Results 171 to 180 of about 9,106 (219)

Screening of high α-arbutin producing strains and production of α-arbutin by fermentation

World Journal of Microbiology and Biotechnology, 2013
A mutant Xanthomonas maltophilia BT-112 with high α-anomer-selective glycosylation activity was screened by a series of mutation methods including UV light, N-methyl-N-nitro-N-nitroso-guanidine treatment and quick neutron mutation. The α-arbutin titer increased 15-folds compared with the parent strain.
Chun-Qiao, Liu, Li, Deng, Peng, Zhang, Shu-Rong, Zhang, Luo, Liu, Tao, Xu, Fang, Wang, Tian-Wei, Tan   +7 more
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The oxidation of arbutin by isolated chloroplasts of arbutin-containing plants

Phytochemistry, 1963
Abstract A new explanation is proposed to explain the blackening of Pyrus leaves. The phenolic glucoside arbutin present in the leaves is oxidized directly by enzymes in the chloroplasts, but not present in chromoplasts, leucoplasts or cytoplasm.
Shizuo Hattori, Mitsuhiko Satô
openaire   +1 more source

Biotechnological production of arbutins (α- and β-arbutins), skin-lightening agents, and their derivatives

Applied Microbiology and Biotechnology, 2012
Arbutins (α- and β-arbutins) are glycosylated hydroquinones that are commercially used in the cosmetic industry. These compounds have an inhibitory function against tyrosinase, a critical enzyme for generating pigments, which leads to the prevention of melanin formation, resulting in a whitening effect on the skin.
Dong-Ho, Seo, Jong-Hyun, Jung, Jae-Eun, Lee, Eun-Jung, Jeon, Wooki, Kim, Cheon-Seok, Park   +5 more
openaire   +2 more sources

Radioprotective Mechanisms of Arbutin: A Systematic Review

Current Drug Research Reviews, 2022
Purpose: Efforts to produce radioprotective agents of high potential are appropriate strategies for overcoming possible IR toxicity in organisms. The present research aims to evaluate the signaling pathways and mechanisms through which arbutin exerts radioprotective effects on organisms.
Shima, Sadeghinezhad, Ehsan, Khodamoradi, Loghman, Diojan, Shahram, Taeb, Masoud, Najafi   +4 more
openaire   +2 more sources

Arbutin in marjoram and oregano

Food Chemistry, 2010
Abstract Arbutin is a hydroquinone derivative that has been found in species of several plant families. Within the genus Origanum the formation of arbutin is polymorphic, with arbutin present in considerable amounts ( O. dubium 20.8 ± 15.3 mg/g; wild O. majorana 51.3 ± 15.4 mg/g, cultivated O.
Brigitte Lukas, Corinna Schmiderer, Ulrike Mitteregger, Johannes Novak   +3 more
openaire   +1 more source

Bacterial deconjugation of Arbutin by Escherichia coli

Phytomedicine, 2003
Cystinol akut containing arbutin was developed as an antiseptic since it liberates hydroquinone in the urine. The in vivo release of hydroquinone from arbutin with or without addition of glusulase or an E. coli suspension was investigated in 4 volunteers.
Claudia, Siegers, Cornelia, Bodinet, Sawar Syed, Ali, Claus-Peter, Siegers   +3 more
openaire   +2 more sources

Structural criteria for depigmenting mechanism of arbutin

Phytotherapy Research, 2004
AbstractArbutin, hydroquinone‐O‐β‐d‐glucopyranoside (1) was found to inhibit the oxidation of l‐tyrosine (monophenolase activity) catalyzed by mushroom tyrosinase. However, arbutin itself was oxidized as a monophenol substrate at an extremely slow rate, and this oxidation was accelerated as soon as catalytic amounts (0.01 mm) of l‐3,4 ...
Ikuyo, Hori, Ken-ichi, Nihei, Isao, Kubo
openaire   +2 more sources

The thermal decomposition of arbutin

Thermochimica Acta, 1981
Abstract The thermal decomposition of arbutin starts at the melting at 200°C and terminates at 288°C. Non-volatile decomposition products are mainly hydroquinone(Hq), 1,6-anhydro-β-D-glucopyranose(16AGP), 1,6-anhydro-β-D-glucofuranose(16AGF) and α- and β-D-glucose. In order to elucidate the kinetics, the methods of Friedman and Ozawa are applied for
Yoshiyasu Tanaka, Tadashi Nakamura
openaire   +1 more source

Arbutin determination in medicinal plants and creams

International Journal of Cosmetic Science, 2009
SynopsisA simple flow injection (FI) manifold with spectrophotometric detection was fabricated and tested for arbutin determination. It is based on the measurement of a red‐coloured product at 514 nm formed by the complexation reaction between arbutin and 4‐aminoantipyrine (4‐AP) in the presence of hexacyanoferrate (III) in an alkaline medium.
W, Thongchai, B, Liawruangrath, S, Liawruangrath   +2 more
openaire   +2 more sources

Opinion on the safety of alpha-arbutin and beta-arbutin in cosmetic products

OPINION on the safety of alpha-arbutin and beta-arbutin in cosmetic productsU. Bernauer, L. Bodin, Q. Chaudhry, P.J. Coenraads, M. Dusinska, J. Ezendam, E. Gaffet, C. L. Galli, E. Panteri, V. Rogiers, Ch. Rousselle, M. Stepnik, T. Vanhaecke, S. Wijnhoven, N. Cabaton, A. Koutsodimou, W. Uter, N.
Gaffet, Eric, Bernauer, U., Bodin, L., Chaudhry, Q., Coenraads, P.J., Dusinska, M., Ezendam, J., Gaffet, E., Galli, C. L., Panteri, E., Rogiers, V., Rousselle, Ch., Stepnik, M., Vanhaecke, T., Wijnhoven, S., Cabaton, N., Koutsodimou, A., Uter, W., Goetz, N. Von   +18 more
openaire   +2 more sources