Open Library Archives of Kagawa University (OLIVE)
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Endoscopic findings among healthy adults with asymptomatic norovirus infection in Japan: A single-center cross-sectional study
Get PDF香川大学Kagawa University博士（医学）Introduction: Norovirus infection, a major cause of acute viral gastroenteritis, is commonly reported during the winter season. Norovirus invades the upper intestinal tract, causing inflammation. In severe cases, endoscopic findings and complications, including duodenal perforation, have been reported. However endoscopic findings in patients with asymptomatic infections have rarely been reported. Therefore, this study aimed to investigate the upper endoscopic findings of patients with asymptomatic norovirus infection.Methods: Healthy adults (aged ≥18 years) who participated in voluntary health examinations between February 2017 and January 2018 were recruited twice a week. Only the individuals who had undergone esophagogastroduodenoscopy (EGD) were included. The primary outcome measure was the presence of any gross findings of EGD.Results: The norovirus genogroup I (GI)-positive group had more duodenal scarring than the norovirus negative group (16.3 % vs 5.9 %, respectively). After adjustment for age category, sex, and alcohol consumption status, duodenal ulcer scarring exhibited a significant association with GI-positive status (adjusted odds ratio: 3.11; 95 % confidence interval: 1.42-6.82; p = 0.005, Bonferroni-corrected, p = 0.015).Conclusions: Healthy adults with asymptomatic norovirus (GI-positive) infection showed predominantly more duodenal ulcer scarring than the norovirus-negative group on EGD.doctoral thesi
Modified scattering operator for nonlinear Schrödinger equations with time-decaying harmonic potentials
No full textThis paper is concerned with nonlinear Schrödinger equations with a time-decaying harmonic potential. The nonlinearity is gauge-invariant of the long-range critical order. In Kawamoto and Muramatsu (2021) and Kawamoto (2021), it is proved that the equation admits a nontrivial solution that behaves like a free solution with a logarithmic phase correction in the frameworks of both the final state problem and the initial value problem. Furthermore, a modified scattering operator has been established in the case without the potential in Hayashi and Naumkin (2006). In this paper, we construct a modified scattering operator for our equation by utilizing a generator of the Galilean transformation. Moreover, we remove a restriction for the coefficient of the potential which is required in Kawamoto (2021).journal articl
Ⅰ．インターナショナルオフィス全体に関わる報告
Get PDF１．インターナショナルオフィス２．香川大学の国際化の基本方針と重点戦略課題３．2024年度インターナショナルオフィス年間行事（2024年４月～2025年３月）４．学長・インターナショナルオフィス長表敬訪問及び協定締結・更新関連行事５． さくらサイエンスプログラム招へい事業・科学技術体験コース
「ジオから学ぶ瀬戸内の産業と文化」実施６．インターナショナルウィーク７．留学生のつどい８．グローバル・インスピレーション・イニシアティブ開催９． 学内連携教育プログラムの実施：『さぬきの地形と食文化から学ぶ地域の魅力創生～さぬきジオ・ガストロノミー国際共修プログラム～』10．独立行政法人国際協力機構（JICA）との連携11．留学生宿舎articl
Growth of harmful diatom under an intermittent nutrient supply that assumed fertilization for enclosed Pyropia cultivation, using a Kagawa-style “nori skirt” enclosure fence
Get PDFDiatom growth under an intermittent nutrient supply was investigated. It was known that cultured Nori（Pyropia yezoensis）could be prevented from bleaching under high nutrient concentration of only 60 to 120 minutes. Our new fertilization method by using a Kagawa-style “Nori skirt” maintained NH4+ concentration in the surface seawater at a high level for 60 to 120 minutes and actually this system could save the color of Nori. However, it is feared that diatom bloom occurs in response to the fertilization. We conducted a laboratory experiment to examine whether the large diatom, Eucampia zodiacus, which often grow at low temperature, and Nori culture season could grow under an intermittent nutrient supply. We found that the growth rate of E. zodiacus did not accelerate under 100 μM NH4Cl concentration for 60 or 120 minutes every day, and the results indicated no acceleration of diatom growth in response to an intermittent nutrient supply by our fertilization for Nori culture.departmental bulletin pape
The Effects of Implementing Nature Games in Life Environment Studies Teaching Methods on Students in Teacher Training Programs
Get PDF本研究では，教員養成課程を有する大学の生活科教育法の授業において，自然体験活動の一つであるネイチャーゲームを実施した後の学生の自然環境や指導に関する効果を明らかにすることを目的とする。授業前後に質問紙調査を実施した結果，以下の知見が得られた。第一に，授業後において学生の自然環境への関心が向上したことが示された。第二に，自然体験活動の指導に対する不安が軽減したことが明らかになった。本研究の概要の一部について令和６年度（2024年度）の一般社団法人日本理科教育学会四国支部大会（香川大学）において発表した（研究発表要旨集：41号26-27）。departmental bulletin pape
Satisfaction and Reflections of Japanese University Students on their Pre-university English Education
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Prevalence and factors related to hypouricemia and hyperuricemia in schoolchildren: results of a large-scale cross-sectional population-based study conducted in Japan
Get PDF香川大学Kagawa University博士（医学）Hypouricemia in children including renal hypouricemia, which is a major cause of exercise-induced acute renal injury (EIAKI), is an important clinical problem, in addition to hyperuricemia. However, no large-scale studies of serum uric acid (UA) concentrations in the general pre-adolescent population have been carried out. We conducted a population-based cross-sectional study to measure the prevalences of hypouricemia and hyperuricemia and identify the associated factors. We analyzed 31,822 (16,205 boys and 15,617 girls) 9-10-year-old children who underwent pediatric health check-ups in Kagawa prefecture between 2014 and 2018. Hypouricemia and hyperuricemia were defined using serum UA concentrations of ≤ 2.0 mg/dL and ≥ 6.0 mg/dL, respectively. The prevalence of hypouricemia was 0.38% in both 9- and 10-year-old boys and girls, and was not significantly associated with age, sex, or environmental factors, including overweight. The prevalence of hyperuricemia was significantly higher in boys (2.7%) than in girls (1.9%), and was significantly associated with age, overweight, future diabetes risk, hypertriglyceridemia, low high-density lipoprotein-cholesterol, and liver damage, but not with high low-density lipoprotein cholesterol. Therefore, some pre-adolescent children in the general population in Japan showed hypouricemia. A means of identifying children with hypouricemia and lifestyle guidance measures for the prevention of EIAKI should be established.doctoral thesi