Laboratory apparatus and instruments, namely, homogenizers, pre-packed columns for use in separation and purification; retorts for use in high temperature chemical reactions for laboratory use; laboratory trays; test tubes; apparatus and instruments for physics for weighing, electrophoresis and mass spectrometry, homogenizers; laboratory pipettes; chemistry apparatus and instruments, namely, homogenizers; incubators for bacteria culture; distillation apparatus for scientific purposes; DNA chi...