Browsing by Author "Yoeruek, I. H."

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Analysis of Sugar Composition in Nut Crops
(Asian Journal of Chemistry, 2008) Kazankaya, Ahmet; Balta, Mehmet Fikret; Yoeruek, I. H.; Balta, F.; Battal, P.
This study evaluated some fruit traits and kernel sugar components in nut crops (pistachio, walnut, hazelnut and almond) collected from different accessions of Turkey. Pistachio varieties had 0.44-0.64 kernel weight and 49.4-59.4 % kernel percentage. Walnut genotypes had 5.80-7.20 g kernel weight and 45.0-46.4 % kernel percentage. Kernel weights and kernel percentages recorded for hazelnut (Tombul var.) and almond (E-1) were 0.98 and 1.14 g and 51.5 and 26.8 %, respectively. Kernel sugar components were detected by using HPLC. Pistachio kernels belonging to different varieties contained 1.13 (Ohadi)-5.04 (Siirt) g/100 g fructose, 1.01 (Siirt) - 4.25 (Kirmizi) g/100 g glucose, 2.58 (Uzun) - 4.74 (Buttum) g/100 g sucrose and 0.26 (Kirmizi) - 0.99 (Halebi) g/100 g maltose. Walnut genotypes contained 0.35-2.67 g/100 g fructose, 0.13-6.26 g/100 g glucose, 1.76-4.17 g/100 g sucrose and 0.23-0.74 g/100 g maltose. Sugar components of hazelnut and almond were 0.80 and 4.00 g/100 g fructose, 1.52 and 0.86 g/100 g glucose, 2.91 and 3.23 g/100 g sucrose, 0.91 and 1.08 g/100 g maltose, respectively. Amounts of sugar components and the mean sugars varied to varieties, genotypes and different accessions.
Characterization of Free Sugars in Hawthorn (Crataegus Spp.) Species
(Asian Journal of Chemistry, 2007) Balta, M. Fikret; Yoeruek, I. H.; Askin, M. A.
Free sugar contents were detected by HPLC in the fruits of 20 genotypes belonging to 5 different species (Crataegus spp.) collected from Malatya (eastern Turkey). The fresh fruits of C. orientalis, C. aronia, C. meyeri, C. tanacetifolia and C. pontica contain in average 1.36-1.84 g/100 g sucrose, 4.18-5.33 g/100 g fructose, 0.42-1.12 g/100 g maltose and 2.58-3.62 g/100 g glucose, respectively. The contents of sucrose, fructose, maltose and glucose did not differ by the species statistically. The main sugar was fructose in all hawthorn species, followed by glucose, sucrose and maltose. The mean percentages of fructose, glucose, sucrose and maltose within the total amount of these 4 sugars were 47.9, 29.4, 15.2 and 7.4 %, respectively. In addition, the species averagely had soluble solids content (SSC) 13.6-17.6 %.
Hplc Determination of Sugar Contents Based on Harvest Season in Almonds [Prunus Dulcis (Mill.) D.a.!webb.]
(Asian Journal of Chemistry, 2007) Balta, M. Fikret; Yoeruek, I. H.; Dogan, A.; Erez, M. E.; Battal, P.
This study presents in comparison with harvest seasons sugar contents in 18 promising almond selections [Prunus dulcis (Mill.) D.A. Webb.] from Balikesir (western Anatolia, Turkey). Their majority had kernel weight over one gram since large kernel is a desired fruit characteristics for almond breeding efforts. Nuts of almond genotypes were collected at two seasons based on their harvest times. The harvest seasons were late August for 8 promising genotypes and early September for other 8 genotypes. Sugar contents were detected by HPLC. Selections harvested in late August and early September averagely contained 2.19-2.31 g/100 g sucrose, 0.68-0.92 g/100 g maltose, 2.09-1.82 g/100 g glucose and 4.08-3.41 g/100 g fructose. Sugar contents of selections did not differ by harvest season statistically. Whereas, significant differences were found among selections for each harvest season. In addition, the mean sugar was fructose in 12 genotypes, sucrose in 4 genotypes and glucose in one genotype.