Tomoko Matsuda
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View article: Stress-Relieving Effects of Green Tea Depend on the Ratio of Its Special Ingredients and the Infusion Conditions
Stress-Relieving Effects of Green Tea Depend on the Ratio of Its Special Ingredients and the Infusion Conditions Open
Theanine, an amino acid unique to tea leaves, has been reported to exhibit stress-relieving effects. However, the stress-relieving effects of theanine (T) are greatly inhibited by caffeine (C) and epigallocatechin gallate (E), the main com…
View article: Substrate Promiscuity of <i>Thermoplasma acidophilum</i> Malic Enzyme for CO<sub>2</sub> Fixation Reaction
Substrate Promiscuity of <i>Thermoplasma acidophilum</i> Malic Enzyme for CO<sub>2</sub> Fixation Reaction Open
CO2 fixation technology has gained attention as a method to effectively utilize the abundant CO2 in the atmosphere by converting it into useful chemicals. However, since CO2 is a highly stable molecule, many of the currently developed meth…
View article: Microstructural Ductile Fracture Analysis of 1180-MPa Class Martensite-matrix Dual-phase Steel via <i>in situ</i> Tensile Test
Microstructural Ductile Fracture Analysis of 1180-MPa Class Martensite-matrix Dual-phase Steel via <i>in situ</i> Tensile Test Open
Martensite-matrix dual-phase (DP) steel is increasingly used for high-strength automobile parts owing to its excellent compatibility, ductility, and tensile strength. However, its higher fracture strain, reflected by the hole expansion rat…
View article: Microstructural Ductile Fracture Analysis of 1180-MPa Class Martensite-Matrix Dual-phase Steel via in-situ Tensile Test
Microstructural Ductile Fracture Analysis of 1180-MPa Class Martensite-Matrix Dual-phase Steel via in-situ Tensile Test Open
Martensite-matrix dual-phase (DP) steel is increasingly used for high-strength automobile parts owing to its excellent compatibility, ductility, and tensile strength. However, its higher fracture strain, reflected by the hole expansion rat…
View article: Immobilization of Baeyer-Villiger monooxygenase from acetone grown Fusarium sp.
Immobilization of Baeyer-Villiger monooxygenase from acetone grown Fusarium sp. Open
ObjectiveA novel biocatalyst for Baeyer–Villiger oxidations is necessary for pharmaceutical and chemical industries, so this study aims to find a Baeyer–Villiger monooxygenase (BVMO) and to improve its stability by immobilization. ResultsA…
View article: Patterns of reproductive isolation in a haplodiploid mite, Amphitetranychus viennensis: prezygotic isolation, hybrid inviability and hybrid sterility
Patterns of reproductive isolation in a haplodiploid mite, Amphitetranychus viennensis: prezygotic isolation, hybrid inviability and hybrid sterility Open
Background Evolution of reproductive isolation is an important process, generating biodiversity and driving speciation. To better understand this process, it is necessary to investigate factors underlying reproductive isolation through var…
View article: Development of a New Approach to Estimate the In-mouth Release Characteristics of Odorants in Drinks
Development of a New Approach to Estimate the In-mouth Release Characteristics of Odorants in Drinks Open
R-FISSにて算出したコーヒー飲料飲用時のレトロネーザルアロマに含まれる香気成分の定量値比は，各香気成分が特有の値を示した．この定量値比は，10呼吸分の定量値を最初の1呼吸目の定量値で除した値であることから，その大小は香気成分の発現速度（フレーバーリリース特性）を示すことが予想される．そこで，R-FISSにおける定量値比の大小と，レトロネーザルアロマの時間変化の関係をリアルタイム測定にて調べた結果，定量値比の小さい成分は飲用後速やかに減少し，定量値の大きい成分は飲用後長時…
View article: Organic–inorganic nanocrystal reductase to promote green asymmetric synthesis
Organic–inorganic nanocrystal reductase to promote green asymmetric synthesis Open
Geotrichum candidum acetophenone reductase (GcAPRD) nanocrystal reduces broad kinds of ketones to their corresponding (S)-alcohols with excellent enantioselectivity.
View article: Modulating Biocatalytic Activity toward Sterically Bulky Substrates in CO<sub>2</sub>-Expanded Biobased Liquids by Tuning the Physicochemical Properties
Modulating Biocatalytic Activity toward Sterically Bulky Substrates in CO<sub>2</sub>-Expanded Biobased Liquids by Tuning the Physicochemical Properties Open
The study of CO2-expanded liquids using a green component such as a bio-based solvent has been recently raised as a new concept for an alternative solvent, and yet been largely unexplored in literature for neither fundamental nor applicati…
View article: A New Shading Method for Improving Free Amino Acid Content and Yield of ‘Yabukita’ Kabuse-cha
A New Shading Method for Improving Free Amino Acid Content and Yield of ‘Yabukita’ Kabuse-cha Open
本研究では，茶品質の指標の一つである遊離アミノ酸含有量に着目し，収量を確保しつつ遊離アミノ酸含有量の高い荒茶を生産する被覆方法の開発を目指した。そこで，遊離アミノ酸含有量は遮光開始から5日後までの増加が顕著であること，遮光による生育の抑制は5日程度であればほぼ影響がないことに着目し，85％遮光9日間，98％遮光5日間の二段階遮光という被覆方法を考案した。‘やぶきた’において本遮光方法を検証した結果，かぶせ茶慣行の85％遮光と比較して，収量は同等で，かつ遊離アミノ酸含有量を1…
View article: Theagalloflavic Acid, a New Pigment Derived from Hexahydroxydiphenoyl Group, and Lignan Oxidation Products Produced by Aerobic Microbial Fermentation of Green Tea
Theagalloflavic Acid, a New Pigment Derived from Hexahydroxydiphenoyl Group, and Lignan Oxidation Products Produced by Aerobic Microbial Fermentation of Green Tea Open
Chinese ripe pu-erh tea is produced by aerobic microbial fermentation of green tea. To clarify the microbial degradation of tea polyphenols, Japanese commercial green tea was mixed with Chinese ripe pu-erh tea, which retains microorganisms…
View article: Crystallization and preliminary crystallographic analysis of acetophenone reductase from<i>Geotrichum candidum</i>NBRC 4597
Crystallization and preliminary crystallographic analysis of acetophenone reductase from<i>Geotrichum candidum</i>NBRC 4597 Open
Acetophenone reductase (APRD) from Geotrichum candidium NBRC 4597 was crystallized by the hanging-drop vapour-diffusion method using PEG 3350 as a precipitant. The crystal belonged to space group P 6 5 22, with unit-cell parameters a = b =…