The aim of presented study is to compare parameters of oxidative stress in untrained volunteers, patients with chronic, non-motor related disease (dialysis patients) and professional athletes before and after exhausti...The aim of presented study is to compare parameters of oxidative stress in untrained volunteers, patients with chronic, non-motor related disease (dialysis patients) and professional athletes before and after exhaustive exercise. 40 subjects participated in the study: 14 healthy, untrained subjects, 12 hemodialysis patients and 14 professional rowers. Superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx) and non-transferrin bound iron (NTBI) were determined before and after exercise. Dialysis patients have increased oxidative stress at rest with highest NTBI, and show adaptation with increased values of GPx and decreased SOD. Professional athletes have low level of oxidative stress at basic circumstances with lowest NTBI, SOD, CAT and GPx as compared to untrained volunteers and dialysis patients. After strenuous exercise elevation of antioxidative enzymes is observed only in athletes, but not in untrained and dialysis patients. Due to limited antioxidative capacity, extreme physical effort is probably not recommended to dialysis patients and untrained people.展开更多
To solve the problem that utilizing an air rower lowers indoor air quality due to the dust stirred up in the course of rowing, an air rower is designed to have the extra function of air purifying. The designed rower i...To solve the problem that utilizing an air rower lowers indoor air quality due to the dust stirred up in the course of rowing, an air rower is designed to have the extra function of air purifying. The designed rower is composed of six parts, which are the frame, air generator, transmission part, air purifying filter cartridge, performance monitor, and electric motor. To fulfill the task, the filter cartridge is vertically arranged to lead the air to enter from the lower part and vent out of the upper part to filter and purify the air before it enters the generator so as that the indoor air is well circulated to improve the air purification effect when the rower is utilizing. The modular detachable design allows the air filter and electric motor to be installed and disassembled to adapt to different air purification needs. The designed rower has the benefit of lower purchasing cost and energy saving that may motivate exercising, bringing more fun and the sense of accomplishment.展开更多
Although there are many reports on the resonant absorption and the second harmonic of laser plasma in recent years, these phenomena were treated individually and no study on their interaction has been carried out. We ...Although there are many reports on the resonant absorption and the second harmonic of laser plasma in recent years, these phenomena were treated individually and no study on their interaction has been carried out. We used a Nd: glass laser （3—6 Joules, 100 ps pulses） to irradiate plane aluminium targets with a power density of —1015 W/cm2 on the tartar surface.展开更多
文摘The aim of presented study is to compare parameters of oxidative stress in untrained volunteers, patients with chronic, non-motor related disease (dialysis patients) and professional athletes before and after exhaustive exercise. 40 subjects participated in the study: 14 healthy, untrained subjects, 12 hemodialysis patients and 14 professional rowers. Superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx) and non-transferrin bound iron (NTBI) were determined before and after exercise. Dialysis patients have increased oxidative stress at rest with highest NTBI, and show adaptation with increased values of GPx and decreased SOD. Professional athletes have low level of oxidative stress at basic circumstances with lowest NTBI, SOD, CAT and GPx as compared to untrained volunteers and dialysis patients. After strenuous exercise elevation of antioxidative enzymes is observed only in athletes, but not in untrained and dialysis patients. Due to limited antioxidative capacity, extreme physical effort is probably not recommended to dialysis patients and untrained people.
文摘To solve the problem that utilizing an air rower lowers indoor air quality due to the dust stirred up in the course of rowing, an air rower is designed to have the extra function of air purifying. The designed rower is composed of six parts, which are the frame, air generator, transmission part, air purifying filter cartridge, performance monitor, and electric motor. To fulfill the task, the filter cartridge is vertically arranged to lead the air to enter from the lower part and vent out of the upper part to filter and purify the air before it enters the generator so as that the indoor air is well circulated to improve the air purification effect when the rower is utilizing. The modular detachable design allows the air filter and electric motor to be installed and disassembled to adapt to different air purification needs. The designed rower has the benefit of lower purchasing cost and energy saving that may motivate exercising, bringing more fun and the sense of accomplishment.
文摘Although there are many reports on the resonant absorption and the second harmonic of laser plasma in recent years, these phenomena were treated individually and no study on their interaction has been carried out. We used a Nd: glass laser （3—6 Joules, 100 ps pulses） to irradiate plane aluminium targets with a power density of —1015 W/cm2 on the tartar surface.
