The present work provides solid-state 13C NMR spectroscopic evidence that the zeolites acidity and the pore size strongly affect the catalytic behavior of ethylbenzene disproportionation and coke formation. The medium-pore zeolite H-ZSM-5 (ca. 0.56 nm) and the large-pore zeolite H-Y (ca. 0.74 nm...

Zeolites La,Na-Y are important catalysts for industrial FCC units due to their acidic properties and stability. The ethylbenzene disproportionation on this zeolite was suggested as a standard test reaction for acidic zeolites by the Catalysis Commission of the International Zeolite Association (...

The enantioselectivity of reactions catalyzed by ethylbenzene dehydrogenase, a molybdenum enzyme that catalyzes the oxygen-independent hydroxylation of many alkylaromatic and alkylheterocyclic compounds to secondary alcohols, was studied by chiral chromatography and theoretical modeling. Chromat...

Landfilling is the most common disposal of municipal waste. During the decomposition of different waste materials, several toxic compounds are leached. Although organotin compounds (OTC) represent an important group of pollutants in landfill leachates, there are only few analytical procedures re...

The octyltin stabilizer ZK 30.434 is a mixture of 80% dioctyltin diisooctylthioglycolate (DOTTG) and 20% of monooctyltin triisooctylthioglycolate (MOTTG) and is used as stabilizer for rigid polyvinylchloride (PVC) materials. One of the applications of such stabilized films is the packaging of fo...

The toxicity and bioaccumulation of organotin compounds (OTCs) led to the development of sensitive and selective analytical methods for their determination. In the past much attention was assigned to the study of OTCs in biological samples, water and sediments, coming mostly from marine environm...

The development and validation of a method for organotin analysis in soils, including butyl-, phenyl- and octyltins, are described in this study. The influence of pretreatment step based on sample lyophilisation was first studied. Different solid–liquid extraction techniques including mechanica...

The perturbation in the growth and fatty acid profile of the microscopic fungus Cochliobolus lunatus IM 4417 in the presence of octyltin compounds (trioctyltin – TOT, dioctyltin – DOT and monooctyltin – MOT) was studied. Fungal resistance to the tested organotins decreased with a reduction in...

A combined experimental and theoretical study of the structure, vibrational spectra and electronic spectra of 2-amino-4-hydroxy-6-methylpyrimidine in the ground electronic state are reported. Anharmonic frequencies for the most stable conformer have been simulated using GVPT2, VSCF and PT2-VSCF ...

The proton transfer (PT) complex of 2-amino-4-hydroxy-6-methylpyrimidine (AHMP) with salicylic acid (SA) has been synthesized and their crystal has been grown by slow evaporation technique. Further, the crystal has been investigated by single crystal X-ray diffraction (SCXRD). The complex crysta...

The thermal decomposition of dioctyltin maleate (DOTM) and a blend of PVC and DOTM has been studied in air, nitrogen and under vacuum. TG was used to examine the effect of different amounts of DOTM on stability. The PVC/DOTM mixture shows delayed dehydrochlorination in both the air and inert env...

In the present study, dioctyltin chloride (DOTC: 100 mg/kg, BW) was orally administered to immature (30-day-old) male rats, and the acute toxic effects were studied. Di- and monooctyltin (its metabolite) accumulations were mainly detected in the liver, and peaked 48 h later. A similar pattern wa...

Based on previous studies, dioctyltin dichloride [DOTC] was a putative toxophore for dioctyltin thioesters. Our results, generated with the use of 119Sn-NMR spectroscopy demonstrated that dioctyltin bis(2-ethylhexyl thioglycolate) [DOTE] hydrolyzed to form dioctyltin chloro-(2-ethylhexyl thiogly...

For the first time, erect and flaky particles of tin oxides (SnO2), as anode materials for lithium ion batteries (LIBs), were prepared by a calcination method using dioctyltin oxide as the starting material. The samples calcined at 300, 500 and 700 °C under the air conditions were nominated as ...

In order to improve the signal to noise ratio in ratiometric oxygen sensing, comparable phosphorescence and fluorescence intensities are required. To balance the room temperature phosphorescence (RTP) and fluorescence intensities, lutetium labeled hematoporphyrin monomethyl ether (Lu-HMME) was u...

Regardless of the ratio of reagents, the interaction of the (O→Ge)-chelate,bis-(lactamo-N-methyl)-cis-dichlorogermanes with trimethylsilyltriflate in acetonitrile, proceeds with substitution of one chlorine atom by the triflate group resulting in products with an inversion of configuration at t...

Simple receptors for the recognition and solubilisation of insoluble tartaric acid in chloroform were designed and synthesised for the first time. Receptors 2 and 3 were successful in solubilising tartaric acid into chloroform forming a 1:1 complex, and were also found to be useful as fluorescen...

All of the stereoisomers of the components of the female-produced sex pheromone of a moth, Lyclene dharma dharma, were synthesized. They are (R)- and (S)-6-methyl-2-octadecanone, (6R,14R)-, (6R,14S)-, (6S,14R)-, and (6S,14S)-6,14-dimethyl-2-octadecanone, and (R)- and (S)-14-methyl-2-octadecanone...

Bindings of glutamate receptor agonists and related modulators were investigated in 10 discrete tissues from gerbil brain using a biochemical technique. There appeared considerable discrepancies, in respect of intrahippocampal profiles, from reported data by autoradiography on rat brain. In the ...

Reductive dechlorination of polychlorinated biphenyls (PCBs) pre-existing (at ≈1 mg kg−1) in a marine sediment of Porto Marghera (Venice Lagoon, Italy) was investigated in anaerobic slurries developed in water of the same contaminated site. Some microcosms were pasteurized whereas others were a...