Everyone, Per Mark Voorhis and Dave Lubleski Due to defective valve all ammonia gas will be shut down until further notice. Thank you for your patience for this time of shut down. Sheryl L. Willison Secretary Purdue University Birck Nanotechnology Center 1205 West State Street West Lafayette, IN 47907-2057 (765)494-7053 Fax: (765) 496-8383 http://www.nano.purdue.edu <http://www.nano.purdue.edu/>