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  • SPACE COMMUNICATIONS, SPACECRAFT COMMUNICATIONS, COMMAND AND TRACKING  (1)
  • Skatole/metabolism  (1)
  • 1975-1979  (2)
  • 1
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    Monensin and the prevention of tryptophan-induced acute bovine pulmonary edema and emphysema (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-07-14
    Description: 3-Methylindole, a ruminal fermentation product of tryptophan, induces acute pulmonary edema and emphysema in cattle, and 3-methylindole is present in the ruminal fluid and blood of cows with a natually occurring form of this disease. Monensin, a polyether antibiotic and widely used feed additive for beef cattle, prevented tryptophan-induced acute bovine pulmonary edema and emphysema. Monensin acted by reducing the ruminal conversion of L-tryptophan to 3-methylindole both in vitro and in vivo. Lasalocid, also a polyether antibiotic, showed similar effects in vitro. These results provide a promising approach to prevention of this major respiratory disease of cattle.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hammond, A C -- Carlson, J R -- Breeze, R G -- New York, N.Y. -- Science. 1978 Jul 14;201(4351):153-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/663643" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cattle ; Furans/*therapeutic use ; Lasalocid/therapeutic use ; Monensin/pharmacology/*therapeutic use ; Pneumonia, Atypical Interstitial, of Cattle/*prevention & control ; Rumen/metabolism ; Skatole/metabolism ; Tryptophan/metabolism
    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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    PAPER CURRENT
  • 2
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    An analysis of satellite state vector observability using SST tracking data (1976)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Observability of satellite state vectors, using only SST tracking data was investigated by covariance analysis under a variety of satellite and station configurations. These results indicate very precarious observability in most short arc cases. The consequences of this are large variances on many state components, such as the downrange component of the relay satellite position. To illustrate the impact of observability problems, an example is given of two distinct satellite orbit pairs generating essentially the same data arc. The physical bases for unobservability are outlined and related to proposed TDRSS configurations. Results are relevant to any mission depending upon TDRSS to determine satellite state. The required mathematical analysis and the software used is described.
    Keywords: SPACE COMMUNICATIONS, SPACECRAFT COMMUNICATIONS, COMMAND AND TRACKING
    Type: NASA-CR-152527 , BTS-TR-76-30
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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