Females of the parasitoid wasp Trichogramma turkestanica produce the putative polydeoxypropionates (2E,4E,6S,8S,10S)-4,6,8,10-tetramethyltrideca-2,4-diene and (2E,4E,6S,8S,10S)-4,6,8,10-tetramethyltrideca-2,4-dien-1-ol or their enantiomers as sex specific volatiles. The structures were assigned on the basis of GC-MS investigations using synthetic reference compounds.

The extended Wannier model describes the propagation of two-electron wave packet along the Wannier ridge from the reaction zone (where it is formed by (y, 2e) or (e, 2e) process) to the zone of free electron motion. The angular correlation patterns are calculated and analyzed for lSe and IPo states of the two-electron continuum.

*Correspondence: [email protected] African University of Science and Technology, Abuja, Nigeria Abstract Let E be a real normed space with dual space E∗ and let A : E→ 2E be any map. Let J : E→ 2E be the normalized duality map on E. A new class of mappings, J-pseudocontractive maps, is introduced and the notion of J-fixed points is used to prove that T := (J – A) is J-pseudocontractive if an...

The vehicle routing problem is one of the most studied combinatorial optimization topics, due to its practical importance and methodological interest. Yet, despite extensive progress, many recent studies are hampered by limited access simple efficient open-source solution methods. Given sophistication current algorithms, reimplementation becoming a difficult time-consuming exercise that require...

This paper presents an approximate algorithm based on distributed learning automata for solving capacitated vehicle routing problem. The vehicle routing problem (VRP) is an NPhard problem and capacitated vehicle routing problem variant (CVRP) is considered here. This problem is one of the NP-hard problems and for this reason many approximate algorithms have been designed for solving it. Distrib...

The recent research on the CVRP is being slowed down by the lack of a good set of benchmark instances. The existing sets suffer from at least one of the following drawbacks: (i) became too easy for current algorithms; (ii) are too artificial; (iii) are too homogeneous, not covering the wide range of characteristics found in real applications. We propose a new set of instances ranging from 100 t...

The extent of the burnt zone has been established by drilling. The thickest section, about 75 metres deep, underlies the Dry Lake gulch near the base of the coal measures. Other profiles of the bllrnt zone give an average thickness of about 25 metres, although thinning and some discontinuity is appartlnt. The present area of the burnt zone amounting to about 3.5 square kilometres is evidently o...

SnO 2 supported single metal atoms offer unique bifunctional catalyst materials for electrochemical synthesis of hydrogen peroxide via 2e-ORR and 2e-WOR.

In this paper, new (2E, 2'E)-3, 3'-(((3- hydroxypropane-1, 2-diyl) bis (oxy)) bis (2, 1-phenylene)) bis (1-phenylprop-2-en-1-one) (2a) was prepared in good yield by condensation reaction of acetophenone with bisaldehyde (1a) in ethanolic NaOH solutions at room temperature. The (2E, 2'E)-3, 3'-(((3- hydroxypropane-1, 2-diyl) bis (oxy)) bis (2, 1-phenylene)) bis (1-phenylprop-2-en-1-one) (2a) was...