𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Studies on vitamin D and related compounds XXIV new irradiation products of previtamin D3. Toxisterols.

✍ Scribed by F. Boomsman; H.J.C. Jacobs; E. Havinga; A. van der Gen


Publisher
Elsevier Science
Year
1975
Tongue
French
Weight
206 KB
Volume
16
Category
Article
ISSN
0040-4039

No coin nor oath required. For personal study only.


πŸ“œ SIMILAR VOLUMES


Studies on vitamin D and related compoun
✍ J. L. M. A. Schlatmann; E. Havinga πŸ“‚ Article πŸ“… 2010 πŸ› Elsevier Science 🌐 English βš– 693 KB

## Abstract The syntheses are described of previtamin D ‐ and vitamin D analogues to be used for the study of the thermal precalciferol ⇋ calciferol isomerization reaction. A previtamin D analogue (4) prepared as indicated by Inhoffen could not be obtained in a pure state. Closer inspection reveal

Studies on vitamin D and related compoun
✍ A. Verloop; A. L. Koevoet; R. van Moorselaar; E. Havinga πŸ“‚ Article πŸ“… 2010 πŸ› Elsevier Science 🌐 English βš– 393 KB

## Abstract Details on the iodine‐catalyzed reactions of previtamin D, tachysterol, __cis‐__ and __trans__‐vitamin D (influence of solvent, concentration, wavelength of light) are given. The possibility of a previtamin D determination based on the __cis/trans__ isomerisation is indicated. Some resu

Studies on vitamin D and related compoun
✍ R. J. de Kock; G. van der Kuip; A. Verloop; E. Havinga πŸ“‚ Article πŸ“… 2010 πŸ› Elsevier Science 🌐 English βš– 355 KB

## Abstract Irradiation of ergosterol, lumisterol, tachysterol or previtamin D at room temperature for a long time brings about a considerable lowering of the extinction in the region 220‐300 mΞΌ, whereas this phenomenon is not observed on irradiation of these compounds at 80Β°K in solid solution. Fr

Studies on vitamin D and related compoun
✍ A. Verloop; G. J. B. Corts; E. Havinga πŸ“‚ Article πŸ“… 2010 πŸ› Elsevier Science 🌐 English βš– 516 KB

## Abstract The photochemical conversion of isotachysterol~2~ (in ether) has been studied; the effects of wave‐length and time of irradiation on the composition of the irradiation mixture are discussed. On chromatography of the crude irradiation product a compound was obtained in a pure, non‐crysta