objective: in order to use natural compounds in controlling plant pests and diseases, many researchers in recent years have studied the antifungal effects of essential oils and plant extracts.  the purpose of this study was to investigate the chemical composition and antifungal effects of echium khuzestanium and marubbium anisodan extracts. methods: after extraction and preparation of different...

background & aim: turmeric, scientifically named (curcuma longa l.), a member of ginger (zingiberaceae) family, is a perennial plant, with pharmaceutical properties and with a rhizome. this plant has many medicinal characteristics including anti-cancer, anti-bacteria and anti-hepatitis properties. experimental: to study the effects of gibberellic acid and salicylic acid on leaf, the rhizome...

background & aim:jasmonic acid (ja) is regarded as endogenous regulators that play important roles in regulating stress responses, plant growth and development.effect of foliar application of ja on the essential oil and oil chemical components of hyssop (hyssopus officinalis l.) were investigated. experimental:  this study conducted in a crd with three replications and in experimental green...

background & aim: the use of herbs in traditional medicine to treatment of diseases and other purposes in the food industry and cosmetics has since long been considered.  considering that heracleum lasiopetalum, thymus carmanicus and myrtus communis have many health benefits therefore this research were performed to investigate the chemical composition of essential oils from these plants. e...

A gas chromatograph (GC) coupled with a mass spectrometer (MS) forms a powerful tool for high quality quantitative and qualitative analysis. However, GC/MS analysis of complex mixtures such as essential oils often is a time-consuming task due to limitations in techniques and instrumentation. Faster analyses of these mixtures are possible by coupling the 5973A mass selective detector (MSD) with ...

Gas chromatography (GC) is used widely in applications involving food analysis. Typical applications pertain to the quantitative and/or qualitative analysis of food composition, natural products, food additives, flavor and aroma components, a variety of transformation products, and contaminants, such as pesticides, fumigants, environmental pollutants, natural toxins, veterinary drugs, and packa...

Smoking marijuana during pregnancy can cause health problems in the neonate. The detection of exposure can guide treatment to meet the short- and long-term medical and social needs. Umbilical cord tissue was analyzed for 11-nor-delta-9-carboxy-tetrahydrocannabinol (THC-COOH) by gas chromatography-mass spectrometry (GC-MS), and compared with ultra-sensitive enzyme-linked immunosorbent assay (ELI...

A methanol extract of lyophilized Brickellia cavanillesii was quantitatively analyzed using gas chromatographic (GC) techniques. The chromatographic methods employed were (i) GC-flame ionization detector (GC-FID), (ii) GC-mass spectrometry (GC-MS), and (iii) purge and trap GC-MS (P&T GC-MS). Thirteen compounds were identified with a quality match of 90% and above using GC-MS. The compounds were...