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Articles by Ahmet KOC
Total Records ( 2 ) for Ahmet KOC
  Ramazan Gonenci , Muhammed Enes Altug , Ahmet Koc , Huseyin Oksuz and Hayati Yuksel
  The Bovine Amniotic Membrane (BAM) was transplanted on the right cornea of 8 adult rabbits after an alkali burn was created with 2.5 N NaOH. Density and area of the corneal opacity, area of the corneal epithelial defect, vascularization and complications were clinically evaluated. Left corneas of the same animals were used as active control group. At the end of the experiment, all the eyes were extirpated and histologically examined on light microscopy. BAM has decreased density and area of the corneal opacity and increased reepithelialisation, but promoted episcleral vasodilatation more prominently in clinical examination. Histologically; the distrubition of Polymorphonuclear (PMN) leucocytes, corneal thicknesses, edema, keratinization, neovascularization and inflammation were significantly reduced by BAM compared to active control group. BAM was highly found to be effective to restore the corneal surface with acute alkali burns in the rabbit.
  Ahmet Emin ATIK , Gonensin Ozan BOZDAG , Ersin AKINCI , Alaattin KAYA , Ahmet KOC , Talat YALCIN and Huseyin Caglar KARAKAYA
  Boron is an essential micronutrient for plants and animals; however, it can be toxic when present at high concentrations. The purpose of this study was to understand the mechanisms of boron tolerance in the Turkish barley (Hordeum vulgare) Anadolu cultivar. For this purpose, 2−dimensional electrophoresis (2−DE) was used to screen differentially expressed proteins for both control and boron−stressed Anadolu barley genotypes. Seven proteins were revealed by 2−DE: 1) ribulose 1,5−bisphosphate carboxylase/oxygenase (RuBisCo large chain), 2) TLP5, a thaumatin−like protein, 3) PR5, a basic pathogenesis−related protein, 4) a RNase S−like protein, 5) a PSI type III chlorophyll a/b−binding protein, 6) a light−harvesting complex I LHC I, and 7) the vacuolar proton−translocating ATPase subunit E protein. These were found to be upregulated in response to boron treatment. Even though the protein encoded by the V−ATPase subunit E gene was overexpressed, its transcript level was downregulated by boron treatment. Heterologous expression of the barley V−ATPase subunit E gene in yeast provided boron resistance to yeast cells. These results indicated that the V-ATPase subunit E gene was functional and conferred tolerance to toxic boron levels in yeast and might play a role in the overall boron tolerance of barley.
 
 
 
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