The composition of the essential oil extracted from Valeriana hardwickii Wall. roots growing wild in Talle Valley of Arunachal Pradesh, Eastern Himalaya was analyzed by capillary GC and GC/MS. Thirty-one compounds representing 89.6% of the total oil were identified. The oil was found to be rich in sesquiterpenes from which oxygenated sesquiterpenes (25.7%). Methyl linoleate (21.1%) and Valerace...

Major volatiles from young and mature leaves of different citrus types were analyzed by headspace-solid phase microextraction (HS-SPME)-GC-MS. A total of 123 components were identified form nine citrus cultivars, including nine aldehydes, 19 monoterpene hydrocarbons, 27 oxygenated monoterpenes, 43 sesquiterpene hydrocarbons, eight oxygenated sesquiterpenes, two ketones, six esters and nine misc...

BACKGROUND Helichrysum italicum (Asteraceae) is a small shrub endemic to the Mediterranean Basin, growing in fragmented and diverse habitats. The species has attracted attention due to its secondary metabolite content, but little effort has as yet been dedicated to assessing the genetic and metabolite diversity present in these populations. Here, we describe the diversity of 50 H. italicum popu...

This review covers literature data summarizing, on one hand, the chemistry of essential oils and, on the other hand, their most important activities. Essential oils, which are complex mixtures of volatile compounds particularly abundant in aromatic plants, are mainly composed of terpenes biogenerated by the mevalonate pathway. These volatile molecules include monoterpenes (hydrocarbon and oxyge...

background & aim:nepeta racemosa is an herbal and medicinal plant and this report aims to   identify chemical compositions of the essential oils and volatiles of its   aerial parts through classical and advanced methods.  experimental: chemical profiles of the essential oils and volatile compounds from the aerial parts of nepeta racemosa obtained through hydrodistillation (hd), solvent-free mic...

Capillary GC and GC-MS analysis of the essential oil from the cones of JUNIPERUS COMMUNIS L. grown wild in Greece showed a high content of alpha-pinene (ca 27%), sabinene (13%), germacrene-D (10%), and myrcene (9%). The total oil (yield 2.95%) consisted of almost 105 constituents, 77 of which representing 93.1% were identified. As the main component of the oxygenated monoterpenes was found the ...

the essential oil obtained by hydrodistillation of flowers of calycanthus floridus l. var.oblongifolius (nutt.) d.e. boufford & s.a. spongberg, planted in sabzevar, khorasan province(iran), was analyzed by gc and gc/ms. eighteen compounds representing 90.1% of theflower oil of calycanthus floridus l. var. oblongifolius were identified, among them 1,8-cineol(33.1%), bornyl acetate (14.1%), α-pin...

Biogenic emissions supply the largest fraction of non-methane volatile organic compounds (VOC) from the biosphere to the atmospheric boundary layer, and typically comprise a complex mixture of reactive terpenes. Due to this chemical complexity, achieving comprehensive measurements of biogenic VOC (BVOC) in air within a satisfactory time resolution is analytically challenging. To address this, w...