasmy likely predated speciation in the genus. Although heteroplasmy is thought to be unstable and thus transient, multiple haplotypes have been maintained through time in Physacanthus. The most likely scenario to explain these data is that Physacanthus originated via an ancient hybridization event that involved phylogenetically distant parents. This wide hybridization has resulted in the establishment of an independently evolving clade of flowering plants. PMID:23383261

Tripp, Erin A; Fatimah, Siti; Darbyshire, Iain; McDade, Lucinda A



A new species, new combinations, and a new name in Acanthaceae from northern South America  

Microsoft Academic Search

A new species of Acanthaceae (Ruellia saülensis) is described and illustrated from French Guiana, and three new combinations (Justicia potarensis, J. flaviflora, andJ. tobagensis) and one new name (Justicia coppenamensis) are proposed. The new species is compared to its closest relative (Ruellia rubra), and a justification of the transfers is provided.

Dieter C. Wasshausen




Microsoft Academic Search

Ruellia simplex, an older and overlooked name for Ruellia tweediana and Ruellia coerulea (Acanthaceae). Darwiniana 45(2): 201-203. Ruellia simplex, the name of a species of Ruellia described from Cuba in 1870, is the oldest name for the neotropical species generally known as Ruellia tweediana, Ruellia coerulea and Ruellia mala- cosperma. Therefore Ruellia simplex has priority and reduces tha latter names

Cecilia Ezcurra; Thomas F. Daniel; Río Negro



Comparative floral anatomy of Strobilanthinae (Acanthaceae), with particular reference to internal partitioning of the flower  

Microsoft Academic Search

This paper provides the first comparative survey of structural variation in inflorescence architecture and flower structure of Hemigraphis and other members of the subtribe Strobilanthinae (Acanthaceae). Several discrete structural characters are identified which may provide support for phylogenetic relationships within the group. These include (1) the presence or absence of an accessory bud, (2) the presence or absence of a

E. C. Moylan; P. J. Rudall; R. W. Scotland




Microsoft Academic Search

2 RESUMEN Se estudia e ilustra la morfología del polen de las familias Acanthaceae, Vitaceae y Violaceae pertenecientes a la flora del Valle de México; la primera está representada por: Acanthus mollis L., Anisacanthus quadrifidus (Vahl) Standley, Dicliptera peduncularis Nees, Dyschoriste decumbens (Gray) O. Ktze., D. microphylla (Cav.) O. Ktze., Justicia furcata Jacq., Pseuderanthemum praecox (Benth.) Leonard, Ruellia bourgaei Hemsl.,



Pharmacognostical evaluation of leaf of Bada Rasna [Nelsonia canescens (Lam.) Spreng.; Acanthaceae].  


Nelsonia canescens (Lam.) Spreng. (Acanthaceae), a well-known plant in traditional systems of medicine, known as "Bada Rasna" by the traditional practitioners of Odisha, is being used as Rasna for managing pain and inflammation. The detailed macroscopic and microscopic characters of the plant, except its root, are lacking. Hence, it was thought worth to study the leaves of the plant for its detailed morphological and microscopical characters, by following the standard pharmacognostical procedures. The study shows the presence of diacytic stomata in the lower epidermis of lamina, microsphenoidal and prismatic crystals of calcium oxalate in the mesophyll cells, simple and glandular trichomes. The observed major diagnostic characters of the leaf may find useful for its standardization. PMID:23661868

Acharya, Rabinarayan; Padiya, Riddhish H; Patel, Eisha D; Rudrapa, Harisha C; Shukla, Vinaya J; Chauhan, Malati G



LC-DAD-MS-based metabolite profiling of three species of Justicia (Acanthaceae).  


Olean-12-en-3?-24 diol (A), auranamide (B), aurantiamide acetate (C), 2?,3?-dihydroxy-olean-12-en-28-oic acid (D) and quindoline (E) were isolated from the dichloromethane (CH2Cl2) extract of the stems of Justicia secunda (Acanthaceae). Liquid chromatography with ultraviolet and mass spectrometric detection was used to acquire more knowledge of the chemical composition of this extract and to monitor variations in profiles of both the isolated and the other non-identified compounds in Justicia refractifolia and Justicia graciliflora. The compound classes, phenolic and olefinic amides, feruloyltyramine amides, 2,5-diaryl-3,4-dimethyltetrahydrofuranoid lignans, peptide alkaloids, phenylalanine derivatives, conjugated ynones, indolquinoline alkaloids, triterpenes and pigments, were tentatively identified based on the LC-DAD-APCI-MS analysis. The most frequently encountered compound among the species was auranamide while the distribution of quindoline was limited to J. secunda. Moreover, the acetylcholinesterase inhibitory activity of the isolated compounds was determined. PMID:23126522

Calderón, Angela I; Hodel, Adam; Wolfender, Jean-Luc; Gupta, Mahabir P; Correa, Mireya; Hostettmann, Kurt



N-H.N hydrogen bonding in 4,6-diphenyl-2-pyrimidinylamine isolated from the plant Justicia secunda (Acanthaceae).  


The title compound, C(16)H(13)N(3), isolated from Justicia secunda (Acanthaceae), comprises two molecules (which differ slightly in conformation) in the asymmetric unit of space group P-1. Intermolecular N(amino)-H.N(pyrm) interactions (N(pyrm) is a pyrimidine ring N atom) involve only one of the two donor amino H atoms and pyrimidine N atoms per molecule, forming dimeric units via R(2)(2)(8) rings, with N.N distances of 3.058 (2) and 3.106 (3) A, and N-H.N angles of 172.7 (18) and 175.8 (17) degrees. The dimers are linked by C-H.pi(arene) contacts, with an H.centroid distance of 2.77 A and a C-H.centroid angle of 141 degrees. PMID:15071219

Gallagher, John F; Goswami, Shyamaprosad; Chatterjee, Baidyanath; Jana, Subrata; Dutta, Kalyani



Occurrence and forms of Kranz anatomy in photosynthetic organs and characterization of NAD-ME subtype C4 photosynthesis in Blepharis ciliaris (L.) B. L. Burtt (Acanthaceae)  

Microsoft Academic Search

Blepharis (Acanthaceae) is an Afroasiatic genus com- prising 129 species which occur in arid and semi-arid habitats. This is the only genus in the family which is reported to have some C4 species. Blepharis ciliaris (L.) B. L. Burtt. is a semi-desert species with distribu- tion in Iran, Oman, and Pakistan. Its form of photosyn- thesis was investigated by studying

Hossein Akhani; Maraym Ghasemkhani; Simon D. X. Chuong; Gerald E. Edwards



Effect of the aqueous extract of Justicia insularis T. Anders (Acanthaceae) on ovarian folliculogenesis and fertility of female rats.  


Justicia insularis T. Anders (Acanthaceae) is a medicinal plant whose leaves and those of three other plants are mixed for the preparation of a concoction used to improve fertility and to reduce labour pains in women of the Western Region of Cameroon. Previous studies have demonstrated the inducing potential on ovarian folliculogenesis and steroidogenesis of the aqueous extract of the leaf mixture (ADHJ) of four medicinal plants (Aloe buettneri, Dicliptera verticillata, Hibiscus macranthus and Justicia insularis) among which the later represented the highest proportion. This study was aimed at evaluating the ovarian inducing potential of J. insularis in immature female rats. Various doses of the aqueous extract of J. insularis were daily and orally given, for 20 days, to immature female rats distributed into four experimental groups of twenty animals each. At the end of the experimental period some biochemical and physiological parameters of ovarian function were assayed. The administration of the aqueous extract of Justicia insularis significantly induced an early vaginal opening in all treated groups (P < 0.001) as well as an increase (at doses of 50 or 100 mg/kg) in the number of hemorrhagic points, Corpus luteum, implantation sites, ovarian weight, uterine and ovarian proteins. Ovarian cholesterol level (P < 0.05) significantly decreased in animals treated with the lowest dose (12.5 mg/kg). The evaluation of the toxicological effects of the extract on pregnancy showed that it significantly increased pre- and post-implantation losses, resorption index and decreased the rate of nidation as well as litter's weight. These results suggest that the aqueous extract of Justicia insularis induces ovarian folliculogenesis thus justifying its high proportion in the leaf mixture of ADHJ. PMID:23983335

Telefo, Phelix Bruno; Tagne, Simon Richard; Koona, Olga Elodie Sandrine; Yemele, Didiane M; Tchouanguep, Félicité M



Imaginario Social: Una aproximación  

Microsoft Academic Search

En este texto presentamos una revisión, -a modo de ejercicio de reflexión colectiva-, de la extensa producción bibliográfica de Michel Maffesoli, buscando articular desde los supuestos presentes en su obra, la noción de imaginario social. Para comprender el contexto de producción de este sociólogo francés, hemos comenzado por hacer una breve revisión de sus principales trabajos e influencias teóricas. Posteriormente

Ricardo Espinoza; Raúl García; Martín Holzknecht; Carolina Jiménez



Microsoft Academic Search

Dyschoriste novogaliciana is described and illustrated. It is known from four states in western Mexico, and has been collected numerous times in the Nueva Galicia region. A key to all species of Dyschoriste in the Nueva Galicia region of west-central Mexico is provided. Ruellia leucantha var. postinsularis is elevated to the rank of subspecies. It differs from R. leucantha subsp.

Thomas F. Daniel


Taxonomic notes on Mexican Ruellia (Acanthaceae)  

Microsoft Academic Search

The new nameRuellia comonduensis is provided for the species previously known asR. cordata Brandegee.Ruellia chilpancingana, a new species known only from Guerrero in southwestern Mexico, is described and compared to morphologically similar species.\\u000a It is unique among Mexican species ofRuellia based on the following combination of characters: caducous bracteoles and secondary bracteoles, multiflowered dichasia from\\u000a leaf axils, yellowish and cylindric-funnelform

Thomas F. Daniel



Petal anatomy of four Justicia (Acanthaceae) species  

NASA Astrophysics Data System (ADS)

Comparative anatomical study on flower petals was studied in four selected Justicia species from Peninsular Malaysia, i.e. J. comata (L.) Lam., J. carnea Lindl. J. betonica Linn. and J. procumbens L with the objective to provide useful data for species identification and differentiation within the genus of Justicia. Methods used in this study are mechanical scrapping on the leaf surfaces and observation under light microscope. Finding in this study has shown that all species are sharing similar type of anticlinal walls pattern, which is sinuous pattern. Two or more type of trichomes is present in all species studied and this character can be used to differentiate Justicia species. Simple multicellular trichomes are found to be present in all species studied. Justicia betonica can be isolated from other species by the existence of cyclo-paracytic stomata on the petal surfaces.

Amirul-Aiman, A. J.; Noraini, T.; Nurul-Aini, C. A. C.; Ruzi, A. R.



Una visita en Sud America  

NASA Astrophysics Data System (ADS)

Oisfrute de una estadfa en el Hotel La Silla, el mejor hotel de Sud America con su tan unica atmosfera extraterrestre! Los espera su calificado personal de experimentados hoteleros, jefes de cocina, etc., ansiosos todos de satisfacer sus deseos hasta el mas mfnimo detalle. Naturalmente nuestro espacioso restaurant de tres estrellas ofrece un completo surtido de exquisitas comidas y deliciosos tragos (conocedores usualmente eligen "Oelicia Orion" 0 "Centauro Especial"). EI servicio cempleto durante 24 horas incluye nuestra ya mundialmente famosa "Cena de medianoche para los miradores de estrellas", por eso - no olvide: No pierda la oportunidad de una estadfa en EL HOTEL LA SILLA - una experiencia maravillosa!



Una técnica para filtrar patrones de fringing  

NASA Astrophysics Data System (ADS)

Se presenta una nueva técnica para filtrar los patrones de fringing producidos en los CCDs tipo RCA. El método consiste en construir un mapa con los ángulos de inclinación de las franjas en cada punto de la imagen. Este mapa es ulteriormente utilizado para alinear con el patrón de interferencia una ventana estrecha, sobre la que se aplica un filtro de mediana. Este procedimiento permite eliminar la mayor parte del ruido del patrón de fringing sin destruirlo.

Ostrov, P. G.


New species of Ruellia (Acanthaceae) from southern South America  

Microsoft Academic Search

Two new species ofRuellia,R. epallocaulos from northeastern Argentina, southern Brazil, and eastern Paraguay, andR. kleinii from southern Brazil, are described, illustrated and compared to related species.

Cecilia Ezcurra; Dieter C. Wasshausen



¿Es la Ocratoxina A una micotoxina mutagénica?  

Microsoft Academic Search

Resumen: La ocratoxina A es una micotoxina producida por especies de los géneros Aspergillus y Penicillium que a través de los alimentos puede pasar al ser humano. Su órgano diana es el riñón pero también es hepatotóxica, inmunotóxica y teratogéni- ca. Ha sido clasificada por la Agencia Internacional de Investigación contra el Cáncer (IARC) como posible carcinóge- no humano (clase

Arbillaga L; López de Cerain




Microsoft Academic Search

RESUMEN La histerectomía constituye la segunda cirugía más efectuada en mujeres en edad fértil. Por esto cada día más ginecólogos se interesan en buscar técnicas de menor invasión. Dentro de este concepto y con el objetivo de preservar la indemnidad del suelo pélvico, muchos hemos propuesto la histerectomía supracervical por laparoscopía, como una de las técnicas quirúrgicas que más auge



Tècniques dramàtiques per a una educació integral i integradora  

Microsoft Academic Search

La dramatización está siendo un recurso didàctico y pedagógico cada vez más utilizado en nuestras escuelas y en otros ámbitos educativos. Un aprendizaje significativo, donde todos los aspectos del individuo se tengan en cuenta: emociones, sentimientos, actitudes, valores, aptitudes intelectuales, artísticas y sociales, etc. requiere una metodología que propicie un crecimiento personal que proporcione al individuo una educación integral e

Maria Vilanova i Vila-Abadal



Una búsqueda de la identidad regional em Astrometria  

NASA Astrophysics Data System (ADS)

La idea sobre una reunión latino-americana que congregara a las personas que desarrollan su trabajo en el área de la astrometría, se gestó a partir de una de las reuniones que el proyecto QUEST realizaba anualmente en Mérida (Venezuela). El proyecto QUEST (Quasars Equatorial Survey Team) celebraba su IV Reunión Anual, en la cual se hacía una revisón de la marcha del proyecto durante el último año. Además, se exponían los logros científicos y técnicos alcanzados hasta el momento y se planificaba el futuro del mismo para el período anual siguiente.

Abad, C.



La reconstrucción del seno después de una mastectomía

Hoja informativa que describe la reconstrucción del seno (mama) después de una mastectomía. Contiene información sobre las opciones quirúrgicas, los cuidados de seguimiento y los exámenes de detección del cáncer de seno después de la reconstrucción.


Doble o Más: Doblar o Triplicar Una Receta  

NSDL National Science Digital Library

Escoja una receta para doblarla (o triplicarla, cuadruplicarla, o partirla). Enseñe la receta a todo el grupo y pregúnteles: Cuánto vamos a necesitar para incrementar la receta para que todos puedan comer? Cómo lo saben? Una vez el grupo ha decidido cómo modificar la receta, asigne un ingrediente para incrementar y medir. A medida que los chicos deciden cómo hacerlo, exploran fracciones, multiplicación, y suma. Pruebe esta actividad con comida, una ârecetaâ para combinar pinturas para conseguir determinados colores, o para hacer masilla para modelar. Disponible en formato web, en formato pdf, y en inglés.




Lichens from the Una National Park (Bosnia and Herzegovina)  

PubMed Central

A list of 57 taxa of lichens (56 species) from the Una National Park in the north-western part of Bosnia and Herzegovina is presented. Bacidia subincompta, Buellia griseovirens, Candelariella reflexa, Cetrelia monachorum, Fulgensia subbacteata, Lecanora subcarpinea, L. subrugosa, and Trapeliopsis viridescens are new for Bosnia and Herzegovina.

Bilovitz, Peter O.; Turk, Roman; Mayrhofer, Helmut



Cálculo de una losa de pavimento apoyada en toda su extensión sobre una base granular con carga de esquina  

Microsoft Academic Search

Se desarrolla el cálculo de un losa firme de hormigón apoyada sobre una base granular de módulo de reacción ?.\\u000aEl método ideado para este cálculo se basa en suponer las ecuaciones dadas por la elasticidad, válidas a cierta\\u000adistancia de los puntos de aplicación de las cargas (hipótesis de Saint-Venant), considerando un estado de\\u000adeformación cilíndrica. Para aplicar dichas

Javier Jenaro Mac-Lennan



Hígado Graso no Alcohólico: una entidad cada vez más frecuente y de pronóstico incierto  

Microsoft Academic Search

RESUMEN La enfermedad de hígado graso no alcohólica, en inglés non alcoholic fatty liver disease (NAFLD), es definida como una acumulación excesiva de grasa en los hepatocitos. Presenta una prevalencia mundial de alrededor del 15 al 25%. Los factores de riesgo asociados frecuentemente a NAFLD son obesidad, diabetes tipo 2 y dislipemia. Por un lado se ha propuesto que una

Andrea Mariel Actis


Genetic variation in the response of the weed Ruellia nudiflora (Acanthaceae) to arbuscular mycorrhizal fungi.  


The main goal of this work was to test for plant genetic variation in the phenotypic plasticity response of the weed Ruellia nudiflora to arbuscular mycorrhizal (AM) fungi inoculation. We collected plants in the field, kept them under homogeneous conditions inside a nursery, and then collected seeds from these parent plants to generate five inbred lines (i.e., genetic families). Half of the plants of each inbred line were inoculated with AM fungi while the other half were not (controls); a fully crossed experimental design was then used to test for the effects of treatment (with or without AM fungi inoculation) and inbred line (genetic family). For each plant, we recorded the number of leaves produced and the number of days it survived during a 2-month period. Results showed a strong positive treatment effect (plastic response to AM fungi inoculation) for leaf production and survival. Moreover, in terms of survival, the treatment effect differed between genetic families (significant genetic family by treatment interaction). These findings indicate that the positive effect of AM fungi on plant survival (and potentially also growth) differs across plant genotypes and that such condition may contribute to R. nudiflora's capacity to colonize new environments. PMID:19862559

Ramos-Zapata, José Alberto; Campos-Navarrete, María José; Parra-Tabla, Víctor; Abdala-Roberts, Luis; Navarro-Alberto, Jorge



Microsatellites for the mangrove tree Avicennia germinans (Acanthaceae): Tools for hybridization and mating system studies.  


• Premise of the study: We developed a new set of microsatellite markers for the black mangrove Avicennia germinans, to provide new informative tools for further studies of the mating system, interspecific hybridization, and population genetics. • Methods and Results: We used the microsatellite-enriched library approach to isolate and characterize 25 new primer pairs. Sixteen of them are polymorphic, showing a variable degree of variation in A. germinans, while nine were monomorphic in the samples examined. Eight exhibited private alleles in A. schaueriana. • Conclusions: These results indicate that these new microsatellite markers will be useful molecular tools for further studies of A. germinans and A. schaueriana population genetics, mating systems, and hybridization. PMID:21616893

Mori, Gustavo M; Zucchi, Maria I; Sampaio, Iracilda; Souza, Anete P



Predispersal predation of an understory rainforest herb Aphelandra aurantiaca (Acanthaceae) in gaps and mature forest.  


The opening of a canopy gap at Los Tuxtlas rainforest has an impact on populations of the understory herb Aphelandra aurantiaca: the ratio of recruited seedlings per reproductive individual is 1:17 in mature forest vs. gaps. Predation occurring before seed dispersal seems a plausible explanation for this observed difference. In a field experiment, in which insecticide was applied to plants growing in gaps and mature forest, we evaluated the extent to which herbivore damage to flowers, fruits, and seeds reduces the number of seeds available for seedling establishment. Under natural conditions, ?30% of the flowers and >70% of the capsules of A. aurantiaca showed herbivore damage, but its impact changed depending on the type of forest habitat. Flower and fruit herbivores caused more damage in closed forest than in gaps, and this difference was even bigger under the insecticide treatment. Insecticide effectiveness varied depending on the type of forest patch. The highest herbivore impact on seeds was found in the mature forest without insecticide treatment, where most seeds were destroyed. The percentages of seed damage reported here show that predispersal predation is limiting seedling recruitment, especially in mature forest. Other possible explanations might be differences in insect composition, densities, and behavior between gaps and mature forest. PMID:10449389

Calvo-Irabién, L M; Islas-Luna, A



Ruellia sect. Urceolata ( Acanthaceae ), a novel species complex from southern Mexico  

Microsoft Academic Search

A new section in MexicanRuellia, R. sect.Urceolata comprising three species (includingR. cedilloi, spec. nova), endemic to Mexico, is described and illustrated. The taxonomic relationship and differentiation of the species are discussed. Evolution in Mexican Ruellas seems to be occurring at the diploid level.

T. P. Ramamoorthy



Artificial interspecific hybridization in temperate and tropical species of ruellia (acanthaceae)  

Microsoft Academic Search

Artificial hybridization experiments involving 25 taxa ofRuellia had as one objective to determine the possibility of any genetic relationships between North American temperate species and\\u000a certain widespread tropical American taxa. The results confirm a close morpho-genetic link betweenR. caroliniensis-R. pedunculata and the Caribbean species R.geminiflora and betweenR. nudiflora and the pantropical R.tuberosa. A second objective was to test the genetic

Robert W. Long



Generalization versus specialization in pollination systems: visitors, thieves, and pollinators of Hypoestes aristata (Acanthaceae).  


Many recent studies have suggested that the majority of animal-pollinated plants have a higher diversity of pollinators than that expected according to their pollination syndrome. This broad generalization, often based on pollination web data, has been challenged by the fact that some floral visitors recorded in pollination webs are ineffective pollinators. To contribute to this debate, and to obtain a contrast between visitors and pollinators, we studied insect and bird visitors to virgin flowers of Hypoestes aristata in the Bamenda Highlands, Cameroon. We observed the flowers and their visitors for 2-h periods and measured the seed production as a metric of reproductive success. We determined the effects of individual visitors using 2 statistical models, single-visit data that were gathered for more frequent visitor species, and frequency data. This approach enabled us to determine the positive as well as neutral or negative impact of visitors on H. aristata's reproductive success. We found that (i) this plant is not generalized but rather specialized; although we recorded 15 morphotaxa of visitors, only 3 large bee species seemed to be important pollinators; (ii) the carpenter bee Xylocopa cf. inconstans was both the most frequent and the most effective pollinator; (iii) the honey bee Apis mellifera acted as a nectar thief with apparent negative effects on the plant reproduction; and (iv) the close relationship between H. aristata and carpenter bees was in agreement with the large-bee pollination syndrome of this plant. Our results highlight the need for studies detecting the roles of individual visitors. We showed that such an approach is necessary to evaluate the pollination syndrome hypothesis and create relevant evolutionary and ecological hypotheses. PMID:23593135

Padyšáková, Eliška; Bartoš, Michael; Tropek, Robert; Jane?ek, St?pán



A new name and a new species in Mexican Ruellia ( Acanthaceae )  

Microsoft Academic Search

Based on pollen and floral morphology,Blechum grandiflorum is transferred toRuellia, and the nameR. mirandana is proposed for this species. A new species,Ruellia tuxtlensis, is described which is distinguishable fromR. mirandana by its longer spike and elliptic bracts. It is presently known only from the lowlands of Veracruz, Mexico.

T. P. Ramamoorthy; Yolanda Hornelas Uribe



In vitro purgative effect of Ruellia praetermissa. Sceinf.ex.Lindau (Acanthaceae)  

Microsoft Academic Search

Methanol, ethylacetate and aqueous extracts of Ruellia praetermissa initiated spontaneous contractions in the quiescent and increased contraction on the electrically stimulated ileal strip at a concentration of 30 ?g\\/ml. The extracts produced concentration-related contractions both in amplitude and tone up till 750 ?g\\/ml with IC50 of 360 ?g\\/ml (methanol extract), 425 ?g\\/ml (ethylacetate extract) and 540 ?g\\/ml (aqueous extract). Acetylcholine

A. M Salah; A. B Dongmo; A Kamanyi; M Bopelet; W Vierling; H Wagner



Genetic variation in the response of the weed Ruellia nudiflora (Acanthaceae) to arbuscular mycorrhizal fungi  

Microsoft Academic Search

The main goal of this work was to test for plant genetic variation in the phenotypic plasticity response of the weed Ruellia nudiflora to arbuscular mycorrhizal (AM) fungi inoculation. We collected plants in the field, kept them under homogeneous conditions\\u000a inside a nursery, and then collected seeds from these parent plants to generate five inbred lines (i.e., genetic families).\\u000a Half

José Alberto Ramos-Zapata; María José Campos-Navarrete; Víctor Parra-Tabla; Luis Abdala-Roberts; Jorge Navarro-Alberto



A synopsis of Costa Rican Ruellia (Acanthaceae), with descriptions of four new species  

Microsoft Academic Search

We describe four new species of Ruellia from Costa Rica; three from the Osa Peninsula, Puntarenas province (R. exilis, R. mira, R. odorata), and one from the southwestern corner of San José province (R. norvegigratiosa). Ruellia matagalpae is reported as a new record for the country. New combinations are made in Ruellia for the two Costa Rican species of Blechum

Lucinda A. McDade; Erin A. Tripp



Hepatoprotective effects of the polysaccharide isolated from Tarphochlamys affinis (Acanthaceae) against CCl4-induced hepatic injury.  


This study was designed to investigate the protective effects of the polysaccharide isolated from Tarphochlamys affinis (PTA) against CCl4-induced hepatotoxicity in rats. Liver injury was induced in rats by the administration of CCl4 twice a week for 2 weeks. During the experiment, the model group received CCl4 only; the treatment groups received various drugs plus CCl4, whereas the normal control group received an equal volume of saline. Compared with the CCl4 group, PTA significantly decreased the activities of aspartate aminotransferase (AST), alanine aminotransferase (ALT) and alkaline phosphatase (ALP) in the serum and increased the activities of superoxide dismutase (SOD), glutathione peroxidase (GPx) in the liver. Moreover, the content of hepatic malondialdehyde (MDA) was reduced. Histological findings also confirmed the anti-hepatotoxic characterisation. In addition, PTA significantly inhibited the proinflammatory mediators, such as prostaglandin E2 (PGE2), inducible nitric oxide synthase (iNOS), cyclooxygenase-2 (COX-2), interleukin-6 (IL-6), tumour necrosis factor-? (TNF-?) and myeloperoxidase (MPO). Further investigation showed that the inhibitory effect of PTA on the pro-inflammatory cytokines was associated with the down-regulation of nuclear factor-kappa B (NF-?B). In brief, our results show that the protective effect of PTA against CCl4-induced hepatic injury may rely on its ability to reduce oxidative stress and suppress inflammatory responses. PMID:22975511

Lin, Xing; Liu, Xi; Huang, Quanfang; Zhang, Shijun; Zheng, Li; Wei, Ling; He, Min; Jiao, Yang; Huang, Jianchun; Fu, Shujie; Chen, Zhaoni; Li, Yongwen; Zhuo, Lang; Huang, Renbin



El Teatre Principal de Figueres: una història del dinou (1814-1902)  

Microsoft Academic Search

Aquest article és una aproximació a la idea, el projecte i l’execució de l’equipament\\u000apúblic més rellevant que Figueres duu del segle XIX i part del XX, juntament amb la Rambla. El significat d’aquesta construcció, excessiva per a una ciutat petita, va molt més enllà de l’edifici neoclàssic, ja que suposa una nova manera d’entendre l’urbanisme públic de la mà

Alfons Martínez i Puig



Modelo Juan XXIII, Santiago de los Caballeros, República Dominicana: Una asociación entre el gobierno y la sociedad civil  

Microsoft Academic Search

El presente trabajo describe el Modelo Juan XXIII: modelo establecido en un área urbana, con una historia de fuerte movilización comunitaria, una presencia institucional favorecedora del liderazgo comunitario y la participación, y un gobierno experimentando una estrategia de descentralización de la salud pública. Indaga si este programa ha producido los resultados tangibles para los 70,000 habitantes de las 24 barrios

Uli Locher



¿Son las políticas locales una buena estrategia para dinamizar el mercado de trabajo? Algunos elementos para el caso colombiano  

Microsoft Academic Search

Resumen: En períodos de bajo crecimiento económico, tiempos de recesión o crisis económica, implementar una política fiscal contra-cíclica puede ser una herramienta fundamental para crear empleo y dinamizar la economía. En Colombia, específicamente en las principales ciudades del país existe una posibilidad concreta para que los gobiernos locales, a través de incrementos del gasto de inversión, impacten positivamente en la

Diana Galvis G; Mauricio López Gonzalez



Relaciones interorganizacionales y el programa de las comunidades especiales de Puerto Rico: Una experiencia de \\  

Microsoft Academic Search

Este trabajo presenta un análisis de la exitosa experiencia del Programa de Comunidades Especiales de Puerto Rico de lucha contra la pobreza (2000-2004). El programa utilizó una estrategia de ¿gobierno conjunto¿ en que la coordinación inter-agencial y el trabajo inter-organizacional jugaron un papel estratégico. Se describe la estructura y la forma de operar del programa y se presenta una reflexión

José Sulbrandt



Surgimiento de irreversibilidad dinámica en sistemas cuánticos de muchos cuerpos: Una prueba usando resonancia magnética nuclear  

Microsoft Academic Search

La técnica de resonancia magnética nuclear permite crear una polarización local de no-equilibrio y posteriormente detectar su evolución. También es posible invenir el signo del hamihoniano dipolar efectivo y así revertir una dinámica aparentememe difusiva. generando un eco de polarización. Las mediciones en policrislales de (C~Hs)Mn(COh y de (CsHshFe mostraron ecos que se atenúan como función del tiempo tR transcurrido

Horacio M. Paslawski; Gonzalo Usaj; Rodrigo A. Iglesias


Valoración de impactos socio- ambientales del arbolado urbano: una aplicación a la ciudad de Santiago, Chile  

Microsoft Academic Search

Santiago de Chile es tercero en la lista de ciudades más contaminadas de Latinoamérica, después de Ciudad de México y Sao Paulo, por lo cual la valoración ambiental y social del arbolado urbano en este contexto es de vital importancia. Los proyectos de arbolado urbano ya sea en calles, plazas, parques u otras áreas verdes tienen como propósito, por una

Carmen L. De la Maz; Claudia L. Cerd



La intercoperación: una respuesta a las actuales demandas del cooperativismo agrario  

Microsoft Academic Search

Las cooperativas agrarias son entidades que a lo largo de la historia han demostrado una gran capacidad generadora de bienestar y riqueza para el mundo rural, constituyendo en muchas ocasiones el motor fundamental de la vida económica y social en numerosos territorios, a la vez que el principal instrumento empresarial al servicio de sus habitantes. Con todo, los importantes cambios




Una Mirada al Futuro: Doctrina, Estrategia, Nuevas Amenazas y el Rol del Poder Aéreo  

Microsoft Academic Search

Hemos delineado unas ideas que esperamos puedan servir para contribuir en la elaboración de la concepción Estratégica Aeroespacial y Nacional. La ocurrencia de conflictos de nuevas características que se suman a los tradicionales, hacen aún más compleja, la ya dinámica temática de la Defensa Aeroespacial Nacional. Nuestro trabajo no agota el tema ni la totalidad de las ideas relacionadas, pero

Horacio Matias Orefice


Landscape Terms and Place Names in the Trobriand Islands--The Kaile'una Subset  

ERIC Educational Resources Information Center

After a brief introduction to the topic the paper first gives an overview of Kilivila landscape terms and then presents the inventory of names for villages, wells, island points, reef-channels and gardens on Kaile'una Island, one of the Trobriand Islands in the Milne Bay Province of Papua New Guinea. The data on the meaning of the place names…

Senft, Gunter



Determinantes del precio de la vivienda en Santiago: Una estimación hedónica  

Microsoft Academic Search

Siguiendo la tradición de una extensa literatura de la economía urbana, desarrollada a partir de la base teórica propuesta por Rosen (1974), aquí se utiliza un modelo de precios hedónicos para analizar la determinación del precio de la vivienda (casas) en el mercado de Santiago. La estimación empírica del modelo permite explicar sobre el 70 por ciento de la varianza

Eugenio Figueroa; George Lever


El Mercado de Transporte Aéreo: Lecciones para Chile de una Revisión de la Literatura  

Microsoft Academic Search

En la industria de transporte aéreo en Chile, existe hoy libre ingreso a los mercados, libertad de precios y una mínima intervención del estado. Sin embargo, la evolución de la industria ha generado discusión y preocupación pública en los últimos años respecto a qué tan competitivo es el mercado de transporte doméstico de pasajeros. Preocupaciones y discusiones de política pública

Claudio Agostini



Specializzazione delle strategie ed eterogeneitad i una popolazione di firm in un mercato finanziario  

Microsoft Academic Search

Nei sistemi complessi quali sono i mercati finanziari sono note da tempo le leggi che regolano le grandezze macroscopiche come i rendimenti o la volatilita di uno stock. Queste leggi hanno carattere universale e non dipen- dono dal particolare mercato o periodo considerati e sono note in letteratura come fatti stilizzati. Queste grandezze sono pero il risultato di una inter-

Gabriella Vaglica; Fabrizio Lillo


Encendiendo una Llama. Bilingual Gifted and Talented Program: Overview, Identification of Students, and Instructional Approaches.  

ERIC Educational Resources Information Center

Three pamphlets describe facets of "Encendiendo Una Llama," a Hartford (Connecticut) demonstration program for bilingual gifted and talented students. An overview pamphlet summarizes key aspects of the model program: identification procedures, instructional services, teacher training, parent involvement, evidence of effectiveness, implementation…

Hartford Public Schools, CT.


In un batter d'occhio... quando per parlare basta una palpebra  

Microsoft Academic Search

Lo sguardo rivolto verso l'alto per comunicare un assenso, le palpebre semi chiuse per esprimere un no, la mente lucida ed acuta imprigionata in un corpo che non risponde ai suoi comandi, una tabella di carta con 21 lettere gialle e verdi e Gabriele diventa \\

Anno Accademico



Valoración económica del ruido: una aplicación a través del método de transferencia de beneficios  

Microsoft Academic Search

Este artículo tiene como objetivo realizar una aproximación a la valoración económica de los beneficios de la reducción del ruido generado por infraestructuras de telecomunicaciones en cuatro zonas urbanas del área metropolitana de la ciudad de Medellín (Colombia). Así, mediante el método de transferencia de beneficios, en un horizonte a perpetuidad, se obtuvo un valor económico de $79,40 millones para

Francisco Javier Correa Restrepo; Juan David Osorio Múnera; Bernardo Andrés Patiño Valencia



Herramientas Gerenciales para una mejor Administración Ambiental Aplicables a la Región Andina  

Microsoft Academic Search

La aplicación del modelo económico basado en el desarrollo sustentable como respuesta al deterioro ambiental, es una necesidad que en la actualidad no tiene discusión. Sin embargo, entre otras razones (factores económicos, políticos y sociales), no se ha podido llevar a cabo íntegramente porque hasta el momento, no se ha desarrollado un sistema que contemple la identificación de estrategias gerenciales,




Diseño del saneamiento de Urdaibai (País Vasco) bajo una perspectiva de preservación ambiental del litoral  

Microsoft Academic Search

Los sistemas de saneamiento unitarios, del mismo modo que cualquier obra de infraestructura dispuesta a soportar fenómenos naturales, pre- sentan, inevitablemente, una determinada probabilidad de fallo, igual, a la de que los efectos producidos por estos superen a los considerados en su diseño. Por tanto, el comportamiento general de los mismos sólo puede evaluarse en términos probabilísticos. Siendo la lluvia



La incertidumbre estructural en el problema de la sostenibilidad. Una panorámica  

Microsoft Academic Search

Al incorporar el aspecto humano (junto con el económico y medio ambiental), a un sistema que pretende ser sostenible, éste se convierte en un sistema complejo, reflexivo y emergente. La propiedad de la reflexividad supone la existencia de una incertidumbre que no puede reducirse de ningún modo, pero que es necesario gestionar si se pretende la sostenibilidad del sistema. Este

Estrella Bernal Cuenca




Microsoft Academic Search

La consideración de la temática ambiental en el espacio urbano, desde una perspectiva global es un fenómeno nuevo, al menos, en América Latina. Desde hace varias décadas, los esfuerzos por mejorar las condiciones ambientales en nuestras ciudades se limitaron a la construcción progresiva de sistema de captación de agua y transporte de aguas servidas, sistemas de recolección de basura, entre

Eduardo López Bastidas; Tania Goicochea Borrell



Competencia entre estímulos condicionales propioceptivos y exteroceptivos en una tarea de discriminación condicional  

Microsoft Academic Search

Se realizó un experimento con sujetos humanos de edades comprendidas entre los 7 y los 53 años en el que se utilizó un procedimiento de discriminación condicional con muestras compuestas formadas por estímulos exteroceptivos (figuras geométricas coloreadas) y propioceptivos (diferentes formas de señalar tales figuras). De esta forma, los sujetos fueron entrenados a emitir una conducta diferencial ante cada muestra

María Teresa Rodríguez García; Andrés García García; María Teresa; Gutiérrez Domínguez; Vicente Pérez Fernández; Cristóbal Bohórquez Zayas



Descubrimiento de una nueva asociación OB en la Gran Nube de Magallanes  

NASA Astrophysics Data System (ADS)

En base a observaciones CCD de la binaria eclipsante Sk-67o105 llevadas a cabo en el CASLEO, se ha descubierto una nueva asociación OB a la cual dicha estrella pertenece. Este hallazgo pone en duda la existencia de las llamadas estrellas O de campo, sugiriendo que éstas podrían ser miembros de asociaciones aún no descubiertas.

Ostrov, P. G.; Morrell, N.; Niemela, V.


Year One Evaluation of "Encendiendo Una Llama" Bilingual Gifted and Talented Program. Report 80-12.  

ERIC Educational Resources Information Center

The document reports activities of "Encendiendo Una Llama," a bilingual gifted and talented program serving 60 students in grades K through 6 in a school day resource room component or in an after school program. Twelve program objectives are outlined in terms of proposed activities, proposed evaluation, actual results, and interpretation of…

Barstow, Daniel; Roby, Wallace R.



Microsoft Academic Search

RESUMEN La crisis generalizada a que nos vemos abocados parece obedecer en g ran parte a las múltiples deficiencias que presenta por un lado el sistema educativo y por otro la teoría económica, esto se refleja en el comportamiento del sistema económico sometido a la aplicación de políticas que pretenden dar solución a problemas de una gran complejidad. Una alternativa




Microsoft Academic Search

Resumen. En este trabajo se analiza el efecto ejercido por tres tipos de recubrimientos superficiales sobre las prestaciones frente al desgaste y la fatiga de una aleación de aluminio 7075, en estado T6, solubilización y maduración al pico de máxima resistencia. Los recubrimientos analizados fueron la deposición mediante la técnica de PVD de una capa de bisulfuro de molibdeno dopada

D. González; M. Brizuela; G. Atxaga; A. M. Irisarri; B. Zamorano


Una silenziosa \\  

Microsoft Academic Search

A silent disease: our patients' low health literacy levels Health literacy is defined as the capacity to obtain, process and understand basic health information and services needed to make appropriate health decisions. Health literacy levels may be important mediators of the relationship between socioeconom- ic inequalities and health disparities. Adults with low health literacy levels are more often hospitalized, use

Maria Francesca Siracusano; Stefania Manetti


Local adaptation of Ruellia nudiflora (Acanthaceae) to biotic counterparts: complex scenarios revealed when two herbivore guilds are considered.  


This study evaluated whether the herb Ruellia nudiflora is locally adapted to a specialist insect seed predator (SP) and insect folivores, and if plant local adaptation (LA) to the former is more likely. A reciprocal transplant experiment was conducted using three sites in Yucatan (Mexico) (n = 864 plants). A third of the plants of each origin were placed at each site, and we recorded the following during a 9-month period: fruit number, leaf damage, and fruits attacked by SP. Results indicated lack of plant LA for all the variables measured. Instead, seed predation was c. 100% greater for native plants at one study site, suggesting insect LA or plant maladaptation; folivory was homogeneous across sites/origins. Based on these results, we discuss differences in the potential each herbivore guild has to promote plant LA, as well as divergent evolutionary outcomes of plant-herbivore interactions across sites. PMID:19796082

Ortegón-Campos, I; Parra-Tabla, V; Abdala-Roberts, L; Herrera, C M



Pollination ecology of Ruellia angustiflora (Ness) Lindau ex Rambo (Acanthaceae) in the Serra da Bodoquena, Mato Grosso do Sul, Brazil  

Microsoft Academic Search

In Brazil, studies focusing on reproductive biology and aspects of pollination in the genus Ruellia have demonstrated common characteristics such as pollination by hummingbird, the predominance of self-fertility and spontaneous self-pollination. The objectives of this study were to describe the floral biology, nectar production, the reproductive system, the effect of pollination intensity and flowering phenology of Ruellia angustiflora, as well

Rogério Rodrigues Faria; Andréa Cardoso Araujo



Seed germination and seedling survival traits of invasive and non-invasive congeneric Ruellia species (Acanthaceae) in Yucatan, Mexico  

Microsoft Academic Search

We compared requirements for seed germination and seedling establishment for Ruellia nudiflora, an invasive species in Yucatan, Mexico with those of the congeneric non-invasive R. pereducta. Germination and seedling survival rates were higher for R. nudiflora than for R. pereducta under high light. Additionally, the ranges of temperature and water potential that allow germination for R. nudiflora were much broader than those of R. pereducta.

J. Carlos Cervera; Víctor Parra-Tabla



Local adaptation of Ruellia nudiflora (Acanthaceae) to biotic counterparts: complex scenarios revealed when two herbivore guilds are considered  

Microsoft Academic Search

This study evaluated whether the herb Ruellia nudiflora is locally adapted to a specialist insect seed predator (SP) and insect folivores, and if plant local adaptation (LA) to the former is more likely. A reciprocal transplant experiment was conducted using three sites in Yucatan (Mexico) (n = 864 plants). A third of the plants of each origin were placed at




Antisecretory Action of the Extract of the Aerial Parts of Eremomastax speciosa (Acanthaceae) Occurs through Antihistaminic and Anticholinergic Pathways.  


Objective. The objective of this study was to find out the possible antiulcer mechanism of action of Eremomastax speciosa. Method. Carbachol- and histamine-induced hypersecretion, associated with the pylorus ligation technique, were used in rats. Gastric mucosal ulceration, mucus production, pH, gastric volume, and acidity were measured. Results. Histamine and carbachol raised gastric acidity to 86.50 and 84.80?mEq/L, respectively, in the control rats, and the extracts (200?mg/kg) reduced gastric acidity to 34.60 and 39.00?mEq/L, respectively. Intraduodenal aqueous extract (400?mg/kg) in histamine- and carbachol-treated rats produced significant (P < 0.001) decreases in acid secretion to 28.50 and 28.80?mEq/L, respectively, and 100 percent inhibition of gastric ulceration. Augmented histamine-induced gastric acid secretion (90.20?mEq/L) was significantly reduced to 52.60 and 27.50?mEq/L by the 200 and 400?mg/kg doses of the aqueous extract, respectively. The extract significantly reduced (P < 0.001) the volume of gastric secretion and significantly increased mucus production. The ulcer inhibition potential of the extract significantly dropped to 25-44% (oral extract) and to 29-37% (duodenal extract) in carbachol/indomethacin-treated rats. Conclusion. The aqueous extract of E. speciosa has both cytoprotective and antisecretory effects. The antisecretory effect may involve a mechanism common to both cholinergic and histaminergic pathways. PMID:24695819

André Perfusion, Amang; Tan, Paul V; Ernestine, Nkwengoua; Barthélemy, Nyasse



Influence of multiple factors on plant local adaptation: soil type and folivore effects in Ruellia nudiflora (Acanthaceae)  

Microsoft Academic Search

Different environmental factors can have contrasting effects on the extent of plant local adaptation (LA). Here we evaluate\\u000a the influence of folivory and soil type on LA in Ruellia nudiflora by performing reciprocal transplants at two sites in Yucatan (Mexico) while controlling for soil source and folivory level.\\u000a Soil samples were collected at each site and half of the plants

Ilka Ortegón-Campos; Luis Abdala-Roberts; Víctor Parra-Tabla; J. Carlos Cervera; Denis Marrufo-Zapata; Carlos M. Herrera


Evaluation of Antiangiogenic Effect of the Leaves of Justicia gendarussa (Burm. f ) (Acanthaceae) by Chrio Allontoic Membrane Method  

Microsoft Academic Search

Problem statement: Angiogenesis involves the formation of new blood vessels from pre- existing blood vessels plays a crucial role in path ological processes such as diabetic retinopathy, arthritis and in the growth of solid tumors. Numero us reports had pointed out to the crucial role of neovascularization in the malignancy of tumors and other angiogenesis dependant diseases. Antiangiogenic therapy which

K. Periyanayagam; B. Umamaheswari; L. Suseela; M. Padmini; M. Ismail



Observaciones del disco solar y de una protuberancia quiescente en radiación ultravioleta  

NASA Astrophysics Data System (ADS)

Observaciones del disco solar y de una protuberancia quiescente en el rango de longitudes de onda ultravioleta fueron obtenidas con el instrumento CDS (Coronal Diagnostic Spectrograph) y SUMER (Solar Ultraviolet Measurements of emitted radiation) a bordo de la sonda SOHO. El propósito es investigar las velocidades macroscópicas de varias especies metálicas que se observan tanto en el disco solar como en el plasma de las protuberancias. Para calcular las velocidades del disco solar aplicamos una técnica mixta para modelar la distribución de estructuras en UV en el Sol quieto. Las velocidades macroscópicas en las protuberancias se calcularon a partir de los corrimientos Doppler en cada línea espectral y luego se tomaron las del disco solar como referencia. Obtuvimos valores absolutos para las velocidades macroscópicas entre 5 y 40 km/seg. También detectamos comportamientos diferentes en las velocidades de las protuberancias en el centro con respecto a los bordes.

Cirigliano, D.; Vial, J.-C.; Rovira, M.


El doctor Varmus dirigirá una institución "inigualable", afirma el director del NCI, doctor John Niederhuber

En un mensaje dirigido al personal del Instituto Nacional del Cáncer (NCI) y a quienes se interesan por la oncología, el doctor John Niederhuber, director del NCI, aplaude el nombramiento de Harold Varmus y afirma que esta designación le "dará al NCI un liderazgo fuerte no solo en la institución sino mas allá de ella, así como una voz muy respetada en el Congreso, que abogue por los recursos que son tan necesarios para sostener la misión del Instituto.


Patologies d'Ornamentals Associades a una Gestió i Pràctiques Incorrectes de Jardineria  

Microsoft Academic Search

Molt sovint, les patologies que pateixen la vegetació ornamental no es deuen a la casuística i a la mala sort. En un elevat percentatge, l'adopció d'una gestió inadequada i la pràctica d'activitats incorrectes, bé des d'un principi, com al llarg del temps, són la causa i l'inici del problema. Llavors, tant la vegetació arbrada, com l'arbustiva, palmeres, gespes i planta

Josep M Riba



Perspectivas de la economía española para 1998-1999: estabilidad en el crecimiento a niveles superiores a la media europea y con una tasa de paro muy elevada  

Microsoft Academic Search

Los datos de la contabilidad nacional trimestral (CNTR) correspondientes al tercer trimestre de 1997 señalan una fuerte desaceleración del producto interior bruto, que ha pasado de una tasa de crecimiento trimestral del 1,13% en el primer trimestre a una del 0,64 % en el tercero. Estos datos son provisionales y a la vista de la evolución de bastantes indicadores económicos

Antoni Espasa; J. Manuel Martínez


Heterochromatin heterogeneity in Hypostomus prope unae (Steindachner, 1878) (Siluriformes, Loricariidae)from Northeastern Brazil  

PubMed Central

Abstract Cytogenetic analyses using C-banding and chromosomal digestion by several restriction enzymes were carried out in four populations (named A, B, C and D) of Hypostomus prope unae (Loricariidae, Hypostominae) from Contas river basin, northeastern Brazil. These populations share 2n=76 and single NORs on the second metacentric pair but exclusive karyotype forms for each locality. Populations A and B presented conspicuous terminal and interstitial heterochromatic blocks on most of acrocentric chromosomes and equivalent to NORs with differences in both position and bearing pair. Population D showed evident marks at interstitial regions and interspersed with nucleolar region while population C presented interstitial and terminal heterochromatin segments, non-coincident with NORs. The banding pattern after digestion with the endonucleases Alu I, Bam HI, Hae III and Dde I revealed a remarkable heterogeneity within heterochromatin, allowing the identification of distinctive clusters of repeated DNA in the studied populations, besides specific patterns along euchromatic regions. The analysis using restriction enzymes has proved to be highly informative, characterizing population differences and peculiarities in the genome organization of Hypostomus prope unae.

Bitencourt, J.A.; Affonso, P.R.A.M.; Giuliano-Caetano, L.; Dias, A.L.



[Il ruolo del cervelletto nella depressione unipolare e bipolare: una rassegna delle principali evidenze neurobiologiche].  


riassunto. Evidenze derivanti da numerosi studi condotti sia su pazienti affetti da patologie cerebellari sia su soggetti sani suggeriscono che il cervelletto eserciti, oltre a un ruolo ormai ben definito nel controllo e nella regolazione delle funzioni motorie, una significativa attività di modulatore del tono dell'umore, del comportamento e delle funzioni cognitive. In questo lavoro di revisione abbiamo passato in rassegna tutti quegli studi di neuroimaging volti a indagare la presenza di alterazioni cerebellari sia morfologiche sia funzionali in pazienti affetti da disturbo bipolare (DB) e disturbo depressivo maggiore (DDM), ipotizzando l'esistenza di un meccanismo fisiopatologico alla base di questi disturbi, che coinvolga, almeno in parte, il cervelletto. Allo stesso scopo, sono stati esaminati anche quegli studi post mortem che indagavano la presenza di alterazioni cellulari e molecolari a partire da campioni di tessuto cerebellare, per esempio alterazioni delle proteine mitocondriali, della tirosin-chinasi B e del brain-derived neurotrophic factor (BDNF), del fattore di trascrizione SP4, della proteina fibrillare acida della glia (GFAP). In totale sono stati esaminati 28 studi, 12 inerenti le alterazioni morfologiche e funzionali del cervelletto nel DB, 13 inerenti le alterazioni morfologiche e funzionali del cervelletto nel DDM e 4 inerenti le alterazioni cerebellari post mortem in entrambi i disturbi. Dal nostro lavoro di revisione, in linea con quanto presente nella letteratura internazionale, emerge l'interessante ipotesi che il cervelletto funzioni come un "pacemaker emotivo" e che quindi una sua lesione potrebbe tradursi nell'incapacità dell'individuo di rimanere in equilibrio sulla sottile linea dell'eutimia, giustificando in questo modo la comparsa di profonde oscillazioni emotive sia sul versante depressivo sia su quello maniacale. PMID:25000888

Minichino, Amedeo; Bersani, Francesco Saverio; Trabucchi, Guido; Albano, Gabriella; Primavera, Martina; Delle Chiaie, Roberto; Biondi, Massimo



In para totale...una cosa da panico...sulla lingua dei giovani in Italia (In para totale...una cosa da panico...The Language of Young People in Italy).  

ERIC Educational Resources Information Center

Describes and analyzes the language of young people in Italy today. Particular focus is on the expressions using "para" (e.g., "in para totale" = to be very bored or worried) and the phrase "una cosa da panico" (something terrible or its opposite something wonderful). (CFM)

Marcato, Carla




Microsoft Academic Search

La presente investigación pretende reflejar una plataforma teórica-metodológica en materia de cadenas agroalimentarias, que plantea la existencia de dos ámbitos de análisis: (a) la cadena agroalimentaria y sus correspondientes eslabones y agentes; y (b) las unidades territoriales en las cuales se localizan los diversos agentes productivos que forman parte de la cadena agroalimentaria. Referente al proceso metodológico, y con la

Francisco Bijarro Hernández; David López Cantú; Juan Carlos Gutiérrez Hernández; José Erik Villado Mejía



Una Metodología para Ajustar y Compensar las Diferencias de Riesgo entre el Sistema Público y Privado de Salud en Chile  

Microsoft Academic Search

En el marco conceptual de seguros de salud y ajuste de riesgo y a la luz de la experiencia internacional en Fondos de Compensación de Riesgos, este documento explora el problema del «descreme» que afecta al sistema de seguros Chileno. Se presenta una metodología para estimar diferencias de riesgo entre el sector público y privado de salud en Chile y

Verónica Vargas; Camilo Cid; Mauricio Matus; Iris Delgado; José Miguel Sánchez; Beatriz Heyermann; José Angulo


El Instituto Nacional del Cáncer de EE. UU. y la República del Perú firman una Declaración de Intención

El Instituto Nacional del Cáncer y la República del Perú firmaron una declaración de intención para compartir el interés en fomentar la investigación biomédica de oncología, basándose en la colaboración mutua de ambas entidades, así como el objetivo común de educar y capacitar la futura generación de científicos y clínicos en investigación oncológica.


Evaluación de políticas públicas para la reducción de la criminalidad en Medellín: una aproximación con dinámica de sistemas  

Microsoft Academic Search

Medellín ha sido una de las ciudades más violentas del mundo, pero la criminalidad ha venido reduciéndose en los últimos años. La continuidad del sendero descendiente depende de la efectividad de las políticas públicas. Esta investigación evalúa políticas públicas, tanto preventivas como punitivas, usando un modelo en dinámica de sistemas que considera la carrera criminal y la teoría económica del

Santiago Arango; John Jairo Prado; Isaac Dyner



A quencher-free molecular beacon design based on pyrene excimer fluorescence using pyrene-labeled UNA (unlocked nucleic acid).  


A quencher-free molecular beacon capable of generating pyrene excimer fluorescence has been constructed using strategically positioned pyrene-UNA monomers. Hybridization of a fully complementary RNA target was accompanied by a pyrene excimer emission increase of more than 900%, and detection of RNA in living cells was demonstrated. PMID:23693070

Karlsen, Kasper K; Okholm, Anders; Kjems, Jørgen; Wengel, Jesper



1981-82 Project Evaluation for Encendiendo Una Llama: A Program for Bilingual Gifted and Talented Students.  

ERIC Educational Resources Information Center

The operation of "Encendiendo Una Llama," Hartford, Connecticut's program for bilingual gifted students, was evaluated for the 1981-82 school year. A total of 173 gifted children of limited English proficiency in grades 3 through 6 were served by the program at four locations. The program, staff, objectives, and target population are described.…

Roby, Wallace


La realidad de la adquisición del lenguaje oral y escrito en una muestra de escuelas del sector sur de Santiago  

Microsoft Academic Search

Resumen  El presente trabajo da a conocer los resultados de un estudio realizado con niños asistentes a primer año de enseñanza básica\\u000a en escuelas municipalizadas de Santiago de Chile, pertenecientes al nivel sociocultural deprivado. El grupo estaba compuesto\\u000a por niños de ambos sexos, con una edad promedio de 6 años 8 meses. Los niños fueron medidos al comienzo y al final

Carmen Díaz Oyarce; Elena Alvarez-Salamanca Mujica



Desarrollo sustentable participativo en una cuenca hidrográfica de montaña. Bosque Modelo Jujuy, Provincia de Jujuy, Noroeste Argentino  

Microsoft Academic Search

Se implementa, desde 1999, un programa de gestión de recursos naturales, tomando como unidad de manejo la cuenca del río Perico - Manantiales -150.000 ha, tributaria del río Grande-Lavayén-, que comprende biomas de Yungas, Altoandino y Chaco Serrano . Es una cuenca montañosa co n ríos torrenciales (altitudes 550-5.600 msnm) propensa a erosión hídrica, eólica y criogénica por causas naturales

Virginia Outon; Ralf Schillinger; Pedro Williams; Rolando Braun-Wilke; Guillermina Díaz



Art pop i curtmetratges a una biblioteca penitenciària: tallers de dinamització cultural a la Biblioteca del Centre Penitenciari de Joves de Barcelona  

Microsoft Academic Search

Es descriuen i s'analitzen dues activitats d'extensió cultural dutes a terme a la Biblioteca del Centre Penitenciari de Joves de Barcelona a partir d'una col·laboració externa. S'inclou una descripció del Centre, de la Biblioteca i del perfil d'usuari a qui s'han dirigit les activats. Seguidament, es resumeixen els diferents passos duts a terme per a la confecció de les activitats,

Laia Castell Padilla; Josep M. Pallisé Carreté; Núria Pedrola i Guillén; Cristina Tomàs i Humbert; Lola Burgos Oliván



Environmental control of reproductive phenology and the effect of pollen supplementation on resource allocation in the cleistogamous weed, Ruellia nudiflora (Acanthaceae)  

PubMed Central

•?Background and Aims Mixed reproductive strategies may have evolved as a response of plants to cope with environmental variation. One example of a mixed reproductive strategy is dimorphic cleistogamy, where a single plant produces closed, obligately self-pollinated (CL) flowers and open, potentially outcrossed (CH) flowers. Frequently, optimal environmental conditions favour production of more costly CH structures whilst economical and reliable CL structures are produced under less favourable conditions. In this study we explore (1) the effect of light and water on the reproductive phenology and (2) the effect of pollen supplementation on resource allocation to seeds in the cleistogamous weed Ruellia nudiflora. •?Methods Split-plot field experiments were carried out to assess the effect of shade (two levels: ambient light vs. a reduction of 50 %) and watering (two levels: non-watered vs. watered) on the onset, end and duration of the production of three reproductive structures: CH flowers, CH fruit and CL fruit. We also looked at the effect of these environmental factors on biomass allocation to seeds (seed weight) from obligately self-pollinated flowers (CL), open-pollinated CH flowers and pollen-supplemented CH flowers. •?Key Results CH structures were produced for a briefer period and ended earlier under shaded conditions. These conditions also resulted in an earlier production of CL fruit. Shaded conditions also produced greater biomass allocation to CH seeds receiving extra pollen. •?Conclusions Sub-optimal (shaded) conditions resulted in a briefer production period of CH structures whilst these same conditions resulted in an earlier production of CL structures. However, under sub-optimal conditions, plants also allocated more resources to seeds sired from CH flowers receiving large pollen loads. Earlier production of reproductive structures and relatively larger seed might improve subsequent success of CL and pollen-supplemented CH seeds, respectively.

Munguia-Rosas, Miguel A.; Parra-Tabla, Victor; Ollerton, Jeff; Cervera, J. Carlos



Electrochemistry and in situ scanning tunnelling microscopy of pure and redox-marked DNA- and UNA-based oligonucleotides on Au(111)-electrode surfaces.  


We have studied adsorption and electrochemical electron transfer of several 13- and 15-base DNA and UNA (unlocked nucleic acids) oligonucleotides (ONs) linked to Au(111)-electrode surfaces via a 5'-C6-SH group using cyclic voltammetry (CV) and scanning tunnelling microscopy in aqueous buffer under electrochemical potential control (in situ STM). 2,2',6',2''-Terpyridine (terpy) onto which the transition metal ions Fe(2+/3+), Os(2+/3+) and Ru(2+/3+) could be coordinated after UNA monolayer formation was attached to UNA via a flexible linker. The metal centres offer CV probes and in situ STM contrast markers, and the flexible UNA/linker a potential binder for intercalation. CV of pure and mercaptohexanol diluted ON monolayers displayed reductive desorption signals but also, presumably capacitive, signals at higher potentials. Distinct voltammetric signals arise on metal binding. Those from Ru-binding are by far the strongest and in accord with multiple site Ru-attachment. In situ STM disclosed molecular scale features in varying coverage on addition of the metal ions. The Ru-derivatives showed a bias voltage dependent broad maximum in the tunnelling current-overpotential correlation which could be correlated with theoretical frames for condensed matter conductivity of redox molecules. Together the data suggest that Ru-units are bound to both terpy and the UNA-DNA backbone. PMID:23073185

Hansen, Allan G; Salvatore, Princia; Karlsen, Kasper K; Nichols, Richard J; Wengel, Jesper; Ulstrup, Jens



Modelos teóricos que nos ayudan a comprender el gobierno de las sociedades cooperativas, una apuesta por el enfoque de los stakeholders  

Microsoft Academic Search

En la actualidad, el entorno competitivo es cada vez más incierto y complejo. Las características de los mercados actuales hacen que sea cada vez más difícil conseguir una ventaja competitiva sostenible en el tiempo para la empresa, por lo que hay que innovar en formas de gestión y de gobierno para ser competitivo. De esta manera, se está produciendo un

Cristina Pedrosa Ortega



L’arteriopatia perifèrica i la seva relació amb la qualitat de vida en una població amb factors de risc cardiovascular  

Microsoft Academic Search

Introducció. Els pacients amb claudicació intermitent presenten elevada incidència de malaltia coronària, però freqüentment són asimptomàtics Objectiu. Determinar la prevalença d’Arteriopatia Perifèrica Silent en una població amb Factors de Risc Cardiovascular (FRCV) i la forma de presentació (insuficiència o calcificació arterial). Analitzar repercussió de la malaltia arterial perifèrica sobre la percepció de qualitat de vida relacionada amb la salut (CVRS)

Bobé Armant Francesc; Buil Arasanz Maria Eugenia; Trubat Muñoz Griselda; Allué Buil Ana Isabel; Morro Grau Amàlia; Bladé Creixenti Jordi




Microsoft Academic Search

La necesidad de recursos privados entre las ENL, tanto para su sostenimiento como para la realización de su labor requiere de estrategias organizativas cada vez más eficaces, por lo que el estudio del fundraising y su eficacia suscita un gran interés. En este trabajo, y basándonos en las conclusiones de estudios previos, pretendemos analizar la relación e influencia de una

M. B. Gutiérrez Villar; R. A. Araque Padilla; M. J Montero Simó



Los ?-agonistas adrenérgicos como modificadores metabólicos y su efecto en la producción, calidad e inocuidad de la carne de bovinos y ovinos: una revisión  

Microsoft Academic Search

Resumen. Los ?-agonistas adrenérgicos (?AA) se han utilizado en la producción animal, incluidos los rumiantes, propiciando una The ?-adrenergic Agonists as Metabolic Modifiers and their Effect on Production, Quality and Innocuousness of Beef Cattle and Sheep Meat: a Review Abstract. The ?-adrenergic agonists (?AA), improve animal production because they manipulate the efficiency of food use, affecting carcass characteristics and the

Ignacio A. Domínguez-Vara; Jaime Mondragón-Ancelmo; Manuel González Ronquillo; Félix Salazar-García; José Luis Bórquez-Gastelum; Andrés Aragón-Martínez



Auditoría al sistema de gestión ambiental de una cementera para determinar los porcentajes de adecuación a la norma venezolana covenin - iso 14001:2005  

Microsoft Academic Search

El presente trabajo consiste en la combinación de técnicas de evaluación propias de estudios ambientales con procedimientos de auditoría tradicionales, con el objetivo de auditar el Sistema de Gestión Ambiental (SGA) de una empresa cementera venezolana llamada Cementos Carora C. A. siguiendo los lineamientos de la norma venezolana COVENIN ISO 14001:2005 para determinar los porcentajes de adecuación a la norma.

Alexis Colmenárez; Anoushka Colménarez



Normas Chilenas para el MACI: Una Integración de Criterios Categoriales y Dimensionales1 Chilean Norms for MACI: An Integration of Categorical and Dimensional Criteria  

Microsoft Academic Search

Resumen Este estudio desarrolló normas chilenas para el Inventario Clínico para Adolescentes de Millon (MACI) utilizando una muestra de baremación diferenciada por sexo y dicotomizada en dos grupos, no-consultantes (200 hombres y 206 mujeres) y consultantes (212 hombres y 189 mujeres), que respondió el MACI y el MMPI-A. Con los datos MACI se desarrolló un conjunto de análisis estadísticos de

Eugenia V. Vinet



Enfoques de programación matemática fuzzy multiobjetivo para la planificación operativa del transporte en una cadena de suministro del sector del automóvil = Fuzzy Multiobjective Mathematical Programming Approaches for Operational Transport Planning in an Automobile Supply Chain  

Microsoft Academic Search

En este trabajo se presenta un modelo de programación matemática fuzzy multiobjetivo para la planificación del transporte a nivel operativo en una cadena de suministro. Los objetivos del modelo propuesto son la minimización del número de camiones utilizados y del inventario total, considerando como parámetro borroso las capacidades de los vehículos empleados. Se propone una metodología de resolución para transformar

Manuel Díaz-Madroñero; David Peidro; Josefa Mula; Francisco J. Ferriols



Estudio de los NIH revela que un resultado negativo de la prueba del VPH es un mejor predictor de un riesgo bajo de cáncer de cuello uterino que una prueba de Pap negativa

De acuerdo con un estudio en el que participaron más de un millón de mujeres, los investigadores del NCI han determinado que el resultado negativo de una prueba para la detección del VPH proporciona mayor certeza o seguridad frente a riesgos futuros de cáncer de cuello uterino que una prueba de Pap.


"Una Luna Brilla."  

ERIC Educational Resources Information Center

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)

Teaching Music, 2002



Psicofarmacología: Una aproximación histórica  

Microsoft Academic Search

Title: Psychopharmacology: A historical approach. Abstract: Psychopharmacology can be defined as a scientific discipline that studies drugs able to modify the behaviour and the mental function through its action on the neuroendocrine system. Pharmacology, bio- chemistry, psychiatry and psychology share their interest for this multidis- ciplinary field of knowledge, devoted to the analysis of the substances that alter those functions

Carmen Torres Bares; Dolores Escarabajal Arrieta




PubMed Central

El Programa CITI (Collaborative Institutional Training Initiative) es un curso basado en Internet y desarrollado por voluntarios, que brinda material educacional sobre protección de sujetos humanos en investigaciones biomédicas y de conducta, buenas prácticas clínicas, conducta responsable de la investigación y trato humanitario a animales de laboratorio. Es un esfuerzo conjunto del Fred Hutchinson Cancer Research Center y la Universidad de Miami. Con la colaboración de expertos locales, gran parte del contenido se ha adaptado para América Latina, se ha traducido al español y portugués y se han establecido acuerdos de colaboración con instituciones especializadas en bioética en Chile, Brasil, Costa Rica y Perú. Los autores presentan una metodología accesible para la capacitación en ética de la investigación y una justificación de su uso y difusión en América Latina

Litewka, Sergio; Goodman, Kenneth; Braunschweiger, y Paul



Selective biocatalytic acylation studies on 5'-O-(4,4'-dimethoxytrityl)-2',3'-secouridine: an efficient synthesis of UNA monomer.  


Lipozyme(®) TL IM (Theremomyces lanuginosus lipase immobilized on silica) in toluene catalyzes the acylation of the 2'-OH over the 3'-OH group in 5'-O-(4,4'-dimethoxytrityl)-2',3'-secouridine (5'-O-DMT-2',3'-secouridine) in a highly selective fashion in moderate to almost quantitative yields. The turn over during benzoyl transfer reactions mediated by vinyl benzoate or benzoic anhydride was faster than in acyl transfer reactions with vinyl acetate or C(1) to C(5) acid anhydrides; except in the case of butanoic anhydride. The 2'-O-benzoyl-5'-O-DMT-2',3'-secouridine obtained by Lipozyme(®) TL IM catalyzed benzoylation of 5'-O-DMT-2',3'-secouridine was successfully converted into its 3'-O-phosphoramidite derivative in satisfactory yield, which is a building block for the preparation of oligonucleotides containing the uracil monomer of UNA (unlocked nucleic acid). PMID:23215547

Singh, Sunil K; Reddy, L Chandrashekhar; Srivastava, Smriti; Olsen, Carl E; Sanghvi, Yogesh S; Langkjær, Niels; Wengel, Jesper; Parmar, Virinder S; Prasad, Ashok K



Review of antiviral and immunomodulating properties of plants of the Peruvian rainforest with a particular emphasis on Una de Gato and Sangre de Grado.  


Viral diseases, including emerging and chronic viruses, are an increasing worldwide health concern. As a consequence, the discovery of new antiviral agents from plants has assumed more urgency than in the past. A number of native Amazonian medicines of plant origin are known to have antimicrobial and anti-inflammatory activity, although only a few have been studied for their antiviral properties and immunomodulating effects. Those most studied include: Sangre de Grado (drago) (Croton lechleri) in the Euphorbiaceae family and Una de Gato (Uncaria tomentosa) in the Rubiaceae family. This article reviews the chemical composition, pharmacological properties, state of current research, clinical use, and potential antiviral and immunomodulating activity of these and other plants from the Peruvian Amazon. PMID:11804547

Williams, J E




Microsoft Academic Search

After the Cold War, the process of internationalization evolves towards globalization in the post-capitalistic society, where knowledge is considered the most critical resource to create wealth. Understanding globalization as an interconnected process among financial, economic, social, political, and cultural elements provides the opportunity to any country to develop itself by eliminating its geographic boundaries.




A'Una ("Let's Go!")  

ERIC Educational Resources Information Center

The guide, intended to aid students (grades four and above) in making their bodies a good home for their spirit, provides a variety of athletic activities and traditional Indian recipes for use in the classroom or in cultural programs. Apart from running (the major American Indian means of maintaining physical fitness), instructions are given for…

Brescia, Bill


Filling the gap in LNA antisense oligo gapmers: the effects of unlocked nucleic acid (UNA) and 4'-C-hydroxymethyl-DNA modifications on RNase H recruitment and efficacy of an LNA gapmer.  


Stability against nucleases, affinity for the targeted mRNA and the ability to recruit RNase H are prerequisites for antisense oligonucleotide (AON) applications where gene expression knockdown is required. Typically chimeric gapmer AON designs are used with a central continuous stretch of RNase H recruiting nucleotides (e.g. phosphorothioate DNA), flanked by affinity and stability-enhancing modified nucleotides. However, many types of nucleotide modifications in the central DNA gap can disturb RNase H function. Here we present studies into two different types of nucleotide modifications, a flexible acyclic RNA analog named unlocked nucleic acid (UNA) and 4'-C-hydroxymethyl-DNA in the gap of an LNA (locked nucleic acid) flanked gapmer. We compared the efficacy of mRNA degradation by the gap modified LNA antisense gapmers in cell-free assays and cultured cells. This study shows that both UNA and 4'-C-hydroxymethyl-DNA gap insertions are compatible with RNase H activity when used sparingly. However, multiple 4'-C-hydroxymethyl-DNA modifications are better tolerated by RNase H than multiple UNA modifications in the gap. Furthermore, this report shows that LNA gapmer AONs with multiple 4'-C-hydroxymethyl-DNA moieties in the gap can mediate target knockdown in vivo. PMID:19603119

Fluiter, Kees; Mook, Olaf R F; Vreijling, Jeroen; Langkjaer, Niels; Højland, Torben; Wengel, Jesper; Baas, Frank



Invertebrate fauna associated with Torpedograss, Panicum repens (Cyperales: Poaceae), in Lake Okeechobee, Florida, and prospects for biological control  

SciTech Connect

Torpedograss, Panicum repens L., is an adventive, rhizomatous grass species that has become an invasive weed of terrestrial, wetland, and aquatic environments in tropical and subtropical regions worldwide. Until recently, strategies for controlling torpedograss in the USA have focused almost exclusively on mechanical and chemical methods, either alone or in combination, with varied results. A survey of the arthropods and nematodes currently associated with the plant in Lake Okeechobee, Florida, was conducted as part of a feasibility study to determine whether torpedograss is an appropriate target for a classical biological control program. Overall, approximately 4,000 arthropods and 400 nematode specimens were collected. Sweep, clipped vegetation, and soil core samples were dominated by representatives of the arthropod orders Hemiptera, Hymenoptera, Diptera, and Acari. Lesion nematodes of the genus Pratylenchus were commonly associated with the roots of torpedograss. None of the organisms collected were torpedograss specialists. Although classical biological control of torpedograss is feasible based on the extent of the infestation, economic losses, resistance to conventional controls, and the report of a potentially host specific natural enemy in India, the botanical position of this grass weed will require a formal risk assessment before proceeding with a classical biological control program. (author) [Spanish] La conota, Panicum repens L., es una especie foranea de pasto que produce rizomas que ha convertido en ser una maleza invasora de ambientes terrestres, pantanosos y acuaticos en regiones tropicales y subtropicales en todo el mundo. Hasta hace un tiempo reciente, las estrategias para controlar conota en los EEUU eran enfocadas casi exclusivamente en los metodos mecanicos y quimicos, solos o en combinacion, con resultados variables. Un muestreo de los artropodos y nematodos asociados corrientemente con esta planta en el Lago de Okeechobee, Florida, fue realizado como parte de un estudio de factibilidad para determinar si conota es una candidata apropiada para un programa de control biologico clasico. En general, especimenes de aproximadamente unos 4,000 artropodos y unos 400 nematodos fueron recolectados. Muestras recolectadas pasando una red sobre vegetacion mezclada, cortando la vegetacion y tomando centros del suelo fueron dominados por representantes de artropodos de los ordenes de Hemiptera, Hymenoptera, Diptera, y Acari. Nematodos en el genero Pratylenchus, que causan lesiones sobre tejido, fueron asociados regularmente con las raices de conota. Ninguno de los organismos recolectados eran especialistas sobre conota. Aunque el control biologico clasico de la conota es factible basado sobre la magnitud de la infestacion, las perdidas economicas, la resistencia hacia los metodos de control convencionales y el informe en la India de un posible enemigo natural especifico a esta planta, la posicion botanica de este pasto maleza requiere una evaluacion de riesgo economico formal antes de continuar con un programa de control biologico clasico. (author)

Cuda, J.P.; Dunford, J.C.; Leavengood, J.M. Jr. [University of Florida, Entomology and Nematology Department, Gainesville, FL 32611-0620 (United States)



Revision curricular a partir de un analisis comparativo de las discrepancias en los curriculos de una escuela de optometria en Puerto Rico con las competencias requeridas para las agencias de revalida y acreditacion 2004  

NASA Astrophysics Data System (ADS)

El proposito de esta investigacion, un estudio cualitativo de caso, fue comparar y contrastar el curriculo vigente de la Escuela de Optometria de la UIAPR con las competencias y estandares requeridos por las agencias de acreditacion y de revalida. Con este proposito, decidimos realizar una revision y un analisis de documentos: el prontuario de cada uno de los cursos de los curriculos implantados en el 1993 y en el 2001; las competencias y estandares establecidos por las agencias de revalida y de acreditacion; y las estadisticas en las que se analiza el porcentaje de estudiantes que aprueban cada una de las partes de los examenes de revalida entre el 1998 al 2003. Se realizaron entrevistas dirigidas para dar apoyo y complementar la revision y el analisis de estos documentos. Los participantes de las entrevistas fueron tres estudiantes de la clase de optometria del 2004 (ultima clase del curriculo del 1993); tres estudiantes de la clase de optometria del 2005 (primera clase graduanda del curriculo vigente) y tres profesores y/o directores de los Departamentos de Ciencias Basicas, Ciencias Clinicas y Cuidado al Paciente. Esta investigacion se enmarco en el modelo de evaluacion curricular de discrepancia de Malcolm Provus y en el modelo de desarrollo basado en competencias. Uno de los hallazgos mas importantes del estudio es que los cambios que se implantaron al curriculo del 2001 no han logrado que los estudiantes mejoren su ejecucion en los examenes de revalida. Por otro lado, se encontro que el curriculo vigente atiende completamente los estandares de la practica de Optometria, pero no las competencias. Esta informacion fue validada mediante el uso de una tabla de cotejo para el analisis de los cursos y de la informacion obtenida de las entrevistas. El estudio determina y concluye que existen discrepancias entre los prontuarios de los cursos del curriculo y las competencias requeridas por la agencia de revalida. Segundo, que el Departamento de Ciencias Basicas es el que presenta mas deficiencias en el desarrollo de las competencias. El investigador recomienda disenar e implantar un curriculo basado en competencias y proveer formacion en didactica y procesos de aprendizaje a los profesores.

Rivera Pacheco, Andres


El galanteo en la adolescencia. Una El galanteo en la adolescencia. Una El galanteo en la adolescencia. Una El galanteo en la adolescencia. Una El galanteo en la adolescencia. Una apr apr apr apr aproximación desde una perspectiva de géner oximación desde una perspectiva de géner oximación desde una perspectiva de géner oximación desde una perspectiva de géner oximación desde una perspectiva de género  

Microsoft Academic Search

Courtship is the phenomenon that starts the complex link between couples. It is mediated by the social representation of a man or woman for each culture and society. The aim of the present study is to demonstrate the importance of gender analysis for understanding the perpetuity of sexist patterns ant to determine the gender differences that influence the way in

Keytel García Rodríguez


Cómo sentar las bases de una justicia universal: Creación de redes internacionales y ejercicio de la responsabilidad penal en el caso de violaciones de los derechos humanos en Chile y El Salvador \\/ Grounding global justice: international networks and domestic human rights accountability in Chile and El Salvador  

Microsoft Academic Search

Para algunos, la detención en Londres del ex-dictador chileno Augusto Pinochet, en 1998, fue una demostración paradigmática de la posible eficacia de las así llamadas «redes globales de la sociedad civil» para hacer efectiva la responsabilidad penal de ex Jefes de Estado por crímenes contra la humanidad. Sin embargo, el presente artículo cuestiona la eficacia de las acciones que pueden

Cath Collins



Los índices de mortalidad por cáncer de pulmón siguen bajando y contribuyen a reducción de índices generales de muertes por cáncer; Informe Anual a la Nación tiene una sección especial de los efectos de otras enfermedades en la supervivencia de pacientes

El Informe Anual a la Nación sobre el Estado del Cáncer (1975 a 2010), mostró un descenso más acelerado que en años anteriores de los índices de mortalidad por cáncer de pulmón. También contiene una sección especial que destaca los efectos significativos que tienen otras enfermedades en la supervivencia de pacientes con cáncer.


Estrés y dolor crónico: una perspectiva endocrinológica  

Microsoft Academic Search

Chronic stress, understood as a disturbance of the body homeostasis, is partially driven by many hormonal pathways. Prolactine, TSH (Thyrotropin), vasopresin, FSH (Follicle-Stimulating Hormone), LH (Luteinizing Hormone), and GH (Growth Hormone) have been involved in many stress reactions. In acute stress, there are many evidences for the increased both cathecolaminergic and hypothalamic-pituitary-adrenal axis. In chronic conditions, these hyperactivations are controversial

Guillem Cuatrecasas Cambra



Una “discussione in rete” con Stanley Wilder  

Microsoft Academic Search

On 4th January 2005 the USA Information Literacy community is shocked by the Stanley Wilder's article “Information Literacy Makes all the Wrong Assumptions” published on The Chronicle of Higher Education. The article strongly criticises against Information Literacy and academic libraries. As a reaction, an intense debate immediately arises within the USA Information Literacy community through the ILI-L discussion list. The

Basile Carla



Ciencia, Sociedad, Soluciones: Una Introduccion al USGS  

USGS Publications Warehouse

El USGS sirve a la nacion de los Estados Unidos proveyendo informacion fidedigna para ? Describir y comprender la Tierra; ? Minimizar la perdida de vidas y propiedades por desastres naturales; ? Manejar los recursos hidrologicos, biologicos, energeticos y minerales; y ? Mejorar y proteger nuestra calidad de vida.

Geological Survey (U.S.)




Microsoft Academic Search

The purpose of this paper is to summarize the state of the knowledge in creativity research and to present a new perspective to what has been published before. A secondary aim is to look for a different approach to use this construct in the educational area, mainly at the college level, and how it relates to the human movement sciences.

Yamileth Chacón Araya



La salud del varón: ¿todavía una quimera?  

Microsoft Academic Search

By means of this opinion article, which was presented at the Third Parallel ASESA-SPA Symposium in the last ESSM Congress held in Lisbon, set out in sections: introduction and historic background until the present (Is there also a sex difference in health?, What can be done?, and, What should be the social and professional response to this evidence?), we will

Jordi Cortada Robert



Elementos para una teoria sociológica del consumo  

Microsoft Academic Search

Elements to a sociological theory of consumption The practice of consumption is in the center of the social reproduction process in developed societies. Nevertheless, tonsumption continues to be peripheral in socio- logical theory. On the other hand, sociological theory needs to work in concrete fields of practices. This paper is proposed as a step to a sociological theory of consumption.

Javier Callejo



Hacia una Maternidad Segura (Making Motherhood Safe).  

National Technical Information Service (NTIS)

To assist policymakers and program managers to design and implement programs to reduce maternal mortality, the paper discusses the lessons for reducing maternal mortality derived from experience and research in both developing and industrial countries. Th...

A. Tinker M. A. Koblinsky P. Daley C. Rooney C. Leighton M. Griffiths A. A. Z. Huque B. Kwast



Alimentos funcionales, una nueva alternativa de alimentación  

Microsoft Academic Search

The consumption of foods that in addition to providing basic nutrition may help cure and prevent some diseases is one of the most innovative aspects that the 21st century offers. Foods that reduce cholesterol intake, help weight loss, avoid osteoporosis, regulate blood pressure and even candy that prevents dental cavities can habitually be found in many supermarkets around the world.




Microsoft Academic Search

ReSUMeN El peso de nacimiento en relación con la edad gestacional, tiene valor pronóstico y sirve para el manejo clínico del recién nacido. La OMS recomienda patrones de crecimiento fetal en los centros perinatológicos, pues se detecta diferencias según países y condiciones de vida. Objetivos. Obtener una curva de referencia peruana del peso de nacimiento para la edad gestacional (CR-PNEG),

Manuel Ticona-Rendón; Diana Huanco-Apaza


A Bükki-terrénum (É-Magyarország), a Jadari-terrénum (ÉNy-Szerbia) és a Sana-Unai- terrénum (ÉNy-Bosznia) karbon, perm és triász rétegsorainak összehasonlítása Correlation of the Carboniferous, Permian and Triassic sequences of the Bükk, Jadar and Sana-Una Terrains  

Microsoft Academic Search

Results of the Hungarian-Serbian cooperation aiming the correlation of Upper Palaeozoic - Triassic series of the Bükk (N Hungary), Jadar (NW Serbia) and Sana-Una (NW Bosnia) terrains are summarised in Hungarian, previously presented in English in PROTI? et al. (2000) and in FILIPOVI? et al. (2003). Comparison with the classical Upper Palaeozoic sequences of the Carnic Alps (Austria\\/Italy, previously presented



Clasificación de los herbicidas  

NSDL National Science Digital Library

Esta lección se enfoca en entender el sistema de clasificación en el cual están organizados los herbicidas. Terminología como clasificación, jerarquía de clasificación, ejemplos de clasificación y un breve resumen de los ocho modos de acción, se discuten en esta lección. Una vez que esto se entiende, es mucho más fácil comprender herbicidas similares y saber por qué estos pueden exhibir ciertos síntomas en malezas y cultivos. Objetivos:Entender la forma en que se clasifican los herbicidas y su importancia en el manejo de la resistencia herbicidaEntender la importancia de la clasificación de los herbicidas por modo de acción, en vez de familiasSer capaz de entender la diferencia entre modo de acción y sitio de acciónSer capaz de diferenciar entre familias de herbicidas, modos de acción, y sitios de acciónEntender nombre común, nombres comerciales y sitios de absorción



Microsoft Academic Search

In this paper several calculations of the stress intensity factor of a circular crack embedded in a fiber under tension are presented. A 3-D finite element model has been developed where the KI value has been computed through the displacement method. Four different crack sizes have been studied varying the position of each inside the fiber cross section. Results show

C. Rosselló; G. V. Guinea; M. Elices


REACH: una reforma ambiciosa reducida a una versión light por la industria química  

Microsoft Academic Search

The changes in the market regualtions on chemical products are the legislative development with the highest impact on occupational health since the Framework Directive in 1989. Workers exposure to dangerous chemicals causes more deaths than work accidents, since chemical risks prevention in the working places is cleraly insufficient. One of the cotributing factors is the inadequate regulation on production and

Laurent VOGEL


Armonización legislativa en materia societaria en el Mercosur: una necesidad o una quimera?  

Microsoft Academic Search

La década del noventa puede ser sencillamente indicada como hito en cuanto a un desmesurado proceso globalizador en marcha. La llamada aldea global presenta un desarrollo cada vez más veloz que involucra distintas variables. Como consecuencia inmediata de tal realidad se destaca un notable incremento de los negocios internacionales, en especial en todo lo relativo a los espacios integrados. Aparece

Sara Lidia Feldstein de Cárdenas; Luciana Scotti; Mónica Rodriguez; Flavia Medina; Vera Baez Peña Wirt; Yamila Cárdenas


El proyecto Cajal4EU inicia desde Zaragoza su trabajo en Europa Alrededor de medio centenar de representantes de las empresas participantes en el Proyecto Cajal4EU se han reunido en Zaragoza en una jornada que servirá de arranque de los trabajos de este grupo. El objetivo de este proyecto es la producción de un chip de diagnóstico médico que permita conocer el estado del paciente en tiempo real  

Microsoft Academic Search

Zaragoza.- Más de medio centenar de investigadores procedentes de toda Europa se han reunido este lunes en Zaragoza en unas jornadas que suponen el punto de arranque de los trabajos del proyecto Cajal4EU. Este proyecto nanobiotecnológico, que recibe este nombre en honor al científico aragonés Santiago Ramón y Cajal y en el que trabajan de forma paralela 30 empresas, tiene

Alejandro Royo Zaragozano



Datura GENUS WEEDS AS AN EPIDEMIOLOGICAL FACTOR OF Alfalfa mosaic virus (AMV), Cucumber mosaic virus (CMV), AND Potato virus Y (PVY) ON SOLANACEUS CROPS Malezas del género Datura como factor epidemiológico del Virus del mosaico de la alfalfa (AMV), Virus del mosaico del pepino (CMV) y Virus Y de la papa (PVY) en Solanáceas cultivadas  

Microsoft Academic Search

A B S T R A C T Plant samples of jimsonweed (Datura stramonium L.) and thornapple (D. ferox L.) were collected to determine the presence of Cucumber mosaic virus (CMV), Alfalfa mosaic virus (AMV), and Potato virus Y (PVY) in Santiago, Chile (33º34' S lat, 70º38' W long, altitude 625 m.o.s.l.), using double stranded RNA (dsRNA) analysis and ELISA.

Juan Ormeño; Paulina Sepúlveda; Ricardo Rojas; Jaime E. Araya


Aspergilosis: puesta al día de una patología a considerar  

Microsoft Academic Search

Pulmonary aspergillosis is a mycotic infection caused by the aspergillus fumigatus, saprophyte of the normal human sputum. Five patients with non invasive aspergillosis were studied, of whom 4 were adults (3 women, 1 man) and one, pediatric, with invasive aspergillosis. All of them were studied by conventional X-ray, spiral CT, multislice CT and video capsule endoscopy. The presentation is predominant

Héctor G. Oxilia; Rodrigo G. Oxilia; Fernando Falco; J. R. Villavicencio Rosario



Una nueva visión de la degradación del almidón  

Microsoft Academic Search

All plant cells synthesize and degrade starch in determined stage of their development. There are, however, important differences related to its use. In leaves, starch is produced and accumulated at day while it is degraded at night to provide carbon maintaining cellular processes. This means that the pathway regulation is integrated to the whole plant metabolism. Starch degradation is a

Lilia Bernal; Eleazar Martínez-Barajas


¿Cómo crear una unidad de arritmias en el siglo xxi?  

Microsoft Academic Search

Arrhythmia and cardiac electrophysiology services are an innovative and fast-growing branch of clinical cardiology. Initiating an arrhythmia unit involves proper selection of personnel, as well as technical, structural, and organizational requirements. Proper selection of personnel includes specialized and well-trained physicians, nurses, and medical technicians in the electrophysiology laboratories and on the hospital wards. Standard electrophysiology laboratories must support the full

Karl-Heinz Kuck; Erik Wissner; Andreas Metzner


no de una superficie c ´ onica en silicio cristalino  

Microsoft Academic Search

onicos; micromaquinado en microelectronica; espejos ´ opticos. A fabrication design of a conic surface (k = ¡6:5), in monocrystalline silicon substrate and based on anisotropic etching with KOH, is presented. The conical surface is approximated by means of spherical windows; comparisons between diameter and separation of the spherical windows, as well as the parameters that govern the selection are discussed.

A. G. Rojas; W. Calleja; R. Perez; F. Gracia



Elementi Per UNA Piattaforma Di Categorizzazione Semantico-Ontologica  

Microsoft Academic Search

I. Introdttzione Da alcuni anni it termine 'ontologia' sembra aver ottenuto piena cittadinanza anche in diversi ambiti legati a ricerche di intelligenza artificiale, ed in particolare in teoria delle basi di dati e di analisi del linguaggio naturale. Si tratta di un movimento in fase di rapida evoluzione che sembra riuscire a richiamare un crescente interesse. In altra sede ([Poli

Roberto Poli




Microsoft Academic Search

Glial evolution still remains unknown, although this process should had required adaptations to the internal medium of the nervous system and to functional needs in the neuroaxis of each species. The hypothesis of the functional and adaptive importance of glia, based on the astrocytary functional multiplicity is supported here as the main objective. The number of glial cells increases in



La Ciencia de los Antiguos Mexicanos: Una Bibliografia Selecta  

ERIC Educational Resources Information Center

Fifty-five citations pertaining to the scientific and mathematic development of ancient Mexicans, particularly the Mayas, are given in this select bibliography. The introduction and descriptions of resource libraries in 8 States are in Spanish. (NQ)

Ortiz-Franco, Luis; Magana, Maria



Confieso que Divulgo. Reflexiones y Experiencias de una Astrofísica  

NASA Astrophysics Data System (ADS)

Este artículo presenta algunas reflexiones en torno a la popularización de la Ciencia, desarrolladas a lo largo de mi trayectoria profesional, un camino inacabado desde la intuición al oficio. Tras revisar las señas de identidad de la divulgación científica, se exponen ideas, experiencias y recursos, cribados por la práctica y su posterior análisis crítico. Se destacan las actividades relacionadas con la Astronomía, que se cuentan entre las más espectaculares y gratificantes. Confessions of a popularizer: This paper presents some author’s thoughts about scientific outreach, developed along her professional path, an unfinished way from intuition to trade. First, identity signs of outreach are revised; then, ideas, experiences and resources, sifted by practice and further critical analysis, are reviewed. Activities related to Astronomy, being one of the most spectacular and rewarding, are remarked 1

Rodríguez Hidalgo, I.


Una mirada hacia el pasado -- El Telescopio Espacial James Webb  

NASA Video Gallery

La NASA planea usar el nuevo Telescopio Espacial James Webb para mirar el pasado. Al observar la luz de las estrellas que se formaron al principio del universo, la NASA está a punto de arrojar nuev...



Microsoft Academic Search

El presente ensayo analiza las principales teorias evolutivas desde Darwin hasta la fecha, entre ellas la teoría de Lamark y la Teoría de la Quimiosintética, todas ellas con un sesgo fuertemente biologico, donde los cambios más decisivos en la homnización que se observan son: la adquisición de la postura erecta, que liberó sus extremidades anteriores y el desarrollo del cerebro,

Fredy Hardy Wompner Gallardo



Una realizzazione attesa: il catalogo generale delle meridiane in Italia  

NASA Astrophysics Data System (ADS)

The Sundial Section of the UAI has compiled the first catalog of 12643 sundials in 3109 municipalities of Italy. Sundials are instruments that measure the passage of time through the movements of the Sun and the shadows it casts. The volume comprises four chapters with introductoring sections regarding how to approach a reading of volume and an appendix containing additional documentary material.

Frosina, Angelo



Il cilindro di Este: testimonianza di una tradizione perduta.  

NASA Astrophysics Data System (ADS)

In the Museum of Este, near Padua in Italy, lies the missing ring of an ancient gnomonic tradition. A small portable roman sundial is on display behind the glasses of a casket, without knowing its real importance. It's in fact the tangible witness of a much more ancient tradition than what believed in the past.

Arnaldi, M.



Índices y ordenamientos de pobreza: Una aplicación para México  

Microsoft Academic Search

This paper uses Atkinson's and Foster and Shorrocks's approach to generate poverty orderings for different population groups in Mexico. The poverty is measured using a range of poverty lines valued from zero to an arbitrary maximum. Poverty is estimated using three poverty measures: the head-count ratio, the normalized poverty gap, and the Foster et al. P3 index. For the comparison

Nora Lustig



Colapso gravitatorio radiante de una estrella extraña en relatividad general  

NASA Astrophysics Data System (ADS)

The seminumeric method by Herrera, Jimenez and Ruggeri, which allows to find dynamic solutions of the equations of Einstein with spherical symmetry starting from well-known statics solutions, are used to treat the collapse of a strange star in the "free streaming radiation limit". Fixed a profile of pulsating luminosity and for a previously studied state equation, it can be demostrated that the frequency of the profile coincides with the frequency of oscillation of the star`s surface. It is proven also that the collapse of a strange star is slower a hundred times that the corresponding to a star of normal matter.

Neira, L. P.


Interacciones socialesy productivas: una aproximación a la teoría deredes  

Microsoft Academic Search

La presente revisión teórica analiza la evolución de los esquemas de interacción entre los individuos y las organizaciones, a partir de los cambios en los contextos económicos y las complejidades del mercado —que se entienden como la especialización de la demanda, el creciente cambio del desarrollo tecnológico, el aumento de las exigencias normativas en los mercados internacionales y las redes

Julián Piñeres Ramírez



Esercitazioni Matematiche: Una Rivista Ad uso Degli Studenti Universitari.  

ERIC Educational Resources Information Center

The history of the journal "Esercitazioni Matematiche" (1921-43) edited by the "Circolo Matematico di Catania" for university students is described. A selection of proposed problems with some of their solutions is reported. (Author)

Micale, Biagio



Cálculo de la respuesta de una cavidad optoacústica semiesférica  

Microsoft Academic Search

Palabras clave: optoacústica, cavidades resonantes, factor de calidad. The amplitudes of the pressure wave, relative to the delivered power to the medium, are calculated for two resonant cavities: one of them spherical and the other hemispherical. Both cavities have no windows; the power source is a led placed at the center of each cavity. These results are compared with the


C/1999 S4 (LINEAR): la morte di una cometa  

NASA Astrophysics Data System (ADS)

The comet C/1999 S4 was expected to be a moderately bright object during summer 2000. It was observed by visual, photographic and CCD techniques. The derived light curve shows that the comet reached a brightness maximum (mag. 6 around July 26) corresponding to the total dissolution of its nucleus. From the analysis of the light curve a double maximum was detected, the dissolution event appearing to start around July 20. Several morphological changes were also observed during the apparition in relation to partial fragmentation events. The comet aspect completely changed during the final disruption. Relevant changes in the plasma tail were observed and they are probably related both to the activity of the nucleus and to the solar wind. A perspective anti-tail was detected in early July.

Foglia, Sergio; Ligustri, Rolando; Milani, Giannantonio



Una nueva estimación astrosismológica de la masa del axión  

NASA Astrophysics Data System (ADS)

G117-B15A and R548 are the two pulsating white dwarf stars more studied within the class of ZZ Ceti variables (atmospheres rich in H). In this work, we present new asteroseismological models for G117-B15A and R548, and employ the rates of period changes with time for the dominant modes of these stars in order to place new constraints on the axion mass. FULL TEXT IN SPANISH

Córsico, A. H.; Althaus, L. G.; Romero, A. D.


Estudio de la dinámica de una fulguración de clase M.  

NASA Astrophysics Data System (ADS)

In this work we analize the compact flare of May 9, 2012, at 12:21 UT using data in different wavelenghts, including images obtained with the H-Alpha Solar Telescope for Argentina (HASTA). We identify the brightenings, their location with respect to the photospheric magnetic field, and the presence of a surge after the flare impulsive phase. We interprete the observations and the presence of cold loops after the flare in terms of the location of the energy release site. We estimate the height and length of the loops through which the surge material flows. FULL TEXT IN SPANISH

Luoni, M. L.; Francile, C.; Mandrini, C. H.


Creación de una cafetería con servicio especializado de \\  

Microsoft Academic Search

At first hour at the morning or to join your friends after a meal, there is no doubt that drinking a coffee is quite a pleasure. Now the market offers several opportunities that allow the people to meet in someplace and drink a delicious coffee. The difference in this coffee shop is that this service is only by drive-thru, so

Estefania Dejo


Dispersion de Ondas Sonoras Por Una Gota de Liquido  

Microsoft Academic Search

Not Available Bibtex entry for this abstract Preferred format for this abstract (see Preferences) Find Similar Abstracts: Use: Authors Title Return: Query Results Return items starting with number Query Form Database: Astronomy Physics arXiv e-prints

Marcos Moshinsky



Como Iniciar una Cooperativa (How to Start a Cooperative).  

National Technical Information Service (NTIS)

This is a step-by step detailed guide to forming a cooperative, beginning with promotion, and going on to cover the following topics: The first meeting of potential members; work of the planning committee; second meeting of potential members; work of the ...

I. W. Rust



Como Organizar una Cooperativa (How to Organize a Cooperative).  

National Technical Information Service (NTIS)

Four pamphlets explain co-ops in general, co-ops as businesses, how co-ops succeed and how to form a co-op. Co-ops in the American Private Enterprise System compares co-ops with other businesses. The Business Co-op explains how a co-op can function as a p...



Una Arquitectura Abierta para Intermediaci ´ on en Servicios Web  

Microsoft Academic Search

We propose an open architecture to integrate available web services into a common framework. The aim of this propo- sal is to make available to a user community in a designated environment (e.g. a mall or a railway station) a portfolio of services already available through the web. A service abs- traction layer provides a common model to access services,

Manuel J. Fern; Judith S. Rodr ´ õguez; Luis E. Anido


Edukalibre: una herramienta para la creacion colaborativa de material didactico  

Microsoft Academic Search

El Software Libre, con sus caracter¶‡sticas y su particular modelo de desarrollo, ha permitido la creacion de un conjunto de metodolog¶‡as de trabajo en grupo que han resultado satisfactorias en gran cantidad diferentesambitos. En este sentido, el proyecto Edukalibre importa y adapta estas metodolog¶‡as para ser aplicadas en la creacion y man- tenimiento de documentacion en elambito de la educacion.

Diego Chaparro; Teofllo Romera


Vascular Plant Image Gallery  

NSDL National Science Digital Library

Texas A&M University's Bioinformatics Working Group offers this no-nonsense botany teaching resource. Vascular plants are arranged alphabetically by family from Acanthaceae to Zygophyllaceae and users simply click for the images. Brief descriptions are provided (which may indicate the popular name of the plant). The site is searchable. Familiarity with vascular plant taxonomic nomenclature is assumed.

Manhart, James R.


Ethylene production and post-pollination development in Dendrobium flowers treated with foreign pollen  

Microsoft Academic Search

Dendrobium ‘Pompadour’ flowers fade early following pollination. This is associated with increased ethylene production and early epinasty. These effects are also produced by application of 1-aminocyclopropane-1-carboxylic acid (ACC) on the stigma. Pollen (one anther each) from Ruellia tuberosa L. (Acanthaceae) and Caesalpinia pulcherrima (L.) Sw. (Fabaceae) also increased ethylene production and caused early epinasty and fading. Pollen of Hibiscus schizopetalus

S. Ketsa; K. Bunya-Atichart; Doorn van W. G



Effects of Strobilanthes crispus Tea Aqueous Extracts on Glucose and Lipid Profile in Normal and Streptozotocin-Induced Hyperglycemic Rats  

Microsoft Academic Search

Strobilanthes crispus (Acanthaceae) has been used traditionally as antidiabetic, diuretic, antilytic, and laxative and has been proven scientifically to possess high antioxidant activity, anti-AIDS, and anticancer properties. It is commonly consumed in the form of herbal tea. The ethnopharmacological value of this plant, such as the development of nutraceutical S. crispus herbal tea (fermented and unfermented) and assessment of their

A. B. Mohd Fadzelly; R. Asmah; O. Fauziah




Microsoft Academic Search

This study investigated the anti diarrhoeal activity of the aqueous extract of dried ground leaves of Eremomastax speciosa (Hochst.) Acanthaceae. Diarrhea was induced in mice by the administration of 0.2 ml of castor oil, with the control group receiving water. The administration by oral garvage of 400 or 800 mg\\/kg body weight of Eremomastax speciosa extract reduced castor oil induced

E. Assi Sheila; A. Agbor; David F. Musoro



Evaluation of the antioxidant activity of Ruellia tuberosa  

Microsoft Academic Search

The antioxidant activity of Ruellia tuberosa L. (Acanthaceae) was investigated by the 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radical-scavenging assay and the hydrogen peroxide-induced luminol chemiluminescence assay. The methanolic extract (ME) and its four fractions of water (WtF), ethyl acetate (EaF), chloroform (CfF), and n-hexane (HxF) were prepared and then subjected to antioxidant evaluation. The results of both methods revealed that R. tuberosa

Fu-An Chen; An-Bang Wu; Pochuen Shieh; Daih-Huang Kuo; Chi-Ying Hsieh



[Advances in studies on aryltetralin lactone lignans].  


Natural aryltetralin lactone lignans existed in the plants of family Berberidaceae, Acanthaceae, Burseraceae, Verbenaceae, Euphorbiaceae, etc. Due to the antineoplastic and antiviral properties, it has become a hot research topic in medicinal chemistry. This review covers extraction and isolation, biosynthesis, plant origin, and structure and spectral characteristics of natural aryltetralin lactone lignans. It will provide a useful reference for the intensive studies and rational utilization of aryltetralin lactone lignans. PMID:24079224

Sun, Yan-Jun; Wang, Jun-Min; Chen, Hong; Hua, Hui-Ming



Anti-inflammatory activity of Justicia prostrata gamble in acute and sub-acute models of inflammation  

Microsoft Academic Search

In this study, the aqueous (AQJP) and alcoholic (ALJP) extracts of the whole plant of Justicia prostrata Gamble (Acanthaceae) were screened for their acute and subacute anti-inflammatory activities using carrageenan-induced acute\\u000a inflammation and cotton-pellet-induced granuloma (subacute inflammation), respectively, in rats. In the carrageenan-induced\\u000a rat paw oedema model, both extracts were found to exhibit maximum reduction in paw volume at the

E. Sanmugapriya; P. Shanmugasundaram; S. Venkataraman



Formulation and pharmacokinetic evaluation of hard gelatin capsule encapsulating lyophilized Vasa Swaras for improved stability and oral bioavailability of vasicine.  


The oral bioavailability of vasicine (1) was investigated in hard gelatin capsules of lyophilized Vasa Swaras (aqueous extract of Adhatoda vasica Nees.,Fam.: Acanthaceae) The rat pharmacokinetic profile of lyophilized Vasa Swaras, Vasa Swaras, vasicine (1) (chief marker compounds of A. vasica) and a marketed capsule formulation of A. vasica were compared. Vasicine (1) was found to be more orally bioavailable from lyophilized Vasa Swaras, with an overall minor conversion to vasicinone (2). PMID:21187127

Vyas, Tejas; Dash, Ranjeet Prasad; Anandjiwala, Sheetal; Nivsarkar, Manish



Separation of andrographolide and neoandrographolide from the leaves of Andrographis paniculata using high-speed counter-current chromatography  

Microsoft Academic Search

The bioactive diterpenes andrographolide and neoandrographolide from the leaves of Andrographis paniculata NEES (Acanthaceae) were successfully separated by counter-current chromatography. A single 280-min separation yielded 189 mg of 99.9% andrographolide and 9.5 mg of 98.5% neoandrographolide applying water–methanol–ethyl acetate–n-hexane (2.5:2.5:4:1) solvent system. Structure confirmation was done by electrospray MS, one-dimensional NMR experiments, circular dichroism, optical rotation dispersion, and specific optical

Qizhen Du; Gerold Jerz; Peter Winterhalter



Screening and optimization of Andrographis paniculata (Burm.f.) Nees for total andrographolide content, yield and its components  

Microsoft Academic Search

Andrographis paniculata (Burm.f.) Nees (Acanthaceae), commonly known as Kalmegh is used both in Ayurvedic and Unani system of medicines for a number of ailments related to digestion, hepatoprotection, hypoglycemic, and as anti-bacterial, analgesic, anti-inflammatory, vermicidal and antiacene. Ten accessions of A. paniculata from different sources were screened to assess the yield and its components besides andrographolides on three harvesting dates

M. K. Bhan; A. K. Dhar; S. Khan; S. K. Lattoo; K. K. Gupta; D. K. Choudhary



Se identifica una relación entre la falta de exámenes de detección y una gran parte de los casos de cáncer de seno en la etapa avanzada

Los autores de un estudio publicado el 20 de octubre de 2004 en la revista Journal of the National Cancer Institute1? declaran que las dos prioridades principales del sistema de salud deben ser aumentar el porcentaje de exámenes de mamografía e invertir en investigaciones que mejoren la tecnología para detectar el cáncer de seno.


Aspetti economici della digestione anaerobica nell'agroindustria: Applicazione di una nuova tecnologia in una distilleria. (Agro-industrial anaerobic digestion cost benefits: Technology utilization in distillery).  

National Technical Information Service (NTIS)

Anaerobic digestion, followed by aerobic post treatment, is widely used as a treatment technology of distillery wastes. An economic comparison between two different treatment processes; a traditional concentration unit and the termophilic hybrid anaerobic...

F. De Poli E. Mela S. Pasqualini



Una sociedad legalista: Abogados, procuradores de causas y la creacion de una cultura legal colonial en Lima y Potosi, 1540--1670  

Microsoft Academic Search

This study deals with the formation, reproduction, and the role in litigation of two branches of the legal profession, lawyers and procurators. They were the experts in charge of civil, criminal, and ecclesiastical litigation during the Old Regime. While the lawyers provided erudite legal advice, procurators oriented and drove the procedure as legal representatives of their clients. The European legal

Renzo Honores




Microsoft Academic Search

Cardiovascular diseases are the main cause of death in the world and Mexico is not exception, since a great number of people suffer of hypertension and the use of synthetic drug for the control of this disease can cause in the organism diverse secondary reactions, such as: cough, taste perturbation, rash in the skin, among others. An alternative for the

J. G. Torruco-Uco; M. A. Domínguez-Magaña; G. Dávila-Ortíz; A. Martínez-Ayala; L. A. Chel-Guerrero; D. A. Betancur-Ancona



The Combine Project: An Experience in a Dual-Language Classroom = El proyecto de la cosechadora: una experiencia en una clase bilingue.  

ERIC Educational Resources Information Center

This article, also available in Spanish, describes what happened when a bilingual kindergarten class in West Liberty, Iowa, investigated a combine. The dual-language Kindergarten program supports content area instruction in both Spanish and English. The first part of the article tells the story of the Combine Project, this class's first project…

Wilson, Rebecca


Zinc sérico en menores de 15 años de una comunidad rural del estado Lara  

Microsoft Academic Search

Abstract Abstract Abstract Abstract. The aim of this research was to determine the levels of serum zinc in a rural population under 15 years old, in Lara State, Venezuela, in order to know the deficiencies of this oligoelement and start the nutritional inter- vention by the involved organizations. The sample was made up of 310 subjects (M: 163; F: 147)

Yelitza Berné Peña; Jham Frank Papale; Mario Torres; Norelys Mendoza; Graciela Dellan Rodríguez; Diolisbeth Rodríguez; Zuly Briceño; José Miguel Moreno


Tengo una Bomba: The Paralinguistic and Linguistic Conventions of the Oral Practice Chismeando.  

ERIC Educational Resources Information Center

This article offers a linguistic and paralinguistic explication of the oral practice of chismeando (gossiping) as engaged in by a group of women from the Dominican Republic. A culture-specific study of the structuring resources by which the participants construct, maintain, and/or modify their in-group identities in everyday oral practice is…

Hall, Joan Kelly



Chile: Una Vision Politica, Economica y Social (Chile: A Political, Economic, and Social View).  

ERIC Educational Resources Information Center

This address seeks to explain in brief the historical background and political, economic, and social conditions leading to the democratic election of a Marxist president in Chile. A historical sketch of Chilean government from independence in 1810 is provided with a description of the situation just before Salvador Allende's election in 1969. Some…

Cortes-Hwang, Adriana



Exposición ocupacional a solventes orgánicos en una fábrica de calzado en Valencia, Venezuela, 2001  

Microsoft Academic Search

SUMMARY Potential health effects of organic solvents exposure were assessed. Thirty six workers of shoe manufacturer located in Valencia, Venezuela, were studied. They had a medical exam, and an occupational history. Biological indicators of exposure (toluene in blood; methylethy- ketone, methylisobuthylketone, acetone and hippuric acid in urine) and effect (creatinine in urine, hematologic analyses, bilirubin, transaminases and alkaline phoshatase-AP) were

Maritza Rodríguez; Guido Squillante; Maritza Rojas; TRABAJOS ORIGINALES


La ecología de Egeria densa Planchon (Liliopsida: Alismatales): ¿Una especie ingeniera de humedales?  

Microsoft Academic Search

Egeria densa Planchon is considered an invasive species in continental aquatic systems in Chile. Its original geographical distribution was limited to the subtropical regions of Brazil, Argentina and Uruguay. Its fast growth and dense canopy-forming habit are associated with the clear water state of shallow water continental ecosystems. As a dominant species in many of the systems in which it



El espejo deformado: Una propuesta de análisis del reciclaje en la ficción audiovisual norteamericana  

Microsoft Academic Search

This paper is an approach to the different ways in which a narrative material can be reused in the cultural industries through the case study of the United States. Starting from the present situation of the investigations on literary

José Manuel de Pablos Coello



Los tratamientos psicológicos en la fobia social infantil y adolescente: una revisión cualitativa  

Microsoft Academic Search

Se presentan los resultados de un estudio cualitativo de revisión de la eficacia de los tratamientos psicológicos utilizados en la fobia social en niños y adolescentes. Se localizaron 26 investigaciones: 5 artículos son diseños de caso único, 6 presentan los datos de un solo grupo tratado y aportan medidas pretest-postest y 16 informes son grupos de comparación entre tratamientos psicológicos

Ana Isabel Rosa Alcázar; Pablo J. Olivares-Olivares; Marina Iniesta




Microsoft Academic Search

INTRODUCTION: In adolescence are configured the ideals of life alter that will form the identity of the adult. According to OMS the prevalence it reaches 8% in young. The province of Corrientes has the highest indexes of suicides in Argentine. OBJETIVE: determinate the prevalence of anxiety and de- pression on teenagers in habitants of the rural population, and the coexistences

Alejandro Festorazzi Acosta; Alejandro Luis Rodríguez; Javier Andrés Lotero



Microsoft Academic Search

It is well known that the gene GRIN-1 plays a fundamental role in many cerebral functions and it has been associated with numerous diseases. For this reason it has awakened a great scientific interest in understanding how the polymorphisms of this gene are distributed among normal and diseased populations. Up to now the polymorphisms that lead to an amino acid

V. Villegas; I. Zarante; L. Lareo




Microsoft Academic Search

Development of a didactic unit: The study of chemical bond in the last years of secondary school Summary. The planning and development of didactic units is an unbeatable element for preparing a set of lessons based on a constructivist approach, within the framework of a pedagogical content knowledge that impacts on science learning. We are presenting the details of the


A Guide to Delegate Preparation: UNA-USA Model UN Survival Kit. 1988-89 Edition.  

ERIC Educational Resources Information Center

Written by students for students, the purpose of the book, one of four components of the Model UN Survival kit, is to help prepare secondary and college student delegates for participation in Model United Nations (UN) Conferences. Model UN programs help students discover the difficulties of world political processes and understand other nations…

Muldoon, James P., Jr., Ed.; Diehl, John, Ed.


La infección por virus del papiloma humano, una amenaza real para las adolescentes  

Microsoft Academic Search

We performed a study on cervical pathology in adolescents in the Clodomira Acosta Ferrales Obstetrics and Gynecology Hospital between January 2006 and May 2007, in which 340 sexually active adolescents were evaluated.Of these, 192 had colposcopic criteria compatible with subclinical lesions produced by HPV infection and underwent colposcopically-guided punch biopsy. A histological diagnosis of HPV was made in 117 adolescents,

Margarita Solares; Omayda Safora Enríquez; Aldo Rodríguez Izquierdo



Hacia la hipertelevisión. Los primeros síntomas de una nueva configuración del dispositivo televisivo  

Microsoft Academic Search

The article proposes a first map of the transformations that are shaping television since the diffusion of the new interactive media. If we think that the new textualities coexist with the traditional ones inside the same media ecology, it could be pertinent to analyze the contaminations between them. The television of the XXIst century is speaking to audiences formed in

Carlos Scolari


Areas Nacionales de Estudio Ambiental: Una Guia. (National Environmental Study Area: A Guide).  

ERIC Educational Resources Information Center

This booklet, the Spanish version of SE 014 817, is a guide for teachers and resource managers who are interested in establishing National Environmental Study Areas (NESA) or interested in receiving NESA recognition for their on-going environmental study area programs. It outlines the characteristics and procedures of the program; the nature,…

National Park Service (Dept. of Interior), Washington, DC.


Una Guia Para Padres Para El Cuidado de Ninos (A Parent's Guide to Child Care).  

ERIC Educational Resources Information Center

This booklet was designed to help parents in Oregon in finding and financing child care for their children. The first section of the booklet provides information on the Oregon Department of Human Resources' Adult and Family Services (AFS) Division's Aid for Dependent Children (ADC) and Employment Related Day Care (ERDC) programs. This section…

Oregon State Dept. of Human Resources, Salem.


Utilidad del diagnóstico molecular en una familia con síndrome de Marfan y un fenotipo vascular atípico  

Microsoft Academic Search

Marfan syndrome is mainly caused by mutations in the FBN1 gene. Diagnosis is usually based on clinical criteria, but the phenotypic presentation varies widely among affected individuals. Aortic dissection or rupture is the cause of death in over 90% of untreated patients. Early identification of individuals at risk is important given the availability of medical and surgical treatment that can

Ana Lebreiro; Elisabete Martins; Jorge Almeida; Sofia Pimenta; José Miguel Bernardes; José Carlos Machado; Cassiano Abreu-Lima



¿Competencia o colusión en el mercado de gasolina? Una aproximación a través del parámetro de conducta  

Microsoft Academic Search

Este trabajo analiza la competencia en el mercado minorista de gasolinas. Para ello nos centramos en el mercado de las Islas Canarias porque ofrece dos ventajas inéditas respecto de otros mercados: la facilidad en la definición del mercado relevante (insular) y la existencia de mercados en monopolio y en oligopolio simultáneamente. Este último hecho permite estimar un modelo de variaciones

Jordi Perdiguero; Juan Luis Jiménez



Una nota sobre el modelo de telaraña y los mercados a futuro  

Microsoft Academic Search

Generalmente se acepta que los mercados que funcionan con expectativas del tipo “telaraña” son ineficientes y que agentes con expectativas correctas podrían explotar esta ineficiencia ya sea a través de convertirse en productores del bien en cuestión o vendiendo las predicciones propias que serían más acertadas que la del tipo “telaraña”. Esta nota presenta un tercer método para explotar las

Maurice W. Schiff



Forma e funzioni delle reti di imprese: evidenze da una ricerca nel settore vitivinicolo  

Microsoft Academic Search

Il tema delle reti di imprese, già da tempo studiato, si presenta ora in tutta la sua rilevanza. La rete, infatti, costituisce uno strumento per incrementare la competitività delle imprese e per decretare il successo delle strategie da queste adottate. Il recente intervento che ha introdotto il contratto di rete testimonia anche il vivo interesse del legislatore. L’attuazione dello strumento

Federica Casarosa; Marco Gobbato




Microsoft Academic Search

L'articolo riporta i risultati di uno studio qualitativo volto a: 1) individuare temi ricorrenti e tattiche utilizzate dall'industria del tabacco per attirare i giovani afroamericani nel mercato delle sigarette e 2) far emergere le conoscenze, gli atteggiamenti, le intenzioni e le credenze dei ragazzi afroamericani in relazione al fumo e all'industria del tabacco, per aiutare a sviluppare campagne di contro-

Francesca Di Stefano


Community Resources Guide for Central Florida = Una Guia de Recursos en la Comunidad de Florida Central.  

ERIC Educational Resources Information Center

Designed to orient Hispanic refugees to the services that are available in Central Florida, this bilingual guide consists of a section of general information on living and working in the United States and a section devoted to various public and private agencies. Provided first are addresses and phone numbers of various government agencies:…

Medina, Linda, Comp.


Dins el bosc de la cultura visual. Apunts per a una actualització pedagògica  

Microsoft Academic Search

L’era de la comunicació acara la comunitat educativa davant de nous reptes, especialment en l’àmbit de la cultura visual. La cultura visual es manifesta avui arreu i no hi ha àmbit ni familiar ni social ni educatiu que no en participi. Més enllà de la visualització i experimentació d’alguns procediments artístics canònics, l’ensenyament de les arts visuals i plàstiques observa

Teresa Duran i Armengol




Microsoft Academic Search

Based on the cognitive distinction between tourist and native spaces, the article establishes the anthropological construction of tourism space. Since the early times of tourism in El Puerto as a seaside resort, the beach was both a healthy and a ludic space. The article analyses the causal relation among class society, leisure and health and the histocial conection between tourism

Antonio Miguel; Nogués Pedregal



Tumor de células de Leydig de ovario: una causa infrecuente de virilización en la mujer posmenopáusica  

Microsoft Academic Search

Leydig cell tumor of the ovary is a very rare neoplasm that usually occurs in postmenopausal women. We report the case of a 72-year-old woman with symptoms of virilization. Hormonal evaluation showed marked elevation of serum testosterone (12038pg\\/ml) and no evidence of increased production of other sexual hormones. Ultrasound examination revealed a 10-mm tumor within the left ovary. Subsequently, total

L. Yébenes; J. Ignacio Sánchez; J. de Santiago; M. Santiago; F. Gilsanz; A. Suárez; D. Hardisson



El papel del gobierno en el desarrollo económico: una reflexión a partir de la experiencia  

Microsoft Academic Search

RESUMEN El trabajo expone el aprendizaje obtenido como producto de años de trabajo guberna- mental buscando opciones para impulsar el desarrollo económico competitivo de Jalisco. Se resumen los objetivos prioritarios que guiarían la política económica, así como las estrategias definidas para alcanzarlos; se examinan algunas de las herramientas aplica- das para motivar la cooperación orientada a lograr eficiencia colectiva en

Laura Guevara Domínguez


El gobierno de la educación en Inglaterra y Perú: una mirada comparada desde la economía política  

Microsoft Academic Search

Durante los últimos treinta años, el gobierno de la educación, como el de otros sectores, ha experimentado cambios importantes que han redefinido las escalas en las que se gobiernan los servicios educativos, así como quiénes son los actores responsables de dichos servicios. Este trabajo explora tales cambios en dos casos particulares, Inglaterra y el Perú, dos contextos cuya poca similitud

María Balarín



Sistemas Eolicos Pequenos Para Generacion De Electricidad; Una Guia Para Consumidores En Los EE.UU.  

National Technical Information Service (NTIS)

This Spanish version of the popular Small Wind Electric Systems: A U.S. Consumer's Guide provides consumers with information to help them determine whether a small wind electric system can provide all or a portion of the energy they need for their home or...



EL TLC CA-EE.UU.: ¿Una Oportunidad de Crecimiento para los Paises Centroamericanos¿  

Microsoft Academic Search

Esta presentación fue comisionado por la Red de Integración y Comercio del Diálogo Regional de Política para la V Reunión Hemisférica celebrada los días 14 y 15 de agosto de 2003. Antecedentes Motivos y Razones de la Negociación Objetivos Generales de la Negociación Características y Estructura de la Negociación Contenido del TLC Agenda Integral de Cooperación Avances de la negociación

Gabriela Llobet




Microsoft Academic Search

Ethnobotany is the branch of human knowledge that studies the relationship between plants and human. In Mexico, angiosperms have been mostly studied. However, there are seedless plants such as the genus Equisetum that has an important cultural value as evidenced in several communities, mainly due to its biochemical properties. In this paper we presented a review of bibliographical information supplemented

Juan Carlos Gallardo-Pérez; María de Lourdes Esparza-Aguilar; Armando Gómez-Campos



Microsoft Academic Search

El trabajo que aquí se presenta ha tenido como objetivo analizar, a través de métodos etnográficos, los comportamientos de niños y niñas de cinco años en el denominado juego sociodramático para comprobar si se percibían diferencias en relación al género. El planteamiento teórico del que hemos partido ha sido el enfoque socio-cultural (Vygotski, Elkonin, Bruner) que entiende este juego como

Emma Lobato


Habitos Alimentarios e Higiene Dental en una Poblacion Preescolar de Madrid.  

ERIC Educational Resources Information Center

Nutriment habits and oral hygiene in a preschool population in Madrid were studied by stratification in public or private schools. Significant differences were found only with regard to consumption of fish. Vegetable and fruit consumption was low in both groups, but not statistically significant. (SH)

Lafarga, R. Tarazona; And Others



Estudio de una "supercáscara" de hidrógeno neutro galáctica centrada en (l; b) = (305°; +4°)  

NASA Astrophysics Data System (ADS)

As part of a research program aiming at detecting neutral hydrogen (HI) shells in the interstellar medium of the Milky Way, in this paper we ex- amined the genesis, physical characteristics and dynamics of a HI structure centered at (l, b) = (305 , +4 ) whose baricentral radial velocity is -25 km s-1 (LSR). The HI survey carried out at the IAR was used in this study. FULL TEXT IN SPANISH

Corti, M. A.; Arnal, E. M.


Musings on "Densidades, Potenciales y Funciones Asociadas a una Galaxia Reducida" by Poveda et al. (1960)  

NASA Astrophysics Data System (ADS)

We present a critical review on the paper "Densities, Potentials and related functions for a spherical reduced galaxy" by A. Poveda, R. Iturriaga, and I. Orozco published in 1960 in the Boletín de los Observatorios de Tonantzintla y Tacubaya (BOTT), 2, 20, 3.

López-Cruz, O.; Aguilar, L. A.; Añorve, C.




Microsoft Academic Search

SUMMARY There are different factors within work environment that could create both wellbeing and distress in workers. The climate per- ception employees have, as well as their evaluation of some, could have positive and negative consequences at personal and organizational levels. Work stress is another element that has meaningful repercussions on the health of people and on the quality of

Silvia Carreño García; Ma. Elena Medina-Mora; Nora Martínez Vélez; Francisco Juárez García; Lucía Vázquez Pérez



Ondas Largas que Llegan a una Plataforma Continental (Large Waves Which Reach the Continental Shelf).  

National Technical Information Service (NTIS)

Proof is given in this work that long waves of 12.5 minutes of period, arriving at the coast of Malaga might well correspond to a kind of edge waves formed at the coast. Two cases are considered: idealized platform and a more general continental platform,...

F. F. Castillejo



Su una nuova associazione dei Pegano-Salsoletea osservata presso Porto Empedocle (Agrigento)  

Microsoft Academic Search

On a new association of the Pegano-Salsoletea observed near Porto Empedlocle (Agrigento). – The authors describe a new halo-nitrophilous association of Pegano-Salsoletea, proposed as Salsolo-Limonietum opulenti. This association occurs on the coast near Porto Empedocle (western Sicily) where it grows on marly and clayey soils. The vegetation is characterized by two endemic species (Limonium opulentum and Herniaria fontanesii ssp. empedocleana)

Salvatore Brullo; Maria Grillo; Concetta Scalia



Una Experiencia Pedagogica en el Jardin Infantil "La Cabana" (A Teaching Experience in "La Cabana" Kindergarten).  

ERIC Educational Resources Information Center

Reviews the history of La Cabana kindergarten, which provides preschool education and meals for 100 children and sewing classes for mothers in a working class neighborhood in Bogota, Colombia. Describes the implementation of a new curriculum which develops child creativity through free choice of activities around a common project. (AC)

de la Vega, B.



Caracteristicas reproductoras de una poblaci6n introducida de Podarcis pityusensis  

Microsoft Academic Search

Reproductive traits of an introduced population of Podarcis pityusensis.- The reproductive cycle of the Ibiza Wall Lizard (Podarcis pityusensis) was analyzed for the first time in an introduced population living in an urban area of Barcelona (NE Spain). Sexual maturity reached at the second year oflife since subadults could be seen in spring. Reproductive period lasted from April to August,



Modelación y simulación computacional de un proceso productivo de una pequeña empresa usando dinámica de sistemas  

Microsoft Academic Search

This article aims to motivate the academic sector as well as the small and medium sized firms to develop, in the field of dynamic system simulation, cooperative works which will lead to a clearer and more reliable enterprise management, and also contribute to the training of professionals who are best suited to satisfy the needs existing in today's society. To

Carlos Mario; Parra Mesa; Jorge Iván; Pérez Rave; Diego Torres Franco



GERBERTVS una nuova rivista per l'astronomia e la scienza nell'alto medioevo  

NASA Astrophysics Data System (ADS)

GERBERTVS appears as an international e-journal on medieval science, namely astronomy. It has been created to gather all the studia promoted on Gerbert of Aurillac, the most prominent figure of the tenth century: astronomer, organ builder and music theoretician, mathematician, philosopher, and finally pope with the name of Silvester II (999-1003). Here is presented the first volume (2010) published in the institutional web site with the ISSN 2038-355X.

Sigismondi, C.


Historia de una reconversión silenciosa. El capital francés en España, c. 1800-1936  

Microsoft Academic Search

Este artículo trata de reconstruir la trayectoria de la inversión francesa en España desde principios del siglo XIX hasta los albores de la Guerra Civil. Para ello, se describen la implantación y apogeo del modelo de inversión francés durante buena parte del siglo XIX; así como su agotamiento y posterior reestructuración a partir del cambio de siglo y, en especial,

Rafael Castro Balaguer




Microsoft Academic Search

Franchising system continues its unstoppable advance worldwide, as in the most commercially developed countries as in those that have some more antiquated commercial structures. For that reason, nowadays, this is an important research topic in the business area. Franchising chains expand themselves through own and franchised units, in this context, this work intends to determine what kinds of units are

Díez de Castro; E. C. Navarro García



Asimetría de la información, inestabilidad financiera y la crisis bancaria venezolana: Una visión crítica  

Microsoft Academic Search

Resumen La función de las instituciones financieras es la de servir como intermediarios entre las unidades excendentarias (ahorristas) y las deficitarias de fondos (empresa- rioslinversionistas). Para ello, es necesario que operen con un nivel mínimo de eficiencia, ¡.e., maximicen beneficios al mismo tiempo que minimizan riesgos. Sin embargo, en situaciones caracterizadas por un marco macroeconómico adverso, ineficiencia institucional y escasez

Daniel Anido


Historia de una quimera. La industria algodonera en Castilla la Vieja, 1846-1913  

Microsoft Academic Search

En 1860 Valladolid albergaba el mayor distrito algodonero del centro de España. Transcurridas cuatro décadas, todas sus fábricas había sido ya clausuradas. El presente trabajo analiza las razones de este fracaso. Dado que los productos castellanos no podían competir con los catalanes debido al coste de la energía, los industriales de Valladolid y Santander tuvieron que refugiarse en el mercado

Javier Moreno Lázaro



Efectos de los armónicos en los motores de inducción: una revisión  

Microsoft Academic Search

The behavior of induction machines varies when they are feed with sources having harmonics tension. This paper shows a view about the conditions operation and the effects of the harmonics tension, in the trifasical induction motors. Basically, will be checked: model, useful life, temperature, additional loses thermical old, power factor, efficiency, vibrations and noises, pulses torques and derated.

John Grajales; José Ramírez; Diego Cadavid



Una Visita al Viejo San Juan (A Visit to Old San Juan).  

ERIC Educational Resources Information Center

Written in Spanish, this black and white illustrated booklet provides a tour of Old San Juan, Puerto Rico's oldest and most historic city. Brief historical information is provided on the Perro de San Jeronimo, a statue of a barking dog found in front of the Castillo; Plaza de Colon, a small plaza dedicated to Christopher Columbus; the Catedral de…

Cabello, Victor; And Others


Una exploracion completa de los costes de servicio de residuos solidos  

Microsoft Academic Search

The economics literature on urban solid waste collection is scarce, although this type of services has undergone organizational as well as regulatory reforms. This research studies the cost structure of solid waste collection in order to explain why the costs caused by this service vary among municipalities. To do so, first we derive a cost function. We then specify and

Germa Manel Bel Queralt



Barras de acero galvanizado: Una opción contra la corrosión inducida por la carbonatación  

Microsoft Academic Search

Concrete carbonation is the second cause of corrosion in reinforced concrete structures, and in inland tropical environments, it would be the main corrosion mechanism. Once concrete is carbonated, plain rebars are known to corrode actively. The objective of this investigation was to study the performance of galvanized reinforcing steel as an alternative reinforcing material under those circumstances. Three different water\\/cement

Eric I. Moreno; Daniel Serrano Ixtepan; Enrique Cob Sarabia



El Plumbisme en ocells aquàtics als Països Catalans: diagnosi d?una situació censurable  

Microsoft Academic Search

Moltes de les zones humides dels Països Catalans han tingut durant anys un aprofitament cinegètic intensiu. En la caça s'ha utilitzat tradicionalment cartutxeria feta de perdigons de plom, un metall pesant que ara sabem que és força tòxic. En els sediments dels aiguamolls s'hi han anat acumulant milions d'aquests petits objectes contaminants i tòxics, i s'ha arribant a assolir concentracions

Santi Mañosa; Rafael Mateo; Raimon Guitart Bas



Prevención de Trastornos de la Conducta Alimentaria mediante una intervención enfermera a través de Internet  

Microsoft Academic Search

Eating Disorders are an important health problem of our society because of their rising incidence in the last years, as well as their high cost in terms of Public Health. Nowadays the best option to face this problem is through prevention. The objective of the present work is to evaluate if a Web nursing intervention based on Cognitive-Behavioural Therapy can

Esther Quirós Abajo


Conductas alimentarias de riesgo en una muestra de 2.142 adolescentes  

Microsoft Academic Search

Background and objectivesThe aim of this study was to estimate the percentage of adolescents with risk eating behaviours for developing an eating disorder (ED), analyzing the differences in gender, age and body mass index (BMI).

Lidia Pamies-Aubalat; Yolanda Quiles Marcos; Miguel Bernabé Castaño



Evaluación de Insatisfacción Corporal en adolescentes: Efecto de la forma de administración de una escala  

Microsoft Academic Search

Title: Assessment of Body Dissatisfaction in adolescents: effect of the way of administration a scale. Abstract: The aim of this paper is to discover if the way of administration a subscale of evaluation Body Dissatisfac- tion (BD), coming from a wider questionnaire, affects to the tendency of answer. In the investigation participated 147 students of sec- ondary school, age between

José Ignacio Baile; Rosa María Raich; Emilio Garrido; Ayuntamiento de Pamplona



Guia Practica para una Evaluacion Alternativa (Practical Guide to Alternative Assessment).  

ERIC Educational Resources Information Center

Guidance is offered in Spanish on the creation and use of alternative assessment, and a process model is presented that links assessment with curriculum and instruction, based on contemporary theories of learning and cognition. The introductory chapter provides background on the purposes of assessment and the need for new alternatives, with an…

Herman, Joan L.; Aschbacher, Pamela R.; Winters, Lynn


Ricerca di impatti lunari. Caratteristiche dei flash registrati da una telecamera e nuove metodologie di osservazione  

NASA Astrophysics Data System (ADS)

Two techniques are described to validate the video tape record of a lunar flash obtained by a single observer monitoring the dark side of the waxing Moon during a meteor shower. Displacing the video camera from the perfect focus, a disk or an annulus of light is recorded with a refractor or a reflector, respectively, only if it is the image of a real lunar flash. Inserting a spectroscope between the telescope objective and the video camera the spectrum of the flash light is recorded which may give useful informations about the chemistry and the physics of the event. Spurious flashes, normally due to cosmic rays or to camera noise, do not change their aspect in out of focus images nor in the dispersed ray beam.

Lena, Raffaello; Favero, Giancarlo



The Struggle for Mexico's First Gay-Straight Alliance: Como una Novela Real  

ERIC Educational Resources Information Center

In 2004, a group of high school students at a private American school in Mexico City started the first gay-straight alliance in Mexico. A small group of conservative parents and a Mormon principal organized in opposition. This paper details the students' struggle to keep their club and offers lessons learned about student activism, school change,…

Macgillivray, Ian K.



Formulación de una Pasta Gelificada a Partir del Descarte de Arándanos (Vaccinium corymbosum)  

Microsoft Academic Search

A study was developed to formulate a low calorie gelling paste that allows giving aggregate value to discarding blueberries. Eight formulations were done after the characterization of the fruit that shows a high proportion of calcium\\/pectin, of great importance in the gelation capacity. The results show three formulations without significant differences in their shelf life of around forty days, From

Rosemarie Stückrath; Guillermo R. Petzold




Microsoft Academic Search

Objective: To determine the abnormalities in pap smears found in external ambulatory service to pregnant women in Hospital San Jose , Hospital level II Susana Lopez de Valencia and universitary center health Alfonso Lopez de la Universidad del Cauca in

Luis A. Ospina; María Piedad Acosta; Diego Illera


Valoración nutricional de una composta elaborada con subproductos avícolas para alimentar pollos de engorda  

Microsoft Academic Search

The objective of this study was to show the feasibility of producing a poultry -byproduct composter, and to evaluate its potential use in broiler diets. A pathogen -free product containing 32.1% protein, approximately 1,913 kcal of true metabolizable energy (TME), good amino acid, macro- and micromineral contents was obtained by adding water to a mixture of poultry manure, straw and

Ricardo Muñoz Saba; Luis Alberto Heredia; Carlos López Coello; Ernesto Avila; Gonzá le



Microsoft Academic Search

En este artículo se presentan consideraciones que facilitan la implantación de los sistemas de gestión en organizaciones que tienen implantado, o pretenden implantar, el sistema de dirección y gestión empresarial conforme a lo establecido en el decreto No.281 del Comité Ejecutivo del Consejo de Ministros de la República de Cuba y como parte de este los sistemas de control interno

Mayra R. Moreno Pino; María del Carmen Proenza Rivas; Martín Alberto Ayala López; Rossio Coya Cáceres; Iosvani Segura Leyva



Magnificación de espermatozoides: una nueva visión del factor masculino en reproducción asistida  

Microsoft Academic Search

In recent years, several studies have analyzed spermatozoa using high magnification microscopy. All these studies have found a clear link between the presence of vacuoles in the head of spermatozoa and pregnancy and abortion rates, as well as an increase in the percentage of DNA fragmentation. Indeed, sperm morphology and the presence or absence of nuclear vacuoles seems to reflect

Olga Cairó Doncos; Laura Prats Ruiz; Sergio Rovira Fontanals; María Rodríguez Agüera; Arturo Brassesco Macazzaga; Felipe del Río Bueno; Ana Monqaut; Gemma López Granollers; Mario Brassesco Macazzaga




Microsoft Academic Search

Esta investigación tuvo como objetivo determinar las características del proceso instruccional en la tercera etapa del nivel de Educación Básica que contribuyen al desarrollo del pensamiento crítico del estudiante para satisfacer el imperativo legal vigente desde julio de 1980, particularmente para el área curricular Estudios Sociales. Durante cuatro años escolares en dos instituciones educativas que ofrecen el precitado nivel se

Haydée Páez



Microsoft Academic Search

Human emotional interchange implicates expression\\/recognition of emotions. The human face is a conspicuous place to express\\/read emotion. Certain emotions associate with emotional tearing, differentiable from basal and reflex tearing. Murube, Murube and Murube (1999) classified emotional tearing in requesting- and offering -help. The validity of that typology was evaluated using faces of people of both sexes crying because of their



Realismo Sistémico Estructural. Hacia una teoría totalizadora de las Relaciones Internacionales  

Microsoft Academic Search

If one wants to design a foreign policy, first have to understand the functioning of the world system in which is inserts the country. One cannot take decisions in the frame of a system of whose operation one has an \\

Luis Dallanegra Pedraza



Hipertensión arterial, medicación antihipertensiva y disfunción eréctil: una perspectiva basada en la evidencia  

Microsoft Academic Search

BackgroundErectile dysfunction (ED) is frequent in hypertensive men. Antihypertensive drugs, especially diuretics and ?-blockers, have often been reported to be ED inducers, which can lead to non-compliance with medication.

M. Mas




Microsoft Academic Search

Regional variables associated with high blood pressure in Argentina. We conducted a study in a random sample of 1523 inhabitants (15-75 years old) of Rauch city to determine risk factors prevalence to development hypertension and cardiovascular diseases. We measured blood pressure, weight, height, waist circumference, cholesterol and glucose levels, sodium excretion, and alcohol and tobacco consumption. We found a high




El embarazo en la adolescencia como problema público: una visión crítica  

Microsoft Academic Search

The present work is a review of the most commonly used arguments to define pregnancy during adolescence as a pub- lic problem: its supposed increase, contribution to acceler- ated population growth, adverse effects on maternal and child health and contribution to the persistence of poverty. Some elements are proposed for an alternative explanation with the intention of defining with more




Una perspectiva de los biomateriales vista desde un diseño específico: la prótesis total de cadera  

Microsoft Academic Search

The total hip implant, characteristic design of a functional articulation, has suffered extensive modifications since the first arthroplasty implanted by John Charnley, at 1950, using a cement bone paste of methilmetaacrilate (PMMA). Today, the state-of-the-art of such a design includes a series of biomaterials in different presentations, in order to obtain the maximum fiability. These biomaterials typically employs metallic alloys

Alejandro Echavarría


Distribución geográfica del género Gyriosomus Guérin-Méneville, 1834 (Coleoptera: Tenebrionidae): una aproximación biogeográfica  

Microsoft Academic Search

A parsimony analysis of areas of endemism for the monophyletic genus Gyriosomus, an eremic and endemic element of the northern coast of Chile, was performed. We tested that: (i) distributional patterns of Gyriosomus species are determined by environmental heterogeneity, and that (ii) discontinuities in the distribution of Gyriosomus species will reflect areas of endemism. We identified areas of endemism for




Use of a Telecamera as a Contrast Monitor USO di Una Telecamera Come Monitor di Contrasto.  

National Technical Information Service (NTIS)

An automatic system is described for aiding photographic surveys of the solar photospheric granulation which significantly influence the conditions for viewing. The emitted signals from a telecamera, and characteristics of a suitable optical system are an...

V. Croce G. A. Debiase F. Fabbri M. F. Toniolo



Validacion de Una Version Preliminar del Child Abuse Potential Inventory para su Uso en Argentina.  

ERIC Educational Resources Information Center

The validity of the Child Abuse Potential (CAP) Inventory was tested with a sample of 40 child physical abusers and 40 nonabusers in Argentina. More than 97% of subjects were correctly classified as abusing or nonabusing individuals. The article is in Spanish. (CR)

Bringiotti, Maria Ines; Barbich, Alejandra; De Paul, Joaquin



Variation in growth and diterpene lactones among field-cultivated Andrographis paniculata  

Microsoft Academic Search

Seed-raised Andrographis paniculata (Acanthaceae) from 28 accessions were grown in a randomized complete block design to determine morphological characteristics\\u000a and diterpene contents. The average amount of dried leaves per individual was between 2.13 and 8.23 g. The average andrographolide\\u000a content varied from 12.44 to 33.52 mg\\/g dried leaves and 14-deoxy-11,12-didehydroandrographolide content varied from 0.23\\u000a to 2.08 mg\\/g dried leaves. The differences in phytomass

Sompop Prathanturarug; Noppamas Soonthornchareonnon; Wongsatit Chuakul; Promjit Saralamp



Elastomeri proprieta' termodinamiche ed effetto termoelastico di una struttura complessa : teoria e prove termovisive sperimentali per una analisi di fattibilita'. (Thermodynamical properties and thermoelastic coupling of complex macroscopic structure).  

National Technical Information Service (NTIS)

Gross qualitative/quantitative analysis about thermodynamical properties and thermoelastic coupling (or elastocaloric effect) of complex macroscopic structure (running shoes) is performed by infrared camera. The experimental results showed the achievabili...

M. Fabbri A. Sacripanti



Informe Anual a la Nación indica una reducción en los índices de incidencia y mortalidad por cáncer; una sección especial revela amplias variaciones en las tendencias del cáncer de pulmón en los estados

Un nuevo informe de las principales organizaciones oncológicas del país muestra que, por primera vez desde la primera publicación del informe en 1998, tanto el índice de incidencia como el de mortalidad para todos los cánceres combinados están disminuyendo en hombres y mujeres.


La Migracion Como Una Transicion Critica para la Persona en Su Ambiente. Una Interpretacion Organismico Evolutiva. (Migration as a Critical Person-in-Environment Transition: An Organismic-Developmental Interpretation.)  

ERIC Educational Resources Information Center

In order to explore some of the changes and stresses connected with migration and return migration, a study was conducted among migrants returning from the United States mainland to Puerto Rico. The sample consisted of 75 adolescents participating in a Bilingual Education program in Puerto Rico. Data were collected using Psychological Distance…

Pacheco, Angel M.; And Others



Microsoft Academic Search

This essay studies the use of films as a didactic resource for the analysis of discrimination at school. After an approach to the issue of discrimination, it explores the possibilities of films to in relation with specific didactic criteria. Finally, it tells about a specific experience aimed at the first years in Primary Education.




Microsoft Academic Search

La plantación azucarera comienza su expansión en Cuba a mediados de la década del ’60 del siglo XVIII. El aumento de la demanda y, por consiguiente, de los precios del azúcar en el mercado internacional favoreció el auge de esa rama de la economía nacional.

Javier Figueroa Ledón



Los Asentamientos Campesinos: Una Experiencia Panamena en Reforma Agraria (Rural Settlements: An Experiment on Agrarian Reformation in Panama).  

National Technical Information Service (NTIS)

The situation of the Panama rural population is analyzed through historical periods. The marked differences between the two zones of the country; the more sophisiticated area crossed by the Canal and the hinterland of the interior are contrasted. Comparis...

S. Heckadon




Microsoft Academic Search

Total Pb, Cd, Cu, Ni and Zn concentrations and the distribution of lead in soils from a farmland near a battery recycling plant in Madrid (Spain) were investigated to establish a possible relationship with a recent episode of horses death that presented lead intoxication symptoms before dying. Total Pb and Cd levels presented a clear decrease with distance to the

Victoria CALA; Yukihiko KUNIMINE


Una nueva aproximación a la optimización terapéutica del diclofenaco A novel approach towards therapeutic optimization of diclofenac  

Microsoft Academic Search

ABSTRACT ABSTRACT ABSTRACT ABSTRACT In an effort for obtaining compounds with lower gastric toxicity than diclofenac, five different N,N- In an effort for obtaining compounds with lower gastric toxicity than diclofenac, five different N,N- In an effort for obtaining compounds with lower gastric toxicity than diclofenac, five different N,N- In an effort for obtaining compounds with lower gastric toxicity than



Compartiendo la Ciencia con los Ninos: Una Guia para los Padres (Sharing Science with Children: A Guide for Parents).  

ERIC Educational Resources Information Center

This guide offers Spanish-speaking parents ways in which they can help their children learn about science at home and in the community. Science is a way of looking at the world. It uses everyday techniques such as observation and classification to give us information about things and how they work. Advice to parents that want to support their…

North Carolina Museum of Life and Science, Durham.


Ideación Suicida, Depresión, Actitudes Disfuncionales, Eventos de Vida Estresantes y Autoestima en una Muestra de Adolescentes Puertorriqueños\\/as  

Microsoft Academic Search

Suicide in children and adolescents constitutes a serious mental health problem whose frequency has increased during the last 5 years. Some of the variables associated to suicide risk are depressive symptomatology, low self- esteem, dysfunctional attitudes, and negative life events. The present study examined the relationship between suicide ideation, depression, self-esteem, dysfunctional attitudes and negative life events in a clinical

Jeannette Rosselló; Mayra N. Berríos Hernández



134 casos consecutivos de revascularización carotídea mediante angioplastia y stent en un centro de referencia: ¿una técnica de riesgo?  

Microsoft Academic Search

IntroductionCarotid revascularisation (CR) using angioplasty and stent (ASC) is an effective procedure in the prevention of ischaemic stroke, but with a controversial morbidity and mortality in the different studies conducted in this field.

G. Parrilla; J. Zamarro; M. Espinosa de Rueda; A. Lüttich; M. Garrote; A. Morales; B. Escribano; C. Lucas; F. Martínez García; R. Hernández-Clares; J. López; I. Villegas; T. Tortosa; A. Moreno



Tensión diplomática entre Colombia y Ecuador durante 2006-2009: una mirada desde la teoría de juegos  

Microsoft Academic Search

Resumen Este documento centra su análisis en la tensión diplomática que sostuvieron Colombia y Ecuador durante el periodo 2006-2009, a partir de las fumigaciones aéreas que Colombia realizó en la zona de frontera con el territorio ecuatoriano, así como el ataque realizado por el ejército colombiano al campamento de las Fuerzas armadas revolucionarias de colombia (Farc), en donde fue abatido

Santiago Arroyo Ma; Juan D. Bolañosb



Una vision holistica de la educacion superior en contextos posmodernos (The Integrative Conception of Postmodern Higher Education).  

ERIC Educational Resources Information Center

This paper argues that current "postmodern" conditions demand a rethinking of higher education, especially in countries like Mexico. This would involve the rapprochement of science, technology, and the humanities, based on the belief that the chasm separating them, apart from being artificial, is no longer socially viable. Through a critical…

Zoreda, Margaret Lee; Zoreda-Lozano, Juan Jose


Educacion Ambiental en las Escuelas: Creando una Programa que Funcione! (Environmental Education in the Schools: Creating a Program That Works!).  

ERIC Educational Resources Information Center

This book is a manual that enables teachers to formulate an effective program of environmental education across multiple grade levels and cultural settings. A section provides tips for using the book, followed by nine chapters dealing with different aspects of developing and implementing an environmental education program. Chapter 1 presents a…

Braus, Judy A.; Wood, David


Tratamiento quirúrgico de una hiperplasia fibrosa localizada en la desembocadura del conducto de Estenon. Descripción de la técnica  

Microsoft Academic Search

The fibrous hyperplasia is an exofitic injury circumscribed and formed by dense fibrous conective weave, covered by epithelio squamous stratified. lt is located with more frequency in the buccal mucosa, gingiva, tongue and soft palate, generally zones where greater rubbing takes place, since his etiopathogenia seems to be related to chro­ nic irritatives or traumatic repeated factors. The treatment is

Camacho Alonso F; Saura Inglés A; López Jornet P; Bermejo Fenoll A



PubMed Central

Resumen A partir de un relevamiento de tipo etnográfico, se describen lugares de encuentro de HSH en la Ciudad de Buenos Aires y sus prácticas sexuales. El reconocimiento de tales espacios, así como las características que asumen en ellos los encuentros sexuales entre los HSH, plantean obstáculos específicos en la adopción de comportamientos preventivos y, asimismo, generan nuevos desafíos para las actividades de prevención. Se plantean las dificultades y debates conceptuales que la misma categoría presenta, y sus consecuencias en el abordaje preventivo y teórico-metodológico para las ciencias sociales. Además, se proponen nuevos interrogantes acerca de los alcances y las limitaciones del modelo preventivo del VIH/Sida para HSH.

Barreda, Victoria; Carballo-Dieguez, Alex; Marone, Ruben; Balan, Ivan; Pando, Maria Angeles; Avila, Maria Mercedes



Una nota sobre la sostenibilidad fiscal y el nexo entre los ingresos y gastos del Gobierno Colombiano  

Microsoft Academic Search

En este trabajo se analiza empíricamente la sostenibilidad fiscal en Colombia a través de las técnicas de cointegración. En particular, usando los ingresos tributarios y los gastos primarios del gobierno nacional central para el período 1990Q1 a 2008Q4 (datos reales y ajustados por el ciclo económico), en el documento se examina si las cuentas fiscales del gobierno han sido sostenibles

Ignacio Lozano; Enrique Cabrera



La restricción intertemporal del presupuesto. Una evaluación empírica para el Gobierno Nacional Central de Colombia, 1950-2010  

Microsoft Academic Search

En este documento se analiza la sostenibilidad fiscal del Gobierno Nacional Central en Colombia utilizando el enfoque de la Restricción Intertemporal de Presupuesto. Los resultados empíricos revelan que la estrategia fiscal actual es sostenible. No obstante, se vislumbran problemas de insolvencia en el largo plazo, lo que implica generar un mayor superávit primario en comparación con el actualmente programado. Lo

Álvaro Hernando Chaves



GOBIERNO CORPORATIVO EN LA EMPRESA FAMILIAR. Una Arquitectura de Organización orientada a la supervivencia de la Empresa Familiar  

Microsoft Academic Search

Para superar la crisis de delegación y avanzar hacia nuevas etapas de desarrollo que faciliten la separación de la propiedad y el control, las Empresas Familiares necesitan realizar la consolidación de las instituciones de gobierno corporativo y familiar. En este trabajo progresamos sobre aspectos particulares de la arquitectura de la organización que facilitan la afirmación de dichas instituciones. Para ello

Ernesto A. Barugel



Acuerdos entre el gobierno central y los departamentos: una propuesta para aumentar la eficiencia del gasto público  

Microsoft Academic Search

El objetivo de este trabajo es proponer un instrumento para el seguimiento de la eficiencia del gasto público. El instrumento muestra que el gobierno central se puede apoyar en las administraciones departamentales con el fin de medir los productos del gasto. La idea central de la propuesta es que los objetivos de productividad acordados entre el nivel nacional y el

Isaac de León-Beltrán; Diego Jaramillo



Gestión de la calidad en una unidad de cuidados intensivos: implementación de la norma ISO 9001:2008  

Microsoft Academic Search

The Quality Management Systems make it possible to prioritize actions to maintain the safety and efficacy of health technologies. The Intensive Care Unit of our hospital has implemented a quality management plan, which has obtained accreditation as “Service Certificate that manages its activities according to UNE-EN ISO 9001:2008” standard. With the application of quality management system, it has been possible

R. Lorenzo Torrent; M. Sánchez Palacios; L. Santana Cabrera; J. L. Cobian Martinez; C. García del Rosario



Realizzazione di una cella per misure di spettroscopia molecolare a temperatura variabile. (Optical cell for variable temperature molecular spectroscopic measurement).  

National Technical Information Service (NTIS)

This paper reports on the design and construction of a 20 cm long optical cell whose temperature can be changed continuously between 50 and 350 degrees K. The cell is cooled by a single stage cryogenerator and thermo-regulated with an electrical feedback ...

G. Baldacchini A. Bellatreccia P. Cardoni I. Cenciarelli F. D'Amato



Detección inmunoenzimática de la toxina de la bacteria Clostridium tetani: una alternativa a las pruebas biológicas con ratones  

Microsoft Academic Search

Immunoenzimatic detection of the Clostridium tetani bacterial toxin: an alternative to mice bioassays. Cell-free extracts from 20 strains of Clostridium tetani isolated from soil samples, were tested for tetanus toxin production using an enzyme immunoassay. All the extracts were classified as positive for the toxin presence, and eight of them showed absorbance values corresponding to tetanus toxin concentrations between 3.2

Fernando Chaves; Guillermo León; Francisco Hernández-Chavarría


Promoviendo una Alimentaci?n Saludable (PAS) Design and Methods: Engaging Latino Families in Eating Disorder Treatment  

PubMed Central

The use of culturally sensitive intervention could improve mental health care for the eating disorders treatment in the Latino population. The aim of this report is to describe the rationale, design, and methods of the ongoing study entitled “Engaging Latino families in eating disorders treatment.” The primary aim of the study is to compare (a) the combined effect of individual cognitive behavioral therapy for bulimia nervosa (CBT-BN) that has been previously adapted for the Latino population plus Family Enhanced (FE) modules, with (b) the standard adapted individual CBT-BN in a proof-of-principle study with 40 Latina adults with eating disorders and one relative or significant other per patient. We hypothesize that 1) the feasibility, acceptability, and adherence of participants in CBT-BN+ FE will be superior to individual CBT-BN only; 2) relatives in CBT-BN+ FE will report greater treatment satisfaction, greater reduction in family conflict, and greater decreases in caregiver burden than relatives in the individual CBT-BN only condition; and 3) patients who participate in CBT-BN+ FE will show trends towards greater decreases in ED symptoms compared with patients in CBT-BN only; although power will be limited to detect this difference. However, we predict that they will show greater retention in treatment, greater treatment satisfaction, and greater decreases in family conflict than patients in CBT-BN only. The completion of this investigation will yield important information regarding the acceptability and feasibility of a culturally sensitive evidence-based treatment model for Latinos with eating disorders. (Word Count=240)

Reyes-Rodriguez, Mae Lynn; Bulik, Cynthia M.; Hamer, Robert M.; Baucom, Donald H.



Books in Spanish for Children and Young Adults: An Annotated Guide (Libros Infantiles y Juveniles en Espanol: Una Guia Anotada).  

ERIC Educational Resources Information Center

Intended to aid teachers, librarians, and others in the selection of Spanish-language books for children in grades K-12, the annotated guide includes books by Hispanic authors which highlight the lifestyle, folklore, heroes, history, fiction, poetry, theatre, and classical literature of Hispanic cultures. Most books included in the guide have been…

Schon, Isabel


Intensive Behavioral Intervention for School-Aged Children with Autism: Una Breccia nel Muro (UBM)--A Comprehensive Behavioral Model  

ERIC Educational Resources Information Center

Although, reviews and outcome research supports empirical evidence for Early Intensive Behavior Intervention in pre-scholars, intensive behavioral service provision for school-aged children with autism spectrum disorders (ASD) are less subject to research studies. In order to provide effective behavioral interventions for school-aged children it…

Fava, Leonardo; Vicari, Stefano; Valeri, Giovanni; D'Elia, Lidia; Arima, Serena; Strauss, Kristin



Una aplicación de la escala de fobia a los alimentos nuevos. El caso de los alimentos étnicos  

Microsoft Academic Search

RESUMEN: El artículo investiga las actitudes de los consumidores hacia los alimentos nuevos mediante la escala FNS (Food Neo-phobia Scale). A partir de ella se obtiene el perfil de los individuos más y menos proclives a la introducción de nuevos alimentos en sus dietas, denominados respectivamente, «neo-fíli- cos» y «neo-fóbicos». Entre estos alimentos nuevos, los étnicos o propios de un

Dena M. Camarena; Ana I. Sanjuán


¿Ha mejorado la dotación de vitamina D 3 en España? Actuales niveles en una muestra de la población  

Microsoft Academic Search

IntroductionAccording to current classifications, the metabolite of greatest clinical interest to evaluate vitamin D3 dosage is 25-hydroxyvitamin D3 with a reference interval of approximately 10–70ng\\/ml, although many authors consider values of approximately 40ng\\/ml or 100nmol\\/l to be desirable. According to these definitions, three out of four people in Spain would have vitamin D3 deficiency.

Milagros Bernal Pérez; Giovanna Cortés Flores; Armando Giner Soria; Isabel Orden Gonzalo; Marcial Horno Pérez; Isabel Benedicto Lorenzo



Geologic Studies on the Rio Una Region (Iguape - Sao Paulo County), Brazil, for the Construction of Nuclear Power Plants.  

National Technical Information Service (NTIS)

The main objective of the project was the geological and seismological characterization of 230 Km sup 2 along the coastal region between the Barro Branco and Jureia massifs in order to pinpoint one or more local areas showing adequate geological, morpholo...

S. Hassano M. Mueller J. H. Stein



Alcune proprietà di una classe di procedimenti iterativi approssimati connessi con trasformazioni più generali delle contrazioni, in uno spazio metrico  

Microsoft Academic Search

\\u000a Summary  In this paper, we study a class of iterative processes of the type yn+1\\u000a =Tnyn, which approximate the iterative processes xn+1\\u000a =Txn, where T and Tn are more general operators than contractions in a metric space.

A. Pasquali



Hacia una adaptaci?n cultural para el tratamiento de trastornos alimentarios en latinos en Estados Unidos  

PubMed Central

Eating disorders affect all ethnic and socioeconomic groups. However, evidence based treatments for eating disorders have been developed and tested exclusively on Caucasian populations. With the purpose to develop a culturally sensitive framework for the eating disorders treatment in Latinos/as, the objectives of this work were: 1) identify and describe some of the relevant cultural elements for eating disorders in the Latino population and, 2) to draft a culturally sensitive intervention model for eating disorders in Latino population in the United States. Providing culturally sensitive treatments for Latinos with psychiatric disorders is essential to reverse public health disparities.

Reyes-Rodriguez, Mae Lynn; Bulik, Cynthia M.



Una metodologÌa para sectorizar pacientes en el consumo de medicamentos aplicando datamart y datamining en un hospital  

Microsoft Academic Search

The present work, provides a method for the analysis of data in the way with which the medicines in a Peruvian hospital are consumed, in order to identify some nonobservable realities or characteristics which would produce shortage of supplies or insatisfaction of patient, serving as a tool for the decision making on the medicine supplying in the hospital. Here techniques

Ivan Tapia Rivas; Ruiz River; Edgar Ruiz Lizama




Microsoft Academic Search

SUMMARY In the present review the technical aspects about a genetically modified plants and their construction (with the different used tech- niques) from transformation to regeneration of the plant, are dis- cussed. It is also discussed, from a critical and technical point of view, some of the myths frequently associated with the risks and be- nefits about the use of

Francisco José Fernández Perrino




Microsoft Academic Search

The teaching of Graphic Expression in the technical programs of universities has improved last years. The arrival of new technologies have helped in this evolution, and as a result, it is crucial to understand the teaching and learning of this subject. In this communication, we present a novel web-based application that is usefull to help both teaching and learning of

Melchor García Domínguez; Gerardo Martín Lorenzo; José Pablo Suárez Rivero; José Pérez Bermúdez; Francisco Suárez Benítez



Microsoft Academic Search

To know the biological characteristics of a strain of Trypanosome cruzi, coming from the district of Tiabaya, Arequipa, Peru, and to determine the survival of inoculated mice relating the infecting dose ante and sex. Were used 14 BALB\\/C-53 mice (males and females) of 30 days of age as biological model. The groups I and II were inoculated via intraperitoneum with

Nicolás Suárez; Rufino Cabrera; Luis Cartagena; Rolando Ayaqui



Imaginarios sobre inmigración peruana en la prensa escrita chilena: una mirada a la instalación de la agenda de la diferencia  

Microsoft Academic Search

Build and install the media agenda in the public opinion is well know routine exercise in the written press. This article works its relationship with immigration and how it represents and is marking its footprint in the chilean press. Peruvian immigration and a look at the press coverage are chosen to reflect a relationship that comes to stress the concept


Gli indici di colore come indicatori del meccanismo che governa la luminosità di una cometa: luce solare riflessa o fluorescenza  

NASA Astrophysics Data System (ADS)

Colour indexes derived by aperture photometry on cometary comae in VRI Johnson/Cousins bands give a way to understand the mechanism dominating the brightness of a comet: reflected sunlight or fluorescence. Considering that V band is dominated by C2 gas emission and that R and I on the contrary have few gas contamination, the colour index determined as a function of the coma diameter is a key parameter. In an hypothetical purely dusty coma we expect a constant colour index close to the solar one and nearly constant with aperture. If gas is present we can have a differentiation within the coma and a non constant colour index, in this case the colour index is "bluer" in the external halo. The effect was clearly observed in C/2001 A2 and C/2000 WM1.

Milani, Giannantonio; Sostero, Giovanni



Extenso estudio realizado en muchos centros demuestra que hay una precisión comparable de la colonoscopia virtual con la colonoscopia convencional

Según los resultados del Estudio Nacional de Colografía de Tomografía Computarizada de la American College of Radiology Imaging Network, ACRIN, la colografía de tomografía computarizada, también conocida como colonoscopia virtual, es comparable a la colonoscopia convencional en su capacidad para detectar con precisión cáncer y pólipos precancerosos y podría servir como examen selectivo inicial de detección de cáncer colorrectal. La colonoscopia convencional usa un tubo largo, flexible, con cámara, para ver el revestimiento del colon.


Cuando su Nino esta Desaparecido: Una guia de Supervivencia Familiar (When Your Child is Missing: A Family Survival Guide).  

National Technical Information Service (NTIS)

Each year, nearly 1.3 million children are reported missing. Although the unforeseen absence of a child is always upsetting, fortunately most missing children are returned home in a short period of time. This fact, however, provides little consolation for...



La dinámica de las publicaciones y las patentes como una aproximación al desarrollo científico y tecnológico de los países  

Microsoft Academic Search

The purpose of this paper is to propose a characterization, different from the traditional ones, of developed and developing countries, in terms of science and technology. First, we identify the generating processes of the publication and patent series of the countries. Then we relate the development stages of the countries (Banze (2000)) with the dynamics of the series. The results

Clemente Forero; Andrés Zambrano



Una verifica empirica del modello Domanda-Controllo-Sostegno Sociale: effetti sul burnout e sulla somatizzazione tra il personale infermieristico  

Microsoft Academic Search

AN EMPIRICAL INVESTIGATION OF THE DEMAND- CONTROL-SOCIAL SUPPORT MODEL: EFFECTS ON BURNOUT AND ON SOMATIC COMPLAINTS AMONG NURSING STAFF. The present study investigated the relationship between job characteristics and well-being dimensions (burnout and somatic complaints) in a group of 271 nurses. The study, based on Karasek and Theorell's theoretic model of demand-control-social support, aimed to test the following hypotheses: a)

R. Pisanti




Microsoft Academic Search

Con la finalidad de abordar y analizar los elementos que sustentan la necesidad de integrar la dimensión ambiental al proceso de desarrollo de las competencias laborales, se valora la relación de la especie humana con el medio ambiente a escala mundial, su estado y propósito en Cuba, abordándose la necesidad de desarrollar el Capital Humano dentro de la cultura ambiental

Ana Victoria Nápoles Villa; Clara Marrero Fornaris



Transformaciones en el Discurso sobre la Epidemia al VIH como una Epidemia Sexuada - Paradojas y Enigmas en la Respuesta Global  

Microsoft Academic Search

Así como el discurso sobre sexualidad experimentó la influencia central de los procesos técnicos y políticos generados por la epidemia, igualmente el discurso global sobre la epidemia de SIDA a lo largo de tres décadas ha sido marcado por estos momentos cambiantes en el discurso sobre la sexualidad y su diversidad. Desde un momento inicial en que el SIDA fue

Carlos F. Cáceres


Iridio: Una opción para medir el potencial redox Iridium: An option for measurement of the redox potential  

Microsoft Academic Search

Some relevant results are presented of research leading to an alternative redox electrode to platinum. Several different electrodes were subjected to experiments under controlled conditions, mainly in artificial seawater. Among those tested were platinum, graphite, glassy carbon, gold and iridium. Our results, when combined with those estimated by using a model based on the MINEQL+ program, suggest that the O2\\/H2O2

Lorena M. Ríos-Mendoza; J. Vinicio Macías-Zamora; Alberto R. Zirino-Weiss; Naval Command



Solar Energy Preliminary Study: A Self-Supplied Measurement Station Studio Preliminare Sull Energia Solare: Una Stazione di Misura Autoalimentata.  

National Technical Information Service (NTIS)

Prospects and perspectives of photovoltaic cells as solar generators are reviewed. An electronic device was designed and constructed in order to measure and record time performance of two silicon photovoltaic cell panels and to compare the performance of ...

G. Balestrino A. Egidi G. V. Pallottino



Validacion de Una Version Preliminar del Child Abuse Potential Inventory para su Uso en Argentina.  

ERIC Educational Resources Information Center

The validity of the Child Abuse Potential (CAP) Inventory was tested with a sample of 40 child physical abusers and 40 nonabusers in Argentina. More than 97% of subjects were correctly classified as abusing or nonabusing individuals. The article is in Spanish. (CR)

Bringiotti, Maria Ines; Barbich, Alejandra; De Paul, Joaquin



Niveles de humedad, tomada con sonda T.D.R., en una parcela experimental de Cartaya (Huelva)  

Microsoft Academic Search

Geostatistical techniques were applied to the study of the soil moisture distribution measured with TDR probes. The sampling took place in a experimentatal field planted with Stevia rebaudiana Bertoni under two different water regimes, (humid one and dry). Results show that, in the first crop stage, which is that of establishment of the crop in the field, the levels of

D. L. Orihuela; J. Palazón; D. Gallardo; A. González; E. Romero; R. Garrido


Accettabilita' sociale di una tecnologia: Il caso Rete 2. (Case of study Rete 2: Social acceptability of technology).  

National Technical Information Service (NTIS)

In a society, characterized by sudden innovative processes, studying social controversies of technological order assumes a specific meaning. Within these limits, the present case study - named Rete 2 - is representative in order to compile a first analysi...

S. Ciampi T. D. Valentini



Screening of plants acting against Heterometrus laoticus scorpion venom activity on fibroblast cell lysis.  


The aqueous extracts of 64 plant species, listed as animal- or insect-bite antidotes in old Thai drug recipes were screened for their activity against fibroblast cell lysis after Heterometrus laoticus scorpion venom treatment. The venom was preincubated with plant extract for 30 min and furthered treated to confluent fibroblast cells for 30 min. More than 40% efficiency (test/control) was obtained from cell treatment with venom preincubated with extracts of Andrographis paniculata Nees (Acanthaceae), Barringtonia acutangula (L.) Gaertn. (Lecythidaceae), Calamus sp. (Palmae), Clinacanthus nutans Lindau (Acanthaceae), Euphorbia neriifolia L. (Euphorbiaceae), Ipomoea aquatica Forssk (Convolvulaceae), Mesua ferrea L. (Guttiferae), Passiflora laurifolia L. (Passifloraceae), Plectranthus amboinicus (Lour.) Spreng. (Labiatae), Ricinus communis L. (Euphorbiaceae), Rumex sp. (Polygonaceae) and Sapindus rarak DC. (Sapindaceae), indicating that they had a tendency to be scorpion venom antidotes. However, only Andrographis paniculata and Barringtonia acutangula extracts provided around 50% viable cells from extract treatments without venom preincubation. These two plant extracts are expected to be scorpion venom antidotes with low cytotoxicity. PMID:16169172

Uawonggul, Nunthawun; Chaveerach, Arunrat; Thammasirirak, Sompong; Arkaravichien, Tarinee; Chuachan, Chattong; Daduang, Sakda



Hepatoprotective effect of poly herbal formulation against various hepatotoxic agents in rats  

PubMed Central

Background: Individually Andrographis paniculata Nees. (Acanthaceae), Phyllanthus niruri Linn.(Euphorbiaceae) and Phyllanthus emblica Linn. single plant extracts have been reported to have hepatoprotective activity. However, literature survey shows that no sufficient scientific data has been publish on pharmacological evaluation of these plants in combined form. Method: Hepatoprotective activity of the polyherbal hepatoprotaective formulation (PHF)-containing spray-dried aqueous extracts of Andrographis paniculata Nees. (Acanthaceae), Phyllanthus niruri Linn. (Euphorbiaceae) and Phyllanthus emblica Linn. (Euphorbiaceae), was screened against paracetamol, carbon tetrachloride (CCl4), and ethanol-induced hepatic damage in rats. PHF was evaluated by measuring levels of serum marker enzymes like SGOT, SGPT, ALP, direct bilirubin (DB), and lactate dehydrogenase (LDH). The histological studies were also studied support the biochemical parameters. Silymarin was used as standard drug. Results: Administration of PHF (100 and 200 mg/kg p.o.) significantly inhibited paracetamol, CCl4 and ethanol-induced elevation levels of SGPT, SGOT, ALP, DB and LDH. A comparative histopathological study of liver exhibited almost normal architecture as compared to toxicant group. Conclusion: Results suggests that the hepatoprotective effects of PHF might be useful for liver protection due to combined action of all plant extracts along with their phytoconstituents.

Tatiya, Anil U.; Surana, Sanjay J.; Sutar, Manisha P.; Gamit, Nehal H.



Leaf chemistry and foliage avoidance by the thrips Frankliniella occidentalis and Heliothrips haemorrhoidalis in glasshouse collections.  


Observational studies on foliage avoidance by the polyphagous thrips species Frankliniella occidentalis (Pergande) and Heliothrips haemorrhoidalis (Bouché) (Thysanoptera: Thripidae) identified six non-host species (Allagopappus dichotomus (Asteraceae), Gardenia posoquerioides (Rubiaceae), Plectranthus aff. barbatus, Plectranthus strigosus, Plectranthus zuluensis (Lamiaceae), and Sclerochiton harveyanus (Acanthaceae) among plants growing within a major glasshouse botanical collection. The effects of sequentially obtained acetone and aqueous methanol leaf extracts on mortality in first instar Frankliniella occidentalis were assessed. The acetone leaf extract of Sclerochiton harveyanus, which had the highest activity against the thrips, yielded four new iridoids, sclerochitonosides A-C, and sclerochitonoside B 4'-methyl ether. Mortality of F. occidentalis was increased on exposure to all four iridoids, and the most active iridoid was sclerochitonoside A (8-epiloganic acid 4'-hydroxyphenylethyl ester). Choice experiments demonstrated that this compound did not significantly deter H. haemorrhoidalis from treated leaf surfaces. The significance of iridoids in the defense mechanism of plants against thrips is discussed. PMID:21331569

Brown, Alison S Scott; Veitch, Nigel C; Simmonds, Monique S J



Lignans and triterpenes from the root of Pseuderanthemum carruthersii var. atropurpureum.  


Two new lignans, pseuderesinol (1), pseuderanoside (2) and a new triterpene, pseuderanic acid (3) were isolated from the dried root of Pseuderanthemum carruthersii (SEEM.) GUILL. var. atropurpureum (BULL.) FOSB. (Acanthaceae), together with ten known compounds, including five lignans, (+)-eudesmin (4), (+)-magnolin (5), (+)-syringaresinol (6), (+)-episyringaresinol (7), (+)-1-hydroxysyringaresinol (8) and five triterpenes, squalene (9), oleanolic acid (10), lupeol (11), betulin (12), betulinic acid (13). Their chemical structures were elucidated by 1D- and 2D-NMR, computational quantum chemistry, as well as high resolution-electrospray ionization (HR-ESI)-MS spectroscopic analysis. The acetylcholinesterase inhibition and cytotoxic activities against HeLa and MCF-7 cancer cell lines were evaluated on some purified compounds at the concentration of 100 µg/mL. Pseuderesinol (1) and magnolin (5) exhibited moderate cytotoxic activities against the MCF-7 cancer cell line. PMID:22976320

Vo, Thi Nga; Nguyen, Phi Linh; Tuong, Lam Truong; Pratt, Lawrence Michael; Vo, Phung Nguyen; Nguyen, Kim Phi Phung; Nguyen, Ngoc Suong



Experimental and Clinical Pharmacology of Andrographis paniculata and Its Major Bioactive Phytoconstituent Andrographolide  

PubMed Central

Andrographis paniculata (Burm. F) Nees, generally known as “king of bitters,” is an herbaceous plant in the family Acanthaceae. In China, India, Thailand, and Malaysia, this plant has been widely used for treating sore throat, flu, and upper respiratory tract infections. Andrographolide, a major bioactive chemical constituent of the plant, has shown anticancer potential in various investigations. Andrographolide and its derivatives have anti-inflammatory effects in experimental models asthma, stroke, and arthritis. In recent years, pharmaceutical chemists have synthesized numerous andrographolide derivatives, which exhibit essential pharmacological activities such as those that are anti-inflammatory, antibacterial, antitumor, antidiabetic, anti-HIV, antifeedant, and antiviral. However, what is noteworthy about this paper is summarizing the effects of andrographolide against cardiovascular disease, platelet activation, infertility, and NF-?B activation. Therefore, this paper is intended to provide evidence reported in relevant literature on qualitative research to assist scientists in isolating and characterizing bioactive compounds.

Jayakumar, Thanasekaran; Hsieh, Cheng-Ying; Lee, Jie-Jen; Sheu, Joen-Rong



Experimental and Clinical Pharmacology of Andrographis paniculata and Its Major Bioactive Phytoconstituent Andrographolide.  


Andrographis paniculata (Burm. F) Nees, generally known as "king of bitters," is an herbaceous plant in the family Acanthaceae. In China, India, Thailand, and Malaysia, this plant has been widely used for treating sore throat, flu, and upper respiratory tract infections. Andrographolide, a major bioactive chemical constituent of the plant, has shown anticancer potential in various investigations. Andrographolide and its derivatives have anti-inflammatory effects in experimental models asthma, stroke, and arthritis. In recent years, pharmaceutical chemists have synthesized numerous andrographolide derivatives, which exhibit essential pharmacological activities such as those that are anti-inflammatory, antibacterial, antitumor, antidiabetic, anti-HIV, antifeedant, and antiviral. However, what is noteworthy about this paper is summarizing the effects of andrographolide against cardiovascular disease, platelet activation, infertility, and NF- ? B activation. Therefore, this paper is intended to provide evidence reported in relevant literature on qualitative research to assist scientists in isolating and characterizing bioactive compounds. PMID:23634174

Jayakumar, Thanasekaran; Hsieh, Cheng-Ying; Lee, Jie-Jen; Sheu, Joen-Rong



FIB-SEM: an additional technique for investigating internal structure of pollen walls.  


Pollen grain morphology has been widely used in the classification of the Acanthaceae, where external pollen wall features have proved useful in determining relationships between taxa. Although detailed information has been accumulated using light microscopy, transmission electron microscopy and scanning electron microscopy (SEM) techniques, internal pollen wall features lack investigation and the techniques are cumbersome. A new technique involving precise cross sectioning or slicing of pollen grains at a selected position for examining wall ultrastructure, using a focused ion beam-scanning electron microscope (FIB-SEM), has been explored and promising results have been obtained. The FIB-SEM offers a good technique for reliable, high resolution, three-dimensional (3D) viewing of the internal structure of the pollen grain wall. PMID:23981267

House, Alisoun; Balkwill, Kevin



Chemical fingerprinting of Andrographis paniculata using HPLC, HPTLC and densitometry.  


An attempt has been made to develop a method by which to determine the chemical fingerprint of Andrographis paniculata (Acanthaceae). High-performance thin layer chromatography (HPTLC) was used to analyse hexane, chloroform, methanol and water extracts of leaves of A. paniculata. A computerised densitometer was applied to the two-dimensional spectrographic image analysis of the HPTLC plates. An HPLC equipped with a photodiode array detector was used for the analyses of these different extracts. The analyses showed that andrographolide and neoandrographolide are absent in the hexane extract but are present in greater amounts in the methanol extract as compared with the other extracts. These chromatograms may serve as a chemical fingerprint of the drug A. paniculata for quality control purposes and in the preparation of formulations based on the drug. PMID:15508831

Srivastava, Alpana; Misra, Himanshu; Verma, Ram K; Gupta, Madan M



The Families of Flowering Plants  

NSDL National Science Digital Library

Australian authors L. Watson and M. J. Dallwitz have updated this magnificent resource of detailed character descriptions, taxonomic information, references, and line illustrations of "all the Angiosperm families" from Acanthaceae to Zygophyllaceae. Users will find extensive data on plant and flower morphology, "seedling germination type, embryology, anther ontogeny, pollen cytology and morphology, stigma type, sieve-tube plastids, leaf, stem, nodal and wood anatomy, and phytochemistry (phenolics, alkaloids, cyanogenesis, etc.)." Watson and Dallwitz also include detailed taxonomic information on family synonyms, "numbers of species and genera in each family, and complete lists or (in the case of the largest families only) examples of the genera in each." A character list and an 'implicit attributes' section accompany the resource; information for downloading is available at the site. For teachers and graduate students alike, this online resource will be hard to beat.


Antimycobacterial activity of two natural alkaloids, vasicine acetate and 2-acetyl benzylamine, isolated from Indian shrub Adhatoda vasica Ness. leaves.  


In folk medicine, Adhatoda vasica Ness. (Acanthaceae) is used to treat asthma and cough. The leaves of A. vasica were powdered and extracted with hexane, ethyl acetate and methanol. The hexane extract showed 97 percent reduction in colony-forming units (CFU) at 100 microg/ml. The hexane extract was subjected to column chromatography. Two natural compounds, vasicine acetate and 2-acetyl benzylamine, were isolated from it. They were bioassayed against Mycobacterium tuberculosis. The two compounds showed strong antimycobacterial activity. Vasicine acetate and 2-acetyl benzylamine isolated from hexane extract of A. vasica leaves, significantly inhibited M. tuberculosis and one multi-drug-resistant (MDR) strain and one sensitive strain at 200 and 50 microg/ml, respectively. Our study demonstrated that both the compounds, vasicine acetate and 2-acetyl benzylamine, could be evaluated further for developing a drug to control M. tuberculosis. PMID:21289439

Ignacimuthu, S; Shanmugam, N



Enzyme inhibition, antioxidant and antibacterial potential of vasicine isolated from Adhatoda vasica Nees.  


Vasicine (1) was isolated from the ethanolic extract of Adhatoda vasica Nees (Acanthaceae) and the structure was confirmed using spectroscopic techniques. Acetylcholine esterase, trypsin, DPPH inhibition potential and FRAP assay were carried out using in vitro models. The results showed 38.4 ± 1.2% and 37.4 ± 1.1% activity in acetylcholine and trypsin inhibition assays respectively. The compound (1) exhibited significant DPPH inhibition activity (70.4 ± 1.3%, IC(50) = 212.3 ± 1.9 ?M). A dose dependant behavior of vasicine (1), was indicated in the FRAP assay. Antibacterial activity was checked according to agar well diffusion assay and results revealed that vasicine (1) showed moderate activity. PMID:22713956

Shahwar, Durre; Raza, Muhammad Asam; Tariq, Sidra; Riasat, Madiha; Ajaib, Mohammad



In vitro and in vivo aldose reductase inhibitory activity of standardized extracts and the major constituent of Andrographis paniculata.  


Aldose reductase is the first enzyme in the polyol pathway and catalyzes the reduction of glucose to sorbitol by coupling with the oxidation of NADPH to NADP(+) . This sorbitol accumulation leads to various diabetic complications, including neuropathy, nephropathy, cataracts, and retinopathy. In the present study, aldose reductase inhibitory (ARI) activity of the methanolic as well as standardized extracts of Andrographis paniculata (Burm. f.) Wall. ex Nees (Acanthaceae) and its chief constituent, andrographolide, were studied using in vitro and in vivo methods. In the in vitro method, rat lens as well as kidney homogenates were used for the preparation of enzyme, whereas the effect of these test samples on the galactitol level in the eye lens was studied in a galactosemic rat model in vivo. The results of the study revealed that both extracts of the plant and its major compound, andrographolide, possess ARI activity in vitro. They were also found to significantly decrease galactitol accumulation in vivo. PMID:22628202

Veeresham, Ciddi; Swetha, Ettireddy; Rao, Ajmeera Rama; Asres, Kaleab



Systematic analysis of in vitro photo-cytotoxic activity in extracts from terrestrial plants in Peninsula Malaysia for photodynamic therapy.  


One hundred and fifty-five extracts from 93 terrestrial species of plants in Peninsula Malaysia were screened for in vitro photo-cytotoxic activity by means of a cell viability test using a human leukaemia cell-line HL60. These plants which can be classified into 43 plant families are diverse in their type of vegetation and their natural habitat in the wild, and may therefore harbour equally diverse metabolites with potential pharmaceutical properties. Of these, 29 plants, namely three from each of the Clusiaceae, Leguminosae, Rutaceae and Verbenaceae families, two from the Piperaceae family and the remaining 15 are from Acanthaceae, Apocynaceae, Bignoniaceae, Celastraceae, Chrysobalanaceae, Irvingiaceae, Lauraceae, Lythraceae, Malvaceae, Meliaceae, Moraceae, Myristicaceae, Myrsinaceae, Olacaceae and Sapindaceae. Hibiscus cannabinus (Malvaceae), Ficus deltoidea (Moraceae), Maranthes corymbosa (Chrysobalanaceae), Micromelum sp., Micromelum minutum and Citrus hystrix (Rutaceae), Cryptocarya griffithiana (Lauraceae), Litchi chinensis (Sapindaceae), Scorodocarpus bornensis (Olacaceae), Kokoona reflexa (Celastraceae), Irvingia malayana (Irvingiaceae), Knema curtisii (Myristicaceae), Dysoxylum sericeum (Meliaceae), Garcinia atroviridis, Garcinia mangostana and Calophyllum inophyllum (Clusiaceae), Ervatamia hirta (Apocynaceae), Cassia alata, Entada phaseoloides and Leucaena leucocephala (Leguminosae), Oroxylum indicum (Bignoniaceae), Peronema canescens,Vitex pubescens and Premna odorata (Verbenaceae), Piper mucronatum and Piper sp. (Piperaceae), Ardisia crenata (Myrsinaceae), Lawsonia inermis (Lythraceae), Strobilanthes sp. (Acanthaceae) were able to reduce the in vitro cell viability by more than 50% when exposed to 9.6J/cm(2) of a broad spectrum light when tested at a concentration of 20 microg/mL. Six of these active extracts were further fractionated and bio-assayed to yield four photosensitisers, all of which are based on the pheophorbide-a and -b core structures. Our results suggest that the main photosensitisers from terrestrial plants are likely based on the cyclic tetrapyrrole structure and photosensitisers with other structures, if present, are present in minor amounts or are not as active as those with the cyclic tetrapyrrole structure. PMID:19647445

Ong, Cheng Yi; Ling, Sui Kiong; Ali, Rasadah Mat; Chee, Chin Fei; Samah, Zainon Abu; Ho, Anthony Siong Hock; Teo, Soo Hwang; Lee, Hong Boon



Antirrhinum and Asteridae--evolutionary changes of floral symmetry.  


Lamiales s.l., a prominent clade in the Asteridae, commonly have pentamerous monosymmetric flowers with the upper (odd) stamen reduced or lacking. Of the five largest families of the Lamiales s.l. (Gesneriaceae, Scrophulariaceae, Bignoniaceae, Acanthaceae, and Verbenaceae/Lamiaceae), perhaps the most phylogenetically basal, the Gesneriaceae, is the only one with odd staminodes or stamens occurring in all genera. In addition, Gesneriaceae have relatively large odd staminodes often with a differentiation in filament and reduced anther. They also have the largest proportion of genera (approx. 8%) with more or less polysymmetric flowers with five fertile stamens. In the more advanced families of the Lamiales s.l. the pattern varies. In Bignoniaceae an odd staminode is also commonly present. The traditional Scrophulariaceae is the most diverse family with some tribes constantly having an odd staminode (e.g. Antirrhineae) and others missing it (e.g. Manuleae, Pedicularieae), reflecting its probable polyphyly. In Acanthaceae, and still more in Verbenaceae/Lamiaceae with their extremely monosymmetric flowers an odd staminode is more often missing than present. From the systematic distribution of the different floral forms it is most likely that monosymmetric flowers were already present at the base of the Lamiales s.l. but 'reversal' to polysymmetry was still easy in the basal groups with only weak expression of monosymmetry. The evolution of more pronounced monosymmetry proceeded in different lineages and loss of the odd stamen occurred in various clades. The developmentally most intriguing groups are those with loss of the perianth and reduction of floral organ numbers to two or one, Callitriche being the most extreme genus. PMID:10645436

Endress, P K



Determinazione degli idrocarburi policiclici aromatici nelle ceneri di una centrale a carbone. (Polycyclic aromatic hydrocarbons in coal power plant fly ash).  

National Technical Information Service (NTIS)

In the determination of polycyclic aromatic hydrocarbons (PAH) present in ash samples of the thermoelectric power plant of Vado Ligure, the samples were: bottom ash, fly ash collected from the electrostatic precipitators (EP), and fly ash collected isokin...

A. M. Caricchia A. Delle Site C. Di Palo




Microsoft Academic Search

Objective: To describe an epidemic nosocomial outbreak of keratoconjunctivitis affecting at least 43 people in a Neonatal Intensive Care Unit in Madrid, between May and October 2002, perform epide- miologic research and determine preventive measu- res to prevent new outbreaks. Methods: Description of the outbreak, clinical case definition, microbiologic and epidemiologic research through the use of questionnaires. Analysis of the



Perspectivas sobre las escuelas charter: Una resena para padres de familia (Perspectives on Charter Schools: A Review for Parents). ERIC Digest.  

ERIC Educational Resources Information Center

Recently, charter schools have gained popularity with parents, students, and others as alternatives to public schools, but what are charter schools and what effects are they having? This Spanish-language Digest defines charter schools and clarifies some of the administrative and legal details surrounding such schools. The Digest also lays out some…

Donahoo, Saran



Microsoft Academic Search

La crisis económica y financiera internacional ha tenido diversos efectos sobre América Latina. Podemos suponer dos grandes escenarios: uno sombrío, poco alentador y carente de un futuro optimista y por otro, la traza de ciertas posibilidades o alternativas de vida, éstas últimas, a mi juicio, sólo partirán de las y los interesados, o sea, aquellas personas afectadas directa o indirectamente

Ángel Christian Luna Alfaro



Potencial de reciclaje de los residuos de una institución de educación superior: el caso de la Universidad Autónoma de Baja California  

Microsoft Academic Search

Solid waste characterization is the first step that must be taken within the planning of an integrated waste management program. This paper reports the results of a characterization study of the waste from Campus Mexicali I of the Universidad Autónoma de Baja California (UABC), Mexico. The objective of this research was to quantify the reduction and recycling potential of the

Armijo de Vega



Preferencias sociales en la asignación de recursos a desplazados y ex combatientes - Una aproximación al caso colombiano desde la Economía Experimenta  

Microsoft Academic Search

This paper studies the social preferences of individuals in the allocation and distribution of resources among displaced populations and former combatants of outlaw groups in Colombia. Several tests are undertaken with the theoretical apparatus of Experimental Economics. The behavior of different individuals is examined on the basis of the new behavioral hypotheses of economic theory. The research shows the existence

Stybaliz Castellanos Giovanini



Summer Reading Adventure! Tips for Parents of Young Readers = La lectura...Una aventura para el verano: Ideas para padres de ninos que apenas comienzan a leer.  

ERIC Educational Resources Information Center

Over the summer, many children lose ground in the reading skills they are building at school. Weave reading into the family's summer, and children will go back to school refreshed, excited, and ready to pick up where he or she left off. Advice for parents and caregivers includes: seek out books and reading materials that tie into children's summer…

Moss, Jeanette


Cuando se Tiene una Biopsia del Seno: Guia para las Mujeres y Sus Familias (Having a Breast Biopsy: A Guide for Women and Their Families).  

National Technical Information Service (NTIS)

This guide can help you talk with your doctor or nurse about breast biopsies. If you have a breast lump or a suspicious area on your mammogram, a breast biopsy tells if it is cancer. This guide talks about the different kinds of biopsies. It will tell you...



Validación de un algoritmo para el cálculo del riesgo absoluto de fracturas no vertebrales por fragilidad en una cohorte de mujeres posmenopáusicas  

Microsoft Academic Search

Background and ObjectivesAbsolute risk estimate for fractures in the individual subject provides meaningful information for interventions. Recently, we have described an algorithm to calculate the absolute risk for non-vertebral fractures in women from Spain, aged 65 years or older, that includes clinical parameters and quantitative bone ultrasound values of the calcaneus (URL: We assessed the performance of the algorithm

Joan Vila; Fernando Marín; Jesús González-Macías; Dionisio Martín; Sandra Tojeiro; Adolfo Díez-Pérez




Microsoft Academic Search

The model described in this article, pretends to measure, analyzer, evaluate and propose an improvement in industrial processes. Therefore this work is part of an empiric work of research which has taken place in the textile sector. The model shows in an empiric way the relationship between the internal functions of the production area in the company and its own




Logo and Von Neumann Ideas [and] Towards a Humanistic Use of Computers in Education = Hacia una insercion humanista de las computadoras en la educacion.  

ERIC Educational Resources Information Center

The first article, "LOGO and von Neumann Ideas," deals with the creation of new procedures based on procedures defined and stored in memory as LOGO lists of lists. This representation, which enables LOGO procedures to construct, modify, and run other LOGO procedures, is compared with basic computer concepts first formulated by John von Neumann.…

Reggini, Horacio C.


Desarrollo de una Interfaz de Control para un Observatorio Astronómico Robotizado con fines educativos en la Facultad de Ciencias Exactas; Físicas y Naturales de la UNSJ  

NASA Astrophysics Data System (ADS)

We report the development and the construction of an Interface to Control a robotized Astronomical Observatory (ICOA), which allows to control the operation of an observatory based on a Meade LX200 telescope. The interface operates together with a computer to control and supervise all the local variables of the observatory, and can take the control of it in risky situations. It serves as a link among the control computer and all the necessary devices for the astronomical observation such as the telescope, the dome, the weather station, the CCD camera, the calibration devices and the security devices. The computer receives orders from an operator who can be or not at the site of observation. The goal of this robotized observatory is the operation in a secure, autonomous and unattended way, with the purpose of to be used remotely by the students of the "Facultad de Ciencias Exactas, Físicas y Naturales" of the UNSJ. FULL TEXT IN SPANISH

Pogrebinsky, L.; Francile, C.


Estudio sociolinguistico de una variante sintactica el fenomeno "dequeismo" en el espanol canario (Sociolinguistic Study of a Syntactic Variant: The "Dequeismo" Phenomenon in Canary Islands Spanish).  

ERIC Educational Resources Information Center

The dequeismo phenomenon is occurring more frequently in spoken Spanish in both Spain and in Latin America. Introduction of the preposition "de" before "que" in nominal complements exploits one recourse in Spanish, namely the deictic capacity of prepositional "de" as a marker or introducer of the speaker's expressions, opinions, or thoughts. This…

Serrano, Maria Jose



Gli effetti delle agevolazioni finanziarie sulle decisioni di investimento e sulle performance delle imprese: una valutazione empirica della legge 488\\/92  

Microsoft Academic Search

La tematica delle agevolazioni finanziarie a favore delle imprese costituisce, da sempre, oggetto di notevole attenzione ed interesse da parte di studiosi, economisti e policy maker. La domanda di ricerca deriva da esigenze di policy - allo scopo di migliorare l’efficienza e l’efficacia delle norme di incentivazione - oltre che dalla richiesta di analisi empiriche per dare risposta a quesiti

Emilio Cardosi



Factores predictores de inicio y cesaci?n de tabaquismo en una cohorte de mujeres chilenas con 5,5 a?os de seguimiento  

PubMed Central

Background Chilean women have one of the highest smoking prevalence in the world. Aim To estimate the main factors associated with smoking initiation and quitting among a cohort of adult women living in a low socioeconomic status area of Santiago, Chile. Material and methods A random population-based sample of 1,100 women, 18 years and older, were selected from a community located in the South East area of Santiago. Sociodemographic, as well as smoking, beliefs, behaviors, stages of change and nicotine addiction level were recorded during a personal interview. After an average follow-up period of 5.5 years, women were re-evaluated. Results Seventy-three percent of women completed the study. At baseline, 39% of women were smokers. At the end of the study, there was an absolute smoking rate reduction of 7.1% (p<0.001). The main variables associated with smoking initiation were younger age (Odds ratio (OR): 1.08, 95% confidence intervals (CI): 1.05–1.12), higher education level (OR: 1.2, 95% CI: 1.07–1.35), and having fewer children (OR: 1.3 95% CI: 1.01–1.66). Factors related with quitting were younger age of onset (OR: 1.06 95% CI: 1.02–1.1), higher level of nicotine dependence (OR: 4.22, 95% CI: 1.74–10.27), and higher perception of smoking addiction (OR: 4.34, 95% CI: 2–9.09). Stage of change was associated with smoking cessation but its effect was diluted after adjusting for the level of nicotine addiction. Conclusions Sociodemographic and family factors were the main variables related with initiation, whereas age of onset, belief of addiction, and nicotine dependence were the main factors related with cessation. Women with a high motivation for quitting should be evaluated for nicotine addiction level to define the best strategy for intervention (Rev Méd Chile 2009; 137: 1001–9).

Puschel, Klaus; Thompson, Beti; Olcay, Fabiola; Frreccio, Catterina



Brachiterapia nel carcinoma prostatico (CaP): l'utilizzo del QuickLink®nella tecnica real-time. Presentazione di una nuova tecnica  

Microsoft Academic Search

Brachytherapy in prostate cancer: the use of QuickLink® system within the real-time technique. A new technique is presented ABSTRACT: INTRODUCTION. Brachytherapy with real-time technique allows the ultrasound transper- ineal implant of needles and the release of I125 seeds in the prostate, with intraoperative dosimetry carried out by a special software. After performing this seed-releasing technique on 160 patients, we present



Una nueva especie de Euglena (Euglenozoa: Euglenales) aislada de ambientes extremófilos en las Pailas de Barro del Volcán Rincón de la Vieja, Costa Rica  

Microsoft Academic Search

A new species of euglena isolated from a hot and acid mud pool located in Las Pailas de Barro, Volcán Rincón de la Vieja, Costa Rica is described. This species inhabits hot and acid environments. Euglena pailasen- sis sp. nov. main features are: the absence of flagella, the presence filaments like \\

Ana Sittenfeld; Maribelle Vargas; Ethel Sánchez; Marielos Mora; Aurelio Serrano


Aplicaciones de la radiofrecuencia en el tratamiento del dolor crónico benigno. Una revisión de las publicaciones de los últimos 6 años  

Microsoft Academic Search

R a d i o f requency started to be used in the clinical practice at the beginning of the fifties. However, in the past years and after the development of new equipment and material, side effects have been reduced and hence its use has be- c ome more common. Material and methods: We conducted a bibliographic search using as

M. A. López-Rodríguez; M. A. Camba


La Importancia de la Comunidad Hispana en el Conjunto Cultural de Nueva Orleans: Una Futuro Profesional Examina su Cultura y Lenguaje  

Microsoft Academic Search

Esta investigación examina la importancia de la comunidad hispánica en Nueva Orleans con énfasis en su lengua y cultura. La investigación es probar cómo es importa tener hispánicos en Nueva Orleans y cómo es beneficio poder comunicar con ellos en español. La investigación incluye la influencia de hispánicos en Nueva Orleans en el pasado, el presente y el futuro, información

Amber Kelly



Una alternativa de reparto para la provisión de los servicios municipales mínimos y comunes: la participación incondicional municipal en los ingresos del gobierno superior  

Microsoft Academic Search

El trabajo presenta un modelo alternativo de reparto entre los municipios de un fondo público (financiado por la Generalitat Valenciana cumpliendo con el artículo 142 de la Constitución Española), de tal manera que las necesidades de todos ellos queden cubiertas por igual en términos relativos. Se defiende que el sistema de reparto, comparado con los propuestos por otros autores o

José Salvador Miñana Simó



Un gobierno alternativo en una región olvidada de Colombia: entrevista al taita Floro Alberto Tunubalái Paja, gobernador del departamento del Cauca  

Microsoft Academic Search

El Departamento del Cauca está situado al Sur de Colombia. En los últimos años ha ocupado el penúltimo lugar en su aporte económico al país. Lós índices de pobreza son grandes, la oferta de trabajo es baja y la desatención y disminución del Estado se acentúa, haciendo cada vez más dificil la solución de las desigualdades sociales que vive la

Diego Jaramillo Salgado



El trabajo político e ideológico en la universidad cubana de hoy. El socialismo en las nuevas condiciones del siglo XXI: una opción viable  

Microsoft Academic Search

Un objetivo de primer orden en todos los años de Revolución ha sido lograr en los graduados universitarios la formación integral de un profesional revolucionario. Los cambios operados en la situación internacional después del derrumbe del campo socialista y la desaparición de la URSS así como el incremento de la agresividad económica e ideológica del gobierno de Estados Unidos y

Anay Pulgarón Ramos



Diseño de una red para proveer servicios de voz y d atos en la ciudad de Guayaquil usando el acceso inalámbrico del estándar WiMAX  

Microsoft Academic Search

With the gradual globalization of the processes, th e technology deployment in recent years, the explosive growth of Internet and the increasing com petition among operators, the XXI century telecommunications has entered a period of technolo gical and market revolution, where the main concern that chart the destiny of the sector will be the convergence based on the IP protocol.

Carlos Eduardo; Escobar Muentes; Gustavo Galindo; Juan Carlos Avilés


Valoración De La Multifuncionalidad Agraria: Una Aplicación A Través Del Método De Los Experimentos De Elección\\/Agricultural Multifunctionality Valuation: A Case Study Using The Choice Experiment  

Microsoft Academic Search

La multifuncionalidad agraria es el reconocimiento del ejercicio conjunto por parte de este sector de funciones económicas, ambientales y sociales. Sin embargo, no todas estas aportaciones al conjunto de sociedad son valoradas en los mercados, sino que buena parte de ellas son bienes públicos. Por este motivo, para que este concepto de multifuncionalidad pueda utilizarse operativamente en el diseño de




La crianza practica de los hijos: una guia paso a paso para formar hijos responsables y hogares felices (Common Sense Parenting: A Practical Approach from Boys Town).  

ERIC Educational Resources Information Center

This workbook is designed to help parents develop a "common sense" approach to child rearing and become more effective parents. Each of the 15 chapters suggests a parenting skill and gives examples for using the skill in a variety of situations. Each chapter also includes exercises designed to help parents put these skills into practice with their…

Burke, Ray; Herron, Ron


El análisis de un estudio clínico indica que una combinación de fármacos puede ser de gran eficacia contra el cáncer de ovario recidivante

El uso de un tratamiento farmacológico combinado para el cáncer de ovario recidivante mostró mejorías significativas, según se informó el día de hoy en el congreso anual de la Sociedad Americana de Oncología Clínica (ASCO). La combinación farmacológica se evaluó en un estudio de fase I y posteriormente en un estudio clínico aleatorizado de fase II patrocinado por el Instituto Nacional del Cáncer (NCI).


Prevalencia de demencia en una población urbana de Lima-Perú: estudio puerta a puerta Dementia prevalence in a Lima, Peru urban community: door-to-door study  

Microsoft Academic Search

Objective: To determine the prevalence and types of dementia in a Lima's urban community. Design: Bietapic conglomerate sampling. Setting: Private health institutions. Patients: Older than 65 years subjects. Interventions: In the Cercado de Lima district, 1 532 older than 65 years subjects randomly selected had brief neuropsychological evaluations including the Mini Mental State Examination (MMSE), drawing the Clock Test (PDR),

Nilton Custodio; Alberto García; Rosa Montesinos; Juan Escobar; Liliana Bendezú


Estudio de los Esquemas Conceptuales y de los Perfiles de Unos Alumnos de Segundo de Bup en Relacion con el Concepto de Pendiente de Una Recta.  

ERIC Educational Resources Information Center

Presents a study to determine students' concept of slope carried out in three classes of the second form before introducing the notion of derivative. Discusses the meaning of conceptual framework and reviews literature on slope. Analyzes student responses to a questionnaire for mathematical content and expression and interprets the results. (MDH)

Gimenez, Carmen Azcarate



Análisis de crecimiento estacional de una pradera asociada alfalfa-pasto ovillo Seasonal growth analysis of alfalfa-orchard grass swards  

Microsoft Academic Search

The aim of the present study was to determine a seasonal growth curve in order to define the optimum harvesting time of an alfalfa - orchard grass sward during the different seasons of the year. To this end, a seasonal growth analysis was carried out. Twenty four (24) plots (3 x 3 m) were allocated in a completely randomized design

Alfonso Hernández-Garay; Jorge Pérez Pérez; José G. Herrera


Steppin' On Up: A Post-Secondary Guide for Migrant Students = Tomando Accion: Una Guia para los Estudiantes Migrantes Sobre Que Hacer Despues de la Escuela Secundaria.  

ERIC Educational Resources Information Center

This bilingual guide (English and Spanish) provides information for migrant students on postsecondary education. The guide includes information on: (1) career planning, involving self-exploration, occupational exploration, and strategies for reaching career objectives; (2) planning for postsecondary education during high school, including a…

Western Stream Migrant Education Program Coordination Center, Portland, OR.


Optimización de una formulación de queques (cakes) con características funcionales a partir de almidones resistentes, Sphagnum magellanicum y harina desgrasada de avellana (Gevuina avellana Mol)  

Microsoft Academic Search

SUMMARY. Optimization of a cake formulation with functional characteristics using resistant starch, Sphagnum magellanicum moss and deffated hazel nut flour (Gevuina avellana, Mol). Resistant starch (RS) Hi Maize 260, Sphagnum magellanicum Moss (SM) both natural resources rich in total dietary fiber, and defatted hazel nut flour (DHN) as protein resource were used in the development of a pastry product (queque)

Mario Villarroel; Carla Reyes; Julia Hazbun; Julia Karmelic


Desarrollo de una formulación optimizada de galletas para celiacos utilizando harina desgrasada de avellana chilena (Gevuina avellana, Mol) y harina de quinoa (Chenopodium quinoa Willd)  

Microsoft Academic Search

SUMMARY. Development of a cookie formulation for celiac people using defatted Chilean hazel nut (Gevuina avellana. Mol) flour and quinoa (Chenopodium quinoa Willd) flour. The present investigation deals with the optimization of a cookie formulation based on deffated chilean hazel nut flour (DCHF) and quinoa flour (QF) characterized for being gluten free resources, aimed to increment the nutritional options of

Mario Villarroel; Carolina Huiriqueo; Julia Hazbun; Diego Carrillo


La Red Regional Replad: Una Estrategia Innovadora para la Capacitacion de Administradores Educacionales (The Regional Network Replad: An Innovative Strategy for the Training and Preparation of Educational Administrators).  

ERIC Educational Resources Information Center

This document presents an overview, analysis, and historical assessment of the Major Project for Education in Latin America and the Caribbean. Conferences, regional meetings, and outcomes from the inception of the project in 1979 are described. This project stresses the establishment of a regional network for exchange of information, experiences,…

Jimenez Espinoza, Jorge


IDEA: !"Vamos a Conocer Espana!: Una Guia Cultural Basada en Imagenes" (Let's Become Acquainted with Spain!: A Basic Cultural Guide in Pictures).  

ERIC Educational Resources Information Center

Presents a collection of pictures presenting a visual array of the geographic features, customs, art, dress, and traditions of the Spanish culture on the European continent that are intended for classroom use. (Author/CK)

Inestrillas, Mar



Consequences of antenna design in telemetry studies of small passerines [Consecuencias en el disen??o de una antena en un estudio de radiotelemetria para paserinos  

USGS Publications Warehouse

Entanglement and mortality of Palila (Loxioides bailleui), an endangered Hawaiian honeycreeper, occurred when birds were radio-tagged with transmitters equipped with a long, limp, solder-tipped antenna. Birds were found suspended in trees by their transmitter antenna on eight occasions. Although these birds eventually freed themselves or were freed by us, at least one bird died afterwards. For radio telemetry studies of small passerine species we recommend avoiding transmitters equipped with an antenna that is bulbous at the tip, >16 cm in length, limp, and shiny.

Dougill, S. J.; Johnson, L.; Banko, P. C.; Goltz, D. M.; Wiley, M. R.; Semones, J. D.



Una revisión crítica de la evidencia experimental del fenómeno de percepción extrasensorial: aciertos y errores de un paradigma de monotonización perceptiva  

Microsoft Academic Search

In this article, we review the experimental evidence for extrasensory perception (ESP). We focus on studies carried out at academic centers and universities which used a particular experimental design for sensory isolation and perceptual monotonisation, the Ganzfeld. First, we describe the methodology used in these studies. Secondly, we review the results achieved, and examine the arguments put forward by the

José Miguel; PÉREZ NAVARRO; Anthony R. LAWRENCE; Reino Unido


Proposta metodologica e principi generali per l'insegnamento di una L2 (Methodological Proposal and General Principles for Teaching a Second Language).  

ERIC Educational Resources Information Center

Summarizes the contents of four books on language teaching written by Harold Palmer between 1917 and 1924. Palmer's writings bridged some of the gap between theory and practice in language teaching. (CFM)

Chiuchiu, Angelo



Terrestrial and airborne laser scanner techniques applied to rock slope instability analysis: the case of Einser-Cima Una (Sexten Dolomites, Italy)  

NASA Astrophysics Data System (ADS)

A representative characterization of a rock instability phenomenon is a fundamental task in the understanding of its evolution and the forecasting of possible further slope failure. The first step towards a complete study of the unstable slope consists in its detailed geometrical, geomechanical and kinematical characterization in order to generate a high resolution 3D digital model of the investigated area, recognize the main discontinuity sets of the rock mass, evaluate displacements and deformations occurred between subsequent surveys. This kind of study can be carried out by means of remote sensing techniques like terrestrial (TLS) and airborne laser scanner (ALS), which allow detailed investigations of a rock cliff in remote and safe mode. In particular, TLS allows the acquisition of the sub-vertical cliffs, whereas ALS provides information over wide areas with higher performances in sub-planar surfaces. These remote sensing techniques has been applied to analyze the northern rock wall of Einser-Cima (Fischleintal-Val Fiscalina, Sexten Dolomites, Bozen, Italy), whose higher portion was involved by a large (45000 m3) rock collapse occurred on October 12th, 2007. Two TLS measurements sessions were carried out, in November 2007 and in October 2008 respectively, considering two suitable viewpoints placed at about 200 m distance from the main failure surface, providing a sampling step of 10 cm. The analysis of TLS data allowed a detailed reconstruction of the surface geometry as well as a description of orientation, persistence, spacing and aperture of the rock mass discontinuity sets and the characterization of orientation and roughness of the failure planes. Moreover, comparisons between the two TLS-based point clouds allowed the analysis of displacements and deformations, as well an accurate evaluation of the open joint apertures. ALS data of the whole region acquired by the Geological Service of Bozen Province in 2004-2005 was also available. These data, having a mean sampling step of about 40-50 cm, represents the conditions before the cited 2007 landslide. In this way, direct comparison between the ALS and TLS data provided a volume estimate of the fallen rock mass. Integration of ALS and TLS data allowed also the characterization of the main structural and geomechanical features, both at the slope scale and on wider area. Finally, the obtained values about joint apertures were validated by direct measures provided by extensometers installed in higher critical joints.

Squarzoni, C.; Teza, G.; Galgaro, A.; Carraro, C.; Bucceri, N.



Informe Anual a la Nación sobre el Estado del Cáncer 1975-2002 con una sección especial sobre las tendencias de tratamiento: preguntas y respuestas

Las organizaciones oncológicas principales de la nación informan que el riesgo de los estadounidenses de morir de cáncer sigue disminuyendo y que las tasas de casos nuevos de cáncer permanecen estables. El Informe Anual a la Nación sobre el Estado del Cáncer, de 1975 a 2002, señala que las tasas de mortalidad de cáncer que se observaron para todos los cánceres combinados disminuyeron 1,1 por ciento por año de 1993 a 2002.


A Special Family Series. Mario and Clara Hernandez. Clara Finds a Friend = Lina Familia Especial. Mario y Clara Hernandez. Clara Eucuentra una Amiga.  

ERIC Educational Resources Information Center

These two comic books are part of the "Very Special Family" series, created by and for Hispanic parents of children with special needs. The materials are designed to help parents deal with the emotional difficulties of raising a child with disabilities. The booklets are printed in both English and Spanish. In Part 1, "Mario and Clara Hernandez," a…

Cazares, Maria


Terrestrial and airborne laser scanner techniques applied to rock slope instability analysis: the case of Einser-Cima Una (Sexten Dolomites, Italy)  

Microsoft Academic Search

A representative characterization of a rock instability phenomenon is a fundamental task in the understanding of its evolution and the forecasting of possible further slope failure. The first step towards a complete study of the unstable slope consists in its detailed geometrical, geomechanical and kinematical characterization in order to generate a high resolution 3D digital model of the investigated area,

C. Squarzoni; G. Teza; A. Galgaro; C. Carraro; N. Bucceri



Elaborare in sardo, elaborare in italiano. Una ricerca nella scuola media (Uses of Sardinian and Italian: Research in the Junior High School).  

ERIC Educational Resources Information Center

Presents a historic overview and analysis of the Sardinian language (actually a system of dialects), and defines diglossia and bilingualism. A discussion focuses on research conducted in two junior high schools to determine the differences in linguistic behavior in two contrasting situations (village and city) in regard to Sardinian and Italian.…

Pinto, Maria Antonietta; Migaleddu, Maria Vittoria




Microsoft Academic Search

En este trabajo se analizan los factores más relevantes de la cultura organizacional que aparecen en las redes virtuales de fabricación global (RVFG). Estas organizaciones están formadas por empresas muy dinámicas que fabrican todo tipo de productos o servicios, las cuales establecen entre sí relaciones de tipo horizontal y vertical, pudiendo incluso ser competidores, donde no es necesario mantener internamente

J. R Vilana Arto; C. Rodríguez Monroy



La Problematica Tecnologica Latinoamericana y Sus Implicaciones en el Desarrollo de una Ingenieria Nacional (Latin America Technological Problem and Its Implications in the Development of National Engineering).  

National Technical Information Service (NTIS)

The report introduces four perspectives to follow up: (1) Strategical elements that hasten the technological development within the Latin American countries; (2) Technological Policy within Latin America; (3) Characterization of the development of the Lat...

G. Tirado E. Paredes M. Genova L. Alvaray J. Giordani



Arrecifes de Coral: Una Coleccion de Actividades en Espanol para Estudiantes de Escuela Intermedia (Coral Reefs: A Spanish Compilation of Activities for Middle School Students).  

ERIC Educational Resources Information Center

This activity book for middle school students on coral reefs is divided into 10 sections. Section 1 is the introduction. Section 2 describes what coral reefs are while section 3 describes how coral reefs reproduce and grow. Section 4 describes where coral reefs are found, and section 5 describes life on a coral reef. Section 6 describes the…

Walker, Sharon H.; Newton, R. Amanda; Ortiz, Alida


""Una Persona Derechita" (Staying Right in the Mind)": Perceptions of Spanish-Speaking Mexican American Older Adults in South Texas "Colonias"  

ERIC Educational Resources Information Center

Purpose: This study describes the perceptions of brain health among older Spanish-speaking Mexican Americans who reside in colonia areas of the Lower Rio Grande Valley of Texas. Design and Methods: In 2007, 33 Mexican American older adults (9 men and 24 women) were recruited by "promotoras" (community health workers) from clusters of "colonias" in…

Sharkey, Joseph R.; Sharf, Barbara F.; St. John, Julie A.



Enfermedad Celíaca en el adulto. Prevalencia en una población de riesgo. Estudio descriptivo y retrospectivo de pacientes del Hospital Alemán de Buenos Aires.(*)  

Microsoft Academic Search

Objective: Due to the fact that there is not enough data about the epidemiology of the celiac disease in Argentina and South America, specially amongst the adult population, the objective of this study is to estimate the prevalence of the celiac disease in the adult patient considering the oligosymptomatic population and the population of risk of the disease. Materials and

Sebastián Gimenez; Luis A. Boerr; Pablo Luna; Dra Adriana


Aspectos biológicos de una nueva población del Capuchino de Cabeza Negra (Lonchura malacca, Estrildidae) en el alto valle del Magdalena, Tolima  

Microsoft Academic Search

We report the establishment of a population of Lonchura malacca in the upper Magdalena valley in the municipalities of Ibague, Piedras and San Luis (Tolima). In this study we documented size of groups, distribution, habitat, behaviour, diet, reproductive activity and morphometric data. L. malacca frequents grasslands, agricultural fields, including rice paddies (Oryza sativa) and riverside forests in Tropical Dry Forest

Diego Carantón-Ayala; Carolina Díaz-Jaramillo; Ronald Mauricio Parra; Jeyson Sanabria-Mejía; Miguel Moreno-Palacios


Cuando su Hijo ha Desaparecido: Una Guia de Supervivencia para la Familia. Tercera Edicion (When Your Child Is Missing: A Family Survival Guide. Third Edition).  

National Technical Information Service (NTIS)

When your child is missing, your whole world seems to fall apart. You are bombarded by questions from friends, neighbors, the police, and the media and forced to make decisions that you never thought you would have to make. You feel desperate, confused, i...




Microsoft Academic Search

En la era de la innovación, la dotación de la infraestructura tecnológica necesaria y otras inversiones en I+D no son suficientes para configurar un ecosistema en el que la innovación sea todo un referente. El verdadero reto reside probablemente en promover y alcanzar un cambio cultural que potencie e interiorice capacidades, valores y relaciones facilitadoras de comportamientos proclives a la

Arturo Rodríguez Castellanos; Jon Hoyos Iruarrizaga; Julen Izaguirre Olaizola; M. Azucena Vicente Molina



Influencia de los cambios hormonales del ciclo menstrual en la percepción del dolor en las disfunciones temporomandibulares. Una revisión sistemática de la literatura médica  

Microsoft Academic Search

A large body of evidence suggests that temporomandibular joint disorders (TMJD) are much more prevalent in women than in men. The purpose of this systematic review was to examine whether hormone levels during the menstrual cycle influence TMJD when painful symptoms are present. A data extraction search strategy was performed in the Medline, Embase, Scielo and CINAHL databases from 1970

R. La Touche; J. Fernández-Carnero; J. Pesquera Velasco; J. Mesa




Microsoft Academic Search

Effect of NPK fertilization on yield of a commercial cocoa plantation at the Southeast of Táchira State, Venezuela The low cocoa yields in Venezuela are associated with lack of fertilization. Two experiments were performed in a commercial plantation in the Southeast of Táchira State to determine the plant response to several doses of fertilization. The treatments were established based on

Dercy Parra; Erbert Gamboa; José Rincón



Etica Comercial: Manual sobre la Administracion de una Empresa Comercial Responsable. (Business Ethics: A Manual for Managing a Responsible Business Enterprise in Emerging Market Economics.)  

National Technical Information Service (NTIS)

Published under the auspices of the Commerce Department's Good Governance Program, this book is a comprehensive manual on how to design and implement a business ethics program that is in accordance with modern standards of responsible business conduct. It...



Alianza para el Aprendizaje: Una guia de actividades educativas para familias (Alliance for Learning: A Guide of Educational Activities for Families).  

ERIC Educational Resources Information Center

This Spanish-language publication condenses the information in the Alliance for Learning series. The publication is intended principally for families with preschool or primary grade children, although the material can be used with older children. The sections of the publication address various themes and present activities that parents can do with…

Carr, Phil



Microsoft Academic Search

Recibido para revisar 26 de Enero de 2006, aceptado 26 de Septiembre de 2006, versión final 15 de Octubre de 2006 RESUMEN: En la Lingüística Computacional los corpus han sido uno de los recursos más utilizados para estudiar los diferentes fenómenos lingüísticos. La recopilación de corpus en los cuales se presenta interacción entre el humano y el computador presenta como




Impacto de un programa de lectura extensiva en la adquisicion de una segunda lengua (Impact of an Extensive Reading Program on Second Language Acquisition).  

ERIC Educational Resources Information Center

This study investigates the application of Krashen's Input Hypothesis, studying the relationship between exposure to the target language and language acquisition within the context of the English-as-a-foreign-language secondary classroom in Spain. The project studied the effect of additional reading instruction with emphasis on reading for…

Coll, Ana; And Others


Contribucion de la Fonetica y la Fonologia a la Ensenanza de una Segunda Lengua (Phonetic and Phonological Contributions to Teaching a Second Language)  

ERIC Educational Resources Information Center

The historical changes in the teaching methods of modern languages are discussed, with emphasis on the modern principle that language, before anything, is a means of oral communication. (Text is in Spanish.) (NCR)

Cardenas, M. Cristina



Una variante del metodo que utiliza la simulacion de un proceso de difusion para la caracterizacion de formas de figuras planas  

Microsoft Academic Search

This is a variation of a previously presented method (1) for characterizing the shapes of plane figures. In addition to retaining the advantages of the original method, this variant includes one more: it is no longer necessary to halt a (simulated) diffusion process during the transient stage; that is, before arriving at an equilibrium. On the contrary, the longer the

Osvaldo Skliar; V ´ õctor Medina


Hacia Una Pedagogia de Solucion de Problemas en La Educacion Ambiental. Serie Educacion Ambiental 15 (Pedagogy of Solutions and Problems in Environmental Education. Environmental Education Series 15.  

ERIC Educational Resources Information Center

This document discusses the teaching of problem solving in environmental education. From an interdisciplinary viewpoint, this study describes some strategies for teaching that can favor the practice of educational activities oriented toward solving the concrete problems of the surrounding environment. The volume is divided into seven chapters. The…

United Nations Educational, Scientific, and Cultural Organization, Santiago (Chile). Regional Office for Education in Latin America and the Caribbean.


Work and Family in the United States: A Policy Initiative. A Report of the Family Policy Panel of the Economic Policy Council of UNA-USA.  

ERIC Educational Resources Information Center

As part of its world employment project, the Economic Policy Council of the United Nations Association of the United States formed the family policy panel to further examine the extent of ongoing changes affecting the family, the workplace, and the economy. In its work, the family policy panel concentrated on five issues considered central to the…

United Nations Association of the United States of America, New York, NY.


Previniendo el Uso de Drogas entre Ninos y Adolescentes: Una Guia Basada en Investigaciones (Preventing Drug Use among Children and Adolescents: A Research-Based Guide).  

ERIC Educational Resources Information Center

This question and answer guide provides an overview of the research on the origins and pathways of drug abuse, the basic principles derived from effective drug abuse prevention research, and the application of research results to the prevention of drug use among young people. The basic principles derived from drug abuse prevention research are…

Sloboda, Zili; David, Susan L.


Convenzione sui cambiamenti climatici: ipotesi per una assegnazione di quote di emissioni di anidride carbonica. (Climate change convention: reallocation of carbon dioxide emissions).  

National Technical Information Service (NTIS)

In 1992, during the United Nation's Conference on Environment and Development, held in Rio de Janeiro, the Framework Convention on Climate Change was signed. The ultimate objective of this Convention is the control and the reduction of greenhouse gas rele...

P. Turchetti M. Venanzi



Descubrimiento y selección de herbicidas  

NSDL National Science Digital Library

Históricamente, los herbicidas se han descubierto por selección al azar de la actividad sobre malezas de interés, con colecciones de químicos.  Aunque totalmente empírico, este enfoque ha sido sorprendentemente exitoso y ha producido esencialmente todos los herbicidas comerciales que hoy se usan.  Más recientemente, las compañías de agroquímicos han adoptado estrategias direccionadas, usando ensayos  in vitro, relaciones  estructura del compuesto/actividad, y ensayos de perfilamiento de  mARNs, proteínas y metabolitos.  Estos últimos enfoques, en combinación  con filtros estrictos, están diseñados para explotar avances recientes en la tecnología y para tomar ventaja de nuestro mejor entendimiento de los sistemas biológicos.



Microsoft Academic Search

summARY This paper presents a case of intussusception in a 90 years old woman which is noteworthy because intussusceptions in adults, without a lead point are uncommon, intussuception with a lead point is even more uncommon. Most of the time radiologists define the diagnosis, although images are characteristic; it is important to exactly locate the lesion in the anatomy of

Hernando Lozano López; Juan Carlos Correa Puerta


Estudio teorico para determinar el coeficiente de transferencia de calor por medio de una correlacion empirica en conveccion forzada a una sola fase, para canales anulares. (Theoretical study to determine the heat transfer by forced convection coefficient in an empirical correlation in single phase, for annular channels.).  

National Technical Information Service (NTIS)

In the heat transfer studies by forced convection, we have few data about behavior of the fluids in an annular channel heated by a concentric pipe, such date is necessary to know the heat transfer coefficient that establish the interchange of energy and t...

E. Herrera



El Tzetz o Bledo (Amaranto): Una Planta Alimenticia de Origen Mesoamericano que Tiene Muchas Proteinas pero que se Esta Olvidando (Tzetz or Wild Amaranth (Amaranthus deulis): An Edible Mesoamerican Plant of High Protein but Forgotten).  

National Technical Information Service (NTIS)

The booklet discusses the use and history of the wild amaranth. Methods of cultivation and cooking recipes are given for the three types of wild amaranth. Suggestions for further research are also made.



Editorials Achieving a better knowledge on the causes and early course of psychoses: a profitable investment for the future? Editoriali Ottenere una maggiore conoscenza sulle cause e sulle fasi iniziali del decorso delle psicosi: un investimento fruttuoso per il futuro?  

Microsoft Academic Search

Three challenges, among the many ones that psychi- atric epidemiology must face in the future, have the poten- tial to contribute greatly to the improvement of the men- tal health of the population: a) to favour mental health promotion and primary and secondary prevention; b) to increase the capability of mental health services to treat mental disorders at their onset



Emotional resilience or increased vulnerability? A survey of the reactions of Holocaust survivors to the threat of terror in Israel Elasticità emotiva o aumentata vulnerabilità? Una ricerca sulle reazioni dei sopravvissuti all'Olocausto alla minaccia del terrore in Israele  

Microsoft Academic Search

Summary Objective Studies on Holocaust survivors in Israel in times of increased social tension have shown increases in adverse psychological reactions with increased social stress. The aim of this study was to assess the effect of increased tension during renewed hos- tilities in Israel in 2002 (\\



La Implementacion de la Tecnologia en el Salon de Clases: Una guia para los que toman decisiones en las escuelas rurales (Putting Technology into the Classroom: A Guide for Rural Decision Makers).  

ERIC Educational Resources Information Center

This guide is intended for superintendents and central office staff in small, rural school districts who are considering ways of using technology in the classroom. It provides information about why technology is worth the trouble and what it can accomplish, lays out the basic issues and tasks involved in integrating technology into classroom…

Boethel, Martha; Dimock, K. Victoria; Hatch, Lin; Adams, Sharon, Ed.; Heath, Marilyn, Ed.


The Latinas' Guide to the Information Superhighway: A Bilingual Guide for Latinas by Latinas = Guia para Mujeres Latinas sobre la Supercarretera de la Informacion: Una Guia Bilingue para Latinas por medio de Latinas.  

ERIC Educational Resources Information Center

This guide to the Internet is designed to give Latinas basic information on computers and the information superhighway. Written in both Spanish and English, the guide begins by defining the Internet and making some suggestions about acquiring access to a computer. Among the topics discussed are how to choose an Internet service provider, how to…

MANA, A National Latina Organization, Washington, DC.


I processi cumulativi nella crisi del debito degli anni 80: una lettura dai casi di Argentina, Brasile e Messico Cumulative processes in the 1980s debt crisis: an analysis from Argentina, Brazil and Mexico's case studies  

Microsoft Academic Search

This paper analyses the 1980s Latin American debt crisis in Argentina, Brazil and Mexico and, in particular, the influence of cumulative processes at work in its early and final stages. The paper is organised in three sections. The first examines the crisis<92> features in the three countries, and maps the key macroeconomic and behavioural relationships at its onset and resolution.

Andrea de Panizza



Introduzione di metodologie e strumenti per il lavoro cooperativo e di gruppo in una azienda complessa. Valutazione dell'impatto tecnologico ed organizzativo. (Computer supported cooperative work. Technological and organizational impact).  

National Technical Information Service (NTIS)

The concept of work meant as a set of coordinated activities according to the latest organization theories optimizes the enterprise's information and knowledge sharing, the only durable resources of a modern organization. The information technologies and ...

S. Fuligni R. A. Di Marco F. Minelle



Workshop. La reologia del sangue: una scienza multidisciplinare. Istituto Superiore di Sanita. Roma, 8 Novembre 2002 (Workshop. The Rheology of Blood: A Multidisciplinal Science. Istituto Superiore di Sanita. Rome, November 8, 2002).  

National Technical Information Service (NTIS)

In the last years, the rheology of blood or haemorheology has had an increasing development in various areas of biology and medicine. This Workshop, organized by the Istituto Superiore di Sanita (the Italian National Institute of Health) and the Societa I...

P. Caprari M. C. Martorana



Simulacion hidraulica de los sistemas de una central nuclear para el calculo de cargas en canerias. (Hydraulic simulation of the systems of a nuclear power plant for charges calculation in piping).  

National Technical Information Service (NTIS)

This work presents a general description of the methodology used by the ENACE S.A. Fluids Working Group for hydraulics simulation of a nuclear power plant system for the calculation charges in piping. (Author). (Atomindex citation 23:054231)

N. Masriera



Methodology for producing 100 tons of fuel peat for a cement plant test burn. Metodologia para producir 100 toneladas de turba combustible para una prueba de quema en uns planta de cemento  

SciTech Connect

As a part of the Agency for International Development-funded cooperative project between Los Alamos and Costa Rica, the burning characteristics of Costa Rican peat were to be tested in an application. The cement plant owned by Industria National de Cemento in Cartago has a capability to handle solid fuel and was chosen for the burn demonstration. The Jungle No. 1 Peat Deposit near El Cairo was chosen as the site of the peat excavation. This peat production methodology study covers project site selection, installation of an access road and clearing of the jungle vegetation, removal of an upper layer of organic peat, excavation of fuel-grade peat, transport of the peat to the drying site, and drying and stockpiling of the finished product. As of this date the peat removal for the demonstration project has been started, and a description of the operation is included as an appendix to this paper. 10 figs.

Allen, A.B.; Malavassi, L.; Ramirez, O.; Thayer, G. (Allen (Andrew), Plymouth, NC (USA); RECOPE, San Jose (Costa Rica); Los Alamos National Lab., NM (USA))




Microsoft Academic Search

th , 8 th and 9 th graders at six public high schools in diverse urban and rural settings in Costa Rica. CyberL@b uses interactive media resources designed to engage student in learning English within authentic contexts. Cyberlab was designed to create an environment that is unique in fostering the integration of the four language skills (listening, speaking, reading, and

Allen Quesada Pacheco



Conversado con su Medico: Consejos para Lograr una Buena Comunicacion Entre las Personas de la Tercera Edad y su Doctor (Talking With Your Doctor: A Guide for Older People).  

National Technical Information Service (NTIS)

How well you and your doctor talk to each other is one of the most important parts of getting good health care. A good patient-doctor relationship is a partnership. You and your doctor can work as a team, along with nurses, physician assistants, pharmacis...



Guiandose por la Intrincada Senda de la Educacion Especial: Una Guia para Padres y Maestros. Tercera Edicion. (Negotiating the Special Education Maze: A Guide for Parents & Teachers. Third Edition).  

ERIC Educational Resources Information Center

Designed to assist Spanish-speaking parents and teachers in understanding special education procedures, this book describes the process for obtaining school services for children with disabilities. An introduction reviews six major provisions of the Individuals with Disabilities Education Act (IDEA) that relate to children's rights to a free,…

Anderson, Winifred; Chitwood, Stephen; Hayden, Deidre



Microsoft Academic Search

Many breast cancer survivors suffer from menopausal symptoms and in young women they are induced and worsened by adjuvant chemio-hormonal therapies. HRT is controindicated in women prevoiusly treated for breast cancer and it's necessary to find alternative options. vasomotor symptoms are the most frequent complaints. Phytoestrogens, Cimicifuga Racemosa and vitamine E have been shown to be as effective as placebo.

Nicoletta Biglia; Franziska Kubatzki; Davide Marenco; Paola Sgandurra; Elisa Peano; Piero Sismondi


Solucion analitica al blindaje de locales de teleterapia con Co 60 segun una ecuacion semiempirica de atenuacion de fotones. (An analytical solution to the shielding of Co 60 teletherapy rooms based on a semiempirical equation of photon attenuation).  

National Technical Information Service (NTIS)

A semiempirical equation of polynomial-exponential type is presented to describe the transmission data of Co-60 gamma radiation in finite materials of concrete and lead. This equation and the expression obtained for the relationship of scatter-to-incident...

D. G. Saez L. Hernandez M. Borroto M. Figueredo



Gripe A pandémica en una unidad de cuidados intensivos: experiencia en España y Latinoamérica (Grupo Español de Trabajo de Gripe A Grave\\/Sociedad Española de Medicina Intensiva, Crítica y Unidades Coronarias)  

Microsoft Academic Search

IntroductionPandemic Influenza A (H1N1)v infection is the first pandemic in which intensive care units (ICU) play a fundamental role. It has spread very rapidly since the first cases were diagnosed in Mexico with the subsequent spread of the virus throughout the Southern Cone and Europe during the summer season.

A. Rodríguez; L. Socías; J. E. Guerrero; J. C. Figueira; N. González; E. Maraví-Poma; L. Lorente; M. Martín; A. Albaya-Moreno; A. Algora-Weber; J. Vallés; C. León-Gil; T. Lisboa; C. Balasini; M. Villabón; R. Pérez-Padilla; D. Barahona; J. Rello



Viajando por la Carretera de la Educacion Especial: Una Guia para los Padres para Tener un Viaje Feliz y Seguro (Traveling the Special Education Highway: A Parent's Guide to a Safe and Happy Journey).  

ERIC Educational Resources Information Center

Designed for Spanish-speaking parents, this brochure, written in Spanish, uses a car-trip analogy to describe special education services for students with disabilities. It addresses: (1) child find; (2) initial evaluation and eligibility determination; (3) categories of students who receive special education services and related services; (4)…

Santa Maria, Karen


Linguistica matematica, statistica linguistica e linguistica applicata. Una nota storica sui lessici di frequenza e l'educazione linguistica (Mathematical Linguistics, Linguistic Statistics, and Applied Linguistics. An Historical Note on Word Frequencies and Linguistic Education)  

ERIC Educational Resources Information Center

This article traces the history of several themes in applied linguistics and to show the relationships between linguistic theory and the sciences concerned with the learning and teaching of languages. Interest in word frequency statistics is discussed in particular. (Text is in Italian.) (CFM)

Elia, Annibale



Influencia de los polimorfismos de CYP2C19 en la reactividad plaquetaria y el pronóstico en una población no seleccionada de pacientes con síndrome coronario agudo sin elevación del ST  

Microsoft Academic Search

Introduction and objectivesCYP2C19*2 and CYP2C19*17 alleles appear to contribute to heterogeneous clopidogrel metabolism. Aims: (1) to assess the phenotype-genotype relationship of CYP2C19*2 and *17 allele carriage and (2) to explore the clinical impact of those polymorphisms at 6-month follow-up of an acute event in an unselected population of non-ST elevation acute coronary syndrome.

Antonio Tello-Montoliu; Eva Jover; Francisco Marín; Agustina Bernal; Maria L. Lozano; Beatriz Sánchez-Vega; Francisco J. Pastor; José A. Hurtado; Mariano Valdés; Vicente Vicente; José Rivera


"Una Communita" Poco Nota della Communicazione non Verbale: Come Communicano il Direttore e l'Orchestra (A Little Known "Community" of Nonverbal Communication: How the Conductor and Orchestra Communicate).  

ERIC Educational Resources Information Center

Examines how conductors and orchestras communicate. Communication is essentially nonverbal. Conductors use gestures, gaze, facial expression, nods and posture to deliver their message. Norbert Weiner's Cybernetic Theory of human communication is seen as a means of analyzing precisely how this musical communication takes place. (16 references) (LET)

Leonardi, Magda Farago



Una nueva especie de Pachynolophus (Mammalia, Perissodactyla) de Zambrana (Álava, Región Vasco-Cantábrica). Análisis filogenético de Pachynolophus y primera cita en el Eoceno superior de la Península Ibérica  

Microsoft Academic Search

Recent fieldwork in the Late Eocene of Zambrana (Álava, Basque-Cantabrian Region) has yielded a new species of Pachynolophus: P. zambranensis nov. sp. According to the phylogenetic analysis made in this study, the Zambrana species is part of the monophyletic Pachynolophus, which is defined at least by three synapomorphies: significant progressive increase of the size in the M1\\/1-M3\\/3 series, being M3\\/3

Ainara Badiola; Xabier Pereda-Suberbiola; Miguel Angel Cuesta



Bilinguismo e immigrazione: una nota sociolinguistica al piano europeo di mantenimento delle lingue nazionali nelle comunita di emigrati (Bilingualism and Immigration: A Sociolinguistic View of the European Plan for the Maintainance of National Languages in Immigrant Communities).  

ERIC Educational Resources Information Center

Outlines the European Economic Community's (EEC) plan for the maintainance of national languages among immigrants. Describes the variety of objectives behind the EEC's linguistic policy as incompatible with the creation of a unified instructional approach. Emphasizes that dialects spoken within immigrant families create additional problems in…

Tosi, Arturo



Patrones de caza y éxito de captura de una población de águila pescadora (Pandion haliaetus) en Bahía Magdalena, Baja California Sur, México Hunting patterns and success of an osprey (Pandion haliaetus) population at Magdalena Bay, Baja California Sur, Mexico  

Microsoft Academic Search

In late autumn 2004 we studied the effect of water surface condition, wind speed, and tidal status on the hunting patterns (flapping, gliding, hovering) and hunting success of the osprey population at Magdalena Bay, Baja California Sur, Mexico. Through focal sightings we obtained the number of hunting dives, hunting length, and the proportion of hunting length invested in each pattern.

A Castellanos-Vera; E River


Trastornos Alimentarios y Funcionamiento Familiar Percibido en una Muestra de Estudiantes Secundarias de la Comuna de Concepción, Chile Eating Disorders and Perceived Family Functioning in a Sample of High School Students of Concepción, Chile  

Microsoft Academic Search

Eating disorders are highly prevalent in adolescence, have relative bad prognosis and present diffi culties for their treat- ment. Research indicates that families from adolescents suffering from eating disorders tend to be more dysfunctional than control families and that the quality of the family's functioning plays a key role in the course of the disease. The goal of this study

Claudia Cruzat; Patricio Ramírez; Roberto Melipillán; Paula Marzolo



Reaching Higher. A Parent's Guide to the Washington Assessment of Learning. Revised = Para llegar mas arriba. Una guia para padres sobre la evaluacion del aprendizaje de los estudiantes del estado de Washington (Washington Assessment of Student Learning). Revisado.  

ERIC Educational Resources Information Center

This guide in English and Spanish is designed to answer questions parents may have about the Washington Assessment of Student Learning (WASL), including how it will help improve their children's education, how it is scored, and how to use the information it provides. In Washington, clear educational goals for subject content, thinking skills, and…

Washington Office of the State Superintendent of Public Instruction, Olympia.


Introduccion a la Evaluacion: Una introduccion practica a la evaluacion en proyectos para la ninez de temprana edad (Introducing Evaluation: A Practical Introduction to Evaluation in Early Childhood Projects).  

ERIC Educational Resources Information Center

Developed for the staff of field projects, this booklet provides guidelines for evaluating projects to promote activities that will enhance the well-being of young children, their families, and their communities. The booklet aims to stimulate ideas and discussions, offers general principles to help in evaluation, and raises issues that encourage…

Eyken, Willem van der


Filling the gap in LNA antisense oligo gapmers: the effects of unlocked nucleic acid (UNA) and 4'-C-hydroxymethyl-DNA modifications on RNase H recruitment and efficacy of an LNA gapmer  

Microsoft Academic Search

Stability against nucleases, affinity for the targeted mRNA and the ability to recruit RNase H are prerequisites for antisense oligonucleotide (AON) applications where gene expression knockdown is required. Typically chimeric gapmer AON designs are used with a central continuous stretch of RNase H recruiting nucleotides (e.g. phosphorothioate DNA), flanked by affinity and stability-enhancing modified nucleotides. However, many types of nucleotide

Kees Fluiter; Olaf R. F. Mook; Jeroen Vreijling; N. Langkjaer; Torben Højland; Jesper Wengel; Frank Baas



Definizione di una tipologia testuale integrabile in un curricolo didattico di italiano per stranieri (Defining a Textual Classification To Be Used in a Course on Teaching Italian as a Foreign Language).  

ERIC Educational Resources Information Center

Analyzes the different types of texts that can be used in the teaching of Italian as a foreign language. Based on their communicative function, the texts are divided into the following categories: description, narration, instruction, argumentation, and exposition. Grids with examples of each type of text are included. (CFM)

Diadori, Pierangela



Miofibroblastoma extramamario. A propósito de un caso con receptores de progesterona positivos en una mujer embarazada A case report of extramammary myofibroblastoma with progesterone receptors in a pregnant woman  

Microsoft Academic Search

SUMMARY Mammary myofibroblastoma is a recently described benign tumour with morphological, immunophenotypic and cytogenetic features that suggest a close relation with spin- dle cell lipoma and cellular angiofibroma. An extramam- mary location is exceptionally rare, with only 12 cases published to date. The present case is an extramammary myofibroblastoma occuring in the arm of a pregnant woman. The tumour was

Luis Beltrán Fernández; Dorota Markiewicz



Microsoft Academic Search

In Maracaibo lake basin, around 20% of crossbred dual pur- pose cows are considered repeat breeders, having long post- partum intervals and impeding the main farm objective of one calf per cow, per year. The aim of this study was to evaluate the effect of the use of an intrauterine infusion with Listerine ® alone or associated with progestins for



Pautas para Organizar Una Actividad de Capacitacion: Un Seminario-Taller para el Desarrollo de Personal de Direccion de Sistemas Educativos (Guidelines to Organize a Training Activity: A Workshop for Management Development of Educational Systems).  

ERIC Educational Resources Information Center

Often personnel performing managerial functions within educational systems are educators with almost no training in management. This paper presents ideas on how to organize a training activity intended to develop management knowledge and skills among educational systems officials and to implement an organizational self-study on management…

Valle, Victor M.


Gestión del conocimiento y desarrollo rural Enseñanzas a partir del estudio de caso de una empresa familiar innovadora y socialmente responsable en la producción orgánica de leche y lácteos en México  

Microsoft Academic Search

En la actualidad, la producción y transformación de alimentos son actividades en las que se articulan estrategias locales y globales. De frente a la sociedad del conocimiento, se requiere la incorporación de conocimiento en la generación de valor, en particular el conocimiento introducido mediante la gestión que desempeñan las empresas en su relación con instituciones de investigación y educación superior

Maria del Carmen del Valle Rivera



Fields without Borders: An Anthology of Documentary Writing and Photography by Student Action with Farmworkers' Interns = Campos sin Fronteras: Una Antologia de Obras Escritas y Fotografia por Estudiantes Internos de Accion Estudiantil con Trabajadores Agricolas.  

ERIC Educational Resources Information Center

In this booklet, essays and poems, presented both in English and in Spanish, portray the feelings, conditions, and economic plight of migrant and seasonal farmworkers in North and South Carolina, often in their own words. A preface describes Student Action with Farmworkers summer internships in which college students spend 10 weeks working with…

Manly, Libby, Ed.; Okie, Alejandra, Ed.; Wiggins, Melinda, Ed.


Un Nuevo Convenio para el Aprendizaje: Una Sociedad para Mejorar los Resultados Educativos en el Estado de Nueva York (A New Compact for Learning: A Partnership To Improve Educational Results in New York State).  

ERIC Educational Resources Information Center

This Spanish translation of the abridged version of "A New Compact for Learning" acknowledges the current U.S. education system's inadequacy to educate U.S. citizenry and introduces New York State's New Compact for Learning, intended as a plan to reorganize New York's own system. The compact's fundamental principles are: (1) recognizing that all…

New York State Education Dept., Albany. Office of Elementary, Middle and Secondary Education.



Microsoft Academic Search

Se plantea en el presente trabajo la utilidad de estudiar la datación del papel R. Romaní, al ser el más utilizado en la composición y copia musical en el último cuarto del siglo XVIII español. Tras plantear las condiciones que dicho estudio debería observar, se muestran los resultados de la investigación desarrollada en el Archivo del Palacio Real de Madrid,

Germán Labrador López de Azcona



La Desercion Escolar en los Niveles de Sexto y Noveno Grado: Una Comparacion Entre Zonas Rurales y Urbanas. Boletin 219 (The Educational Desertion in the 6th and 9th Grades: A Comparison Between Rural and Urban Zones. Bulletin 219).  

ERIC Educational Resources Information Center

In 1962 and again in 1965, a group of sixth and ninth grade students in selected schools in four Puerto Rican communities were interviewed to investigate the factors influencing students' decision to withdraw from school before completing twelfth grade and to identify some characteristics of dropouts. Of 616 students interviewed in 1962, 20.9% of…

Lopez, Maria I. Hernandez; And Others


Receta para el Exito. Una Guia Actualizada para Padres sobre el Mejoramiento de las Escuelas de Colorado y Logros Estudiantiles (Recipe for Success: An Updated Parents' Guide to Improving Colorado Schools and Student Achievement).  

ERIC Educational Resources Information Center

This Spanish language guide describes ways that parents can help improve student achievement and school quality. It answers such questions as: how to choose the right early-education opportunity for a preschooler; how to make sure a 5-year-old is ready for school; how to help a daughter do well in school; how to work with a daughter's or son's…

Taher, Bonnie; Durr, Pamela


El Instituto de Nutrici?n de Centro Am?rica y Panam?: Servicios de Informaci?n Cient?fica en Una Regi?n en V?a de Desarrollo *  

PubMed Central

Pioneering scientific information in underdeveloped areas poses several problems, such as (1) lack of understanding on the part of key functionaries as to the why, what, and when of information services; (2) lack of trained personnel to assume the responsibility for such services; (3) lack of economic resources; and (4) lack of information pertaining to available bibliographical sources in the particular area or region. The Bibliographic and Documentation Service of the Institute of Nutrition of Central America and Panama (INCAP) provides, in addition to the customary services, technical assistance for the organization or reorganization of biomedical libraries and makes INCAP library materials available to member countries, either by loan or photocopy. Although the program was designed for the member countries, INCAP tries to make its services available to other Latin American nations, Africa, and Asia, where similar nutritional problems are being studied.

Flores, Raquel; Corado, Adelina; Giron, Arturo



Validacion de una Version Espanola del Child Abuse Potential Inventory para Su Uso en Espana (Validation of a Spanish Version of the Child Abuse Potential Inventory in Use in Spain).  

ERIC Educational Resources Information Center

A Spanish translation of the Child Abuse Potential Inventory was administrated to 66 perpetrators of child maltreatment and physical abuse and a demographically representative sample (n=829) of the general population of the Pais Vasco in Spain. The measure correctly identified 98.3 percent of the physical child abuse perpetrators. (Author/DB)

De Paul, Joaquin; And Others



Estudio de la distribucion de plutonio en el ecosistema marino de Palomares despues de una descarga accidental de un aerosol de transuranidos. (Study on plutonium distribution in Palomares ecosystem after an accidental aerosol release of transuranic radionuclides).  

National Technical Information Service (NTIS)

A discharge of plutonium and transuranic elements accidentally ocurred near Palomares (Almeria, Spain) in 1966. After decontamining operations, about 10 g of finely dispersed plutonium remained on the soil and was spreaded on the sorroundings and into Med...

L. Gasco Sanchez



Estudio de la distribucion de plutinio en el ecosistema marino de Palomares despues de una descarga accidental de un aerosol de transuranidos. (Study on plutonium distribution in Palomares ecosystem after an accidental aerosol release of transuranic radionuclides).  

National Technical Information Service (NTIS)

A discharge of plutonium and transuranic elements accidentally ocurred near Palomares (Almeria, Spain) in 1966. After decontaminating operations, about 10 g of finely dispersed plutonium remained on the soil and was spreaded on the surroundings and into M...

C. Gasco



EFICIENCIA DE USO Y DINÁMICA DEL NITRÓGENO EN UNA ROTACIÓN CON Y SIN USO DE RESIDUOS 1 Nitrogen use efficiency and dynamics in a rotation with and without use of residues 1  

Microsoft Academic Search

A B S T R A C T With the objective of studying N use efficiency and dynamics in a rotation with and without management of residues, a labeled-N ( 15 N) experiment was established, in a volcanic soil (Typic Melanoxerand), under irrigation. 15 N-labeled micro-plots were installed on a 4-year rotation. 15 N was applied only once, as labeled

Erick Zagal; Nicasio Rodríguez; Iván Vidal; Glenn Hofmann



Molecular evaluation of extracellular activity of medicinal herb Clinacanthus nutans against herpes simplex virus type-2.  


Clinacanthus nutans (Burm. f.) Lindau (C. nutans), a medicinal herb belonging to the family Acanthaceae, has traditionally been used in herpes simplex virus (HSV) treatment in Thailand. Clinical trials have indicated that topical preparations produced from its extracts were effective in HSV-2 treatment. However, there is no clear evidence of the mechanism of action or a molecular target of C. nutans. In this study, the extracellular activity of C. nutans extracts against HSV-2 infected on HEp-2 cells was investigated in terms of its molecular aspects. HSV-2 was treated with the extracts and adsorped into the HEp-2 cells. After infection, HSV-2 DNA quantities in the infected cells were assessed and compared by the quantitative dot blot hybridisation technique. The results showed that treating the viruses with either less or more highly purified extracts before infection resulted in great reductions of viral infectivity. Further investigation was performed by Western blot analysis to determine the activities of the extracts on the viral proteins. At least eight viral proteins of the infected cell proteins (ICP) and some structural proteins, including 146, 125, 78, 69, 55, 44, 40 and 20 KDa proteins, were depleted and reduced gradually with higher and lower concentrated herb extracts, respectively. These suggest that the C. nutans extracts highly inactivated or inhibited HSV-2 before infection. PMID:20140802

Vachirayonstien, Thaveechai; Promkhatkaew, Duanthanorm; Bunjob, Malee; Chueyprom, Asawachai; Chavalittumrong, Pranee; Sawanpanyalert, Pathom



Chemical composition and antioxidant activity of Strobilanthes crispus leaf extract.  


This study investigated the components present in and the total antioxidant activity of leaves of Strobilanthes crispus (L.) Bremek or Saricocalyx crispus (L.) Bremek (Acanthacea). Proximate analyses and total antioxidant activity using ferric thiocyanate and thiobarbituric acid methods were employed. Minerals content was determined using the atomic absorption spectrophotometer, whereas the water-soluble vitamins were determined by means of the UV-VIS spectrophotometer (vitamin C) and fluorimeter (vitamins B(1) and B(2)). Catechin, tannin, caffeine, and alkaloid contents were also studied. All data were compared to the previously reported results of Yerbamate, green tea, black tea, and Indian tea. The dried leaves contained a high amount of total ash (21.6%) as a result of a high amount of minerals including potassium (51%), calcium (24%), sodium (13%), iron (1%), and phosphorus (1%). High content of water-soluble vitamins (C, B(1), and B(2)) contributed to the high antioxidant activity of the leaves. The leaves also contained a moderate amount of other proximate composition as well as other compounds such as catechins, alkaloids, caffeine, and tannin, contributing further to the total antioxidant activity. Catechins of Strobilanthes crispus leaves showed highest antioxidant activity when compared to Yerbamate and vitamin E. Consumption of the leafy extract daily (5 g/day) as an herbal tea could contribute to the additional nutrients and antioxidants needed in the body to enhance the defense system, especially toward the incidence of degenerative diseases. PMID:11137889

Ismail; Manickam; Danial; Rahmat; Yahaya



[Annotated list of the plants of the Tortuguero National Park].  


The floodplains of Tortuguero, in northeastern Costa Rica, stand as one of the richest plant-species regions in Central America. In this paper, we present the annotated check-list of vascular plants that are present within the rainforest of Tortuguero National Park (TNP), a 26 604h land that protects most of the biological diversity of these plains. Our list resulted from collections made in 2012, as well as the examination of material mantained at the Herbarium of the National Biodiversity Institute of Costa Rica, INBio (ATTA Database) and in the TROPICOS database. A total of 732 vascular plant species included in 413 genera are known to the Park. Two of these species have limited distributions and are endemic to Costa Rica: Pseuderanthemum pittieri (Acanthaceae) and Paullinia austin-smithii (Sapindaceae). Ninety species have known ethnobotanical uses. The high diversity in plant species reported here for the forest environments of Tortuguero contrasts with the low species diversity previously reported in the palm-swamps that characterize the riverine habitats within the Park. PMID:24459756

Hurtado-Hernández, Priscilla M; González-Ramírez, José A



Aldose reductase inhibitory, anti-cataract and antioxidant potential of selected medicinal plants from the Marathwada region, India.  


The water, ethanol and chloroform extracts of selected plants such as Adhatoda vasica (L.) (Acanthaceae), Caesalpinia bonduc (L.), Cassia fistula (L.) (Caesalpiniaceae) and Biophytum sensitivum (L.) (Oxalidaceae) were evaluated for rat lens aldose reductase inhibitory (RLAR) potential, anti-cataract and antioxidant activities. All the samples inhibited the aldose reductase considerably and exhibited anti-cataract activity, while C. fistula (IC(50), 0.154 mg mL(-1)) showed significant RLAR inhibitory activity as compared to the other tested samples, and was further found to be more effective in maintaining sugar-induced lens opacity in the rat lens model. The antioxidant potential of plant extracts was determined using DPPH (2,2-diphenyl-1-picryl hydrazine), hydroxyl (OH), nitric oxide (NO) and hydrogen peroxide (H(2)O(2)) scavenging activities, along with determination of reducing power, ferrous ion chelating ability and inhibition of polyphenol oxidase (PPO). The extracts of the tested plant showed significant free radical scavenging activities and inhibited the activity of enzyme PPO, a model oxidising enzyme. The plant samples were found to possess considerable amounts of vitamin C, total polyphenols and flavonoids. PMID:21462076

Gacche, R N; Dhole, N A



Effects of rhinacanthin-C on function and expression of drug efflux transporters in Caco-2 cells.  


Rhinacanthin-C is a bioactive naphthoquinone ester found in Rhinacanthus nasutus Kurz (Acanthaceae). This compound has potential therapeutic value as an anticancer and antiviral agent. The purposes of this study were to determine the effects of this compound on the function and the expression of P-glycoprotein (P-gp) and multidrug resistance-associated protein 2 (MRP2), using the in vitro model of Caco-2 cells. The activities of P-gp and MRP2 were determined by following the intracellular accumulation of calcein and 5(6)-carboxy-2',7'-dichlorofluorescein in the uptake assays with fluorescence spectroscopy. The expression of P-gp after prolonged exposure was evaluated by flow cytometry with the use of a fluorescein isothiocyanate-conjugated anti-human P-gp antibody. Our results showed that the inhibitory effect of rhinacanthin-C was more potent toward P-gp than MRP2, and was reversible. Short-term exposure of Caco-2 cells with rhinacanthin-C (100 ?M) resulted in increase in P-gp expression without any significant change in its function. Extended exposure of Caco-2 cells to the naphthoquinone at the highest non-cytotoxic concentration (0.625 ?M) for 7 days had no effect on the expression and the function of P-gp. These findings suggested that rhinacanthin-C might raise the problem of herb-drug interaction when co-administered with other P-gp substrates. PMID:23742857

Wongwanakul, Ratjika; Vardhanabhuti, Nontima; Siripong, Pongpun; Jianmongkol, Suree



Phytochemical and pharmacological potential of Acanthus ilicifolius.  


Acanthus ilicifolius (Acanthaceae) has received considerable attention due to its wide range of secondary metabolites and its traditional usage in Indian and Chinese system of medicine. This plant is reported to be a mangrove. Mangrove survives in the most hostile environment with fluctuating tidal and saline regime. Hence, these plants are considered to be rich sources of steroids, triterpenoids, saponins, flavonoids, alkaloids, and tannins. Present review article is an attempt to cover recent developments in phytochemical and pharmacological potential of drug. Traditionally, the plant has been used for dyspepsia, paralysis, asthsma, headache, rheumatism, and skin diseases. The plant is known as 'Krishnasaireyaka' or 'Karimkurunji', is one of the 9 plants equated to the drug 'Sahachara,' which is used in Ayurvedic medicine for rheumatic complaints. The plant has not been explored to its full potential. The review will be a good reference tool for investigators who wish to work on natural compounds with free radical scavenging activity to combat diseases associated with stress. PMID:23559819

Singh, Dharya; Aeri, Vidhu



Isolation, characterisation and biological evaluation of a phenoxazine, a natural dyestuff isolated from leaves of Peristrophe bivalvis.  


Peristrophe bivalvis (L.) Merr. (Acanthaceae) is a wild growing and cultivated plant used for dyeing of foods by the ethnic minorities of Vietnam. The major component of the colour aqueous extract (CAE) of its leaves was identified as peristrophine by spectral analysis, especially the 2D NMR spectra (HSQC, HMBC and NOESY). Considering the widespread utilisation of the decoction of this plant for food dyeing, we evaluated the acute oral toxicity of the CAE. Based on the results in an acute toxicity study in mice, the LD50 value of the CAE was determined as 9100?±?290?mg?kg(-1) body weight. Additionally, in vitro cytotoxic assay showed an inhibition of peristrophine against Hepatocellular carcinoma (HepG2, IC503.90?µg?mL(-1)). CAE and peristrophine (1) have also been tested for their ability to affect the cell number of the OCI acute myeloid leukaemia cell line. CAE and peristrophine significantly decreased the OCI cell number at different concentrations and times of treatment. PMID:22712581

Thuy, Trinh Thi; Huong, Nguyen Thi Thanh; Nhung, Le Thi Hong; Ninh, Pham Thi; Delfino, Domenico V; Van Sung, Tran



Microsatellite-based evidences of genetic bottlenecks in the cryptic species "Andrographis paniculata Nees": a potential anticancer agent.  


Andrographis paniculata (AP) is a medicinal plant species introduced into Malaysia. To address the genetic structure and evolutionary connectedness of the Malaysian AP with the Indian AP, a DNA sequence analysis was conducted based on 24 microsatellite markers. Out of the 24 primer sets, seven novel microsatellite primers were designed and amplified intra-specifically according to the available Indian AP sequences at the National Centre for Biotechnology Information (NCBI), where 17 of them were amplified using the cross-species strategy by employing the primers belonging to Acanthus ilicifolius Linn (Acanthaceae) and Lumnitzera racemosa Wild (Combretaceae). The primers were then applied on the Malaysian AP accessions. Sixteen of the new microsatellite loci were amplified successfully. Analysis of these microsatellite sequences, revealed some significant differences between the Indian and Malaysian AP accessions in terms of the size and type of the repeat motifs. These findings depicted the cryptic feature of this species. Despite identifying several heterozygous alleles no polymorphism was observed in the detected loci of the selected accessions. This situation was in concordance with the presence of "fixed heterozygosity" phenomenon in the mentioned loci. Accordingly, this was fully consistent with the occurrence of the genetic bottleneck and founder effect within Malaysian AP population. Apart from the amplification of new microsatellites in this species, our observations could be in agreement with the risk of genetic depletion and consequently extinction of this precious herb in Malaysia. This issue should be taken into consideration in the future studies. PMID:23086278

Valdiani, Alireza; Javanmard, Arash; Talei, Daryush; Tan, Soon Guan; Nikzad, Sonia; Kadir, Mihdzar Abdul; Abdullah, Siti Nor Akmar



In vitro anti-oxidant and anti-cancer activity of methanolic extract from Sanchezia speciosa leaves.  


Sanchezia speciosa, is a bushy shrub from Acanthaceae family which commonly grows in tropical areas of South and Central America. In this study, we employed MTT assay to test the cytotoxicity of that methanolic fraction of S. speciosa leaves on MCF-7 human breast cancer, SK-MEL-5 human malignant melanoma and human umbilical vein endothelial cells, HUVEC cells. The extract showed highest activity on MCF-7 and moderate cytotoxicity towards SK-MEL-5. In contrast, the extract demonstrated lowest cell growth inhibition activity on HUVEC cells, indicating better selectivity compare to standard drug, doxorubicin. In addition, we also performed ORAC assay to determine the radical scavenging capacity of methanolic extract of S. speciosa leaves. The extract exhibited nearly similar anti-oxidant activity as quercetin, suggesting S. speciosa leaves as a potential source of natural anti-oxidant. To the best of our knowledge, this is the first report on anti-oxidant and cytotoxic activity of S. speciosa. PMID:24506026

Paydar, Mohammadjavad; Wong, Yi Li; Moharam, Bushra Abdulkarim; Wong, Won Fen; Looi, Chung Yeng



Anti-inflammatory and antimicrobial properties of pyrroloquinazoline alkaloids from Adhatoda vasica Nees.  


Adhatoda vasica Nees, Acanthaceae, is well known plant in Ayurveda and Unani medicine. The purpose of this study was to characterize the most bioactive phytochemicals viz., vasicine, vasicinone, vasicine acetate, 2-acetyl benzyl amine, vasicinolone present in the chloroform fraction having anti-inflammatory and antimicrobial activities. The anti-inflammatory activity was tested by using carrageenan and CFA-model induced paw oedema. The antimicrobial activity of isolated compounds was assessed by using the microdilution method. The observed results revealed that vasicine showed most potent anti-inflammatory effects (59.51%) at the dose of 20.0mg/kg at 6h after carrageenan injection and maximum inhibition rate was observed of vasicinone (63.94%) at the dose of 10.0mg/kg at 4 days after CFA injection. The strong antibacterial activity was exhibited by vasicine at 20?g/ml dose against E. coli and also demonstrated maximum antifungal activity against C. albicans at the dose of >55?g/ml. All the five alkaloids demonstrated significant anti-inflammatory and antimicrobial activities. PMID:23357363

Singh, Bharat; Sharma, Ram Avtar



Hepatoprotective activity of Andrographis paniculata and Swertia chirayita.  


Andrographis paniculata (Family: Acanthaceae) and Swertia chirayita (Family: Gentianaceae) are two controversial medicinal plants used as Kiriyattu, having similar therapeutic action and are used as a hepatoprotective and hepatostimulative agent. A. paniculata grows in southern parts of India and S. chirayita in the Himalayan region. The present work concerns on the ability of the extracts of these plants to offer protection against acute hepatotoxicity induced by paracetamol (150 mg/kg) in Swiss albino mice. Oral administration of A. paniculata or S. chirayita extract (100-200mg/kg) offered a significant dose dependent protection against paracetamol induced hepatotoxicity as assessed in terms of biochemical and histopathological parameters. The paracetamol induced elevated levels of serum marker enzymes such as serum glutamate pyruvate transaminase (GPT), serum glutamate oxaloacetate transaminase (GOT), alkaline phosphatase (ALP), and bilirubin in peripheral blood serum and distorted hepatic tissue architecture along with increased levels of lipid peroxides (LPO) and reduction of superoxide dismutase (SOD), catalase, reduced glutathione (GSH) and glutathione peroxidase (GPx) in liver tissue. Administration of the plant extracts after paracetamol insult restored the levels of these parameters to control (untreated) levels. Thus the present study revealed that the extracts of A. paniculata or S. chirayita offered protection against hepatotoxicity induced by paracetamol. PMID:21983487

Nagalekshmi, R; Menon, Aditya; Chandrasekharan, Dhanya K; Nair, Cherupally Krishnan Krishnan



Inhibitory effect of liposomal rhinacanthin-N isolated from Rhinacanthus nasutus on pulmonary metastasis in mice.  


We previously observed that rhinacanthins, which are the main naphthoquinone esters isolated from the roots of a Thai medicinal plant, Rhinacanthus nasutus KURZ. (family Acanthaceae), suppress the growth of Meth-A sarcoma in the tumor-bearing mice and that rhinacanthin-N has the strongest antitumor activity among these naphthoquinone esters tested. In the present study, we investigated the effect of rhinacanthin-N on pulmonary metastasis induced by B16F10 melanoma cells in mice. C57BL/6 male mice were injected intravenously with B16F10 melanoma cells, and liposomal rhinacanthin-N was administered intraperitoneally from day 1 to 7 after tumor implantation. Liposomes were used to formulate an injectable form of the hydrophobic agent. Treatment of the mice with 5 or 10?mg/kg/d of liposomal rhinacanthin-N significantly inhibited the pulmonary metastatic colonization of the melanoma cells. Based on these data, our findings demonstrate that rhinacanthin-N possesses antimetastatic efficacy, which may make it a lead compound for the development of a new anticancer drug for use in cancer chemotherapy. PMID:22791173

Siripong, Pongpun; Yahuafai, Jantana; Piyaviriyakul, Suratsawadee; Kanokmedhakul, Kwanjai; Koide, Hiroyuki; Ishii, Takayuki; Shimizu, Kosuke; Ruchirawat, Somsak; Oku, Naoto



Harnessing the medicinal properties of Andrographis paniculata for diseases and beyond: a review of its phytochemistry and pharmacology  

PubMed Central

Andrographis paniculata Wall (family Acanthaceae) is one of the most popular medicinal plants used traditionally for the treatment of array of diseases such as cancer, diabetes, high blood pressure, ulcer, leprosy, bronchitis, skin diseases, flatulence, colic, influenza, dysentery, dyspepsia and malaria for centuries in Asia, America and Africa continents. It possesses several photochemical constituents with unique and interesting biological properties. This review describes the past and present state of research on Andrographis paniculata with respect to the medicinal usage, phytochemistry, pharmacological activities, toxicity profile and therapeutic usage, in order to bridge the gap requiring future research opportunities. This review is based on literature study on scientific journals and books from library and electronic sources. Diterpenes, flavonoids, xanthones, noriridoides and other miscellaneous compounds have been isolated from the plant. Extract and pure compounds of the plant have been reported for their anti-microbial, cytotoxicity, anti-protozoan, anti-inflammatory, anti-oxidant, immunostimulant, anti-diabetic, anti-infective, anti-angiogenic, hepato-renal protective, sex hormone/sexual function modulation, liver enzymes modulation insecticidal and toxicity activities. The results of numerous toxicity evaluations of extracts and metabolites isolated from this plant did not show any significant acute toxicity in experimental animals. Detailed and more comprehensive toxicity profile on mammalian tissues and organs is needed in future studies.

Okhuarobo, Agbonlahor; Falodun, Joyce Ehizogie; Erharuyi, Osayemwenre; Imieje, Vincent; Falodun, Abiodun; Langer, Peter



Making iridoids/secoiridoids and monoterpenoid indole alkaloids: progress on pathway elucidation.  


Members of the Acanthaceae, Apocynaceae, Bignoniaceae, Caprifoliaceae, Gentianaceae, Labiatae, Lamiaceae, Loasaceae, Loganiaceae, Oleaceae, Plantaginaceae, Rubiaceae, Saxifragaceae, Scrophulariaceae, Valerianaceae, and Verbenaceae plant families are well known to accumulate thousands of bioactive iridoids/secoiridoids while the Apocynaceae, Loganiaceae and Rubiaceae families also accumulate thousands of bioactive monoterpenoid indole alkaloids (MIAs), mostly derived from the secologanin and tryptamine precursors. Several large-scale RNA-sequencing projects have greatly advanced the tools available for identifying candidate genes whose gene products are involved in the biosynthesis of iridoids/MIAs. This has led to the rapid comparative bioinformatics guided elucidation of several key remaining steps in secologanin biosynthesis as well as other steps in MIA biosynthesis. The availability of these tools will permit broad scale biochemical and molecular description of the reactions required for making thousands of iridoid/MIAs. This information will advance our understanding of the evolutionary and ecological roles played by these metabolites in Nature and the genes will be used for biotechnological production of useful iridoids/MIAs. PMID:24709280

De Luca, Vincenzo; Salim, Vonny; Thamm, Antje; Masada, Sayaka Atsumi; Yu, Fang



Reversal of cadmium chloride-induced oxidative stress and genotoxicity by Adhatoda vasica extract in Swiss albino mice.  


Adhatoda vasica Nees (Acanthaceae) that is used by Ayurvedic physicians possesses some established medicinal properties. Environmental and occupational exposure with cadmium affects the renal system adversely. Cadmium is an established genotoxic agent. In the present study, we evaluated the antioxidant and anticlastogenic efficacy of A. vasica against cadmium chloride (CdCl2)-induced renal oxidative stress and genotoxicity in Swiss albino mice. A single intraperitoneal dose of CdCl2 (5 mg\\kg BW) resulted in significant (p<0.001) increase in chromosomal aberration and micronuclei formation. Oral administration of A. vasica at two doses (50 and 100 mg/kg BW) for seven consecutive days showed significant (p<0.001) suppression of mutagenic effects of CdCl2 in plant-pretreated groups. To study the mechanism by which A. vasica exerts its antimutagenic potential, enzymes involved in metabolism and detoxification were also estimated. Cadmium intoxication altered the antioxidant levels and enhanced MDA formation significantly (p<0.001). A. vasica showed significant (p<0.001) recovery in antioxidant status, viz., GSH content, its dependent enzymes, and catalase activity. Prophylactic pretreatment of A. vasica extract in cadmium-intoxicated mice showed marked (p<0.001) inhibition of lipid peroxidation (LPO) and xanthine oxidase (XO) activity. The present findings support that antimutagenic efficacy of A. vasica can be attributed to its restoring effects on antioxidant status and suppression of MDA level formation. PMID:16943607

Jahangir, Tamanna; Khan, Tajdar Husain; Prasad, Lakshmi; Sultana, Sarwat



Elicitation of andrographolide in the suspension cultures of Andrographis paniculata.  


Andrographis paniculata belonging to the family Acanthaceae produces a group of diterpene lactones, one of which is the pharmaceutically important-andrographolide. It is known to possess various important biological properties like anticancer, anti-HIV, anti-inflammatory, etc. This is the first report on the production of andrographolide in the cell suspension cultures of Andrographis paniculata by 'elicitation'. Elicitation was attempted to enhance the andrographolide content in the suspension cultures of Andrographis paniculata and also to ascertain its stimulation under stress conditions or in response to pathogen attack. The maximum andrographolide production was found to be 1.53 mg/g dry cell weight (DCW) at the end of stationary phase during the growth curve. The biotic elicitors (yeast, Escherichia coli, Bacillus subtilis, Agrobacterium rhizogenes 532 and Agrobacterium tumefaciens C 58) were more effective in eliciting the response when compared to the abiotic elicitors (CdCl(2), AgNO(3), CuCl(2) and HgCl(2)). Yeast has shown to stimulate maximum accumulation of 13.5 mg/g DCW andrographolide, which was found to be 8.82-fold higher than the untreated cultures. PMID:23001530

Gandi, Suryakala; Rao, Kiranmayee; Chodisetti, Bhuvaneswari; Giri, Archana



Hypolipidemic effects of andrographolide and neoandrographolide in mice and rats.  


Andrographolide (AND) and neoandrographolide (NEO) are the diterpenoids from the Andrographis paniculata (Acanthaceae). It is reported the diterpenoids exhibit a wide spectrum of biological activities. The aim of this study was to investigate the hypolipidemic effect of AND and NEO in hyperlipidemic mice induced by 75% yolk emulsion and in hyperlipidemic rats induced by high fat emulsion, respectively. The results showed that the levels of triglyceride, total cholesterol (TC) and low-density lipoprotein cholesterol were reduced by AND and NEO in a dose-dependent tendency in mice. Compared with the model group, the plasma TC levels of experimental groups with AND and NEO at 100?mg/kg dosage decreased by 23.9 and 20.2% in rats, respectively (P?

Yang, Tao; Shi, Hai-xia; Wang, Zheng-tao; Wang, Chang-hong




Microsoft Academic Search

L'approccio comunemente utilizzato per il calcolo teorico del campo di deformazione indotto da una sorgente sismica in un mezzo elastico è basato sull'equivalenza fra una dislocazione di taglio elementare e una doppia coppia di forze puntiformi. Il campo prodotto da una sorgente di dimensioni finite viene poi ottenuto tramite sovrapposizione lineare dei campi generati da una distribuzione di doppie coppie

S. Tinti; A. Armigliato; A. Manucci


An additional ageing criterion for Penduline Tits (Remiz pendulinus)  

Microsoft Academic Search

Els individus adults de teixidor realitzen una muda completa després de la cria, mentre que els ocells del primer any efectuen una muda estival parcial, després de la qual retenen algunes cobertores grans. Alguns autors han suggerit que una part dels ocells joves mudarien totes les cobertores grans, i que seria possible confondre'ls amb ocells adults. D'una mostra de 156

Raimon Mariné; Jordi Figuerola; Ricard Gutiérrez



Argentina: Nacionalismo, Migración e Identidad  

Microsoft Academic Search

Las naciones no son una característica inherente al ser humano. Esto es real, pero hoy día el tenar una se ha convertido en imprescindible al punto de ser una tragedia el no tenerla. Miles de desplazados, apátridas, migrantes nos recuerdan esta realidad de una forma cruda y cruel. Por otro lado, en un planeta donde los estados tienden a borrar

María Eugenia Cruset



Microsoft Academic Search

La depresión es un problema serio de salud que puede afectar a personas de todas las edades, incluyendo a niños y adolescentes. Generalmente se define como una experiencia en la que persiste una disposición de ánimo triste o irritable, así como también anhedonia, una pérdida de la habilidad de experimentar placer en casi todas las actividades. Incluye también una gama



Microsoft Academic Search

Resumen. Las fundiciones blancas de hierro aleadas con cromo son unos productos que se obtienen mediante métodos de moldeo, que poseen una microestructura muy dura en la que sobresale la presencia de una importante cantidad de carburos de cromo intergranulares dispersos en una matriz martensítica. Su tratamiento térmico idóneo consiste en una austenización seguida de un temple y dos tratamientos

I. Fernández Pariente; F. J. Belzunce; C. Rodriguez; J. Riba



Microsoft Academic Search

En el presente trabajo, en una primera parte hacemos una breve descripción de las distintas visiones que intentan abordar el tema de las razones que hacen que los países enfrenten diferencias en los niveles de ingresos y tasas de crecimiento, lo cual permite hacer una clasificación de países pobres y países ricos. En la segunda parte, realizamos una serie de

Marco Aurelio Mathus Robles



Cytotoxic activity of Justicia spicigera is inhibited by bcl-2 proto-oncogene and induces apoptosis in a cell cycle dependent fashion.  


Identification of organic compounds from plants is of clinical significance because of the effect that they might have in patients with haematopoietic disorders. We studied the effect of the plant extract Justicia spicigera (Acanthaceae) in different haematopoietic cells: human leukaemic cell lines, umbilical cord blood cells, and mouse bone marrow cells. By examining colony formation and performing the MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide) assay it was shown that the plant extract of Justicia spicigera contains cytotoxic factors for leukaemic cells and has no proliferative activity on normal haematopoietic progenitor cells. Our results show that this plant extract induces apoptosis in the human leukaemia cell line TF-1, but not in the bcl-2 transfectant cell line TB-1. Similar results were obtained using a haemopoietic cell line 32D and 32DBcl2. The cultures of umbilical cord blood cells and mouse bone marrow that contain granulocyte-macrophage colony-stimulating factor (GM-CSF) do not proliferate or become terminally differentiated in the presence of the infusion of Justicia spicigera. GM-CSF that acts by abrogating programmed cell death is not sufficient to inhibit the apoptotic stimulus in TF-1 and 32D cells. Moreover mouse fibroblasts (3T3) and two cervical carcinoma cell lines CALO and INBL, undergo apoptosis in the presence of different concentrations of an infusion from the plant. Our data show that there is a strong correlation between the cytotoxic effect and cell proliferation. Together, these results indicate that the plant infusion of Justicia spicigera does not contain any haematopoietic activity, induces apoptosis inhibited by bcl-2 and is linked to cell proliferation. PMID:11746862

Cáceres-Cortés, J R; Cantú-Garza, F A; Mendoza-Mata, M T; Chavez-González, M A; Ramos-Mandujano, G; Zambrano-Ramírez, I R



In vitro antimalarial activity of extracts of some plants from a biological reserve in Costa Rica.  


Treatment with the usual antimalarial drugs, have induced parasite resistance, reinforcing the need to finding natural antimalarial components that would be found on plants from the forest. Therefore, we decided to look for these components in Costa Rican plants from a protected forest area. Fresh and dry extracts of roots, bark, leaves, flowers and fruits of 25 plants from a biological reserve in Costa Rica, Reserva Biol6gica Alberto Manuel Brenes (REBAMB), were studied in vitro for the presence of substances with antimalarial activity. By studying the inhibition of P berghei schizogony, we assessed the antimalarial activity of several plant extracts: Aphelandra aurantiaca, A. tridentata (Acanthaceae); Xanthosoma undipes (Araceae); Iriartea deltoidea (Arecaceae); Neurolaena lobata (Asteraceae); Senna papillosa, Pterocarpus hayessi, Lonchocarpus pentaphyllus (Fabaceae); Nectandra membranacea, Persea povedae, Cinamomum chavarrianum (Lauraceae); Hampea appendiculata (Malvaceae); Ruagea glabra, Guarea glabra (Meliaceae); Psidium guajava (Myrtaceae); Bocconia frutescens (Papaveraceae); Piper friedrichsthalii (Piperaceae); Clematis dioica (Ranunculaceae); Prunus annularis (Rosaceae); Siparuna thecaphora (Siparunaceae); Solanum arboreum, Witheringia solanacea (Solanaceae); Ticodendrum incognitum (Ticodendraceae); Heliocarpus appendiculatus (Tiliaceae) and Myriocarpa longipes (Urticaceae). We used different parts of the plants as well as fresh and dried extracts for testing IC50. The solid content of the extracts ranged from 1-71.9 microg/mL. The fresh extracts showed stronger activity than the dry ones. Since the plants showing the strongest antimalarial activity are very common in Central America, and some similar genera of these plants have shown positives results in South America, we considered important to present these findings for discussion. On the other hand, this is the first systematic study of this kind ever realized in a circumscribed and protected area of Costa Rica. PMID:23894953

Chinchilla, Misael; Valerio, Idalia; Sánchez, Ronald; Mora, Víctor; Bagnarello, Vanessa; Martínez, Laura; Gonzalez, Antonieta; Vanegas, Juan Carlos; Apestegui, Alvaro



In vitro antioxidant potential of dicliptera roxburghiana  

PubMed Central

Background Stress caused by free radicals accumulation result into many hazardous diseases. A number of investigations are focusing to find out the plant oriented natural antioxidant moieties. The basic aim of this research was to investigate the antioxidant potential, total Phenolic and flavonoids contents and photochemical screening of the crude methanol extract and its derived various fractions Dicliptera roxburghiana of Acanthaceae family. Methods Crude methanol extract of aerial parts of Dicliptera roxburghiana (DRME) was partitioned in to n-hexane (DRHF), chloroform (DRCF), ethyl acetate (DREF), n-butanol (DRBF) and the remaining soluble portion as residual aqueous fraction (DRAF). We evaluated the antioxidant activities of the extract and various fractions through different analytical methods such as DPPH, superoxide anion, ABTS, H2O2, hydroxyl radical and phosphomolybdate radical inhibition. In vitro lipid peroxidation and reducing power of the plant was also analyzed. Total flavonoid and phenolic contents of the extract and all fractions were also quantified. Plant was also subjected for preliminary phytochemical screening to confirm the presence or absence of various constituents in the plant. Results Phytochemical screening confirmed the presence of flavonoids, phenolics, tannins, alkaloids, saponins, terpenoids and coumarines. Quantitative analysis revealed the maximum amount of total phenolic and flavonoid contents in DRME while lowest in DRHF. Methanol extract, DREF, DRCF and DRBF exhibited promising antioxidant potential for DPPH, ABTS, H2O2, phosphomolybdate, superoxide anion and hydroxyl radical scavenging capabilities, while these were not appreciable for DRHF and DRAF. All fractions except DRHF and DRAF possess strong reducing power ability and showed appreciable lipid peroxidation inhibition. Conclusion These research investigations revealed that Dicliptera roxburghiana is a potent source of natural antioxidants. Hence the plant can be used for management of different stress and anxiety related ailments.



The Gastroprotective Role of Acanthus ilicifolius - A Study to Unravel the Underlying Mechanism of Anti-Ulcer Activity.  


Acanthus ilicifolius (Acanthaceae), a mangrove medicinal plant, is widely used by the local inhabitants of the Sundarbans (India) to treat a variety of diseases. As a part of our continued search for novel bioactive products from mangrove medicinal plants, we were able to document the anti-inflammatory effects of this plant. In the present study, we have performed a detailed evaluation of the gastroprotective activity of the methanolic extract of Acanthus ilicifolius using different models of gastric ulceration. Unlike the conventional non-steroidal anti-inflammatory drugs, a methanolic extract of Acanthus ilicifolius leaves (MEAL) possessing significant anti-inflammatory properties, as revealed from our previous studies displayed in rats in dosages of 200 mg and 400 mg/kg BW after intraperitoneal administration, showed significant protective activity (anti-ulcer activity) against the gastric lesions induced by aspirin, indomethacin, stress, ethanol, and pylorus ligation. In pylorus-ligated rats, administration of Methanolic extract of Acanthus ilicifolius leaves (MEAL) significantly decreased gastric volume, acidity, and peptic activity. Moreover, pre-treatment with MEAL significantly restored the levels of reduced glutathione (GSH) and the antioxidant enzyme superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GPX), along with significant inhibition of both lipid peroxidation and myeloperoxidase (MPO) activity in pylorus-ligated animals. Ulceration induced with ethanol was significantly inhibited with MEAL, and the extract also resulted in the reduction of both lipid peroxidation and myeloperoxidase activity. Furthermore, in this experimental model, administration of MEAL improved the activities of SOD, CAT, GSH, and GPX. A similar pattern of action was also noticed in cold-restraint stress-induced (CRS) ulceration, where MEAL pre-treatment inhibited CRS-induced ulceration, improved the status of antioxidant enzymes, and also reduced the level of lipid peroxides. These results suggest that extracts of the leaves of Acanthus ilicifolius may exhibit anti-ulcer activities additional to the anti-inflammatory properties. PMID:23008816

Mani Senthil Kumar, K T; Puia, Zothan; Samanta, Samir K; Barik, Rajiv; Dutta, Arnab; Gorain, Bapi; Roy, Dilip K; Adhikari, Dipan; Karmakar, Sanmoy; Sen, Tuhinadri



Andrographolide and its analogues: versatile bioactive molecules for combating inflammation and cancer.  


1.?Andrographis paniculata (Burm. f) Nees, commonly known as 'king of bitters', is a herbaceous plant belonging to the Family Acanthaceae. It has been widely used for centuries in Asian countries like China, India, Thailand and Malaysia for the treatment of sore throat, flu and upper respiratory tract infections. 2.?Andrographolide, 14-deoxy-11,12-didehydroandrographolide and neoandrographolide are examples of the major labdane diterpenoids isolated from A. paniculata. These bioactive molecules have exhibited varying degrees of anti-inflammatory and anticancer activities in both in vitro and in vivo experimental models of inflammation and cancer. 3.?Extensive libraries of andrographolide analogues have been synthesised mainly by modifying the ?,?-unsaturated ?-butyrolactone moiety, the two double bonds ?(8,(17)) and ?(12,(13)) and the three hydroxyls at C-3 (secondary), C-14 (allylic) and C-19 (primary). Many of these synthetic analogues exhibit superior anticancer activity over the naturally occurring andrographolides. 4.?Andrographolide and its derivatives have been shown to have anti-inflammatory effects in experimental models of asthma, stroke and arthritis, as well as in patients with upper respiratory tract infections. Andrographolide reduces the production of cytokines, chemokines, adhesion molecules, nitric oxide and lipid mediators, probably via inhibition of the nuclear factor (NF)-?B signalling pathway. 5.?The anticancer mechanisms for andrographolide include inhibition of Janus tyrosine kinases-signal transducers and activators of transcription, phosphatidylinositol 3-kinase and NF-?B signalling pathways, suppression of heat shock protein 90, cyclins and cyclin-dependent kinases, metalloproteinases and growth factors, and the induction of tumour suppressor proteins p53 and p21, leading to inhibition of cancer cell proliferation, survival, metastasis and angiogenesis. 6.?Andrographolide drug discovery is a promising strategy for the development of a novel class of anti-inflammatory and anticancer drugs. PMID:22017767

Lim, Jonathan Chee Woei; Chan, Tze Khee; Ng, David S W; Sagineedu, Sreenivasa R; Stanslas, Johnson; Wong, W S Fred



Degradation studies on benzoxazinoids. Soil degradation dynamics of 2,4-dihydroxy-7-methoxy-(2H)-1,4-benzoxazin-3(4H)-one (DIMBOA) and its degradation products, phytotoxic allelochemicals from gramineae.  


Benzoxazinoids have been described as important allelochemicals from Gramineae as well as Acanthaceae, Rannunculaceae, and Scrophulariaceae plants. Several bioactivities have been described and evaluated for these compounds, including fungistatic, antifeedant, and phytotoxic. In ongoing studies about allelochemicals as natural herbicide models, the description of soil dynamics in phytotoxic agents has high importance, because the possible biotransformations developed by soil microorganisms could yield compounds with modified biological properties, affecting the overall allelopathic capability of the producer plant in a direct manner. Thus, a complete degradation study has been carried out for 2,4-dihydroxy-7-methoxy-(2H)-1,4-benzoxazin-3(4H)-one (DIMBOA) and 6-methoxybenzoxazolin-2(3H)-one (MBOA) in two soils cultivated with Triticum aestivum L. varieties (cv. Astron and cv. Ritmo). The main purpose was to identify degradation products and to elucidate biotransformation dynamics. Results show DIMBOA to degrade rapidly, yielding MBOA in both studied soils at different doses (t(1/2) = 31 +/- 1 h, n = 12) and reaching high conversions (80 +/- 4 h, n = 42). MBOA, an intermediate in the degradation pathway from DIMBOA to 2-amino-7-methoxy-3H-phenoxazin-3-one (AMPO), was more resistant toward biodegradation (t(1/2) = 5 +/- 1 days, n = 6). MBOA showed maximum conversions at a dose of 250 mg/kg of soil (36 +/- 3 days, n = 6). Soil belonging to T. aestivum cv. Ritmo crops showed higher degradation capacity than cv. Astron soil. AMPO was the final degradation product observed for DIMBOA in the soils and experimental conditions selected. Consequences for activity and stability of these compounds in relation to allelopathy are discussed. PMID:15478999

Macías, Francisco A; Oliveros-Bastidas, Alberto; Marín, David; Castellano, Diego; Simonet, Ana M; Molinillo, José M G



Caratterizzazione di una camera a estrapolazione come campione di misura per radiazione beta e realizzazione di un complesso di irraggiamento per la taratura di dosimetri. (Characterization of extrapolation chamber as measurement scale for beta radiations and implementation of irradiation equipment for dosimeter calibration).  

National Technical Information Service (NTIS)

A computerized system for beta dosimetry has been developed at the Divisione di Metrologia e Protezione delle Radiazioni Ionizzanti dell'ENEA Italian Agency for (New Technologies, Energy and Environment)di Bologna. The system allows an absolute measuremen...

E. Fantuzzi F. Monteventi




Microsoft Academic Search

RESUMO: O estudo foi baseado no projeto da OEA e adaptado pela Escola de Enfermagem da UNIFESP, buscando analisar a situação sobre os conteúdos de álcool e outras drogas ministradas na graduação de enfermagem no Brasil. O objetivo desse trabalho foi avaliar a situação do ensino sobre a temática, álcool e drogas, na graduação em Enfermagem da Universidade Federal do

Robison Boni; Sandra C Pillon; Elisangela C. Santos; Marcio W. Camata; Marluce S. Macieira


Estandarizacion de un metodo de cuantificacion de azufre por fluorescencia de rayos X, en una solucion extractora de sulfato disponible en suelo. (Standardization of a sulfur quantitative analysis method by X ray fluorescence in a leaching solution for bio-available sulfates in soil).  

National Technical Information Service (NTIS)

A method for bio-available sulfate analysis in soils is described. A Ca(H2PO4) leaching solution was used for soil samples treatment. A standard NaSO4 solution was used for preparing a calibration curve and also the fundamental parameters method approach ...

E. Morales S E. Aguilar S



Morphological and genetic comparative analyses of populations of Zoogoneticus quitzeoensis (Cyprinodontiformes:Goodeidae) from Central Mexico, with description of a new species Análisis comparativo morfológico y genético de diferentes poblaciones de Zoogoneticus quitzeoensis (Cyprinodontiformes:Goodeidae) del Centro de México, con la descripción de una especie nueva  

Microsoft Academic Search

A genetic and morphometric study of populations of Zoogoneticus quitzeoensis (Bean, 1898) from the Lerma and Ameca basins and Cuitzeo, Zacapu and Chapala Lakes in Central Mexico was conducted. For the genetic analysis, 7 populations were sampled and 2 monophyletic groups were identifi ed with a genetic difference of D HKY = 3.4% (3-3.8%), one being the populations from the

Domínguez-Domínguez Omar; Pérez-Rodríguez Rodolfo; Doadrio Ignacio



La Realidad de la Adquisicion del Lenguaje Oral y Escrito en una Muestra de Escuelas del Sector sur de Santiago. [The Reality of the Acquisition of Oral and Written Language in a Sample of Schools in the Southern Part of Santiago.  

ERIC Educational Resources Information Center

Investigated reading and writing skills of socioeconomically deprived first graders in Santiago, Chile. Found that the children had low achievement in reading and writing and at the end of the school year had not acquired sufficient linguistic competence to successfully master these skills. Also found a dissociation between observed practice and…

Oyarce, Carmen Diaz; Mujica, Elena Alvarez-Salamanca




Microsoft Academic Search

A strain of Cucumber Mosaic Virus (CMV, Cucumovirus), belonging to the subgroup CMV-Ib, was characterized as the causal agent of yellow mottle diseases in Amaryllis (Hippeastrum× hybridum Leopoldii) from commercial nurseries and home gardens in the State of México. The characterization was performed by indicator host range, morphology and size of viral particle under an electron microscope and determination of

Cleopatra Gutiérrez-Villegas; Roberto Ruiz-Medrano; Elías Piedra-Ibarra; Rodolfo De La Torre-Almaráz; Carretera México-Texcoco



EVALUACIÓN DE UNA FORMULACIÓN ATRACTICIDA PARA CONTROL DE Cydia pomonella (L.) (Lepidoptera: Tortricidae) EN MANZANOS EN EL ESTADO DE WASHINGTON, EE.UU.1 Assessment of an attracticide formulation to control Cydia pomonella (L.) (Lepidoptera: Tortricidae) in apple orchards in Washington State, USA1  

Microsoft Academic Search

A B S T R A C T Cydia pomonella control and male attraction of an attracticide (Sirene®CM: 0.16% codlemone + 6% permethrin) were evaluated. The attracticide had a long-lasting attraction (> 80 days) for males to regular traps. Only a small proportion of males (< 11%) approaching the attracticide (n = 64) was observed contacting the source. The attractant

Jay F. Brunner


A lesson to leArn from developed countries: the cAse of stAte BrAnching deregulAtion in the us* Una lección para aprender de los países desarrollados: el caso de la desregUlación de sUcUrsales en ee.UU  

Microsoft Academic Search

The era of US state branching deregulation started in 1970 and ended up with the enactment of the Riegle Neal Act of 1994. One of the purposes of the branching restriction was to avoid bank concentration. The following paper addresses the influence of the state deregulation on commercial banks' efficiency within the US. We calculate an indicator of bank efficiency

Jorge Guillén



Effect of lyophilized jumbo squid (Dosidicus gigas) fin and mantle muscle on dough properties and bread baking performance of commercial wheat flour Efecto de aleta y músculo de manto de calamar gigante (Dosidicus gigas) liofilizado sobre las propiedades de la masa y la calidad panadera de una harina de trigo comercial  

Microsoft Academic Search

The effect of 25 and 50 g\\/kg of lyophilized jumbo squid (Dosidicus gigas) fin (JSF) and mantle muscle (JSM) on dough properties and baking performance of wheat flour were studied. Dough maximum resistance (Rmax), extensibility, deformation work (Area, 45-min resting time), baking performance, loaf volume, and acceptability were evaluated. JSF (25 g\\/kg) almost tripled (P ? 0.05) Rmax compared to

J. C. Ramirez-Suarez; A. R. Islas-Rubio; L. C. Montoya-Ballesteros; M. C. Granados-Nevarez; F. Vázquez-Lara; R. Pacheco-Aguilar; M. E. Lugo-Sánchez



(VERSIÓN EN ESPAÑOL ABAJO) FIGHTING AN AGGRESSIVE WETLANDS INVADER: A CASE STUDY OF GIANT REED (ARUNDO DONAX) AND ITS THREAT TO CUATRO CIÉNEGAS, COAHUILA, MÉXICO Luchando contra una especie ribereña, invasora y agresiva: un estudio de caso de Carrizo Grande (Arundo donax) y la amenaza que representa para Cuatro Ciénegas, Coahuila, México  

Microsoft Academic Search

Recently, a number of wetlands and rivers in Cuatro Ciénegas, Coahuila, México have become infested with an alien invasive weed, Arundo donax (L)(giant reed). Arundo threatens the viability of aquatic ecosystems in this unique federally designated Protected Area for Flora and Fauna by effectively draining the water to support its own rapid growth, altering hydrologic and nutrient cycling regimes, shading



Processo de enfermagem informatizado em unidade de terapia intensiva: uma prática educativa com enfermeiros Computerized nursing process in intensive therapy unit: an educative practice with the nurses Proceso de enfermería informatizado en unidad de terapia intensiva: una práctica educativa con enfermeros  

Microsoft Academic Search

RESUMO Compreendendo-se que o processo de enfermagem é uma ferramenta imprescindível em Unidades de Terapia Intensiva (UTI), esta pesquisa convergente-assistencial objetivou avaliar a aplicação do Processo de Enfermagem informatizado, a partir da Classificação Internacional das Práticas de Enfermagem - CIPE® versão 1.0, com os enfermeiros da UTI do Hospital Universitário da Universidade Federal de Santa Catarina. Como estratégia de coleta

Daniela Couto; Carvalho BarraI; Grace Teresinha; Marcon Dal



Microsoft Academic Search

This is a qualitative study, using a socio-historical approach. Its objective is to place into a historical perspective the trajectory of the Nursing Graduate Program at the Federal University of Santa Catarina, Brazil, from the historical perspective of its coordinators. In order to so, structured interviews were carried out with six of the coordinators who served in the Program. The

Souza Padilha; Miriam Süsskind Borenstein; Ana Rosete Maia; Jenifer Adriana Domingues; Padilha MICS; Maia AR; Guedes JAD; Lessmann JC; Machado CA


Lo que el Aprendizaje para la Creatividad Exige a la Gestión Institucional en Centros Educativos: Aprendizajes Derivados de una Línea de Investigación 1 Demands From Required Conditions for Creative Development Over Institutional Management of Schools: Observed Characteristics That Emerge From more Than a Decade of Investigations  

Microsoft Academic Search

Creativity appears to be a human potential, but has specific requirements for its development and open expression. In fact, there are contexts that promote creativity and others that don't; these are contexts in which this ability is repressed, punished or ignored as an educational resource. This can be appreciate when people who don't consider themselves as creative persons are asked

Ma. Isidora Men; Ruby Vizcarra



The Challenge of the Other: Towards dialogical person-centered psychotherapy and counseling \\/ Die Herausforderung durch den Anderen: Auf dem Weg zu einer dialogischen Personzentrierten Psychotherapie und Beratung \\/ El desafío del Otro: Hacia una psicoterapia dialógica centrada en la persona \\/ Le défi de l'Autre: Vers une approche dialogique de la psychothérapie et du counselling centrés sur la personne  

Microsoft Academic Search

How can we understand an other person? If we try to understand the other person from one's own perspective we finally end up at something we know already (this is termed “epistemology of the same”). The opposite way is to be receptive to what the other shows and wants to be understood (constituting a Thou?I relationship and an “epistemology of

Peter F. Schmid



Minority Languages of the Russian Federation: Perspectives for a Ratification of the European Charter of Regional and Minority Languages. Mercator Working Papers = Las lenguas minoritarias de la Federacion Rusa Perspectivas para una ratificacion de la Carta Europea de las Lenguas Regionales y Minoritarias. Mercator Documentos de trabajo.  

ERIC Educational Resources Information Center

This paper describes the linguistic plurality of the Russian Federation, assessing the impact that the hypothetical ratification of the European Charter of Regional and Minority Languages could have on it. Four sections focus on the following: (1) "Introduction"; (2) "Part 1--The Linguistic Plurality of the Russian Federation": the linguistic…

Vieytez, Eduardo J. Ruiz


Revolucionarios Silenciosos: Una Resena de la Campana Contra el Hambre que Llevan a Cabo los Cientificos Agricolas (y de Como Pudo Ayudar un Cultivo Desdenado: la Mandioca) (Quiet Revolutionaries: A Look at the Campaign by Agricultural Scientists to Fight Hunger and How the Much Neglected Cassava Could Help).  

National Technical Information Service (NTIS)

Over the next 30 years, yields of the major food crops must double to keep pace with global population growth. The essay tells two related stories about the fight against hunger. It looks at how agricultural researchers worldwide help feed a hungry world....

D. Wigg



Maintaining the competitiveness of the American fisheries society journals: An assessment based on influence and cost-effectiveness [Mantenimiento de la competitividad de las revistas de la Sociedad Americana de Pesquer??as: Una evaluaci??n basada en la influencia y efectividad de costos  

USGS Publications Warehouse

Recent changes in the landscape of scientific publishing prompted the Publications Overview Committee of the American Fisheries Society (AFS) to review the Society's portfolio of scientific journals. We evaluated journals based on metrics in two categories: (1) citation-based measures of the influence of a journal on the scientific literature, and (2) measures of the cost-effectiveness of a journal (citation rate adjusted for subscription cost). Over the long-term, we found that ecology journals had far stronger citation-based influence than fisheries and aquatic sciences journals, and that journals publishing primarily basic research had stronger influence than journals publishing applied research (including four AFS journals and Fisheries magazine). In evaluating the current status of fisheries and aquatic sciences journals, we found that metrics of influence and cost-effectiveness provided considerably different portrayals of journals relative to their peers. In terms of citation-based influence, we found that the AFS journal Transactions of the American Fisheries Society (TAFS) and Fisheries magazine were competitive with highly regarded peer fisheries journals, but that North American Journal of Aquaculture (NAJA) and Journal of Aquatic Animal Health (JAAH) were less influential than their peers. The citation-based influence of North American Journal of Fisheries Management (NAJFM) was intermediate between TAFS/Fisheries and NAJA/JAAH. For journals like NAJFM and NAJA, we expect that much of the scientific influence on policy and management is not captured by citations in the primary literature, and alternative methods of evaluation may be needed. All of the AFS journals ranked highly with regard to cost-effectiveness because their subscription costs are low, and these rankings are in accordance with membership needs and the strategic mission of AFS to provide broad and timely dissemination of scientific information. We conclude by suggesting ways to increase the influence of AFS journals without compromising their accessibility and affordability, and offer advice about methods and frequency for future journal evaluations. ?? 2009.

Hewitt, D. A.; Link, J. S.; Wahl, D. H.; Cooke, S. J.; Mather, M. E.



Identificación del antígeno del virus de la fiebre porcina clásica en excretas porcinas sólidas y líquidas en una granja del estado de Guanajuato, México Identification of Classical Swine Fever virus antigen in solid and liquid swine faeces from a Guanajuato State farm, Mexico  

Microsoft Academic Search

The purpose of this study was the detection of Classical Swine Fever virus (CSFv) in organic waste matter. A total of 40 samples from collection basin sludge, solid faeces and separated liquid phases from eight farms with faeces treatment systems based on a liquid and solids separation process in Central Mexico, were evaluated. All the samples were tested by direct

Roberto Martínez-Gambaa


Informe a la nación indica que continúa la disminución de las tasas de mortalidad por cáncer que empezó a principios de los noventa; Una sección especial destaca los cánceres asociados al exceso de peso y a la falta de actividad física adecuada

Los índices de mortalidad por todos los cánceres combinados para hombres, mujeres y niños siguieron bajando en Estados Unidos entre 2004 y 2008, según el Informe Anual a la Nación sobre el Estado del Cáncer de 1975 a 2008. El índice general de diagnósticos nuevos de cáncer, que se conoce también como incidencia, bajaron entre los hombres un promedio de 0,6% por año entre 2004 y 2008. Los índices generales de incidencia de cáncer entre las mujeres bajaron 0,5% por año de 1998 hasta 2006; estos índices se nivelaron de 2006 a 2008.



Microsoft Academic Search

This focused ethnography explored the beliefs, values, habits and behavioral patterns of diabetic pregnant women who were treated in Hospital Doutor Enrique Tejera, residents of three poor, urban communities in the city of Valencia, Venezuela. The purpose of this study was to find the meaning of self-care for these pregnant women. The Health Analysis, the Theory of Diversity, and the

Carmen Amarilis; Guerra de Castillo; Marta Lucía Vásquez



A Guide for Parents and Families about What Your 12th Grader Should Be Learning in School This Year. Don't Fail Your Children = Una Guia para los Padres y Familias Acerca de Lo Que Su Hijo de Grado 12 Debe Aprender en la Escuela Este Ano. No Le Falle a Sus Hijos.  

ERIC Educational Resources Information Center

This guide, in English- and Spanish-language versions, shares with parents information about the South Carolina Curriculum Standards. The standards outline state requirements for children's learning and what students across the state should be able to do in certain subjects. The guide lists seven key reasons parents should be aware of the new…

South Carolina State Education Oversight Committee, Columbia.



Microsoft Academic Search

This is a qualitative study whose objective is to reflect upon the everyday life of women who are bearers of psychic disturbances by identifying the meanings of their existences and co-building increased opportunities for them to become citizens. The study was developed with residents of a Therapeutic Residence, linked to the Instituto de Psiquiatria de Santa Catarina, in São José\\/SC.

Valdete Preve Pereira; Miriam Süsskind Borenstein



Un Modelo de Fortificacion del Maiz con Harina de Soya, Lisina y Otros Nutrimentos, en una Comunidad Rural de Bajo Nivel Socioeconomico (From the Study: A Model for Corn Fortification with Soy Bean Flour, Lysine and Other Nutrients in a Low Socioeconomic Rural Community).  

National Technical Information Service (NTIS)

A long term prospective study in a highland community where corn provides 70% of proteins and calories, revealed that: (a) 40% of babies have low birth weight; (b) most infants exhibit physical growth retardation; (c) infant mortiality is very high; and (...

L. Mata



Multiplicity: A First-Person Exploration of Dissociative Experiencing \\/ Multiplizität: Eine Exploration in der 1. Person zu dissoziativem Erleben \\/ Multiplicidad: Una exploración en primera persona del experiencing disociativo \\/ Multiplicité: Une Exploration d'experiencing dissociatif à partir l'expérience de personnes connaissant personnellement ces états \\/ Multiplicidade: Experiência na primeira pessoa de uma vivência dissociativa  

Microsoft Academic Search

Findings from a multi-year experiential-phenomenological research project investigating the lived experience of dissociation are presented. The project is grounded in the first-person approach to human science research. It uses an analytic method called the Immediacy Model for Qualitative-Phenomenological Research developed by the author, which is based upon Gendlin's philosophical and psychological works (Gendlin, 1962, 1973, 1997; Gendlin & Johnson, 2004).

Kevin C. Krycka



A Theory of Demand for Products Distinguished by Place of Production (Une théorie de la demande de produits différenciés d'après leur origine) (Una teoría de la demanda de productos distinguiéndolos según el lugar de producción)  

Microsoft Academic Search

Cette étude offre un appui théorique à certaines pratiques de recherche selon lesquelles la variation d'un flux commercial particulier entre pays est considérée comme la résultante de deux éléments: la modification qui se produirait si le pays fournisseur donné devait conserver sa part du marché, et l'écart entre les ventes effectives et celles qui s'effectueraient si sa part du marché

Paul S. Armington



On the Possibility of Developing a Simple Solar Probe Stabilized by Radiation Pressure. Principal Characteristics, Project Criteria, Study of Motion and Stability Sulla Possibilita di Realizzare Una Sonda Solare Semplice Stabilizzata Mediante la Pressione d'Irraggiamento. Caratteristiche Principali, Criteri di Progettazione, Studio Del Moto E Della Stabilizzazione.  

National Technical Information Service (NTIS)

A proposal for a cone shaped solar probe is made in which the thermal equilibrium, the production of the energy for instrumentation requirements, and the attitude stability may be obtained in a natural way by properly assigning geometrical dimensions, mas...

M. Sirinian



Effetto dell'inquinamento atmosferico sulla vegetazione forestale: Verifica dell'applicabilita' di un nuovo metodo per studiare influenza delle emissioni di una centrale termoelettrica sulle faggete di Vado Ligure e Quiliano. (Air pollution effects on forest vegetation: Effects of Vado Ligure (Italy) power plant on soil acidification (evaluation method validation)).  

National Technical Information Service (NTIS)

The purpose of this work was to verify possible soil acidification due to atmospheric pollution caused by the emission of a thermoelectric power plant (coal and fuel oil fired) at Vado Ligure (Savona, Liguria) with a method used in many European stations ...

L. Naviglio M. Angelone A. R. Velletti




NSF Publications Database

... para la Investigacion del Cambio Global (IAI) es una organizacion internacional concebida como una ... bajo el ISP seran desarrolladas en consulta con el Comite Asesor Cientifico (SAC), el Director, y el ...


Fatiga (PDQ®)

Resumen de información revisada por expertos acerca de la fatiga, una afección caracterizada por extremo cansancio e incapacidad para funcionar por la falta de energía, que a menudo se observa como una complicación del cáncer y su tratamiento.


Overactive Thyroid: What You Need to Know  


... medicinas que contienen yodo, como la amiodarona, una medicina para el corazón • tiene fi brilación auricular, un ... que lo trate. Su médico puede prescribirle una medicina llamada betabloqueador que le ayudará a sentirse mejor ...


Dona de 90 anys amb dolor toràcic pleurític  

Microsoft Academic Search

El signe de Chilaiditi és una alteració anatòmica que consisteix en la interposició d’una part de colon generalment el dret entre fetge i diafragma. No és un quadre freqüent i predomina sobretot em homes majors de 65 anys.

Inmaculada Burgos Remacha; Julio Navaz Tejero; Juan Fernando Fernandez Moyano



Mujer de 90 años con dolor torácico pleurítico  

Microsoft Academic Search

El signo de Chilaiditi es una alteración anatómica que consiste en la interposición de una parte de colon generalmente el derecho entre hígado y diafragma. No es un cuadro frecuente y predomina sobre todo en varones mayores de 65 años.

Inmaculada Burgos Remacha; Julio Navaz Tejero; Juan Fernando Fernandez Moyano



Boletín del Instituto Nacional del Cáncer - 28 de febrero de 2012

Los artículos originales en inglés están disponibles en las páginas del NCI Cancer Bulletin. El Boletín es una publicación del Instituto Nacional del Cáncer (NCI), una entidad gubernamental de los Estados Unidos creada en 1937.


Metastasi spinali estrinseche ed intrinseche  

Microsoft Academic Search

Una compressione neoplastica midollare epidurale (CME) è una complicanza legata ad una neoplasia che nel suo sviluppo ha invaso\\u000a lo spazio epidurale comprimendo il sacco durale e quindi il midollo. Il 90% circa delle compressioni epidurali origina da\\u000a una metastasi ossea a partenza dal corpo vertebrale [1]. L’incidenza delle CME nei malati tumorali è compresa tra il 4,4 e il

Antonio Silvani


Dermatite atopica: patologie digestive  

Microsoft Academic Search

La dermatite atopica (DA) è una malattia “sulla” pelle ma non è solo una malattia “ della” pelle. Il presente capitolo si\\u000a occuperà di tutti gli aspetti mucosi ed intestinali della malattia, che derivano dal fatto che - in una parte non trascurabile\\u000a di casi - la DA ha una componente eziopatogenetica di allergia alimentare. Ci occuperemo pertanto dapprima dei

Alessandro Fiocchi; Maurizio Corvo; Luigi Terracciano; Teresita Sarratud; Adina Frasin; Alberto Martelli


Obesidad y esteatohepatitis no alcohólica: su interrelación y estudio  

Microsoft Academic Search

La esteatohepatitis no alcohólica es una enti- dad caracterizada por cambios histológicos en el hígado debido al depósito de grasa, no aso- ciado al consumo de alcohol. En su evolución es una patología que puede progresar a cirrosis, por lo que es necesario establecer una terapéu- tica adecuada. Hasta el momento, los mayores beneficios se han obtenido a través del

Alfonso Soto González; Ana Prada Vigil; Manuel Delgado Blanco; Manuela Buño Soto; Diego Bellido Guerrero


Disertación sobre justicia y equidad  

Microsoft Academic Search

«Disertación sobre equidad y justicia» es básicamente una respuesta a una inquietud en particular que yo tenía sobre las distintas posiciones que existen sobre estos dos temas y cómo definir cuál es la más acertada. Hice una descripción del punto de vista de Amartya Sen -la violación de los derechos sobre la propiedad privada es justificable si evitan las hambrunas-

Sayuri P. Tamura



Aplicación del cálculo de las diferencias al problema del efecto de embalse  

Microsoft Academic Search

Resumen Presentamos una solución numérica del problema del efecto de embalse con ayuda de una ecuación lineal inhomogénea en diferencias finitas de primer orden, suponiendo una ley lineal del desagüe. Este método numérico es de maneje cómodo para un cálculo aproximado.

Hans Ertel



Planificación urbana versus autoregulación: la ciudad de Fortaleza (Brasil) como tablero de juego de diferentes agentes  

Microsoft Academic Search

Fortaleza es una ciudad relativamente jóven en cuanto a su importancia como metrópoli regional, caracterizándose sobre todo en las últimas décadas por una muy fuerte dinámica demográfica, económica y política. En este contexto el espacio urbano se ha convertido en una mercancía de alto costo, disputada entre los intereses contradictorios de compañías influentes, especuladores inmobiliarios, políticos y el resto de

Waltraud Rosner; Ulli Vilsmaier



La estrategia de los EE.UU. atenta contra la Humanidad y amenaza al planeta  

Microsoft Academic Search

Es imprescindible analizar y comprender el proceso que llevó a los EE.UU. a erigirse en una potencia imperialista como nunca antes conoció la Humanidad. Asimismo comprender la conversión de una sociedad que privilegiaba sobre todo la Democracia y la participación en las decisiones en los distintos niveles de gestión ciudadana, en una población que privilegia el consumo, la riqueza y

Jacob Goransky


Merging Cognition and Affect in HCI (Guest Editor's Introduction)  

Microsoft Academic Search

E' importante considerare gli aspetti affettivi del ragionamento umano, nella costruzione di agenti intelligenti? O il crescente numero di iniziative in questo campo non è altro che una moda, destinata ad essere superata in favore di altri slogan? Noi crediamo che una moda non sia, ma che si tratti di una esigenza reale. L'accettabilità di un sistema è sempre più

Fiorella de Rosis


Les composantes de l'hérédité sociale : un capital économique et culturel à transmettre  

Microsoft Academic Search

[spa] Los componentes de la herencia social : transmision de un capital económico y de un capital cultural - Según Pierre Bourdieu, el nivel social, en una primera aproximación, es la resultante de una combinación entre un capital económico y un capital cultural. Si la mayoria de los hombres ocupan una posición social semejante a la de los padres, tal

Michel Gollac; Pierre Laulhé




Microsoft Academic Search

Este trabajo resume, por un lado los aportes centrales de una investigación más amplia denominada Políticas Públicas y Formación pa ra el Trabajo en Argentina. Articulaciones de una Política Neoliberal2 , cuyo eje fue e l análisis, desde una perspectiva c rítica, de un Programa focalizado e implementado a escala nacional en la República Argentina - el Proyecto Joven -

Esther Levy



Microsoft Academic Search

Una cellula cardiaca presenta una differenza di potenziale di membrana tra l'interno elettronegativo e l'esterno positivo. Esiste un potenziale transmembrana che, tuttavia, nel corso del ciclo cardiaco subisce una modificazione, nel senso che alcuni sistemi di pompa degli ioni (sodio, potassio, calcio e cloro) consentono la migrazione degli stessi e, di conseguenza, causano un cambiamento nella polarizzazione di membrana. In

A. Calisto; B. Azzerboni; G. Consolo; G. Finocchio; V. Puliafito; A. Romeo


Boundedness, continuity, positivity and dominance of the solution of the neutron boltzmann equation  

Microsoft Academic Search

Sommario In questo lavoro viene esaminato il comportamento della soluzione della forma integrale dell'equazione di Boltzmann del trasporto dei neutroni nel caso di una lastra piana e di una sfera. Lo studio delle proprietà dell'operatore integrale del trasporto K porta ad interessanti risultati riguardanti i seguenti argomenti: limitatezza, continuità e positività del flusso totale; esistenza di una autofunzione dominante critica;

Francesco Premuda



Desequilibrios regionales en la política de descentralización en Colombia  

Microsoft Academic Search

El propósito principal de este documento es presentar una serie de recomendaciones de política que permitan consolidar a la descentralización como una estrategia de desarrollo regional. La evidencia muestra que la descentralización ha perpetuado las disparidades que en materia de cobertura en educación y salud existen en Colombia. Se encuentra, además, una gran desigualdad en los ingresos fiscales per cápita

Jaime Bonet



La Problemática Del Descuento En La Evaluación Económica De Proyectos Con Impacto Intergeneracional: Tasa Ambiental Crítica Y Montante De Transferencia Intergeneracional\\/Discounting In The Context Of Intergenerational Projects’ Appraisal: Environmental Discount Rate And Intergenerational Transfer Amount  

Microsoft Academic Search

La primera parte de este trabajo presenta una revisión teórica de las principales posturas que subyacen a la controversia sobre el descuento en la evaluación mediante análisis coste-benefi cio de proyectos de amplio horizonte temporal. A continuación se expone una propuesta metodológica novedosa centrada en la utilización de una tasa de descuento diferente para benefi cios y costes que tienen





Microsoft Academic Search

Entre los problemas medioambientales actuales, la reducción o eliminación de los residuos se ha convertido en una de las principales preocupaciones en los países industrializados y en una prioridad para las empresas. En el presente trabajo se realiza una revisión de los postulados del modelo económico clásico, vigente hasta hace escasas fechas, en relación con la variable medio ambiente y

Unai Tamayo Orbegozo; María Azucena Vicente Molina; Julen Izaguirre Olaizola



High-resolution vegetation dynamics reconstitution in the Zaire/Congo watershed since MIS 6  

NASA Astrophysics Data System (ADS)

The present-day latitudinal migrations of the Intertropical Convergence Zone (ITCZ) are controlled by ocean/atmosphere dynamics impact seasonality of monsoon influence on the intertropical eastern Atlantic and western Africa. The geographical position of the Zaire/Congo drainage basin spanning the Northern and Southern hemispheres makes it a key area to study variation of the climatic parameters (temperature and monsoon activity) through time. To identify the ITCZ variability during the last 180 ka, a multiproxy analysis (pollen grains, elemental ratio derived from XRF analysis, organic matter content, clay mineralogy) was performed on the core KZAI-02, drilled offshore Angola at 3418 m water depth. Pollen record indicates a very high plant diversity (327 taxa representative of 106 families). They have been grouped as follow with respect to their ecological requirements: (1) mangrove, (2) rain forest, (3) warm-temperate forest, (4) pioneer forest, (5) afromontane forest, (6) savannah, (7) marshes. The relative fluctuation of these ecological groups during the last 180 ka allows us to reconstruct the dynamics of vegetation and its response to global climate forcing. Generally the glacial periods are characterized by the development of the afromontane forest (mainly Podocarpus) on reliefs while in lower altitudes the savannah (Fabaceae Papilionoidae, Poaceae, Zygophyllum, etc.) spreads in response to the relative precipitation decrease. During interglacials our records indicate a progressive development of forest environments, the pioneer forest (Alchornea, Bridelia, Cnestis, etc.) being progressively replaced by the tropical rain forest (Acanthaceae, Fabaceae Caesalpinoideae, Sapotaceae, etc.). This evolution indicates an increase in temperature and humidity. At the stadial/interglacial transitions the development of the mangrove (Rhizophoraceae, Avicenia, Sonneratia, etc.) seems to respond principally to sea level rise. The maximum extension of Cyperaceae marshes contemporaneously with a significant presence of afromontane forest in MIS 6 may be correlated with rainfall increase probably related to changes in the monsoon activity. The information in term of humidity obtained from some other proxies (clay mineralogy, organic carbon, and elemental ratio measured by XRF, such as Br, etc.) shows a similar trend with the pollen record. A spectral analysis has been performed and reveals that the reconstructed climatic parameters from the Zaire/Congo watershed correlated with Milankovitch cycles, including semi-precession cycles (10 kyrs) characteristic of the Equatorial zone.

Dalibard, Mathieu; Popescu, Speranta-Maria; Maley, Jean; Pittet, Bernard; Marsset, Tania; Baudin, François; Dennielou, Bernard; Sionneau, Thomas; Escarguel, Gilles; Droz, Laurence



Pharmacokinetics and in-situ absorption studies of a new anti-allergic compound 73/602 in rats.  


Compound 73/602 (AA) is a structural analogue of vasicinone, an alkaloid present in the leaves and roots of Adhatoda vasica (Acanthaceae). It possesses potent antiallergic activity in mice, rats and guinea pigs. The pK(a) of AA was determined to be 2.87+/-0. 19 by UV spectrophotometry. The absorption kinetics of this compound were studied in-situ using a rat gut technique at pH 2.6 and 7.4. The rate of absorption at pH 2.6 (0.0288+/-0.004 min(-1)) was slightly less than at pH 7.4 (0.035+/-0.0008 min(-1)). This characteristic behavior was attributed to the low pK(a) of AA, a weekly basic compound, where nearly 35% of the compound remained in the unionized form at pH 2.6. Also, the return of compound into the mucosal lumen from the blood capillaries over a period of 2 h after administering a 2 mg dose in tail vein was less than 0.3%. Hence it was concluded that entero-enteric circulation of AA did not contribute significantly to the in-situ absorption rates. Pharmacokinetic parameters of AA were determined in male rats after administering a single 10 mg/kg intravenous dose (i.v.) and 50 mg/kg oral bolus dose. Following i.v. administration the initial decline in serum concentration was rapid with half-life of 20.2 min. After a single oral dose the concentration-time data of AA in rats was best described by a one-compartment model with equal first order absorption and apparent elimination rate constants. The half-life of the decline in serum concentration of AA following oral administration was 50.6 min, indicating absorption rate limiting disposition at the high dose given. Comparison of AUC of oral and i. v. data indicates that only about 60% of the oral dose reach the systemic circulation. PMID:10704808

Paliwa, J K; Dwivedi, A K; Singh, S; Gutpa, R C



LINEs mobilize SINEs in the eel through a shared 3' sequence.  


We characterized members of the LINE (UnaL2) and SINE (UnaSINE1) families from the eel genome and found that these LINE/SINE partners share similar 3' tails. A retrotransposition assay in HeLa cells demonstrated that the 3' conserved tail of UnaL2 is necessary for its retrotransposition. This 3' tail is recognized in trans by the UnaL2 reverse transcriptase at a surprisingly high rate, and that of UnaSINE1 can also be recognized, thus providing experimental evidence that a SINE can be mobilized by the retrotransposition machinery of a partner LINE. We also demonstrated that short repeats at the 3' end of UnaL2 are required for retrotransposition suggesting that UnaL2 retrotransposes in a manner reminiscent of the reverse transcriptase activity of telomerases. PMID:12419252

Kajikawa, Masaki; Okada, Norihiro



Thermodynamics of RNA duplexes modified with unlocked nucleic acid nucleotides  

PubMed Central

Thermodynamics provides insights into the influence of modified nucleotide residues on stability of nucleic acids and is crucial for designing duplexes with given properties. In this article, we introduce detailed thermodynamic analysis of RNA duplexes modified with unlocked nucleic acid (UNA) nucleotide residues. We investigate UNA single substitutions as well as model mismatch and dangling end effects. UNA residues placed in a central position makes RNA duplex structure less favourable by 4.0–6.6?kcal/mol. Slight destabilization, by ?0.5–1.5?kcal/mol, is observed for 5?- or 3?-terminal UNA residues. Furthermore, thermodynamic effects caused by UNA residues are extremely additive with ?G°37 conformity up to 98%. Direct mismatches involving UNA residues decrease the thermodynamic stability less than unmodified mismatches in RNA duplexes. Additionally, the presence of UNA residues adjacent to unpaired RNA residues reduces mismatch discrimination. Thermodynamic analysis of UNA 5?- and 3?-dangling ends revealed that stacking interactions of UNA residues are always less favourable than that of RNA residues. Finally, circular dichroism spectra imply no changes in overall A-form structure of UNA–RNA/RNA duplexes relative to the unmodified RNA duplexes.

Pasternak, Anna; Wengel, Jesper




Responda cada pregunta lo mejor que pueda. Si no está seguro de alguna repuesta, proporcione una aproximación o cálculo. Adivinar es mejor que no contestar nada. Use exclusivamente un lapicero de tinta negra. No use lápiz ni rotulador. Marque una X en la caja al lado de su respuesta. Si hace algún cambio, tache la respuesta incorrecta y ponga una X en la caja al lado de la respuesta correcta. Además, marque un círculo alrededor de la respuesta correcta.


Boletín del Instituto Nacional del Cáncer - 05-25-2010

Aproximadamente 41.000 participantes en un estudio en el Reino Unido se sometieron una sola vez a una examen de detección en la parte inferior del colon mediante el uso de un sigmoidoscopio, un instrumento delgado en forma de tubo que se inserta a través del recto para buscar lesiones precancerosas o cancerosas. Este dispositivo también tiene una herramienta para extraer pólipos potencialmente precancerosos.



NSDL National Science Digital Library

Jugando a este juego, los chicos desarrollan habilidades de lógica, geometría, y visualización espacial. Los jugadores empiezan con una red de hexágonos vacía. Los jugadores toman turnos para poner sus iniciales en hexágonos para construir una âparedâ de hexágonos que el otro jugador no puede cruzar. El primer jugador que consiga bloquear en una esquina al otro gana. Incluye una variante más difícil. Disponible para descargar en formato pdf en Inglés.




Acerca de la Investigación del Cáncer en América Latina

Avanzar en las iniciativas locales y globales para prevenir, diagnosticar y tratar el cáncer al facilitar el desarrollo de una infraestructura para la investigación oncológica integral en Latinoamérica.


Scienza dei servizi  

NASA Astrophysics Data System (ADS)

I servizi sono oramai centrali nella vita sociale di ogni Paese. L'aspettativa di ogni attore sociale, sia esso cittadino/utente e/o istituzione, è quella di ricevere da uno scambio che ha alla base un servizio un contributo che si caratterizza per una qualità intrinseca. Il mantenimento di tale promessa richiede all'azienda erogatrice un forte coinvolgimento, nel disegno del servizio, degli utenti ed una capacità di gestione della conoscenza; ciò è particolarmente significativo per quei servizi che si caratterizzano per una forte personalizzazione o complessità progettuale. Disegnare un servizio, metterlo in produzione e gestirne l'erogazione ha una complessità variabile in base al grado di coinvolgimento dei destinati ed alle dimensioni critiche che esprimono le condizioni di fattibilità di un servizio di qualità appropriato alle attese degli utilizzatori. Ugualmente la globalizzazione dell'economia e la scarsità delle risorse ha portato l'attenzione, ai fini della sostenibilità delle condizioni sopra richiamate, di una ricerca di modelli e strumenti che permettano una valutazione e una standardizzazione dei processi di produzione ed erogazione secondo condizioni di economicità. Tali primi e sintetici elementi hanno condotto diversi attori istituzionali, grandi imprese ed università attraverso i loro centri di ricerca, ad una azione di riflessione sul grado di "ingegnerizzazione" dei processi sottesi alla erogazione dei servizi ed in particolare ai servizi che attuano le politiche dei grandi settori di base dell'economia di una Nazione: educazione, sanità, sociale, sviluppo infrastrutture ecc.

Cavenago, Dario; Mezzanzanica, Mario


Manejo de las areas verdes urbanas  

Microsoft Academic Search

El presente documento (ENV-109) busca dar al lector una base sólida sobre los beneficios, retos y enfoque para el desarrollo de programas sostenibles de manejo de áreas verdes urbanas. El objetivo es abarcar los elementos más importantes que deben ser considerados a la hora de iniciar los proyectos. Se incluye una variedad de estudios de casos de toda América Latina

Mark Sorensen; Valerie Barzetti; Kari Keipi; John R. Williams



El Efecto Silenciador de la Libertad de Expresión  

Microsoft Academic Search

La Iibertad de expresion ha sido siempre una cuesrion de gran interes para los juristas escadounidenses. No es una excepcion que ahora tambien lo sea. Aunque los asuntos han cambiado-de la amenaza comunisca y fa subversion a la pornografia, el discurso de odio (etnico, sexisca, etcetera) y los financiamientos de campana-las divisiones y pasiones que estos provocan, son parecidas a

Owen M Fiss