Thyme (Thymus vulgaris L.) is a commonly used flavoring agent and medicinal herb. Several chemotypes of thyme, based on essential oil compositions, have been established, including (1) linalool; (2) borneol; (3) geraniol; (4) sabinene hydrate; (5) thymol; (6) carvacrol, as well as a number of multiple-component chemotypes. In this work, two different T. vulgaris essential oils were obtained fro...

Aerial parts of Citrus aurantium L. were subjected to headspace (HS) and hydro-distillation (HD) techniques after drying, and then headspace volatiles and the essential oil were analyzed by GC/MS. Results of GC/MS analysis led to identification seventeen (99.8%) and sixteen (99.9%) constituents in samples extracted by HS methods in leaf and flower, respectively. (E)-β-ocimene (2.5%), Linalool (...

Hop-derived volatile organic compounds (VOCs) and their transformation products significantly impact beer flavour aroma. Geraniol, a key monoterpene alcohol in hops, has been reported to undergo yeast-modulated biotransformation into various terpenoids during fermentation, which impacts the citrus floral aromas of finished beer. This study monitored evolution geraniol its throughout fermentatio...

Lemongrass (Cymbopogon citratus) essential oil (EO) is a major source of bioactive compounds (BC) with anticancer activity such as ?-citral, limonene, geraniol, geranyl acetate, and ?-caryophyllene. Comparative studies about cytokinin effects on BC profiles in lemongrass are missing. Here, we evaluated four cytokinins (2iP, tZ, BAP, KIN) two different osmotic media, MS-N (3% sucrose, 3 g L?1 Ge...

Lemon balm (Melissa officinalis L.) is a plant of the family Lamiaceae. The present study aimed to determine chemical composition lemon essential oil grown in Northeastern Bulgaria, perform comparative analysis its antimicrobial activity with that citral, and surface tension properties. main compounds (concentration above 3%) were: ß-caryophyllene (20.45%), geranial (19.74%), neral (15.81%), ge...

Chemical composition of the essential oils (EO) Pelargonium graveolens, Leptospermum petersonii and Cymbopogon martinii var. motia, absolute Rosa centifolia their bioactivity were examined. Major compounds in P. graveolens EO monoterpene alcohols citronellol, geraniol linalool; L. aldehydes geranial, neral citronellal; C. martiniii motia alcohol ester geranyl acetate, while R. aromatic 2-phenyl...

The essential oils associated with the flowers of Tithonia diversifolia (Hemsl.) A. Gray were extracted and characterized via hydrodistillation and Gas Chromatography. Hydrodistillation was done in an all-glass Clevenger-type apparatus. The extracts from the hydrodistillation were subjected to gas chromatography where the components of the essential oils were separated based on their molecular ...

The conifer Picea abies (Norway spruce) defends itself against herbivores and pathogens with a terpenoid-based oleoresin composed chiefly of monoterpenes (C(10)) and diterpenes (C(20)). An important group of enzymes in oleoresin biosynthesis are the short-chain isoprenyl diphosphate synthases that produce geranyl diphosphate (C(10)), farnesyl diphosphate (C(15)), and geranylgeranyl diphosphate ...

The biological activity of essential oil extracted from coriander, Coriandrum sativum L. (Apiaceae), seeds against adults of Tribolium confusum Duval (Coleoptera: Tenebrionidae) and Callosobruchus maculatus F. (Coleoptera: Bruchidae) was investigated in a series of laboratory experiments. Fumigant toxicity was assessed at 27 ± 1°C and 65 ± 5% R.H., in dark condition. Dry seeds of the plant were...