نتایج جستجو برای: assisted hydrodistillation
تعداد نتایج: 131704 فیلتر نتایج به سال:
The essential oil from the aerial parts of Salvia sclarea L., growing wild in Tajikistan, were obtained by hydrodistillation and analyzed by gas chromatography – mass spectrometry. A total of 59 compounds were identified representing 94.2% of total oil composition. Major components of the essential oil were linalyl acetate (39.2%), linalool (12.5%), germacrene D (11.4%), α-terpineol (5.5%), ger...
Essential oils from leaves of Cephalotaxus fortunei Hook., Cephalotaxus haningtonia K. Koch., Cephalotaxus sinensis Li. and variety Cephalotaxus harringtonia var. drupacea Koidz. underwent qualitative and quantitative analysis. The content of the oils obtained by hydrodistillation in the investigated species was 0.01 - 0.22% v/w. Gas chromatography (GC-MS) with flame ionisation detector (FID) s...
Commercial juices of sweet pomegranates and fresh juices of sour-sweet pomegranates were analysed for organic acids, sugars, antioxidant activity, volatile composition, sensory profile and consumer liking. Organic acids and sugars were analysed by HPLC, while volatiles were extracted using hydrodistillation and analysed by GC-MS and GC-FID. Malic acid was predominant in sweet juices while citri...
The essential oils from the rhizomes of Cyperus rotundus L. collected from two different locations (Empangeni-A and KwaDlangezwa-B; both in the Kwa-Zulu Natal Province of South Africa) were obtained by hydrodistillation and analyzed by capillary GC and GC/MS. Forty-one and 43 components were identified, representing 89.9% and 92.0% of sample A and sample B, respectively. Alpha-cyperone (11.0%),...
Toxic and repellent properties of whole essential oils from four Eupatorium (Asteraceae) species (E. buniifolium Hook. et Arn, E. inulaefolium Kunth, E. arnottii Baker, and E. viscidum Hook. & Arn) were investigated in different concentrations toward Tribolium castaneum Herbst adults. The essential oils were isolated by hydrodistillation techniques from the aerial parts. The analysis was perf...
The volatile components of the flower and fruit oils from Pittosporum tobira (Thunb.) Ait. grown in Iran, obtained through hydrodistillation, were analyzed by GC/MS. Sixteen compounds (representing 90.7% of the oil) and seventeen constituents (representing 89.9% of the oil) were identified in the flower and fruit oils, respectively. While the flower oil contained a-pinene (38.6%), n-nonane (11....
The volatile oil from the crude gum of Kurdica, from Pistacia atlantica Kurdica, was isolated by hydrodistillation and analyzed through a combination of gas chromatography (GC-FID) and gas chromatography/mass spectrometry (GC-MS). The essential oil formed 20% of the weight of the crude gum. The major constituent was α-Pinene. The extracted essential oil was then screened for antimicrobial activ...
The oil obtained by hydrodistillation of aerial parts of Phlomis elliptica Benth. (Labiatae), which is a rare shrub endemic to Iran, was subjected to GC-FID and GC-MS analyses. Thirty-one constituents, making up about 98.4 % of the total composition of oil, were characterized. Monoterpenes, sesquiterpenes and other compounds constituted 13.4 %, 78.9 % and 6.1 % of the essential oil, respectivel...
phenolic compounds, especially those of plant origin, constitute an essential part of the human diet, and are of considerable interest due to their antioxidant properties. in this study, ultrasound-assisted extraction (uae), microwave-assisted extraction (mae), as well as maceration extraction (me) methods were applied for phenolic compounds’ extraction from pistachio green hull. response surfa...
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