Tlc Ir
Mostrando 1-12 de 14 artigos, teses e dissertações.
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1. BIODIESEL SYNTHESIS FROM WASTE COOKING OIL USING A VARIETY OF WASTE MARBLE AS HETEROGENEOUS CATALYSTS
Abstract The research article is based on biodiesel synthesis by the transesterification of waste cooking oil with methanol in the presence of heterogeneous catalysts prepared from different marble. Eight samples of marble were successfully converted into potential catalysts by calcination. The thermal treatment of waste marbles at 300oC-1000oC converted the
Braz. J. Chem. Eng.. Publicado em: 13/01/2020
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2. Efficacy of application of Equisetum pyramidale Goldm. hydrogel for tissue restoration of induced skin lesions in Wistar rats
Resumo As plantas medicinais, como E. pyramidale, são uma alternativa para combater infecções e ajudar o processo de cicatrização de feridas. Avaliar os efeitos do hidrogel de E. pyramidale na cicatrização de feridas cutâneas em modelos animais através de análises morfológicas, morfométricas e histológicas, bem como para elucidar os principais c
Braz. J. Biol.. Publicado em: 09/05/2019
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3. Forced degradation of gliquidone and development of validated stability-indicating HPLC and TLC methods
Forced degradation studies of gliquidone were conducted under different stress conditions. Three degradates were observed upon using HPLC and TLC and elucidated by LC-MS and IR. HPLC method was performed on C18 column using methanol-water (85:15 v/v) pH 3.5 as a mobile phase with isocratic mode at 1 mL.min-1 and detection at 225 nm. HPLC analysis was applied
Braz. J. Pharm. Sci.. Publicado em: 29/11/2018
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4. Characterization of additives in NR formulations by TLC-IR (UATR)
Abstract It is a well-established fact that rubber accelerator is essential to provide solution in different sectors. However, there is a reversal process which can reduce the material performance. Sulfur accelerators donors and organic peroxides have been presented as a solution to the problem. The methodology development that can separate or characterize
Polímeros. Publicado em: 10/07/2018
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5. TLC/IR (UATR) off-line coupling for the characterization of additives in EPDM rubber compositions
Abstract The knowledge of the components that constitutes a rubber composition is important to justify the properties of the final device, particularly when it comes to elastomeric compositions used in the aerospace industry. The development of methodologies that can detect components, specially the smallest proportion of the rubbers composition is a constan
Polímeros. Publicado em: 04/03/2016
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6. Separação e identificação de aditivos em tinta por TLC-IR/ UATR e extração seletiva
Resumo Vários aditivos são incorporados nas formulações de tintas para evitar defeitos no revestimento e melhorar o desempenho nas aplicações, constituindo, desse modo, um sistema complexo. A caracterização de uma composição pode ser realizada por separações física/ química e técnicas analíticas instrumentais. A análise de multicomponentes �
Polímeros. Publicado em: 19/01/2016
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7. In vitro Anticancer Property of Yellow Pigment fromStreptomyces griseoaurantiacus JUACT 01
ABSTRACT Despite the complications in isolation of pigments, microbial pigments are increasingly gaining the attention of researchers because of their broad range therapeutic potentials, especially against cancer. In this study the cytotoxic and anti proliferative potentials of yellow pigment from Streptomyces griseoaurantiacus JUACT 01 isolated from soil ar
Braz. arch. biol. technol.. Publicado em: 2015-12
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8. Ulcer protective potential of standardized hesperidin, a citrus flavonoid isolated from Citrus sinensis
Free radicals play an important role in stomach ulcer formation. The present investigation validates the anti ulcer activity of hesperidin, isolated from Citrus sinensis (L.) Osbeck, Rutaceae, through the assessment of its antioxidant potential over stomach mucosal tissue by histological examination. Hesperidin was isolated from the dried peel of C. sinensis
Rev. bras. farmacogn.. Publicado em: 2014-06
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9. Production and characterization of surface-active compounds from Gordonia amicalis
Two methods were used to make crude preparations of surface-active compounds (SACs) produced by Gordonia amicalis grown on the medium containing 1% diesel oil. Using a 2:1 (v/v) solution of chloroform:methanol for extraction, Type I SACs were isolated and shown to produce oil in water (O/W) emulsions. Type II SACs were isolated by precipitation with ammonium
Braz. arch. biol. technol.. Publicado em: 2014-02
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10. Síntese da fenitoína assistida por micro-ondas: proposta de aula prática para alunos de graduação
Microwave synthesis is considered a breakthrough in the field of chemistry due to its benefits over conventional heating methods. We describe, for the first time, the total synthesis of phenytoin adapted for a microwave reactor, proposed as an experiment for undergraduate courses. When carried out with microwaves, the synthetic route provided phenytoin in 6
Quím. Nova. Publicado em: 2012
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11. Atividade de constituintes micromoleculares de Renealmia alpinia (Rottb.) Maas (Zingiberaceae) sobre Leishmania (Leishmania) chagasi
Leishmaniasis is a complex of tropical disease caused by protozoa belonging to the genus Leishmania and it is among the six most important endemic diseases in the world. Its clinical manifestations can vary from benign cutaneous injuries to the disfiguring and destructive mucosal lesions or to the visceral form, fatal if not treated. Its incidence has increa
Publicado em: 2009
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12. Estudo químico e avaliação do potencial farmacológico e herbicida de Maytenus imbricata Mart. ex. Reissek
In this work, it was studied leaves, branches and seeds of Maytenus imbricata, whose chemical constitution and activities pharmacological until this moment had not been reported in literature. From Maytenus imbricata leaves and branches hexane extracts were isolated and identified 3-oxo-lup-20(29)-en-30-al, 30-hydroxy-lup-20(29)-en-3-one, 11 -hydroxy-lup-20(
Publicado em: 2007