Abstract: An air circulation system includes at least one flow generator to generate an airflow, an air inlet, a first air outlet and a second air outlet each for exhausting airflow, an air conditioning device to air condition the exhausted airflow, and a controller. The controller is configured to position at least one of the first and second air outlets to be vertically separated from each other and to operate the flow generator to provide the exhaust airflow to the first and second air outlets. The exhaust airflow from the first and second air outlets are of different temperatures.

Abstract: The present disclosure relates to a composition for immune enhancement or gut health improvement, which is fermented with a composition for fermentation containing any one or more selected from a Leuconostoc mesenteroides CJLM119 strain or a culture thereof and contains any one or more selected from a culture of Leuconostoc mesenteroides CJLM119 strain, a lysate thereof, an extract thereof, or a component derived therefrom.