Results 211 to 220 of about 42,982 (263)
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International Journal of Toxicology, 2023
The Expert Panel for Cosmetic Ingredient Safety reviewed newly available studies since their original assessment in year 2000, along with updated information regarding product types and concentrations of use, and confirmed that PEG-5, -10, -16, -25, -30, and -40 Soy Sterol are safe as cosmetic ingredients in the practices of use and concentration as ...
Priya, Cherian +12 more
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The Expert Panel for Cosmetic Ingredient Safety reviewed newly available studies since their original assessment in year 2000, along with updated information regarding product types and concentrations of use, and confirmed that PEG-5, -10, -16, -25, -30, and -40 Soy Sterol are safe as cosmetic ingredients in the practices of use and concentration as ...
Priya, Cherian +12 more
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Phase transitions of sterols and sterol—lecithin sterol—lecithin mixtures
Chemistry and Physics of Lipids, 1976Abstract Sterols exhibit reversible htermal transitions below their melting points which are dependent on the state of hydration and on the structure of the aliphatic substituent at C 17 . The endotherm exhibited by cholesterol can be abolished by mixing with hydrated phospholipids at molar ratios below 1 : 1 but reappears in a metastable form at ...
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Mutagenic sterol hydroperoxides
Mutation Research/Fundamental and Molecular Mechanisms of Mutagenesis, 1986Sterol hydroperoxides 3 beta-hydroxy-5 alpha-cholest-6-ene-5-hydroperoxide and 3 beta-hydroxycholest-5-ene-7 alpha-hydroperoxide show weak dose-response direct mutagenicity towards Salmonella typhimurium strain TA 1537 in a liquid medium incubation bioassay.
L L, Smith, V B, Smart, N, Made Gowda
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Inhibition of sterol biosynthesis by 14α-hydroxymethyl sterols
Biochemical and Biophysical Research Communications, 1978Abstract 14α-Hydroxymethyl-5α-cholest-7-en-3β-ol (I) and 14α-hydroxymethyl-5α-cholest-6-en-3β-ol (II) have been prepared by chemical synthesis from 3β-acetoxy-7α,32-epoxy-14α-methyl-5α-cholestane. Compound I, previously shown to be efficiently convertible to cholesterol upon incubation with rat liver homogenate preparations, has been found to be a ...
Schroepfer, G J +3 more
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Lipids, 1994
AbstractThe oyster cannot synthesize sterols from smaller molecules but must obtain them from its diet, which consists of detritus and small organisms, i.e., mostly single‐celled algae. Algae differ widely in their effectiveness as oyster food. Small (<5 μm) algae which are abundant in sterols and polyunsaturated fatty acids appear to be most ...
G W, Patterson +5 more
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AbstractThe oyster cannot synthesize sterols from smaller molecules but must obtain them from its diet, which consists of detritus and small organisms, i.e., mostly single‐celled algae. Algae differ widely in their effectiveness as oyster food. Small (<5 μm) algae which are abundant in sterols and polyunsaturated fatty acids appear to be most ...
G W, Patterson +5 more
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Comparative Biochemistry and Physiology, 1968
Abstract 1. 1. Fucosterol, 24-methylene cholesterol, cholesterol, saringosterol and, tentatively, desmosterol were identified in Laminaria faeroensis and L. digitata . 2. 2. Wtith the exception of choleserol, which is quantitatively a minor sterol, all the sterols were unsaturated in the side-chain. 3. 3.
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Abstract 1. 1. Fucosterol, 24-methylene cholesterol, cholesterol, saringosterol and, tentatively, desmosterol were identified in Laminaria faeroensis and L. digitata . 2. 2. Wtith the exception of choleserol, which is quantitatively a minor sterol, all the sterols were unsaturated in the side-chain. 3. 3.
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Intracellular sterol trafficking
Experientia, 1990Sterols are acquired by cells either biosynthetically by the interaction of cytoplasmic and endoplasmic reticulum elements, or by endocytosis. The subcellular distribution of sterols, however, argues that sterols are trafficked quickly from sites of acquisition to target membranes, particularly the plasma membrane.
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1965
Publisher Summary This chapter provides an overview of brain sterol metabolism. Histochemical, cytochemical, developmental, and biochemical studies indicate that much of the brain cholesterol is localized in the lipid–protein layers of the myelin sheath.
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Publisher Summary This chapter provides an overview of brain sterol metabolism. Histochemical, cytochemical, developmental, and biochemical studies indicate that much of the brain cholesterol is localized in the lipid–protein layers of the myelin sheath.
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Applied Microbiology and Biotechnology, 2003
Sterols are vital components of all eukaryotic cells. This review describes the variety of sterol structures found in microalgae, yeasts, fungi, protozoans and microheterotrophs. Reports of the occurrence of sterols in prokaryotic cells are critically assessed.
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Sterols are vital components of all eukaryotic cells. This review describes the variety of sterol structures found in microalgae, yeasts, fungi, protozoans and microheterotrophs. Reports of the occurrence of sterols in prokaryotic cells are critically assessed.
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