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 ...

Demodex is a type of permanent obligatory parasite, which can be found on the human body surface. Currently, drugs targeting Demodex usually result in adverse effects and have a poor therapeutic effect. Thus, the aim of the present study was to investigate the use of Chinese crude medicine volatile oils for targeting and inhibiting Demodex in vitro. The volatile oils of six Chinese crude medici...

background: herbal essential oils (eos) are natural, volatile, and complex compounds that are defined by a strong odor. this study was conducted to investigate and compare antioxidant and antifungal properties of eo extracted from flowers and leaves of origanum vulgare ssp. gracile from iran. methods: eos of leaves and flowers of o. vulgare ssp. gracile were extracted using a modified clevenger...

background: this study aimed at investigation of the chemical composition, antimicrobial activity, and antioxidant properties of clove, cumin, origanum, and anise essential oils (eos). methods: chemical compositions of the eos were identified using gas chromatography/mass spectrometry (gc/ms). the antibacterial activities of eos against four important food-borne bacteria were assessed by disc d...

background development of antibiotic resistance among pathogenic bacteria motivates the researchers to search for newer antimicrobial agents. objectives in the present study, antibacterial effects of cuminum cyminum linn. essential oil against multidrug resistant (mdr) escherichia coli strains isolated from urinary tract infections were studied, using microdilution method. materials and methods...

This study investigates the seasonal variation of three species of Leptospermum (Myrtaceae) grown in Brazil. The chemical composition of the volatile oils of L. flavescens and L. petersonii did not show any significant seasonal variation in the major components, while for Leptospermum madidum subsp. sativum the levels of major constituents of the volatile oils varied with the harvest season. Ma...

A study was undertaken to explore the effect of volatile oils from Eucalyptus citriodora and its major constituent citronellal against two well-known rice pathogens, Rhizoctonia solani and Helminthosporium oryzae. The radial growth and dry weight of both the test fungi were drastically reduced in response to the volatile oils. A complete inhibition of R. solani and H. oryzae was observed at 10 ...

background pycnocycla spinosa decne. ex boiss is an aromatic plant which showed relaxant effects on isolated ileum contractions and antidiarrheal activity. thirty four components have been extracted from p. spinosa essential oil, of which several major constituents were found to show seasonal variation. objectives the aim of this work is to evaluate the diurnal variation of its oil constituents...

background: mahyaveh is an iranian salted-fermented fish sauce which due to its high amount of protein has risk of histamine production. this study was carried out to determine effect of zataria multiflora essential oil (eo) on histamine production in mahyaveh. methods: dried anchovies (stolephorus sp.), refined-salt and mustard seed (brassica juncea) were purchased from the local market in ban...

background: fillet is a popular part of chicken carcass which its high perishability is an economic problem. the present research was designed to study the microbial, chemical, and sensorial properties of chicken fillets coated by gelatin-carboxymethyl cellulose (cmc) film containing essential oil (eo) of bene (pistacia atlantica). methods: the chicken fillets were coated by gelatin-cmc film co...