background and aims: the achillea genus has a wide distributional range, and the differences in oil composition may be affected by different environmental factors such as plant genetic type, seasonality, and developmental stage. the aim of this research was to determine the chemical combination of the essential oils derived from flowering aerial parts of achillea millefolium, a. biebersteinii a...

This study was conducted on experimental field at Garmsar zone in Iran during 2010 – 2011 in order to Evaluation of medicinal plant valerian (Valeriana officinalis L.) essential oil compositions cultivated at Garmsar zone in Iran. Sowing date was 20 September and planting densitiy was 80000 plant ha. The volatile constituents of the root part of cultivated Valeriana officinalis were isolated by...

Qualitative and quantitative chemical composition, activity against bacteria, yeasts and moulds and antioxidant activity of two variants (HV400 and HV3200) of hydrolates from dried lavender flowers (Lavandula angustifolia) were determined. The main chemical compounds were linalool (39.2% HV400, 29.0% HV3200), α-terpineol (7.1% HV400, 12.7% HV3200), borneol (4.8% HV400, 9.3% HV3200) and terpinen...

In this work, we report for the first time, tungstic acid-catalyzed oxidation of terpene alcohols with hydrogen peroxide. This simple, solid, and commercially available catalyst efficiently promoted conversion borneol, geraniol nerol to camphor epoxide products, respectively. Effects main reaction parameters, such as load, molar ratio oxidant substrate, temperature were investigated. Conversion...

The aim of this work was to study the chemical composition and antioxidant activity essential oils Thymus ciliatus (Desf.) Benth from middle Algeria obtained aerial parts by hydrodistillation using a Clevenger-type apparatus. oil analyzed gas chromatography (GC) coupled with mass spectrometry (GC-MS). capacity values T extracts were determined 2 different complementary assays: free radical scav...

Esters based on mono- and bicyclic terpenoids with glycine have been synthesized via Steglich esterification and characterized by ¹H-NMR, IR, and mass spectral studies. Their analgesic and anti-inflammatory activities were investigated after transdermal delivery on models of formalin, capsaicin, and AITC-induced pain, respectively. Glycine esters of menthol and borneol exhibited higher antinoci...

A new chiral compound was synthesized based on L-borneol. A cholesteric liquid crystal (LC) electrolyte solution was prepared by adding it as a chiral inducer to a nematic LC. A chiral poly(3,4-ethylenedioxythiophene) (PEDOT*, * = asymmetry) film was prepared by electrochemical polymerization in the induced cholesteric LC. The PEDOT* film showed a maximum absorption band due to a π–π* transitio...

Flower fragrance compounds were found to be produced from the precursor solution obtained from flower buds by crude enzyme prepared from the flowers at the opening stage. GC and GC-MS analyses showed the formation of volatile aroma constituents from the precursor solution of Jasminum polyanthum F, Jasminum sambac Ait, and Gardenia jasminoides E, but none in the case of Osmanthus fragrans L. The...

The volatile aroma constituents of Chrysanthemum zawadskii var. latilobum K. were separated by hydro distillation extraction (HDE) method using a Clevenger-type apparatus, and analyzed by gas chromatography-mass spectrometry (GC/MS). The yield of C. zawadskii var. latilobum K. flower essential oil (FEO) was 0.12% (w/w) and the color was light green. Fifty-five volatile chemical components, whic...