John D Howa
Overview
Explore the profile of John D Howa including associated specialties, affiliations and a list of published articles.
Author names and details appear as published. Due to indexing inconsistencies, multiple individuals may share a name, and a single author may have variations. MedLuna displays this data as publicly available, without modification or verification
Snapshot
Snapshot
Articles
11
Citations
39
Followers
0
Related Specialties
Related Specialties
Top 10 Co-Authors
Top 10 Co-Authors
Published In
Published In
Affiliations
Affiliations
Soon will be listed here.
Recent Articles
1.
Newton P, Chesson L, Mayxay M, Dondorp A, Tabernero P, Howa J, et al.
Sci Rep
. 2024 Feb;
14(1):3995.
PMID: 38369604
We explored whether isotope ratio mass spectrometry (IRMS) is useful to investigate the origin of falsified antimalarials. Forty-four falsified and genuine antimalarial samples (artesunate, artemether-lumefantrine, dihydroartemisinin-piperaquine and sulphamethopyrazine-pyrimethamine) were analyzed...
2.
Nair V, Howa J, Morrison M, Beggs L, Campbell T, Fedoruk M, et al.
Drug Test Anal
. 2023 Mar;
15(11-12):1356-1360.
PMID: 36929692
19-Norandrosterone (19NA) is the preferred urinary target compound to identify doping with nandrolone or related 19-norsteroids. At concentrations between 2.5 and 15 ng/mL, isotope ratio mass spectrometry (IRMS) is required...
3.
Bitter N, Fernandez D, Driscoll A, Howa J, Ehleringer J
Food Chem
. 2020 Mar;
320:126602.
PMID: 32222657
Determining coffee region-of-origin is most appropriately addressed through analyses of the product available to the consumer. We analyzed the concentrations of 44 trace elements in 53 samples of roasted Arabica...
4.
Driscoll A, Howa J, Bitter N, Ehleringer J
Rapid Commun Mass Spectrom
. 2019 Oct;
34(7):e8626.
PMID: 31658500
Rationale: Fraudulent region-of-origin labeling is a concern for high-value, globally traded commodities such as coffee. The oxygen isotope ratio of cellulose is a useful geographic tracer, as it integrates climate...
5.
Chesson L, Barnette J, Bowen G, Brooks J, Casale J, Cerling T, et al.
Oecologia
. 2018 Jun;
187(4):1077-1094.
PMID: 29955984
The heart of forensic science is application of the scientific method and analytical approaches to answer questions central to solving a crime: Who, What, When, Where, and How. Forensic practitioners...
6.
Howa J, Barnette J, Chesson L, Lott M, Ehleringer J
Talanta
. 2018 Feb;
181:125-131.
PMID: 29426490
Isotope ratio analysis has been shown to discriminate samples of forensic interest and to link many synthesized and natural materials to their precursors when traditional chemical and physical analyses cannot....
7.
Lott M, Howa J, Chesson L, Ehleringer J
Rapid Commun Mass Spectrom
. 2015 Jul;
29(15):1381-8.
PMID: 26147477
Rationale: Elemental analyzer systems generate N(2) and CO(2) for elemental composition and isotope ratio measurements. As quantitative conversion of nitrogen in some materials (i.e., nitrate salts and nitro-organic compounds) is...
8.
Howa J, Lott M, Ehleringer J
Forensic Sci Int
. 2014 Sep;
244:152-7.
PMID: 25244291
Isotope ratio analysis allows forensic investigators to discriminate materials that are chemically identical but differ in their isotope ratios. Here we focused on the discrimination of pentaerythritol tetranitrate (PETN), an...
9.
Howa J, Lott M, Ehleringer J
Rapid Commun Mass Spectrom
. 2014 May;
28(13):1530-4.
PMID: 24861604
Rationale: Because of the threat of bombings using improvised explosives containing ammonium nitrate (AN), law enforcement and intelligence communities have been interested in stable isotope techniques for tracking and discriminating...
10.
Howa J, Lott M, Chesson L, Ehleringer J
Forensic Sci Int
. 2014 May;
240:80-7.
PMID: 24814332
RDX and HMX are explosive compounds commonly used by the military and also occasionally associated with acts of terrorism. The isotopic characterization of an explosive can be a powerful approach...