Text this

Number:

Provider:

CAPTCHA:

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

Please enter what you see:

Text this: Oxygen coadsorption and reaction with potassium on MgO thin films grown on Ru(001)