Bright field TEM images of SSA prepared
by cryo-TEM showing (a)
a whole bacterium inside a wet SSA droplet (note: the image contrast
and brightness was adjusted to aid the observation of the cell, the
original image is shown in Figure S11),
(b) an intact diatom, (c) a virus particle, and (d) marine membrane
vesicles. The biological structures were identified according to their
size, shape, and morphology (see Supporting Information for more details). Yellow arrows indicate the edge of the SSA, the
red arrows indicate contamination from the cryo-TEM preparation, and
the green arrows indicate the biological particles.