Modular fenchyl phosphinites (FENOPs) containing different aryl units-phenyl (1), 2-anisyl (2), or 2-pyridyl (3)-are efficiently accessible from (-)-fenchone. For comparison of the influence of the different aryl units on enantioselectivities and reactivities, these FENOPs were employed in Pd-catalyzed allylic alkylations. The strongly chelating character of P,N-bidentate 3 is apparent from X-r...

Clove buds and lemongrass leaves were collected from three different locations of India and the essential oil was separated by hydrodistillation procedure. The essential oils were studied for its variation in physical properties and chemical composition. Chemical analysis by GC-MS evidenced that the main components of clove oil (CLV) were eugenol (78.5-87.7%) and caryophyllene (12.3-20.2%) and ...

Different mixtures of monoterpenes (ketone, alcohol, and alkene) were loaded on paper discs and wax and their knockdown activities were evaluated against Culex pipiens adults. Some individual monoterpenes were also evaluated by residual toxicity technique. Citronella oil as a reference was also loaded separately or in combination with monoterpenes on paper discs and wax. The ketone monoterpenes...

The use of synthetic larvicides to control vector populations is detrimental to human and environmental health and selects for insecticide resistance. Plants can be alternative sources of effective and safe mosquito control agents. In the present work the chemical composition and larvicidal activity, of essential oil of Lavandula stoechas (lamiaceae), growing in wilds of Morocco, against the ma...

The barks of two endemic Commiphora species namely, Commiphora ornifolia (Balf.f.) Gillett and Commiphora parvifolia Engl., were collected from Soqotra Island in Yemen and their essential oils were obtained by hydrodistillation. The chemical composition of both oils was investigated by GC and GC-MS. Moreover, the essential oils were evaluated for their antimicrobial activity against two Gram-po...

BACKGROUND Hydrodistillation (HD) and steam-distillation, or solvent extraction methods of essential oils have some disadvantages like thermal decomposition of extracts, its contamination with solvent or solvent residues and the pollution of residual vegetal material with solvent which can be also an environmental problem. Thus, new green techniques, such as supercritical fluid extraction and m...

Abstract We conducted studies with the native woodwasp Sirex nigricornis F. (Hymenoptera: Siricidae) in Louisiana to identify host-associated olfactory stimulants that may include attractive semiochemicals for this species as well noctilio F., an invasive can attack healthy trees. Loblolly pines (Pinus taeda L.) treated a stressing agent were felled and chipped 1–2 mo after treatment, chips ste...

In this study, we investigated the effects of additional ultraviolet radiation (UV) on main growth fluorescent lamp light pigment content and essential oil accumulation in sweet basil (Ocimum basilicum L.). Three different UV sources from light-emitting diodes discharge lamps, which emit UV-A (315–400 nm), UV-B (280–315 nm) UV-C (100–280 ranges, were tested for plant growing. The plants, growin...