INTRODUCTION The formation and collapse of vapor-filled bubbles near a mechanical heart valve is called cavitation. Microbubbles can be detected in vivo by doppler ultrasonography (USG) as HITS (high intensity transient signals) in cranial circulation. We investigated the relationship between exercise induced heart rate increase and HITS formation in cranial circulation. MATERIAL AND METHODS ...

The effect of abscisic acid on growth, respiration, the ATP pool, and rate and amount of RNA synthesis in aseptically cultured axes of Phaseolus vulgaris during the first 24 hours of germination has been measured in experiments where the duration of abscisic acid application and its concentration have been varied. At concentrations from 10(-7) to 10(-4)m, abscisic acid inhibits synthesis of RNA...

OBJECTIVE to determine the effects of aerobic training on the maximal aerobic power of healthy, very elderly people. DESIGN a 12-week control period followed by 24 weeks of progressive, weight bearing, aerobic training. SUBJECTS 26 men and women aged 79 to 91 years conforming to pre-determined health criteria. METHODS we took measurements before and after a 12 week control period and foll...

retinol binding protein4 (rbp4) is a type of adipokine which transports vitamin a to serum. rbp4 could be a bridge between obesity and insulin resistance. this study aimed to investigate the effects of aerobic exercises on rbp4 serum's concentration and metabolic syndrome risk factors in obese women.twenty obese women with body max index 35.81±3.67kg/m2, fat percentage 43.98±4.02, and waist to ...

Maximal exercise heart rate (HRmax) is reduced after acclimatization to hypobaric hypoxia. The low HRmax contributes to reduce maximal cardiac output (Qmax) and may limit maximal O2 uptake (VO2max). The objective of these experiments was to test the hypothesis that the reduction in Qmax after acclimatization to hypoxia, due, in part, to the low HRmax, limits VO2max. If this hypothesis is correc...

BACKGROUND In professional soccer, a significant amount of training time is used to improve players' aerobic capacity. However, it is not known whether soccer specific training fulfils the criterion of effective endurance training to improve maximal oxygen uptake, namely an exercise intensity of 90-95% of maximal heart rate in periods of three to eight minutes. OBJECTIVE To determine whether ...

background: in the field of cellular therapy, the impact of confluence degree on harvesting or differentiation of bmmscs and the effect of cell-to-cell contact remain controversial. therefore, the effect of confluence on properties of bmmscs was studied and efficiency of confluence-associated osteogenic differentiation was identified. materials and methods: the impact of 20, 50, 70, 80 and 100%...