Results 121 to 130 of about 4,568,406 (389)

Evolution of the First Supernovae in Protogalaxies: Dynamics of Mixing of Heavy Elements

, 2012
The paper considers the evolution of the supernova envelopes produced by Population III stars with masses of $M_*\sim 25-200 M_\odot$ located in non-rotating protogalaxies with masses of $M\sim 10^7 M_\odot$ at redshifts $z=12$, with dark-matter density ...
Matvienko, E. E., Razoumov, A. O., Shchekinov, Yu. A., Vasiliev, E. O., Vorobyov, E. I.   +4 more
core   +1 more source

A Simulative Approach for the Prediction of Mesoscale Residual Stress Fields in Solution‐Strengthened Ferritic Ductile Iron

Advanced Engineering Materials, EarlyView.
This study presents a 3D representative volume element‐based simulation approach to predict mesoscopic residual stress and strain fields in silicon solid solution‐strengthened ductile cast iron. By modeling phase transformation kinetics with an enhanced Johnson–Mehl–Avrami–Kolmogorov model, the effects of varying cooling rates on residual stresses are ...
Lutz Horbach, Oliver Schenk, Valérian Iss, Ali Rajaei, Jiali Zhang, Felix Weber, Christoph Broeckmann   +6 more
wiley   +1 more source

Heavy Metal Stress Assay of Caenorhabditis elegans

Bio-Protocol, 2017
Organisms have developed many protective systems to reduce the toxicity from heavy metals. The nematode Caenorhabditis elegans has been widely used to determine the protective mechanisms against heavy metals.
Strahil Pastuhov, Tatsuhiro Shimizu, Naoki Hisamoto   +2 more
doaj   +1 more source

Performance Comparison of Surface Sensitizers for Diode Laser Powder Bed Fusion of Polyamide 12

Advanced Engineering Materials, EarlyView.
Laser‐generated nanoparticles transform standard PA12 powders into high‐performance, dye‐free feedstocks for diode laser 3D printing. Despite identical absorbance at 808 nm, CuS, LaB6, and CB coatings reveal striking differences in fusion and strength—unlocking new design space for recyclable, industrial‐grade polymers.
Michael Willeke, Alexander Sommereyns, Simon Leupold, Arne Lüddecke, Arno Kwade, Nick Hantke, Jan T. Sehrt, Michael Schmidt, Anna R. Ziefuss, Stephan Barcikowski   +9 more
wiley   +1 more source

Determination of forms of heavy metals in bottom ash from households using sequential extraction

E3S Web of Conferences, 2018
The paper presents the results of heavy metals mobility obtained by sequential extraction method and leaching test. Heavy metals in solid waste material occur in different forms and phases that differ in terms of the toxicity, mobility and ...
Mizerna Kamila
doaj   +1 more source

Mitigation of Cracks in High‐Performance Nickel‐Based Superalloys in Powder Bed Fusion Laser Beam of Metals Using a Metal Matrix Composite Approach

Advanced Engineering Materials, EarlyView.
High‐performance nickel‐based superalloys are often not processible in additive manufacturing (AM) due to hot cracking. The findings in this manuscript propose an efficient method to mitigate cracking and enhance mechanical properties of these alloys by producing a metal matrix composite, contributing to the material and process perspective of the AM ...
Klaus Büßenschütt, Maël Pontoreau, Christian Haase, Johannes‐Henrich Schleifenbaum   +3 more
wiley   +1 more source

A Mathematical Statistical Approach to Assess and Research Heavy Metals in Natori River, Sendai Plain

Journal of MMIJ, 2016
It is important to understand the distribution mechanism of heavy metal elements in environmental systems, because the toxicities of various metals and metalloids significantly affect health risks. The heavy metals concentrations are controlled by a wide
Kengo NAKAMURA, Kairi Sato, Yoshishige KAWABE, Tatsu KUWATANI, Takeshi KOMAI   +4 more
doaj   +1 more source

Toxicity and Bioremediation of Heavy Metals Contaminated Ecosystem from Tannery Wastewater: A Review

Journal of Toxicology, 2018
The discharge of untreated tannery wastewater containing biotoxic substances of heavy metals in the ecosystem is one of the most important environmental and health challenges in our society.
B. Igiri, S. Okoduwa, Grace O Idoko, E. P. Akabuogu, Abraham O. Adeyi, I. K. Ejiogu   +5 more
semanticscholar   +1 more source

Black Hole Thermodynamics and Heavy Fermion Metals

, 2010
Heavy fermion alloys at critical doping typically exhibit non-Fermi-liquid behavior at low temperatures, including a logarithmic or power law rise in the ratio of specific heat to temperature as the temperature is lowered. Anomalous specific heat of this
CP Herzog, D-W Pang, E Witten, E. J. Brynjolfsson, EJ Brynjolfsson, G Bertoldi, G Bertoldi, GR Stewart, GR Stewart, GT Horowitz, Hv Lohneysen, Hv Löhneysen, Hv Löhneysen, JM Maldacena, L. Thorlaciusa, M Cubrovic, P Coleman, P Koroteev, Q Si, S Kachru, S-J Rey, SA Hartnoll, SA Hartnoll, SA Hartnoll, SF Ross, SS Gubser, T. Zingg, U. H. Danielsson, UH Danielsson   +28 more
core   +1 more source

Heavy-electron metals

Nature, 1986
A new class of metals has been found in which the electrons have effective masses orders of magnitude larger than the free-electron mass. Some of these metals are superconducting at low temperatures. This superconductivity seems to be unconventional, with an underlying mechanism different from that in all other known superconductors.
Fisk, Z, Ott, HR, Rice, TM, Smith, JL
openaire   +4 more sources