Results 81 to 90 of about 62,990 (304)
Global Sulfur Emissions in the 1990s [PDF]
This paper provides global and individual country estimates of sulfur emissions from 1991-2000. Raw estimates are obtained in two ways. For countries and years with published data I compile that data from the available sources.
David I. Stern
core +3 more sources
Advanced NanoBiomed Research, EarlyView.Bowl‐shaped Janus nanomotors with platinum, iron oxide, and polypyrrole integrate catalytic, magnetic, and electric propulsion for targeted drug delivery. They demonstrate controlled, directional motion under varying pH and hydrogen peroxide conditions, with optimal performance in neutral media.
Kimia Tavakoli Dehaghi +3 more
wiley +1 more source
Nucleophilic Ring Opening of N-Protected Leakadine in Liquid Sulfur Dioxide [PDF]
Here we present a new synthetic process of Leakadine 1 opening with metal halides and other nucleophiles in liquid sulfur dioxide as a ...
Lugiņina, Jevgeņija, Turks, Māris
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Bunsen section thermodynamic model for hydrogen production by the sulfur-Iodine cycle [PDF]
, 2009 A model for the Bunsen section of the Sulfur – Iodine thermo-chemical cycle is proposed, where sulfur dioxide reacts with excess water and iodine to produce two demixing liquid aqueous phases (H2SO4 rich and HI rich) in equilibrium.
Hadj-Kali, Mohamed +7 more
core +1 more source
Angewandte Chemie, EarlyView.A critical step, dry reforming of methane (DRM) converts biogas into useful syngas. Yet trace H2S in biogas rapidly poisons DRM catalysts, limiting practical use. We developed a robust Pt/CeO2 catalyst sustaining DRM activity via CO2‐induced reverse lattice oxygen spillover in H2S‐rich environments.
Jun Liu +11 more
wiley +1 more source
Sulfur Dioxide - Powerful Solvent for Nucleophilic Ring Opening Reactions of Small N-Heterocycles [PDF]
Here we present a new synthetic process of aziridine and azetidine nucleophilic ring opening reactions with metal halides and other nucleophiles in liquid sulfur ...
Lugiņina, Jevgeņija
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Ring-Opening of Carbamate-Protected Aziridines and Azetidines in Liquid Sulfur Dioxide [PDF]
The reactions of halides or pseudohalides of group I and II metals with carbamate-protected aziridines and azet- idines in liquid sulfur dioxide as solvent resulted in the efficient ring-opening of these heterocycles. Sulfur dioxide, as a highly polar
Lugiņina, Jevgeņija +3 more
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Reactions of Aziridines with Metal Halides in Liquid Sulfur Dioxide [PDF]
In the past decades aziridines have played a role of versatile intermidiates and important precursors for the synthesis of nitrogen-containing active compounds.
Lugiņina, Jevgeņija, Turks, Māris
core
Sulfites in beer: reviewing regulation, analysis and role
Scientia Agricola, 2016 Beer is an extremely complex mixture of more than 3,000 different compounds in an aqueous environment. Thus, it is perhaps not surprising that the maintenance of beer quality throughout its lifetime has been a considerable challenge for brewers.
Luis F. Guido
doaj +1 more source
Angewandte Chemie International Edition, EarlyView.An on‐resin dual‐modification strategy for peptides is presented, comprising S‐alkynylation of peptide thiosulfonates and regioselective iridium‐catalyzed azide–thioalkyne cycloaddition. This method reliably provides access to peptides with intricate non‐canonical modifications, being compatible with complex peptides, alkynes and azides.
Marius Werner +5 more
wiley +1 more source