The decompositions of doubly-charged ions given by a number of C3 —C8 aliphatic and alicyclic hydrocarbons have been investigated in a double-focusing mass spectrometer. Many processes were found in which high kinetic energy CH3+ and C2H3+ ions are formed. Doubly-charged ions fragment by more than one route and in many cases, high kinetic energy fragment ions are formed in at least two differen...

Volatile compounds in honey samples of different botanical origins were investigated. Solid phase microextraction (SPME) and gas chromatography-mass spectrometry (GC/MS) revealed a total of 86 compounds in the headspace of 4 types of honey – multifloral, heather, buckwheat and lime-honeydew. The chemical composition of the headspace was very diverse, owing to the presence of compounds from diff...

The absorption spectra of nitric oxide in aromatic and aliphatic hydrocarbons, in alcohols and in water were investigated. The experimental results show that the broad structureless absorption bands observed rise from charge transfer between the solvent and NO. Thermochemical data indicate that the solvent-NO interactions are due to contacts in solution without the formation of a stable complex...

An acute confusional state was observed to follow heavy exposure to polyurethane gloss paint fumes in a previously healthy 60 year old man. This state remitted over a 3-day period, but was followed by transient bone marrow suppression and evidence of liver cell damage. The corroborated absence of other toxins and the temporal association of exposure to paint fumes suggest that a volatile paint ...

Fig. 1. An engineering technologist sets up an apparatus in which PCB-contaminated liquid will be exposed to chemicals which remove the chlorine from the compound, transforming the PCBs into non-regulated chemicals. Base-catalyzed destruction (BCD) of polychlorinated biphenyls (PCBs) is a process in which the halogen molecules on PCBs are replaced with aliphatic hydrocarbons (or in some cases h...

The applications of carbon nanotubes (CNTs) as catalysts have attracted much interests in catalysis community due to their unique porous microstructure and chemical properties. One of the promising results is the use of CNTs in the oxidative dehydrogenation (ODH) of ethylbenzene to styrene [1,2]. However, only few works were reported on the use of CNTs or other carbonaceous materials to catalyz...

The intrinsic biodegradability of hydrocarbons and the distribution of proficient degrading microorganisms in the environment are very crucial for the implementation of bioremediation practices. Among others, one of the most favorable methods that can enhance the effectiveness of bioremediation of hydrocarbon-contaminated environment is the application of biosurfactant producing microbes. In th...

Halogenated aliphatic compounds were evaluated for toxic and genotoxic effects in the somatic mutation and recombination test employing Drosophila melanogaster. The tested chemicals included chlorinated, brominated and iodinated; mono-, di- and tri-substituted; saturated and unsaturated alkanes: 1,2-dibromoethane, 1-bromo-2-chloroethane, 1-iodopropane, 2,3-dichloropropene, 3-bromo-1-propene, ep...

This study aimed to establish primary reactions and identify gaseous products during fast pyrolysis of low-density polyethylene (LDPE), polypropylene (PP) polystyrene (PS). Fast was performed by using Py-GC/MS/FID at 574 ± 22 °C for 5 s. Gaseous fractions formed LDPE, PP PS were 14 1 wt%, 31 3 wt% 103 12 respectively. The main compounds from LDPE butane, 1-pentane 1-hexene. gave propene, pentan...

AIM The parent of xGraptoveria, Graptopetalum paraguayense, is used in Chinese folk medicine for alleviating hepatic disorders, detumescence and detoxication, lowering of blood pressure, inhibition of cancer cells, exerting diuretic effects, relieving pain and infections. No data are available regarding its anti-conjunctivitis effect. The aim of this preliminary study is to test the anti-conjun...