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Rare and Fatal Gastrointestinal Mucormycosis (Zygomycosis) in a COVID-19 Patient: A Case Report
Epifanio Silvino do Monte Junior,Marcos Eduardo Lera dos Santos,Igor Braga Ribeiro,Gustavo de Oliveira Luz,Elisa Ryoka Baba,Bruno Salomão Hirsch,Mateus Pereira Funari,Eduardo Guimarães Hourneaux De Mo 대한소화기내시경학회 2020 Clinical Endoscopy Vol.53 No.6
The novel coronavirus disease (COVID-19) quickly spread to all continents. However, data regarding all the signs and symptomsof COVID-19 are insufficient. Patients with COVID-19 might present higher susceptibility to fungal coinfections. Mucormycosis isa rare and often life-threatening fungal disease characterized by vascular invasion by hyphae, resulting in thrombosis and necrosis. This is the first case report of mucormycosis in a COVID-19 patient. An 86-year-old male patient was admitted to the emergencyroom with acute diarrhea, cough, dyspnea, and fever from 5 days prior. Blood tests revealed a hemoglobin level of 14.3 mg/dL. Fivedays following the admission, the patient presented with melena and a hemoglobin level of 5.6 mg/dL. A transfusion of three unitsof red blood cells was required. Esophagogastroduodenoscopy revealed two giant gastric ulcers with necrotic debris and a deephemorrhagic base without active bleeding. Furthermore, biopsies confirmed mucormycosis. Despite intensive care, the patient died36 hours after the esophagogastroduodenoscopy.
Cast Aluminum Surface Reinforced with Carbon Nanotube via Solubilization Treatment
Paulo R. O. Brito,Cristhian R. L. Loayza,Mário E. S. Sousa,Eduardo M. Braga,Rômulo S. Angélica,Simone P. A. da Paz,Marcos A. L. Reis 대한금속·재료학회 2022 METALS AND MATERIALS International Vol.28 No.3
Carbon nanotubes (CNTs) are noteworthy, as they reinforce the metallic matrix, due to mechanical properties, such asthe ~ 1.0 TPa Young module. To improve the maintenance of the commercially pure aluminum surface, multi-walled carbonnanotubes were incorporated into the aluminum surface with heat treatment by solid solubilization, in order to improvethe surface properties of aluminum. The aluminum samples were chemically attacked for 30, 60 and 120 s and placed in acontainer with CNTs, being subjected to a temperature of 640 °C for 1 h. Then, the roughness was evaluated by a roughnessmeter for morphology in the scanning electron microscopy. An intensity of aggregation of CNTs was evaluated by XRD, andthe Raman Spectra has evaluated the transfer of charge to the matrix. Microhardness was performed to evaluate the influenceof the incorporation of CNTs in the matrix. The results obtained show that the incorporation of CNTs in the aluminummatrix increases the hardness in approximately 20% of the surface, in comparison with the control sample. The process ofincorporating CNTs into the aluminum matrix by solubilization is a promising, simple and inexpensive alternative to improvethe durability of the aluminum surface.