Browsing by Author "Tatar, M."

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The Effect of Schools and Teachers on Student's Achi̇evement
(2006) Tatar, M.
Research that was made by Coleman (1966) and Jencks (1972) caused a pessimistic climate in education world. Because they resulted that family, not schools and teachers, is prominent factor in school achievement. In following years, it was made a lot of research in order to show that schools and teachers can make a difference. In this study, it is resulted that schools and teachers are important and can make a difference.
The Effects of Protein Deficiency on Na, K-Atpase Activity in Rat Kidney
(2008) Donmez, N.; Belge, F.; Yur, F.; Tatar, M.
The aim of the study was to evaluate the effects of protein deficiency on renal Na, K-ATPase activity and cholesterol levels in rats. Wistar rats were used in the study and were fed with a diet variously containing 3%, 12.5% and 25% protein. The results showed that body weight gains in protein deficient groups were lower than control group. Renal Na, K-ATPase activity was significantly higher in control than the protein deficient groups especially in 30 and 45th days (P < 0.05). Renal cholesterol concentrations were significantly lower in both protein deficient groups than in control rats. The results of this study clearly show that protein deficiency in male rats affects renal Na, K-ATPase activity.
Effects of Stress Produced by Adrenocorticotropin (Acth) on Ecg and Some Blood Parameters in Vitamin C Treated and Non-Treated Chickens
(2006) Çinar, A.; Belge, F.; Donmez, N.; Taş, A.; Selçuk, M.; Tatar, M.
The aim of this study was to examine the effects of vitamin C on ECG and some blood parameters in chickens stressed by ACTH. Sixty Leghorn chickens were randomly allotted to control and experimental groups. Prior to the experimental period ECG's were recorded and blood samples were taken from both groups of chickens; some blood parameters were also determined. In the control group, isotonic sodium chloride solution was administered at a dose of 2.5 mL per chicken per day for a period of 5 days. In the experimental group, vitamin C (Redoxon Amp, Roche) was administered intramuscularly at the same dose (containing 250 mg vitamin C) and period of time. On the 5th day of the experiment chickens in both groups received 50 IU ACTH intramuscularly. Three hours following this application ECGs were recorded and blood samples were taken from both groups of chickens; some blood parameters were also determined. In conclusion, sinusoidal tachycardia was observed and an increase was determined (P<0.05) in the level of corticosterone and heterophil/lymphocytes (H/L) ratio after ACTH application in the control group.
Erythrocyte Membrane (na+-K+) Atpase Activities in Some Mammals
(2002) Belge, F.; Donmez, N.; Bildik, A.; Tatar, M.
The erythrocyte membrane the (Na+-K+) ATPase activity was determined in cows, sheep, rabbits and dogs. The (Na+-K+) ATPase activity in erythrocyte membrane was found to be the lowest in sheep and the highest in dogs.
Interaction of High-Energy Proton Beam With a Thin Target and Multiplicities of Neutron
(2007) Demirkol, I.; Arasoǧlu, A.; Tel, E.; Tatar, M.; Şafak, M.S.
An important ingredient in the performance of accelerator driven systems for energy production, waste transmutation and other applications are the number of spallation neutrons produced per incident proton. The neutron multiplicities, angular and energy distributions are usually calculated using simulation codes. We have presented multiplicities of the neutrons emitted in the interaction of a high-energy proton (1500 MeV) with a thin target Pb, Bi. In this study we have used the code ISABEL to calculate multiplicities of the neutron emitted. The results obtained have been compared with the available data. © 2007 American Institute of Physics.