نتایج جستجو برای: space flight
تعداد نتایج: 534568 فیلتر نتایج به سال:
Manned space flight induces a reduction in immune competence among crew and is likely to cause deleterious changes to the composition of the gastrointestinal, nasal, and respiratory bacterial flora, leading to an increased risk of infection. The space flight environment may also affect the susceptibility of microorganisms within the spacecraft to antibiotics, key components of flown medical kit...
Serratia marcescens has been detected in space habitats. To explore the influence of the space flight environment on this bacterium, we investigated the genome sequence of LCT-SM166, which was isolated after space flight and has a specific carbon source utilization pattern.
Daniel Holdaway 1,2,* and Yuekui Yang 2,3 1 Global Modeling and Assimilation Office, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA 2 Goddard Earth Sciences Technology and Research, Universities Space Research Association, Columbia, MD 21046, USA; [email protected] 3 Climate and Radiation Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA * Correspondence: d...
The title of the book is misleading, as there are few papers that are related to "medicine." The characteristics of the "physics" papers vary widely. The review type of paper is well illustrated by L. R. Shepard's "Review of Possible Propulsion Systems," which gives the reader a concise outline of some of the principles and quantities involved. A number of papers deal with high-energy particles...
Astronauts returning from space have reduced red blood cell masses, hypovolaemia and orthostatic intolerance, marked by greater cardio-acceleration during standing than before spaceflight, and in some, orthostatic hypotension and presyncope. Adaptation of the sympathetic nervous system occurring during spaceflight may be responsible for these postflight alterations. We tested the hypotheses tha...
The velocity-space sensitivities of fast-ion diagnostics are often described by so-called weight functions. Recently, we formulated weight functions showing the velocity-space sensitivity of the often dominant beam-target part of neutron energy spectra. These weight functions for neutron emission spectrometry (NES) are independent of the particular NES diagnostic. Here we apply these NES weight...
T. J. GOODWIN, L. COATE-LI, R. M. LINNEHAN, AND T. G. HAMMOND Cellular Biotechnology Program, Flight Definition/Cell Biology, National Aeronautics and Space Administration, Johnson Space Center, Wyle Laboratories, Life Sciences-Systems and Services, and Flight Crew Operations, National Aeronautics and Space Administration, Johnson Space Center, Houston, Texas 77058; and Tulane Environmental Ast...
1 Earth System Science Interdisciplinary Center, University of Maryland, College Park, MD, USA, 2 Global Modeling and Assimilation Office, National Aeronautics and Space Administration Goddard Space Flight Center, Greenbelt, MD, USA, 3 Cryospheric Sciences Laboratory, National Aeronautics and Space Administration Goddard Space Flight Center, Greenbelt, MD, USA, 4 Science Applications Internatio...
Periodically, commercially available (commercial off the shelf, COTS) optical fiber cable assemblies are characterized for space flight usage under the NASA Electronic Parts and Packaging Program (NEPP). The purpose of this is to provide a family of optical fiber cable options to a variety of different harsh environments typical to space flight missions. The optical fiber cables under test are ...
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