نتایج جستجو برای: arbutin
تعداد نتایج: 341 فیلتر نتایج به سال:
A UPLC-MS/MS method was developed for simultaneous determination of 7 whitening ingredients: nicotinamide, kojic acid, Tranexamic raspberry glycoside, azelaic magnesium ascorbate phosphate and β-Arbutin in cosmetics. The active components were extracted from cosmetics by supersonic extraction with sodium chloride dichloromethane to disperse the sample, 0.015 mol/L potassium dihydrogen solution ...
Two new monocyclic monoterpenoid glycosides, rel-(1R,2S,3R,4R) p-menthane-1,2,3-triol 3-O-β-D-glucopyranoside (1) and rel- (1S,2R,3S) terpinolene-1,2,3-triol 3-O-β-D-glucopyranoside (2) were isolated from aqueous acetone extract of the aerial parts of Mentha haplocalyx Briq.. Their structures were elucidated through spectral analysis using MS and NMR spectrometers.
Robert H. Eckel, MD; Scott M. Grundy, MD, PhD; Lawrence J. Appel, MD, MPH; Tim Byers, MD; Hannia Campos, PhD; Greg Cooney, PhD; Margo A. Denke, MD; Barbara V. Howard, PhD; Eileen Kennedy, DSc; Ronald M. Krauss, MD; Penny Kris-Etherton, PhD; Alice H. Lichtenstein, DSc; Peter Marckmann, MD, DSc; Thomas A. Pearson, MD, PhD; Gabriele Riccardi, MD; Lawrence L. Rudel, PhD; Mike Rudrum, PhD; Frank Sac...
In this study, the inhibitory effect of corn silk on melanin production was evaluated. This study was performed to investigate the inhibitory effect of corn silk on melanin production in Melan-A cells by measuring melanin production and protein expression. The corn silk extract applied on Melan-A cells at a concentration of 100 ppm decreased melanin production by 37.2% without cytotoxicity. Thi...
Stenoloma chusanum is a traditional Chinese medicinal herb with a very high total flavonoid content (TFC). The seasonal dynamics of the TFC and total phenolic content (TPC) in S. chusanum, as well as antioxidant activity, were investigated. The TFC and TPC showed clear seasonal dynamics, reaching their maxima (24.63 ± 1.34% and 9.58 ± 0.41%, respectively) in February. The TFC and TPC in the aer...
BACKGROUND The phytochemical analysis of Stachys alopecuros subsp. divulsa, an endemic Italian species, has been recently reported and has showed the presence of 8-O-acetylharpagide (2), harpagide (3), allobetonicoside (4), and 4¢-O-galactopyranosyl-teuhircoside (5). In this paper, an in deep study of its glycosidic fraction with the aim to widen the knowledge on its secondary metabolites conte...
Currently, aloesin is used in the cosmetic industry as a whitening agent because it inhibits tyrosinase activity. Aloesin is a C-glycosylated chromone compound isolated from aloe, and it is difficult to synthesize because of C-glycosyl moiety in the molecule. The purpose of this study is to search for a new chromone compound which is easy to synthesize and which posesses stronger tyrosinase inh...
The genes for cellobiose utilization are normally cryptic in Escherichia coli. The cellobiose system was used as a model to understand the process by which silent genes are maintained in microbial populations. Previously reported was (1) the isolation of a mutant strain that expresses the cellobiose-utilization (Cel) genes and (2) that expression of those genes allows utilization of three beta-...
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