The Experts below are selected from a list of 315 Experts worldwide ranked by ideXlab platform

Sheng-yang Wang - One of the best experts on this subject based on the ideXlab platform.

Cheng-chi Chen - One of the best experts on this subject based on the ideXlab platform.

Yueh-hsiung Kuo - One of the best experts on this subject based on the ideXlab platform.

Tadashi Ishii - One of the best experts on this subject based on the ideXlab platform.

  • Xyloglucan from xylem-differentiating zones of Cryptomeria japonica
    Phytochemistry, 1998
    Co-Authors: Koichi Kakegawa, Yusuke Edashige, Tadashi Ishii
    Abstract:

    Abstract Xyloglucan was isolated from xylem-differentiating zones of Cryptomeria japonica . Endo-1,4-β-glucanase digestion of the xyloglucan gave a series of oligosaccharides. These oligosaccharides were purified by gel permeation chromatography and normal-phase HPLC. Glycosyl-residue composition and glycosyl-linkage composition analyses, 1 H NMR spectroscopy and FAB-mass spectrometry of the oligosaccharides showed that the xyloglucan was composed of five kinds of oligosaccharide. These oligosaccharides are commonly found in xyloglucan from dicot plants and are characterized as XXXG, XXLG, XXFG, XLLG and XLFG. These results suggest that xyloglucan from gymnosperms has similar structure to that of dicots.

  • Rhamnogalacturonan I from xylem differentiating zones of Cryptomeria japonica
    Carbohydrate Research, 1997
    Co-Authors: Yusuke Edashige, Tadashi Ishii
    Abstract:

    Abstract Rhamnogalacturonan I (RG-I) was isolated from the pectin of the cell wall of xylem differentiating zones of sugi (Cryptomeria japonica D. Don, gymnosperm) by digesting with endo-α-1,4-polygalacturonase followed by gel-permeation chromatography. Structure of RG-1 was characterized by glycosyl composition and glycosyl linkage analyses, partial acid hydrolysis, and lithium (Li)-treatment in ethylenediamine. The oligosaccharides produced by partial acid hydrolysis showed the backbone of RG-I to be a disaccharide repeating unit of → 4)-α- d -Gal p A-(1 → 2)-α- l -Rha p- (1 → . Arabinan and oligogalactosyl side chains were attached at O-4 of rhamnosyl residues of the backbone. Glycosyl composition and glycosyl linkage analyses suggested that the structures and/or the distribution of the arabinan sidechains of sugi RG-I were different from those of sycamore (angiosperm) RG-I. The backbone of sugi (Cryptomeria japonica D. Don, gymnosperm) rhamnogalacturonan I (RG-I) comprises a disaccharide repeating unit → 4)-α- d -Gal p A -(1 → 2)-α- l -Rha p-(1 → . Arabinan and oligogalactosyl sidechainds are attached at O-4 of rhamnosyl residues of the backbones.

Kazuhiko Fukushima - One of the best experts on this subject based on the ideXlab platform.

  • Decontamination of Cs from Japanese cedar (Cryptomeria japonica) via kraft cooking
    Journal of Wood Science, 2017
    Co-Authors: Wei Wang, Rie Tomioka, Dan Aoki, Kazuya Iizuka, Kazuhiko Fukushima, Yasuyuki Matsushita, Chisato Takenaka
    Abstract:

    To investigate the possibility of decontaminating ^137Cs-contaminated Cryptomeria japonica wood, kraft pulping was conducted and the Cs behavior in the reaction process was examined. ^133Cs-treated or ^137Cs-contaminated bark, sapwood, and heartwood chips of Cryptomeria japonica were digested using an aqueous solution of NaOH and Na_2S. The pulp was washed with ultrapure water and filtered, after which the filtrate (black liquor) was collected. The black liquor was acidified to separate the supernatant and precipitation. The Cs (^133Cs and ^137Cs) concentrations in the chip and reaction products were measured. As for wood samples, the majority of Cs was present in black liquor, while only a minor amount of Cs was retained in the pulp (

  • Translocation of 133Cs administered to Cryptomeria japonica wood
    Science of The Total Environment, 2017
    Co-Authors: Dan Aoki, Rie Tomioka, Yasuyuki Matsushita, Ryutaro Asai, Hiroyuki Asakura, Masao Tabuchi, Kazuhiko Fukushima
    Abstract:

    To reveal the in planta behaviour of caesium (Cs), the stable isotope 133Cs was administered into 3-year-old Cryptomeria japonica seedlings by the application of 133CsCl aqueous solution to the bark surface. The administered 133Cs was quantified by ICP-MS measurements, which showed transportation of 133Cs in an ascending direction in the stem. Distribution of 133Cs was visualized using freeze-fixed C. japonica woody stem samples and cryo-time-of-flight secondary ion mass spectrometry/scanning electron microscopy (cryo-TOF-SIMS/SEM) analysis. Cryo-TOF-SIMS/SEM visualization suggested that 133Cs was rapidly transported radially by ray parenchyma cells followed by axial transportation by pith and axial parenchyma cells. Adsorption experiments using powdered C. japonica wood samples and X-ray absorption fine structure (XAFS) analysis suggested that 133Cs was in the hydrated state following its deposition into tracheid cell walls.

  • Clonal variation in heartwood norlignans of Cryptomeria japonica: evidence for independent control of agatharesinol and sequirin C biosynthesis
    Annals of Forest Science, 2011
    Co-Authors: Nobumasa Bito, Kazuhiko Fukushima, Yasuyuki Matsushita, Ryogo Nakada, Eitaro Fukatsu, Takanori Imai
    Abstract:

    • Introduction In Cryptomeria japonica, heartwood properties are considered to be affected by specific extractives. It remains unclear whether traits of specific heartwood compounds are under genetic control.