In the nine-co-ordinated [BaQ2(tetraglyme)] the Ba atom is co-ordinated by all the five oxygen atoms of tetraglyme and by four oxygen atoms of two bidentate Q whereas the co-ordination number of barium in [BaQ2(phen)2] is eight due to four oxygen atoms of the two Q ligands and ...
Organosulfur compound - Sulfoxides, Sulfones, Polyvalent: Two major groups of organosulfur compounds that have no counterparts among organic oxygen compounds are the sulfoxides and sulfones. If the bonding in these compounds is represented with doubly bo
Barium, which is slightly harder thanlead, has a silvery white luster when freshly cut. It readily oxidizes when exposed toairand must be protected fromoxygenduring storage. In nature it is always found combined with other elements. The Swedish chemistCarl Wilhelm Scheelediscovered (1774) a new...
Matrine induction of reactive oxygen species activates p38 leading to caspase-dependent cell apoptosis in non-small cell lung cancer cells. In the present study, we investigated whether matrine, a natural compound isolated from Sophora flavescens Ait. and exerting an inhibitory effect on lung ... ...
Oxidation of carbon compounds by silica-derived oxygen within impact-induced vapor plumes 来自 国家科技图书文献中心 喜欢 0 阅读量: 20 作者:K Ishibashi,S Ohno,S Sugita,T Kadono,T Matsui 摘要: Impact-induced vapor plumes produce a variety of chemical species, which may play an important role ...
“breathe”; that is, it must have some permeability to water vapour and also to oxygen. Films can be developed with high permeability or with none at all. In some applications the film should be self-sealing. Films can be made of any thickness, and for some purposes extreme toughness is...
Binding of carbon monoxide and oxygen to sterically protected heme model compounds (basket-handle porphyrins) was investigated in liquid toluene at temperatures from 180 to 300 K by laser flash photolysis. Only a single exponential rebinding process from the solvent could be seen in the time range...
63) is a powerful reaction for the introduction of oxygen in hydrocarbons. Oxygen can be used for the oxidation of ethene over a silver catalyst, but for all other alkenes hydroperoxides and related reagents are the source of oxygen to avoid further oxidation. As catalysts one can use ...
Roasting either magnesium carbonate or magnesium hydroxide produces theoxygencompoundmagnesium oxide, commonly called magnesia, MgO. It is a whitesolidused in the manufacture of high-temperaturerefractorybricks, electrical and thermal insulators, cements,fertilizer,rubber, andplastics. It is also used medic...
It derives its name from the fact that in the 19th century most of the carbon compounds then known were considered to have originated in living organisms. When combined with variable amounts of hydrogen, oxygen, nitrogen, sulfur, phosphorus, or other elements, the structural possibilities of ...