John Chasse

John Chasse is the Managing Editor of Spectroscopy and LCGC. Direct correspondence to: jchasse@mjhlifesciences.com

Articles by John Chasse

To better determine fish freshness within the context of rapid spectroscopic analyses, salmon fillet was analyzed via hand-held fluorescence and absorption spectroscopy devices across the visible and near-infrared (vis-NIR) range and benchmarked against industry-standard potentiometry and the gold-standard laboratory procedure, nucleotide extraction assays, over a 11-day period.

Cuong Cao from the Institute for Global Food Security at the School of Biological Sciences of Queen’s University in Belfast and his team of researchers conducted a preliminary exploratory study and detected the presence of MPs by automated Raman spectroscopy and subsequently NPs by using nanoparticle-on-film SERS (NPoF SERS) substrate released from chewing gum base plastic, a technique that has potential in screening a varied array of environmental pollutants, as well as a point-of-site tool when coupled with a handheld Raman instrument. Cao spoke to Spectroscopy about this work, and the resulting paper.

Reflecting on 2024, the editors of Spectroscopy highlight some of the most notable articles and online content on inductively coupled plasma mass spectrometry (ICP-MS) and inductively coupled-optical emission spectroscopy (ICP-OES).

The Institute of Forensic Science and Criminology of Bundelkhand University (Jhansi, India) has used Fourier transform infrared spectroscopy (FT-IR) combined with principal component analysis (PCA) and partial least square regression (PLSR) to investigate adulteration in petroleum products and to design an adulterant profiling method.

Researchers at Texas A&M University (College Station, Texas) presented a novel approach to forensic hair analysis that is based on high-throughput, nondestructive, and non-invasive surface-enhanced Raman spectroscopy (SERS) and machine learning (ML). Using this approach, Dmitry Kurouski and his team investigated the reliability of the detection and identification of artificial dyes on hair buried in three distinct soil types for up to eight weeks.

A multi-organizational team, believing that a reason for slow adoption is a lack of evidence that data taken on one spectrometer can transfer across to data taken on another spectrometer to provide consistent diagnoses, investigated multi-center transferability using human oesophageal tissue. By using a common protocol, the researchers aimed to minimize the difference in machine learning performance between centers.

A recent article authored by scientists from the Institute of Sport and Preventive Medicine, part of the University of Saarland (Saarbrücken, Germany), discusses their investigation of the absolute and relative test-retest reliability of the Moxy Monitor, as well as their investigations into side differences of oxygen saturation at the vastus lateralis muscle of both legs in male cyclists.

Jason Dwyer of the University of Rhode Island has been named the recipient of the American Electrophoresis Society’s Mid-Career Award, which honors exceptional contributions to the field of electrophoresis, microfluidics, and related areas by an individual who is currently in the middle of their career.

Noureddine Melikechi Image Credit: ©Courtesy of Melikechi

Using logistics regression on laser-induced breakdown spectroscopy (LIBS) spectra of plasma samples collected pre- and post- Covid-19 pandemic from donors known to have developed various levels of antibodies to the SARS-Cov-2 virus, University of Massachusetts physics professor Nourddine Melikechi’s research team has shown that relying on the levels of sodium (Na), potassium (K), and magnesium (Mg) together is more efficient at differentiating the two types of plasma samples than any single blood metal alone. We spoke to Melikechi about this research.

The Coblentz Society created the Clara Craver Award to recognize young individuals who have made significant contributions in applied analytical vibrational spectroscopy. The work may include any aspect of infrared (IR), terahertz (THz), or Raman spectroscopy in applied analytical vibrational spectroscopy. This year’s recipient, Ishan Barman, is an Associate Professor in the Department of Mechanical Engineering at the Johns Hopkins University with joint appointments in Oncology and Radiology and Radiological Science.