Results 21 to 30 of about 2,361,401 (358)

Liquid and supercritical CO2 as an organic solvent in Hadean seafloor hydrothermal systems: implications for prebiotic chemical evolution

open access: yesProgress in Earth and Planetary Science, 2022
Prebiotic chemical evolution and the emergence of life in the seafloor hydrothermal systems of Hadean Earth is among the most plausible and popular hypotheses for the origin of earthly life.
Takazo Shibuya, Ken Takai
doaj   +1 more source

To cut or not to cut … [PDF]

open access: yesBritish Journal of General Practice, 2010
There are not many people who would admit that, in their field, there should be cuts. I don't think I am brave or clever enough to be the odd one out. So here it is: I am against cuts in health care (the term ‘health care’, in my view, does not include management and administration — in these areas I would cut generously). Why? Because money is already
openaire   +2 more sources

Thioester synthesis through geoelectrochemical CO2 fixation on Ni sulfides

open access: yesCommunications Chemistry, 2021
Thioesters are often suggested to be key intermediates in primordial metabolism, but prebiotic CO2 fixation routes to thioesters remain elusive. Here, the authors show nickel sulfide, partially reduced to Ni(0) with realistic geoelectric potentials ...
Norio Kitadai   +8 more
doaj   +1 more source

The influence of surface treatment of PVD coating on its quality and wear resistant [PDF]

open access: yes, 2019
The article deals with a determination of the influence of a cutting edge preparation on the quality and wear resistance of coated cutting tools. Cutting inserts made from a sintered carbide with a deposited layer of PVD coating were selected for ...
Malotová, Šárka   +3 more
core   +1 more source

Sequential cocatalyst decoration on BaTaO2N towards highly-active Z-scheme water splitting

open access: yesNature Communications, 2021
Activation of narrow-bandgap photocatalysts holds key to applicable solar-to-hydrogen energy conversion. Here, the authors demonstrate effective sequential cocatalyst decoration for such narrow-bandgap photocatalysts to realise highly-efficient hydrogen ...
Zheng Wang   +14 more
doaj   +1 more source

An Innovative Experimental Study of Corner Radius Effect on Cutting Forces [PDF]

open access: yes, 2014
The cutting forces are often modelled using edge discretisation methodology. In finish turning, due to the smaller corner radii, the use of a local cutting force model identified from orthogonal cutting tests poses a significant challenge. In this paper,
BISSEY BRETON, Stéphanie   +3 more
core   +5 more sources

Evaluation of a self-equilibrium cutting strategy for the contour method of residual stress measurement [PDF]

open access: yes, 2018
An assessment of cutting-induced plasticity (CIP) is performed, by finite element (FE) prediction of the plastic strain accumulation along the cut tip when the EDM wire sections the NeT TG4 weld benchmark specimen along two cutting directions.
Hamelin, C. J.   +3 more
core   +1 more source

Electrochemical Properties of Metallic Coatings

open access: yesMetals, 2022
The metallic coating is an outstanding corrosion-protection option with extensive applications, especially in high-temperature environments. Considering the close relationship between anti-corrosion ability and constitutions, it is necessary to acquire ...
Fengting Cao   +4 more
doaj   +1 more source

An investigation on the mechanics of nanometric cutting and the development of its test-bed [PDF]

open access: yes, 2003
The mechanics of machining at a very small depth of cut (100 nm or less) is not well understood. The chip formation physics, cutting forces generation, resulting temperatures and the size effects significantly affect the efficiency of the process and ...
Cheng, K, Guo, XJ, Holt, R, Luo, X
core   +1 more source

Drug Discovery through Nuclear Magnetic Resonance Spectroscopy: From Binding Epitopes and Ligand Screening to Conformational Analysis

open access: yesCHIMIA, 2006
Nuclear magnetic resonance (NMR) methods at the Institute of Molecular Pharmacy (IMP) provide crucial information in several fundamental themes in drug discovery.
Brian Cutting
doaj   +1 more source

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