29 documents found, page 1 of 3

Chemical composition and efficacy of dichloromethane extract of Croton sphaerog...

Made available in DSpace on 2022-04-28T18:58:08Z (GMT). No. of bitstreams: 0 Previous issue date: 2013-02-18; The cattle tick Rhipicephalus microplus is widely distributed in tropical and subtropical regions, causing high economic impact on cattle production. The control of tick infestations is regarded worldwide as critical and has been based on the use of organophosphates, synthetic pyretroids, amitraz and re...

Photoprotective activity of geopropolis produced by Melipona subnitida (Apidae,...

Although geopropolis has been the subject of many chemical and pharmacological studies, there are few studies investigating the photoprotective activity of formulations containing propolis. Thus, we investigated in vivo the photoprotective efficacy of the cream containing geopropolis extract by macroscopic and histological evaluation of the skin of Wistar rats subjected to ultraviolet radiation (UVB). We also e...

Accessible Methodologies for Quantification of Flavonoids and Total Phenols in ...

Made available in DSpace on 2021-06-25T12:39:08Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-01-01; Propolis is widely known for its important therapeutic activities. In its chemical constitution, there are several classes of secondary metabolites, such as simple phenols, carboxylic and cinnamic acids, coumarins, tannins and flavonoids. However, flavonoids, an important class of secondary metabolites,...

Propolis obtained in a clearing inside the Atlantic Forest in Ubatuba (São Paul...

Fingerprinting of cerrado species based on cork lipophilic constituents

Made available in DSpace on 2020-12-10T17:29:43Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-02-01; Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP); Cerrado is a savanna ecosystem of central and southeastern Brazil. Many woody species of cerrado have thick layers of cork. The present work aimed to characterize, by GC/MS analysis, the constituents of n-hexane extracts from the cork of com...

Bauer-7-en-3b-yl acetate: a major constituent of unusual samples of Brazilian p...

The pentacyclic triterpenoid bauer-7-en-3b-yl acetate was obtained from the chloroform extract of an unusual sample of propolis from southeast Brazil with the yield of 7%. The compound was identified by comparison of IR, MS and NMR analysis with published data.

Seasonal variation, chemical composition and antioxidant activity of brazilian ...

Total phenolic contents, antioxidant activity and chemical composition of propolis samples from three localities of Minas Gerais state (southeast Brazil) were determined. Total phenolic contents were determined by the Folin–Ciocalteau method, antioxidant activity was evaluated by DPPH, using BHT as reference, and chemical composition was analyzed by GC/MS. Propolis from Itapecerica and Paula Cândido municipalit...

TLC Procedure for Determination of Approximate Contents of Caffeine in Food and...

Flavonoids and antioxidant potential of nine Argentinian species of Croton (Eup...

A simple and inexpensive procedure for detection of a marker of Brazilian alecr...