scholarly journals Diel Rhythms of Oxygen Consumption and Activity Level of Juvenile Flounder Paralichthys olivaceus

1997 ◽  
Vol 63 (5) ◽  
pp. 655-658 ◽  
Author(s):  
Haijin Liu ◽  
Yasunori Sakurai ◽  
Hiroyuki Munehara ◽  
Kenji Shimazaki
Keyword(s):  
Oxygen Consumption ◽  
Paralichthys Olivaceus ◽  
Activity Level ◽  
Diel Rhythms

scholarly journals Oxygen Consumption of Larval Flounder Paralichthys olivaceus Measured by an Improved Water Bottle Method

1995 ◽  
Vol 61 (1) ◽  
pp. 7-10 ◽  
Author(s):  
Hisashi Kurokura ◽  
Tamayo Matsumoto ◽  
Kenji Namba ◽  
Shigeru Aoki
Keyword(s):  
Oxygen Consumption ◽  
Paralichthys Olivaceus ◽  
Water Bottle

scholarly journals EFFECT OF PROPRANOLOL ON AEROBIC-HEMODYNAMIC SUPPORT OF PHYSICAL ACTIVITY IN PATIENTS WITH EFFORT ANGINA, POSITIVE ANTIANGINAL ACTION AND THE ABSENCE OF CLINICAL EFFECT AFTER PROPRANOLOL-BASED TREATMENT

2019 ◽  
Vol 34 (1) ◽  
pp. 118-123
Author(s):  
A. P. Vasilyev ◽  
N. N. Streltsova
Keyword(s):  
Physical Activity ◽  
Oxygen Consumption ◽  
Physical Exercise ◽  
Clinical Effect ◽  
Activity Level ◽  
Oxygen Extraction ◽  
Myocardial Oxygen Demand ◽  
Effort Angina ◽  
Physical Effort ◽  
Group 2

Aim. To analyze the changes in the aerobic-hemodynamic parameters during physical exercise in patients with effort angina administered with reference non-selective beta-blocker propranolol (Obsidan) with positive antianginal action and the absence of clinical effect after the drug intake.Material and Methods. A total of 58 patients (mean age of 54.2 [48.5; 59.5] years) with effort angina of functional class II–IV were examined with spiro-veloergometry tests before and after administration of propranolol (Obsidan: manufactured by Isis Pharma GmbH, Germany) at a dose of 40 mg. At threshold physical activity the following parameters were assessed: oxygen consumption (VO2 ), specific oxygen consumption, cardiac index (CI), rate pressure product (RPP); total peripheral vascular resistance (TPVR), arteriovenous oxygen difference (a-vDО2 ) and mechanical work of the heart (HW).Results. The efficacy of single-dose obsidian was observed in 58.6% of patients with angina (group 1); in this, tolerance to physical exercise increased from 50.0 [25.0; 75.0] W to 75.0 [50.0; 100.0] W. In the rest of patients (group 2), no antianginal effect was registered. At the first stage (at initial threshold physical activity level), administration of propranolol was characterized by saving pattern of heart function: statistically significant decrease in the heart rate, mean arterial pressure, CI and HW. This naturally resulted in reduction of myocardial oxygen demand (decrease in RPP from 163.0 [134.5; 218.5] U to 102.0 [90.0; 142.5] U; p<0.001) and predetermined the drug anti-ischemic action. At the second stage (maximum physical effort), an increase in the physical activity, caused by increase in VO2 from 738.0 [604.5; 1148.0] mL/min to 972.0 [774.5; 1458.0] mL/min, occurred due to higher oxygen extraction from peripheral blood (a-vDО2 increase; p<0.002). In group 2, despite the absence of an increase in tolerance to physical exercise, administration of propranolol was characterized by low RPP threshold i.e. the physical effort similar to the initial level was performed at a lower cardiac energy consumption.Conclusion. Therefore, anti-ischemic effect of Obsidan was due to a decrease in theenergy expenditure of the cardiac function along with a limitation in the hemodynamic productivity efficiently compensated by an increase in the oxygen extraction from circulating blood during physical activity.

scholarly journals The effect of microplastics on the growth of Paralichthys Olivaceus

2021 ◽  
Vol 251 ◽  
pp. 02040
Author(s):  
Hui Lu ◽  
Liuqingqing Liu
Keyword(s):  
Oxygen Consumption ◽  
Treatment Group ◽  
Oxygen Consumption Rate ◽  
Consumption Rate ◽  
Paralichthys Olivaceus ◽  
Marine Ecosystem ◽  
Hydrophobic Surface ◽  
The Body ◽  
Global Environmental Issue ◽  
Average Size

In recent years, microplastics (MPs) pollution have become a global environmental issue, which aroused concern about their potential toxicity to marine organisms. However, due to the gradual depletion of natural resources, it had been rapidly developed in aquaculture. Therefore, this article studied the effect of polystyrene (PE) on the growth of Paralichthys Olivaceus. The surface of PE was rough and average size was 197.3 ± 11.2 μm. The contact angle of PE was 100.3 ± 2.5 °, which indicated that PE had a hydrophobic surface. PE exposure had no significant effect on the body length growth of fish, but compared with CK treatment, the weight growth of fish in PE treatment group was slower, which increased by 36.3% on the 28th day, but only increased by 10.9% in PE treatment group, indicating that PE could inhibit the growth of fish. PE led to the decrease of oxygen consumption rate of fish. On the 7th, 21st and 28th day, the oxygen consumption rate of fish decreased by 7.9%, 25.4% and 41.1%, respectively. Based on the above results, we concluded that marine MPs could inhibit the growth of the benthic economic fish, which would disturb the balance of the marine ecosystem.

scholarly journals Self-reported physical activity level does not alter whole-body total heat loss independently of aerobic fitness in young adults during exercise in the heat

2019 ◽  
Vol 44 (1) ◽  
pp. 99-102 ◽  
Author(s):  
Dallon T. Lamarche ◽  
Sean R. Notley ◽  
Martin P. Poirier ◽  
Glen P. Kenny
Keyword(s):  
Physical Activity ◽  
Young Adults ◽  
Oxygen Consumption ◽  
Heat Loss ◽  
Aerobic Fitness ◽  
Total Heat ◽  
Activity Level ◽  
Peak Oxygen Consumption ◽  
Whole Body ◽  
Total Heat Loss

We evaluated whether self-reported physical activity (PA) level modulates whole-body total heat loss (WB-THL) as assessed using direct calorimetry in 10 young adults (aged 22 ± 3 years) matched for rate of peak oxygen consumption (an index for aerobic fitness), but of low and high self-reported PA, during 3 incremental cycling bouts (∼39%, 52%, and 64% peak oxygen consumption) in the heat (40 °C). We showed that level of self-reported PA does not appear to influence WB-THL independently of peak oxygen consumption.

Myocardial Oxygen Consumption Index in Patients with Coronary Artery Disease

2005 ◽  
Vol 13 (1) ◽  
pp. 34-37 ◽  
Author(s):  
Arash Arya ◽  
Majid Maleki ◽  
Fereydoon Noohi ◽  
Ebrahim Kassaian ◽  
Farideh Roshanali
Keyword(s):  
Blood Pressure ◽  
Coronary Artery Disease ◽  
Heart Rate ◽  
Oxygen Consumption ◽  
Coronary Artery ◽  
Myocardial Oxygen Consumption ◽  
Activity Level ◽  
Home Based ◽  
Consumption Index ◽  
Artery Disease

One hundred and thirty-six men with coronary artery disease were randomly assigned to a hospital-based or home-based exercise program of 3 sessions per week. A treadmill test was carried out with the modified Naughton protocol. After 3 months, 125 patients (92%) with a mean age of 55 ± 11 years had completed the study. Maximum workload achieved increased by 65% [(12.40 ± 1.32 vs. 7.50 ± 0.85 metabolic equivalent units (METs)] in the hospital-based group, and by 17% (8.86 ± 0.9 vs. 7.56 ± 0.78 METs) in the home-based group ( p = 0.0001). The heart rate-blood pressure product, an index of myocardial oxygen consumption, decreased at rest by 19% in the hospital-based group but was unchanged in the home-based group ( p = 0.0001). The heart rate-blood pressure product at 5 and 7 METs activity level decreased 28% and 26%, respectively, in the hospital-based group vs. 8% and 2% in the home-based group ( p = 0.0001). It was concluded that hospital-based exercise training in patients with coronary artery disease improves functional capacity and decreases the myocardial oxygen consumption index at rest and during exercise.

Sign in / Sign up

Export Citation Format

Share Document