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Maryam Zia,Sulaiman Faisal,Dilawar Farhan Shams,Farida Anjum,Mehk Saeed,ZiaUllah Shah,Akhtar Nadhman 한국진공학회(ASCT) 2021 Applied Science and Convergence Technology Vol.30 No.3
This study investigated the photocatalytic degradation of pure low-density polyethylene (LDPE) and commercial-grade polyethylene (PE) films with iron-doped zinc oxide (Fe-ZnO) nanoparticles under visible light. The study was particularly focused on the role of reactive oxygen species (ROS) and the types of plastic degradation. The Fe-ZnO were synthesized using the co-precipitation method and characterized by TEM and XRD. Degradation of 6.35 cm² films of LDPE and commercial grade PE was tested under artificial LED light (84 lm/W) and dark in Fe-ZnO suspensions of 10 ml having concentrations ranging from 10 to 1000 g/ml. The results showed a maximum weight reduction of 13.8 % for pure LDPE films at 200 g/ml and 15 % for commercial grade PE at 1000 g/ml in 14 days. In comparison, no weight reduction was observed in the dark, which confirmed that the degradation was induced by the production of ROS moieties in visible light i.e., singlet oxygen (30.11 %), hydroxyl ions (30.45 %), and hydroxyl radicals (39.34 %). The degradation was further confirmed by FTIR with the formation of alcohols and alkenes and SEM analysis that showed visible cracks in both LDPE and PE. The study unveiled Fe-ZnO nanoparticles as an efficient substitute to degrade polyethylene under visible light.
Chorea as a Presentation of SARS-CoV-2 Encephalitis: A Clinical Case Report
Muhammad Hassan,Fibhaa Syed,Liaqat Ali,Haris Majid Rajput,Farhan Faisal,Waleed Shahzad,Mazhar Badshah 대한파킨슨병및이상운동질환학회 2021 Journal Of Movement Disorders Vol.14 No.3
Central nervous system (CNS) involvement in SARS-CoV-2 is now a known fact, likely due to viral transmission through the olfactory nerve and high brainstem viral load, which also suggests dissemination in the ambiguus and solitary nuclei from the respiratory tract via the vagus nerve