Results 91 to 100 of about 4,436 (242)

Exchangeable aluminum evaluation in acid soils

open access: yesScientia Agricola, 2003
One of the main factors limiting agricultural production in tropical climate regions is mainly related to the presence of exchangeable aluminum (Al3+) in highly weathered acid soils.
Cassio Hamilton Abreu Jr.   +2 more
doaj  

Homo- and Heteroligand Nickel(II) Complexes with Benzoic and para-Methoxybenzoic Acid Hydrazides and L-Histidine [PDF]

open access: yesУчёные записки Казанского университета: Серия Естественные науки, 2017
Complex formation of nickel(II) with benzoic, para-methoxybenzoic acid hydrazides, and L-histidine have been studied by the methods of pH-metric titrimetry, spectrophotometry, and mathematical modelling in aqueous solutions with 1.0 mol dm–3 KNO3 as ...
N.V. Troshanin   +4 more
doaj  

Simple and Rapid Methods for the Analysis of Captopril in Dosage Forms

open access: yesE-Journal of Chemistry, 2007
Two indirect methods are described for the micro determination of captopril using hexacyanoferrate (III) as reagent. The reaction used for titrimetry proceeds at room temperature and will be complete in 10 minute with a stoichiometry of 1:1 with respect ...
H. Chandru, A. C. Sharada
doaj   +1 more source

The Challenge of Measuring Sweet Taste in Food Ingredients and Products for Regulatory Compliance: A Scientific Opinion. [PDF]

open access: yesJ AOAC Int, 2022
Starkey DE   +18 more
europepmc   +1 more source

Sensing with FETs - once, now and future [PDF]

open access: yes, 2007
In this paper a short overview is given of the several FET-based sensor devices and the operational principle of the ISFET is summarized. Some of the shortcomings of the FET sensors were circumvented by an alternative operational mode, resulting in a ...
Berg, A. van den   +3 more
core   +1 more source

A novel method for quantitative determination of aceclofenac in bulk drug and tablets using sodium salicylate as a hydrotropic solubilizing agent

open access: yesJournal of Advanced Pharmaceutical Technology & Research, 2010
In titrimetric analysis costlier organic solvents are more often employed to solubilize the poorly water-soluble drugs. Volatility and pollution are drawbacks of such solvents.
R K Maheshwari, Shruti Moondra
doaj   +2 more sources

<b>Considerações sobre a determinação quantitativa de alendronato de sódio: titulometria x cromatografia</b>

open access: yesRevista de Ciências Farmacêuticas Básica e Aplicada, 2010
O alendronato de sódio é um composto aminodifosfonado capaz de se fixar à matriz óssea e inibir a reabsorção mediada por osteoclastos. A escassez de metodologias oficiais para a determinação quantitativa deste fármaco levou ao desenvolvimento de diversos
ANA FERREIRA RIBEIRO   +1 more
doaj  

François-Antoine-Henri Descroizilles (1781-1825), demostrador real de química, boticario, inventor y químico industrial: padre del análisis volumétrico. Parte 1ª [PDF]

open access: yes, 2018
In this contribution the life and work of François-Antoine-Henry Descroizilles is reviewed. He is recognized as a multifaceted person, and as a skilled and wise chemist by eminent scientists of his time.
García Asuero, Agustín   +2 more
core   +1 more source

Elaboration of techniques for analysis of antioxidant preparation «Vitaox»

open access: yesRUDN Journal of Medicine, 2011
Techniques of analysis of new antioxidant preparation «Vitaox» which contains dihydroquercetin and ascorbinic acid have been developed. It has been proposed to determine dihydroquercetin by method of high-performance liquid chromatography and an ...
A V Prostolupova   +3 more
doaj  

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