Abstract: Provided are a method and a system for expanding a unit placement space in a game. A unit placement space expanding method may provide a user with a function capable of arbitrarily expanding a limited space in which units are placeable in a game using resources provided from the game, and may allow users to place a unit through a secured space only when a unit placement space is secured in advance. Accordingly the users may expand a space by strategically placing units and entertain strategic advantages during the game.

Abstract: Provided are a method and a system for expanding a unit placement space in a game. A unit placement space expanding method may provide a user with a function capable of arbitrarily expanding a limited space in which units are placeable in a game using resources provided from the game, and may allow users to place a unit through a secured space only when a unit placement space is secured in advance. Accordingly the users may expand a space by strategically placing units and entertain strategic advantages during the game.

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.

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.