a novel acrylic acid-functionalized fe3o4 magnetic nanoparticle with a core-shell structure was developed for utilization as a heterogeneous organosuperacid in chemical transformations. the structural, surface, and magnetic characteristics of the nanosized catalyst were investigated by various techniques such as transmission electron microscopy (tem), thermogravimetric analysis (tga), and ft-ir...

در این پژوهش نحوه ساخت نانوکامپوزییت eva/ag و اثر ضد میکروبی آن در درصدهای مختلف نانو ذره نقره مورد بررسی قرار گرفته است.نانوکامپوزیت حاصل از نطر شکل شناختی ، اندازه ذرات، ساختمان شیمیایی ، با استفاده از تستهای sem(scanning electrou microscopy)،tem (transmission electron microscope) ، xrd (x-ray fluorescence spectroscopy) ،ftir (fourier transform infrared spectroscopy) مورد ارزیابی قرار گرفت. د...

Introduction: AIDS is the most serious health problem and the most deadly infectious disease in ‎the present century. Emerging of disease and lack of sufficient awareness about the disease can ‎easily expose the adolescents to the risk of disease. Increased knowledge and change in inaccurate ‎beliefs and behaviors are the best way for prevention of disease. ‎ Objective: This ...

Background and purpose: Crimean Congo Hemorrhagic Fever (CCHF) is a dangerous viral zoonotic disease. Ticks are the main vector which transmit CCHF virus from livestock to human. The present study was done to provide a comprehensive database on major ticks in the CCHF virus transmission and their geographical dispersal in Iran. This would be of great benefit in planning for intelligent control ...

Reducing the consequences of the Covid 19 outbreak requires a systematic approach. The most effective way to prevent this disease is to cut off the virus transmission chain. In this letter, a systemic model for the management of the Covid 19 crisis is presented based on the bow-tie analysis model and the concept of Layers of Protection Analysis from the perspective of safety engineering. In thi...

Background: Crimean-Congo Hemorrhagic Fever (CCHF) is a tick-borne, viral disease that may also be transmitted through person-to-person transmission by exposure to infected body fluids. It causes a severe disease in humans with high mortality rates. Case presentation: Here we present two cases of CCHF patients with sudden onset of lethargy, fever, nausea, vomiting, headache, and hemorrhagic ma...

Severe Acute Respirators;apos Syndrome (SARS), an emerging infectious disease first reported from the Chinese province of Guangdong, has already caused one worldwide outbreak. The syndrome spread across the globe by travelers. The etiologic agent was unknown at the beginning, but because of the rapid spread of the disease, an infectious agent with high transmission potency was suspected. Later ...