Browsing NTNU Open by Author "Yoshiba, Kazuto"
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Association with Imidazole in the Cooperative Order–Disorder Transition in Aqueous Solution of Schizophyllan
Yoshiba, Kazuto; Yasuda, Yota; Christensen, Bjørn E.; Kondo, Chisaki; Miyazaki, Yuji; Nakano, Motohiro (Peer reviewed; Journal article, 2022)Schizophyllan, a triple helical polysaccharide, exhibits cooperative order–disorder transition (CODT) in aqueous solutions. The transition transforms the ordered structure (triple helix I) formed between the branched side ... -
Conformation and cooperative order-disorder transition in aqueous solutions of β-1,3-D-glucan with different degree of branching varied by the Smith degradation
Yoshiba, Kazuto; Saheki, Toshihiko; Christensen, Bjørn E.; Dobashi, Toshiaki (Peer reviewed; Journal article, 2019)β‐1,3‐d‐glucan with different degrees of branching were obtained by selectively and gradually removing side chains from schizophyllan, a water‐soluble triple helical polysaccharide, using the Smith degradation. Size exclusion ... -
Conformation of carboxylated schizophyllan in aqueous solution
Yoshiba, Kazuto; Sato, Takahiro; Osumi, Takaaki; Ulset, Ann-Sissel Teialeret; Christensen, Bjørn E. (Journal article; Peer reviewed, 2015)Carboxylated schizophyllan (sclerox) samples of different degrees of oxidation were molecularly characterized by size exclusion chromatography equipped with a multi-angle light scattering detector (SEC-MALS) in 0.10 M ... -
Cooperative Order−Disorder Transition of Carboxylated Schizophyllan in Water−Dimethylsulfoxide Mixtures
Yoshiba, Kazuto; Dobashi, Toshiaki; Ulset, Ann-Sissel Teialeret; Christensen, Bjørn E. (Journal article; Peer reviewed, 2018)Carboxylated schizophyllan (“sclerox”) is a chemically modified polysaccharide obtained by partial periodate oxidation and subsequent chlorite oxidation of schizophyllan, a water-soluble neutral polysaccharide having a ... -
Effects of carboxylation of the side chains on the order-disorder transition in aqueous solution of schizophyllan, a triple helical polysaccharide
Yoshiba, Kazuto; Okamoto, Satoka; Dobashi, Toshiaki; Oku, Hiroyuki; Christensen, Bjørn E.; Sato, Takahiro (Journal article; Peer reviewed, 2017)Schizophyllan and scleroglucan are water-soluble polysaccharides having repeating units consisting of three β-1,3-linked glucose residues in the main chain and a single β-1,6-linked glucose residue as the side chain. This ... -
Order-Disorder Transition of Triple Helical -1,3-D-Glucans in Aqueous Mixtures of Dimethyl Sulfoxide and Imidazole: Schizophyllan and its Chemically Modified Derivatives
Yoshiba, Kazuto; Christensen, Bjørn Erik (Peer reviewed; Journal article, 2023)Schizophyllan is a high molecular weight β-1,3-D-glucan having three β-1,3-D-glucoses and one branched β-1,6-D-glucose in the repeating unit. It dissolves as a triple helix in aqueous solutions but exhibits two separate ... -
Single-chain conformation of carboxylated schizophyllan, a triple helical polysaccharide, in dilute alkaline aqueous solution
Tomifuji, Yu; Yoshiba, Kazuto; Christensen, Bjørn E.; Terao, Ken (Journal article; Peer reviewed, 2019)Synchrotron-radiation small-angle X-ray scattering measurements were carried out for a schizophyllan (SPG) sample with the weight-average molar mass Mw of 340 kg mol−1 and five carboxylated SPG (sclerox) samples with ...