Zobrazeno 1 - 10
of 134
pro vyhledávání: '"Yasukazu Ohkatsu"'
Autor:
Yasukazu Ohkatsu, Fumie Suzuki
Publikováno v:
Journal of the Japan Petroleum Institute. 54:22-29
Combinations of two types of phenolic antioxidants were examined to assess synergistic or antagonistic interaction from both radical scavenging rate constant (kinh) and radical scavenging number (n). The synergism of two types of phenols was observed
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ffdac6b16921b4da948485f4d783ee12
https://doi.org/10.1627/jpi.54.22
https://doi.org/10.1627/jpi.54.22
Publikováno v:
Journal of the Japan Petroleum Institute. 54:15-21
Distearyl hydroxylamine has been developed as a polymer stabilizer, but the mechanism of action has not yet been clarified. The mechanism was investigated by evaluating the radical-scavenging potential. Distearyl hydroxylamine could better scavenge o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c1248be6b38344598ee709617e74ac5f
https://doi.org/10.1627/jpi.54.15
https://doi.org/10.1627/jpi.54.15
Publikováno v:
Journal of the Japan Petroleum Institute. 53:213-221
Antioxidant activities (including photo-antioxidant activities) of flavonoids were evaluated fundamentally and kinetically for the potential to produce plastic food packages with high antioxidant performance and food safety. Chalcones with two aromat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::57665bd9a12288996cee2dc9d032dfa5
https://doi.org/10.1627/jpi.53.213
https://doi.org/10.1627/jpi.53.213
Publikováno v:
Journal of Photochemistry and Photobiology A: Chemistry. 197:141-148
Catechins are studied vigorously, in particular, concerning the antioxidant ability as polyphenol, which is generally considered responsible for photo-antioxidant natures of catechins. In this study, the antioxidant and photo-antioxidant abilities of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::94718310cb0f2659f34fa565cbdda700
https://doi.org/10.1016/j.jphotochem.2007.12.019
https://doi.org/10.1016/j.jphotochem.2007.12.019
Autor:
Yoshiyuki Dobashi, Yasukazu Ohkatsu
Publikováno v:
Polymer Degradation and Stability. 93:436-447
So far, ultraviolet absorbers (UVA) have been discussed mainly on the basis of the extinction coefficient ( ɛ ), and the light degradation of polymeric materials is explained by photolysis of hydroperoxides and Norrish reactions of ketones. This stu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8f043cbb353bd06a5ee11db6b1c58989
https://doi.org/10.1016/j.polymdegradstab.2007.11.011
https://doi.org/10.1016/j.polymdegradstab.2007.11.011
Autor:
Yasukazu Ohkatsu
Publikováno v:
Journal of the Japan Petroleum Institute. 51:191-204
Hindered amine light stabilizers (HALS) possess many functions unlike other additives and are frequently used to extend the service life of polymeric materials, but show particular compatibility with certain other additives. However, combination does
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ce70994cb7032e1dc5279ccae72fd652
https://doi.org/10.1627/jpi.51.191
https://doi.org/10.1627/jpi.51.191
Autor:
Takuma Satoh, Yasukazu Ohkatsu
Publikováno v:
Journal of the Japan Petroleum Institute. 51:298-308
Chalcones are the starting materials for the biosynthesis of flavonoids. Flavonoids are strong antioxidants, which contain many phenolic hydroxyl group(s). However, the antioxidant activities of chalcones have been little studied. In this study, chal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::399e472562cdf78b58d51c08e53610b2
https://doi.org/10.1627/jpi.51.298
https://doi.org/10.1627/jpi.51.298
Publikováno v:
Journal of the Japan Petroleum Institute. 51:348-355
Phenylpropanoids are one of the metabolic products of phenylalanine and tyrosine. The antioxidant and photo- antioxidant activities were studied kinetically and along the metabolic pathway, to investigate the possibility of application to petrochemic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::587988cba1d5183daed70c61835252b5
https://doi.org/10.1627/jpi.51.348
https://doi.org/10.1627/jpi.51.348
Publikováno v:
Journal of the Japan Petroleum Institute. 51:95-101
The interaction of benzoate-type ultraviolet absorbers (UVA) with hindered amine light stabilizers (HALS) was investigated. Benzoate-type UVA showed antagonism or synergism with HALS, depending on the chemical structures of the UVA. p-Aminobenzoates
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::afe3a394f408affbda9584ac14e961f6
https://doi.org/10.1627/jpi.51.95
https://doi.org/10.1627/jpi.51.95
Autor:
Hiroyuki Takenaka, Yasukazu Ohkatsu
Publikováno v:
Journal of the Japan Petroleum Institute. 51:88-94
The synergism of hydrogen bond-type ultraviolet absorbers (UVA), such as phenyl salicylate and benzotriazole type UVA, and hindered amine light stabilizers (HALS) was investigated and compared with that of benzophenone type UVA. Phenyl salicylate and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8a032670e49b8fb58af5b7f8ecbcac64
https://doi.org/10.1627/jpi.51.88
https://doi.org/10.1627/jpi.51.88