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  • 1
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    Nitrate and nitrite: origin in humans (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-09-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Witter, J P -- Gatley, S J -- Balish, E -- New York, N.Y. -- Science. 1979 Sep 28;205(4413):1335-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17732310" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Distribution of nitrogen-13 from labeled nitrate (13No3-) in humans and rats (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-04-27
    Description: The body distribution of gavaged or intravenously administered nitrate labeled with nitrogen-13 was studied in humans and rats with the following results: (i) the labeled compound is not quickly absorbed from the stomach; (ii) the concentration of the label increases inside the lower intestinal tract (cercum and large intestine) when ingested or intravenously injected; and (iii) humans and rats have the capacity to store a portion of the label in their bodies. These observation indicate that depletion of body stores, the passage of nitrate down the gut, or the secretion of nitrate into the intestinal lumen may be a better explanation of the urinary, ileal, and fecal concentrations of nitrate and nitrite recently measured in humans that a bacterial nitrification reaction in the intestines, as suggested by Tannenbbaum et al.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Witter, J P -- Gatley, S J -- Balish, E -- New York, N.Y. -- Science. 1979 Apr 27;204(4391):411-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/441728" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Gastric Mucosa/metabolism ; Humans ; Intestinal Absorption ; Intestines/metabolism ; Nitrates/blood/*metabolism ; Nitrites/metabolism ; *Nitrogen Radioisotopes ; Rats ; Tissue Distribution
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    Evaluation of nitrate synthesis by intestinal microorganisms in vivo (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-07-24
    Description: The nitrate balance of germfree and conventional rats was assessed to determine whether the intestinal flora produces nitrate in vivo. The results indicate that there can be excess nitrate in the urine of germfree as well as conventional rats. This nitrate is apparently of host origin, and the presence of intestinal flora decreases the output of nitrate in urine.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Witter, J P -- Gatley, S J -- Balish, E -- New York, N.Y. -- Science. 1981 Jul 24;213(4506):449-50.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7244641" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Germ-Free Life ; Glucose/metabolism ; Intestines/*microbiology ; Nitrates/*metabolism ; Oxidation-Reduction ; Rats
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 4
    Electronic Resource
    Electronic Resource
    High-performance liquid chromatographic analysis of nitrate in urine and feces
    Amsterdam : Elsevier
    Journal of Chromatography B: Biomedical Sciences and Applications 229 (1982), S. 450-454 
    Details
    ISSN: 0378-4347
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/S0378-4347(00)84289-9
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    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Methionine biosynthesis in Escherichia coli: Induction and repression of methylmethionine(or adenosylmethionine):Homocysteine methyltransferase
    Amsterdam : Elsevier
    Archives of Biochemistry and Biophysics 119 (1967), S. 62-68 
    Details
    ISSN: 0003-9861
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0003-9861(67)90429-8
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    Paper (German National Licenses)
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  • 6
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    Effect of space flight on cell-mediated immunity (1977)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: The cell-mediated immune response to Listeria monocytogenes was studied in rats subjected to 20 days of flight aboard the Soviet biosatellite Kosmos 7820. Groups of rats were immunized with 1,000,000 formalin-killed Listeria suspended in Freunds Complete Adjuvant, 5 days prior to flight. Immunized rats subjected to the same environmental factors as the flight rats, except flight itself, and immunized and nonimmunized rats held in a normal animal colony served as controls. Following recovery, lymphocyte cultures were harvested from spleens of all rats, cultured in vitro in the presence of L. monocytogenes antigens, Phytohemagglutinin, Conconavlin A, or purified protein derivative (PPD), and measured for their uptake of H-3-thymidine. Although individual rats varied considerably, all flight and immunized control rats gave a blastogenic response to the Listeria antigens and PPD. With several mitogens, the lymphocytes of flight rats showed a significantly increased blastogenic response over the controls. The results of this study do not support a hypothesis of a detrimental effect of space flight on cell-mediated immunity. The data suggest a possible suppressive effect of stress and gravity on an in vitro correlate of cell-mediated immunity.
    Keywords: LIFE SCIENCES (GENERAL)
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    NASA TECHNICAL REPORTS
  • 7
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    Effect of a prolonged stay in a locked environment on the microbial flora in dogs (1974)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: Ten purebred Beagle dogs (all males) were used to determine the effect of a prolonged stay in a locked environment (i.e., no exogenous microbial contamination) on the microbial flora. At monthly intervals the microbial profile (feces, nose, and throat) of each dog was assessed. After 12 months it was found there was no drastic alteration or simplification of the microbial profile of isolated or control dogs. Although isolated dogs had slightly higher levels of anaerobic bacteria and somewhat lower levels of enterococci, the major groups of anaerobic, aerobic, and facultative bacteria remained qualitatively and quantitatively similar for the 12-month study period. Although they were only minor components of the fecal flora, Candida albicans and Shigella sonnei were consistently isolated in larger numbers from the dogs in the locked environment.
    Keywords: LIFE SCIENCES (GENERAL)
    Type: Aerospace Medicine; 45; Nov. 197
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    NASA TECHNICAL REPORTS
  • 8
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    Effect of 30 months in a locked environment on the microbial flora of dogs (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: It has been proposed that the microbial flora of mammals would simplify to a few microbial species if the host animal was confined to a 'locked' environment and provided with sterile food, water, and air. This paper updates information on the microbial profile (feces, nose and throat) of purebred beagles housed in the above-mentioned conditions through a 30-month study period and demonstrates that no drastic decrease or simplification of the microbial profile occurred in isolated or control dogs.
    Keywords: LIFE SCIENCES (GENERAL)
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    NASA TECHNICAL REPORTS
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