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81.
The structure of the title compound, [Me2Sn(O2CC6H4NH2-o)(O2CC6H4(N=C(H)C6H4NMe2-p)-o)(–O2CC6H4NH3-o)], has been determined at room temperature. The structure features a distorted trigonal bipyramidal coordination geometry for Sn, defined by three O atoms derived from chemically different, monodentate carboxylate ligands and two methyl groups. Crystals are monoclinic, space groupP21/n witha=14.718(5),b=10.981(4),c=20.321(3) Å, =110.74(2)°,Z=4; refinement on 2480 reflections gaveR=0.046. 相似文献
82.
Conformational analysis of peptides containing a glucose-derived furanoid sugar amino acid (Gaa) by detailed NMR and constrained MD studies revealed that peptides with repeating Gaa-Leu-Val units had conformational signatures very similar to those of linear homooligomers of Gaa. 相似文献
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Tushar Kanti Sen Dipankar Das Kartic C. Khilar G.K. Suraishkumar 《Colloids and surfaces. A, Physicochemical and engineering aspects》2005,260(1-3):53-62
Transport of bacteria is an important aspect from scientific, industrial and environmental point of view. In this work, a one-dimensional mathematical model based on linear equilibrium adsorption of bacteria has been developed to predict bacterial transport through porous media. This model is more realistic than existing models because of its coupling both physicochemical and biological phenomena. Two important biological phenomena, the growth and decay of bacterial cells and chemotactic/chemotaxis of bacteria along with physicochemical properties have been adequately incorporated which are quite new aspects in our model. In agreement with experimental study by [D.K. Powelson, R.J. Simpson, C.P. Gerba, J. Environ. Qual. 19 (1990) 396], model simulations indicated that enhancement of breakthrough occurs due to increase in flow velocity, cell concentration, substrate concentration, respectively. It has also been found that chemo tactic has a significant effect on bacterial transport, especially under conditions of considerable substrate gradient and at low pore velocity. The importance of threshold concentration of captured cells (σ0) on bacterial transport has also been identified which is also a new aspect in our model. 相似文献
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Summary Quinolinimide which is found to be a selective reagent for palladium forms a complex of the composition Pd(C7H3O2N2)2. The reagent quantitatively precipitates palladium from solutions of pH 0.5 to 2.5 in presence of common ions as well as platinium metals, except tin which, however, can be kept in solution by complexing with citric acid. The palladium complex being stable up to 307° C can be directly weighed.
Zusammenfassung Chinolinimid wird als selektives Reagens für Palladium vorgeschlagen. Bei pH-Werten zwischen 0,5 und 2,5 kann Palladium quantitativ in Form des Komplexes Pd(C7H3O2N2)2 gefällt werden, wobei die meisten anderen Ionen, auch die der Platinmetalle, in Lösung bleiben. Zinn stört, kann aber mit Citronensäure maskiert werden. Der Palladiumkomplex ist bis 307° C stabil und kann direkt ausgewogen werden.相似文献
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Weiwei Yang Dr. Kushal Samanta Xintong Wan Dr. Tushar Ulhas Thikekar Yang Chao Shunshun Li Ke Du Dr. Jun Xu Yan Gao Prof. Han Zuilhof Prof. Andrew C.-H. Sue 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2020,132(10):4023-4028
Tiara[5]arenes (T[5]s), a new class of five-fold symmetric oligophenolic macrocycles that are not accessible from the addition of formaldehyde to phenol, were synthesized for the first time. These pillar[5]arene-derived structures display both unique conformational freedom, differing from that of pillararenes, with a rich blend of solid-state conformations and excellent host–guest interactions in solution. Finally we show how this novel macrocyclic scaffold can be functionalized in a variety of ways and used as functional crystalline materials to distinguish uniquely between benzene and cyclohexane. 相似文献
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