Preliminary Results of a Novel Designed 7.7 kJ Plasma Focus Device with Hemisphere Electrodes
Mohamed
Abdelkader
plasma and nuclear fusion, NRC, Atomic energy Authority, cairo, egypt
author
Mohamed
Abdel-Halim
Physics dep.- Science College- Benha University - Al-Qalubeia- Egypt
author
text
article
2021
eng
The Hemisphere Plasma Focus Device, a new construction of plasma focus devices is constructed and operated with total energy of 7.7 kJ. The discharge takes place between two concentric hemispherical electrodes. The plasma sheath is accelerated and confined by electromagnetic force. Rogowiski coil and potential divider are used to characterize the discharge current, the discharge voltage and obtain the pinch effect in shape of sharp crevice. The deposited energy is about 31.5% of the input energy for 6kV charging voltage. The total system inductance is about 285 nH with low resistance of about 23 mΩ. The plasma inductance has maximum value at the pinch time. The pinch time decreases by increasing input energy and also by decreasing the helium gas pressure. The average sheath velocity varies in range between 1.5 and 2.7 cm/µs which indicates that the charge state is about 2 and plasma temperature should mostly be over 11.2eV.
Arab Journal of Nuclear Sciences and Applications
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
1110-0451
54
v.
3
no.
2021
1
8
https://ajnsa.journals.ekb.eg/article_163156_9ab76f2184b32fff8be5f5277a933a9d.pdf
dx.doi.org/10.21608/ajnsa.2021.32550.1367
Computational Study on Characteristic Radiation Originated from Channeled Relativistic Electrons in Single-Wall Carbon Nanotubes
Marwa
Ali
Physics department , Faculty of science, suez canal University
author
text
article
2021
eng
I calculated the number of bound states n for channeled electrons through single wall carbon nanotubes (n,m) at different values of electrons energy by using (Wetzel, Kramer's, Brillouin approximation)(WKB) method. The calculations executed according to the continuum model approximation given by Lindhard for the case of an axial channeling in single crystals. The estimated results of the maximum number of bound states of the channeled electrons in a zigzag (n, 0), armchair (n,n) and chiral(n,m) nanotubes have been performed using the Moliere potential. In this work we determined the emitted photon energy due to n, (n-1) transitions between higher -quantum states as a function of the electron energy up to 500 MeV. Also the energy levels of electrons channeled in different types of single wall carbon nanotubes by using Moliere potential were defined. It has been showed that the emitted photon energy in the forward direction is the energy difference between the successive initial and final states of the channeled electron. The energy of the emitted channeling radiation has been calculated for incident electron at 50 MeV. We calculated the emitted channeling radiation for incident electrons at 10, 50 and500 MeV with frequency in X-ray range.
Arab Journal of Nuclear Sciences and Applications
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
1110-0451
54
v.
3
no.
2021
9
14
https://ajnsa.journals.ekb.eg/article_163157_cf75a50541946700a01b371d34a4c568.pdf
dx.doi.org/10.21608/ajnsa.2021.33195.1369
The Influence of Hemispheric Solar Activity Features on the Interplanetary Plasma Parameters throughout 1967 ̶ 2017
Amr
El-Taher
physics and chemistry, faculty of education, Alexandria university
author
Mohammad
El-Borie
physics department, faculty of science, Alexandria university
author
Ahmed
Bishara
physics department, faculty of science, Alexandria university
author
Amr
Thabit
2Basic and Applied Science Dept., Faculty of Engineering, Arab Academy for Science and Technology, Alexandria,
author
Hudamnallah
zoheir
1Physics Dept., Faculty of Science, Alexandria University
author
text
article
2021
eng
In this article, we have examined the possible influence of hemispheric solar activity features on the interplanetary plasma parameters. For this purpose, the daily data of sunspot areas (SSAs) and sunspot numbers (SSNs) as well as the interplanetary plasma parameters (interplanetary magnetic field (IMF) magnitude B, plasma density n, plasma velocity V, plasma temperature T, and plasma dynamic pressure P) during the period 1967 ̶ 2017 have been used. The daily data of each interplanetary plasma parameter has been classified into two groups, northern (N) and southern (S) sorted groups based on the dominance of hemispheric SSAs or SSNs. The yearly averages of the sorted N and S groups have been calculated for each plasma parameter. The asymmetry index (N-S) for each parameter between the northern and the southern sorted group has been calculated. The asymmetry of B over the solar activity cycles is not detectable, indicating that the solar cycles are magnetically symmetric, in agreement with the findings of (El-Borie et al., 2018a). During the solar cycles 20, 21, and 24, the solar plasma for the southern sorted group was faster (hotter) by 20.3 km/s (15.7×103 oK), 13 km/s (8×103 oK), and 29 km/s (14.5×103 oK) than that for the northern sorted group, respectively. In contrast, during the solar cycle 23, the solar plasma for the southern sorted group was slower (colder) by 7.4 km/s (7.2×103 oK) than that for the northern sorted one.
Arab Journal of Nuclear Sciences and Applications
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
1110-0451
54
v.
3
no.
2021
15
25
https://ajnsa.journals.ekb.eg/article_163158_804ad3cf5d402221d8c7318d7319f074.pdf
dx.doi.org/10.21608/ajnsa.2021.38711.1393
Isotopic Inventory and Activity Calculations of Fukushima Daiichi Unit-1 Accident
Rowayda
Mahmoud
Egyptian Atomic Energy Authority, 3 Ahmed El- Zomor, Cairo, Egypt
author
Mohamed
Abdu
Zewail City of Science & Technology
author
Mohamed
Shaat
author
text
article
2021
eng
Nuclear characterization of the spent nuclear fuel in a reactor core is essential, especially in case of severe accidents. The radionuclide inventory and its activity can assist in the management of spent fuel handling, transport, or reprocessing. In this paper, the core of the Fukushima Daiichi Unit-1(FD-U1) accident was modeled using the Monte Carlo code (MCNPX 2.7) linked to the depletion calculation code CINDER'90 and ENDF/B-VII.0 cross-section data library. The isotopic inventory and the activity of the radionuclides for the burned fuel were calculated. The input to the code depends on the previous evolution of the reactor core configurations, dimensions and material of the fuel assemblies, initial uranium enrichment, fuel burn-up, and reactor core operational history. The calculations were validated with experimental measurements which were carried out by the Japan Nuclear Energy Safety Organization (JNES) and verified with published results using ORIGEN2-code by Japan Atomic Energy Agency (JAEA). The masses, activities, specific activities, half-lives, and decay schemes for the actinides and fission products were calculated at the time of the accident and after 50 years of cooling time. The calculations showed that the total activity of the burned fuel in the core at the time of the accident was 9.86E+19Bq and after 50 years was 1.89E+17Bq and the higher inventory concentration in the fuel was dominated by the trans-uranic elements. Also, the specific activity in the core at the time of the accident and after 50 years of cooling time was found to be 1.84E+15Bq/g and 5.86E+12Bq/g, respectively.
Arab Journal of Nuclear Sciences and Applications
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
1110-0451
54
v.
3
no.
2021
26
33
https://ajnsa.journals.ekb.eg/article_166398_a5aceb8095f6a071f4263026416051d6.pdf
dx.doi.org/10.21608/ajnsa.2021.40762.1397
DNA Damage Detection after Chronic Exposure and Radio-adaptive Response of Naturally Occurring Radioactive Materials (NORM)
Seham
El-Marakby
Radiation Physics department, National Center for Radiation Research and Technology, Egyptian Atomic Energy Authority (EAEA)
author
Mahmoud
Abdelgawad
Physics Department, Faculty of Science, Al-Azhar University, Cairo, Egypt
author
misara
awd
bio-physics, faculty of science, al-Azhar university, Cairo, Egypt
author
Khairy
Eraba
Physics Department, Faculty of Science, Al-Azhar University, Cairo, Egypt
author
Omar
Desouky
Biophysics lab, Radiation Physics Department, National Center of Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt
author
text
article
2021
eng
The objective of this study was to understand the effect of chronic low-dose radiation that induces in vivo radio-adaptive response. The animals were exposed chronically to natural radioactive materials (NORM) for one and two months which correspond to 10 &20 mSv which are comparable to the reality of areas with high background natural radiation (HBNR). Radioactivity assessment of samples was done using a high purity germanium -ray spectrometer. We conduct the study to understand the radio-adaptive response by exposure the experimental animals to challenge dose 2 Gy after continuous exposure to 10 & 20 mSv. Comet assay was performed in addition to some of antioxidant enzymes concentrations (superoxide dismutase (SOD), catalyze enzyme (CAT), reduced and oxidized glutathione (GSH). Chronic exposure to 10 and 20 mSv showed DNA damage as a high elevation in comet assay, parameters. Also the results of the present work showed a low production of antioxidant enzymes CAT, SOD & GSH in both chronic exposure (10 & 20 mSv and challange dose 2 Gy). The exposure to 20 mSv before 2Gy gamma rays resulted in an enhancement of antioxidant enzymes accompanied with decreasing in free radical which is represents as an adaptive response. . It can be said that for low radiation doses, which are less than 100 mSv, their effects differ from high doses, so that it can be said that the body has an adaptive response and the application of the linear non-threshold model must be reviewed for these doses.
Arab Journal of Nuclear Sciences and Applications
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
1110-0451
54
v.
3
no.
2021
34
45
https://ajnsa.journals.ekb.eg/article_167404_dd91170699c11ebe2b33e2ca1a23433b.pdf
dx.doi.org/10.21608/ajnsa.2021.63401.1450
The possible hypo-lipidemic effect of aqueous extract of gamma-irradiated chard leaves in rats fed high fat diet
Ashraf
Shaaban
Food irradiation department, Artificial irradiation division, NCRRT, Cairo, Egypt
author
Amro
EL-Shahat
Food irradiation Department, Artificial Irradiation Division, NCRRT, Cairo, Eygpt
author
Aly
Abdel-Azeem
Food Irradiation Department, Artificial Irradiation, NCRRT, Cairo, Egypt
author
text
article
2021
eng
Studying the influence of gamma (γ) -rays processing on the anti-oxidant activity of chard (Beta vulgaris) leaves and implementing of the conceivable hypo-lipidemic and anti-oxidant potential of aqueous extract of γ-irradiated chard leaves (GCLAE) against high fat diet (HFD) were the two objectives of this study. Processing of dried chard leaves by γ-rays (10 kGy) causeda significant elevation in the total phenolic content, total flavonoids and antioxidant activity compared tothe raw samples.Data showed that feeding rats HFD for 10 weeks induced a state of dyslipideamia, increase the levels of inflammatory factors, liver and cardiac markers and also induced the level of lipid peroxidation with significant depletion of the antioxidant status relative to the control group. Supplementation of GCLAE along with HFD resulted in remarkable protection against HFD-complications and that evidenced by reduction in total cholesterol (TC), triglycerides (TG),Low-density lipoprotein-cholesterol (LDL-C) and very Low-density lipoprotein-cholesterol(VLDL-C),remarkable increase in high-density lipoprotein cholesterol (HDL-C), tumor necrotic factor-alpha, interleukin-6, decrease the level of liver and cardiac enzymes and also GCLAE administration enhance the activity of hepatic and cardiac antioxidant parameters (glutathione content, superoxide dismutase and catalase) and reduce the level of malondialdehyde compared to rats fed HFD. Thus, it could be concluded that γ-irradiation technique might be useful for chard processing with the purpose of shelf-life prolongation as well as to increase its anti-oxidant capacity. Moreover, the results concluded that GCLAE may have an effective role in reducing the health complications for those fed high fat diet.
Arab Journal of Nuclear Sciences and Applications
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
1110-0451
54
v.
3
no.
2021
46
54
https://ajnsa.journals.ekb.eg/article_167407_0ce671e479074330899e67e0fbc8946e.pdf
dx.doi.org/10.21608/ajnsa.2021.48781.1414
Infrared Faces Image Recognition Using Local Binary Pattern
mohamed
Kaloup
NCRRT
author
Hassan
Saleh
Radiation Engineering Dept.,
author
text
article
2021
eng
Face recognition has a broad range of uses for business and law enforcement, such as access control, security monitoring, and video surveillance. This paper proposes an effective algorithm for Infrared face recognition using a Local Binary Pattern (LBP) for extraction of features and a Canonical Correlation Analysis (CCA) for fusion and classification of features. The facial characteristics are extracted using LBP. The extracted characteristics are then converted into different domains for transformation. For dimensionality reduction, the two-Dimensional Principal Component Analysis (2DPCA) approach is used in the proposed algorithm to generate more lightweight, robust and discriminatory features, which are then combined using the CCA classifier. The spatial relationship between adjacent pixels is also maintained by 2DPCA, increasing the overall accuracy of recognition. In addition, the paper introduces a comparative study between infrared facial recognition systems using the proposed technique and previous work. Based on the recognition rate and time usage, the output is evaluated. The analysis of the findings shows that the technique proposed is the most efficient and the least time compared to previous techniques. The experimental results are tested on a dataset acquired by Equinox Corporation. The proposed technique achieves a recognition rate of 99.26% at 0.45 seconds.
Arab Journal of Nuclear Sciences and Applications
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
1110-0451
54
v.
3
no.
2021
55
62
https://ajnsa.journals.ekb.eg/article_167408_23f16705ae787df10ccfd0c53f500780.pdf
dx.doi.org/10.21608/ajnsa.2021.63349.1449
Dimuons in LHC
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
2021
eng
In a hadron collider like the Large Hadron Collider (LHC), the dimuon channel provides an ideal tool for the discovery of many predicted particles from Beyond Standard Model (BSM) theories such as high mass resonant, or non-resonant states. The high mass resonances like Z’ and the high mass non-resonant like contact in- teractions or extra dimensions should appear in the high mass tail of dimuon dis- tributions. The Drell-Yan process is the main source of high mass opposite sign muon pairs in the Standard Model (SM) which act as the irreducible background of signals of the above mentioned BSM models in proton-proton collisions. Therefore, it is important to study with the highest possible accuracy the Drell-Yan process. In this paper, we study in detail the expectations of the Drell-Yan process in the dimuon channel at next-to-next-to-leading order in QCD and next-to-leading order in the electroweak corrections. In our study, we considered a typical generic detector acceptance such as CMS or ATLAS at the LHC at center of mass energy 14 TeV. At the end of this study we gave estimates of the expected backgrounds for new physics searches in the dimuon final states.
Arab Journal of Nuclear Sciences and Applications
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
1110-0451
54
v.
3
no.
2021
63
66
https://ajnsa.journals.ekb.eg/article_167409_9531f615316401dda6bdfda7ad77b2ac.pdf
dx.doi.org/10.21608/ajnsa.2021.42199.1399
Characteristics Analysis of Contrast Transfer Images Based on Optoelectronic Integrators
Mohamed
El Tokhy
Engineering Department, NRC, Atomic Energy Authority, P. No. 13759, Inshas, Egypt
author
Elsayed
Emarah
Department on Engineering, Nuclear Research Center, Egyptian Atomic Energy Authority
author
Refaat
Fikry
Engineering and Scientific Instruments, Nuclear Research Center, EAEA, Egypt
author
text
article
2021
eng
The present study is concerned with overcoming the resultant image degradation due to the integration of the optoelectronics instruments (OEIDs). Accordingly, the characteristics of the image, due to optoelectronic integration, are handled and improved. The image features include the transmission mechanism and the concentration of electrons. The device performance is improved through the optimal design of the basic parameters. Furthermore, the efficient design of structure parameters will minimize the reabsorption process. Optimization of the integrator structure is realized. MATLAB environment is used for devising this instrument. The optimal number of integrator base and wave number characterizing the scale of near-infrared (NIR) image nonuniformity are estimated to be 13 and 0.206 respectively. The output of this instrument is also conducted through closed-form expressions of the underlined instrument. The achieved results show a remarkable accuracy for handling the deformations raised during the integration process. In addition, the results show that the carrier concentration changes the behavior of the output of the NIR image.
Arab Journal of Nuclear Sciences and Applications
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
1110-0451
54
v.
3
no.
2021
67
73
https://ajnsa.journals.ekb.eg/article_167410_9f62aaad51dd5b6dc1073750253cc4c0.pdf
dx.doi.org/10.21608/ajnsa.2021.46488.1410
Risks of Protein Conditioner Application under the Impact of Heat and/or Gamma Irradiation in Albino Rats
Samir
Eskander
Radioisotope department Nuclear research center ,Egyptian Atomic Energy Authority
author
Eman
Abdel-Gawad,
Radioisotopes Department , Nuclear research Center Egyptian Atomic Energy Authority
author
Alia
Ezz El Arab
Radioisotopes Department, Nuclear Research Center Egyptian Atomic Energy Authority
author
text
article
2021
eng
The objective of the submitted work was to assess the effect of hot air and/ or gamma irradiation following the application of a protein hair conditioner on the skin hygiene. Ninety six albino rats were employed. They were divided into eight groups; each included six males and six females. Rats in group 1 served as control . Rats of groups 2, 3 and 4were rubbed with conditioner for one, two and three times, respectively, every was separated by seven days. Following every treatment, the rats were exposed to hot air (95 ᵒC) for one minute. Rats in groups5,6 and 7 were treated in the same manner . After one week, they exposed to a single dose gamma irradiation (10 Gy). Rats in group 8 were treated once with conditioner and then directly exposed to the same dose. Post one week of irradiation, all rats were anesthetized and blood samples were collected for biochemical analyses, while shaven skin cuts from the centre protein applying area for histological examinations. Morphological observations revealed alopecia and skin ulcer. Whereas, the biochemical results indicated that serum collagen I contents decreased while heat shock protein concentrations increased as treatment repetitions. The level of vascular endothelial growth factor exhibited inconsistence trend. Histopathological observations confirmed the morphological findings. In conclusion, there is no protein hair conditioner products that can be considered completely safe. It is worth to state that, it’s time to give serious consideration for stopping these treatments to avoid the cumulative application risks.
Arab Journal of Nuclear Sciences and Applications
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
1110-0451
54
v.
3
no.
2021
74
89
https://ajnsa.journals.ekb.eg/article_167413_91793d1a9fb220238c35fe4b692ed5dc.pdf
dx.doi.org/10.21608/ajnsa.2021.54276.1424
Relations Between Radionuclides Activities and Pb Concentration on Different Rock Types.
Eman
Abd El-Halim
Women Faculty- Ain Shams University
author
Asma
AL-abrdi
physics department, College of science Omar AL-mokhtar University, Libya
author
text
article
2021
eng
The level of natural radioactivity in eight sediment rock samples from western south Sinai were collected from three different locations Um Bogma, Wadi Um Hamd and wadi Sad El-Banat, also two granite samples were collected from Gabal Gattar, north eastern desert in Egypt was investigated. The gamma-ray spectrometry system with hyper pure germanium (HPGe) detector has been used to determined radioactivity concentrations. Samples were subjected to sulphuric acid leaching processes with the same parameters of solid liquid ratio S/L, acid concentration and leaching time. After leaching process, the pregnant solution was separated from the residual and the latter was dried. The two units, named the pregnant solutions and residuals were also measured radiometrically using the hyper-pure germanium detector to determine the activity concentrations (Bq/kg) of the different radionuclides of samples. The results showed that the relation between the sum of activities of 238U in both solutions and residuals with originals have two modes. The first mode is represented by the sum of 238U activities in leachate and residual is nearly equal the activity in the original sample. In the second mode, the sum is higher than the original. These variations depend mainly on the grain surfaces in the different rock types and its content high concentration of Pb. This phenomenon varied in magnitude within the different radionuclides in each sample. Also the leachability of U by the chemical analysis using several acidic leaching experiments for uranium have been performed by sulfuric acid.
Arab Journal of Nuclear Sciences and Applications
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
1110-0451
54
v.
3
no.
2021
90
97
https://ajnsa.journals.ekb.eg/article_167412_2c435b0fc04cc0b63a87f9dcafc44df9.pdf
dx.doi.org/10.21608/ajnsa.2021.50965.1419
Effect of gamma-ray on producing induced colour centres and on positron annihilation lifetime of bismuth-doped zinc sodium borate glasses
Ashraf
Ghanem
Department of Physics, Faculty of Science, Fayoum University
author
Kamal
Mohamed
Department of Physics, Faculty of Science, Kafrelsheihk University
author
text
article
2021
eng
Abstract A melt quenching method have been used for preparing a glass composition of the form (70-x)%B2O3-15%ZnO-15%Na2O-x%Bi2O3 (where x = 0, 5, 10, 15, 20, 25 mol %). The prepared glass was studied by FTIR and Positron annihilation lifetime measurements. FTIR analysis after 80 kGy -irradiation of bismuth-doped glass samples, show the dependence of the number of structural units BO3 and BO4 on the -irradiation dose. FTIR absorption spectra revealed that gamma irradiation produces a degree of a disorder or defects of the glass network which producing colour centres. The objective FTIR spectra were used to estimate the N4 ratio and its dependence on the composition. Positron annihilation lifetime measurements were carried out for all samples before and after 80 kGy -irradiation. Irradiated samples show a colour change, which is most likely due to the formation of colour centres. Such colour changes due to -irradiation allow estimating that the prepared glass samples can be used as a shielding material or as a radiation indicator sensor.
Arab Journal of Nuclear Sciences and Applications
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
1110-0451
54
v.
3
no.
2021
98
107
https://ajnsa.journals.ekb.eg/article_167414_43309b730354a32c32c7f4bdbd2e4712.pdf
dx.doi.org/10.21608/ajnsa.2021.55539.1426
Analysis of Fuel Burn-up Calculations of 3600 MWth Sodium cooled Fast Reactor Core
Amr
Ibrahim
Basic Sciences, High Institute for Engineering and Technology at Obour, Cairo, Egypt.
author
text
article
2021
eng
Fast spectrum reactors are essential for the future of nuclear energy. Therefore, there is a need for continuous research and development of the design and safety of current and future nuclear fast reactors. The aim of this work is to analyze the process of fuel burnup in a large scale (3600 MWth) Sodium cooled Fast Reactor (SFR) core. This design is called European Sodium Fast Reactor (ESFR). It is proposed in the 7th Framework Programme within the Euratom Framework. A new version (version 2.7) of Monte Carlo neutron transport code (MCNPX) was used to design a 3D model of the ESFR core to evaluate and analyze a number of burnup-relevant characteristics. These include the flux and power distributions across the ESFR core as well as the reactivity changes and fuel transmutation during burnup to take into account the changes in fuel composition during burnup. Obtained results can serve as up to date evaluation for the design and well allow for a detailed assessments of the fuel performance inside the ESFR core.
Arab Journal of Nuclear Sciences and Applications
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
1110-0451
54
v.
3
no.
2021
108
114
https://ajnsa.journals.ekb.eg/article_168967_2f69fee94d364ced48f8311a8f4ba1e3.pdf
dx.doi.org/10.21608/ajnsa.2021.58175.1434
Assessment of Radioactivity Contents and Radiological Effects of Marble, Granite, and Ceramic Used in Alexandria City, Egypt
Nesma
Ibrahim
Department of Environmental Studies, Institute of Graduate Studies and Research, Alexandria University
author
Ibrahim
Saleh
Department of Environmental Studies, Institute of Graduate Studies and Research, Alexandria University, Alexandria, Egypt
author
Zekry
Gatass
Department of Environmental Studies, Institute of Graduate Studies and Research, Alexandria University, Egypt.
author
text
article
2021
eng
The main aims of the present study are to analyze and internationally comparing the radioactivity contents of (226Ra, 232Th, and 40K) in marbles, granites, and product and raw materials of ceramics utilized in different construction purposes in Alexandria city, additionally, the associated radiological hazard indices have been assessed. Measurements have been performed by using high-resolution gamma rays spectrometer equipped with (HPGe) detector. The mean levels of the radioactivity of (226Ra, 232Th, and 40K) in marbles were 26.87, 4.30 and 19.13 Bqkg-1; respectively, and in granites were 42.90, 58.40, and 933.36 Bqkg-1; respectively, while in ceramic were 47.73, 66.09, and 385.59 BqKg-1; respectively. Results of ceramic raw materials showed the highest levels for 226Ra and 232Th as 16307.46, and 1738.69 Bqkg-1 both are recorded in zirconium, while the highest of 40K as 1760.62 Bqkg-1 in feldspar. Radiological hazards were assessed by radium equivalent activity, external and internal radiation hazard indices as well as the annual effective dose. The maximum values of indices were observed in Baltic Brown granite samples to be 425.92 Bqkg-1, 1.15, and 1, 48 for radium equivalent, external and internal hazard indices; respectively. The observed highest external effective doses in marble, granite, and ceramic were 396.53, 2109.81, and 1495.06 µSvy-1; respectively. From the obtained results is clear that granite may pose health risks as well, additional regulating the amount of zircon adding to ceramic industries is highly required.
Arab Journal of Nuclear Sciences and Applications
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
1110-0451
54
v.
3
no.
2021
115
125
https://ajnsa.journals.ekb.eg/article_172851_d1800fe67e656a75004f450c8ab2e8d6.pdf
dx.doi.org/10.21608/ajnsa.2021.60499.1439
Electromagnetic Radiation Influences on Rheological Parameters of Rats’ Blood
Mai
Elkaliouby
Physics & Chemistry Department, Faculty of Education, Alexandria University, Alexandria, Egypt
author
text
article
2021
eng
The present work aimed to study the alterations in blood viscoelasticity and hematological parameters as a result of the exposure to electric field (50 Hz-4 kV/m-8h/d), magnetic field (50 Hz -0.3 mT-8h/d) and high energy photon (6 MeV; 0.002Ao-1 rad). The blood tissue was chosen as biomarker for the direct and delay exposure evaluations whereas its viscosity coefficient as function of shear rate was monitored and its mechanical characteristics as function of osmotic pressure was measured. In addition, the hematological parameters were observed for all collected blood samples and correlated to the blood viscoelasticity. The obtained results showed remarkable effects on the studied blood parameters even at short exposure periods and /or after delayed exposure effects. From the present results it may be concluded that the exposure to electric and magnetic field at extremely low frequency range has hazardous effect not less than the ionizing radiation at very low dose. Our findings indicated that maximum deteriorative effects resulted due to exposure to magnetic field (30 days) whereas the blood viscosity coefficient, RBCs elastic limit, and hemoglobin were decreased relative to the control by -38%, -30% and -25% respectively. Moreover, the changes in blood viscoelasticity and hematological parameters as a result of the exposure even after 45 days’ post exposure support the hazardous effects of such fields. The need of new recommendations for exposure to such fields and frequent blood checkup should be done from time to another specially for residents who expose for long times.
Arab Journal of Nuclear Sciences and Applications
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
1110-0451
54
v.
3
no.
2021
126
134
https://ajnsa.journals.ekb.eg/article_179710_519cbc6866f1f0bf018d53e78cfd17a4.pdf
dx.doi.org/10.21608/ajnsa.2021.46758.1412