نتایج جستجو برای Direct dyes

تعداد نتایج: 312696  

Journal: :Sangyo igaku. Japanese journal of industrial health 1990
H Kosaka, S Nakamura,

The umu test system is a newly developed method to evaluate genotoxicities of a wide variety of environmental carcinogens and mutagens (Oda et al., 1985; Nakamura et al., 1987). In the present study, SOS-inducing activity of 142 synthetic dyes was investigated by the umu test using Salmonella typhimurium (TA1535/pSK1002) under the condition of absence and presence of rat liver microsomal fracti...

Journal: :The Journal of neuroscience : the official journal of the Society for Neuroscience 2013
Liam E Browne, Vincent Compan, Laricia Bragg, R Alan North,

P2X receptors are widely distributed in the nervous system, and P2X7 receptors have roles in neuropathic pain and in the release of cytokines from microglia. They are trimeric membrane proteins, which open an integral ion channel when ligated by extracellular ATP. This channel is preferentially permeable to small cations (sodium, potassium, calcium) but also allows permeation of larger cations ...

2014
Niyaz Mohammad Mahmoodi, Jafar Abdi, Dariush Bastani,

The magnetic adsorbent nanoparticle was modified using cationic surface active agent. Zinc ferrite nanoparticle and cetyl trimethylammonium bromide were used as an adsorbent and a surface active agent, respectively. Dye removal ability of the surface modified nanoparticle as an adsorbent was investigated. Direct Green 6 (DG6), Direct Red 31 (DR31) and Direct Red 23 (DR23) were used. The charact...

2016
Sylvine Lalnunhlimi, Veenagayathri Krishnaswamy,

Removal of synthetic dyes is one of the main challenges before releasing the wastes discharged by textile industries. Biodegradation of azo dyes by alkaliphilic bacterial consortium is one of the environmental-friendly methods used for the removal of dyes from textile effluents. Hence, this study presents isolation of a bacterial consortium from soil samples of saline environment and its use fo...

Journal: :Toxicology and applied pharmacology 1978
J F Robens, G S Dill, J M Ward, J R Joiner, R A Griesemer, J F Douglas,

Thirteen-week subchronic toxicity studies of direct blue 6, direct black 38, and direct brown 95 dyes were conducted by administering the test chemicals in feed to Fischer 344 rats and B6C3F1 mice. Groups of 10 rats and 10 mice of each sex were administered one of the three dyes at one of five concentrations for 13 weeks and then necropsied, beginning the second day after the end of the dosing ...

2004
Georgeta Maria SIMU, Sergiu Adrian CHICU, Nicole MORIN, Walter SCHMIDT, Eugen ŞIŞU,

Georgeta Maria SIMU1∗, Sergiu Adrian CHICU , Nicole MORIN, Walter SCHMIDT, Eugen ŞIŞU Institute of Chemistry Timisoara, Romanian Academy, B-dul Mihai Viteazul 24, 300223 Timişoara-ROMANIA e-mail: gsimu@yahoo.com Zoologisches Institut der Universität zu Köln, Weyertal 119, D–50923 Köln-GERMANY Ecole Normale Superieure, Rue Lohmond 24, Paris-FRANCE University of Medicine and Pharmacy Victor Babes...

2012
Seigo Ito,

Following the first report on dye-sensitized solar cells (DSCs) by Prof. Grätzel in 1991, thousands of papers have been published with the aim of making DSCs commercially viable (Fig. 1). They are attractive because of their low-cost materials and convenient fabrication by a non-vacuum, high-speed printing process. One of the key materials in DSCs is the sensitizer dye. Ruthenium-complex dyes a...

Raziyeh Zandipak, Soheil Sobhanardakani,

Background and purpose:The presence of dyes in wastewaters may cause serious problems for the environment because of their high toxicity to aquatic organisms and unfavorable aesthetical impact. In the present study, multi-walled carbon nanotubes (MWCNTs) were used for removal of anionic dyes Direct Blue 106 (DB106) and Acid Green 25 (AG25), from water samples. Materials and Methods:MWCNTs were ...

2015
M. F. Shahin,

The effect of cationic modification of cotton fabrics, using cationic agent (Chromatech 9414) on direct dyeing characteristics was studied in this work. Cationization of cotton fabric at different conditions (pH, cationic agent concentration, temperature and time) was investigated and the optimum conditions were determined . Nitrogen content of cotton samples pretreated with cationic agent was ...

Journal: :Chemical communications 2010
Volker Leen, Verónica Zaragozí Gonzalvo, Wim M Deborggraeve, Noël Boens, Wim Dehaen,

BODIPY dyes are shown to be susceptible to oxidative nucleophilic substitution of the alpha-hydrogens, incorporating nitrogen and carbon nucleophiles in a single, high yielding step. The reaction is an excellent alternative to conventional functionalization of this popular fluorophore.

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