A5036511068- Mass Spectrometry Techniques and Applications
- Forensic Fingerprint Detection Methods
- Advanced Chemical Sensor Technologies
- Analytical Chemistry and Chromatography
- Cultural Heritage Materials Analysis
- Analytical chemistry methods development
- Energetic Materials and Combustion
- Forensic Toxicology and Drug Analysis
- Forensic and Genetic Research
- Microbial bioremediation and biosurfactants
- Spectroscopy Techniques in Biomedical and Chemical Research
- Spectroscopy and Chemometric Analyses
- Bacillus and Francisella bacterial research
- Toxic Organic Pollutants Impact
- Veterinary Pharmacology and Anesthesia
- Dyeing and Modifying Textile Fibers
- Gold and Silver Nanoparticles Synthesis and Applications
- Advanced Chemical Physics Studies
- Metabolomics and Mass Spectrometry Studies
- Photochemistry and Electron Transfer Studies
- Forensic Entomology and Diptera Studies
- Digital and Cyber Forensics
- Indoor Air Quality and Microbial Exposure
- Insect and Pesticide Research
- Insect Pest Control Strategies
Indiana University – Purdue University Indianapolis
2016-2025
Indiana University Indianapolis
2024-2025
University of Indianapolis
2013-2024
Indianapolis Zoo
2013-2018
Indiana University
2008-2017
Curtin University
2010
United States Department of Commerce
2003
National Institute of Standards and Technology
2003
Michigan State University
1998-2002
The increased use of inhaled nicotine via e-cigarettes has unknown risks to lung health. Having previously shown that cigarette smoke (CS) extract disrupts the microvasculature barrier function by endothelial cell activation and cytoskeletal rearrangement, we investigated contribution in CS or (e-Cig) injury. Primary microvascular cells were exposed nicotine, e-Cig solution, condensed vapor (1-20 mM nicotine) nicotine-free solutions. Compared with nicotine-containing extract, free-CS...
Discovery of new surface-enhanced Raman spectroscopy (SERS) substrates consisting inexpensive and earth-abundant elements is an unmet need for the advancement future analysis techniques ultrasensitive detection quantification chemical biological analytes. Nanostructures (NSs) noble metals such as Au, Ag, Cu are benchmarks preparation highly efficient SERS because their unique localized surface plasmon resonance (LSPR) properties. Non-noble-metal substrates, e.g., metal chalcogenide...
A self-assembled and flexible nanosensor was developed for ultrasensitive detection of explosives from latent fingerprints.
A novel approach based on fluorescence quenching is presented for the analysis of nitrated explosives. Seventeen common explosives and their degradation products are shown to be potent quenchers pyrene, having Stern−Volmer constants that generally increase with degree nitration. Aromatic such as 2,4,6-trinitrotoluene (2,4,6-TNT) more effective than aliphatic or nitramine In addition, nitroaromatic found have unique interactions pyrene lead a wavelength dependence constants. This phenomenon...
To gain insight into the molecular basis contributing to overwintering hardiness, a comprehensive proteomic analysis comparing crowns of octoploid strawberry (Fragaria × ananassa) cultivars that differ in freezing tolerance was conducted. Four were examined for freeze and most cold-tolerant cultivar ('Jonsok') least-tolerant ('Frida') compared with goal reveal how is achieved this distinctive structure identify potential cold-tolerance-associated biomarkers. Supported by univariate...
Surface-enhanced Raman scattering (SERS) is an ultrasensitive analytical technique, which capable of providing high specificity; thus, it can be used for toxicological drug assay (detection and quantification). However, SERS-based analysis directly in human biofluids requires mitigation fouling nonspecificity effects that commonly appeared from unwanted adsorption endogenous biomolecules present (e.g., blood plasma serum) onto the SERS substrate. Here, we report a bottom-up fabrication...
Abstract: Ignitable liquid residues recovered from a fire scene will often show signs of weathering as result exposure to the heat fire. In addition, when substrate is rich in organic matter, both and microbial degradation may be observed. this study, 20 μL aliquots fresh gasoline samples were intentionally weathered also subjected potting soil. These then analyzed using passive adsorption–elution recovery method gas chromatography/mass spectrometry. Peak areas compounds interest normalized...
The microtexture and elemental composition of the backing electrical tapes have been shown to be highly discriminating. In this study, organic tape was evaluated as a complementary means distinguishing brands. adhesive 72 rolls were analyzed via Attenuated Total Reflectance Fourier Transform Infrared Spectroscopy (ATR FTIR) discriminant analysis used classify all samples by brand. Generally, accuracy for FTIR data (88-99%) higher than that (86-94%). spectra from layer most separate studies,...
Solid-phase microextraction (SPME) is a popular sampling technique in which chemical compounds are collected with sorbent-coated fiber and then desorbed into an analytical instrument such as liquid or gas chromatograph. Typically, this used to sample the headspace above solid (headspace SPME), directly (immersion SPME). However, work demonstrates alternative approach where totally vaporized (total vaporization SPME TV-SPME) so that analytes partition between vapor phase fiber. The...
ABSTRACT: Comparisons of polyvinyl chloride electrical tape typically rely upon evaluating class characteristics such as physical dimensions, surface texture, and chemical composition. Given the various techniques that are available for this purpose, a comprehensive study has been undertaken to establish an optimal analytical scheme comparisons. Of equal importance is development quantitative means sample discrimination. In study, 67 rolls black representing 34 different nominal brands were...
Abstract Total Vaporization Solid‐Phase Microextraction (TV‐SPME) relies on the same technique as standard SPME but completely vaporizes a sample extract, and analytes are sorbed directly from vapor phase. On‐fiber derivatization may also be performed using TV‐SPME, where fiber is first exposed to headspace of vial containing agent, then new sample. ɣ‐Hydroxybutyric acid (GHB) ɣ‐butyrolactone (GBL) drugs concern in that they used drug facilitated sexual assault by surreptitiously spiking...
In 2009, the R. J. Reynolds Tobacco Co. released a line of dissolvable tobacco products that are marketed as an alternative to smoking in places where is prohibited. These currently available Indianapolis, IN, Columbus, OH, and Portland, OR. This paper describes chemical characterization four such by gas chromatography−mass spectrometry (GC-MS). The were extracted prepared ultrasonic extraction using acetone, trimethylsilyl derivatization, headspace solid phase microextraction (SPME)....
Abstract The detection of explosives and explosive devices based on the volatile compounds they emit is a long‐standing tool for law enforcement physical security. Toward that end, solid‐phase microextraction (SPME) combined with gas chromatography–mass spectrometry (GC–MS) has become crucial analytical identification volatiles emitted by explosives. Previous SPME studies have identified many common formulations serve as main charge in devices. However, limited research been conducted...
Clear coats have been a staple in automobile paints for almost thirty years and are of forensic interest when comparing transferred native paints. However, the ultraviolet (UV) absorbers these paint layers not typically characterized using UV microspectrophotometry, nor results studied multivariate statistical methods. In this study, measurements were carried out by microspectrophotometry on 71 samples from American Australian automobiles, with subsequent chemometric analysis absorbance...