Pollen in Domestic Dwellings: Forensic Implications
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Transcript of Pollen in Domestic Dwellings: Forensic Implications
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Pollen in Domestic Dwellings: Forensic Implications
Morgan, R. M., Allen, E., Balestri, F., Davies, G., King, T., Sena V. and Bull, P. A.
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Outline
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Role of experimental studies
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Experiment 1: Pollen within a room
Morgan, R. M., Allen, E., Lightowler, Z. L., Freudiger-Bonzon, J. and Bull, P. A. 2008 A forensic geoscience framework and practice. Policing: A Journal of Policy and Practice 2: 185-195
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Morgan, R. M., Allen, E., Lightowler, Z. L., Freudiger-Bonzon, J. and Bull, P. A. 2008 A forensic geoscience framework and practice. Policing: A Journal of Policy and Practice 2: 185-195
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Pollen in a room – scenario 2
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Figure 4.4.7.a. Graph to show persistence of pollen after removal of pollen source
Run Three
Run Four
Run Five
Run Six
Days since flowers' removal
Num
ber o
f pol
len
grai
ns sa
mpl
ed th
roug
ht th
e
room
-spa
ce
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0 5 10 15 200%
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Figure 4.4.7.b. Decay in pollen count after flowers removed from room
Run Three
Run Four
Run Five
Run Six
Days since flowers' removal
Polle
n co
unt (
% o
f pol
len
coun
t on
day
of fl
ower
re
mov
al)
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Grass Tulip (Tulippa)
Fuchsia(Thalia)
Oak (Quercus)
Pine(Pinus)
Run one 0 0 0 0 0
Run two 0 0 0 0 0
Run three 196 0 0 0 0
Run four 504 1 0 7 0
Run five 739 0 1 1 12
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Findings
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Experiment 2: Pollen on ink and paper
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Findings
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Experiment 3: Pollen preservation in heat and fire
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Time (sec)
Tem
pera
ture
(ºC
)
Floor (0.15m)Mid-Height (1.37m)Ceiling (2.26m)
Putori Jr, A.D. and McElroy, J. (2000) ‘Full-Scale House Fire Experiment for InterFIRE VR’, Report of Test, Published by U.S. Department of Commerce, National Institute of Standards and Technology.
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Lilium
Tulipa
Narcissus
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5 10 15 30Exposure Time (minutes)
Tempe
rature (º
C)
Lilly
Daffodil
Tulip
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Findings
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Implications