Yazar "Yildirim, Ebru" seçeneğine göre listele
Listeleniyor 1 - 20 / 22
Sayfa Başına Sonuç
Sıralama seçenekleri
Öğe Determination Of Veterinary Drug Residues In Sea Water, Sediment, And Natural Fish In The Aegean Sea(Parlar Scientific Publications (P S P), 2014) Baydan, Emine; Kaya, Sezai; Cagirgan, Hasmet; Yildirim, Ebru; Altintas, Levent; Yurdakok, Begum; Kucukosmanoglu, Asli GulIn this research, residues of certain veterinary drugs (florfenicol (FF) and florfenicol amine (FFA)) were screened in natural fish, sediment, and seawater samples of the Aegean Sea, while only chloramphenicol (CAP) was searched for in the sediment. Samples were collected from fish farming cages in selected coordinates (Bodrum, Salihli Region, Turkey) on September, October 2011 and March, April 2012. Method validation and analyses were carried out by HPLC method. For FF; LOD values were 25.11 ppb for sea water, 27.07 ppb for sediment as well as 38.16 and 37.95 ppb for Mullus barbatus and Oblada tnelanura fish samples. FFA value for Mullus barbatus was 39.60 ppb, respectively. For CAP in sediment samples, LOD values were found as 53.59 ppb. In 4 different sampling areas (A, B, C, D), the lowest temperature was recorded as 14 degrees C in March 2012 but the highest was 28.3 degrees C in October 2011; the lowest dissolved oxygen (mg/L) values were detected in March 2012 (from 6.05 to 6.44), the highest in October 2011(10.78-11.55). The pH values slightly varied month by month; the lowest was 7.9 and the highest 8.6. This research revealed that dissolved oxygen and pH values of the collected seawater samples were in accordance with the normal limits of the offshore seawater values; no significant residue of the analyzed veterinary drugs was found to be present, and all values were found to be lower than LOD values in the sampled fish farms. In conclusion; there was no pollution caused by veterinary drugs.Öğe The Effect of Chlorpyrifos on Isolated Thoracic Aorta in Rats(Hindawi Ltd, 2013) Yildirim, Ebru; Baydan, Emine; Kanbur, Murat; Kul, Oguz; Cinar, Miyase; Ekici, Husamettin; Atmaca, NurgulThis study investigated the effect of chlorpyrifos on thoracic aorta and on the level of NO in plasma and aorta. The effect of chlorpyrifos on thoracic aorta in organ bath was determined in 10 rats. Another 45 rats were assigned to 3 groups with 15 rats each: control group 1 received distilled water, control group 2 was given corn oil, and the last group was given 13.5 mg/kg chlorpyrifos dissolved in corn oil every other day for 8 weeks orally. Chlorpyrifos (10(-10) M-10(-5) M) showed no effect on isolated thoracic aorta. Plasma AChE activity was decreased, while LDH, ALT, GGT, and AST activities were increased in chlorpyrifos group compared to control groups. Plasma NO level was increased in chlorpyrifos group compared to control groups. iNOS expression was present in all groups in the cytoplasm of the endothelia and in the smooth muscle cells of aorta. According to semiquantitative histomorphological analysis, iNOS immunopositive reactions were seen in the decreasing order in chlorpyrifos, control 2, and control 1 groups. eNOS immunopositive reactions were observed in the endothelial cell cytoplasm, rarely in the subintimal layer, and the smooth muscle cells of aorta. There were no differences among the groups in terms of eNOS immunostaining. In conclusion, chlorpyrifos induced NO production in aorta following an increase in NOS expression.Öğe Effect of Cocoa Butter and Sunflower Oil Supplementation on Performance, Immunoglobulin, and Antioxidant Vitamin Status of Rats(Hindawi Publishing Corporation, 2014) Yildirim, Ebru; Cinar, Miyase; Yalcinkaya, Ilkay; Ekici, Husamettin; Atmaca, Nurgul; Guncum, EnesThis study investigated the effects of cocoa butter and sunflower oil alone and in combination on performance, some biochemical parameters, immunoglobulin, and antioxidant vitamin status in Wistar rats. Forty-eight male rats were assigned to four groups, consisting of 12 rats with 3 replicates. Control received balanced rat diet without oil, cocoa butter group received 3.5% cocoa butter, sunflower oil group received 3.5% sunflower oil, the last group received 1.75% sunflower oil + 1.75% cocoa butter supplementation in the rat diet for 8 weeks. The total feed consumption in sunflower oil group was statistically lower than in the other groups. The serum creatinine level was decreased in cocoa butter group compared to control. Triglyceride and VLDL cholesterol levels were decreased in only sunflower oil and only cocoa butter groups as compared to control. The level of Ig M was statistically lower in cocoa butter and cocoa butter + sunflower oil groups than in control and sunflower oil groups. There were no statistically important difference in vitamin concentrations among trial groups. It was concluded that the supplementation of cocoa butter in diet decreased Ig M level, while the supplementation of cocoa butter and sunflower oil alone decreased the triglyceride and VLDL cholesterol levels.Öğe The effect of prebiotic and organic zinc alone and in combination in broiler diets on the performance and some blood parameters(Taylor & Francis Ltd, 2012) Yalcinkaya, Ilkay; Cinar, Miyase; Yildirim, Ebru; Erat, Serkan; Basalan, Mehmet; Gungor, TulinThis study was conducted to investigate the effects of prebiotic and organic zinc alone and in combination in broiler diets on the live weight gain (LWG), feed consumption (FC), feed consumption ratio (FCR), carcass yield, some relative organ weights and blood parameters. A total of 160 Ross 308 one-day old male chicks were assigned to 4 treatment groups with 4 replicates of 10 birds each. Treatment for each group consisted of: first group (control group) received basal diet without supplementation; second group received 1 g/kg Mannano ligosaccharide (MOS); third group received 80 mg/kg organic zinc (OZn); and fourth group received 80 mg/kg organic zinc + 1 g/kg Mannanoligosaccharide (MOS+OZn). The study lasted 42 days. The supplementation of MOS and OZn had no effect on the LWG, FC, FCR, carcass yield, serum aspartate aminotranferase, (AST), alanine aminotransferase (ALT), alkaline phosphatase (ALP) and triglyceride levels during the experiment (P>0.05). Relative organ weights (liver, spleen, pancreas) were significantly higher in OZn group than those in the other groups (P<0.001). There was a significant difference in serum total cholesterol and glucose levels between treatment groups and control group (P<0.001). Serum Zn and Fe levels were significantly lower in control group than those in OZn and MOS+OZn groups (P<0.001). The highest and the lowest Cu levels were in the MOS+OZn and control groups, respectively (P<0.001). These data suggest that OZn with MOS combination may have a beneficial effect on serum mineral level in broilers.Öğe Effect of Resveratrol on Hematological and Biochemical Alterations in Rats Exposed to Fluoride(Hindawi Publishing Corporation, 2014) Atmaca, Nurgul; Yildirim, Ebru; Guner, Bayram; Kabakci, Ruhi; Bilmen, Fatih SultanWe investigated the protective effects of resveratrol on hematological and biochemical changes induced by fluoride in rats. A total of 28 rats were divided into 4 groups: control, resveratrol, fluoride, and fluoride/resveratrol (n = 7 each), for a total of 21 days of treatment. Blood samples were taken and hematological and biochemical parameters were measured. Compared to the control group, the fluoride-treated group showed significant differences in several hematological parameters, including decreases in WBC, RBC, and PLT counts and neutrophil ratio. The group that received resveratrol alone showed a decrease in WBC count compared to the control group. Furthermore, in comparison to the control group, the fluoride group showed significantly increased ALT enzyme activity and decreased inorganic phosphorus level. The hematological and biochemical parameters in the fluoride + resveratrol treated group were similar to control group. In the fluoride + resveratrol group, resveratrol restored the changes observed following fluoride treatment, including decreased counts of WBC, RBC, and PLT, decreased neutrophil ratio and inorganic phosphorus levels, and elevated ALT enzyme activity. The present study showed that fluoride caused adverse effects in rats and that resveratrol reduced hematological and biochemical alterations produced by fluoride exposure.Öğe The effect of seasonal variations on the occurrence of certain mycotoxins in concentrate feeds for cattle collected from some provinces in Turkey(Scientific Technical Research Council Turkey-Tubitak, 2016) Ekici, Husamettin; Yildirim, Ebru; Yarsan, EnderThe aim of this study was to determine the effects of seasonal variations on the occurrence of total aflatoxin (AFTotal), aflatoxin B1 (AFB1), ochratoxin A (OTA), and total fumonisin (FTotal) in the commercially mixed ruminant feed obtained from feed mills located in Ankara, Kirikkale, Cankiri, Corum, and Kirsehir provinces using the enzyme-linked immunoassay (ELISA) method. To represent the annual production, 22 samples were collected every quarter over 1 year (a total of 88 samples) starting in September 2012. AFTotal and AFB1 were detected in 72 samples (81.81%), OTA in 84 samples (95.45%), and FTotal in 83 samples (94.31%). When seasonal changes were taken into consideration, the highest levels of AFTotal, AFB1, and FTotal (13.57 +/- 8.78 ppb, 8.54 +/- 6.02 ppb, and 0.70 +/- 0.88 ppm, respectively) were found in the summer, while the highest OTA level (57.69 +/- 14.59 ppb) was observed in the spring. The results of high-performance liquid chromatography methods confirmed the results of the ELISA method. Consequently, although most of the feed samples were contaminated with mycotoxins, all the amounts were within the limits allowed for feedstuffs in Turkey.Öğe The Effects of Bisphenol A on in Vitro Cat Uterus Contractility(Wiley, 2018) Kabakci, Ruhi; Macun, Hasan Ceyhun; Polat, Ibrahim Mert; Yildirim, Ebru…Öğe The Effects of Cadmium, Copper and Lead on In Vitro Bovine Uterine Contractility(Kafkas Univ, Veteriner Fakultesi Dergisi, 2013) Yildirim, Ebru; Macun, Hasan CeyhunThe aim of this study was to investigate in vitro effects of cadmium, copper and lead on isolated bovine uterus contractions at follicular and luteal stage. In this study myometrial strips obtained from healthy Holstein cows slaughtered in Kirikkale slaughterhouse were used. The strips were mounted to isolated organ bath under a basal tension of 2 g. The effects of 10(-5) M cadmium, 10(-4) M copper and 10(-4) M lead on the spontaneous, 2.5 mIU/ml oxytocin and 10(-6) M PGF(2) alpha induced contractions were examined. At follicular stage, all contractility parameters (maximum and mean amplitudes and frequency) of uterine induced by oxytocin and prostaglandin F-2 alpha (PGF(2) alpha), and at the luteal stage all contractility parameters of spontaneous, oxytocin and PGF(2) alpha induced contractions were decreased significantly by cadmium. At follicular stage the maximum and mean amplitude of spontaneous contractions, all contractility parameters induced by oxytocin, the frequency and maximum amplitude caused by PGF(2) alpha and, at the luteal stage the maximum amplitude of spontaneous contractions, the frequency and maximum amplitude of uterine contractions induced by oxytocin, and maximum-mean amplitude of contractions induced by PGF(2) alpha were decreased by copper. While lead decreased the frequency of uterine contractions induced by PGF(2) alpha and oxytocin at folicular and luteal stage, at luteal stage it increased the mean amplitude of spontaneous contractions. It was suggested that cadmium, copper and lead changed the contractility of bovine uterine; therefore this may be effect the fertility in cattles.Öğe Effects of Dietary Supplementation with Vitamin C and Vitamin E and Their Combination on Growth Performance, Some Biochemical Parameters, and Oxidative Stress Induced by Copper Toxicity in Broilers(Humana Press Inc, 2014) Cinar, Miyase; Yildirim, Ebru; Yigit, A. Arzu; Yalcinkaya, Ilkay; Duru, Ozkan; Kisa, Ucler; Atmaca, NurgulThis study investigated effects of dietary supplementation with vitamin C, vitamin E on performance, biochemical parameters, and oxidative stress induced by copper toxicity in broilers. A total of 240, 1-day-old, broilers were assigned to eight groups with three replicates of 10 chicks each. The groups were fed on the following diets: control (basal diet), vitamin C (250 mg/kg diet), vitamin E (250 mg/kg diet), vitamin C + vitamin E (250 mg/kg + 250 mg/kg diet), and copper (300 mg/kg diet) alone or in combination with the corresponding vitamins. At the 6th week, the body weights of broilers were decreased in copper, copper + vitamin E, and copper + vitamin C + vitamin E groups compared to control. The feed conversion ratio was poor in copper group. Plasma aspartate aminotransferase, alanine aminotransferase, alkaline phosphatase activities, iron, copper concentrations, and erythrocyte malondialdehyde were increased; plasma vitamin A and C concentrations and erythrocyte superoxide dismutase were decreased in copper group compared to control. Glutathione peroxidase, vitamin C, and iron levels were increased; aspartate aminotransferase, alanine aminotransferase, alkaline phosphatase, and copper levels were decreased in copper + vitamin C group, while superoxide dismutase, glutathione peroxidase, and vitamin E concentrations were increased; aspartate aminotransferase, alanine aminotransferase, and alkaline phosphatase were decreased in copper with vitamin E group compared to copper group. The vitamin C concentrations were increased; copper, uric acid, aspartate aminotransferase, alanine aminotransferase, alkaline phosphatase, and malondialdehyde were decreased in copper + vitamin C + vitamin E group compared to copper group. To conclude, copper caused oxidative stress in broilers. The combination of vitamin C and vitamin E addition might alleviate the harmful effects of copper as demonstrated by decreased lipid peroxidation and hepatic enzymes.Öğe Effects of edaravone on testicular torsion-detorsion injury in rats(Wiley, 2024) Sahin, Yasar; Ustuner, Evren; Tutun, Hidayet; Yildirim, Ebru; Eroglu, Oguz; Kurtdede, Efe; Ozkabadayi, YasinBackground and objective: This study aimed to assess the protective ability of edaravone on testicular torsion-detorsion injury in rats. Methods: Eighteen adult male Sprague-Dawley rats were randomly divided into three groups: Sham group (control, n = 6); testicular torsion/detorsion (T/D group, n = 6) and T/D+edaravone (T/D+E group, n = 6). The spermatic cords of rats of the T/D group and the T/D+E group were rotated 720(degrees) in a clockwise direction and maintained for 120 min in this torsion position. Around 90 min after the torsion, edaravone at a dose of 10 mg/kg dissolved in saline was administered IP to the T/D+E group. The testicle was counter-rotated to its normal position to allow reperfusion for 4 h. Left testes of each animal were excised 240 min after beginning of reperfusion. Oxidative stress markers (TAS, TOS, SOD, and MDA) and apoptotic pathways (Caspase 3, Caspase 8, Caspase 9, Bcl-2, and Bax,) were assessed by ELISA methods. Also, testicles were subjected to the histopathologic and ultrasound examinations. Results: Ultrasound imaging showed that edaravone reduced the surface area and increased vascularization in testicles with T/D (p < 0.0001, p < 0.05, respectively). Edaravone pretreatment markedly decreased the levels of MDA, TOS, Bcl-2, Bax, Caspase 3, Caspase 8, and Caspase 9 (p < 0.0001). Also, it increased significantly TAS levels (p < 0.0001) and reduced insignificantly SOD activity. Histopathologic examinations demonstrated that edaravone significantly attenuated the histological damage caused by T/D in testicles. Conclusion: Taken together, the findings indicate that pretreatment of edaravone has protective effect against testicular T/D injury.Öğe Effects of magnesium sulphate on the oxidative stress, biochemical and hematological parameters in pregnant rats with L- NAME induced preeclampsia(Parlar Scientific Publications (P S P), 2011) Cinar, Miyase; Yildirim, Ebru; Yigit, A. Arzu; Macun, H. Ceyhun; Duru, OzkanThe aim of this study was to investigate the effects of magnesium sulphate (MgSO4) on some biochemical and hematological parameters, lipid peroxidation, and antioxidant enzymes in pregnant rat model of preeclampsia induced by L-w-nitro-L-arginine methyl ester (L-NAME). Thirty two pregnant Sprague-Dawley rats were divided into 4 equal groups as control, L-NAME (50 mg/kg bw/day), MgSO4 (600 mg/kg bw/day) or L-NAME + MgSO4 (1-4) given groups on the 11(th) day of the pregnancy in their drinking water. The increased blood pressure (BP) was detected on the 12(th) and 19(th) days of pregnancy. Blood samples were collected on the 19(th) day to determine blood oxidative status, some biochemical and hematological parameters. L-NAME decreased erythrocyte superoxide dismutase activity, plasma total protein level and increased erythrocyte catalase and glutathion peroxidase activities, BP, plasma malondialdehyde, cholesterol and triglyceride levels, alkaline phophatase activity and white blood cell counts compared to control group. While MgSO4 decreased aspartate amino transferase and alanine amino transferase activities and calcium level, it increased magnesium level compared to control group. Increased BP, plasma cholesterol levels, erythrocyte catalase and glutathione peroxidase activities by L-NAME were decreased by the addition of MgSO4. In conclusion, MgSO4 (600 mg/kg bw/day) may be beneficial in the treatment of preeclampsia by increasing usage of antioxidant enzymesÖğe Effects of Supplemental Epigallocatechin Gallate in the Diet of Broilers Exposed to Fluoride Intoxication(Humana Press Inc, 2018) Aydogan, Ilkay; Karsli, Mehmet Akif; Basalan, Mehmet; Yildirim, Ebru; Cinar, Miyase; Sen, Goekhan; Sumer, TugceWe evaluated the effects of dietary epigallocatechin gallate (EGCG) on the performance, biochemical parameters, and liver histopathology of fluoride-intoxicated broiler chickens. In total, 160 1-day-old male broiler chicks (Ross PM3 strain) were collected and assigned to four groups (40 animals each), with four replicates. The control group received a basal diet; the F group received 800mg/kg fluoride; the EGCG group received 400mg/kg EGCG; and the EGCG+F group received 400mg/kg EGCG and 800mg/kg fluoride. The live weight (LW) of F-treated chicks was significantly lower than that of the controls. In the F-treated groups, feed intake (FI) and LW values were lower, but the feed conversion ratio (FCR) was higher than those of the controls. The ratio of heart weight to LW was found to be the highest in the F-treated groups. Alkaline phosphatase (ALP), aspartate aminotransferase (AST), and total oxidant status (TOS) levels in the F-treated groups were significantly higher, whereas the increase in total cholesterol levels was insignificant than those in the control group. In the EGCG+F group, AST, total cholesterol, and TOS levels decreased to a level comparable to those in the control group. Histopathological evaluation revealed that there were mild changes in the portal region in the EGCG+F group; additionally, there was an improvement in liver morphology in the EGCG+F group compared to that in the F group. Thus, EGCG has potent antioxidant and regenerative effects that can ameliorate the detrimental effects of fluoride toxicity on blood parameters and the liver.Öğe The Effects of Yeast Glucomannan (Mycosorb) on Lipid Peroxidation and Non-Enzymatic Antioxidative Status in Experimentally Induced Aflatoxicosis in Broilers(Medwell Online, 2008) Cinar, Miyase; Yildirim, Ebru; Yalcinkaya, Ilkay; Eraslan, GoekhanThe aim of this study was to determine the effect of yeast glucomannan (Mycosorb), an aflatoxin binder, on lipid peroxidation and non-enzymatic antioxidative status in experimentally induced aflatoxicosis in broilers. Forty, I-day-old male broiler (Ross 308) chickens were randomly divided into 4 groups of 10 birds each. The control group was fed a basal diet and the remaining groups received 0.75 g kg(-1) Mycosorb, 2 ppm Aflatoxin (AF) and 0.75 g kg(-1) Mycosorb +2 ppm Aflatoxin (AF) for 21 days. At the end of day 21, blood samples were collected and plasma Malondialdehyde (MDA), Ceruloplasmin (CP), albumin (alb), uric acid, vitamin A (vit A), beta-carotene, vitamin C (vit C) and vitamin E (vit E) levels were determined. Plasma MDA levels increased insignificantly and A levels decreased significantly in AF and AF+Mycosorb groups when compared to control and mycosorb groups. Plasma CP, vit A and beta-carotene levels decreased significantly in AF groups when compared to control. In AF and AF+Mycosorb group, significant decreases were determined in vit E levels when compared to control and in vit C levels when compared to mycosorb group. Plasma uric acid levels were not affected by these treatments. It is concluded that subacute dietary intake of AF altered nonenzymatic components (CP, alb, vit A, beta carotene, Vit E) of antioxidant defense systems and 0,75 g kg(-1) yeast glucomannan was not sufficient to ameliorate the oxidative damage caused by AF in broilers.Öğe Ginkgo Biloba Extract (EGb 761) Protects The Mice Brain Against Fluoride-Induced Oxidative Stress(Parlar Scientific Publications (P S P), 2014) Atmaca, Nurgul; Aksu, Devrim Saripinar; Yildirim, Ebru; Atmaca, H. TarikThe aim of this study was to investigate the effects of Ginkgo biloba extract (EGb 761) on oxidative stress and the histopathological changes in brain tissues of mice exposed to fluoride administration. A total of 24 mice were divided into 4 groups as control, EGb 761, fluoride and fluoride+EGb 761, with 6 mice in each group. Control group received drinking water, fluoride group received 50 mg/L fluoride in drinking water, fluoride+EGb 761 group was given 50 mg/L fluoride in drinking water and 20 mg/kg EGb 761 orally by gavage, and EGb 761 group was given only 20 mg/kg EGb 761 orally by gavage for 30 days. At the end of the experimental period, the levels of malondialdehyde (MBA) and glutathione (GSH) as well as' the activities of superoxide dismutase (SOD) and catalase (CAT) were detected, and histopathological examination was conducted in the brain of mice. The results showed that the levels of MDA, GSH, and the activities of SOD and CAT in fluoride group were statistically higher than in the control group. However, no statistically significant difference was detected between fluoride+EGb 761 and control group. The neurodejenerative changes seen in fluoride group were not detected in fluoride+EGb 761 group. It was concluded that the toxic effect of fluoride was related to the formation of reactive oxygen species, and EGb 761 had a protective effect by preserving antioxidant enzymes activity in mice brain tissues. Ginkgo biloba extract also prevented the histopathological changes induced by fluoride administration.Öğe In vitro exposure to di-(2-ethylhexyl) phthalate (DEHP) stimulates spontaneous feline uterine contractions(SCIENTIFIC TECHNICAL RESEARCH COUNCIL TURKEY-TUBITAK, 2020) Kabakci, Ruhi; Macun, Hasan Ceyhun; Yildirim, Ebru; Polat, Ibrahim Mert; Elifoglu, Taha BurakDi-(2-ethylhexyl) phthalate (DEHP) is widely used as a plasticizer in various products such as PVC-derived plastics, toys, packaging materials, cosmetics, and pharmaceuticals. This study aimed to investigate the effect of DEHP on spontaneous contractions of the feline uterus in vitro. Tubal 1-cm uterine samples prepared from 10, 9, and 12 uteri obtained from adult cats in estrus (n = 5), diestrus (n = 5), and interestrus (n = 5), respectively, after ovariohysterectomy were suspended in an isolated organ bath in aerated Krebs solution at 39 +/- 1 degrees C, and an initial 1 g tension was given. After 1 h equilibration of tissues, the spontaneous contractions were recorded for 10 min as control. The effects of solvent and DEHP (0.001-100 mu M) on contractions were then evaluated in terms of frequency and mean amplitude parameters. It was observed that DEHP had no effect on uterine contractions of cats in interestrus. However, DEHP significantly increased the mean amplitude of uterine contractions during the estrus and diestrus periods at concentrations of 1 mu M and 10 mu M, respectively, depending on the dose (P < 0.05). Decreases in the frequency of the contractions in the estrus and diestrus periods were not statistically significant (P > 0.05). 'this study, carried out for the first time in cats, showed that DEHP has a stimulatory effect on uterine contractions. We concluded that disruption of the uterine contractions, which are essential for physiological reproductive processes such as regular estrous cycles, sperm and zygote transport, implantation and continuation of pregnancy, by DEHP exposure may cause many reproductive problems.Öğe Influence of Florfenicol on Hematological Parameters in Broilers(Wiley, 2018) Yigit, Ayse Arzu; Yildirim, Ebru; Baydan, Emine; Aydogan, Ilkay; Ekici, Husamettin; Guncum, Enes…Öğe Inhibitory effect of Bisphenol A on in vitro feline uterine contractions(Elsevier Science Bv, 2019) Kabakci, Ruhi; Macun, Hasan Ceyhun; Polat, Ibrahim Mert; Yildirim, EbruBisphenol A (BPA) is an environmental pollutant used as a plasticizer in the manufacture of many plastic products, such as packaging, containers, and water and beverage bottles. There are deleterious effects of BPA on metabolic, endocrine, nervous, and reproductive systems. This is the first study in which there was investigation of the in vitro effect of BPA on the spontaneous contractions of the cat uterus. The tubal uterine segments (1 cm) collected from queens in estrus were suspended in an isolated organ bath. Following tissue stabilization, spontaneous contractions were recorded for 10 min to constitute the control group. The effects of the solvent (alcohol) and BPA at different concentrations (1, 10, and 100 mu M) on uterine contractions were subsequently evaluated at 10 min intervals in terms of frequency and mean amplitude variables. The ethanol vehicle did not alter the uterine contractions compared to the control group. All concentrations of BPA used in the study resulted in a reduction (P < 0.05) in amplitude of uterine contractions in a dose-dependent manner, while only the largest dose of BPA decreased the frequency of contractions (P < 0.05). In reproductive physiology, regular uterine contractions facilitate successful fertilization, migration, implantation, and maintenance of pregnancy, as well as fetus expulsion. The results of this study indicate BPA has an inhibitory effect on spontaneous contractions of the cat uterus. It is proposed that this suppressive effect of BPA on uterine contractions might lead to queen infertility.Öğe Investigation of some veterinary drug residues in sea water, sediment, and wild fishes captured around fish farms in the Aegean Sea: Oxytetracyline, ivermectin and emamectin(Ankara Univ Press, 2015) Baydan, Emine; Kaya, Sezai; Cagirgan, Hasmet; Yildirim, Ebru; Altintas, Levent; Yurdakok, Begun; Kucukosmanoglu, Asli GulVeterinary drug residues and their metabolites in food are regularly investigated by local authorities; however their fate in the environment is still unknown. Despite the importance of the aquaculture industry and the widespread use of antibiotics; limited scientific information regarding their residue in natural fish, sediment and sea water are available in TURKEY. The current study; which is the first study in this area, was undertaken to determine the oxytetracycline (OTC), ivermectin (IVM) and emamectin benzoate (EMA) residues from samples of wild fishes (Oblada melanura, Mullus barbatus), sea water and sediment collected in four different months, caught around the fish cages near Salihli Island in Bodrum, Aegean Sea. Samples were analyzed by High Pressure Liquid Chromatography (HPLC) followed by the validation for each matrix. No residues were found to be above the Limit of detection (LOD) levels of the validated methods in the screened samples. In order to understand the possible risk of veterinary antibiotics, especially for low dose accumulation, to the ecosystem for sustainable aquaculture, conduction of more screening analysis with expanded possible matrices would be beneficial.Öğe The Smooth Muscle Contractility In Aflatoxicated Broiler Chicken Ileum(Parlar Scientific Publications (P S P), 2013) Yildirim, Ebru; Aktuna, Zuhal; Yalcinkaya, Ilkay; Eraslan, Gokhan; Kanbur, Murat; Aydos, Tolga R.; Oruc, ErtanThis study was conducted to investigate the contractility of aflatoxicated isolated broiler ileum smooth muscles. Fourty-eight, one-day old broiler chicks were divided into 4 groups, each containing 12 chicks. The 1st group was the control group, the 2nd group received 1 g/kg yeast glucomannan (Mycosorb), the 3rd group received 2 mg/kg aflatoxin, and the 4th group received 1 g/kg yeast glucomannan + 2 mg/kg aflatoxin in the feed. At the 21st day of the study, chicks were decapitated and the ileum isolated. Decapitation lasted on 28th day of the study. The isolated ileum strips were mounted under a basal tension of 1 g. The contractions of acetylcholine (ACh), nicotine, and bethanechol were calculated as g contraction/mg wet weight of ileum. For histopathologic examination, ileum sections were stained with hematoxylin-eosin and masson trichrome. The isolated ileum muscle contractions with ACh, nicotine, and bethanechol were not statistically significant in the study groups as compared to control group (P>0.05). Pathological examination revealed no histopathological changes in the smooth muscle tissues of the study group chicks when compared with control group. It is concluded that aflatoxins do not specifically change the contractility of broiler chick ileum to agonists most likely due to lack of aflatoxin-induced pathologic changes in the broiler chick ileum.Öğe The apoptotic and proliferative effects of tulathromycin and gamithromycin on bovine tracheal epithelial cell culture(Tubitak Scientific & Technological Research Council Turkey, 2022) Sahin, Yasar; Yildirim, Ebru; Yurdakok Dikmen, Begum; Turk, MustafaGamithromycin and tulathromycin are commonly used in the treatment of bovine respiratory bacterial diseases. The current work was undertaken to establish the apoptotic, necrotic, and cytotoxic effects of these antibiotics in the target animal. Cells with apoptosis and necrosis were determined by dual staining method, cytotoxic effects were determined by MTT assay, cell proliferative effects were examined by XCelligence real-time cell analysis system (RTCA-SP). The comparison between gamithromycin and tulathromycin concentrations on tracheal cells in terms of % cell viability was found to be significantly different. While the cell viability percentage of gamithromycin was higher at 150 mu g/mL, 180 mu g/mL, and 240 mu g/mL than tulathromycin, and at 2 mu g/mL, 4 mu g/mL, 10 mu g/mL, 20 mu g/mL, and 50 mu g/mL concentrations tulathromycin cell viability was higher than gamithromycin (p < 0.05). When the staining method data were evaluated, the difference between the results of % apoptotic index at 20 mu g/mL concentration was significant and it was found that gamithromycin had more apoptotic effect than tulathromycin (p < 0.05). It was seen that tulathromycin and gamithromycin applied on tracheal epithelial cells at concentrations of 2 and 10 mu g/mL increased the viability depending on time. The increase in epithelial cell proliferation of gamithromycin and tulathromycin due to time shows that these antibiotics can maintain longterm prophylactic treatment against diseases.
