Charge-exchange reactions between a fully ionized stellar wind and the partially ionized warm gas in the interstellar medium create a compressed region of hot neutral hydrogen atoms that are decelerated relative to the inflowing interstellar gas. This "hydrogen wall" produces a blue-shifted absorption...
The expulsion of C 2 H 3 O藱 from the molecular ion was particularly favoured for the 3-methyl substituted compounds. In this elimination, ring carbons 5 and 6 were lost simultaneously with a hydrogen atom transfer to the nitrogen atom....
A hydrogen fuel cell, producing hydrogen on demand using aqueous solutions containing de-ionized water and a buffer. This fuel cell technology works using either a plate and or coil cell technology, with or without modern day electronics... KO Hedman - US 被引量: 16发表: 2010年 加载更多0关...
Synthesis of 2D metal oxides and hydroxides Salts are common ionic crystals that can ionize in the molten state. In our experiments, we typically started by heating the nitrate to the molten state in a muffle furnace and adding the precursor into it (Fig. 1a–c). Here, the ionized species...
We analyse IRAS and COBE DIRBE data at wavelengths between 2.2 and 240 mu m of the central 500 pc of the Galaxy and derive the large-scale distribution of ... R Launhardt,R Zylka,PG Mezger - 《Astronomy & Astrophysics》 被引量: 250发表: 2002年 The Ionized Gas and Nuclear Environment ...
(2) molecules that were not ionized or containing ionized adducts; (3) molecules that contained amine, hydroxyl or carboxyl groups. The 178,692 molecules then underwent virtual dansylation reactions, where compounds containing amine or hydroxyl groups were derived using DnsCl and those containing ...
Extended Red Emission and the evolution of carbonaceous nanograins in NGC 7023 Context: Extended Red Emission (ERE) was recently attributed to the photo-luminescence of either doubly ionized Polycyclic Aromatic Hydrocarbons (PAH++), o... O Berne,C Joblin,M Rapacioli,... - 《Astronomy & Astroph...
In contrast to the usual replacement of a hydrogen by the second metal atom to form (M+2Met-H)+, there is no loss of hydrogen in the doubly cationized species. Since two positively charged metal ions are added to the neutral sample molecule, a one-electron reduction step must also be ...
Lithium has confused scientists for decades at almost every scale of the universe. Lithium-rich giants are peculiar stars with lithium abundances greater than model prediction. A large fraction of lithium-rich low-mass evolved stars are traditionally sup
Electrospray ionization (ESI) mass spectrometry (MS) is a powerful analytical tool for elucidating structural details of proteins in solution especially when coupled with amide hydrogen/deuterium (H/D) exchange analysis. ESI charge-state distributions and the envelopes of charges they form from ...