Most liquid fuels contain compounds with one or more unsaturated CC bonds. Previous studies have observed that the fuel reactivity and ignition behavior are strongly influenced by the presence and number of double bonds in the fuel molecular structure. Here, we report a numerical investigation on the effect of fuel unsaturation on PAHs and soot emissions in partially premixed flames (PPFs) bur...

Estimation of worst-case execution times (WCETs) is required to validate the temporal behavior of hard real time systems. Heptane is an open-source software program that estimates upper bounds of execution times on MIPS and ARM v7 architectures, offered to the WCET estimation community to experiment new WCET estimation techniques. The software architecture of Heptane was designed to be as modul...

A mechanism generator code to automatically generate mechanisms for the oxidation and combustion of large hydrocarbons has been successfully modified in this work. The modification was through: (1) improvement of the existing rules such as cyclic-ether reactions and aldehyde reactions, (2) inclusion of some additional rules to the code, such as ketone reactions, hydroperoxy cyclic-ether formati...

«-heptane has been effectively used to prepare arteficial bilayer membranes. The viscoelastic and/or mechanical properties of the arteficial membranes vary with changes in the lipid/organic solvent ratio (Hianik et al. 1984). Also changes in cell membrane fluidity are known to correlate with the activities of certain membrane-bound enzymes (Yuli et al. 1981; Stubbs and Smith 1984). membrane rec...

asphaltenes are the n-pentane or n-heptane insoluble fractions of crude oil that remain in solution under reservoir temperature and pressure conditions. they are destabilized and start to precipitate when the pressure, temperature and/or composition changes occur during primary production. the precipitated asphaltene particles will then grow in size and may start to deposit onto the production ...

In the title compound, C(34)H(31)N(5), the observed molecular geometry suggests that anomeric effects are present in terms of short C-N bond lengths and reduced pyramidality of the N atoms.

In the title compound, C14H19N3S, the seven-membered cyclo-heptane ring adopts a chair conformation. An intra-molecular N-H⋯N hydrogen bond [graph-set motif S(5)] is present in the N-N-C-N chain between the ring systems. An intra-molecular C-H⋯S contact also occurs. In the crystal, pairs of mol-ecules form centrosymmetric dimers through N-H⋯S hydrogen bonds [graph-set R 2 (2)(8)]. These dimers ...

The effect of steady strain on the transient autoignition of n-heptane at high pressures is studied numerically with detailed chemistry and transport in a counterflow configuration. Skeletal and reduced n-heptane mechanisms are developed and validated against experiments over a range of pressure and stoichiometries. Two configurations are investigated using the skeletal mechanism. First, the ef...