T
Takeshi Nagai
Researcher at Yamagata University
Publications - 130
Citations - 4776
Takeshi Nagai is an academic researcher from Yamagata University. The author has contributed to research in topics: Ascorbic acid & Royal jelly. The author has an hindex of 30, co-authored 130 publications receiving 4356 citations. Previous affiliations of Takeshi Nagai include Iwate University & Tokyo University of Agriculture.
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Isolation of collagen from fish waste material — skin, bone and fins
TL;DR: In this article, type I collagen was prepared from fish skin, bone and fin, respectively, and the denaturation temperatures of these collagens were as follows: skin collagen (250-265°C), bone collagen (295-300°C) and fin collagen (280-291°C).
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Isolation and characterisation of acid and pepsin-solubilised collagens from the skin of Brownstripe red snapper (Lutjanus vitta)
TL;DR: Peptide maps of ASC and PSC hydrolysed by V8 protease and lysyl endopeptidase showed some differences in peptide patterns between the two fractions, suggesting differences in amino acid sequences and collagen conformation.
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Preparation and antioxidant properties of water extract of propolis
TL;DR: In this paper, a water extract of fresh propolis from Brazil was prepared using a lipid peroxidation model system, and the scavenging activity against superoxide anion radical was found to be high, at 50 and 100 mg/ml, completely inhibited the production of superoxide.
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Antioxidative activities of some commercially honeys, royal jelly, and propolis
TL;DR: In this article, the antioxidative effects of some honeys, royal jelly, and propolis were evaluated using a lipid peroxidation model, and the results showed that the superoxide-scavenging activities of all honeys were drastically decreased by heat treatment.
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Collagen of the skin of ocellate puffer fish (Takifugu rubripes)
TL;DR: It is suggested that ocellate puffer fish skin has potential as an alternative source of collagen for use in various fields, and the yields of acid-solubilized and pepsin- solventized collagens were very high on a dry weight basis.