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- 저자 : Abdullah Reda (검색결과 3 건)
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Amr Ehab El-Qushayri,Abdullah Dahy,Abdullah Reda,Mariam Abdelmageed Mahmoud,Sarah Abdel Mageed,Ahmed Mostafa Ahmed Kamel,Sherief Ghozy 한국역학회 2021 Epidemiology and Health Vol.43 No.-
OBJECTIVES: This study aimed to examine the prevalence of psychiatric disorders among Egyptian healthcare workers (HCWs) during the coronavirus disease 2019 (COVID-19) pandemic. METHODS: Six databases were searched for relevant papers. The quality of the selected articles was measured using the Na-tional Institute of Health quality assessment tool. We used a fixed-effects model when there was no heterogeneity and a ran-dom-effects model when there was heterogeneity. RESULTS: After screening 197 records, 10 studies were ultimately included. Anxiety was the most commonly reported psychi-atric disorder among HCWs, with a prevalence of 71.8% (95% confidence interval [CI], 49.4 to 86.9), followed by stress (66.6%; 95% CI, 47.6 to 81.3), depression (65.5%; 95% CI, 46.9 to 80.3), and insomnia (57.9%; 95% CI, 45.9 to 69.0). As measured using the 21-item Depression, Anxiety, and Stress Scale, the most common level of severity was moderate for depression (22.5%; 95% CI, 19.8 to 25.5) and stress (14.5%; 95% CI, 8.8 to 22.9), while high-severity anxiety was more common than other levels of se-verity (28.2%; 95% CI, 3.8 to 79.6). CONCLUSIONS: The COVID-19 pandemic has had a negative effect on Egyptian HCWs’ psychological well-being. More psychological support and preventive measures should be implemented to prevent the further development of psychiatric ill-ness among physicians and other HCWs.
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Mohamed Abdel Salam,Reda M. El-Shishtawy,Abdullah Y. Obaid 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.5
Multiwalled carbon nanotubes (MWCNTs) were physically mixed with biopolymer chitin and magnetite to form a magnetic nanocomposite. The produced MWCNTS/chitin/magnetite (MCM) nanocomposite was characterized using scanning electron microscopy and surface-area analysis, and the magnetic properties were measured using a vibrating-sample magnetometer. The results revealed homogenous distribution of the chitin and magnetite nanoparticles within the MWCNTs in the MCM nanocomposite. The MCM nanocomposite was used to study the removal/adsorption of the well-known organic dye Rose Bengal (RB). The effect of different adsorption parameters was studied and optimized. The adsorption process was studied at different temperatures and the results were analyzed kinetically. Results revealed that the adsorption followed the pseudo-second-order kinetic model. Also, it was found that the adsorption of RB occurred in different steps including the diffusion of RB through the boundary layer to the external surface of the MCM nanocomposite, intraparticle diffusion, and adsorption of RB through the MCM nanocomposite particles. The adsorption was analyzed thermodynamically and results revealed spontaneity of the adsorption as the DG8 value was negative and endothermic in nature as the DH8 value was positive, and associated with the increase in the randomness as the DS8 value was positive.
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Mohamed Rehan,Mehrez E. El-Naggar,Abdullah M. Al-Enizi,Asma A. Alothman,Ayman Nafady,Reda M. Abdelhameed 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.97 No.-
In this study, to impart silkfibers with excellent coloration, UV-protection, antimicrobial activity, as wellas creatinine adsorption from artificial blood, silkfibers were designed via facile fabrication approach. These diverse properties were introduced by in-situ incorporation of nanoparticles based on either silver(AgNPs) or gold (AuNPs) as well as bimetallic (Ag-AuNPs) onto silkfibers using an eco-friendly, effectiveone-pot process. The proteins present in the silkfibers acted as a redox-active bio-template to reduce theAg(I) and Au(III) ions to their zero-valent state with simultaneous deposition of the generatednanoparticles onto the silkfiber surfaces. The obtained results clearly indicated that both AgNPs andAuNPs colored the silkfibers with brown and red color, respectively, thereby affirming the deposition ofthese metallic NPs onto and inside the surface of silkfibers as S/Ag-AuNPs. Significantly, the preparedcolored silkfibers exhibited excellent antimicrobial and cytotoxicity activities against differentpathogenic microbes as well as very good UV protection properties. Moreover, the results attestedthat the as prepared S/AgNPs and S/AuNPsfibers have good adsorption potential with maximaladsorption capacity of creatinine in artificial blood was found to be 94.2 mg/g for S/AuNPs sample, whichis 1.55 times greater than that of silkfibers.
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