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You searched for: Author "Sato, Takafumi" Remove constraint Author: "Sato, Takafumi" Subject antioxidant activity Remove constraint Subject: antioxidant activity
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1. Extraction of strawberry leaves with supercritical carbon dioxide and entrainers: Antioxidant capacity, total phenolic content, and inhibitory effect on uric acid production of the extract

Author:
Sato, Takafumi,   et al.   ; Ikeya, Yoshiro; Adachi, Shin-ichi; Yagasaki, Kazumi; Nihei, Ken-ichi; Itoh, Naotsugu;     Show all 6 Authors
Source:
Food and bioproducts processing 2019 v.117 pp. 160-169
ISSN:
0960-3085
Subject:
acetone; agricultural wastes; antioxidant activity; antioxidants; byproducts; carbon dioxide; ethanol; hepatocytes; leaf extracts; leaves; solubility; solvents; strawberries; temperature; uric acid; vapor pressure
Abstract:
... The recovery of useful components such as antioxidants from strawberry leaves would be desirable because this byproduct is usually disposed of as agricultural waste. In this study, strawberry leaves were extracted with supercritical carbon dioxide (sc-CO2) and the effects of various entrainers were evaluated under the following conditions: temperature from 308 to 333K, pressure from 15 to 30MPa, a ...
DOI:
10.1016/j.fbp.2019.07.003

2. Hydrothermal Extraction of Antioxidant Compounds from Green Coffee Beans and Decomposition Kinetics of 3-o-Caffeoylquinic Acid

Author:
Sato, Takafumi,   et al.   ; Takahata, Takuya; Honma, Tetsuo; Watanabe, Masaru; Wagatsuma, Masayoshi; Matsuda, Shiho; Smith, Richard Lee; Itoh, Naotsugu;     Show all 8 Authors
Source:
Industrial & engineering chemistry process design and development 2018 v.57 no.22 pp. 7624-7632
ISSN:
1520-5045
Subject:
antioxidant activity; antioxidants; caffeine; chlorogenic acid; coffee beans; color; foods; glycosides; hydrolysis; melanoidins; phenolic compounds; process design; temperature
Abstract:
... Separation of antioxidant compounds (caffeoylquinic acids (CQAs), phenolics, melanoidin, and caffeine) from green coffee beans with hydrothermal extraction and decomposition kinetics of 3-o-caffeoylquinic acid (3-CQA) are reported. Antioxidant capacity (AOC) of the extracts increased as extraction temperature was increased up to 410 K and then it decreased up to extraction temperatures of 500 K. A ...
DOI:
10.1021/acs.iecr.8b00821

3. Purification and Characterization of Polyphenols from Chestnut Astringent Skin

Author:
Sato, Takafumi,   et al.   ; Tsujita, Takahiro; Yamada, Misato; Takaku, Takeshi; Shintani, Tomoyoshi; Teramoto, Kanae;     Show all 6 Authors
Source:
Journal of agricultural and food chemistry 2011 v.59 no.16 pp. 8646-8654
ISSN:
0021-8561
Subject:
Castanea; alpha-amylase; antioxidant activity; blood glucose; corn starch; dialysis; ellagic acid; gallic acid; oral administration; proanthocyanidins; procyanidins; rats; tannins
Abstract:
... Polyphenolic compounds from chestnut astringent skin (CAS) were purified by dialysis, using Diaion HP-20 and Sephadex LH-20 columns. During purification, specific alpha-amylase inhibitory activities were increased about 3.4-fold, and the 50% inhibition value was 5.71 micrograms/mL in the Sephadex LH-20 fraction (SE-fraction). The SE-fraction contained about 67% of the total polyphenols, 57.3% of t ...
DOI:
10.1021/jf201679q
PubMed:
21777007