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The Development of Bioaffinity-based Concepts for On-site Forensic Analyses: Blood, Sweat, and…Fingerprints?
Başlık:
The Development of Bioaffinity-based Concepts for On-site Forensic Analyses: Blood, Sweat, and…Fingerprints?
Yazar:
Huynh, Crystal, author.
ISBN:
9780355966374
Yazar Ek Girişi:
Fiziksel Tanımlama:
1 electronic resource (84 pages)
Genel Not:
Source: Dissertation Abstracts International, Volume: 79-10(E), Section: B.
Advisors: Jan Halamek Committee members: Gabrielle Fuchs; Igor Lednev; Maksim Royzen; Mehmet Yigit.
Özet:
There have been many advances in forensic science over the recent years, but a majority of the tests currently preformed are still heavily reliant upon laboratory-based processes. This means that valuable pieces of information are left unexamined until a crime scene has been completely processed and evidence is moved to a crime lab. In some cases, the evidence may even be left in a queue due to backlogs from previous cases. The delay resulting from the time necessary for crime scene processing and transportation, as well as additional time spent waiting on lab equipment availability, hinders an investigator's ability to proceed in an investigation. In response to this dilemma, there has been a push towards more rapid, on-site analyses. The development of bioaffinity-based systems introduces a new methodology for on-site forensic analyses.
The first example of this is a new approach to fingerprint analysis. Traditionally, fingerprint analysis is reliant upon pictorial comparisons where arch, whorl, and loop patterns are examined and matched to a reference fingerprint (whether from the person in question or a database). Since the establishment of this form of analysis, research has been carried out using a variety of methods to detect different substances -- both exogenous and endogenous -- from fingerprint samples because many fingerprints are too smudged to provide a proper identification. It has been found that not only do fingertips easily retain substances found on other surfaces, , they also naturally secrete different metabolites from within the body as part of the fingerprint sample. Many of these studies, however, are still laboratory-based techniques. By utilizing a bioaffinity-based system developed by our lab, fingerprint samples can be analyzed directly at a crime scene to provide the biological sex of an individual.
Another use of bioaffinity-based systems is for the detection of particular sample types. In the case presented here, sweat is detected via its abundance of lactate. Human beings produce more sweat during rigorous activity which makes sweat a common piece of evidence present at crime scenes. Sweat can also be a very valuable piece of evidence because it may contain skin cells that hold DNA. - It is generally collected from shirts, towels, and other pieces of fabric, but these materials may not always be present. A method for finding sweat on different surfaces could aid in making sweat a more collectable piece of evidence. It is also important to determine the presence of sweat because it contains substances associated with ABO (A, B, AB, and/or O blood type) groups that act as a contaminant to other samples such as blood.
Lastly, bioaffinity-based systems could be used for the differentiation of individuals. The study presented here will cover the use of this method in blood serum. DNA analysis is possible, however, the creation of a DNA profile is not only time-consuming and expensive, - but there may not even be a match (either from a person or database). A bioaffinity-based system is inexpensive and can be performed on-site to ascertain valuable information more rapidly than many current methods. Investigators would then have information to work with as they wait for DNA analysis from their crime labs. The system utilizes a combination of different bioaffinity-based sub-systems to analyze a protein marker panel for the differentiation of individuals.
Bioaffinity-based systems are extremely versatile tools that can be adjusted for the analysis of a variety of forensic samples. Slightly different systems can be used for the determination of different demographics, the determination of different sample types, and the differentiation of individuals. By changing and adjusting different parts of these bioaffinity-based systems, many cost-effective and rapid methods of analyses can be produced for the on-site analysis of different forensically-relevant samples.
Notlar:
School code: 0668
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Yer Numarası | Demirbaş Numarası | Shelf Location | Lokasyon / Statüsü / İade Tarihi |
---|---|---|---|
XX(680480.1) | 680480-1001 | Proquest E-Tez Koleksiyonu | Arıyor... |
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