Results 81 to 90 of about 2,252,931 (356)

A Different Perspective on the Solid Lubrication Performance of Black Phosphorous: Friend or Foe?

Advanced Engineering Materials, EarlyView.
Researchers investigate black phosphorous (BP) as a standalone solid lubricant coating through ball‐on‐disc linear‐reciprocating sliding experiments in dry conditions. Testing on different metals shows BP doesn't universally reduce friction and wear. However, it achieves 33% friction reduction on rougher iron surfaces and 23% wear reduction on aluminum.
Matteo Vezzelli, Manel Rodríguez Ripoll, Sabine Schwarz, Ali Erdemir, Maria Clelia Righi, Carsten Gachot   +5 more
wiley   +1 more source

El trabajo a turnos como factor de riesgo para lumbago en un grupo de trabajadores peruanos.

Revista Médica Herediana, 2005
Objetivo: Identificar la asociación entre trabajo a turnos y lumbago en un grupo de trabajadores mineros. Materiales y métodos: Estudio Caso Control realizado el año 2003 en un grupo de trabajadores mineros. Se revisaron las historias electrónicas de los
Juan Carlos Palomino Baldeon, Fermín Ruíz Gutierrez, Gian Navarro Chumbes, Félix Dongo Lazo, Carlos Llap Yesan, Raúl Gomero Cuadra   +5 more
doaj  

Wheat straws-derived hierarchical porous carbon as electrode material for supercapacitor

Discover Electronics
Hierarchical porous carbon materials hold great potential in electrochemical energy storage, yet their efficient fabrication still faces numerous challenges. Herein, we successfully prepared hierarchical porous carbon materials with high specific surface
Zhenjuan Zang, Xiaolong Zhang, Baoshan Xia, Kelong Cao, Jinfeng Li, Qingguo Chen   +5 more
doaj   +1 more source

Study of crevice-galvanic corrosion of aluminum [PDF]

, 1967
Corrosion effects of aluminum-copper and aluminum-nickel couples in oxygenated distilled water, and aluminum alloys in oxygenated copper sulfate solution were studied. One of each of the couples had a water tight seal, and showed no substantial corrosion,
Draley, J. E., Loess, R. E., Mori, S.
core   +1 more source

Tribology of ZrC Coatings and Spherical Tips Acquired with Extraordinarily Stiff, Metal Atomic Force Microscopy Probes

Advanced Engineering Materials, EarlyView.
In this research, ZrC coatings are evaluated against various counterprobes at the microscale using novel super‐stiff atomic force microscopy cantilevers. The chemical composition of the coating is shown to be an important factor influencing coating hardness and Young's modulus, while surface roughness, counterprobe hardness, and surface energy are the ...
Piotr Jenczyk, Marcin Michałowski, Bogdan Warcholiński, Michał Milczarek, Adam Gilewicz   +4 more
wiley   +1 more source

La Medicina Ocupacional en los últimos tiempos.

Revista Médica Herediana, 2005
El ámbito de la práctica de la medicina ocupacional ha sufrido cambios importantes en este último siglo, como consecuencia de las expectativas de empleadores y trabajadores, así como de la sociedad y el Gobierno.
Raúl Gomero Cuadra, Carlos Llap Yesán
doaj  

Mechanical Behavior and Microstructural Changes Associated with Tensile Deformation above the Martensite Start Temperature during Quenching and Subsequent Partitioning of a Low‐Alloy 37SiB6 Steel

Advanced Engineering Materials, EarlyView.
A new experimental setup, incorporating digital image correlation and infrared thermography in combination with inductive‐conductive heating for precise temperature control, is used to analyze the mechanical behavior and microstructural changes of sheet metal under complex thermomechanical test conditions that represent quench and partitioning ...
Christian Illgen, Benjamin Bohne, Sven Winter, Marcus Böhme, Martin F.-X. Wagner   +4 more
wiley   +1 more source

A four-helix bundle stores copper for methane oxidation [PDF]

, 2015
Methane-oxidising bacteria (methanotrophs) require large quantities of copper for the membrane-bound (particulate) methane monooxygenase (pMMO). Certain methanotrophs are also able to switch to using the iron-containing soluble MMO (sMMO) to catalyse ...
A Badarau, A Badarau, A Badarau, A El Ghazouani, A El Ghazouani, A Schäfer, A Vagin, AJ McCoy, Andrew T. Crombie, Arnaud Baslé, AS Hakemian, B Gold, C Notredame, CA Haynes, Christopher Dennison, CJ Barrow, CK Riener, DEK Sutherland, DL Poutney, EC Theil, F Xie, GA Brusseau, GM Sheldrick, GP Stafford, H Jiang, HJ Kim, J. Colin Murrell, JC Murrell, JD Bendtsen, JD Semrau, JM Argüello, K Cowtan, K Cowtan, Kevin J. Waldron, L Banci, LS Kau, LY Stein, MD Winn, Neil G. Paterson, Nicolas Vita, OA Kharenko, P Bagchi, PA Cobine, PR Evans, PR Evans, PW Riddles, R Balasubramanian, R Balasubramanian, R Simon, RA Festa, RS Hanson, S Allen, S Allen, S Tottey, Semeli Platsaki, SL Davies, Stephen J. Allen, T Palmer, U Hellman, V Calderone, VB Chen, W Kabsch, WM Reed, Z Ma, Z Xiao, Z Xiao   +65 more
core   +1 more source

Advancing Wildfire‐Retardant Materials: Engineering Strategies for Direct and Indirect Suppression

Advanced Engineering Materials, EarlyView.
Here, the evolution, ecological impact, and performance of current fire‐retardant materials and suppression strategies are reviewed, offering an engineering perspective to address existing challenges and propose pathways for the development of more effective, scalable, and sustainable solutions to meet the demands of a changing climate. Wildfires cause
Changxin Dong, Samya Sen, Athena Kolli, Stewart G. Wilson, Eric Andrew Appel   +4 more
wiley   +1 more source

High‐Temperature Oxidation of the CrFeNi Medium‐Entropy Alloy

Advanced Engineering Materials, EarlyView.
The oxidation behavior of equiatomic CrFeNi MEA is a key issue that determines this material's suitability for high‐temperature application. The understanding of long‐term behavior is even more crucial than short‐term corrosion effects. The alloy is exposed to synthetic air at 1000, 1050, and 1100 °C for 24, 100, and 1000 h and systematically compared ...
Anna Maria Manzoni, Wencke Mohring, Mike Schneider, Guillaume Laplanche, Sebastian Peter Hagen, Christiane Stephan‐Scherb   +5 more
wiley   +1 more source