lecithin/dental caries

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Deletion of specific glycan chains affects differentially the stability, local structures, and activity of lecithin-cholesterol acyltransferase.

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The enzymatic and interfacial binding activity of lecithin-cholesterol acyltransferase (LCAT) is affected differentially by the location and extent of its glycosylation. Two LCAT glycosylation-deficient mutants, N84Q and N384Q, were constructed, permanently expressed in Chinese hamster ovary cells,

Reaction of lecithin: cholesterol acyltransferase with a water soluble substrate: effects of surfactants.

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The reaction of fatty acid esters of p-nitrophenol, including the butyrate ester (PNPB) with lecithin: cholesterol acyltransferase (LCAT) has already been described (Bonelli, F.S. and Jonas, A. (1989) J. Biol. Chem. 264, 14723-14728) as a means to investigate the events at the active site of LCAT in

Reaction of lecithin cholesterol acyltransferase with water-soluble substrates.

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To separate the interfacial and catalytic reactions of lecithin cholesterol acyltransferase (LCAT), we carried out the first investigation of its reaction with water-soluble substrates. We used a continuous spectrophotometric assay for the hydrolysis of p-nitrophenyl esters of fatty acids to

The site of amniocentesis and the lecithin-sphingomyelin ratio.

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Simultaneous sampling of amniotic fluid from two sites within the amniotic cavity proximal and distal to the fetal mouth was performed. The lecithin-sphingomyelin (L/S) ratio of amniotic fluid obtained close to the fetal mouth was usually higher than that of amniotic fluid obtained from a site

Comparison of physical models used to explain condensation effects in lecithin-cholesterol mixed films.

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The apparent condensation effect observed with mixed monolayers of lecithin and cholesterol has been examined with respect to both molecular interaction and molecular cavity models. For each, model equations are presented which predict the surface areas of the film components as a function of the

Influence of calcium, cholesterol, and unsaturation on lecithin monolayers.

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Surface pressures and potentials of mixed monolayers of dicetyl phosphate-cholesterol, dipalmitoyl lecithin-cholesterol, egg lecithin-cholesterol, and phosphatidic acid-cholesterol were measured. The surface potential is shown to be a more reliable parameter for the study of interactions in

In vivo uptake of lecithin-coated polystyrene beads by rat hepatocytes and sinusoidal endothelial cells.

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BACKGROUND While phagocytosis by Kupffer cells (stellate perisinusoidal macrophages) is well known and that by endothelial cells also is thought to occur under certain conditions, the uptake of large particles by hepatocytes has not been well studied. We reported previously the selective phagocytic

[Clinical research of chronic pelvic cavity pain syndrome treated with acupoint catgut embedding therapy].

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OBJECTIVE To explore the clinical efficacy of acupoint catgut embedding therapy on chronic pelvic cavity pain syndrome differentiated as kidney deficiency and stagnation of damp heat, and explore the impacts on plasma P substance (SP), plasma beta-endorphin (β-EP). METHODS One hundred and eighty

Lecithin-based emulsions for potential use as saliva substitutes in patients with xerostomia--viscoelastic properties.

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The purpose of the present study was to investigate lecithin-rice bran oil rheological properties with the view to consider these as potential saliva substitutes in patients with severe xerostomia and salivary hypofunction. Pseudo-ternary phase diagrams of rice bran oil, lecithin and water mixtures

Thymus essential oil extraction, characterization and incorporation in phospholipid vesicles for the antioxidant/antibacterial treatment of oral cavity diseases.

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The aim of the work was to extract, characterize, and formulate Thymus capitatus (Tymbra capitata) essential oil in phospholipid vesicles: liposomes, glycerosomes and Penetration Enhancer-containing Vesicles (PEVs). The steam-distilled essential oil was mainly composed of carvacrol. The oil was

Azethoxyl nitroxide spin labels. ESR studies involving thiourea crystals, model membrane systems and chromatophores, and chemical reduction with ascorbate and dithiothreitol.

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Trans- and cis-azethoxyl nitroxides 1, 2, 3 and 4 can be trapped in the cavities of thiourea crystals. The presence of a single gauche conformation on either side of the pyrrolidine ring within the crystals was indicated by the ESR spectra. Rotation about the long molecular axis then corresponds

Chlorhexidine markedly potentiates the oxidants scavenging abilities of Candida albicans.

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The oxidant scavenging ability (OSA) of catalase-rich Candida albicans is markedly enhanced by chlorhexidine digluconate (CHX), polymyxin B, the bile salt ursodeoxycholate and by lysophosphatidylcholine, which all act as detergents facilitating the penetration of oxidants and their intracellular

Probing a membrane matrix regulating hormone action: I. The molecular length of effective lipids.

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Auxin-induced pea (Pisum sativum) stem section elongation is enhanced at levels of 3 to 40 micromolar by six new classes of alkane derivatives additional to those described earlier, providing that length of their molecules exceeds 20 A. Increasingly longer homologous series of alkyl chlorides,

Effect of cholesterol in suspension on the incorporation of phosphate into phospholipid by macrophages in vitro.

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Macrophages obtained from the peritoneal cavity of rabbits were incubated with phosphate-(32)P in order to investigate the synthesis of phospholipid by these cells. After 6 hr of incubation 0.25% of the phosphate added to the medium had been incorporated into phospholipid by the macrophages, mainly

Eosinophilia and mast cell hyperplasia induced by parasite phospholipid.

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Phospholipid preparations from the nematode Ascaris suum or cysts of Echinococcus granulosus (hydatid cysts) induced an eosinophilia when injected into the peritoneal cavity of rats. Peritoneal eosinophilia persisted throughout 21 days of daily injections of Ascaris lipid and was accompanied by

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