Sterols due to their properties might be considered as valuable products to be employed in food, pharmaceutical and cosmetic industries. Vegetable oils, namely canola, soyabean and sunflower seed oils, contain considerable quantities of phytosterols, mainly β–sitosterol. The aim of this research is to determine the effect of refining operations, particularly deodorization on this valuable class...

The transmethylation of methyl-(14)C-methionine and methyl-(14)C-adenosylmethionine into the nonsaponifiable lipids of anaerobically grown yeast during adaptation to aerobic conditions was investigated. The rate and extent of methyl transfer increased with aeration time and was dependent upon the presence of a fermentable carbon source and O(2). Methionine and adenosylmethionine uptake rates in...

In both forest and agricultural soils, plant derived cuticular materials can constitute a significant part of soil organic matter. In this study, the sorption of nonpolar (naphthalene and phenanthrene) and polar (phenol and 1-naphthol) aromatic organic pollutants to aliphatic-rich cuticularfractions of green pepper (Capsicum annuum) (i.e., bulk (PC1), dewaxed (PC2), nonsaponifiable (PC3), nonsa...

Slices from adipose tissue and liver were incubated with uniformly labeled C14-isoleucine and the respiratory carbon dioxide, fatty acids, and nonsaponifiable lipids were isolated and analyzed for radioactivity. Organic acids were qualitatively identified by chromatography and autoradiography. Adipose tissue oxidized isoleucine to carbon dioxide a t a rate greater than that of liver. Conversion...

ROSENTHAL, J., A. ANGEL, AND J. FARKAS. Metabolic fate of leucine: a sign$kant sterol precursor in adipose tissue and muscle. Am. J. Physiol. 226(2) : 411-418. 1974.-The quantitative significance of muscle and adipose tissue as extrahepatic sites of leucine metabolism was studied. The rate of leucine conversion to either CO* or total lipid expressed per gram wet weight of tissue was adipose tis...

The laboratory preparation of 20-methylcholanthrene from desoxycholic acid by Wieland and Dane (20) in 1933 encouraged speculation concerning the role that polynuclear aromatic hydrocarbons might play as endogenous carcinogenic agents, but in the succeeding decade progress in the characterization of endogenous chemical carcinogens has been extremely slow. Several investigators have attempted to...

Phenylmethylsulfonyl fluoride (PMSF), a reagent commonly employed for the inhibition of serine proteases, has been found to cause significant inhibition of the incorporation of labeled acetate, but not mevalonate, into nonsaponifiable lipid and digitonin-precipitable sterols in the 10,000 X g supernatant fraction of rat liver homogenate preparations. In two experiments, the extent of inhibition...

Diethylstilbestrol (DES) was injected in doses ranging from 600 micro g to 0.4 micrograms/kg body weight into mature male rats over a 3 wk period. Profound effects on skin morphology and on sterol content of skin were noted. The sebaceous glands atrophied and the epidermis lost granularity. The concentrations of all skin sterols, with the exception of cholesterol, were reduced. At a dose level ...

The fact that the skin is a major site of total body sterologenesis, coupled both with the apparent absence of low density lipoprotein receptors on keratinocytes and with the lack of influence of serum cholesterol on epidermal sterologenesis, has created the impression that epidermal lipid synthesis might be autonomous, i.e., nonregulatable. Recent studies have shown, however, that disruption o...

Oils and fats are substances that are important nutritionally and have important role and impact on human health. Energy consumption and preservation in respect of food industry and the increase in the world population and search for new sources of oils and fats to full fill the need of the society particulary the nutritional requirements have introduced this research topic. Therefore aim of th...