Yazar "Ozdemir, S." seçeneğine göre listele
Listeleniyor 1 - 10 / 10
Sayfa Başına Sonuç
Sıralama seçenekleri
Öğe Alpha-amylase production and characterization by a newly isolated Bacillus subtilis under submerged fermentation (SmF)(Wiley-Blackwell Publishing, Inc, 2009) Ozdemir, S.; Guven, K.; Matpan, F.; Baysal, Z.[Abstract Not Available]Öğe Alpha-amylase production by a newly isolated Bacillus subtilis under solid state fermentation using banana husk as substrate(Wiley-Blackwell Publishing, Inc, 2009) Ozdemir, S.; Guven, K.; Baysal, Z.; Demirci, O.[Abstract Not Available]Öğe Antioxidant properties, chemical composition and nutritional value of Terfezia boudieri (Chatin) from Turkey(Sage Publications Ltd, 2012) Dundar, A.; Yesil, O. Faruk; Acay, H.; Okumus, V.; Ozdemir, S.; Yildiz, A.Our objectives were to investigate the chemical composition, nutritive value and antioxidant activity potentials of Terfezia boudieri Chatin collected from different areas from Southeast of Turkey. The amounts of energy, protein, fat, carbohydrate, crude fibre, moisture and ash were 34.00-65.00 (kcal/100 g), 1.40-2.73, 0.86-1.71, 4.84-11.60, 80.86-90.33 (g/100 g, f.w.) and 1.02-1.98 g/100 g dry mass, respectively. Fatty acids and amino acids analyses revealed that linoleic acid and glutamic acid were, respectively the most abundant. Among the essential amino acids leucine was the highest amount and this was followed by threonine. Magnesium was the most abundant element with a concentration value of 182.30 mg/100 g dry mass. T. boudieri exhibited excellent antioxidant activity when compared with standard compounds. In total antioxidant and chelating effect on ferrous ions activity T. boudieri showed the highest activity against the standards. Additionally, at all studied tests antioxidant activity of the mushroom increased with increasing concentration. The total phenolic content of T. boudieri was found as 8.45 mg/g.Öğe Effect of various starches on production of ?-amylase in thermophilic Bacillus licheniformis(Blackwell Publishing, 2008) Matpan, F.; Ozdemir, S.; Gul-Guven, R.; Kaplan, A.; Pirinccioglu, H.; Guven, K.[Abstract Not Available]Öğe Extraction of Cu2+ and Co2+ by using Tricholoma populinum loaded onto Amberlite XAD-4(Springer, 2021) Ozdemir, S.; Kilinc, E.; Poli, A.; Romano, I; Nicolaus, B.; Mustafov, S. D.; Sen, F.In this work, an alternative preconcentration process suggested based on usingTricholoma populinumas a fungal biosorbent for the sensitive preconcentration of Cu(2+)and Co2+. Amberlite XAD-4 was utilized for the loading of the biomass in solid-phase extraction (SPE) procedure. It was found thatT.populinumloaded with XAD-4 resin was a selective biosorbent for the preconcentration of Cu(2+)and Co2+. Experimental variables in SPE procedure such as pH, the flow rate of the sample, type and concentration of eluent, amount ofT.populinumand of XAD-4 resin, sample volume, and potential interfering ion effect were studied. Surface functionalities of the metal-loaded and metal-unloaded biosorbent were determined by comparing Fourier transform infrared spectroscopy spectra and scanning electron microscopy images. Limit of detection values for Cu(2+)and Co(2+)were found as 0.034 and 0.019 ng mL(-1), respectively. The linear range was found as 0.2-15 ng mL(-1)for both analytes. Relative standard deviation values were found as lower than 3.0%. Certified reference materials were applied for process validation, and also, the concentrations of Co(2+)and Cu(2+)were investigated in real water, vegetable, and soil samples. So, the method developed could be utilized for the preconcentrations of Cu(2+)and Co(2+)for routine analysis. This method can be used as an inexpensive and accessible alternative to GF-AAS or ICP-MS methods.Öğe Heavy metal bioaccumulation by thermophilic Bacillus thermoantarcticus and Anoxybacillus amylolyticus(Wiley-Blackwell Publishing, Inc, 2009) Ozdemir, S.; Guven, K.; Kilinc, E.; Demirci, O.; Nicolaus, B.[Abstract Not Available]Öğe Isolation and characterization of ?-Amylase obtained from thermophilic Anoxybacillus sp(Wiley-Blackwell, 2010) Ozdemir, S.; Fincan, S.; Bekler, F. Matpan[Abstract Not Available]Öğe Mutagenicity of essential oils of Coriandrium sativum L. and Cuminum cyminum L. in Salmonella/microsome test(Wiley-Blackwell Publishing, Inc, 2009) Hasimi, N.; Ozdemir, S.; Tolan, V.; Kizil, S.[Abstract Not Available]Öğe Production and partial characterization of alpha amylase by thermophilic Bacillus sp under solid-state fermentation using some agro-residue as substrate(Wiley-Blackwell Publishing, Inc, 2009) Matpan, F.; Ozdemir, S.[Abstract Not Available]Öğe Purification and characterization of thermostable ?-amylase from thermophilic Anoxybacillus flavithermus(Elsevier Sci Ltd, 2014) Fincan, S. Aguloglu; Enez, B.; Ozdemir, S.; Bekler, F. MatpanThis study reports on the purification and characterization of thermostable alpha-amylase (alpha-1-4 D-glucan glucanohydrolase EC 3.2.1.1) from a newly isolated Anoxybacillus flavithennus. A. flavithermus was used, which was isolated from hot water springs of Omer, Afyonkarahisar, Turkey. The gram-positive, spore-forming, motile, moderately thermophilic bacteria were found to be a strain of A. flavithermus analysed by 16S rRNA comparison. The optimal conditions for bacterial growth were determined to be at 20th h, 55 degrees C and pH 6.0. Maximum alpha-amylase activity was obtained at 55 degrees C at pH 7.0 after 24h of incubation. Thermostable alpha-amylase from A. flavithermus was purified by 70% (NH4)(2)SO4 and ion-exchange chromatography (5.2-fold; 65.8% yield). The molecular weight of alpha-amylase was 60 kDa, as estimated by sodium dodecyl sulphate-polyacrylamide gel electrophoresis (SDS-PAGE). The alpha-amylase hydrolyzed soluble starch at 55 degrees C with K-m: 0.005 mM and V-max: 3.5 mu mol min(-1). (C) 2013 Elsevier Ltd. All rights reserved.
