✍ Scribed by H. Pénau; G. Hagemann
No coin nor oath required. For personal study only.
Dans cette note, il nous a paru intéressant de préciser les caractères physiques du calciférol chimiquement pur qui doit être employé en thérapeutique pour les doses massives utilisées par les cliniciens dans les diverses formes de tuberculose.
📜 SIMILAR VOLUMES
## Abstract The sensitivity of a direct spectrophotometric determination of vitamin D~2~ (calciferol), based on its ultra‐violet absorption, proved to be 1 microgram/ml., or better. Compared with the current colorimetric techniques, the ultra‐violet method is capable of a much higher accuracy.‐The
## Abstract The synthesis of some esters of 1‐diethylamino‐3‐fluoro‐propan‐2‐olis described. The nitrobenzoic ester is transformed with very good yield into the corresponding aminobenzoic ester by reduction with Sn and HC1 or by catalytic hydrogenation.
**Electron Impact Mass Spectrometry of the 3‐Desoxy‐1,2: 5,6‐di‐__O__‐isopropylidene‐3‐methylidene‐δ‐D‐hexofuranose and Some C(3′)‐Substituted Analogues** The mass spectra of the 3‐desoxy‐1,2:5, 6‐di‐__O__‐isopropylidene‐3‐methylidene‐ α‐D‐__ribo__‐hexofuranose and of some C(3′)‐mono‐ and ‐disubsti
## Abstract Decadien‐2(E), 4(Z)‐yl isovalerate, sandaracopimara‐8(14), 15‐diene, dehydroabietane and manoyl oxide have been isolated from the cypress essential oil. The determination of the structure and the spectral parameters of this compounds is described.
Correlations between mass spectra and molecular structure are attempted in a series of cis and trans 1,2-diaIkylcyclohexanes previously investigated. Rather large differences appear between abundances of main fragment ions, especially (P-R1)+ (parent ion having lost the Rl group) and (P-Rl-H)+, some