Effects of the Barbell Load on the Acceleration Phase during the Snatch in Elite Olympic Weightlifting [0.03%]
杠铃负荷对精英奥林匹克举重 snatch 加速阶段的影响
Ingo Sandau,Urs Granacher
Ingo Sandau
It was hypothesized that the load-dependent velocity loss at the end of the acceleration phase is primarily associated with a velocity loss during the 1st pull. For this purpose, 14 male elite weightlifters lifted seven load-stages from 70-100% of their personal best in the snatch....A group mean data contrast analysis revealed the highest load-dependent velocity loss for the 1st pull (t = 1.85, p = 0.044, g = 0.49 [-0.05, 1.04]) which confirmed our study hypothesis.
Cleavage of loops 1 and 2 in skeletal muscle heavy meromyosin (HMM) leads to a decreased function [0.03%]
骨骼肌重肌球蛋白(HMM)的第1和第2环的裂解导致其功能下降
Yu-Shu Cheng,Oleg S Matusovskiy,Dilson E Rassier
Yu-Shu Cheng
In this study we investigated the roles of loops 1 and 2 in the regulation of the load-dependent velocity of actin sliding and ATPase activity....Results: The load-dependent velocity of the myosin-propelled actin motility, and the fraction of actin filaments motility, were decreased in close association with the depletion of loop 1 in the HMM....Conclusions: Loop 1 is responsible for regulating the load-dependent velocity of actin motility.
Dynamics of dimeric kinesins: Limping, effect of longitudinal force, effects of neck linker extension and mutation, and comparison between kinesin-1 and kinesin-2 [0.03%]
二聚化动力蛋白的动态行为：蹒跚步态，纵向力的作用，颈部连接器延伸和变异的影响以及动力蛋白1与动力蛋白2之间的比较
Si-Kao Guo,Peng-Ye Wang,Ping Xie
Si-Kao Guo
The intriguing experimental data showing that cysteine-light Drosophila and human kinesin-1 mutants have different load-dependent velocity from the wild-type cases as well as that kinesin-2 dimers have different load-dependent velocity from the kinesin-1 are also explained consistently and quantitatively
Biophysical properties of human β-cardiac myosin with converter mutations that cause hypertrophic cardiomyopathy [0.03%]
人β型心肌球蛋白的生物物理特性及其转换器突变导致肥厚性心肌病
Masataka Kawana,Saswata S Sarkar,Shirley Sutton et al.
Masataka Kawana et al.
Adenosine triphosphatase activities and the load-dependent velocity change profiles of all three mutant proteins are very similar to those of wild type.
Contractility parameters of human β-cardiac myosin with the hypertrophic cardiomyopathy mutation R403Q show loss of motor function [0.03%]
携带肥厚性心肌病突变体R403Q的人β-心脏肌球蛋白的动力学参数显示其失活了运动功能
Suman Nag,Ruth F Sommese,Zoltan Ujfalusi et al.
Suman Nag et al.
The unloaded velocity is, however, ~10% higher for R403Q myosin, resulting in a load-dependent velocity curve that has the characteristics of lower contractility at higher external loads compared to wild type.
Filopodia act as phagocytic tentacles and pull with discrete steps and a load-dependent velocity [0.03%]
丝状伪足充当吞噬作用的触角并以依赖负载的方式分步牵拉细胞
Holger Kress,Ernst H K Stelzer,Daniela Holzer et al.
Holger Kress et al.
Filopodia are thin, spike-like cell surface protrusions containing bundles of parallel actin filaments. So far, filopodial dynamics has mainly been studied in the context of cell motility on coverslip-adherent filopodia by using fluorescenc...