The aliphatic hydrocarbons play an increasing role as solvents in different industries and the appraisal of the hazards connected with their use offers considerable difficulties because most of these solvents represent mixtures, sometimes of heterogeneous nature, and because their composition is frequently only incompletely known. In order to evaluate the potential dangers of such mixtures it i...

A series of trivalent lanthanide and group 3 metal coordination polymers with pyromellitic acid [M(Hbtec)]n (M = Eu, Dy, Sm, Nd, Ce, Er, Y) has been synthesized structurally characterized. Contrary to most polymers, the reported compounds do not present any crystallized solvent molecules, consequently they are thermally stable until 400–500 °C. Moreover, also exhibit good stability in water on ...

Crystal packing and chromophore communication are key parameters for the performance functionality of many applications related to light-energy harvesting conversion. However, obtaining crystals flexible very soluble structures is troublesome. Nevertheless, a crystal structure highly perylene-3,4 : 9,10-tetracarboxylic acid bisimide (PBI) cyclophane was obtained analysed compare arrangement in ...

Rise and delay times of mixtures of methane, propane, n-butane, iso-butane and isooctane mixed with air ignited by transient plasma discharge were investigated and compared with spark discharge ignition. Multi-ignition site effect and high electron energy are suggested to contribute to shortening of rise and delay times.

The patterns of use and related harm of solvent inhalation were investigated in a group of young people who misused toluene (n = 31) and a group misusing butane (n = 12). The two groups were similar in terms of patterns of use and solvent related harm. The toluene users were more likely to sniff only in a group setting, probably because of the long duration of intoxication. The toluene group we...

Annulation of thiophenes directly into the bay regions of rylene dyes through effective Stille coupling and subsequent ring-fusion under Scholl conditions leads to core-extended rylene tetracarboxylic diimides with interesting electro-optical properties.

Alkane monooxygenases in Nocardioides sp. strain CF8 were examined at the physiological and genetic levels. Strain CF8 can utilize alkanes ranging in chain length from C(2) to C(16). Butane degradation by butane-grown cells was strongly inhibited by allylthiourea, a copper-selective chelator, while hexane-, octane-, and decane-grown cells showed detectable butane degradation activity in the pre...

The title mol-ecule, C(11)H(12)N(2)O(4), consists of a 3-aza-bicyclo-[3.2.0]heptane group containing a nearly planar cyclo-butane ring (r.m.s. deviation of fitted atoms is 0.0609 Å), fused to a pyrrolidine ring, bonded to a 2,6-dioxopiperidine ring at the 3-position. The angle between the mean planes of the cyclo-butane and fused pyrrolidine ring is 67.6 (6)°. The dihedral angles between the me...