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[FELICE FRANKEL speaking]

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In this week's
discussion of video,

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we're going to show you
some interesting examples

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of other peoples' work.

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Now, remember that
the basics of still

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photography that
you've just learned

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all these previous weeks, apply
to making successful videos.

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For starters, we are
incredibly lucky to be

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able to show you some remarkable
videos from a project called

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"Beautiful Chemistry".

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Here's the website
with full credit.

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Now I encourage you
to see them all.

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I am quite sure they
will inspire you come up

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with your own amazing
videos, if your work requires

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video capturing
macro-level phenomena.

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Scientist Yan Liang, a
collaborator of mine,

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is the creator and
director of the project.

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We asked him to tell us a
little about his techniques

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for three of the videos.

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Welcome, Liang, to our class.

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[YAN LIANG speaking]

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Thank you, Felice.

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It's wonderful being
part of this course.

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I'd be happy to talk
about how we captured

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three particular phenomena.

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In this segment we're showing
metal displacement reactions.

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We dropped zinc metal
into different solutions

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and recorded the emergence
of beautiful structures

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of other metals such
as silver or lead.

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All reactions were
shot in real time

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and we sped them up during
editing in Final Cut Pro X.

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For example, one sort
of silver displacement

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was sped up 60 times, which
means one second of our video

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is one minute in real time.

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For light setup, we used
two large LED panels

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to light a cubic glass
container in which

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the reactions occurred.

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Typically, a black cloth
or a white plastic board

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was placed about one
foot behind the container

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as black or white background.

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And we shot reactions
in the front

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with a Panasonic GH4 camera
and 100mm macro lens.

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All the reactions were
shot in a normal lab

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with overhead
fluorescent lights.

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Because the LED panels
were so much brighter

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than the fluorescent lights,
we typically left them on.

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In this segment, we are
showing a few crystallization

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processes, including
crystallization

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of copper sulfate, sodium
thiosulfate crystallization,

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and two more.

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We chose crystallization
processes

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that are fast enough so that
we could shot in real time

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and speed them up in editing.

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We did not select
crystallization processes

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that could take hours or
days to form large crystals.

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For those, time-lapse
photography has to be used,

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and lighting and exposure have
to be carefully controlled

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to avoid flicker
in the final video.

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Finally, in this segment, we
are showing a few bubbling

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reactions, such as zinc metal
reacts with hydrochloride acid

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to form hydrogen bubbles.

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These reactions are
fast and we usually

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did not need to speed
them up in editing.

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Our light setup worked
well for bubbles.

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The white highlights on
the right and left sides

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of the bubbles are the
reflection of two light panels.

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These highlights gave bubbles
a very interesting look.