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Study on Sulfur Cross-Linking of Isoprene Rubber via Dinuclear Bridging Bidentate Zinc/Stearate Complexes
Get PDF京都工芸繊維大学博士（工学）To reveal the sulfur cross-linking reaction of isoprene rubber, modern approaches such as synchrotron X-ray analysis and density functional theoretical (DFT) calculation were subjected. As a result, it was revealed that the dinuclear bridging bidentate zinc/stearate complexes play an important role in the sulfur cross-linking reaction of isoprene rubber
3d遷移金属添加AlN薄膜の結晶学的特性と電子状態に関する研究
Get PDF京都工芸繊維大学博士（工学）本論文では、窒化アルミニウム（AlN）に3d遷移金属添加（3dTM）を高濃度に添加することで起こる特異な電子状態と結晶学的配向変化を議論し、人工光合成用光電極、深紫外発光素子への応用の可能性について述べる
情報科学センターの平成を振り返る
Get PDF情報科学センターの歴史を「スタッフ、情報システム、情報ネットワーク」の３つの変遷としてまとめた。京都工芸繊維大学情報科学センター広報,No.38,2020.1,pp.20-35個人情報保護のため、文中の「（表２）スタッフの変遷」は掲載を見合わせております。悪しからずご了承ください
ある生物学者の40年ロマンス
Get PDF私は、これまで過去に自分が行った研究についてほとんど振り返ることがありませんでした。論文にまとめて学術雑誌に掲載されてしまうと、途端に次の研究（論文）に興味が移ってしまい、すでに論文になった研究への興味が失せてしまうのです。定年退職を前にして、今回初めて、過去に自分の出した論文に目を通してみると、過去の記憶が蘇り、研究生活をスタートしてから今日まで、まるで40年ロマンスであったように思います。本稿では、卒業研究に着手した頃から現在に至るまで、特に本学に赴任後の研究を中心に、私の40年ロマンスを振り返ってみます。京都工芸繊維大学 学術報告書,第１３巻,2020.12,pp.15-2
Studies on Effects of Coating Process Conditions on Structures and Properties of Pressure-Sensitive Adhesive Layers Composed of Di- and Tri-Block Copolymers
Get PDF京都工芸繊維大学博士（工学）I have revealed the effects of coating process conditions on structures and properties of pressure-sensitive adhesive layers composed of di- and tri-block copolymers forming spherical microdomains. Two different types of the coating process have been examined; the solution coating (by solvent evaporation from solutions) and the hot-melt coating (by solidification from melt). Although the latter solvent-free process is much preferred, the coated layer by this method has poorer mechanical properties. Since it is important to understand the structure-property relationship to improve their mechanical properties, I have conducted precise structural analyses by two-dimensional small-angle X-ray scattering measurements and by atomic force microscopy observations
Isolation and evaluation of anti-inflammatory constituents from lichen Dirinaria applanata and Lasia spinosa leaves
Get PDF京都工芸繊維大学博士（学術）Natural products or traditional medicines play essential roles in therapeutic agents as well as a resource for the discovery of new drugs. Lichen Dirinaria applanata and Lasia spinosa (L.) Thwaites were used as traditional medicines to treat many diseases for centuries. However, chemical components and their effects on inflammatory response are not yet characterized. Thus, the goal of this dissertation is to explore chemical positions and investigate the anti-inflammatory activities of these extracts in lipopolysaccharide (LPS)-induced RAW 264.7 macrophages. Chemical investigation of the lichen Dirinaria applanata methanol extract led to isolating two hopane derivatives including 1β-acetoxy-21α,3β-hydroxyhopane-29-oic acid (1), hopane-3β,6β,21α-triol (2) and a depside namely 2-O′-methylnordivaricatic acid (3). Their structures were elucidated by spectroscopic data in combination with published literature. Notably, compound 2 was isolated from this lichen species for the first time. Unfortunately, only compound 1 shows the anti-inflammatory effect by reducing nitric oxide (NO) production in LPS-induced inflammation response. Besides, ethanol extracts of L. spinosa leaves showed antioxidant activity due to the presence of high levels of polyphenolic compounds. Therefore, L. spinosa leaves may exhibit anti-inflammatory properties. In particular, treatment with the leaf extract significantly repressed the production of inflammatory mediators such as nitric oxide and reactive oxygen species and the expression of pro-inflammatory cytokines in the LPS-stimulated RAW264.7 cells. Moreover, pretreatment of L. spinosa leaf extract prevented activation of the nuclear factor-kappa B (NF-κB) pathway by inhibiting nuclear factor of kappa light polypeptide gene enhancer in B-cells inhibitor, alpha (IκBα) degradation. Furthermore, the mitogen-activated kinase (MAPK) and phosphoinositide-3-kinase/protein kinase B (PI3K/Akt) pathways were suppressed upon treatment with the leaf extract. In addition to suppressing inflammatory factors, the extract also promoted the activated nuclear factor erythroid 2-related factor 2/heme-oxygenase-1 (Nrf2/HO-1) pathway. Taken together, the significant findings of these herbs will be highlighted and discussed throughout this dissertation. Result obtained highlights critical findings in assessing the potential of anti-inflammatory constituents. Thereby, we propose to further develop them as novel pharmacological strategies in order to defeat inflammation diseases
数学特別講義１
Get PDF2020年9月14日から18日に行った東京理科大学集中講義（対象は学部4年生）の講義ノートである．行列の指数写像と対数，Lie環について準備した後，線形Lie群のLie環を定義する．ここのコンパクト線形Lie群の性質を調べ，典型的な等質空間の等質表示をした．学部4年生から大学院への数学の橋渡しになる講義を目指した
Rheology and Colloidal Gelation of Dense Suspensions of Thermo-Responsive Soft Microgels
Get PDF京都工芸繊維大学博士（工学）In the present thesis, the rheological properties and colloidal gelation behavior of temperature (T)-responsive soft microgel suspensions are investigated. In Chapter I, the basic introduction of the characteristics of T-responsive microgels, the viscoelasticity of their microgel suspensions, and the colloidal gelation phenomena is provided. In Chapter II, sample synthesize, preparation and experimental method used in this study are illustrated. The poly(N-isopropyl acrylamide) (denote as N) and poly(N-isopropyl methacrylamide) (denote as NM) microgels with various values of particle size and crosslink densities are employed in the experiments. In Chapter III, the elastic and flow properties of binary N/N microgel pastes with size and stiffness disparities are investigated. The effects of the size and stiffness disparities on elasticity, yield point, and steady-state flow properties are elucidated. The local fast dynamics of microgels is correlated to the characteristic time in the steady-state flow of the pastes. In Chapter IV, the yielding and flow properties of binary N/NM microgel pastes with chemically dissimilar surfaces are studied. We reveal that the contribution of the N-NM contacts to yield strain (γc) of the mixtures. We also show that large size disparity results in anomalies not only in the composition dependence of γc and modulus, but also in steady state flow behavior, due to the characteristic packing efficiency where small particles enter in the gap between large particles. In Chapter V, the formation criteria and viscoelasticity of colloidal gels are revealed for the N microgel suspensions. We examine how each of surface charge density, T and particle concentration affects the colloidal gelation, and elucidate the correlation between them. The rheological properties of the colloidal gels are revealed by large amplitude oscillatory shear, and long-term linear creep and recovery measurements. In Chapter VI, viscoelasticity and colloidal gelation of binary N/NM microgel suspensions with different transition T are investigated. We analyze the measured T-dependence of linear viscoelasticity by converting into the dependence on each particle volume fraction or the total particle volume fraction. This analysis elucidates the contribution of the packing effect to the viscoelasticity, and it also gives a clue to clarify the criterion for the onset gelation temperature. In Chapter VII, the important results of present thesis are concisely summarized
パイル織物の触感や物理特性に及ぼす水分の影響に関する研究
Get PDF京都工芸繊維大学博士（学術）パイル織物の構造、特にパイルの形状に焦点をあて、パイルが水に接触し、時間経過とともに変化する物性と触感の関係を明らかにし、触感との関係より、人間が感じる心地よさの要因を考察した