Research reports: 1991 NASA/ASEE Summer Faculty Fellowship Program

The basic objectives of the programs, which are in the 28th year of operation nationally, are: (1) to further the professional knowledge of qualified engineering and science faculty members; (2) to stimulate an exchange of ideas between participants and NASA; (3) to enrich and refresh the research and teaching activities of the participants' institutions; and (4) to contribute to the research objectives of the NASA Centers. The faculty fellows spent 10 weeks at MSFC engaged in a research project compatible with their interests and background and worked in collaboration with a NASA/MSFC colleague. This is a compilation of their research reports for summer 1991

NASA SBIR abstracts of 1990 phase 1 projects

The research objectives of the 280 projects placed under contract in the National Aeronautics and Space Administration (NASA) 1990 Small Business Innovation Research (SBIR) Phase 1 program are described. The basic document consists of edited, non-proprietary abstracts of the winning proposals submitted by small businesses in response to NASA's 1990 SBIR Phase 1 Program Solicitation. The abstracts are presented under the 15 technical topics within which Phase 1 proposals were solicited. Each project was assigned a sequential identifying number from 001 to 280, in order of its appearance in the body of the report. The document also includes Appendixes to provide additional information about the SBIR program and permit cross-reference in the 1990 Phase 1 projects by company name, location by state, principal investigator, NASA field center responsible for management of each project, and NASA contract number

NASA SBIR abstracts of 1991 phase 1 projects

The objectives of 301 projects placed under contract by the Small Business Innovation Research (SBIR) program of the National Aeronautics and Space Administration (NASA) are described. These projects were selected competitively from among proposals submitted to NASA in response to the 1991 SBIR Program Solicitation. The basic document consists of edited, non-proprietary abstracts of the winning proposals submitted by small businesses. The abstracts are presented under the 15 technical topics within which Phase 1 proposals were solicited. Each project was assigned a sequential identifying number from 001 to 301, in order of its appearance in the body of the report. Appendixes to provide additional information about the SBIR program and permit cross-reference of the 1991 Phase 1 projects by company name, location by state, principal investigator, NASA Field Center responsible for management of each project, and NASA contract number are included

Aerospace medicine and biology: A continuing bibliography with indexes (supplement 375)

This bibliography lists 212 reports, articles, and other documents recently introduced into the NASA Scientific and Technical Information System database. Subject coverage includes the following: aerospace medicine and physiology, life support systems and man/system technology, protective clothing, exobiology and extraterrestrial life, planetary biology, and flight crew behavior and performance

Technology 2001: The Second National Technology Transfer Conference and Exposition, volume 2

Proceedings of the workshop are presented. The mission of the conference was to transfer advanced technologies developed by the Federal government, its contractors, and other high-tech organizations to U.S. industries for their use in developing new or improved products and processes. Volume two presents papers on the following topics: materials science, robotics, test and measurement, advanced manufacturing, artificial intelligence, biotechnology, electronics, and software engineering

Chemical Information Bulletin

Periodic supplement for "the regular journals of the American Chemical Society," containing annotated bibliographies of chemical documentation literature as well as information about meetings, conferences, awards, scholarships, and other news from the American Chemical Society (ACS) Division of Chemical Literature

Key Topics in Deep Geological Disposal : Conference Report (KIT Scientific Reports ; 7696)

The current state of knowledge of central aspects of radioactive waste repository research was presented in the course of the DAEF conference "Key topics in deep geological disposal". For the first time socio-economic and socio-technical issues played an important role within a conference focusing on the disposal of radioactive waste. Scientists from about 16 different countries presented their scientific work in 8 sessions and during a poster session

Annual Report 2011 - Institute of Radiochemistry

The Institute of Radiochemistry (IRC) is one of the seven institutes of the Helmholtz-Zentrum Dresden-Rossendorf (HZDR). The research activities are fully integrated into the “Nuclear Safety Research Program” of the Helmholtz Association and focused on the topic “Safety of Nuclear Waste Disposal”. The research objectives are to generate better process understanding and data for the long-term safety analysis of a nuclear waste disposal in the deep geological underground. A better knowledge about the dominating processes essential for radionuclide (actinide) mobilization and immobilization on the molecular level is needed for the assessment of the macroscopic processes which determine the transport and distribution of radioactivity in the environment. Special emphasis is put on the biological mediated transport of long-lived radionuclides in the geosphere and their interaction with different biosystems like biota and human organism for a better calculation of environmental and health risks. Advanced knowledge is needed for description of the processes dominating at the interfaces between geo- and bio-systems related to the distribution of long-lived radionuclides in various bio-systems along the food chain

Studies of Some Inorganic Reaction Mechanisms

Part I The compound dihydridotetrakis (diethylphenylphosphonite)-iron(II) is known to undergo rapid rearrangement in solution. Considerable discussion has been presented to formulate a mechanism for this rearrangement. This discussion is based on a rearrangement between cis and trans dihydride isomers of octahedral stereochemistry. We present here some experimental evidence which shows the identification of one isomer (as the trans dihydride) is incorrect and also that the changes that occur are more complicated than the earlier workers proposed. Infrared, Raman, and very low temperature 1H n. m. r. spectra of both the iron and ruthenium compounds are used to construct a different picture of this system. We identify three distinct reactions or rearrangements that are occurring and offer some proposals for the structures of the isomers. A non-classical six-coordinate structure based on a tetrahedral skeleton of phosphorus atoms about the central metal is considered the most reasonable identification of the non-cis isomer. Part II Nitric oxide undergoes many reactions to form transition metal nitrosyls of varying geometry. Under very special conditions, it then continues to react to form a species with nitrogen to nitrogen bonds. We have studied one of these reactions in detail: First, to establish the stoichiometry of the reaction exactly and second, to gain some insight into the mechanism of the dimerization step. There is an initial rapid reaction of an ammoniacal Co(II) solution and NO with the stoichiometry one NO per cobalt(II). The NO pressure dependence of the ratio NO to cobalt is given experimentally. A qualitative proposal is made to explain this dependence, but we are still searching for a quantitative description. There is a much slower reaction that consumes additional nitric oxide, producing N2O and nitrite ions. If the initial cobalt(II) concentration is high, an additional product is obtained, the μ-hyponitrito bis(pentaammine cobalt(III)) ion, usually precipitated as the nitrate. The yield of the dimeric cation as a function of concentration, anion, and temperature are given. A proposal of a linkage isomerization of an unstable dimer of pentaamminenitrosyl cobalt(III) is offered to explain the experimental observations. Part III The decomposition of nitric oxide to elements in the gas phase is a thermodynamically favored reaction that is very slow at low temperatures (below 1000°K). Some catalysts are known for this reaction carried out in a heterogeneous reactor. Work has been performed jointly with the chemical engineering faculty to try to understand the reaction over one of the known catalysts. The rate limiting factor is shown to be the strong inhibition by the product oxygen rather than any intrinsically slow reaction of NO. An interpretation of both our results and the results of another group is offered in terms of a unimolecular decomposition on a surface.</p