Equilibration Time
Mostrando 1-12 de 84 artigos, teses e dissertações.
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1. Stability-indicating capillary zone electrophoresis assay for the analysis of linezolid in tablets
A simple and fast alternative methodology using capillary zone electrophoresis (CZE) to analyze linezolid and its cationic photodegradation products in tablets has been developed. The separation was carried out on fused silica capillary and conducted using 100 mM formic acid (pH 3.0) and by applying 30 KV voltage. Detection was performed at UV 254 nm. The op
Braz. J. Pharm. Sci.. Publicado em: 08/04/2019
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2. Identification and quantification of genipin and geniposide from Genipa americana L. by HPLC-DAD using a fused-core column
Abstract In this work, it was developed a fast, simple and selective method for quantification of genipin and geniposide from unripe fruits of genipap, which are known as natural colorants, blue and yellow, respectively. The compounds separation was performed in a fused-core C18 column using as mobile phase water (A) and acetonitrile (B) both acidified with
Food Sci. Technol. Publicado em: 19/03/2018
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3. Ligandless cloud point extraction of trace amounts of palladium and rhodium in road dust samples using Span 80 prior to their determination by flame atomic absorption spectrometry
In this study, a procedure is developed for cloud point extraction of Pd(II) and Rh(III) ions in aqueous solution using Span 80 (non-ionic surfactant) prior to their determination by flame atomic absorption spectroscopy. This method is based on the extraction of Pd(II) and Rh(III) ions at a pH of 10 using Span 80 with no chelating agent. We investigated the
Quím. Nova. Publicado em: 2014
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4. Criopreservação do sêmen canino com um diluidor à base de água de coco na forma de pó (ACP - 106): efeito do tempo de equilíbrio e da taxa de descongelação / Cryopreservation of canine semen with an extender based coconut water as a powder (ACP - 106 ): effect of equilibration time and the rate of thawing
Devido ao crescente interesse de criadores de cães em resguardar o potencial genético daqueles animais de alto valor zootécnico e afetivo, vários pesquisadores têm se dedicado ao estudo de técnicas que viabilizem a conservação de sêmen por longos períodos sem comprometer, no entanto, a sua capacidade de fertilização.Dessa forma, esse este trabalh
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/12/2007
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5. Study on factors which affect the accuracy of the filter-paper method. / Estudo sobre fatores que influenciam a acurácia do método do papel-filtro.
The purpose of this work is to verify the susceptibility of the filter-paper method to variations in three experimental parameters: roughness of porous medium (structure of porous matrix), period of exposition of the filter-paper to pore water (equilibration time) and degree of deficiency in contact between the filter-paper and the porous medium. In order to
Publicado em: 2007
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6. A função simbolica como um meio para avaliação e intervenção em atendimentos psicopedagogicos : um estudo de caso / The symbolic function as a way for evaluation and intervention in psychopedagogics attendance: a case study
Based on Jean Piaget?s theory, this work is focused on the use of the representation conducts of the symbolic function, which a child presents in his or her preoperational stage of development, as a means to evaluate and to intervene in infants psycho-pedagogical consulting. A case study with a five years old child (hereby called GIL) was conducted between M
Publicado em: 2006
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7. Psychomotor Profile: Characterization of Schoolchildren Attending the First Grade at a Private Elementary School. / Perfil psicomotor: caracterização de escolares da primeira série do ensino fundamental de colégio particular.
The aim of this study was to characterize the psychomotor profile of schoolchildren attending the first grade in Elementary School, considering their gender, gestational age and physical aspect, as well as to analyze the relationship between motor and school performances. After obtaining parental consent, 37 children (20 boys and 17 girls) aging 6,5 to 7,8 y
Publicado em: 2005
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8. Método de estudo da adsorção de triadimenol com micro-colunas de solo e centrifugação
Normally, the determination of equilibrium constants (k d) in batch experiments uses a high solution to soil ratio, which does not represent field conditions. In this study we present an alternative method to evaluate adsorption constants, using micro-columns of soil at higher soil to solution ratios. The centrifugation force and equilibration time were inve
Química Nova. Publicado em: 2004-06
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9. Analise de constituintes volateis de plantas aromaticas por micro-extração em fase solida acoplada a cromatografia gasosa (SPME/CG)
The objectives of this work were the optimization of a methodology using Solid Phase Microextraction (SPME) for analysis of volatile compounds produced by aromatic plants, and the application of this methodology to real samples. The experiments showed that the best results were obtained using SPME fibers recovered with 100 mm polydimethylsiloxane and with th
Publicado em: 2001
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10. Equilibration and exchange of fluorescently labeled molecules in skinned skeletal muscle fibers visualized by confocal microscopy.
Confocal laser fluorescence microscopy was used to study in real time under nearly physiological conditions the equilibration and exchange characteristics of several different fluorescently labeled molecules into chemically skinned, unfixed skeletal muscle fibers of rabbit psoas. The time required for equilibration was found to vary widely from a few minutes
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11. Picosecond conformational transition and equilibration of a cyclic peptide
Ultrafast IR spectroscopy is used to monitor the nonequilibrium backbone dynamics of a cyclic peptide in the amide I vibrational range with picosecond time resolution. A conformational change is induced by means of a photoswitch integrated into the peptide backbone. Although the main conformational change of the backbone is completed after only 20 ps, th
National Academy of Sciences.
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12. COMPARISON BETWEEN THE TIME AVAILABLE AND THE TIME REQUIRED FOR CO2 EQUILIBRATION IN THE LUNG*