Browsing by Author "Karakus, S."

Now showing 1 - 2 of 2

Comparison of Contents of Sugars, Organic Acids and Free Amino Acids in Raisins Obtained From Gök Üzüm (Vitis Vinifera L.)
(Hohere Bundeslehranstalt und Bundesamt fur Wein- und Obstbau Klosterneuburg, 2023) Karakus, S.; Ates, F.; Keskin, N.; Turan, M.; Kaya, O.
Raisins are known as an important source of many bioactive compounds such as organic acids, free amino acids, and sugars. In this study, oak ash and potassium carbonate solutions applied before drying were compared for their effects on the Gök Üzüm raisin, more specifically, its contents of organic acids, free amino acids, and sugar profile. The total acidity quantified in the samples of raisin, ranged from 20.30 to 117.08 ng/µL DW for the potassium dipping solution, while values ranged from 17.98 to 164.72 ng/µL DW for the oak ash dipping solution. In samples from either dip solution, serine was predominant, followed by alanine, asparagine, glutamine, aspartate, sarcosine, glutamate, and leucine, whereas gly-cine, arginine, proline, histidine, and valine were found to be the lowest amino acids. In the samples examined, fructose was the most abundant sugar, whereas the lowest sugars in raisins were xylose for oak ash application and galactose for potassium carbonate application. There was wide variation in the sugar profiles for both variants, with values ranging from 3043.48 to 0.71 g/100 g DW. Drying Gök Üzüm grapes after the treatment of oak ash dipping solution promotes a higher content of organic acids, amino acids and sugars as compared to drying after potassium carbonate solution treatments. These results could be used for the development of an attractive pre-drying solution in further studies for the production of both, raisins and perhaps other dried fruits. © 2023, Hohere Bundeslehranstalt und Bundesamt fur Wein- und Obstbau Klosterneuburg. All rights reserved.
Usage of Factor Scores for Determining Relationships Among Body Weight and Some Body Measurements
(Scientific Issues Natl Centre Agrarian Sciences, 2009) Eyduran, E.; Karakus, K.; Karakus, S.; Cengiz, F.
The aim of this study is to estimate weaning weight (WW) using six body measurements (withers height (WH), body length (BL), chest circumference (CC), leg circumference (LC), body depth (BD), and width of chest behind shoulders (WCS)) measured at weaning period by factor scores in multiple regression model. For this aim, a total of 94 Norduz lambs were used. "Kaiser-Meyer-Olkin (KMO) measure of sampling adequacy" and Bartlett's test of sphericity were used to determine whether factor analysis was suitable for data studied. According to results of these criteria, the data was found to be most appropriate for applying factor analysis. Three factors whose eigenvalues greater than 1 were selected as independent variables for multiple regression analysis. It was concluded that that three factors had significant-positive effects on weaning weight and all three factors explained approximately 80% of variation in weaning weight.