The antioxidant activities of the chloroform, ethyl acetate and n-butanol extract fractions from propolis collected in Anhui, China were evaluated in this study. The ethyl acetate fraction contained the highest amount of total phenolics and total flavonoids, and showed the greatest 1,1-diphenyl-2-picrylhydrazyl radical (DPPH) and 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) diammonium...

Beaumontia grandiflora Wall. (Apocynaceae) is an ornamental plant cultivated in Egypt. Investigation of the chemical constituents of the aerial parts of B. grandiflora Wall. in pet. ether extract led to isolation and identification of twelve fatty acids in which linoleic acid (29.60%) and Palmitic acid (19.12%) are the main acids. The unsaponifiable fraction was found to contain a series 14 27 ...

The effects of extracting solvents (dichloromethane, ethyl acetate and methanol) on the valerenic acid content and antioxidant activity of roots extracts of Valeriana jatamansi (cultivated and wild) were investigated. The tested plant extracts contained appreciable amounts of valerenic acid content which affects the antioxidant potential of plant extracts. Higher concentration of valerenic acid...

The ability of the FeKal CON-Trate system (Trend Scientific, Minneapolis, Minn.) to recover parasite ova, cysts, or larvae from 300 fecal specimens was compared with that of the Formalin-ethyl acetate sedimentation technique. One hundred stool samples had previously been determined to contain 129 parasite forms. The FeKal system detected 127 parasites (sensitivity, 98.4%), and the Formalin-ethy...

School of Physics, Alagappa University 1 , Karaikudi 630 003, Tamil Nadu, India Department of Physics 2 , Department of Mechanical Engineering 3 , Syed Ammal Engineering College, Ramanathapuram-623 502, Tamil Nadu, India ABSTRACT: The homo and hetero interaction in the binary mixtures of Ethyl acetate + n-Butylamine, Ethyl acetate + Cyclohexylamine and Ethyl acetate + Diethylamine has been inve...

..A.LMOST ALL the neutral urinary 17-ketosteroids are conjugated with either sulfuric or glucuronic acids. These conjugates can be cleaved by strong acids at elevated temperatures (1), or by solvolysis in either ethyl acetate or tetrahydrohiran, each containing perchioric acid (2). Selective hydrolysis of steroid-glucuronosicles is achieved with $-glucuromi_ idase, although in some 1i1#{149}ill...

The main objective of this study was to evaluate the influence of the formulation and process parameters on PLGA microparticles containing a practically insoluble model drug (ibuprofen) prepared by the o/w solvent evaporation method. Multivariate data analysis was used. The effects of altered stirring speed of a mechanical stirrer (600, 1000 rpm), emulsifier concentrations (PVA concentration 0....

The present study aimed to investigate the effect of ethyl acetate fraction of A. cepa bulb on mating behavior in paroxetine-induced sexually dysfunction male rats. Sexual dysfunctions such as decreased libido, delayed orgasm, difficulties in maintaining an erection, and inhibition of ejaculation are common side effects of paroxetine. A. cepa bulb ethyl acetate fraction (200 mg/kg) was administ...

Acanthamoeba spp. commonly cause Acanthamoeba keratitis which is typically associated with the wear of contact lenses. Therefore, finding an economic, efficient, and safe therapy of natural origin is of outmost importance. This study examined the in vitro lethal potential of ethyl acetate and methanol extracts of Helianthemum lippii (L.) (sun roses) against Acanthamoeba castellanii cysts isolat...

ethyl hexanoate (ethyl caproate), and 2-phenylethyl acetate are typical of the carboxylate esters produced by yeasts of the genus Saccharomyces, which are widely used in brewing.i) Two kinds of ester synthetic pathway have been proposed for yeast. One involves the transfer of an acyl group from acyl-CoA to alcohol, catalyzed by alcohol acyltransferase2) or alcohol acetyltransferase (2MTase).3) ...