scholarly journals The effect of the operation conditions and the extraction techniques on the yield, kinetics and composition of methanol extracts of Hieracium pilosella L.

2009 ◽  
Vol 63 (2) ◽  
pp. 79-86 ◽  
Author(s):  
Ljiljana Stanojevic ◽  
Mihajlo Stankovic ◽  
Milorad Cakic ◽  
Vesna Nikolic ◽  
Ljubisa Nikolic ◽  
...  
Keyword(s):  
Chlorogenic Acid ◽  
Soxhlet Extraction ◽  
Hplc Method ◽  
Bioactive Components ◽  
Extraction Techniques ◽  
Extraction Kinetics ◽  
Operation Conditions ◽  
Hieracium Pilosella ◽  
Total Extractive ◽  
Kinetics Of

The optimal operational extraction conditions were determined by investigating the influence of the methanol concentration, solvomodule and temperature of the maceration extraction on the yield and kinetics of total extractive matter, chlorogenic acid, umbelliferone and apigenin-7-O-glucoside from Hieracium pilosella L. Based on the results of Soxhlet and Tillepape extraction kinetics investigations of the total extractive matter and the components under the optimal maceration operation conditions it was found that the highest yields of the extractive matter and investigated bioactive components extracted from the dry plant material were obtained by using the Soxhlet extraction method. The contents of chlorogenic acid, umbelliferone and apigenin-7-O-glucoside in the extracts were determined by HPLC method. Chlorogenic acid is the component with the highest share in all the extracts.

scholarly journals The influence of the operation conditions and the extraction techniques on the yield, kinetics and the composition of ethanol extracts of Hieracium pilosella L.

2007 ◽  
Vol 13 (4) ◽  
pp. 199-204 ◽  
Author(s):  
Ljiljana Stanojevic ◽  
Mihajlo Stankovic ◽  
Ljubisa Nikolic ◽  
Vesna Nikolic
Keyword(s):  
Chlorogenic Acid ◽  
Plant Material ◽  
Soxhlet Extraction ◽  
Hplc Method ◽  
Matter Content ◽  
Operation Conditions ◽  
Hieracium Pilosella ◽  
Ethanol Extracts ◽  
High Level ◽  
Total Extraction

The optimal operational extraction conditions (50 % v/v ethanol, solvomodule l:15 m/v, temperature: the solvent boiling temperature) were determined by investigating the influence of the ethanol concentration (30 - 95 % v/v), solvomodule (1:10 - 1:25 m/v) and the temperature of the maceration extraction on the yield and kinetics of total extraction matter, chlorogenic acid, umbelliferone and apigenin-7-O-glucoside from Hieracium pilosella L. Based on the results of Soxhlet and Tillepape extraction kinetics, the investigations of the total extraction matter and the components under the optimal maceration operation conditions it was found that the highest yield of the extraction matter from the dry plant material (43.0 g/100 g of the dry plant material, i.e. 97.7% of the extractive matter content in the plant material), chlorogenic acid (20.30 g/100 g of dry plant material, i.e. 94 % of the chlorogenic acid content in the plant material), umbelliferone (0.30 g/100 g of the dry plant material, i.e. 96.7% of umbelliferone content in the plant material, and apigenin-7-O-glucoside (0.24 g/100 g of the dry plant material, i.e. 96 % of the apigenin-7-O-glucoside content in the plant material) was obtained by using a Soxhlet extraction method. The contents of chlorogenic acid, umbelliferone and apigenin-7-O-glucoside in the extracts were determined by HPLC method. Chlorogenic acid is the component with the highest share in all the extracts. (It was found) The high content of chlorogenic acid in the investigated plant material (21.60 %) and the high level of its extraction from the plant material (75-94**%) were found under the defined optimal maceration conditions, Soxhlet and Tillepape extraction.

scholarly journals Antioxidant Capacity and Total Phenolic and Flavonoid Contents of Methanolic Extracts of Urtica dioica L. by Different Extraction Techniques

2020 ◽  
pp. 207-214
Author(s):  
Sabina Begić ◽  
Emir Horozić ◽  
Hurija Alibašić ◽  
Edita Bjelić ◽  
Salih Seferović ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Antioxidant Capacity ◽  
Soxhlet Extraction ◽  
Biologically Active ◽  
Total Phenolic ◽  
Bioactive Components ◽  
Extraction Techniques ◽  
Active Components ◽  
Methanolic Extracts ◽  
High Antioxidant Activity

In this study, the efficacy of different extraction techniques (maceration, ultrasound-assisted and Soxhlet extraction) on the content of biologically active components in extracts from fresh and dried nettle leaves, and their antioxidant activity were analyzed. Methanol was used as the solvent. Total phenolic content and antioxidant capacity were determined by Folin-Ciocalteu, DPPH and FRAP methods, respectively. High content of total phenolic compounds and high antioxidant activity were recorded in extracts of dried nettle. Extracts obtained from fresh nettle samples showed significantly lower content of analyzed bioactive components and lower antioxidant activity. In the case of all extracts, Soxhlet extraction proved to be the most efficient, and maceration the least efficient extraction technique for isolation of bioactive components from nettle leaves.

scholarly journals Anti-diabetes Constituents in Leaves of Smallanthus sonchifolius

2010 ◽  
Vol 5 (1) ◽  
pp. 1934578X1000500 ◽  
Author(s):  
Xiang Zheng ◽  
He Fan ◽  
Kang Ting-Guo ◽  
Dou De-Qiang ◽  
Gai Kuo ◽  
...  
Keyword(s):  
Quality Control ◽  
Chlorogenic Acid ◽  
Caffeic Acid ◽  
Analytical Method ◽  
Inhibitory Effect ◽  
Hplc Method ◽  
Smallanthus Sonchifolius ◽  
Rp Hplc

The inhibitory effect of smallanthaditerpenic acids A, B, C and D previously isolated from leaves of Smallanthus sonchifolius (yacon) on α-glucosidase were examined and their IC50 were determined to be 0.48 mg/mL, 0.59 mg/mL, 1.00 mg/mL, and 1.17 mg/mL respectively. In addition, a rapid, reliable RP-HPLC method for the analysis of chlorogenic acid, caffeic acid, and smallanthaditerpenic acids A and C in yacon leaves was established, and the variation in their contents in leaves from plants cultivated in different places and collected at different times of the year were compared. The established analytical method for determining smallanthaditerpenic acids A and C, chlorogenic acid and caffeic acid presented good results and could be used as a method for the quality control of S. sonchifolius leaves.

Extraction Kinetics of Organic Acids with Tri-n-octylphosphine Oxide

1996 ◽  
Vol 67 (3) ◽  
pp. 260-264 ◽  
Author(s):  
Michiaki Matsumoto ◽  
Shinji Uenoyama ◽  
Tadashi Hano ◽  
Makato Hirata ◽  
Shigenobu Miura
Keyword(s):  
Organic Acids ◽  
Extraction Kinetics ◽  
Kinetics Of

scholarly journals Aqueous extraction kinetics of soluble solids, phenolics and flavonoids from sage (Salvia fruticosa Miller) leaves

2014 ◽  
Vol 52 (5) ◽  
pp. 2797-2805 ◽  
Author(s):  
Mehmet Torun ◽  
Cuneyt Dincer ◽  
Ayhan Topuz ◽  
Hilal Sahin–Nadeem ◽  
Feramuz Ozdemir
Keyword(s):  
Aqueous Extraction ◽  
Soluble Solids ◽  
Extraction Kinetics ◽  
Salvia Fruticosa ◽  
Kinetics Of

Extraction Kinetics of Gallium with 5-Chloro-8-Quinolinol

2004 ◽  
Vol 37 (3) ◽  
pp. 465-468 ◽  
Author(s):  
Kazuo Kondo ◽  
Toyo Okubo ◽  
Michiaki Matsumoto
Keyword(s):  
Extraction Kinetics ◽  
Kinetics Of
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