Phenol Derivatives
Mostrando 1-12 de 54 artigos, teses e dissertações.
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1. A Theoretical Antioxidant Mechanism for Cytoprotective Effect of p-Acetamide-Salicylate Derivatives against Free Radical Initiator AAPH in Human Erythrocytes
The molecular mechanism of cytoprotective effect on human erythrocytes of aminophenol and salicylates associated derivatives was related to their antioxidant capacity. The oxidative hemolysis induced by water-soluble free-radical initiator 2,2’-azobis-(2-amidine-propane)-dihydrochloride (AAPH) was inhibited by drug candidates named benzaminophen (BZL), sal
J. Braz. Chem. Soc.. Publicado em: 2021-07
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2. Cardanols detected in non-polar propolis extracts from Scaptotrigona aff. postica (Hymenoptera, Apidae, Meliponini)
Resumo A própolis elaborada pelas abelhas sem ferrão (Apidae, Meliponini) é um material resinoso extraído de brotos, folhas e exsudatos de plantas, que são misturados com secreções salivares, cera e solo. A espécie Scaptotrigona aff. postica (Latreille, 1807), (Hymenoptera, Apidae, Meliponini), popularmente conhecida como “tubi”, no estado do Mar
Braz. J. Food Technol.. Publicado em: 17/10/2019
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3. Phytochemical screening and antimicrobial activity testing of crude hydroalcoholic extract from leaves of Sphagneticola trilobata (Asteraceae)
RESUMO: Este estudo teve como objetivo realizar a triagem fitoquímica preliminar e testar a atividade antimicrobiana do extrato hidroalcoólico bruto das folhas de Sphagneticola trilobata. A identificação das classes de metabólitos secundários presentes no extrato foi realizada através da cromatografia em camada delgada analítica (CCDA). Para determi
Cienc. Rural. Publicado em: 11/04/2019
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4. Effect of selective β-adrenoceptor blockade and surgical resection of the celiac-superior mesenteric ganglion complex on delayed liquid gastric emptying induced by dipyrone, 4-aminoantipyrine, and antipyrine in rats
There is evidence for participation of peripheral β-adrenoceptors in delayed liquid gastric emptying (GE) induced in rats by dipyrone (Dp), 4-aminoantipyrine (AA), and antipyrine (At). The present study aimed to determine whether β-adrenoceptors are involved in delayed GE induced by phenylpyrazole derivatives and the role of the prevertebral sympathetic ne
Braz J Med Biol Res. Publicado em: 02/02/2016
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5. PYROLIGNEOUS LIQUOR PRODUCED FROM ACACIA MEARNSII DE WILD WOOD UNDER CONTROLLED CONDITIONS AS A RENEWABLE SOURCE OF CHEMICALS
Acacia mearnsii de Wild (black wattle) is one of the most important trees planted in Southern Brazil for tannin extraction and charcoal production. The pyrolysis of the black wattle wood used for obtaining charcoal is performed in brick ovens, with the gas fraction being sent directly into the environment. The present study examines the condensable compounds
Quím. Nova. Publicado em: 2015-09
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6. Evidence for the involvement of peripheral β-adrenoceptors in delayed liquid gastric emptying induced by dipyrone, 4-aminoantipyrine, and antipyrine in rats
Dipyrone (Dp), 4-aminoantipyrine (AA), and antipyrine (At) delay liquid gastric emptying (GE) in rats. We evaluated adrenergic participation in this phenomenon in a study in male Wistar rats (250-300 g) pretreated subcutaneously with guanethidine (GUA), 100 mg·kg−1·day−1, or vehicle (V) for 2 days before experimental treatments. Other groups of animals
Braz J Med Biol Res. Publicado em: 27/09/2013
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7. In vitro evaluation of new terpenoid derivatives against Leishmania infantum and Leishmania braziliensis
The activity of five (1-5) abietane phenol derivatives against Leishmania infantum and Leishmania braziliensis was studied using promastigotes and axenic and intracellular amastigotes. Infectivity and cytotoxicity tests were performed with J774.2 macrophage cells using Glucantime as a reference drug. The mechanisms of action were analysed by performing metab
Memórias do Instituto Oswaldo Cruz. Publicado em: 2012-05
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8. Phenolic derivatives and other chemical compounds from Cochlospermum regium
This study describes the chemical investigation of the ethyl acetate fraction obtained from the hydroethanolic extract of the xylopodium of Cochlospermum regium (Mart. & Schr.) Pilger, which has been associated with antimicrobial activity. Phytochemical investigation produced seven phenol derivatives: ellagic acid, gallic acid, dihydrokaempferol, dihydrokaem
Química Nova. Publicado em: 2012
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9. Solanum campaniforme: chemical constituents, fragmentation study and dereplication by electrospray mass spectrometry (ESI-MS/MS) / Solanum campaniforme: constituintes quÃmicos, estudo de fragmentaÃÃo e desreplicaÃÃo por espectrometria de massas com ionizaÃÃo por electrospray (IES-EM/EM)
Este trabalho descreve o estudo fitoquÃmico de Solanum campaniforme (Solanaceae), visando o isolamento e elucidaÃÃo estrutural de novos constituintes quÃmicos bioativos, bem como o estudo do padrÃo de fragmentaÃÃo por espectrometria de massas seqÃencial com ionizaÃÃo por electrospray (IES-EM/EM) dos alcalÃides obtidos. A investigaÃÃo quÃmica re
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/11/2011
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10. Phenylpyrazolone derivatives inhibit gastric emptying in rats by a capsaicin-sensitive afferent pathway
Dipyrone (Dp), 4-aminoantipyrine (AA) and antipyrine (At) administered iv and Dp administered icv delay gastric emptying (GE) in rats. The participation of capsaicin (Cps)-sensitive afferent fibers in this phenomenon was evaluated. Male Wistar rats were pretreated sc with Cps (50 mg/kg) or vehicle between the first and second day of life and both groups were
Brazilian Journal of Medical and Biological Research. Publicado em: 2009-11
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11. Rejeito de xisto como adsorvente para remoção de fenol em águas produzidas na indústria de petróleo
Produced water is the main effluent linked to the activity of extraction of oil and their caring management is necessary due to the large volume involved, to ensure to minimize the negative impacts of discharges of these waters in the environment. This study aimed to analyze the use of retorted shale, which is a reject from the pyrolysis of pirobituminous sh
Publicado em: 2009
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12. Estudo termodinamico do equilibrio liquido-liquido visando a remoção do enxofre do oleo diesel com liquidos ionicos / Thermodynamic study of liquid-liquid equilibrium aiming sulfur removal by using ionic liquids
The sulfur contaminants more difficult to remove from diesel oil by hydrodesulfuration process (HDS) are the sterically hindered aromatic compounds, like dibenzothiophene (DBT), and its alkylated derivatives 4-methyl-dibenzothiophene (4-MDBT) and 4,6-dimethyl-dibenzothiophene (4,6-DMDBT), commonly called DBTs. Increasing the number of methyl groups attached
Publicado em: 2009