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Forensic Science and Technology Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Discipline
- Keyword
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- Birefringence; Color calibration; Polarized light microscopy; Forensic analysis; Spectral imaging (1)
- DNA deconvolution; Single cell genomics; Forensic analysis; Probabilistic genotyping; Complex mixtures (1)
- Latent print analysis; Gas chromatography; Mass spectrometry; Source association; Forensic chemistry (1)
- Metal-organic frameworks; Emergent properties; Structure-property relationships; Organic linkers; Redox conductivity (1)
- Smokeless powder; Gunshot residue; Gas chromatography; Mass spectrometry; Forensic analysis (1)
Articles 1 - 5 of 5
Full-Text Articles in Forensic Science and Technology
Error Rate Determination Of Latent Print Chemistry Via 1d And 2d Gas Chromatography, Jessica Kindell
Error Rate Determination Of Latent Print Chemistry Via 1d And 2d Gas Chromatography, Jessica Kindell
Electronic Theses and Dissertations, 2020-2023
Latent print evidence collected from crime scenes are analyzed and compared by examiners using the ACE-V protocol (Analysis, Comparison, Evaluation-Verification) to identify potential suspects. However, smudged and poor-quality prints, usually deemed inconclusive, could be utilized for source association or discrimination based on the chemistry of the oils and sweat that comprises the latent print residue (LPR). For this research, LPRs were collected from various places on the face and analyzed via two-dimensional gas chromatography-mass spectrometry (2D GC-MS), one-dimensional (1D) GC-MS, and direct analysis in real time-high resolution mass spectrometry (DART-HRMS). LPR recovery with two common sample preparation methods, derivatization and …
Complex Dna Mixture Deconvolution By Single Cell Genomics: Direct Physical Cell Subsampling And High Sensitivity Dna Typing, Kaitlin Huffman
Complex Dna Mixture Deconvolution By Single Cell Genomics: Direct Physical Cell Subsampling And High Sensitivity Dna Typing, Kaitlin Huffman
Electronic Theses and Dissertations, 2020-2023
Biological evidence is often found at crime scenes and can comprise of DNA from the victim(s) and perpetrator(s) to a crime as well as from individuals with no direct relationship to the incident. This can complicate analysis as DNA mixtures are one of the more difficult sources of biological evidence to interpret. Probabilistic genotyping (PG) has greatly aided in mixture analysis. However, even with PG, standard bulk mixture approaches do not always result in probative results as allele overlap, artifacts, or low-level minor contributors inevitably cause genotype information loss. Therefore, deconvolution of forensic DNA mixtures into their individual component DNA …
Spectrally-Based Color Calibration Of Microscopes For Birefringence Analysis, Olivia Feild
Spectrally-Based Color Calibration Of Microscopes For Birefringence Analysis, Olivia Feild
Electronic Theses and Dissertations, 2020-2023
The analysis of colors is omnipresent in forensics. While their use for macroscopic evidence such as soil sees a large amount of research, their correct handling is more challenging when observed under a microscope. Either for hairs or textile fibers, their color (from melanin, dyes or for birefringence analysis) is crucial in being able to compare between fibers found at a crime scene. Typically, color is quantified using a color space, such as RGB, XYZ, L*a*b*, and L*u*v*. Unfortunately, color is very subjective and often difficult to quantify accurately, even using digital detectors. Finding true matches of colors has been …
Reticular Design And Synthesis Of Metal-Organic Frameworks With Targeted Emergent Properties, David Fairchild
Reticular Design And Synthesis Of Metal-Organic Frameworks With Targeted Emergent Properties, David Fairchild
Electronic Theses and Dissertations, 2020-2023
The research presented in this dissertation describes the design and synthesis of substitutional-solid-solution-based multivariate metal-organic frameworks (SSS-based MTV MOFs) with functionalized organic linkers to study their emergent properties in the crystalline solid state. The synthetic versatility and tunability of organic chemistry coupled with the predictable organization of inorganic structures enables MTV MOF systems to further the fundamental understanding of structure-composition-property relationships for the targeted design of applied materials due to their ability to control the structure, composition, and property independently. To begin, a set of terphenyl linkers with varied steric and electronic properties were crystallized as a family of UiO-type …
Analysis And Characterization Of Smokeless Powders And Smokeless Powder Residues, Emily Lennert
Analysis And Characterization Of Smokeless Powders And Smokeless Powder Residues, Emily Lennert
Electronic Theses and Dissertations, 2020-2023
The ability to associate a smokeless powder, smokeless powder residue, or organic gunshot residue (OGSR) to one another may be helpful in determining the origin of a suspected sample and aid in linking a suspect to a crime scene. In this study, smokeless powders were extracted and analyzed via gas chromatography – mass spectrometry (GC-MS) and direct analysis in real time – high resolution mass spectrometry (DART-HRMS). Subsequently, group definition was performed using hierarchical cluster analysis and principal component analysis followed by internally validated classification models. Then, smokeless powder residues were generated in-lab and extracted. Resulting residue data from each …