A5101747885- Carbohydrate Chemistry and Synthesis
- Glycosylation and Glycoproteins Research
- Supramolecular Self-Assembly in Materials
- Wastewater Treatment and Nitrogen Removal
- Particle Accelerators and Free-Electron Lasers
- Click Chemistry and Applications
- Phosphorus and nutrient management
- Advanced biosensing and bioanalysis techniques
- Polydiacetylene-based materials and applications
- Conducting polymers and applications
- Particle accelerators and beam dynamics
- Chemical Synthesis and Analysis
- Advanced X-ray Imaging Techniques
- Porphyrin and Phthalocyanine Chemistry
- Carbon Nanotubes in Composites
- Mesoporous Materials and Catalysis
- Nanocluster Synthesis and Applications
- Superconducting Materials and Applications
- Hydrogels: synthesis, properties, applications
- Graphene and Nanomaterials Applications
- Graphene research and applications
- Analytical Chemistry and Chromatography
- Crystallography and Radiation Phenomena
- Odor and Emission Control Technologies
- Analytical Chemistry and Sensors
Toyo University
2010-2024
Ibaraki Prefectural Livestock Center
2013-2021
Chiba Prefectural Government
2021
National Livestock Breeding Center
2014-2017
Kitasato University
2017
Chiba Prefectural Agriculture and Forestry Research Center Forest Research Institute
2017
SPring-8
2016-2017
The University of Kitakyushu
2004-2007
Nara Institute of Science and Technology
2000-2007
Kyushu University
2003-2007
We have found that single-chain schizophyllan and curdlan (s-SPG s-curdlan, respectively) can dissolve as-grown cut single-walled carbon nanotubes (ag-SWNTs c-SWNTs, in aqueous solution. The vis−NIR spectra of the composites suggest c-SWNTs are dissolved as a bundle, whereas ag-SWNTs exist one or only few pieces tubular hollow constructed by helical structure inherent to these β-1,3-glucans. EDX CLSM measurements TEM observation established distribution map polysaccharides overlaps well with...
β-1,3-Glucan polysaccharides have triple-stranded helical structures whose sense and pitch are comparable to those of polynucleotides. We recently revealed that the β-1,3-glucans could interact with certain polynucleotides form macromolecular complexes consisting two polysaccharide-strands one polynucleotide-strand. This unique property has made it possible utilize these as potential carriers for various functional In paticular, cell-uptake efficiency resultant polysaccharide/polynucleotide...
Glycosylated poly(phenyl isocyanide)s were synthesized in an attempt to elucidate the effect of three-dimensionally regulated saccharide arrays along highly stereoregular polymer backbones on molecular recognition. Poly(phenyl substituted with α-d-glucose, β-d-glucose, β-d-galactose, and β-lactose obtained by polymerization corresponding acetylated glycosyl phenyl isocyanides a Ni(II) catalyst subsequent deacetylation. Helical main chains spatially demonstrated CD spectroscopy dynamics...
The topologically different structures in plasmid DNA can be successfully transcribed into silica by using the as a template for sol–gel polycondensation of tetraethoxysilane after treatment two cation-exchange steps (see scheme). These findings imply that ordered created from same through its higher-order conformational changes.
We here demonstrate the creation of novel poly(aniline) (PANI) nanofiber structures by a polymer wrapping method using schizophyllan (SPG). Mannose-modified SPG can also wrap PANIs to give nanofibers having lectin affinity. This interaction is applicable designing PANI/protein composites. The results establish that act as "host" assemble into one-dimensional superstructures.
Abstract We have found that s-SPG and curdlan are capable of wrapping SWNTs the “periodical” helical structure is created, reflecting nature SPG main-chain, on surface. The novel SWNTs/β-1,3-glucan composites were characterized by TEM AFM, which consistently support view these β-1,3-glucans wrap SWNTs, creating a higher-order structure.
Single-walled carbon nanotubes can be entrapped within a helical superstructure composed of schizophyllan bearing lactoside-appendages to show an excellent water-solubility as well specific lectin-affinity.
Forming an orderly line: Au nanoparticles can be aligned in one dimension by their incorporation into the helical structure of a natural polysaccharide, schizophyllan (s-SPG, see picture). The hydrophobic inner cavity helix hosts and aligns guests along its length (≈200 nm).
We succeeded in the quantitative and selective introduction of an ammonium cationic group into C6 position Curdlan (CUR) by "Click Chemistry", obtained (CUR-N+) showed good solubility water. ORD studies suggested that CUR-N+ adopts a single-stranded structure, different from right-handed, triple-stranded helical structure β-1,3-glucan polysaccharides It has been revealed polymeric complexes with guest molecules, such as polycytidylic acid (poly(C)), permethyldecasilane (PMDS), single-walled...
β-1,3-Glucans having carbohydrate-appendages (α-D-mannoside, N-acetyl-β-D-glucosaminide and β-lactoside) at the C6-position of every repeating unit can be readily prepared from curdlan (a linear β-1,3-glucan) through regioselective bromination/azidation to afford 6-azido-6-deoxycurdlan followed by chemo-selective Cu(I)-catalyzed [3 + 2]-cycloaddition with various carbohydrate modules a terminal alkyne. The resultant carbohydrate-appended curdlans interact polycytosine form stable...
We achieved stable operation of a free-electron laser (FEL) based on the self-amplified spontaneous-emission (SASE) scheme at SPring-8 Compact SASE Source (SCSS) test accelerator in extremely ultraviolet region. Saturation FEL power has been wavelengths ranging from 50 to 60 nm. The pulse energy reached $\ensuremath{\sim}30\text{ }\text{ }\ensuremath{\mu}\mathrm{J}$ observed fluctuation is about 10% (standard deviation) for several hours, which agrees with expectation theory showing...
Abstract β-1,3-Glucans having various functional appendages (lactoside, ferrocene, pyrene, etc.) can be prepared in an convenient, quantitative, and regioselective manner through chemo-selective [3 + 2]-cycloadditions between 6-azido-6-deoxy-curdlan modules with a terminal alkyne.
We have demonstrated that one-dimensional supramolecular dye assemblies with a uniform diameter can be created by utilizing schizophyllan (SPG) as host. In the nanofibers, molecules are assembled into different aggregation modes depending on preparation procedures. The findings establish SPG is useful for creating where temporal superstructures stabilized SPG-specific helical higher-order structure. [structure: see text].
b-1,4-Glucans having oligosaccharide appendages (O-/N-linked b-maltoside and O-/N-linked b-lactoside) at 6C positions of all repeating units can be readily prepared from cellulose through a two step strategy composed of: (1) regio-selective quantitative bromination/azidation to afford 6-azido-6-deoxycellulose; (2) the subsequent Cu+-catalyzed coupling with oligosaccharides terminal alkyne. The resultant derivatives showed improved water solubility in comparison native cellulose; they,...
We report an unexpectedly large flux loss observed in permanent magnets one of the undulators operated SACLA, x-ray free electron laser facility Japan. Characterizations individual extracted from relevant undulator have revealed that was caused by a homogeneous magnetization reversal extending over wide area, but not demagnetization damaged radiation. show estimated flux-loss rate is much higher than what reported previous papers, and its distribution more localized to upstream side. Results...
Die topologisch unterschiedlichen Strukturen von Plasmid-DNA in Silicatstrukturen umzusetzen gelingt, wenn die DNA als Templat für eine Sol-Gel-Polykondensation Tetraethoxysilan nach zwei Kationenaustauschschritten genutzt wird (siehe Schema). Aus diesen Befunden lässt sich folgern, dass geordneten mithilfe der Konformationsänderungen höherer Ordnung eines einzigen Templats erzeugt werden können. Supporting information for this article is available on the WWW under...
Schizophyllan can interact with permethyldecasilane to produce the corresponding decasilane-nanofiber, in which decasilane adopts helical conformations a tubular hollow created by superstructure of schizophyllan.
Abstract Schizophyllan binds 1,4-bis(p-amidophenyl)butadiyne and acts as a one-dimensional host to produce fibrous polydiacetylene assemblies through UV-irradiation.
Tris-bipyridine ferrous and ruthenium complexes carrying various saccharide appendages have been investigated to develop sensory systems for monitoring saccharide-binding phenomena. Ferrous O-glycoclusters having spacer moieties inserted between the complex core showed enhanced affinities lectins, but N-glycoclusters, in which saccharide-appendages are directly linked via amide linkage, had low lectin-affinities. Molecular dynamics calculation indicated that flexible densely packed clusters,...
Abstract We established a novel strategy to construct porphyrin-nanofibers which may mimic fibrous porphyrin-assembly observed in natural light harvesting system green bacterium. Our utilizes alignment of 5,10,15,20-tetrakis(4-carboxyphenyl)porphyrinatozinc acetate schizophyllan having one dimensional cavity along its helical superstructure. The resultant schizophyllan/porphyrin complex generates superstructures, porphyrins are aligned chirally-twisted packing mode.