Sample records for zones connecting chemistry

  1. The Formation of Uranus and Neptune in Solid-Rich Feeding Zones: Connecting Chemistry and Dynamics

    NASA Astrophysics Data System (ADS)

    Robinson, Sarah E.; Bodenheimer, P.

    2010-10-01

    The core accretion theory of planet formation has at least two fundamental problems explaining the origins of Uranus and Neptune: (1) dynamical times in the trans-saturnian solar nebula are so long that core growth can take >15 Myr and (2) the onset of runaway gas accretion that begins when cores reach 10 Earth masses necessitates a sudden gas accretion cutoff just as Uranus and Neptune's cores reach critical mass. Both problems may be resolved by allowing the ice giants to migrate outward after their formation in solid-rich feeding zones with planetesimal surface densities well above the minimum-mass solar nebula. We present new simulations of the formation of Uranus and Neptune in the solid-rich disk of Dodson-Robinson et al. (2009) using the initial semimajor axis distribution of the Nice model, with one ice giant forming at 12 AU and the other at 15 AU. The innermost ice giant reaches its present mass after 3.8-4.0 Myr and the outermost after 5.3-6 Myr, a considerable time decrease from previous one-dimensional simulations (e.g. Pollack et al. 1996). The core masses stay subcritical, eliminating the need for a sudden gas accretion cutoff. Our calculated carbon mass fractions of 22% are in excellent agreement with the ice giant interior models of Podolak et al. (1995). Based on the requirement that the ice giant-forming planetesimals contain >10% mass fractions of methane ice, we can reject any Solar System formation model that initially places Uranus and Neptune inside of Saturn's orbit. We also demonstrate that a large population of planetesimals must be present in both ice giant feeding zones throughout the lifetime of the gaseous nebula. This research marks a substantial step forward in connecting both the dynamical and chemical aspects of planet formation.

  2. The formation of Uranus and Neptune in solid-rich feeding zones: Connecting chemistry and dynamics

    NASA Astrophysics Data System (ADS)

    Dodson-Robinson, Sarah E.; Bodenheimer, Peter

    2010-05-01

    The core accretion theory of planet formation has at least two fundamental problems explaining the origins of Uranus and Neptune: (1) dynamical times in the trans-saturnian solar nebula are so long that core growth can take >15 Myr and (2) the onset of runaway gas accretion that begins when cores reach ˜10 M? necessitates a sudden gas accretion cutoff just as Uranus and Neptune's cores reach critical mass. Both problems may be resolved by allowing the ice giants to migrate outward after their formation in solid-rich feeding zones with planetesimal surface densities well above the minimum-mass solar nebula. We present new simulations of the formation of Uranus and Neptune in the solid-rich disk of Dodson-Robinson et al. (Dodson-Robinson, S.E., Willacy, K., Bodenheimer, P., Turner, N.J., Beichman, C.A. [2009]. Icarus 200, 672-693) using the initial semimajor axis distribution of the Nice model (Gomes, R., Levison, H.F., Tsiganis, K., Morbidelli, A. [2005]. Nature 435, 466-469; Morbidelli, A., Levison, H.F., Tsiganis, K., Gomes, R. [2005]. Nature 435, 462-465; Tsiganis, K., Gomes, R., Morbidelli, A., Levison, H.F. [2005]. Nature 435, 459-461), with one ice giant forming at 12 AU and the other at 15 AU. The innermost ice giant reaches its present mass after 3.8-4.0 Myr and the outermost after 5.3-6 Myr, a considerable time decrease from previous one-dimensional simulations (e.g. Pollack, J.B., Hubickyj, O., Bodenheimer, P., Lissauer, J.J., Podolak, M., Greenzweig, Y. [1996]. Icarus 124, 62-85). The core masses stay subcritical, eliminating the need for a sudden gas accretion cutoff. Our calculated carbon mass fractions of 22% are in excellent agreement with the ice giant interior models of Podolak et al. (Podolak, M., Weizman, A., Marley, M. [1995]. Planet. Space Sci. 43, 1517-1522) and Marley et al. (Marley, M.S., Gómez, P., Podolak, M. [1995]. J. Geophys. Res. 100, 23349-23354). Based on the requirement that the ice giant-forming planetesimals contain >10% mass fractions of methane ice, we can reject any Solar System formation model that initially places Uranus and Neptune inside of Saturn's orbit. We also demonstrate that a large population of planetesimals must be present in both ice giant feeding zones throughout the lifetime of the gaseous nebula. This research marks a substantial step forward in connecting both the dynamical and chemical aspects of planet formation. Although we cannot say that the solid-rich solar nebula model of Dodson-Robinson et al. (Dodson-Robinson, S.E., Willacy, K., Bodenheimer, P., Turner, N.J., Beichman, C.A. [2009]. Icarus 200, 672-693) gives exactly the appropriate initial conditions for planet formation, rigorous chemical and dynamical tests have at least revealed it to be a viable model of the early Solar System.

  3. CHEMISTRY CONNECTION Northwestern University Department of Chemistry

    E-print Network

    Grzybowski, Bartosz A.

    CHEMISTRY CONNECTION Northwestern University Department of Chemistry In this Issue Faculty News 2. The team, representing four departments and schools at Northwestern (Chemistry, Kellogg/ Business, Law is stored in motor vehicle gas tanks. Omar Farha, Chemistry Research Associate Professor, along with Chris

  4. Korean Kimchi Chemistry: A Multicultural Chemistry Connection

    ERIC Educational Resources Information Center

    Murfin, Brian

    2009-01-01

    Connecting science with different cultures is one way to interest students in science, to relate science to their lives, and at the same time to broaden their horizons in a variety of ways. In the lesson described here, students make kimchi, a delicious and popular Korean dish that can be used to explore many important chemistry concepts,…

  5. Connected Chemistry—Incorporating Interactive Simulations into the Chemistry Classroom

    Microsoft Academic Search

    Mike Stieff; Uri Wilensky

    2003-01-01

    The aim of this paper is to describe a novel modeling and simulation package, connected chemistry, and assess its impact on students' understanding of chemistry. Connected chem- istry was implemented inside the NetLogo modeling environment. Its design goal is to present a variety of chemistry concepts from the perspective of \\

  6. ISSUES IN LIGNIN CHEMISTRY. "THE HELSINKI CONNECTION"

    Technology Transfer Automated Retrieval System (TEKTRAN)

    This presentation covers advances in lignin chemistry (and our Helsinki connection) on dibenzodioxocins, spirodienones, and reduced structures in lignins. It also explores the various roles in defending lignification theory (based on Freudenberg's original hypothesis) against a supposed new contende...

  7. Zone heated diesel particulate filter electrical connection

    DOEpatents

    Gonze, Eugene V. (Pinckney, MI); Paratore, Jr., Michael J. (Howell, MI)

    2010-03-30

    An electrical connection system for a particulate filter is provided. The system includes: a particulate filter (PF) disposed within an outer shell wherein the PF is segmented into a plurality of heating zones; an outer mat disposed between the particulate filter and the outer shell; an electrical connector coupled to the outer shell of the PF; and a plurality of printed circuit connections that extend along the outer surface of the PF from the electrical connector to the plurality of heating zones.

  8. Crossing Levels and Representations: The Connected Chemistry (CC1) Curriculum

    ERIC Educational Resources Information Center

    Levy, Sharona T.; Wilensky, Uri

    2009-01-01

    Connected Chemistry (named CC1 to denote Connected Chemistry Chapter 1) is a computer-based environment for learning the topics of gas laws and kinetic molecular theory in chemistry. It views chemistry from an "emergent" perspective, how macroscopic phenomena result from the interaction of many submicroscopic particles. Connected Chemistry employs…

  9. Connection of the Panama fracture zone with the Galapagos rift zone, eastern tropical Pacific

    Microsoft Academic Search

    Paul J. Grim

    1970-01-01

    Magnetic data recently collected in the eastern tropical Pacific confirm that the Galapagos rift zone is connected to the Panama fracture zone by a short north-south fracture zone (the Ecuador fracture zone) and a short east-west center of sea floor spreading (the Costa Rica rift zone). These features were found approximately in the locations predicted by Molnar and Sykes from

  10. PRECAST CONCRETE SHEAR WALL CONNECTIONS FOR SEISMIC ZONES

    E-print Network

    of mechanical shear connectors in addition to the continuity bars, dry-packed with post-tensioning, and two-core slab with and without post-tensioning. The performance of new innovative connections, such as partialPRECAST CONCRETE SHEAR WALL CONNECTIONS FOR SEISMIC ZONES K.A. Soudki(l) and S.H. Rizkalla(2

  11. "The Chemicals Project": Connecting General Chemistry to Students' Lives

    NASA Astrophysics Data System (ADS)

    Stout, Roland

    2000-10-01

    "The Chemicals Project" described here strives to bring freshman chemistry alive for students by emphasizing its connection to the real world and to their own lives and experiences. Its major assignments deal with chemical phobias, recognizing the chemicals found in everyday life and chemical hazards (using Material Data Safety Sheets). The project is described in a cooperative learning format, employs portfolio grading, and includes a significant writing component. Ways of linking this project with the course lecture and student evaluations of the project are described. The bottom line: pre- and post-testing shows that it works. The Chemicals Project brings chemistry alive for students.

  12. Connecting the Quiet-Sun Convection Zone and Corona

    NASA Astrophysics Data System (ADS)

    Abbett, W. P.

    We present the first results of a new numerical model designed to simultaneously evolve the upper convection zone and low-corona within a single computational domain. We characterize (1) the properties of a quiet-Sun model atmosphere that forms as a result of the action of a convective dynamo; (2) the efficacy of parameterized cooling as a means of approximating the physics of optically-thick radiative transfer in the model chromosphere; (3) the magnetic and thermodynamic properties of the quiet-Sun atmosphere, and the magnetic connectivity between the turbulent sub-surface layers and corona; and (4) the properties of horizontally-directed magnetic fields in the low atmosphere.

  13. EDITORIAL: Ice in the environment: connections to atmospheric chemistry Ice in the environment: connections to atmospheric chemistry

    NASA Astrophysics Data System (ADS)

    McNeill, V. Faye; Hastings, Meredith G.

    2008-12-01

    Ice in the environment, whether in the form of ice particles in clouds or sea ice and snow at the Earth's surface, has a profound influence on atmospheric composition and climate. The interaction of trace atmospheric gases with snow and sea ice surfaces largely controls atmospheric composition in polar regions. The heterogeneous chemistry of ice particles in clouds also plays critical roles in polar stratospheric ozone depletion and in tropospheric chemistry. A quantitative physical understanding of the interactions of snow and ice with trace gases is critical for predicting the effects of climate change on atmospheric composition, for the interpretation of ice core chemical records, and for modeling atmospheric chemistry. The motivation behind this focus issue of Environmental Research Letters (ERL), and the special session at the Fall 2007 meeting of the American Geophysical Union that generated it, was to enhance communication and interactions among field and laboratory scientists and modelers working in this area. Members of these three groups are each working toward a mutual goal of understanding and quantifying the connections between the chemistry of snow and ice in the environment and atmospheric composition, and communication and collaboration across these traditional disciplinary boundaries pose a challenge for the community. We are pleased to present new work from several current leaders in the field and laboratory communities in this focus issue. Topics include the interaction of organics and mercury with snow and ice surfaces, halogen activation from halide ice, and the emissions of reactive nitrogen oxides from snow. Novel experimental techniques are presented that make progress towards overcoming the experimental challenges of quantifying the chemistry of realistic snow samples and ice chemistry at temperatures relevant to the polar boundary layer. Several of the papers in this issue also touch on one of the significant gaps in our current understanding of the atmospheric chemistry of ice: the role of a quasi-liquid layer (QLL) or quasi-brine layer (QBL) at the ice surface. The studies presented here advance our understanding of the complex interactions of snow and ice with important reactive components in our atmosphere. It has become clear in recent years that the polar regions do not act as an ultimate sink for many compounds—the release of halogens and reactive nitrogen oxides from ice and snow are examples of this. Two notable implications arise from these findings (i) the impact of anthropogenic pollutants in our environment may extend further than we fully appreciate with current global atmospheric chemistry models and (ii) our interpretation of chemical records in ice cores requires that we fundamentally understand and quantify air-snow and air-ice interactions. Additionally, laboratory studies are elucidating the details of heterogeneous reactions that are prevalent on ice and snow surfaces throughout the troposphere, and we are poised to make significant strides in the near future quantifying these effects on regional and global scales. We look forward to continued progress in this field in the coming years, and we will continue to work to connect those conducting modeling, field and laboratory studies. Focus on Connections between Atmospheric Chemistry and Snow and Ice Contents HONO emissions from snow surfaces Harry Beine, Agustín J Colussi, Antonio Amoroso, Giulio Esposito, Mauro Montagnoli and Michael R Hoffmann Heterogeneous ozonation kinetics of phenanthrene at the air-ice interface T F Kahan and D J Donaldson Release of gas-phase halogens from sodium halide substrates: heterogeneous oxidation of frozen solutions and desiccated salts by hydroxyl radicals S J Sjostedt and J P D Abbatt Uptake of acetone, ethanol and benzene to snow and ice: effects of surface area and temperature J P D Abbatt, T Bartels-Rausch, M Ullerstam and T J Ye Interaction of gaseous elemental mercury with snow surfaces: laboratory investigation Thorsten Bartels-Rausch, Thomas Huthwelker, Martin Jöri, Heinz W Gägge

  14. Making Connections: Learning and Teaching Chemistry in Context

    ERIC Educational Resources Information Center

    King, Donna; Bellocchi, Alberto; Ritchie, Stephen M.

    2008-01-01

    Even though several studies have reported positive attitudinal outcomes from context-based chemistry programs, methodological obstacles have prevented researchers from comparing satisfactorily the chemistry-learning outcomes between students who experience a context-based program with those who experience a content-driven program. In this…

  15. Connecting Acids and Bases with Encapsulation... and Chemistry with Nanotechnology

    ERIC Educational Resources Information Center

    Criswell, Brett

    2007-01-01

    The features and the development of various new acids and bases activity sets that combines chemistry with nanotechnology are being described. These sets lead to the generation of many nanotechnology-based pharmaceuticals for the treatment of various diseases.

  16. Making Connections: Learning and Teaching Chemistry in Context

    Microsoft Academic Search

    Donna King; Alberto Bellocchi; Stephen M. Ritchie

    2008-01-01

    Even though several studies have reported positive attitudinal outcomes from context-based chemistry programs, methodological\\u000a obstacles have prevented researchers from comparing satisfactorily the chemistry-learning outcomes between students who experience\\u000a a context-based program with those who experience a content-driven program. In this narrative inquiry we are able to address\\u000a the question: how do the recalled experiences of a student and her teacher

  17. THE MAGNETIC CONNECTION BETWEEN THE CONVECTION ZONE AND CORONA IN THE QUIET SUN

    E-print Network

    Abbett, Bill

    THE MAGNETIC CONNECTION BETWEEN THE CONVECTION ZONE AND CORONA IN THE QUIET SUN W. P. Abbett Space connection between the convectively unstable layers below the visible surface of the Sun and the overlying application of this numerical model, we present a series of simulations of the quiet Sun in a domain

  18. HORIZONTAL CONNECTIONS FOR PRECAST CONCRETE LOAD BEARING SHEAR WALLS IN SEISMIC ZONES

    E-print Network

    to the continuity bars, dry-packed with post-tensioning, and two types of dry-packed multiple shear keys. The research also include connections which support hollow-core slab with and without post-tensioningHORIZONTAL CONNECTIONS FOR PRECAST CONCRETE LOAD BEARING SHEAR WALLS IN SEISMIC ZONES Sami H

  19. The chemistry of subduction-zone fluids Craig E. Manning*

    E-print Network

    Manning, Craig

    Sciences, University of California at Los Angeles, Los Angeles, CA 90095-1567, USA Received 24 April 2004 elements even in H2O-rich fluids. Subduction-zone fluids may be surprisingly dilute, having only two-element patterns of fluids carrying only dissolved silicate components are similar to those of primitive island

  20. An African Chemistry Connection: Simulating Early Iron Smelting.

    ERIC Educational Resources Information Center

    Murfin, Brian

    1996-01-01

    Presents a lesson plan that uses information about traditional African iron-smelting to highlight the scientific contributions of non-European cultures. Includes a laboratory activity on the reduction of metal oxides with a multicultural perspective that helps students grasp some of the chemistry concepts involved in smelting. (JRH)

  1. Are separated volcanoes connected through a horizontal partial melt zone?

    NASA Astrophysics Data System (ADS)

    Linde, A.; Sacks, S.; Kamigaichi, O.

    2003-04-01

    The Japan Meteorological Agency installed and operates a network of Sacks-Evertson borehole strainmeters in south-east Honshu. One of these instruments is on Izu-Oshima, a volcanic island at the northern end of the Izu-Bonin arc. That strainmeter recorded large strain changes associated with the 1986 Izu-Oshima eruption. Miyake-jima, about 75 km south of Izu-Oshima, erupted in 1983. No deformation monitoring was available on Miyake but several changes occurred in the strain record at Izu-Oshima. There was a clear change in the long-term strain rate beginning 2 days before the Miyake eruption. Short period events recorded by the strainmeter occurred more frequently in the months before the Miyake eruption and ceased completely following the eruption. The Izu-Oshima strainmeter showed that, over the period from 1980 to the 1986 eruption, the amplitude of the solid earth tides changed by almost a factor of two. At the time of the Miyake eruption, the rate of increase of the tidal amplitude also changed. While all of these changes were observed on a single instrument, they are very different types of change. From a number of independent checks, we can be sure that the strainmeter did not experience any change in performance at that time. Thus it recorded a change in deformation behavior in three very different frequency bands: over very long term, at tidal periods (~day) and at very short periods (minutes). It appears that the distant eruption in 1983 had an effect on the magmatic system under Izu-Oshima. More recently, tomographic and seismic attenuation work in the Tohoku (northern Honshu) area has show the existence of a low velocity, high attenuation horizontally elongated structure under the volcanic front. It is likely that this is a zone of partial melt and that this zone is a supply of magma for the volcanic activity. The tectonic setting for Miyake-jima and Izu-Oshima is very similar to that for Tohoku and we expect that these volcanoes are also underlain by a low Q, low velocity (i.e. partial melt) zone. If so, it could provide a mechanism for communication between the volcanoes.

  2. Students' Learning with the Connected Chemistry (CC1) Curriculum: Navigating the Complexities of the Particulate

    E-print Network

    Wilensky, Uri

    Departments of Learning Sciences and Computer Science, Center for Connected Learning and Computer Chemistry, chapter 1), a computer-based environment for learning the topics of gas laws and kinetic with respect to the conceptual framework and the benefits of assessment of learning using a fine-tuned profile

  3. Cortical Connections of Functional Zones in Posterior Parietal Cortex and Frontal Cortex Motor Regions in New World Monkeys

    PubMed Central

    Stepniewska, Iwona; Kaas, Jon H.

    2011-01-01

    We examined the connections of posterior parietal cortex (PPC) with motor/premotor cortex (M1/PM) and other cortical areas. Electrical stimulation (500 ms trains) delivered to microelectrode sites evoked movements of reach, defense, and grasp, from distinct zones in M1/PM and PPC, in squirrel and owl monkeys. Tracer injections into M1/PM reach, defense, and grasp zones showed dense connections with M1/PM hand/forelimb representations. The densest inputs outside of frontal cortex were from PPC zones. M1 zones were additionally connected with somatosensory hand/forelimb representations in areas 3a, 3b, and 1 and the somatosensory areas of the upper bank of the lateral sulcus (S2/PV). Injections into PPC zones showed primarily local connections and the densest inputs outside of PPC originated from M1/PM zones. The PPC reach zone also received dense inputs from cortex caudal to PPC, which likely relayed visual information. In contrast, the PPC grasp zone was densely connected with the hand/forelimb representations of areas 3a, 3b, 1, and S2/PV. Thus, the dorsal parietal–frontal network involved in reaching was preferentially connected to visual cortex, whereas the more ventral network involved in grasping received somatosensory inputs. Additional weak interlinks between dissimilar zones (e.g., PPC reach and PPC grasp) were apparent and may coordinate actions. PMID:21263034

  4. The Connection between Success in a Freshman Chemistry Class and a Student's Jungian Personality Type

    NASA Astrophysics Data System (ADS)

    Clark, Gale J.; Riley, Wayne D.

    2001-10-01

    This paper explores the connection between a student's performance in a freshman chemistry class and his or her personality type. Performance was gauged by the final percentage grade earned in class and personality type was based on Carl G. Jung's personality typology as assessed by the Myers-Briggs Type Indicator (MBTI). Performance and personality type were correlated using ANOVA statistics. The results show that only one of the 16 personality types had a class average that was significantly higher than 14 of the other 15 types. The lowest-scoring type was also significantly lower than 3 other personality types. This research shows that characteristics of personality types may be a basis for assisting or deterring success in a general chemistry class. Data on the personality types of 23 chemistry professors suggest that a success bias may be amplified by similar personality traits in the instructors.

  5. Dynamics of plasmodesmal connectivity in successive interfaces of the cambial zone

    Microsoft Academic Search

    Katrin Ehlers; Aart J. E. van Bel

    2010-01-01

    Frequency, density and branching of plasmodesmata were counted in successive tangential and transverse walls in the cambial\\u000a zone of tomato stems in order to examine development of the plasmodesmal network in a chronological order. Coincident with\\u000a progress of cell development, plasmodesmal connectivity increased, both at the xylem- and phloem-side. In transverse walls,\\u000a the number of secondary plasmodesmata enhanced considerably. The

  6. Development and Implementation of a Series of Laboratory Field Trips for Advanced High School Students to Connect Chemistry to Sustainability

    ERIC Educational Resources Information Center

    Aubrecht, Katherine B.; Padwa, Linda; Shen, Xiaoqi; Bazargan, Gloria

    2015-01-01

    We describe the content and organization of a series of day-long field trips to a university for high school students that connect chemistry content to issues of sustainability. The seven laboratory activities are in the areas of environmental degradation, energy production, and green chemistry. The laboratory procedures have been modified from…

  7. Investigating macroscopic, submicroscopic, and symbolic connections in a college-level general chemistry laboratory

    NASA Astrophysics Data System (ADS)

    Thadison, Felicia Culver

    Explanations of chemical phenomena rely on understanding the behavior of submicroscopic particles. Because this level is "invisible," it is described using symbols such as models, diagrams and equations. For this reason, students often view chemistry as a "difficult" subject. The laboratory offers a unique opportunity for the students to experience chemistry macroscopically as well as symbolically. The purpose of this investigation was to determine how chemistry lab students explained chemical phenomenon on the macroscopic, submicroscopic, and representational/symbolic level. The participants were undergraduate students enrolled in an introductory level general chemistry lab course. Students' background information (gender, the number of previous chemistry courses), scores on final exams, and final average for the course were collected. Johnstone's triangle of representation guided the design and implementation of this study. A semi-structured interview was also conducted to bring out student explanations. The questionnaires required students to draw a molecule of water, complete acid base reaction equations, represent, submicroscopically, the four stages of an acid-base titration, and provide definitions of various terms. Students were able represent the submicroscopic level of water. Students were not able to represent the submicroscopic level of the reaction between an acid and a base. Students were able to represent the macroscopic level of an acid base reaction. Students were able to symbolically represent the reaction of an acid and a base. These findings indicate that students can use all three levels of chemical representation. However, students showed an inability to connect the levels in relation to acid-base chemistry. There was no relationship between a student's ability to use the levels and his or her final score in the course.

  8. Adenine Synthesis in a Model Prebiotic Reaction: Connecting Origin of Life Chemistry with Biology

    PubMed Central

    2011-01-01

    Many high school laboratory experiments demonstrate concepts related to biological evolution, but few exist that allow students to investigate life’s chemical origins. This series of laboratory experiments has been developed to allow students to explore and appreciate the deep connection that exists between prebiotic chemistry, chemical evolution, and contemporary biological systems. In the first experiment of the series, students synthesize adenine, one of the purine nucleobases of DNA and RNA, from plausibly prebiotic precursor molecules. Students compare their product to authentic standards using thin-layer chromatography. The second and third experiments of the series allow students to extract DNA from a familiar organism, the strawberry, and hydrolyze it, releasing adenine, which they can then compare to the previously chemically-synthesized adenine. A fourth, optional experiment is included where the technique of thin-layer chromatography is introduced and chromatographic skills are developed for use in the other three experiments that comprise this series. Concepts relating to organic and analytical chemistry, as well as biochemistry and DNA structure, are incorporated throughout, allowing this series of laboratory experiments to be easily inserted into existing laboratory courses and to reinforce concepts already included in any high school chemistry or biology curriculum. PMID:22075932

  9. Fluid chemistry in the fault propataion zone in the mid-crust -fluid inclusion chemistry from the Lishan fault, Taiwan-

    NASA Astrophysics Data System (ADS)

    Okamoto, K.; Iijima, C.; Kurosawa, M.; Chan, Y.; Terabayashi, M.

    2011-12-01

    Liberation of CO2-rich gas from fluid preserved in the fault propagation zone would be important phenomena in the earthquake and aftershock process. We have detected that injected fluid in link thrust would cause fault propagation and fault lubrication due to vapor-separation [1]. Recently, one of the authors, Yu-Chang Chan found unusual quartz vein on the great link-thrust, Lishan fault, in Taiwan orogenic belt [1]. The quartz vein is spherical shape and is composed of large crystals. The transparent quartz grains contain large primary fluid inclusions over 100 microns in diameters. The fluid inclusion is classified as three kinds of group. That is, two phase, vapor phase and three phase inclusion. Homogenization temperature is 260 oC and NaCl weight pecent is estimated to be 7.41. In order to measure the fluid chemistry, PIXE analysis was done at Tsukuba University. Analytical procedure is shown in [2]. The result is summarized as follows. 1. Br/Cr ratio is lower than that in seawater. 2. Ti, Cr, and Ni contents are high, suggesting that fluid is related to magma activity. 3. Vapor-phase inclusion contains considerable amount of metal elements (Ti, Zn, Ge, Mn, Ca, Fe, Pb, Rb, and Cu) as well as K, and Br. Fractionation between the vapor and the fluid would be useful tool to detect vapor separation due to fault propagation. References [1] Chan, Y. et al., Terra Nova 17, 439-499 (2005) [2] Kurosawa M. et al.,Island Arc, 19, 17-29 (2010)

  10. Volatile and N isotope chemistry of the Molucca Sea collision zone: Tracing source components along the Sangihe Arc, Indonesia

    Microsoft Academic Search

    Laura E. Clor; Tobias P. Fischer; David R. Hilton; Zachary D. Sharp; Udi Hartono

    2005-01-01

    Volcanic gases are sensitive indicators of subduction processes and are used to evaluate the contributions from various source components. Nitrogen isotope systematics in particular are a valuable tool for determining the fate of organic matter in subduction zones. We present the first arc-wide survey of trace gas chemistry and nitrogen isotope variations from the Sangihe Arc of northeastern Indonesia, where

  11. Coupled effects of solution chemistry and hydrodynamics on the mobility and transport of quantum dot nanomaterials in the Vadose Zone

    Technology Transfer Automated Retrieval System (TEKTRAN)

    To investigate the coupled effects of solution chemistry and vadose zone processes on the mobility of quantum dot (QD) nanoparticles, laboratory scale transport experiments were performed. The complex coupled effects of ionic strength, size of QD aggregates, surface tension, contact angle, infiltrat...

  12. Pore fluid chemistry of the North Anatolian Fault Zone in the Sea of Marmara: A diversity of sources and processes

    Microsoft Academic Search

    M. D. Tryon; P. Henry; M. N. Ça?atay; T. A. C. Zitter; L. Géli; L. Gasperini; P. Burnard; S. Bourlange; C. Grall

    2010-01-01

    As part of the 2007 Marnaut cruise in the Sea of Marmara, an investigation of the pore fluid chemistry of sites along the Main Marmara Fault zone was conducted. The goal was to define the spatial relationship between active faults and fluid outlets and to determine the sources and evolution of the fluids. Sites included basin bounding transtensional faults and

  13. Explore the Functional Connectivity between Brain Regions during a Chemistry Working Memory Task

    PubMed Central

    Chou, Wen-Chi; Duann, Jeng-Ren; She, Hsiao-Ching; Huang, Li-Yu; Jung, Tzyy-Ping

    2015-01-01

    Previous studies have rarely examined how temporal dynamic patterns, event-related coherence, and phase-locking are related to each other. This study assessed reaction-time-sorted spectral perturbation and event-related spectral perturbation in order to examine the temporal dynamic patterns in the frontal midline (F), central parietal (CP), and occipital (O) regions during a chemistry working memory task at theta, alpha, and beta frequencies. Furthermore, the functional connectivity between F-CP, CP-O, and F-O were assessed by component event-related coherence (ERCoh) and component phase-locking (PL) at different frequency bands. In addition, this study examined whether the temporal dynamic patterns are consistent with the functional connectivity patterns across different frequencies and time courses. Component ERCoh/PL measured the interactions between different independent components decomposed from the scalp EEG, mixtures of time courses of activities arising from different brain, and artifactual sources. The results indicate that the O and CP regions’ temporal dynamic patterns are similar to each other. Furthermore, pronounced component ERCoh/PL patterns were found to exist between the O and CP regions across each stimulus and probe presentation, in both theta and alpha frequencies. The consistent theta component ERCoh/PL between the F and O regions was found at the first stimulus and after probe presentation. These findings demonstrate that temporal dynamic patterns at different regions are in accordance with the functional connectivity patterns. Such coordinated and robust EEG temporal dynamics and component ERCoh/PL patterns suggest that these brain regions’ neurons work together both to induce similar event-related spectral perturbation and to synchronize or desynchronize simultaneously in order to swiftly accomplish a particular goal. The possible mechanisms for such distinct component phase-locking and coherence patterns were also further discussed. PMID:26039885

  14. Effects of carbon dioxide variations in the unsaturated zone on water chemistry in a glacial-outwash aquifer

    USGS Publications Warehouse

    Lee, R.W.

    1997-01-01

    The research site at Otis Air Base, Cape Cod, Massachusetts, has been developed for hydrogeological and geochemical studies of sewage-effluent contaminated groundwater since 1982. Research of hydrologic properties, transport, and chemical and biological processes is ongoing, but the origin of background water chemistry has not been determined. The principal geochemical process giving rise to the observed background water chemistry is CO2-controlled hydrolysis of Na feldspar. Geochemical modeling demonstrated that CO2 sources could vary over the project area. Analyses of unsaturated zone gases showed variations in CO2 which were dependent on land use and vegetative cover in the area of groundwater recharge. Measurements of CO2 in unsaturated-zone gases showed that concentrations of total inorganic C in recharge water should range from about 0.035 to 1.0 mmoles/L in the vicinity of Otis Air Base. Flux of CO2 from the unsaturated zone varied for a principal land uses, ranging from 86 gC/m2/yr for low vegetated areas to 1630 gC/m2/yr for a golf course. Carbon dioxide flux from woodlands was 220 gC/m2/yr, lower than reported fluxes of 500 to 600 gC/m2/yr for woodlands in a similar climate. Carbon dioxide flux from grassy areas was 540 gC/m2/yr, higher than reported fluxes of 230 to 490 gC/m2/yr for grasslands in a similar climate.

  15. Archean inheritance in zircon from late Paleozoic granites from the Avalon zone of southeastern New England: an African connection

    USGS Publications Warehouse

    Zartman, R.E.; Don, Hermes O.

    1987-01-01

    In southeastern New England the Narragansett Pier Granite locally intrudes Carboniferous metasedimentary rocks of the Narragansett basin, and yields a monazite UPb Permian emplacement age of 273 ?? 2 Ma. Zircon from the Narragansett Pier Granite contains a minor but detectable amount of an older, inherited component, and shows modern loss of lead. Zircon from the late-stage, aplitic Westerly Granite exhibits a more pronounced lead inheritance -permitting the inherited component to be identified as Late Archean. Such old relict zircon has not been previously recognized in Proterozoic to Paleozoic igneous rocks in New England, and may be restricted to late Paleozoic rocks of the Avalon zone. We suggest that the Archean crustal component reflects an African connection, in which old Archean crust was underplated to the Avalon zone microplate in the late Paleozoic during collision of Gondwanaland with Avalonia. ?? 1987.

  16. Chemistry

    NSDL National Science Digital Library

    K-12 Outreach,

    Chemistry is the scientific study of matter and its interaction with other matter and with energy. It is the branch of natural science that deals with the composition of substances and their properties and reactions.

  17. Investigating Macroscopic, Submicroscopic, and Symbolic Connections in a College-Level General Chemistry Laboratory

    ERIC Educational Resources Information Center

    Thadison, Felicia Culver

    2011-01-01

    Explanations of chemical phenomena rely on understanding the behavior of submicroscopic particles. Because this level is "invisible," it is described using symbols such as models, diagrams and equations. For this reason, students often view chemistry as a "difficult" subject. The laboratory offers a unique opportunity for the students to…

  18. General Chemistry: Expanding the Learning Outcomes and Promoting Interdisciplinary Connections through the Use of a Semester-long Project

    PubMed Central

    Wenzel, Thomas J.

    2006-01-01

    The laboratory component of a first-semester general chemistry course for science majors is described. The laboratory involves a semester-long project undertaken in a small-group format. Students are asked to examine whether plants grown in soil contaminated with lead take up more lead than those grown in uncontaminated soil. They are also asked to examine whether the acidity of the rainwater affects the amount of lead taken up by the plants. Groups are then given considerable independence in the design and implementation of the experiment. Once the seeds are planted, which takes about 4 wk into the term, several shorter experiments are integrated in before it is time to harvest and analyze the plants. The use of a project and small working groups allows for the development of a broader range of learning outcomes than occurs in a “traditional” general chemistry laboratory. The nature of these outcomes and some of the student responses to the laboratory experience are described. This particular project also works well at demonstrating the connections among chemistry, biology, geology, and environmental studies. PMID:17012193

  19. Changes in Carbon Chemistry and Stability Along Deep Tropical Soil Profiles at the Luquillo Critical Zone Observatory

    NASA Astrophysics Data System (ADS)

    Stone, M.; Hockaday, W. C.; Plante, A. F.

    2014-12-01

    Tropical forests are the largest terrestrial carbon (C) sink, and tropical forest soils contribute disproportionately to the poorly-characterized deep soil C pool. The goal of this study was to evaluate how carbon chemistry and stability change with depth in tropical forest soils formed on two contrasting parent materials. We used soils from pits excavated to 140 cm depth that were stratified across two soil types (Oxisols and Inceptisols) at the Luquillo Critical Zone Observatory in northeast Puerto Rico. We used 13C nuclear magnetic resonance (NMR) spectroscopy to characterize soil C chemistry and differential scanning calorimetry (DSC) coupled with evolved gas analysis (CO2-EGA) to evaluate the thermal stability of soil C during ramped combustion. Thirty-four samples with an initial C concentration ?1% were chosen from discrete depth intervals (0, 30, 60, 90 & 140 cm) for 13C NMR analysis, while DSC was performed on 122 samples that included the NMR sample set and additional samples at 20, 50, 80 and 110 cm depth. Preliminary 13C NMR results indicate higher alkyl : O-alkyl ratios and an enrichment of aliphatic and proteinaceous C with depth, compared with greater aromatic and carbohydrate signals in surface soils. The energy density of soil C (J mg-1 C) also declined significantly with depth. In Oxisols, most CO2 evolution from combustion occurred around 300ºC, while most CO2 evolution occurred at higher temperatures (400-500ºC) in Inceptisols. Our findings suggest soil C is derived primarily of plant biomolecules in surface soils and becomes increasingly microbial with depth. Soil matrix-mediated differences in C transport and preservation may result in differences in C chemistry between the two soil types and a more thermally labile C pool in the Oxisols. We suggest that energy-poor substrates, combined with potentially stronger organo-mineral interactions in subsoils, may explain the long-term stability of deep C in highly weathered tropical soils.

  20. 7/22/08 11:54 AM 1 Particulate Matter Chemistry and Dynamics in the Twilight Zone at VERTIGO ALOHA1

    E-print Network

    Buesseler, Ken

    7/22/08 11:54 AM 1 Particulate Matter Chemistry and Dynamics in the Twilight Zone at VERTIGO ALOHA1 weeks,19 contrasted oligotrophic station ALOHA (22.75°N 158°W), sampled in June ­ July 2004. Particulate >51 µm Corg, N, and P at both33 ALOHA and K2 showed strong attenuation with depth at both sites

  1. Coupled effects of solution chemistry and hydrodynamics on the mobility and transport of quantum dot nanomaterials in the vadose zone.

    PubMed

    Uyusur, Burcu; Darnault, Christophe J G; Snee, Preston T; Kokën, Emre; Jacobson, Astrid R; Wells, Robert R

    2010-11-25

    To investigate the coupled effects of solution chemistry and hydrodynamics on the mobility of quantum dot (QD) nanoparticles in the vadose zone, laboratory scale transport experiments involving single and/or sequential infiltrations of QDs in unsaturated and saturated porous media, and computations of total interaction and capillary potential energies were performed. As ionic strength increased, QD retention in the unsaturated porous media increased; however, this retention was significantly suppressed in the presence of a non-ionic surfactant in the infiltration suspensions as indicated by surfactant enhanced transport of QDs. In the vadose zone, the non-ionic surfactant limited the formation of QD aggregates, enhanced QD mobility and transport, and lowered the solution surface tension, which resulted in a decrease in capillary forces that not only led to a reduction in the removal of QDs, but also impacted the vadose zone flow processes. When chemical transport conditions were favorable (ionic strength of 5 × 10(-4)M and 5 × 10(-3)M, or ionic strengths of 5 × 10(-2)M and 0.5M with surfactant), the dominating phenomena controlling the mobility and transport of QDs in the vadose zone were meso-scale processes, where infiltration by preferential flow results in the rapid transport of QDs. When chemical transport conditions were unfavorable (ionic strength of 5 × 10(-2)M and 0.5M) the dominating phenomena controlling the mobility and transport of QDs in the vadose zone were pore-scale processes governed by gas-water interfaces (GWI) that impact the mobility of QDs. The addition of surfactant enhanced the transport of QDs both in favorable and unfavorable chemical transport conditions. The mobility and retention of QDs was controlled by interaction and capillary forces, with the latter being the most influential. GWI were found to be the dominant mechanism and site for QD removal compared with solid-water interfaces (SWI) and pore straining. Additionally, ripening phenomena were demonstrated to enhance QDs removal or retention in porous media and to be attenuated by the presence of surfactant. PMID:21056511

  2. APPLICATIONS OF MOLECULAR CONNECTIVITY INDEXES AND MULTIVARIATE ANALYSIS IN ENVIRONMENTAL CHEMISTRY

    EPA Science Inventory

    The authors have developed a data matrix of 90 variables calculated from molecular connectivity indices for 19,972 chemicals in the Toxic Substance Control Act (TSCA) inventory of industrial chemicals. The first three principal components convey generalized information on chemica...

  3. Comparative mineral chemistry and textures of SAFOD fault gouge and damage-zone rocks

    USGS Publications Warehouse

    Moore, Diane E.

    2014-01-01

    Creep in the San Andreas Fault Observatory at Depth (SAFOD) drillhole is localized to two foliated gouges, the central deforming zone (CDZ) and southwest deforming zone (SDZ). The gouges consist of porphyroclasts of serpentinite and sedimentary rock dispersed in a foliated matrix of Mg-smectite clays that formed as a result of shearing-enhanced reactions between the serpentinite and quartzofeldspathic rocks. The CDZ takes up most of the creep and exhibits differences in mineralogy and texture from the SDZ that are attributable to its higher shearing rate. In addition, a ?0.2-m-wide sector of the CDZ at its northeastern margin (NE-CDZ) is identical to the SDZ and may represent a gradient in creep rate across the CDZ. The SDZ and NE-CDZ have lower clay contents and larger porphyroclasts than most of the CDZ, and they contain veinlets and strain fringes of calcite in the gouge matrix not seen elsewhere in the CDZ. Matrix clays in the SDZ and NE-CDZ are saponite and corrensite, whereas the rest of the CDZ lacks corrensite. Saponite is younger than corrensite, reflecting clay crystallization under declining temperatures, and clays in the more actively deforming portions of the CDZ have better equilibrated to the lower-temperature conditions.

  4. pH at the Air-Ice Interface: Connections to Halogen Activation Chemistry

    NASA Astrophysics Data System (ADS)

    Wren, S. N.; Abbatt, J.; Donaldson, D. J.

    2014-12-01

    Halogen activation - the conversion of relatively inert sea-salt derived halides, into reactive halogen species - has significant implications for perturbing the oxidative capacity of the boundary layer, as well as for mercury oxidation. Developing a good, mechanistic understanding of halogen activation chemistry - and particularly its pH dependence - requires knowledge of surface pH. Here we described the development and use of a surface-sensitive spectroscopic approach to investigate pH at frozen surfaces. The approach, which involves glancing-angle laser-induced fluorescence in conjunction with pH-sensitive fluorescent dyes (acridine and harmine), was used to study pH at frozen surfaces following the deposition of gas phase acids or bases. We demonstrate that frozen 'pure water' and frozen 'salt water' surfaces exhibit different responses. The responses are consistent with the presence of a chemically unique, disordered region at the frozen 'pure water' surface and the presence of liquid brine at the frozen 'salt water' surface. Significantly, we show that a frozen sea water surface is resistant to changes in pH, suggesting that some buffering capacity is maintained upon freezing. Finally the pH dependence of bromine and chlorine activation from artificial saline snow is presented. Bromine release is found to depend less strongly on pre-freezing snow pH, but the release of both species is favoured for low pre-freezing pH values. In the context of these pH and halogen activation studies, the potential importance of various frozen sea ice substrates for promoting halogen activation chemistry will be discussed.

  5. Pore fluid chemistry of the North Anatolian Fault Zone in the Sea of Marmara: A diversity of sources and processes

    NASA Astrophysics Data System (ADS)

    Tryon, M. D.; Henry, P.; ?A?Atay, M. N.; Zitter, T. A. C.; GéLi, L.; Gasperini, L.; Burnard, P.; Bourlange, S.; Grall, C.

    2010-10-01

    As part of the 2007 Marnaut cruise in the Sea of Marmara, an investigation of the pore fluid chemistry of sites along the Main Marmara Fault zone was conducted. The goal was to define the spatial relationship between active faults and fluid outlets and to determine the sources and evolution of the fluids. Sites included basin bounding transtensional faults and strike-slip faults cutting through the topographic highs. The basin pore fluids are dominated by simple mixing of bottom water with a brackish, low-density Pleistocene Lake Marmara end-member that is advecting buoyantly and/or diffusing from a relatively shallow depth. This mix is overprinted by shallow redox reactions and carbonate precipitation. The ridge sites are more complex with evidence for deep-sourced fluids including thermogenic gas and evidence for both silicate and carbonate diagenetic processes. One site on the Western High displayed two mound structures that appear to be chemoherms atop a deep-seated fluid conduit. The fluids being expelled are brines of up to twice seawater salinity with an exotic fluid chemistry extremely high in Li, Sr, and Ba. Oil globules were observed both at the surface and in cores, and type II gas hydrates of thermogenic origin were recovered. Hydrate formation near the seafloor contributes to increase brine concentration but cannot explain their chemical composition, which appears to be influenced by diagenetic reactions at temperatures of 75°C-150°C. Hence, a potential source for fluids at this site is the water associated with the reservoir from which the gas and oil is seeping, which has been shown to be related to the Thrace Basin hydrocarbon system. Our work shows that submerged continental transform plate boundaries can be hydrologically active and exhibit a diversity of sources and processes.

  6. Parallel observations of groundwater and stream water chemistry through the critical zone: new insight into the concentration-discharge relationships

    NASA Astrophysics Data System (ADS)

    Kim, H.; Dietrich, W. E.; Bishop, J. K. B.; Fung, I. Y.

    2014-12-01

    Catchment hydrogeochemists have long been puzzled by the 'chemostatic' behavior of rivers: solute concentrations remain nearly invariant while discharge fluctuates several orders of magnitude. Past studies have tended to focus on stream chemistry measurements. Little attention has been paid to source waters (i.e. groundwater). In this study, we simultaneously monitored water chemistry of stream and groundwater at 1-3 days intervals for four years in the Elder Creek catchment, the Eel Critical Zone Observatory, California. At our study site, all runoff occurs as groundwater flow. During the winter high-flow regime, cation (Ca, Mg, Na, K, Ba and Sr) concentrations in stream and groundwater were remarkably similar throughout the study period and were 5-100 times higher than that of throughfall. In contrast, during the low-flow regime, the cation concentrations in groundwater were higher than that in stream, and concentration differences varied by element. We propose that during the high-flow regime, rainwater rapidly increases solute concentrations by cation exchange reactions enhanced by pCO2 in the vadose zone, recharging groundwater and draining into the stream. During the dry season, groundwater reaches thermodynamic equilibrium with the argillite, particularly with carbonates, at high pCO2. As this groundwater enters the stream, CO2 degasses and consequently carbonates precipitate, decreasing Ca, Mg, Sr and Ba concentrations at the hillslope-stream interface. These cation concentrations are further decreased as carbonates likely mediated by biology-induced processes. These observations suggest that the apparent chemostatic behavior of Elder Creek does not arise from the failure of high flows to progressively dilute, as concentration in the creek and in the source groundwater are quite similar. Rather at progressively lower flow, stream concentration does not increase to match the low flow concentration in the groundwater. Instead as groundwater emerges, degassing and precipitation causes concentrations to drop and depress concentration increase with decreasing flow in the creek. This process can only be assessed by direct measurement of source groundwater: even emergent spring water will have already degassed and loss solutes to precipitation.

  7. Chemistry, isotopic composition, and origin of a methane-hydrogen sulfide hydrate at the Cascadia subduction zone

    USGS Publications Warehouse

    Kastner, M.; Kvenvolden, K.A.; Lorenson, T.D.

    1998-01-01

    Although the presence of extensive gas hydrate on the Cascadia margin, offshore from the western U.S. and Canada, has been inferred from marine seismic records and pore water chemistry, solid gas hydrate has only been found at one location. At Ocean Drilling Program (ODP) Site 892, offshore from central Oregon, gas hydrate was recovered close to the sediment - water interface at 2-19 m below the seafloor, (mbsf) at 670 m water depth. The gas hydrate occurs as elongated platy crystals or crystal aggregates, mostly disseminated irregularly, with higher concentrations occurring in discrete zones, thin layers, and/or veinlets parallel or oblique to the bedding. A 2-to 3-cm thick massive gas hydrate layer, parallel to bedding, was recovered at ???17 mbsf. Gas from a sample of this layer was composed of both CH4 and H2S. This sample is the first mixed-gas hydrate of CH4-H2S documented in ODP; it also contains ethane and minor amounts of CO2. Measured temperature of the recovered core ranged from 2 to - 18??C and are 6 to 8 degrees lower than in-situ temperatures. These temperature anomalies were caused by the partial dissociation of the CH4-H2S hydrate during recovery without a pressure core sampler. During this dissociation, toxic levels of H2S (??34S, +27.4???) were released. The ??13C values of the CH4 in the gas hydrate, -64.5 to -67.5???(PDB), together with ??D values of - 197 to - 199???(SMOW) indicate a primarily microbial source for the CH4. The ??18O value of the hydrate H2O is +2.9???(SMOW), comparable with the experimental fractionation factor for sea-ice. The unusual composition (CH4-H2S) and depth distribution (2-19 mbsf) of this gas hydrate indicate mixing between a methane-rich fluid with a pore fluid enriched in sulfide; at this site the former is advecting along an inclined fault into the active sulfate reduction zone. The facts that the CH4-H2S hydrate is primarily confined to the present day active sulfate reduction zone (2-19 mbsf), and that from here down to the BSR depth (19-68 mbsf) the gas hydrate inferred to exist is a ???99% CH4 hydrate, suggest that the mixing of CH4 and H2S is a geologically young process. Because the existence of a mixed CH4-H2S hydrate is indicative of moderate to intense advection of a methane-rich fluid into a near surface active sulfate reduction zone, technically active (faulted) margins with organic-rich sediments and moderate to high sedimentation rates are the most likely regions of occurrence. The extension of such a mixed hydrate below the sulfate reduction zone should reflect the time-span of methane advection into the sulfate reduction zone. ?? 1998 Elsevier Science B.V. All rights reserved.

  8. For the love of learning science: Connecting learning orientation and career productivity in physics and chemistry

    NASA Astrophysics Data System (ADS)

    Hazari, Zahra; Potvin, Geoff; Tai, Robert H.; Almarode, John

    2010-06-01

    An individual’s motivational orientation serves as a drive to action and can influence their career success. This study examines how goal orientation toward the pursuit of a graduate degree in physics and chemistry influences later success outcomes of practicing physicists and chemists. Two main categories of goal orientation are examined in this paper: performance orientation or motivation to demonstrate one’s ability or performance to others, and learning orientation or motivation through the desire to learn about a topic. The data were obtained as part of Project Crossover, a mixed-methods study which focused on studying the transition from graduate student to scientist in the physical sciences and included a survey of members of two national professional physical science organizations. Using regression analysis on data from 2353 physicists and chemists, results indicate that physicists and chemists who reported a learning orientation as their motivation for going to graduate school were more productive, in terms of total career primary and/or first-author publications and grant funding, than those reporting a performance orientation. Furthermore, given equal salary, learning-oriented individuals produced more primary and/or first-author publications than their nonlearning oriented counterparts.

  9. Grounding formative assessment in high-school chemistry classrooms: Connections between professional development and teacher practice

    NASA Astrophysics Data System (ADS)

    Cisterna Alburquerque, Dante Igor

    This study describes and analyzes the experiences of two high-school chemistry teachers who participated in a team-based professional development program to learn about and enact formative assessment in their classrooms. The overall purpose of this study is to explain how participation in this professional development influenced both teachers' classroom enactment of formative assessment practices. This study focuses on 1) teachers' participation in the professional development program, 2) teachers' enactment of formative assessment, and 3) factors that enabled or hindered enactment of formative assessment. Drawing on cultural-historical activity theory (CHAT) and using evidence from teacher lessons, teacher interviews, professional development meetings as data sources, this single embedded case study analyzes how these two teachers who participated in the same learning team and have similar characteristics (i.e., teaching in the same school, teaching the same courses and population of students, and using the same materials) differentially used the professional development learning about formative assessment as mediating tools to improve their classroom instruction. The learning team experience contributed to both teachers' development of a better understanding of formative assessment---especially in recognizing that their current grading and assessment practices were not appropriate to promote student learning---and the co-creation of artifacts to gather evidence of students' ideas. Although both teachers demonstrated understanding about how formative assessment may serve to promote student learning and had a set of tools available to utilize for formative assessment use, they did not enact these tools in the same way. One teacher appropriated formative assessment as mediating tool to verify if the students were following her explanations, and to check if the students were able to provide the correct response. The other teacher used the mediating tool to promote better understanding of students' ideas and her mindset shifted to place more value on the diversity of students' thinking and help them be more aware of their ideas. This study illustrates the complexities of enacting formative assessment practices in particular classrooms because teachers may interpret and use these tools in different ways. Thus, when teachers enacted these mediating tools, their interaction with the activity system's components produced different instructional outcomes and tensions. Similarly, this study describes how the use of artifacts of practice can be a vehicle between professional development and classrooms, especially in early stages of professional development. This study presents implications for professional development and formative assessment research and practice. Professional development needs to support teachers in reflecting on their practice in terms of activity systems, use a solid and research-based understanding of formative assessment, and promote opportunities to teachers to create, enact, and reflect on formative assessment artifacts and tools.

  10. Particulate matter chemistry and dynamics in the twilight zone at VERTIGO ALOHA and K2 sites

    NASA Astrophysics Data System (ADS)

    Bishop, James K. B.; Wood, T. J.

    2008-12-01

    Understanding particle dynamics in the 'Twilight Zone' is critical to prediction of the ocean's carbon cycle. As part of the VERtical Transport In the Global Ocean (VERTIGO) project, this rarely sampled regime extending from the base of the euphotic layer to 1000 m, was characterized by double-paired day/night Multiple Unit Large Volume in-situ Filtration System (MULVFS) deployments and by ˜100 high-frequency CTD/transmissometer/turbidity sensor profiles. VERTIGO studies lasting 3 weeks, contrasted oligotrophic station ALOHA (22.75°N 158°W), sampled in June-July 2004, with a biologically productive location (47 °N 161°E) near station K2 in the Oyashio, occupied July-August 2005. Profiles of major and minor particulate components (C org, N, P, Ca, Si, Sr, Ba, Mn) in <1, 1-51, and >51 ?m size fractions, in-water optics, neutrally buoyant sediment trap (NBST) fluxes, and zooplankton data were intercompared. MULVFS total C org and C-Star particle beam attenuation coefficient ( C P) were consistently related at both sites with a 27 ?M m -1 conversion factor. At K2, C P profiles further showed a multitude of transient spikes throughout the water column and spike abundance profiles closely paralleled the double peaked abundance profiles of zooplankton. Also at K2, copepods contributed ˜40% and 10%, night and day, respectively to >51 ?m C org of MULVFS samples in the mixed layer, but few copepods were collected in deeper waters; however, non-swimming radiolarians were quantitatively sampled. A recent hypothesis regarding POC differences between pumps and bottles is examined in light of these results. Particulate >51 ?m C org, N, and P at both ALOHA and K2 showed strong attenuation with depth at both sites. Notable at ALOHA were unusually high levels of >51 ?m Sr (up to 4 nM) in the mixed layer, a reflection of high abundances of SrSO 4 precipitating Acantharia. Notable at K2 were major changes in water column inventories of many particulate components to 700 m over 10 days. Carbon mass balance, with the consideration of particle inventory changes included, indicated that over 98% and 96% of primary produced C org was remineralized shallower than 500 m at ALOHA and K2, respectively. Production of CaCO 3 was estimated to be ˜0.06, 0.89, and 0.02 mmol m -2 d -1 at ALOHA and at K2 during two separate week long study periods, respectively. Similarly, Si production was estimated to be ˜0.08, 10.7, and 4.2 mol m -2 d -1. An estimated 50% and 65% of produced Si was remineralized by 500 m at ALOHA and K2, respectively. Little carbonate dissolution was seen in the upper 500 m at ALOHA, a reflection of 400% super saturation of surface waters and the 700 m deep saturation horizon. Over 92% of produced CaCO 3 was dissolved shallower than 500 m at K2 and biological enhancement of dissolution was readily apparent in waters above the 200 m calcite saturation horizon.

  11. A multi-zone chemistry mapping approach for direct numerical simulation of auto-ignition and flame propagation in a constant volume enclosure

    Microsoft Academic Search

    M. Jangi; R. Yu; X. S. Bai

    2012-01-01

    A direct numerical simulation (DNS) coupling with multi-zone chemistry mapping (MZCM) is presented to simulate flame propagation and auto-ignition in premixed fuel\\/air mixtures. In the MZCM approach, the physical domain is mapped into a low-dimensional phase domain with a few thermodynamic variables as the independent variables. The approach is based on the fractional step method, in which the flow and

  12. A multi-zone chemistry mapping approach for direct numerical simulation of auto-ignition and flame propagation in a constant volume enclosure

    Microsoft Academic Search

    M. Jangi; R. Yu; X. S. Bai

    2011-01-01

    A direct numerical simulation (DNS) coupling with multi-zone chemistry mapping (MZCM) is presented to simulate flame propagation and auto-ignition in premixed fuel\\/air mixtures. In the MZCM approach, the physical domain is mapped into a low-dimensional phase domain with a few thermodynamic variables as the independent variables. The approach is based on the fractional step method, in which the flow and

  13. The trace and Pb isotope chemistry of the Jan Mayen Fracture Zone and the extinct Aegir Ridge

    NASA Astrophysics Data System (ADS)

    Sayit, K.; Hanan, B. B.; Ito, G.; Howell, S. M.; Vogt, P. R.; Breivik, A. J.; Mjelde, R.; Pedersen, R.

    2012-12-01

    The extinct Aegir Ridge (AR) was active during the early opening of the N-Atlantic, 54 to 25 Ma, when spreading jumped to the Kolbeinsey Ridge. Crustal thickness produced by the AR is low (3.5 to 6 km), and the magmatically starved Norway Basin appears as a hole in the surrounding excess volcanism of the Iceland hotspot. Two possible alternatives are; either the lithospheric structure of the Jan Mayen micro-continent (JMMC) blocked the plume flow to the AR, and/or Iceland plume material reaching the ridge experienced a previous melt extraction, leading to relatively low melt production. We report the trace element and Pb isotope systematics of the mafic rocks dredged from the AR ~64-69° N and adjacent Jan Mayen FZ. On the basis of the immobile trace element chemistry, several groups are identified, with a large range of Zr/Nb (2.7-60.7). A very-depleted group ([Ce/Yb]N = 0.3) was found in the Jan Mayen FZ, while the most enriched, OIB-like group ([Ce/Yb]N = 12.4) was recovered from the ridge flank scarps. A notable feature of the Aegir samples is variable Th enrichment relative Nb (Th/Nb = 0.07-0.49), similar to subduction zone signatures. In terms of Pb isotopes, the samples show significant variations that correlate with trace element chemistry (206Pb/204Pb: 207Pb/204Pb: 208Pb/204Pb = 16.63-18.81:15.16-15.55:36.67-38.62). The Pb systematics of the Aegir rocks are compatible with a three-component mixing model with mixing trends between the C-like Iceland plume component and a mixture that is composed of EM-1-type material and depleted MORB asthenosphere. The presence of the C-like isotope compositions in the Aegir samples from the Jan Mayen FZ and ridge flank scarps suggests that Iceland plume material has been tapped. However, the very-depleted trace element signatures indicate that the plume component was previously melt depleted. Apparently, the JMMC impeaded flow of enriched plume material to the AR. The Aegir rocks Pb isotope signature may represent pollution of the NA MORB source, during early opening of the ocean basin, by material dispersed during interaction of the Iceland plume and the continental lithosphere.

  14. A synoptic view of the distribution and connectivity of the mid-crustal low velocity zone beneath Tibet

    NASA Astrophysics Data System (ADS)

    Yang, Y.; Zheng, Y.; Xie, Z.; Ritzwoller, M. H.

    2011-12-01

    The Tibetan Plateau results from the convergence between the Indian and Eurasian plates. However, the physical processes that have controlled the deformation history of Tibet, particularly the potential localization of deformation either in the vertical or horizontal directions remain subject to debate. There are a growing list and wide variety of observations that suggest that the Tibetan crust is warm and presumably ductile. Some of observations are often taken as prima facie evidence for the existence of partial melt or aqueous fluids in the middle or deep crust beneath Tibet and in some cases for the decoupling or partitioning of strain between the upper crust and uppermost mantle. However, most of this evidence is highly localized along nearly linear seismic or magneto-telluric profiles. This motivates the two questions addressed by this study. First, how pervasive across Tibet are the phenomena on which inferences of the existence of crustal partial melt rest? In particular, how pervasive are mid-crustal low velocity zones across Tibet? Second, what is the geometry or inter-connectivity of the crustal low velocity zones observed across Tibet? In this study, we address these questions by producing a new 3-D model of crustal and uppermost mantle shear wave speeds inferred from Rayleigh wave dispersion observed on cross-correlations of long time series of ambient seismic noise. Broadband seismic data from about 600 stations (Chinese Provincial networks, FDSN, several PASSCAL experiments including the INDEPTH IV experiment) yield about 50,000 inter-station paths, which are used to generate Rayleigh wave phase velocity maps from 10 sec to 50 sec period. The time series lengths in the cross-correlations range from 1 to 2 years in duration. The resulting Rayleigh wave phase velocity maps are inverted for a 3D Vsv model of crustal and upper most mantles. The major results from our model are summarized below: (1) A crustal LVZ exists across most of the high Tibetan Plateau. (2) The distribution of the amplitude of the LVZ is not uniform. In fact, the largest amplitudes (i.e., lowest mid-crustal shear wave speeds) are found predominantly around the periphery of Tibet. (3) The lateral distribution of strong LVZs are coincident with the distribution of strong radial anisotropy in the middle crust, suggesting LVZs of Vsv in the middle crust may be mostly due to the strong radial anisotropy rather than the presence of partial melt or aqueous fluids.

  15. Effects of low-level radioactive-waste disposal on water chemistry in the unsaturated zone at a site near Sheffield, Illinois, 1982-84

    USGS Publications Warehouse

    Peters, C.A.; Striegl, R.G.; Mills, P.C.; Healy, R.W.

    1992-01-01

    A 1982-84 field study defined the chemistry of water collected from the unsaturated zone at a low-level radioactive-waste disposal site near Sheffield, Bureau County, Illinois. Chemical data were evaluated to determine the principal naturally occurring geochemical reactions in the unsaturated zone and to evaluate waste-induced effects on pore-water chemistry. Samples of precipitation, unsaturated-zone pore water, and saturated-zone water were analyzed for specific conductance, pH, alkalinity, major cations and anions, dissolved organic carbon, gross alpha and beta radiation, and tritium. Little change in concentration of most major constituents in the unsaturated-zone water was observed with respect to depth or distance from disposal trenches. Tritium and dissolved organic carbon concentrations were, however, dependent on proximity to trenches. The primary reactions, both on- site and off-site, were carbonate and clay dissolution, cation exchange, and the oxidation of pyrite. The major difference between on-site and off-site inorganic water chemistry resulted from the removal of the Roxana Silt and the Radnor Till Member of the Glasford Formation from on-site. Off-site, the Roxana Silt contributed substantial quantities of sodium to solution from montmorillonite dissolution and associated cation-exchange reactions. The Radnor Till Member provided exchange surfaces for magnesium. Precipitation at the site had an ionic composition of calcium zinc sulfate and an average pH of 4.6. Within 0.3 meter of the land surface, infiltrating rain water or snowmelt changed to an ionic canposition of calcium sulfate off-site and calcium bicarbonate on-site and had an average pH of 7.9; below that depth, pH averaged 7.5 and the ionic composition generally was calcium magnesium bicarbonate. Alkalinity and specific conductance differed primarily according to composition of geologic materials. Tritium concentrations ranged from 0.2 (detection limit) to 1,380 nanocuries per liter. The methods of constructing, installing, and sampling with lysimeters were evaluated to ensure data reliability. These evaluations indicate that, with respect to most constituents, the samples retrieved from the lysimeters accurately represented pore-water chemistry.

  16. Effects of low-level radioactive-waste disposal on water chemistry in the unsaturated zone at a site near Sheffield, Illinois, 1982-84

    USGS Publications Warehouse

    Peters, C.A.; Striegl, R.G.; Mills, P.C.; Healy, R.W.

    1992-01-01

    A 1982-84 field study defined the chemistry of water collected from the unsaturated zone at a low-level radioactive-waste disposal site near Sheffield, Bureau County, Ill. Chemical data were evaluated to determine the principal, naturally occurring geochemical reactions in the unsaturated zone and to evaluate waste-induced effects on pore-water chemistry. Samples of precipitation, unsaturated-zone pore water, and saturated-zone water were analyzed for specific conductance, pH, alkalinity, major cations and anions, dissolved organic carbon, gross alpha and beta radiation, and tritium. Little change in concentration of most major constituents in the unsaturated-zone water was observed with respect to depth or distance from disposal trenches. Tritium and dissolved organic carbon concentrations were, however, dependent on proximity to trenches. The primary reactions, both on-site and off-site, were carbonate and clay dissolution, cation exchange, and the oxidation of pyrite. The major difference between on-site and off-site inorganic water chemistry resulted from the removal of the Roxana Silt and the Radnor Till Member of the Glasford Formation from on-site. Off-site, the Roxana Silt contributed substantial quantities of sodium to solution from montmorillonite dissolution and associated cation-exchange reactions. The Radnor Till Member provided exchange surfaces for magnesium. Precipitation at the site had an ionic composition of calcium zinc sulfate and an average pH of 4.6. Within 0.3 meter of the land surface, infiltrating rainwater or snowmelt changed to an ionic composition of calcium sulfate off-site and calcium bicarbonate on-site and had an average pH of 7.9; below that depth, pH averaged 7.5 and the ionic composition generally was calcium magnesium bicarbonate. Alkalinity and specific conductance differed primarily according to composition of geologic materials. Tritium concentrations ranged from 0.2 (detection limit) to 1,380 nanocuries per liter. The methods of constructing, installing, and sampling with lysimeters were evaluated to ensure data reliability. These evaluations indicate that, with respect to most constituents, the samples retrieved from the lysimeters accurately represented pore-water chemistry.

  17. Fluid chemistry and evolution of hydrothermal fluids in an Archaean transcrustal fault zone network: The case of the Cadillac Tectonic Zone, Abitibi greenstone belt, Canada

    USGS Publications Warehouse

    Neumayr, P.; Hagemann, S.G.; Banks, D.A.; Yardley, B.W.D.; Couture, J.-F.; Landis, G.P.; Rye, R.

    2007-01-01

    Detailed fluid geochemistry studies on hydrothermal quartz veins from the Rouyn-Noranda and Val-d'Or areas along the transcrustal Cadillac Tectonic Zone (CTZ) indicate that unmineralized (with respect to gold) sections of the CTZ contained a distinct CO2-dominated, H2S-poor hydrothermal fluid. In contrast, both gold mineralized sections of the CTZ (e.g., at Orenada #2) and associated higher order shear zones have a H2O-CO2 ?? CH4-NaCl hydrothermal fluid. Their CO2/H2S ratios indicate H2S-rich compositions. The Br/Cl compositions in fluid inclusions trapped in these veins indicate that hydrothermal fluids have been equilibrated with the crust. Oxygen isotope ratios from hydrothermal quartz veins in the CTZ are consistently 2??? more enriched than those of associated higher order shear zones, which are interpreted to be a function of greater fluid/rock ratios in the CTZ and lower fluid/rock ratios, and more efficient equilibration of the hydrothermal fluid with the wall rock, in higher order shear zones. An implication from this study is that the lower metal endowment of the transcrustal CTZ, when compared with the higher metal endowment in higher order shear zones (ratio of about 1 : 1000), may be the result of the lack of significant amounts of H2O-H2S rich fluids in most of the CTZ. In contrast, gold mineralization in the higher order shear zones appear to be controlled by the high H2S activity of the aqueous fluids, because gold was likely transported in a bisulfide complex and was deposited during sulfidation reactions in the wall rock and phase separation in the quartz veins. ?? 2007 NRC Canada.

  18. Increased mortality of fish due to changing Al-chemistry of mixing zones between limed streams and acidic tributaries

    Microsoft Academic Search

    A. B. S. Poléo; E. Lydersen; B. O. Rosseland; F. Kroglund; B. Salbu; R. D. Vogt; A. Kvellestad

    1994-01-01

    The present study is mainly focusing on mortality variations of fish due to changing Alchemistry of mixing zones. An artificial mixing zone was made by pumping water from a limed stream and an acidic tributary into a mixing channel. Atlantic salmon (Salmo salar L.) parr were exposed to the mixed water, limed stream water, and acidic tributary water. Mortality, blood

  19. Water Planets in the Habitable Zone: Atmospheric Chemistry, Observable Features, and the case of Kepler-62e and -62f

    E-print Network

    Kaltenegger, L; Rugheimer, S

    2013-01-01

    Water planets in the habitable zone are expected to have distinct geophysics and geochemistry of their surfaces and atmospheres. We explore these properties motivated by two key questions: whether such planets could provide habitable conditions and whether they exhibit discernable spectral features that distinguish a water planet from a rocky Earth-like planet. We show that the recently discovered planets Kepler-62e and -62f are the first viable candidates for habitable zone water planet. We use these planets as test cases for discussing those differences in detail. We generate atmospheric spectral models and find that potentially habitable water planets show a distinctive spectral fingerprint in transit depending on their position in the habitable zone.

  20. Nutrient transfer between the root zones of soybean and maize plants connected by a common mycorrhizal mycelium

    Microsoft Academic Search

    Gabor J. Bethlenfalvay; Maria G. Reyes-Solis; Susan B. Camel; Ronald Ferrera-Cerrato

    1991-01-01

    The objective of the study was to determine whether nutrient fluxes mediated by hyphae of vesicular-arbuscular myeorrhizal (VAM) fungi between the root zones of grass and legume plants differ with the legume's mode of N nutrition. The plants, nodulating or nonnodulating isolines of soybean (Glycine max (L.) Merr.J, were grown in association with a dwarf maize (Zea mays L.) eultivar

  1. ANNUAL REPORT. DNAPL SURFACE CHEMISTRY: ITS IMPACT ON DNAPL DISTRIBUTION IN THE VADOSE ZONE AND ITS MANIPULATION TO ENHANCE REMEDIATION

    EPA Science Inventory

    The primary hypothesis of this work is that surface-active chemicals and/or microorganisms present in the unsaturated zone can significantly alter interfacial phenomena governing the migration of DNAPLs, thereby affecting the accessibility of a DNAPL during remediation efforts. T...

  2. An autoradiographic analysis of the cortical connections of the pallidal and cerebellar zones within the feline motor thalamus

    SciTech Connect

    Wensel, J.P.

    1989-01-01

    The feline motor thalamus relays both basal ganglia and cerebellar inputs to the motor cortex. This complex is classically subdivided into three nuclei: the ventroanterior nucleus (VA), the ventrolateral nucleus (VL), and the ventromedial nucleus (VM). Poor correlation between recognized patterns of cortical and subcortical connectivity and traditional boundaries used to distinguish these nuclei complicate the elucidation of the role they play in the elaboration of motor behavior. The recent demonstration of complementarity for the pallidothalamic and dentatothalamic projections to the motor thalamus of the cat provided the foundation for a revision of these nuclear borders to reflect differences in subcortical connectivity. Using a revised topography, this study analyzed the afferent and efferent connections of the feline VA and VL through the application of both anterograde and retrograde tracing techniques. The extent of the cerebellothalamic projection, as revealed by the bidirectional transport of WGA-HRP, was used to demarcate the boundary between VA and VL. Injections of tritiated amino acids into VA and VL allowed for the autoradiographic tracing of their cortical projections. Autoradiography was also used to demonstrate the distributions of corticothalamic projections from selected pericruciate and posterior parietal subfields to the motor thalamus.

  3. Limits to magma mixing based on chemistry and mineralogy of pumice fragments erupted from a chemically zoned magma body

    SciTech Connect

    Vogel, T.A.; Ryerson, F.J.; Noble, D.C.; Younker, L.W.

    1987-09-01

    The chemical variation among pumice fragments from the Pahute Mesa Member of the Thirsty Canyon Tuff (Black Mountain volcanic center, southwestern Nevada) is consistent with magma withdrawal from a chemically zoned magma body. The top of this magma body contained little chemical variations, the lowest concentration of light REEs, and the highest concentrations of SiO/sub 2/, heavy REEs, and Th. The pumice fragments derived from the top of the magma body contain nearly pure ferrohedenbergite and fayalite. The next discrete zone in the magma body contained lower SiO/sub 2/, heavy REEs, and Th concentrations, and very high concentrations of light REEs. The lowest erupted layer contained relatively low concentrations of SiO/sub 2/, Th, and light and heavy REEs. Pumice fragments with polymodal disequilibrium phenocryst populations are a priori evidence of magma mixing. The magma mixing process is constrained by: the systematic vertical distribution of chemically distinct pumice fragments throughout the ash-flow sheet; the presence of disequilibrium phenocrysts within some pumice fragments in all but the lowermost part of the sheet; and the presence of compositionally uniform glass in most pumice fragments, including those with widely varying phenocryst compositions. Negligible mixing occurred at the top of the magma body; limited mixing occurred in the second and third layers. Because mixing did not destroy the original layering, the amount of guest magma must have been small. In order for unzoned disequilibrium phenocrysts to not become zoned, they must have been preserved in the magma body only a short time. And yet, in order to produce the homogeneous liquid that surrounds these phenocrysts, mechanical mixing must have been very efficient. 44 references.

  4. Spatial Heterogeneity of Stream Water Chemistry in the Elder Creek Catchment at the Eel River Critical Zone Observatory.

    NASA Astrophysics Data System (ADS)

    Thurnhoffer, B. M.; Lovill, S. M.; Nghiem, A.; Kim, H.; Bishop, J. K. B.

    2014-12-01

    How does stream chemistry vary with respect to discharge, flow distance, elevation, hill slope orientation, lithology, and vegetation on catchment scale? Is it possible to discern fast flowing seasonally recharged subsurface waters from long residence time waters contributing to base flow? To answer these questions, water samples were collected at ~80 locations distributed over the channel network of the (17 km2) Elder Creek catchment during surveys in May and August/September 2014. The site, located at the Angelo Coast Range Reserve near the headwaters of the South Fork of the Eel River in northern California, experiences a Mediterranean climate with warm dry summers and cold wet winters; this year (2014), our area has received less than 50% of expected precipitation and is experiencing an extreme drought. Our survey times correspond to the beginning of the dry season and late dry season, respectively. The subsurface lithology of the region almost uniform, being largely composed of argillite mudstone with intermittent areas underlain with sandstone. It is forested with Douglas fir, live and tan oaks, madrone and California bay laurel, which vary in abundance with hill-slope orientation. Due to drought, the Elder Catchment has recently experienced the effects of the nearby Lodge Lightening Complex Fire (first detection July 31 2014) and its effects may be differentiated through the continuous 1 - 3 day frequency sampling of Elder Creek water using the ISCO Gravity Filtration System (GFS; Kim et al. 2012, EST). All water samples are analyzed for dissolved major, minor, and trace solutes by Inductively Couple Plasma Mass Spectrometry and this report focuses on major solutes such as Na, K, Ca, Mg and Si; redox sensitive metals Fe and Mn; and Ba and Sr. Preliminary analysis of May 2014 data shows interesting patterns between tributaries, particularly differences between streams on north vs. south facing slopes. Concentrations of Ca, Mg, and Na decrease down slope in south facing tributaries, while they slightly increase downslope in north facing tributaries. Concentrations are relatively invariant in the Elder channel but Elder chemistry differs with respect to Na, Ca and Fe to the South Fork Eel River.

  5. The effects of rock type and landscape position on solution chemistry of soils in the Biosphere 2 Desert Site of the Santa Catalina Mountains Critical Zone Observatory

    NASA Astrophysics Data System (ADS)

    Penprase, S. B.; Abramson, N.; LaSharr, K.; Chorover, J.

    2014-12-01

    The interaction of near surface soil water with surrounding rock and soil matter plays a crucial role in determining the chemical composition of biogeological systems. This interaction drives subsurface processes such as erosion, mineralization, and depletion. However, how and why soil pore water chemistry fluctuates based on localized conditions such as rock type and landscape position is not fully understood. This study examines the role these two factors play in altering soil water chemistry by analyzing samples collected from schist and granite field sites within the Biosphere 2 Desert Site of the Santa Catalina Mountains Critical Zone Observatory. We hypothesized that soil water from the schist site would have higher solute concentrations than the granite site because schist is a more weatherable rock and, thus, is more susceptible to chemical erosion. We also hypothesized that soil water from convergent positions would have higher solute concentrations than those from divergent positions due to a longer upgradient flow path. Each field site was situated within a Zero Order Basin (ZOB) with seven Zero Tension Lysimeters (ZTL). At the schist site, there were 3 convergent (SC 1-3) and 4 divergent (SD 1-4) ZTL positions. For the granite site, there were 4 convergent (GC 1-2, 4-5) and 3 divergent (GD 1-3) ZTLs. Samples were collected following rainstorms from July 2011-July 2013. Each solution sample was analyzed for major and trace cations, anions, pH, EC, and organic and inorganic carbon. Comparisons between SC and GC and all schist and all granite are consistent with the hypotheses for multiple elements. Results also indicate higher solute levels for SC relative to SD. Thus, our analyses suggest that rock type and landscape position influence the chemical composition of soil water at these two sites.

  6. Chemistry 321 Organic Chemistry

    E-print Network

    Wagner, Diane

    Chemistry 321 Organic Chemistry Fall 2010 MWF 1:00-2:00 Reichardt Bldg 202 Instructor: Thomas Dept.) Office Hours: By appointment Required Materials: Organic Chemistry 7th Ed., J. McMurry, Brooks/Cole OWL card RF classroom clicker Recommended: Study Guide & Solutions Manual for Org Chemistry HGS

  7. CHEMISTRY 11500 General Chemistry

    E-print Network

    Jiang, Wen

    CHEMISTRY 11500 General Chemistry Spring 2014 Professor Dr. John J. Nash; BRWN 4103C; phone: 494.edu (Lab) Required Course Materials Chemistry: The Molecular Nature of Matter and Change, 6th Ed., by M. S. Silberberg, McGraw-Hill, 2012. Chemistry 11500 Laboratory Manual, 2013-2014, Hayden-McNeil Publishing, Inc

  8. Renewable liquid reflecting zone plate

    SciTech Connect

    Toor, Arthur; Ryutov, Dmitri D.

    2003-12-09

    A renewable liquid reflecting zone plate. Electrodes are operatively connected to a dielectric liquid in a circular or other arrangement to produce a reflecting zone plate. A system for renewing the liquid uses a penetrable substrate.

  9. Department of Chemistry & Biochemistry UCLA Chemistry, Biochemistry & Chemistry Material Science

    E-print Network

    Levine, Alex J.

    ..............................................................................................................................................................11 Physical Chemistry ConcentrationDepartment of Chemistry & Biochemistry UCLA Chemistry, Biochemistry & Chemistry Material Science ...........................................................................................................................................4 Chemistry & Biochemistry Undergraduate Office

  10. The Teggiolo zone: a key to the Helvetic–Penninic connection (stratigraphy and tectonics in the Val Bavona, Ticino, Central Alps)

    Microsoft Academic Search

    Battista Matasci; Jean-Luc Epard; Henri Masson

    The Teggiolo zone is the sedimentary cover of the Antigorio nappe, one of the lowest tectonic units of the Penninic Central\\u000a Alps. Detailed mapping, stratigraphic and structural analyses, and comparisons with less metamorphic series in several well-studied\\u000a domains of the Alps, provide a new stratigraphic interpretation. The Teggiolo zone is comprised of several sedimentary cycles,\\u000a separated by erosive surfaces and

  11. Hydrogeology, Water Chemistry, and Factors Affecting the Transport of Contaminants in the Zone of Contribution of a Public-Supply Well in Modesto, Eastern San Joaquin Valley, California

    USGS Publications Warehouse

    Jurgens, Bryant C.; Burow, Karen R.; Dalgish, Barbara A.; Shelton, Jennifer L.

    2008-01-01

    Ground-water chemistry in the zone of contribution of a public-supply well in Modesto, California, was studied by the U.S. Geological Survey National Water Quality Assessment (NAWQA) Program's topical team for Transport of Anthropogenic and Natural Contaminants (TANC) to supply wells. Twenty-three monitoring wells were installed in Modesto to record baseline hydraulic information and to collect water-quality samples. The monitoring wells were divided into four categories that represent the chemistry of different depths and volumes of the aquifer: (1) water-table wells were screened between 8.5 and 11.7 m (meter) (28 and 38.5 ft [foot]) below land surface (bls) and were within 5 m (16 ft) of the water table; (2) shallow wells were screened between 29 and 35 m (95 and 115 ft) bls; (3) intermediate wells were screened between 50.6 and 65.5 m (166 and 215 ft) bls; and (4) deep wells are screened between 100 to 106 m (328 and 348 ft) bls. Inorganic, organic, isotope, and age-dating tracers were used to characterize the geochemical conditions in the aquifer and understand the mechanisms of mobilization and movement of selected constituents from source areas to a public-supply well. The ground-water system within the study area has been significantly altered by human activities. Water levels in monitoring wells indicated that horizontal movement of ground water was generally from the agricultural areas in the northeast towards a regional water-level depression within the city in the southwest. However, intensive pumping and irrigation recharge in the study area has caused large quantities of ground water to move vertically downward within the regional and local flow systems. Analysis of age tracers indicated that ground-water age varied from recent recharge at the water table to more than 1,000 years in the deep part of the aquifer. The mean age of shallow ground water was determined to be between 30 and 40 years. Intermediate ground water was determined to be a mixture of modern (Post-1950) and old (Pre-1950) ground water. As a result, concentrations of age tracers were detectable but diluted by older ground water. Deep ground water generally represented water that was recharged under natural conditions and therefore had much older ages. Ground water reaching the public-supply well was a mixture of older intermediate and deep ground water and young shallow ground water that has been anthropogenically-influenced to a greater extent than intermediate ground water. Uranium and nitrate pose the most significant threat to the quality of water discharged from the public-supply well. Although pesticides and VOCs were present in ground water from the public-supply well and monitoring wells, currently concentrations of these contaminants are generally less than one-hundredth the concentration of drinking water standards. In contrast, both uranium and nitrate were above half the concentration of drinking water standards for public-supply well samples, and were above drinking water standards for several water-table and shallow monitoring wells. Shallow ground water contributes roughly 20 percent of the total flow to the public-supply well and was the entry point of most contaminants reaching the public-supply well. Naturally-occurring uranium, which is commonly adsorbed to aquifer sediments, was mobilized by oxygen-rich, high-alkalinity water, causing concentrations in some monitoring wells to be above the drinking-water standard of 30 ug/L (microgram per liter). Adsorption experiments, sediment extractions, and uranium isotopes indicated uranium in water-table and shallow ground water was leached from aquifer sediments. Uranium is strongly correlated to bicarbonate concentrations (as measured by alkalinity) in ground water. Bicarbonate can effectively limit uranium adsorption to sediments. As a result, continued downward movement of high-alkalinity, oxygen-rich ground water will likely lead to larger portions of the aquifer having

  12. Chemistry 417 PHYSICAL CHEMISTRY LABORATORY

    E-print Network

    Richmond, Geraldine L.

    Chemistry 417 PHYSICAL CHEMISTRY LABORATORY Fall, 2008 Lecture: 13:00 Tuesday and Thursday 331 Senning tba 174 Klamath Required Texts: Chemistry 417: Physical Chemistry Laboratory - University.b.: This text is also used in Chemistry 429 Applied Mathematics for Physical Chemistry by James R. Barrante

  13. Groundwater Hydrology and Chemistry in and near an Emulsified Vegetable-Oil Injection Zone, Solid Waste Management Unit 17, Naval Weapons Station Charleston, North Charleston, South Carolina, 2004-2009

    USGS Publications Warehouse

    Vroblesky, Don A.; Petkewich, Matthew D.; Lowery, Mark A.; Conlon, Kevin J.; Casey, Clifton C.

    2010-01-01

    The U.S. Geological Survey and the Naval Facilities Engineering Command Southeast investigated the hydrology and groundwater chemistry in the vicinity of an emulsified vegetable-oil injection zone at Solid Waste Management Unit (SWMU) 17, Naval Weapons Station Charleston, North Charleston, South Carolina. In May 2004, Solutions-IES initiated a Phase-I pilot-scale treatability study at SWMU17 involving the injection of an edible oil emulsion into the aquifer near wells 17PS-01, 17PS-02, and 17PS-03 to treat chlorinated solvents. The Phase-I injection of emulsified vegetable oil resulted in dechlorination of trichloroethene (TCE) to cis-1,2-dichloroethene (cDCE), but the dechlorination activity appeared to stall at cDCE, with little further dechlorination of cDCE to vinyl chloride (VC) or to ethene. The purpose of the present investigation was to examine the groundwater hydrology and chemistry in and near the injection zone to gain a better understanding of the apparent remediation stall. It is unlikely that the remediation stall was due to the lack of an appropriate microbial community because groundwater samples showed the presence of Dehalococcoides species (sp.) and suitable enyzmes. The probable causes of the stall were heterogeneous distribution of the injectate and development of low-pH conditions in the injection area. Because groundwater pH values in the injection area were below the range considered optimum for dechlorination activity, a series of tests was done to examine the effect on dechlorination of increasing the pH within well 17PS-02. During and following the in-well pH-adjustment tests, VC concentrations gradually increased in some wells in the injection zone that were not part of the in-well pH-adjustment tests. These data possibly reflect a gradual microbial acclimation to the low-pH conditions produced by the injection. In contrast, a distinct increase in VC concentration was observed in well 17PS-02 following the in-well pH increase. Adjustment of the pH to near-neutral values in well 17PS-02 may have made that well relatively favorable to VC production compared with much of the rest of the injection zone, possibly accounting for acceleration of VC production at that well. Following a Phase-II injection in which Solutions-IES, Inc., injected pH-buffered emulsified vegetable oil with an improved efficiency injection approach, 1,1-dichloroethene, TCE, and cDCE rapidly decreased in concentration and are now (2009) undetectable in the injection zone, with the exception of a low concentration (43 micrograms per liter, August 2009) of cDCE in well 17PS-01. In August 2009, VC was still present in groundwater at the test wells in concentrations ranging from 150 to 640 micrograms per liter. The Phase-II injection, however, appears to have locally decreased aquifer permeability, possibly resulting in movement of contamination around, rather than through, the treatment area.

  14. Chemistry 675 Advanced Organic Chemistry

    E-print Network

    Doyle, Robert

    Fall 2014 Chemistry 675 Advanced Organic Chemistry MWF 10:35-11:30 AM 200 LSB Professor John D Description: CHE675 is a graduate-level organic chemistry course focused on physical organic chemistry, which in my office (CST 4-006) or my mailbox in the chemistry office (CST 1-014). Late problem sets will have

  15. Introductory Chemistry Workshop Spring 2014

    E-print Network

    Nickrent, Daniel L.

    CHEM 212 Introductory Chemistry Workshop Spring 2014 Required Materials Martin S. Silberberg (2013) Principles of General Chemistry, 3nd edition, McGraw-Hill. CONNECT subscription Non-programmable scientific for CHEM 212. The last day to add a course without a Dean's signature is Sun. August 25th. Grading

  16. Chemistry of unsaturated zone gases sampled in open boreholes at the crest of Yucca Mountain, Nevada: Data and basic concepts of chemical and physical processes in the mountain

    USGS Publications Warehouse

    Thorstenson, D.C.; Weeks, E.P.; Haas, H.; Busenberg, E.; Plummer, L.N.; Peters, C.A.

    1998-01-01

    Boreholes open to the unsaturated zone at the crest of Yucca Mountain, Nevada, were variously sampled for CO2 (including 13C and 14C), CH4, N2, O2, Ar, CFC-11, CFC12, and CFC-113 from 1986 to 1993. Air enters the mountain in outcrops, principally on the eastern slope, is enriched in CO2 by mixing with soil gas, and is advected to the mountain crest, where it returns to the atmosphere. The CFC data indicate that travel times of the advecting gas in the shallow Tiva Canyon hydrogeologic unit are ???5 years. The 14C activities are postbomb to depths of 100 m, indicating little retardation of 14CO2 in the shallow flow systems. The 14C activities from 168 to 404 m in the Topopah Spring hydrogeologic unit are 85-90 pMC at borehole USW-UZ6. The CFC data show that the drilling of USW-UZ6 in 1984 has altered the natural system by providing a conduit through the Paintbrush Nonwelded unit, allowing flow from Topopah Spring outcrops in Solitario Canyon on the west to USW-UZ6, upward in the borehole through the Paintbrush, to the shallow Tiva Canyon flow systems, and out of the mountain.

  17. for Undergraduate CHEMISTRY MAJORS

    E-print Network

    Stuart, Steven J.

    and Petroleum Chemistry, Organic Chemistry, Physical Chemistry, Polymer Chemistry, Pulp and Paper Chemistry, RHANDBOOK for Undergraduate CHEMISTRY MAJORS DEPARTMENT OF CHEMISTRY Fall 2010 #12;#12;TABLE OF CONTENTS A Career in Chemistry - What It Means ___________________________________________ 4 What do

  18. CHEMISTRY 521 GRADUATE PHYSICAL CHEMISTRY

    E-print Network

    Findley, Gary L.

    CHEMISTRY 521 GRADUATE PHYSICAL CHEMISTRY Fall Term, 1999 INSTRUCTOR INFORMATION Instructor: Dr@alpha.nlu.edu URL: http://www.nlu.edu/chemistry/findley/findley.html COURSE Content: A review of selected topics in Physical Chemistry. Goals/ Objectives: Introduction to quantum mechanics. Topics covered include

  19. CHEMISTRY 320 PHYSICAL CHEMISTRY I

    E-print Network

    Findley, Gary L.

    CHEMISTRY 320 PHYSICAL CHEMISTRY I Fall 2009 9:00 am - 10:30 am, MW CNSB 211 INSTRUCTOR INFORMATION of the physical principles of chemistry. Goals/ Objectives: CHEM 320 presents chemical principles from" or better in CHEM 108; PHYS 208; MATH 132. Text: Physical Chemistry, P. Atkins and J. de Paula, 8th ed. (W

  20. Environmental Chemistry II (Atmospheric Chemistry)

    E-print Network

    Dibble, Theodore

    SYLLABUS FOR Environmental Chemistry II (Atmospheric Chemistry) FCH 511 Fall 2013 Theodore S. Dibble Professor of Chemistry 421 Jahn Laboratory Syracuse, NY 13210 Phone: (315) 470-6596 Fax: (315) 470 Seinfeld, J. H. and Pandis, S. N. Atmospheric Chemistry and Physics: From Air Pollution to Climate Change

  1. CHEMISTRY 322 PHYSICAL CHEMISTRY II

    E-print Network

    Findley, Gary L.

    CHEMISTRY 322 PHYSICAL CHEMISTRY II Spring 2010 10:00 am - 11:30 am, MW CNSB 211 INSTRUCTOR interpretations of the physical principles of chemistry. Goals/ Objectives: CHEM 322, which is a continuation of CHEM 320, focuses of the quantum theoretical foundations of modern chemistry. Topics covered include

  2. Chemistry 419 PHYSICAL CHEMISTRY LABORATORY

    E-print Network

    Richmond, Geraldine L.

    Chemistry 419 PHYSICAL CHEMISTRY LABORATORY Spring, 2008 Lecture/Discussion 1:00 Tuesday, Brittney Young Required Text: Chemistry 419 - Physical Chemistry Laboratory - University Bookstore. Students are required to perform seven laboratories from among those offered this quarter. The first week

  3. Green Chemistry

    NSDL National Science Digital Library

    2002-01-01

    This special feature page from the American Chemical Society (ACS) showcases the up-and-coming field of "green chemistry," that is, the development of chemical products and processes that eliminate or reduce the use and generation of hazardous substances. A list of principles behind green chemistry, a searchable bibliography of green chemistry references, green chemistry links (including conferences), and an online preview of the ACS-published book Real-World Cases in Green Chemistry are all found at the site. Five video clips on green chemistry from the standpoint of academia, industry, and small business are also featured (Windows Media Player). This page comes from ACS's Green Chemistry Project, a three-year educational project to develop and disseminate green chemistry educational materials for graduate and undergraduate chemistry students. Check back often for updates.

  4. Science Connects

    NSDL National Science Digital Library

    Science Connects has been chosen to run the STEMNET program for the West of Scotland, and their work will be of great interest to science educators. The STEM ambassador program is what distinguishes the STEMNET program from other STEM programs. The UK-wide program works with "volunteers from a wide range of disciplines, such as forensic science, geology, mechanical engineering, parasitology...etc. who want to share their enthusiasm for their careers to encourage pupils to take an interest in STEM Subjects." The "Case Studies" tab on the left side of any page offers visitors a look at what some ambassadors have done with their field of study. Visitors should check out case study #4, about one Dr. Linda Thomson, who teaches young kids about chemistry and forensics. Visitors will also want to check out case study #9, about Alistair McNeil, who happens to be a health, safety and environment manager who recommends a career in construction. All told, the site is well worth a visit for those interested in promoting STEM education.

  5. ENVIRONMENTAL CHEMISTRY

    EPA Science Inventory

    Environmental chemistry is applied to estimating the exposure of ecosystems and humans to various chemical environmental stressors. Among the stressors of concern are mercury, pesticides, and arsenic. Advanced analytical chemistry techniques are used to measure these stressors ...

  6. Chemistry Notes

    ERIC Educational Resources Information Center

    School Science Review, 1976

    1976-01-01

    Described are eight chemistry experiments and demonstrations applicable to introductory chemistry courses. Activities include: measure of lattice enthalpy, Le Chatelier's principle, decarboxylation of soap, use of pocket calculators in pH measurement, and making nylon. (SL)

  7. Chemistry Notes.

    ERIC Educational Resources Information Center

    School Science Review, 1978

    1978-01-01

    Describes experiments, demonstrations, activities and ideas relating to various fields of chemistry to be used in chemistry courses of secondary schools. Three experiments concerning differential thermal analysis are among these notes presented. (HM)

  8. Forensic Chemistry

    Microsoft Academic Search

    Suzanne Bell

    2009-01-01

    Forensic chemistry is unique among chemical sciences in that its research, practice, and presentation must meet the needs of both the scientific and the legal communities. As such, forensic chemistry research is applied and derivative by nature and design, and it emphasizes metrology (the science of measurement) and validation. Forensic chemistry has moved away from its analytical roots and is

  9. Biochemistry chemistry &

    E-print Network

    Morgan, Stephen L.

    Biochemistry chemistry & A n A ly t i c A l B i o l o g i c A l i n o r g A n i c o r g A n i c P h of South Carolina..........................1 Department of Chemistry and Biochemistry....2 The Graduate Program in Chemistry and Biochemistry.........................................................3 Ph

  10. Chemistry Notes.

    ERIC Educational Resources Information Center

    School Science Review, 1982

    1982-01-01

    Presents background information, laboratory procedures, classroom materials/activities, and experiments for chemistry. Topics include superheavy elements, polarizing power and chemistry of alkali metals, particulate carbon from combustion, tips for the chemistry laboratory, interesting/colorful experiments, behavior of bismuth (III) iodine, and…

  11. Chemistry Links

    NSDL National Science Digital Library

    Charnine, Michael

    This compiled site contains titles and links to over 40 sites, journal articles, course and tutorial materials, simulations, batteries, and other resources. Definitions of chemistry, theoretical chemistry, organic, physical and nuclear chemistry are integrated with the links to outside materials. A number of useful keywords are included to help users navigate the materials.

  12. Fault zone hydrogeology

    NASA Astrophysics Data System (ADS)

    Bense, V. F.; Gleeson, T.; Loveless, S. E.; Bour, O.; Scibek, J.

    2013-12-01

    Deformation along faults in the shallow crust (< 1 km) introduces permeability heterogeneity and anisotropy, which has an important impact on processes such as regional groundwater flow, hydrocarbon migration, and hydrothermal fluid circulation. Fault zones have the capacity to be hydraulic conduits connecting shallow and deep geological environments, but simultaneously the fault cores of many faults often form effective barriers to flow. The direct evaluation of the impact of faults to fluid flow patterns remains a challenge and requires a multidisciplinary research effort of structural geologists and hydrogeologists. However, we find that these disciplines often use different methods with little interaction between them. In this review, we document the current multi-disciplinary understanding of fault zone hydrogeology. We discuss surface- and subsurface observations from diverse rock types from unlithified and lithified clastic sediments through to carbonate, crystalline, and volcanic rocks. For each rock type, we evaluate geological deformation mechanisms, hydrogeologic observations and conceptual models of fault zone hydrogeology. Outcrop observations indicate that fault zones commonly have a permeability structure suggesting they should act as complex conduit-barrier systems in which along-fault flow is encouraged and across-fault flow is impeded. Hydrogeological observations of fault zones reported in the literature show a broad qualitative agreement with outcrop-based conceptual models of fault zone hydrogeology. Nevertheless, the specific impact of a particular fault permeability structure on fault zone hydrogeology can only be assessed when the hydrogeological context of the fault zone is considered and not from outcrop observations alone. To gain a more integrated, comprehensive understanding of fault zone hydrogeology, we foresee numerous synergistic opportunities and challenges for the discipline of structural geology and hydrogeology to co-evolve and address remaining challenges by co-locating study areas, sharing approaches and fusing data, developing conceptual models from hydrogeologic data, numerical modeling, and training interdisciplinary scientists.

  13. Forensic Chemistry

    NASA Astrophysics Data System (ADS)

    Bell, Suzanne

    2009-07-01

    Forensic chemistry is unique among chemical sciences in that its research, practice, and presentation must meet the needs of both the scientific and the legal communities. As such, forensic chemistry research is applied and derivative by nature and design, and it emphasizes metrology (the science of measurement) and validation. Forensic chemistry has moved away from its analytical roots and is incorporating a broader spectrum of chemical sciences. Existing forensic practices are being revisited as the purview of forensic chemistry extends outward from drug analysis and toxicology into such diverse areas as combustion chemistry, materials science, and pattern evidence.

  14. Computational Chemistry for Chemistry Educators

    NSDL National Science Digital Library

    Shodor Computational Science Institute

    This is a 15-session course on the technologies, techniques, and tools of computational chemistry. By using the same computational tools as research computational chemists, educators will have the opportunity to study chemistry in a manner very different than traditional teaching and education in chemistry.

  15. 148 Chemistry/Chinese Chemistry 347 (3)--Advanced Organic Chemistry

    E-print Network

    Dresden, Gregory

    ,organometalliccatalyticprocesses,andsolid statechemistry.Uffelman. Spring 2008 and alternate years Chemistry 365 (3)--Advanced Physical Chemistry148 Chemistry/Chinese Chemistry 347 (3)--Advanced Organic Chemistry Prerequisite: Chemistry 242,syntheticmethodology,mod- ernsyntheticreactions,protectinggroups,naturalprod- uctssynthesis,andcombinatorialchemistry.France. Spring Chemistry

  16. Innovative interdisciplinary approaches in catchment hydrology: on the potential for diatoms and thermal infrared imagery for documenting spatio-temporal dynamics and connectivity of saturated areas in the hillslope-riparian zone-stream system

    NASA Astrophysics Data System (ADS)

    Pfister, L.; Martínez-Carreras, N.; Wetzel, C.; Ector, L.; Frentress, J.; McDonnell, J. J.

    2012-04-01

    Over the past decades, hydrologists have been relentlessly investigating water source, flowpaths and residence time. These issues are of paramount importance when it comes to both the quantitative and qualitative management of water resources. Support from the scientific community has indeed been repeatedly sollicited by the European Union in the context of an optimization of the implementation of its framework directives on water quality and floods. However, to date large uncertainties remain adjunct to our measurements of hydrological processes on the one hand and the modelling of the precipitation-runoff relationship on the other hand. Originally, investigations on the rainfall-runoff transformation were based on conventional geochemical and isotopic tracing techniques. Unfortunately, well-known and documented technical limitations (e.g. non-stable end-members, incomplete mixing assumptions) have rapidly stymied further progress in our understanding of the rainfall-runoff transformation. More recently, technological progress has created new potential for going well beyond the traditional sources of information, such as rainfall and discharge. New measuring techniques have been recently introduced (e.g. thermographic systems such as temperature fiber optic cables and thermal IR cameras for tracing water source and flowpaths, satellite aperture radar for measuring flood extents and/or soil humidity, laser spectrometers for stable isotope measurements, etc.). Indeed the rainfall-runoff transformation inside a catchment is the result of a plethora of interrelated processes that go well beyond water movements. As a consequence, it is crucial to the development of hydrological science to integrate the advances and knowledge from different disciplines. In other terms, knowledge from ecology, biology, as well as other sciences is needed to better understand the functioning of catchments. We need to work together on common problems to find better solutions In recent years, our research activities have been focusing on the exploration of new research avenues for untapping new insights on inherent hydrological processes, guiding water source and flowpaths. Here, we will present the most recent results obtained to date from interdisciplinary proof-of-concept studies carried out in the Weierbach experimental watershed. New research avenues, such as the introduction of terrestrial diatom tracing in flood waves, will hopefully contribute to reduce uncertainties in the determination of the onset/cessation of surface runoff and connectivity in the hillslope-riparian zone-stream system. Likewise, thermal infrared imaging has shown considerable potential for tracing surface water flowpaths, connectivity, as well as saturated area dynamics.

  17. STRENGTHENING CONCEPTUAL CONNECTIONS IN INTRODUCTORY CHEMISTRY COURSES

    E-print Network

    Bodner, George M.

    was that of Piaget (Herron, 1975: Herron, 1978; Good, Mellon & Kronhout, 1978), which focused on stages of intellectual development and questioned whether it was possible for students to learn certain ideas or concepts until they had reached an appropriate level of epistemic development. In recent years, there has been

  18. Fault Patterns in the South Iceland Seismic Zone Revealed by Double-Difference Mapping of Microeartquakes

    Microsoft Academic Search

    S. Hjaltadottir; K. S. Vogfjord; R. Slunga

    2005-01-01

    The South Iceland Seismic Zone (SISZ) is an approximately 70 km long 15 km wide left lateral shear zone connecting the two rift zones in southern Iceland, the Western Volcanic Zone and the Eastern Volcanic Zone. Historically earthquakes of magnitude 6-7 have occured in this shear zone a few times per century. Even though the trend of the SISZ is

  19. Doing Chemistry

    NSDL National Science Digital Library

    Brooks, David W.

    This website includes over 150 chemistry experiments in the following areas: Atomic Structure, Bonding, Chemical Reactions, Colligative Properties, Condensed States, Electrochemistry, Equilibrium Gases, Instrumentation, Limiting Reactant and more.

  20. Chemistry beyond positivism.

    PubMed

    Brandt, Werner W

    2003-05-01

    Chemistry is often thought to be quite factual, and therefore might be considered close to the "positivist" ideal of a value-free science. A closer look, however, reveals that the field is coupled to the invisible realm of values, meanings, and purpose in various ways, and chemists interact with that realm loosely and unevenly. Tacit knowledge is one important locus of such interactions. We are concerned in this essay with two questions. What is the nature of the knowledge when we are in the early stages of discovery? and In what ways does the hidden reality we are seeking affect our search for an understanding of it? The first question is partly answered by Polanyi's theory of tacit knowledge, while the second one leads us to realize the limitations of our language when discussing "reality"-or certain chemical experimental results. A strictly positivist approach is of little use, but so is the opposite, the complete disregard of facts. The contrast between positivism and non-formulable aspects of scientific reasoning amounts to a paradox that needs to be analyzed and can lead to a "connected" chemistry. This in turn resembles networks described by Schweber and is more concerned than the chemistry "as it is" with aspects such as the image of chemistry, the challenges chemists face as citizens, and chemistry in liberal education. PMID:12796119

  1. Coral Reef Connections

    NSDL National Science Digital Library

    Coral Reef Connections explores the different reef zones of the Great Barrier Reef in Australia, the biodiversity that has evolved there, and the interactions between the many species, their environment, and each other. Users can navigate through a virtual "dive" on the reef, select various organisms, and view the types of relationships they have with each other. Links to related topics and web activities are included.

  2. A Thematic Review of Studies into the Effectiveness of Context-Based Chemistry Curricula

    ERIC Educational Resources Information Center

    Ultay, Neslihan; Calik, Muammer

    2012-01-01

    Context-based chemistry education aims at making connections between real life and the scientific content of chemistry courses. The purpose of this study was to evaluate context-based chemistry studies. In looking for the context-based chemistry studies, the authors entered the keywords "context-based", "contextual learning" and "chemistry

  3. Chem 681 Quantum Chemistry Chemistry 681

    E-print Network

    Chem 681 Quantum Chemistry Chemistry 681 Introduction to Quantum Chemistry Fall 2003 Course outline-consistent field (Hartree-Fock) theory. G.S. Ezra 1 Cornell University #12;Chem 681 Quantum Chemistry 8. Molecules

  4. Teaching Chemistry Using the Movie "Apollo 13."

    ERIC Educational Resources Information Center

    Goll, James G.; Woods, B. J.

    1999-01-01

    Offers suggestions for incorporating topics that relate to the Apollo 13 space mission into a chemistry course. Discusses connections between the study of chemistry and space exploration, including fuels and oxidants used, reasons for an oxygen tank rupture, and lithium hydroxide-containing carbon dioxide filters. Contains 11 references. (WRM)

  5. Lycos Zone

    NSDL National Science Digital Library

    In the tradition of Yahooligans (reviewed in the March 22, 1996 Scout Report) and other so-called "green spaces," Lycos has created a new online safe haven for young users which is fairly self-contained, with the exception of the advertisements. (In response to criticisms regarding aggressive marketing to children at similar sites, Lycos claims that the ads are clearly marked and will not collect any personal information.) The site is composed of four sections: the Fun and Games Zone, the Homework Zone, the New and Cool Zone, and an area for parents and teachers. The first two sections are fairly deep, with numerous resources and activities aimed at various age levels. Some links in the Homework Zone lead users outside the site, but they are first presented with a gateway page informing them that they are leaving and offering advice on not divulging personal information.

  6. NO PRINTING ZONE NO PRINTING ZONE NO PRINTING ZONE NO PRINTING ZONE NO PRINTING ZONE NO PRINTING ZONE NO PRINTING ZONE NO PRINTING ZONE NO PRINTING ZONE NO PRINTING ZONE NO PRINTING ZONE NO PRINTING ZONE NO PRINTING ZONE NO PRINTING ZONE NO PRINTING ZONE

    E-print Network

    Kainen, Paul C.

    N O P R I N TI N G Z O N E N O P R I N TI N G Z O N E N O P R I N TI N G Z O N E NO PRINTING ZONE NO PRINTING ZONE NO PRINTING ZONE NO PRINTING ZONE NO PRINTING ZONE NO PRINTING ZONE NO PRINTING ZONE NO PRINTING ZONE NO PRINTING ZONE NO PRINTING ZONE NO PRINTING ZONE NO PRINTING ZONE NO PRINTING ZONE

  7. Circumstellar chemistry

    NASA Technical Reports Server (NTRS)

    Glassgold, Alfred E.; Huggins, Patrick J.

    1987-01-01

    The study of the outer envelopes of cool evolved stars has become an active area of research. The physical properties of CS envelopes are presented. Observations of many wavelengths bands are relevant. A summary of observations and a discussion of theoretical considerations concerning the chemistry are summarized. Recent theoretical considerations show that the thermal equilibrium model is of limited use for understanding the chemistry of the outer CS envelopes. The theoretical modeling of the chemistry of CS envelopes provides a quantitive test of chemical concepts which have a broader interest than the envelopes themselves.

  8. Water chemistry of heating networks

    Microsoft Academic Search

    M. K. Bogatyreva; N. I. Serebryannikov; T. K. Margulova; O. I. Martynova

    1979-01-01

    The reliability and efficiency of district heating equipment are inseparably connected with the water chemistry of the heating networks. Losses of water in the heating networks are made up by makeup water the quality of which must meet certain demands. In selecting the system of water treatment of makeup water for the heating networks one must take into account both

  9. Corporate connections.

    PubMed

    Adsit, K I; O'Neill, P N

    1987-01-01

    Mutually beneficial connections can be made between academic institutions and industry to meet respective goals and objectives. The University of Texas System Cancer Center cooperated with a major oil company to form such a connection. The link provided the center with funds to produce videotaped cancer detection and prevention modules for employees of the company. This connection and others like it may prove essential to the future well being of biomedical communication units. PMID:3667578

  10. Cooperative Chemistry

    NSDL National Science Digital Library

    Allan A. Gahr

    2003-02-01

    Concept mapping in the organic chemistry laboratory can supplant cookbook activities with higher cognitive exercises. The common thread of most organic lab experiments is the synthesis, isolation, purification, and characterization of a carbon compound. T

  11. Radioanalytical Chemistry

    NSDL National Science Digital Library

    Hardy, James K.

    This website provides a course on the use of radionuclides in analytical chemistry. Types of radioactive decay are discussed as well as the techniques of scintillation counting, neutron activation analysis, and gamma spectroscopy.

  12. Precolumbian Chemistry.

    ERIC Educational Resources Information Center

    Robinson, Janet Bond

    1995-01-01

    Describes the content and development of a curriculum that provides an approach to descriptive chemistry and the history of technology through consideration of the pottery, metallurgy, pigments, dyes, agriculture, and medicine of pre-Columbian people. (DDR)

  13. Green Chemistry

    NSDL National Science Digital Library

    2011-03-02

    Learn about a study in which participants discovered contaminants in their homes, and how green chemistry may provide alternatives to such everyday toxins, in this video adapted from Contaminated Without Consent.

  14. Chemistry Notes.

    ERIC Educational Resources Information Center

    School Science Review, 1981

    1981-01-01

    Describes 13 activities, experiments and demonstrations, including the preparation of iron (III) chloride, simple alpha-helix model, investigating camping gas, redox reactions of some organic compounds, a liquid crystal thermometer, and the oxidation number concept in organic chemistry. (JN)

  15. Stratospheric chemistry

    SciTech Connect

    Brune, W.H. (USAF, Geophysics Laboratory, Hanscom AFB, MA (United States))

    1991-01-01

    Advances in stratospheric chemistry made by investigators in the United States from 1987 to 1990 are reviewed. Subject areas under consideration include photochemistry of the polar stratosphere, photochemistry of the global stratosphere, and assessments of inadvertent modification of the stratosphere by anthropogenic activity. Particular attention is given to early observations and theories, gas phase chemistry, Antarctic observations, Arctic observations, odd-oxygen, odd-hydrogen, odd-nitrogen, halogens, aerosols, modeling of stratospheric ozone, and reactive nitrogen effects.

  16. Humanizing Chemistry Education: From Simple Contextualization to Multifaceted Problematization

    ERIC Educational Resources Information Center

    Sjöström, Jesper; Talanquer, Vicente

    2014-01-01

    Chemistry teaching has traditionally been weakly connected to everyday life, technology, society, and history and philosophy of science. This article highlights knowledge areas and perspectives needed by the humanistic (and critical-reflexive) chemistry teacher. Different humanistic approaches in chemistry teaching, from simple contextualization…

  17. Physical Chemistry in Practice: Evaluation of DVD Modules

    ERIC Educational Resources Information Center

    Dyer, James U.; Towns, Marcy; Weaver, Gabriela C.

    2007-01-01

    The Physical Chemistry in Practice (PCIP) DVD contains video programs (modules) and experimental data that present the research of scientists working in applications of physical chemistry. The DVD allows students to learn about cutting edge research in physical chemistry while making connections to the theoretical concepts learned in lecture.…

  18. Making Connections

    ERIC Educational Resources Information Center

    Pien, Cheng Lu; Dongsheng, Zhao

    2011-01-01

    Effective teaching includes enabling learners to make connections within mathematics. It is easy to accord with this statement, but how often is it a reality in the mathematics classroom? This article describes an approach in "connecting equivalent" fractions and whole number operations. The authors illustrate how a teacher can combine a common…

  19. Breathing zone air sampler

    DOEpatents

    Tobin, John (Bethel Park, PA)

    1989-01-01

    A sampling apparatus is provided which comprises a sampler for sampling air in the breathing zone of a wearer of the apparatus and a support for the sampler preferably in the form of a pair of eyeglasses. The sampler comprises a sampling assembly supported on the frame of the eyeglasses and including a pair of sample transport tubes which are suspended, in use, centrally of the frame so as to be disposed on opposite sides of the nose of the wearer and which each include an inlet therein that, in use, is disposed adjacent to a respective nostril of the nose of the wearer. A filter holder connected to sample transport tubes supports a removable filter for filtering out particulate material in the air sampled by the apparatus. The sample apparatus is connected to a pump for drawing air into the apparatus through the tube inlets so that the air passes through the filter.

  20. About connections

    PubMed Central

    Rockland, Kathleen S.

    2015-01-01

    Despite the attention attracted by “connectomics”, one can lose sight of the very real questions concerning “What are connections?” In the neuroimaging community, “structural” connectivity is ground truth and underlying constraint on “functional” or “effective” connectivity. It is referenced to underlying anatomy; but, as increasingly remarked, there is a large gap between the wealth of human brain mapping and the relatively scant data on actual anatomical connectivity. Moreover, connections have typically been discussed as “pairwise”, point x projecting to point y (or: to points y and z), or more recently, in graph theoretical terms, as “nodes” or regions and the interconnecting “edges”. This is a convenient shorthand, but tends not to capture the richness and nuance of basic anatomical properties as identified in the classic tradition of tracer studies. The present short review accordingly revisits connectional weights, heterogeneity, reciprocity, topography, and hierarchical organization, drawing on concrete examples. The emphasis is on presynaptic long-distance connections, motivated by the intention to probe current assumptions and promote discussions about further progress and synthesis. PMID:26042001

  1. Regular connections among generalized connections

    Microsoft Academic Search

    Christian Fleischhack

    2003-01-01

    The properties of the space A of regular connections as a subset of the space A? of generalized connections in the Ashtekar framework are studied. For every choice of compact structure group and smoothness category for the paths, it is determined whether A is dense in A? or not. Moreover, it is proven that A has Ashtekar–Lewandowski measure zero for

  2. Surface chemistry of Cr(III) oxidation and precipitation on Mn(IV) oxides Gautier Landrot, landrot@udel.edu, Department of Plant and Soil Sciences and Center for Critical Zone Research, University of

    E-print Network

    Sparks, Donald L.

    Surface chemistry of Cr(III) oxidation and precipitation on Mn(IV) oxides GEOC 29 Gautier Landrot, Newark, DE 19717. The main soil components that oxide Cr(III) to the more hazardous chromium species Cr(VI) are manganese oxides. With hydrous manganese oxide (HMO) and birnessite, Cr(III) may react in two steps: a first

  3. CHEMISTRY 108-01 GENERAL CHEMISTRY II

    E-print Network

    Findley, Gary L.

    CHEMISTRY 108-01 GENERAL CHEMISTRY II Fall Term, 2002 10:00 - 10:50 am, MWThF CNSB 243 INSTRUCTOR-1835 Email: findley@ulm.edu URL: www.ulm.edu/chemistry/findley COURSE Content: Principles of modern chemistry. Goals/ Objectives: CHEM 108 is the second semester of a fundamental introduction to chemistry

  4. CHEMISTRY 107-01 GENERAL CHEMISTRY I

    E-print Network

    Findley, Gary L.

    CHEMISTRY 107-01 GENERAL CHEMISTRY I Spring 2002 8:00 am - 8:50 am, MTuWTh Rm. CNSB 243 INSTRUCTOR-1835 Email: chfindley@ulm.edu URL: http://www.ulm.edu/chemistry/findley COURSE Content: Principles of modern chemistry. Goals/ Objectives: CHEM 107 is the first semester of a fundamental introduction to chemistry

  5. Chem 681 Quantum Chemistry Chemistry 681

    E-print Network

    ]. The physical chemistry text by McQuarrie & Simon [3] (used in Chem 390) also has relevant material. The third] McQuarrie and Simon, Physical Chemistry (University Science Books). [4] R.P. Feynman, R.B. LeightonChem 681 Quantum Chemistry Chemistry 681 Introduction to Quantum Chemistry Fall 2003 BIBLIOGRAPHY

  6. CHEMISTRY 321 PHYSICAL CHEMISTRY LABORATORY I

    E-print Network

    Findley, Gary L.

    CHEMISTRY 321 PHYSICAL CHEMISTRY LABORATORY I Fall 2009 2:00 - 5:00 pm, F CNSB 142 INSTRUCTOR techniques of physical chemistry. Goals/ Objectives: Physical Chemistry Laboratory introduces the student analysis software and IEEE-488 electronic devices. The focus for Physical Chemistry Laboratory I

  7. CHEMISTRY 323 PHYSICAL CHEMISTRY LABORATORY II

    E-print Network

    Findley, Gary L.

    CHEMISTRY 323 PHYSICAL CHEMISTRY LABORATORY II Spring 2010 2:00 - 5:00 pm, F CNSB 142 INSTRUCTOR techniques of physical chemistry. Goals/ Objectives: Physical Chemistry Laboratory introduces the student analysis software and IEEE-488 electronic devices. The focus for Physical Chemistry Laboratory II

  8. Chemistry Now

    NSDL National Science Digital Library

    2012-08-17

    The National Science Foundation (NSF) recently teamed up with NBC and the National Science Teachers Association to celebrate the International Year of Chemistry. Their big joint project was to create Chemistry Now, a weekly online video series that uncovers and explains the science of common, physical objects. There are over two dozen short films here that cover topics like the chemistry of salt, grapheme, safety glass, and the common cheeseburger. All of the videos are lively and interesting, and they can be used in a wide range of classroom settings to provide visual and audio reinforcement of topics that might be addressed in course lectures and other activities. The videos are completely free and the site includes links to other organizations that have created similar videos.

  9. Chemistry & Industry

    NSDL National Science Digital Library

    1997-01-01

    Chemistry and Industry Magazine, a bimonthly product of the Society of Chemical Industry, provides selected full-text articles from the print magazine in the areas of news, commentary, features, latest results from chemical literature, and highlights from the latest European patents. In addition, there is a searchable and browsable archive of past issues, a daily news section, and searchable jobs and meetings databases. The Society of Chemical Industry is "an international association of about 6000 members aimed at furthering applied chemistry." One of the highlights of its web site is its publication section, where, under "electronic publications," readers can find updated daily news, jobs and meetings listings on chemistry, pharmaceuticals, biotechnology, and the environment.

  10. Polymer Chemistry

    NASA Technical Reports Server (NTRS)

    Williams, Martha; Roberson, Luke; Caraccio, Anne

    2010-01-01

    This viewgraph presentation describes new technologies in polymer and material chemistry that benefits NASA programs and missions. The topics include: 1) What are Polymers?; 2) History of Polymer Chemistry; 3) Composites/Materials Development at KSC; 4) Why Wiring; 5) Next Generation Wiring Materials; 6) Wire System Materials and Integration; 7) Self-Healing Wire Repair; 8) Smart Wiring Summary; 9) Fire and Polymers; 10) Aerogel Technology; 11) Aerogel Composites; 12) Aerogels for Oil Remediation; 13) KSC's Solution; 14) Chemochromic Hydrogen Sensors; 15) STS-130 and 131 Operations; 16) HyperPigment; 17) Antimicrobial Materials; 18) Conductive Inks Formulations for Multiple Applications; and 19) Testing and Processing Equipment.

  11. Fluid pressure and flow at great depth in the continental crust. A discussion in relation to topography, temperature and salinity distribution using as an example the KTB Fault Zones in connection with the Eger Rift Hot Spot

    Microsoft Academic Search

    W. Kessels; S. Kuhlmann; X. Li

    2006-01-01

    Hydraulic investigations in and between the two KTB boreholes have shown that groundwater flow is possible at great depth in the crystalline crust. Remarkable permeability was found particularly in the SE1 and SE2 fault zones. The results from a long term pump and injection test, and the related three-dimensional groundwater modelling (Graesle et al., 2006), document the existence of a

  12. Chemistry 320N Organic Chemistry II

    E-print Network

    Chemistry 320N Organic Chemistry II for Prehealth Professionals Unique number: 52365 Spring 2013 M students can access the information. #12;Required Text: Brown, Foote, Iverson, & Anslyn Organic Chemistry

  13. Chemistry Notes

    ERIC Educational Resources Information Center

    School Science Review, 1976

    1976-01-01

    Describes several chemistry projects, including solubility, formula for magnesium oxide, dissociation of dinitrogen tetroxide, use of 1-chloro-2, 4-dinitrobenzene, migration of ions, heats of neutralizations, use of pocket calculators, sonic cleaning, oxidation states of manganese, and cell potentials. Includes an extract from Chemical Age on…

  14. Nuclear Chemistry

    NSDL National Science Digital Library

    This page, from the University of North Carolina - Chapel Hill Chemistry Fundamentals program and the Shodor Education Foundation, discusses five different types of radioactive decay: alpha, beta negative, gamma, positron emission, and electron capture. After examining the numerous equations, students can test their dating skills by solving three practice problems. Solutions are included.

  15. Chemistry Notes.

    ERIC Educational Resources Information Center

    School Science Review, 1980

    1980-01-01

    Presents 12 chemistry notes for British secondary school teachers. Some of these notes are: (1) a simple device for testing pH-meters; (2) portable fume cupboard safety screen; and (3) Mass spectroscopy-analysis of a mass peak. (HM)

  16. Chemistry Notes.

    ERIC Educational Resources Information Center

    School Science Review, 1978

    1978-01-01

    Describes some laboratory apparatus, chemistry experiments and demonstrations, such as a Kofler block melting point apparatus, chromatographic investigation of the phosphoric acid, x-ray diffraction, the fountain experiment, endothermic sherbet, the measurement of viscosity, ionization energies and electronic configurations. (GA)

  17. Green Chemistry

    NSDL National Science Digital Library

    WGBH Educational Foundation

    2010-02-12

    This audio segment from PRI's The World Science Podcast explores the science of Green Chemistry. Hear about companies that are developing greener chemicals, and learn why they are fast becoming an attractive alternative for the multi-billion dollar chemical industry.

  18. Countertop Chemistry

    NSDL National Science Digital Library

    Chemistry activities and demonstrations that use common household items and kitchen chemicals. There are activities appropriate for students in elementary school, middle school, and high school. The activities were designed and tested by the Science House, the science and mathematics learning outreach program of North Carolina State University.

  19. Chemistry Activities

    NSDL National Science Digital Library

    This collection of resource features demonstrations, laboratory investigations, teaching tips, worksheets and other chemistry-related activities. Materials include investigations of mols, nuclear energy, the periodic table, weight and mass, elements, calculations, equations, pH, atomic weight, half-lives, and reactions.

  20. Analytical Chemistry

    NSDL National Science Digital Library

    Hardy, James K.

    This site features lecture notes for first and second level courses in analytical chemistry. Topics include titrations, gravimetry, kinetics and electrochemistry (redox). Potentiometry, coulometry, voltammetry, spectroscopic and separation methods are presented as well, and are illustrated with QuickTime animations.

  1. Common Chemistry

    NSDL National Science Digital Library

    Chemical Abstracts Service (CAS)

    A web resource that contains Chemical Abstracts Service (CAS) Registry Numbers for approximately 7,800 chemicals of widespread general public interest. Common Chemistry is helpful to non-chemists who know either a name or CAS Registry Number® of a common chemical and want to pair both pieces of information.

  2. Atmospheric Chemistry

    NSDL National Science Digital Library

    This set of links provides access to resources on atmospheric chemistry, especially acid deposition, air pollution, and air quality. The sites include personal and government pages, universities and research groups, non-governmental organizations and meetings, and products and services. There are also links to related search topics.

  3. Chemistry Notes

    ERIC Educational Resources Information Center

    School Science Review, 1972

    1972-01-01

    Short articles on the kinetics of the hydrogen peroxide-iodide ion reaction, simulation of fluidization catalysis, the use of Newman projection diagrams to represent steric relationships in organic chemistry, the use of synthetic substrates for proteolytic enzyme reactions, and two simple clock reactions"--hydrolysis of halogenoalkanes and…

  4. Fall 2011 Chemistry 676

    E-print Network

    Mather, Patrick T.

    Fall 2011 Chemistry 676 "Introduction to organic synthesis: Methodology" T chemistry, olefination reactions, cross coupling chemistry, and modern transition metal are due by 1200 (noon) in my office (CST 3-008) or my mailbox in the chemistry

  5. 33 CFR 165.1321 - Security Zone; Protection of Military Cargo, Captain of the Port Zone Puget Sound, WA.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...following areas are security zones: (1) Blair Waterway Security Zone: The Security Zone in the Blair Waterway, Commencement Bay, WA, includes all waters enclosed by a line connecting...then southeasterly along the shoreline of the Blair Waterway to the Blair Waterway turning...

  6. 33 CFR 165.1321 - Security Zone; Protection of Military Cargo, Captain of the Port Zone Puget Sound, WA.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...following areas are security zones: (1) Blair Waterway Security Zone: The Security Zone in the Blair Waterway, Commencement Bay, WA, includes all waters enclosed by a line connecting...then southeasterly along the shoreline of the Blair Waterway to the Blair Waterway turning...

  7. 33 CFR 165.1321 - Security Zone; Protection of Military Cargo, Captain of the Port Zone Puget Sound, WA.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...following areas are security zones: (1) Blair Waterway Security Zone: The Security Zone in the Blair Waterway, Commencement Bay, WA, includes all waters enclosed by a line connecting...then southeasterly along the shoreline of the Blair Waterway to the Blair Waterway turning...

  8. 33 CFR 165.1321 - Security Zone; Protection of Military Cargo, Captain of the Port Zone Puget Sound, WA.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...following areas are security zones: (1) Blair Waterway Security Zone: The Security Zone in the Blair Waterway, Commencement Bay, WA, includes all waters enclosed by a line connecting...then southeasterly along the shoreline of the Blair Waterway to the Blair Waterway turning...

  9. 33 CFR 165.1321 - Security Zone; Protection of Military Cargo, Captain of the Port Zone Puget Sound, WA.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...following areas are security zones: (1) Blair Waterway Security Zone: The Security Zone in the Blair Waterway, Commencement Bay, WA, includes all waters enclosed by a line connecting...then southeasterly along the shoreline of the Blair Waterway to the Blair Waterway turning...

  10. Resin Chemistry

    Microsoft Academic Search

    Louis Pilato

    2010-01-01

    \\u000a During the ensuing years since the last phenolic resins book was published, many new and remarkable developments have occurred\\u000a in the realm of phenolic chemistry and are given in this chapter.\\u000a \\u000a \\u000a A critical examination of the first step or addition step (methylolation) in the preparation of resoles is described and how\\u000a it can be controlled and compared with the typical

  11. Connections Transport Layer

    E-print Network

    Ramkumar, Mahalingam

    layer Processes - application layer Could be connection oriented or connectionless Example - TCP, connection oriented UDP - connectionless Ramkumar TL #12;Services Connections TCP UDP Connection Oriented

  12. Chemistry on Polycyclic Aromatic Hydrocarbons

    NASA Astrophysics Data System (ADS)

    Hornekaer, Liv

    Chemistry on Polycyclic Aromatic Hydrocarbons Even though Polycyclic Aromatic Hydrocarbons (PAHs) are ubiquitous in the interstellar medium, the role they play as catalysts for interstellar chemistry is still largely unexplored. However, existing experimental data and theoretical calculations indicate that PAHs may well play a very active role, in particular in connection with the formation of molecular hydrogen. These findings may explain observations of increased molecular hydrogen formation rates in Photodissociation regions with high PAH abundances. In my talk I will present temperature programmed desorption data demonstrating the formation of highly super-hydrogenated PAHs via hydrogen addition reactions and catalytic formation of molecular hydrogen via abstraction reactions at a wide range of H atom temperatures. Approximate cross-sections for these reactions derived via model simulations will be presented. The implications for the role played by PAHs in interstellar chemistry will be discussed.

  13. Physical Chemistry with a Purpose

    NSDL National Science Digital Library

    Francl, Michelle M.

    "The goal of this NSF funded project is to produce a trial set of materials that can be used in physical chemistry courses to more tightly connect the topics introduced in available texts to the realm of modern chemical research." Six modules are currently available at this website, with four more planned by 2006. Each module supplies a reference to a chemistry article, background information, sample questions to stimulate students to think critically about the subject matter, and additional sample chemistry questions. If users are interested in the entire module, they need to contact the author by the email provided. Educators can learn about the teaching approach used in the materials and why the authors feel they are important for education.

  14. Atmospheric Chemistry and Air Pollution

    DOE PAGESBeta

    Gaffney, Jeffrey S.; Marley, Nancy A.

    2003-01-01

    Atmospheric chemistry is an important discipline for understanding air pollution and its impacts. This mini-review gives a brief history of air pollution and presents an overview of some of the basic photochemistry involved in the production of ozone and other oxidants in the atmosphere. Urban air quality issues are reviewed with a specific focus on ozone and other oxidants, primary and secondary aerosols, alternative fuels, and the potential for chlorine releases to amplify oxidant chemistry in industrial areas. Regional air pollution issues such as acid rain, long-range transport of aerosols and visibility loss, and the connections of aerosols to ozonemore »and peroxyacetyl nitrate chemistry are examined. Finally, the potential impacts of air pollutants on the global-scale radiative balances of gases and aerosols are discussed briefly.« less

  15. College Connection

    ERIC Educational Resources Information Center

    Hewitt, Kimberly Kappler; Scalzo, Mary Jo

    2012-01-01

    This article describes Oakwood City School District's College Connection Study, which is now in its eighth year. The purpose of the study is to help the educators in the district learn how to effectively prepare students for success in the colleges of their choice. Teachers, administrators, and other staff members travel to colleges to conduct…

  16. Making Connections

    ERIC Educational Resources Information Center

    Quillen, Ian

    2014-01-01

    "We used to send out books that looked like this," says Barbara Dreyer, as she holds the 500-page volume from one of the first-ever courses offered online by Connections Academy. "You could look at this information online, but, frankly, a lot of people were doing this," she adds, thumbing through the book's pages. Dreyer,…

  17. Getting Connected

    ERIC Educational Resources Information Center

    Larkin, Patrick

    2011-01-01

    That the world outside schools is changing faster than ever is old news. Unfortunately, that the world "inside" schools is changing at a glacial pace is even older news. As school leaders, principals have an important choice to make as they move into the second decade of the 21st century. School leaders have a moral obligation to connect and…

  18. Building Connections

    NSDL National Science Digital Library

    NCTM

    2012-08-01

    This learning activity guides students to make connections between linear and polynomial functions through exploring their graphs. This lesson plan is outlined with step-by-step directions for teachers to follow as well as guiding questions and assessment options to ensure ample feedback on students' progress and mastery levels.

  19. Get Connected

    ERIC Educational Resources Information Center

    Horton, Jessica; Hagevik, Rita; Adkinson, Bennett; Parmly, Jilynn

    2013-01-01

    Technology can be both a blessing and a curse in the classroom. Although technology can provide greater access to information and increase student engagement, if screen time replaces time spent outside, then students stand to lose awareness and connectivity to the surrounding natural environment. This article describes how Google Earth can foster…

  20. Chemistry 411/611 Inorganic Chemistry (2010)

    E-print Network

    Mather, Patrick T.

    2010-01-01

    1 Chemistry 411/611 Inorganic Chemistry (2010) Instructor: Assistant Professor Mathew M. Maye: M-W 4:00-5:00, and by appointment Credits: 3 Text: (Required) Shriver & Atkins, "Inorganic Chemistry. (Suggested for CHE611 Students pursuing Inorganic) Huheey, "Inorganic Chemistry: Principles of Structure

  1. CHEMISTRY 3022-63067 PHYSICAL CHEMISTRY II

    E-print Network

    Findley, Gary L.

    CHEMISTRY 3022-63067 PHYSICAL CHEMISTRY II Spring 2014 8:00 am - 8:50 am, MWF CNSB 211 INSTRUCTOR interpretations of the physical principles of chemistry. Goals/ Objectives: CHEM 3022 presents chemical principles: Physical Chemistry, R. Stephen Berry, Stuart A. Rice and John Ross, 2nd ed. (Oxford Univ. Press, New York

  2. CHEMISTRY 1010 CHEMISTRY, HUMANITY AND ENVIRONMENT

    E-print Network

    Simons, Jack

    CHEMISTRY 1010 CHEMISTRY, HUMANITY AND ENVIRONMENT Spring 2006 Instructor: Dr. Laya Kesner, HEB - 002 H ST 205 11:50 a.m.-12:40 p.m. Teaching Assistant: Chem 1010-002 Michelle Taliaferro, michelle@chemistry; 9:30 a.m. - 5:30 p.m. Textbook: Chemistry for Changing Times, 10th Edition, Hill & Kolb, Prentice

  3. Chemistry 211 General Chemistry Laboratory II

    E-print Network

    Nickrent, Daniel L.

    Chemistry 211 General Chemistry Laboratory II Fall 2014 Instructor Dr. Michelle Greene Office: Neckers 295 Office Hours: by appointment Phone: TBA E-mail: mgreene@chem.siu.edu Text Chemistry 211 University Carbondale) Course Description "General Chemistry Laboratory II" is an introductory level

  4. CHEMISTRY 162 GENERAL CHEMISTRY II SPRING 2008

    E-print Network

    Vonessen, Nikolaus

    1 of 10 CHEMISTRY 162 GENERAL CHEMISTRY II SPRING 2008 Lead Instructor Professor Mark S. Cracolice survey of chemistry. We follow the standard curriculum in the United States, as suggested by the American an introduction to the principles of physical and inorganic chemistry appropriate for the level of knowledge

  5. CHEMISTRY 3020-43256 PHYSICAL CHEMISTRY I

    E-print Network

    Findley, Gary L.

    CHEMISTRY 3020-43256 PHYSICAL CHEMISTRY I Fall 2013 8:00 am - 8:50 am, MWF SUGAR 259 INSTRUCTOR interpretations of the physical principles of chemistry. Goals/ Objectives: CHEM 3020 presents chemical principles foundations of modern chemistry. Topics covered include: introduction to quantum theory, atomic structure

  6. SYLLABUS for CHEMISTRY 2310 ORGANIC CHEMISTRY 1

    E-print Network

    Simons, Jack

    SYLLABUS for CHEMISTRY 2310 ORGANIC CHEMISTRY 1 Lectures: Monday, Wednesday and Friday 8:35 AM-9 Chemistry" by Janice Gorzynski Smith, McGraw Hill, 3rd Edition, 2010 [2nd Edition will suffice]. The ebook · Highly Recommended Equipment: Turning Point Clicker · Highly Recommended: (1) "Organic Chemistry I

  7. CHEMISTRY 3020-42232 PHYSICAL CHEMISTRY I

    E-print Network

    Findley, Gary L.

    CHEMISTRY 3020-42232 PHYSICAL CHEMISTRY I Fall 2011 8:00 am - 8:50 am, MWF CNSB 211 INSTRUCTOR interpretations of the physical principles of chemistry. Goals/ Objectives: CHEM 3020 presents chemical principles.) REQUIREMENTS Prerequisites: "C" or better in CHEM 1008; PHYS 2008; MATH 1032. Text: Physical Chemistry, P

  8. CHEMISTRY DEPARTMENT Chem 315 (Honors Organic Chemistry)

    E-print Network

    Lawson, Catherine L.

    CHEMISTRY DEPARTMENT Chem 315 (Honors Organic Chemistry) Fall 2014 Important Registration Information Admission to Honors Organic Chemistry (Fall 2014) is restricted to the following students: Students who received an A in both semesters of General Chemistry (159 and 160 OR 161 and 162 OR 163

  9. CHEMISTRY 3022-62169 PHYSICAL CHEMISTRY II

    E-print Network

    Findley, Gary L.

    CHEMISTRY 3022-62169 PHYSICAL CHEMISTRY II Spring 2012 8:00 am - 8:50 am, MWF CNSB 211 INSTRUCTOR interpretations of the physical principles of chemistry. Goals/ Objectives: CHEM 3022, which is a continuation of CHEM 3020, focuses of the quantum theoretical foundations of modern chemistry. Topics covered include

  10. Chemistry 224 Fall 2008 Honors General Chemistry

    E-print Network

    Richmond, Geraldine L.

    Chemistry 224 Fall 2008 Honors General Chemistry Dr. Greg Williams Office hours: Onyx 182 Tu and Th 110 Required Materials: Textbook General Chemistry: Principles and Modern Applications by R. Petrucci Prerequisites: One year of high school chemistry and one year of high school physics are the minimum

  11. Position: Assistant Professor of Chemistry, Physical Chemistry

    E-print Network

    John Grey Position: Assistant Professor of Chemistry, Physical Chemistry Email: jkgrey of Physical Chemistry C (2010) ACS ASAP. 2. "Resonance Raman Spectroscopic- and Photocurrent Imaging of Polythiophene/Fullerene Solar Cells" Y.Gao, T.P. Martin, A.K. Thomas, J.K. Grey. Journal of Physical Chemistry

  12. Connecting Organelles

    NSDL National Science Digital Library

    Nils Wiedemann (Universität Freiburg; Institut für Biochemie und Molekularbiologie, Zentrum für Biochemie und Molekulare Zellforschung and Centre for Biological Signalling Studies)

    2009-07-24

    This perspective discusses a recent report demonstrating the existence of a complex of proteins connecting mitochondria to the endoplasmic reticulum. Mitochondria are organelles that form a dynamic network in most eukaryotic cell types. Although originally considered to be semi-autonomous powerhouses, they are intimately connected to the rest of the cell through metabolic and signaling pathways, and play a central role in programmed cell death (apoptosis). Sites of close proximity between mitochondria and the tubular network of the endoplasmic reticulum have long been known from electron micrographs, yet their molecular nature remained elusive. In a recent report, Kornmann et al. show that a complex of proteins that controls mitochondrial shape and protein biogenesis bridge these two organelles.

  13. Regional connections

    Microsoft Academic Search

    F. D. Por

    \\u000a The Pantanal is the centre of a whole system of wetlands which are encountered in continental South America. The connections\\u000a with the swamps of the Guaporé were already mentioned above. The wetlands situated to the north and the west of the Pantanal\\u000a are even less known than the Pantanal itself. One fact has to be emphasized, however: these wetlands have

  14. Azulene Chemistry

    NSDL National Science Digital Library

    The month's featured molecules come from the paper An Azulene-Based Discovery Experiment: Challenging Students To Watch for the "False Assumption" by Charles Garner illustrating some of the chemistry of a substituted azulene. Azulene is a structural isomer of naphthalene and differs from it in several important ways, the most obvious being azulene's intense blue color, which arises from the S0 ? S2 transition. Another unusual feature of this molecule is that its fluorescence arises from the reverse of this transition rather than from S1 ? S0.

  15. Interstellar chemistry

    PubMed Central

    Klemperer, William

    2006-01-01

    In the past half century, radioastronomy has changed our perception and understanding of the universe. In this issue of PNAS, the molecular chemistry directly observed within the galaxy is discussed. For the most part, the description of the molecular transformations requires specific kinetic schemes rather than chemical thermodynamics. Ionization of the very abundant molecular hydrogen and atomic helium followed by their secondary reactions is discussed. The rich variety of organic species observed is a challenge for complete understanding. The role and nature of reactions involving grain surfaces as well as new spectroscopic observations of interstellar and circumstellar regions are topics presented in this special feature. PMID:16894148

  16. Chemistry References

    NSDL National Science Digital Library

    Kim

    2007-08-08

    This site highlights chemistry resources that we consider essentiala fabulous periodic table, a database of chemical compounds, a set of demonstrations of chemical reactions that are just plain spectacular, and, dont forget, laboratory safety. Articles from the web sites Whats That Stuff? and Science News for Kids can be used as supplemental reading all through the year. This site explains the history and characteristics of over 20 substances, such as sunscreen, Cheese Whiz, baseballs, fluoride, new car smell, ink, lipstick, bug spray, and licorice. The individual articles are nontechnical for the most part and are presented in a fun way that readers will enjoy. Also, if a ...

  17. Fluid pressure and flow at great depth in the continental crust. A discussion in relation to topography, temperature and salinity distribution using as an example the KTB Fault Zones in connection with the Eger Rift Hot Spot.

    NASA Astrophysics Data System (ADS)

    Kessels, W.; Kuhlmann, S.; Li, X.

    2006-12-01

    Hydraulic investigations in and between the two KTB boreholes have shown that groundwater flow is possible at great depth in the crystalline crust. Remarkable permeability was found particularly in the SE1 and SE2 fault zones. The results from a long term pump and injection test, and the related three-dimensional groundwater modelling (Graesle et al., 2006), document the existence of a large-scale (more than 10 km) hydraulic reservoir in the crystalline crust. According to this calculation, an overpressure of 0.4 MPa can be still be expected in KTB-HB in 2009, 4 years after the end of the injection. The good match with the measurement data confirms groundwater pathways at a scale of more than 10 km. The isotopic water composition recovered from the KTB pilot hole indicates a downward water flow along the SE2 fault zone, which is in contact with the Franconian Line. Moreover, there is a deep upward groundwater flow 60 km away in the western Eger Rift Valley as indicated e.g. by the temperature signature and gas flow observations. Therefore, the demand for fluid mass continuity means that water is being supplied by a downstream groundwater flow, probably from the Franconian Line. The question of potential driving processes must be answered to understand and quantify the flow in the deeper crust at a scale of 10 km to 100 km. The processes must result in a sufficient horizontal pressure gradient to allow groundwater flow at great depth. The density variations of groundwater with depth are highly relevant for the calculation of horizontal pressure differences. The two independent potential fields of gravity and pressure have to be considered. Differentiation into 4 relevant driving processes is required: \\bullet The groundwater surface topography related to the groundwater recharge and mean regional distance between neighbouring valleys \\bullet Geothermal gradient and water density depending on temperature and pressure \\bullet Different salt contents in adjacent geological formations \\bullet Gas content in the water and gas dissolution The interpretation of these processes for the Eger Rift Franconian Line area results in horizontal pressure gradients up to 0.5 MPa/km. With these pressure gradients in deep fault zones similar to the KTB fault zones SE1 and SE2, a remarkable groundwater flow is also possible in the deep crystalline crust. For only a 1 MPa pressure difference between the Franconian Line and the Eger Rift Valley, which lie nearly 60 km apart, we get a tracer velocity of 1.0 to 5.0 m/a (using the Darcy relation and porosities for the hydraulic KTB data). The flow system at great depth is determined mainly by the counteractive forces of salinity and temperature with a nonlinear relation to the water density. References GRAESLE, W., KESSELS, W., KUEMPEL, H.-J., LI, XUAN (2006): HYDRAULIC OBSERVATIONS FROM A ONE YEAR FLUID PRODUCTION TEST IN THE 4000 M DEEP KTB PILOT BOREHOLE. GEOFLUIDS, 6, 8 23 KESSELS, W., KUECK, J. (1995): HYDRAULIC COMMUNICATION IN CRYSTALLINE ROCK BETWEEN THE TWO BOREHOLES OF THE CONTINENTAL DEEP DRILLING PROJECT IN GERMANY. INT. J. ROCK MECH. MIN. SCI. &GEOMECH. ABSTR., 32, 37 47

  18. COMPARATIVE STUDY OF THE CHEMICAL COMPOSITION OF RAIN OF THREE DIFFERENT ZONES IN MEXICO

    Microsoft Academic Search

    ARMANDO P. BAEZ; RAUL BELMONT

    A comparative study of the precipitation chemistry of three different zones in Mexico was undertaken. The first zone corresponded to a highly polluted urban area, the second, was a predominantly agricultura1 region and the third, was a coastal zone where the biggest petrochemical complex of the country is located. Results of this regional study were shown to be conditioned by

  19. Temperate Oceans : Light Zones

    NSDL National Science Digital Library

    2007-12-12

    This reference provides an overview of the three zones into which the ocean can be divided based on the amount of light recieved: the sunlit (or euphotic) zone, the twilight (or disphotic) zone, and the midnight (or aphotic) zone. The descriptions are accompanied by diagrams and a brief listing of the organisms that live in each zone.

  20. Syllabus Chemistry 1225

    E-print Network

    Simons, Jack

    Syllabus Chemistry 1225 Summer 2013 Instructor: David Thomas: You must obtain a copy of the Chemistry 1225 lab manual Experiments in General Chemistry Featuring MeasureNet® from the University Bookstore, 2nd

  1. Computational Chemistry List

    NSDL National Science Digital Library

    The Computational Chemistry List (CCL) was established as an independent electronic forum for chemistry researchers and educators from around the world. The discussions cover all aspects of computational chemistry.

  2. Science Update: Inorganic Chemistry

    ERIC Educational Resources Information Center

    Rawls, Rebecca

    1978-01-01

    This first in a series of articles describing the state of the art of various branches of chemistry reviews inorganic chemistry, including bioinorganic, photochemistry, organometallic, and solid state chemistries. (SL)

  3. Tech Job Connection Connecting employers and potential

    E-print Network

    Tech Job Connection Connecting employers and potential employees across Washington's Mid) Tech Job Connection could be for you. Tech Job Connection is a web-based listing of resumes and job level of growth and profitability. How does the Tech Job Connection work? Employers and individuals

  4. Spatial Variation in Bed-material Load as Captured by Dune-form Analysis and its Connection to Geomorphology of the Backwater Zone on the Trinity River, East TX, USA

    NASA Astrophysics Data System (ADS)

    Mason, J.; Smith, V. B.; Mohrig, D. C.

    2014-12-01

    Recent observations made in the Trinity River of East Texas reveal that systematic spatial changes in bedform geometry, coverage, and inferred activity correlate with documented shifts in the larger-scale geomorphology of the river. Acoustic imaging data was collected through the transition into the backwater zone, or the reach of river where flow is affected by hydraulic readjustment between quasi-uniform flow further upstream and gradually varying flow towards the river mouth. Measurements collected immediately following a minor flood record spatial changes in bedforms with dune height systematically decreasing from roughly 0.4 m to 0.2 m and dune length decreasing from 13.4 m to 7.3 m, maintaining a constant value of 29 for the ripple index over a 6 km reach that covers 7 river bends. It appears that bedform height is depth-limited within the quasi-uniform flow, and gradually shifts to occupy a smaller fraction of the increasing flow depth within the backwater zone. Over the same reach after a period of extended low river discharge, dune height decreases from 0.3 m to 0, while dune length decreases from 9.0 m to 4.4 m before dunes are completely absent. Ripple index stays relatively constant until the last two bends, a streamwise distance of 2 km, where it rapidly increases from a value of 30 to 44 in the 6th bend and then to infinity in the 7th most downstream bend. Accompanying the disappearance of the dune forms is a systematic reduction in the slopes of their lee faces until the bed is completely flat. The location of these shifts in bed-material load coincides nicely with and likely accounts for documented geomorphic changes to the river, including a reduction in point bar surface area and volume and a decrease in channel-bend migration rates (Smith, 2012). Results have obvious implications for understanding coastal fluvial geomorphology and can help elucidate relationships between bedforms, bed-material load, point bars, and river bend kinematics.

  5. Tropospheric Chemistry

    NASA Technical Reports Server (NTRS)

    Mohnen, V.

    1984-01-01

    The fundamental processes that control the chemical composition and cycles of the global troposphere and how these processes and properties affect the physical behavior of the atmosphere are examined. The long-term information needs for tropospheric chemistry are: to be able to predict tropospheric responses to perturbations, both natural and anthropogenic, of these cycles, and to provide the information required for the maintenance and effective future management of the atmospheric component of our global life support system. The processes controlling global tropospheric biogeochemical cycles include: the input of trace species into the troposphere, their long-range transport and distribution as affected by the mean wind and vertical venting, their chemical transformations, including gas to particle conversion, leading to the appearance of aerosols or aqueous phase reactions inside cloud droplets, and their removal from the troposphere via wet (precipitation) and dry deposition.

  6. Science Update: Inorganic Chemistry.

    ERIC Educational Resources Information Center

    Rawls, Rebecca

    1981-01-01

    Describes areas of inorganic chemistry which have changed dramatically in the past year or two, including photochemistry, electrochemistry, organometallic complexes, inorganic reaction theory, and solid state chemistry. (DS)

  7. The middle intertidal zone

    NSDL National Science Digital Library

    Katie Hale (California State University, Fullerton; Student, Biological Sciences)

    2007-01-04

    The middle intertidal zone is submerged during high tide and only exposed during low tides. This zone has the most moderate conditions of the zones and has many algae, sea anemones, mollusks, and crustaceans.

  8. The upper intertidal zone

    NSDL National Science Digital Library

    Katie Hale (California State University, Fullerton; Student, Biological Sciences)

    2007-01-04

    The upper intertidal zone is exposed most of the time and will become submerged only during high tide. This zone is least abundant of the intertidal zones but contains some mollusks, barnacles, and other animals adapted to avoid drying out.

  9. The bottom intertidal zone

    NSDL National Science Digital Library

    Katie Hale (California State University, Fullerton; Student, Biological Sciences)

    2007-01-04

    The bottom intertidal area remains under water except during low tides. This zone is most abundant of the intertidal zones and contains seaweeds and other plants, invertebrates, and fishes. The bottom zone is subject to the most intense wave action.

  10. The bottom intertidal zone

    NSDL National Science Digital Library

    Katie Hale (CSUF; Biological Sciences)

    2007-06-08

    The bottom intertidal area remains under water except during low tides. This zone is most abundant of the intertidal zones and contains seaweeds and other plants, invertebrates, and fishes. The bottom zone is subject to the most intense wave action.

  11. The upper intertidal zone

    NSDL National Science Digital Library

    Katie Hale (CSUF; Biological Sciences)

    2007-06-08

    The upper intertidal zone is exposed most of the time and will become submerged only during high tide. This zone is least abundant of the intertidal zones but contains some mollusks, barnacles, and other animals adapted to avoid drying out.

  12. The middle intertidal zone

    NSDL National Science Digital Library

    Katie Hale (CSUF; Biological Sciences)

    2007-06-08

    The middle intertidal zone is submerged during high tide and only exposed during low tides. This zone has the most moderate conditions of the zones and has many algae, sea anemones, mollusks, and crustaceans.

  13. Art and Chemistry: Designing a Study-Abroad Course

    ERIC Educational Resources Information Center

    Smieja, Joanne A.; D'Ambruoso, Gemma D.; Richman, Robert M.

    2010-01-01

    Three related courses examining the connection between chemistry and art have been developed for study-abroad programs in Florence, Italy, by faculty members at Gonzaga University and Mount Saint Mary's University. These courses are described with the intent of providing a general framework for the development of chemistry and art courses in other…

  14. Visual Experiments Supporting Four Basic Concepts in Chemistry

    Microsoft Academic Search

    François Saint-Antonin

    2003-01-01

    Visual experiments based on color mixing are proposed to illustrate four basic concepts in chemistry. These visual experiments involve connecting liquid puddles of different colors placed on a flat glass surface and observing and describing the phenomena that occur. Employing as nonspecialized a vocabulary as possible, these experiments can be used as part of a general introduction to chemistry.

  15. Creatine Synthesis: An Undergraduate Organic Chemistry Laboratory Experiment

    ERIC Educational Resources Information Center

    Smith, Andri L.; Tan, Paula

    2006-01-01

    Students in introductory chemistry classes typically appreciate seeing the connection between course content and the "real world". For this reason, we have developed a synthesis of creatine monohydrate--a popular supplement used in sports requiring short bursts of energy--for introductory organic chemistry laboratory courses. Creatine monohydrate…

  16. Chemistry Bachelor of Science in Chemistry 4 YEAR TYPICAL

    E-print Network

    Carter, John

    Chemistry Bachelor of Science in Chemistry 4 YEAR TYPICAL PROGRAM OF STUDY 2013-2014 DEGREE OF SCIENCE & ENGINEERING Department of Chemistry | Office: Bannan 516 chemistry@seattleu.edu | www.seattleu.edu/scieng/chemistry

  17. Business Connections

    NSDL National Science Digital Library

    The New York Times On the Web has recently added a new section, Business Connections, to its highly selective collection of Web links. The section provides one-stop shopping for the most authoritative business-related network resources available. For example, the Markets listings include links to all U.S. exchanges, foreign exchanges, and selected market information sites. The Investing section offers a dozen links to general information and a half-dozen more to the top investment companies and trading services such as Merrill Lynch, Paine Webber, and Charles Schwab. Company Information provides traditional sources such as Dun & Bradstreet along with the Web 100--the top US and international companies on the Web. A good selection of business directories is included, in addition to separate listings for business and financial news, banking & finance, and government & public organizations. Note that free registration to The New York Times On the Web is required before entry into any of their pages.

  18. Extreme warming, photic zone euxinia and sea level rise during the Paleocene/Eocene Thermal Maximum on the Gulf of Mexico Coastal Plain; connecting marginal marine biotic signals, nutrient cycling and ocean deoxygenation

    NASA Astrophysics Data System (ADS)

    Sluijs, A.; van Roij, L.; Harrington, G. J.; Schouten, S.; Sessa, J. A.; LeVay, L. J.; Reichart, G.-J.; Slomp, C. P.

    2013-12-01

    The Paleocene/Eocene Thermal Maximum (PETM, ~56 Ma) was a ~200 kyr episode of global warming, associated with massive injections of 13C-depleted carbon into the ocean-atmosphere system. Although climate change during the PETM is relatively well constrained, effects on marine oxygen and nutrient cycling remain largely unclear. We identify the PETM in a sediment core from the US margin of the Gulf of Mexico. Biomarker-based paleotemperature proxies (MBT/CBT and TEX86) indicate that continental air and sea surface temperatures warmed from 27-29 °C to ~35 °C, although variations in the relative abundances of terrestrial and marine biomarkers may have influenced the record. Vegetation changes as recorded from pollen assemblages supports profound warming. Lithology, relative abundances of terrestrial vs. marine palynomorphs as well as dinoflagellate cyst and biomarker assemblages indicate sea level rise during the PETM, consistent with previously recognized eustatic rise. The recognition of a maximum flooding surface during the PETM changes regional sequence stratigraphic interpretations, which allows us to exclude the previously posed hypothesis that a nearby fossil found in PETM-deposits represents the first North American primate. Within the PETM we record the biomarker isorenieratane, diagnostic of euxinic photic zone conditions. A global data compilation indicates that deoxygenation occurred in large regions of the global ocean in response to warming, hydrological change, and carbon cycle feedbacks, particularly along continental margins, analogous to modern trends. Seafloor deoxygenation and widespread anoxia likely caused phosphorus regeneration from suboxic and anoxic sediments. We argue that this fuelled shelf eutrophication, as widely recorded from microfossil studies, increasing organic carbon burial along continental margins as a negative feedback to carbon input and global warming. If properly quantified with future work, the PETM offers the opportunity to assess the biogeochemical effects of enhanced phosphorus regeneration, as well as the time-scales on which this feedback operates in view of modern and future ocean deoxygenation.

  19. Structuring the Liberal (Arts) Education in Chemistry

    Microsoft Academic Search

    Brian P. Coppola; Douglas S. Daniels

    1996-01-01

    Following the tenets of a re-integrative philosophical framework for curriculum design and educational objectives, we provide strategies that describe our effort to change the educational experience of beginning college students in introductory chemistry. We focus on the explicit connection between instructional goals and practices. For instructors and students, whom we view as collaborators in learning, we address how mental models

  20. Root Apex Transition Zone As Oscillatory Zone

    PubMed Central

    Baluška, František; Mancuso, Stefano

    2013-01-01

    Root apex of higher plants shows very high sensitivity to environmental stimuli. The root cap acts as the most prominent plant sensory organ; sensing diverse physical parameters such as gravity, light, humidity, oxygen, and critical inorganic nutrients. However, the motoric responses to these stimuli are accomplished in the elongation region. This spatial discrepancy was solved when we have discovered and characterized the transition zone which is interpolated between the apical meristem and the subapical elongation zone. Cells of this zone are very active in the cytoskeletal rearrangements, endocytosis and endocytic vesicle recycling, as well as in electric activities. Here we discuss the oscillatory nature of the transition zone which, together with several other features of this zone, suggest that it acts as some kind of command center. In accordance with the early proposal of Charles and Francis Darwin, cells of this root zone receive sensory information from the root cap and instruct the motoric responses of cells in the elongation zone. PMID:24106493

  1. The 'wired' universe of organic chemistry.

    PubMed

    Grzybowski, Bartosz A; Bishop, Kyle J M; Kowalczyk, Bartlomiej; Wilmer, Christopher E

    2009-04-01

    The millions of reactions performed and compounds synthesized by organic chemists over the past two centuries connect to form a network larger than the metabolic networks of higher organisms and rivalling the complexity of the World Wide Web. Despite its apparent randomness, the network of chemistry has a well-defined, modular architecture. The network evolves in time according to trends that have not changed since the inception of the discipline, and thus project into chemistry's future. Analysis of organic chemistry using the tools of network theory enables the identification of most 'central' organic molecules, and for the prediction of which and how many molecules will be made in the future. Statistical analyses based on network connectivity are useful in optimizing parallel syntheses, in estimating chemical reactivity, and more. PMID:21378798

  2. Trace Chemistry

    NASA Technical Reports Server (NTRS)

    Radhakrishnan, Krishnan; Whitefield, Philip

    1999-01-01

    The goals of the trace chemistry group were to identify the processes relevant to aerosol and aerosol precursor formation occurring within aircraft gas turbine engines; that is, within the combustor, turbine, and nozzle. The topics of discussion focused on whether the chemistry of aerosol formation is homogeneous or heterogeneous; what species are important for aerosol and aerosol precursor formation; what modeling/theoretical activities to pursue; what experiments to carry out that both support modeling activities and elucidate fundamental processes; and the role of particulates in aerosol and aerosol precursor formation. The consensus of the group was that attention should be focused on SO2, SO3, and aerosols. Of immediate concern is the measurement of the concentration of the species SO3, SO2, H2SO4 OH, HO2, H2O2, O, NO, NO2, HONO, HNO3, CO, and CO2 and particulates in various engines, both those currently in use and those in development. The recommendation was that concentration measurements should be made at both the combustor exit and the engine exit. At each location the above species were classified into one of four categories of decreasing importance, Priority I through IV, as follows: Combustor exit: Priority I species - SO3:SO2 ratio, SO3, SO2, and particulates; Priority II species: OH and O; Priority III species - NO and NO2; and Priority IV species - CO and CO2. For the Engine exit: Priority I species - SO3:SO2 ratio, SO3, SO2,H2SO4, and particulates; Priority II species: OH,HO2, H2O2, and O; Priority III species - NO, NO2, HONO, and HNO3; and Priority IV species - CO and CO2. Table I summarizes the anticipated concentration range of each of these species. For particulate matter, the quantities of interest are the number density, size distribution, and composition. In order to provide data for validating multidimensional reacting flow models, it would be desirable to make 2-D, time-resolved measurements of the concentrations of the above species and, in addition, of the pressure, temperature, and velocity. A near term goal of the experimental program should be to confirm the nonlinear effects of sulfur speciation, and if present, to provide an explanation for them. It is also desirable to examine if the particulate matter retains any sulfur. The recommendation is to examine the effects on SOx production of variations in fuel-bound sulfur and aromatic content (which may affect the amount of particulates formed). These experiments should help us to understand if there is a coupling between particulate formation and SO, concentration. Similarly, any coupling with NOx can be examined either by introducing NOx into the combustion air or by using fuel-bound nitrogen. Also of immediate urgency is the need to establish and validate a detailed mechanism for sulfur oxidation/aerosol formation, whose chemistry is concluded to be homogeneous, because there is not enough surface area for heterogeneous effects. It is envisaged that this work will involve both experimental and theoretical programs. The experimental work will require, in addition to the measurements described above, fundamental studies in devices such as flow reactors and shock tubes. Complementing this effort should be modeling and theoretical activities. One impediment to the successful modeling of sulfur oxidation is the lack of reliable data for thermodynamic and transport properties for several species, such as aqueous nitric acid, sulfur oxides, and sulfuric acid. Quantum mechanical calculations are recommended as a convenient means of deriving values for these properties. Such calculations would also help establish rate constants for several important reactions for which experimental measurements are inherently fraught with uncertainty. Efforts to implement sufficiently detailed chemistry into computational fluid dynamic codes should be continued. Zero- and one-dimensional flow models are also useful vehicles for elucidating the minimal set of species and reactions that must be included in two- and three-dimensional modeling studies.

  3. Chemistry and Chemical Biology

    E-print Network

    Linhardt, Robert J.

    Chemistry and Chemical Biology AT RENSSELAER ONE WORD To Drive Discovery -- RENSSELAER What is the best Chemistry Ph.D. program for you? Choosing the right Ph.D. Chemistry program depends on many interests, we encourage you consider the Department of Chemistry and Chemical Biology at Rensselaer. WHY

  4. ACS Green Chemistry Institute

    NSDL National Science Digital Library

    This special feature page from the American Chemical Society (ACS) showcases the up-and-coming field of "green chemistry," that is, the development of chemical products and processes that eliminate or reduce the use and generation of hazardous substances. A list of principles behind green chemistry, a searchable bibliography of green chemistry references, and green chemistry links (including conferences). This page comes from ACS's Green Chemistry Project, a three-year educational project to develop and disseminate green chemistry educational materials for graduate and undergraduate chemistry students.

  5. Delights of Chemistry

    NSDL National Science Digital Library

    Developed by the University of Leeds, the Delights of Chemistry promotes the art of chemistry demonstrations. Users can find illustrations and explanations of forty chemistry experiments. Many animations of demonstrations including the magnesium lamp, thermite reaction, and the volcano reaction are available. The website is full of pictures of chemistry equipment and scientists at work. Through this site, students and educators are able to explore fun chemistry experiments without having to worry about the many hazards associated with working with chemicals.

  6. Hydraulic Tomography for Detecting Fracture Zone

    Microsoft Academic Search

    Yonghong Hao; Tian-Chyi J. Yeh; J ianwei Xiang; A. Illman; K enichi Ando

    Fracture zones and their connectivity in geologic media are of great importance to ground water resources management as well as ground water contamination prevention and remediation. In this paper, we applied a recently developed hydraulic tomography (HT) technique and an analysis algorithm (sequential successive lin- ear estimator) to synthetic fractured media. The application aims to explore the potential utility of

  7. Legendre Functions Quantum Chemistry: Chemistry 180-345A

    E-print Network

    Ronis, David M.

    Legendre Functions Quantum Chemistry: Chemistry 180-345A In class we showed that the the angular Fall 2003 #12;Quantum Chemistry -2- Chemistry 180-345A which is divergent at x = ±1 (i.e., at = 0 Chemistry -3- Chemistry 180-345A Hydrogen orbitals for l = 0, 1 Fall 2003 #12;Quantum Chemistry -4

  8. Industrial Chemistry and School Chemistry: Making Chemistry Studies More Relevant

    ERIC Educational Resources Information Center

    Hofstein, Avi; Kesner, Miri

    2006-01-01

    In this paper, we present the development and implementation over the period of more than 15 years of learning materials focusing on industrial chemistry as the main theme. The work was conducted in the Department of Science Teaching at the Weizmann Institute of Science, Israel. The project's general goal was to teach chemistry concepts in the…

  9. Chemistry Rocks: Redox Chemistry as a Geologic Tool.

    ERIC Educational Resources Information Center

    Burns, Mary Sue

    2001-01-01

    Applies chemistry to earth science, uses rocks in chemistry laboratories, and teaches about transition metal chemistry, oxidation states, and oxidation-reduction reactions from firsthand experiences. (YDS)

  10. MChem (Single Honours Degrees) Chemistry with External Placement

    E-print Network

    Brierley, Andrew

    with Mathematics MSci (Joint Honours Degree) Chemistry and Physics BSc (Single Honours Degrees) Chemistry Chemistry62 Chemistry MChem (Single Honours Degrees) Chemistry Chemistry with External Placement Chemistry with Medicinal Chemistry Chemistry with Medicinal Chemistry and External Placement Materials Chemistry Materials

  11. TU KAISERSLAUTERN DEPARTMENT OF CHEMISTRY

    E-print Network

    Madlener, Klaus

    ............................................................................................44 PHYSICAL CHEMISTRY: Prof. Dr. M. Gerhards ....................................................................................................46 PHYSICAL CHEMISTRY: Prof. Dr. Dr. G. Niedner-Schatteburg...............................................................................48 PHYSICAL CHEMISTRY: PD Dr. C. Riehn ...........................................................................

  12. Morphological contrast enhancement using connected transformations

    NASA Astrophysics Data System (ADS)

    Mendiola-Santibanez, Jorge D.; Terol-Villalobos, Ivan R.

    2002-05-01

    In this work a connected approach for morphological contrast enhancement is proposed. The morphological contrast is based on the notion of toggle mappings. The notion of toggle mappings progressed in the way suggested by the Kramer and Bruckner (KB) algorithm. Since the KB algorithm uses the erosion and the dilation as patterns, some problems in this transformation are the oscillations and jumps produced when it is iterated. In our case, both transformations (erosion and dilation) were used in a separated way to built a family of filters, called morphological slope filters (MSF). This allows a better control of the output image. However, sometimes the MSF are sensible to some configurations of the blurred edge. This inconvenience can be attenuated using a connected approach of MSF. Since a connected operator does not split components of the level sets, then connected operators must act on the level of flat zones rather than on pixel level. The notion of flat zone allows the attenuation in sensibility of the MSF. The interest of the use of connected transformations in contrast enhancement is illustrated when a modified version of the KB algorithm is tested and by comparing idempotent toggles using flat zone and pixel notions.

  13. A model of hollow cathode plasma chemistry

    NASA Technical Reports Server (NTRS)

    Katz, I.; Anderson, J. R.; Polk, J. E.; Brophy, J. R.

    2002-01-01

    We have developed a new model of hollow cathode plasma chemistry based on the observation that xenon ion mobility is diffusion limited due to resonant charge exchange reactions. The model shows that vapor phase barium atoms are ionized almost immediately and electric fields accelerate the ions upstream from the emission zone. We have also applied the model to the orifice region, where the resultant ion generation profile correlates with previously reported orifice erosion.

  14. Special Report: Brain Chemistry.

    ERIC Educational Resources Information Center

    Krassner, Michael B.

    1983-01-01

    Chemical actions in the brain result in cognitive, emotional, neuroendocrine, neuromuscular, and/or neurocirculatory effects. Developments in understanding brain chemistry are discussed, considering among others, neurotransmitter chemistry, neuropeptides, drugs and the brain, antidepressants, and actions of minor tranquilizers. (JN)

  15. Igniting Chemistry in Fireworks

    NSDL National Science Digital Library

    WGBH Educational Foundation

    2004-01-29

    Students learn about the concepts of spectral chemistry, combustion, and the nature of fire through the use of visually rich fireworks resources. Optional resources address chemical reactions for those who want a more advanced chemistry lesson.

  16. An Introduction to Chemistry: Nuclear Chemistry

    NSDL National Science Digital Library

    Mark Bishop

    This cost-free resource is a chapter from a textbook on introductory chemistry, developed for learners with little background in physics or chemistry. This chapter deals with the atomic nucleus and radiation, nuclear energy, and uses of radioactive substances. It is appropriate for teachers seeking additional content knowledge, high school physics and chemistry courses, and college-level preparatory chemistry. It builds a foundation to understand the physical forces in the nucleus (electrostatic force and strong force), and explains how chemical reactions differ from nuclear reactions. Graphs and diagrams depict what happens in radioactive decay. The section on chemical nuclear equations is straightforward and comprehensible for non-scientists. This collection is part of An Introduction to Chemistry, a set of resources developed by Mark Bishop which includes two textbooks, 15 animated tutorials, downloadable Power Point presentations for teachers, concept maps, and 3D molecular models.

  17. Chemistry -Bachelor of Science (SCH) Chemistry: ACS Certified

    E-print Network

    Chemistry - Bachelor of Science (SCH) Chemistry: ACS Certified Total Credits Required: 128 Required of the following courses Course Credits CH 1110 University Chemistry I 4 Course Credits AND CH 4110 Pharmaceutical Chemistry I 3 CH 1111 University Chemistry Lab I 1 CH 4120 Pharmaceutical Chemistry II 3 OR CH 4320

  18. Chemistry -Bachelor of Science (SCH) Chemistry: ACS Certified

    E-print Network

    Chemistry - Bachelor of Science (SCH) Chemistry: ACS Certified Total Credits Required: 128 Required of the following courses Course Credits CH 1150 University Chemistry I AND 3 Course Credits CH 1151 University Chemistry Lab I AND 1 CH 4110 Pharmaceutical Chemistry I 3 CH 1153 University Chemistry I Recitation 1 CH

  19. B.A. DEGREE REQUIREMENTS FOR CHEMISTRY (CHEMISTRY TRACK)

    E-print Network

    Doyle, Robert

    ) CHE 346: Physical Chemistry Lecture I (3) CHE 347: Physical ­ Analytical Chemistry Laboratory (2) CHE 356: Physical Chemistry Lecture II (3) CHE 357: Physical Chemistry Laboratory (2) AND CHE 335 (1) CHE 427: Intermediate Organic Chemistry (3) CHE 436: Advanced Physical Chemistry (3) CHE 467

  20. The Chemistry Hypermedia Project

    NSDL National Science Digital Library

    These materials and documents are typical of those presented in an undergraduate course in general chemistry, analytical chemistry, and analytical instrumentation. Resources for educators include Excel spreadsheet simulations for analytical and physical chemistry, prototype JavaScripts and PERL scripts, lists of web workshops and publications, and links to the most recent papers and presentations from the Chemistry Hypermedia Project. There are also tutorials for equilibrium practice problems and analytical spectroscopy.

  1. Chemistry and Chemical Engineering

    E-print Network

    Paxton, Anthony T.

    2011 SCHOOL OF Chemistry and Chemical Engineering Information for Candidates APPOINTMENT OF PROFESSOR OF CHEMICAL ENGINEERING #12;#12;SCHOOL OF Chemistry and Chemical Engineering 3 Thank you for your 6-7 School of Chemistry and Chemical Engineering 8-9 Staff Profiles 10-11 Queen's and Northern

  2. CHEMISTRY 12500 Stephen Hoffmann

    E-print Network

    Jiang, Wen

    CHEMISTRY 12500 Fall 2014 Instructor Stephen Hoffmann Office = ARMS 1343 Phone = 765-494-5740 Email@purdue.edu Required Course Materials · Chemistry: The Molecular Nature of Matter and Change, 6th Edition, by M. S. Silberberg, McGraw-Hill, 2014. [ISBN: 978-1-2593-79567] · Chemistry 12500 Laboratory Manual, Fall 2014

  3. CHEMISTRY 12600 Spring 2014

    E-print Network

    Jiang, Wen

    CHEMISTRY 12600 Spring 2014 Professor Professor Gabriela C. Weaver WTHR laboratory each week. Required Course Materials Chemistry: The Molecular Nature of Matter and Change, 6th Ed., by M. S. Silberberg, McGraw-Hill, 2012. [ISBN: 978-0-07-340265-9] Chemistry 126 Laboratory

  4. Chemistry 171 Instructors

    E-print Network

    Chemistry 171 Fall 2004 Instructors Dr. George C. Schatz (lecturer) Nano 4018 (491-5657) schatz edition by Peter Atkins and Loretta Jones. General Chemistry Laboratory Manual, Stipes Publishing. Available through PLU (student chemistry group) or the Norris Center Bookstore: Laboratory notebook ­ must

  5. Chemistry & Biology Perspective

    E-print Network

    Williams, Loren

    Chemistry & Biology Perspective The Origin of RNA and ``My Grandfather's Axe'' Nicholas V. Hud,1,* Brian J. Cafferty,1 Ramanarayanan Krishnamurthy,2 and Loren Dean Williams1 1School of Chemistry, Atlanta, GA 30332, USA 2Department of Chemistry, The Scripps Research Institute, La Jolla, CA 92037, USA

  6. CHEMISTRY 450 Spring, 2009

    E-print Network

    Stuart, Steven J.

    CHEMISTRY 450 Spring, 2009 Gautam Bhattacharyya, 363 Hunter Labs, phone: 656-1356 gautamb. This course does NOT have a separate laboratory meeting time. Course Goals CH 450 is the Chemistry Capstone course intended for chemistry majors in their final year of study. The main objectives for this course

  7. Chemistry for a SUSTAINABLE

    E-print Network

    Selloni, Annabella

    Viewpointt Chemistry for a SUSTAINABLE FUTURE MIGUEL GARCIA-GARIBAY UNIVERSITY OF CALIFORNIA LOS ON SUSTAINABIL- ITY AND CHEMISTRY, MAY 30­JUNE 1, 2006, ARLINGTON, VA. VICKI H. GRASSIAN (CO-CHAIR) UNIVERSITY innovations do we need to achieve the goal of a sustainable future? Chemistry, a branch of science that deals

  8. Chemistry on Stamps.

    ERIC Educational Resources Information Center

    Schreck, James O.

    1986-01-01

    Suggests how postage stamps can be incorporated into chemistry teaching. Categories considered include emergence of chemistry as a science, metric system, atoms (and molecules and ions), stoichiometry, energy relationships in chemical systems, chemical bonding, nuclear chemistry, biochemistry, geochemistry, matter (gases, liquids, and solids),…

  9. Analytical chemistry instrumentation

    SciTech Connect

    Laing, W.R.

    1986-01-01

    In nine sections, 48 chapters cover 1) analytical chemistry and the environment 2) environmental radiochemistry 3) automated instrumentation 4) advances in analytical mass spectrometry 5) fourier transform spectroscopy 6) analytical chemistry of plutonium 7) nuclear analytical chemistry 8) chemometrics and 9) nuclear fuel technology.

  10. Analytical chemistry instrumentation

    SciTech Connect

    Laing, W.R. (ed.)

    1986-01-01

    Separate abstracts were prepared for 48 papers in these conference proceedings. The topics covered include: analytical chemistry and the environment; environmental radiochemistry; automated instrumentation; advances in analytical mass spectrometry; Fourier transform spectroscopy; analytical chemistry of plutonium; nuclear analytical chemistry; chemometrics; and nuclear fuel technology. (LEW)

  11. Green Chemistry and Education.

    ERIC Educational Resources Information Center

    Hjeresen, Dennis L.; Schutt, David L.; Boese, Janet M.

    2000-01-01

    Many students today are profoundly interested in the sustainability of their world. Introduces Green Chemistry and its principles with teaching materials. Green Chemistry is the use of chemistry for pollution prevention and the design of chemical products and processes that are environmentally benign. (ASK)

  12. Mechanisms in Photographic Chemistry

    ERIC Educational Resources Information Center

    Sahyun, M. R. V.

    1974-01-01

    Reviews current research interests in photographic chemistry, involving two proposed models for spectral sensitization of crystal defects and impurities in the photolysis reactivity and the mechanisms of development and complexation. Establishment of photographic chemistry in a chemistry curriculum is recommended. (CC)

  13. Chemistry For Kids.

    ERIC Educational Resources Information Center

    Smith, Patricia J., Ed.

    1985-01-01

    Desribes a chemistry course (taught in summer for graduate credit) for K-6 teachers to help promote teaching of chemistry as an experimental science at the elementary school level. Also describes another chemistry course for elementary school teachers, focusing on the laboratory component and experiments. (JN)

  14. 33 CFR 165.515 - Safety Zone: Cape Fear River, Wilmington, North Carolina.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...2013-07-01 false Safety Zone: Cape Fear River, Wilmington, North Carolina. 165... § 165.515 Safety Zone: Cape Fear River, Wilmington, North Carolina. (a...zone: (1) The waters of the Cape Fear River bounded by a line connecting the...

  15. 33 CFR 165.515 - Safety Zone: Cape Fear River, Wilmington, North Carolina.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...2014-07-01 false Safety Zone: Cape Fear River, Wilmington, North Carolina. 165... § 165.515 Safety Zone: Cape Fear River, Wilmington, North Carolina. (a...zone: (1) The waters of the Cape Fear River bounded by a line connecting the...

  16. 33 CFR 165.515 - Safety Zone: Cape Fear River, Wilmington, North Carolina.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...2012-07-01 false Safety Zone: Cape Fear River, Wilmington, North Carolina. 165... § 165.515 Safety Zone: Cape Fear River, Wilmington, North Carolina. (a...zone: (1) The waters of the Cape Fear River bounded by a line connecting the...

  17. 33 CFR 165.515 - Safety Zone: Cape Fear River, Wilmington, North Carolina.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...2011-07-01 false Safety Zone: Cape Fear River, Wilmington, North Carolina. 165... § 165.515 Safety Zone: Cape Fear River, Wilmington, North Carolina. (a...zone: (1) The waters of the Cape Fear River bounded by a line connecting the...

  18. 50 CFR Table 51 to Part 679 - Modified Gear Trawl Zone

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...Modified Gear Trawl Zone 51 Table 51 to Part 679 Wildlife and Fisheries...ZONE OFF ALASKA Pt. 679, Table 51 Table 51 to Part 679—Modified Gear Trawl Zone...00 W 60 06.15 N Note: The area is delineated by connecting...

  19. 50 CFR Table 51 to Part 679 - Modified Gear Trawl Zone

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...Modified Gear Trawl Zone 51 Table 51 to Part 679 Wildlife and Fisheries...ZONE OFF ALASKA Pt. 679, Table 51 Table 51 to Part 679—Modified Gear Trawl Zone...00 W 60 06.15 N Note: The area is delineated by connecting...

  20. 50 CFR Table 51 to Part 679 - Modified Gear Trawl Zone

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...Modified Gear Trawl Zone 51 Table 51 to Part 679 Wildlife and Fisheries...ZONE OFF ALASKA Pt. 679, Table 51 Table 51 to Part 679—Modified Gear Trawl Zone...00 W 60 06.15 N Note: The area is delineated by connecting...

  1. 50 CFR Table 51 to Part 679 - Modified Gear Trawl Zone

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...Modified Gear Trawl Zone 51 Table 51 to Part 679 Wildlife and Fisheries...ZONE OFF ALASKA Pt. 679, Table 51 Table 51 to Part 679—Modified Gear Trawl Zone...00 W 60 06.15 N Note: The area is delineated by connecting...

  2. Fresnel zone interferometric imaging

    Microsoft Academic Search

    D. J. Brady; D. L. Marks; R. Stack

    1998-01-01

    We describe how Fourier analysis in projective coordinates allows inversion in the Fresnel zone. Since the longitudinal resolution of 3D coherence imaging falls inversely in the square of range in both the Fresnel and Fraunhofer zones, extension to the Fresnel zone dramatically improves longitudinal resolution by removing far-field range constraints in Michelson rotational shear interferometry

  3. Figure This: Time Zones

    NSDL National Science Digital Library

    2004-01-01

    This is an activity featuring a time zone map useful when teaching an interdisciplinary social studies and math unit focusing on geography and the time zones. It underscores the role of the earth's rotation in everyday life, and the need to understand the relationships between earth rotation, day and night, and time zones around the world.

  4. Zone Refining by Laser

    NASA Technical Reports Server (NTRS)

    Griner, D. B.

    1986-01-01

    System developed for studying use of laser beam for zone-refining semiconductors and metals. Specimen scanned with focused CO2 laser beam in such way that thin zone of molten material moves along specimen sweeps impurities with it. Zone-melting system comprises microcomputer, laser, electromechanical and optical components for beam control, vacuum chamber that holds specimen, and sensor for determining specimen temperature.

  5. Chemflex Overview: Common Chemistry core

    E-print Network

    Napier, Terrence

    see above Path A 28 see above and the following: 21 (for concentration) CHM 343 1 Physical chemistry laboratory CHM 341 4 Physical chemistry I CHM 342 4 Physical chemistry II CHM 334 3 Advanced chemistry Advanced chemistry elective BS Chemistry - Analytical/Physical Concentration Course Number Number

  6. Alcohol, Chemistry and You

    NSDL National Science Digital Library

    Developed by Kennesaw State University, ChemCases.com is a series of curriculum units that link responsible decision making in product development with chemical principles taught in college General Chemistry. Alcohol, Chemistry and You, by Dr. Bill Boggan, is the latest offering by the Web site, which "looks at the chemistry of beverage alcohol (ethyl alcohol) through the eyes of a General Chemistry student." The fourteen chapter lessons cover everything from what ethyl alcohol is to alcohol addiction, relating it to various principles learned in a general chemistry course.

  7. Main zones of the intertidal zone

    NSDL National Science Digital Library

    Katie Hale (California State University, Fullerton; Student, Biological Sciences)

    2007-01-04

    The intertidal zone is found where the tides rise and fall daily, alternatively submerging and exposing the shore to ocean water. Organisms must be able to tolerate times of intense sunlight, little moisture, and wave forces.

  8. Main zones of the intertidal zone

    NSDL National Science Digital Library

    Katie Hale (CSUF; Biological Sciences)

    2007-06-08

    The intertidal zone is found where the tides rise and fall daily, alternatively submerging and exposing the shore to ocean water. Organisms must be able to tolerate times of intense sunlight, little moisture, and wave forces.

  9. A General Chemistry Assignment Analyzing Environmental Contamination for the Depue, IL, National Superfund Site

    ERIC Educational Resources Information Center

    Saslow Gomez, Sarah A.; Faurie-Wisniewski, Danielle; Parsa, Arlen; Spitz, Jeff; Spitz, Jennifer Amdur; Loeb, Nancy C.; Geiger, Franz M.

    2015-01-01

    The classroom exercise outlined here is a self-directed assignment that connects students to the environmental contamination problem surrounding the DePue Superfund site. By connecting chemistry knowledge gained in the classroom with a real-world problem, students are encouraged to personally connect with the problem while simultaneously…

  10. Connections Transport Layer

    E-print Network

    Ramkumar, Mahalingam

    Processes - application layer Could be connection oriented pr connectionless Example - TCP, connection Connections TCP UDP Connection Oriented Service Reliable delivery of data In the right order Acknowledged oriented UDP - connectionless More similar to DL layer than Network layer - why? Ramkumar TL Services

  11. Connections Transport Layer

    E-print Network

    Ramkumar, Mahalingam

    to upper layer Processes - application layer Could be connection oriented pr connectionless Example - TCP, connection oriented UDP - connectionless More similar to DL layer than Network layer - why? Ramkumar TL #12;Services Connections TCP UDP Connection Oriented Service Reliable delivery of data In the right order

  12. Reassessment of the Bahamas Fracture Zone

    SciTech Connect

    Ball, M.M. (Geological Survey, Evergreen, CO (United States))

    1991-03-01

    The Bahamas Fracture Zone trends northwestward across south Florida and the Western Florida shelf, and it appears to connect with the Gilbertown-Pickens-Pollard portion of the circum-Gulf of Mexico fault system. Along the fracture zone's trend, seismic reflection data reveal normal displacement in the Late Jurassic section of a kilometer, on a down-to-the-west fault, 9 km east of the east end of Destin dome in the Apalachicola basin. This fault was active in Late Jurassic and Early Cretaceous time during the gulf spreading event. The Middle Jurassic Louann Salt thins abruptly to the east across this fault. Toward the southeast, where the fracture zone crosses the Florida peninsula, gravity data have previously been interpreted to indicate coincidence of the Bahamas Fracture Zone with a hinge zone attended by relief on the Mohorovicic discontinuity. This interpretation is an artifact resulting from the use of erroneously low densities for the sedimentary fill of the South Florida basin. The inclusion of a nonexistent negative component for the basin's sedimentary fill necessitated the inclusion of an equally nonexistent positive contribution from relief on the Moho in order to match the observed anomaly. Although northwestward-trending faults do cross south Florida and the Western Florida shelf, the role of the Bahamas Fracture Zone as a boundary between continental and transitional or oceanic crust is insupportable.

  13. Comets: chemistry and chemical evolution.

    PubMed

    Donn, B

    1982-01-01

    Lasting commitment to cosmic chemistry and an awareness of the fascinating role of comets in that study was a consequence of an association with Harold Urey early in my astronomical career. Urey's influence on cometary research spread as colleagues with whom I was associated, in turn, developed their own programs in cometary chemistry. One phase of the Chicago research shows that Whipple's icy nucleus would be below about 250 K. This property, combined with their small internal pressure, means cometary interiors remain essentially unchanged during their lifetime. Observations of cometary spectra indicate that they are rich in simple organic species. Experiments on comet-like ice mixture suggests that the extensive array of interstellar molecules also may be found in comets. The capture of cometary debris by the earth or the impact of comets would have been an early source of biochemically significant molecules. Recent hypotheses on radiogenic heating and melting of water ice in the central zone of nuclei do not seem consistent with recent observations or ideas of structure. Thus comets are not a likely place for life to develop. PMID:7097774

  14. Chemistry and quality of groundwater in a coastal region of Andhra Pradesh, India

    NASA Astrophysics Data System (ADS)

    Rao, N. Subba; Vidyasagar, G.; Surya Rao, P.; Bhanumurthy, P.

    2014-11-01

    The chemistry of groundwater in the coastal region between Chirala and Ongole of Andhra Pradesh, India shows pollution to varying extent. The relative contribution of ions in six zones divided based on TDS indicates unsuitability of groundwater here for drinking, irrigation and industrial use. The water is brackish except in first zone and further alkaline. TDS is less than 1,000 mg/L in first zone, while it is more in other zones. This classification of groundwater into zones is also investigated by hydrogeochemical facies, genetic classification, mechanisms of groundwater chemistry and geochemical signatures. Hydrogeochemical facies of Na+>Mg2+>Ca2+: {{HCO}}3^{ - } > Cl- > SO 4^{2 - } is observed from zone I, while that of Na+>Mg2+>Ca2+:Cl- > HCO 3^{ - } > SO 4^{2 - } from second to sixth zones. The genetic classification of groundwater in first and second zones is HCO 3^{ - } type and supported by good drainage conditions, while zones III to VI belong to Cl- category evident from poor drainage scenario. The location of six zones on mechanisms of groundwater chemistry supports sluggish drainage conditions of second to six zones, while predominate rock-water interaction in first zone. The geochemical signatures (HCO 3^{ - } :Cl- > 1 and Na+:Cl- < 1) also endorse the pollution. The quantities of chemical species (Mg2+, Na+, K+, HCO 3^{ - } , Cl ^{ - } , SO 4^{2 - } , NO 3^{ - } and F ^{ - } ) and TDS in all zones are far greater than the stipulated limits for drinking. The United States Salinity Laboratory plots discriminated the suitability of groundwater in second to sixth zones for irrigation after only special soil treatment. Higher concentrations of TDS, HCO 3^{ - } , Cl- and SO 4^{2 - } in all zones render it unsuitable for industry too. This information is crucial for public and civic authorities for taking up strategic management plan for preventing further deterioration of hydrogeochemical environmental conditions of this part of the coastal region.

  15. Computer model of secondary system water chemistry. [MOSSC code

    Microsoft Academic Search

    P. J. Prabhu; S. L. Jones; A. D. MacArthur

    1983-01-01

    In a steam cycle power plant poor water chemistry contributes to steam generator tube corrosion. Dissolved oxygen is believed to be one of the main contributors to corrosion. Leakage of air into the secondary system can occur in sub-atmospheric zones such as the condenser. Measures are taken to remove oxygen before the water enters the steam generator. This paper describes

  16. Atmospheric Chemistry of Venus-like Exoplanets Laura Schaefer

    E-print Network

    Fegley Jr., Bruce

    - 1 - Atmospheric Chemistry of Venus-like Exoplanets by Laura Schaefer and Bruce Fegley, Jr for chemical equilibria between the atmosphere and lithosphere, as on Venus. The results of our calculations Venus. These are planets that have shorter periods than the star's habitable zone (HZ), and therefore

  17. Atmospheric Chemistry of Venus-like Exoplanets Laura Schaefer

    E-print Network

    Fegley Jr., Bruce

    - 1 - Atmospheric Chemistry of Venus-like Exoplanets by Laura Schaefer and Bruce Fegley, Jr the atmosphere and lithosphere, as on Venus. The results of our calculations place constraints on abundances Venus. These are planets that have shorter periods than the star's habitable zone (HZ), and therefore

  18. B.A. DEGREE REQUIREMENTS FOR CHEMISTRY (BIOLOGICAL CHEMISTRY TRACK)

    E-print Network

    Doyle, Robert

    326: Organic Chemistry Laboratory II (2) CHE 474: Structural and Physical Biochemistry I (3) 2: Intermediate Organic Chemistry (3) CHE 436: Advanced Physical Chemistry (3) CHE 467: Introduction to PhysicalB.A. DEGREE REQUIREMENTS FOR CHEMISTRY (BIOLOGICAL CHEMISTRY TRACK) Requirements include 21 credits

  19. Capillary zone electrophoresis-mass spectrometer interface

    DOEpatents

    D`Silva, A.

    1996-08-06

    A device for providing equal electrical potential between two loci unconnected by solid or liquid electrical conductors is provided. The device comprises a first electrical conducting terminal, a second electrical conducting terminal connected to the first terminal by a rigid dielectric structure, and an electrically conducting gas contacting the first and second terminals. This device is particularly suitable for application in the electrospray ionization interface between a capillary zone electrophoresis apparatus and a mass spectrometer. 1 fig.

  20. Uncertainty in integrated coastal zone management

    Microsoft Academic Search

    Henriëtte S. Otter

    2000-01-01

    Uncertainty plays a major role in Integrated Coastal Zone Management (ICZM). A large part of this uncertainty is connected\\u000a to our lack of knowledge of the integrated functioning of the coastal system and to the increasing need to act in a pro-active\\u000a way. Increasingly, coastal managers are forced to take decisions based on information which is surrounded by uncertainties.\\u000a Different

  1. Introduction to Ocean Zones

    NSDL National Science Digital Library

    COSEE West

    2012-01-01

    In this activity, learners will create a diagram of the ocean zones and determine what organisms live in each zone. Learners will draw the appropriate scale to demark meters (and conversion to feet) from 0-6000m and draw the zones that correspond to the geological structures of the ocean basin. Finally, learners will use their critical thinking skills to determine where in the ocean each organism lives and place the organism in the habitat that is within the limitations for survival.

  2. Chemistry 365 Useful Information

    E-print Network

    Ronis, David M.

    Chemistry 365 Quiz II Useful Information kB = 1. 380662 × 10-23 J/K h = 6. 6256 × 10-27 erg sec how your expression changes if you were to use HD instead of H2. March 20, 2002 #12;Chemistry 365 -2.11 * From, G. W. Castellan, Physical Chemistry What would the order be in the high temperature limit? Why? 4

  3. Middle School Chemistry

    NSDL National Science Digital Library

    Middle school science resource from ACS. It includes activity-based lesson plans for teaching basic chemistry concepts that cover all the main concepts in middle school chemistry. Each lesson also contains integrated animations and video that a teacher can use to help explain student observations on the molecular level. Online professional development will also be available to introduce and familiarize teachers with the demonstrations, activities, and chemistry content in the site.

  4. Science Update: Analytical Chemistry.

    ERIC Educational Resources Information Center

    Worthy, Ward

    1980-01-01

    Briefly discusses new instrumentation in the field of analytical chemistry. Advances in liquid chromatography, photoacoustic spectroscopy, the use of lasers, and mass spectrometry are also discussed. (CS)

  5. The Chemistry of Cocaine

    NSDL National Science Digital Library

    Brahmadeo Dewprashad

    2010-01-01

    This case study on the chemistry of cocaine is in the form of a classroom discussion between a professor and her students about cocaine, its addictive properties, a search for an addiction treatment, and the chemistry involved in the synthesis of cocaine in its various forms. The case can be used to teach nucleophilic addition reactions, nucleophilic acyl substitution, and cocaine metabolism. In addition, it provides students with experience in locating, reading, and analyzing a research paper.  The case was designed for the second course in a two-course sequence in undergraduate organic chemistry, but it could be adapted for medicinal chemistry classes.

  6. BachelorofScience/BachelorofEducation Chemistry/ScienceEducation

    E-print Network

    Morris, Joy

    - Organic Chemistry II ___ 6. Chemistry 2740 - Physical Chemistry List B - Elective Chemistry - Contemporary Chemistry ___Chemistry 3410 - Analytical Chemistry II ___Chemistry 3730 - Advanced PhysicalBachelorofScience/BachelorofEducation Chemistry/ScienceEducation This is a planning guide

  7. An ultrastructural study of connective tissue in mollusc integument: II. Gastropoda

    Microsoft Academic Search

    A. Bairati; M. Comazzi; M. Gioria

    2001-01-01

    We studied the ultrastructure of the subepidermal connective tissue (SEC) in different zones of the integument in terrestrial, marine and freshwater gastropods (eight species). In all cases, the SEC was a layer of loose connective tissue between the basal membrane (BM) of the epidermis and the connective tissue of the deeper muscle layers. It was of monotonous structure and not

  8. Emerald mineralisation in Colombia: fluid chemistry and the role of brine mixing

    Microsoft Academic Search

    D. A. Banks; G. Giuliani; B. W. D. Yardley; A. Cheilletz

    2000-01-01

    Emerald mineralisation in Colombia is located in two distinct zones along the borders of the Eastern Cordillera, some 80?km\\u000a apart. Mineralisation in the western zone has been dated at ca. 35?Ma whereas in the eastern zone it is 30?Ma older. Crush\\u000a leach analysis of the electrolyte chemistry of fluid inclusions contained in emerald, quartz, calcite, dolomite and fluorite\\u000a from both

  9. For Immediate Release --Thursday, October 25, 2012 Spooky Science Night connects kids to science

    E-print Network

    Morris, Joy

    connects kids to science Kids (and parents): Do not try this at home-year master's student (Chemistry), ignites a chemical compound inside a pumpkin generation -- kids aged 5 ­ 12 -- followed by some captivating and explosive

  10. Float Zone Workshop

    NASA Technical Reports Server (NTRS)

    Naumann, R. J.

    1980-01-01

    A summary of the Analytical Float Zone Experiment System (AFZES) concept is presented. The types of experiments considered for such a facility are discussed. Reports from various industrial producers and users of float zone material are presented. Special emphasis is placed on state-of-the-art developments in low gravity manufacturing and their applications to space processing.

  11. Microgravity silicon zoning investigation

    NASA Technical Reports Server (NTRS)

    Kern, E. L.; Gill, G. L., Jr.

    1983-01-01

    A resistance heated zoner, suitable for early zoning experiments with silicon, was designed and put into operation. The initial power usage and size was designed for an shown to be compatible with payload carriers contemplated for the Shuttle. This equipment will be used in the definition and development of flight experiments and apparatus for float zoning silicon and other materials in microgravity.

  12. Climate Zones Robinson Projection

    E-print Network

    Columbia University

    Climate Zones Africa ´Robinson Projection Copyright 2007. The Trustees of Columbia University University. Population, Landscape, and Climate Estimates (PLACE). Further information available at: http://sedac.ciesin.columbia.edu/place/ Publish Date: 03/13/07 0 500 km Climate zones were taken from the Köppen Climate Classification map

  13. Undifferentiated Connective Tissue Disease

    MedlinePLUS

    ... vessels. Examples of connective tissue diseases include lupus , scleroderma , rheumatoid arthritis , Sjögren's syndrome , myositis , and vasculitis . There ... connective tissue diseases, such as lupus, Sjögren's or scleroderma. More UCTD Information Causes Diagnosis Symptoms Treatment Print ...

  14. Basic Chemistry Review

    NSDL National Science Digital Library

    Thomas Meixner

    This assignment reviews basic of chemistry for students who should have had 2 introductory semesters of basic chemistry prior to enrolling in the Fundamental of Water Quality course for which the assignment is used. Assignment reviews basic equation balancing and questions about valence and concentration conversion that students will confront regularly in any geochemistry course.

  15. Chemistry & Biology Brief Communication

    E-print Network

    Miranker, Andrew

    Chemistry & Biology Brief Communication A Peptidomimetic Approach to Targeting Pre Avenue, New Haven, CT 06520-8114, USA 2Department of Chemistry, Yale University, 225 Prospect Street, P., 1999). These amyloid plaques are composed primarily of fibers formed from islet amyloid polypep- tide

  16. Stratospheric chemistry and transport

    NASA Technical Reports Server (NTRS)

    Prather, Michael; Garcia, Maria M.

    1990-01-01

    A Chemical Tracer Model (CTM) that can use wind field data generated by the General Circulation Model (GCM) is developed to implement chemistry in the three dimensional GCM of the middle atmosphere. Initially, chemical tracers with simple first order losses such as N2O are used. Successive models are to incorporate more complex ozone chemistry.

  17. Chemistry 365 Useful Information

    E-print Network

    Ronis, David M.

    Chemistry 365 Quiz II Useful Information kB = 1. 380662 × 10-16 erg/K h = 6. 6256 × 10-27 erg sec homonuclear diatomic molecules. Assume that the nuclei have spin 1. March 18, 1994 over... #12;Chemistry 365

  18. Macromolecular Chemistry and Physics

    E-print Network

    Guo, John Zhanhu

    , Mansfield Road, Oxford, OX1 3TA, United Kingdom L. Sun Department of Chemistry and Biochemistry, Texas State2429 Full Paper Macromolecular Chemistry and Physics wileyonlinelibrary.com Macromol. Chem. Phys Wang, Luyi Sun, Zhanhu Guo* PP nanocomposites containing different carbon nanofillers (CNTs, CNFs, Gn

  19. Chemistry for Fuel Cells

    NSDL National Science Digital Library

    This presentation provides a basic introduction to the chemistry involved with fuel cell technology. The material covers chemical bonds, some basic atomic properties, the Noble Gas Theory and how the chemistry of fuel cells works.This document may be downloaded in Microsoft PowerPoint file format.

  20. Chemistry and Biology

    ERIC Educational Resources Information Center

    Wigston, David L.

    1970-01-01

    Discusses the relationship between chemisty and biology in the science curriculum. Points out the differences in perception of the disciplines, which the physical scientists favoring reductionism. Suggests that biology departments offer a special course for chemistry students, just as the chemistry departments have done for biology students.…

  1. WATER CHEMISTRY ASSESSMENT METHODS

    EPA Science Inventory

    This section summarizes and evaluates the surfce water column chemistry assessment methods for USEPA/EMAP-SW, USGS-NAQA, USEPA-RBP, Oho EPA, and MDNR-MBSS. The basic objective of surface water column chemistry assessment is to characterize surface water quality by measuring a sui...

  2. Sawyer Environmental Chemistry Research

    E-print Network

    Thomas, Andrew

    1 Sawyer Environmental Chemistry Research Laboratory Sawyer Environmental Research Center University of Maine #12;2 Mission Statement The Sawyer Environmental Chemistry Research Laboratory is a multi- disciplinary facility for environmental research and education at the University of Maine. The lab provides

  3. Environmental Chemistry Library

    NSDL National Science Digital Library

    This is an "everything" site for the teaching of environmental chemistry. The site contains some unique case studies, a list of textbooks, lab and modeling activities and other educational content. The content is still in development, but the material provided would be helpful in developing a unit or course on environmental chemistry.

  4. General Chemistry Online

    NSDL National Science Digital Library

    This educational site features: A searchable database of over 800 common compound names; Hyperlinked notes for first semester general chemistry; Interactive graphing, popup tables, and calculators; an index of self-guided tutorials, quizzes, and drills on specific topics; a searchable glossary; and a Chemistry Exam Survival Guide

  5. Power connect safety and connection interlock

    NASA Technical Reports Server (NTRS)

    Rippel, Wally E. (Inventor)

    1992-01-01

    A power connect safety and connection interlock system is shown for use with inverters and other DC loads (16) which include capacitor filter banks (14) at their DC inputs. A safety circuit (20) operates a spring (26) biased, solenoid (22) driven mechanical connection interference (24) which prevents mating and therefore electrical connection between the power contactor halves (11, 13) of the main power contacts (12) until the capacitor bank is safely precharged through auxiliary contacts (18). When the DC load (16) is shut down, the capacitor bank (14) is automatically discharged through a discharging power resistor (66) by a MOSFET transistor (60) through a discharging power resistor (66) only when both the main power contacts and auxiliary contacts are disconnected.

  6. Evolution of shear zones in granular materials

    E-print Network

    Balazs Szabo; Janos Torok; Ellak Somfai; Sandra Wegner; Ralf Stannarius; Axel Bose; Georg Rose; Frank Angenstein; Tamas Borzsonyi

    2014-08-07

    The evolution of wide shear zones (or shear bands) was investigated experimentally and numerically for quasistatic dry granular flows in split bottom shear cells. We compare the behavior of materials consisting of beads, irregular grains (e.g. sand) and elongated particles. Shearing an initially random sample, the zone width was found to significantly decrease in the first stage of the process. The characteristic shear strain associated with this decrease is about unity and it is systematically increasing with shape anisotropy, i.e. when the grain shape changes from spherical to irregular (e.g. sand) and becomes elongated (pegs). The strongly decreasing tendency of the zone width is followed by a slight increase which is more pronounced for rod like particles than for grains with smaller shape anisotropy (beads or irregular particles). The evolution of the zone width is connected to shear induced density change and for nonspherical particles it also involves grain reorientation effects. The final zone width is significantly smaller for irregular grains than for spherical beads.

  7. Organic Chemistry Resources Worldwide

    NSDL National Science Digital Library

    Van Aken, Koen

    1996-01-01

    Organic Chemistry Worldwide is an excellent organic chemistry metasite that is not to be missed. Geared toward synthetic organic chemists involved in academic or industrial research, Organic Chemistry Resources Worldwide has a mission to collect and independently annotate "all useful organic chemistry sites and to present them in an intuitive way." This extensive metasite is divided into sections on literature, laboratory resources, spectroscopy and spectrometry, nomenclature and teaching, and conferences and organizations. The Literature section contains links to over 75 journals (some restricted access), 14 free databases (and many more commercial), dissertation collections, reviews, guides, patents, and current awareness sources. Examples of resources for laboratory work include links to chemical product databases, laboratory safety bulletins (.pdf), products and services, etc. Highlights of the site are an in-depth section on mass spectrometry, with links to publications and databases, and a plethora of links to organic chemistry labs worldwide, from Armenia to Uruguay.

  8. Vertical Variability in Saturated Zone Hydrochemistry Near Yucca Mountain, Nevada

    SciTech Connect

    G. Patterson; P. Striffler

    2007-02-17

    The differences in the saturated zone hydrochemistry with depth at borehole NC-EWDP-22PC reflect the addition of recharge along Fortymile Wash. The differences in water chemistry with depth at borehole NC-EWDP-19PB appear to indicate that other processes are involved. Water from the lower part of NC-EWDP-19PB possesses chemical characteristics that clearly indicate that it has undergone cation exchange that resulted in the removal of calcium and magnesium and the addition of sodium. This water is very similar to water from the Western Yucca Mountain facies that has previously been thought to flow west of NC-EWDP-19PB. Water from the lower zone in NC-EWDP-19PB also could represent water from the Eastern Yucca Mountain facies that has moved through clay-bearing or zeolitized aquifer material resulting in the altered chemistry. Water chemistry from the upper part of the saturated zone at NC-EWDP-19PB, both zones at NC-EWDP-22PC, and wells in the Fortymile Wash facies appears to be the result of recharge through the alluvium south of Yucca Mountain and within the Fortymile Wash channel.

  9. Art in Chemistry; Chemistry in Art.

    ERIC Educational Resources Information Center

    Greenberg, Barbara R.; Patterson, Dianne

    High school teachers are often challenged to motivate students who have little or no interest in a subject and are bored with traditional instruction. This unique book is designed to help educators make chemistry classes more interesting and links art curriculum to practical applications, integrating the two subjects through scores of hands-on…

  10. Chemistry for Kids: Elementary School Chemistry Activities.

    ERIC Educational Resources Information Center

    Seager, Spencer L.; Swenson, Karen T.

    1987-01-01

    Describes a program in which six experiments in chemistry were used in an elementary school science program. Discusses the problems encountered in initiating the program, and some of the ways the problems were solved. Lists the six experiments, along with the reaction or process being studied, and the application of each. (TW)

  11. Chemistry for Kids: Summer Chemistry for Fun.

    ERIC Educational Resources Information Center

    Hufford, Kevin D.

    1984-01-01

    A five-week course for fourth- and fifth-grade students (titled "Chemistry for Kids") was developed. Each class session consisted of a brief lecture, a demonstration, and one or more experiments. An outline of concepts fostered, instructional strategies, and procedures used is provided. (JN)

  12. Spatial assessment of landscape ecological connectivity in different urban gradient.

    PubMed

    Park, Sohyun

    2015-07-01

    Urbanization has resulted in remnant natural patches within cities that often have no connectivity among themselves and to natural reserves outside the urban area. Protecting ecological connectivity in fragmented urban areas is becoming crucial in maintaining urban biodiversity and securing critical habitat levels and configurations under continual development pressures. Nevertheless, few studies have been undertaken for urban landscapes. This study aims to assess ecological connectivity for a group of species that represent the urban desert landscape in the Phoenix metropolitan area and to compare the connectivity values along the different urban gradient. A GIS-based landscape connectivity model which relies upon ecological connectivity index (ECI) was developed and applied to this region. A GIS-based concentric buffering technique was employed to delineate conceptual boundaries for urban, suburban, and rural zones. The research findings demonstrated that urban habitats and potential habitat patches would be significantly influenced by future urban development. Particularly, the largest loss of higher connectivity would likely to be anticipated in the "in-between areas" where urban, suburban, and rural zones overlap one another. The connectivity maps would be useful to provide spatial identification regarding connectivity patterns and vulnerability for urban and suburban activities in this area. This study provides planners and landscape architects with a spatial guidance to minimize ecological fragmentation, which ultimately leads to urban landscape sustainability. This study suggests that conventional planning practices which disregard the ecological processes in urban landscapes need to integrate landscape ecology into planning and design strategies. PMID:26065890

  13. 16. UPPER PASSENGER LOADING ZONE, NOTE LOADING ZONE BELOW WITH ...

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

    16. UPPER PASSENGER LOADING ZONE, NOTE LOADING ZONE BELOW WITH TURN STILES - Jefferson National Expansion Memorial Arch, Mississippi River between Washington & Poplar Streets, Saint Louis, Independent City, MO

  14. Context-Based Chemistry: Creating Opportunities for Fluid Transitions between Concepts and Context

    ERIC Educational Resources Information Center

    King, Donna

    2009-01-01

    Nationally and internationally, context-based programs have been implemented in an attempt to engage students in chemistry through connecting the canonical science with the real world. In Queensland, a context-based approach to chemistry was trialled in selected schools from 2002 but there is little research that investigates how students learn in…

  15. An Investigation of College Chemistry Students' Understanding of Structure-Property Relationships

    ERIC Educational Resources Information Center

    Cooper, Melanie M.; Corley, Leah M.; Underwood, Sonia M.

    2013-01-01

    The connection between the molecular-level structure of a substance and its macroscopic properties is a fundamental concept in chemistry. Students in college-level general and organic chemistry courses were interviewed to investigate how they used structure-property relationships to predict properties such as melting and boiling points. Although…

  16. Simulation of fluid flow mechanisms in high permeability zones (Super-K) in a giant naturally fractured carbonate reservoir 

    E-print Network

    Abu-Hassoun, Amer H.

    2009-05-15

    the Super-K Zone was investigated. It is known that these zones are connected to naturally occurring fractures. Fluid flow in naturally fractured reservoirs is a very difficult mechanism to understand. To accomplish this mission, the Super-K Zone...

  17. Matthew F. Tuchler Associate Professor of Chemistry

    E-print Network

    Marsh, David

    of Chicago, 1989 Ph.D. in Physical Chemistry, University of Illinois at Urbana, 1995 PROFESSIONAL POSITIONS Chemistry 210 ­ Structure and Reactivity of Molecules Chemistry 261 ­ Physical Chemistry I: Thermodynamics, Kinetics and Statistics Chemistry 262 ­ Physical Chemistry II: Quantum Chemistry and Spectroscopy Chemistry

  18. Moderator Chemistry Program

    SciTech Connect

    Dewitt, L.V.; Gibbs, A.; Lambert, D.P.; Bohrer, S.R.; Fanning, R.L.; Houston, M.W.; Stinson, S.L.; Deible, R.W.; Abdel-Khalik, S.I.

    1990-11-01

    Over the past fifteen months, the Systems Chemistry Group of the Reactor Engineering Department has undertaken a comprehensive study of the Department`s moderator chemistry program at Savannah River Site (SRS). An internal review was developed to formalize and document this program. Objectives were as outlined in a mission statement and action plan. In addition to the mission statement and action plan, nine separate task reports have been issued during the course of this study. Each of these task reports is included in this document as a chapter. This document is an organized compilation of the individual reports issued by the Systems Chemistry Group in assessment of SRS moderator chemistry to determine if there were significant gaps in the program as ft existed in October, 1989. While these reviews found no significant gaps in that mode of operation, or any items that adversely affected safety, items were identified that could be improved. Many of the items have already been dear with or are in the process of completion under this Moderator Chemistry Program and other Reactor Restart programs. A complete list of the items of improvement found under this assessment is found in Chapter 9, along with a proposed time table for correcting remaining items that can be improved for the chemistry program of SRS reactors. An additional external review of the moderator chemistry processes, recommendations, and responses to/from the Reactor Corrosion Mitigation Committee is included as Appendix to this compilation.

  19. Moderator Chemistry Program

    SciTech Connect

    Dewitt, L.V.; Gibbs, A.; Lambert, D.P.; Bohrer, S.R.; Fanning, R.L.; Houston, M.W.; Stinson, S.L.; Deible, R.W.; Abdel-Khalik, S.I.

    1990-11-01

    Over the past fifteen months, the Systems Chemistry Group of the Reactor Engineering Department has undertaken a comprehensive study of the Department's moderator chemistry program at Savannah River Site (SRS). An internal review was developed to formalize and document this program. Objectives were as outlined in a mission statement and action plan. In addition to the mission statement and action plan, nine separate task reports have been issued during the course of this study. Each of these task reports is included in this document as a chapter. This document is an organized compilation of the individual reports issued by the Systems Chemistry Group in assessment of SRS moderator chemistry to determine if there were significant gaps in the program as ft existed in October, 1989. While these reviews found no significant gaps in that mode of operation, or any items that adversely affected safety, items were identified that could be improved. Many of the items have already been dear with or are in the process of completion under this Moderator Chemistry Program and other Reactor Restart programs. A complete list of the items of improvement found under this assessment is found in Chapter 9, along with a proposed time table for correcting remaining items that can be improved for the chemistry program of SRS reactors. An additional external review of the moderator chemistry processes, recommendations, and responses to/from the Reactor Corrosion Mitigation Committee is included as Appendix to this compilation.

  20. Home Connections: Demystifying Mixtures

    NSDL National Science Digital Library

    Kathleen Damonte

    2003-10-01

    The subject of chemistry makes most people think of an elaborate laboratory, but investigating chemistry concepts does not require expensive equipment or chemicals. You can perform some of the same tests scientists do using materials in your home. One topic chemists study is mixtures and the substances that make them up. In this activity you will use a process called chromatography to find out what makes up a mixture you use often: black ink.

  1. Surface Chemistry Research

    NSDL National Science Digital Library

    This Topic in Depth explores the field of surface chemistry. First, the American Chemical Society's (ACS) Division of Colloid and Surface Chemistry publicizes its members initiatives to "investigate the interaction of surfaces with fluids having molecular densities spanning the range from liquids to ultra-high vacuum" (1). Researchers can find out about upcoming meetings, awards, and membership opportunities. The second website presents Chalmers University of Technology's research activities in surfactants and microemulsions, environmental catalysis, fuels engineering, and metal working chemistry (2). Students and teachers can discover the basics of surface chemistry and its benefits to society. Next, University of Canterbury features its studies which "help in the development of portable devices in freshwater analysis, microelectrodes, chemically modified electrodes & biochips for sensors, nanoparticle assemblies for smart materials, [and] novel electrode material for catalysis of industrial processes" (3). Users can view posters detailing their research as well as articles describing the group's latest news and results. Fourth, the US Naval Research Lab describes its surface chemistry research interests, facilities, and its strengths (4). Individuals can find lists of the Lab's journal articles, reports, and technical papers. The fifth website, provided by the University of Virginia, addresses how the chemistry of aerogels makes them "attractive materials for use as catalysts, catalyst substrates, and adsorbents" (5). The website contains illustrations of the interaction between water and aerogel compounds. Sixth, the Environmental Molecular Sciences Laboratory presents its Ultra-high Vacuum (UHV) Surface Chemistry-High-Resolution Electron Energy Loss Spectroscopy (HREELS) System capabilities to "study the molecular-level chemistry of adsorbates on metal oxide surfaces" (6 ). The website offers a concise overview of sample preparation, handling, and manipulation. Lastly, the University of Michigan provides links to in-depth discussions and informational images of the research projects of its four surface chemistry research groups (7). Researchers can find slide show presentations of the group's work, lists of its publications, and information on the individual researchers' education and work. [RME

  2. CHEMISTRY 213B: Introductory Physical Chemistry I. General Information

    E-print Network

    Ronis, David M.

    CHEMISTRY 213B: Introductory Physical Chemistry I. General Information Lectures: MWF 9:30 - 10 Chemistry. Supplementary Texts 1. P. A. Rock, Chemical Thermodynamics. 2. Gordon M. Barrow, Physical Chemistry. 3. R. Kubo, Thermodynamics (Physics orientation, advanced) Grades There will be approximately one

  3. Chemistry Bachelor of Science in Chemistry 2 YEAR TYPICAL

    E-print Network

    Carter, John

    Chemistry Bachelor of Science in Chemistry 2 YEAR TYPICAL PROGRAM OF STUDY 2013-2014 DEGREE completed a full year of General Chemistry, Calculus and Physics. If you have already taken a full year of Organic Chemistry, then your Junior year will be devoted to completing Math and Physics requirements

  4. Chemistry 436/636 Fall 2011 Advanced Physical Chemistry

    E-print Network

    Raina, Ramesh

    Chemistry 436/636 Fall 2011 Advanced Physical Chemistry Instructor: Prof. J. Goodisman 3-014E Sci. 16, 5:15-7:15 PM Text: T. Engel and P. Reid, Physical Chemistry, 2nd Edition (Prentice-Hall, 2010) or any other comprehensive physical chemistry text. Engel & Reid is used in the undergraduate physical

  5. CHEMISTRY 243: Introductory Physical Chemistry II. General Information

    E-print Network

    Ronis, David M.

    CHEMISTRY 243: Introductory Physical Chemistry II. General Information Lectures: Monday & Wednesday, Inc., 2006) J.R. Barrante, Applied Mathematics for Physical Chemistry, 3rd edition (Pearson Education, Inc., 2004) Supplementary Texts 1. G. W. Castellan, Physical Chemistry 3rd edition (Benjamin Cummings

  6. Chemistry 1010 -090 (Online) Chemistry, Humanity, and Environment

    E-print Network

    Simons, Jack

    Chemistry 1010 -090 (Online) Chemistry, Humanity, and Environment 1. Course Content The Online version of Chemistry 1010 (1010-090) supports the aims of the University of Utah General Education Mission Statement: The course has been designed for nonmajors and presupposes no background in chemistry. The course

  7. CHEMISTRY 3023-62170 PHYSICAL CHEMISTRY LABORATORY II

    E-print Network

    Findley, Gary L.

    CHEMISTRY 3023-62170 PHYSICAL CHEMISTRY LABORATORY II Spring 2012 2:00 - 5:00 pm, W CNSB 211.ulm.edu/~findley COURSE Content: Modern experimental techniques of physical chemistry. Goals/ Objectives: Physical for Physical Chemistry Laboratory II is on spectroscopy. REQUIREMENTS Prerequisite: "C" or better in CHEM 3021

  8. CHEMISTRY 3021-42233 PHYSICAL CHEMISTRY LABORATORY I

    E-print Network

    Findley, Gary L.

    CHEMISTRY 3021-42233 PHYSICAL CHEMISTRY LABORATORY I Fall 2011 2:00-2:50, W, CNSB 211 (Prelab) 3.ulm.edu/~findley COURSE Content: Modern experimental techniques of physical chemistry. Goals/ Objectives: Physical for Physical Chemistry Laboratory I is on thermodynamics and chemical kinetics. REQUIREMENTS Prerequisite: "C

  9. B.A. DEGREE REQUIREMENTS FOR CHEMISTRY (BIOLOGICAL CHEMISTRY TRACK)

    E-print Network

    Doyle, Robert

    326: Organic Chemistry Laboratory II (2) CHE 474: Structural and Physical Biochemistry I (3) 2: Organic Chemistry of Biological Molecules (3) CHE 436: Advanced Physical Chemistry (3) CHE 467: Introduction to Physical Chemistry Research Laboratory (3) CHE 546: Molecular Spectroscopy and Structure (1

  10. Materials Chemistry at SFU

    NSDL National Science Digital Library

    The Materials Science group at Simon Fraser University (SFU) developed this website to address the group's primary research interests in material synthesis, molecular, electronics, and photonics. Visitors will find explanations covering sixteen research topics including chemical sensors, lithography, non-linear optics, and supramolecular chemistry. Under each topic heading, users will find links discussing the faculties' current goals, recent publications, and patents. The site also features links to the Pacific Centre for Advanced Materials and Microstructures; a collaborative effort between the Materials Science group at SFU and the physics and chemistry departments at the University of British Columbia. Anyone searching for the latest investigations in materials chemistry will find this website very informative.

  11. Green Chemistry Teaching Resources

    NSDL National Science Digital Library

    The American Chemical Society (ACS) has created these excellent resources via the Green Chemistry Institute and the ACS Education Division. The goal of these materials is "to increase awareness and understanding of Green Chemistry principles, alternatives, practices, and benefits within traditional educational institutions and among practicing scientists." In the Online Resources section, visitors will find downloadable pocket guides to basic green chemistry principles, "Greener Education Materials for Chemists" from the University of Oregon, and more. Perhaps the best section of the site is Activities and Experiments, where visitors can look over activities like "Gassing Up Without Air Pollution" and "Cleaning Up With Atom Economy."

  12. The Chemistry of Cocaine

    NSDL National Science Digital Library

    Dewprashad, Brahmadeo

    This case study looks at cocaine, including its addictive properties and the chemistry involved in the synthesis of the drug in its different forms. The lesson can be used to teach nucleophilic addition reactions, nucleophilic acyl substitution, and cocaine metabolism. The material was designed for use in an undergraduate organic chemistry course but could also be used in medicinal chemistry coursework. The case study and teaching notes may be downloaded in PDF format. The site also includes a section for instructor feedback where general comments may be read and contributed.

  13. TCD-IISc Symposium "Chemistry & Chemical Biology"

    E-print Network

    O'Mahony, Donal E.

    TCD-IISc Symposium "Chemistry & Chemical Biology" Trinity College Clive Williams, Dean of Chemistry. Research areas include supramolecular organic and inorganic chemistry and medicinal chemistry, robotics, structure-function relationships. Sylvia Draper, Professor in Chemistry. Her research spans

  14. The Habitable Zone

    NSDL National Science Digital Library

    2008-03-26

    This illustration is an approximate representation of the planets in our solar system and their relation to what scientists call The Habitable Zone. The planet distances from the sun are measured in Astronomical Units (AU) and are not to scale.

  15. Theory of zone radiometry

    NASA Technical Reports Server (NTRS)

    Farmer, R. C.; Audeh, B. J.

    1973-01-01

    A spectroscopic instrumentation system was developed which was used to measure temperature and concentration distributions in axisymmetric and two dimensional combusting flows. This measurement technique is known as zone radiometry.

  16. Cascadia Subduction Zone

    USGS Publications Warehouse

    Frankel, Arthur D.; Petersen, Mark D.

    2008-01-01

    The geometry and recurrence times of large earthquakes associated with the Cascadia Subduction Zone (CSZ) were discussed and debated at a March 28-29, 2006 Pacific Northwest workshop for the USGS National Seismic Hazard Maps. The CSZ is modeled from Cape Mendocino in California to Vancouver Island in British Columbia. We include the same geometry and weighting scheme as was used in the 2002 model (Frankel and others, 2002) based on thermal constraints (Fig. 1; Fluck and others, 1997 and a reexamination by Wang et al., 2003, Fig. 11, eastern edge of intermediate shading). This scheme includes four possibilities for the lower (eastern) limit of seismic rupture: the base of elastic zone (weight 0.1), the base of transition zone (weight 0.2), the midpoint of the transition zone (weight 0.2), and a model with a long north-south segment at 123.8? W in the southern and central portions of the CSZ, with a dogleg to the northwest in the northern portion of the zone (weight 0.5). The latter model was derived from the approximate average longitude of the contour of the 30 km depth of the CSZ as modeled by Fluck et al. (1997). A global study of the maximum depth of thrust earthquakes on subduction zones by Tichelaar and Ruff (1993) indicated maximum depths of about 40 km for most of the subduction zones studied, although the Mexican subduction zone had a maximum depth of about 25 km (R. LaForge, pers. comm., 2006). The recent inversion of GPS data by McCaffrey et al. (2007) shows a significant amount of coupling (a coupling factor of 0.2-0.3) as far east as 123.8? West in some portions of the CSZ. Both of these lines of evidence lend support to the model with a north-south segment at 123.8? W.

  17. Fractal generalized zone plates

    Microsoft Academic Search

    Omel Mendoza-Yero; Mercedes Fernández-Alonso; Gladys Mínguez-Vega; Jesús Lancis; Vicent Climent; Juan A. Monsoriu

    2009-01-01

    The construction of fractal generalized zone plates (FraGZPs) from a set of periodic diffractive optical elements with circular symmetry is proposed. This allows us to increase the number of foci of a conventional fractal zone plate (FraZP), keeping the self-similarity property within the axial irradiance. The focusing properties of these fractal diffractive optical elements for points not only along but

  18. Napoleon's Buttons: Teaching the Role of Chemistry in History

    ERIC Educational Resources Information Center

    Samet, Cindy; Higgins, Pamela J.

    2005-01-01

    A course designed on the theme of Napoleon's Buttons, which states that there is a connection between the chemical structure of a compound and its pivotal moments in history affecting the development of society is explained. Students liked the book choice for the course because the focus was not on straight chemistry, but the intersection of…

  19. Integrating Symmetry in Stereochemical Analysis in Introductory Organic Chemistry

    ERIC Educational Resources Information Center

    Taagepera, Mare; Arasasingham, Ramesh D.; King, Susan; Potter, Frank; Martorell, Ingrid; Ford, David; Wu, Jason; Kearney, Aaron M.

    2011-01-01

    We report a comparative study using "knowledge space theory" (KAT) to assess the impact of a hands-on laboratory exercise that used molecular model kits to emphasize the connections between a plane of symmetry, Charity, and isomerism in an introductory organic chemistry course. The experimental design compared three groups of students--two that…

  20. Clinical chemistry as scientific discipline: historical perspectives.

    PubMed

    Büttner, J

    1994-12-31

    The fundamental ideas which underlie clinical chemistry as an independent scientific field were formed over the course of centuries. Exactly 200 years ago the first modern concepts for this discipline were formulated in close connection with the restructuring of medical education during the French Revolution on the one hand, and the emergence of a new idea of a 'clinic' on the other hand. However, not until 1840 was clinical chemistry institutionalized as academic subject and simultaneously integrated into medical teaching. After about 1860, clinical chemistry was practiced by the clinicians themselves in close relationship with clinical activities, yet again with emphasis on teaching. In this period, clinics and hospitals established 'clinical laboratories'. With the start of the 20th century, after biochemistry had developed into an independent scientific field, clinical chemistry continued to evolve in close relationship with that latter discipline. This was particularly true in the United States, where an 'American School of Clinical Biochemistry' emerged which was to greatly influence the field. PMID:7720266

  1. Emergences of supramolecular chemistry: from supramolecular chemistry to supramolecular science

    Microsoft Academic Search

    Jacques VicensQuentin Vicens; Quentin Vicens

    We describe the field of supramolecular chemistry as a consequence of the progress of chemistry from its premises to recent\\u000a achievements. Supramolecular chemistry has been claimed to be an emergent field of research taking its roots in chemistry.\\u000a According to the definitions of emergences related to hierarchy or more recently to scope, supramolecular chemistry is shown\\u000a to have bottom-up or

  2. Analytical Chemistry Applied Mathematics

    E-print Network

    Heller, Barbara

    .Admin./Marketing Communication Bus.Admin./Public Admin. Chemical Engineering Chem. Eng./Comp. Sci. Chemistry Civil Engineering Cyber Forensics Data Science Design Methods Electrical Engineering Electrical & Computer Engineering

  3. Magnetism in Chemistry

    ERIC Educational Resources Information Center

    Brookes, R. W.; McFadyen, W. D.

    1975-01-01

    Discusses the technical aspects of paramagnetism and an electrostatic model called Crystal Field Theory (CFT), very often used in the case of transition metal compounds. Suggests that this discussion be included as an option for college chemistry courses. (MLH)

  4. Chemistry with a Peel.

    ERIC Educational Resources Information Center

    Borer, Londa; Larsen, Eric

    1997-01-01

    Presents experiments that introduce natural product chemistry into high school classrooms. In the laboratory activities, students isolate and analyze the oil in orange peels. Students also perform a steam distillation and learn about terpenes. (DDR)

  5. Enzymes in Analytical Chemistry.

    ERIC Educational Resources Information Center

    Fishman, Myer M.

    1980-01-01

    Presents tabular information concerning recent research in the field of enzymes in analytic chemistry, with methods, substrate or reaction catalyzed, assay, comments and references listed. The table refers to 128 references. Also listed are 13 general citations. (CS)

  6. Chemistry Societies Network

    NSDL National Science Digital Library

    Users gain access to the heart of CSN's site through the site gateway which leads them to CSN's information arcade, education arcade, societies, chembytes, and conferences and events. The information arcade provides links to experts and specialists, and chemistry societies. The education arcade contains a wealth of information for educators in the chemistry arena. Societies lists chemical and chemistry-related societies, divided alphabetically by country. Chembytes provides access to a variety of news, including recent findings and discoveries, business updates, and news from around the globe. Chembytes also features a continuing series which looks in-depth at a topic recently in the news. Currently featured is NASA's attempt to return to the moon. Conferences and Events is searchable and browseable and contains a submission form so visitors can list an event. CSN's site also includes Useful Links, a listing of sites categorized and reviewed by Chemsoc and Science Park, which links to four companies offering chemistry related resources on the web.

  7. General Chemistry Multimedia Problems

    NSDL National Science Digital Library

    General Chemistry Multimedia Problems ask students questions about experiments they see presented using videos and images. The questions asked apply concepts from different parts of an introductory course, encouraging students to decompartmentalize the material.

  8. Sequencing General Chemistry

    NSDL National Science Digital Library

    B.J. Yoblinski

    2003-03-01

    The material in the authors' general chemistry curriculum has been rearranged into a sequence thought to be more logical to students than the traditional sequence. This fresh approach does not radically change course content but rather produces a systemat

  9. Chemistry for Kids.

    ERIC Educational Resources Information Center

    Sato, Sanae; Majoros, Bela

    1988-01-01

    Reports two methods for interesting children in chemistry. Describes a method for producing large soap bubbles and films for study. Examines the use of simple stories to explain common chemical concepts with example given. Lists titles of available stories. (ML)

  10. Chemistry 455 Chemical Nanotechnology

    E-print Network

    Rohs, Remo

    Chemistry 455 Chemical Nanotechnology 4 units Prof. Richard Brutchey, Fall 2014 (Lecture = 12:00­12:50 pm MWF) CHEM 455 is an upper-division undergraduate course in Chemical Nanotechnology. The intent

  11. Chemistry and Detective Fiction.

    ERIC Educational Resources Information Center

    Labianca, Dominick A.; Reeves, William J.

    1981-01-01

    Describes an interdisciplinary program consisting of two courses. The first course deals with the chemistry of drugs and poisons; the second course focuses on fictional works in which these drugs and poisons are central to the plots. (SK)

  12. Learn Chemistry: Chemistry Resources for Teachers

    NSDL National Science Digital Library

    The Royal Society of Chemistry has created this most useful website to help teachers and students of chemistry learn about the field via interactive experiments, diagrams, animations, and so on. The site includes over 3,300 resources. Visitors can get started by using the Resource Type tab. Here they can browse through ten different headings, including Worksheet, Quiz, Tutorial, and Podcast. The Experiments area is quite wonderful, as it includes over 340 different experiments that can be conducted in the classroom. A few highlights in this area include "Challenging Medicines: Making Medicines," "The Salt Cellar Mystery," and "Which solution is which?" Overall, it's a tremendous site and one that visitors will want to share with friends.

  13. CHEMISTRY 324W ORGANIC LABORATORY

    E-print Network

    Wagner, Diane

    1 Fall 2010 CHEMISTRY 324W ORGANIC LABORATORY Course Information Title: Chemistry 324W, Organic for multiple chemistry classes) $5 key deposit fee (refunded at end of semester with return of key) Course a scientific paper consistent with the format of the Journal of Organic Chemistry, American Chemical Society. 7

  14. Secondary water chemistry at Oconee

    Microsoft Academic Search

    S. G. Sawochka; W. L. Pearl; M. J. Bell; S. S. Choi

    1984-01-01

    As part of EPRI Program RP704-1, chemistry and OTSG corrosion data for Oconee were evaluated. Utility collected chemistry information was augmented by data collected during short and long term NWT sampling and analysis campaigns. Chemistry generally was controlled within Duke Power specifications; however, significant variations were observed with time and between units. Improvements in feedwater chemistry appear achievable by routing

  15. The Nobel Prize in Chemistry

    NSDL National Science Digital Library

    2001-01-01

    The first hundred years of Nobel Prizes for Chemistry give a beautiful picture of the development of modern chemistry. The prizes cover the whole spectrum of the basic chemical sciences, from theoretical chemistry to biochemistry, and also a number of contributions to applied chemistry.

  16. WESTERN UNIVERSITY DEPARTMENT OF CHEMISTRY

    E-print Network

    Sinnamon, Gordon J.

    WESTERN UNIVERSITY DEPARTMENT OF CHEMISTRY The Department of Chemistry invites applications for a probationary (tenure-track) faculty position at the rank of Assistant Professor in Inorganic Chemistry, externally funded research program, and to develop and teach innovative courses in chemistry

  17. Chem 793 Bibliography Chemistry 793

    E-print Network

    Chem 793 Bibliography Chemistry 793 QUANTUM MECHANICS I Fall 2000 BIBLIOGRAPHY The two volumes. Walter and G.E. Kimball, Quantum Chemistry (Wiley). [13] I. Levine, Quantum Chemistry (Allyn and Bacon). [14] G.C. Schatz and M. Ratner, Quantum Mechanics in Chemistry. [15] J. Simons and J. Nichols, Quantum

  18. EnginEEring ZonE "The Engineering Zone

    E-print Network

    Tobar, Michael

    EnginEEring ZonE "The Engineering Zone will push the limits in collaborative learning and research, and empower people to change the world. "Winthrop Professor John Dell Dean, Faculty of Engineering, Computing and Mathematics #12;2 | nEw CEntury Campaign ­ EnginEEring ZonE #12;nEw CEntury Campaign ­ EnginEEring ZonE | 3

  19. Interpretation of Water Chemistry and Stable Isotope Data from a Karst Aquifer According to Flow Regimes Identified through Hydrograph

    E-print Network

    82 Interpretation of Water Chemistry and Stable Isotope Data from a Karst Aquifer According to Flow regime and chemistry of a major karst groundwater resurgence zone in southwestern Slovenia was examined tool in other karst regions. INTRODUCTION A primary challenge for the management of karst water

  20. Chemistry, Color, and Art

    NASA Astrophysics Data System (ADS)

    Orna, Mary Virginia

    2001-10-01

    Artists' colors have been intertwined with chemistry from antiquity, both in the extraction of them from raw materials and their production by the 'manufacturing chemists' of their day. In our own time, not only has chemistry made possible the enormous expension of the artist's palette, but also has provided methods to study it scientifically with a view to restoration, preservation, authentication, and understanding of works of art.

  1. Organic Chemistry Forum

    NSDL National Science Digital Library

    ChemWeb's Organic Chemistry Forum bills itself as a "free online club for the organic chemistry community." Users will need to complete a simple online form to obtain membership and access the site. One highlight of this site is free full-text access to Tetrahedron Letters. This rapid publication journal appears weekly. Along with free access to Beilstein Abstracts, the site includes jobs, a conference diary, news, discussion groups, and more.

  2. Organic Chemistry Forum

    NSDL National Science Digital Library

    2005-01-01

    ChemWeb's Organic Chemistry Forum bills itself as a "free online club for the organic chemistry community." Users will need to complete a simple online form to obtain membership and access the site. One highlight of this site is free full-text access to Tetrahedron Letters. This rapid publication journal appears weekly. Along with free access to Beilstein Abstracts, the site includes jobs, a conference diary, news, discussion groups, and more.

  3. UCLA: Organic Chemistry Tutorials

    NSDL National Science Digital Library

    Hardinger, Steven

    Steven Hardinger at the Department of Chemistry and Biochemistry at UCLA created these tutorials to assist students with the difficult concepts presented in introductory organic chemistry. Students can find tutorials dealing with acids and bases, carbocations, Lewis dot structures, and more. Within each tutorial, users can find links to a dictionary that adequately explain the unfamiliar terminology. The tutorials include example problems and exercises to challenge users.

  4. Acid-base chemistry

    SciTech Connect

    Hand, C.W.; Blewit, H.L.

    1985-01-01

    The book is not a research compendium and there are no references to the literature. It is a teaching text covering the entire range of undergraduate subject matter dealing with acid-base chemistry (some of it remotely) as taught in inorganic, analytical, and organic chemistry courses. The excellent chapters VII through IX deal in detail with the quantitative aspects of aqueous acid-base equilibria (salt hydrolysis and buffer, titrations, polyprotic and amphoteric substances).

  5. EPA Environmental Chemistry Laboratory

    NASA Technical Reports Server (NTRS)

    1993-01-01

    The Environmental Protection Agency's (EPA) Chemistry Laboratory (ECL) is a national program laboratory specializing in residue chemistry analysis under the jurisdiction of the EPA's Office of Pesticide Programs in Washington, D.C. At Stennis Space Center, the laboratory's work supports many federal anti-pollution laws. The laboratory analyzes environmental and human samples to determine the presence and amount of agricultural chemicals and related substances. Pictured, ECL chemists analyze environmental and human samples for the presence of pesticides and other pollutants.

  6. Chemistry in space research.

    NASA Technical Reports Server (NTRS)

    Landel, R. F. (editor); Rembaum, A.

    1972-01-01

    Chemistry in space is discussed together with aspects of chemistry in planetary atmospheres, the prebiological synthesis of organic compounds, and carbonaceous meteorites as possible sites of extraterrestrial life. Other subjects investigated include terrestrial and extraterrestrial stable organic molecules, thermally stable macromolecules, chemical aspects of ablation, low-temperature relaxations in amorphous polymers, and solid propellants. Liquid propellant rockets are also considered along with questions of spacecraft sterilization. Individual items are announced in this issue.

  7. Numerical Study of Surface Connectivity in the Eastern Mexican Pacific

    NASA Astrophysics Data System (ADS)

    Inda Diaz, H. A.; Pares-Sierra, A.

    2014-12-01

    East boundary ecosystems are the most productive regions in the world and they sustain a large percentage of world fisheries. Understand and describe the connectivity and exchange between different regions of the ocean is very important for larvae dispersion study and other tracers like pollutants. In this work we use an offline numerical model to simulate Lagrangian particle trajectories in the Eastern Mexican Pacific (between 120-94 W and 12-34 N). Particles are advected whit velocity fields generated with the model ROMS (Regional Ocean Modeling System) in the period 1980-2006. We define connectivity indexes in order to classify different zones by their capacity of exporting, receiving and retaining particles. We aim to identify the most transited pathways, quantify connectivity between different regions of EMP through connectivity matrix and describe their seasonal variability. It has been identified zones of high isolation and retention (Vizcaino Bay, Northern of Gulf of California), high retention and importation (between Ensenada and Point Conception) and high exportation and importation (Cabo Corrientes). Connectivity has clear equatoward preference in the California Peninsula region dominated by the influence of California Current with an increase in winter and spring, and also equatoward in the south region of Mexico (from Cabo Corrientes to Tehuantepec Gulf), dominated by the anticyclonic circulation of Tehuantepec Dome. It is observed a complete disconnection between the Baja California Peninsula and Cabo Corrientes zone and further south. Results suggest that the scales of connectivity does not significantly change for simulations over 3 months.

  8. Links between worlds: Unraveling migratory connectivity

    USGS Publications Warehouse

    Webster, M.; Marra, P.P.; Haig, Susan M.; Bensch, S.; Holmes, Richard T.

    2002-01-01

    Migration is the regular seasonal movement of animals from one place to another, often from a breeding site to a nonbreeding site and back. Because the act of migration makes it difficult to follow individuals and populations year round, our understanding of the ecology and evolution of migrating organisms, particularly birds, has been severely impeded. Exciting new advances in satellite telemetry, genetic analyses and stable isotope chemistry are now making it possible to determine the population and geographical origin of individual birds. Here, we review these new approaches and consider the relevance of understanding migratory connectivity to ecological, evolutionary and conservation issues.

  9. Public Displays of Connection

    Microsoft Academic Search

    Judith Donath; D Boyd

    2004-01-01

    Participants in social network sites create self-descriptive profiles that include their links to other members, creating a visible network of connections — the ostensible purpose of these sites is to use this network to make friends, dates, and business connections. In this paper we explore the social implications of the public display of one's social network. Why do people display

  10. Reading and Writing Connections.

    ERIC Educational Resources Information Center

    Mason, Jana M., Ed.

    This collection of papers, from a conference on reading and writing connections held at the University of Illinois in October 1986, reflects the value of demonstrating connections between reading instruction and writing. The book shows practitioners how writing can be blended with reading instruction and how writing activities can be used not just…

  11. Artificial limb connection

    NASA Technical Reports Server (NTRS)

    Owens, L. J.

    1974-01-01

    Connection simplifies and eases donning and removing artificial limb; eliminates harnesses and clamps; and reduces skin pressures by allowing bone to carry all tensile and part of compressive loads between prosthesis and stump. Because connection is modular, it is easily modified to suit individual needs.

  12. Real World Graph Connectivity

    ERIC Educational Resources Information Center

    Lind, Joy; Narayan, Darren

    2009-01-01

    We present the topic of graph connectivity along with a famous theorem of Menger in the real-world setting of the national computer network infrastructure of "National LambdaRail". We include a set of exercises where students reinforce their understanding of graph connectivity by analysing the "National LambdaRail" network. Finally, we give…

  13. Mobile Conference Connection Conferencing

    E-print Network

    Mobile Conference Connection Conferencing · Help increase productivity while out of the office Meeting conference and add participants instantly Business doesn't stop when you're unable to meet, Mobile Conference Connection--our latest mobile device application that enables registered Instant

  14. Umbilical connect systems.

    NASA Technical Reports Server (NTRS)

    Valkema, D.

    1972-01-01

    Umbilical connect systems were studied for the purpose of developing techniques, specifications, and hardware design concepts for prototype systems to be used in the space shuttle program. New techniques are described which permit rapid and reliable mating, connection, and checkout of umbilical carrier assemblies and couplings for vehicle services (cryogenic, electrical, pneumatic, and hydraulic systems).

  15. Use of Doceri Software for iPad in Online Delivery of Chemistry Content

    ERIC Educational Resources Information Center

    Silverberg, Lee J.; Tierney, John; Bodek, Matthew J.

    2014-01-01

    Doceri software for iPad is useful for both synchronous online and asynchronous online delivery of chemistry course content. Using the Doceri wireless connection between the iPad and a personal computer that is running Adobe Connect, online synchronous instruction can be accomplished in which drawings can be completed by hand on the iPad. For…

  16. Updated May 2012 Chemistry Degree Requirements

    E-print Network

    Cina, Jeff

    (Majors) 399 342 343 Organic Chemistry Lab 337 338 339 Physical Chemistry 411 412 413 Physical Chemistry courses at the 400-level in Chemistry, Geology and Physics Option 2) One approved course at the 400-level Computational Chemistry CH 410 Physical Organic Chemistry I CH 410 Inorganic Chemistry CH 431 Bioinorganic

  17. Updated September 2012 Chemistry Degree Requirements

    E-print Network

    Cina, Jeff

    Chemistry (Majors) 341 342 343 Organic Chemistry Lab 337 348* 349* Physical Chemistry 411 412 413 Physical approved courses at the 400-level in Chemistry, Geology and Physics Option 2) One approved course Winter Spring Computational Chemistry CH 410 Physical Organic Chemistry I CH 410 Inorganic Chemistry CH

  18. Technetium Chemistry in HLW

    SciTech Connect

    Hess, Nancy J.; Felmy, Andrew R.; Rosso, Kevin M.; Xia Yuanxian

    2005-06-06

    Tc contamination is found within the DOE complex at those sites whose mission involved extraction of plutonium from irradiated uranium fuel or isotopic enrichment of uranium. At the Hanford Site, chemical separations and extraction processes generated large amounts of high level and transuranic wastes that are currently stored in underground tanks. The waste from these extraction processes is currently stored in underground High Level Waste (HLW) tanks. However, the chemistry of the HLW in any given tank is greatly complicated by repeated efforts to reduce volume and recover isotopes. These processes ultimately resulted in mixing of waste streams from different processes. As a result, the chemistry and the fate of Tc in HLW tanks are not well understood. This lack of understanding has been made evident in the failed efforts to leach Tc from sludge and to remove Tc from supernatants prior to immobilization. Although recent interest in Tc chemistry has shifted from pretreatment chemistry to waste residuals, both needs are served by a fundamental understanding of Tc chemistry.

  19. Practical Chemistry: Nuffield Foundation

    NSDL National Science Digital Library

    Young people and others should know about the foundations of modern chemistry and this novel site from the Nuffield Foundation provides a nice mixture of resources to accomplish this goal. The Foundation partnered with the Royal Society of Chemistry (RSC) to create this trove, which visitors will find easy to use and navigate. As the authors describe it, these practical activities are designed to "enable students to apply and extend their knowledge and understanding of chemistry in novel investigative situations." It's important to browse the Topics area, as this contains sections like States of Matter, Bonding, structure, properties, Analysis, Energy and entropy, and The Earth and atmosphere. The great thing about these activities is that they are self-contained, and they require only a modest investment in actual materials and educational background. Finally, the Standard Techniques area will help visitors learn some lab basics, including the heating of various substances, using thermometers properly, and the correct use of a Bunsen burner.

  20. Science360: Chemistry

    NSDL National Science Digital Library

    Have you ever wondered about the chemistry of a cheeseburger? Well you are in luck because that is one of the subjects covered on the topical and delightful "Chemistry" section of the popular Science360 website. As it states on the site, "everything you hear, see, taste, smell and touch involves chemistry and chemicals", and here visitors can watch videos and learn about the molecular structure of water, the science behind glass blowing, and how a curious mud-like mixture is being used to soak up oil spills and insulate homes. Currently, there are about fifteen videos on the site, and visitors can sign up via a host of social media (Twitter, Facebook, and so on), to stay abreast of new additions to the site. Teachers will find that this material can be integrated into the classroom quite easily, and everyone else will just enjoy wandering through these offerings.

  1. Chemistry Laboratory Techniques

    NSDL National Science Digital Library

    Learning to navigate the treacherous shoals of the chemistry laboratory is tricky business. Fortunately, interested parties can use this fine online course from MIT's OpenCourseWare to become more familiar with such matters. The course consists of "intensive practical training in basic chemistry lab techniques" and the site includes a host of instructional videos. The manual and materials for this course were prepared by Dr. Katherine J. Franze and Dr. Kevin M. Shea in collaboration with a number of their colleagues. Visitors can make their way through the syllabus, course calendar, labs, and the study materials. In the Study Materials area, visitors will find ten videos, including "Using a Balance," "Melting Point Determination," and "Thin-Layer Chromatography." Students of chemistry and educators will find this site most useful and will wish to share it widely with others.

  2. Uranium triamidoamine chemistry.

    PubMed

    Gardner, Benedict M; Liddle, Stephen T

    2015-07-01

    Triamidoamine (Tren) complexes of the p- and d-block elements have been well-studied, and they display a diverse array of chemistry of academic, industrial and biological significance. Such in-depth investigations are not as widespread for Tren complexes of uranium, despite the general drive to better understand the chemical behaviour of uranium by virtue of its fundamental position within the nuclear sector. However, the chemistry of Tren-uranium complexes is characterised by the ability to stabilise otherwise reactive, multiply bonded main group donor atom ligands, construct uranium-metal bonds, promote small molecule activation, and support single molecule magnetism, all of which exploit the steric, electronic, thermodynamic and kinetic features of the Tren ligand system. This Feature Article presents a current account of the chemistry of Tren-uranium complexes. PMID:26035690

  3. 2-connected graphs with small 2-connected dominating sets

    E-print Network

    Yuster, Raphael

    2-connected graphs with small 2-connected dominating sets Yair Caro, Raphael Yuster 1 Department. A subset D of V (G) is a 2-connected dominating set if every vertex of G has a neighbor in D and D induces a 2-connected subgraph. Let 2(G) denote the minimum size of a 2-connected dominating set of G. Let (G

  4. ChemConnections

    NSDL National Science Digital Library

    The mission of our program was: To develop new curricula, materials and methods to enhance the appreciation and learning of science, especially chemistry, for every undergraduate student such that all college graduates will command the knowledge and skills necessary to permit continued learning, to lead productive lives, and to make informed decisions.

  5. K?lauea's Upper East Rift Zone: A Rift Zone in Name Only

    NASA Astrophysics Data System (ADS)

    Swanson, D. A.; Fiske, R. S.

    2014-12-01

    K?lauea's upper east rift zone (UERZ) extends ~3 km southeastward from the summit caldera to the Koáe fault system, where it starts to bend into the main part of the ENE-trending rift zone. The UERZ lacks a distinct positive gravity anomaly (though coverage is poor) and any evidence of deformation associated with magma intrusion. All ground ruptures—and the Puhimau thermal area—trend ENE, crossing the UERZ at a high angle. Lua Manu, Puhimau, and Kóokóolau craters are the only surface evidence of the UERZ. Yet the UERZ is seismically active, and all magma entering the rest of the rift zone must pass through it. Rather than a rift zone in the traditional sense, with abundant dikes and ground ruptures along its trend, the UERZ cuts across the ENE structural grain and serves only as a connector to the rest of the rift zone, not a locus of dike formation along its length. The UERZ probably developed as a consequence of gradual SSE migration of the active part of the main east rift zone at the trailing edge of the south flank. During migration, a connection to the summit reservoir complex must be maintained; otherwise, the middle and lower east rift zone would starve and magma from K?lauea's summit reservoir complex would have to go elsewhere. Over time, the UERZ lengthened and rotated clockwise to maintain the connection. Near the caldera, the UERZ may be widening westward as the summit reservoir complex migrates southward from the center of the caldera to its present position. A layered stress regime results in the upper 2-3 km mimicking the pervasive ENE structural grain of most of K?lauea, whereas the underlying magmatic part of the UERZ responds to stresses related to SE magma transport. Magma intruding upward from the connector forms a dike that follows the ENE structural grain, as during the 1974 eruption. The active east rift zone has been migrating since ~100 ka, estimated by applying a 700-y extension rate across the Koa'e fault system to the ~6.5 km of migration, and presumably the UERZ connector has been developing during this time.

  6. CHEMISTRY 1220 General Chemistry II Syllabus Course Description

    E-print Network

    Simons, Jack

    ourselves. Instructors Dr. Charles H. Atwood MWF 11:50 AM ­ 12:40 PM Classroom HEB 2008 North Henry Eyring Henry Eyring Chemistry Building, Rm. 1011 (801) 581-7288 Textbooks Required: CHEMISTRY AN ATOMS FIRST

  7. Physical Chemistry II Spring 2007 Physical Chemistry II

    E-print Network

    Physical Chemistry II Spring 2007 Physical Chemistry II Chem 390 Syllabus www.chem.cornell.edu/gse1. Entropy and spontaneity. Calculation and measurement of entropy changes. IV. Free energy and spontaneity

  8. Chemistry for Kids: Chemistry Activities for a Summer Enrichment Program.

    ERIC Educational Resources Information Center

    Schreck, James O.; And Others

    1984-01-01

    Describes chemistry courses offered as part of a residential summer enrichment program held at the University of Northern Colorado. A list of elementary and advanced chemistry activities completed during the courses is included. (JN)

  9. PESTICIDE ROOT ZONE MODEL

    EPA Science Inventory

    PRZM3 is a modeling system that links two subordinate models - PRZM and VADOFT to predict pesticide transport and transformation down through the crop root and unsaturated zone. PRZM3 includes modeling capabilities for such phenomena as soil temperature simulation, vo...

  10. Deformation Zone Analysis

    NSDL National Science Digital Library

    2014-09-14

    The quick analysis of deformation zones provides an overview of system-relative atmospheric circulations. Since deformation is a primary factor in frontogenesis and frontolysis, understanding of these system-relative circulations is crucial to the diagnosis of atmospheric processes and weather prediction. This module is part of the series: "Dynamic Feature Identification: The Satellite Palette".

  11. Coastal zone: a symposium

    Microsoft Academic Search

    S. B. Collard; L. W. Skelton

    1977-01-01

    This Symposium had two primary foci: Coastal Biology and Coastal Planning, with emphasis on the Gulf of Mexico coastal region. These categories were further divided into: coastal environment and environmental quality within the biology focus; and coastal zone planning and the management of coastal resources within the planning focus.

  12. Chemistry in cometary comae

    NASA Technical Reports Server (NTRS)

    Irvine, W. M.; Dickens, J. E.; Lovell, A. J.; Schloerb, F. P.; Senay, M.; Bergin, E. A.; Jewitt, D.; Matthews, H. E.

    1998-01-01

    Significant gas-phase chemistry occurs in the comae of bright comets, as is demonstrated here for the case of Comet Hale-Bopp. The abundance ratio of the two isomers, hydrogen cyanide and hydrogen isocyanide, is shown to vary with heliocentric distance in a way that is consistent with production of HNC by ion-molecule chemistry initiated by the photoionization of water. Likewise, the first maps of emission from HCO+ show an abundance and an extended distribution that are consistent with the same chemical model.

  13. Chemistry Open Textbook

    NSDL National Science Digital Library

    This free chemistry textbook from Boundless Learning is based off openly available educational resources such as "government resources, open educational repositories, and other openly licensed websites." The textbook contains 25 chapters such as Introduction to Chemistry, Atoms, Molecules, and Ions, and Mass Relationships and Chemical Equations. The textbook can be browsed on this page or downloaded as a pdf. Students can register for a free Boundless account to access a search engine and other study tools to efficiently find specific topics and master the content.

  14. Chemistry WebBook

    National Institute of Standards and Technology Data Gateway

    SRD 69 NIST Chemistry WebBook (Web, free access)   The NIST Chemistry WebBook contains: Thermochemical data for over 7000 organic and small inorganic compounds; thermochemistry data for over 8000 reactions; IR spectra for over 16,000 compounds; mass spectra for over 33,000 compounds; UV/Vis spectra for over 1600 compounds; electronic and vibrational spectra for over 5000 compounds; constants of diatomic molecules(spectroscopic data) for over 600 compounds; ion energetics data for over 16,000 compounds; thermophysical property data for 74 fluids.

  15. Chemistry of Transactinides

    NASA Astrophysics Data System (ADS)

    Kratz, J. V.

    In this chapter, the chemical properties of the man-made transactinide elements rutherfordium, Rf (element 104), dubnium, Db (element 105), seaborgium, Sg (element 106), bohrium, Bh (element 107), hassium, Hs (element 108), and copernicium, Cn (element 112) are reviewed, and prospects for chemical characterizations of even heavier elements are discussed. The experimental methods to perform rapid chemical separations on the time scale of seconds are presented and comments are given on the special situation with the transactinides where chemistry has to be studied with single atoms. It follows a description of theoretical predictions and selected experimental results on the chemistry of elements 104 through 108, and element 112.

  16. Understanding Chemistry: Mass Spectrometry

    NSDL National Science Digital Library

    Clark, Jim

    This website, which is part of a larger project "ChemGuide" provides a nice introduction to mass spectrometry that is suitable for use by introductory analytical chemistry students. Content includes an introduction to the instrumentation, explanation of fragmentation and how it can be used to identify compound structure, the origin of the M+ and (M+1)+ peaks. Each section is succinct, well written and provides a simple example. As such the site should be useful to faculty introducing mass spectrometry in the analytical classroom and to chemistry students.

  17. Chemistry in Second Life

    PubMed Central

    Lang, Andrew SID; Bradley, Jean-Claude

    2009-01-01

    This review will focus on the current level on chemistry research, education, and visualization possible within the multi-user virtual environment of Second Life. We discuss how Second Life has been used as a platform for the interactive and collaborative visualization of data from molecules and proteins to spectra and experimental data. We then review how these visualizations can be scripted for immersive educational activities and real-life collaborative research. We also discuss the benefits of the social networking affordances of Second Life for both chemists and chemistry students. PMID:19852781

  18. Carbon Source Utilization Profiles for Microbial Communities from Hydrologically Distinct Zones in a Basalt Aquifer

    Microsoft Academic Search

    F. S. Colwell; R. M. Lehman

    1997-01-01

    The Eastern Snake River Plain aquifer has hydrologically distinct zones in basalt flow units and interbedded sediments. The\\u000a zones that differ markedly in physical features (e.g., porosity and permeability) have similar groundwater chemistries. The\\u000a primary objective of this study was to determine whether intervals within the aquifer that contrast on the basis of permeability\\u000a have distinct communities of unattached microorganisms

  19. Chemistry Tutor List: Fall 2012 Chemistry 102 (Fundamental)

    E-print Network

    Almor, Amit

    9/11/2012 Chemistry Tutor List: Fall 2012 Chemistry 102 (Fundamental) Nick Mank mank@email.sc.edu//734-308-2715/GSRC 534/803-777-2680 Hong Guan quan4@email.sc.edu / GSRC 536/803-777-7826 Chemistry 111-429-0104 Mitra Ganewatta ganewatt@email.sc.edu/GSRC 428/803-777-7443/803-463-8605 Chemistry 321 (Quantitative

  20. Chemistry Tutor List: Summer I & II 2012 Chemistry 102 (Fundamental)

    E-print Network

    Almor, Amit

    05/22/2012 Chemistry Tutor List: Summer I & II 2012 Chemistry 102 (Fundamental) Nick Mank mank@email.sc.edu /734-308-2715 Chemistry 111-112 (General) Maggie Klauck klauckm@email.sc.edu /GSRC 437/803-777-9377 Max-608-1211 Nick Mank mank@email.sc.edu /734-308-2715 Chemistry 321 (Quantitative Analysis) Max Molleo molleo

  1. UNIVERSITY OF OREGON Physical Chemistry Faculty Position. The Department of Chemistry & Biochemistry (http://chemistry.uoregon.edu) invites

    E-print Network

    Oregon, University of

    UNIVERSITY OF OREGON Physical Chemistry Faculty Position. The Department of Chemistry physical chemistry (broadly defined) beginning Fall 2014 at the anticipated rank of assistant professor independent research program in physical chemistry and active participation and excellence in teaching

  2. UNIVERSITY OF OREGON Physical Chemistry Faculty Position The Department of Chemistry and Biochemistry (http://chemistry.uoregon.edu)

    E-print Network

    Cina, Jeff

    UNIVERSITY OF OREGON Physical Chemistry Faculty Position The Department of Chemistry physical chemistry (broadly defined) beginning Fall 2015 at the anticipated rank of assistant professor independent research program in physical chemistry and active participation and excellence in teaching

  3. Nurturing Deep Connections.

    ERIC Educational Resources Information Center

    Kessler, Rachael

    2002-01-01

    Argues that the missing ingredient in school reform is soul, that is, deep connections among students, teachers, and administrators. Discusses five principles of leadership with soul: Personalize, pacing, permission, protection, and paradox. (PKP)

  4. Connections QUARTERLY NEWSLETTER

    E-print Network

    Qian, Ning

    Department of Obstetrics and Gynecology Co-Editors-in-Chief Connections Message from the Editors EDitors-in-CHiEf Michael Weiner, MD Department of Pediatrics Cande Ananth, PhD, MPH Department of Obstetrics and Gynecology and Gynecology

  5. The CORALS Connection

    NSDL National Science Digital Library

    Brian Plankis

    2010-02-01

    The Ocean, Reefs, Aquariums, Literacy, and Stewardship (CORALS) research program helps students connect global environmental issues to local concerns and personal choices. During the 18-week program, students strengthen their understanding of coral reef d

  6. Can we measure connectivity?

    NASA Astrophysics Data System (ADS)

    Brazier, Richard; Vericat, Damia; Cerda, Artemi; Brardinoni, Francesco; Batalla, Ramon; Masselink, Rens; Wittenberg, Lea; Nadal Romero, Estela; López-Tarazón, José; Estrany, Joan; Keesstra, Saskia

    2015-04-01

    Whilst the term 'connectivity' in hydrological and sediment-based research is becoming increasing well-known, it is neither used consistently in the existing literature, nor is it clear from that literature, that the connectivity of a landscape, or part of a landscape can be measured. However, it is argued that understanding how well critical source areas of water or sediment are connected to receiving surface waters, may be an essential step towards improvement of land management to mitigate flooding, soil erosion and water quality problems. The first part of this paper, therefore, explores what is currently meant by the term connectivity; addressing the differences between structural and functional, or process-based connectivity, specifically with reference to the movement of water and sediment through an ecosystem. We argue that most existing studies do not measure connectivity. Instead, they address only part of the story. Existing work may describe structural change in a landscape, which can perhaps elucidate the potential for connectivity to occur, or indeed the emergent spatial properties of an ecosystem, but it rarely quantifies the connectivity of an ecosystem in a process-based manner through time. Alternatively, a great deal of work describes fluxes of water and sediment at (sometimes multiple) points in a landscape and infers connectivity of the system via analysis of time series data; from rainfall peak to hydrograph peak or start of sediment flux until peak sediment flux within an event. Such data are doubtless useful to understand catchment function, but alone, they do not provide evidence that quantifies (for example) how well connected sediment sources are to the outlets of the catchments from which they flux. Finally, there are many examples of water and particularly sediment tracing studies, which attempt to link, either directly or indirectly water or sediment sources with their sinks (which might more usefully be termed temporary stores). Whilst direct tracing techniques have great potential to describe how quickly material travels over measurable distances, and therefore how connected the system may be, such approaches are rarely used to answer this type of question. In addition, indirect tracing techniques, often termed fingerprinting approaches (in the case of sediments), tend to focus on the source apportionment of material that has left a catchment, or field based on 'unique' signatures. Such experiments do not actually elucidate whether the material that is eroded from a source (hillslope, gully or channel bank) has left the catchment, thus not proving whether connectivity has indeed occurred at all. We conclude that there is great potential to measure, or perhaps more appropriately, quantify connectivity of water and sediment across a wide range of scales and ecosystems. However, we also argue that currently, very few, if any studies actually do this well. We argue that in part, this is because researchers have yet to formulate explicit questions about connectivity at the heart of their research, preferring to experiment within traditional scales of interest; hillslopes, channels and catchments, using measurement techniques that in isolation, do not bridge gaps across scales in a coherent manner. In the second part of this paper we propose, through the design of three hypothetical (and probably rather costly) experiments, how research might be undertaken to address this problem; resulting in a combination of techniques being applied in parallel to quantify connectivity across scales. It is suggested that workers interested in this area join forces with us, under the banner of WG2 in the EU COST Connecteur project, to realise these experiments and move the discipline closer to a point where we can consistently quantify connectivity of any ecosystem within which we work.

  7. Connectibles : tangible social networking

    E-print Network

    Kalanithi, Jeevan James

    2007-01-01

    This thesis presents "Connectibles," an instantiation of a tangible social network, a new type of social network application rooted in physical objects and real world social behavior. This research is inspired by social ...

  8. Free-electron induced chemistry Theoretical Chemistry Section, BARC, Mumbai

    E-print Network

    Shyamasundar, R.K.

    Free-electron induced chemistry Theoretical Chemistry Section, BARC, Mumbai Chemical reactions, I shall present the quantum chemical methodologies for computing the potential energy surfaces will be presented. Wednesday, August 4:00 PM (Tea/Coffee at Seminar Hall, TCIS Seminar electron induced chemistry

  9. Physical Chemistry and Theoretical Chemistry CHM1441H Mathematical Methods

    E-print Network

    Chan, Hue Sun

    Physical Chemistry CHM1443H Intermediate Quantum Mechanics Elements of group theory and its applications to an advanced graduate student in chemistry or physics who has taken graduate level quantum mechanics. Topics, Quantum Computation and Quantum Information. CHM1447H Biophysical Chemistry The course will review protein

  10. Control line sealing connection

    Microsoft Academic Search

    Tohill

    1984-01-01

    A sealing connection for the passage of a fluid control line through adjoining members is claimed. The connection comprises a metallic tubular sealing element provided with tapered end portions, each end having internal frusto-conical surfaces and external frusto-conical surfaces in coaxial alignment with the bore through the element. The external frusto-conical surfaceas provide metal-to-metal sealing with aligned frusto-conical seating surfaces

  11. Quick connect fastener

    NASA Technical Reports Server (NTRS)

    Weddendorf, Bruce (inventor)

    1994-01-01

    A quick connect fastener and method of use is presented wherein the quick connect fastener is suitable for replacing available bolts and screws, the quick connect fastener being capable of installation by simply pushing a threaded portion of the connector into a member receptacle hole, the inventive apparatus being comprised of an externally threaded fastener having a threaded portion slidably mounted upon a stud or bolt shaft, wherein the externally threaded fastener portion is expandable by a preloaded spring member. The fastener, upon contact with the member receptacle hole, has the capacity of presenting cylindrical threads of a reduced diameter for insertion purposes and once inserted into the receiving threads of the receptacle member hole, are expandable for engagement of the receptacle hole threads forming a quick connect of the fastener and the member to be fastened, the quick connect fastener can be further secured by rotation after insertion, even to the point of locking engagement, the quick connect fastener being disengagable only by reverse rotation of the mated thread engagement.

  12. Chemistry 2A Laboratory Manual

    E-print Network

    Guo, Ting

    Chemistry 2A Laboratory Manual Standard Operating Procedures Department of Chemistry University # ____________ Laboratory Information Teaching Assistant's Name _______________________ Laboratory Section Number _______________________ Laboratory Room Number _______________________ Dispensary Room Number 1060 Sciences Lab Building Location

  13. Chemistry 2C Laboratory Manual

    E-print Network

    Guo, Ting

    Chemistry 2C Laboratory Manual Standard Operating Procedures Department of Chemistry University # ____________ Laboratory Information Teaching Assistant's Name _______________________ Laboratory Section Number _______________________ Laboratory Room Number _______________________ Dispensary Room Number 1060 Sciences Lab Building Location

  14. Chemistry 2B Laboratory Manual

    E-print Network

    Guo, Ting

    Chemistry 2B Laboratory Manual Standard Operating Procedures Department of Chemistry University # ____________ Laboratory Information Teaching Assistant's Name _______________________ Laboratory Section Number _______________________ Laboratory Room Number _______________________ Dispensary Room Number 1060 Sciences Lab Building Location

  15. Chemistry 2B Laboratory Manual

    E-print Network

    Guo, Ting

    Chemistry 2B Laboratory Manual Department of Chemistry University of California - Davis Davis, CA 95616 Winter 2014 #12;Student Name _____________________ Locker # ____________ Laboratory Information Teaching Assistant's Name _______________________ Laboratory Section Number

  16. Organic Chemistry, 5th Edition

    NSDL National Science Digital Library

    Finds ChemEd DL resources related to the sections of the Organic Chemistry textbook, Organic Chemistry, 5th Edition, by William H. Brown, Christopher S. Foote, Brent L. Iverson, Eric Anslyn published by Brooks/Cole, 2009.

  17. The Birthday of Organic Chemistry.

    ERIC Educational Resources Information Center

    Benfey, Otto Theodor; Kaufman, George B.

    1979-01-01

    Describes how the synthesis of urea, 150 years ago, was a major factor in breaking the artificial barrier that existed between organic and inorganic chemistry, and this contributed to the rapid growth of organic chemistry. (GA)

  18. E RADTH CHEMISTRY OF PROTACTINIUM

    E-print Network

    for the element as found in the literature. The series of monographs wil546.9 " - E RADTH CHEMISTRY OF PROTACTINIUM -- . .-. -- --.. -- -- BY H. W. KIRBY rr government, industrial, and university laboratories in the areas of nuclear chemistry and analytical

  19. The Lighter Side of Chemistry.

    ERIC Educational Resources Information Center

    Lamb, William G.

    1984-01-01

    Discusses the rationale for using photochemistry to merge descriptive chemistry and molecular orbital theory in first-year chemistry courses. Includes procedures and safety information for various activities, demonstrations, and experiments involving photochemical reactions. (DH)

  20. Greener and Sustainable Chemistry

    EPA Science Inventory

    The special issue on Greener and Sustainable Chemistry highlights various strategies that can be adopted to address the pollution preventive measures promoting the use of energy efficient reactions that utilize benign and bio-renewable raw materials in a relatively safer reaction...

  1. Virginia Tech Chemistry Department

    E-print Network

    Crawford, T. Daniel

    Virginia Tech Chemistry Department GRADUATE POLICIES AND PROCEDURES "The Orange Book" Blacksburg, Virginia August 2012 #12;2 Non-Discrimination Statement Virginia Tech does not discriminate against (http://www.hr.vt.edu/). Diversity Statement ­ The Virginia Tech Principles of Community We affirm

  2. Chemistry of Meridiani Outcrops

    NASA Technical Reports Server (NTRS)

    Clark, B. C.; Squyres, S. W.; Ming, D. W.; Morris, R. V.; Yen, A.; Gellert, R.; Knoll, A.H.; Arvidson, R. E.

    2006-01-01

    The chemistry and mineralogy of the sulfate-rich sandstone outcrops at Meridiani Planum, Mars, have been inferred from data obtained by the Opportunity rover of the MER mission and reported in recent publications [1-6]. Here, we provide an update on more recent samples and results derived from this extensive data set.

  3. Better imaging through chemistry.

    PubMed

    Stelzer, Ernst H K

    2014-12-01

    The 2014 Nobel Prize in Chemistry has been awarded jointly to William E. Moerner, Stefan W. Hell, and Eric Betzig "for the development of super-resolved fluorescence microscopy." I discuss the contributions made by this year's awardees and how advances in understanding the behavior of fluorophores and research in light microscopy converged to allow the improved visualization of biological structures. PMID:25480287

  4. Nuclear analytical chemistry

    Microsoft Academic Search

    D. Brune; B. Forkman; B. Persson

    1984-01-01

    This book covers the general theories and techniques of nuclear chemical analysis, directed at applications in analytical chemistry, nuclear medicine, radiophysics, agriculture, environmental sciences, geological exploration, industrial process control, etc. The main principles of nuclear physics and nuclear detection on which the analysis is based are briefly outlined. An attempt is made to emphasise the fundamentals of activation analysis, detection

  5. Online Organic Chemistry

    ERIC Educational Resources Information Center

    Janowicz, Philip A.

    2010-01-01

    This is a comprehensive study of the many facets of an entirely online organic chemistry course. Online homework with structure-drawing capabilities was found to be more effective than written homework. Online lecture was found to be just as effective as in-person lecture, and students prefer an online lecture format with shorter Webcasts. Online…

  6. The Language of Chemistry.

    ERIC Educational Resources Information Center

    Bretz, Stacey Lowery; Meinwald, Jerrold

    2002-01-01

    Describes a new curriculum called The Language of Chemistry designed to illustrate how problems of biological and/or medical importance can be understood on a molecular basis and to show that the logic, knowledge, and language needed are easily accessible. Among the case studies in the curriculum are the giant peacock moth, bacterial chemotaxis,…

  7. Bringing chemistry to life

    PubMed Central

    Boyce, Michael; Bertozzi, Carolyn R

    2011-01-01

    Bioorthogonal chemistry allows a wide variety of biomolecules to be specifically labeled and probed in living cells and whole organisms. Here we discuss the history of bioorthogonal reactions and some of the most interesting and important advances in the field. PMID:21799498

  8. Tie-Dye Chemistry

    NSDL National Science Digital Library

    Gretchen Cessna

    2001-03-01

    In their travels to the indigo dye pits of northern Nigeria, the authors were struck by the beauty, history, and chemistry of indigo dyeing. They returned from Nigeria eager to develop a laboratory exercise that would expose students to the science of ind

  9. MOM Teaches Chemistry

    ERIC Educational Resources Information Center

    Smierciak, Rich

    2004-01-01

    A wonderful way to engage science students is to make them think a demonstration is not turning out the way the instructor intended. Basically, throw a little humor into teaching, and they will be hooked. Described in this article is a demonstration that uses Milk of Magnesia (MOM) as a visual and humorous method to review equilibrium chemistry

  10. Advanced Chemistry Development (ACD)

    NSDL National Science Digital Library

    ACD provides a large set of chemistry software. ChemSketch and Chem 3-D include freely downloadable versions. ChemSketch can be used for drawing and publishing chemical structures; Chem 3-D can be used for three dimensional visualization, and includes a molecular mechanics geometry optimizer.

  11. Water Chemistry Laboratory Manual.

    ERIC Educational Resources Information Center

    Jenkins, David; And Others

    This manual of laboratory experiments in water chemistry serves a dual function of illustrating fundamental chemical principles of dilute aqueous systems and of providing the student with some familiarity with the chemical measurements commonly used in water and wastewater analysis. Experiments are grouped in categories on the basis of similar…

  12. The Chemistry of Health

    ERIC Educational Resources Information Center

    Davis, Alison

    2009-01-01

    Do people realize that chemistry plays a key role in helping solve some of the most serious problems facing the world today? Chemists want to find the building blocks of the chemical universe--the molecules that form materials, living cells and whole organisms. Many chemists are medical explorers looking for new ways to maintain and improve…

  13. Chemistry & Biology Brief Communication

    E-print Network

    van Aalten, Daan

    Chemistry & Biology Brief Communication Synergy of Peptide and Sugar in O-GlcNAcase Substrate with the sugar, O-GlcNAcase recog- nizes the peptide backbone through hydrophobic interactions and intramolecular with hOGA, and have revealed the molecular details of the interaction with the GlcNAc sugar (Dennis et al

  14. The Lens of Chemistry

    ERIC Educational Resources Information Center

    Thalos, Mariam

    2013-01-01

    Chemistry possesses a distinctive theoretical lens--a distinctive set of theoretical concerns regarding the dynamics and transformations of a perplexing variety of organic and nonorganic substances--to which it must be faithful. Even if it is true that chemical facts bear a special (reductive) relationship to physical facts, nonetheless it will…

  15. Evaluating Environmental Chemistry Textbooks.

    ERIC Educational Resources Information Center

    Hites, Ronald A.

    2001-01-01

    A director of the Indiana University Center for Environmental Science Research reviews textbooks on environmental chemistry. Highlights clear writing, intellectual depth, presence of problem sets covering both the qualitative and quantitative aspects of the material, and full coverage of the topics of concern. Discusses the director's own approach…

  16. Chemistry between the stars

    NASA Technical Reports Server (NTRS)

    Gammon, R. H.

    1976-01-01

    A unit is presented for the secondary school teacher of physics, chemistry, astronomy, or earth sciences. Included are a list of reference materials, teaching aids, and projects. Discussion questions and a glossary are also provided. Concepts developed are: the nature of interstellar space, spectroscopy, molecular signals from space and interstellar molecules and other areas of astronomy.

  17. Chemistry Between The Stars.

    ERIC Educational Resources Information Center

    Gammon, Richard H.

    This booklet is part of an American Astronomical Society curriculum project designed to provide teaching materials to teachers of secondary school chemistry, physics, and earth science. The following topics are covered: the physical conditions in interstellar space in comparison with those of the earth, particularly in regard to gas density,…

  18. Shock wave chemistry

    Microsoft Academic Search

    A. N. Dremin

    1989-01-01

    Shock wave chemistry, a new scientific trend, deals with investigations of chemical aspects of the substance state under this new type of effect. Indeed, shock wave effect is not a greater imposition than pressure and temperature actions. Characteristic features of the effect are the tremendous rates of substance loading and subsequent unloading. The effects result in a substance in a

  19. Epoxying Isoprene Chemistry

    EPA Science Inventory

    It seems that every few months we read about another missing aspect of atmospheric chemistry: missing products, missing reactivity, missing sources, missing understanding. Thus, it is with some relief that we read in this issue the paper of Paulot et al. The paper provides more...

  20. Get Cooking with Chemistry!

    ERIC Educational Resources Information Center

    American Chemical Society, Washington, DC.

    This book presents science activities investigating the chemical changes and reactions with powders that are used in baking. Activities include: (1) Mystery Powders; (2) Find the Fizz: Discover the Secret of Baking Powder; and (3) A Feast for Yeast and Cheese: Behold the Power of Chemistry. (YDS)

  1. Array processors in chemistry

    SciTech Connect

    Ostlund, N.S.

    1980-01-01

    The field of attached scientific processors (''array processors'') is surveyed, and an attempt is made to indicate their present and possible future use in computational chemistry. The current commercial products from Floating Point Systems, Inc., Datawest Corporation, and CSP, Inc. are discussed.

  2. Chemistry in the Troposphere.

    ERIC Educational Resources Information Center

    Chameides, William L.; Davis, Douglas D.

    1982-01-01

    Topics addressed in this review of chemistry in the troposphere (layer of atmosphere extending from earth's surface to altitude of 10-16km) include: solar radiation/winds; earth/atmosphere interface; kinetic studies of atmospheric reactions; tropospheric free-radical photochemistry; instruments for nitric oxide detection; sampling…

  3. Chemometrics in Electroanalytical Chemistry

    Microsoft Academic Search

    M. Esteban; C. Ariño; J. M. Díaz-Cruz

    2006-01-01

    The use of chemometrics in electroanalytical chemistry is not as popular as in spectroscopy, although recently, application of these methods for mathematical resolution of overlapping signals, calibration and model identification have been increasing. Self-modelling curve resolution and multivariate analysis have been shown to be very powerful for in the analysis of electroanalytical data, especially for multianalyte calibration and modelling in

  4. Concept Development Studies in Chemistry

    NSDL National Science Digital Library

    Concept Development Studies in Chemistry is an on-line textbook for a general chemistry course. Each module develops a central concept in chemistry from experimental observations and inductive reasoning. This approach complements an interactive or active learning teaching approach. The 17 chapters are associated with the general chemistry course taught by the author at Rice University. The author holds a creative commons copyright. Users should see the text home page for details.

  5. Department of Chemistry Table of Contents

    E-print Network

    Kurnikova, Maria

    Polymer & Materials Chemistry . . . . . . . . . . . . . . . . . . . . . . . . 3 Bioorganic Chemistry W ith strengths in polymer science, green and environmental chemistry, bioorganic, bioinorganic polymers; characterization and device development using proximal probe techniques. Bioorganic Chemistry

  6. MAC 560 --Tropospheric Chemistry I Spring, 2009

    E-print Network

    Miami, University of

    chemistry · to learn the atmospheric chemistry behind well-known phenomena such as smog, acid rain.3. Sulfur chemistry and acid rain 5.4. Nitrogen chemistry 5.5. Organic acids 5.6. Ecological and structural

  7. Twin Convergence Zones

    NASA Technical Reports Server (NTRS)

    2002-01-01

    NASA's QuikSCAT satellite has confirmed a 30-year old largely unproven theory that there are two areas near the equator where the winds converge year after year and drive ocean circulation south of the equator. By analyzing winds, QuikSCAT has found a year-round southern and northern Intertropical Convergence Zone. This find is important to climate modelers and weather forecasters because it provides more detail on how the oceans and atmosphere interact near the equator. The Intertropical Convergence Zone (ITCZ) is the region that circles the Earth near the equator, where the trade winds of both the Northern and Southern Hemispheres come together. North of the equator, strong sun and warm water of the equator heats the air in the ITCZ, drawing air in from north and south and causing the air to rise. As the air rises it cools, releasing the accumulated moisture in an almost perpetual series of thunderstorms. Satellite data, however, has confirmed that there is an ITCZ north of the equator and a parallel ITCZ south of the equator. Variation in the location of the ITCZ is important to people around the world because it affects the north-south atmospheric circulation, which redistributes energy. It drastically affects rainfall in many equatorial nations, resulting in the wet and dry seasons of the tropics rather than the cold and warm seasons of higher latitudes. Longer term changes in the ITCZ can result in severe droughts or flooding in nearby areas. 'The double ITCZ is usually only identified in the Pacific and Atlantic Oceans on a limited and seasonal basis,' said Timothy Liu, of NASA's Jet Propulsion Laboratory and California Institute of Technology, Pasadena, Calif., and lead researcher on the project. In the eastern Pacific Ocean, the southern ITCZ is usually seen springtime. In the western Atlantic Ocean, the southern ITCZ was recently clearly identified only in the summertime. However, QuikSCAT's wind data has seen the southern ITCZ in all seasons across the entire Atlantic Ocean and the eastern Pacific. 'QuikSCAT's wind data confirms there is a double ITCZ, and that they exist all year long,' Liu said. This is a major find for the science community, as the existence, location, and seasonality of the double ITCZ had remained controversial since 1969. full text: Satellite Sees Double Zones of Converging Tropical Winds around The World For more about convergence zones, read: The Intertropical Convergence Zone and Convergence Zones: Where the Action Is Image courtesy Liu and Xie, NASA JPL

  8. Curriculum Vitae Department of Chemistry

    E-print Network

    Braun, Paul

    ,Society of Biological Inorganic Chemistry 2007 Chang Jiang Professorship, Nanjing University 2007 ResearchCurriculum Vitae Yi Lu Department of Chemistry University of Illinois at Urbana-Champaign Urbana ___________________________________________________________________________________________________________________________________________________________ Yi Lu Department of Chemistry University of Illinois at Urbana-Champaign Urbana, Illinois 61801

  9. Curriculum Vitae Department of Chemistry

    E-print Network

    Braun, Paul

    for the Advancement of Science 2007 Early Career Award, Society of Biological Inorganic Chemistry 2007 Chang JiangCurriculum Vitae Yi Lu Department of Chemistry University of Illinois at Urbana-Champaign Urbana ___________________________________________________________________________________________________________________________________________________________ Yi Lu Department of Chemistry University of Illinois at Urbana-Champaign Urbana, Illinois 61801

  10. Curriculum Vitae Department of Chemistry

    E-print Network

    Braun, Paul

    of Biological Inorganic Chemistry 2007 Chang Jiang Professorship, Nanjing University 2007 Research, DevelopmentCurriculum Vitae Yi Lu Department of Chemistry University of Illinois at Urbana-Champaign Urbana ___________________________________________________________________________________________________________________________________________________________ Yi Lu Department of Chemistry University of Illinois at Urbana-Champaign Urbana, Illinois 61801

  11. Curriculum Vitae Department of Chemistry

    E-print Network

    Braun, Paul

    of Biological Inorganic Chemistry 2007 Chang Jiang Professorship, Nanjing University 2007 Research, DevelopmentCurriculum Vitae Yi Lu Department of Chemistry University of Illinois at Urbana-Champaign Urbana ___________________________________________________________________________________________________________________________________________________________ Yi Lu Depfartment of Chemistry University of Illinois at Urbana-Champaign Urbana, Illinois 61801

  12. Brooklyn College Department of Chemistry

    E-print Network

    Kobrak, Mark N.

    Brooklyn College Department of Chemistry General Chemistry I Syllabus GENERAL CHEMISTRY I ­ SPRING on exams. FINAL EXAM: MAY 20, 2010 (Th), 8:00 AM ­ 10:00 AM, rooms TBA 1 #12;Brooklyn College Department. Cheating, plagiarism, internet plagiarism and obtaining unfair advantages are violations of policies

  13. Chemistry Symposium April 27, 2013

    E-print Network

    Shyamasundar, R.K.

    Chemistry Symposium April 27, 2013 Tata Institute of Fundamental Research, Centre Khushalani Materials chemistry of oxides: formation and function 11.20-11.40 R. Chandrasekar Light cocrystal: From chemistry to pre-clinical 12.00 -12.20 A. Sri Rama Koti Mechanical stability of proteins

  14. Chemistry I Primary Writing or

    E-print Network

    Cantlon, Jessica F.

    MTH 161 Calculus I CHM 131 Chemistry I Primary Writing or Humanities/Social Science MTH 162 Calculus II CHM 132 Chemistry II PHY 121 Physics I Mechanics MTH 163/165 Differential Equations BIO 110/141 & 122/142. Any biology, microbiology, neuroscience, chemistry, or physics course with number greater

  15. Chemistry I Primary Writing or

    E-print Network

    Goldman, Steven A.

    MTH 161 Calculus I CHM 131 Chemistry I Primary Writing or Humanities/Social Science MTH 162 Calculus II CHM 132 Chemistry II PHY 121 Physics I Mechanics MTH 163/165 Differential Equations BIO 110, chemistry, or physics course with number greater than 109 may be used to fulfill this requirement (excluding

  16. Chemistry World Twist and shine

    E-print Network

    Rogers, John A.

    Chemistry World Twist and shine 17 October 2010 An international team of researchers has developed on this story at the Chemistry World blog Read other posts and join in the discussion Related Links External displays are finally racing to be first to bring their products to mass market © Royal Society of Chemistry

  17. Chemistry I Primary Writing or

    E-print Network

    Cantlon, Jessica F.

    MTH 161 Calculus I CHM 131 Chemistry I Primary Writing or Humanities/Social Science MTH 162 Calculus II CHM 132 Chemistry II PHY 121 Physics I Mechanics MTH 165 Differential Equations BIO 110/142. Any biology, microbiology, neuroscience, chemistry, or physics course with number greater than 109 may

  18. CHEMISTRY RELATED [Fe]-HYDROGENASES

    E-print Network

    Paris-Sud XI, Université de

    CHEMISTRY RELATED TO THE [Fe]-HYDROGENASES A thesis submitted to the University of East Anglia for the degree of Doctor of Philosophy Submitted July 2005 Cédric Tard Department of Biological Chemistry John of the biology and chemistry of iron-sulfur proteins and chemical models of their prosthetic groups

  19. B.S. in Chemistry

    E-print Network

    Houston, Paul L.

    B.S. in Chemistry::Traditional Track Typical Program of Study: First Semester Second Semester 1st Organic Chemistry I Calculus III Introduction to Physics I CHEM 2312 (3) CHEM 2380 (2) PHYS 2212 (4) Core Elective2 (3) Core Elective2 (3) Organic Chemistry II Synthesis Lab I Introduction to Physics II 3rd Year

  20. Chemistry I Primary Writing or

    E-print Network

    Cantlon, Jessica F.

    MTH 161 Calculus I CHM 131 Chemistry I Primary Writing or Humanities/Social Science MTH 162 Calculus II CHM 132 Chemistry II PHY 121 Physics I Mechanics MTH 165 Differential Equations BIO 110 biology, microbiology, neuroscience, chemistry, or physics course with number greater than 109 may be used

  1. August 28th 102 Chemistry

    E-print Network

    Maranas, Costas

    August 28th Thursday 102 Chemistry 11:30 am ­ 12:30 pm Darren J. Lipomi Department of Nano and intrinsically stretchable electronics" http://group.darrenlipomi.com September 4th Thursday 102 Chemistry 11 Thursday 102 Chemistry 11:30 am ­ 12:30 pm Bin Yang Bioproducts, Sciences & Engineering Laboratory

  2. Teaching Assistants Department of Chemistry

    E-print Network

    He, Chuan

    student. Dr. Vera Dragisich Dr. Valerie Keller Dr. Meishan Zhao Department Executive Officer Organic ChemGuide for Teaching Assistants Department of Chemistry The University of Chicago #12;© 2012 Department of Chemistry, The University of Chicago (2nd edition) #12;i Preface Welcome to the Chemistry

  3. Promoting Scientific Literacy Using a Sociocritical and Problem-Oriented Approach to Chemistry Teaching: Concept, Examples, Experiences

    ERIC Educational Resources Information Center

    Marks, Ralf; Eilks, Ingo

    2009-01-01

    This paper revisits the discussion about the objectives of scientific literacy-oriented chemistry teaching, its connection to the German concept of "Allgemeinbildung", and the debate of "science through education" vs. "education through science". About 10 years ago the sociocritical and problem-oriented approach to chemistry teaching was suggested…

  4. Groundwater chemistry at Yucca Mountain, Nevada, and vicinity

    SciTech Connect

    Kerrisk, J.F.

    1987-02-01

    The chemistry of groundwater at Yucca Mountain and vicinity has been reviewed and compared with the chemistry of water from the Nevada Test Site and surrounding areas such as the Amargosa Desert and Oasis Valley. Sodium is the primary cation and carbonate is the primary anion in water from the saturated zone of the tuffaceous aquifer at Yucca Mountain. Other major cations present are calcium, potassium, and magnesium; other major anions are sulfate and chloride, with lesser quantities of fluoride and nitrate. Aqueous silica is also present. The primary purpose of this review was to survey water-composition data and look for relations among the compositional variables that could provide insight into the processes that control the composition and would ultimately affect radionuclide transport. The following conclusions were inferred from the review. Major cation concentrations are controlled by rock dissolution and mineral precipitation reactions as well as by cation exchange with existing minerals. Aqueous carbonate initially comes from atmospheric and soil-zone carbon dioxide, but there is evidence at Yucca Mountain that carbon dioxide in the gas phase of the unsaturated zone supplies additional carbonate to saturated-zone water in the tuffaceous aquifer as mineral dissolution and precipitation reactions raise the pH of the water. This combination is effectively mineral dissolution and precipitation in a system that is open with respect to carbon dioxide. A carbon model for this process is discussed.

  5. Vadose zone water fluxmeter

    DOEpatents

    Faybishenko, Boris A.

    2005-10-25

    A Vadose Zone Water Fluxmeter (WFM) or Direct Measurement WFM provides direct measurement of unsaturated water flow in the vadose zone. The fluxmeter is a cylindrical device that fits in a borehole or can be installed near the surface, or in pits, or in pile structures. The fluxmeter is primarily a combination of tensiometers and a porous element or plate in a water cell that is used for water injection or extraction under field conditions. The same water pressure measured outside and inside of the soil sheltered by the lower cylinder of the fluxmeter indicates that the water flux through the lower cylinder is similar to the water flux in the surrounding soil. The fluxmeter provides direct measurement of the water flow rate in the unsaturated soils and then determines the water flux, i.e. the water flow rate per unit area.

  6. Fractal Generalized Zone Plates

    E-print Network

    Mendoza-Yero, Omel; Minguez-Vega, Gladys; Lancis, Jesus; Climent, Vicent; Monsoriu, Juan A

    2008-01-01

    The construction of fractal generalized zone plates (FraGZPs) from a set of periodic diffractive optical elements with circular symmetry is proposed. This allows us to increase the number of foci of a conventional fractal zone plate (FraZP), keeping the self-similarity property within the axial irradiance. The focusing properties of these fractal diffractive optical elements for points not only along but also in the close vicinity of the optical axis are investigated. In both cases analytical expressions for the irradiance are derived. Numerical simulations of the energetic efficiency of FraGZPs under plane wave illumination are carried out. In addition, some effects on the axial irradiance caused by the variation in area of their transparent rings are shown.

  7. Deformation Zone Distribution

    NSDL National Science Digital Library

    2014-09-14

    The distribution of vorticity centres along an axis of maximum winds follows a fairly predictable pattern based on the characteristics of the flow. By diagnosing these characteristics, the meteorologist is able to quickly deduce the location and relative intensities of the associated vorticity centres as well as the relative sizes of the associated circulations. This information is summarized within the shape and orientation of the associated deformation zones. The deformation zones in turn reveal important details regarding feature motion and thermal advection and thus their diagnosis should be a critical part of the forecast process. This module takes 30-40 minutes to complete. It is part of the series: "Dynamic Feature Identification: The Satellite Palette".

  8. Cohesive Zone Modelling

    NASA Astrophysics Data System (ADS)

    Kozák, Vladislav

    2008-09-01

    The paper studies the prediction of the crack growth of the brittle and ductile fracture of the structural materials. Crack extension is simulated by means of element extinction algorithms. The principal effort is concentrated on the application of the cohesive zone model with the exponential traction separation law and on the cohesive zone modelling. Determination of micro-mechanical parameters is based on the combination of static tests, microscopic observation and numerical calibration procedures. The attention is paid on the influence of initial value of J-integral and the slope of R curve which is modelled by 3D FEM. The aim of this paper can be seen in verification of the application of the cohesive model based on the separation law, experimental and calibration procedure inevitable for the determination of the cohesive parameters for the modelling.

  9. MindZone

    NSDL National Science Digital Library

    2004-01-01

    As incidences of mental health problems among teenagers increase, it is important to make the general public aware of what resources are available to help these individuals (and those who care about them) with such issues. The MindZone site is sponsored by the Annenberg Foundation Trust at Sunnylands with support from the Annenberg Public Policy of the University of Pennsylvania. The site itself is divided into three separate sections: Cope, Care, and Deal. Within each section, users can take quizzes about mental health and learn about how to explore the feelings associated with depressions, suicide, and a number of other conditions. In the MindZone Machine area, users can learn about different anxiety orders and get answers to frequently asked questions. Finally, the site is rounded out by an Ask the Expert area, where visitors can find thoughtful responses to such queries as: "Do people with schizophrenia have multiple personalities?".

  10. Cohesive Zone Models and Fracture

    Microsoft Academic Search

    C. Y. Hui; A. Ruina; R. Long; A. Jagota

    2011-01-01

    Basic concepts on cohesive models and their usage in fracture are reviewed.These included potential based cohesive zone models and the concept of an anisotropic failure surface. Some new results are presented for history-dependent cohesive zone models. In particular, a class of cohesive zone models where damage is represented by a state variable which evolves according to loading history is studied.

  11. Bimodal hybrid zones and speciation

    Microsoft Academic Search

    Chris D. Jiggins; James Mallet

    2000-01-01

    Contact zones exemplify a series of stages in speciation. In unimodal hybrid zones intermediates predominate; in bimodal zones hybrids are rare and parental forms predominate; and finally, species might overlap, but never hybridize. Recent studies show bimodality to be associated strongly with assortative mating or fertilization, and only weakly with overall levels of genetic divergence or intrinsic genomic incompatibility. Ecological

  12. Deformation Zone Diagnosis

    NSDL National Science Digital Library

    COMET

    2007-11-05

    Following an analysis of the main features of a deformation zone, the diagnosis of temporal and spatial changes in these features can be used to deduce underlying meteorological processes and their progression. In turn, this knowledge can then be used in the forecast process to adjust the forecast accordingly. This module takes 35-45 minutes to complete. It is part of the series: "Dynamic Feature Identification: The Satellite Palette".

  13. Melt Connectivity and Its Effect on Grain Growth in Natural Olivine Aggregates: An Experimental Study

    NASA Astrophysics Data System (ADS)

    Hashim, L.; Sifre, D.; Précigout, J.; Gardés, E.; Le Trong, E.; Gaillard, F.

    2014-12-01

    To better constrain the rheology of the mantle, experimental studies on olivine grain growth have been conducted (Faul and Scott, 2006; Karato, 1989; Nichols and Mackwell, 1991) since the grain size is an important parameter under dynamic regimes (e.g. diffusion creep and grain boundary sliding). In order to better define the melt effect on the rheological response of a partially molten olivine aggregate, we have experimentally investigated the effect of melt on olivine grain growth and the connectivity of this melt phase. Experiments were performed in 3/4" piston cylinders at 500 MPa confining pressure, different temperatures (i.e. 1100°C, 1250°C and 1400°C) and four durations (1h, 12h, 72h and 15 days). Starting material was composed of natural San Carlos olivine (5 ?mconnectivity was assessed through scanning electron microscope (SEM) images in backscattered electron mode. Electron backscatter diffraction (EBSD) maps of each sample were also collected in order to determine the olivine grain sizes as a function of time and melt content. References Faul, U. H., Scott, D., 2006. Grain growth in partially molten olivine aggregates. Contributions to Mineralogy and Petrology 151 (1), 101-111. Karato, S.-I., 1989. Grain growth kinetics in olivine aggregates. Tectonophysics 168 (4), 255-273. Nichols, S. J., Mackwell, S. J., 1991. Grain growth in porous olivine aggregates. Physics and Chemistry of Minerals 18 (4), 269-278. Sifré, D., Gardés, E., Massuyeau, M., Hashim, L., Hier-Majumder, S., Gaillard, F., 2014. Electrical conductivity during incipient melting in the oceanic low-velocity zone. Nature 509 (7498), 81-85.

  14. Towards "Bildung"-Oriented Chemistry Education

    ERIC Educational Resources Information Center

    Sjöström, Jesper

    2013-01-01

    This paper concerns "Bildung"-oriented chemistry education, based on a reflective and critical discourse of chemistry. It is contrasted with the dominant type of chemistry education, based on the mainstream discourse of chemistry. "Bildung"-oriented chemistry education includes not only content knowledge in chemistry, but also…

  15. College of Science Department of Chemistry

    E-print Network

    Crawford, T. Daniel

    ) ____ (3) ____ CHEM 2545-2546 Organic Chemistry Labs (1) ____ (1) ____ CHEM 4615 Physical Chemistry or CHEM 4554 Drug Chemistry or CHEM 4616 Physical Chemistry for Life Sciences (Additional prerequisiteCollege of Science Department of Chemistry CHEMISTRY MINOR CHECKSHEET For students graduating

  16. A Thematic Review of Studies into the Effectiveness of Context-Based Chemistry Curricula

    NASA Astrophysics Data System (ADS)

    Ültay, Neslihan; Çal?k, Muammer

    2012-12-01

    Context-based chemistry education aims at making connections between real life and the scientific content of chemistry courses. The purpose of this study was to evaluate context-based chemistry studies. In looking for the context-based chemistry studies, the authors entered the keywords `context-based', `contextual learning' and `chemistry education' in well-known databases (i.e. Academic Search Complete, Education Research Complete, ERIC, Springer LINK Contemporary). Further, in case the computer search by key words may have missed a rather substantial part of the important literature in the area, the authors also conducted a hand search of the related journals. To present a detailed thematic review of context-based chemistry studies, a matrix was used to summarize the findings by focusing on insights derived from the related studies. The matrix incorporates the following themes: needs, aims, methodologies, general knowledge claims, and implications for teaching and learning, implications for curriculum development and suggestions for future research. The general knowledge claims investigated in this paper were: (a) positive effects of the context-based chemistry studies; (b) caveats, both are examined in terms of students' attitudes and students' understanding/cognition. Implications were investigated for practice in context- based chemistry studies, for future research in context- based chemistry studies, and for curriculum developers in context- based chemistry studies. Teachers of context-based courses claimed that the application of the context-based learning approach in chemistry education improved students' motivation and interest in the subject. This seems to have generated an increase in the number of the students who wish to continue chemistry education at higher levels. However, despite the fact that the majority of the studies have reported advantages of context-based chemistry studies, some of them have also referred to pitfalls, i.e. dominant structure of out-of-school learning, tough nature of some chemistry topics, and teacher anxiety of lower-ability students.

  17. Monitoring and data analysis for the Vadose Zone Monitoring System (VZMS), McClellan AFB. Quarterly status report, August 15, 1997--November 15, 1997

    SciTech Connect

    Zawislanski, P.T.; Mountford, H.S.; Dahlquist, R.; Rodriguez, S.J.; Salve, R.

    1997-12-05

    This report contains information on field and laboratory work performed between August 15th and November 15th at site S-7 in IC 34, at McClellan AFB. At this location, a Vadose Zone Monitoring System (VZMS) (LBNL, 1996) is currently being used to collect subsurface data including hydraulic potential, soil gas pressure, moisture content, water chemistry, gas chemistry, and temperature.

  18. Interacting Convection Zones

    E-print Network

    L. J. Silvers; M. R. E. Proctor

    2007-08-28

    We present results from simulations to examine how the separation between two convectively unstable layers affect their interaction. We show that two convectively unstable layers remain connected via the overshooting plumes even when they are separated by several pressure scale heights.

  19. Cataclastic Zones within the Savcili Fault Zone, Central Turkey

    NASA Astrophysics Data System (ADS)

    Isik, V.; Seyitoglu, G.; Caglayan, A.; Uysal, T.; Zhao, J.; Sozeri, K.; Esat, K.

    2010-12-01

    One of the outstanding structural features in central Turkey is the Savcili fault zone (SFZ). Along the zone, numerous parallel to sub-parallel and curviplanar thrust/reverse faults usually emplace hanging-wall metamorphites and granitoids on to footwall sedimentary rocks. Deformation within the SFZ is accomplished by mesoscopic and/or microscopic folds, pervasive fractures (e.g. joints, shear fractures), slickensides, fault-rocks (e.g., breccia, cataclasite, gouge), offset along fault planes and veins. The SFZ includes zones of brittle deformation tens to hundreds of metres wide, termed here cataclastic zone (fault zone). In the field, these cataclastic zones are subdivided into two main architectural components based on brittle deformation intensity; core and damage zone. The cores of these zones range from 0.4-2 m wide, and include the principal fault surfaces of the SFZ; slickenlines and slip-surface markers (e.g., Riedel fractures, asymmetric cavities) on these principal surfaces indicate dip-slip displacements and top-to-the-north sense of movement. These cores are characterized by mostly gouges and cataclasites with clast of host rocks surrounding by very fine-, fine-grained matrix. The damage zones in the SFZ are mainly tabular in shape and tens to hundred metres. They surround the cores of the cataclastic zones and flanked by host rocks. Deformation features within the damage zones include fault rocks (e.g., breccia), pervasive fractures, veins, foldings plus district fault-parallel damage zones with variably widths. Our preliminary studies suggest that these sub-damage zones might probably be related to paleo-earthquake swarms during evolution of the SFZ. Integrated field and micro-tectonic studies indicate that the majority of mesoscopic and microscopic deformation within the cataclastic zones occurred by cataclasis and diffusive mass transfer processes in shallow crustal depth conditions.

  20. VANET Connectivity Analysis

    E-print Network

    Kafsi, M; Dousse, O; Alpcan, T; Hubaux, J -P

    2009-01-01

    Vehicular Ad Hoc Networks (VANETs) are a peculiar subclass of mobile ad hoc networks that raise a number of technical challenges, notably from the point of view of their mobility models. In this paper, we provide a thorough analysis of the connectivity of such networks by leveraging on well-known results of percolation theory. By means of simulations, we study the influence of a number of parameters, including vehicle density, proportion of equipped vehicles, and radio communication range. We also study the influence of traffic lights and roadside units. Our results provide insights on the behavior of connectivity. We believe this paper to be a valuable framework to assess the feasibility and performance of future applications relying on vehicular connectivity in urban scenarios.

  1. Inert electrode connection

    DOEpatents

    Weyand, J.D.; Woods, R.W.; DeYoung, D.H.; Ray, S.P.

    1985-02-19

    An inert electrode connection is disclosed wherein a layer of inert electrode material is bonded to a layer of conductive material by providing at least one intermediate layer of material therebetween comprising a predetermined ratio of inert material to conductive material. In a preferred embodiment, the connection is formed by placing in a die a layer of powdered inert material, at least one layer of a mixture of powdered inert material and conductive material, and a layer of powdered conductive material. The connection is then formed by pressing the material at 15,000--20,000 psi to form a powder compact and then densifying the powder compact in an inert or reducing atmosphere at a temperature of 1,200--1,500 C. 5 figs.

  2. Our Cosmic Connection

    NSDL National Science Digital Library

    Donna L. Young

    2005-02-01

    This article discusses how the evolution of stars from birth in giant clouds of gas and dust to death in catastrophic explosions sets the stage for planets and life to form. This article provides information about the Chandra X-Ray Center (CXC) educational website that contains a stellar evolution module that is available free to teachers (see the box Our Cosmic Connection clasroom activity on page 30 for website information). The stellar evolution activity uses multi-wavelength images of stellar nurseries, supernovae, neutron stars, pulsars, and black holes to investigate stellar life cycles and their connection to planet Earth.

  3. The World of Chemistry

    NSDL National Science Digital Library

    1990-01-01

    One doesn't have to be a Glenn Seaborg or a Lord Ernest Rutherford to learn about chemistry, though it probably couldn't help to have some of their curiosity about the world of chemistry. Young chemists and their teachers will definitely benefit from this nice resource offered by the Annenberg Media project. This original video series was produced by the University of Maryland and the Educational Film Center, and it consists of 26 half-hour programs. With industrial and research chemists demonstrating a number of high-intensity experiments and processes, the series is quite a find. The installments include such titles as "Modeling the Unseen", "The Atom", and "The Busy Electron".

  4. Organic Chemistry Animations

    NSDL National Science Digital Library

    Students who might be puzzled by the world of organic chemistry will definitely want to bookmark this useful site created by a team of researchers at the University of Liverpool. The site focuses on providing interactive 3D animations for a number of important organic reactions that will be encountered by students taking organic chemistry. The site's homepage contains a list of recent updates and additions, and visitors will want to also look at the list of reactions covered on the left-hand side of the same page. After clicking on each reaction, visitors can view the animation and also click on the animation to view additional resources. For those who are looking for specific reactions, the site also contains an embedded search engine feature.

  5. Organic Chemistry in Space

    NASA Technical Reports Server (NTRS)

    Charnley, Steven

    2009-01-01

    Astronomical observations, theoretical modeling, laboratory simulation and analysis of extraterrestrial material have enhanced our knowledge of the inventory of organic matter in the interstellar medium (ISM) and on small bodies such as comets and asteroids (Ehrenfreund & Charnley 2000). Comets, asteroids and their fragments, meteorites and interplanetary dust particles (IDPs), contributed significant amounts of extraterrestrial organic matter to the young Earth. This material degraded and reacted in a terrestrial prebiotic chemistry to form organic structures that may have served as building blocks for life on the early Earth. In this talk I will summarize our current understanding of the organic composition and chemistry of interstellar clouds. Molecules of astrobiological relevance include the building blocks of our genetic material: nucleic acids, composed of subunits such as N-heterocycles (purines and pyrimidines), sugars and amino acids. Signatures indicative of inheritance of pristine and modified interstellar material in comets and meteorites will also be discussed.

  6. Chemistry: A Molecular Approach

    NSDL National Science Digital Library

    Tro, Nivaldo Jose

    If you're away from the laboratory and you'd like to study a bit of chemistry, this fine site is a nice option. Created to complement a recent chemistry textbook authored by Nivaldo Tro of Westmont College, the site includes interactive media activities, self-quizzes, and a collection of external links. The materials are linked to the 24 chapters in the textbook, and they include "Gases", "Solutions", and "Electrochemistry". Each of these virtual chapters includes a listing of key concepts, along with slides, a set of useful tools (such as the periodic table), and a short video demonstrating different principles and concepts. Additionally, visitors can use the embedded search engine to look for specific items of interest and so on.

  7. Evolution of hydroformylation chemistry

    SciTech Connect

    Slaugh, L.H. [Shell Development Co., Houston, TX (United States)

    1995-12-01

    A new generation of hydroformylation catalysts was discovered in 1960 at Shell Development Company which dramatically altered the chemistry of producing industrially important alcohols from synthesis gas (CO/H{sub 2}) and olefins. These new homogeneous catalysts were obtained via the use of auxiliary tertiary phosphine ligands with the conventional OXO cobalt carbonyl catalyst. This is believed to have been the first historical example illustrating the utility of phosphine ligands to modify the catalytic properties of homogenous catalysts. In contradistinction to the conventional OXO reaction, highly linear alcohols were obtained in a single-step operation with ease of catalyst recycle. Based on this discovery, an industrial process was developed to produce large volume, environmentally friendly detergent alcohols. The chemistry of this process and a comparison with other hydroformylation catalyst systems will be made. Recent results obtained with phosphine-modified cobalt catalysts for the hydroformylation of substrates other than olefins will be presented.

  8. Pure and Applied Chemistry

    NSDL National Science Digital Library

    Established in 1960, the journal Pure and Applied Chemistry is committed to publishing notable research papers arising from various international scientific events and projects that are sponsored by the International Union of Pure and Applied Chemistry (IUPAC). First-time visitors can view the "News" area to learn about the most recent work published in the journal, and then they may wish to move on to the embedded search engine displayed prominently on the homepage. Other sections on the site include "Editorial Board", "Notes For Authors", and "Publication Policy". Visitors with a deep and abiding interest in the journal may also wish to consult their RSS feeds, which include those related to the publication of new articles and reports from the IUPAC. Finally, the site also contains a drop down menu titled "PAC Archives" where visitors can browse the contents of each volume.

  9. "Our graduate programs in chemistry are innovative and forward thinking." carleton.ca/chemistry

    E-print Network

    Dawson, Jeff W.

    Chemistry n Inorganic Chemistry n Organic Chemistry n Physical Chemistry n Nanoscience n Food Science n"Our graduate programs in chemistry are innovative and forward thinking." carleton.ca/chemistry GRADUATE PROGRAMS IN SHAPE YOUR FUTURE BASED ON YOUR RESEARCH INTERESTS Chemistry affects almost all

  10. Chemistry -Bachelor of Science (SCHUG) Total Credits Required: 128 Chemistry -ACS Certified

    E-print Network

    Chemistry 3 CH1160 University Chemistry II AND 3 CH4510 Intermediate Physical Chemistry 3 CH1161 University Composition 3 CH2421 Organic Chemistry Lab II 2 UN2002 Institutions 3 CH3510 Physical Chemistry I 3 Distribution Courses ** 15 CH3511 Physical Chemistry Lab I 2 CH3520 Physical Chemistry II 3 Free Electives - 21

  11. General chemistry students' understanding of the chemistry underlying climate science

    NASA Astrophysics Data System (ADS)

    Versprille, Ashley N.

    The purpose of this study is to investigate first-semester general chemistry students' understanding of the chemistry underlying climate change. The first part of this study involves the collection of qualitative data from twenty-four first-semester general chemistry students from a large Midwestern research institution. The semi-structured interview protocol was developed based on alternative conceptions identified in the research literature and the essential principles of climate change outlined in the U.S. Climate Change Science Program (CCSP) document which pertain to chemistry (CCSP, 2003). The analysis and findings from the interviews indicate conceptual difficulties for students, both with basic climate literacy and underlying chemistry concepts. Students seem to confuse the greenhouse effect, global warming, and the ozone layer, and in terms of chemistry concepts, they lack a particulate level understanding of greenhouse gases and their interaction with electromagnetic radiation, causing them to not fully conceptualize the greenhouse effect and climate change. Based on the findings from these interviews, a Chemistry of Climate Science Diagnostic Instrument (CCSI) was developed for use in courses that teach chemistry with a rich context such as climate science. The CCSI is designed for professors who want to teach general chemistry, while also addressing core climate literacy principles. It will help professors examine their students' prior knowledge and alternative conceptions of the chemistry concepts associated with climate science, which could then inform their teaching and instruction.

  12. ADVANCED CHEMISTRY BASINS MODEL

    SciTech Connect

    William Goddard III; Lawrence Cathles III; Mario Blanco; Paul Manhardt; Peter Meulbroek; Yongchun Tang

    2004-05-01

    The advanced Chemistry Basin Model project has been operative for 48 months. During this period, about half the project tasks are on projected schedule. On average the project is somewhat behind schedule (90%). Unanticipated issues are causing model integration to take longer then scheduled, delaying final debugging and manual development. It is anticipated that a short extension will be required to fulfill all contract obligations.

  13. Green chemistry: development trajectory

    NASA Astrophysics Data System (ADS)

    Moiseev, I. I.

    2013-07-01

    Examples of applications of green chemistry methods in heavy organic synthesis are analyzed. Compounds, which can be produced by the processing of the biomass, and the criteria for the selection of the most promising products are summarized. The current status of the ethanol production and processing is considered. The possibilities of the use of high fatty acid triglycerides, glycerol, succinic acid, and isoprene are briefly discussed. The bibliography includes 67 references.

  14. Chemistry in nanochannel confinement

    Microsoft Academic Search

    Han J. G. E. Gardeniers

    2009-01-01

    This review addresses the questions of whether it makes sense to use lithographically defined nanochannels for chemistry in\\u000a liquids, and what it is possible to learn from experiments on that topic. The behavior of liquids in different classes of\\u000a pores (categorized according to their size) is reviewed, with a focus on chemical reactions and protein dynamics. A number\\u000a of interesting

  15. (Iodine and tellurium chemistry)

    SciTech Connect

    Beahm, E.C.

    1988-03-16

    The traveler worked with scientists from Great Britain, France, Canada, and the Federal Republic of Germany to produce a program and structure for the Second CSNI Specialists' Workshop on the Chemistry of Iodine in Reactor Safety. This workshop will be held on June 2--3, 1988, in Toronto, Canada. In addition to planning the workshop, there were informal discussions about the status of iodine research in the Federal Republic of Germany and in Canada.

  16. Resources for Chemistry Educators

    NSDL National Science Digital Library

    This site provides annotated Web links to instructional materials and other resources of interest to Chemistry teachers and course designers. The links are carefully selected to represent what the author considers to be the most useful and exemplary resources. Special emphasis is placed on CAI lessons, digital text, Web-based tutorials and similar materials that can serve as alternatives to traditional methods of instruction.

  17. Model confusion in chemistry

    Microsoft Academic Search

    Malcolm Carr

    1984-01-01

    Conclusion  This paper has been a preliminary discussion of model confusion about acids and bases, presenting evidence (some of it to\\u000a be elaborated) that the Arrhenius and the Lowry-Bronsted models are confused in some textbooks, and in many students' minds.\\u000a \\u000a A similar analysis of other concepts in chemistry (are some problems about ions a results of carrying Daltonian and Newtonian\\u000a models

  18. Wet chemistry instrument prototype

    NASA Technical Reports Server (NTRS)

    1974-01-01

    A wet chemistry instrument prototype for detecting amino acids in planetary soil samples was developed. The importance of amino acids and their condensation products to the development of life forms is explained. The characteristics of the instrument and the tests which were conducted to determine the materials compatibility are described. Diagrams are provided to show the construction of the instrument. Data obtained from the performance tests are reported.

  19. Water pollution in estuaries and coastal zones. (Latest citations from the NTIS bibliographic database). Published Search

    SciTech Connect

    NONE

    1996-02-01

    The bibliography contains citations concerning the studies of water pollution in estuaries and coastal zones. Citations examine the development, management, and protection of estuary and coastal resources. Topics include pollution sources, environmental monitoring, water chemistry, eutrophication, models, land use, government policy, and laws and regulations. (Contains 50-250 citations and includes a subject term index and title list.) (Copyright NERAC, Inc. 1995)

  20. Microbial respiration and extracellular enzyme activity in sediments from the Gulf of Mexico hypoxic zone

    EPA Science Inventory

    This study explores the relationship between sediment chemistry (TC, TN, TP) and microbial respiration (DHA) and extracellular enzyme activity (EEA) across the Gulf of Mexico (GOM) hypoxic zone. TC, TN, and TP were all positively correlated with each other (r=0.19-0.68). DHA was ...

  1. 77 FR 6007 - Quarterly Listings; Safety Zones, Security Zones, Special Local Regulations, Drawbridge Operation...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-02-07

    ...Safety Zones, Security Zones, Special Local Regulations, Drawbridge Operation Regulations...safety zones, security zones, special local regulations, drawbridge operation regulations...delegated the authority to issue certain local regulations. Safety zones may be...

  2. 76 FR 70342 - Quarterly Listings; Safety Zones, Security Zones, Special Local Regulations, Drawbridge Operation...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-11-14

    ...Safety Zones, Security Zones, Special Local Regulations, Drawbridge Operation Regulations...safety zones, security zones, special local regulations, drawbridge operation regulations...delegated the authority to issue certain local regulations. Safety zones may be...

  3. Advanced Chemistry Basins Model

    SciTech Connect

    William Goddard; Mario Blanco; Lawrence Cathles; Paul Manhardt; Peter Meulbroek; Yongchun Tang

    2002-11-10

    The DOE-funded Advanced Chemistry Basin model project is intended to develop a public domain, user-friendly basin modeling software under PC or low end workstation environment that predicts hydrocarbon generation, expulsion, migration and chemistry. The main features of the software are that it will: (1) afford users the most flexible way to choose or enter kinetic parameters for different maturity indicators; (2) afford users the most flexible way to choose or enter compositional kinetic parameters to predict hydrocarbon composition (e.g., gas/oil ratio (GOR), wax content, API gravity, etc.) at different kerogen maturities; (3) calculate the chemistry, fluxes and physical properties of all hydrocarbon phases (gas, liquid and solid) along the primary and secondary migration pathways of the basin and predict the location and intensity of phase fractionation, mixing, gas washing, etc.; and (4) predict the location and intensity of de-asphaltene processes. The project has be operative for 36 months, and is on schedule for a successful completion at the end of FY 2003.

  4. Snow chemistry across Antarctica

    NASA Astrophysics Data System (ADS)

    Bertler, N.; Mayewski, P. A.; Aristarain, A.; Barrett, P.; Becagli, S.; Bernardo, R.; Bo, S.; Xiao, C.; Curran, M.; Qin, D.; Dixon, D.; Ferron, F.; Fischer, H.; Frey, M.; Frezzotti, M.; Fundel, F.; Genthon, C.; Gragnani, R.; Hamilton, G.; Handley, M.; Hong, S.; Isaksson, E.; Kang, J.; Ren, J.; Kamiyama, K.; Kanamori, S.; Kärkäs, E.; Karlöf, L.; Kaspari, S.; Kreutz, K.; Kurbatov, A.; Meyerson, E.; Ming, Y.; Zhang, M.; Motoyama, H.; Mulvaney, R.; Oerter, H.; Osterberg, E.; Proposito, M.; Pyne, A.; Ruth, U.; Simões, J.; Smith, B.; Sneed, S.; Teinilä, K.; Traufetter, F.; Udisti, R.; Virkkula, A.; Watanabe, O.; Williamson, B.; Winther, J.-G.; Li, Y.; Wolff, E.; Li, Z.; Zielinski, A.

    An updated compilation of published and new data of major-ion (Ca, Cl, K, Mg, Na, NO3, SO4) and methylsulfonate (MS) concentrations in snow from 520 Antarctic sites is provided by the national ITASE (International Trans-Antarctic Scientific Expedition) programmes of Australia, Brazil, China, Germany, Italy, Japan, Korea, New Zealand, Norway, the United Kingdom, the United States and the national Antarctic programme of Finland. The comparison shows that snow chemistry concentrations vary by up to four orders of magnitude across Antarctica and exhibit distinct geographical patterns. The Antarctic-wide comparison of glaciochemical records provides a unique opportunity to improve our understanding of the fundamental factors that ultimately control the chemistry of snow or ice samples. This paper aims to initiate data compilation and administration in order to provide a framework for facilitation of Antarctic-wide snow chemistry discussions across all ITASE nations and other contributing groups. The data are made available through the ITASE web page (http://www2.umaine.edu/itase/content/syngroups/snowchem.html) and will be updated with new data as they are provided. In addition, recommendations for future research efforts are summarized.

  5. Parapapillary Atrophy: Histological Gamma Zone and Delta Zone

    PubMed Central

    Jonas, Jost B.; Jonas, Shefali B.; Jonas, Rahul A.; Holbach, Leonhard; Dai, Yi; Sun, Xinghuai; Panda-Jonas, Songhomitra

    2012-01-01

    Background To examine histomorphometrically the parapapillary region in human eyes. Methodology/Principal Findings The histomorphometric study included 65 human globes (axial length:21–37 mm). On anterior-posterior histological sections, we measured the distance Bruch's membrane end (BME)-optic nerve margin (“Gamma zone”), BME-retinal pigment epithelium (RPE) (“Beta zone”), BME-beginning of non-occluded choriocapillaris, and BME-beginning of photoreceptor layer. “Delta zone” was defined as part of gamma zone in which blood vessels of at least 50 µm diameter were not present over a length of >300 µm. Beta zone (mean length:0.35±0.52 mm) was significantly (P?=?0.01) larger in the glaucoma group than in the non-glaucomatous group. It was not significantly (P?=?0.28) associated with axial length. Beta zone was significantly (P?=?0.004) larger than the region with occluded choriocapillaris. Gamma zone (mean length:0.63±1.25 mm) was associated with axial length (P<0.001;r2?=?0.73) with an increase starting at an axial length of 26.5 mm. It was not significantly (P?=?0.24) associated with glaucomatous optic neuropathy. Delta zone (present only in eyes with axial length of ?27 mm) was associated with axial length (P?=?0.001) and scleral flange length (P<0.001) but not with glaucoma (P?=?0.73). Conclusions/Significance Parapapillary gamma zone (peripapillary sclera without overlying choroid, Bruch's membrane and deep retinal layers) was related with axial globe elongation and was independent of glaucoma. Delta zone (no blood vessels >50 µm diameter within gamma zone) was present only in highly axially elongated globes and was not related with glaucoma. Beta zone (Bruch's membrane without RPE) was correlated with glaucoma but not with globe elongation. Since the region with occluded choriocapillaris was smaller than beta zone, complete loss of RPE may have occurred before complete choriocapillaris closure. PMID:23094040

  6. Bioorganic First: A New Model for the College Chemistry Curriculum

    NASA Astrophysics Data System (ADS)

    Reingold, I. David

    2001-07-01

    This commentary describes a new approach to the college chemistry curriculum, one that acknowledges that most of the students in the class are more interested in the life sciences than in chemistry. The curriculum is appropriate for both majors and nonmajors. It begins with an organic course that emphasizes connections to biology but leaves out some of the more esoteric topics of sophomore organic chemistry. Sophomore year continues with the more physical material that is traditionally taught to freshmen, but at a higher level. There is a junior-level course that fills in the organic material missing from the freshman course, but is now taught only to those who will need it. The article describes these courses, documents the success of the approach, and points out some of the problems associated with it.

  7. Response of near-stream surface connectivity to water table dynamics during rainfall events at a small headwater catchment (Luxembourg)

    NASA Astrophysics Data System (ADS)

    Frentress, Jay; Martínez-Carreras, Núria; Pfister, Laurent; McDonnell, Jeff

    2014-05-01

    The controls on non-linear streamflow response to changing streamflow sources during precipitation events are poorly understood. Here, we investigate the linkages between surface saturation development and streamflow under a range of wetness conditions for a forested headwater catchment in Luxembourg. Previous work at this site shows a threshold response in stream discharge to changes in soil moisture. This non-linearity is thought to reflect the development of saturation connectivity that drives streamflow response. Furthermore, the catchment has typically large rainfall-runoff ratios during winter, accompanied by long delays to peak after the onset of rainfall. To better understand controls on these behaviors, we examined the response of near-stream surface saturation development to incident precipitation, discharge, and fluctuating groundwater levels during rain events. Specifically, we sought to test the hypothesis that threshold-like response behavior exists between near-stream surface saturation and discharge, as well as quantify changes in surface saturated zone chemistry to better understand mixing between end-member sources during events. We used ground-based thermal infrared imagery to measure surface saturation development in a 4 by 6 m zone in the riparian area. Imagery collected over several months was analyzed to calculate the proportion of saturated area. Water samples from this saturated riparian area, nearby piezometers as well as discharge were collected for analysis of water isotopes, major cations/anions, and silica concentrations. Data analysis is ongoing but preliminary results indicate that saturation extent exhibits a non-linear, threshold-like response to discharge and antecedent wetness conditions. Surface saturation showed strong hysteresis with near-stream groundwater levels, with saturated areas expanding ahead of increasing groundwater levels. As the proportion of saturated area increased during rainfall events, the saturated riparian are and stream isotope signals became more and more depleted, shifting toward groundwater isotope concentrations during events. Stream conductivity, silica, and chloride concentrations also decreased as the proportion of saturated area increased. This suggests that surface saturation during the hydrograph rise is sourced by rainfall and near-surface sources while under high flow conditions it is dominated by exfiltrating groundwater. The threshold-like response of surface saturation and observed chemistry dynamics suggest that the near-stream saturated zone acts as a collection of many small reservoirs, filling and spilling to contribute to streamflow as a single united source—a size and volume which varies according to event size and antecedent conditions.

  8. [Current approach to zoning atomic shipbuilding plants].

    PubMed

    Blekher, A Ia

    2005-01-01

    The paper discusses the currently introduced radiation-and-hygienic system for zoning atomic shipbuilding plants, in accordance with which three radiation-and-hygienic zones (a strict regime zone, a controlled approach zone, and a free regime zone) are established at the plant site and two zones (a sanitary-and-protective zone and a follow-up zone) are also established outside the plant site. PMID:16022252

  9. Anonymous connections and onion routing

    Microsoft Academic Search

    Michael G. Reed; Paul F. Syverson; David M. Goldschlag

    1998-01-01

    Onion routing is an infrastructure for private communication over a public network. It provides anonymous connections that are strongly resistant to both eavesdropping and traffic analysis. Onion routing's anonymous connections are bidirectional, near real-time, and can be used anywhere a socket connection can be used. Any identifying information must be in the data stream carried over an anonymous connection. An

  10. Our Cosmic Connection

    ERIC Educational Resources Information Center

    Young, Donna L.

    2005-01-01

    To help students understand the connection that Earth and the solar system have with the cosmic cycles of stellar evolution, and to give students an appreciation of the beauty and elegance of celestial phenomena, the Chandra X-Ray Center (CXC) educational website contains a stellar evolution module that is available free to teachers. In this…

  11. MedlinePlus Connect

    MedlinePLUS

    ... Web application provide responses in different formats. The Web application returns a link to a formatted MedlinePlus Connect response page. This page will include links to information relevant to the problem/diagnosis, medication, or lab test. For a diagnosis/problem code, the response page ...

  12. A Connective Pedagogy.

    ERIC Educational Resources Information Center

    Goral, Mary

    2000-01-01

    Our increasingly hurried lifestyle, changes in family structure, and intense economic pressures place stress on children and families. Waldorf education provides an educational environment that alleviates this stress through a connective pedagogy that encompasses continuity of people, curriculum, and instruction; a reverence and respect for the…

  13. A School Connectivity Primer.

    ERIC Educational Resources Information Center

    O'Donovan, Eamonn

    2000-01-01

    Provides an overview of school networking options and explores what speedier broadband technologies mean for education. Topics include Ethernet; wireless options for connection to the Internet; local area networks; wide area networks; phone lines; satellite access; cable modems; digital subscriber line (DSL); and funding networks through the…

  14. High power connection system

    DOEpatents

    Schaefer, Christopher E. (Warren, OH); Beer, Robert C. (Noblesville, IN); McCall, Mark D. (Youngstown, OH)

    2000-01-01

    A high power connection system adapted for automotive environments which provides environmental and EMI shielding includes a female connector, a male connector, and a panel mount. The female connector includes a female connector base and a snap fitted female connector cover. The male connector includes a male connector base and a snap fitted male connector cover. The female connector base has at least one female power terminal cavity for seatably receiving a respective female power terminal. The male connector base has at least one male power terminal cavity for seatably receiving a respective male power terminal. The female connector is covered by a cover seal and a conductive shroud. A pair of lock arms protrude outward from the front end of the male connector base, pass through the panel mount and interface with a lever of a lever rotatably connected to the shroud to thereby mechanically assist mating of the male and female connectors. Safety terminals in the male and female connectors provide a last-to-connect-first-to-break connection with an HVIL circuit.

  15. Foinaven subsea system connection

    SciTech Connect

    White, J.; Moore, C.; Sen, P.

    1996-12-31

    The Diverless Maintained Cluster (DMaC) system has progressed from initial concept to deepwater application in the harsh environment West of Shetland. The paper provides a brief history of the development of DMaC, a description of the flowline and umbilical connection used on Foinaven and an explanation of some of the issues involved in applying the concept to a specific development.

  16. Connectionism without the connections

    Microsoft Academic Search

    Stephen R. Deiss

    1994-01-01

    Biological systems which inspire connectionist architecture are based upon axonal point to point connections. As we attempt to engineer ever larger analogues of these neural networks we are forced to multiplex neural signals over time shared paths. This can alter the timing of signal arrival which is critical in oscillatory networks and leads to the bandwidth-synchrony dilemma. This paper further

  17. The parent connection.

    PubMed

    Snodgrass, D M

    1991-01-01

    This paper addresses the role of parents as contributing members of their children's educational team. The effect of parental involvement on academic success is investigated from primary through secondary school levels. Research has repeatedly demonstrated the connection between family and achievement, and this paper supports the premise that parental involvement plays a critical role in children's academic success. PMID:2048485

  18. Connecting with Students.

    ERIC Educational Resources Information Center

    Mendler, Allen N.

    This book outlines positive strategies for bridging the gap between teachers and students through personal, academic, and social connections, offering a guide to help teachers create a personalized refuge of safety and risk-taking for all students. After explaining why and how to use the book, information is presented on: "Identifying Disconnected…

  19. The Game Port Connection.

    ERIC Educational Resources Information Center

    Sievers, Dennis

    1986-01-01

    Provides ideas for using the same port connection of personal computers to interface with laboratory instruments. Contains specific instructions on how to build transducers. Includes plans and diagrams for thermistors and light meters as well as computer programs for displaying instrument readings on monitors. (TW)

  20. The CORALS Connection

    ERIC Educational Resources Information Center

    Plankis, Brian; Klein, Carolyn

    2010-01-01

    The Ocean, Reefs, Aquariums, Literacy, and Stewardship (CORALS) research program helps students connect global environmental issues to local concerns and personal choices. During the 18-week program, students strengthen their understanding of coral reef decline through a classroom aquarium activity, communicate with science experts, and create…