“Gamma Rays Interactions on Optical, FTIR and ESR Spectra of Alkaline Earth Binary Borate Glasses”
Eman
Abou Hussein
Radiation Chemistry department,National Center for Radiation Research and Technology, Atomic Energy Authority, P. O. Box 8029, Nasr City, Cairo11371, Egypt.
author
text
article
2020
eng
Abstract Alkaline earth binary borate glasses with the composition of (100-x) B2O3 + X (BaO, CaO, SrO) where x=22, 32 or 42 wt. % were prepared by melting annealing technique. Some of their physical and spectroscopic properties have been studied before and after gamma irradiation such as Density, oxygen packing density, molar and specific volumes, as well as optical UV-visible absorption, optical energy gap (Eopt), FTIR and ESR spectroscopy. The UV-visible spectra show a shifting of the optical edge to higher wavelengths with increasing the polarizability of the introduced modifier ion and the dose of gamma radiation. FTIR spectra show the vibrational bands of the structural borate groups; the triangular BO3 and tetrahedral BO4 units at 1200-1600 cm-1 and 800-1200 cm-1 respectively. ESR spectra show a constant behavior of the glasses at the low doses of radiation up to 60 kGy but show high effect of radiation at the higher doses due to the formation of more paramagnetic defects and free radicals.
Arab Journal of Nuclear Sciences and Applications
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
1110-0451
53
v.
2
no.
2020
1
18
https://ajnsa.journals.ekb.eg/article_79567_ecdfe9f4a864bb87c2a452fabd2022df.pdf
dx.doi.org/10.21608/ajnsa.2020.17460.1278
Oral N-Acetyl Cysteine Administration Improved Oxidative Status in Medical Radiation Workers
Marwa
Abou El-Eneen
Radiation Science Department, Medical Research Institute, Alexandria University, Egypt
author
Mohamed
Morsi
Radiation Sciences, Medical Research Institute, Alexandria University, Alexandria, Egypt.
author
Mostafa
Soula
Radiology Department, Qotour Central Hospital, El Gharbeya, Egypt.
author
text
article
2020
eng
Abstract: Medical radiation workers (MRWs) are chronically exposed to low doses of ionizing radiation which has been reported to cause deleterious health effects result from oxidative stress. N-acetyl cysteine (NAC) is the promise choice for treating disorders resulted from excessive production of reactive oxygen species (ROS). The aim of the study was to investigate the role of NAC in protecting medical workers occupationally exposed to low doses of ionizing radiation (IR) via detecting some oxidative stress markers and comparing the results with controls. The studied participants divided into healthy MRWs administered NAC effervescent 600 mg, as a radioprotector (n=50) and healthy non-radiation workers as control group (n=50). Two blood samples were taken from MRWs; before and after taking of NAC and one blood sample from the control group to detect reduced erythrocyte glutathione (GSH), plasma malondialdehyde (MDA) and advanced oxidation protein products (AOPPs). Erythrocyte GSH levels were significantly decreased in MRWs group than control group and significantly increased after oral administration of NAC. Plasma levels of MDA and AOPPs in MRWs group were significantly increased than control group, while their levels were significantly reduced after taking NAC. These findings suggest using of NAC as a promising radioprotector in medical workers occupationally exposed to low dose of IR to reduce the resulted oxidative stress.
Arab Journal of Nuclear Sciences and Applications
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
1110-0451
53
v.
2
no.
2020
19
25
https://ajnsa.journals.ekb.eg/article_79568_5e9d10ac58202f138b7065d0dc949459.pdf
dx.doi.org/10.21608/ajnsa.2020.17667.1279
Zirconium and Hafnium Separation by Novel Green Emulsion Liquid Membrane Containing an Environmentally Benign Diluent
Zeinab
Ismail
Hot Laboratories and Waste Management Center, Atomic Energy Authority
author
Hisham
Aly
Egyptian Atomic Energy Authority
author
text
article
2020
eng
Green liquid emulsion membrane (LEM) wasdeveloped for separation of zirconium and hafnium from nitric acid medium. Themembrane is based on the use of CYANEX-272 diluted with corn oil (greendiluent) as a carrier, span 80 as a surfactant and citric acid as a strippingagent. The factors affecting the stability of the LEM were investigated underchosen conditions. The parameters affecting the permeation of Zr and Hf fromnitrate medium were also studied. The metal ion content in the inner phaseobtained by demulsifying the loaded CC-LEM using the freeze-thaw method is 22.8g/l Zr and 2.05 mg/l Hf i.e. the contamination of the recovered Zr is 89.91 mgHf/ kg Zr which is below the limit for the use of zirconium in nuclearapplications.
Arab Journal of Nuclear Sciences and Applications
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
1110-0451
53
v.
2
no.
2020
26
35
https://ajnsa.journals.ekb.eg/article_77512_2e6a450f6dc237d9ca10ee98c8ee6e5c.pdf
dx.doi.org/10.21608/ajnsa.2020.77512
Study of interleukin-18 ( IL18 ) and high sensitive C - reactive protein ( CRP ) in type 2 diabetes ( T2D ) with or without obesity
Wahiba
Kamel
Internal medicine department ,Faculty of Medicine for girls, Al-Azhar University,Cairo,Egypt
author
walaa
elbaz
Internal medicine department,Faculty of medicine ,Alazhar university for girls, Cairo ,Egypt
author
Azza
Emam
Health Radiation Research Department, NCRRT.
author
Amany
Abdullah
Internal medicine department,Faculty of Medicine for girls, Al-Azhar University ,Cairo, Egypt
author
abeer
elnaggar
Internal medicine department, National center for radiation research and technology NCRRT,Cairo,Egypt
author
text
article
2020
eng
Abstract Background: Both diabetes and obesity are associated with chronic low-grade inflammation. IL-18 is a cytokine that stimulates various cell types and has pleiotropic functions. It is elevated in obesity, metabolic syndrome and type 2 diabetes (T2D). Aim of study: to test the hypothesis that serum level of IL-18 and high sensitive C-reactive protein can be used as markers for presence of chronic low-grade inflammation in type 2 diabetes more than in obesity per se. Subjects and methods: The study recruited 80 subjects. They comprised 20 diabetic obese cases (DM-OB group), 20 diabetic non-obese cases (DM-NOB group), : 20 non-diabetic obese cases (NDM-OB group) and 20 non-diabetic non-obese subjects (NDM-NOB group). All participants were submitted to careful history taking, through clinical investigations and laboratory assessment Results: hs-CRP was significantly highest in DMOB group (3.4±0.5 mg/dl) followed by NDM-OB group (2.9±0.4 mg/dl) followed by DM-NOB group (2.3±0.3 mg/dl) and least in NDM-NOB (0.8±0.3 mg/dl). Also, it was found that serum IL-18 was significantly highest in DMOB group (397.8±33.9 pg/mL) followed by NDM-OB (368.8±26.7 pg/mL) group followed by DM-NOB group (335.9±18.4 pg/mL) and least in NDM-NOB group (281.1±22.9 pg/mL). Serum IL-18 levels are directly correlated with BMI, waist circumference, hip circumference and waist/hip ratio in all the studied groups and with HbA1c in the diabetic groups. Conclusions: Serum IL-18 and hs-CRP are related to diabetes and obesity. They are associated with dyslipidemia, poor glycemic control, insulin resistance and impaired liver and renal functions.
Arab Journal of Nuclear Sciences and Applications
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
1110-0451
53
v.
2
no.
2020
36
45
https://ajnsa.journals.ekb.eg/article_79801_58d00b5e76cf7d069e6cf62c34a1364f.pdf
dx.doi.org/10.21608/ajnsa.2020.14631.1231
Characteristics of biological and non-biological aerosol particles in indoor environment and their inhalable fractions in the human lung
Mona
Moustafa
Physics department, faculty of science, Minia university, El-Minia,Egypt
author
text
article
2020
eng
Air quality of public buildings is an important to assess human health. School and university buildings represent an important category of indoor environments. This study aimed to evaluate the concentration and size distribution of fungal and non-biological aerosol particles in classrooms of Minia university, Egypt. In addition, the inhalable fractions were determined and indoor exposure dose (IED) of fungi and aerosols were estimated for the students. A six-stage Andersen impactor was used for collecting the fungal particles and Berner cascade impactor was used for sampling the non-biological aerosol particles. indoor average concentration of fungi was 307±102 CFU/m3. The most frequently isolated genera were Aspergillus niger with concentration 175±85 CFU/m3 representing about 57% of the of the total collected fungi. Aspergillus flavus represents about 31% of the total fungi with concentration 96±32 CFU/m3. Low concentration 36 ±12 CFU/m3 of Penecillium was investigated representing only 12% of the total collected fungi. Mean concentration of non-biological aerosols was 442±99 µg/m3. The concentration of airborne fungal aerosol particles were lower than the World Health Organization guide line While the corresponding concentration of non-biological aerosols exceeds WHO limit. Most of the collected fungal particles were found in the inhalable size range (< 5µm) where inhalable fraction of fungi represents 84% of the total collected particles while inhalable fraction of non- biological aerosols represents 92% of the total collected particles. Size distributions of biological and non-biological aerosols were bimodal in nature. IED of fungi was 25.6 CFU/kg While the IED of non-biological aerosols was 37 CFU/kg.
Arab Journal of Nuclear Sciences and Applications
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
1110-0451
53
v.
2
no.
2020
46
55
https://ajnsa.journals.ekb.eg/article_79802_555b5fe081eb2cb0504b357d21f42e60.pdf
dx.doi.org/10.21608/ajnsa.2019.14716.1233
Effect of tilting angle on natural convection heat transfer from a cylinder suspended in stagnant water
Hesham
Elbakhshawangy
Reactor department, Egyptian Atomic Energy Authority, Cairo, Egypt
author
text
article
2020
eng
Natural convection heat transfer from a cylinder suspended in water at different tilting angle has been analyzed numerically by varying the Rayleigh number (Ra) in laminar regime (104 ≤ Ra ≤ 108). The numerical analysis is carried out at different tilting angles in the range from 0 to 90 from vertical position using Ansys 15.0- Fluent computer code. The temperature and velocity contours as well as average Nu and surface temperature have been obtained at different Ra for each tilting angle. It has been found that the average Nu increase while the average surface temperature decrease with the increase in Ra for all of the cases. By increasing the tilting angle from the vertical position, the average Nu increases whereas the average surface temperature decreases until a tilting angle of 45o. Further increase in the tilting angle results in decrease in the average Nu, whereas average surface temperature changes slightly. A unique correlation relating Nu with Ra for natural convection from cylinder inclined at any arbitrary angle was developed.
Arab Journal of Nuclear Sciences and Applications
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
1110-0451
53
v.
2
no.
2020
56
67
https://ajnsa.journals.ekb.eg/article_79803_365c98c0e9ccade9c100b4edd37854ab.pdf
dx.doi.org/10.21608/ajnsa.2020.15243.1244
Therapeutic Role of Folic Acid Loaded Magnetic Nanoparticles Against Gamma-Irradiation Hazards in Rats
Eman
Sobeh
Department of Biological Applications, Nuclear Research Center, Atomic Energy Authority, Egypt
author
Sami
Hussein
Department of Biochemistry and clinical Biochemistry, Faculty of Veterinary Medicine, Benha University
author
Hussein
Abdelmaksod
Department of Biochemistry and clinical Biochemistry, Faculty of Veterinary Medicine, Benha University
author
Hisham
Saleh
Department of Biological Applications, Nuclear Research Center, Atomic Energy Authority, Egypt
author
Walaa
Hassanin
Dept. of biological applications, Nuclear Research Center, Egyptian Atomic Energy Authority, Egypt
author
text
article
2020
eng
Gamma radiation produces numerous biological perturbations in cells by direct ionization of DNA and cellular targets and by indirect effect through damage by free radical production. The present study has been carried out to investigate the possible therapeutic effect of folic acid loaded magnetic nanoparticles through injection after whole body gamma irradiation. Results showed that whole body gamma irradiation of rats at 6Gy (single dose) induced significant increase in DNA damage (P < 0.05) that was indicated by increase in tail length, tail DNA% and tail moment as compared to control group. And significant increase in the hepatic cholesterol and triglycerides levels was observed after three weeks post-irradiation. Administration of folic acid loaded magnetic iron oxide (Fe3O4) after irradiation induced significant improvement of the DNA damage and hepatic cholesterol and triglyceride level. These results indicate the possible role of folic acid loaded MNPs as a therapeutic agent against the genetic damage caused by ionizing radiation.
Arab Journal of Nuclear Sciences and Applications
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
1110-0451
53
v.
2
no.
2020
68
77
https://ajnsa.journals.ekb.eg/article_79804_2e5320114e7b85c1435e9cefa1340242.pdf
dx.doi.org/10.21608/ajnsa.2020.15937.1255
Linearized Mathematical Model for PWR Dynamics Simulation
Nehad
Osman
Assistant Lecturer (Electrical Engineer)
Nuclear Safety Engineering Department
Egyptian Nuclear and Radiological Regulatory Authority
Nasr City P.O. Box7551, Cairo, Egypt.
author
text
article
2020
eng
A linearized mathematical model for the pressurized water reactor (PWR) core dynamics is presented based on conservation of energy and mass balance. The core and coolant system are treated as a lumped parameter while considering the delayed neutron effect. The developed model is controlled by negative feedback reactivity from the coefficients of reactivity in the fuel and reactor coolant. The model state variables are linearized first order differential equations with a steady state initial value and put in state space using Matlab/Simulink. The reactor core dynamic response is investigated through transients introduced to the core model inlets represented in external reactivity insertion eg. (0.001 Δk/k), 10% step decrease in core flow rate and 10 oF step decrease in core inlet coolant temperature. The simulation results demonstrated the role of feedback reactivity form coolant temperature and Doppler Effect in stabilizing the core power and affecting the steady state values of core variables.
Arab Journal of Nuclear Sciences and Applications
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
1110-0451
53
v.
2
no.
2020
78
86
https://ajnsa.journals.ekb.eg/article_79805_0b28caa76ae44e08f0b773f7234b8748.pdf
dx.doi.org/10.21608/ajnsa.2019.18780.1290
The Effect of Simple Vertical Fraction on Diffusion Equation with Deposition
khaled
Essa
Mathematics and Theoretical Physics, NRC Egyptian Atomic Energy Authority, Cairo, Egypt
author
Ahmed
Shalaby
Physics department - faculty of science- Beni-suef University.
author
Ahmed
Mosallem
Mathematics and Theoretical Physics, NRC, AEA, Cairo, Egypt
author
Ayman
Khalifa
Physics Department, Faculty of Science, Beni- Suef University, Egypt
author
text
article
2020
eng
The vertical fraction variation of eddy diffusivity was taking into consideration in the dispersion of pollutants from a point source. A power-law profile was used to describe the variation of wind speed and vertical eddy diffusivity with height z above ground surface. The dry deposition of the diffusing particles at the ground surface is taken into account through the boundary conditions. The concentration of pollutants was derived assuming that the vertical diffusion is limited by an elevated inversion layer located at the top of the boundary layer “h”. Also the decay distance of a pollutant along the wind direction was estimated. The resulting analytical solutions have been applied on the emission from the Research Reactor at Inshas in unstable condition and Hanford diffusion experiment in stable condition. Comparisons between proposed and observed concentrations show a good agreement between the proposed and observed concentrations when "α=0.81 " than others fractions and integer value. The results are discussed and presented in illustrative figures.
Arab Journal of Nuclear Sciences and Applications
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
1110-0451
53
v.
2
no.
2020
87
97
https://ajnsa.journals.ekb.eg/article_79807_01a13b6cbfdaf84ac2736a7666e7e09c.pdf
dx.doi.org/10.21608/ajnsa.2020.15115.1241
Ionizing Radiation effect on Teucrium polium: Phytochemical Contents antioxidant and antibacterial Activity
sawsan
Elsonbaty
microbiology department,
National center for radiation research and technology
author
Noaman
Eltahawy
Radiobiology dep., national center for radiation research and technology, Atomic energy authority, Cairo, Egypt.
author
seif
al-dmour
MIcrobiology, science, ain shams university
author
sadia
Easa
microbiology, Science college, Ain Shams
author
haithym
Qaralleh
life science, Science college, Mota university , Jordan
author
text
article
2020
eng
Medicinal plants provides natural product may be used as precursors for new drug for their chemical diversity. In the present study, the potential of gamma radiation as sterilizing agent for preservation and its effect on phytochemical contents, antioxidant and antibacterial activity of Teucrium polium (T. polium) was analyzed for antimicrobial and antitumor activity. The results revealed that exposing plant powder to doses of gamma irradiation (5,10,15,20 KGy) significantly increased the ethyl acetate extraction yield (dry weight) as compared to the non-irradiated plant (control). Teucrium polium phytochemical contents of total phenolic content (TPC), total flavonoids content (TFC) and tannins content were significantly increased with gamma irradiation. In the same line, plant extract antioxidant activity was significantly increased in response manner to radiation dose. Teucrium polium ethyl acetate extracts shown antibacterial activity against Staphylococcus aureus and Pseudomonas aeroginosa. Gamma radiation doses caused significant increase in the antibacterial activity against P. aeroginosa and S. aureus at dose of 20 KGy. Total count of microbial load of T. polium was significantly reduced at 5.0 kGy by 99.95% with total decontamination of fungi count.
Arab Journal of Nuclear Sciences and Applications
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
1110-0451
53
v.
2
no.
2020
98
110
https://ajnsa.journals.ekb.eg/article_79818_3525359bf8503fd24efb68e749ce6d08.pdf
dx.doi.org/10.21608/ajnsa.2020.15218.1242
Production of Polyhydroxybutyrate (PHB) from Streptomyces Incanus and the Effect of Gamma Irradiation on its Production
Samar
Rezk
Benha university, faculty of science, botany and microbiology department. egypt
author
Doaa
Emam
National Center of Radiation and Technology Atomic Energy Authority,Cairo, Egypt
author
Hesham
Swailam
microbiology department, National center of radiation research and technology,Cairo, Egypt
author
Mahmoud
Swelim
Microbiology, Botany Dept.
Faculty of Science, Benha University
author
text
article
2020
eng
Streptomyces incanus BK 128 isolated from the Rhizosphere of eggplant was employed for polyhydroxybutyrate (PHB) production from different agriculture waste wheat bran, rice bran, rice straw and from molasses as the main carbon sources. Some supplements such as (0.4 g) ammonium sulphate to optimize the PHB production medium. The maximum PHB production was achieved with wheat bran (1.9g/l). Different parameters including; initial pH of the medium, ammonium chloride concentration and inoculum size; were carried out under shaking flask conditions (150 rpm) at 30ºC for 5 days of incubation to enhance the PHB production. The maximum PHB production (2.82gl-1) was achieved at pH 6.5, (2%) NH4CL and 5 ml inoculum size, respectively. The effect of gamma irradiation on the activity of Streptomyces incanus BK 128 towards PHB production showed that, at dose level 1.5 kGy the maximum PHB production obtained was 3.39 gl-1. Keywords: Biopolymer /PHB/ Streptomyces incanus / Wheat bran/ rice bran.
Arab Journal of Nuclear Sciences and Applications
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
1110-0451
53
v.
2
no.
2020
111
117
https://ajnsa.journals.ekb.eg/article_79845_ba53d2bb8c35653c54fe94784f416d1f.pdf
dx.doi.org/10.21608/ajnsa.2020.16698.1266
Histological Variants Induced by Gamma Irradiation in the Alimentary Tract of Callosbruchus maculatus (Coleoptera: Bruchidae)
shaimaa
Moamen
Entomology Department ,Faculty of Science, Ain Shams University
author
nermeen
El Bakary
Radiation Biology Department, National Centre for Radiation Research and Technology, Atomic Energy Authority, Cairo, Egypt.
author
text
article
2020
eng
This study had been conducted to evaluate the histological alternations induced by gamma irradiation in the alimentary tract of the 4th instar larvae of cowpea beetle Callosbruchus maculates (cowpea weevil). Using gamma rays at (0.25kGy, 0.50 kGy, 0.75 kGy, 1.0 and 1.5 kGy), and mortality was recorded at 48 and 96 hours after irradiation. The highest mortality 100% had been recorded at 1.5 kGy gamma irradiation, there wasn't any significance (P≥0.05) between irradiation at 1kGy and 1.5kGy but the significance was (P≤0.05) compared with other treatments. The lethal dose (LD50) of gamma irradiations at 48 and 96 hours were 0.4663 kGy and 0.4275kGy respectively; results revealed that the mortality augmented by increasing the radiation doses; indicated that the effectiveness of the application was dose-dependent. Histological variations triggered by irradiation showed obvious deformations, cytoplasmic vacuolization and apical degeneration of cells. Also, The tissues exhibited marked signs of lysis and necrosis of cells. Hence, gamma irradiation could be incorporated into the control strategy of C. maculatus as a physical control means for the reduction of loss caused by stored product insects.
Arab Journal of Nuclear Sciences and Applications
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
1110-0451
53
v.
2
no.
2020
118
124
https://ajnsa.journals.ekb.eg/article_79864_771d21e87737a5ecfbea1535b0381974.pdf
dx.doi.org/10.21608/ajnsa.2020.16705.1267
Applying radiolabeled novel recombinant insulin via 99mTc for ensuring native like action by in vivo biodistribution in mice.
Gamal
Abdelaziz
Labeled Compounds Department, Hot Laboratories Center, Egyptian Atomic Energy Authority, P.O. Box 13759, Cairo, Egypt.
author
text
article
2020
eng
In order to study functionality and pharmacodynamics of any important biological molecule such hormones and enzymes, it takes alot of time and complexed stratigies to do that. Here we study the incidence of new recombinant human insulin prevalence in body tissues in real time with aid of radiotracing technique. A new designed model of recombinant-human insulin and produced in E.coli suggested to be functional without post translational modification, has been radiolabeled with Technetium-99m, then tracing its biodistribution with 99mTc in mice. The new construct of human recombinant Insulin protein subjected to the formation of 99mTc-complex using sodium dithionite(Na2S2O4) as a reducing agent, whole reaction conditions subject to optimization of the pH, tempature, substrate amount and a reducing agent amount. Then 99mTc-Insulin complex has been intravenously administrated for biodistribution study invivo in Albino Swiss mice. The optimized conditions for preparing the 99mTc–insulin complex with the highest radiochemical yield(93.3%) disclosed that using 100 μg of insulin in the presence of 20μg of a reducing agent sodium dithionite(Na2S2O4) at pH 8 and within 30 minutes reaction time. The radioactive complex of 99mTc-Insulin gives a much better result after IV injection, where no accumulation in distinect organ. And due to aqueous nature of Insulin, it show clearance from both renal and hepatic route, Also prevalance of Insulin in body according every organs mass or size, have a great impact of functionality of recombinant-insulin molecule. Consequently, this method seems to be much rapid and effective for evaluation of biological molecule invivo via radioactive tracing technique.
Arab Journal of Nuclear Sciences and Applications
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
1110-0451
53
v.
2
no.
2020
125
130
https://ajnsa.journals.ekb.eg/article_79942_d5bc3fa5d7600f7f8acc096998fd2b4b.pdf
dx.doi.org/10.21608/ajnsa.2020.16566.1263
radiation synthesis of novel hydrogel based on wheat flour for dyes removal
Ehab
Khozemy
Polymer Chemistry Department, National Center of Radiation Research and Technology, Egyptian Atomic Energy Authority, Cairo, Egypt.
author
Eman
El Nesr
Polymer Chemistry Department, National Center for Radiation Research and Technology, Atomic Energy Authority, Nasr City, Cairo, Egypt.
author
Ghada
Mahmoud
National Center for Radiation Research and Technology (NCRRT), Cairo, Egypt
author
text
article
2020
eng
The use of biodegradable natural polymers in the industry has become urgent to eliminate pollution from the industrial wastes. A novel hydrogel based on wheat flour (F) and acrylic acid (AAc) was performed by gamma irradiation. The parameters controlled the preparation conditions were studied such as irradiation dose and hydrogel composition. Characterization of the produced hydrogel (F/AAc) was done by infrared spectroscopy to confirm the structure and the change in the morphology was investigated by scanning electron microscope. The thermal stability also investigated using thermogravimetric analysis (TGA). The swelling properties was investigated related to time and irradiation dose. The developed hydrogel was used for the removal of Congo Red dye (CR) from aqueous solution. Effects of different operating parameters such as effect of pH, contact time, concentration of dye and temperature on the adsorption capacity of the dye have been studied. It was found that marvelous adsorption capacities were obtained at pH 3. The pseudo-second-order model and the Freundlich model describe well the adsorption kinetic and isotherm, respectively.
Arab Journal of Nuclear Sciences and Applications
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
1110-0451
53
v.
2
no.
2020
131
143
https://ajnsa.journals.ekb.eg/article_80105_4d1349b28988947fe6d82c9ae26fe1ae.pdf
dx.doi.org/10.21608/ajnsa.2020.18778.1289
Search for GKK decays to pair of muons at 14 TeV
Ahmed
Abdelalim
Physics Department, Helwan University
author
Rasha
Elkholy
Physics Department, Helwan University, Cairo, Egypt
author
Amin
Hassan
Physics Department, Helwan University, Cairo, Egypt
author
text
article
2020
eng
We study the Randall-Sundrum (RS) model that predict the existence of narrow resonances that appear in the di-lipton invariant mass distribution in proton-proton collisions. This gives final state with di-muon having large invariant mass from the decay of the RS1 graviton. A Large Hadron Collider (LHC) feasibility study for five-sigma discovery at 14 TeV was performed. The Kaluza-Klein graviton (GKK) production cross sections as a function of the graviton mass are presented and the limits on cross sections times branching ratio into muons to observe a 5 σ signal are presented. Our estimates based on integrated luminosity of 100 fb-1 and 1000 fb-1. The conclusion of our study is that the LHC can test the RS1 graviton existence if it is already existing with masses up to 2.6 TeV/c2 (3 TeV/c2) at luminosity of 100 fb-1 (1000 fb-1), when the parameter c (model parameter) is equal to 0.01. With the optimistic scenario, at c equal to 0.1, the GKK could be discovered if it is existing with mass up to 5 TeV/c2 with 100 fb-1 and mass up to 6.5 TeV/c2 with 1000 fb-1.
Arab Journal of Nuclear Sciences and Applications
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
1110-0451
53
v.
2
no.
2020
144
147
https://ajnsa.journals.ekb.eg/article_80392_f19a928aa6fa0dc3004ad6aea0279050.pdf
dx.doi.org/10.21608/ajnsa.2020.18444.1284
Comparative Study of Structure, FMR and Magnetic Properties of Nanocomposite and Mixture Ferrite.
Reda
El Shater
Department of Physics- Faculty of Science- Tanta university
author
text
article
2020
eng
This investigation presents design of 20% M-type BaFe12O19 hexaferrite as a core coated by 80% MgFe2O4 spinel ferrite as a shell (〖Mg〗_80-H_20) in addition to, a mixture of 80% MgFe2O4 spinel ferrite and 20% M-type BaFe12O19 hexa-ferrite powders. The spinel and nanocompsite ferrite materials were synthesized by the wet mechano-chemical co-precipitation route and all prepared samples; spinel, nanocomposite and mixture are annealed at 1200 oC for 6 hours. The results of X-ray diffraction patterns, High Resolution Transmission electron microscope (HRTEM) images and Fourier-transform infrared spectroscopy (FT-IR) revealed the formation of two different composite materials. Comparing the FMR behavior of the nanocomposite and the mixed materials, the resonance field H_r of nanocomposite is lower than that of the mixture. This may be attributed to the effect of spring exchange coupling in the nanocomposite sample. The hysteresis loop of the 〖Mg〗_80-H_20 nanocomposite structure is similar to that of cubic spinel ferrite and exhibits the same Ms (18 emu/g) despite of its different values of Mr and Hc. Enhancing the remnant magnetization for the 〖Mg〗_80-H_20 nanocomposite and mixed materials is mainly attributed to the overcoming of magnetic exchange interaction and high magneto-crystalline anisotropy of hard phase in competition with dipolar interaction of soft phase. Comparing the FMR behavior of the nanocomposite and the mixed materials, the resonance field H_r of nanocomposite is lower than that of the mixture. This may be attributed to the effect of spring exchange coupling in the nanocomposite sample.
Arab Journal of Nuclear Sciences and Applications
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
1110-0451
53
v.
2
no.
2020
148
158
https://ajnsa.journals.ekb.eg/article_80411_83934298bb3b8d3fcad30db7db111688.pdf
dx.doi.org/10.21608/ajnsa.2019.15245.1243
Methylene Tetrahydrofolate Reductase Gene Polymorphism C677T & Risk of Type two Diabetes Mellitus in Beni-Suef Governorate
Dina
Elessawi
Lecturer in Health Radiation Research department , National center of Radiation Research and Technology , Atomic Energy Authority
author
Heba
El Demellawy
Internal Medicine Faculty Of Medicine Beni-Suef University
author
Hanan
Farhan
Lecturer of Clinical Pathology Faculty of Medicine Beni-Suef University
author
Mohamed
Tawfik
Health Radiation Research Department,
Biotechnology Branch, National Center for Radiation Research and Technology, Egyptian Atomic Energy Authority.
author
text
article
2020
eng
Background: Methylene Tetrahydrofolate Reductase (MTHFR) is known to be a regulatory enzyme of homocysteine metabolism. In many ethnic groups point mutations in MTHFR gene are implicated in the pathogenesis of diabetic nephropathy (DN) and other complications of type II diabetes mellitus (T2DM). Aim of the work: The aim of this study was to assess if MTHFR C677T gene polymorphism was one of the risk factors for the development of diabetic nephropathy as well as other complications in type 2 diabetes mellitus patients. Subjects and methods: The MTHFR C6777T polymorphisms were detected in 50 persons by PCR-RFLP. Subjects were divided into 2 groups; 30 patients with type II DM and 20 persons who were non-diabetic healthy controls. Results: The presence of MTHFR 677T allele did not increase the risk of complications in T2DM patients. The presence of mutant genotypes CT and TT did not increase the risk of nephropathy or other complications in the subjects having a C677T mutation. Conclusion: Methylene Tetrahydrofolate Reductase (MTHFR) C677T gene mutation was neither associated with an increased risk of diabetic nephropathy nor other complications of type II diabetes mellitus.
Arab Journal of Nuclear Sciences and Applications
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
1110-0451
53
v.
2
no.
2020
159
166
https://ajnsa.journals.ekb.eg/article_80778_73f06e122cf04ccb7c2a9492a5e7f9ee.pdf
dx.doi.org/10.21608/ajnsa.2020.17458.1277
Determination of Temperature Feedback Coefficients for OPR-1000 Fuel Assembly Using Adjusted Cross Section Libraries
Mohga
Hassan
32 kadri street Sayedah Zainab
author
text
article
2020
eng
An important source of reactivity variation in an operating reactor is the change in the temperature of the system. This change affects the criticality of the reactor and is expressed by the temperature reactivity coefficients. The most important feedback coefficients are those caused specifically by fuel and by moderator temperature changes. In this paper, temperature reactivity feedback coefficients are calculated for two assemblies solid 16×16 and annular 12×12, designed for OPR-1000 reactor. Feedback coefficients calculated are the fuel temperature coefficient, moderator temperature coefficient, prompt reactivity coefficient and power coefficient. A thermal resistance model was adapted to solid and annular fuel and was used to calculate the power coefficient. MCNP6 code was used to determine the multiplication factor, and hence the feedback coefficients. Temperature adjusted libraries were produced using MAKXSF utility program, associated with MCNP6 code. The difference between the use of regular library and temperature adjusted one is clarified. It was assumed that both reactors, with either fuel assembly type, operate at 100% power. The results showed that both designs gave close values with better results of annular fuel for the prompt reactivity and power coefficients.
Arab Journal of Nuclear Sciences and Applications
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
1110-0451
53
v.
2
no.
2020
167
176
https://ajnsa.journals.ekb.eg/article_80779_25e2406058583e2544a55889ffed3dbb.pdf
dx.doi.org/10.21608/ajnsa.2020.17701.1280
Evaluation of gamma rays shielding competence for bentonite clay /PVA polymer matrix using MCNPX code
fawzy
sallam
Nuclear materials authority
author
Ibrahim
Hager
Department of Physics, Faculty of Science, Menoufia University, Shibin El Kom, Egypt
author
Yasser
Rammah
Department of Physics, Faculty of Science, Menoufia University, Shibin El Kom, Egypt
author
Hosam
Othman
Department of Physics, Faculty of Science, Menoufia University, Shibin El Kom, Egypt
author
Eman
Ibrahim
Department of Geochemical Exploration, Nuclear Materials Authority, Cairo, Egypt
author
sayed
Hassan
Department of Medical and Radiological Research, Nuclear Materials Authority, Cairo, Egypt
author
Zakaria
Ahmed
Egyptian Nuclear and Radiological Regulatory Authority, Egypt
author
text
article
2020
eng
Radiation shielding capability in terms of mass and linear attenuation coefficients, half value layer, tenth value layer, and mean free path haven been evaluated for natural bentonite coated by polyvinyl alcohol polymer (PVA) using Monte Carlo simulation (MCNPX) and XCOM program. All data were determined at gamma photons energies 662, 1173 and 1332 keV emitted from point sources of 137Cs and 60Co, respectively, and compared with calculated experimental data. XCOM results of mass attenuation coefficients showed better agreement with experimental data in comparison with MCNPX code. The relative deviations between experimental and theoretical mass attenuation coefficients are 4.3, 2.5 and 1.25 % at 662, 1173 and 1332 (keV) while deviation between simulated and experimental mass attenuation coefficients are -3.1, -10.96 and -10.35 % at the same energies, respectively. The relative deviation between simulated shielding factors HVL, TVL and MFPwith experimental data exhibit the same behavior as mass attenuation coefficient and having average relative deviations percentage equal to 2.5, 13.4 and 13.8 % at the studied energies, respectively.
Arab Journal of Nuclear Sciences and Applications
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
1110-0451
53
v.
2
no.
2020
177
188
https://ajnsa.journals.ekb.eg/article_81559_705f3f238d16119ee93e1e394a25e0be.pdf
dx.doi.org/10.21608/ajnsa.2020.18914.1292
Comparison of intensity modulated and 3- dimensional conformal radiotherapy for prostate cancer using 6-MV and 15-MV photon energies
Jamal
AL-Shareef
Medical Biophysics, Sana&#039;a University, Sana&#039;a, Yemen
author
Ehab
Attalla
Department of Radiotherapy and Nuclear Medicine, National Cancer Institute, Cairo University, ‎Cairo, Egypt
author
magdy
Khalil
Physics Department, Faculty of Science, Helwan University, Cairo, Egypt
author
Ahmed M
Abdelaal ‎
‎ Radiotherapy Department, Nasser Institute, Cairo, Egyp
author
text
article
2020
eng
Prostate cancer is one of the commonest cancers in men. The purpose of this work was to compare between intensity-modulated radiotherapy (IMRT) versus three-dimensional conformal radiotherapy (3D-CRT) planning in patients with prostate cancer using 6-MV and 15-MV photon energies. Twenty patients with localized prostate cancer were planned on Xio treatment planning system. Four treatment plans were generated for each patient. IMRT whether 6 or 15 MV beam was slightly better in terms of target coverage but not significant (p>0.05) in comparison to 3D-CRT in both beam energies. IMRT was better than 3D-CRT in terms of organs at risk (OARs) sparing and conformity index (CI) in both 6 and 15-MV whereas 3D-CRT in both 6 and 15-MV yielded better homogeneity index (HI) compared to IMRT 6 and 15-MV. The number of monitor units (MU) increased in IMRT compared to 3D-CRT. Also, MU increased in low energy compared to high energy whether in 3D-CRT or IMRT (p<0.05). When IMRT 6-MV and IMRT 15-MV were compared, no significant difference was found in terms of target coverage and OARs except the rectum was better in IMRT 6-MV compared to IMRT 15-MV. IMRT 6-MV technique should be prioritized when user has options for treatment and then 3D-CRT as a second line when the former is not available. The choice of the energies (6 and 15MV) used with 3D-CRT depend largely on patient's body geometry while the use of high energy IMRT 15-MV is not recommended.
Arab Journal of Nuclear Sciences and Applications
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
1110-0451
53
v.
2
no.
2020
189
200
https://ajnsa.journals.ekb.eg/article_81561_3b9baaf5c30cd188678f927e223ecae3.pdf
dx.doi.org/10.21608/ajnsa.2020.19402.1296
Metal ions release in saliva from Fixed Orthodontic appliances: A Systematic Review
Radwa
Sallam
National center of Radiation research and Technology
author
text
article
2020
eng
Standard Orthodontic intervention, involves the use of brackets, bands and arch wires. Brackets used in orthodontic treatment provide the means to transfer force to the teeth using the arch wire. Biodegradation of different types orthodontic brackets might lead to metal ion release . Nickel (Ni) and chromium (Cr) containing alloys are present in the manufacture of most of the orthodontic appliances.Increae of nickel and/or chromium ion release could result in heath hazardous effects Analysis of released metal ions was performed through mass spectroscopy, atomic absorption spectroscopy. The aim of this study is to systematically assess the release of metal ions with fixed orthodontic appliances using ceramic brackets. Electronic searches will be performed in two databases (PubMed, Cochrane). The PubMed, identified 29 studies, 4 of which met the inclusion criteria. In conclusion, Although these studies are limited and very few, this systematic review can state that the release of metal ions in patients with fixed orthodontic appliances is in measurable amounts that are considered to be safe. In addition there are no difference in the release of salivary ions regardless of the bracket type used.
Arab Journal of Nuclear Sciences and Applications
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
1110-0451
53
v.
2
no.
2020
201
207
https://ajnsa.journals.ekb.eg/article_81562_0129c6ba63d7a337ebb92110a3a27e31.pdf
dx.doi.org/10.21608/ajnsa.2020.24817.1329