The chemical composition of essential oil obtained by steam distillation of dried aerial parts of Phlomis bovei De Noé subsp. bovei collected from Algeria, was analyzed by GC and GC/MS. Seventy five constituents (corresponding to 86.37% of the total weight) were identified. The main components were: germacrene D, beta-caryophyllene, beta-bournonene, thymol and hexahydrofarnesyl acetone. Further...

Traditional hydrodistillation (HD), steam distillation extraction (SD), organic solvent extraction (SE), and microwave assisted hydrodistillation (MWHD) techniques were compared and evaluated for their effectiveness in the isolation of essential oil of Melissa officinalis from Algeria. The microwave assisted hydrodistillation technique was optimized in terms of both delivered power and time dur...

Model predictive control (MPC) is implemented on several distillation columns at the Kårstø gas processing plant, Norway. The paper describes the procedure in the implementation of MPC at a deethanizer using the SEPTIC ∗ MPC tool, including design, estimator development, model development and tuning. For the deethanizer, the variance in the product quality has been reduced with about 50%. The n...

Soil cation-exchange capacity (CEC) is often determined by NH4 saturation, using a 1M solution of NH4C2H3O2 at pH 7. A study was conducted to ascertain whether this determination can be performed by employing a simple diffusion technique previously developed for direct inorganic-N analysis of soils. Values obtained for 10 diverse Illinois surface soils following overnight NH4 saturation were co...

Volatile oil of Psidium guajava leaves obtained by steam distillation was given orally to study its effects on the exudation and proliferative phases of the inflammatory reaction, using technique of carragenin induced paw edema and cotton pellets in male albino rats. The anti inflammatory activity as compared with ketorolac tromethamine. In carragenin induced edemas,. 0.8ml/kg of the volatile o...

The determination of total volatile bases (TVB) is probably the oldest objective chemical method for assessing the spoilage of fishery pro­ ducts. It was proposed about a century ago and was already published as standard method for the inspection of fish in Germany in the first years of this century (KÖNIG, 1910). This simple method is still widely used. A European Union directive on fish hygie...

Lavender (Lavandula angustifolia Mill.) is one of the most widely grown essential oil crops in the world. Commercial extraction of lavender oil is done using steam distillation. The objective of this study was to evaluate the effect of the length of the distillation time (DT) on lavender essential oil yield and composition when extracted from dried flowers. Therefore, the following distillation...

Background and objectives: Phlomis bruguieri Desf. (Lamiaceae) is a perennial herbaceous plant distributed in Iran, Turkey and Iraq. Despite medicinal potentials of this species, the current knowledge on its phytochemical constituents is limited. The aim of the present study was to investigate the phytochemical constituents of the essential oil and various extracts of ...

Syzygium aromaticum L. is an aromatic plant with a significant amount of essential oil (EO), which used in food, medicine, for flavoring, and the fragrance industry. The purpose this study was to comparatively evaluate chemical composition, yield, antioxidant antifungal activities oils extracted by conventional hydro-distillation, steam distillation, emerging superheated distillation methods. I...