The benzophenone-photosensitized decomposition of ethyl diazomalonate in 1,3-cyclooctadiene led to trans-bicyclo[6.1.0]non-cis-2-ene, a new strained ring system. The function of the photosensitizer is to convert Z,Z-1,3-cyclooctadiene into the E,Z-isomer.
The hydrogenation of 1,3-cyclooctadiene and the CO–NO reaction have been studied on Cu/TiO 2 catalysts, with reference to the effects of the preparation method and of the reductive pretreatments of the samples. In the hydrogenation of 1,3-cyclooctadiene at 433 K, a marked difference in ...
Silica-immobilized Pd-complex catalyst was prepared and applied to the hydrogenation of 1,3-cyclooctadiene (1,3-COD). The characterization of catalyst was conducted by EA, ICP-AES, TG, differential TG and XPS analyses. The result revealed that Pd-complexes were successfully immobilized on the si...
A series of pumice-supported palladium-platinum bimetallic catalysts were prepared and investigated by X-ray scattering (WAXS and SAXS) and XPS techniques. An alloy Pd-Pt was formed. The less abundant metal was found to segregate to the surface. The catalysts were tested in the liquid-phase hydr...
The experimental densities, ρ for binary mixtures of (N-acetylmorpholine+benzene, +toluene, +ethylbenzene, and +mesitylene) have been measured at temperatures from (293.15 to 343.15) K and atmospheric pressure over the whole mole fraction range. From these results, excess molar volumes V E ...
The optical isomers of 4-[(N-allyl-3-methyl-4-piperidinyl)phenylamino]-N,N-diethylbenzamide (3) have been prepared and tested in both binding and functional assays. The data show that (-)-3 is responsible for the δ opioid activity demonstrated by the racemic material. This compound displays a...
The responses of olfactory bulbectomized (OBX) rats to antidepressant treatment are similar to those of depressed patients since chronic administration of an antidepressant reverses OBX-induced behavioral and physiological changes. Previously, using several animal models, it was demonstrated tha...
Four genes encoding ribosomal proteins HmaS17, HmaL14, HmaL24 and HS3, have been identified in the λEMBL3 clone PP*7 from a genomic library of the archaebacterium Halobacterium marismortui. The clone contains genes from the 'S10 and spectinomycin' operon equivalent region. Three of the deduced ...
Ribonucleoprotein (RNP) complexes participate in almost all macromolecular processes, including RNA processing, protein synthesis, and the signal recognition of proteins targeted for export. An understanding of these processes requires detailed knowledge of interactions at the molecular level, ...
To study the effect of antibiotics upon Mycoplasma bovis in fresh bovine semen just before freezing, specimens of bovine semen were artificially injected with 1 of 9 different strains of M. bovis. Inocula of each strain were prepared to contain 10 5 to 10 6 /mL colony-forming un...
This paper describes an efficient pattern recognition method for detecting vulnerable spots within an RNA sequence. Mutations in these spots may lead to a structural change that directly relates to a change in functionality. Previously, the concept was tried on RNA genetic control elements calle...
Aminoglycosides (AGs) are a large and diverse group of antibiotics. Although AGs may cause side effects of nephrotoxicity and ototoxicity, they are still occasionally being used for the treatment of serious infections. In this study the development of a method is described for the quantitative d...
The small mobilizable plasmid pALWED1.8 containing a novel variant of the streptomycin/spectinomycin resistance gene aadA27 was isolated from the permafrost strains of Acinetobacter lwoffii. The 4135bp plasmid carries mobА and mobC genes that mediate its mobilization by conjugative plasmids. Th...
To assess the organization of the Thermus thermophilus ribosomal protein genes, a fragment of DNA containing the complete S10 region and ten ribosomal protein genes of the spc region was cloned, using an oligonucleotide coding for the N-terminal amino acid (aa) sequence of T. thermophilus S8 pro...
The oxidative decarboxylation of aryl, α,α-diaryl, or arylalkylacetic acids has been achieved by a 2-nitrobenzenesulfonyl peroxy radical intermediate (I) generated by the reaction of 2-nitrobenzenesulfonyl chloride with potassium superoxide at -20°C in dry acetonitrile.
Michael addition reactions of acetoacetates and malonates with acrylates in a 5M KOH aqueous solution without using any other catalysts are described. When they are either tert-butyl or benzyl esters, the reaction proceeded very rapidly to afford moderate to high yields of the corresponding bis-...
Highly enantioselective Mannich reactions of imines bearing a benzothiazole moiety with tert-butyl acetoacetate, catalyzed by a cinchona-based squaramide organocatalyst have been developed. The corresponding benzothiazole β-keto ester derivatives were obtained in high yields (up to 99%) and wit...
We have studied the catalytic two-electron reduction of 3-chloro-2,4-pentanedione by cobalt(I) salen electrogenerated at a glassy carbon cathode in acetonitrile containing tetramethylammonium tetrafluoroborate. When cobalt(I) salen is electrogenerated at -0.65 V (a potential that is 30 mV more n...
Pentachlorophenol is the most toxic and recalcitrant chlorophenol because both aspects are directly proportional to the halogenation degree. Biological and abiotic pentachlorophenol degradation generates p-chloranil, which in neutral to lightly alkaline environmental conditions is hydrolyzed to ...
Melt processing of poly(l-lactic acid) (PLLA) can lead to both molar mass reduction and colour formation, which can alter properties critical for medical applications (e.g. biodegradation rate). In this work, ultra-violet/visible (UV–vis) spectroscopy was applied to in-line monitor the extrusio...
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