Results 231 to 240 of about 41,751 (271)

New ferroelectric: Bis-thiourea pyridinium bromide inclusion compound

Journal of Materials Research, 2012
Abstract
Czarnecki, Piotr, Pajzderska, Aleksandra, Wąsicki, Jan, Collet, Eric, Toupet, Loïc   +4 more
openaire   +1 more source

Orientation and Electronic Structure of Ion-Exchanged Pyridinium Compounds on Mica

Journal of Colloid and Interface Science, 2002
Abstract Monomolecular films of hexadecyl-(HDP) and methylpyridinium (MP) ions were prepared on muscovite mica from aqueous solutions via ion exchange. Electronic structure and orientation in the adsorbed films were determined with near-edge X-ray absorption fine structure spectroscopy (NEXAFS).
Mathias Zwahlen, Dorothee Brovelli, Walter Caseri, Georg Hähner   +3 more
openaire   +1 more source

Etherates and pyridinium compounds of mixed complex iodoacids of gallium(III)

Monatshefte f�r Chemie, 1981
The preparationof etherates and pyridinium compounds of mixed complex iodoacids of Ga(III) is reported together with some physical and chemical properties, as well as conductometric measurements and the ultraviolet and infrared spectra of the new compounds.
Dimitris Raptis, John K. Kouinis, Dionysios Kaminaris, Andreas G. Galinos   +3 more
openaire   +1 more source

Influence of acetyl-β-methylcholine, carbamoylcholine, and bis-pyridinium compounds on the activity of acetylcholinesterase

Biochemical Pharmacology, 1972
Abstract The decomposition rate of the substrate acetyl-β-methylcholine by AChE in presence of the antagonists TMB 4, ∗ toxogonin, † and HS 6 ‡ was measured in vitro . The results are compared with those of previous studies using acetylcholine as substrate.
openaire   +2 more sources

Pyridinium Dichlorobromate: A New Stable Brominating Agent for Aromatic Compounds

Synthesis, 2004
Pyridinium dichlorobromate (PyHBrCl 2 , 1) is a new example of iminium-trihalide complexes. The compound is prepared from pyridine and chlorine in the presence of aqueous hydrogen bromide. The crystalline trihalide is quite stable and acts as a safe source of positive bromine.
openaire   +1 more source

Synthesis and chemistry of thiazolo[3,2-a]pyridinium compounds

The Journal of Organic Chemistry, 1967
C K, Bradsher, J E, Boliek
openaire   +2 more sources

Inhibition of acetylcholinesterase by three new pyridinium compounds and their effect on phosphylation of the enzyme

1996
Three new compounds of the benzoyl-pyridinium type were prepared: 1-phenacyl-2-methylpyridinium chloride (1), 1-benzoylethyl-pyridinium chloride (2) and 1-benzoylethylpyridinium-4-aldoxime chloride (3) and assayed in vitro for their inhibitory effect on human blood acetylcholinesterase (AChE).
Škrinjarić-Špoljar, Mira, Burger, Nicoletta   +1 more
openaire  

Pyridinium, imidazolium and quinuclidinium compounds: synthesis, interaction with cholinesterases, and potential antidotes of organophosphorus compounds

2007
Organophosphorus compounds (OP) used as pesticides or warfare nerve agents are strong poisons. They inhibit acetylcholinesterase (AChE) by phosphylating its catalytic site. Substrates and reversible ligands can protect cholinesterases from phosphylation. On the other hand some compounds, due to their structure (mostly oximes) protect the enzyme as well
Tomić-Pisarović, Srđanka, Simeon, Vera, Odžak, Renata   +2 more
openaire   +1 more source

Studies in Water-Repellent Pyridinium Compounds

Textile Research, 1944
Ernest Zerner, Peter I. Pollak
openaire   +1 more source

Nicotinamide coenzyme regeneration by dihydropyridine and pyridinium compounds

Journal of the American Chemical Society, 1976
Keith E. Taylor, J. Bryan Jones
openaire   +1 more source