Zobrazeno 1 - 10
of 75
pro vyhledávání: '"Masahito Oka"'
Autor:
Mitsuhiro Yuge, Kenji Kono, Yoshiaki Hirano, Makoto Kitamura, Masahito Oka, Masakazu Furuta, Isao Kaetsu, Sachiro Kakinoki
Publikováno v:
Polymer Bulletin. 58:393-400
Poly(proline) and random copolypeptide composed of Pro and Ala residues were synthesized, and their solution properties and molecular conformation were investigated. Aqueous solutions of the polypeptide were irradiated with γ-rays above the transiti
Publikováno v:
Polymer Bulletin. 54:303-310
Several types of poly(Gly-co-Pro) and poly(Ala-co-Pro) were synthesized. Their molecular conformations and thermosensitive properties were investigated in an attempt to find new thermosensitive materials. These polypeptides were assumed the polyproli
Publikováno v:
Polymer Bulletin. 53:109-115
Proline oligopeptides composed of 13, 6 and 4 Pro residues were synthesized by solid-phase procedure. The circular dichroism spectra showed that the proline oligopeptides form the polyproline-II helix in water and in trifluoroethnol. However, it was
Autor:
Shinya Yodoya, Minoru Nagata, Tetsuya Takagi, Takanori Hayashi, Toshio Hayashi, Masahito Oka, Michiyoshi Kurotani
Publikováno v:
European Polymer Journal. 39:2059-2067
A–B–A type tri-block copolymer consisting of N -hydroxypropyl- l -glutamine as the A component and l -alanine as the B component as well as the corresponding random copolymers and homopolymers were prepared by carrying out an aminoalcoholysis rea
Publikováno v:
Polymer Bulletin. 51:143-150
Several types of poly(Hyp(Bzl)-co-Pro)s were synthesized. Their molecular conformations and thermosensitive properties were investigated in an attempt to find new thermosensitive materials. These polypeptides assumed the polyproline-II structure in t
Publikováno v:
Polymer Bulletin. 50:389-395
Poly(N-hydroxyethyl-L-glutamine) (PHEG) hydrogels were prepared by aminolysis of poly( γ-benzyl L-glutamate) with 2-aminoethanol and hydrophobic or hydrophilic crosslinkers, and the effect of the hydrophobicity of the crosslinkers was evaluated. The
Autor:
Shinya Yodoya, Masakazu Furuta, Toshio Hayashi, Masahito Oka, Michiyoshi Kurotani, Takanori Hayashi, Tetsuya Takagi
Publikováno v:
European Polymer Journal. 39:173-180
Water-insoluble bromelain was prepared by immobilizing bromelain onto the surface of porous copoly(γ-methyl- l -glutamate/ l -leucine) (ML) beads with and without spacer. The mode of the immobilization between bromelain and porous copolypeptide ML b
Publikováno v:
European Polymer Journal. 38:139-146
Two component random co-polypeptide hydrogels consisting of N -hydroxypropyl l -glutamine and l -alanine (Ala) or l -phenylalanine (Phe) were prepared by performing aminolysis reactions with 3-amino-1-propanol together with crosslinking reaction with
Publikováno v:
European Polymer Journal. 37:2483-2489
Two component water soluble random copolypeptides consisting of N -hydroxypropyl- l -glutamine and l -leucine were prepared by carrying out aminolysis reactions with 3-amino-1-propanol (P) on starting copolymers (ML) consisting of γ-methyl- l -gluta
Publikováno v:
European Polymer Journal. 37:2475-2481
A–B–A type block copolymer, PHPG–PB–PHPG, membranes consisting of poly( N -hydroxypropyl-L-glutamine) (PHPG) as the A component and polybutadiene (PB) as the B component were prepared by performing aminolysis reaction with 3-amino-1-propanol