Results 31 to 40 of about 4,436 (242)

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

Anais 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, Veeraiah Ramakrishna, Chikkaswamy Somashekar, Urdigere R. Anil Kumar   +3 more
doaj   +1 more source

Effect of wood aging on wine mineral composition and 87Sr/86Sr isotopic ratio [PDF]

, 2017
The evolution of mineral composition and wine strontium isotopic ratio 87Sr/86Sr (Sr IR) during wood aging were investigated. A red wine was aged in stainless steel tanks with French oak staves (Quercus sessiliflora Salisb.), with three industrial ...
Catarino, Sofia, Curvelo-Garcia, A.S., Kaya, Ayse D., Ricardo-da-Silva, Jorge M., Sousa, Raúl Bruno de   +4 more
core   +1 more source

Study on low-grade galena-barite ore beneficiation in Khuzdar, Balochistan, Pakistan [PDF]

, 2019
Purpose. Galena and barite are the principal minerals of lead and barium respectively. Both minerals are used extensively in industries because of their distinct properties.
Bashir, F, Bhatti, M.A., Hafeez, I, Kazmi, K.R., Mahmood, Z, Nasir, S, Raza, M.A.   +6 more
core   +1 more source

Electroanalytical determination of codeine in pharmaceutical preparations [PDF]

, 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, Delerue-Matos, Cristina, Garrido, Jorge, Macedo, Tice R. A., Oliveira-Brett, A. M.   +4 more
core   +1 more source

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

Kemija 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, Nevena Hromiš, Senka Popović, Danijela Šuput, Jovana Pantić, Ivana Čabarkapa   +5 more
doaj   +1 more source

Quantitative determination of pefloxacin mesylate by residual-base neutralisation method [PDF]

Journal of the Serbian Chemical Society, 2004
This work describes two procedures based on residual base determination for the quantification of pefloxacin mesylate (PFM) in bulk drug and in pharmaceutical products.
HULIKALCHANDRA SHEKAR PRAMEELA, KANAKAPURA BASAVAIAH   +1 more
doaj  

Safety of oil from Schizochytrium sp. A2 for use in infant and follow‐on formula as a novel food pursuant to regulation (EU) 2015/2283

EFSA Journal, Volume 24, Issue 5, May 2026.
Abstract Following a request from the European Commission, the EFSA Panel on Nutrition, Novel Foods and Food Allergens (NDA) was asked to deliver an opinion on the safety of an oil derived from the microalga‐like organism Schizochytrium sp. A2 as a novel food (NF) pursuant to Regulation (EU) 2015/2283.
EFSA Panel on Nutrition, Novel Foods and Food Allergens (NDA), Dominique Turck, Torsten Bohn, Montaña Cámara, Jacqueline Castenmiller, Stefaan De Henauw, Ángeles Jos, Alexandre Maciuk, Inge Mangelsdorf, Breige McNulty, Androniki Naska, Kristina Pentieva, Alfonso Siani, Frank Thies, Thomas Frenzel, Margarita Aguilera‐Gómez, Francesca Marcon, Monika Neuhäuser‐Berthold, Irene Nuin Garciarena, Emanuela Turla, Areti Favata, Karen Ildico Hirsch‐Ernst   +22 more
wiley   +1 more source

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

Química 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, José Anchieta Gomes Neto   +1 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]

, 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, Weber, Michael, Wüthrich, Jürg   +2 more
core  

Quantitation Methods of Thermopsis Alkaloids: A Review

Регуляторные исследования и экспертиза лекарственных средств
INTRODUCTION. The major alkaloids of Thermopsis lanceolata R. Br. herb are thermopsine (N-methylcytisine), pachycarpine, and anagyrine, while the seeds predominantly contain cytisine used to treat tobacco addiction. Differing toxicity and pharmacological
N. P. Antonova, S. D. Kakhramanova, S. D. Alidzhanova, S. S. Prokhvatilova, E. P. Shefer   +4 more
doaj   +1 more source