Identifying the sources of mercury exposure in dental workers.

Dental professionals who handle dental amalgam are at risk of mercury exposure, though the prevalence and severity of elevated mercury levels from non-occupational sources are not well characterized. We report two dental workers who had elevated urinary mercury levels (37 and 25.6 mcg/L) during routine health screenings.

Quantifying the noncarcinogenic and carcinogenic risks resulting from the inhalation of PM-bound metals: A multicity analysis and implications for public health.

Toxic metals in PM represent a growing public health concern because of their potential health effects. Ambient PM samples were collected from five provinces around Bangkok from December 2020 to December 2021. The concentrations of PM and metals (arsenic, cadmium, chromium, cobalt, nickel, lead, and vanadium) were analyzed.

Sweat-based stress screening with gas chromatography-ion mobility spectrometry and electronic nose.

Background: Diagnosis of stress generally involves uses of questionnaires which can provide biased results. The more reliable approach relies on observation of individual symptoms by psychiatrists which is time consuming and could not be applicable for massive scale screening tests. This research established alternative approaches with gas chromatography-ion mobility spectrometry (GC-IMS) and electronic nose (e-nose) to perform fast stress screening based on fingerprinting of highly volatile compounds in headspaces of sweat.

Gas chromatography-flame ionization detector for sweat based COVID-19 screening.

Simple approach for rapid screening of corona virus disease 2019 (COVID-19) has been developed. This applied gas chromatography-flame ionization detector (GC-FID) analyzing the potential compound marker in sweat samples obtained from COVID-19 positive and negative volunteers in Bangkok, Thailand. The samples were collected by using cotton rods for 15 min, heated at 90 °C for 5 min, and the volatile compounds in the headspace (HS) were injected (5.

Aerosol Concentrations During Otolaryngology Procedures in a Negative Pressure Isolation Room.

Objective: To evaluate the role of a negative pressure room with a high-efficiency particulate air (HEPA) filtration system on reducing aerosol exposure in common otolaryngology procedures.

Study Design: Prospective quantification of aerosol generation.

Settings: Tertiary care.

"Assessing exposure of printing factory workers in thailand to selected heavy metals using urine and hair as non-invasive matrices".

Background: There are few thorough studies on the extent and inter-element relationships of heavy metal contamination in printing factory workers, especially in developing countries. The objective of this study was to determine the levels of eight heavy metals, including arsenic (As), cadmium (Cd), chromium (Cr), nickel (Ni), cobalt (Co), lead (Pb), mercury (Hg), and manganese (Mn), in urine and scalp hair of printing industry workers, and assess inter-element correlations.

Methods: We examined a total of 85 urine samples and 85 scalp hair samples (3 cm hair segments taken from near the scalp) in 85 printing workers from a printing house in Bangkok, Thailand.