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Mostrando 1-12 de 244 artigos, teses e dissertações.
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1. SUPERCRITICAL EXTRACTION OF LYOPHILIZED STRAWBERRY ANTHOCYANINS WITH PULSED ELECTRIC FIELDS PRETREATMENT
The lyophilized strawberry anthocyanins were extracted using a supercritical extraction (SE) process. The effect of pulsed electric fields (PEF) as pretreatment and the influence of the addition of ethanol as a cosolvent on the percentage of extraction yield (EY) and the total anthocyanin concentration (TAC) were analyzed. The effect of PEF was evaluated at
Química Nova. Publicado em: 2022
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2. Evaluation of the dosimetry and centralization of scout-view function in CBCT
Resumo Este estudo avaliou a centralização da região de interesse (ROI) na aquisição das imagens de TCFC, quando a função scout-view (SV) posicionável livremente é aplicada. Adicionalmente, a dosimetria das imagens adquiridas foi avaliada isoladamente na presença da função SV, bem como após aquisição de imagem tomográfica completa em dois dif
Brazilian Dental Journal. Publicado em: 2022
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3. A Simple Approach to Analyze Sugar Nectar Composition in Flowers Using Capillary Electrophoresis and Enzymatic Assays
Despite the obvious importance of nectar, the composition of this solution remains surprisingly understudied to most of the flowers. Here we describe a simple, low-cost, and reliable methodology to analyze the three main sugars present in 210 nectar samples of Christmas Bellflowers using capillary electrophoresis (CE) and enzymatic assays. CE separation (-16
J. Braz. Chem. Soc.. Publicado em: 2020-10
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4. The Surface Treatment of Niobium Superconducting Reentrant Cavities by Means of High Temperature Nitrogen Plasma Based Ion Implantation
High Temperature Nitrogen Plasma Based Ion Implantation (HT-NPBII) has been used to treat the surface of niobium superconducting reentrant cavities, which are part of parametric transducers in a resonant-mass gravitational wave detector. The aim is to enhance the corresponding electrical quality factors (Q-factors) which are closely related with the increase
Mat. Res.. Publicado em: 13/12/2019
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5. Development of a generic method for the determination of proton-pump inhibitors by capillary zoneelectrophoresis
A generic capillary zone electrophoresis method was developed for the analysis of four proton pump inhibitors: omeprazole, pantoprazole, lansoprazole and rabeprazole. During preliminary analysis screening of phosphate buffers at different pH levels was performed, in order to determine the optimum pH domain suitable for the simultaneous determination of all s
Braz. J. Pharm. Sci.. Publicado em: 30/09/2019
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6. A NEW VALIDATED METHOD FOR DETERMINATION OF ROFLUMILAST IN TABLET BY CZE-UV
This paper reports a new and validated capillary electrophoresis method to determine Roflumilast (RFL) with an internal standard in tablet. The separation was made on an uncoated fused-silica capillary column 50 cm effective length and 75 µm i.d. 20 mmol L-1 of Na2B4O7 buffer including 15% (v/v) methanol (pH=9.5) was used as background electrolyte. A potent
Quím. Nova. Publicado em: 18/07/2019
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7. Preparação de membranas de PHB por eletrofiação e caracterização para aplicações em engenharia tecidual
RESUMO Este trabalho tem como objetivo a preparação de mantas compostas por fibras do polímero biodegradável poli(3-hidroxibutirato) -(PHB) por meio da técnica de eletrofiação. Obtiveram-se mantas sob diferentes condições, variando-se o fluxo, a temperatura da solução, a tensão aplicada e a adição de um agente surfactante. O material obtido foi
Matéria (Rio J.). Publicado em: 06/12/2018
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8. Growth and production of volatile compounds of yarrow (Achillea millefolium L.) under different irrigation depths
Abstract Yarrow (Achillea millefolium L., Asteraceae) is an important medicinal plant used worldwide for its medicinal properties such as the analgesic, antioxidant and anti-inflammatory ones. The aim of this study was to evaluate the growth and production of photosynthetic pigments and of volatile constituents of Achillea millefolium L. under different irri
An. Acad. Bras. Ciênc.. Publicado em: 01/11/2018
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9. Changes in the crystalline degree in neutron irradiated EPDM viewed through infrared spectroscopy and inelastic neutron scattering
ABSTRACT The changes in the degree of crystallinity in commercial Ethylene Propylene Diene rubber-type M (EPDM) irradiated with neutrons at different doses has been studied by means of inelastic neutron scattering and infrared absorption spectroscopy experiments. EPDM samples were taken from the housing of non-ceramic electrical insulators which are used in
Matéria (Rio J.). Publicado em: 19/07/2018
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10. Operational conditions of an electrostatic separator for concentrate copper from electronic waste
Abstract Interest in recycling for the recovery of valuable substances, such as precious metals from electric and electronic waste has been increasing year after year due to the large amount present in such waste compared to primary sources. There is environmental concern, since the amount of this kind of waste is increasing due to rapid technological advanc
REM, Int. Eng. J.. Publicado em: 2018-07
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11. Potencial Eólico em Girau do Ponciano, Alagoas Através de Dados Anemométricos e Modelagem em Microescala
Resumo O potencial eólico na região Agreste do Nordeste Brasileiro (NEB) tem características positivas para geração elétrica, cuja exploração ainda é pouca explorada. Este trabalho analisa uma base de dados anemométricos com 3,1 anos de duração (outubro de 2007 a outubro de 2010), coletados em Girau do Ponciano, Alagoas. Foram definidos três per
Rev. bras. meteorol.. Publicado em: 2018-06
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12. Colored shade nets induced changes in growth, anatomy and essential oil of Pogostemon cablin
ABSTRACT The purpose of this investigation was to determine the influence of colored shade nets on the growth, anatomy and essential oil content, yield and chemical composition of Pogostemon cablin. The plants were cultivated under full sunlight, black, blue and red nets. The harvesting was performed 5 months after planting and it was followed by the analysi
An. Acad. Bras. Ciênc.. Publicado em: 16/04/2018