euphorbia macrostegia or persian wood spurge is one of the seventeen endemic plants of this genus in iran. three triterpenoids: 24-methylenecycloartan-3β-ol (1), butyrospermol (2) and cycloartenol (3) and three diglycerides: 1,2-di-o-α-linolenoyl-sn-glycerol (4), 1-o-linoleoyl-3-o-palmitoyl-sn-glycerol (5) and 1-o-α-linolenoyl-2-o-palmitoyl-sn-glycerol (6) were isolated from a hexane layer of m...

A highly purified lipase was prepared from the particulate fraction of rat adipose tissue. Although the lipase catalyzes the hydrolysis of diglycerides and triglycerides of both long and short chain fatty acids, monoglycerides are not hydrolyzed. The enzyme has a marked specificity toward fatty acids esterified to the primary hydroxyl groups and hydrolyzes a,-diglycerides 10 times more rapidly ...

The fatty acid composition of the major lipids of the chloroplast membranes, the mono- and digalactosyl diglycerides, can be definably altered with various substituted pyridazinones. Galactolipid fatty acid composition of wheat (Triticum aestivum L.) can be altered so that there is a decrease in linolenic acid accompanied by an increase in linoleic acid without a shift in the relative proportio...

Lipid composition of the fat body and haemolymph of male milkweed bug, On.cc@eltus fasciatus, was determined. Triglycerides were the predominant lipids of the fat body while diglycerides accounted for the major lipid in the haemolymph. Sterols, sterol esters, and non-esterified fatty acids were present in both fat body and haemoIymph besides triglycerides and diglycerides. Only traces of monogl...

The evidence presently available indicates that the final step in the synthesis of triglycerides in liver is the esterification of an Q: ,/3-diglyceride by an activated fatty acid (I, 2). Weiss, Kennedy, and Kiyasu (1, 3) have demonstrated this esterification reaction in a particulate preparation of chicken liver with palmityl coenzyme A and various diglycerides as substrates. Recently, Steinbe...

The lipid of Euglena gracilis, dark-grown in a complete medium, contained 2% galactose. The lipid of Euglena gracilis, light-grown in either a complete or an inorganic medium, contained 13-14% galactose. Pure monogalactosyl and digalactosyl diglyceride fractions, isolated by column plus thin-layer chromatography, contained 50% of the lipid-bound galactose of dark-grown cells, and 80% of that of...

1. The use of HF as a dephosphorylating reagent for phospholipids was examined. 2. Hydrolysis of phosphatidylethanolamine at 0 degrees C for 24h with 60% HF gives a good yield of diglyceride. Under similar conditions phosphatidyldiglucosyl diglyceride gives diglyceride and diglucosyl diglyceride. 3. The glycolipid is also obtained from hydrolysis of glycerylphosphoryldiglucosyl diglyceride. No ...

The bolus intravenous injection of a novel medium-chain triglyceride:fish oil emulsion (MCT:FO, 8:2, w:w) was recently found to increase within 60 min the leucocyte and platelet phospholipid content of long-chain polyunsaturated omega3 fatty acids. The present report deals with the effects of bovine milk lipoprotein lipase on the lipid composition of this emulsion. The results are compared to t...

The incorporation of (14)C-labelled myristic, palmitic, stearic, oleic and linoleic acids in vitro into the lipids of bovine spermatozoa was measured at intervals from 2min to 2h. All acids were rapidly incorporated into diglycerides, myristic acid being metabolized to the greatest extent. Whereas the low incorporation of acids into total phospholipids reflected the relative stability of the ma...

Euphorbia macrostegia or Persian wood spurge is one of the seventeen endemic plants of this genus in Iran. Three triterpenoids: 24-methylenecycloartan-3β-ol (1), butyrospermol (2) and cycloartenol (3) and three diglycerides: 1,2-di-O-α-linolenoyl-sn-glycerol (4), 1-O-linoleoyl-3-O-palmitoyl-sn-glycerol (5) and 1-O-α-linolenoyl-2-O-palmitoyl-sn-glycerol (6) were isolated from a hexane layer of m...