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Articles by Gursel SONMEZ
Total Records ( 2 ) for Gursel SONMEZ
  Huseyin YILDIZ , Metin PETEK , Gursel SONMEZ , İlker ARICAN and Bestami YILMAZ
  This study was conducted to determine the effects of 2 lighting programs (continuous: 24 h light:0 h dark; intermittent: 12 h daylight followed by 3 cycles of 1 h light, and then 3 h dark during the night) and 3 ascorbic acid supplementations (0, 200, and 400 mg/L added to water) on broiler performance, bone characteristics, and the incidence of tibial dyschondroplasia. One-day-old male commercial (Ross PM3) broiler chicks (600) were divided into 6 treatment groups (2 x 3) with random replicates (4 replicates per treatment). At the end of 6 weeks data revealed that the lighting program, which was one of the main factors tested, affected the feed conversion ratio and live weight gain (P < 0.05), while ascorbic acid (the other main factor) and the interactions of both factors did not significantly influence broiler performance characteristics. Length and weight of the tibiotarsus were positively affected by the use of intermittent lighting, whereas ascorbic acid had a positive effect only on the weight of the bone. Continuous lighting improved cortical thickness of the tibiotarsus (P < 0.01) and decreased the incidence of tibial dyschondroplasia insignificantly. There was not a lighting x supplemental ascorbic acid interaction for tibial dyschondroplasia. The results of the present study suggest that use of intermittent lighting and supplementation of ascorbic acid (200 mg/L) can efficiently prevent leg problems, and increase bone strength and broiler performance.
  The present study describes giant-cell tumor of bone (GCToB) with lymph node involvement in a 5-year-old crossbred cat. The animal was referred to the surgery clinic with progressive subcutaneous swelling in the left proximal femoral region, severe lameness, constipation, and dysuria. A moderately firm, subcutaneous, palpable mass, 9 cm in diameter, was observed, and biopsy samples were taken. Histopathologically, the mass was constituted by ovoid-shaped mononuclear cells intermixed with many multinucleated giant cells (MGC). Immunohistochemically, the giant cells were positively stained with antivimentin, and the same cells were negative for antidesmin and anti-S100 staining. Tartrate-resistant acid phosphatase (TRAP) activity in tumor cells was evaluated and the tumor was diagnosed as malignant GCToB; the cat was euthanized. Macroscopically, while the regional lymph nodes were intact, giant cells were found in the left popliteal lymph node during microscopy. Although a few cases of GCToB have been reported in cats, the case herein displays, for the first time, evidence of lymph node involvement during the process of metastasis.
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