Liquid Solution
Mostrando 1-12 de 619 artigos, teses e dissertações.
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1. Phytocomponents, Evaluation of Anticholinesterase Activity and Toxicity of Hydroethanolic Extracts of Parkia platycephala Benth.
This study evaluated the chemical composition, antioxidant and anticholinesterase activities, and the toxicity of hydroethanolic extracts of the Parkia platycephala Benth. Hot extraction with 70% hydroethanolic solution was used to obtain crude extracts of the leaf (LE), bark (BE), flower (FE), and seed (SE). Separation and identification of the compounds we
Journal of the Brazilian Chemical Society. Publicado em: 2022
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2. 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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3. MÉTODO MANUAL PARA DEPOSIÇÃO DE TINTAS FOTOLUMINESCENTES BASEADAS EM LOFS MISTAS APLICADO A CODIFICAÇÃO DE DOCUMENTOS
In this work, the process of synthesis of Metal-Organic Frameworks containing lanthanide ions (LOFs), accelerated via a precipitating agent, capable of accelerating the process of nucleation of MOF crystals, in order to explore the optical properties of this precursor solution (SP_Gd/EU-MOF), as a quick-response photoluminescent material in the coding of off
Quím. Nova. Publicado em: 2020-12
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4. Preparation of a New Polymeric Deep Eutectic Solvent and Its Application in Vortex-Assisted Liquid-Liquid Microextraction of Parabens in Foods, Cosmetics and Pharmaceutical Products
A vortex-assisted liquid-liquid microextraction method combined with high performance liquid chromatography-diode array detector has been developed for the determination of parabens in foods, cosmetics and pharmaceutical products. In this work, polymeric deep eutectic solvents composed of DL-menthol and polyethylene glycol with three different light grades w
J. Braz. Chem. Soc.. Publicado em: 2020-10
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5. A Simple and Effective Liquid-Liquid-Liquid Microextraction Method with Ultraviolet Spectrophotometric Detection for the Determination of Bisphenol A in Aqueous Matrices and Plastic Leachates
This study shows the development and application of an analytical method for the determination of bisphenol A (BPA) in aqueous samples such as tap, river and mineral water and plastic leachates, based on an extensive literature search to understand the gaps for the determination of BPA in aqueous samples. We found that most of the methods in the literature e
J. Braz. Chem. Soc.. Publicado em: 2020-08
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6. Systemic treatment and surgery versus systemic treatment alone for metastatic breast cancer
This study shows the development and application of an analytical method for the determination of bisphenol A (BPA) in aqueous samples such as tap, river and mineral water and plastic leachates, based on an extensive literature search to understand the gaps for the determination of BPA in aqueous samples. We found that most of the methods in the literature e
Rev. Assoc. Med. Bras.. Publicado em: 2020-08
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7. Rapid Determination of Vitamins D2 and D3 in Dairy Products by High-Performance Liquid Chromatography after Solid Phase Extraction Based on Polystyrene/Polypyrrole Composite Nanofibers
The detection of vitamin D in complex samples is challenging because of the instability of vitamin D in sample preparation. To resolve this problem, packed-fiber solid-phase extraction (PFSPE) has been successfully developed for the pre-treatment of samples containing vitamin D2 (D2) and vitamin D3 (D3) in dairy products. Based on PFSPE, vitamin D could avoi
J. Braz. Chem. Soc.. Publicado em: 2020-06
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8. Efeitos da abreviação do jejum pré-operatório com solução de carboidrato e proteína em sintomas pós-operatórios de cirurgias ginecológicas: ensaio clínico randomizado controlado duplo-cego.
RESUMO Objetivo: investigar os efeitos da abreviação do jejum pré-operatório, uma recomendação do protocolo de “Aceleração da Recuperação Total Pós-operatória” (ACERTO), em sintomas pós-operatórios de pacientes submetidas à cirurgias ginecológicas. Métodos: estudo controlado, randomizado, duplo-cego, de 80 cirurgias ginecológicas real
Rev. Col. Bras. Cir.. Publicado em: 17/01/2020
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9. Preformulation of a liquid dosage formulation of captopril for pediatric use: drug-excipient compatibility and stability studies
Currently, medications used in children are typically modified from pharmaceutical dosage forms designed for adults. Captopril is widely adapted to liquid formulations for use in hospitals. Its stability in the aqueous medium is reduced since it undergoes oxidation producing captopril disulfide (its main metabolite). The aim of this formulation study was to
Braz. J. Pharm. Sci.. Publicado em: 20/12/2019
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10. Cryopreservation of Brazilian green dwarf coconut plumules by droplet-vitrification
RESUMO: O objetivo desse estudo foi avaliar o efeito das soluções de vitrificação e do tempo de exposição na criopreservação de plúmulas de coqueiro anão verde do Brasil de Jiqui (BGD), pela técnica de vitrificação em gotas. Os explantes foram excisados de frutos maduros oriundos do Banco de Germoplasma Ativo de Embrapa Tabuleiros Costeiros, Se
Cienc. Rural. Publicado em: 13/12/2019
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11. Influence of working pressure and spray nozzle on the distribution of spray liquid in manual backpack sprayers
RESUMO O uso de pulverizadores costais manuais no Brasil é amplamente disseminado em propriedades rurais. Entretanto, são escassos os trabalhos de pesquisa que avaliem as suas características de trabalho, sobretudo modelos de ponta de pulverização e condições de pressão de trabalho. Desta forma, o objetivo deste trabalho foi avaliar quanto os modelos
Arq. Inst. Biol.. Publicado em: 02/12/2019
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12. FIPLIQ: an alternative solution for gynecological and oral cytology
RESUMO Introdução: A citologia em meio líquido foi desenvolvida para melhorar o teste de Papanicolaou. Alguns meios líquidos são comercialmente disponíveis, no entanto, devido ao alto custo, há dificuldades para sua implementação em programas de saúde pública em muitos países. Objetivos: Estudar a adequabilidade de meios líquidos alternativos
J. Bras. Patol. Med. Lab.. Publicado em: 11/11/2019