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Mortazavi SA, Haghani M, Vafapour H, Ghadimi-Moghadam A, Yarbakhsh H, Eslami J, Yarbakhsh R, Zarei S, Rastegarian N, Shams SF, Darvish L, Mohammadi S. Should Parents Allow Their Children Use Smartphones and Tablets? The Issue of Screen Time for Recreational Activities. J Biomed Phys Eng 2023; 13:563-572. [PMID: 38148959 PMCID: PMC10749417 DOI: 10.31661/jbpe.v0i0.535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2019] [Accepted: 08/23/2019] [Indexed: 12/28/2023]
Abstract
Previous research has shown that children are more vulnerable to the adverse effects of radiofrequency electromagnetic fields (RF-EMFs) and blue light emitted from digital screens compared to healthy adults. This paper presents the findings of a cross-sectional study conducted in Yasuj, Iran, to investigate the screen time habits of children and adolescents and its potential impact on their health. A total of 63 participants, including 44 boys and 19 girls, were randomly selected for the study. The results showed that the average daily screen time for the children was 87.38 minutes, with a standard deviation of 49.58. When examining the specific purposes of screen time, it was found that the children spent an average of 17.54 minutes per day on screens for school assignments, 70 minutes per day for recreational purposes, and 23.41 minutes per day for contacting family, friends, and relatives. Our study highlights that a significant portion of the children's screen time was allocated to recreational activities. We observed some differences in screen time between girls and boys. Boys had a slightly higher overall daily screen time, primarily driven by more recreational screen time. However, girls spent slightly more time on screens for school assignments. The screen time for social interactions was similar for both genders. Our findings on the cognitive performance of children with different levels of screen time will be published in a separate paper.
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Affiliation(s)
| | - Masoud Haghani
- Department of Radiology, School of Paramedical Sciences, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Hassan Vafapour
- Ionizing and Non-ionizing Radiation Protection Research Center (INIRPRC), Shiraz University of Medical Sciences, Shiraz, Iran
| | | | - Helia Yarbakhsh
- Department of Nutrition Sciences, School of Nutrition and Food Sciences, Larestan University of Medical Sciences, Larestan, Iran
| | - Jamshid Eslami
- Department of Anesthesiology, School of Nursing & Midwifery, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Reza Yarbakhsh
- Department of Computer Engineering, Sharif University, Tehran, Iran
| | - Sina Zarei
- Student Research Committee, School of Rehabilitation, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Niloofar Rastegarian
- Department of Speech Pathology, School of Rehabilitation, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Seyedeh Fateme Shams
- Clinical Research Development Unit, Valiasr Hospital, Fasa University of Medical Sciences, Fasa, Iran
| | - Leili Darvish
- MVLS College, The University of Glasgow, Glasgow, Scotland, UK
| | - Sahar Mohammadi
- Department of Radiology, School of Paramedical Sciences, Shiraz University of Medical Sciences, Shiraz, Iran
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Mortazavi SMJ, Mortazavi SAR, Paknahad M. Arabidopsis plants exposed to gamma radiation in two successive generations show a different oxidative stress response. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2017; 171:253-254. [PMID: 28131324 DOI: 10.1016/j.jenvrad.2016.12.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Accepted: 12/22/2016] [Indexed: 06/06/2023]
Affiliation(s)
- S M J Mortazavi
- Professor of Medical Physics, Medical Physics Department, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran; Ionizing and Non-ionizing Radiation Protection Research Center (INIRPRC), Shiraz University of Medical Sciences, Shiraz, Iran
| | - S A R Mortazavi
- Student of Research Committee, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Maryam Paknahad
- Assistant Professor of Oral and Maxillofacial Radiology, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
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Mortazavi SMJ, Darvish L, Abounajmi M, Zarei S, Zare T, Taheri M, Nematollahi S. Alteration of Bacterial Antibiotic Sensitivity After Short-Term Exposure to Diagnostic Ultrasound. IRANIAN RED CRESCENT MEDICAL JOURNAL 2015; 17:e26622. [PMID: 26732124 PMCID: PMC4698328 DOI: 10.5812/ircmj.26622] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/05/2015] [Revised: 03/27/2015] [Accepted: 04/14/2015] [Indexed: 12/03/2022]
Abstract
Background Many pathogenic bacteria show different levels of antibiotic resistance. Furthermore, a lot of hospital-acquired infections are caused by highly resistant or multidrug-resistant Gram-negative bacteria. According to WHO, patients with drug-resistant infections have higher morbidity and mortality. Moreover, patients infected with bacteria that are resistant to antibiotics considerably consume more healthcare resources. Objectives In this study, we explored a physical method of converting drug-resistant bacteria to drug-sensitive ones. Materials and Methods This is an in vitro case-control study, performed at the Ionizing and Non-ionizing Radiation Protection Research Center (INIRPRC), Shiraz University of Medical Sciences (SUMS), Shiraz, Iran in 2014. All experiments were carried out using Gram-negative bacteria Klebsiella pneumonia and E. coli and Gram-positive Staphylococcus aureus and Streptococcus group A, isolated from hospitalized patients. The bacterial strains were obtained from the Persian Type Culture Collection, IROST, Iran (Klebsiella pneumonia PTCC 1290) and Bacteriology Department of Shahid Faghihi Teaching Hospital, Shiraz, Iran (E. coli, Staphylococcus aureus, and Streptococcus group A). The bacteria in culture plates were exposed to diagnostic ultrasound using a MyLab70XVG sonography system for 5 minutes. Then, the bacteria were cultured on Mueller-Hinton agar and incubated at 35°C for 18 hours. Finally, antibiotic susceptibility test was performed and the inhibition zone in both control and exposed groups were measured. Three replicate agar plates were used for each test and the inhibition zones of the plates were recorded. Results Compared with the results obtained from unexposed bacteria, statistically significant variations of sensitivity to antibiotics were found in some strains after short-term exposure. In particular, we found major differences (making antibiotic-resistant bacteria susceptible or vice versa) in the diameters of inhibition zones in exposed and non-exposed samples of Klebsiella pneumonia and Streptococcus. Conclusions This study clearly shows that short-term exposure of microorganisms to diagnostic ultrasonic waves can significantly alter their sensitivity to antibiotics. We believe that this physical method of making the antibiotic-resistant population susceptible can open new horizons in antibiotic therapy of a broad range of diseases, including tuberculosis.
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Affiliation(s)
- Seyed Mohammad Javad Mortazavi
- Department of Medical Physics and Medical Engineering, School of Medicine, Shiraz University of Medical Sciences, Shiraz, IR Iran
- Department of Radiology, Faculty of ParaMedicine, Hormozgan University of Medical Sciences, Bandar Abbas, IR Iran
- Corresponding Authors: Seyed Mohammad Javad Mortazavi, Department of Medical Physics and Medical Engineering, School of Medicine, Shiraz University of Medical Sciences, Shiraz, IR Iran. Tel: +98-7112349332, Fax: +98-7112349332; +98-7112289113, E-mail: ; Leili Darvish, Department of Medical Physics and Medical Engineering, School of Medicine, Shiraz University of Medical Sciences, Shiraz, IR Iran. E-mail:
| | - Leili Darvish
- Department of Medical Physics and Medical Engineering, School of Medicine, Shiraz University of Medical Sciences, Shiraz, IR Iran
- Corresponding Authors: Seyed Mohammad Javad Mortazavi, Department of Medical Physics and Medical Engineering, School of Medicine, Shiraz University of Medical Sciences, Shiraz, IR Iran. Tel: +98-7112349332, Fax: +98-7112349332; +98-7112289113, E-mail: ; Leili Darvish, Department of Medical Physics and Medical Engineering, School of Medicine, Shiraz University of Medical Sciences, Shiraz, IR Iran. E-mail:
| | - Mohammad Abounajmi
- Department of Radiology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, IR Iran
| | - Samira Zarei
- Department of Microbiology, School of Medicine, Bushehr University of Medical Sciences, Bushehr, IR Iran
| | - Tahereh Zare
- Department of Medical Physics and Medical Engineering, School of Medicine, Shiraz University of Medical Sciences, Shiraz, IR Iran
| | - Mohammad Taheri
- Department of Microbiology, School of Medicine, Kerman University of Medical Sciences, Kerman, IR Iran
| | - Samaneh Nematollahi
- Department of Biostatistics, School of Medicine, Shiraz University of Medical Sciences, Shiraz, IR Iran
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