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  • Küçük Resim
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    Central corneal thickness in tilted disc syndrome
    (Lippincott Williams & Wilkins, 2008) Ornek, Kemal; Ozdemir, Mehmet
    Purpose. Earlier literature reports that abnormal optic disc shape or size seem to be closely associated with the shape or size of the cornea. Here we search for an association between the presence of tilted disc syndrome and the central corneal thickness. Methods. Sixty-one eyes of 61 patients with tilted disc syndrome were included in the study. Sixty-one eyes of 61 subjects were chosen as controls. Corneal thickness was evaluated with ultrasound pachymetry from the central region after instillation of topical proparacaine hydrochloride and before the ophthalmologic examination. Results. The mean central corneal thickness in the tilted disc syndrome group was found to be 547.5 +/- 36.16 mu m (median 546, range 467 to 638). The mean central corneal thickness in the control group was measured as 541.09 +/- 29.52 mu m (median 540, range 500 to 627). There was no statistically significant difference in corneal thickness between the tilted disc syndrome group and control group (p = 0.218). Conclusion. There seems to be no correlation between the central corneal thickness and the presence of tilted disc syndrome.
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    Effects of defaunation and dietary nitrogen source on sodium, potassium, iron and zinc in the rumen fluid, plasma and wool of lambs
    (Scientific Technical Research Council Turkey-Tubitak, 2006) Ozdemir, Mehmet; Cinar, Miyase; Haliloglu, Seyfullah; Eryavuz, Abdullah
    This study was conducted to investigate the effects of defaunation, and the addition of urea and sulfur in the replacement of plant protein (PP) sources on concentrations of Na, K, Zn and Fe in the ruminal fluid, blood plasma and wool of lambs. Forty male Ramlic lambs, 2.70 +/- 0.30 months of age, and weighing approximately 16.44 +/- 0.41 kg, were used. Lambs were divided into 4 groups as follows: faunate + control diet (FC), defaunate + control diet (DC), faunate + experimental diet (FE), and defaunate + experimental diet (DE). The control diet contained plant protein as a N source, whereas the experimental diet was supplemented with urea and sulfur, both at 3% of BW per day. The forage portion of the diet was 350 g of alfalfa hay per lamb per day. Diets were fed twice daily in equal amounts. Defaunation, or feeding a diet supplemented with urea and sulfur in place of plant protein sources, had no effect on ruminal fluid Na concentrations but there was an interaction on Na concentration in the rumen fluid. Ruminal K concentration was lower (P < 0.021) in the experimental diet versus the control diet, while it was not affected by defaunation. There was an interaction effect on Zn concentration in rumen fluid. Plasma Na, K and Zn concentrations were not affected by treatments, whereas defaunation significantly decreased (P < 0.048) plasma Fe concentration. Defaunation or N source had no effect on Na, K, Zn and Fe concentrations in wool. We concluded that both defaunation and feeding a diet supplemented with urea and sulfur in place of plant protein sources did not affect blood plasma, except for Fe, and wool Na, K, Zn and Fe concentrations despite differences in their ruminal concentration.