Influence of Pretreatment on Adhesion Quality of Supercritical-fluid-deposited Cu Film on Si

Introduction: The effects of the grinding procedure on the supercritical fluid extraction (SFE) yields of eugenol, β-caryophyllene, α-humulene, and eugenyl acetate from clove are discussed in detail in this paper. Methods: For this purpose, five grinding procedures were employed: 1) continuous 1-min grinding, 2) continuous 2-min grinding, 3) two 1-min grinding periods with 6-min stop in between 4) continuous 4-min grinding, and 5) four 1-min grinding periods with 6-min stops in between. After that, the extractor was filled with 12 g of milled clove obtained using one of the grinding procedures while the other SFE parameters were kept constant (pressure of 150 bar, temperature of 40 °C, supercritical CO2 flow rate of 1.03×10−4 kg/s, static time of 20 min, and dynamic extraction time of 15 min). Then, the composition of the extract was evaluated by gas chromatography (GC). Conclusion: It was found that the grinding procedure has considerable effects on the recoveries of eugenol, β-caryophyllene, α-humulene, and eugenyl acetate from clove, and employing four 1-min grinding periods with 6-min stops in between as the grinding procedure gave the highest content of the aforementioned components in the extract.

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Yield and composition of supercritical fluid extracts of different Lamiaceae herbs: Satureja hortensis L., Ocimum basilicum L. and Melissa officinalis L.

International Journal of Horticultural Science ◽

10.31421/ijhs/14/4/1538 ◽

2008 ◽

Vol 14 (4) ◽

Author(s):

G. Kutta ◽

Zs. Pluhár ◽

Sz. Sárosi ◽

A. L. Fülöp ◽

G. Sándor

Keyword(s):

Essential Oil ◽

Supercritical Fluid ◽

Extraction Procedure ◽

Ocimum Basilicum ◽

Melissa Officinalis ◽

Plant Materials ◽

Satureja Hortensis ◽

Yield And Quality ◽

Carbon Dioxide Extraction

In our work the effectiveness of supercritical carbon dioxide extraction was studied on volatile and nonvolatile components of Lamiaceae herbs. The aim of our investigations was to determine the optimal extraction parameters yielding high amount of volatiles and nonvolatiles in a desirable composition. As plant materials, dried and powdered cude drugs of Satureja hortensis, Ocimum basilicum and Melissa officinalis were chosen. Pressure (8-50 MPa), temperature (35-60 °C), time (5-60 min) and the ratio of modifier (5-50% methanol) of extraction were regulated. Results obtained by supercritical fluid extraction (SFE) were compared to that of the conventional extraction procedure, hydrodistillation (HD). In the case of Satureja hortensis, Ocimum basilicum and Melissa officinalis extract yield of SFE was comparable to the essential oil amount obtained by hydrodistillation from the same drug. Essential oil rich extracts were analysed by GC-FID, while extracts rich in nonvolatile compounds were analysed by HPLC. We have found that yield and quality of SFE extracts highly depend on the conditions of extraction.

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Determination of essential oil content in caraway (Carum carvi L.) species by means of supercritical fluid extraction

Plant Soil and Environment ◽

10.17221/4125-pse ◽

2011 ◽

Vol 49 (No. 6) ◽

pp. 277-282 ◽

Cited By ~ 17

Author(s):

J. Sedláková ◽

B. Kocourková ◽

L. Lojková ◽

V. Kubáň

Keyword(s):

Essential Oil ◽

Essential Oils ◽

Supercritical Fluid Extraction ◽

Supercritical Fluid ◽

Small Samples ◽

Fluid Extraction ◽

Carum Carvi ◽

Main Portion

Dependently on planting conditions caraway fruits contain 1–9% of essential oils consisting of about 30 compounds. Carvone and limonene account for the main portion, about 95%. To evaluate the quality of various registered caraway (Carum carvi L.) cultivars (Kepron, Prochan and Rekord) planted during 1998–2000, regarding the effect of sample grinding and preparation, plant treatment and time of harvest, the amounts of essential oil and the carvone/limonene ratio were determined. Both whole and ground caraway seeds were extracted. As obvious from the results, SFE is not suitable for the determination of essential oils in whole seeds since the results are lower in comparison with those of ground caraway. The way of grinding was also examined. Of the three mills used, a splintery mill VIPO seemed to be the most suitable. Further, the amount of essential oil was studied in caraway gathered at the beginning of maturation (sample A) and at full ripeness (sample B) of caraway seeds. It was found that the samples gathered at full ripeness (samples B) had more essential oil. It was also concluded that the use of the regulator Roundup Bioaktiv during caraway maturation to unite the ripening of achenes in the main umbel and the first-order umbels, and the use of fungicides (Alert S and Prelude 10) affected positively the amount of essential oil in caraway. Possibilities of SFE application for the essential oil determination in small samples gathered during breeding were investigated. The results were used as a one of the criteria during breeding. Classical way of the essential oil determination does not allow this option. An alternative method for the isolation and determination of essential oils – supercritical fluid extraction (SFE) – was investigated in this study.

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Comparative Study on the Step Coverage Quality of Cu Film by SCFD and CVD

ECS Transactions ◽

10.1149/1.3207725 ◽

2019 ◽

Vol 25 (8) ◽

pp. 1199-1206

Author(s):

Yukihiro Shimogaki ◽

Takeshi Momose ◽

Masakazu Sugiyama

Keyword(s):

Comparative Study ◽

Step Coverage ◽

Cu Film ◽

Coverage Quality

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Effectively improve the quality of camellia oil by the combination of supercritical fluid extraction and molecular distillation (SFE-MD)

LWT ◽

10.1016/j.lwt.2019.04.075 ◽

2019 ◽

Vol 110 ◽

pp. 175-181 ◽

Cited By ~ 7

Author(s):

Dan Zhou ◽

Qinlong Shi ◽

Jiangbo Pan ◽

Min Liu ◽

Yi Long ◽

...

Keyword(s):

Supercritical Fluid Extraction ◽

Supercritical Fluid ◽

Molecular Distillation ◽

Fluid Extraction ◽

Camellia Oil

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Quality of Cosmetic Argan Oil Extracted by Supercritical Fluid Extraction fromArgania spinosaL.

Journal of Chemistry ◽

10.1155/2013/408194 ◽

2013 ◽

Vol 2013 ◽

pp. 1-9 ◽

Cited By ~ 5

Author(s):

Chouaa Taribak ◽

Lourdes Casas ◽

Casimiro Mantell ◽

Zoubaida Elfadli ◽

Rédouane E. Metni ◽

...

Keyword(s):

Fatty Acids ◽

Antioxidant Capacity ◽

Supercritical Fluid ◽

Physicochemical Parameters ◽

Total Tocopherol ◽

Oil Processing ◽

Argan Oil ◽

Iodine Values ◽

Pistachio Oil

Argan oil has been extracted using supercritical CO2. The influence of the variables pressure (100, 200, 300, and 400 bar) and temperature (35, 45, 55°C) was investigated. The best extraction yields were achieved at a temperature of 45°C and a pressure of 400 bar. The argan oil extracts were characterized in terms of acid, peroxide and iodine values, total tocopherol, carotene, and fatty acids content. Significant compositional differences were not observed between the oil samples obtained using different pressures and temperatures. The antioxidant capacity of the argan oil samples was high in comparison to those of walnut, almond, hazelnut, and peanut oils and comparable to that of pistachio oil. The physicochemical parameters of the extracted oils obtained by SFE, Soxhlet, and traditional methods are comparable. The technique used for oil processing does not therefore markedly alter the quality of argan oil.

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