Bi Lewis acidic: Donor-free cationic bismuth compounds readily coordinate basic substrates including arenes, phosphanes, and isonitriles, degrade the weakly coordinating counter-anion [PF6]–. Counterintuitively, an increase in steric bulk around can acidity. In graphic, a kraken grabs substrates, solving scientific puzzles about bismuth-based More information be found Research Article by C. von...

We report the changes in the concentrations and (18)O contents of extracellular CO(2) and HCO(3) (-) in suspensions of Synechococcus sp. (UTEX 2380) using membrane inlet mass spectrometry. This marine cyanobacterium is known to have an active uptake mechanism for inorganic carbon. Measuring (18)O exchange between CO(2) and water, we have found the intracellular carbonic anhydrase activity to be...

The binding of carbon monoxide, a competitive inhibitor of many hydrogenases, to the active site of Desulfovibrio fructosovorans hydrogenase has been studied Journal of Biological Inorganic Chemistry, 7 ( 3), 2002 2 by infrared spectroscopy in a spectroelectrochemical cell. Direct evidence has been obtained of what redox states of the enzyme can bind extrinsic CO. Redox states A, B and SU do no...

A graph G for which γR(G)=2γ(G) is the Roman graph, and if γRwc(G)=2γwc(G), then weakly connected graph. In this paper, we show that decision problem of whether a bipartite co-NP-hard problem. Next, prove similar results graphs. We also study trees improving result M.A. Henning’s characterization trees, Discuss. Math. Graph Theory 22 (2002). Moreover, give trees.

Let $mathfrak{F}$ be a formation and $G$ a finite group. A subgroup $H$ of $G$ is said to be weakly $mathfrak{F}_{s}$-quasinormal in $G$ if $G$ has an $S$-quasinormal subgroup $T$ such that $HT$ is $S$-quasinormal in $G$ and $(Hcap T)H_{G}/H_{G}leq Z_{mathfrak{F}}(G/H_{G})$, where $Z_{mathfrak{F}}(G/H_{G})$ denotes the $mathfrak{F}$-hypercenter of $G/H_{G}$. In this paper, we study the structur...

the main goal of this paper is to introduce and study a new class of function via the notions of $e$-$theta$-open sets and $e$-$theta$-closure operator which are defined by özkoç and aslım cite{10} called weakly $er$-open functions and $e$-$theta$-open functions. moreover, we investigate not only some of their basic properties but also their relationships with other types of already existing to...

Pd−Au bimetallic catalysts have shown promising performance in numerous reactions that involve hydrogen. Fundamental studies of hydrogen interactions with Pd−Au surfaces could provide useful insights into the reaction mechanisms over Pd−Au catalysts, which may, in turn, guide future catalyst design. In this study, the interactions of hydrogen (i.e., adsorption, absorption, diffusion, and desorp...