BACKGROUND The leaves of Ocimum basilicum L. (basil) are used in traditional cuisine as spices; its essential oil has found a wide application in perfumery, dental products as well as antifungal agents. AIM To assess the chemical composition as well as the in vitro antifungal activity of O. basilicum L. essential oil against Aspergillus flavus fungal growth and aflatoxin B1 production. MATE...

Pine oleoresin is a major source of terpenes, consisting of turpentine (mono- and sesquiterpenes) and rosin (diterpenes) fractions. Higher oleoresin yields are of economic interest, since oleoresin derivatives make up a valuable source of materials for chemical industries. Oleoresin can be extracted from living trees, often by the bark streak method, in which bark removal is done periodically, ...

The chemical composition of the essential oils of flower at the pre-flowering, full-flowering and post-flowering stage of A. annua was analyzed by GC and GC/MS and sixty-two components were identified. The main compounds in the pre-flowering oil were β-myrcene (37.71%), 1, 8-cineole (16.11%) and camphor (14.97%). The full-flowering oil contained predominantly caryophyllene (19.4%), germacrene D...

Citrus aroma and flavor, chief traits of fruit quality, are derived from their high content in essential oils of most plant tissues, including leaves, stems, flowers, and fruits. Accumulated in secretory cavities, most components of these oils are volatile terpenes. They contribute to defense against herbivores and pathogens, and perhaps also protect tissues against abiotic stress. In spite of ...

sinusoidal. Relaxation oscillator generates the triangular, saw tooth and other non-sinusoidal waveforms. Sinusoidal oscillators consist of amplifiers. 2409Sinusoidal and Non-sinusoidal Oscillators 2409 (e) Heterodyne or beat-frequency oscillator (BFO). The active devices (bipolars, FETs or unijunction. To generate the AC voltage, the oscillator circuit will receive the energy from a DC The Osc...

Producers in the Western Cape province of South Africa are looking towards a push-pull strategy to reduce oviposition damage plums by western flower thrips (WFT). White clover, Trifolium repens L., favoured host plant WFT, was investigated as possible trap crop provide “pull” element. The attractiveness collected volatiles white clover flowers and unopened (balloon stage) open plum (Prunus sali...

To better understand the cold-induced regulation of scald-like disorders in pears and specific roles played by ethylene ?-farnesene, three pear cultivars with different patterns production chilling requirement were used this study. Fruit treated 1-MCP (ethylene inhibitor) Lovastatin (?-farnesene stored at -0.5 °C 90 % RH during 6 months. Changes targeted metabolites, enzymes genes monitored per...

The root-knot nematode (Meloidogyne incognita) is a plant pathogen that causes significant economic damage to important food crops. nematicidal and insecticidal effects of the essential oil extract root stem different species Eupatorium have been studied in several countries. We investigated impact stems leaves E. adenophorum on second-stage juveniles (J2s) M. incognita. Nematode mortality decr...

the roots and rhizomes of tanacetum parthenium (l.) schulz. bip. (asteraceae), have been used in iranian traditional medicine under the name of aqhovan, as digestive and stomachic tonic. composition of the essential oil, which was obtained from the root of t. parthenium collected from karaj, was determined by gas chromatography, combined gc/ms and gc/ir. in total, 20 components (92% of essentia...