Results 81 to 90 of about 11,124,318 (249)

Rapid spectrophotometric determination of Dopamine Hydrochloride with Chloramine - T

, 1998
A rapid, sensitive and simple spectrophotometric method is developed for the determination of dopamine hydrochloride (DPH) using sodium salt of N-chloro-4-methylbenzenesulphonamide (chloramine-T or CAT) and traces of Copper (II) in a buffer medium of pH ...
Nagaraja, P., Srinivasa Murthy, K. C., Mohan, B. M., Yathirajan, H. S.   +3 more
core  

Validated UV-Visible Spectrophotometric Method for Quantitative Analysis of Glycyrrhizin

Aim: The study aimed to develop and validate a simple, accurate, precise and cost-effective UV-Visible spectrophotometric method for the estimation of Glycyrrhizin in bulk as well as in formulation.
Wakte, Pravin, Bhusari, Sachin, More , Bhagyashri   +2 more
core   +1 more source

Research into the possibility of reusing fire-extinguishing powders and reducing laboratory waste during quality control

Environmental Protection and Natural Resources
The study addresses the reutilization of fire-extinguishing powder in the context of circular economy principles. The aim of this study was to optimize the method for determining phosphate ions in order to minimize the amount of laboratory waste ...
Stepnevska Iana
doaj   +1 more source

Phytochemical study of cosmetics for hair coloring

Annals of Mechnikov's Institute, 2020
Introduction Henna-based cosmetic products are becoming increasingly popular. They can be used during pregnancy, lactation as well as for temporary children’s tattoo.
D Pietrzyk, K Paradowska, I Wawer, Ia Diakonova   +3 more
doaj  

Determining the Content of Silicon Dioxide in Bauxites Using X-Ray Fluorescence Spectrometry [PDF]

Iranian Journal of Chemistry & Chemical Engineering, 2019
The X-ray fluorescence spectrometry and the MA.BM.006 reference spectrophotometric methods were used to determine the content of SiO2 (%) in bauxites from different deposits.
Dragana Blagojević, Dragica Lazić, Dragana Kešelj, Branko Škundrić, Pero Dugić, Gordana Ostojić   +5 more
doaj  

Spectrophotometric methods For the determination of Flutamide in Tablets

, 2002
Simple and sensitive spectrophotometric methods for the determination of flutamide in either pure form or in its pharmaceutical preparations are described.
Nagaraja, P., Vasantha, R. A., Arun Kumar, H. R., Yathirajan, H. S.   +3 more
core  

Dual‐Function Cosubstrates Enable Threonine Dehydrogenase‐Driven Chemoenzymatic Pyrrole Synthesis

Angewandte Chemie International Edition, EarlyView.
Classical Knorr chemistry meets contemporary biocatalysis. Threonine dehydrogenase generates aminoacetone from l‐threonine, which is directly intercepted in a chemoenzymatic Knorr pyrrole synthesis. A dual‐function β‐dicarbonyl substrate serves as both pyrrole precursor and hydride acceptor for integrated NAD+ recycling, affording substituted pyrroles ...
Valentina Jurkaš, Fabian M. Kulier, Jorge González‐Rodríguez, Carlotta Chiesa, Peter Both, Peter Šiška, Fabio Parmeggiani, Florian Rudroff, Margit Winkler   +8 more
wiley   +1 more source

Simultaneous spectrophotometric method for determination of both ciprofloxacin and cephalexin by using H-point standard addition method

مجلة بغداد للعلوم
An easy, simple and accurate method for estimating ciprofloxacin in the presence of cephalexin or vice versa in a mixture of the two. It has been possible to successfully apply the proposed method H-point standard addition method (H-PSAM) in the ...
Kawther Ahmed Sadiq, Elham N. Mezaal, Maha A. Mohammed, Dheefaf F. hassan   +3 more
doaj   +1 more source

UNCATALYZED OXIDATION OF L(-)ARABINOSE BY ACIDIC MANGANESE (VII). OPTIMIZATION, STOICHIOMETRY, ACTIVATION FUNCTIONS AND MECHANISM

Scientific Study & Research: Chemistry & Chemical Engineering, Biotechnology, Food Industry, 2023
The uncatalyzed oxidation of L(-)arabinose by manganese (VII) in acidic medium of H2SO4 and constant ionic strength (using potassium nitrate) were investigated kinetically.
MUSTAFA JAIP ALLAH ABDELMAGEED ABUALREISH
doaj  

Development and Validation of a Cellulose‐Coated Stir Bar Sorptive Extraction Method for a Simple, Environmentally Friendly Approach to Measuring Free Glycerol in Biodiesel

Journal of the American Oil Chemists' Society, EarlyView.
Preparation of a highly porous cellulose‐coated stir bar for the selective, environmentally friendly extraction of free glycerol from biodiesel using the SBSE method, followed by HPLC‐DAD analysis of the extract after derivatization with benzoyl chloride.
Caroline Lopes da Silva, Maria Aparecida Barros, Antônio Carlos Ferreira Batista, Anizio Marcio de Faria   +3 more
wiley   +1 more source