Pigment I (4,4/-diapocarotene-4-oic acid). — This component comprised about 8% of the total pigment content and was relatively nonpolar. The UV/VIS-absorption spectrum in ethanol showed two maxima at 477 and 508 nm and an inflexion at 456 nm. Saponification, acetylation, and reduction tests (NaBH4) were negative. The acidic nature of the pigment pointed to the presence of a carboxylic group. Th...

A method for measuring cholesterol in 0.1 ml. of blood serum is described. This uses the saponification and extraction procedure of Abell et al. (4) and the color reaction of Zlatkis et al. (7). The procedure is shown to be accurate and reproducible. It is compared with several commonly used proceduresand shown to be equal or superior to these. An adaptation of the method to filter-paper stored...

to recent volumes of the Indian Medical Gazette, e.g., an article on rupture of the spleen which does not refer to the papers of Lieutenant-Colonel D. G. Crawford, or on c/avja insanity which knows not the papers by Ewens and Robertson-Milne or one on saponification which omits reference to the various papers in recent years discussing adipocere in India can scarcely be called up to date. In sp...

Figure 1. Right leg with painful ulcer demonstrating thrombosed blood vessels, saponified fat, and ischemic skin necrosis. DESCRIPTION A 56-year-old man presented with a wound of the right leg for 6 weeks that progressed from a linear ulceration with surrounding erythema to an excruciatingly painful ulcer with fat saponification and visible thrombosed vessels. His medical history was significan...

This research investigated the water influence on biodiesel production via transesterification, and especially their kinetic parameters. The initial rate of transesterification was increased with increasing amount (0–5 wt%). On contrary, significantly reduced for concentration 8–15 wt%. Moreover, when yield reached maximum value 30–40%, saponification as a side reaction became more significant ...

The use of derivatization in the analysis of food additivies by chromatographic means has been reviewed. The large majority of these derivatization techniques are employed to facilitate the gas-liquid chromatographic quantitation of various food additives. Silylation, alkylation, acylation, as well as transesterification, saponification, and chemical decomposition techniques are discussed. The ...

All four stereoisomers of coronamic acid were synthesized from both enantiomers of 1,2-butanediol. Cyclopropanation of cyclic sulfate with the dibenzyl malonate' anion gaye cyclopropane dibenzyl ester in a quantitatiye ield. Transformation into a protected amino acid was achieyed by stereoselectiye hydrolysis and Cunius rearrangement as the key steps. Saponification and subsequent acidic hydrol...

The synthesis of novel amide derivatives of benzosuberone 7a-j from commercially available benzosuberone was successfully achieved in six steps. Some of the important reactions that are involved in the synthesis are (i) insertion of methylester (ii) Suzki reaction and (iii) saponification followed by amide bond formation. The newly synthesis benzosuberone derivatives 7a-j were screened for anti...