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Comparison of the free radical-scavenging activity of propolis from several regions of Argentina.
It was observed that all samples of ethanolic extracts of propolis showed free radical-scavenging activity in terms of scavenging of the radical DPPH but the highest activities were found for samples from Tucumán and Santiago del Estero, which may justify their use as a source of natural antioxidants. Expand
Physico chemical and bioactive properties of honeys from Northwestern Argentina
The results showed that the honeys had good properties of stability and freshness, and the antioxidant and antimicrobial properties found in honeys from the Argentinean Northwest make them products of high added value and excellent quality. Expand
Evaluation of antioxidant capacity, genotoxicity and polyphenol content of non conventional foods: Prosopis flour
Fruits such as Prosopis pod have been food sources (patay, arrope, chicha or aloja) of inhabitants of arid and semi-arid lands in South America. The aims of the present study were determine someExpand
Screening of antibacterial activity of Amaicha del Valle (Tucumán, Argentina) propolis.
Thin layer chromatographic (TLC) separation profiles of propolis from Amaicha del Valle region were similar but differ from the alcoholic extract from Cerrillos, another phytogeographical region of Argentina (provincia chaqueña), andBioautographic assays of the TLC profiles showed that several separated compounds of the Amaica Del Valle propolis have antibacterial activity. Expand
Essential groups at the active site of Trapaeolum invertase
Abstract Amino acid residues involved at the active site of Tropaeolum majus invertase (β- d -fructofuranoside fructohydrolase, EC were determined. Photo-oxidation and Woodward's reagent KExpand
Antioxidant activity of Argentine propolis extracts.
The results justify the use of propolis (groups I and II) as a source of natural antioxidants as a result of its possible protective action against oxidative modification of lipid in unfractionated serum. Expand
Standard methods for Apis mellifera propolis research
An overview of the available methods for studying propolis in different aspects are given: propoli in the bee colony; chemical composition and plant sources of propolis; biological activity of propoli with respect to bees and humans; and approaches for standardization and quality control for the purposes of industrial application. Expand
Antimicrobial activity of selected plant species from "the Argentine Puna" against sensitive and multi-resistant bacteria.
The presence of antibacterial activity in Puna plant extracts against multi-resistant bacteria give support to their traditional use for treating conditions associated with microorganisms in humans and animals and consequently seems promising for the treatment of multi- resistant bacteria. Expand
Antibacterial activity of ethanolic and aqueous extracts of Acacia aroma Gill. ex Hook et Arn.
Leaf fluid extracts tended to be the most potent, followed by flower fluid extracts, and minimal bactericidal concentration values were identical or twice as high than the corresponding MIC for leaf extracts and four or eight times higher than MIC values for flower extracts, which may indicate a bactericidal effect. Expand
Chemical and functional characterization of seed, pulp and skin powder from chilto (Solanum betaceum), an Argentine native fruit. Phenolic fractions affect key enzymes involved in metabolic syndrome
The powders from the three parts of S. betaceum fruit may be a potential functional food and the polyphenol enriched extract of seed and skin may have nutraceutical properties. Expand