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The Critical Role of Commercial Analytical Reference Standards in the Control of Chemical Risks: The Case of PFAS and Ways Forward.
Environ Health Perspect
January 2025
Department of Environmental Health, Boston University School of Public Health, Boston, Massachusetts, USA.
Background: Various countries have instituted risk governance measures to control and minimize the risks of chemicals at the national and international levels. Activities typically include risk assessment based on ) hazard and exposure assessments; ) setting limits on the production, use, and emissions of chemicals; ) enforcement of regulations; and ) monitoring the effectiveness of the measures taken. These steps largely depend on chemical analysis and access to pure chemical reference standards.
View Article and Find Full Text PDFPredicting Perovskite Photovoltaics Performance.
ACS Appl Mater Interfaces
January 2025
Department of Physics and Astronomy & Wright Center for Photovoltaic Innovation and Commercialization, The University of Toledo, Toledo, Ohio 43606, United States.
Wide band gap FACsPb(IBr) perovskite photovoltaic (PV) devices are measured by spectroscopic ellipsometry in the through-the-glass configuration and analyzed to determine the complex optical property spectra of the perovskite absorber as well as the structural properties of all constituent layers. This information is used to simulate external quantum efficiency (EQE) spectra, to calculate PV device performance parameters such as short circuit current density, open circuit voltage, fill factor, and power conversion efficiency, and to develop strategies for increasing the accuracy of predictions. Simulations and calculations tend to overestimate PV device performance parameters, undermining the accuracy and usefulness of those simulations.
View Article and Find Full Text PDFGlobal and Indian Scenarios of Fatal and Non-fatal Occupational Injuries: A Secondary Data Analysis.
Indian J Occup Environ Med
December 2024
Department of Atomic Energy, Variable Energy Cyclotron Centre (VECC), Government of India, Kolkata, West Bengal, India.
Introduction: Fatal and non-fatal occupational injuries are one of the most important public health problems all over the world. Its number greatly varies from country to country over the years. Worldwide approximately 4% of global gross domestic product (GDP) is lost due to occupational injuries.
View Article and Find Full Text PDFPhysical literacy among chinese elementary school students: the mediating role of physical knowledge and physical competency.
BMC Public Health
January 2025
School of Health Management Policy, Chinese Academy of Medical Sciences & Peking Union Medical College, No. 46 Xizongbu Hutong, Dongcheng District, Beijing, 100730, People's Republic of China.
Background: Physical literacy (PL) is pivotal for improving sedentary behaviors, enhancing intrinsic motivation for physical activity, and supporting the growth and development of adolescents. This study aims to measure the current situation and internal pathway of PL among Chinese elementary school students.
Methods: This study was conducted from June to July 2022 and used multistage cluster sampling to select the study subjects.
A 25-year neglected giant anterior urethral stone associated with urethral diverticulum and urethrocutaneous fistula: A case report.
Int J Surg Case Rep
January 2025
Department of Urology, Faculty of Medicine, Udayana University, Universitas Udayana Teaching Hospital, Bali, Indonesia.
Introduction: Urethral stone (US) is an uncommon disease that may be associated with other conditions. It's interesting if the patient neglected his disease after decades. This case report discusses the giant anterior urethral stone, as well as the neglect in the peripheral area.
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