Lejun Wang

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Camptothecin (CPT) and its analogues are a new class of anticancer agents that have been identified over the past several years. Camptothecin exists in two forms depending on the pH: An active lactone form at pH below 5 and an inactive carboxylate form at basic or physiological neutral pH. Poly(lactide-co-glycolide) (PLGA) microspheres have been considered(More)
The aim of this study was to examine coherence and phase synchronization between antagonistic elbow muscles and thus to explore the coupling and common neural inputs of antagonistic elbow muscles during sustained submaximal isometric fatiguing contraction. Fifteen healthy male subjects sustained an isometric elbow flexion at 20 % maximal level until(More)
Based on the high level swimming teams of Tongji University This essay introduces a specific training information system used in swimming which was built by the skill of electrommunication, network communication and database technology. In this system, using the ZigBee transmission technology, a wireless real-time timer technique was adopted and(More)
The rheological properties of α-cellulose 1-allyl-3-methylimidazolium formate solutions were investigated using shear viscosity and dynamic rheological measurements in a large range of concentrations (0.1-10 wt%) at 25 °C. In steady shear measurement, the overlap concentration (c*) and the entanglement concentration (c(e)) were determined to be 0.5 and 2.0(More)
Objective: The objective of this study is to identify the cycling phase by using surface electromyography(sEMG). Methods: Eight professional cyclists participated in this study. Each subject performed a 30-second all-out cycling exercise. The braking torque imposed on cycling motion was 8% of each subject's weight. sEMG of Rectus Femoris(RF), Biceps(More)
Kinematic characteristics and vault features of Tsuhakara3/1 were studied to provide theoretical basis for vault training. Methods: The images of Tsuhakara3/1 in Yang Hak Seon and Feng Zhe's Vault Finals of Asian Games in 2010 were analyzed to get relevant kinematic data. Results and Conclusions: The horizontal velocity of Feng Zhe was higher while touching(More)
Objective The aim of this study was to examine coherence between antagonistic elbow muscles and thus to explore the characteristics of common neural inputs to co-contracting agonistic elbow muscles during sustained isometric fatiguing contraction. Method Ten healthy male subjects participated in this study. With elbow flexion muscle at 50% maximum voluntary(More)
Objective: By analyzing the movement kinematic of Zhang Zhongbo two straight vault cartwheel flip twist 1170°, this paper focus on of technical characteristics of the action, in order to provide a theoretical basis and technical reference to the vault dymnasts and coachers. Methods: Analysis Zhang Zhongbo two exercises for image to obtain kinematic(More)
Objective: This experiment was designed to explore the optimum surface Electromyography (sEMG) indices in evaluating muscle fatigue of Rectus Femoris (RF) caused by all-out cycling exercise. Methods: eight professional cyclists participated in this study. Each subject performed 60-second all-out cycling exercise for one time and the sEMG of RF was recorded(More)
Objective: A study on the kinematic characteristics and Rings features of landing from Rings after the backward giant swing tuck of 2-circle back flip and a 360° turn aims to provide Chinese athletes with certain scientific theories and training practice. Methods: To get relevant kinematic data through the analysis of Yan Mingyong's performance in(More)