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At least 109 records · Page 6Linked to original sources
PubMed2000

[Studies on chemical components of the volatile oil from the leaves of Hypericum perforatum].

OBJECTIVE: To determine the volatile oil of the leaves from Hypericum perforatum L.. METHOD: The essential oil was obtained by simultaneous distillation and solvent extraction. The chemical components were seperated and identified by GC-MS. The relative contents in the volatile oil were determined by area nomalization. RESULTS: 54 chemical constituents were separated and identified representing 92.32% of the total contents. CONCLUSION: Sesquiterpenes are major chemical constituents in the oil from the leaves of Hypericum perforatum L.. They are very different from those of the essential oil from the same species from the other country.

Gas Chromatography-Mass Spectrometry↗
PubMed2000

[Study on the technological process of including volatile oil of Baizhu with beta-cyclodextrin].

The volatile oil of Baizhu was included with beta-CD. The factors affecting the formation of the inclusion compounds were researched by L9(3(4)) orthogonal test. The ratio of the oil in inclusion compounds and recovery of inclusion compounds were used as criteria in the test. The best conditions for inclusion were A2B3C1, that is, the compounds should be formed in the aqueous solution containing beta-CD and oil with a raio of 8:1, aqua destillate and beta-CD with a ratio of 4:1 for two hours.

Analysis of Variance↗
PubMed2006

[GC-MS analysis of volatile oil from the ear of Schizonepeta tenifolia Briq].

Volatile oil was extracted from the ear of Schizonepeta tenifollia Briq. by supercritical carbon dioxide extraction and steam distillation, then GC-MS was used to analyse their components and determine the content. There were 41 components identified from products of supercritical carbon dioxide extraction, while 32 from those of steam distillation. The content of the main component, pulegone, was also different in the two extracts. It showed that the two extractions have differences in component and content to a certain extent.

Chromatography, Supercritical Fluid↗
PubMed1980

Antimicrobial activity of volatile oils.

The bacteriostatic and fungistatic activities of 22 volatile oils were evaluated. The results showed that the oils tested varied in their antimicrobial activity. Cinnamon oil showed the highest activity against the tested bacteria and fungi. A comparison was made between the biostatic and biocidal activity of each oil. The results also showed that the bacteriostatic results as obtained by the agar-diffusion and serial dilution methods were not always parallel. The data obtained can be made use of clinically as well as for the preservation of liquid preparations liable to microbial contamination.

Anti-Bacterial Agents↗
PubMed2006

[Study on the process of inclusion volatile oil of Herba Schizonepetae with beta-cyclodextrin from xiao'er ganmaoshu granule].

OBJECTIVE: To study optimum inclusion process condition for volatile oil with beta-cyclodextrin (beta-CD). METHODS: The optimum preparation condition were investigated by orthogonal design. The influence of utilization beta-CD and oil, inclusion temperature and time were studied to determin the utilization ratio of volatile oil and oil-bearing rate. RESULTS: The optimum preparation conditions were established as: volatile oil: beta-CD was 1:10, the inclusion temperature was 60 degrees C and inclusion time was 3h. CONCLUSION: The method is convenient and can he used for mass production.

Analysis of Variance↗
PubMed2003

Solid-phase microextraction in the analysis of virgin olive oil volatile fraction: characterization of virgin olive oils from two distinct geographical areas of northern Italy.

SPME was employed to characterize the volatile profile of virgin olive oils produced in two geographical areas of northern Italy: the region of the Gulf of Trieste and the area near Lake Garda. There are as yet no data on the headspace composition of virgin olive oils from these regions, characterized by particular conditions of growth for Olea europaea. Using the SPME technique coupled to GC-MS and GC-FID, the volatile components of 42 industrially produced virgin olive oil samples were identified and the principal compounds quantitatively analyzed. Significant differences in the proportion of volatile constituents from oils of different varieties and geographical origins were detected. The results suggest that besides the genetic factor, environmental conditions influence the volatile formation.

Chromatography, Gas↗
PubMed1996

Effects of the volatile oil of Nigella sativa seeds on the uterine smooth muscle of rat and guinea pig.

The effects of the volatile oil of Nigella sativa seeds on the uterine smooth muscle of rats and guinea pigs was tested in vitro using isolated uterine horns. The volatile oil of Nigella sativa seeds inhibited the spontaneous movements of rat and guinea pig uterine smooth muscle and also the contractions induced by oxytocin stimulation. These effects were concentration-dependent and reversible by tissue washing. These data suggest that this volatile oil may have some anti-oxytocic potential.

Animals↗
PubMed2002

[Determination of chemical components of volatile oil from Cuminum cyminum L. by gas chromatography-mass spectrometry].

Volatile oil was extracted from Cuminum cyminum L. by using steam distillation. More than sixty peaks were separated and 49 compounds were identified by gas chromatography-mass spectrometry (GC-MS). The relative amounts of the components were determined by area normalization method. Among the 49 compounds identified, there were 16 hydrocarbons and 32 oxygenated compounds. The main compnents were cuminal and safranal (accounting for 32.26% and 24.46% respectively in the components identified). The other nine compounds with contents all over 1%, were monterpenes, sesquiterpenes, aromatic aldehydes and aromatic oxides etc. The other components with relatively small amounts were chiefly terpenes, terpenols, terpenals, terpenones, terpene esters and aromatic compounds. It is good to separate polar and apolar components in the volatile oil from Cuminum cyminum L. on the GC capillary column of moderate polarity.

Cuminum↗
PubMed2004

[Study on liposome preparation technique of Bupleurum chinense volatile oil for injection].

OBJECTIVE: To study the preparation technique of the liposome of Bupleurum chinense volatile oil. METHOD: The composition, entrapment ratio of volatile oil, availability of freeze-drying and the changes of finger prints were studied. RESULT: Entrapment ratio reached 81.9%. After freeze-dried, the remaining ratio of the oil entrapped in the liposome reached 88.6%. CONCLUSION: It is practicable to make B. chinense injection into freeze-dried liposome powder.

Bupleurum↗
PubMed1990

[Effects of processing on volatile oil constituents in nutmeg and on the contents of myristicin].

This paper reports a GC analysis of the volatile oil contained in the nutmeg (Semen Myristicae) prepared by simmering wrapped in flour in hot purified talc, scalding in hot purified talc and stir-frying in smoking wheat bran. The experimental results showed that before and after processing the volatile oil compounds in nutmeg are the same and during processing no known compounds disappeared. The contents of the main volatile oil compounds in nutmeg changed, however, before and after processing, including the amounts of myristicin, one of the toxic compounds in nutmeg. It is suggested that the amounts of myristicin could be decreased notably under certain processing conditions.

Allylbenzene Derivatives↗
PubMed2002

[Study on preparation of beta-cyclodextrin inclusion compound of volatile oil from Aucklandia lappa].

OBJECTIVE: To study optimum inclusion process conditions for volatile oil from Aucklandia lappa. METHODS: The study was carried out with orthogonal design. The process conditions were studied by determining the utilization ratio of volatile oil from Aucklandia lappa, the oil-bearing rate and extract ratio of inclusion compound. RESULTS: The optimum preparation conditions for inclusion were established as: oil: beta-CD was 1:8, the inclusion temperature and time were at 40 degrees C and for 1 h respectively, the utilization ratio of oil is 87.1%. CONCLUSION: The method can be used for production of beta-CD on a large scale.

Drug Stability↗
PubMed2003

[Study on selective isolation of volatile oil in the seed of Fructus foeniculi].

OBJECTIVE: To study the selective isolation of a single chemical component from volatile oil of Fructus foeniculi by inclucion method. METHOD: The host molecule was selected and a single chemical component isolated from volatile oil by the host-guest recognition. RESULT: X-ray single crystal analysis showed that 1,1,6,6-tetraphenylhexa-2, 4-diyne-1, 6-diol could successfully include 4-[1-propenyl] benzaldehyde from volatile oil of Fructus foeniculi. CONCLUSION: The host-guest inclusion technology can be used to isolate a single component selectively from mixture.

Crystallization↗
PubMed2002

[Allelopathic potential of volatile oil from Mikania micrantha].

Mikania micrantha, an exotic plant species, is an important weed in south China. The volatile oil of the weed species had significant biological activities on plants and their pathogens, particularly Pyricularia grisea. The results showed that the seeding growth of 6 plant species decreased obviously when exposed to increasing concentration (200, 400, 800, 1600 mg.L-1) of the volatile oil. The fresh weight of all test plants decreased, and the emergence of all test plants delayed for 1-2 days under soil treatment (2500 g.hm-2). The inhibitory effect of volatile oil of M. micrantha at its medium concentration was the most strong on Pyricularia grisea; secondary on Fusarium oxysporum; but weak on Phytophthora nicotianae. The inhibitory rate was 53.38%, 28.66% and 18.69% for the three plant pathogens, respectively.

Ascomycota↗
PubMedDate not supplied

[Volatile oil of Anethum Graveolens L. as an inhibitor of yeast and lactic acid bacteria].

The antimicrobial activity of 25 volatile oils from aerial parts and seeds of dill (Anethum graveolens L.) of different geographical origin towards yeast Saccharomyces vini and lactic acid bacteria Lactobacterium buchneri was measured by serial dilutions. Volatile oils from mature seeds and green parts of the plants harvested at late vegetation phases showed the highest activity. The geographical origin of plants influenced insignificantly the antimicrobial activity of volatile oil.

Cell Division↗
PubMed1997

Toxicological deteriorations of two volatile oils of Matricaria chamomilla and Clerodendron inerme on the adult house fly Musca domestica L.

The adult stage of the house fly Musca domestica L. was treated topically with the sublethal doses of LD25, LD50 and LD75 of chamomile, Matricaria chamomilla L. flowers and jasmine, Clerodendron inerme G. leaves oils. Various biological activities of adult stage as well as the amino acids of the treated adults ovaries were determined. Amino acids determinations were achieved on newly emerged flies and on the three and four days old flies. The LD50s. of 76 and 84 ug/fly of the two oils were used for Matricaria chamomilla and Clerodendron inerme oil, respectively. Treatment with the two volatile oils induced serious effects on the biology and biotic potential of Musca domestica. Treatment was significantly increased the acidic and the aromatic amino acids during oogenesis. In contrast the quantity of aliphatic amino acids was significantly decreased while the hydroxy amino acids have inconsistent results. The hydroxy amino acids were remarkably increased in the ovaries during three days of development, and then decreased in the fourth day. Moreover, the concentration of basic and the sulfur amino acids were varied with the two treatments and the amino acid was completely disappeared in the ovaries of the treated flies.

Animals↗