Chemical Constituents
Mostrando 13-24 de 470 artigos, teses e dissertações.
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13. In vitro anti-aging activities of ginkgo biloba leaf extract and its chemical constituents
Abstract To determine in vitro anti-aging activity and identify the active chemical constituents in Ginkgo leaf extracts. The antioxidant properties of Ginkgo biloba leaves extracts were evaluated using 1,1-diphenyl-2-picrylhydrazyl radical (DPPH) scavenging and 2,2’-azino-bis (3-ethylbenzothiazoline)-6 sulfonic acid radical (ABTS) scavenging assays. The i
Food Sci. Technol. Publicado em: 2020-06
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14. USE OF PAPER SPRAY-MASS SPECTROMETRY TO DETERMINE THE CHEMICAL PROFILE OF RIPE BANANA PEEL FLOUR AND EVALUATION OF ITS PHYSICOCHEMICAL AND ANTIOXIDANT PROPERTIES
In this work, the peels of ripe banana (Musa sp.), variety “Prata”, were used to prepare a flour, which was evaluated for its physicochemical characteristics and antioxidant activity. The characterization of its chemical profile was performed by a fast and simple method: paper spray-mass spectrometry. This flour had high carbohydrate content and total di
Quím. Nova. Publicado em: 2020-05
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15. PHYTOCHEMICAL AND BIOLOGICAL STUDIES OF CONSTITUENTS FROM ROOTS OF Salacia crassifolia (CELASTRACEAE)
Salacia crassifolia traditionally known as “Bacupari-do-Cerrado” is used to treat kidney problems, and as a healing agent for coughs and malaria. The phytochemical study of the S. crassifolia roots led to the isolation of thirteen compounds: abruslactone-A (1), urs-12-ene-3β,25,30-triol (2), carioprystimerin (3), β-sitosterol (4), pristimerin (5), disp
Quím. Nova. Publicado em: 2020-05
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16. Study of Thermoplastic Extrusion and Its Impact on the Chemical and Nutritional Characteristics and Two Sorghum Genotypes SC 319 and BRS 332
The use of sorghum in human nutrition has been expanded due to its nutritional composition and its functional potential. Extrusion has been used to improve the quality of sorghum. The aim of this work was to assess the effect of extrusion in the nutritional composition, phenolic compounds content of two sorghum, and characterize the profile of chemical const
J. Braz. Chem. Soc.. Publicado em: 2020-04
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17. CHEMICAL CONSTITUENTS OF Sinningia mauroana AND SCREENING OF ITS EXTRACTS FOR ANTIMICROBIAL, ANTIOXIDANT AND CYTOTOXIC ACTIVITIES
Phytochemical study of aerial parts from Sinningia mauroana Chautems (Gesneriaceae) yielded 17 known compounds: sitosterol, stigmasterol, betulinic acid, oleanolic acid, hederagenin, maslinic acid, ursolic acid, pomolic acid, soranjidiol, methyl 4-hydroxyphenylacetate, 6-hydroxy-7-methoxy-α-dunnione, 7-hydroxy-6-methoxy-α-dunnione, jacaranone, calceolarios
Quím. Nova. Publicado em: 2020-02
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18. VALORIZATION OF Solanum viarum DUNAL BY EXTRACTING BIOACTIVE COMPOUNDS FROM ROOTS AND FRUITS USING ULTRASOUND AND SUPERCRITICAL CO2
Abstract Solanum viarum Dunal belongs to the Solanaceae family and it is considered to be a grazing weed toxic to cattle. In this study, ultrasound-assisted extraction (UAE) and supercritical CO2 extraction (SFE-CO2) were applied to evaluate the extraction yield and chemical composition of fruits and roots matrices of Solanum viarum Dunal. A hydroalcoholic s
Braz. J. Chem. Eng.. Publicado em: 13/01/2020
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19. Chemical and structural composition of black pigmented supragingival biofilm of bovines with periodontitis
RESUMO: A periodontite bovina é uma infecção multifatorial associada primariamente à microbiota potencialmente patogênica presente no biofilme bucal. Biofilmes são estruturas organizadas, nas quais os constituintes convivem em simbiose, descritos em outras espécies como um fator predisponente à periodontite. O objetivo do presente estudo foi caracter
Pesq. Vet. Bras.. Publicado em: 10/01/2020
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20. Composition, antioxidant properties, and biological activities of the essential oil extracted from Ocotea diospyrifolia (Meisn.) Mez.
The article has aimed to characterize the essential oil extracted from Ocotea diospyrifolia (Meisn.) Mez. leaves, in terms of its chemical composition and antioxidant, hemolytic, and phytotoxic potentials, as well as its toxicity against Artemia salina. The major constituents identified by CG-MS were d-elemene, spathulenol, and b-atlantol. When screened for
Braz. J. Pharm. Sci.. Publicado em: 20/12/2019
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21. Chemical composition and bioactivity of methanolic extract obtained from Lepista sordida
The present study aimed at the evaluation of chemical composition and bioactive potential of methanolic extract obtained from Lepista sordida in terms of antioxidative and antimicrobial efficacy. The macrofungus is recognized for its high nutritional value and medicinal properties. However, to the best of our knowledge bioactivity of its methanolic extract i
Braz. J. Pharm. Sci.. Publicado em: 20/12/2019
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22. Chemical constituents from the fruits of Schisandra sphenanthera and their cytotoxicity activity
Abstract Schisandra sphenanthera Rehder & E.H. Wilson, Schisandraceae, is well known as a type of traditional medicine for the treatment of hepatitis, diarrhea and insomnia in Asia. It was also reported to have antiviral and anti-HIV activities. Using various chromatographic resins and isolation techniques, a new lignan (1), erythro-4-(3,4-dimethoxyphenyl)-4
Rev. bras. farmacogn.. Publicado em: 09/12/2019
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23. Cichorium intybus from India: GC-MS Profiling, Phenolic Content and in vitro Antioxidant Capacity of Sequential Soxhlet Extracted Roasted Roots
Abstract Research on the bio-activities and chemical composition of roasted C. intybus roots from India is very little. In present studies GC-MS analysis of volatile components of roasted C. intybus roots, phenolics and flavonoid content estimation and antioxidant potential of roasted C. intybus roots was carried out. Antioxidant potential was also evaluate
Braz. arch. biol. technol.. Publicado em: 25/11/2019
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24. Emerging Contaminants in Trans-American Waters
Resumo O desenvolvimento industrial gerou novos produtos para facilitar a vida das pessoas. Itens como alimentos, higiene, cuidados pessoais e produtos de saúde, entre outros, são processados, vendidos e consumidos diariamente por todas as faixas etárias. Esses produtos incluem em sua formulação produtos químicos orgânicos e inorgânicos com o objetiv
Rev. Ambient. Água. Publicado em: 25/11/2019