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Dimensions of the functional degrees of freedom of the first serve in tennis.
J Sports Sci
March 2025
Cardiff School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff, UK.
We examined the influence of court side and target location of the ball on the coordination and control of the tennis serve. Five male and five female experienced players performed 10 'first-serves' to centre and wide targets. 3D kinematics of the service were analysed from two frames of reference: joint position (v) and joint angle (ω) with emphasis on the qualitative aspects of movement coordination.
View Article and Find Full Text PDFSlippery liquid infused porous surface (SLIPS) condensers for high efficiency air gap membrane distillation.
Commun Eng
March 2025
School of Mechanical Engineering and Birck Nanotechnology Center, Purdue University, West Lafayette, IN, 47907, USA.
To address growing water scarcity, we must improve the energy efficiency of thermal desalination technologies such as air gap membrane distillation. However, promising functional materials such as slippery liquid infused porous surfaces have not yet implemented for any desalination technology. Here, we fabricate and test slippery liquid infused porous surfaces (using Krytox 16,256 lubricant and CuO nanostructures) in an air gap membrane distillation apparatus.
View Article and Find Full Text PDFThe membrane-proximal external region of human immunodeficiency virus (HIV-1) envelope glycoprotein trimers in A18-lipid nanodiscs.
Commun Biol
March 2025
Center for Quantitative Biology, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, China.
During human immunodeficiency virus (HIV-1) entry, the metastable pretriggered envelope glycoprotein (Env) trimer ((gp120/gp41)) opens asymmetrically. We present cryo-EM structures of cleaved asymmetric Env trimers in amphipol-lipid nanodiscs. The gp41 membrane-proximal external region (MPER) could be traced in Env protomers that remained close to the nanodisc despite Env tilting.
View Article and Find Full Text PDFInfluence of 3D printing angles on the accuracy of indirect adhesion transfer models: an in vitro study.
Sci Rep
March 2025
Department of Stomatology, Affiliated Hospital of Jiangnan University, 1000 Hefeng Road, Wuxi, 214000, China.
The aim of this study was to evaluate the effect of different Angle printing on the model on the printing platform and whether it affects the later transfer accuracy. Ten bracket transfer models were printed on the platform of the 3D printer in four ways: 0° without support rod, 0°, 45° and 90° with support rod. Transfer guide plates for transfer brackets were made using PVS.
View Article and Find Full Text PDFDevelopment of poly(lactic acid)/polyvinyl alcohol-based temperature-responsive shell-core nanofibers: Controlled release, biosafety evaluation, and application in raspberry preservation.
Int J Biol Macromol
March 2025
State Key Laboratory of Tree Genetics and Breeding, Co-Innovation Center for Sustainable Forestry in Southern China, College of Forestry and Grassland, Nanjing Forestry University, Nanjing 210037, Jiangsu,China. Electronic address:
With the increasing demand for sustainable and effective food preservation methods, the development of novel smart preservation materials has become a pressing need. A temperature-responsive smart nanofiber material with a shell-core structure, polyvinyl alcohol/poly(N-isopropylacrylamide)/polylactic acid/lemon essential oil (PPPL), was developed by incorporating lemon essential oil as a core-layer preservative and poly(N-isopropylacrylamide) as a temperature-responsive shell layer. Transmission electron microscopy confirmed the shell-core structure of the fibers.
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