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From automated Raman to cost-effective nanoparticle-on-film (NPoF) SERS spectroscopy: A combined approach for assessing micro- and nanoplastics released into the oral cavity from chewing gum.
J Hazard Mater
December 2024
Institute for Global Food Security, School of Biological Sciences, Queen's University Belfast, Belfast, United Kingdom; Material and Advanced Technologies for Healthcare, Queen's University of Belfast, 18-30 Malone Road, Belfast BT9 5DL, United Kingdom. Electronic address:
Microplastics (MPs) and Nanoplastics (NPs), a burgeoning health hazard, often go unnoticed due to suboptimal analytical tools, making their way inside our bodies through various means. Surface Enhanced Raman Spectroscopy (SERS), although is utilized in detecting NPs, challenges arise at low concentrations due to their low Raman cross section and inability to situate within hotspots owing to their ubiquitous size and shape. This study presents an innovative and cost-effective approach employing household metallic foils (aluminium and copper) as nanoparticle-on-film (NPoF) substrates for targeting such analytes.
View Article and Find Full Text PDFEffect of chewing hard material on boosting brain antioxidant levels and enhancing cognitive function.
Front Syst Neurosci
November 2024
Department of Preventive Dentistry, School of Dentistry, Kyungpook National University, Daegu, Republic of Korea.
Introduction: Chewing has been reported to enhance cognitive function through the increase in cerebral blood flow. However, the mechanisms linking cerebral blood flow increase to metabolic changes in the brain affecting cognition remain unclear. We hypothesized that glutathione (GSH) plays a pivotal role in these mechanisms.
View Article and Find Full Text PDFCharacterization of urban park litter pollution.
Waste Manag
December 2024
Legambiente Onlus, Via Salaria, 403 - 00199 Rome, Italy.
Article Synopsis
- * A total of 161,293 litter items were collected, with cigarette butts making up the largest portion at 36.3%, along with significant amounts of metal (16.2%) and glass (13.0%); surprisingly, face masks represented only 0.2% of the waste in 2022.
- * The study found no significant correlation between waste levels and city population or density, although a slight trend showed a decrease in plastic bottles over time and identified 19 different polymers, including
Article Synopsis
- * This study compares the effectiveness of conventional maxillofacial obturators versus those lined with a soft-liner, examining their impact on masticatory performance, speech, and quality of life in patients.
- * Results show that the relined obturator significantly improves masticatory performance (3.22 vs. 2.74) and speech quality (lower jitter), highlighting the benefits of using a soft-liner in prosthetic rehabilitation.
Mercury in saliva, milk, and hair of nursing mothers in southeastern Iranian mothers: levels, distribution and risk assessment.
Environ Geochem Health
November 2024
Environmental Science and Technology Laboratory, Centre for Research in Environment, Sustainability and Climate Change, Directorate of Research, SRM Institute of Science and Technology, Kancheepuram District, Tamil Nadu, 603203, India.
This research is on lactating mothers in the city of Chah Bahar in Iran. This descriptive-analytical and questionnaire study selected a random sample of 80 mothers to examine mercury levels in their hair, milk, and saliva. The average concentration of mercury in milk, hair and saliva of mothers was 1.
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