Public health moves to innocence and evasion? Graduate training programs' engagement in truth and reconciliation for Indigenous health.

Objectives: Indigenous peoples are the first peoples of what is now called Canada. Canadians have benefitted from their largesse and contributions in a myriad of ways that remain unacknowledged. Indeed, ongoing colonization and systemic anti-Indigenous racism in all quarters of our society have had heinous impacts on their health and well-being.

The public health emergency of climate change: how/are Canadian post-secondary public health sciences programs responding?

Objective: The Intergovernmental Panel on Climate Change recently issued a statement that the fate of human society and human health is at serious risk of catastrophic impacts unless we take bold action to keep global warming under 1.5 °C. In 2015, the Canadian Public Health Association noted emerging efforts to embrace intersectoral approaches to global change in public health research and practice.

Chemical Ionization Mass Spectrometry: Applications for the Measurement of Nonvolatile Organics at Ocean Worlds.

A new technique that has applications for the detection of nonvolatile organics on Ocean Worlds has been developed. Here, liquid mixtures of fatty acids (FAs) and/or amino acids (AAs) are introduced directly into a miniature quadrupole ion trap mass spectrometer (QITMS) developed at Jet Propulsion Laboratory and analyzed. Two ionization methods, electron impact and chemical ionization (EI and CI, respectively), are compared and contrasted.

Computer Modeling of an Ion Trap Mass Analyzer, Part I: Low Pressure Regime.

We present the multi-particle simulation program suite Computational Ion Trap Analyzer (CITA) designed to calculate the ion trajectories within a Paul quadrupole ion trap developed by the Jet Propulsion Laboratory (JPL). CITA uses an analytical expression of the electrodynamic field, employing up to six terms in multipole expansion and a modified velocity-Verlet method to numerically calculate ion trajectories. The computer code is multithreaded and designed to run on shared-memory architectures.

Digitally synthesized high purity, high-voltage radio frequency drive electronics for mass spectrometry.

Reported herein is development of a quadrupole mass spectrometer controller (MSC) with integrated radio frequency (rf) power supply and mass spectrometer drive electronics. Advances have been made in terms of the physical size and power consumption of the MSC, while simultaneously making improvements in frequency stability, total harmonic distortion, and spectral purity. The rf power supply portion of the MSC is based on a series-resonant LC tank, where the capacitive load is the mass spectrometer itself, and the inductor is a solenoid or toroid, with various core materials.

Miniaturized system of a gas chromatograph coupled with a Paul ion trap mass spectrometer.

Miniature gas chromatography (GC) and miniature mass spectrometry (MS) instrumentation has been developed to identify and quantify the chemical compounds present in complex mixtures of gases. The design approach utilizes micro-GC components coupled with a Paul quadrupole ion trap (QIT) mass spectrometer. Inherent to the system are high sensitivity, good dynamic range, good QIT resolution, low GC flow-rates to minimize vacuum requirements and the need for consumables; and the use of a modular approach to adapt to volatile organic compounds dissolved in water or present in sediment.