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P-28: Gurkan UA, Moon S, Geckil H, Xu F, Wang S, Lu TJ and Demirci U.Miniaturized lensless imaging systems for cell and microorganism visualization in point-of-care testing. Biotechnology Journal, 2011; 6(2): 138-149.

P-27: Geckil H, Xu F, Xiaohui Z, Moon S-J, Demirci U.Engineering hydrogels as extracellular matrix mimics. Nanomedicine, 2010; 5(3): 469-484.

P-26: Kurt AG , Aytan E, Ozer U, Ates B and Geckil H Production of L-DOPA and dopamine in bacteria bearing Vitreoscilla hemoglobin gene. Biotechnology Journal, 2009 4(7), 1077-1088.

P-25: Aydin S, Karatas F and Geckil H. Simultaneous Quantification of Acylated and Desacylated Ghrelin in Biological Fluids. Biomedical Chromatography, 20008; 22(12): 1354-1359.

P-24: Aydin S, Geckil H, Kilic N, Erman F, Kilic SS and Yesilada O. Is Ghrelin a Natural Anti-Microbial Agent? Turkish Journal of Medical Sciences, 2008; 38(2): 187-187.

P-23: Aydin S*, Geckil H, Karatas F, Donder E, Kumru S, Kavak EC, Colak R, Ozkan Y, Sahin I. Milk and blood ghrelin level in diabetics. Nutrition, 2007; 23(11-12): 807-811.

P-22: Aydin S*, Ozercan IH, Geckil H, Dagli F, Aydin S, Kumru S, Kiliç N, Sahin I, Ozercan MR. Ghrelin is present in teeth. Journal of Biochemistry and Molecular Biology, (2007); 40(3):368-372.

P-21: Aydin S*, Geckil H, Karaoglu A, Elkiran ET. Ghrelin: A novel peptide with therapeutic effect in certain cancers? Medical Hypotheses, (2007); 69(5): 1157-1158.

P-20: Geckil H*, Gencer S, Ates B, Ozer U, Uckun M, Yilmaz I. Effect of Vitreoscilla hemoglobin on production of a chemotherapeutic enzyme, L-asparaginase, by Pseudomonas aeruginosa. Biotechnology Journal, (2006); 1(2): 203-208.

P-19: Aydin S*, Ozercan HI, Aydin S, Ozkan Y, Dagli F, Oguzoncul F, Geckil H. Biological rhythm of saliva ghrelin in humans. Biological Rhythm Research, (2006); 37(2): 169-177.

P-18: Aydin S*, Geckil H, Zengin F, Ozercan HI, Karatas F, Aydin S, Balik DT, Ozkan Y, Dagli F, Celik V. Ghrelin in plants: What is the function of an appetite hormone in plants? Peptides, (2006); 27(7): 1597-1602.

P-17: Ates B, Gencer S, Erenler SO, Uckun M, Ozer U, Yilmaz I, and Geckil H. Production of L-asparaginase, a chemotherapeutic enzyme, in bacteria expressing Vitreoscilla haemoglobin. FEBS JOURNAL, (2006); 273: 139-139.

P-16: Kahraman H, Gencer S, Geckil H. Effect of Vitreoscillaon L-lysine alpha-oxidase, a chemotherapeutic enzyme, from Pseudomonas aeruginosa. FEBS JOURNAL, (2006); 273: 139-140.

P-15: Kahraman H and Geckil H*. Degradation of benzene, toluene and xylene by Pseudomonas aeruginosa engineered with the Vitreoscilla hemoglobin gene. Engineering in Life Sciences, (2005); 5(4): 363-368.

P-14: Geckil H*, Ates B, Durmaz G, Erdogan S, Yilmaz I. Antioxidant, free radical scavenginging and metal chelating characteristics of propolis. American Journal of Biochmemistry and Biotechnology, 2005; 1(1): 27-31.

P-13: Geckil H* Ates B, Gencer S, Uckun M, and Yilmaz I. Membrane permeabilization of Gram-negative bacteria with a potassium phosphate/hexane aqueous phase system for the release of L-asparaginase: an enzyme used in cancer therapy. Process Biochemistry, 2005; 40(2): 573-579.

P-12: Geckil H*, Barak Z, Chipman DM, Erenler SO, Webster DA and Stark BC. Enhanced production of acetoin and butanediol in recombinant Enterobacter aerogenes carrying Vitreoscilla hemoglobin gene. Bioprocess and Biosystems Engineering, 2004; 26(5): 325-330.

P-11: Geckil H*, Arman A, Gencer G, Ates B and Yilmaz HR. Vitreoscilla hemoglobin renders Enterobacter aerogenes highly susceptible to heavy metals. Biometals, 2004; 17(6): 715-723.

P-10: Geckil H*, Gencer S and Uckun M. Vitreoscilla hemoglobin expressing Enterobacter aerogenes and Pseudomonas aeruginosa respond differently to carbon catabolite and oxygen repression for production of L-asparaginase: an enzyme used in cancer therapy.Enzyme and Microbial Technology, 2004; 35(2-3): 182-189.

P-09: Ates B, Yilmaz I, Geckil H*, Iraz M, Birincioglu M, Fiskin K. Protective role of melatonin given either before ischemia or prior to reperfusion on intestinal ischemia-reperfusion damage.Journal of Pineal Research, 2004; 37(3): 149-152.

P-08: Geckil H* and Gencer S. Production of L-asparaginase in Enterobacter aerogenes expressing Vitreoscilla hemoglobin for efficient oxygen uptake. Applied Microbiology and Biotechnology, 2004; 63(6): 691-697.

P-07: Erenler SO, Gencer S, Geckil H*, Stark BC, and Webster DA. Cloning and expression of the Vitreoscilla hemoglobin gene in Enterobacter aerogenes: effect on cell growth an oxygen uptake. Applied Biochemistry and Microbiology, 2004; 40(3): 288-295.

P-06: Geckil H*, Gencer S, Kahraman H, and Erenler SO. Genetic engineering of Enterobacter aerogenes with Vitreoscilla hemoglobin gene: cell growth, survival, and antioxidant enzyme status under oxidative stress. Research in Microbiology, 2003; 154(6): 425-431.

P-05: Munzuroglu O*, Karatas F, and Geckil H. The vitamin and selenium contents of apricot fruit of different varieties cultivated in different geographical regions. Food Chemistry, 2003; 83(2): 205-212.

P-04: Munzuroglu O*, Obek E and Geckil H. Effects of simulated acid rain on the pollen germination and pollen tube growth of apple (Malus sylvestris Miller cv. Golden). Acta Biologica Hungarica, 2003; 54(1): 5-103.

P-03: Yurekli F*, Geckil H, and Topcuoglu F. The synthesis of indole-3-acetic acid by the industrially important white-rot fungus Lentinus sajor-caju under different culture conditions. Mycological Research, 2003; 107(3): 305-309.

P-02: Munzuroglu O* and Geckil H. Effects of metals on seed germination, root elongation, coleoptile and hypocotyl growth in Triticum aestivum and Cucumis sativus. Archives of Environmental Contamination and Toxicology, 2002; 43(2): 203-213.

P-01: Geckil H*, Stark BC, and Webster DA. Cell growth and oxygen uptake of Escherichia coli and Pseudomonas aeruginosa are differently affected by the genetically engineered Vitreoscilla hemoglobin gene. Journal of Biotechnology, 2001; 85(1): 57-66.