Browsing by Author "Kara, M"

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A Combined Method for Estimating Ventilatory Threshold
(Edizioni Minerva Medica, 1999) Kara, M; Gökbel, H; Bediz, CS
Background. The aims of this study were to compare two new methods (D-max and CUSUM) for determination of the ventilatory threshold and to examine the consequences of estimation by application of these methods in combination. Methods. Experimental design: a comparative design was used, Setting: the study was performed in the Exercise Physiology Laboratory in the Faculty of Medicine, Self uh University, Participants: thirty-two untrained males (20.6+/-1.2 yrs) performed an incremental exercise test on a cycle ergometer, Interventions: there is no intervention. Measures: ventilatory and gas exchange variables were measured breath-by-breath. The ventilatory thresholds were detected by conventional linear regression, CUSUM, D-max and combined CUSUM-D-max methods. Results. The ventilatory thresholds determined by D-max method gave the highest r-values compared to the criterion method. There was no statistical difference between thresholds determined by all methods or by the same method using different variables, Ventilatory thresholds could not be determined by the conventional linear regression method in three subjects but were determined in all subjects by the other three methods. Conclusions. Although all methods presented in this study can be used in the determination of ventilatory threshold, the D-max method was found to be the most valid one, When using the CUSUM method, combining it with the D-max method increases the validity of the measurement.
Comparison of the Aerobic Contributions To Wingate Anaerobic Tests Performed With Two Different Loads
(Edizioni Minerva Medica, 1998) Bediz, CS; Gokbel, H; Kara, M; Ucok, K; Cikrikci, E; Ergene, N
Background. The purpose of the present study was to compare the aerobic contribution of the Wingate anaerobic test by increasing the test load and power output. Methods. Setting: The study was performed in the Physiology Department of the Faculty of Medicine, Selcuk University. Participants: Thirty sedentary male university students volunteered to this study. Experiments: The subjects performed two Wingate tests against resistance of 75 g.kg(-1) and 95 g.kg(-1) body weight on Monark 818E bicycle ergometer. Breath-by-breath oxygen consumption rates were measured using an automated metabolic measurement chart (Sensormedics 2900). Aerobic contribution was determined by dividing energy equivalence of net oxygen consumption to the total work. Results. The mean total work values obtained from tests performed at 75 g.kg(-1) and 95 g.kg(-1) loads were 13.9+/-1.5 kjoules and 14.5+/-1.8 kjoules (t=2.32, p=0.03). Mean total oxygen consumptions were 765+/-105 ml and 770+/-110 mi, respectively (t=0.24, p=0.81). Assuming 20 % mechanical efficiency for both tests, aerobic contributions were calculated as 19.5+/-3.7 % and 18.9+/-3.7 %, respectively (t=1.01, p=0.30). Conclusions. Although the power outputs of the two tests were different, the difference between aerobic contributions was not statistically significant. So, it was failed to say that the increase in the power outputs might be related to higher contribution of anaerobic processes. However, if different mechanical efficiencies could be used, relationship between aerobic contributions of two tests might have been different.
The Effects of Some Fungicides on Activity of Eight Serum Enzymes in Vitro
(Marcel dekker inc, 1997) Kara, M; Celik, I
The purpose of the present study was to investigate the effects of Benlate [1-(N-butyl carbomyl), 2-(metoxy carboxyamido)-benzimidazol], Penncozep [mangan-zinc ethylenediamine- bisdithicarbamate], Bayleton [1-(4- chlorophenoxy)- 3,3 -dimethyl-1(1-H-1,2,4 - thiazol -1- yl)- 2.2 - butanon], Cupravit [Cuper oxichloride] and Dithane [Manganese etylenebidithiocarbamate] on human serum enzymes, myocardial creatine kinase (CK-MB), amylase, creatine kinase (CK), aspartate amino transferase (AST), serum glutamyl pruvic transferase(SGPT), alkaline phosphatase (ALK-P), delta glutamyl transferase (GGT-P) and lactate dehydrogenase (LDH), in vitro. Bayleton inhibited only SGPT and it was ineffective on the other seven enzymes. Benlate, Penncozep, Cupravit and Dithane inhibited some enzymes, but activated the others. Benlate as the strongest inhibitor for CK-MB, Cupravit for Amylase, Dithane for ALK-P, Penncozep for CK, AST, SOFT and GGT-P. No inhibition was occurred in LDH. Of the fungicides studied the maximum effective one was Penncozep, the minimum effective one was Bayleton. The most inhibition was shown in SGPT and CK. Cupravit was found as an activator rather than an inhibitor.
Hypoglycemic Effect of Rheum Ribes Roots in Alloxan Induced Diabetic and Normal Mice
(Scandinavian Federation Laboratory Animal Science, 2004) Özbek, H; Ceylan, E; Kara, M; Özgökçe, F; Koyuncu, M
A decoction extract of Rheum ribes roots was given orally and tested for hypoglycemic effect in healthy and in alloxan-diabetic mice. The results were compared with glibenclamide, a standard hypoglycemic agent, and control groups. It was found that the extract possesses a hypoglycemic effect in diabetic animals.
A Short Communication Regarding the Article by M. Kara Et Al - Determination of the Heart Rate Deflection Point by the Dmax Method - Reply
(Edizioni Minerva Medica, 1997) Gokbel, H; Kara, M; Bediz, C