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Mostrando ítems 1-10 de 2023
The electrochemical reaction mechanism of arsenic on gold analyzed by anodic stripping Square-wave voltammetry
(Pergamon-Elsevier Science Ltd, 2017-02)
The reaction mechanism of the oxidative stripping of As(0) accumulated on a polycrystalline gold electrode is studied theoretical and experimentally by Square-wave voltammetry (SWV). A mathematical model was developed ...
KINETICS AND MECHANISM OF THE AMINOLYSIS OF 2,4-DINITROPHENYL AND 2,4,6-TRINITROPHENYL THIOLACETATES
(ROYAL SOC CHEMISTRY, 1991)
The reactions of the title substrates with alicyclic secondary amines and pyridines are subject to a kinetic study in water [25-degrees-C, ionic strength 0.2 mol dm-3 (KCl)]. The Bronsted-type plots obtained for all ...
Aeration step method for k(L)a measurement under growth conditions in pneumatic bioreactors
(Wiley-Blackwell, 2019-07-01)
Background Determination of the volumetric oxygen transfer coefficient (k(L)a) plays an important role in the design and characterization of bioreactors. Among all methods available, few techniques are suitable for the ...
Efeito de dança aeróbia e step sobre as respostas afetivas de mulheres idosas
(Universidade Tecnológica Federal do ParanáCuritibaDepartamento de Educação Física, 2013-05-16)
Recent evidence suggests that affective responses of pleasure/displeasure during exercise are related to initial engagement and adherence to an exercise program. However, these effects were verified by acute responses ...
Molecular-level Understanding of the Rate-determining Step in Esterification Reactions Catalyzed by H-ZSM-5 Zeolite. An Experimental and Theoretical Study
(Wiley Blackwell Publishing, Inc, 2019-03)
Transformation of biomass into renewable energy products is currently one of the most promising technologies for dropping dependence on fossil fuels. Biodiesel production may improve with the use of heterogeneous catalysts, ...
Schiff bases of pyridoxal and polyallylamine. The formation rate determining step
(JOHN WILEY & SONS INC, 1998)
The apparent rate constants of formation (k(1)) and hydrolysis (k(2)) of the Schiff bases formed between pyridoxal and polyallylamine has been fitted to a kinetic scheme that involve the different protonated species in the ...
From Clinical Symptoms to MR Imaging: Diagnostic Steps in Adenomyosis
(Hindawi, 2017)
Adenomyosis or endometriosis genitalis interna is a frequent benign disease of women in fertile age. It causes symptoms like bleeding disorders and dysmenorrhea and seems to have a negative effect on fertility. Adenomyosis ...
A pragmatic stepped-wedge cluster randomized trial to evaluate the effectiveness and cost-effectiveness of active case finding for household contacts within a routine tuberculosis program, San Juan de Lurigancho, Lima, Peru
(Elsevier, 2020)
Background: Active case finding (ACF) in household contacts of tuberculosis (TB) patients is now recommended for National TB Programs (NTP) in low- and middle-income countries. However, evidence supporting these recommendations ...
Reactions of Aryl Acetates with Secondary Alicyclic Amines in Ethanol/Water Mixtures: Effect of the Solvent Composition on the Kinetics and Mechanism
(2011)
We report a kinetic study on the reactions of secondary alicyclic amines toward 4-nitrophenyl, 2,4-dinitrophenyl, and 2,4,6-trinitrophenyl acetates (1, 2, and 3) in ethanol/water mixtures of different compositions. It is ...
Reactions of Aryl Acetates with Secondary Alicyclic Amines in Ethanol/Water Mixtures: Effect of the Solvent Composition on the Kinetics and Mechanism
(2011)
We report a kinetic study on the reactions of secondary alicyclic amines toward 4-nitrophenyl, 2,4-dinitrophenyl, and 2,4,6-trinitrophenyl acetates (1, 2, and 3) in ethanol/water mixtures of different compositions. It is ...