scholarly journals Comparison of the extracts obtained from dried Diospyros lotus L. fruits via different extraction techniques in terms of their total phenolic contents and antioxidant activities

2021 ◽  
Author(s):  
Fikret AKDENİZ ◽  
İnan DURSUN ◽  
Kadir TEPEBAŞ ◽  
Hanife ÖZBAY ◽  
Levent KEKEÇ ◽  
...  
Keyword(s):  
Antioxidant Activities ◽  
Total Phenolic ◽  
Extraction Techniques ◽  
Phenolic Contents ◽  
Total Phenolic Contents ◽  
Diospyros Lotus

scholarly journals Comparison of Total Phenolic Contents and Antioxidant Activities of Centella asiatica Extracts Obtained by Three Extraction Techniques

2019 ◽  
Vol 6 (2) ◽  
pp. 42-49
Author(s):  
Wan Nurul Huda Wan Zainal ◽  
FARA RESTINA MUSAHIB ◽  
NABILAH SYAFIQAH ZULKEFLEE
Keyword(s):  
Antioxidant Activity ◽  
Antioxidant Activities ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Centella Asiatica ◽  
Extraction Yield ◽  
Total Phenolic ◽  
Extraction Techniques ◽  
Phenolic Contents ◽  
Total Phenolic Contents

Through different extraction techniques, the potential of Centella asiatica as a natural source of antioxidant was investigated. The C. asiatica aqueous extracts were obtained via infusion, decoction and ultrasonic-assisted extraction (UAE) techniques. The effects of different extraction techniques were studied on the extraction yield, total phenolic contents and antioxidant activity. The total phenolic contents of the extracts and antioxidant activity were examined using the Folin-Ciocalteu’s reagent and 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radical scavenging activity assay, respectively. Results indicated that the UAE exhibited the highest extraction yield, highest total phenolic contents, as well as highest antioxidant activity. The yield of the extracts increased in the order of infusion < decoction < UAE which were 18.2 %, 23.6% and 25.4 %, respectively. All extraction techniques had a significant effect (p <0.05) on the total phenolic contents and antioxidant activity of C. asiatica extracts. The total phenolic contents was ranged from 3.42 ± 0.030 to 8.32 ± 0.105 mg GAE/g dry extract while the antioxidant activity was in the range of 75 to 86 %. This study confirms that C. asiatica has the potential to be a good resource for the future development of natural antioxidant. In addition, extraction via UAE can be an ideal technique to obtain phytochemical-rich extracts from medicinal plants.

SKRINING FITOKIMIA DAN UJI AKTIVITAS ANTIOKSIDAN DAN ANTITUMOR 20 TUMBUHAN OBAT ASAL KABUPATEN MANOKWARI

2008 ◽  
Vol 7 (1) ◽  
Author(s):  
Bimo Budi Santoso
Keyword(s):  
Antioxidant Activity ◽  
Medicinal Plants ◽  
Antitumor Activity ◽  
Traditional Method ◽  
Extraction Efficiency ◽  
Phenolic Content ◽  
Antioxidant Activities ◽  
Total Phenolic ◽  
Phenolic Contents ◽  
Total Phenolic Contents

<strong><em>Flavanoid, steroid, and terpenoid contents of 20 Manokwari medicinal plants were analyzed.  The antioxidant activity, total phenolic contents and antitumor activity of 20 Manokwari medicinal plants were also evaluated. The result shows that 83% positif to flavanoid test, 59% positif to terpenoid test and only 25% positif steroid. Antioxidant activity and total phenolic contents evaluated using Ferric Thiocianate (FTC) and Folin-Ciocalteu methods respectively. Antioxidant activity and total phenolic contents of medicinal plants were extracted by the traditional method, boiling in water and also in 80% methanol. Twenty plants evaluated in both exstracts have significantly varies of antioxidant activities and phenolic contents,  A significant and linier correlation coefficient between the antioxidant activity and the total phenolic content was found in both aqueous (R<sup>2</sup>= 0,77) and methanol (R<sup>2</sup> = 0,85). Antitumor activity was tested using cell maurine P-388 and only 2 of medicinal plants are active to inhibit cell maurine P-388. Comparing extraction efficiency of the two methods, the methanol extracted phenolic compounds more efficiently, and antioxidant activity of the extract was higher.</em></strong>

Evaluation of antioxidant activities and total phenolic contents of typical malting barley varieties

2008 ◽  
Vol 107 (1) ◽  
pp. 296-304 ◽  
Author(s):  
Haifeng Zhao ◽  
Wei Fan ◽  
Jianjun Dong ◽  
Jian Lu ◽  
Jian Chen ◽  
...  
Keyword(s):  
Antioxidant Activities ◽  
Total Phenolic ◽  
Malting Barley ◽  
Phenolic Contents ◽  
Total Phenolic Contents

scholarly journals COMPARATIVE STUDY ON THE ANTIOXIDANT ACTIVITIES OF METHANOLIC AND AQUEOUS EXTRACTS OF TERMINALIA BELLERICA

2019 ◽  
pp. 103-110
Author(s):  
RASNA GUPTA ◽  
RAM LAKHAN SINGH ◽  
ANKIT GUPTA
Keyword(s):  
Antioxidant Activities ◽  
Natural Antioxidants ◽  
Total Phenolic ◽  
Aqueous Extracts ◽  
Fruit Pulp ◽  
Terminalia Bellerica ◽  
Phenolic Contents ◽  
Total Phenolic Contents ◽  
Methanolic Extracts ◽  
Better Than

Objective: The present study was undertaken to investigate the antioxidative activity of fruit pulp, seed and bark of T. bellerica. Methods: Methanol (70%) and water were used for the extraction, and the respective extracts were analyzed for total phenolic contents along with the antioxidant activities through different assays. Results: Amongst the tested extracts, methanolic extracts were found to be better than aqueous with the highest total phenolic contents (TPC). Methanolic fruit pulp showed lower IC50 for free radical (118.7 µg/ml), superoxide anion radical (77.65 µg/ml) and hydroxyl radical (73.76 µg/ml) scavenging activities. Methanolic fruit pulp also showed lower IC50 for lipid peroxidation (115.6 µg/ml) and ferric thiocyanate (184.98 µg/ml) assay than aqueous extracts in comparison to standard quercetin. Further, correlation between TPC and antioxidant studies revealed that phenolics are mainly responsible for antioxidant activity of T. bellerica. Conclusion: The current study suggests that the methanolic extract of T. bellerica could be a potential source of natural antioxidants for food and pharmaceutical companies.

scholarly journals Chemical Composition and Antioxidant Activity of the Essential Oil and Fatty Acids of the Flowers of Rhanterium Adpressum

2013 ◽  
Vol 8 (8) ◽  
pp. 1934578X1300800 ◽  
Author(s):  
Chahrazed Hamia ◽  
Nadhir Gourine ◽  
Hadjer Boussoussa ◽  
Mokhtar Saidi ◽  
Emile M. Gaydou ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Essential Oil ◽  
Antioxidant Activities ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Lipid Extract ◽  
Total Phenolic ◽  
Phenolic Contents ◽  
Total Phenolic Contents ◽  
Oil Extract

The essential oil obtained by hydrodistillation of the flowers of Rhanterium adpressum Coss. & Durieu was analyzed using GC and GC-MS. The essential oil was very rich in monoterpene compounds. The major components identified were the monoterpene hydrocarbons: camphene (21.8%), myrcene (19.3%) and α-pinene (17.4%). Other compounds, including limonene, β-pinene and terpinol-4-ol, were present in low content (4–6%). The composition of the fatty acids in the lipid extract obtained from the flowers was also investigated by GC and GC-MS. The main fatty acids identified were palmitic (47.4%), oleic (12.9%) and stearic acids (10.6%). The total phenolic contents and the antioxidant activities were also evaluated for both extracts. The total phenolic contents were determined using the Folin-Ciocalteu reagent and the antioxidant activities were measured using three different assays: DPPH (1,1-diphenyl-2-picrylhydrazyl) free radical scavenging activity, FRAP (ferric reducing antioxidant potential) and a molybdenum assay. As a result of these tests, the lipid extract exhibited the highest antioxidant activities in comparison with the essential oil extract.

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