Herbivores emit volatile organic compounds (VOCs) after feeding on plants. Parasitoids exploit these VOCs as odor cues to locate their hosts. In nature, host-related odors are emitted as blends of various compounds occurring in different proportions, and minor blend components can sometimes have profound effects on parasitoid responses. In a previous related study, we identified and quantified ...

In this work the thermal diffusion behavior of binary mixtures of linear alkanes (heptane, nonane, undecane, tridecane, pentadecane, heptadecane) in benzene has been investigated by thermal diffusion forced Rayleigh scattering (TDFRS) for a range of concentrations and temperatures. The Soret coefficient ST of the alkane was found to be negative for these n-alkane/benzene mixtures indicating tha...

-Dufour glands of minor workers of Camponotus aegyptiacus contain a mixture of linear and methyl branched hydrocarbons and a trace of dodecyl acetate. Major workers contain a similar mixture of hydrocarbons but also large quantities of dodecyl acetate, some other long chain acetates and traces of propionates and farnesyl acetate. Cataglyphis savignyi has pentadecane as the most abundant compoun...

Additive models for molecular parameters have a long history, and remain important for the rapid prediction of molecular properties. To test the validity of an additive approach, we study the polarizabilities of methyl branched alkanes in the terahertz spectral range, and compare these to the polarizabilities of their straight chain counterparts. A single branched methyl group increases the iso...

Cereal Chem. 73(6):744-750 Lesser grain borer (Rhyzopertha dominica), red flour beetle (Tribolium flour beetle caused some off-odor. The other three insects caused little or castaneum), rice weevil (Sitophilus oryzae), saw-toothed grain beetle no objectionable odor, even though infestation was heavy. High concen(Oryzaephilus surinamensis), and rusty grain beetle (Cryptolestes fertrations of 2-p...

Gonocerus acuteangulatus (Goeze) (Hemiptera: Coreidae) is one of the most harmful hazelnut pests in Europe and Turkey, responsible for affecting seriously crop quality with its feeding activity. Chemical control is very difficult to achieve due to its high mobility and polyphagy; however, it is currently the only available method to reduce effectively damage by bugs. Therefore, a two-year study...

A cobalt–N-heterocyclic carbene (NHC) catalyst efficiently promotes an ortho C–H alkenylation reaction of pivalophenone N–H imine with an alkenyl phosphate. The reaction tolerates various substituted pivalophenone N–H imines as well as cyclic and acyclic alkenyl phosphates. Introduction Transition-metal-catalyzed, directing group-assisted arene C–H activation reactions have been extensively stu...

Accurate solvation parameters have been established using solely gas/liquid partition data by gas/chromatography from the Kováts group (Laffort et al. J. Chromatog. A, 2005, 1100, 90-107). Because these chromatographic data have been recently updated (Kováts and Kresz, J. Chromatog. A, 2006, 1113, 206-219), the solvation parameters of the involved solutes and stationary phases have been entirel...