This study aims to determine the effect of polishing speed and time on the microstructure and hardness of AISI 304 type stainless steel material that has gone through the Shielded Metal Arc Welding (SMAW) method welding process. The main focus of this research is to evaluate how polishing parameters affect surface quality, microstructure appearzmce, and hardness values in the fusion zone, fusio…
The method of preserving duck eggs by soaking water hyacinth leaf extract at a concentration of 40% with different soaking times has the potential to maintain the quality of duck eggs. This research aims to test the effectiveness of water hyacinth leaf extract in extending shelf life and inhibiting microbial growth in duck eggs. This research was carried out from September to October 2023 at th…