![]() ![]() The impact of biopreservatives and storage temperature in the quality and safety of minimally processed mixed vegetables for soup. Extending and measuring the quality of fresh-cut fruit and vegetables: A review. Alternative sanitization methods for minimally processed lettuce in comparison to sodium hypochlorite. Resistance and adaptation to food antimicrobials, sanitizers, and other process controls. Efficacy of washing and sanitizing methods. Factors affecting quality and safety of fresh-cut produce. Fresh fruit and vegetables as vehicles for the transmission of human pathogens. UNICAM HELIOS ALPHA SERVICE MANUAL FREEBiological activities of Portuguese propolis: Protection against free radical-induced erythrocyte damage and inhibition of human renal cancer cell growth in vitro. The potential use of propolis as a cariostatic agent and its actions on mutans group streptococci. ![]() Hepatoprotective and anti-Helicobacter pylori activities of constituents from Brazilian propolis. Antioxidant properties, total phenols and pollen analysis of propolis samples from Portugal. Beneficial effects of propolis on human health and neurological diseases. Historical aspects of propolis research in modern times. Antibacterial, antifungal, antiamoebic, antiinflammatory and antipyretic studies on propolis bee products. Propolis: Recent advances in chemistry and plant origin. The authors declare no conflict of interest. The following terms were used for frequency classes: predominant pollen (PP, more than 45% of pollen grains counted), secondary pollen (SP, 16%–45%), important minor pollen (IMP, 3%–15%) and minor pollen (MP, 1%–3%). A reference collection of CIMO-Mountain Research Centre (Agricultural College of Bragança) and different pollen morphology guides were used for the recognition of the pollen types. Pollen grain identification was performed by optical microscope with total magnification (400× and 1000×). Then acetolysis was applied, and two additional microscope slides were prepared using glycerin jelly, one stained with basic fuchsine and the other without stain. In this stage, three propolis microscope slides were mounted with sediment obtained after centrifugation (10,000× g for 1 min) for observation of plant trichomes and other organic residues that may be destroyed in sequence. Next, the sediment was treated with KOH (10%), sonicated for 15 min and sieved through a 20 mesh stainless steel screen to eliminate large fragments. In brief, 0.5 g of scraped propolis was extracted overnight with ethanol. Palynological processing of the samples followed the standard methodology, described in detail previously. Indeed, the composition of propolis is highly variable due to the diversity of plants around the hive from which the bees collect the exudates. These differences are due to different botanical and geographical origins. Concerning the waxes and the soluble solids, the first were higher and the second were much lower than those obtained in the present study. ![]() obtained similar values for moisture and ash, even though great differences were found among the Brazilian samples studied. , who studied propolis samples from four different cities of Portugal. These results are corroborated by the values obtained by Dias et al. The values obtained in the present study for the physicochemical parameters are presented in Table 2. More recently, however, parameters like moisture, insoluble and soluble substances, pH, conductivity, ash and waxes have received attention. ![]() Studies concerning the physicochemical characteristics of propolis have often focused on the presence of polyphenols and flavonoids. ![]()
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