Partition Coefficients
Mostrando 1-12 de 77 artigos, teses e dissertações.
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1. EXTRAÇÃO DE CORANTES TÊXTEIS UTILIZANDO SISTEMAS AQUOSOS BIFÁSICOS COMPOSTOS POR 2-PROPANOL E SAIS DE SULFATO
Aqueous Two Phase Systems (ATPS) composed of 2-propanol + inorganic salt (Na2SO4/MgSO4) + water, at different temperatures T = (20, 30, 40 and 50) °C were applied in the partition studies of the textile dyes Yellow, Blue Royal and Red Dianix CC. The thermodynamic parameters of the free transfer energy (∆Gtr), enthalpy (∆Htr) and entropy (∆Str), respec
Química Nova. Publicado em: 2022
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2. Reflection of attenuated waves at the surface of a fractured porous solid saturated with two immiscible viscous fluids
The mathematical model for wave motion in a fractured porous solid is solved for the propagation of harmonic plane wave along a general direction in 3-D space. The solution is obtained in the form of Christoffel equations, which are solved further to define the complex velocities and polarisations of five attenuated wavesin the medium. Four of these waves ar
Lat. Am. j. solids struct.. Publicado em: 2014-12
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3. Análise de agrotóxicos em água usando extração líquido-líquido com partição em baixa temperatura por cromatografia líquida de alta eficiência
This study optimized and validated the liquid-liquid extraction technique with partition at low temperature (LLE-PLT) for identification and quantification of four pesticides (chlorpyrifos, λ-cyhalothrin, permethrin, bifenthrin) in water samples. Analyses were performed by HPLC-UV. The technique was efficient for pesticide recovery with extraction exceeding
Quím. Nova. Publicado em: 2012
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4. Predicting partition coefficients of migrants in food simulant/polymer systems using adaptive neuro-fuzzy inference system
A contaminação de alimentos pela migração de aditivos de baixo peso molecular em alimentos processados industrialmente pode ser resultado do contato direto entre a embalagem e o alimento. A concentração do aditivo que migra do material da embalagem para o alimento está relacionada com as propriedades estruturais do aditivo, bem como com a natureza do
Journal of the Brazilian Chemical Society. Publicado em: 2011-08
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5. Molecular structure-affinity relationship of dietary flavonoids for bovine serum albumin
The relationship between the molecular structure of dietary flavonoids and their affinities for bovine serum albumin (BSA) were fully investigated by fluorescence titration analysis. The binding process with BSA was significantly affected by the molecular structure of flavonoids under study. The methylation of hydroxyl group in flavonoids enhanced their bind
Revista Brasileira de Farmacognosia. Publicado em: 08/07/2011
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6. Effects of spontaneous symmetry breaking-CPT and Lorentz invariance of the phenomenon the Bose-Einstein / Efeitos da quebra espontânea da simetria-CPT e da invariância de Lorentz no fenômeno da condensação de Bose-Einstein
The Bose-Einstein condensate (BEC), also known as the fifth state of the matter, was predicted theoretically by Albert Einstein in 1925 and verified experimentally 70 years later in 1995. This dissertation addresses the effects of spontaneous broken of the CPT-symmetry and of the invariance Lorentz (also called simply the violation of Lorentz symmetry) in th
Publicado em: 2011
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7. Biodegradação de alcoóis, ftalatos e adipatos em um solo tropical contaminado
The adipic and phthalic acid esters are plasticizers, have low water solubility, high partition octanol/water coefficients (Kow) and accumulate in soil and sediments. These compounds are considered teratogenic, carcinogenic and endocrine disruptors chemicals. This study evaluated the bioremediation of tropical soil contaminated with plasticizers process wast
Química Nova. Publicado em: 2010
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8. VALIDATION AND APPLICATION OF A MODIFIED QuEChERS METHOD AND GC-ECD FOR THE DETERMINATION OF PESTICIDE RESIDUES IN RICE GRAIN AND HUSK / VALIDAÇÃO E APLICAÇÃO DE MÉTODO EMPREGANDO QuEChERS MODIFICADO E GC-ECD PARA DETERMINAÇÃO DE RESÍDUOS DE PESTICIDAS EM GRÃO E CASCA DE ARROZ
The current agriculture is characterized by the use of new technologies and equipment, the increased number of agronomic research and the use of a variety of inputs such as pesticides and fertilizers. All this is directly related to human health risks and environmental contamination caused by the intensive use of pesticides. Among the main food consumed by h
Publicado em: 2010
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9. Geoquímica de Sills Basálticos da formação Serra Geral, sul do Brasil, com base em rocha total e micro-análise de minerais
O grande magmatismo intracontinental ocorrido a 133 Ma na Bacia do Paraná foi desenvolvido por um sistema fissural no qual a interação da Pluma Tristão da Cunha na base da litosfera (com ou sem contaminação crustal) gerou derrames, diques e sills no Brasil, nos Estados do RS, SC, PR, SP, MT, MS e GO, e em parte do Paraguai, Argentina e Uruguai. Na Form
Publicado em: 2010
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10. O impacto do fundo de participação dos estados nas finanças estaduais no período de 1986 a 2007
This work studies the resources distribution of resources from the States Participation Fund (FPE) and the effect of the fund in the revenue of the states. It examines the theories of fiscal federalism in Tiebout (1956), Oates (1972, 1981, 1999) and Stiglitz (1999) and how is the evolution of Brazilian fiscal federalism. It also discusses the effects of Comp
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/06/2009
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11. Combinação de múltiplos classificadores para reconhecimento de face humana
Lately, the human face object has been exploited by the advent of systems involving biometrics, especially for applications in security. One of the most challenging applications is the problem of human face recognition, which consists of determining the correspondence between an input face and an individual from a database of known persons. The process of fa
Publicado em: 2009
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12. Avaliação e caracterização de sistemas baseados em ponto nuvem visando a remoção de albumina do plasma sanguineo / Evaluation and characterization of cloud point based systems for albumin removal from blood plasma
In this work the partition behavior of albumin was studied, which is found at high concentrations in blood plasma, which interferes in many analytical techniques determinations. The present study evaluated different aqueous two-phase systems, exploiting a phenomenon called of cloud point. These systems employ surfactants under specific experimental condition
Publicado em: 2008