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Students activities in children’s cafeteria - Josai University Rotaract Club’s community activities -
Get PDF地域活動ノート / Notes 編集：城西大学・城西短期大学地域連携センター紀要編集委員
The Korean Healthcare System and Public Hospitals in Korea
Get PDF研究ノート / Research Notes 本稿は地方財務協会『公営企業 2023年 10月号』「韓国の公共病院訪問と日本の自治体病院制度との比較」をベースに，文在寅政権及び尹錫悦政権の医療政策など最新の情報を盛り込み加筆修正した研究ノートである
第十届 城西大学 中文演讲比赛
Get PDF日時：2024年10月26日(土)10：00～ オンラインで実施！ 世界へ届け、あなたの声 主催：城西大学スピーチコンテスト実行委員会 後援：埼玉県・坂戸市・坂戸市教育委員会・鶴ヶ島市・鶴ヶ島市教育委員会・テレ玉・毎日新聞社・埼玉新聞社・坂戸市商工会・西入間青年会議所・城西大学同窓会・城西大学父母講演会 協力：NPO法人埼玉県日本中国友好協会・HSK日本実施委員
Characterization, Preparation, and Promotion of Plant Growth of 1,3-Diphenylurea/β-Cyclodextrin Derivatives Inclusion Complexes
Get PDFThe study aimed to prepare inclusion complexes of 1,3-diphenylurea (DPU) with β-cyclodextrin (βCD) and 2-hydroxypropyl-β-cyclodextrin (HP-βCD) using a three-dimensional ground mixture (3DGM). Their physicochemical properties, intermolecular interactions, solubilities, and plant growth-promoting activities were investigated on broccoli sprouts. Phase-solubility diagrams indicated the stability constant (Ks) and complexation efficiency (CE) of βCD/DPU were found to be K1/1 = 250 M–1, CE = 2.48× 10–3. The Ks and CEs of HP-βCD/DPU were found to be K1/1 = 427 M–1, CE = 3.93 × 10–3 and K2/1 = 196 M–1, CE = 1.93 × 10–3 respectively. The powder X-ray diffraction results of 3DGM (βCD/DPU = 2/1, HP-βCD/DPU = 2/1) showed that the diffraction peaks originating from the DPU and βCD disappeared, indicating a halo pattern. Differential scanning calorimetry results showed an endothermic peak at 244 °C derived from the melting point of DPU, but the endothermic peak disappeared in the 3DGM (βCD/DPU = 2/1, HP-βCD/DPU = 2/1). Near-infrared absorption spectra showed peak shifts in 3DGM (βCD/DPU and HP-βCD/DPU) at the −CH and −NH groups of DPU and the −OH groups of βCDs and free water. In the dissolution test (after 5 min), the concentration of intact DPU was 0.083 μg/mL. However, the dissolution concentrations of DPU in the 3DGM (βCD/DPU = 1/1), 3DGM (βCD/DPU = 2/1), 3DGM (HP-βCD/DPU = 1/1), and 3DGM (HP-βCD/DPU = 2/1) were 3.27, 3.64, 5.70, and 7.03 μg/mL, respectively, indicating higher solubility than that of the intact DPU. Further, 1H–1H NOESY NMR spectroscopic measurements showed cross-peaks between H-A (7.32 ppm) and H-B (7.12 ppm) of DPU and H-6 (3.79 ppm) in the βCD cavity of the 3DGM (βCD/DPU = 2/1). A cross-peak was also observed among DPU H-A (7.32 ppm), H-B (7.11 ppm), and H-6 (3.78 ppm) in the βCD cavity. The results of the broccoli sprout cultivation experiment showed that 3DGM (βCD/DPU = 1/1), 3DGM (βCD/DPU = 2/1), 3DGM (HP-βCD/DPU = 1/1), and 3DGM (HP-βCD/DPU = 2/1) increased the stem thickness compared with that of the control group (DPU). These results indicated that the βCD/DPU and HP-βCD/DPU inclusion complexes were formed by the three-dimensional mixing and milling method, which enhanced the solubility and plant growth-promoting effects.This publication is licensed under CC-BY-NC-ND 4.0
