The extraction of yacon [Smallanthus sonchifolius (Poepp. and Endl.) H. Robinson; Asteraceae] leaves and chromatographic separation yielded two new antibacterial melampolide-type sesquiterpene lactones, 8beta-tigloyloxymelampolid-14-oic acid methyl ester and 8beta-methacryloyloxymelampolid-14-oic acid methyl ester, as well as the four known melampolides, sonchifolin, uvedalin, enhydrin and fluc...

chyuri (Diploknema butyracea (roxburgh) H. J. lam) is widely used in nepal for its medicinal properties and as a source of chyuri ghee (fat) extracted from the seeds. the main purpose of the present study was the gc-MS analysis of fatty acids in seed fat of chyuri after acidic methanolysis. Palmitic acid methyl ester (1), linoleic acid methyl ester (2), oleic acid methyl ester (3) and steric ac...

Two new triterpenoid glycosides were isolated (one of them as the methyl ester) as major components from leaves of Ilex chinensis Sims (Aquifoliaceae) . The structures of these glycosides, termed ilexoside A (1) and ilexoside B methyl ester (2a), have been established to be 3ƒÀ-ƒ-(ƒÀ-Dxylopyranosyl)siaresinolic acid and 3ƒÀ-ƒ-(ƒÀ-D-xylopyranosyl)pomolic acid methyl ester , respectively, based o...

The amide-linked local anesthetics can be used safely in patients susceptible to malignant hyperthermia (MH). 4-Hydroxybenzoic acid methyl ester contained as a preservative in local anesthetic solution was suspected to have triggered MH in a patient who had received nerve block with lidocaine solution. The author investigated the effects of 4-hydroxybenzoic acid methyl ester on Ca(2+)-related f...

This paper presents trends in the high pressure solubility measurements of long chain saturated methyl esters (methyl decanoate, methyl dodecanoate, methyl tetradecanoate, methyl hexadecanoate, methyl octadecanoate and methyl docosanoate) in supercritical ethane between 313 K and 353 K and for mass fractions between 0.65 and 0.018. The data shows generally a linear relationship between the solu...

The aim of this study was to investigate whether S-(-)-10,11-dihydroxyfarnesic acid methyl ester produced by cell subtype Beauveria bassiana CS1029 causes acute toxicity when used for cosmetic purposes by performing an eye irritation test. New Zealand white (NZW) rabbits were treated with a 100 mg/dose of S-(-)-10,11-dihydroxyfarnesic acid methyl ester according to standard procedure guidelines...

1. Rat-liver supernatant preparations are capable of achieving the biological sulphation of l-tyrosine methyl ester, the reaction proceeding maximally at a substrate concentration of 30 mm and at pH 7.0. 2. Two sulphated products are formed, one of which has been identified as l-tyrosine O-sulphate. On the basis of indirect evidence the other product can be assumed to be l-tyrosine O-sulphate m...

Biodiesel, an alternative fuel derived from lipid feedstocks, such as vegetable oil or animal fat, is mainly composed of saturated and unsaturated fatty acid alkyl esters. Fuel suppliers, terminal operators, and users are becoming more concerned with monitoring and maintaining good biodiesel fuel quality with respect to oxidative degradation during storage. The oil stability index (OSI), a para...

Morula (Sclerocarya birrea) beer is a seasonal homemade alcoholic beverage made from morula fruits pulp. Unlike the commercial beverage, alcohol content of not known. The major challenges with beverages arise batch-to-batch differences in product quality and safety due to variability raw materials lack control. Consequently, by same individual may differ. In this study, validated liquid-liquid ...