Abstract: The present invention relates to a device for imaging and diagnosing the condition of obstruction of the upper airway, which can image the condition of a change in the upper airway of an OSAS patient occurring during natural sleep by using EIT and can extract information required for diagnosis. The device for imaging and diagnosing the condition of obstruction of the upper airway by using EIT according to the present invention does not require high costs, enables repeated examination to be conducted without the risk of exposure to radioactive rays, and enables examination to be performed over a prolonged period of time in an actual natural sleep state, thereby accurately diagnosing the condition of obstruction of the upper airway.

Abstract: Disclosed relates to a novel chalcone derivative, pharmaceutically acceptable salt thereof, a method for preparing the same and uses thereof, the chalcone derivative being readily obtained through the steps of: reacting aminoacetophenone with sulfonylchloride under the presence of an appropriate salt; and reacting the compound prepared in the above step with hydroxybenzaldehide under the presence of an appropriate catalyst. The chalcone derivative of formula 1 in accordance with the present invention having strong enzyme inhibitory activities for glycosidase can be effectively used in preventing and treating various diseases induced by glycosidase, and the chalcone derivative of the invention having tyrosinase and melanin synthesis inhibitory activities can be effectively used as a skin-whitening compound.