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All sourcesNASA NTRSDOE OSTI
NASA NTRS1975

Spectra and structure of organophosphorus compounds. XII - Infrared and Raman spectra of /CH3/2PH and /CD3/2PH

The vibrational spectra of (CH3)2PH and (CD3)2PH have been studied and assignments made. In the infrared, the region between 4000 and 33 wavelength/cm was recorded for the gaseous and solid states, while Raman spectra from 3500 to 10 wavelength/cm in the gaseous, liquid and solid states were observed. There is some evidence of weak hydrogen bonding, based on the behavior of the phosphorus-hydrogen stretching and bending modes. There also appears to be considerable interaction between the methyl rocking and phosphorus-carbon stretching modes. The a double prime and a prime torsional modes appear to be accidentally degenerate at 182 and 142 wavelength/cm for the 'light' and 'heavy' compounds, respectively. This gives barriers of 2.14 and 2.30 kcal/mole, respectively.

Durig, J. R.↗
NASA NTRS1994

Vitamin D Status in Monkey Candidates for Space Flight

In preparation for the Cosmos 2229 Biosatellite space flight experiments in Rhesus monkeys, we evaluated the status of vitamin D in animals of different origins: candidates for space flight raised in Moscow (IMBP) and animals housed at Ames Research Ctr. (ARC) for pilot studies. Diets at IMBP were natural foods found by analysis to contain 1.4% Ca, 2.8% P and<240 IU D3/kg and at ARC standard monkey chow with 0.9% Ca, 0.5% P and 6600 IU D3/kg. We measured body weights (BW), serum calcium (TCa), total protein (TP), phosphorus (Pi), alkaline phosphatase (AP), 25-hydroxyvitamin D (25D) and 1,25-dihydroxyvitamin D (1,25D) in 16 IMBP and 15 ARC male animals and indices of bone formation in cancellous bone obtained from iliac crest biopsy of 6 IMBP and 13 ARC animals. BW were the same in juveniles at IMBP as ARC although ARC monkeys were born a year later. Mean(1SD) TCa and TP were higher and 25D lower (1819 vs. 93+18 ng/ml,p<.001) in IMBP than ARC animals. 1,25D (174156 vs. 212+77 pg/ml), Pi and AP were similar. In bone, osteoid and osteoblast surfaces averaged 38114% and 33+15% in all, with %vol. of osteoid higher in IMBP than ARC monkeys of the same BW (p<.05) Indices of bone formation were inversely related to 25D, not 1,25D. Of interest are similar 1,25D levels associated with a wide range of substrate and extensive osteoid in bone of D replete animals.

Arnaud, S. B.↗