Crude Extracts
Mostrando 13-24 de 1419 artigos, teses e dissertações.
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13. Brazilian stingless bee propolis and geopropolis: promising sources of biologically active compounds
ABSTRACT Stingless bee products such as honey, pollen, propolis, and geopropolis have been used for centuries in traditional medicine for the treatment of several illnesses. Investigation of the biological activity of stingless bee products, especially propolis and geopropolis, has revealed promising therapeutic properties. About 20% of total Neotropical sti
Rev. bras. farmacogn.. Publicado em: 26/08/2019
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14. Determination of phenolic profile by HPLC–ESI-MS/MS, antioxidant activity, in vitro cytotoxicity and anti-herpetic activity of propolis from the Brazilian native bee Melipona quadrifasciata
ABSTRACT Propolis is a rich source of bioactive molecules made by bees by collecting an infinite variety of secondary metabolites from plants. This study determined the chromatographic and mass spectrometry profile along with the biological activity of propolis produced by the native Brazilian bee Melipona quadrifasciata. A hydroalcoholic crude extract was p
Rev. bras. farmacogn.. Publicado em: 26/08/2019
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15. Chemical Constituents and Pharmacology properties of Aristolochia triangularis: a south brazilian highly-consumed botanical with multiple bioactivities
Abstract: Aristolochia triangularis Cham., is one of the most frequently used medicinal plant in Southern Brazil. Preparations containing the leaves and/or stems are traditionally used as anti-inflammatory, diuretic, as well as antidote against snakebites. This study screened A. triangularis extracts, fractions and isolated compounds for different bioactivit
An. Acad. Bras. Ciênc.. Publicado em: 12/08/2019
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16. DIGESTIBILIDADE E PALATABILIDADE DE DIETAS COM EXTRATO DE PRÓPOLIS PARA CÃES
Resumo O objetivo do estudo foi avaliar o efeito da inclusão de extrato de própolis na digestibilidade e na palatabilidade de dietas para cães. Foram realizados dois experimentos, sendo o primeiro constituído por um ensaio de digestibilidade, com a inclusão de diferentes extratos de própolis (FT0,55, FT0,59, FT2,59, FT2,11). Com base nos resultados do
Ciênc. anim. bras.. Publicado em: 20/05/2019
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17. Supplementation of Natural Antioxidants to Reduced Crude Protein Diets for Japanese Quails Exposed to Heat Stress
ABSTRACT The study aimed at comparing the effects of the supplementation of natural antioxidant sources to a reduced crude protein diet on the performance, carcass traits, blood parameters, liver antioxidant enzyme activities and meat lipid peroxidation of Japanese quails exposed to heat stress. A total of 640 14-day-old male Japanese quails were exposed to
Braz. J. Poult. Sci.. Publicado em: 18/04/2019
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18. Exploring the Insecticide and Acaricide Potential of Development Regulators obtained from Restinga vegetation from Brazil
Abstract: As a part of our continuing search for insect and arthropod development regulators from Brazilian restinga vegetation of the Rio de Janeiro State, crude extracts, purified fractions and essential oils were submitted to screening tests seeking for biological activities on the development of the insects Rhodnius prolixus, Dysdercus peruvianus, Oncope
An. Acad. Bras. Ciênc.. Publicado em: 08/04/2019
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19. Phenolic compounds from Virola venosa (Myristicaceae) and evaluation of their antioxidant and enzyme inhibition potential
Resumo Virola venosa, popularmente conhecida como ucuuba-da-mata, ocorre naturalmente na região amazônica e tem potencial para fornecer compostos naturais úteis, como já foi mostrado para outras espécies de Virola. Por isso, o objetivo deste estudo foi determinar a composição química dos extratos do tronco e das folhas de V. venosa e os possíveis po
Acta Amaz.. Publicado em: 2019-03
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20. Brown Stink Bug Mortality by Seed Extracts of Tephrosia Vogelii Containing Deguelin and Tephrosin
ABSTRACT Extracts of the seeds of Tephrosia vogelii Hook. f. were studied in relation to its chemical composition and toxicity to the brown stink bug Euschistus heros (F.). The extracts were obtained in ethyl acetate and ethanol in the sequence according to the polar nature of the solvents. Extracts were sprayed in concentration of 1.0, 2.5, 5.0, 7.5 and 10%
Braz. arch. biol. technol.. Publicado em: 29/11/2018
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21. A study of the phytotoxic effects of the aerial parts of Senecio westermanii Dusén (Asteraceae) on Lactuca sativa L. and Allium cepa L. seeds
The objective of this study was to evaluate the effects of the ethanolic crude extracts and fractions of the species Senecio westermanii Dusén on Lactuca sativa L. (lettuce) and Allium cepa L. (onion) seeds. We assessed the germination, growth, root respiration and photosynthesis of the target species in Petri dishes (9.0 cm diameter) containing filter pape
Braz. J. Pharm. Sci.. Publicado em: 29/11/2018
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22. Comparison of bioactive compounds content in leaf extracts of Passiflora incarnata, P. caerulea and P. alata and in vitro cytotoxic potential on leukemia cell lines
ABSTRACT Passiflora caerulea L., P. alata Curtis and P. incarnata L. (synonym for P. edulis Sims), are the most popular representatives of the Passiflora genus in South America. In recent years, a growing attention is paid to the biological activity and phytochemical profiles of crude extracts from various species of Passiflora in worldwide. The aim of this
Rev. bras. farmacogn.. Publicado em: 2018-04
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23. Nitric oxide inhibitory and anti-Bacillus activity of phenolic compounds and plant extracts from Mesua species
ABSTRACT Species from the genus Mesua, Calophyllaceae, are rich source for phenolic compounds such as coumarin xanthone, and benzophenone derivatives. An investigation on the potential biologically active phenolic compounds 1–5 and crude extracts from the stem bark of Mesua hexapetala (Hook. f.) P.S. Ashton and Mesua beccariana (Baill.) Kosterm. for nitric
Rev. bras. farmacogn.. Publicado em: 2018-04
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24. Mentha pulegium crude extracts induce thiol oxidation and potentiate hemolysis when associated to t-butyl hydroperoxide in human’s erythrocytes
ABSTRACT Mentha pulegium (Lamiaceae) tea has been used as a traditional medicine; however, the modulatory effect of M. pulegium extracts on damage to human erythrocytes associated to t-butyl hydroperoxide (t-BHP) exposure remains to be investigated. Accordingly, we perform this study in order to test the hypothesis that aqueous and ethanolic extracts of M. p
An. Acad. Bras. Ciênc.. Publicado em: 11/12/2017