Single Point Determination
Mostrando 1-12 de 60 artigos, teses e dissertações.
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1. 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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2. Fast Determination of Iodine Number of Biodiesel Using Capillary Zone Electrophoresis with Multi- and Single-Point Calibration
A new and fast method was developed to determine the iodine number of biodiesel samples by capillary zone electrophoresis (CZE). In this procedure, the biodiesel sample reacts with Wijs solution in the presence of a catalyst and all the remaining iodine monochloride is converted to the iodide ion, which is quantified by CZE. Only small amounts of sample and
J. Braz. Chem. Soc.. Publicado em: 2019-02
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3. Seasonal variation, method of determination of bovine milk stability, and its relation with physical, chemical, and sanitary characteristics of raw milk
ABSTRACT The objective of this research was to determine the variation of milk stability evaluated with ethanol, boiling, and coagulation time tests (CTT) to identify milk components related with stability and verify the correlation between the three methods. Bulk raw milk was collected monthly at 50 dairy farms from January 2007 to October 2009 and physicoc
R. Bras. Zootec.. Publicado em: 2017-04
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4. Uma sistematização para o planejamento da gerência de mudança em TI e modelagem de uma ferramenta
The IT (Information Technology) Governance is defined as a set of rules, activities and processes, providing corporate business objectives. Currently, the change management is presented as an important point of the IT governance, based on constant development of studies to build the best scheme for implementing changes. It, basically, consists to allocate op
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/09/2011
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5. Extensiometria óptica por Moiré geométrico digital para anãlise de tensões no plano / Optical extensometry by digital geometric Moiré for in-plane stress analysis
The study of the behavior of building structures pass through the determination of the strain and stresses to evaluate the level of local and global security against the active actions. In the last years in Brazil, the extensometers have been commonly used to measure the strain at a specific single point. The optical extensometry presents itself as an altern
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/06/2011
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6. Estudo do comportamento PVT de misturas de metano e fluidos de perfuração base éster / Study of the PVT behavior of methane and ester based drilling fluids mixtures
During conventional drilling operations, it is necessary to maintain the wellbore pressure greater than the reservoir pore pressure, otherwise a kick may occur. If the well control procedure is not effective during the circulation of the formation influx out of the well, a blowout could happen, which is a dangerous event concerning safety and environmental i
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/06/2010
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7. Estudo físico-químico de copoliéteres por viscosimetria / Physical-chemical study of copolyethers by viscosimetry
A viscosimetria é um procedimento experimental simples e pouco oneroso, que pode fornecer informações valiosas sobre o volume hidrodinâmico e a conformação de macromoléculas em solução, num determinado solvente, em uma dada temperatura. Os parâmetros viscosimétricos podem ser matematicamente calculados por extrapolação gráfica, cuja execução
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/07/2009
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8. Single point diamond turning of the tungsten carbide / Usinabilidade do carbeto de tungstênio no torneamento com ferramenta de diamante
The single point diamond turning of the Tungsten Carbide is presented. The motivation for this study is the material´s high hardness and potential application for micromolds. A Tungsten Carbide sample was subjected to tests for determination of cutting parameters to achieve the ductile regime of material removal. Based on experimental results it was conclud
Publicado em: 2009
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9. Caracterização dos resíduos esgotados de sistemas de tratamento individual de esgotos de Natal
In Natal still dominates the use of individual disposal systems for domestic sewage, once only 29% of the city has a sewarage system. Wastes that are accumulated in these individual treatment systems should be exhausted periodically, service provided by collector entrepreneurs. Some of these companies causing major damage to the environment. In Natal, only t
Publicado em: 2009
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10. FATORES SOCIODEMOGRÁFICOS E CLÍNICOS DE INTERNAÇÕES PSIQUIÁTRICAS VOLUNTÁRIAS E INVOLUNTÁRIAS EM FORTALEZA CEARÁ FORTALEZA - CEARÁ 2009
The objective of this research is to evaluate social-demographic and clinical factors of involuntary psychiatric internments (IPI s) and voluntary (VPI s), in psychiatric hospitals, arrangements with the Unified Health System (SUS), Fortaleza, Ceará, in 2007. This is a case study, of transversal nature, with use of documents, which studied the descriptive a
Publicado em: 2009
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11. Graus-dia, temperatura base e coeficientes de cultura para cafeeiros arabica vem fase de implantaÃÃo / Degree-day, base temperature and crop coefficients for arabic coffee plants in implantation phase.
This work had as purpose the determination of the inferior and superior base temperature as well crop coefficients, Kc for two cultivars of Arabic coffee, Acaià Cerrado(MG-1474) and Ruby (MG-1192), , in way to allow the representation of the growing degree-day (GDD) based crop coefficients.The experiment was carried out in the âFederal University of Lavras
Publicado em: 2006
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12. INVESTIGAÇÃO DE COMPLEXOS BINUCLEARES DE K+ E CU(II) COM LIGANTES 1,3-DIARILTRIAZENIDOS SIMÉTRICOS / COMPLEXES INVESTIGATION BINUCLEARES OF K+ And Copper(II) WITH 1,3-DIARYLTRIAZENES AS LIGANDS SYMMETRICAL
At work present it synthesized and determined itself the molecular structure of a copper complex (II) and another of potassium in which both involve triazenides ligands monocatenados previously deprotonated. The reaction between hydroxide of solid potassium and it pre-ligand 1,3-bis(4-nitrophenyl)triazene, in methanol, originated the triazenide complex [K(O2
Publicado em: 2006