An enzyme present in the microsomes of small intestinal mucosa cells was partially purified by a combination of several conventional methods: solubilization with deoxycholate, (NH&SO4 fractionation, diethylaminoethyl Sephadex column chromatography, carboxymethyl Sephadex treatment, and finally starch zone electrophoresis. The purified enzyme preparation had a specific activity 300 times that of...

background: to evaluate the possible association between phthalate esters (pes) and the occurrence of endometriosis. blood samples were collected from 99 infertile women with endometriosis (study group); 135 age-matched women without endometriosis (control group) but with infertility related to tubal defects, fibroids, polycystic ovaries, idiopathic infertility and pelvic inflammatory diseases ...

Separation, identification, and quantitation by high performance liquid chromatography of prominent carotenoids and carotenol fatty acid esters in various fruits and vegetables are reviewed. Examples of transformations of carotenoids as a result of food preparation are discussed. Recent developments in separation and identification of several carotenoids in human plasma are presented.

A triphenylphosphinegold(I)-catalyzed cyclopropanation of olefins using propargyl esters as gold(I)-carbene precursors is reported. This reaction provided the basis for the use of a DTBM-SEGPHOS gold(I) complex as a catalyst in the enantioselective (up to 94% ee) preparation of vinyl cyclopropanes with high cis-selectivity.

A new metal-free protocol is described for the synthesis of terminal acetals by tandem oxidative rearrangement of olefins using oxone as an oxidant in the presence of iodine. Moreover, a one-pot procedure for the preparation of glycol mono esters from olefins is also presented for the first time using the same reagent system.

Water-triggered self-assembly polycondensation was proposed for preparation of cyclomatrix polyphosphazene nanoparticles from amino acid esters, and a critical solubility parameter was found to determine whether the nanoparticles were formed. Based on this rule, we also investigated the control of the size of its nanoparticles.