Results 61 to 70 of about 19,766 (199)

Determination of Hydroquinone in a Square Wave Voltammetry based on Screen Printed Carbon Electrode

Journal of Pure and Applied Chemistry Research, 2015
Hydroquinone is a phenolic compound are often used extensively in the cosmetics industry as whitening agent. This compound is very toxic and their use should be monitored.
Alfita Safitri, Ani Mulyasuryani, Rachmat Triandi T   +2 more
doaj  

A Screen Printed Graphene Based Electrochemical Sensor for Single Drop Analysis of Hydroquinone in Cosmetic Products

International Journal of Electrochemical Science, 2019
A graphene modified carbon paste sensor (or so-called graphene based sensor) was developed for electrochemical detection of hydroquinone. The sensor was fast fabricated using screen-printing technique.
Wannida Duekhuntod, Chanpen Karuwan, Adisorn Tuantranont, Duangjai Nacapricha, Saowapak Teerasong   +4 more
doaj   +1 more source

Mapping structure–property relationships in a 6‐oxo‐verdazyl radical by variable pressure crystallography and density functional theory

Acta Crystallographica Section B, EarlyView.
For the first time, the structural response to pressure of a verdazyl radical crystal has been studied. Computational modelling revealed changes in electronic and magnetic properties as a result of a structural phase transition.The response of the 1,5‐tolyl‐3‐phenyl‐6‐oxo‐verdazyl radical (pTolOV) to pressure in the crystalline state has been ...
James R. Brookes, Varshini J. Kumar, Isabelle M. Jones, Aston M. Summers, Stephanie A. Bird, Paul J. Low, Stephen A. Moggach, Dino Spagnoli   +7 more
wiley   +1 more source

Preparation of activated carbon from date stones as a catalyst to the reactivity of hydroquinone: Application in skin whitening cosmetics samples

Journal of Science: Advanced Materials and Devices, 2019
In this study, the authors report on the use of the date stones as a raw material for the production of activated carbon (AC) using the physical activation.
H. Hammani, F. Laghrib, A. Farahi, S. Lahrich, T. El Ouafy, A. Aboulkas, K. El Harfi, M.A. El Mhammedi   +7 more
doaj   +1 more source

Novel Histopathologic Features of Diffuse Blue‐Gray Hyperpigmentation Associated With Kratom Use: A Case Report and Literature Review

Journal of Cutaneous Pathology, EarlyView.
ABSTRACT Background Drug‐induced hyperpigmentation accounts for 10%–20% of acquired pigmentary disorders and can be misdiagnosed for other causes such as melasma, post inflammatory changes, or heavy metal deposition. Kratom (Mitragyna speciosa), a Southeast Asian plant with an opioid‐like profile, has been increasingly used in the United States for ...
Rita Kamoua, Kristen Paradine, Craig A. Rohan, Mary McDaniel, Diane Perkins   +4 more
wiley   +1 more source

Comparison between the efficacy of cysteamine cream and combined hydroquinone cream in the treatment of melasma using skin analytical systems: An open-label quasi-randomized controlled trial in Asia patients

Dermatologica Sinica
Background: The mainstay of treatment for melasma is topical hydroquinone or preparations containing hydroquinone. In recent years, cysteamine cream has gained popularity in the treatment of hyperpigmentation disorders.
Andy Deng-Chi Chuang, Erh-Ti Lin, Chang-Cheng Chang, Yung-Hsueh Huang, Meng-En Lu, Chun-Fang Chuang, Hsiu-Mei Chiang   +6 more
doaj   +1 more source

Tyrosine residues at the substrate binding site in human NQO1 homodimer: Protein conformational dynamics and optimization of substrate binding geometry

The FEBS Journal, EarlyView.
Human NAD(P)H:quinone oxidoreductase 1 is a homodimeric flavoenzyme crucial for redox metabolism and linked to significant health issues. Point mutations at Tyr126 and Tyr128 demonstrate their essential roles in optimizing substrate binding geometry for catalysis, as well as in half‐site reactivity and conformational dynamics during the enzyme's ...
Maribel Rivero, Juan Luis Pacheco‐Garcia, Pavla Vankova, Dmitry Loginov, Isabel Quereda‐Moraleda, Jose Manuel Martin‐Garcia, Petr Man, Angel Luis Pey, Milagros Medina   +8 more
wiley   +1 more source

Real‐world evidence for the efficacy and tolerability of an isobutylamido‐thiazolyl‐resorcinol (Thiamidol)‐containing skincare regimen on facial hyperpigmentation and overall skin appearance: A multi‐centre study in 11 European countries

International Journal of Cosmetic Science, EarlyView.
A Thiamidol‐containing skincare regimen showed significant improvement in facial hyperpigmentation in a real‐world study across 11 European countries. The treatment led to a significant reduction in mMASI scores, enhanced overall skin condition and demonstrated high tolerability.
B. Schuster, T. Rogers, C. Vendruscolo, D. Roggenkamp, W. G. Philipp‐Dormston, F. Al‐Niaimi, S. Roussel, N. Kiss, H. Malik, D. Grozeva, K. S. Berger, C. Rauscher, L. Kolbe   +12 more
wiley   +1 more source

Current clinical use of depigmenting agents

Dermatologica Sinica, 2014
A variety of topical depigmenting agents have been used clinically, with varying degrees of success. To date, the most effective topical treatment is a triple-combination agent containing hydroquinone (HQ), tretinoin, and fluocinolone acetonide. However,
Jung Won Shin, Kyoung Chan Park
doaj   +1 more source

The Harmful Trifecta of Skincare in African and Asian Populations: Triple Action Creams, Skin‐Lightening Creams, and Antiseptic Soaps

JEADV Clinical Practice, EarlyView.
Olufolakemi Cole‐Adeife, Monisha Madhumita, Doreen Mapunda, Daudi Mavura, Fatimata Ly   +4 more
wiley   +1 more source