Özet: Bu çalışmada, Denizli'nin Güney ilçesinde yetiştirilen Shiraz üzüm çeşidine tane tutumundan hemen sonra uygulanan 4 farklı salkım seyreltmesinin (8, 16, 24 ve 32 salkım/asma) verim ve kalite özellikleri ile tanenin biyokimyasal özellikleri üzerine etkileri incelenmiştir. Ayrıca, tanelerin antioksidan aktiviteleri DPPH, TEAC ve FRAP yöntemlerine göre belirlenerek karşılaştırılmıştır. En yüksek üzüm verimi (5576.70 g/asma) 32 salkım/asma uygulamasından elde edilmiştir. Uygulamalar arasında istatistiki olarak salkım ağırlığı, salkım boyu ve salkım eni değerleri bakımından bir fark oluşmazken, tane ağırlığı, tane eni ve tane boyu değerleri bakımından fark oluşmuştur. En yüksek tane ağırlığı 16 salkım/asma uygulamasında (1.62 g), en düşük tane ağırlığı ise 32 salkım/asma uygulamasında (1.51 g) belirlenmiştir.En yüksek toplam fenol (285.20 mg GAE/100 g), toplam flavonoid (100.68 mg CTE/100 g) ve toplam monomerik antosiyanin (3.29 mg/g) madde miktarları 8 salkım/asma uygulamasından elde edilmiştir. Uygulamalar arasında DPPH ve TEAC yöntemleri ile yapılan antioksidan aktivitesi ölçümlerinde bir fark oluşmazken, FRAP yöntemi ile yapılan ölçümlerde önemli bir farkın oluştuğu tespit edilmiştir. Effects of Cluster Thinnings on Yield and Quality Characteristics in Shiraz Grape CultivarAbstract: In this study, effects on biochemical characteristics of berry with yield and quality characteristics of 4 different cluster thinnings (8, 16, 24 and 32 cluster/vine) applied after berry set in Shiraz grape cultivar grown in Güney town of Denizli provience were investigated. Antioxidant activities of grape berries were determined according to DPPH, TEAC and FRAP methods and compared. Highest grape yield were obtained in the application of 32 cluster per vine (5576.70 g vine -1 ). While there were statistically any differences among applications with regard to cluster weight, cluster length and cluster width, there were statistically different among applications with regard to berry weight, berry width and berry length. While the highest berry weight was determined in application of 16 cluster per vine (1.62 g), the lowest berry weight was determined in application of 32 cluster per vine (1.51 g). The highest total phenol (285.20 mg GAE 100 g -1 ), total flavonoids (100.68 mg CTE 100 g -1 ) and total monomeric anthocyanin (3.29 mg g -1 ) were obtained in the application of 8 cluster per vine. It was determined that among applications, there were no significant differences in antioxidant activities measured with DPPH and TEAC methods but there were significant differences in antioxidant activities measured with FRAP.

In this study, it was aimed to determine fatty acid profile and the antimicrobial activity of the seed oil obtained from the seed of Silybum marianum L. and silymarin which was extracted through methanol extraction of Silybum marianum L. seed. The antimicrobial activity of extracts was determined by testing against the microorganisms of Enterococcus faecalis, Staphylococcus aureus, Bacillus subtilis, Lactobacillus plantarum, Lactobacillus pentosus, Escherichia coli, Proteus mirabilis, Pseudomonas aeruginosa, and Candida albicans. Gas Chromatography-Mass Spectrometry was used to determine the fatty acid profile of the seed oil. The main components of the seed oil were detected as octadecadienoic acid (44.06 %), octadecenoic acid (20.18 %), hexadecenoic acid (14.63 %) and octadecanoic acid (7.75 %). Seed oil revealed antimicrobial effect on P. mirabilis, P. aeruginosa and L. pentosus ELB41 and silymarin had antimicrobial effect on L. plantarum ELB75, L. pentosus ELB37 and B. subtilis.