نتایج جستجو برای: ionic salts

تعداد نتایج: 72320  

Journal: :Chemical communications 2009
Shinsuke Inagi Yuta Doi Yuichiro Kishi Toshio Fuchigami

We successfully carried out Prins-type polymerization for the first time to prepare 4-fluorinated tetrahydropyran-containing polymers in a highly stereoselective manner.

Journal: :Surfaces 2023

In recent years, biochar has emerged as a remarkable biosourced material for addressing global environmental, agricultural, biomedical, and energy challenges. However, the performances of rest in part on finely tuning its surface chemical properties, intended to obtain specific functionalities. this review, we tackle treatment with silane other coupling agents such diazonium salts, titanates, i...

Journal: :Chemistry 2008
Elena Lestini Kirill Nikitin Helge Müller-Bunz Donald Fitzmaurice

This paper describes novel host-guest systems comprising viologen cations (guests) and the derivatives of bis-para-phenylene-34-crown-10 (hosts) with anionic groups COO(-) or SO(3)(-). The structure of the resulting charge-compensated host-guest complexes, their association constants and their electrochemical behaviour have been studied. In the solid state, the viologen cations thread the negat...

Journal: :The Journal of biological chemistry 2003
Adrian C Apetri Witold K Surewicz

Prion diseases are associated with the conversion of cellular prion protein, PrPC, into a misfolded oligomeric form, PrPSc. Previous studies indicate that salts promote conformational conversion of the recombinant prion protein into a PrPSc-like form. To gain insight into the mechanism of this effect, here we have studied the influence of a number of salts (sodium sulfate, sodium fluoride, sodi...

2015
Ikumi Oyabu Yoshinori Iizuka Hubertus Fischer Simon Schüpbach Gideon Gfeller Anders Svensson Manabu Fukui Jørgen Peder Steffensen Margareta Hansson

This study reports the chemical composition of particles present along Greenland’s North Greenland Eemian Ice Drilling (NEEM) ice core, back to 110,000 years before present. Insoluble and soluble particles larger than 0.45μm were extracted from the ice core by ice sublimation, and their chemical composition was analyzed using scanning electron microscope and energy dispersive X-ray spectroscopy...

Journal: :The Journal of General Physiology 1945
W. F. H. M. Mommaerts

THE RESULTS OF THE STUDY OF THE INHIBITING EFFECT OF NEUTRAL SALTS UPON THE CLOTTING TENDENCY OF FIBRINOGEN BY THROMBIN MAY BE SUMMARISED AS FOLLOWS: Salts like NaCl and KCl inhibit only weakly. Salts of the same cation (K(*)) with monovalent anions of different ionic radius are the more active the larger the anion (Cl',Br',I'). Salts of the same cation with anions of different valency are the ...

Journal: :Physical chemistry chemical physics : PCCP 2015
Eugen Wuckert Marc D Harjung Nadia Kapernaum Carsten Mueller Wolfgang Frey Angelika Baro Frank Giesselmann Sabine Laschat

The use of non-ionic LC phases as anisotropic matrices for E/Z-isomerization of azo-guest molecules is often restricted due to limited solubilities and demixing effects. In this study we therefore employed an ionic liquid crystal (ILC) matrix to follow the photo-induced E/Z-isomerization of ionic mesogenic azobenzene guanidinium guests. The latter were prepared from 4-hydroxy-4'-(octyloxy)azobe...

Journal: :Molecules 2012
Dorian C Grothe Wolfdietrich Meyer Silvia Janietz

Acrylate functionalized ionic liquids based on tetraalkylammonium salts with terminal acrylates- and methylacrylates were synthesized. Melting points and ionic conductivity of twenty compounds in six groups were determined. Within one group the effect of three different counterions was investigated and discussed. The groups differ in cationic structure elements because of their functional group...

Naser Akhlaghi Siavash Riahi

The interfacial tension of surfactant solutions is decreased with increasing surfactant concentration to obtain the critical micelle concentration (CMC). After that, the CMC values does not alter much. So this concentration is a critical point during surfactant flooding that is one of the chemical EOR techniques. The reduction of the CMC value is taken into consideration, since the surfactant f...

2015
J. U. Reveles Tunna Baruah Rajendra R. Zope

The neutral copper aluminum cluster complex Al12CuM3 [M = K, K3O, and K(2,2,2-crypt)] has been investigated at the PBE96 level of theory. It is found that Al12Cu could be considered a superatom mimic of a phosphorus atom. It shows large electron affinity and is able to receive three electrons from elements or compounds with low ionization energies like K, K3O, or K(2,2,2-crypt) to become a stab...

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