안녕하세요 프랑스과협입니다.
프랑스과협에서는 아래와 같이 온라인세미나를 실시하고자 합니다.
많은 참여를 부탁드립니다.
감사합니다.
 
프랑스과협 운영진
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  • Date: June 26 (Saturday), 2021, 20:00 ~ 22:00 PM (Paris Time)
  • Online Zoom link:  https://us02web.zoom.us/j/82108240071?pwd=cGQ3WFNhUnhVb0p2a3B0cVJhSjZMQT09
  • Presenters and topics
     1) Greeting and Introduction/moderator: Prof. Junbeum Kim (President of ASCOF)
     2) Presentation 1: CHO, Chang-woo, PhD (Grenoble High Magnetic Field Laboratory)
    Title: 극저온 실험 물리학의 역사, 그리고 초전도체

    1911년 Heike Kamerlingh-Onnes 교수의 초전도체 발견 이후 109년만인 2020년 10월, 드디어 상온 초전도체 (room-temperature superconductor)라는 벽이 마침내 무너졌다. 하지만, 발견된 상온 초전도체는 지구기압보다 약 260만배나 강한 초고압력(ultrahigh-pressure)상태에서만 존재가 확인되어, 상온이라는 상징성과 함께 그에 따른 한계도 동시에 보여주었다.
    사실, 초고압 상온 초전도체는 이론적으로 오래전부터 예측되었던 터라 이 실험의 성공은 기본적으로 실험 기술의 발전에 종속되어 있다고 말할 수 있다. 진보된 실험 기술로 난관을 극복하고자 하는 노력과는 별개로, 많은 초전도 연구자들은 아직도 완벽히 이해를 못하고 있는 초전도 생성 원리를 밝혀냄으로써 진정한 상온 초전도체에 도달할 수 있다고 믿고 있다. 이러한 선상에서, 온도(temperature)라는 물리적 변수는 여전히 초전도연구에서 가장 중요한 요인이다. 본 세미나에서는 극저온 실험 물리학의 발전사를 소개하고, 그 과정중 어떻게 초전도체가 세상에 나타나게 되었는지, 그리고 추가 초전도 원리를 밝히기 위한 최신 연구 중 일부를 간략히 설명하고자 한다.

    3) Presentation 2: Hwayoung Noh (Nutrition and Metabolism Branch, International Agency for Research on Cancer (IARC- WHO), France, Department of Cancer Prevention and Environment, INSERM U1296, Léon Bérard Cancer Center, France)
    Title: Diet, physical activity, and gut microbiota in Korean healthy adults
    Lifestyle factors including diet and physical activity may modulate the human gut microbiota, which in turn may affect the status of human health and disease. We, therefore, investigated the associations of Korean dietary patterns and physical activity with the taxonomic composition and diversity of gut microbiota respectively in 222 Korean adults aged 18-58 years in a cross-sectional study through an international collaboration between IARC-WHO and NAS-RDA. Gut microbiota taxonomic composition and diversity (α- and β-) data were obtained by 16S rRNA gene sequencing on DNA extracted from fecal samples. Habitual diet for the previous year was collected by a validated food frequency questionnaire. Specific dietary patterns associated with α-diversity were identified by reduced rank regression analysis. Enterotypes of gut microbiota were explored by principal coordinate analysis based on β-diversity. Physical activity intensity was calculated as metabolic equivalents (METs) based on the types and duration of physical activity collected using a self-reported questionnaire. A dietary pattern associated with higher α-diversity (HiαDP), high intake of fermented legumes, vegetables, and seaweeds, and low intake of non-alcoholic beverages, was positively associated with a higher Firmicutes/Bacteroidetes ratio (F/B ratio). Among enterotypes identified based on the β-diversity, the Ruminococcus enterotype was more adherent to the HiαDP. Among three physical activity groups (high, low, and sedentary) categorized by physical activity intensity, the high-intensity group had a higher F/B ratio and a higher α-diversity significantly compared to the sedentary group, especially in men, after adjustment for the HiαDP. We conclude that a plant- and fermented food-based dietary pattern and higher intensity of physical activity in Korean adults were associated with favorable gut microbiota. In a cross-sectional follow-up study, we are investigating the combined impact of lifestyle factors and gut microbiota on markers of metabolic health and cancer risk in Korean adults.