發送短信 : Effects of chitosan and citric acid on pericarp browning and polyphenol oxidase activity of longan fruit

             ___     _____      _____    _    _   
    ___     / _ \\  |  __ \\   |  ___|| | \  / || 
   /   ||  | / \ || | |  \ ||  | ||__   |  \/  || 
  | [] ||  | \_/ || | |__/ ||  | ||__   | .  . || 
   \__ ||   \___//  |_____//   |_____|| |_|\/|_|| 
    -|_||   `---`    -----`    `-----`  `-`  `-`  
     `-`