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Articles by Ahmet Altindisli
Total Records ( 2 ) for Ahmet Altindisli
  Arif Atak , Ahmet Altindisli and Zekiye Goksel
  Grapes (Vitis vinifera L.) are believed to have health benefits due to their antioxidant activity and polyphenols. Thus scientists have conducted research to explore their positive effects on many chronic diseases. However, the phenolic content is variable depending on grape variety. In this study, we examined the grape hybrids total phenolics and antioxidant activities during the two different harvesting times in 2008 and 2009. Total phenolic content and antioxidant activity of hybrids were significant among hybrids for both years. However, the relationship between different harvest times was not significant. In 2008 KXP-10 hybrid and in 2009 BX2-149 hybrid have shown a higher phenolic and antioxidant activity according to the other varieties. These hybrids have dark berry color and seed. In 2009, hybrids which have seed total phenolic content and antioxidant activity were investigated with seed and without seed. Greater value was obtained hybrids which have analyzed with seed. Before registration 23 different hybrids or variety candidates which were obtained different Institutes were determined total phenolic content and antioxidant content.
  Nur OKUR , Ahmet ALTINDISLI , Muzaffer CENGEL , Selcuk GOCMEZ and Huseyin Husnu KAYIKCIOGLU
  Many recent studies from around the world have compared organic and conventional farming systems in terms of soil properties. Microbial biomass and enzyme activity were compared in vineyard soils managed by organic and conventional practices under Mediterranean conditions during the growing. Organic treatments were (i) green manure and farmyard manure at the rate of 30 t ha-1 (GM1), (ii) green manure and farmyard manure at the rate of 10 t ha-1, plus E2001 EM Bio-polymer gel solution (GM2), and (iii) green manure plus E2001 EM Bio-polymer gel solution (GM3). Only mineral fertilizers and pesticides were used in the conventional system (CONV). Soil organic C and soil microbial biomass C (SMBC), and protease, urease, alkaline phosphatase, and dehydrogenase activity were significantly higher in the organic system than in the conventional system. The ratio of microbial biomass C to total organic C content (Cmic/Corg) was also higher in the organic plots. Total organic C content increased in the organic system by 13%-23% in comparison to the conventional system. Application of GM1 and GM2 resulted in greater microbial biomass and activity, as compared to the other management systems. SMBC was significantly correlated with dehydrogenase, protease, urease, and alkaline phosphatase. These results indicate that organic management positively affected biochemical properties, thus improving soil quality and productivity.
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