The present invention relates to pyrimidine compounds that are useful as anti-proliferative agents. More particularly, the present invention relates to oxygen linked and substituted pyrimidine compounds, methods for their preparation, pharmaceutical compositions containing these compounds and uses of these ...
athe two pairs of electrons of oxygen may be shared with one carbon alone forming a double bond, or with two separate carbons,or with one carbon and one hydrogen forming only single bonds 正在翻译,请等待... [translate]
et al. In situ Raman spectroscopic evidence for oxygen reduction reaction intermediates at platinum single-crystal surfaces. Nat. Energy 4, 60–67 (2019). Article CAS Google Scholar Strasser, P. et al. Lattice-strain control of the activity in dealloyed core–shell fuel cell catalysts. Nat....
give products with high bond temperatures. This is best realized when the fuel consists of carbon and nitrogen in the ratio of 1:1. It is clear fromTable 4that the reactions of C2H2and C4N2to give CO and N2fulfil these general requirements and so yield some of the highest known ...
Singlet oxygen microscope: from phase-separated polymers to single biological cells. The lowest excited electronic state of molecular oxygen, singlet molecular oxygen (a1Deltag), is an intermediate in many chemical and biological processes... JW Snyder,I Zebger,G Zhan,... - 《Cheminform》 被引...
Once organisms developed the capability forphotosynthesis, oxygen was produced in large quantities. The buildup of oxygen in the atmosphere also permitted the development of theozone layeras O2molecules were dissociated into monatomic oxygen (O; consisting of single oxygen atoms) and recombined with ot...
The heavier isotopes, deuterium (2H or 2D) and tritium (3H or 3T), contain one neutron and two neutrons, respectively, in addition to the single proton. These schematic pictures of nuclei are actually not realistic. The isotopes of a given element are distinguished by using a superscript to...
Accordingly, the bond valence sums (when using soft BV parameters)35,36,37 of all atoms in the refined structure are close to the expectation value leading to a low global instability index of GII=0.077 underlying the plausibility of the structure model. Geometry optimization of the result from...
Carbon-oxygen bond formation by fungal laccases: cross-coupling of 2,5-dihydroxy-N-(2-hydroxyethyl)-benzamide with the solvents water, methanol, and other ... Laccase-catalyzed reactions lead to oxidation of the substrate via a cation radical, which has been described to undergo proton addition...
Fig. 1. Schematic representation of oxygen vacancy in [0 0 1] TiO2 crystal plane (a) oxygen vacancy creation (b) oxygen vacancy with double positive charge (VO) (c) oxygen vacancy with single positive charge (VO) (d) oxygen vacancy with neutral charge state (VO). (1)Oo⇔12O2(gas)...