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Social and Behavioral Sciences Commons™
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Articles 1 - 3 of 3
Full-Text Articles in Social and Behavioral Sciences
Prevalence Of Non-Self Dna On Three Different Sebaceous Skin Locations, Jan Kirstine Zamora
Prevalence Of Non-Self Dna On Three Different Sebaceous Skin Locations, Jan Kirstine Zamora
Student Theses
This project serves to provide additional information on the prevalence of non-self DNA on the exposed skin locations specifically the inner upper arm, the nape area of the neck and the neck area just below the ear, where current literature is lacking. Skin tape lifts from these locations were collected from 15 male participants and 13 female participants once a week over a period of three weeks. Only single source profiles were obtained from six volunteers. Eight volunteers had only one mixture DNA profile in nine samples, while mixture DNA profiles for at least two collection occasions were observed in …
Evaluating A Test For Shedding Propensity Using Tape Lifts From Different Skin Locations, Xiao M. Chen
Evaluating A Test For Shedding Propensity Using Tape Lifts From Different Skin Locations, Xiao M. Chen
Student Theses
The shedding propensity of a person can assist data interpretation in casework when assessing the possibility of passive transfer for DNA analysis. Past studies on shedding propensity evaluated palmar skin (washed and unwashed) deposits. This study compared different skin locations with respect to shedding propensity, and explored the potential of tape-lifts as a skin surface collection method. Eight different skin types and samples were collected with adhesive tape disks from 28 participants over three non-consecutive days; the washed and unwashed fingers from both hands, toe, and arm, neck below ear, and nape. Samples were extracted, quantified, amplified, genotyped, and evaluated …
Determination Of Human Shedding Propensity Based On Str Results, Genevieve Trapani
Determination Of Human Shedding Propensity Based On Str Results, Genevieve Trapani
Student Theses
Trace DNA evidence may be discovered at a crime scene after having been deposited by a person of interest via active or passive transfer. Based on previous studies, passive transfer of one’s DNA is influenced by their shedding propensity, or probability of depositing a detectable amount of DNA through touch. Determining the shedding propensity of a person of interest can aid in trace DNA interpretation in forensic casework. This study explored STR profile quality and the presence of a DNA mixture for different skin surface locations, including fingertips before and after handwashing. As expected, unwashed fingers showed a higher prevalence …