أرسل هذا في رسالة قصيرة: Electrospun nanofibers with chemotactic concentration gradient for tissue engineering applications

  _____     _____     _____      ___     _    _   
 / ____||  |  ___||  /  ___||   / _ \\  | || | || 
/ //---`'  | ||__   | // __    | / \ || | || | || 
\ \\___    | ||__   | \\_\ ||  | \_/ || | \\_/ || 
 \_____||  |_____||  \____//    \___//   \____//  
  `----`   `-----`    `---`     `---`     `---`