Výsledky vyhledávání - "Megan K. Nims"

Proton Affinity Values of Fentanyl and Fentanyl Analogues Pertinent to Ambient Ionization and Detection

Autor: Elizabeth H. Denis, Jessica L. Bade, Ryan S. Renslow, Kelsey A. Morrison, Megan K. Nims, Niranjan Govind, Robert G. Ewing

Publikováno v: Journal of the American Society for Mass Spectrometry. 33:482-490

Proton affinity is a major factor in the atmospheric pressure chemical ionization of illicit drugs. The detection of illicit drugs by mass spectrometry and ion mobility spectrometry relies on the analytes having greater proton affinities than backgro

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::340caf489ea02158aa06d62405950d53
https://doi.org/10.1021/jasms.1c00320

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Vapor detection and vapor pressure measurements of fentanyl and fentanyl hydrochloride salt at ambient temperatures

Autor: Robert G. Ewing, Megan K. Nims, Kelsey A. Morrison, Garret L. Hart, Nancy M. Avalos, Elizabeth H. Denis

Publikováno v: The Analyst. 147:4888-4894

There is a need for non-contact, real-time vapor detection of drugs to combat illicit transportation and help curb the opioid epidemic. The low volatility of drugs, like fentanyl, makes room temperature vapor detection of illicit drugs challenging, b

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a06c61bae5720325d001ee49acfb81c0
https://doi.org/10.1039/d2an01149b

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Vapor Pressures of RDX and HMX Explosives Measured at and Near Room Temperature: 1,3,5-Trinitro-1,3,5-triazinane and 1,3,5,7-Tetranitro-1,3,5,7-tetrazocane

Autor: Polly E. Gongwer, Rachel C. Fausey, Megan K. Nims, Elizabeth H. Denis, Harry J. Rose, Robert G. Ewing, Kelsey A. Morrison, Alicia Broderick

Publikováno v: The Journal of Physical Chemistry A. 125:1279-1288

Knowing accurate saturated vapor pressures of explosives at ambient conditions is imperative to provide realistic boundaries on available vapor for ultra-trace detection. In quantifying vapor content emanating from low-volatility explosives, we obser

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c1fb042596fb0b41476a223f925ed4db
https://doi.org/10.1021/acs.jpca.0c10409

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Non-contact vapor detection of illicit drugs via atmospheric flow tube-mass spectrometry

Autor: David A. Atkinson, Robert G. Ewing, Kelsey A. Morrison, Brian H. Clowers, Blandina R. Valenzuela, Megan K. Nims, Elizabeth H. Denis

Publikováno v: The Analyst. 145:6485-6492

Real-time, non-contact detection of illicit drugs is a desirable goal for the interdiction of these controlled substances, but the relatively low vapor pressures of such species present a challenge for trace vapor detection technologies. The introduc

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f2d72391c6da8ff5a55aecfdf73d7b24
https://doi.org/10.1039/d0an00691b

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Compound specific stable isotope analysis of aromatics in diesel fuel to identify potential cocktailing

Autor: Megan K. Nims, Angela M. Melville, James J. Moran, Kristin H. Jarman, Bob W. Wright

Publikováno v: Forensic science international. 334

Estimates suggest billions of dollars are lost annually in the US due to fuel tax fraud. One method of fuel fraud is called "cocktailing" and involves blending products that are non-taxed, lower value, taxed at a lower rate, or unwanted/less-refined

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8ab985e102fee43ce6ba4ce8d0f6f31d
https://pubmed.ncbi.nlm.nih.gov/35395521

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Experimental and field evaluation of otolith strontium as a marker to discriminate between river-spawning populations of walleye in Lake Erie

Autor: Kuan-Yu Chen, Stuart A. Ludsin, Paris D. Collingsworth, John W. Olesik, Konrad Dabrowski, Morgan M. Corey, Elizabeth A. Marschall, Megan K. Nims, Jason J. Van Tassell

Publikováno v: Canadian Journal of Fisheries and Aquatic Sciences. 74:693-701

Otolith microchemistry is a commonly used tool for stock discrimination in fisheries management. Two key questions remain with respect to its effectiveness in discriminating among river-spawning populations. First, do larvae remain in their natal riv

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4a9cbbbd29720b83dbda503870546779
https://doi.org/10.1139/cjfas-2015-0565

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Geochemical signatures in fin rays provide a nonlethal method to distinguish the natal rearing streams of endangered juvenile Chinook Salmon Oncorhynchus tshawytscha in the Wenatchee River, Washington

Autor: Timothy J. Linley, Russell B. Langshaw, Eirik J. Krogstad, Megan K. Nims

Publikováno v: Fisheries Research. 181:234-246

Rebuilding fish populations that have undergone a major decline is a challenging task that can be made more complicated when estimates of abundance obtained from physical tags are biased or imprecise. Abundance estimates based on natural tags where e

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c4aadfc73bf9970df903deb961ac57de
https://doi.org/10.1016/j.fishres.2016.04.004

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