Results 71 to 80 of about 596,435 (207)
An Efficient Method for the Preparation of Sulfonamides from Sodium Sulfinates and Amines
ChemistryOpen, 2022 Sulfonamides have a special role on medicine due to their broad biological activities, as bacterial infections, diabetes mellitus, oedema, hypertension prevention and treatment.
Haiying Tian +3 more
doaj +1 more source
$\pi$-Electron Ferromagnetism in Metal Free Carbon Probed by Soft X-Ray Dichroism
, 2007 Elemental carbon represents a fundamental building block of matter and the possibility of ferromagnetic order in carbon attracted widespread attention.
D. Spemann +8 more
core +1 more source
Evolution of zero-metallicity massive stars [PDF]
, 2002 We discuss the evolutionary properties of primordial massive and very massive stars, supposed to have formed from metal-free gas. Stellar models are presented over a large range of initial masses (8 Msun
Chiosi, C. +3 more
core +2 more sources
, 2012 Over the course of several decades, organic liquid scintillators have formed the basis for successful neutrino detectors. Gadolinium-loaded liquid scintillators provide efficient background suppression for electron antineutrino detection at nuclear ...
\scshape Double Chooz collaboration +19 more
core +1 more source
MoleculesMetal-free materials have been proved to be promising replacements of traditional metal-based catalysts for advanced oxidation reactions. Carbon nitride was found to be able to activate H2O2 and generate hydroxyl radicals (•OH).
Zixu Yang +5 more
doaj +1 more source
Metal-free aerobic oxidations mediated by N-hydroxyphthalimide. A concise review
Beilstein Journal of Organic Chemistry, 2013 Since the beginning of the century, N-hydroxyphthalimide and related compounds have been revealed to be efficient organocatalysts for free-radical processes and have found ample application in promoting the aerobic oxidation of a wide range of organic ...
Lucio Melone, Carlo Punta
doaj +1 more source
Clarifying the Origin of Oxygen Reduction Activity in Heteroatom-Modified Defective Carbon
Cell Reports Physical Science, 2020 Summary: Metal-free oxygen reduction reaction (ORR) catalysts have been intensively studied during the past decade. For heteroatom-modified carbon materials, the influence of heteroatoms on the ORR remains unclear.
Xuecheng Yan +8 more
doaj +1 more source
Evolution of low-mass metal-free stars including effects of diffusion and external pollution
, 1999 We investigate the evolution of low-mass metal-free Population III stars. Emphasis is laid upon the question of internal and external sources for CNO-elements, which - if present in sufficient amounts in the hydrogen-burning regions - lead to a strong ...
A. Weiss +15 more
core +2 more sources
Chemistry and cooling in metal-free and metal-poor gas
, 2007 I summarize four of the most important areas of uncertainty in the study of the chemistry and cooling of gas with zero or very low metallicity. These are: i) the importance and effects of HD cooling in primordial gas; ii) the importance of metal-line and
Glover, S. C. O.
core +1 more source
The Development of Metal-Free Porous Organic Polymers for Sustainable Carbon Dioxide Photoreduction
NanomaterialsA viable tactic to effectively address the climate crisis is the production of renewable fuels via photocatalytic reactions using solar energy and available resources like carbon dioxide (CO2) and water.
Ranjit Bariki +3 more
doaj +1 more source