PM alcohol 8 1 27min Flashcards
is decomp ethyl alcohol equal to..
yes equal to bevarge alcohol
Factors affecting the rate of putrefaction
Ambient temperature
Humidity
Distribution and type of microorganisms
microorgainsm containimation
microbial contaimination occurs through braks in skin, but source can be endogenous
Intestinal bacteria penetrates intestinal walls after death
distributed thoughrout the body via hepatic portal vein and intestinal luymph system
body temp exceeds 5C
prevented by refridgeration of bodty
prediomate bacteria that makes ethyl alcohol PM
e. coli
PM ethyl alcohol formation at what concentration
Majority of cases attributed to pm synthesis did not have significant ethyl alcohol concentration <0.07g%
max
Maximal concentration produced PM
range :.22g%-.17g%
What other substances may cause formation of ethyl alcohol
Glucose, lactate, glycerol, amino acids, ribose, fatty acids
Zumwalt study purpose
Evaluated for degree of putrefaction
Designed of degree of putrefaction as mild, moderate or severe found to be inadequate
Subjective and not reproducible
ZUMWALT system
eight physical changes that may occur in putrefaction
Known by acronym “smell bad”
Skin slippage
Mummification
Changes in the eyes
Marbling
State of rigor mortis[limpiness]
Bloating
Purging of fluids [appalling effusion]
Discoloration
Statheropoulos
30 different compounds identified
o Aliphatic and aromatic hydrocarbons
o Oxygenated compounds [alcohols, aldehydes, and ketones]
o Organic sulfides
o Inorganic gases [CO2, CO, NH3, H2S]
Most prominent compounds
o EtOH, 2-propanone, dimethyl disulfide, methylbenzene, octane, 2-butanone,
methyl ethyl sulfide, dimethyl trisulfide, and o,m,p- xylenes
Vass
studied odor of decomposition of human remains
Detected either major classes of chemicals associated with burial decomp
o Ketones and aldehydes
o Amides and alcohols
o Halogenated compounds and sulfides
o Aliphatic/aromatic hydrocarbons and esters
478 specific volatile compounds [including CHCl3]
