Results 31 to 40 of about 10,171 (209)

Development of an Electrochemical Bioassay Based on the Alkaline Phosphatase Activity of Chlamydomonas reinhardtii to Assess the Toxicity of Heavy Metals

open access: yesInternational Journal of Electrochemical Science, 2016
A novel electrochemical bioassay for the rapid and sensitive evaluation of heavy metals toxicity was developed using the alkaline phosphatase activity of Chlamydomonas reinhardtii (C. reinhardtii).
Haitao Jiang   +7 more
doaj   +1 more source

Nickel on Oxidatively Modified Carbon as a Promising Cost-Efficient Catalyst for Reduction of P-Nitrophenol

open access: yesMolecules, 2022
The reduction of p-nitrophenol to p-aminophenol has become a benchmark reaction for testing the efficiency of new catalytic systems. In this study, we use oxidatively modified carbon (OMC) as a structural support to develop a new cost-efficient nickel ...
Shamil Galyaltdinov   +4 more
doaj   +1 more source

Advances in selective hydrogenation of nitrobenzene toward p-aminophenol

open access: yesSustainable Chemistry for Climate Action
p-Aminophenol is an important intermediate for dyestuff, medical and rubber. Selective hydrogenation of nitrobenzene is a green and environmentally friendly preparation process for the p-aminophenol synthesis.
Jinzhi Lu, Hao Wang, Xiao Cai, Yan Zhu
doaj   +1 more source

Synthesis of New Azo Compounds Based on N-(4-Hydroxypheneyl)maleimide and N-(4-Methylpheneyl)maleimide

open access: yesMolecules, 2010
Maleic anhydride was reacted with p-aminophenol and p-toluidine in the presence of di-phosphorus pentoxide (P2O5) as a catalyst to produce two compounds: N-(4-hydroxy-phenyl)maleimide (I) and N-(4-methylphenyl)maleimide (II). The new azo compounds I(a-c)
Issam Ahmed Mohammed, Asniza Mustapha
doaj   +1 more source

Spectrophotometric Determination of Some Phenolic Compounds Using N,N- diethyl –p-phenylenediamine (DE – PPD) and Benzoyl peroxide [PDF]

open access: yesمجلة التربية والعلم, 2013
A rapid and sensitive spectrophotometric method has been developed for the determination of some phenolic compounds (phenol, o-aminophenol and α-naphthol) and was applied for determination of amoxicillin drug.
Elham S. Salih   +2 more
doaj   +1 more source

An Update on Airborne Contact Dermatitis: 2001-2006 [PDF]

open access: yes, 2007
Reports on airborne dermatoses are mainly published in the context of occupational settings. Hence, in recent years, dermatologists and also occupational physicians have become increasingly aware of the airborne source of contact dermatitis, resulting ...
Goossens, A, Santos, R
core   +1 more source

Simple and rapid hydrogenation of p-nitrophenol with aqueous formic acid in catalytic flow reactors

open access: yesBeilstein Journal of Organic Chemistry, 2013
The inner surface of a metallic tube (i.d. 0.5 mm) was coated with a palladium (Pd)-based thin metallic layer by flow electroless plating. Simultaneous plating of Pd and silver (Ag) from their electroless-plating solution produced a mixed distributed ...
Rahat Javaid   +3 more
doaj   +1 more source

Synergistic effects of micro/nano modifications on electrodes for microfluidic electrochemical ELISA [PDF]

open access: yes, 2011
Microfluidic electrochemical sensing has been considered to be highly efficient. However, we showed, by using numerical simulations in this study, that a planar electrode formed on the bottom of a microchannel is exposed to only a small fraction of ...
Anada Takahisa   +7 more
core   +1 more source

Photoluminescence as a Valuable Tool in the Optical Characterization of Acetaminophen and the Monitoring of Its Photodegradation Reactions

open access: yesMolecules, 2020
In this work, new evidence for the photodegradation reactions of acetaminophen (AC) is reported by photoluminescence (PL), Raman scattering and FTIR spectroscopy.
Monica Daescu   +5 more
doaj   +1 more source

Automated analysis of oxidative metabolites [PDF]

open access: yes, 1974
An automated system for the study of drug metabolism is described. The system monitors the oxidative metabolites of aromatic amines and of compounds which produce formaldehyde on oxidative dealkylation.
Furner, R. L.
core   +1 more source

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