Results 91 to 100 of about 51,626 (253)

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  

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

Review on system and materials requirements for high temperature thermal energy storage. Part 1: General requirements [PDF]

, 2016
High temperature thermal energy storage offers a huge energy saving potential in industrial applications such as solar energy, automotive, heating and cooling, and industrial waste heat recovery. However, certain requirements need to be faced in order to
Cabeza, Luisa F., Gasia, Jaume, Miró, Laia   +2 more
core   +2 more sources

Tunable amylopectin graft copolymers for flocculating and dewatering iron ore tailings

The Canadian Journal of Chemical Engineering, EarlyView.
Abstract Polyacrylamide (PAM), the standard flocculant for mining tailings, often produces turbid supernatants and poorly dewatered sediments, limiting water reuse and tailings densification. We synthesized amylopectin‐graft‐poly[(2‐methacryloyloxy)ethyl]trimethylammonium chloride (AP‐g‐PMETAC) copolymers with systematically varied graft frequency (N = 
Gustavo P. Zago, Reinaldo Giudici, João B. P. Soares   +2 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

Abiotic retention of nitrogen and dissolved organic matter by forest mineral soils [PDF]

, 2006
The effect of NO3- deposition on NH4 +, DON, and DOC retention as well as abiotic NO3 - retention via the hypothesized ferrous wheel mechanism was examined in oxic and anoxic tropical and oxic temperate soils using sorption isotherm experiments ...
Watanabe, Naoko
core   +2 more sources

Following the relaxation dynamics of photoexcited aniline in the 273-266 nm region using time-resolved photoelectron imaging [PDF]

, 2013
Scanning tunnelling microscopy (STM) and Auger electron spectroscopy (AES) have been used to investigate the growth morphology of ultra-thin Pb films on the Ni3Al(111) face at room temperature. A previous study [K. Miśków and A. Krupski Appl Surf Sci 273,
Livingstone, Ruth A., Thompson, James O. F., Townsend, David   +2 more
core   +2 more sources

Spatially Configuring RGO Interlayers With PANI/Lignin Nanoparticles Toward High‐Performance Asymmetric Supercapacitors

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
A novel PLNPs@RGO electrode, self‐assembled from polyaniline/lignin conjugated mesoporous nanoparticles (PLNPs) and reduced graphene oxide, exhibits excellent capacitance and high energy density in supercapacitors. The high‐performance flexible solid‐state asymmetric supercapacitor (FSAC) plays a critical role in advancing the innovation of next ...
Mengya Sun, Weisheng Yang, Yifei Qu, Shengbo Ge, Huiyang Bian, Mashallah Rezakazemi, Hongqi Dai   +6 more
wiley   +1 more source

Evaluation of Steric Effect of Hydroquinone, Tert-Butyl Hydroquinone and 2, 5-Ditert-Butyl Hydroquinone by using a Briggs-Rauscher Oscillator

International Journal of Electrochemical Science, 2018
This article indicated a novel methodology of evaluation of steric effect of (hydroquinone (HQ), tert-Butyl hydroquinone (TBHQ) and 2, 5-ditert-butyl hydroquinone (DTBHQ)) by using a Briggs-Rauscher chemical oscillating system.
Saif Ullah, Waqar Uddin, Gang Hu, Muhammad Yasir Nawabi, Rooh Ullah   +4 more
doaj   +1 more source

The addition of morpholine to unsaturated esters [PDF]

, 1948
Thesis (M.A.)--Boston University, 1948.
Laible, Roy Charles
core   +1 more source