Results 91 to 100 of about 589,191 (240)
The effects of oxygen on the evolution of microbial membranes [PDF]
One prokaryote, Methylococcus capsulatus, synthesizes both hopanoids and sterols and, thus, provides a unique opportunity to study the evolution of membrane function. When M.
Jahnke, L. L.
core +1 more source
Thermodynamic Aspects of Flagellar Activity [PDF]
, 1967 1. The frequencies of the beat of cilia and flagella from various organisms have been determined at temperatures in the range 5-35°C. 2. Values of the activation enthalpy (ΔH{ddagger}, kcal./mole) and activation entropy (ΔS{ddagger}, e.u.) derived ...
Holwill, M. E., Sleigh, M. A.
core
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 +5 more
wiley +1 more source
Regimes de verdade em tensão no campo das ciências da educação (Suíça romanda, décadas de 1910-1920)
Cadernos de História da EducaçãoDurante o primeiro terço do século XX, no campo das ciências da educação em fase de elaboração, os reformadores – teóricos e/ou profissionais – ambicionavam fundar uma pedagogia científica que fornecesse aos professores métodos confiáveis que lhes ...
Frédéric Mole
doaj +1 more source
Journal of Family and Community Medicine, 2011 Hydatidiform mole (HM) is the most common form of gestational trophoblastic neoplasia. Recurrence of HM is extremely rare. Here, we report the case of a patient with six consecutive partial HMs without normal pregnancy.
Ahlam A Al-Ghamdi
doaj +1 more source
Advanced Engineering Materials, EarlyView.This article investigates residual stress formation during single‐spot nanosecond laser ablation of stainless steel. Experimental validation and a parametric study using finite element simulations are employed to analyze thermal effects, ablation dynamics, and stress evolution.
Yutaka Tsumura +7 more
wiley +1 more source
Advanced Engineering Materials, EarlyView.This study designs Ta–Mo–Cr–Ti–Al refractory high‐entropy alloys with a disordered body‐centered‐cubic A2 crystal structure aiming for improved ductility, lower density, and oxidation resistance. Four alloy compositions are identified by thermodynamic calculations.
Kateryna Khanchych +7 more
wiley +1 more source
Advanced Engineering Materials, EarlyView.Ca2.5Ag0.3Sm0.2Co4O9 semiconductor materials are synthesized and produced in this study using the sol–gel and cold pressing techniques for thermoelectric generator applications. As template samples are added, the Seebeck coefficient and power factor values rise, peaking at 800 °C for Ca2.5Ag0.3Sm0.2Co4O9 at 274.47 μV K−1 and 0.58 mW mK−2, respectively.
Enes Kilinc +4 more
wiley +1 more source
RECONSTRUCTING THE EVOLUTIONARY HISTORY OF HANTAVIRUSES
Acta Biomedica Scientifica, 2012 Segregation of hantaviruses into clades that parallel the molecular phylogeny of rodents (order Rodentia) in the Murinae, Arvicolinae, Neotominae and Sigmodontinae subfamilies suggests that hantaviruses may have co-evolved with their reservoir hosts ...
R. Yanagihara
doaj
Search for solid conductors of Na(+) and K(+) ions: Five new conductors [PDF]
Five conductors of three structure types were discovered which, as solids, can transport Na(+) or K(+) ions with conductivities of approximately .00001/(omega cm) at 300 K.
Fielder, W. L. +3 more
core +1 more source