scholarly journals Enhancement of anti-skin inflammatory activities of Scutellaria baicalensis using an alkaline reduced water extraction process

2014 ◽  
Vol 23 (6) ◽  
pp. 1859-1866 ◽  
Author(s):  
Wooseok Choi ◽  
Hee-Souk Kwon ◽  
Hyeon Yong Lee
Keyword(s):  
Extraction Process ◽  
Scutellaria Baicalensis ◽  
Water Extraction ◽  
Reduced Water

scholarly journals Subcritical Water Extraction of Chestnut Bark and Optimization of Process Parameters

Molecules ◽  
2020 ◽  
Vol 25 (12) ◽  
pp. 2774 ◽  
Author(s):  
Tanja Gagić ◽  
Željko Knez ◽  
Mojca Škerget
Keyword(s):  
Process Parameters ◽  
Subcritical Water ◽  
Extraction Process ◽  
Extraction Yield ◽  
Water Extraction ◽  
Bark Extract ◽  
Total Phenol Content ◽  
Process Conditions ◽  
Subcritical Water Extraction ◽  
Influence Of Process Parameters

The aim of the work was the optimization of the subcritical water extraction process of chestnut bark using Box–Behnken response surface methodology. The influence of process parameters, such as temperature, extraction time and solvent-solid ratio, on extraction yield, yield of the main compounds, total phenol content, total tannin content and antioxidant activity has been investigated. The identified compounds were ellagic and gallic acids, ellagitannins (vescalagin, castalagin, 1-o-galloyl castalagin, vescalin and castalin), sugars (maltose, glucose, fructose and arabinose) and sugar derivatives (5-HMF, furfural and levulinic acid). Finally, the optimal process conditions for obtaining the bark extract highly rich in ellagic acid and with satisfactory levels of total phenols and total tannins have been determined.

scholarly journals The Effect of Acids on Alkaloid Yield in Pressurized Water Extraction of Narcissus Pseudonarcissus

2021 ◽  
Vol 53 (6) ◽  
pp. 210608
Author(s):  
Orchidea Rachmaniah ◽  
Jaap Van Spronsen ◽  
Robert Verpoorte ◽  
Geert Jan Witkamp
Keyword(s):  
Water Extract ◽  
Soxhlet Extraction ◽  
Extraction Process ◽  
High Viscosity ◽  
Water Soluble ◽  
Water Extraction ◽  
High Yield ◽  
Pressurized Water ◽  
Narcissus Pseudonarcissus ◽  
Pressurized Water Extraction

Pressurized water (PW) extraction of galanthamine from Narcissus pseudonarcissus bulbs was performed. The obtained yield was compared with the yield from conventional acidified water extraction and methanolic Soxhlet extraction. Both PW and conventional acidified water extraction were followed by a subsequent purification step for the alkaloids. The PW extraction (70 °C, 150 bar, 45 min) yielded as much galanthamine as methanolic-Soxhlet extraction (ca. 3.50 mg/g). Meanwhile, acid-base extraction with 1% of HBr (v/v) at 65 °C for 3 h gave a lower yield (ca. 2.65 mg/g). A higher PW temperature did not significantly increase the galanthamine yield. Pressure increase is not necessary since more water-soluble compounds such as proteins and polysaccharides are co-extracted, resulting in high viscosity of the water extract solution, which hampers the filtration process. Hence, the acidity of the solution is highly important both in the case of PW extraction and acidified water extraction. Besides galanthamine, the total alkaloid profile following Narcissus alkaloids was also obtained. Lycoramine, O-methyloduline, norgalanthamine, epi-norgalanthamine, narwedine, oduline, haemanthamine, O-methyllycorenine, and a haemanthamine derivate were identified. Although a high yield was obtained from PW extraction, the further purification needs to be improved to obtain an economically feasible industrial extraction process.

scholarly journals Yield and Extraction Rate Analysis of Phytochemical Compounds from Eucheuma cottonii, Ganoderma lucidum, and Gracilaria sp. using Subcritical Water Extraction

2021 ◽  
Vol 21 (1) ◽  
pp. 27
Author(s):  
Fesa Putra Kristanto ◽  
Siti Machmudah ◽  
Sugeng Winardi ◽  
Wahyudiono Wahyudiono ◽  
Motonobu Goto
Keyword(s):  
Ganoderma Lucidum ◽  
Subcritical Water ◽  
Extraction Process ◽  
Extraction Rate ◽  
Water Extraction ◽  
Kinetics Model ◽  
Optimum Temperature ◽  
Subcritical Water Extraction ◽  
Phytochemical Compounds ◽  
Eucheuma Cottonii

Eucheuma cottonii (E. cottonii), Ganoderma lucidum (G. lucidum), and Gracilaria sp. are plants that contain high phytochemicals, such as flavonoids, polyphenols, saponins, and tannins. In this work, the phytochemicals were obtained using the subcritical water extraction (SWE) process. The SWE method uses water as a solvent in subcritical conditions. Therefore, the SWE process is an environmentally friendly process for extraction. In order to run the SWE process optimally, measurement of the extraction rate of SWE is needed. Calculation of the extraction rate of SWE process used first and second-order models according to Lagergren equation. SWE process was started by setting temperatures from 140 to 180oC at a pressure of 7 MPa and solvent flow rate of 1 ml/min. Before starting the extraction, the raw material was loaded into the extractor. The raw materials used were E. cottonii, G. lucidum, and Gracilaria sp. The extraction process was carried out for 3 hours, and the product was collected every 30 minutes. The collected product was put into a sample bottle and dried using a freeze dryer. After that, the products obtained were balanced by an analytical scale. Based on the result, the optimum temperature for the SWE process was 180oC for E. cottonii and G. lucidum and 160oC for Gracilaria sp. The yields of the SWE process under the optimum temperature were 85.37%, 58.42%, and 75.73% for E. cottonii, G. lucidum, and Gracilaria sp, respectively. The extract contained phytochemical compounds detected by high-performance liquid chromatography analysis. The kinetics model of extraction rate for all variables exhibited a second-order kinetics model that indicated that the extraction process was influenced by more than one factor.

Design and modeling of hot compressed water extraction process for palm oil

2015 ◽  
Author(s):  
Mohd Sharizan Md Sarip ◽  
Yoshiyuki Yamashita ◽  
Noor Azian Morad ◽  
Muhamad Nur Iman Ahmad Razali
Keyword(s):  
Palm Oil ◽  
Extraction Process ◽  
Water Extraction ◽  
Hot Compressed Water

Study on Water Extraction Technology of Litsea cubeba Essential Oil from the Seed of Litsea cubeba (Lour.) Pers. Assisted by Microwave and Ultrasonic

2010 ◽  
Vol 156-157 ◽  
pp. 1113-1116
Author(s):  
Guo En Yang ◽  
Xiang Zhou Li ◽  
Min Zhang ◽  
Ying He Li
Keyword(s):  
Essential Oil ◽  
Microwave Power ◽  
Extraction Process ◽  
Water Extraction ◽  
Average Yield ◽  
Liquid Ratio ◽  
Extraction Technology ◽  
Litsea Cubeba ◽  
Optimal Technology ◽  
Solid Liquid

Evaluated with the yield of litsea cubeba essential oil, water extraction technology of essential oil from the seed of Litsea Cubeba (Lour.) Pers. assisted by microwave and ultrasonic is studied for the first time in this paper. The optimal water extraction technology of litsea cubeba essential oil assisted by pure microwave is as follows: extracting time 40 minutes, microwave power 650 W, solid-liquid ratio 1:4 (g/mL). Average yield of litsea cubeba essential oil is up to 10.287% (g/g) under the above optimal technology. The optimal water extraction technology of litsea cubeba essential oil assisted by microwave together with ultrasonic is as follows: extracting time 8 minutes, microwave power 600 W, solid-liquid ratio 1:7 (g/mL), extracting temperature 85 . Average yield of litsea cubeba essential oil is up to 14.188% under the above optimal technology. Microwave and ultrasonic can effectively enhance the extraction process of litsea cubeba essential oil.

Sign in / Sign up

Export Citation Format

Share Document