References: Lecithin
Z Naturforsch [C]. 1995 Jul-Aug;50(7-8):561-4.
Antioxidant protection of egg lecithin liposomes during sonication.
Gabrielska J, Sarapuk J, Przestalski S.
Department of Physics and Biophysics, Agricultural University, Wroclaw, Poland.
When model membranes are prepared by ultrasonic treatment of polyunsaturated phospholipids, radical production can induce a partial degradation of the polyunsaturated fatty acyl chains and the formation of lipid hydroperoxides. A suitable antioxidant employed during liposome preparation is able to protect them against lipid peroxidation. This work contains the results of studies on egg lecithin liposomes with incorporated antioxidants that were supposed to play the protective role mentioned. As it has been shown the antioxidant compounds used ensured a 40-60%, i.e., satisfactory protection of liposomes after 30 min sonication. Possible practical applications are discussed.
Laxative online source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7546044&dopt=Abstract lecithin
Biol Reprod. 1995 Feb;52(2):356-64.
Retinol processing by the peritubular cell from rat testis.
Davis JT, Ong DE.
Department of Biochemistry, Vanderbilt University, Nashville, Tennessee 37232, USA.
The cells that surround and support the seminiferous epithelium of the tubules in the testis, i.e., the peritubular or myoid cells, are known to contain relatively high amounts of cellular retinol-binding protein (CRBP). This suggests that they may play an important role in the movement or metabolism of retinol (vitamin A alcohol), which is required for the maintenance of spermatogenesis. Peritubular cells in culture, isolated from the testes of the 20-day-old rat, maintained high levels of CRBP and had the ability to internalize retinol from retinol-binding protein (RBP), the blood transport protein for retinol, in a manner suggesting a receptor-mediated process. Little of the internalized retinol was esterified, in contrast to what occurs in other cell types that contain high amounts of CRBPs, and very little, if any, lecithin-retinol acyltransferase activity was present in microsomes obtained from the cultured cells. The cells did, however, have the ability to synthesize and release their own RBP to the medium. This suggests that retinol from the blood may actually reach the seminiferous epithelium by passing across the peritubular cell, released on a new molecule of RBP, rather than by entering into the tubule bound to the preexisting RBP present in the interstitial fluid.
Laxative online source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7711204&dopt=Abstract lecithin
affrc.go.jp
The effects of co-ingested lipids and emulsifiers on the accumulation of quercetin metabolites in blood plasma after the short-term ingestion of onion by rats were investigated. Plasma extracts of rats that had been fed onion-containing diets for one and two weeks were analyzed by HPLC with electrochemical detection after a treatment with sulfatase/beta-glucuronidase. Almost all of the quercetin metabolites in the plasma were sulfate/glucuronide conjugates of quercetin and isorhamnetin. More than 4.6% (w/w) of soybean oil in the diets significantly enhanced the accumulation of quercetin metabolites in the plasma. Fish oil and beef tallow increased this to an extent similar to that with soybean oil, and lecithin was more effective than the other three lipids. Two emulsifiers, sodium caseinate and sucrose fatty acid ester, also showed an enhancing effect on the accumulation of quercetin metabolites. These results indicate that co-ingested lipids and emulsifiers could enhance the bioavailability of quercetin glucosides in onion.
Laxative online source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=14730132&dopt=Abstract lecithin [PubMed - in process]
Lecithin online literature
Buy Rx Online || Hair Million herbal formula for hair loss and hair growth || Hair Million, excellent herbal formula, wards off hair loss and promotes hair growth || Buy Tramadol || Dream Pharmaceuticals Online Pharmacy: Buy Rx Online || Lecithin product online guide ||