نتایج جستجو برای: azo azomethine

تعداد نتایج: 5221  

2010

This study makes a comparison between Fenton, Fenton-like, photo-Fenton and photo-Fenton-like treatment methods to investigate the removal of two acid dyes. The two selected acid dyes are C.I. Acid Orange 8 (AO8) and C.I. Acid Red 17 (AR17). These were chosen as model organic contaminants. The effect of operating parameters, such as amount of Fenton’s reagent (H2O2 and Fe) and Fenton’s-like rea...

2016

Azo dyes represent the world’s largest and most diverse group of synthetic dyes with uses spanning almost every industry (Pandey et al. 2007). Their significance to public health is great as these globally produced dyes have been proven to be carcinogenic upon biodegrading into their aromatic amines (Harmse 2013). But aside from their carcinogenic properties, azo dyes have another dangerous eff...

2017
Joseph Tsemeugne Emmanuel Sopbué Fondjo Jean-de-Dieu Tamokou Ignas Tonle Irene Chinda Kengne Arnaud Djintchui Ngongang Stephen Tamekou Lacmata Taoufik Rohand Jules Roger Kuiate Beibam Luc Sondengam

BACKGROUND A series of recently reported phenolic azo dyes 7a-e were prepared by coupling the thienyl diazonium sulfate of 3-Amino-4H-benzo[f]thieno[3,4-c](2H)chromen-4-one with selected diversely substituted phenolic and naphtholic derivatives. These compounds were evaluated for their antibacterial and antifungal activities. Furthermore their voltammetric behavior was compared at a glassy carb...

Journal: :Journal of physics 2021

Abstract The preparation 0f azo dyes is the subject of this research. 4-hydroxycoumarin with each ofo-amino benzoic acid (3-[o-Amino acidazo]-4-hydroxycoumarin]) (B 1 ) and Sulfa guanidine (3-[Sulfa azo]-4-hydroxycoumarin) 2 were syntheses. Azo compounds characterized by I.R, CHN, H-NMR Elctronic Mass spectroscopy. At various pH levels, electronic spectra these investigated in terms acid-base p...

Journal: :Chemical communications 2014
Shujuan Zhang Yan Peng Wei Jiang Xitong Liu Xiaojie Song Bingcai Pan Han-Qing Yu

Photo-induced reversible sorption of azo dyes on titania xerogels is observed, which is based on the photo-switchable change of the acetylacetonato anchors in the xerogels. The photoisomerization of azo compounds that regulates many gate-keeper-like host-guest interaction systems is excluded as the determinant.

Journal: :The Journal of the Society of Chemical Industry, Japan 1954

Journal: :Nanoscale 2015
Carmen Stoffelen Jurriaan Huskens

Supramolecular nanoparticles (SNPs) are of high interest in both nanoscience and molecular diagnostics and therapeutics, because of their reversible and designable properties. To ensure colloidal stabilization and biocompatibility, most reported strategies require the use of hydrophilic long-chain polymers such as poly(ethylene glycol). Here, we show the formation of zwitterionic supramolecular...

2007
Herbert Silverstone

Variations in the composition of the diet influence the rate of appearance of liver tumors in rats fed certain azo dyes. The effective dietary factors and possible mechanisms involved have been reviewed by Rusch, Baumann, Miller, and Kline (14); as yet no generally accepted explanation has been advanced either for the mode of carcinogenic action or for the means by which diet affects it. It has...

2017
Rihui Yao Zeke Zheng Yong Zeng Xianzhe Liu Honglong Ning Shiben Hu Ruiqiang Tao Jianqiu Chen Wei Cai Miao Xu Lei Wang Linfeng Lan Junbiao Peng

Bottom-gate all-aluminum thin film transistors with multi conductor/insulator nanometer heterojunction were investigated in this article. Alumina (Al₂O₃) insulating layer was deposited on the surface of aluminum doping zinc oxide (AZO) conductive layer, as one AZO/Al₂O₃ heterojunction unit. The measurements of transmittance electronic microscopy (TEM) and X-ray reflectivity (XRR) revealed the s...

2007

Variations in the composition of the diet influence the rate of appearance of liver tumors in rats fed certain azo dyes. The effective dietary factors and possible mechanisms involved have been reviewed by Rusch, Baumann, Miller, and Kline (14); as yet no generally accepted explanation has been advanced either for the mode of carcinogenic action or for the means by which diet affects it. It has...

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