Abstract: The present invention relates to a hyaluronic acid-based hydrogel which is a hyaluronic acid-peptide crosslinked body crosslinked using a peptide crosslinking agent. More specifically, the present invention relates to a hyaluronic acid-based hydrogel and a method for producing same, wherein a crosslinked body having novel physical properties is obtained using a relatively small amount of a crosslinking agent that forms peptide bonds, unlike conventional crosslinking agents, and the hyaluronic acid-based hydrogel has the advantages of: being safe and having few side effects; the physical properties of a filler being adjustable according to the amount of peptide crosslinking; and having a high elasticity ratio.

Abstract: Provided are a metal alloy and more particularly, to an aluminum alloy used for electrical, electronic, and mechanical components, and an aluminum alloy casting manufactured using the aluminum alloy. The aluminum alloy according to an embodiment includes 4 to 13 wt % of silicon (Si), 1 to 5 wt % of copper (Cu), 26 wt % or more and less than 40 wt % of zinc (Zn), and a balance being aluminum (Al) and unavoidable impurities.