For middle age individuals （male）, it may be difficult to find motivation for suitable exercise training, which has similarly favorable characteristics for cardiovascular adaptations as other exercises performed by ...For middle age individuals （male）, it may be difficult to find motivation for suitable exercise training, which has similarly favorable characteristics for cardiovascular adaptations as other exercises performed by younger individuals. Fifty four （n = 54）; （age = 41.57±3.25） untrained, overweight （F% = 19.52 ± 5.6）, range of （12.6-30.6）, （visceral fat area （VFA） = 111.1 cm^-2） healthy male （they are managers in four different Banks） were taking part in this research program. The participants took part on preliminary cardiac examination （echocardiography, GE Vivid 9 ultrasound machine. Body composition measured with type of ＂InBody720＂ （Biospace Co. Inc., Seoul, South Korea） Bioelectrical Impedance Analyzer （BIA）. The heart rate of the participants was measured continuously during all training sessions using heart rate belts （POLAR Team System, Finland）. Pulmonary gas exchange ＂Cardiosoft＂, （Milwaukee, USA were measured during a standardized treadmill test. Results： In many cases of the free indoor soccer play （FISP） recorded extremely high pulse rate, which is compared with the laboratory high pulse rate （LHPR）, much higher than the recommended physiological load level HR（FISP） 〉 190 beat/min; HR（LHPR） = 175 beat/min ; P 〈 0.001. Despite the many advantages of the Free Indoor Football Play （FISP） are hiding a lot of dangerous in the terms of circulatory adaptation.展开更多
目的 :比较三维可变翻转角快速自旋回波序列(3-dimensional sampling perfection with application optimized contrast using different flip angle evolutions,3D-SPACE)、三维真稳态进动快速成像序列(3D-true fast imaging with stea...目的 :比较三维可变翻转角快速自旋回波序列(3-dimensional sampling perfection with application optimized contrast using different flip angle evolutions,3D-SPACE)、三维真稳态进动快速成像序列(3D-true fast imaging with steady-state precession,3D-True FISP)测量膝关节软骨缺损面积的准确性。方法:选取38例膝关节软骨缺损患者,在1.5 T MRI仪上对比3D-SPACE、3DTrue FISP序列对膝关节软骨的显示质量,并将2组序列测量的缺损软骨面积(52处)与关节镜测量结果进行比较。结果 :3DSPACE、3D-True FISP序列测量的膝软骨缺损面积平均每膝分别为(2.337±0.868)cm2、(1.423±0.560)cm2。3D-SPACE序列比3D-True FISP序列在对膝关节软骨显示质量上更优(P<0.05),且对软骨缺损面积的显示更准确(P<0.05)。结论 :3D-SPACE序列比3D-True FISP序列能更好地显示膝关节软骨,对膝关节缺损软骨面积测量的准确性更高。展开更多
The ZnO quantum dot particles with an average particle size 3 nm and the ZnO nanorods with an average length of 80 nm and width about 14 nm were synthesized by the sol-gel method. The surface photovoltaic properties o...The ZnO quantum dot particles with an average particle size 3 nm and the ZnO nanorods with an average length of 80 nm and width about 14 nm were synthesized by the sol-gel method. The surface photovoltaic properties of ZnO nanoparticles were investigated by means of FISPS technique and the bands in FISPS were identified. The results show that the surface photovoltaic properties of ZnO nanoparticles make a great difference for the structures or sizes due to the quantum confinement effect. The photovoltaic response intensity of ZnO nanorods is two-orders of magnitude stronger than that of quantum dot particles. And it is found that the ZnO quantum dot particles exhibit significant quantum confinement properties of photogenerated charges. The photovoltaic response bands of ZnO nanorods are related to band-band transition and bound exciton transition, respectively.展开更多
In order to investigate the difference of phtotocatalytic properties of TiO2 samples prepared in different pH conditions, TiO2 nanopartieles were prepared in acidic medium and basic medium by a hydrothermal process, r...In order to investigate the difference of phtotocatalytic properties of TiO2 samples prepared in different pH conditions, TiO2 nanopartieles were prepared in acidic medium and basic medium by a hydrothermal process, respectively. The samples were characterized using XRD, TEM, BET, XPS, surface photovoltage spectroscopy （SPS） and field-induced surface photovohage spectroscopy （FISPS）. Effects of temperature and pH in the hydrothermal process on particle sizes, specific surface areas, and photoeatalytic properties of the TiO2 nanoerystalline were investigated. The experimental results indicate that the photocatalysis activity of TiO2 nanoparticles prepared in basic medium （ B-TiO2 ） is superior to that in acidic medium （ A-TiO2 ）, which is ascribed to the difference of surface state between A-TiO2 and B-TiO2.展开更多
文摘For middle age individuals （male）, it may be difficult to find motivation for suitable exercise training, which has similarly favorable characteristics for cardiovascular adaptations as other exercises performed by younger individuals. Fifty four （n = 54）; （age = 41.57±3.25） untrained, overweight （F% = 19.52 ± 5.6）, range of （12.6-30.6）, （visceral fat area （VFA） = 111.1 cm^-2） healthy male （they are managers in four different Banks） were taking part in this research program. The participants took part on preliminary cardiac examination （echocardiography, GE Vivid 9 ultrasound machine. Body composition measured with type of ＂InBody720＂ （Biospace Co. Inc., Seoul, South Korea） Bioelectrical Impedance Analyzer （BIA）. The heart rate of the participants was measured continuously during all training sessions using heart rate belts （POLAR Team System, Finland）. Pulmonary gas exchange ＂Cardiosoft＂, （Milwaukee, USA were measured during a standardized treadmill test. Results： In many cases of the free indoor soccer play （FISP） recorded extremely high pulse rate, which is compared with the laboratory high pulse rate （LHPR）, much higher than the recommended physiological load level HR（FISP） 〉 190 beat/min; HR（LHPR） = 175 beat/min ; P 〈 0.001. Despite the many advantages of the Free Indoor Football Play （FISP） are hiding a lot of dangerous in the terms of circulatory adaptation.
文摘目的 :比较三维可变翻转角快速自旋回波序列(3-dimensional sampling perfection with application optimized contrast using different flip angle evolutions,3D-SPACE)、三维真稳态进动快速成像序列(3D-true fast imaging with steady-state precession,3D-True FISP)测量膝关节软骨缺损面积的准确性。方法:选取38例膝关节软骨缺损患者,在1.5 T MRI仪上对比3D-SPACE、3DTrue FISP序列对膝关节软骨的显示质量,并将2组序列测量的缺损软骨面积(52处)与关节镜测量结果进行比较。结果 :3DSPACE、3D-True FISP序列测量的膝软骨缺损面积平均每膝分别为(2.337±0.868)cm2、(1.423±0.560)cm2。3D-SPACE序列比3D-True FISP序列在对膝关节软骨显示质量上更优(P<0.05),且对软骨缺损面积的显示更准确(P<0.05)。结论 :3D-SPACE序列比3D-True FISP序列能更好地显示膝关节软骨,对膝关节缺损软骨面积测量的准确性更高。
文摘The ZnO quantum dot particles with an average particle size 3 nm and the ZnO nanorods with an average length of 80 nm and width about 14 nm were synthesized by the sol-gel method. The surface photovoltaic properties of ZnO nanoparticles were investigated by means of FISPS technique and the bands in FISPS were identified. The results show that the surface photovoltaic properties of ZnO nanoparticles make a great difference for the structures or sizes due to the quantum confinement effect. The photovoltaic response intensity of ZnO nanorods is two-orders of magnitude stronger than that of quantum dot particles. And it is found that the ZnO quantum dot particles exhibit significant quantum confinement properties of photogenerated charges. The photovoltaic response bands of ZnO nanorods are related to band-band transition and bound exciton transition, respectively.
基金Sponsored by the Key Program Projects of National Natural Science Foundation of China(Grant No. 20431030)the Foundation for Excellent Youth of Heilongjiang University (2005)+2 种基金the Foundation for Youth Science and Technology Innovation Talents of Harbin of China(Grant No.2006RFQXS096)the Key Item Projects of Educational Department of Heilongjiang Province of China(Grant No.1152Z002)Heilongjiang Postdoctoral Funds for Scientific Research Initiation(Grant No.LBH-Q07111)
文摘In order to investigate the difference of phtotocatalytic properties of TiO2 samples prepared in different pH conditions, TiO2 nanopartieles were prepared in acidic medium and basic medium by a hydrothermal process, respectively. The samples were characterized using XRD, TEM, BET, XPS, surface photovoltage spectroscopy （SPS） and field-induced surface photovohage spectroscopy （FISPS）. Effects of temperature and pH in the hydrothermal process on particle sizes, specific surface areas, and photoeatalytic properties of the TiO2 nanoerystalline were investigated. The experimental results indicate that the photocatalysis activity of TiO2 nanoparticles prepared in basic medium （ B-TiO2 ） is superior to that in acidic medium （ A-TiO2 ）, which is ascribed to the difference of surface state between A-TiO2 and B-TiO2.
