Preparation and antioxidant properties of extracts of Japanese persimmon leaf tea (kakinoha-cha)

Sakanaka, Senji; Tachibana, Yumi; Okada, Yuki

doi:10.1016/j.foodchem.2004.03.013

Cited by 514 publications

(292 citation statements)

References 37 publications

Supporting

Mentioning

269

Contrasting

Unclassified

Order By: Relevance

“…As per Hwang et al, phenolic and flavonoid content was higher in ethanol extract than aqueous extract and also showed higher DPPH scavenging activity and reducing power 34 . DPPH is a free radical compound and has been widely used to test the free radical-scavenging ability of various samples 35 . It is a stable free radical with a characteristic absorption at 517 nm that was used to study the radical-scavenging effects of extracts.…”

Section: Discussionmentioning

confidence: 99%

Antioxidant Activity, Total Phenolic and Total Flavonoid Content of Oenanthe Javanica Blume (Dc) Collected From Imphal West District

Bhaigyabati¹,

Devi²,

Chvi³

et al. 2017

Int. Res. J. Pharm.

View full text Add to dashboard Cite

Oenanthe javanica Blume (DC) is an aromatic medicinal herb having pharmacological properties such as antioxidant, anti-quorum sensing, anticoagulant, antitoxic, hepatoprotective, anti-hepatitis B virus and memory improvement. It is one of the most consumed vegetable throughout the year in Manipur. The present study was carried out to analyze the phytochemical constituents, antioxidant activity and total phenolic and total flavonoid content of Oenanthe javanica. Preliminary phytochemical analysis was done using standard procedure. Total phenolic, total flavonoid content and antioxidant activities were determined spectrophotometrically in crude aqueous and methanolic extracts. Preliminary phytochemical analysis indicates the presence of amino acids, carbohydrates, proteins, flavonoids, phenolic compounds, steroids and terpenoids, saponins, tannins, cardiac glycosides except alkaloids and phlobatannins. The present study demonstrates the antioxidant activity of Oenanthe javanica Blume (DC) due to the various phytochemicals present in the extract which confer their traditional uses as food and medicine.

show abstract

Section: Discussionmentioning

confidence: 99%

Antioxidant Activity, Total Phenolic and Total Flavonoid Content of Oenanthe Javanica Blume (Dc) Collected From Imphal West District

Bhaigyabati¹,

Devi²,

Chvi³

et al. 2017

Int. Res. J. Pharm.

View full text Add to dashboard Cite

show abstract

“…The total flavonoids in the extracts were determined based on the method described by Sakanaka et al (2005). The results were expressed as mg of (+)-catechin equivalent per gram of extract.…”

Section: Antioxidant Compoundsmentioning

confidence: 99%

Influence of sonication treatments and extraction solvents on the phenolics and antioxidants in star fruits

et al. 2011

View full text Add to dashboard Cite

The present study was conducted to examine the effects of sonication treatments (time intervals of 0, 15, 30, 45 and 60 min.) on phenolics and other antioxidant compounds in starfruits extracted in methanol and water. Overall, methanolic extracts exhibited significantly higher extractability, percentage inhibition of DPPH radicals, ferric reducing antioxidant property (FRAP) value, antioxidant capacity, flavonoids, total phenolics and tannins (p<0.05) compared to control (0 min) and aqueous extracts. Methanolic extract obtained after 30 min of sonication proved to be the best treatment with regard to various parameters evaluated. Results of the present study clearly indicated sonication treatments to be effective in enhancing the antioxidant compounds in starfruit extracts and could be further explored for commercial purposes to benefit the consumers.

show abstract

“…Total flavonoid content was determined using a method described by Sakanaka, Tachibana, and Okada (2005). Briefly, 0.25 ml of the extracts (0.625-5 mg/ml) or rutin standard solution (15-250 mg/ml) was mixed with 1.25 ml of distilled water in a test tube, followed by addition of 75 ml of a 5% (w/v) sodium nitrite solution.…”

Section: Determination Of Total Flavonoid Contentmentioning

confidence: 99%

Antioxidant activity and total phenolic compounds of myrtle extracts Actividad antioxidante y contenido de compuestos fenólicos totales en extractos de myrtus

Amensour

Sendra

Abrini

et al. 2010

CyTA - Journal of Food

View full text Add to dashboard Cite

The total phenolic content, flavonoid content and antioxidant activity of methanol, ethanol, water and ethyl acetate extracts of the leaves and berries of myrtle (Myrtus communis) were measured. Total phenolic content was assessed by the Folin-Ciocalteau assay, total flavonoid content was assessed by a colorimetric method using rutin as standard flavonoid, whereas antioxidant activity was assessed by measuring the ability of the extracts to scavenge the 2,2 0 -azinobis (3-ethylbenzothiazoline-6-sulphonic acid) diammonium salt (ABTS þ ) radical. The results pointed to the significant antioxidant activities of the methanol and water extracts, the overall strength being in the order of methanol 4 water 4 ethanol 4 ethyl acetate in both, leaf and berry extracts. In all cases, the extracts obtained from leaves showed higher antioxidant activity and higher total phenolic and flavonoid contents than the corresponding extracts obtained from berries. The phenolic content exhibited a strong association (r 2 ¼ 0.9452) with antioxidant activity.Keywords: Myrtus communis; antioxidant activity; phenolic compounds; flavonoid Se determino´el contenido de compuestos feno´licos totales y de flavonoides, ası´como la actividad antioxidante de diferentes extractos (metanol, etanol, acetil e´ter y agua) de hojas y frutos de myrtus (Myrtus communis). El contenido de compuestos feno´licos totales se determino´mediante el me´todo de Folin-Ciocalteau, el contenido de flavonoides mediante un me´todo colorime´trico usando como flavonoide esta´ndar la rutina, mientras que la actividad antioxidante se determino´midiendo la capacidad de los extractos para captar el radical ABTS þ . Los resultados mostraron una significante actividad antioxidante de los extractos metano´licos y acuosos, siendo la intensidad de dicha actividad antioxidante en el siguiente orden: metanol 4 agua 4 etanol 4 acetil e´ter, tanto en el caso de los extractos procedentes de hojas como de frutos. Para todos los extractos, los procedentes de las hojas de myrtus presentaron mayor actividad antioxidante y mayor contenido en polifenoles totales y en flavonoides que los correspondientes extractos de frutos. El contenido total de compuestos feno´licos totales presento´una alta correlacio´n (r 2 ¼ 0,9452) con la actividad antioxidante.

show abstract

Preparation and antioxidant properties of extracts of Japanese persimmon leaf tea (kakinoha-cha)

Cited by 514 publications

References 37 publications

Antioxidant Activity, Total Phenolic and Total Flavonoid Content of Oenanthe Javanica Blume (Dc) Collected From Imphal West District

Antioxidant Activity, Total Phenolic and Total Flavonoid Content of Oenanthe Javanica Blume (Dc) Collected From Imphal West District

Influence of sonication treatments and extraction solvents on the phenolics and antioxidants in star fruits

Antioxidant activity and total phenolic compounds of myrtle extracts Actividad antioxidante y contenido de compuestos fenólicos totales en extractos de myrtus

Contact Info

Product

Resources

About