Results 31 to 40 of about 15,484 (216)
Angewandte Chemie, EarlyView.This study explores the origins of life by linking prebiotic chemistry, the emergence of information‐carrying molecules such as RNA and proteins, and philosophical questions about consciousness. The study emphasizes the role of molecular evolution in the Central Dogma and provides insights into the chemical origins of biology and the basis of life's ...
Harald Schwalbe +5 more
wiley +2 more sources
Angewandte Chemie, EarlyView.A NiH‐catalyzed α‐alkenylation via Markovnikov hydronickellation of alkynes enables convenient access to α‐chrial β‐methylene carbonyl frameworks that are prevalent in biorelevant molecules. High regio‐ and enantioselectivities have been achieved with excellent functional group tolerance and applicability toward complex structures. The β‐methylene unit
Hyeontaek Nam +3 more
wiley +2 more sources
An adaptive, fully implicit multigrid phase-field model for the quantitative simulation of non-isothermal binary alloy solidification [PDF]
, 2008 Using state-of-the-art numerical techniques, such as mesh adaptivity, implicit time-stepping and a non-linear multi-grid solver, the phase-field equations for the non-isothermal solidification of a dilute binary alloy have been solved.
Jimack, P.K., Mullis, A.M., Rosam, J.
core +1 more source
Materials Research Express, 2022 Evolution of microstructure and the globularization mechanism of α lamellar for TC21 titanium alloy during multi-directional forging (MDF) were analyzed with the help of OM, SEM, EDS and TEM techniques, FE simulation was also used to observe the above ...
Cheng Tao +5 more
doaj +1 more source
Advanced numerical method for generation of three-dimensional particles and its application in microstructure-based simulation of fatigue behavior [PDF]
, 2011 International audienceThe topology of representative elementary volumes (REV) generated to model materials microstructure is getting more and more complex.
Bernacki, Marc +5 more
core +4 more sources
Journal of Magnesium and AlloysThe blocky LPSO particles were modulated by single-directional and multi-directional forging, and the effect of blocky LPSO particles on the anisotropy of mechanical properties of Mg-8.5Gd-2.5Y-1.5Zn-0.5Zr alloy forged parts was investigated.
Jiyu Li +8 more
doaj +1 more source
Journal of Magnesium and Alloys, 2022 Multi-direction impact forging (MDIF) was applied to the as-extruded ZK60 Mg alloy, and the microstructure, texture evolution and yield strength symmetry were investigated in the current study.
Chao Cui +5 more
doaj +1 more source
Materials & Design, 2023 Centimeter-grade coarse grains commonly exist in heavy ingots of Ti2AlNb-based alloy and severely deteriorate their workability. To investigate the refinement of coarse grains, multi-directional isothermal forging (MDIF) was carried out on samples cut ...
Zhongyuan Yang +4 more
doaj +1 more source
Wilbur Norman Christiansen 1913-2007
, 2011 W. N. ('Chris') Christiansen was an innovative and influential radio astronomy pioneer. The hallmarks of his long and distinguished career in science and engineering, spanning almost five decades, were his inventiveness and his commitment to, and success
Frater, R. H., Goss, W. M.
core +1 more source
How Do Communities Use a Participatory Public Health Approach to Build Resilience? The Los Angeles County Community Disaster Resilience Project. [PDF]
, 2017 Community resilience is a key concept in the National Health Security Strategy that emphasizes development of multi-sector partnerships and equity through community engagement.
Bromley, Elizabeth +7 more
core +2 more sources