Determination of Total Polyphenols , Flavonoids Contents and Antioxidant Activity of Crude Methanolic and Aqueous Extracts for Some Medicinal Plants Flowers

2016 ◽  
Vol 2 (2) ◽  
pp. 53-61
Author(s):  
N. S. Erian ◽  
H. B. Hamed ◽  
A. Y. El-Khateeb
Keyword(s):  
Antioxidant Activity ◽  
Medicinal Plants ◽  
Aqueous Extracts ◽  
Total Polyphenols

The rapid determination of total polyphenols content and antioxidant activity in Dendrobium officinale using near-infrared spectroscopy

2016 ◽  
Vol 8 (23) ◽  
pp. 4584-4589 ◽  
Author(s):  
Longhui Ma ◽  
Zhimin Zhang ◽  
Xingbing Zhao ◽  
Sufeng Zhang ◽  
Hongmei Lu
Keyword(s):  
Antioxidant Activity ◽  
Infrared Spectroscopy ◽  
Near Infrared ◽  
Rapid Determination ◽  
Nir Spectroscopy ◽  
Dendrobium Officinale ◽  
Chemometric Methods ◽  
Total Polyphenols ◽  
Rapid Quantification

NIR spectroscopy coupled with chemometric methods for rapid quantification of total polyphenols content and antioxidant activity inDendrobium officinale.

scholarly journals Total Polyphenols, Total Flavonoid Contents, and Antioxidant Activity of Korean Natural and Medicinal Plants

2012 ◽  
Vol 44 (3) ◽  
pp. 337-342 ◽  
Author(s):  
Eun-Jin Kim ◽  
Joo-Yeon Choi ◽  
Mi-Ri Yu ◽  
Mi-Young Kim ◽  
Sang-Hyun Lee ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Medicinal Plants ◽  
Total Flavonoid ◽  
Total Polyphenols

scholarly journals Activité antioxydante de quelques plantes utilisées dans la région de Tiassalé (Côte d’Ivoire) dans le maintien de la santé de la peau

2018 ◽  
Vol 14 (30) ◽  
pp. 338
Author(s):  
Koffi Akessé Georges ◽  
Ahoua Angora Remi Constant ◽  
Ekou Lynda ◽  
Ekou Tchirioua ◽  
Kone Mamidou Witabouna
Keyword(s):  
Antioxidant Activity ◽  
Vitamin C ◽  
Cote D'ivoire ◽  
Côte D’Ivoire ◽  
Aqueous Extracts ◽  
Activité Antioxydante ◽  
Total Polyphenols ◽  
Cote D’Ivoire ◽  
Côte D'ivoire

Skin health is a concern for many people. This aim of this study is to evaluate in vitro the antioxidant activity of 10 plants used in cosmetopoeia for the maintenance of skin health. To achieve this objective, 30 extracts were tested using 2,2'-diphenyl-1-picrylhydrazyl radical (DPPH) and 2,2'-azino-bis (3-ethylbenzothiazoline-6) acid. -sulfonic) (ABTS + •) assays. The extracts studied were rich in total polyphenols, flavonoids, gallic tannins and alkaloids. For the DPPH reduction, 7 extracts including 5 methanolic and 2 aqueous extracts showed a percentage of inhibition similar to that of Vitamin C (95.79 ± 10.53%) used as a control. With ABTS, 11 extracts (5 methanol, 3 aqueous and 3 hexane) gave reduction percentages close to Trolox (95.97 ± 8.51%). These active plants could play a role in the maintaining of skin.

scholarly journals Phytochemistry, HPLC profile and antioxidant activity of aqueous extracts of fenugreek (Trigonella foenum graecum L.) seeds grown in arid zones of Algeria

2019 ◽  
Vol 6 (2) ◽  
pp. 71-87 ◽  
Author(s):  
Mohammed Nasir Assam Benziane ◽  
Kamel Acem ◽  
Hbib Aggad ◽  
Mustapha Abdali
Keyword(s):  
Antioxidant Activity ◽  
Secondary Metabolites ◽  
Aqueous Extract ◽  
Arid Zones ◽  
Aqueous Extracts ◽  
Total Polyphenols ◽  
Total Alkaloids ◽  
Significant Difference ◽  
Phytochemical Compounds ◽  
Trigonella Foenum Graecum L

Abstract Fenugreek is an herb that has the ability to resist multiple environmental insults, pests, diseases and many pathogens through the synthesis of substances allowing this plant protection, these substances are called phytochemical compounds or secondary metabolites. The aim of this study is to characterize these secondary metabolites in the extracts of fenugreek seeds grown in Algeria and compare the phytochemical profile and antioxidant activity of the aqueous extracts obtained by maceration and decoction. We carried out a “phytochemical screening” on both types of extracts in order to highlight the different classes of secondary metabolites and assaying total polyphenols by the method of Follin ciocaltchu, total alkaloids and tannins contained in these aqueous extracts and appreciate their antioxidant activity using the FRAP technique. A characterization of phytochemical molecules of the two types of Fenugreek extracts was done by chromatographic method with HPLC. Several phytochemical groups were identified in the extracts of fenugreek: tannins, saponins, flavonoids, terpenes and reducing nitrogen compounds. Chromatographic analysis of the samples show that 4 phytochemical molecules were identified in the aqueous maceration extract: kaempferol, genistein, vanillin and myrecitine and 3 molecules for the aqueous extract of decoction are: rutin, kaempferol and vanillin. The aqueous extract of decoction was characterized by the total polyphenols content (31.7 ± 0.031 mg GAE / 100 g of extract), total alkaloids (2.12 ± 0.015%) and tannins (9.75 ± 0.06%) that are higher than those obtained in the aqueous extract of maceration: total polyphenols (18.9 ± 0.12 mg GAE / 100g of extract), total alkaloids (1.71 ± 0.02%) and 8.69 ± 0.02% for the tannins. A non-significant difference was marked for antioxidant activity found in both types of extracts (56.90 ± 0.013 mg AAE / 100g decoction extract against 56.37 ± 0.24 mg AAE / 100g maceration extract). In the end we conclude that fenugreek may be a promising plant genetic resource responsible for an important biological activity, except its nutritional and therapeutic properties due to their phytochemical compounds.

scholarly journals Polyphenols quantification and antioxidant activity of methanolic and aqueous extracts from eight medicinal plants used to manage avian diseases in Burkina Faso

2021 ◽  
Vol 15 (5) ◽  
pp. 226-231
Author(s):  
Kagambega Windmi ◽  
Nag-Tiero Meda Roland ◽  
Kouliga Koama Benjamin ◽  
Drabo Anne-Flora ◽  
Belem Hadidjatou ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Medicinal Plants ◽  
Burkina Faso ◽  
Aqueous Extracts ◽  
Avian Diseases
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