Internal Standardization
Mostrando 1-12 de 40 artigos, teses e dissertações.
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1. A Gas Chromatography Method for Simultaneous Quantification of Inorganic Gases and Light Hydrocarbons Generated in Thermochemical Processes
This paper reports a method for simultaneous determination of H2, O2, N2, CO, CO2, CH4, C2H2, C2H4, C2H6, C3H4 (propadiene and propyne), C3H6, C3H8 and C4H10 (n-butane and isobutane) by gas chromatography using thermal conductivity and flame ionization detectors. A single porous layer open tubular column (0.53 mm internal diameter ? 30 m length ? 30 µm thic
J. Braz. Chem. Soc.. Publicado em: 2021-06
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2. Calibration Strategies Applied to Laser-Induced Breakdown Spectroscopy: A Critical Review of Advances and Challenges
Over the years, laser-induced breakdown spectroscopy (LIBS) has been reported in the literature as an alternative to traditional methods of analysis, becoming well established among spectroanalytical techniques. LIBS is a technique widely used for qualitative approaches; however, it is necessary considerable effort for use in quantitative analysis, mainly du
J. Braz. Chem. Soc.. Publicado em: 2020-12
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3. Análise Acústica de Fachadas de Light Steel Frame e Placas Cimentícias
RESUMO A construção a seco tem sido considerada uma alternativa tecnológica aos sistemas construtivos convencionais e, no Brasil, sistemas como o Light Steel Frame e Drywall passaram a ser empregados em maior escala nos últimos anos. Basicamente, estes sistemas consistem em painéis estruturados por perfis de aço, preenchidos internamente por uma lã de
Matéria (Rio J.). Publicado em: 10/06/2019
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4. NORMATIVE ISOMETRIC HIP MUSCLE FORCE VALUES ASSESSED BY A MANUAL DYNAMOMETER
RESUMO Objetivo: Determinar valores da força dos músculos do quadril em mulheres jovens, normalizados pela porcentagem do peso corporal. Métodos: Incluídas 52 mulheres entre 20 e 29 anos, sem queixas algicas no quadril, consideradas sedentárias ou irregularmente ativas e com IMC entre 18,50 e 24,99 kg/m2. Todas participantes foram submetidas a avalia�
Acta ortop. bras.. Publicado em: 2019-04
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5. Simultaneous Determination of Furan and Vinyl Acetate in Vapor Phase of Mainstream Cigarette Smoke by GC-MS
ABSTRACT A simple and sensitive method for simultaneous determination of furan and vinyl acetate (VA) in vapor phase of mainstream cigarette smoke with cold trap and gas chromatography-mass spectrometry (GC-MS) was developed. A Cambridge filter pad (CFP) was placed in front of the impingers of smoking machine to remove the particle phase from cigarette smoke
An. Acad. Bras. Ciênc.. Publicado em: 04/05/2017
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6. Sheep Model for Uterine Transplantation: The Best Option Before Starting a Human Program
OBJECTIVE: This study reports the first four cases of a uterine transplant procedure conducted in sheep in Latin America. The aim of this study was to evaluate the success of uterine transplantation in sheep. METHOD: The study was conducted at Laboratory of Medical Investigation 37 (LIM 37) at the University of São Paulo School of Medicine. Four healthy m
Clinics. Publicado em: 2017-03
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7. Tracking false-negative results in molecular diagnosis: proposal of a triplex-PCR based method for leishmaniasis diagnosis
Background : Molecular biological methods have become increasingly relevant to the diagnosis and control of infectious diseases, such as leishmaniasis. Since various factors may affect the sensitivity of PCR assays, including DNA yield and purity, an optimal extraction method is pivotal. Losses of a parasite’s DNA during extraction may significantly impa
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 20/05/2014
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8. Separação e determinação quantitativa dos alcanos lineares e dos cíclicos/ramificados em petróleos brasileiros por aduto de ureia e cromatografia gasosa: um estudo de caso revisitado
A complete analysis of oils and their fractions allows correlations to be defined between their composition and derivatives or related geological materials. This work focused on optimization and implementation of a method for separation and quantification of n-alkanes in Brazilian oil samples by urea adduction and GC-FID techniques. Ten samples with differen
Quím. Nova. Publicado em: 2014
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9. Avaliação de adolescentes em conflito com a lei: adaptação transcultural do Inventário de Personalidade de Jesness / Assessment of juvenile delinquents: cross-cultural adaptation of Jesness Personality Inventory
In Juvenile Justice System, assess the level of involvement of adolescents who commit criminal acts is crucial to judicial decision-making and to direct socio-educational interventions. In this context, the assessment of personality aspects helps verify how much activity infraction reports to developmental deficits. Studies have shown that the Jesness Person
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/08/2012
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10. Aspectos analíticos da resposta do detector de ionização em chama para ésteres de ácidos graxos em biodiesel e alimentos
The analysis of fatty acid (FA) esters by gas chromatography and flame ionization detector (FID) normally uses the normalization method. However, if one FA is wrongly estimated, the results could be greatly affected. In this study, methodologies using internal standards and correction factors for the FID response are described. The results show that by using
Química Nova. Publicado em: 2012
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11. Ambiente de inovação em uma organização hospitalar: percepção por meio de um sistema de informação
The competition is among the biggest challenges in the organizations and their managers. Changes in methods, systems, processes and hence products and services are current events. In this context innovation has a determinant role, and knowing the factors that foster the development of organizational environments geared to innovation, it has become essential.
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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12. Internal standard versus external standard calibration: an uncertainty case study of a liquid chromatography analysis
Traditionally, in the cigarettes industry, the determination of ammonium ion in the mainstream smoke is performed by ion chromatography. This work studies this determination and compares the results of this technique with the use of external and internal standard calibration. A reference cigarette sample presented measurement uncertainty of 2.0 μg/cigarette
Química Nova. Publicado em: 2010