فهرست مطالب alireza sadeghi mahounak

Recently, the beneficial effects of the plants' secondary compounds for the treatment and improvement of diseases have been strongly interested. This study was conducted in a completely randomized design with three replications in the Paveh and Ormanat region of Kermanshah province. For this purpose, after studying the flora of the region, 10 high-widespread families (Apiaceae, Boraginaceae, Lamiaceae, Rosaceae, Solanaceae, Polygonaceae, Fabaceae, Brassicaceae, Liliaceae, and Asteraceae) were selected. In each case, three plant species with three replications were identified and randomly collected during flowering from April to September. Antioxidant potentials of the samples were evaluated by four methods of DPPH, FRAP, ABTS, and TAC. Results of analysis of variance showed significant differences between measured traits in plant species as well as plant family with 99% confidence. Among the studied plants, Pimpinella kotschyana Boiss. from Apiaceae, Bellevalia dichroa Hausskn. from Liliaceae, Muscari neglectum Guss, from Liliaceae showed the highest antioxidant activities using different methods. Results also showed that among the studied plant families, Liliaceae, Rosaceae, Brassicaceae, and Asteraceae showed considerable antioxidant potential and could be noticed in future research.

Considering the importance of quality and bacterial contamination in food products، a rapid، accurate and able method to deliver consistent results for counting bacteria is an essential. Application of image processing in the measurement of quality is one of important research topics. This method is very accurate and non-destructive with constant results. The aim of this study was the use of image processing in bacterial count (Quail flora، sourdough and drinks kefir) and comparison with Colony Counter method. First، of intestinal microbial flora Quail، sourdough and drink kefir، Dilutions were prepared from 10 -1 to 10-9. Then respectively in plate count agar، YGC agar and MRS agar were cultured surface (Quail flora and lactic acid bacteria in drink kefir at 37 ° C and yeast in sourdough at 25 °C). After 24 hours، colonies grown by Colony Counter and Image J software were counted in triplicate. The results showed that in dilutions of 10-5 to 10-9، don’t difference between the numbers reported by the two methods but in dilutions of 10 -1 to 10-4، there were significant difference between the numbers reported by the two methods. According to the results of this research can be introduced image processing an accurate and rapid method for bacterial count.