Thank you for your helpful giving meaning of TEQ. Just to day I came across of word as i-TEQ again does it means something related to TEQ? What about "i"? Regards, Sittisak ++++++++++++++++++++++++++++++++++++ + Sittisak Pui-ock, HS5DRL + + Environmental Toxicology, + + Chulabhorn Research Institute + + Bangkok, Thailand 10210 + + http://www.cri.or.th/~sittisak + ++++++++++++++++++++++++++++++++++++