3974531 EFTEM energy-filtered transmission electron microscopy 115 3974534 EFTEM energy-filtered TEM 39 3974535 EFTEM energy-filtered electron microscopy 3 3974539 EFTEM energy-filtered imaging 2 3974540 EFTEM cryo-energy filtered TEM 1 3974538 EFTEM energy filtered mode 1 3974537 EFTEM energy filtered transmission microscopy 1 3974536 EFTEM energy filtering of the images in the transmission electron microscope 1 3974533 EFTEM energy-filtered images in a TEM 1 3974532 EFTEM energy-filtered microscopy 1 3974530 EFTEM equipped with an imaging filter 1