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Double Blasted Podcast Seminar

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by

Maggie Tang

on 12 February 2014

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Transcript of Double Blasted Podcast Seminar

DOUBLE BLASTED
By: Maggie, Tharshini, Abtin
August 6,
1945

What Happened?
-
Disastorus
atomic bomb, dropped by a
U.S aircraft
onto
Hiroshima

- Produced a
bright light
, then a big
roar

- Was picked up and threw across onto the ground,
unconscious
- Tsutomu Yamaguchi was a

29 year old

engineer
- On his way to work
- From
Hiroshima, Japan
Gamma Rays
- Intense, high-powered
x-rays
- Shot through skin, into
body & DNA
- Slammed & knocked
electrons
off
water molecules
(clustered around DNA)
- Tsutomu Yamaguchi -
innocent
civilian caught up in the event, spotted the
bomb
being dropped from a plane
BIBLIOGRAPHY
- August 9th
- Went back to home to
Nagasaki
- Another atomic
bomb
- Crawled over dead bodies to get to train station
After
- Tried to restart
normal
life with
family
- Lots of
health issues
: vomiting, hearing problems, etc
- Had 2 daughters- no
birth defects
- Tsutomu Yamaguchi
Nuclear

Bombs

How do they work?
Nuclear Bombs
nuclear
fission
a
subatomic particle
used
shot to a very dense
uranium core
hits the
nucleus
of a uranium atom
the nucleus becomes
unstable and splits
result:
+
energy

and
Where does the
energy
come from?
Energy
Mass
Speed of light
In other words,
mass
can be
converted
into
energy
!
Gamma rays
Question
Little Boy
, the bomb that was dropped over
Hiroshima
, contained
64kg
of
uranium
. The bomb pretty much destroyed the
whole city
. How much of the uranium do you think was converted into
energy
??
Answer:
about
0.0006kg
(0.6 grams)
The released
neutrons
collide with other
nuclei
The reaction continues, releasing large amounts of
energy
and
gamma rays
.
It stops when the
bomb
destroys itself

Nuclear Bombs
-
Died
in 2010 at the age of
93
More about
Gamma Rays
!
- Cannot be seen
- High
energy

light

particles
- Most
powerful
in the
electromagnetic spectrum
(even more powerful than x-rays)
- Emitted from
highly reactive atoms
or
celestial bodies
(ex. stars)
What Happens?
- Breaks
chemical bonds
- Knocks
electrons
off atoms producing
highly reactive
&
unstable
molecules
- Prevents or
mutates
cell replication, can lead to
cancer
Cancer
caused by
Ionization
-
Lung
Cancer
-
Breast
Cancer
-
Stomach
Cancer
-
Thyroid
Cancer
- Multiple
Myeloma
MINI QUIZ!~
1. What is
nuclear fission
?
2. Do you think
nuclear bombs
should be used?
3. What are
gamma rays
& where are they produced?
4. What do they do to
DNA
?
5. Can affeced genes be passed onto
future generations
?
- http://www.tofugu.com/2012/08/07/tsutomu-yamaguchi-the-guy-who-got-hit-by-an-atomic-bomb-twice/
- http://www.radiolab.org/story/223276-double-blasted/
- http://science.howstuffworks.com/nuclear-bomb.htm
- http://science.howstuffworks.com/nuclear-power1.htm
- http://science.hq.nasa.gov/kids/imagers/ems/gamma.html
- http://curiosity.discovery.com/question/gamma-rays-both-helpful-harmful
- http://www2.bio.ku.dk/isotopkursus/english/topics/Cases/case_biological_effect_ionizing_radiation.shtml
- http://www.usuhs.edu/afrri/outreach/ionizing.htm
- http://www.hko.gov.hk/education/dbcp/rad_health/eng/r2.htm
- http://www.cancer.org/cancer/cancercauses/othercarcinogens/medicaltreatments/radiation-exposure-and-cancer
- http://curiosity.discovery.com/question/genetic-mutation-passed-on
- http://www.aacr.org/home/survivors--advocates/educational-series-on-science-and-advocacy/scientists-on-science/scientists-on-science-basic-biology-and-cancer-page-8.aspx
- http://www.atomicarchive.com/Fission/Fission1.shtml
- http://en.wikipedia.org/wiki/Nuclear_weapon#Fission_weapons
- http://en.wikipedia.org/wiki/Little_Boy
- http://www.meditech.cn/meditech-edu/Xray-2.asp
- http://www.originalsmartypants.com/2013/05/18/e-mc2/
- http://io9.com/5948842/why-are-atomic-bomb-clouds-mushroom+shaped
- http://www.nature.com/scitable/definition/double-helix-277
- http://www.princeton.edu/~achaney/tmve/wiki100k/docs/DNA_ligase.html
Thank You!
MUTATIONS!
- Some
genetic mutations
can be passed onto
future generations
Germline Mutations
- starts in
germ cell
- alteration of the DNA of cells that are responsible for producing
eggs and sperm

- genetic mutation is passed on by
the parent to the child
- there is a
higher risk of cancer
- "
genetic anticipation
"
- when the mutation appears to be more
critical
on the future generation
Somatic Mutations
-
specialized cells
that can be developed into the
brain, eyes, fingers
, etc.
- are
not inheritable

• a
double stranded
DNA
molecule
• two linear strands that are
anti-parallel

• there are smaller units that forms the
chain

• called
nucleotides
,
base pairs

• specialized
enzyme
,
ligase
, repairs double-stranded DNA
• it joins the broken double strands together

Double Helix
Full transcript