Yazar "Yalcinkaya, I." seçeneğine göre listele

Listeleniyor 1 - 2 / 2
  • Küçük Resim
    Öğe
    Effects of yeast glucomannan on performance, some biochemical parameters and pathological changes in experimental aflatoxicosis in broiler chickens
    (Ecole Nationale Veterinaire Toulouse, 2011) Yildirim, E.; Yalcinkaya, I.; Kanbur, M.; Cinar, M.; Oruc, E.
    The study aims to investigate the effects of yeast glucomannan (GM) (Mycosorb (R), Altech) on performance, biochemical parameters and organ pathology in experimental aflatoxicosis in broiler chickens. A total of 120 one day old broiler chickens were assigned to 4 equal groups according to the dietary treatments: whereas the control birds (group C) received the basal diet, those from the group GM were only supplemented with 0.75 g/kg GM, those from the AF group were orally contaminated with 2 mg/kg total aflatoxins and those from the GM + AF group were exposed to aflatoxins and supplemented with GM for 21 days. Growth performance (body weights, weight gains). feed intake and feed efficiency were weekly assessed on all birds and at the end of the experiment, plasma biochemical parameters, visceral organ masses and conventional histopathology of liver and kidney were determined in 9 birds from each experimental group. The dietary aflatoxin contamination has significantly altered the growth performance (significant decreases in the final weight and in weight gains for the 3(rd) week and for the whole period), the feed intake mainly in the last week and the food efficiency, induced severe degenerative and necrotic lesions coupled to fibrosis in liver and kidney leading to significant changes in total plasma protein, total cholesterol, urea, creatinine and calcium concentrations, as well as in the AST (aspartate aminotransferase) and GGT (earnmaglutamyl transferase) activities. Nevertheless, the weight gains and feed efficiency were partially restored and the uraemia, the creatininemia and the plasma AST activity were significantly improved when aflatoxin contaminated birds were supplemented with GM despite the presence of liver and kidney damage similar to those observed in the AF group. These results demonstrate that a short duration (21 days) period is sufficient for inducing aflatoxicosis in broilers and that the yeast glucomannan supplementation at the dose of 0.75 g/kg may partially alleviated the deleterious effects but was insufficient for preventing tissue damage.
  • Küçük Resim
    Öğe
    Nutrient content and in vitro digestibility of Turkish grape pomaces
    (Elsevier Science Bv, 2011) Basalan, M.; Gungor, T.; Owens, F. N.; Yalcinkaya, I.
    During harvest of grapes for wine production in Turkey, a total of 28 fresh grape pomace samples from white and red wine grape varieties were collected from wine production facilities. Samples were classified by grape color and the pomace from red grapes was separated manually into stalk, skin plus pulp and seed fractions. Nutrient contents were determined for total samples and for fractions. Assays included dry matter (DM), crude protein (CP), ether extract (EE), neutral detergent fiber (NDF), acid detergent fiber (ADF) and ash. To estimate ruminal digestion, in vitro disappearance of DM and NDF were determined using ruminal fluid collected at a local slaughterhouse. Color of grape altered (P<0.05) DM, CP, NDF and ADF content of the grape pomace. Although in vitro disappearance of DM and NDF at 48 h was similar for pomace from both white and red grapes, DM disappearance was higher at short incubation times for pomace from red grapes. Nutrient content generally differed among the fractions of pomace assayed, and in vitro disappearance of DM at 48 h was higher for skin plus pulp and for seed than for the stalk fraction of the pomace. Fresh grape pomace, particularly pomace from red grapes rich in skin and seed, should be a suitable feed for ruminants and to nonruminants with extensive cecal fermentation. (C) 2011 Elsevier B.V. All rights reserved.