GC and MS were used for the analysis of Croatian Centaurium erythraea Rafn essential oil (obtained by hydrodistillation) and headspace (applying headspace solid-phase microextraction). The headspace contained numerous monoterpene hydrocarbons (the major ones were terpinene-4-ol, methone, p-cymene, γ-terpinene and limonene). Oxygenated monoterpenes were present in the headspace and oil, while 1,...

Alternative methods of control against different parasites affecting livestock and agriculture are currently being sought. The essential oil Peumus boldus Molina has anthelmintic insecticidal activity the nematode Haemonchus contortus stored cereal insect pests. present study aimed to assess in vitro P. H. (L3) unsheathed Sitophilus zeamais, Tribolium castaneum, Plodia interpunctella. was obtai...

Abstract A terpene‐based biorefinery is described that uses crude sulfate turpentine (CST) and gum (GT) to produce mixtures of p ‐menthadienes ( ‐MeDs) as biorenewable terpene feedstocks. An acid catalyzed ring opening reaction (6 m aq. H 2 SO 4 , 90 °C) first used convert the major bicyclic monoterpenes (α‐pinene, β‐pinene, 3‐carene) in untreated CST (or GT with 5 mol% Me S) into monocyclic ‐M...

J. Entomol. Sci. 38(4): 602-611 (October 2003) Abstract We conducted seven experiments in stands of mature lodgepole pine in southern B r i t i s h C o l u m b i a t o e l u c i d a t e t h e r o l e o f h o s t volatiles i n t h e s e m i o c h e m i c a l e c o l o g y o f t h e p i n e engraver, Ips pini (Say) (Coleoptera: Scolytidae), with particular reference to the behavioral responses of...

Rosmarinus officinalis L. is a perennial herb that belongs to the Lamiaceae family. It is used as a food flavouring agent, and well known medicinally for its powerful antimutagenic, antibacterial and chemopreventive properties. The most applicable method for extraction of essential oil is water distillation (WD) and steam distillation (SD). It is a traditional technique which is used in most in...

      The chemical composition of the essential oil obtained from the aerial parts of Laurus nobilis L. has been examined by gas chromatography (GC) and GC- mass spectrometery (MS). The main components of the oil were identified. 1,8-Cineole was the major component in the oil together with b-terpinyl acetate, terpinene-4-ol, a-pinene, b-pinene, p-cymene, linalool and ...