Person: OMURTAG KORKMAZ, BURCU İREM
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OMURTAG KORKMAZ
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BURCU İREM
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Publication Metadata only Midye dolmadaki mikrobiyolojik tehlikeler ve gramaj analizi(2018-05-03) OMURTAG KORKMAZ, BURCU İREM; OMURTAG KORKMAZ B. İ., KORKMAZ S.Publication Metadata only Gıda kaynaklı hastalıklarda risk değerlendirmesi(2018-04-12) OMURTAG KORKMAZ, BURCU İREM; OMURTAG KORKMAZ B. İ.Publication Metadata only Risk factors and assessment of bacterial pathogens in food(2014-09-18) OMURTAG KORKMAZ, BURCU İREM; OMURTAG KORKMAZ B. İ.Publication Metadata only Effect of Maca (Lepidium meyenii) powder dietary supplementation on performance, egg quality, yolk cholesterol, serum parameters and antioxidant status of laying hens in the post-peak period(EUGEN ULMER GMBH CO, 2016) OMURTAG KORKMAZ, BURCU İREM; Korkmaz, S.; Eseceli, H.; Korkmaz, Irem Omurtag; Bilal, TanayThe present study investigated the effects of dietary supplementation with Maca powder on the performance, egg quality, serum parameters, hormones and antioxidant enzyme levels of laying hens in their post-peak period. A total of 150 hens, 56 week of age, were separated into three treatment groups (50 hens per group). Over 16 weeks, diets were supplemented with Maca powder at concentrations of 0 (control), 5 and 10 g/kg respectively. Performance and egg quality were not significantly influenced by the supplementation of Maca powder. Cholesterol contents of the yolk were not influenced by the experimental diets. At the end of the study, no significant difference in the levels of serum glucose, total triglyceride and total cholesterol, calcium, phosphorus, progesterone and oestradiol was detected. However, serum magnesium levels decreased as the rate of Maca powder increased (P< 0.05). A significant increase in serum glutathione peroxidase (GPx) was measured in the hens fed with 10 g/kg Maca powder. In conclusion, Maca powder had neither positive nor adverse impacts on performance, egg quality, yolk cholesterol content, serum parameters (except magnesium) and hormones. Despite that serum magnesium levels were adversely affected, Maca powder may enhance the antioxidant status, specifically GPx, of laying hens in the post-peak period.Publication Metadata only Fermente besinler ve mikrobiyota İlişkisi(2017-04-21) OMURTAG KORKMAZ, BURCU İREM; OMURTAG KORKMAZ B. İ.Publication Metadata only Microbiological quality and portion analysis of döner sandwiches(2017-03-01) OMURTAG KORKMAZ, BURCU İREM; RAYAMAN, ERKAN; RAYAMAN, PERVİN; SOYOĞUL GÜRER, ÜMRAN; OMURTAG KORKMAZ B. İ., RAYAMAN E., RAYAMAN P., SOYOĞUL GÜRER Ü.Publication Open Access OCCURRENCE OF FUMONISINS B-1 AND B-2 IN HOMEMADE MEDICINAL PLANTS: EXPOSURE ASSESSMENT IN NORTHERN TURKEY(AKADEMIAI KIADO ZRT, 2016-03) OMURTAG KORKMAZ, BURCU İREM; Soyogul, U. Gurer; Korkmaz, I. Omurtag; Dumlu, M. Ulusoylu; Omurtag, G. Z.This study was conducted to determine the recent level of contamination with Fumonisin B-1 (FB1) and Fumonisin B-2 (FB2) in major medicinal plants and to assess consumer exposure in northern Turkey. FB1 and FB2 were investigated by using high performance liquid chromatography (HPLC) with fluorescence detection after derivatization with o-phthaldialdehyde (OPA). A total of 78 homemade medicinal plant samples from 14 species were analysed. The recovery in thyme was 67.2 +/- 5.2% for FB1 and 80.8 +/- 14.3% for FB2 spiked with 1 mu g g(-1) of each analyte. The minimum detectable amount for the OPA derivatives of FB1 and FB2 were 1 ng per injection and 2.5 ng per injection, respectively. The limit of quantitation (LOQ) S/N=10 was 0.078 and 0.313 mu g g(-1), and the limit of detection (LOD) S/N=3 was 0.023 and 0.093 mu g g(-1) for FB1 and FB2, respectively. FB1 was detected in thyme (0.125) and mint (0.125 and 0.256 mu g g(-1)) samples; however. FB2 toxin was below the detection limit in all samples. These results indicate that toxins might be present in homemade medicinal plants; however, the risk of exposure to fumonisins by the consumption of those plants was lower than the estimated TDI limits (<2 mu g kg(-1) bw).