Results 71 to 80 of about 38,019 (302)

Mechanochemistry Meets Catalysis: Metal Complexes for Greener Organic Transformations

Angewandte Chemie, EarlyView.
Mechanochemistry is redefining metal catalysis by controlling catalyst formulation, speciation, and deployment. This Review shows how milling, LAG, RAM, and TSE enable rapid metal‐complex assembly, distinctive catalytic manifolds, and scalable synthesis beyond solution chemistry.
Sourav Behera, Francesco Basoccu, Andrea Porcheddu   +2 more
wiley   +2 more sources

A Comparative Study of Theoretical and Experimental Analysis on Balanced and Unbalanced Rotors Supported by Oil- and Water-Lubricated Journal Bearings

Machines
Studying rotor-bearing systems involving fluid film bearings is essential for designing and assessing the dynamic responses and performance of rotating machinery. They are involved in many applications such as pumps, turbines, and engines.
Omar Ahmed, Tamer A. El-Sayed, Hussein Sayed   +2 more
doaj   +1 more source

Tribological Properties of Polyoxymethylene，Polyethylene Terephthalate and Polyetherimide Under Water-Lubricated Conditions [PDF]

Cailiao Baohu
To tackle environmental issues caused by traditional oil-lubricated bearings，water-lubricated bearings are increasingly used in clean energy equipment. However，water’ s low viscosity often leads to lubrication film rupture，causing bearings to operate in ...
HOU Zhihao, GUO Zhiwei, WU Zumin, YUAN Chengqing
doaj   +1 more source

Development of porous ceramic air bearings [PDF]

, 2001
Porous air bearings enjoy some important advantages over conventional air bearing types such as increased load carrying capacity, higher stiffness and improved damping.
Roach, C.J., Roach, Christopher James
core  

Design, Development and Testing of Water-Lubricated Ceramic Journal Bearing

, 2017
Strong shear force developed in the fluid film as the water-lubricated hybrid bearing operates at high speeds. Thus the phenomena of shaft expanding outward and bearing contracting inward happened due to the increasing temperature of the fluid film ...
Jianlei Wang, Jun Zha, Kejia Liu, Yaolong Chen   +3 more
core   +1 more source

Bioadhesive Hydrogel With Polyphenol‐Armored Nanogene Rejuvenates Chondrocyte Senescence for Aged Osteoarthritis Therapy

Advanced Science, EarlyView.
An adhesive hydrogel depot with polyphenol‐armored nanogenes is developed for treating aged osteoarthritis. This system maintains miR‐140 bioactivity, prolongs its intra‐articular retention, and enhances transfection into chondrocytes, leading to the downregulation of senescence‐associated pathways.
Liwei Yan, Runze Yang, Ting Zhou, Tianhao Xu, Yongqi Li, Yuelin Hu, Minghao Ge, Lei Zhang, Xiong Lu, Chaoming Xie, Weili Fu   +10 more
wiley   +1 more source

Pressure Distribution in a Porous Squeeze Film Bearing Lubricated with a Herschel-Bulkley Fluid

, 2016
The influence of a wall porosity on the pressure distribution in a curvilinear squeeze film bearing lubricated with a lubricant being a viscoplastic fluid of a Herschel-Bulkley type is considered.
A. Walicka, Walicka, A., P. Jurczak, Jurczak, P.   +3 more
core   +1 more source

Remote Magnetomechanical Neuromodulation Uncovers Therapeutic Mechanisms for Alleviating Parkinsonian Symptoms in Freely Moving Mice

Advanced Science, EarlyView.
Magnetomechanical neuromodulation using magnetic nanodiscs enables remote activation of neurons. In a hemiparkinsonian mouse model, alternating magnetic fields actuate the nanodiscs to generate torque that opens mechanosensitive ion channels within the subthalamic nucleus, thereby modulating basal ganglia motor circuitry.
Anouk Wolters, Lorenzo Signorelli, Christian Herff, Sophia Gimple, Renzo Riemens, Gunter Kenis, Kim Rijkers, Hamed Shabani, Jyh‐Jang Sun, Yasin Temel, Hans Clusmann, Danijela Gregurec, Sarah‐Anna Hescham   +12 more
wiley   +1 more source

Analytical expressions of friction-induced self-excited vibration amplitudes of the marine rubber bearing-shaft system

Journal of Low Frequency Noise, Vibration and Active Control
By the analytical method, this paper investigates the mode-coupling friction-induced instability and the resulting stick-slip self-excited vibration of the marine stern water-lubricated rubber bearing-shaft system.
Chuang Wu, Dejiang Shang, Yan Xiao, Chao Zhang, Yongwei Liu   +4 more
doaj   +1 more source

Comparison of 4-ball and 5-ball rolling contact fatigue tests on lubricated Si3N4/steel contact

, 2003
Accelerated four-ball and five-ball rolling tests were performed on HIPed Si3N4 ball samples (rough lapped with surface roughness value Ra0.08 μm and Rq0.118 μm) in fully lubricated condition.
Kang, J, Hadfield, M
core