Polarity
Mostrando 1-12 de 1472 artigos, teses e dissertações.
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1. Predominant polarity and associated post-traumatic stress disorder in patients with comorbid bipolar disorder and borderline personality disorder: a cross-sectional study
Brazilian Journal of Psychiatry. Publicado em: 2022
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2. What is new in non-chromatographic flavonoid purification?
Flavonoids are metabolites occurring in all plant tissues and present different biological activities. They occur in a mixture of similar polarity with laborious separation and purification processes, usually furnishing low yields. Semi-preparative chromatographic methods are universally employed procedures for their isolation. This paper discusses the state
Química Nova. Publicado em: 2022
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3. A Systematic Pipeline to Enhance the Fecal Metabolome Coverage by LC-HRMS
The comprehended knowledge of the metabolic profile of the fecal matter has been recognized as an important point for understanding metabolic changes in the human systemic metabolism and it can provide precious information about host-gut microbiota interactions. However, few analytical strategies have been addressed for a broad analysis of metabolites with d
J. Braz. Chem. Soc.. Publicado em: 2021-07
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4. Blue Glow Sticks: Cinnamic Acids and Arylacrylonitriles with Liquid-Crystalline Properties and Highly Fluorescent
Five new π-conjugated chromophores derived from acrylic acid and acrylonitrile were synthesized and their thermal and photophysical behaviors were analyzed. They were designed and synthesized through Knoevenagel condensations between arylacetylenebenzaldehydes and a methylene group activated from cyanoacetic and malonic acids. The characterization of the ta
J. Braz. Chem. Soc.. Publicado em: 2021-01
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5. Synthesis and Evaluation of Nematicidal Activity of Compounds Derived from Norbornadiene
Nematode is a major problem in agriculture, the effective way to control this pest is through chemical control, but the efficient molecules present in the market have great toxicity to mammals and birds. Thus, there is a constant demand for the development of new nematicide molecules. This study describes the synthesis of 21 novel esters derived from norborn
J. Braz. Chem. Soc.. Publicado em: 2020-09
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6. UNRAVELING THE SOLVATOCHROMISM OF A TRIARYLMETHANE DYE BY RESONANCE RAMAN SPECTROSCOPY
The effect of the solvent on the electronic properties of the triarylmethane dye rosolic acid (RA) is investigated by means of UV-VIS and resonance Raman (RR) spectroscopies. The comparison of the solvatochromic behavior of both neutral and dianionic species of RA in acetonitrile, dimethylsulfoxide, and methanol illustrates the effect of polarity and hydroge
Quím. Nova. Publicado em: 05/12/2019
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7. O mundo nas mãos do adolescente: entre Apolo e Dioniso, entre o eros e o caos
Resumo A partir da série Poderosa, de Sérgio Klein, analiso a representação do adolescente na personagem-heroína Joana Dalva, que tem o dom de mudar os acontecimentos através da escrita. A análise parte da polaridade Apolo/Dioniso conforme Friedrich Nietzche e começa por apresentar a série em seu contexto gráfico, mostrando como ele contribui para
Estud. Lit. Bras. Contemp.. Publicado em: 31/10/2019
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8. A power law study of the edge influence on the perceived filling-in brightness magnitude
Abstract: Background: Edge plays a special role in spatial perception and as well as in determining the brightness of a surface within borders. The aim of our study was to measure threshold brightness in different levels of edges thickness. Methods: Steven's power law for circles modulating in luminance was estimated for 30 subjects (mean age 24 years, SD
Psicol. Reflex. Crit.. Publicado em: 14/10/2019
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9. Configuração espacial em cidades aglomeradas: explorando os efeitos da atratividade do terciário na região da Serra Gaúcha, RS
Resumo O trabalho aborda as aglomerações urbanas e seus possíveis efeitos na estrutura espacial das cidades que as compõem. Uma aglomeração urbana pressupõe a existência de fortes inter-relações socioespaciais entre cidades próximas e complementaridade entre atividades (habitação, emprego, estudo, serviços, entre outras). O objetivo deste traba
urbe, Rev. Bras. Gest. Urbana. Publicado em: 03/10/2019
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10. ETHANOLIC AND HYDROALCOHOLIC EXTRACTS OF PITANGA LEAVES (Eugenia uniflora L.) AND THEIR FRACTIONATION BY SUPERCRITICAL TECHNOLOGY
Abstract Hydroalcoholic extracts prepared by conventional methods (in stirred vessel at 25 °C and 1 bar) and, hydroalcoholic and supercritical carbon dioxide (scCO2) extracts prepared in fixed bed extractors (60 ºC and 400 bar) were obtained from pitanga leaves (Eugenia uniflora L.) in order to recover phenolic compounds. Hydroalcoholic and ethanolic extra
Braz. J. Chem. Eng.. Publicado em: 30/09/2019
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11. Quem é Shar em NW e suas traduções para o português? Um estudo da representação da personagem baseado em valores atitudinais
Resumo: Este trabalho se apoia na perspectiva martiniana da Linguística Sistêmico-Funcional (MARTIN 1992, MARTIN; ROSE 2007) para abordar a tradução como reinstanciação interlinguística (SOUZA, 2010), adotando um enfoque interpessoal. O objetivo é estudar a representação de uma personagem da narrativa NW e de suas traduções para o português e el
Ilha Desterro. Publicado em: 29/08/2019
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12. Embates e disputas na política nacional de Educação Especial brasileira
Resumo A elaboração da Constituição Federal , na década de 1980, evidenciou processos de lutas de interesses entre diferentes setores da sociedade na elaboração de políticas públicas no Brasil. As políticas de educação especial têm sido elaboradas nessas circunstâncias, sob as pressões de segmentos sociais. Com atenção a essa dinâmica, este
Educ. Pesqui.. Publicado em: 29/08/2019