Results 41 to 50 of about 50,291 (237)
Journal of Materials Research and TechnologyCombining high hardness carbide of high vanadium cast iron with nano pearlite, which has high strength and toughness, represents an innovative attempt to explore a new technology for preparing high vanadium alloy.
Hongshen Xie +7 more
doaj +1 more source
Abrasion Resistance of Thermoplastic Polyurethane in Abrasion Resistance Test Using Abrasives.
KOBUNSHI RONBUNSHU, 1992 ポリカプロラクトン, 4, 4'-ジフェニルメタンジイソシアナート, 1, 4-ブタンジオールからなる熱可塑性ポリウレタンのうち組成比の異なる2種類の試料について, 研磨材を用いた摩耗試験を行った. その結果, 硬さが小さく, 動的貯蔵弾性率 (E') の小さい試料が耐摩耗性が良好であった. また, 温度を上げた状態での摩耗試験の結果, 及び加圧下でのポリウレタンと鋼球の接触状態の観察から, E'の低い試料では, 研磨材との接触面積が大きくなり, 研磨材と一体となった層を形成するため, 耐摩耗性が向上するものと考えられた.
UEMURA, Isamu, IKEDA, Kiyoshi
openaire +2 more sources
Reconstructing enzyme evolution by protein engineering
FEBS Letters, EarlyView.Natural enzyme evolution can be retraced by protein engineering methods such as directed evolution, rational design, and ancestral sequence reconstruction. These approaches reveal how enzymes emerged from ligand‐binding scaffolds, developed varying substrate preferences, formed oligomeric complexes, adapted to environmental changes, and evolved novel ...
Lukas Drexler +2 more
wiley +1 more source
Abrasiveness and whitening effect of charcoal-containing whitening toothpastes in permanent teeth.
Dental Research Journal, 2021 Background: Charcoal toothpastes can whiten teeth through abrasion. The purpose of this study was to determine the level of whitening and abrasiveness of charcoal toothpastes in permanent teeth. Materials and Methods: In this in vitro study, 30 premolars
Masoud Fallahinejad Ghajari +3 more
doaj +1 more source
Abrasion-corrosion of cast CoCrMo in simulated hip joint environments
, 2009 Metal-on-metal (MoM) hip joint replacements have been increasingly used for younger and more active patients in recent years due to their improved wear performance compared to conventional metal-on-polymer bearings.
Sun, Dan
core +2 more sources
The microbiome in human skin aging
FEBS Letters, EarlyView.Age‐related skin changes encompass the well‐known visible phenotypic alterations, together with microbiome dysbiosis and a series of molecular aging hallmarks. These hallmarks characterize not only a fully stablished aged phenotype but also the skin aging process itself.
Manuel Huerta Arana +3 more
wiley +1 more source
Frontiers in Materials, 2019 The effects of carbon contents on microstructure evolution and mechanical properties, including hardness, impact toughness and abrasive impact wear resistance behavior, were investigated for Cr-Si-Mn low alloy cast steels.
Xiaodong Wang +5 more
doaj +1 more source
FEBS Letters, EarlyView.How do genomes gain new functional parts? In eukaryotes, which tend to evolve under weak selection, much of the genome is junk. Palazzo and Qiu borrow the logic of Markov chains to show how non‐functional DNA becomes functional through the appearance of intermediate states, which arise due to epistasis, buffering, and biochemical messiness, allowing ...
Alexander F. Palazzo, Yi Qiu
wiley +1 more source
Revista Brasileira de Engenharia Agrícola e Ambiental, 2009 A correta avaliação e previsão do tempo de vida útil dos mecanismos que atuam no rompimento do solo, são importantes na análise de equipamentos. O desgaste deste tipo de ferramenta (ponteiras sulcadoras de semeadoras, de escarificadores e de subsoladores)
Antônio L. T. Machado +5 more
doaj +1 more source
Effect of Vibration on the Porosity and Strength of Instant Drink Granules
Техника и технология пищевых производств, 2022 Instant food products are extremely popular, and food industry knows numerous ways and methods of their production. To remain competitive, an instant drink production process should be efficient and flawless.
Anatoliy M. Popov +5 more
doaj +1 more source