Gracilariopsis Persica (Rhodophyta) is one of the most abundant algae, introduced newly from the Indian Ocean. In this study, the main sterols of the algae have been isolated and identified. Separation and purification of the compounds was carried out on silica gel and sephadex LH20 column chromatography (CC) and high performance liquid chromatography (HPLC) to obtain five pure compounds 1-5. S...

This cross-sectional study enrolled 180 patients at a private family practice in Virginia. Total serum vitamin D concentrations were obtained weekly from January 30, 2013, through March 30, 2013, in consecutive patients regularly scheduled for laboratory work at the practice. Patients were categorized into 2 groups and analyzed for variant alleles in vitamin D receptor ( VDR; rs2228570), cytoch...

Since P450scc transforms 7-dehydrocholesterol (7DHC) to 7-dehydropregnenolone (7DHP) in vitro, we investigated sequential 7DHC metabolism by adrenal glands ex vivo. There was a rapid, time- and dose-dependent metabolism of 7DHC by adrenals from rats, pigs, rabbits and dogs with production of more polar 5,7-dienes as detected by RP-HPLC. Based on retention time (RT), UV spectra and mass spectrom...

Department of Building and Industrial Production Engineering, University CEU Cardenal Herrera Avda.Seminario s/n, 46113, Moncada, Valencia, Spain Email: [email protected], [email protected], [email protected], [email protected] (*corresponding author), web page: http://www.uchceu.es Departamento de Ingeniería Mecánica y de Materiales, Universidad Politécnica de Vale...

A. Nature of the research problem Adequate vitamin D is essential for normal human growth and development; insufficient vitamin D compromises long term health, and increases the risk of chronic disease. In recent years, reports in the medical literature have indicated that vitamin D deficiency in the US is widespread and rising. In humans, vitamin D is derived primarily through the effect of so...