Could I request some transparent logos please?

http://www.chromforum.org/

the "wizard" in http://www.lcresources.com/resources/TSWiz/

http://www.passwird.com/

the "HPLC Troubleshooter" in http://www.chromacademy.com/hplc_troubleshooting.html

http://www.kronos.com/

http://www.hplccolumns.org/

Thank you very much!