Makale Koleksiyonu
Recent Submissions
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Mathematics teachers’ covariational reasoning levels and predictions about students’ covariational reasoning abilities
(2010)Various studies suggest that covariational reasoning plays an important role on understanding the fundamental ideas of calculus and modeling dynamic functional events. The purpose of this study was to investigate a group ... -
Understanding prospective teachers’ mathematical modeling processes in the context of a mathematical modeling course
(Modestum, 2017)This paper investigates how prospective teachers develop mathematical models while they engage in modeling tasks. The study was conducted in an undergraduate elective course aiming to improve prospective teachers’ ... -
Six hat thinking technique in program evaluation: the evaluation of the quality of mathematics teacher training program in Turkey
(2016)In this research, the aim was to get the primary school mathematics teacher training program evaluated by the prospective teachers by using the six hat thinking technique. In this study, phenomenology, which is a qualitative ... -
Cognitive maps of the beliefs of pre-service mathematics teachers regarding mathematics: a phenomenological research
(2019)This study investigates the beliefs of pre-service mathematics teachers (PMTs) regarding mathematics through plotting their cognitive maps. The PMTs’ beliefs regarding the nature of mathematics, and teaching and learning ... -
Düzlemsel Bezier Eğrilerinin S(2) denklik şartları
(2017)Bu çalışmada R2 de vektörlerden oluşan iki sistemin, yine R2 de tüm benzerlik dönüşümlerinin grubu olan G=S(2) grubuna göre denklik şartlarının; bu vektörlerin G-invaryant rasyonel fonksiyonlar cismi olan R(x1 , x2 , ... -
LS(2)− Equivalence conditions of control points and application to planar Bezier curves
(BİSKA Bilisim Company, Yildiz Technical University, Teknopark, 2017)Having an important role in CAD and CAM systems the Bezier and B- spline curves and surfaces and NURBS modelling are based on control points belongs to these curves and surfaces. So the invariants of these curves and ... -
On the line congruences
(Kazım İlarslan, 2018)The purpose of this paper is to find the quantities and surfaces of a line congruence via examining it in the dual space and to represent the results more appropriately for computational approximations. For this, we take ... -
Optimization of removal conditions of copper ions from aqueous solutions by Trametes versicolor
(Elsevier, 2010)A multi-step response surface methodology was successfully applied to optimize the biosorption conditions for the maximum removal of Cu(II) ions from aqueous solutions using Trametes versicolor fungi as a biosorbent. In ... -
Determination of heavy metals and comparison to gross radioactivity concentration in soil and sediment samples of the Bendimahi River Basin (Van, Turkey)
(SpringerLink, 2009)An investigation of radioactivity and some heavy metal distribution in soil and sediment of the river basin (Bendimahi River, Van-Turkey) was conducted in two seasons of 2005. The samples of soil and sediment were ... -
Gross alpha and beta radioactivity concentration in water, soil and sediment of the Bendimahi River and Van Lake (Turkey)
(Springerlink, 2009)The concentrations of the natural radioactivity in water, soil and sediment samples collected from Bendimahi River which originates near the Tendürek Mountain (Van, Turkey), its tributaries and Van Lake (Turkey) were ... -
An approach for prediction of optimum reaction conditions for laccase-catalyzed bio-transformation of 1-naphthol by response surface methodology (RSM)
(Elsevier, 2008)Response surface methodology (RSM) was successfully applied to enzymatic bio-transformation of 1-naphthol. The experiments were conducted in a closed system containing acetone and sodium acetate buffer, with laccase enzyme. ... -
Assessment of some trace heavy metals and radioactivity concentration in water of Bendimahi River Basin (Van, Turkey)
(Springerlink, 2008)The levels of heavy metals were determined in the water of Bendimahi River Basin, statistically analysed and compared to natural gross radioactivity concentration. Fifteen samples of water were collected from Bendimahi ... -
Sorbtion of aniline onto organophilic sepiolite
(Oriental Scientific Publishing Company, 2007)In this study, sepiolite was modified with nitric acid, ethylene diamine tetra acetic acid and hexa decyl trimethyl ammonium. The changes on the surfaces of sepiolite samples were studied in the IR spectroscopy. Pure and ... -
Adsorption of dark compounds with bentonites in apple juice
(Elsevier, 2007)The adsorption equilibrium of dark-coloured compounds from apple juice has been investigated as a function of several variables including activation conditions of bentonite (heat and acid treatments), clay concentrations ... -
Equilibrium and kinetic studies for the sorption of 3-methoxybenzaldehyde on activated kaolinites
(Elsevier, 2007)The sorption of 3-methoxybenzaldehyde on activated kaolinites has been investigated at different temperatures. Two types of activation tests were performed. The sorption equilibrium was studied by sorption isotherms in ... -
Adsorption of aniline, phenol, and chlorophenols on pure and modified bentonite
(Springerlink, 2006)In the present study, pure bentonite and bentonite modified by HNO 3 , EDTA, and HDTMA are adsorbents. The changes on the surfaces of bentonite samples are studied by IR spectroscopy. The adsorption of aniline, phenol, ... -
Dissolution kinetics of calcined ulexite in ammonium chloride solutions
(Asian Publication Corporation, 2006)In this study, the leaching kinetics of calcined ulexite in ammonium chloride solutions were investigated. The effect of calcination temperature, solution concentration, reaction temperature and prehydration were chosen ... -
Application of natural kaolin as support for the immobilization of catalase from bovine liver
(Asian Publication Corporation, 2006)Catalase from bovine liver was immobilized on to natural kaolin by physical adsorption method. About 80% of the protein content was immobilized on to support. The activities of immobilized catalase were determined in the ... -
Application of natural kaolin as support for the immobilization of catalase from bovine liver
(Asian Publication Corporation, 2006)Catalase from bovine liver was immobilized on to natural kaolin by physical adsorption method. About 80% of the protein content was immobilized on to support. The activities of immobilized catalase were determined in the ... -
Effects of some drugs on enzyme activity of catalase from bovine liver
(Asian Publication Corporation, 2006)The effects of gentamicin sulphate, acetyl salicylic acid, ampicillin sodium, paracetamol, potassium penicillin and augmentin were investigated on the in-vitro enzyme activity of catalase. Catalase (CAT:EC1.11.1.6) was ...