Results 191 to 200 of about 2,839 (212)

Transition metal catalysts for asymmetric reduction

1996
A great number of optically active compounds contain a hydrogen atom at the stereogenic centre. As this hydrogen atom can be introduced into appropriate unsaturated precursors by hydrogenation reactions, asymmetric hydrogenation is of particular importance to access highly enantiomerically pure compounds.
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On minimum flow and transitive reduction

1988
In general, a flow problem G=(V,E,b,c) is given by a directed graph G=(V, E) and the two functions b and c on the set of edges, where b(e) means a lower and c(e) an upper bound. The aim is: Find a maximum (minimum) flow function f subject to the condition that $$0 \leqslant b(e) \leqslant f(e) \leqslant c(e) \leqslant \infty \forall e \in E ...
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Transition-metal-free photochemical reductive denitration of nitroarenes

Chemical Communications
A mild, transition-metal-free photochemical process for reductive denitration of nitroarenes with broad functional group compatibility has been developed.
Shuai Tang, Weidong Xu, Hua Zhang
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Transition Algorithm for Network Traffic Signal Transition Period Reduction

International Journal of Highway Engineering, 2023
Yongbin Cho, Jin-Tae Kim
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Transition Metal Chalcogenides for Oxygen Reduction

2013
Transition metal chalcogenide materials represent nowadays a new family of alternative materials for the cathode oxygen reduction reaction (ORR). During the last decade, the efforts have been concentrated in developing this kind of materials due to their capacity to remain selective and tolerant in the presence of small organics in acid as well as in ...
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Probing BBP Transition by Dimensional Reduction

Journal of Experimental and Theoretical Physics, 2022
A. F. Valov, A. S. Gorsky, S. K. Nechaev
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Dendrimer-transition metal catalyzed oxidation and reduction reactions

2009
This project was launched with the aim of developing dendrimer catalysts for oxidation and reduction reactions. Poly(amidoamine) (PAMAM) and poly(propyleneimine) (PPI) dendrimers were of interest because of their well-established synthesis. Chapter 1 describes the fundamentals of dendrimers and provides a brief insight of their application in catalysis.
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Reduction for flag‐transitive point‐primitive 2‐(v, k, λ) designs with λ prime

, 2023
Yongli Zhang, Jianfu Chen
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Reduction of flag-transitive automorphism groups of 2-(v,k,λ) designs with (r − λ,k)=1

, 2021
Wanbao Zhang, Shenglin Zhou
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Attribute reductions of quantitative dominance-based neighborhood rough sets with A-stochastic transitivity of fuzzy preference relations

, 2023
Shuyun Yang, Hongying Zhang, Guang Shi, Yingjian Zhang   +3 more
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