Dastarcus helophoroides Fairmaire (Coleoptera: Bothrideridae) is an effective predatory beetle of larvae and pupae of several cerambycid beetles including Monochamus alternatus and Anoplophora glabripennis. Electroantennography (EAG) and a dynamic two-choice olfactometer were respectively used to measure the antennal and behavioral responses of both sexes to selected volatile compounds. Female ...

Abstract. Chemical ionization mass spectrometry with the nitrate reagent ion (NO3- CIMS) was used to investigate products of radical (NO3) initiated oxidation four monoterpenes in laboratory chamber experiments. α-Pinene, β-pinene, Δ-3-carene, and α-thujene were studied. The major gas-phase species produced each system distinctly different, showing effect monoterpene structure on mechanism furt...

The essential oil composition of Rhus cotinus L. (syn. Cotinus coggygria Scop.; Family: Anacardiaceae), was analyzed by GC and GC-MS. The in vitro antioxidant activity was assessed by β-carotene bleaching test, reducing power, DPPH radical scavenging and inhibition of lipid peroxidation methods. A total of 30 compounds were identified with the dominance of monoterpenes (65.9%) viz. β-Pinene, ca...

To better understand precursors of dicarboxylic acids in ambient secondary organic aerosol (SOA), we studied C4–C9 present SOA formed from the oxidation toluene, naphthalene, α-pinene, and isoprene. were analyzed by offline derivatization gas chromatography–mass spectrometry. We revealed that C4 including succinic acid, maleic fumaric malic DL-tartaric meso-tartaric acid are produced photooxida...

Alpinia monopleura is an endemic plant which widespread and abundant in Sulawesi. Nevertheless, previous studies have not studied the chemical compound biological activity. This study describes compounds antibacterial antioxidant properties of essential oils isolated from A. monopleura. The oil was obtained by hydro distillation method interpreted GCMS. Antibacterial were determined agar diffus...

Salvia rosmarinus Spenn (synonym: Rosmarinus officinalis L.) is economically and medically important grows naturally in Al-Marj (Libya). Macro, micro morphological chemical characteristics were studied. Leaf venation, leaf anatomy compounds of essential oils carried out according to traditional methods. The objective the present study provide detailed description this species. Morphological cha...

Essential oils are a rich source of compounds for botanical pesticides. This study aimed to characterize the chemical composition essential oil from parsley seeds and its phytotoxicity against germination initial growth wheat mustard. The main were α-pinene, β-pinene, apiol. In Petri dish experiment, inhibited both species. However, seedlings species was more inhibited, especially wheat. conclu...

BACKGROUND Montanoa guatemalensis is a small to medium-sized tree in the Asteraceae that grows in Central America from Mexico south through Costa Rica. There have been no previous investigations on the essential oil of this tree. METHODS The leaf essential oils of M. guatemalensis were obtained from different individual trees growing in Monteverde, Costa Rica, in two different years, and were...