Œ¤‹†˜_•¶

ŠÖ˜AƒŠƒ“ƒN
‚Ø–ā‚¢‡‚ķ‚¹
›Œ¤‹†˜_•¶ Report
»•iŠ‰ī
Nucreoside Ester
Sugar Ester
‰ļŽŠŠT—v
V’…ī•ń
HOME Japanese
Ž–‹ĘŠT—v

146. Yoichi Hiraguri and Yutaka Tokiwa

          gSynthesis of Biodegradable Functional Polymers by Radical Ring-Opening          Polymerization of 2-Methylene-1,3,6-trioxocane"

         Journnal of the Environment and Polymer
Published Online 21 April 2010

          DOI: 10. 1007/s10924-010-0175-2

145. Yutaka Tokiwa, Buenavenurada P. Calabia, Charles U. Ugwe and Seiichi Aiba

       gBiodegradable of Plastics"

         International Journal of Molecular Science
10, 3722-3742 (2009)

144. Isao Yumoto, Kikue Hirota, Yoshinobu Nodasaka, Yutaka Tokiwa and Kenji Nakajima

    gAlkalibacterium polygonumreducens sp. nov., an obligate alkaliphile that reduces an indigo dyeh

     International Journal of Systematic Evolutionary Microbiology   in press

 

143. C. U. Ugwu, Y. Tokiwa, H. Aoyagi, H. Uchiyama and H. Tanaka

gUV mutagenesis of Cupriavidus necator for extracellular production of (R)-3-hydroxybutyric acidh

 Journal of Applied Microbiology DOI: 10.1111/j.1365-2672.2008.03774.x

 

142. Yutaka Tokiwa and Masaru Kitagawa

     gSugar based polymers: Overview and recent advances of vinyl sugarsh

     ASC Symposium Series gPolymer biocatalysis and biomaterialsh Edited by Richard A. Gross and H.N. Cheng   in press

 

141. Cholticha Noomhorm and Yutaka Tokiwa

@@gSynthesis of aliphatic poly(ester-amide)s by ring-opening polymerization of L-lactide and amino acid anhydrides.h

ScienceAsia (Journal of the Science Society of Thailand) 34(1), ----- (2008) in press

 

140. Yutaka Tokiwa and Buenaventurada P. Calabia

gBiodegradability and biodegradation of polyestersh

Journal of Polymers and the Environment 15(4), (2007)  published on November 7

@DOI:10.1007^s10924-007-0075-2

@@@@@@@@@@@@@@@@@@@@@@@

139. Yutaka Tokiwa and Charles U. Ugwu

    gBiotechnological production of (R)-3-hydroxybutyric acid monomerh

     J. Biotechnology 132, 264-272 (2007)

 

138. Buenaventurada P.Calabia and Yutaka Tokiwa

    gProduction of D-lactic acid from sugarcane molasses, sugarcane juice and sugar beet juice by Lactobacillus delbrueckiih

    Biotechnology Letters  29, 1329-1332 (2007)

 

137. Yutaka Tokiwa, Masaru Kitagawa, Takao Raku, Shusaku Yanagitani and Kenji Yoshino

gEnzymatic synthesis of arbutin undecylenic acid ester and its inhibitory effect on melanin synthesish

 Bioorganic & Medicinal Chemistry Letters 17, 3105-3108 (2007)

 

136 Yutaka Tokiwa , Masaru Kitagawa@and Takao Raku

gEnzymatic synthesis of arbutin undecylenic acid ester and its inhibitory effect on mushroom tyrosinaseh

Biotechnology Letters 29, 481-486 (2007)

 

135. Buenaventurada P.Calabia and Yutaka Tokiwa

gA novel PHB depolymerase from a thermophilic Streptomyces sp.h

Biotechnology Letters 28, 383-388 (2006)

 

134. Yoichi Hiraguri, Kenichi Katase and Yutaka Tokiwa

gSynthesis of biodegradable hydrogel by radical ring-opening polymerization of 2-methylene-1,3,6-trioxocaneh

     Journal of Macromolecular Science, Part A:Pure and Applied Chemistry  43,1012-1027 (2006)

 

133. Yutaka Tokiwa and Buenaventurada P. Calabia

gBiodegradability and biodegradation of poly(lactide)h

     Applied Microbiology and Biotechnology 72, 244-251 (2006)        

 

132.  Walaiporn Timbuntam, Klanarong Sriroth and Yutaka Tokiwa

gLactic acid production from sugarcane juice by a newly isolated Lactobacillus sp.h

      Biotechnology Letters 28, 811-814 (2006)

 

131.  Cholticha Noomhorm and Yutaka Tokiwa

      gEffect of poly(dioxolane) as compatibilizer in poly(ƒĆ-caprolactone)/ tapioca starch blendsh

      Journal of Polymers and the Environment  14, 149-156 (2006)@@@@@@@

 

130.  Masaru Kitagawa and Yutaka Tokiwa

gPolymerization of vinyl sugar ester using ascorbic acid and hydrogen peroxide as a redox reagenth

Carbohydrate Polymers 64, 218-223 (2006)  

                    

129.  Amnat Jarerat, Yutaka Tokiwa and Hideo Tanaka

gProduction of poly(L-lactide)-degrading enzyme by Amycolatopsis orientalis for biological recycling of poly(L-lactide)h

Applied Microbiology and Biotechnology 72, 726-731 (2006)

 

128.  Akio Tsuchii and Yutaka Tokiwa

      gTwo-step cultivation method for microbial disintegration of tire rubber particlesh

      Journal of Polymers and the Environment  13, 75-80 (2005)

 

127.  Hyun-A Lim, Takao Raku and Yutaka Tokiwa

gHydrolysis of polyesters by serine proteaseh

@@  Biotechnology Letters  27, 459-464 (2005)

 

126.  Yutaka Tokiwa and Amnat Jarerat

gAccelerated microbial degradation of poly(L-lactide)h

      Macromolecular Symposia 224 gBio-Based Polymers: Recent Progressh  Edited by S.S. Im, Y.H. Kim, J.S. Yoon and I.-J. Chin.  367-376 (2005)                   

 

125.  Yoichi Hiraguri, Kenichi Katase and Yutaka Tokiwa

gBiodegradability of poly(ester-ether) and poly(ester) obtained from a radical ring-opening

polymerization of cyclic ketene acetalsh

      Journal of Macromolecular Science, Part A : Pure and Applied Chemistry 42:901-907 (2005)                                             

 

124.  Yutaka Tokiwa

gBioprocess and biodegradable plasticsh (in Japanese)

 Journal of Environmental Biotechnology, 4, 5-17 (2004)

 

123.  Hong Fan, Masaru Kitagawa, Takao Raku and Yutaka Tokiwa

gEnzymatic transesterification of purine nucleoside having a low solubility in organic

mediumh Biotechnology Letters 26, 1261-1264 (2004)

 

122.  Yujiang Fan, Haruo Nishida, Yoshihiro Shirai, Yutaka Tokiwa and Takeshi Endo

gThermal degradation behaviour of poly(lactic acid) stereocomplexh

Polymer Degradation and Stability 86 , 197-208 (2004) 

 

121.  Hong Fan, Masaru Kitagawa, Takao Raku and Yutaka Tokiwa

gEnzymatic synthesis of vinyl uridine esters catalyzed by Bioprase, alkaline protease from

Bacillus subtilish

Biochemical Engineering Journal 21, 279-283 (2004)

 

120.  Yutaka Tokiwa and Buenaventurada P. Calabia

gDegradation of microbial polyestershBiotechnology Letters 26, 1181-1189 ( 2004)

 

119.  Hyun-A Lim,Takao Raku and Yutaka Tokiwa

gA new method for the evaluation of biodegradable plastic using coated cellulose paperh

      Macromolecular Bioscience 4, 875-881(2004)              

 

118.  Amnat Jarerat,Yutaka Tokiwa and Hideo Tanaka

gMicrobial poly(L-lactide)-degrading enzyme induced by amino acids, and poly(L-amino

Acids)h

  Journal of Polymers and the Environment. 12, 139-146 (2004)

 

117.  Yutaka Tokiwa and Amnat Jarerat

gBiodegradation of poly(L-lactide)h

 Biotechnology Letters 26, 771-777 (2004)

 

116.  Takao Raku and Yutaka Tokiwa

gChemoenzymatic synthesis of optically active biodegradable polymers based on phenyl-and naphthyl-ethanols esterified with divinyladipateh

Biotechnology Letters 26, 665-670 (2004)              

 

115.  Yoichi Hiraguri and Yutaka Tokiwa

gBiodegradation of copolymer having ester-ether group in backbone and isopropylidene group in side-chainh

      J. Macromolecular Science Part A-Pure and Applied Chemistry A41, 329-334 (2004)     

 

114.  Buenaventurada P. Calabia and Yutaka Tokiwa

gMicrobial degradation of poly(D-3-hydroxybutyrate) by a new thermophilic Streptomyces

isolateh

Biotechnology Letters 26, 15-19 (2004)     

 

113.  Masaru Kitagawa, Kenji Yoshino and Yutaka Tokiwa

@@  gPolymerization of phenol catalyzed by crude extract from horseradishh

@@@Kobunnshi Ronbunshu (Japanese Journal of Polymer Science and Technology)@60, 95-100i2003j

 

112.  Amnat Jarerat, Yutaka Tokiwa and Hideo Tanaka

gPoly(L-lactide) degradation by Kibdelosporangium aridumh

      Biotechnology Letters 25, 2035-2038 (2003)      

 

111. Yutaka Tokiwa and Amnat Jarerat

gMicrobial degradation of aliphatic polyestersh

     Macromolecular Symposia  201, 283-289 (2003)    

 

110. Hong Fan, Masaru Kitagawa, Takao Raku and Yutaka Tokiwa

     gRole of water activity on the synthesis of vinyl thymidine catalyzed by protease from

Bacillus subtilish

 Macromolecular Bioscience 3, 420-424 (2003)

 

109. Takao Raku and Yutaka Tokiwa

     gRegioselective synthesis of kojic acid esters by Bacillus subtilis proteaseh

     Biotechnology Letters 25, 969-974 ( 2003)

 

108. Takao Raku and Yutaka Tokiwa

     gChemoenzymatic synthesis of fucose- or rhamnose-branched polymerh

     Macromolecular Bioscience  3, 151-156 (2003)

 

107. Takao Raku, Masaru.Kitagawa, Hiromi Shimakawa and Yutaka Tokiwa

     gEnzymatic synthesis of trehalose esters having lipophilicityh

     Journal of Biotechnology 100, 203-208 (2003)

 

106. Takao Raku, Masaru Kitagawa, Hiromi Shimakawa and Yutaka Tokiwa

     gEnzymatic synthesis of hydrophilic undecylenic acid sugar esters and their biodegradabilityh

     Biotechnology Letters 25, 161-166 i2003j

 

105. Amnat Jarerat and Yutaka Tokiwa

     gPoly(L-lactide) degradation by Saccharothrix waywayandensish

     Biotechnology Letters 25, 401-404 i2003j

 

104. Masaru Kitagawa, Takao Raku, Hong Fan, and Yutaka Tokiwa

     gEffect of DMSO on regioselective synthesis of vinyl sugars catalyzed by proteaseh

     ACS Sympisium Series 840 gBiocatalysis in Polymer Scienceh Edited by Richard A. Gross and H. N. Cheng, Chapter 8, 99-106 (2003)

 

103.  Yutaka Tokiwa, Hong Fan, Takao Raku, and Masaru Kitagawa

     gChemoenzymatic synthesis of nucleoside branched poly(vinyl alcohol)h

     ACS Symposium Series 840 gBiocatalysis in Polymer Scienceh  Edited by Richard A. Gross and H. N. Cheng, Chapter 7, 93-98 (2003)

 

102 Akio Tsuchii and Yutaka Tokiwa

   gDegradation of natural rubber products by Nocardia speciesh

    Biotransformations: Bioremediation Technology for Health and Environmental Protection, V.P. Singh and R.D. Stapleton, Jr. Editors, Elsevier Science B.V., 356-375 (2002)

 

101.  Amnat Jarerat, Hardaning Pranamuda and Yutaka Tokiwa

     gPoly(L-lactide)-degrading activity in various Actinomycetesh

     Macromolecular Bioscience. 2, 420-428 (2002)

 

100.  Yoichi Hiraguri and Yutaka Tokiwa

     gSynthesis of a new gel with enzymatic degradabilityh

     J Materials Science Letters 21, 1875-1876 (2002)

 

99.  Yutaka Tokiwa

     gBiodegradation of polycarbonatesh

Biopolymers  Vol.9 hMiscellaneous Biopolymers and Biodegradation of Polymersh , Ed. by S. Matsumura and A. Steinbuchel (WILEY-VCH Verlag GmbH) 19, 417-422i2002j

 

98.  Akio Tsuchii, Yoichi Hiraguri and Yutaka Tokiwa

     gBiological susceptibility of polystyreneh

     Biopolymers Vol.9 hMiscellaneous Biopolymers and Biodegradation of Polymersh , Ed. by S. Matsumura and A. Steinbuchel (WILEY-VCH Verlag GmbH)  16, 363-368 (2002)

 

97.  Yutaka Tokiwa

gBiodegradation of Polyurethansesh

     Biopolymers Vol.9 hMiscellaneous Biopolymers and Biodegradation of Polymersh , Ed. by S. Matsumura and A. Steinbuchel (WILEY-VCH Verlag GmbH)  9, 323-328i2002j

 

96.  Yoichi Hiraguri and Yutaka Tokiwa

     gSynthesis of thermosensitive polymers having enzymatic degradabilityh

     Clean Techn Environ Policy 4, 122-124 (2002)

 

95.  Masaru Kitagawa, Takao Raku, Hiromi Shimakawa, Hong Fan and Yutaka Tokiwa

     gEffect of water on the enzymatic synthesis of vinyl sugar ester in hydrophilic organic

     solventh

Macromolecular Bioscience  2, 233-237  (2002j

 

94.  Yutaka Tokiwa and Hardaning Pranamuda

     gMicrobial degradation of aliphatic polyestersh

Biopolymers Vol. 3b gPolyesters IIh Ed. by Y. Doi and A. Steinbuchel (WILEY-VCH Verlag GmbH) 4, 85-103 (2002)

 

93.  Yoichi Hiraguri and Yutaka Tokiwa

     gSynthesis of a novel water-soluble copolymer composed of 2-methylene-1,3,6-trioxocane and

     N-vinyl 2-pyrrolidoneh

Clean Products and Processes 3, 303-306 (2001)

 

92.  Yutaka Tokiwa, Goro Kawabata and Amnat Jarerat

     gA modified method for isolating poly(vinyl alcohol)-degrading bacteria and study of their     degradation patternsh  

Biotechnology Letters  23, 1937-1941 (2001) 

 

91.  Akio Tsuchii and Yutaka Tokiwa

gMicrobial degradation of tyre rubber particlesh

 Biotechnology Letters 23, 963-969 (2001)

 

90.  A.A. Vaidya, Takao Raku and Yutaka Tokiwa

gSynthesis, characterization and evaluation of new polymers for termo-precipitation of

adenosineh

Biotechnology Letters 23, 805-809 (2001)

 

89.  Amnat Jarerat and Yutaka Tokiwa

gDegradation of poly(tetramethylene succinate) by thermophilic actinomycetesh

     Biotechnology Letters 23, 647-651 (2001)

 

88.  Masaru Kitagawa, Hong Fan, Noriko Konagaya, Shigeo Shibatani, Naoki Kashimura,

     Ryuichiro Kurane and Yutaka Tokiwa

gGeneration of hydroxyl radicals from polymer containing reducing sugar branches in the

presence of hydrogen peroxideh

 Macromol. Chem. Phys. 202, 231-235 (2001)

 

87.  Amnat Jarerat and Yutaka Tokiwa

gDegradation of poly(L-lactide) by a fungush

 Macromolecular Bioscience 1, 136-140 (2001)

 

86.  Takao Raku and Yutaka Tokiwa

gSynthesis of thermosensitive polymers containing sugar branchesh

     Journal of Applied Polymer Science 80, 384-387 (2001)

 

85. Hardaning Pranamuda, Akio Tsuchii and Yutaka Tokiwa

gPoly(L-lactide)-degrading enzyme produced by Amycolatopsis sph  

    Macromolecular Bioscience 1, 25-29 (2001)

 

84. Masaru Kitagawa and Yutaka Tokiwa

gEnzymatic and chemical synthesis of polymers containing sugar ester branchesh

Kobunnshi Ronbunshu (Japanese Journal of Polymer Science and Technology) 57, 629-636 (2000)

 

83. Teizi Urakami, Shigeki Imagawa, Masahiro Harada, Akira Iwamoto and Yutaka Tokiwa

Development of biodegradable plastics, Poly-ƒĄ-hydroxybutyrate/caprolactone blend polymerh

@@Kobunnshi Ronbunshu (Japanese Journal of Polymer Science and Technology) 57, 263-270 (2000)

 

82. Haruo Nishida, Mitsuhiro Yamashita, Norikazu Hattori, Takeshi Endo and Yutaka Tokiwa

gThermal decomposition of poly(1,4-dioxan-2-one)h

 Polymer Degradation and Stability 70, 485-496 (2000)

 

81. Yutaka Tokiwa, Takao Raku, Masaru Kitagawa and Ryuichiro Kurane

gPreparation of polymeric biosurfactant containing sugar and fatty acid estersh

    Clean Products and Processes 2, 108-111 (2000)

 

80. Haruo Nishida, Mitsuhiro Yamashita, Takeshi Endo and Yutaka Tokiwa

gEquilibrium polymerization behavior of 1,4-dioxan-2-one in bulkh

    Macromolecules 33, 6982-6986 (2000)

 

79. Haruo Nishida, Mitsuhiro Yamashita, Masumi Nagashima, Norikazu Hattori,Takeshi Endo,

    and Yutaka Tokiwa

gTheoretical prediction of molecular weight on autocatalytic random hydrolysis of aliphatic

     polyestersh

 Macromolecules 33, 6595-6601 (2000)

 

78. Hiromi Uchida , Toshiaki Nakajima-Kambe , Yukie Shigeno-Kutsu ,Nobuhiko Nomura ,Yutaka Tokiwa and Tadaatsu Nakahara

gProperties of a bacterium which degrades solid poly(tetramethylene succinate)-co-adipate, a

biodegradable plastich

FEMS Microbiology Letters 189, 25-29 (2000)

 

77.  James G. Sanchez, Akio Tsuchii and Yutaka Tokiwa

gDegradation of polycaprolactone at 50Ž by a thermotolerant Aspergillus sp.h

Biotechnology Letters  22, 849-853 (2000)@

 

76.  Yutaka Tokiwa, Hong Fan, Yoichi Hiraguri, and Ryuichiro Kurane

gBiodegradation of a sugar branched polymer consisting of sugar, fatty acid, and poly(vinyl

alcoholh  

 Macromolecules  33, 1636-1639 (2000)

 

75.  Haruo Nishida, Mitsuhiro Yamashita, Masumi Nagashima, Takeshi Endo and Yutaka Tokiwa

gSynthesis of metal-free poly(1, 4-dioxan-2-one) by enzyme-catalyzed ring-opening

polymerizationh

     Journal of Polymer Science: Part A: Polymer Chemistry 38, 1560-1567 (2000)

 

74.  Masaru Kitagawa, Hong Fan, Tokao Raku, Ryuichiro Kurane and Yutaka Tokiwa

gPreparation of vinyl thymidine ester catalyzed by protease and its chemical polymerizationh

     Biotechnology Letters 22, 883-886 (2000)  

 

73.  Masaru Kitagawa, Tomoo Tokiwa, Hong Fan, Takao Raku, and Yutaka Tokiwa

gTransesterification reaction at various temperatures by an alkaline protease of Streptomyces

 sp.h

Biotechnology Letters 22, 879-882 (2000)

 

72.  Haruo Nishida, Mariko Konno and Yutaka Tokiwa

gMicrobial degradation of poly(p-dioxanone) ‡U.Isolation of hydrolyzates-utilizing

microorganisms and utilization of poly(p-dioxanone) by mixed cultureh

     Polymer Degradation and Stability 68, 271-280 (2000)

 

71.  Haruo Nishida, Mariko Konno, Ayumi Ikeda and Yutaka Tokiwa

gMicrobial degradation of poly(p-dioxanone) ‡T.Isolation of degrading microorganisms and

microbial decomposition in pure cultureh

     Polymer Degradation and Stability 68 , 205-217 (2000)

 

70.  A. M. Maszenan, R. J. Seviour, B. K. C. Patel, P. Schumann, J. Burghardt, Y. Tokiwa and H. M.

Stratton

gThree isolates of novel polyphosphate-accumulating gram-positive cocci, obtained

  from activated sludge, belong to a new genus, Tetrasphaera gen.nov., and description of two

  new species, Tetrasphaera japonica sp. nov. and Tetrasphaera australiensis sp. nov.h

      International Journal of Systematic and Evolutionary Microbiology 50,593-603 (2000)

 

69.  Haruo Nishida, Sayuri Suzuki, Mariko Konno and Yutaka Tokiwa

gMicrobial utilization of poly (ƒĄ-propiolactone) by sewage sludge and isolated strainsh

     Polymer Degradation and Stability 67, 291-297 (2000)

 

68.  Hardaning Pranamuda, Rungsima Chollakup and Yutaka Tokiwa

    gDegradation of polycarbonate by a polyester-degrading strain Amycolatopsis sp. strain HT-6.h

     Applied and Environmental Microbiology 65, 4220-4222 (1999)

 

67.  Hardaning Pranamuda and Yutaka Tokiwa

gDegradation of poly(L-lactide) by strains belonging to genus Amycolatopsish

     Biotechnology Letters 21, 901-905 (1999)

 

66.  Yutaka Tokiwa, Masaru Kitagawa, Hong Fan, Takao Raku, Yoichi Hiraguri, Shigeo Shibatani and Ryuichiro Kurane

    gSynthesis of vinyl arabinose ester catalyzed by protease from Streptomyces sp.h

     Biotechnology Techniques 13, 173-176 (1999).

 

65  Masaru Kitagawa, Hong Fan, Takao Raku, Shigeo Shibatani Yoshihiko Maekawa, Yoichi Hiraguri, Ryuichiro Kurane and Yutaka Tokiwa

    gSelective enzymatic preparation of vinyl sugar ester using DMSO as a denaturing co-solvent.h

     Biotechnology Letters 21, 355-359 (1999).

 

64.  Masaru Kitagawa, Panpaka Chalermisrachai, Hong Fan and Yutaka Tokiwa

gChemoenzymatic synthesis of biodegradable polymers containing glucobiose branchesh

     Macromol.Symp. 144, 247-256 (1999)

 

63.  Takao Yakou, Fumiko Sumida and Yutaka Tokiwa

gInfluence of the alloying time on the hardness and the electric resistivity of PCL/pure copper materials produced by the mechanical alloying processh

Transactions of the Japan Society of Mechanical EngineersiPart ‚`j65, 770-775i1999j

 

62.  Yutaka Tokiwa, Masaru Kitagawa, Hong Fan, Tetsuji Yokochi, Takao Raku,Yoichi Hiraguri,

Shigeo Shibatani, Yoshihiko Maekawa, Naoki Kashimura and Ryuichiro Kurane

gRegio-selective preparation of vinyl adenosine ester catalyzed by alkaline proteaseh

     Biotechnology Techniques 13, 563-566 (1999)

 

61.  Harudaning Pranamuda, Rungsima Chollakup and Yutaka Tokiwa

@   gDegradation of polycarbonate by a polyester-degrading strain, Amycolatopsis sp. strain

     HT-6h

Applied and Environmental Microbiology  65, 4220-4222 (1999)

 

60.  Yasuo Asada, Masato Miyake, Jun Miyake, Ryuichiro Kurane and Yutaka Tokiwa

gPhotosynthetic accumulation of poly- (hydroxybutyrate) by cyanobacteria„Ÿthe metabolism

  and potential for CO2  recyclingh

     International Journal of Biological Macromolecules 25, 37-42 (1999)

 

59.  Tetsushi Suyama, Toru Shigematsu, Shinichi Takaichi, Yoshinobu Nodasaka, Seizo Fujikawa,

Hiroyuki Hosoya, Yutaka Tokiwa, Takahiro Kanagawa and Satoshi Hanada

gRoseateles depolymerans gen. nov., sp.nov., a new bacteriochlorophyll a-containing obligate

 aerobe belonging to the ƒĄ-subclass of the Proteobacteriah

     International Journal of Systematic Bacteriology 49, 449-457 (1999)

 

58.  Yutaka Tokiwa, Mariko Konno and Haruo Nishida

gIsolation of silk degrading microorganisms and its poly (L-lactide) degradabilityh

     Chemistry Letters 355-356 (1999)

 

57.  Akio Tsuchii and Yutaka Tokiwa

gColonization and disintegration of tire rubber by a colonial mutant of Nocardiah

     Journal of Bioscience and Bioengineering 87, 542-544 (1999)

 

56.  Tetsushi Suyama, Yutaka Tokiwa, Pornpimol Quichanpagdee, Takahiro Kanagawa and Yoichi Kamagata

 gPhylogenetic affiliation of soil bacteria that degrade aliphatic polyesters available

     commercially as biodegradable plasticsh

     Applied and Environmental Microbiology, 64, 5008-5011 (1998)

 

55.  Myra L.Tansengco and Yutaka Tokiwa

gComparative population study of aliphatic polyesters-degrading microorganisms at 50Žh

     Chemistry Letters 1043-1044 (1998)

 

54.  Hideyuki Takahashi, Masato Miyake,Yutaka Tokiwa and Yasuo Asada

gImproved accumulation of poly-3-hydroxybutyrate by a recombinant cyanobacteriumh

     Biotechnology Letters, 20, 183-186 (1998)

 

53.  Masaru Kitagawa and Yutaka Tokiwa

gSynthesis of polymerizable sugar ester possessing long spacer catalyzed by lipase from

Alcaligenes sp.and its chemical polymerizationh  

Biotechnology Letters.  20, 627-630 (1998)

 

52.  Haruo Nishida, Sayuri Suzuki and Yutaka Tokiwa

gDistribution of poly(ƒĄ-propiolactone) aerobic degrading microorganisms in differenth

EnvironmentshJournal of Environmental Polymer Degradation, 6, 43-58 (1998)

 

51. Yutaka Tokiwa, Masaru Kitagawa, Hong Fan, Takao Raku, Shigeo Shibatani, Yoshihiko Maekawa and Ryuichiro Kurane

gChemical and enzymatic synthesis of polymer containing reducing sugar branchesh

Japanese Journal of Polymer Science and Technology .55, 691-696 (1998)

 

50.  Masaru Kitagawa, Shinsuke Takegami and Yutaka Tokiwa

gFree-radical polymerization of a reducing vinyl sugar ester in dimethylformamide and

     waterh 

Macromol.Rapid Commun. 19, 155-158 (1998)

 

49.  Masaru Kitagawa and Yutaka Tokiwa

gGeneration of superoxide by synthetic polymers containing reducing sugar branchesh

     Chemistry Letters 281-282 (1998)

 

48.  M.L.Tansengco and Y.Tokiwa

gThermophilic microbial degradation of poly(ethylene succinate).h    

  World Journal of Microbiology & Biotechnology 14, 133-138 (1998)

 

47.  Naoaki Kataoka and Yutaka Tokiwa

gIsolation and characterization of an active mannanase-producing anaerobic

bacterium,Clostridium tertium KT-5A from lotus soilh

     Journal Applied Microbiology 84,357-367 (1998)

 

46.  Masaru Kitagawa and Yutaka Tokiwa

gSynthesis of a polymerizable glucose ester in hydrophilic organic solvents catalyzed by alkaline protease from Streptomyces sph

     Journal Carbohydrate Chemistry 17, 893-899 (1998)

 

45.  Tetsushi Suyama, Hiroyuki Hosoya and Yutaka Tokiwa

gBacterial isolates degrading aliphatic polycarbonatesh

     FEMS Microbiology Letters 161, 255-261 (1998)

 

44.  Masaru Kitagawa and Yutaka Tokiwa

gEnzymatc synthesis of polymerizable sugar ester and its chemical polymerizationh

     Carbohydrate Letters 2, 343-348 (1997)

 

43.  Yoichi Hiraguri and Yutaka Tokiwa

gSynthesis of photodegradable polymers having biodegradability and their biodegradations and photolysish

Macromolecules 30, 3691-3693 (1997)

 

42.  Hardaning Pranamuda, Yutaka Tokiwa and Hideo Tanaka

gPolylactide degradation by an Amycolatopsis sph

     Applied and Environmental Microbiology 63, 1637-1640 (1997)

 

41.  Shigeo Shibatani, Masaru Kitagawa and Yutaka Tokiwa

gEnzymatic synthesis of vinyl sugar ester in dimethylformamideh

    Biotechnology Letters 19, 511-514 (1997)

 

40.  Tetsushi Suyama and Yutaka Tokiwa

gEnzymatic degradation of an aliphatic polycarbonate, poly (tetramethylene carbonate)h

     Enzyme and Microbial Technology 20, 122-126, (1997)

 

39.  Akio Tsuchii, Kiyoshi Takeda and Yutaka Tokiwa

gDegradation of the rubber in truck tires by a strain of Nocardiah

     Biodegradation 7, 405-413, (1997) 

38. Taro Suzuki, Masato Miyake, Yutaka Tokiwa, Haruhisa Saegusa, Terumi Saito and Yasuo   

Asada

gA recombinant cyanobacterium that accumulates poly-(hydroxybutyrate)h

     Biotechnology Letters, 18, 1047-1050 (1996)

 

37.  Naoaki Kataoka, Yutaka.Tokiwa, Yasuo Tanaka, Kiyoshi Takeda and Taro Suzuki

gEnrichment culture and isolation of slow-growing bacteriah

     Applied Microbiology and Biotechnology 45, 771-777 (1996)

 

36.  Akio Tsuchii, Kiyoshi Takeda, Tomoo Suzuki and Yutaka Tokiwa

gColonization and degradation of rubber pieces by Nocardia sp.h

     Biodegradation 7, 41-48 (1996)

 

35.@Hardaning Pranamuda, Yutaka Tokiwa and Hideo Tanaka

gPhysical properties and biodegradability of blends containing Poly (ƒĆ-caprolactone) and

  tropical starchesh

Journal of Environmental Polymer Degradation 4, 1-7 (1996)

 

34.@Taro Suzuki, Anatoly Tsygankov, Jun Miyake, Yutaka Tokiwa and Yasuo Asada

gAccumulation of poly-(hydroxybutyrate) by a non-sulfur photosynthetic bacterium, Rhodobacter sphaeroides RV at different pHh

Biotechnology Letters 17, 395-400 (1995)

 

33.  Haruo Nishida and Yutaka Tokiwa

gConfirmation of colonization of degrading bacterium strain SC-17 on poly (3-hydroxybutyrate) cast filmh

Journal of Environmental Polymer Degradation 3, 187-197 (1995)

 

32.@Hardaning Pranamuda, Yutaka Tokiwa and Hideo Tanaka

gMicrobial degradation of an aliphatic polyester with a high melting point,

poly(tetramethylene succinate)h

Applied and Environmental Microbiology  61, 1828-1832 (1995)

 

31.  Masatsugu Mochizuki, Madoka Hirano, Yoshihiro Kanmuri,Kazushige Kudo and Yutaka

Tokiwa

gHydrolysis of polycaprolactone fibers by lipase : Effects of draw ratio on enzymatic

degradationh

Journal of Applied Polymer Science, 55, 289-296 (1995)

 

30.  Akira Iwamoto and Yutaka Tokiwa

gEnzymatic degradation of plastics containing polycaprolactoneh

     Polymer Degradation and Stability 45, 205-213 (1994)

 

29.  Kenichi Ito, Kiyoshi Takeda and Yutaka Tokiwa

gBacteria flora involved in anaerobic digestion of butyrateh (in Japanese)

     Bulletin of Japanese Society of Microbial Ecology 9, 7-14 (1994)

 

28.  Haruo Nishida and Yutaka Tokiwa

gConfirmation of poly (1,3-dioxolan-2-one) degrading microorganisms in environmenth

     Chemistry Letters, 421-422 (1994)

 

27.  Haruo Nishida and Yutaka Tokiwa

gDegradation of poly(2-oxepanone) by phytopathogensh Chemistry Letters , 1547-1550 (1994)

 

26.  Haruo Nishida and Yutaka Tokiwa

gConfirmation of anaerobic poly (2-oxepanone) degrading microorganisms in environments g

     Chemistry Letters, 1293-1994 (1994)

 

25.  Akira Iwamoto and Yutaka Tokiwa

gEffect of the phase structure on biodegradability of polypropylene / poly(ƒĆ-caprolactone)

      blendsh

Journal of Applied Polymer Science , 52, 1357-1360 (1994)

 

24.  Haruo Nishida and Yutaka Tokiwa

gEffects of higher-order structure of poly (3-hydroxybutyrate) on its biodegradation.

‡U. Effects of crystal structure on microbial degradationh

     Journal of Environmental Polymer Degradation, 1, 65-80 (1993).

 

23. Shinji Komatsu and Yutaka Tokiwa

gSynthesis of copolyamide-esters and their enzymatic hydrolysish

@@Kobunnshi Ronbunshu (Japanese Journal of Polymer Science and Technology) 50, 785-788  (1993)

 

22.  Haruo Nishida and Yutaka Tokiwa

gDistribution of poly(3-hydroxybutyrate)-degrading anaerobic bacteriah

@@Kobunnshi Ronbunshu (Japanese Journal of Polymer Science and Technology) 50, 739-746  (1993)

 

21. Akira Iwamoto and Yutaka Tokiwa

gEffects of the blend ratio and melt viscosity on biodegradability of plastics containing an aliphatic polyesterh

@@Kobunnshi Ronbunshu (Japanese Journal of Polymer Science and Technology) 50, 789-791 (1993)

 

20.  Youichi Hiraguri and Yutaka Tokiwa

gSynthesis of copolymers composed of 2-methylene-1, 3, 6-trioxocane and vinyl monomers

and their enzymatic degradationh

     Journal of Polymer Science: Part A : Polymer Chemistry, 31, 3159-3163 (1993)

 

19.  Haruo Nishida and Yutaka Tokiwa

gDistribution of poly (ƒĄ-hydroxybutyrate) and poly (ƒĆ-caprolactone) aerobic degrading

microorganisms in different environmentsh

     Journal of Environmental Polymer Degradation, 1, 227-233 (1993)

 

18.  Kiyoshi Takeda, Kenichi Ito, Satoshi Amatani and Yutaka Tokiwa

gBacterial composition of flocs and aqueous phase in a methanogenic digesterh

     Bulletin of Japanese Society of Microbial Ecology, 7, 27-37 (1992)

 

17.  Yutaka Tokiwa, Akira Iwamoto, Masatoshi Koyama, Naoaki Kataoka and Haruo Nishida

gBiological recycling of plastics containing ester bondsh

     Makromol. Chem, Macromol. Symp, 57, 273-280 (1992)

 

16. Haruo Nishida and Yutaka Tokiwa

gDistribution of poly(ƒĄ-hydroxybutyrate) and poly(ƒĆ-caprolactone) degrading

microorganisms and microbial degradation behavior on plastic surfaces.h

American Chemical Society, Polym. Mats. Sci. Eng. 65, 137-138 (1992).

 

15.  Haruo Nishida and Yutaka Tokiwa

gEffects of higher-order structure of poly (3-hydroxybutyrate) on its biodegradation.

 ‡T. Effects of heat treatment on microbial degradationh

     Journal of Applied Polymer Science 46, 1467-1476 (1992)

 

14.  Naoaki Kataoka, Yutaka Tokiwa, Yasuo Tanaka. Kiichi Fujiki,Hiroyuki Taroda and Kiyoshi

     Takeda

gExamination of bacterial characteristics of anaerobic membrane bioreactors in three

      pilot-scale plants for treating low-strength wastewater by application of the

      colony-forming-curve analysis methodh

      Applied and Environmental Microbiology 58, 2751-2757 (1992)

 

13. Naoaki Kataoka, Yutaka Tokiwa and Kiyoshi Takeda

gImproved technique for identification and enumeration of methanogenic bacterial colonies on

roll tubes by epifluorescence microscopyh

    Applied and Environmental Microbiology, 57, 3671-3673 (1991)

 

12. Yutaka Tokiwa, Akira Iwamoto and Masatoshi Koyama

gDevelopment of biodegradable plastics containing polycaprolactoneh

    American Chemical Society, Polym. Mats. Sci. Eng., 63, 742-746 (1990)

 

11.  Yutaka Tokiwa, Tadanao Ando, Tomoo Suzuki and Kiyoshi Takeda

gBiodegradation of synthetic polymers containing ester bondsh

     American Chemical Society, Symposium Series 433, 136-148 (1990)

 

10.   Yutaka Tokiwa, Tomoo Suzuki and Kiyoshi Takeda

gTwo types of lipases in hydrolysis of polyesterh

     Agricultural and Biological Chemistry 52, 1937-1943 (1988)

 

9.   Keisuke Tubaki, Tsuyoshi Hosoya, Akira Nakagiri and Yutaka Tokiwa

     gPrototheca, isolted from the sewage treatment planth

     J. Antibac. Antifung. Agents 15, 487-490 (1987)

 

8.   Yutaka Tokiwa, Tomoo Suzuki and Kiyoshi Takeda

gHydrolysis of polyesters by Rhizopus arrhizus lipaseh

     Agricultural and Biological Chemistry 50, 1323-1325 (1986)

 

7.   Yutaka Tokiwa and Tomoo Suzuki

gHydrolysis of copolyesters containing aromatic and aliphatic ester blocks by lipaseh

     Journal of Applied Polymer Science 26, 441-448 (1981)

 

6.   Yutaka Tokiwa, Tomoo Suzuki and Tadanao Ando

gSynthesis of copolyamide-esters and some aspects involved in their hydrolysis by lipaseh

     Journal of Applied Polymer Science 24, 1701-1711 (1979)

 

5.@ Yutaka Tokiwa and Tomoo Suzuki

gHydrolysis of polyesters by Rhizopus delemar lipaseh

     Agricultural and Biological Chemistry 42, 1071-1072 (1978)

 

4. @Yutaka Tokiwa and Tomoo Suzuki

gHydrolysis of polyesters by lipasesh

     Nature Vol. 270, No. 5632, November 3, 76-78 (1977)

 

3.@ Yutaka Tokiwa and Tomoo Suzuki 

gPurification and some properties of polyethylene adipate-degrading enzyme produced by

 Penicillium sp.strain 14-3h

     Agricultural and Biological Chemistry 41, 265-274 (1977)

 

2. @Yutaka Tokiwa, Tadanao Ando and Tomoo Suzuki

gDegradation of polycaprolactone by a fungush

     Journal of Fermentation Technology 54, 603-608 (1976)

 

1. @Yutaka Tokiwa and Tomoo Suzuki

gDegradation of poly-ethylene glycol adipate by a fungush

     Journal of Fermentation Technology 52, 393-398 (1974)

 

English