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Journal Articles

Control of biodegradability of poly(3-hydroxybutyric acid) film with grafting acrylic acid and thermal remolding

Wada, Yuki; Mitomo, Hiroshi*; Kasuya, Kenichi*; Nagasawa, Naotsugu; Seko, Noriaki; Katakai, Akio; Tamada, Masao

Journal of Applied Polymer Science, 101(6), p.3856 - 3861, 2006/09

 Times Cited Count:21 Percentile:53.53(Polymer Science)

Radiation-induced graft polymerization of acrylic acid (AAc) on the surface of poly(3-hydroxybutyric acid) (PHB) film was carried out by applying pre-irradiation techniques. The PHB films grafted with AAc (PHB-g-AAc) possessed a degree of grafting higher than 5% have completely lost the enzymatic degradability. The enzymatic degradability of the grafted film was recovered by remolding. And the highest enzymatic degradation rate was observed to grafted films with AAc 10% of degree. Difference of enzymatic degradability of PHB-g-AAc film was caused by decrement of amount of enzyme contact and decrement of crystallinity of PHB by remolding.

Journal Articles

Enzymatic degradation of radiation crosslinked poly($$varepsilon$$-caprolactone)

Darwis, D.*; Mitomo, Hiroshi*; *; Yoshii, Fumio; Makuuchi, Keizo

Poly. Degrad. Stab., 62, p.259 - 265, 1998/00

 Times Cited Count:61 Percentile:87.71(Polymer Science)

no abstracts in English

Journal Articles

Degradability of poly(3-hydroxybutylate) and its copolymer grafted with styrene by radiation

K.Bahari*; Mitomo, Hiroshi*; *; Yoshii, Fumio; Makuuchi, Keizo

Polym. Degrad. Stab., 61, p.245 - 252, 1998/00

 Times Cited Count:40 Percentile:79.34(Polymer Science)

no abstracts in English

Journal Articles

Effect of $$gamma$$-irradiation on enzymatic digestion of oil palm empty fruit bunch

Matsuhashi, Shimpei; Kume, Tamikazu; Hashimoto, Shoji; M.R.Awang*

Journal of the Science of Food and Agriculture, 69, p.265 - 267, 1995/00

 Times Cited Count:5 Percentile:34.48(Agriculture, Multidisciplinary)

no abstracts in English

Journal Articles

Radiation degradation of a new biodegradable copolyester consisting of epsilon-caprolactone and delta-valerolactone prepared by direct polycondensation in the absence of catalysts

*; *; Yoshida, Masaru; *; Asano, Masaharu; Kumakura, Minoru

Radiation Physics and Chemistry, 39(2), p.235 - 236, 1992/00

no abstracts in English

Journal Articles

Sequential polydepsipeptides containing tripeptide sequences and $$alpha$$-hydroxy acids as biodegradable carriers

Yoshida, Masaru; Asano, Masaharu; Kumakura, Minoru; Katakai, Ryoichi*; Mashimo, Toru*; Yuasa, Hisako*; Yamanaka, Hidetoshi*

European Polymer Journal, 27(3), p.325 - 329, 1991/00

 Times Cited Count:14 Percentile:59.1(Polymer Science)

no abstracts in English

Journal Articles

Effect of phosphoric acid on the polycondensation of $$varepsilon$$-caprolactone with $$delta$$-valerolactone and biodegradation of their copolyesters

*; *; Yoshida, Masaru; *; Asano, Masaharu; Kumakura, Minoru

Makromol. Chem., 192, p.1067 - 1072, 1991/00

no abstracts in English

Journal Articles

Synthesis of low molecular weight copoly(L-lactic acid/$$varepsilon$$-caprolactone) by direct copolycondensation in the absence of catalysts, and enzymatic degradation of the polymers

*; Yoshida, Masaru; Asano, Masaharu; Kumakura, Minoru; Mashimo, Toru*; Yuasa, Hisako*; Imai, K.*; Yamanaka, Hidetoshi*

Polymer, 31, p.2006 - 2014, 1990/10

 Times Cited Count:111 Percentile:96.31(Polymer Science)

no abstracts in English

Journal Articles

Sequential polydepsipeptides as biodegradable carriers for drug delivery systems

Yoshida, Masaru; Asano, Masaharu; Kumakura, Minoru; Katakai, Ryoichi*; Mashimo, Toru*; Yuasa, Hisako*; Imai, K.*; Yamanaka, Hidetoshi*

J. Biomed. Mater. Res., 24, p.1173 - 1184, 1990/00

 Times Cited Count:32 Percentile:75.14(Engineering, Biomedical)

no abstracts in English

Journal Articles

A New biodegradable polydepsipeptide consisting of (L-alanyl)$$_{n}$$-L-lactyl sequences(n=0,1,2, and 3)

Yoshida, Masaru; Asano, Masaharu; Kumakura, Minoru; Katakai, Ryoichi*; Mashimo, Toru*; Yuasa, Hisako*; Imai, K.*; Yamanaka, Hidetoshi*

Makromol. Chem. Rapid Commun., 11, p.337 - 343, 1990/00

no abstracts in English

Journal Articles

Low-molecular-weight copolymers composed of L-lactic acid and various DL-hydroxy acids as biodegradable carriers

*; *; Yoshida, Masaru; Asano, Masaharu; Kumakura, Minoru

Makromol. Chem., 190, p.2571 - 2577, 1989/00

no abstracts in English

Journal Articles

Study on biodegradability of [AlaAlaGlu(OEt)Lac]$$_{n}$$ as a polydepsipeptide

Asano, Masaharu; ; Kaetsu, Isao; *; *; *; *; *

Seitai Zairyo, 3(2), p.85 - 94, 1985/00

no abstracts in English

12 (Records 1-12 displayed on this page)
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