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Article ; Online: Assessment of the potential radiation hazards posed by Nubian sandstone, Egypt.

Gawad, Ahmed E Abdel / Eliwa, Hassan / Masoud, Masoud S / Khandaker, Mayeen Uddin / Hanfi, Mohamed Y

2023 Volume 13, Issue 1, Page(s) 21202

Abstract: The study found that the activity concentrations of the ... ...

Abstract	The study found that the activity concentrations of the radionuclides
Language	English
Publishing date	2023-12-01
Publishing country	England
Document type	Journal Article
ZDB-ID	2615211-3
ISSN	2045-2322 ; 2045-2322
ISSN (online)	2045-2322
ISSN	2045-2322
DOI	10.1038/s41598-023-47150-4
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Degradation and energy performance evaluation of mono-crystalline photovoltaic modules in Egypt.

Atia, Doaa M / Hassan, Amal A / El-Madany, Hanaa T / Eliwa, Aref Y / Zahran, Mohamed B

Scientific reports

2023 Volume 13, Issue 1, Page(s) 13066

Abstract: Degradation reduces the capability of solar photovoltaic (PV) production over time. Studies on PV module degradation are typically based on time-consuming and labor-intensive accelerated or field experiments. Understanding the modes and methodologies of ... ...

Abstract	Degradation reduces the capability of solar photovoltaic (PV) production over time. Studies on PV module degradation are typically based on time-consuming and labor-intensive accelerated or field experiments. Understanding the modes and methodologies of degradation is critical to certifying PV module lifetimes of 25 years. Both technological and environmental conditions affect the PV module degradation rate. This paper investigates the degradation of 24 mono-crystalline silicon PV modules mounted on the rooftop of Egypt's electronics research institute (ERI) after 25 years of outdoor operation. Degradation rates were determined using the module's performance ratio, temperature losses, and energy yield. Visual inspection, I-V characteristic measurement, and degradation rate have all been calculated as part of the PV evaluation process. The results demonstrate that the modules' maximum power ([Formula: see text]) has decreased in an average manner by 23.3% over time. The degradation rates of short-circuit current ([Formula: see text]) and maximum current ([Formula: see text]) are 12.16% and 7.2%, respectively. The open-circuit voltage ([Formula: see text]), maximum voltage ([Formula: see text]), and fill factor ([Formula: see text]) degradation rates are 2.28%, 12.16%, and 15.3%, respectively. The overall performance ratio obtained for the PV system is 85.9%. After a long time of operation in outdoor conditions, the single diode model's five parameters are used for parameter identification of each module to study the effect of aging on PV module performance.
Language	English
Publishing date	2023-08-11
Publishing country	England
Document type	Journal Article
ZDB-ID	2615211-3
ISSN	2045-2322 ; 2045-2322
ISSN (online)	2045-2322
ISSN	2045-2322
DOI	10.1038/s41598-023-40168-8
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Assessment of the potential radiation hazards posed by Nubian sandstone, Egypt

Ahmed E. Abdel Gawad / Hassan Eliwa / Masoud S. Masoud / Mayeen Uddin Khandaker / Mohamed Y. Hanfi

Scientific Reports, Vol 13, Iss 1, Pp 1-

2023 Volume 12

Abstract: Abstract The study found that the activity concentrations of the radionuclides 238U, 232Th and 40K in the sandstone are 32 ± 13, 29.6 ± 12.2, and 132.6 ± 86.4 Bq kg−1, respectively. These values are lower than the reported worldwide limits of 33, 45, and ...

Abstract	Abstract The study found that the activity concentrations of the radionuclides 238U, 232Th and 40K in the sandstone are 32 ± 13, 29.6 ± 12.2, and 132.6 ± 86.4 Bq kg−1, respectively. These values are lower than the reported worldwide limits of 33, 45, and 412 Bq kg−1. According to the present study, the absorbed dose rate (Dair), the annual effective dose, and the excess life time cancer were all found to be below the worldwide mean. Pearson correlation, PCA, and HCA were used to analyze the data and identify patterns in the relationship between radionuclides and radiological hazards. A statistical analysis of the sandstones showed that the radioactive elements 238U, 232Th and 40K are the main contributors to the radioactive risk. The study suggests that the sandstone is safe to use. The levels of radioactivity are not high enough to pose a risk to human health.
Keywords	Medicine ; R ; Science ; Q
Language	English
Publishing date	2023-12-01T00:00:00Z
Publisher	Nature Portfolio
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Current situation of viral hepatitis in Egypt.

Elbahrawy, Ashraf / Ibrahim, Marwa K / Eliwa, Ahmed / Alboraie, Mohamed / Madian, Ali / Aly, Hussein Hassan

Microbiology and immunology

2021 Volume 65, Issue 9, Page(s) 352–372

Abstract: An estimated 8-10 million people suffer from viral hepatitis in Egypt. Hepatitis A virus (HAV) and hepatitis E virus (HEV) are the major causes of viral hepatitis in Egypt as 50% or more of the Egyptian population are already exposed to HAV infection by ... ...

Abstract	An estimated 8-10 million people suffer from viral hepatitis in Egypt. Hepatitis A virus (HAV) and hepatitis E virus (HEV) are the major causes of viral hepatitis in Egypt as 50% or more of the Egyptian population are already exposed to HAV infection by the age of 15. In addition, over 60% of the Egyptian population test seropositive for anti-HEV in the first decade of life. HEV mainly causes self-limiting hepatitis; however, cases of fulminant hepatitis and liver failure were reported in Egypt. Hepatitis B virus (HBV), hepatitis C virus (HCV), and hepatitis D virus (HDV) are the main causes of chronic hepatitis, liver cirrhosis, and liver cancer (hepatocellular carcinoma [HCC]) in Egypt. Globally, Egypt had the highest age-standardized death rate due to cirrhosis from 1990 to 2017. The prevalence rate of HBV (1.3%-1.5%) has declined after national infantile immunization. Coinfection of HBV patients with HDV is common in Egypt because HDV antibodies (IgG) vary in range from 8.3% to 43% among total HBV patients. After the conduction of multiple national programs to control HCV infection, a lower rate of HCV prevalence (4.6%) was recently reported. Data about the incidence of HCV after treatment with direct antiviral agents (DAAs) are lacking. An HCC incidence of 29/1000/year in cirrhotic patients after DAA treatment is reported. A higher rate of infiltrative pattern among HCC patients after DAA treatment is also recognized. Viral hepatitis is one of the major public health concerns in Egypt that needs more attention and funding from health policymakers.
MeSH term(s)	Antiviral Agents/therapeutic use ; Carcinoma, Hepatocellular/epidemiology ; Egypt/epidemiology ; Hepatitis B ; Hepatitis, Viral, Human/epidemiology ; Humans ; Liver Neoplasms/epidemiology
Chemical Substances	Antiviral Agents
Language	English
Publishing date	2021-08-21
Publishing country	Australia
Document type	Journal Article ; Review
ZDB-ID	224792-6
ISSN	1348-0421 ; 0385-5600
ISSN (online)	1348-0421
ISSN	0385-5600
DOI	10.1111/1348-0421.12916
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Article: Dexamethasone in severe COVID-19 infection: A case series.

Hassan, Mohamed Eliwa / Hasan, Hasan Msn / Sridharan, Kannan / Elkady, Adel / ElSeirafi, Mohamed Ma

Respiratory medicine case reports

2020 Volume 31, Page(s) 101205

Abstract: Evidence supporting the use of dexamethasone in severe COVID-19 patients is emerging. In this case series, we share our experience in using dexamethasone in five COVID-19 infected patients with acute respiratory distress syndrome. ...

Abstract	Evidence supporting the use of dexamethasone in severe COVID-19 patients is emerging. In this case series, we share our experience in using dexamethasone in five COVID-19 infected patients with acute respiratory distress syndrome.
Keywords	covid19
Language	English
Publishing date	2020-08-28
Publishing country	England
Document type	Case Reports
ZDB-ID	2666110-X
ISSN	2213-0071
ISSN	2213-0071
DOI	10.1016/j.rmcr.2020.101205
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Article ; Online: Dexamethasone in severe COVID-19 infection

Mohamed Eliwa Hassan / Hasan MSN. Hasan / Kannan Sridharan / Adel Elkady / Mohamed MA. ElSeirafi

Respiratory Medicine Case Reports, Vol 31, Iss , Pp 101205- (2020)

A case series

2020

Abstract	Evidence supporting the use of dexamethasone in severe COVID-19 patients is emerging. In this case series, we share our experience in using dexamethasone in five COVID-19 infected patients with acute respiratory distress syndrome.
Keywords	Dexamethasone ; Corticosteroids ; COVID-19 ; Coronavirus ; Diseases of the respiratory system ; RC705-779 ; covid19
Language	English
Publishing date	2020-01-01T00:00:00Z
Publisher	Elsevier
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article: Causative bacteria of ventilator-associated pneumonia in intensive care unit in Bahrain: Prevalence and antibiotics susceptibility pattern.

Hassan, Mohamed Eliwa / Al-Khawaja, Safaa Abdulaziz / Saeed, Nermin Kamal / Al-Khawaja, Sana Abdulaziz / Al-Awainati, Mahmood / Radhi, Sara Salah Yusuf / Alsaffar, Mohamed Hameed / Al-Beltagi, Mohammed

World journal of critical care medicine

2023 Volume 12, Issue 3, Page(s) 165–175

Abstract: Background: Ventilator-associated pneumonia (VAP) is defined as pneumonia that occurs two calendar days following endotracheal intubation or after that. It is the most common infection encountered among intubated patients. VAP incidence showed wide ... ...

Abstract	Background: Ventilator-associated pneumonia (VAP) is defined as pneumonia that occurs two calendar days following endotracheal intubation or after that. It is the most common infection encountered among intubated patients. VAP incidence showed wide variability between countries. Aim: To define the VAP incidence in the intensive care unit (ICU) in the central government hospital in Bahrain and review the risk factors and the predominant bacterial pathogens with their antimicrobial susceptibility pattern. Methods: The research was a prospective cross-sectional observational study over six months from November 2019 to June 2020. It included adult and adolescent patients (> 14 years old) admitted to the ICU and required intubation and mechanical ventilation. VAP was diagnosed when it occurred after 48 h after endotracheal intubation using the clinical pulmonary infection score, which considers the clinical, laboratory, microbiological, and radiographic evidence. Results: The total number of adult patients admitted to the ICU who required intubation and mechanical ventilation during the study period was 155. Forty-six patients developed VAP during their ICU stay (29.7%). The calculated VAP rate was 22.14 events per 1000 ventilator days during the study period, with a mean age of 52 years ± 20. Most VAP cases had late-onset VAP with a mean number of ICU days before the development of VAP of 9.96 ± 6.55. Gram-negative contributed to most VAP cases in our unit, with multidrug-resistant Acinetobacter being the most identified pathogen. Conclusion: The reported VAP rate in our ICU was relatively high compared to the international benchmark, which should trigger a vital action plan for reinforcing the implementation of the VAP prevention bundle.
Language	English
Publishing date	2023-06-09
Publishing country	United States
Document type	Journal Article
ISSN	2220-3141
ISSN	2220-3141
DOI	10.5492/wjccm.v12.i3.165
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Dexamethasone in severe COVID-19 infection

Hassan, Mohamed Eliwa / Hasan, Hasan MSN. / Sridharan, Kannan / Elkady, Adel / ElSeirafi, Mohamed MA.

Respiratory Medicine Case Reports

A case series

2020 Volume 31, Page(s) 101205

Keywords	Pulmonary and Respiratory Medicine ; covid19
Language	English
Publisher	Elsevier BV
Publishing country	us
Document type	Article ; Online
ZDB-ID	2666110-X
ISSN	2213-0071
ISSN	2213-0071
DOI	10.1016/j.rmcr.2020.101205
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article: Dexamethasone in severe COVID-19 infection: A case series

Hassan, Mohamed Eliwa / Hasan, Hasan Msn / Sridharan, Kannan / Elkday, Adel / ElSeirafi, Mohamed Ma

Respir Med Case Rep

Abstract	Evidence supporting the use of dexamethasone in severe COVID-19 patients is emerging. In this case series, we share our experience in using dexamethasone in five COVID-19 infected patients with acute respiratory distress syndrome.
Keywords	covid19
Publisher	WHO
Document type	Article
Note	WHO #Covidence: #733633
Database	COVID19

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Article ; Online: Radiological Investigation on Sediments

Ahmed E. Abdel Gawad / Khaled Ali / Hassan Eliwa / M. I. Sayyed / Mayeen Uddin Khandaker / David A. Bradley / Hamid Osman / Basem H. Elesawy / Mohamed Y. Hanfi

Applied Sciences, Vol 11, Iss 11884, p

A Case Study of Wadi Rod Elsayalla the Southeastern Desert of Egypt

2021 Volume 11884

Abstract: The presence of heavy radioactive minerals in the studied granitoids from which the Wadi sediments leads to the study of the exposure to emitted gamma rays from the terrestrial radionuclides, such as 238 U, 232 Th, and 40 K. The geological study revealed ...

Abstract	The presence of heavy radioactive minerals in the studied granitoids from which the Wadi sediments leads to the study of the exposure to emitted gamma rays from the terrestrial radionuclides, such as 238 U, 232 Th, and 40 K. The geological study revealed that the Wadi sediments derived from the surrounding granitoids, such as syenogranite, alkali feldspar granite, and quartz syenite. The mineral analysis confirmed that the granitoids were enriched with radioactive minerals, such as uranothorite as well as monazite, zircon, yttrocolumbite, and allanite. The mean activity of the 238 U, 232 Th, and 40 K concentrations are 62.2 ± 20.8, 84.2 ± 23.3, and 949.4 ± 172.5 Bq kg −1 , respectively, for the investigated Wadi sediments, exceeding the reported limit of 33, 45 and 412 Bq kg −1 , respectively. Public exposure to emitted gamma radiation is detected by estimating many radiological hazard indices, such as the radium equivalent content (Ra eq ), external and internal hazard indices (H ex and H in ), annual effective dose (AED), annual gonadal dose equivalent (AGDE), and excess lifetime cancer (ELCR). The obtained results of the radiological hazards parameters showed that public exposure to emitted gamma radiation can induce various dangerous health effects. Thus, the application of the investigated sediments in different building materials and infrastructures fields is not safe. A multivariate statistical analysis (MSA) was applied to detect radionuclide correlations with the radiological hazard parameters estimated in the granite samples.
Keywords	Wadi sediments ; heavy minerals ; natural radionuclides ; radiological hazard ; Technology ; T ; Engineering (General). Civil engineering (General) ; TA1-2040 ; Biology (General) ; QH301-705.5 ; Physics ; QC1-999 ; Chemistry ; QD1-999
Subject code	333
Language	English
Publishing date	2021-12-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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