Scientific, research, navigation, surveying, photographic, cinematographic, audiovisual, optical, weighing, measuring, signaling, detecting, testing, checking, supervision, life-saving and teaching apparatus and instruments, namely, electrodes for laboratory research, petri dishes used in laboratory research, probes for scientific purposes, sample preparation kits for prokaryotic and eukaryotic cells comprised of cell and bacterial culture dishes, cell and bacterial culture flasks, microelec...