Results 31 to 40 of about 4,389 (243)

Degree of Chitosan Deacetylation: Potential of Experimental Equations Application [PDF]

open access: yesKemija u Industriji
In recent years, research has extensively explored the broad industrial potential of chitosan, with the degree of deacetylation being a pivotal chemical attribute that significantly influences its physical and biological properties crucial for its ...
Nadežda Seratlić   +5 more
doaj   +1 more source

Electroanalytical determination of codeine in pharmaceutical preparations [PDF]

open access: yes, 2002
A square wave voltammetric (SWV) method and a flow injection analysis systemwi th electrochemical detection (FIA-EC) using a glassy carbon electrode were evaluated for the determination of codeine in pharmaceutical preparations.
Borges, Fernanda   +4 more
core   +1 more source

Determination of Arbutin in Herbal Medicinal Products

open access: yesРегуляторные исследования и экспертиза лекарственных средств, 2021
Arbutin is the main active ingredient in many herbal medicinal products that have diuretic, antimicrobial, bactericidal, and antioxidant effects. Many of these products are mixtures of different herbal substances.
N. P. Antonova   +6 more
doaj   +1 more source

Biodiesel Production from Oleaginous Fungi [PDF]

open access: yes, 2012
Biodiesel involves the mixture of fatty acyl methyl/ethyl esters, produced from transesterification neutral lipids and if the origin of the source is from oleaginous micro organisms, then it is termed as micro diesel.
Dakshayini, J.   +2 more
core   +1 more source

Método titrimétrico para determinar fosfito em amostras agroindustriais Titrimetric method for phosphite determination in agricultural chemical samples

open access: yesQuímica Nova, 2007
A new titrimetric method for the determination of phosphite in fertilizer samples, based on reaction of H3PO3 with standard iodine solution in neutral media, is proposed. Diluted samples containing ca.
Vanessa Pezza Franzini   +1 more
doaj   +1 more source

Development of a reference material for the composition of 0.1 m potassium dichromate solution. Certified reference material GSO 10992-2017

open access: yesСтандартные образцы, 2019
This paper describes key stages in the development and investigation of a high-precision certified reference material (CRM) for the composition of potassium dichromate solution.
A. Yu. Shimolin, A. V. Sobina
doaj   +1 more source

Sensitive and rapid titrimetric and spectrophotometric methods for the determination of stavudine in pharmaceuticals using bromate-bromide and three dyes

open access: yesAnais da Academia Brasileira de Ciências, 2008
Four sensitive and rapid methods for the determination of stavudine (STV) in bulk drug and in dosage forms were developed and optimized. In titrimetry, aqueous solution of STV was treated with a known excess of bromate-bromide in HCl medium followed by ...
Kanakapura Basavaiah   +3 more
doaj   +1 more source

Titrimetric methods for determining cationic surfactants

open access: yesЖурнал органічної та фармацевтичної хімії, 2022
Aim. To generalize and systematize information on titrimetric methods for determining quaternary ammonium compounds (QACs). Results and discussion.
Mykola Ye. Blazheyevskіy   +3 more
doaj   +1 more source

High Precision Titrimetry, Ion Chromatography and ICP-Optical Emission Spectrometry for the Estimation of Inhomogeneities in Aqueous Calibration Solutions for Metrological Purposes [PDF]

open access: yes, 2018
.: The homogeneity of samples intended for metrological intercomparison studies must be granted without ambiguity. This holds equally true for aqueous solutions for which the determination of between-bottle variations requires measurement techniques with
Rezzonico, Sergio   +2 more
core  

Impact of process variables on the micromeritic and physicochemical properties of spray-dried microparticles, part II: physicochemical characterisation of spray-dried materials [PDF]

open access: yes, 2012
YesObjectives  In this work we investigated the residual organic solvent content and physicochemical properties of spray-dried chlorothiazide sodium (CTZNa) and potassium (CTZK) salts.
Al-Obaidi   +28 more
core   +1 more source

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