title: Chemometric analysis with near-infrared spectroscopy for chemically pretreated Erianthus toward efficient bioethanol production.
abstract: In this paper, we report the combination of a near-infrared (NIR) spectroscopic method with multivariate analysis in order to develop a calibration model of the saccharification ratio of chemically pretreated Erianthus. The regression models clearly depend on the NIR spectral regions, and the information of CH and aromatic framework vibrations contributed most effectively to the alkaline dataset. From interpretations of the regression coefficient, lignin and cellulose were negatively and positively correlated with the saccharification ratio, respectively, and this result was supported by the data from wet chemical analysis. A more complex dataset was obtained from varied chemical pretreatments; here, the saccharification ratio was either small or had no linear correlation with each structural monocomponent. These results enabled the successful construction of the PLS regression model. NIR spectroscopy can be a rapid screening method for the saccharification ratio, and furthermore, can provide information of the key factors influencing the realization of more efficient enzymatic accessibility.
authors: Research Institute for Sustainable Humanosphere, Kyoto University, Uji, Kyoto 611-0011, Japan. yhorikawa@rish.kyoto-u.ac.jp
authors: Yoshiki
authors: Y
authors: Horikawa
authors: Tomoya
authors: T
authors: Imai
authors: Rie
authors: R
authors: Takada
authors: Takashi
authors: T
authors: Watanabe
authors: Keiji
authors: K
authors: Takabe
authors: Yoshinori
authors: Y
authors: Kobayashi
authors: Junji
authors: J
authors: Sugiyama
mesh_terms: D000468:Alkalies / Q000737:chemistry; D056804:Biofuels; D002138:Calibration; D002482:Cellulose / Q000737:chemistry*; D000431:Ethanol / Q000737:chemistry*; D008031:Lignin / Q000737:chemistry*; D008956:Models, Chemical; D015999:Multivariate Analysis; D010944:Plants / Q000737:chemistry; D019265:Spectroscopy, Near-Infrared / Q000379:methods*; D013464:Sulfuric Acids / Q000737:chemistry; D014934:Wood / Q000737:chemistry*
chemical_list: D000468:Alkalies; D056804:Biofuels; D013464:Sulfuric Acids; D000431:Ethanol; D002482:Cellulose; D008031:Lignin; C033158:sulfuric acid