Publications by authors named "N K Kanellopoulos"
This study explores the layer-by-layer (LBL) modification of polyacrylonitrile (PAN) hollow fibers for effective Mg/Li separation. It employs an LBL method of surface modification using polyelectrolytes, specifically aiming to enhance ion selectivity and improve the efficiency of lithium extraction from brines or lithium battery wastes, which is critical for battery recycling and other industrial applications. The modification process involves coating the hydrolyzed PAN fibers with alternating layers of positively charged polyelectrolytes, such as poly(allylamine hydrochloride) (PAH), polyethyleneimine (PEI), or poly(diallyldimethylammonium chloride) (PDADMAC) and negatively charged polyelectrolytes, such as poly(styrene sulfonate) (PSS), to form polyelectrolyte multilayers (PEMs).
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- Fine particulate matter (PM2.5) is a major contributor to air pollution linked to respiratory illnesses, prompting a study in Volos to explore its impact on Emergency Department (ED) visits for respiratory issues.
- Over a year, data from automated air quality stations showed PM2.5 levels exceeded safe limits for nearly half the study period, especially in winter, correlating with increased respiratory-related ED visits.
- The study confirmed that higher PM2.5 levels were associated with more visits for conditions like asthma and upper respiratory infections, while factors like age and temperature also influenced ED visit rates, but humidity had no significant effect.
Effect of PM Levels on Respiratory Pediatric ED Visits in a Semi-Urban Greek Peninsula.
Int J Environ Res Public Health
June 2021
Ambient air pollution accounts for an estimated 4.2 million deaths worldwide. Particulate matter (PM) particles are believed to be the most harmful, as when inhaled they can penetrate deep into the lungs.
View Article and Find Full Text PDFA COVID-19 outbreak occurred among residents of a Roma settlement in Greece (8 April-4 June 2020). The aim of this study was to identify factors associated with an increased risk of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection and to evaluate the effectiveness of control measures implemented. Data were analyzed from individuals that were tested for SARS-CoV-2 during contact tracing, population screening or hospital visits.
View Article and Find Full Text PDFRepeated Antigen-Based Rapid Diagnostic Testing for Estimating the Coronavirus Disease 2019 Prevalence from the Perspective of the Workers' Vulnerability before and during the Lockdown.
Int J Environ Res Public Health
February 2021
Background: No previous study has investigated the SARS-CoV-2 prevalence and the changes in the proportion of positive results due to lockdown measures from the angle of workers' vulnerability to coronavirus in Greece. Two community-based programs were implemented to evaluate the SARS-CoV-2 prevalence and investigate if the prevalence changes were significant across various occupations before and one month after lockdown.
Methods: Following consent, sociodemographic, clinical, and job-related information were recorded.