www.bionity.com                       Information portal Biotechnology

www.bpsalliance.org                  Bioprocess Systems Alliance

www.chemeurope.com               Information portal Chemistry

www.chemicalprocessing.com    Information portal chemical processing

www.chemieonline.de                Chemistry

www.chemietechnik.de              Pharma+Food

www.coleparmer.com/techinfo/converters/converters.asp

                                               Link to convertion tables

www.druckgeraete-online.de      

www.machinebuilding.net          

www.pumpuniversity.com