Instead of a proton-coupled electron transfer pathway, our results show that a Langmuir-Hinshelwood mechanism describes the rate-limiting hydrogen addition step, where hydrogen atom adsorbed on Pd is transferred to the carbonyl C atom of the reactant. As such, the strength of hydrogen binding on...
Before proceeding with theoretical investigations of the hydrolysis mechanism, we performed mutagenesis experiments to verify the reactant conformation. The docked pose indicated that the aliphatic chain of sphingomyelin is hydrophobically stabilized by I19 and W51 while the phosphocholine methyl groups of...
Density-functional-theory calculations suggest that the site-selectivity derives from the lower oxidation state of the iridium metal centre in the heterogeneous catalyst and its impact on the absorption energies of the reactants. These results showcase an example of a heterogeneous single-atom ...
The degree of guidance versus structure should remain adaptive to participant needs. Participants who are clearly distressed or avoidant may benefit from more process guidance, combined with emotion coaching, soothing and compassion. Whereas participants who are fragile or express reactant tendencies, ...
The small- and the medium-scale turbulence influence the mixing of the reacting mixture in the small unstable flame kernel with the reactants that surrounds it, causing variation in the reaction rate and hence variations in the delay period. The larger scale turbulence influences the variation of...
Anthocyanins are ubiquitous plant pigments used in a variety of technological applications. Yet, after over a century of research, the penultimate biosynthetic step to anthocyanidins attributed to the action of leucoanthocyanidin dioxygenase has never be
However, the success of this reaction is in part hampered by an extremely marked regioselectivity on the double bond, which dictates that electron-poor alkenes react exclusively on the β-carbon. Here, we show that ligand-free, few-atom palladium clusters in solution catalyse the α-selective ...
Reaction of coordination compounds: Complex ion undergoes ligand exchange (or substitution) reactions in solution. The rate of reaction is depends on the nature of metal ions and the ligands. Formation constant: K f = [product] eq [reactant] eq the ...
Depending on the nature of the redox species, redox-flow systems can have a high degree of sustainability as they operate (1) in a water electrolyte, with low cost and abundant salts, and (2) in closed loops to ensure maximal use of the reactants....
What can speed up a reaction without changing the nature of the reactants? A. Add water B. Add an inert gas C. Add a solvent D. Add a catalyst 相关知识点: 试题来源: 解析 D。加水、加惰性气体、加溶剂一般不会加快反应速率,且可能会稀释反应物。添加催化剂可以加快反应速率且不改变反应物的...