Cyperus rotundus L. has been widely distributed in China. In the exploration of Cyperi Rhizoma to pat attention on its geoherbalism is very necessary. The current index of quality control for Cyperi Rhizoma and Cyperus rotundus-volatile oil is the αCyperone contained in the Cyperus rotundus-volatile oil, different processing methods influence the content of their αCyperone. On the basis of the ...

Volatile oil exhibited depressant effect on central nervous system of rats and mice. It blocked CAR in 80% animals and potentiated effects of chlorpromazine hydrochloride on CAR and pentobarbitone induced hypnosis in mice. It exhibited hypothermic and analgesic activities and potentiated morphine induced analgesia considerably. The volatile oil checked tonichind limb extension produced by elect...

Volatile oil from the root bark of Oplopanax horridus is regarded to be responsible for the clinical uses of the title plant as a respiratory stimulant and expectorant. Therefore, a supercritical fluid extraction method was first employed to extract the volatile oil from the roots bark of O. horridus, which was subsequently analyzed by GC/MS. Forty-eight volatile compounds were identified by GC...

The chemical composition of volatile oil obtained from aerial parts of Pavonia odorata were investigated using gas chromatography-mass spectrometry (GC-MS). Its aroma-active compounds were identified using gas chromatography-olfactometry (GC-O) and aroma extraction dilution analysis (AEDA). In order to determine the relative contribution of each compound to the aroma of P. odorata, relative fla...

OBJECTIVE To evaluate the effects of Rhizoma kaempferiae volatile oil on tumor growth and cell cycle of MKN-45 human gastric cancer cells orthotopically transplanted in nude mice. METHODS One hundred and five nude mice orthotopically transplanted with MKN-45 human gastric cancer cells were randomly divided into seven groups: untreated group, normal saline-treated group, dissolvant-treated gro...

Methanogenic degradation of crude oil in subsurface sediments occurs slowly, but without the need for exogenous electron acceptors, is sustained for long periods and has enormous economic and environmental consequences. Here we show that volatile hydrocarbons are inhibitory to methanogenic oil biodegradation by comparing degradation of an artificially weathered crude oil with volatile hydrocarb...

Coleman WM III (1992a) The volatile and semivolatile components of supercritical Suid and methylene chloride extracts of selected tobaccos. Journal of Essential Oil Research 4: 113. Coleman WM III (1992b) Automated purge-and-trapgas chromatography analysis of headspace volatiles from natural products. Journal of Chromatographic Science 30: 159. Coleman WM III (1996) A chromatographic study of t...

This paper deals with the application of steam to enhance the recovery from petroleum reservoirs. We formulate a mathematical and numerical model that simulates coinjection of volatile oil with steam into a porous rock in a one-dimensional setting. We utilize the mathematical theory of conservation laws to validate the numerical simulations. This combined numerical and analytical approach revea...

Page Introduction 1 Methods of extraction 2 Extraction by expression 2 Extraction by solution 2 Extraction with cold solid fats _-_ 3 Extraction with hot liquid fats --3 Extraction with volatile solvents 4 Extraction by steam distillation 6 Design and construction of volatile-oil stills 6 Operation of volatile-oil stills__ 12 Commercial production of volatile oils in the United States^ 15 Oils ...

In this study, Biodiesel -Dimethyl Ether (BDE ) was tested in a 4-cylinder direct-injection diesel engine to investigate the performance and emission characteristics of the engine under five engine loads at the maximum torque .The engine speed was maintained at 1500 rpm. Here the jatropha oil is used as a non edible oil to produce the biodiesel. The dimethyl ether is used as an additive to enha...