Bis-functionalized ferrocenyl units have been attached to organo-functionalized [(R(F)Sn)4S6] double-decker clusters as criss-cross-type intramolecular straps. Two different ways of linking result in different crystal structures and different electrochemical stabilities of the resulting compounds.

The electronic density of states (DOS) plays a central role in controlling the charge-carrier transport amorphous organic semiconductors, while its accurate determination is still challenging task. We apply low-temperature fractional thermally stimulated luminescence (TSL) technique to determine DOS pristine films light-emitting diode (OLED) host materials. width determined for two series hosts...

In this paper we describe new multi-catalysis cascade (MCC) reactions for the one-pot synthesis of highly functionalized non-symmetrical malonates. These metal-free reactions are either five-step (olefination/hydrogenation/alkylation/ketenization/esterification) or six-step (olefination/hydrogenation/alkylation/ketenization/esterification/alkylation), and employ aldehydes/ketones, Meldrum's aci...

background: polychlorinated biphenyls (pcbs) are synthetic aromatic compounds containing two benzene rings with one to ten chlorine atoms. there are concerns about the health risks of these compounds in the environment due to their toxicity, persistence, and biological accumulation. pcbs wastes must be treated before being discharged to the environment because they will pollute the water, soil,...

DNA damage is unavoidable, and organisms across the evolutionary spectrum possess DNA repair pathways that are critical for cell viability and genomic stability. To understand the role of base excision repair (BER) in protecting eukaryotic cells against alkylating agents, we generated Schizosaccharomyces pombe strains mutant for the mag1 3-methyladenine DNA glycosylase gene. We report that S. p...

the reaction of readily available 1 -methyl-4-nitropyrrole-2- carboxylic acid (1) with thionyl chloride afforded the corresponding acyl chloride 2. the reaction of compound 2 with thiosemicarbazides yielded 1-(1 -methyl-4-nitrop yrrole-2-carbony1)- thiosemicarbazides (3) which cyclized in basic medium to 5-(1-methyl-4-nitropyrrole- 2-y1)-2,4-dihydro-3h- l,2,4-triazole-3- thione 4. alkylation an...

The oxidative degradation of biphenyl and polychlorinated biphenyls (PCBs) is initiated in Pandoraea pnomenusa B-356 by biphenyl dioxygenase (BPDO(B356)). BPDO(B356), a heterohexameric (αβ)(3) Rieske oxygenase (RO), catalyzes the insertion of dioxygen with stereo- and regioselectivity at the 2,3-carbons of biphenyl, and can transform a broad spectrum of PCB congeners. Here we present the X-ray ...

Pseudomonas acidovorans M3GY is a recombinant bacterium with the novel capacity to utilize a biphenyl congener chlorinated on both rings, 3,4'-dichlorobiphenyl (3,4'-DCBP), as a sole carbon and energy source. Strain M3GY was constructed with a continuous amalgamated culture apparatus (L. Kröckel and D. D. Focht, Appl. Environ. Microbiol. 53:2470-2475, 1987) with P. acidovorans CC1(19), a chloro...

Structures of all the synthesized compounds have been corroborated on the basis of elemental IR, H NMR, C NMR and Mass spectro-analytical data. Many Schiff bases were prepared by condensation reaction of compounds containing biphenyl carboxylic acid with aromatic aryl aldehydes derivatives with Thiazoldine-4-one. The synthesized compounds 4'-{2-[4-[2(Substituted-phenyl)-4-oxo-thiazolidin-3-yl]-...

Alkylation of ribonuclease A by iodoacetamide at pH 5.5 yields two products: inactive 3-carboxamidomethylhistidine12.ribonuclease and fully active S-carboxamidomethylmethionine ribonuclease. No derivative substituted at histidine-119 was detected. This is in marked contrast to the products obtained on alkylation by iodoacetate at pH 5.5. The rate of alkylation of histidine in ribonuclease by io...