Arash Heidari is a fourth year Medical Student of Medical School of Tehran University of Medical Sciences, Tehran, Iran.
Nosocomial infections are a serious problem in health care centers and dramatically increase the morbidity and mortality of patients and pose costs on patients and health care. One of the most common causes of these infections is medical and therapeutically interventions, therefore, the role of doctors and medical students in the prevention of nosocomial infections is of particular importance. This study was carried out to assess medical students’ knowledge and practice of nosocomial infection in hospitals affiliated to Tehran Medical Science Universities (Tehran, Iran and Shahid Beheshti Medical Science Universities). In this descriptive study, 150 medical students (externship period) were selected randomly from three universities. Data were collected by self-reported questionnaire including questions on awareness of nosocomial infection and prevention, demographic characteristics and practice. Data was analyzed by SPSS software using descriptive and analytical statistical methods and Pearson correlation. Results showed that the mean scores of knowledge and practice were 58.22±13.66 (moderate) and 48.41±5.62 (poor) respectively. Results showed that there was no statistically significant relationship between medical students’ knowledge and their practice (p=0.10).There was a significant relationship between knowledge and academic year (P=0.01) and practice and clinical unit (P=0.04). There was no significant difference between knowledge level with age, sex, marital status, history of needle steak, history of hospitalization and relative’s hospitalization (p>0.05). The results showed that although the level of knowledge of medical students regarding to prevention of nosocomial infections is moderate but their practice is poor, therefore the practical training of students should be emphasized more than before.
My name is Kebena Gebeyehu Motora. I have studied Bachelor of Science in Chemistry at Jigjiga University from 2008–2011 and graduated on 2nd July, 2011. I have studied my Masters in Jimma University from Sep 2011 to Nov 2013 and graduated by masters of Science in Analytical Chemistry. After graduation I was employed at Mettu University and I have been working there as a lecturer and researcher until September 2017. Starting from September 2017, I am studying my Ph. D at National Taiwan University of Science and Technology and I will graduate this year.
Full-spectrum light-driven Ag3VO4/WO2.72 nanocomposites were prepared using a simple precipitation method. The nanocomposites were characterized via X-ray diffraction (XRD) analysis, field-emission scanning electron microscopy (FE-SEM), ultraviolet-visible (UV-Vis) spectroscopy, X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), photoluminescence (PL) spectroscopy, Brunauer-Emmett-Teller (BET) analysis, and electrochemical impedance spectroscopy (EIS). The photocatalytic performance of the nanocomposites for the photodegradation of methylene blue (MB) and Rhodamine B (Rh B) were examined. The Ag3VO4/WO2.72 nanocomposites exhibited outstanding photocatalytic performance for the photodegradation of Rh B and MB, and they were stable under irradiation with UV, visible, near-infrared (NIR), and solar light. A nanocomposite prepared with Ag3VO4 and WO2.72 in a 1:2 molar ratio (AgV-WO-2) exhibited particularly high photodegradation efficiency. AgV-WO-2 photodegraded 99% of the Rh B and 98% of the MB in aqueous solutions under solar and visible light. Under UV light, 96% of the Rh B and 89% of the MB were degraded, while 40% of the Rh B and 38% of the MB in solutions irradiated with NIR light were removed. The photocatalytic performance of the nanocomposites for the photoreduction of chromium (VI) was also studied. AgV-WO-2 exhibited a photoreduction efficiency of 90% under solar light irradiation. The activities of the AgV-WO-2 nanocomposite for the photodegradation of Rh B and the photoreduction of Cr (VI) were compared to those reported for other catalysts. The photocatalytic activity of the Ag3VO4/WO2.72 nanocomposite was better. It is thus a promising photocatalyst for the removal of Rh B, MB, and chromium (VI).