Results 31 to 40 of about 19,110 (124)

Electrochemical investigation of dopamine and hydroquinone by (Pd@Au-PANI) nanocomposite [PDF]

Nanomedicine Journal
Objective(s): Electrochemical estimation of dopamine by synthesized Pd@Au-PANI nanocomposite.Materials and Methods: Au-doped and Au-Pd incorporated PANI nanocomposites were prepared via oxidative polymerization and hydrothermal methods with ammonium ...
Zaid H. Mahmoud, H. N. K. AL-Salman, Maha Khalid Abdulameer, Russul Reidh Abass, Tholfiqar Najah Ismael, Dheyaa Yahaia Alhameedi, Mahmood Hasen shuhata Alubiady, Ahmed Muzahem Al-Ani, Sally Salih Jumaa   +8 more
doaj   +1 more source

Determinação simultânea de ácido kójico e hidroquinona por espectrofotometria visível e calibração multivariada

Química Nova, 2011
A multivariate spectrophotometric method was developed for analysis of kojic acid/hydroquinone associations in skin whitening cosmetics. The method is based on the reaction between kojic acid and Fe3+ and on the reduction of Fe3+ by hydroquinone and ...
Giselle Nathaly Calaça, Sandra Stets, Noemi Nagata   +2 more
doaj   +1 more source

The Effect Hydroquinone Extracted from Sonneratia caseolaris Fruit to Control Vibrio harveyi Artificial Infection on Tiger Shrimp, Penaeus monodon Fab.

Jurnal Akuakultur Indonesia, 2007
The role of hydroquinone extracted from Soneratia caseolaris fruit to control Vibrio harveyi infection on tiger prawn was carried out. In vitro experiment was conducted using disc diffusion and MIC {minimum inhibitory concentration) methods to know the ...
. Arifuddin, . Sukenda, D. Dana
doaj   +1 more source

A Nano˗Sepiolite Clay Electrochemical Sensor for the Rapid Electro–Catalytic Detection of Hydroquinone in Cosmetic Products

Acta Chimica Slovenica, 2018
In this paper, a simple and sensitive electrochemical nano-sensor was developed for the analysis of hydroquinone based on sepiolite clay modified carbon paste sensor by using differential pulse adsorptive stripping voltammetry and square wave adsorptive ...
Sevda Aydar, Dilek Eskiköy Bayraktepe, Hayati Filik, Zehra Yazan   +3 more
doaj   +1 more source

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  

Evaluating the efficacy of Terminalia chebula Retz. 5% cream compared to hydroquinone 2% cream in the treatment of melasma [PDF]

Avicenna Journal of Phytomedicine
Objective: Melasma is a multifactorial, chronic, acquired skin disorder of hyperpigmentation. Terminalia chebula Retz. (T. chebula) has shown antioxidant, anti-inflammatory and tyrosinase enzyme inhibitory activities.
Amir Emad Kheirieh, Fariba Sharififar, Mehdi Ansari Dogaheh, Fatemeh Dabaghzadeh, Simin Shamsi Meymandi, Behnoush Bakhshoudeh   +5 more
doaj   +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

Comparison of antioxidant activity of extract of Green tea to commercial antioxidants in 2% hydroquinone cream

Journal of Medicinal Plants, 2005
Background: Recently, many researchers have been involved in finding means to prevent or delay deterioration by oxidative reactions in cosmetic preparations.
K Morteza-Semnani, M Saeedi, Z Nozadi
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

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