Egyptian Society of Nuclear Sciences and Applications (ESNSA)
Arab Journal of Nuclear Sciences and Applications
1110-0451
2090-4258
51
4
2018
10
01
Design of portable shield for neutron sources using MCNP Computer Code
1
8
EN
Randa
Mahmoud Mohamed
Mahmoud
Radiation Protection dep. Nuclear and Radiological regulatory authority
randam76@yahoo.com
10.21608/ajnsa.2018.2256.1021
In this work a proposed design of portable shield for neutron sources was performed theoretically using MCNP5 code. The shield is composed of three layers; lead layer for gamma attenuation, PMMA (Poly-methyl methacrylate) layer for fast neutron thermalization and a layer of B2O3 for thermal neutron absorption. The shield materials are combined in stainless steel container of 0.5 mm thick.<br /> The source design verification was carried out by experimental measurements at different source-center distance. The energy spectrum of 241Am-Be source is considered in order to study the neutron moderation due to successive elastic scattering with PMMA composition. The neutron and photon total dose rates was calculated at the surface and one meter from the shield. The results of MCNP5 model were compared with the international transport regulation to ensure the suitability of neutron shield proposed design. The results show that the proposed design of the portable shield satisfies the dose rate limits and can be used for control of external radiation level during neutron source transportation, ensure the safety transport conditions and protection of radiation workers in different applications.
Portable shield design,neutron sources,MCNP code
https://ajnsa.journals.ekb.eg/article_9176.html
https://ajnsa.journals.ekb.eg/article_9176_6468430be53136ba0749de65a3c1904f.pdf
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
Arab Journal of Nuclear Sciences and Applications
1110-0451
2090-4258
51
4
2018
10
01
Effect of Gold Nanoparticles on the Physical Properties of Poly (3,4-ethylenendioxythiophene): Poly(styrene sulphonate) and its Gas Sensor Application
9
18
EN
Rania
M.
Ahmed
Physics Department, Faculty of Science, Zagazig University
rania.7.8.2016@gmail.com
10.21608/ajnsa.2018.2326.1024
Abstract: Conducting polymers offer a unique combination of properties that make them promising candidate materials for electronic applications. Poly (3,4-ethylene dioxythiophene): poly(styrene sulphonate) (PEDOT-PSS) is one of conducting polymers that has excellent qualities to be incorporated into many organic devices as helping in the charge transfer. In this study, different sizes of gold nanosphers (Au NSs) have been embedded into the PEDOT-PSS to form nanocomposites to improve its physical properties. Au NSs which exhibit tunable absorption depending on their size have effectively improved the absorbance of PEDOT-PSS. The increase in the energy band gap and the decrease in Urbach energy were depending on the size of (Au NSs). Embedding Au NSs in PEDOT-PSS has investigated an enhancement of the electrical conductivity of the produced nanocomposites. Lowering the gas sensitivity of PEDOT-PSS to volatile organic compound (VOCs) by embedding it with (Au NSs) can suggest this nanocomposite to be applied in electronic devices.
Gold nanoparticle,PEDOT-PSS,Gas Sensor,Optical properties,electrical conductivity
https://ajnsa.journals.ekb.eg/article_9177.html
https://ajnsa.journals.ekb.eg/article_9177_e1d73396ed031b42349293e85e606398.pdf
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
Arab Journal of Nuclear Sciences and Applications
1110-0451
2090-4258
51
4
2018
10
01
Low cost natural adsorbent for removal of Pb(II) ions from waste solutions
19
30
EN
E
A
Abdel-Galil
Atomic Energy Authority, Hot Labs. Centre
ezzat_20010@yahoo.com
hoda
rizk
Atomic Energy Authority, Hot Labs. Centre
ahmhoda@gmail.com
W
M
El-kenany
Atomic Energy Authority, Hot Labs. Centre
for_wafaa@yahoo.com
10.21608/ajnsa.2018.2340.1026
In this paper, the adsorption behavior of Pb2+ ions from aqueous solution onto castor stem as a natural adsorbent was investigated under various experimental conditions. Characterization of castor sorbent was evaluated by SEM, XRD, FTIR, DT and TGA, BET surface area analysis, and CHNS elemental analyses. Operational parameters such as pH, contact time, initial ion concentration, sorbent dose, particle size, competing ions, and temperature were also studied. Adsorption data fitted well with the Langmuir and Freundlich models. However, Freundlich isotherm displayed a better fitting model than Langmuir isotherm because of the higher correlation coefficient that the former exhibited, thus, indicating to the applicability of multilayer coverage of the Pb (II) on the surface of adsorbent. On the basis of distribution studies, the distribution coefficient (Kd) increases with increasing the reaction temperatures of the solution. Thermodynamic parameters, ∆Ho, ∆Go, and ∆So were calculated and indicated an endothermic and spontaneous process. Castor is a good adsorbent for the removal of Pb(II) from heavy metals wastewater and confirmed the validity of the proposed method for real samples.
Castor,Characterization,Lead,Distribution studies,adsorption isotherms,Thermodynamics
https://ajnsa.journals.ekb.eg/article_9178.html
https://ajnsa.journals.ekb.eg/article_9178_18cf57059d4c1463b8022c8ac9ad78e6.pdf
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
Arab Journal of Nuclear Sciences and Applications
1110-0451
2090-4258
51
4
2018
10
01
Radiological Risk Assessment in A Type of Complex Petroleum Refinery in Egypt
31
43
EN
Islam Mahmoud
El-Sayed Ahmed
Othman
Environmental Studies
Institute of Graduate Studies and Research
Alexandria University
islam_mahmoud71@yahoo.com
Ibrahim
Hindawy
Saleh
Environmental Studies
Institute of Graduate Studies and Research
Alexandria University
igsr.ihindawy@alexu.edu.eg
Zekry
Fahmy
Ghatass
Environmental Studies
Institute of Graduate Studies and Research
Alexandria University
z_ghatass@yahoo.com
Mohamed
Abdel-Aziz
Metwally
Environmental Studies
Institute of Graduate Studies and Research
Alexandria University
Chairman & CEO of Middle East Oil Refinery (MIDOR).
info@midor.com.eg
10.21608/ajnsa.2018.2581.1034
Abstract<br /> The radiological and radioecological impacts associated with the uncontrolled release of TENORM in products and wastes released in the petroleum industry are of great concern. In this study, radiological risk assessment of TENORM in refined products, sludge, non-oil wastes and produced water are presented. Thirty-four statistically representative samples are divide into four groups; fourteen samples were refined petroleum products, nine samples were sludge waste, six samples were taken from used and fresh non-oil wastes and five samples were produced water. The activity concentrations of 232Th, 226Ra and 40K in all samples were measured by using gamma-ray spectrometry with high purity Germanium (HPGe) detector. The radium equivalent activity, external and internal hazard indices, gamma radiation absorbed doses rates and the annual effective dose were estimated. It was noticed that the maximum value of radium equivalent activity was found to be 308.773 Bq/kg and observed in ceramic balls used for catalyst bed support and it was lower than its recommended upper limit, which is 370 Bq/kg. The external and internal hazard indices were indicated. It is recommended that for workers who are working in maintaining and repairing equipment must use safety tools to protect them from the dangers of inhaling radon gas. Generally, the overall results revealed that the radiation levels would not pose any radiological risk occupationally or for the ambient environment. The results obtained in this study are very important in terms of establishing indicators and standards for radiation protection in this type of crude oil refining technology.
Complex petroleum Refinery,crude oil,Radiation Doses,Risk assessment,TENORM
https://ajnsa.journals.ekb.eg/article_9180.html
https://ajnsa.journals.ekb.eg/article_9180_cc8cabf082e88f58e650272a09596d9b.pdf
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
Arab Journal of Nuclear Sciences and Applications
1110-0451
2090-4258
51
4
2018
10
01
Evaluation the annual effective dose of the NORM decontamination workers during cleaning the oil and gas equipment
44
50
EN
Omar
Desouky
E.A.E.A
omardesouky@gmail.com
Tarek
Morsi
2Radiation protection Department
Nuclear Research Center
Egyptian Atomic Energy Authority
tarekmorsi2013@gmail.com
10.21608/ajnsa.2018.2644.1041
Oil and gas production processing operations have been known to produce a large amount of naturally occurring radioactive materials (NORMs) at elevated concentrations as by-product waste streams. This means that TE-NORM wastes from the oil & gas industry may generate radiation exposure levels, which require attention and continuous monitoring during NORM decontamination of oil and gas equipment. This exposure is mostly caused by external and internal radiation coming from the 226Ra &228Ra (U-238 and Th -232 series) radionuclide and their progenies. This study focuses on follow up the annual effective dose for workers during decontaminating naturally occurring radioactive materials (NORM) of oil and gas equipment. The external effective dose was evaluated using thermoluminescence detector (TLD). The obtained data showed that the range of the annual dose was from 1.07 to 1.78 mSv and the average dose of the ten workers under investigation was 1.4 ±0.24 mSv. The average dose is about 7 % of the occupational annual dose limit. We conclude that protective measures against external and internal contamination helped in the protection of the workers against NORM hazards)
Annual effective dose,NORM,Decontamination,OIL &GAS INDUSTRY
https://ajnsa.journals.ekb.eg/article_9181.html
https://ajnsa.journals.ekb.eg/article_9181_b50d8c1453dceca6828b45a9357ef6bc.pdf
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
Arab Journal of Nuclear Sciences and Applications
1110-0451
2090-4258
51
4
2018
10
01
Structural and Thermal Analysis of Carbon Nano-Particles/Polypyrrole/Poly (Ethylene – Co – Vinyl Acetate) Composites
51
61
EN
Rania
M.
Ahmed
Physics Department, Faculty of Science, Zagazig University
rania.7.8.2016@gmail.com
Ahmed
Abd Elbary
2Higher Institute of Engineering and Technology, Department of Mathematics and Physical science,
New Cairo Academy, 5th settlement, New Cairo City, Egypt
rrrrrgmal@yahoo.com
10.21608/ajnsa.2018.2715.1046
Polymeric materials and their composites have attracted great attention because of their great significance. This study includes preparation of composites of carbon nano-particles/Polypyrrole (CB/PPY) embedded in Ethylene-vinyl acetate copolymer (EVA) with different contents as 0, 5, 10, 15, 20 and 30 parts per hundred parts by weight of polymer (pph). X-ray diffraction (XRD) was investigated to characterize the structure of the prepared composites. Thermal analysis including differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) were measured to detect the miscibility degree of the composites and their thermal stability, respectively. The Gordon – Taylor equation was modified to fit the experimental values of the glass transition temperatures (Tg) at low and high contents of CB/PPY. The obtained values of Tg showed complete miscibility of most of the composites. From XRD measurements, the crystallinity of the composites was found to be decreased by embedding (CB/PPY) into EVA. The curves of TGA show more thermal stabilities for the composites compared to the pristine EVA.
DSC,TGA,XRD,EVA,carbon black,PPy
https://ajnsa.journals.ekb.eg/article_9182.html
https://ajnsa.journals.ekb.eg/article_9182_25d8dd0781867124224665649503c16b.pdf
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
Arab Journal of Nuclear Sciences and Applications
1110-0451
2090-4258
51
4
2018
10
01
NonBlind Robust 3D Object Watermarking Scheme
62
71
EN
Nour
Ashoub
Radiation Engineering Department ,Egyptian Atomic Energy Authority Cairo, Egypt.
nourashoub@gmail.com
Ahmed
Emran
Communication and Electronics Engineering , Al-Azhar university Cairo , Egypt.
ahmedemran83@gmail.com
mohamed
Kaloup
NCRRT
m.hassansaad@gmail.com
Ahmed
yahya
Communication and Electronics Engineering , Al-Azhar university Cairo , Egypt.
ahmed_yahya_1@yahoo.com
Hassan
Ibrahim
Saleh
0000-0001-5395-2214
Radiation Engineering Dept.,
h_i_saleh@hotmail.com
10.21608/ajnsa.2018.3415.1076
Robust digital watermarking is an evolving research area that has received a large amount of attention and became a practical solution to copyright protection. This paper proposes a robust and imperceptible non-blind watermarking method for high rate embedding into 3D polygonal meshes. Our approach consists of partitioning, embedding and extracting steps. First, the mesh is partitioned into smaller sub-meshes, and then the watermark bits are embedded into each vertex in spatial domain. The main attractive features of this approach are flexibility in data embedding technique and fast computation compared to other recent techniques. The results showed that the proposed algorithm provides high robustness against the most common attacks. The applied attacks include the geometric transformations, adaptive random noise; mesh smoothing, mesh cropping and combinations of these attacks. The results of our approach are compared with recent published methods in terms of robustness, imperceptibility and payload. Moreover, the compared methods and the proposed one are evaluated according to a standard benchmark.
Robust,Non-Blind Watermarking Algorithm,Spatial Domain,Information Security
https://ajnsa.journals.ekb.eg/article_9295.html
https://ajnsa.journals.ekb.eg/article_9295_cb2e897f63c7c1ce24e2cdfb38ff886e.pdf
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
Arab Journal of Nuclear Sciences and Applications
1110-0451
2090-4258
51
4
2018
10
01
Self-Calibrating Enabled Low Cost, Two Channel Type K Thermocouple Interface for Microcontrollers
72
80
EN
H.
Shaker
Egypt Second Research Reactor Complex, Atomic Energy Authority (AEA)
A.
Saleh
Egypt Second Research Reactor Complex, Atomic Energy Authority (AEA)
A. H.
Ali
Egypt Second Research Reactor Complex, Atomic Energy Authority (AEA)
M.
Abd Elaziz
Egypt Second Research Reactor Complex, Atomic Energy Authority (AEA)
10.21608/ajnsa.2018.12391
<strong>This paper presents a new design of a very low cost two-channel type K thermocouple interface circuit for micro-controllers. This interface circuit targets accurate temperature measurements for nuclear research instrumentation from 0 up to 250 degree Celsius with 1 degree resolution. The usage of the computational capabilities of a micro-controller is proposed to make an adaptive self calibration for the designed interface circuit. Also, these computational capabilities are used to solve the two major problems associated with thermocouples, namely the thermocouple non-linearity problems and the offset errors resulting from the thermocouple reference junctions.</strong>
Thermocouple amplifier board,self-calibration,Microcontroller
https://ajnsa.journals.ekb.eg/article_12391.html
https://ajnsa.journals.ekb.eg/article_12391_098788e1fcdeae91c5c92a5fef14a980.pdf
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
Arab Journal of Nuclear Sciences and Applications
1110-0451
2090-4258
51
4
2018
10
01
Effect of Essential Oils of Clove and Dill Applied as an Insecticidal Contact and Fumigant to Control some Stored Product Insects
81
88
EN
K. KH
El-Gizawy
Plant Protection Department, Faculty of Agriculture Moshtohor, Benha University, Egypt
S. M
Halawa
Plant Protection Department, Faculty of Agriculture Moshtohor, Benha University, Egypt
A. L
Mehany
Plant Research Department, Nuclear Research Center, Atomic Energy Authority, Egypt
10.21608/ajnsa.2018.12394
<strong>Contact and fumigation toxicity of Clove and Dill essential oils were investigated in the laboratory against the adults of <em>Sitophilusoryzae</em> (L.), <em>Rhyzoperthadominica</em> (F.) and <em>Triboliumcastaneum</em> (Herbst.). The results showed that insect mortality was increased by increasing plant oils concentration and the period of exposure. The adults of <em>S. oryzae</em> were the most susceptible insect species under study followed by <em>R. dominica </em>then <em>T. castaneum </em>which was the least sensitive to the two plant oils. The toxicity of Clove and Dill oils against the tested insects was much higher in the fumigant bioassay tests than in the contact method. Clove oil was more effective than Dill oil against the three insect species. The results indicated also that these plant oils could be used as grain protectants or fumigants to control stored products insects</strong>
https://ajnsa.journals.ekb.eg/article_12394.html
https://ajnsa.journals.ekb.eg/article_12394_85d01b0d047e5e9b3949916be1807384.pdf
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
Arab Journal of Nuclear Sciences and Applications
1110-0451
2090-4258
51
4
2018
10
01
Chemical Treatment of El Missikat Fluorite-Bearing ore Material, Egypt, for Recovery of Pure Yttrium Oxide
89
99
EN
M.M.H
Khalil
Faculty of Science, Ain Shams University, Cairo, Egypt
O.M.
El Hussaini
Nuclear Materials Authority, Cairo, Egypt
G.M.
Abd El Wahab
Nuclear Materials Authority, Cairo, Egypt
S.K
Swafy
Nuclear Materials Authority, Cairo, Egypt
10.21608/ajnsa.2018.12397
<strong>El Missikat fluorite-bearing ore material, Eastern Desert, Egypt, has been identified as containing a quantity of heavy rare earth elements (REE) such as yttrium fluorite mineral. Rare earth concentrate prepared from sulfate solution of El Missikat fluorite- bearing ore material assays 0.615% of REE. The solution was prepared from ore material by two subsequent thermal steps namely; fluorine deactivation by MgO and roasting by (NH<sub>4</sub>)<sub>2</sub>SO<sub>4</sub>.The deactivated roasted matrix was leached with hot distilled H<sub>2</sub>O to prepare the solution which assays 0.846g/L of REE. This solution was treated with 20g of oxalic acid to produce impure RE oxalate cake which was ignited at 950<sup>o</sup>C. It was then dissolved in concentrated HNO<sub>3</sub> to prepare the RE nitrate solution for extracting yttrium using tri butyl phosphate (TBP) in kerosene. The produced yttrium oxide was of 97.2% purity.</strong>
Yttrium,Extraction,TBP,Fluorite- bearing ore material
https://ajnsa.journals.ekb.eg/article_12397.html
https://ajnsa.journals.ekb.eg/article_12397_05b3701f7db237702ea2c2fdbb2ac52d.pdf
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
Arab Journal of Nuclear Sciences and Applications
1110-0451
2090-4258
51
4
2018
10
01
Enhancement of Lactic Acid Bacteria by Gamma Radiation to Inhibit Antibiotic Resistance of some Salmonella spp.
100
107
EN
N.A.
Abdallah
Microbiology Department, Faculty of Science, Ain- Shams University, Cairo, Egypt
H. A.
Hussein
Radiation Microbiology Department, National Center for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt
O.A.A.
Khalil
Radiation Microbiology Department, National Center for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt
olakhalil65@yahoo.com
S.
Abdel–Aal
Radiation Microbiology Department, National Center for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt
R. A.
El- Desokey
Radiation Microbiology Department, National Center for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt
10.21608/ajnsa.2018.12403
<strong>Forty nine isolates were isolated from 34 food samples using <em>Salmonella-Shigella</em> medium, 10 of them were identified biochemically as <em>Salmonella</em> sp., two of them were multidrug-resistant, and they showed a resistance to seven tested antibiotics (ampicillin, streptomycin, gentamicin, nalidixic acid, ciprofloxacin, tetracycline, amoxicillin). Molecular identification of these isolates proved that they were <em>Citrobacter ferundii</em> and <em>Proteus mirabilis</em>. The antimicrobial activity for <em>Lactobacillus acidophilus</em> ATCC 4356and <em>Streptococcus thermophiles</em> ATCC 19987 mixtureand their cell-free supernatant mixture were activated by low doses of gamma radiation (5 Gray for lactic acid bacteria & 20 Gray for supernatant). Results proved that on applying the two previously activated mixtures on chicken carcasses, supernatants completely killed the three pathogens(<em>Citrobacter ferundii</em>, <em>Proteus mirabilis</em> and <em>Salmonella </em><em>typhi</em> ATCC 14028 reference strain) during 4 hours while the lactic acid bacteria mixture killed them after 3 hours.</strong>
Lactic acid bacteria, Gamma radiation,Salmonella sp., Citrobacter ferundii, Proteus mirabilis
https://ajnsa.journals.ekb.eg/article_12403.html
https://ajnsa.journals.ekb.eg/article_12403_f8267d66b14f2ae171ae839487d0a0ec.pdf
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
Arab Journal of Nuclear Sciences and Applications
1110-0451
2090-4258
51
4
2018
10
01
Effect of the Number Shots of Laser on Structural Transformations and Optical Properties of ZnS Nanoparticles Thin Films
108
117
EN
A.Z.
Mohammed
Physics Department, Faculty of Science, Zagazig University, Zagazig, Egypt
N.J.
Mohammed
Physics Department, Faculty of Science, Al-Mustansiriyah University, Iraq
I.K.
Khudhair
10.21608/ajnsa.2018.12602
<strong>Effects of the number of shots of laser and annealing temperature on the structural, morphological, and optical properties of zinc sulfide nanoparticles (ZnS NPs) thin films, prepared by pulsed laser deposition technique (PLD), were investigated. XRD results show that ZnS NPs exhibit a hexagonal phase at 623k. Transformation in the shape of nanoparticles to nanoflowers and nanorods appeared with increasing number of shots of laser at the same annealing temperature (623K) was observed from scanning electron microscopy (SEM) images. The optical properties were studied from all transmittance data. The experimental results show that the as-deposited ZnS NPs film exhibit a cubic structure and the crystallinity increased in the annealed films. It is also found that the grain size of the as grown samples at 300K, rises linearly from 9 to 11 nm with increasing the number of shots from 1000 to 3000 and rapidly from 10 to 18 nm after annealing at 623K. Additionally, the increase of the number of shots from 1000 to 3000 leads to a decrease in the energy gap values and increases their values after heat treatment keeping their behavior decreasing as the number of shots of laser increases. Also, photoluminescence (PL) measurements explained quenching its value after annealing temperature.</strong>
ZnS,Pulsed laser deposition,Nanoparticles,Nano leaves,Nanoflowers,nanorods,Photoluminescence (PL),Annealing Temperature
https://ajnsa.journals.ekb.eg/article_12602.html
https://ajnsa.journals.ekb.eg/article_12602_d29891305d0d8e6359cf5ed29ea279c4.pdf
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
Arab Journal of Nuclear Sciences and Applications
1110-0451
2090-4258
51
4
2018
10
01
Role of Loss Mechanisms in the Breakdown of Argon Irradiated with IR Laser Radiation
118
125
EN
O.
Nassef
National Institute of Laser Enhanced Sciences, Cairo University, Giza, Egypt
onassef@niles.edu.eg
Yosr
Gamal
National Institute of Laser Enhanced Sciences, Cairo University, Giza, Egypt
ygamal@niles.edu.eg
10.21608/ajnsa.2018.12717
<strong>Threshold intensity measurements of the breakdown of argon are numerically analyzed. The breakdown is induced by a Nd: YAG laser radiation at wavelength of 1064 nm and pulse duration of 8.5 ns.The investigation considered argon over pressure range extended from 25 torr- 760 torr.The measured threshold intensity corresponding to this pressure range is found to vary between 5.4xl0<sup>11</sup> W/cm<sup>2</sup> and 1.1xl0<sup>11</sup> W/cm<sup>2</sup>. These are the experimental conditions given by Davis et al. [1]. The analysis considers an electron cascade model given previously by Evans and Gamal (1980) [2] and modified by Gamal and Shafik [3]. The model solves the time dependent energy equation numerically in addition to a set of equations describing the rate of change of the formed excited states population. For realistic results, most of the physical processes that might take place during the interaction of laser radiation with the gas are included in the modified model. The calculated threshold intensity showed reasonable agreement with the measured values over the tested pressure range. The obtained values of the electron energy distribution function as well as the time variation of the electrons density for selected gas pressures, revealed that photo-ionization of the formed excited states plays a minor role for electron generation and plasma formation over the studied gas pressure range. Collisional ionization is the main mechanism responsible for the breakdown process. The loss process, due to electron diffusion, is found to have significant contribution only at pressures ≤ 40 torr. On the other hand, the recombination process is acting in a pronounced manner for the higher pressure regime.</strong>
Laser induced argon plasma,inverse Bremsstrahlung absorption,electronic excitation,electron recombination
https://ajnsa.journals.ekb.eg/article_12717.html
https://ajnsa.journals.ekb.eg/article_12717_3e5bf884b55fc5d8f210f9b8d8f28dc8.pdf
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
Arab Journal of Nuclear Sciences and Applications
1110-0451
2090-4258
51
4
2018
10
01
Removal of Chromium from Liquid Waste by Gamma Aluminum Oxide (γ-Al2O3) Nanoparticles Synthesized using Citrate Sol–gel Method
126
134
EN
Waleed
Abdellah
0000-0002-4002-0191
Egyptian Nuclear and Radiological Regulatory Authority (ENRRA), Cairo, Egypt
wmsra@yahoo.com
ehab
abdelfattah
Egyptian Nuclear and Radiological Regulatory Authority(ENRRA) , Cairo, Egypt
ehab_samir89@yahoo.com
Hanan
Diab
Egyptian Nuclear and Radiological Regulatory Authority (ENRRA) , Cairo, Egypt
hnndiab@yahoo.co.uk
Ebtissam
ahmed
saad
Chemistry Department, Faculty of Science, Ain Shams University, Cairo, Egypt
ebtissamsaad@yahoo.com
10.21608/ajnsa.2018.3620.1084
Abstract<br /> Gamma Aluminum oxide (γ-Al2O3) nanoparticles of particle size less than 8 nm were synthesized from aluminum nitrate nonahydrate and citric acid fuel via a citrate sol-gel method. The prepared alumina products were characterized by means of X-Ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Field Emission Scanning Electron Microscope (FE-SEM) and High Resolution Transmission Electron Microscope (HR-TEM). Different phases of alumina like amorphous, γ- Al2O3 and α/γAl2O3 nanoparticles were obtained on changing the calcination temperature for the alumina samples. The adsorption properties of the active phase γ-Al2O3 for the removal of Cr(VI) from liquid waste were examined by batch adsorption study. The effect of different parameters such as initial pH value in solution, contact time and temperature on the adsorption performance of Cr (VI) onto γ-Al2O3 was studied . The adsorption process reached the equilibrium at 75 min and was found to be maximum at pH =3. The removal efficiency percent of Cr(VI) using γ-Al2O3 was increased with increasing temperature .The equilibrium adsorption was described with Langmuir model and the adsorption kinetics fits well pseudo- second-order model.
γ-Al2O3 Nanostructures,Cr(VI),Citrate Sol-gel Synthesis,Adsorption
https://ajnsa.journals.ekb.eg/article_15374.html
https://ajnsa.journals.ekb.eg/article_15374_88786040a60d84563e7739bf71d24eb1.pdf
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
Arab Journal of Nuclear Sciences and Applications
1110-0451
2090-4258
51
4
2018
10
01
Effect of Dietary Olive Cake on Reproductive and Physiological Traits of Native Pregnant Ewes
135
142
EN
A.
A.
El-Tarabany
Department of Biological Applications, Radioisotopes Applications Division, Nuclear Research Center, Atomic Energy Authority, Cairo, Egypt
M.
M.M.
Mostafa
Department of Biological Applications, Radioisotopes Applications Division, Nuclear Research Center, Atomic Energy Authority, Cairo, Egypt
A.
K.
Mohamed
Department of Biological Applications, Radioisotopes Applications Division, Nuclear Research Center, Atomic Energy Authority, Cairo, Egypt
10.21608/ajnsa.2018.12788
<strong>The aim of the present study is to evaluate the effect of feeding olive cake (OC) on the reproductive and physiological traits of pregnant ewes. This study was conducted on 117 pregnant ewes, 11-12 months age, with an average weight of 41.5 kg. The animals were divided into three equal groups; each group consisted of 39 ewes, given olives cake partitions representing 0, 15 and 30 % of the diet respectively. Feeding olive cake significantly (p < 0.05) increases the fertility rate and the proportion of twins, represented in an increment of ewes conceived twins (200-233%). Addition of olive cake in diets at a rate of 15 % resulted in significantly lower GOT, GPT, creatinine, urea, total lipid, cholesterol and estrogen levels. However, this led to increasing concentrations of progesterone hormone, in comparison with other groups. Thus, it can be recommended that using olive cake up to 15% in the diets of ewes has no negative effects on reproduction or physiological functions for improving twin’s percentage.</strong>
olive cake,Pregnant Ewes,Conceived twins,physiological traits
https://ajnsa.journals.ekb.eg/article_12788.html
https://ajnsa.journals.ekb.eg/article_12788_0809ab7d7be2fab58ce4dad172bb985f.pdf
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
Arab Journal of Nuclear Sciences and Applications
1110-0451
2090-4258
51
4
2018
10
01
Insight on Radiological Risk Assessment and its Statistical Evaluations for Abu Dabbab Albite Granite Mining area, Central Nubian Shield, Egypt
143
167
EN
Mohamed Tharwat
Salah
HEIKAL
Department of Geology, Faculty of Science, Tanta University, EGYPT
mohamed.hekal1@science.tanta.edu.eg
S.
Gomaa
Sinotharwa Drilling Company, Cairo
Mohamed
Abd El Monsef
Geology Department, Faculty of Science, Tanta University, Egypt
A.A.
Taha
Nuclear and Radiological Regulatory Authority, Egypt
G.
Top
Istanbul Technical University (ITU), Eurasia Institute of Earth Sciences, İstanbul, Turkey & Szent Istvan University(SZIE)
K.
Mahmoud
Physics Department, Faculty of Science, Kafr El Sheikh University, Egypt
M.
El- Mansi
Nuclear Materials Authority, Egypt
10.21608/ajnsa.2018.3686.1086
Abstract The study referred to determine the possible radiological risks by the help of internationally approved health hazard indices derivated by field and laboratory gamma measurements performed for surface, adit and core samples from Gabal Abu Dabbab albite granite Ta-Nb-Sn mining area, which is located some 50 km northwestern Marsa Alam city within the central Nubian Shield of Egypt. The field measurements were taken by portable RS-230 γ-ray spectrometer and the laboratory spectrometric analyzes were verified by HPGe detector for the radioactivity measurements of 238U, 226Ra, 232Th and 40K (Bq/kg) in the studied samples to assess their radiation hazards. Statistical depicting groups, summary statistics and two sample comparison tests (t-test and Mann-Whitney test) were used for statistical evaluations. The gamma-ray radioactivity levels of surface samples maximized to 94.68, 61.64, 45.10 and 1051.62 Bq/kg for 238U, 226Ra, ³²Th and ⁴⁰K respectively, whereas adit samples reached to 206.47, 113.16, 198.7, 939.43 Bq/kg and core samples reah to 108.23, 54.17, 43.47, 939.42 respectively. Almost values of the radiation hazard indices in the studied samples were under the health hazard limits
Keywords: Abu Dabbab albite granite,central Nubian Shield,Egypt,natural radioactivity- RS-230 & HPGe spectroscopy,Statistical Analysis,radiological risk assessment
https://ajnsa.journals.ekb.eg/article_15375.html
https://ajnsa.journals.ekb.eg/article_15375_3263ed05016eaa0644a4669bcc2ae0c0.pdf
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
Arab Journal of Nuclear Sciences and Applications
1110-0451
2090-4258
51
4
2018
10
01
Dosimetric Evaluation of The Field-In-Field Technique For Large Breast Cancer Irradiation.
168
174
EN
Mohammed
Elywa
Physics Department, Faculty of science,Zagazig University, Zagazig, Egypt
elywa2006@gmail.com
Shaimaa
Elnabawy
Zigzag Uni
elywa20006@gmail.com
10.21608/ajnsa.2018.3724.1093
The aim of this work is using multi-segmented conformal radiotherapy, field in field (FIF) for large breast cancer treatment, the dose coverage of the planning target volume (PTV) and evaluation the radiation load on the organs at risk (OARs). Ten patients with large breast of mean PTV was 1489 ± 335 Cm3 were included. Many parameters used in the dose evaluations in the planning target volume (PTV) and the organs at risk (OARs) volume including ipsi lateral lung, heart, and the contralateral breast, Dose homogeneity index (DHI) and conformity index (PITV). The FIF technique for all patients improved the homogeneity and conformity of the PTV, where the mean values of maximum dose of the PTV was 107%, the volumes over the prescription dose in irradiated volumes received very low doses. For each dosimetry of the organs at risk, the FIF technique reduced the dose received to theses organs. In conclude the FIF technique provided better dose distribution in the PTV and reduced the doses in the OARs and improving homogeneity and conformity of the planning volume.
linear accelerator (LINAC),FIF technique,planning target volume,Dose homogeneity index,breast cancer
https://ajnsa.journals.ekb.eg/article_15376.html
https://ajnsa.journals.ekb.eg/article_15376_5facfe0798ac95d51bf50ea97a333198.pdf
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
Arab Journal of Nuclear Sciences and Applications
1110-0451
2090-4258
51
4
2018
10
01
Green synthesis of Spherical Gold Nanoparticles by Chitosan for 6 Mercaptopurine Delivery
175
180
EN
amna
hussein
ahmed
lecturer assistant at NILES,Cairo university
amna_hussein090@yahoo.com
Yehia
abd elhameed
Badr
professor in laser science and interaction at NILES,cairo university
ybadr@niles.edu.eg
Samia
A.
Shouman
Cancer Biology Department, National Cancer Institute, Cairo University
Mahmoud
A.
Sliem
Laser science and interaction, National Institute of Laser Enhanced Sciences, Cairo University
10.21608/ajnsa.2018.2628.1039
In our present work gold nanoparticles were successfully prepared using chitosan as reducing and capping agent and subsequently used as carriers for hydrophobic anticancer 6 mercaptopurine (6MP). The use of this drug is limited due to its poor bioavailability. The purpose of the present investigation was to evaluate a method for loading hydrophobic drug 6MP on chitosan reduced gold nanoparticles (AuNPs).The resulting AuNPs and 6MP loaded AuNPs were characterized by ultraviolet visible spectrophotometry, transmission electron microscopy. To estimate the improvement of the drug delivery of AuNPs, breast cancer cells MCF7 were treated with 6MP and 6MP loaded AuNPs and cell viability was studied in vitro using Sulphorhodamine-B (SRB) assay. The data showed, both free 6MP and 6MP loaded AuNPs revealed anti-proliferation activity against the cancer cells in dose-dependent manners. Moreover, 6MP loaded AuNPs displays significantly greater anti-proliferation activity than that of free 6MP at all concentrations and IC50 1.93nM. The improvement of anti-proliferation activity of 6MP loaded AuNPs compared to that of 6MP can be attributed to enhanced intracellular uptake of the functionalized GNPs via the mechanism of endocytosis
Keywords: Breast cancer,6 mercaptopurine (6MP),Chitosan,gold nanoparticles (AuNPs)
https://ajnsa.journals.ekb.eg/article_15377.html
https://ajnsa.journals.ekb.eg/article_15377_a2a9c830c70a733b84bf89c7c6e2cf0d.pdf
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
Arab Journal of Nuclear Sciences and Applications
1110-0451
2090-4258
51
4
2018
10
01
Improvement of 6-mercaptopurine Efficiency by Encapsulated in Chitosan Nanoparticles
181
186
EN
amna
hussein
ahmed
lecturer assistant at NILES,Cairo university
amna_hussein090@yahoo.com
yehia
abd elhameed
badr
professor At NIES, cairo university
ybadr@nies.edu.eg
10.21608/ajnsa.2018.2630.1040
6-mercaptopurine is a cytotoxic and immunosuppressant drug. The use of this drug is limited due to its poor bioavailability and short plasma half-life. Chitosan nanoparticles exhibit great interest for nanomedicine, biomedical engineering and development of new therapeutic drug release systems with improved bioavailability, increased specificity and sensitivity, and reduced pharmacological toxicity. The main objective of this study is to formulate 6mercaptopurine (6MP) encapsulated chitosan nanoparticles (6-MP-CNPs) using with Tripolyphosphate (TPP) as cross-linker for anti-cancer therapy in order to enhance cytotoxcicty and bioavailability . Chitosan nanoparticles exhibited a small particle<br /> size and a high surface charge .The prepared nanoparticles were characterized by transmission electron microscopy, zeta potential. The average particle size determined through TEM was found to be 90 ± 10 nm and after encapsulation the particle size show an obvious increase. Zeta potential 26.2±6.35 mV. 6-MP-CNPs showed enhancement in cellular inhibition of breast cancer cell line MCF7 compared to free 6MP.
Key words:Chitosan Nanoprtices,6 mercaptopurine,Cytotoxicity,Drug delivery
https://ajnsa.journals.ekb.eg/article_15378.html
https://ajnsa.journals.ekb.eg/article_15378_a78c6b8241189260860995169a423697.pdf
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
Arab Journal of Nuclear Sciences and Applications
1110-0451
2090-4258
51
4
2018
10
01
Effect of Gamma Irradiation on the Physical and Chemical Properties of Copper-Poly Vinyl Pyrolidone Composite Films
187
196
EN
S.
A.
Waly
Radiation Chemistry Department, National Center for Radiation Research and Technology, Atomic Energy Authority, Cairo, Egypt
M.
Shehata
Radiation Chemistry Department, National Center for Radiation Research and Technology, Atomic Energy Authority, Cairo, Egypt
mohamed.shehata@eaea.org.eg
H.
H.
Mahmoud
Central Laboratory for Elemental and Isotopic Analysis, Nuclear Research Center, Atomic Energy Authority, Cairo, Egypt
10.21608/ajnsa.2018.13517
<br /> <br /> <br /> <br /> <br /> <br /> <strong>Received 3<sup>th </sup>Jan. 2017</strong><br /> <strong>Accepted 1<sup>st</sup> Aug. 2017 </strong><br /> <br /> <br /> <br /> <br /> <br /> <strong>Polymer composite films based on poly-vinylpyrrolidone (PVP) doped with different copper concentrations in 1 % HNO<sub>3</sub> were prepared using the solution cast technique. The polymer films were subjected to <sup>60</sup>Co γ-ray source at various doses ranging between 100 and 400 kGy. The effect of Cu ions concentration and </strong><strong>g</strong><strong>-irradiation doses on the physico-chemical properties have been investigated. FTIR spectra gave information about vibration changes that occurred due to copper dopant and </strong><strong>g</strong><strong>-irradiation doses. XRD results indicated that the amorphous domain of the PVP polymer matrix was increased with increasing of the dopant concentration. The surface morphology was examined (SEM). The</strong><strong>electrical conductivity was increased with the increase of the Cu dopant concentration and </strong><strong>g</strong><strong>-irradiation dose. The direct and indirect optical band gap values were decreased to 3.09 and 2.84 eV respectively as the irradiation dose wad increased to 400 kGy.</strong>
Cast technique,Gamma Irradiation,Poly-vinyl pyrrolidone (PVP),FTIR,XRD,SEM,Ionic conductivity,Optical band gaps
https://ajnsa.journals.ekb.eg/article_13517.html
https://ajnsa.journals.ekb.eg/article_13517_b37c598eb904383600fdc66e139cd4b0.pdf
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
Arab Journal of Nuclear Sciences and Applications
1110-0451
2090-4258
51
4
2018
10
01
Natural Radioactivity Levels and the Corresponding Radiation Exposure in Agricultural Environment in Hail, KSA
197
203
EN
Ahmed
El-Sharkawy
0000-0003-4518-9970
Nuclear and Radiological Regulatory Authority, Cairo, 11762, P.O.Box 7551, Egypt
ahmedtharwat741@gmail.com
Al-Jawhara
Al-Muqren
Physics Department ,College of Science, Princess Nora University, Kingdom of Saudi Arabia
10.21608/ajnsa.2018.13519
<strong>The natural radioactivity levels in groundwater, soil and crops have been determined in seven farms at Hail region in Saudi Arabia to assess any radiological hazards to the public, and to maintain a radiological map of natural radioactivity levels in this region. The radium isotopes (<sup>226</sup>Ra and <sup>228</sup>Ra) were measured in groundwater samples collected from wells in these farms, and the <sup>228</sup>Ra activity concentrations exceeded the national guidance level of 2.7 pCi/L set by Saudi Arabian Standards Organization (SASO) and the WHO. These relatively higher activities did not contribute to the annual effective dose rate from the ingestion of both isotopes (<sup>226</sup>Ra and <sup>228</sup>Ra) in the analyzed crops, which showed lower values than the upper limit of 1 mSv/yr. The activity concentrations of <sup>228</sup>Ra in soils of five farms were found to be higher than the world average value reported by the (United Nations Scientific Committee on the Effects of Atomic Radiation) UNSCEAR. These relatively higher activities contributed to the absorbed dose rate in air from external gamma radiation which was higher than the world average value of 57 nGy/hr in some farms. These high activities contributed also to the annual effective dose which showed values higher than the world average value of 0.07 mSv/yr for outdoor terrestrial gamma radiation in three farms. On the basis of these results, it can be concluded that the presence of such activities in the groundwater and crops samples do not pose any radiological hazards or significant risk to the public and animals, since they drink these waters. it may be recommended that the activity levels of the combined radium isotopes in the animal products (milk and meat) and the annual effective dose should be estimated to evaluate the contribution of the <sup>228</sup>Ra exceeded limits in these wells.</strong>
Radium isotopes,Hail, natural radioactivity,Soil,crops,gamma spectrometry,Transfer factor,Dose Assessment
https://ajnsa.journals.ekb.eg/article_13519.html
https://ajnsa.journals.ekb.eg/article_13519_3204026d72fb82bd016ad921b403f303.pdf
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
Arab Journal of Nuclear Sciences and Applications
1110-0451
2090-4258
51
4
2018
10
02
Risk Analysis using Fuzzy System based Risk Matrix Methodology
204
212
EN
Magdy
Mahmoud
Zaky
ETRR-2, EAEA, Egypt
zaky_magdy@yahoo.com
10.21608/ajnsa.2018.2448.1047
this paper proposes a new risk assessment methodology using the fuzzy logic model based on the risk matrix information. The structure of the Fuzzy Inference System (FIS) formed in fuzzifier, knowledge base and defuzzifier. The input and output of the fuzzy system are simulated in crisp value. The proposed fuzzy model; and operator experiences were the devices for making the rules and inherent connection between variables in the fuzzy model. Fuzzy logic is one of the intelligence systems and it has wide range applications in fault analysis, event classification, accident analysis, safety and risk assessment. The structure of risk matrix reflects the shape of the membership functions and the If-Then rules of the fuzzy model design. The risk matrix is simulated in fuzzy approach to making it easier as a model based on If-Then rules. Simulation results investigated and illustrated that fuzzy logic system gives many advantages for risk assessment such as the dynamic modeling in If-Then rules.
risk analysis,Risk matrix methodology,Fuzzy system applications in risk analysis
https://ajnsa.journals.ekb.eg/article_15679.html
https://ajnsa.journals.ekb.eg/article_15679_3d527a35389cde432c9d00439561b1bb.pdf
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
Arab Journal of Nuclear Sciences and Applications
1110-0451
2090-4258
51
4
2018
10
01
Estimation of the Reactivity Temperature Coefficients of the AP-1000 Reactor by MCNPX Code
213
220
EN
heba
kareem
louis
Safety Engineering Department, Nuclear and Radiological Regulation Authority (NRRA), Cairo, Egypt
heba.louis@yahoo.com
10.21608/ajnsa.2018.2758.1048
The estimation of temperature coefficients of reactivity is a very important task because of its relationship to the safety of reactor operation. The temperature coefficient of reactivity includes the Moderator Temperature Coefficient (MTC), Doppler temperature coefficient (DTC) and the isothermal temperature coefficient (ITC). The present work investigated the temperature coefficients of reactivity for the advanced first core of AP1000 PWR. The calculations were carried out using Monte Carlo code MCNPX and the Evaluated Neutron Data File library, ENDF/B-VII.1 (ENDF71x), cross section data. The calculated results have been compared with the same results of KENO and VERA-CS codes. The study was investigated at a boron concentration of 1300 ppm. The MCNPX values of the MTC, DTC, and ITC were observed to be: (-1.27), (-1.48), (-2.75) pcm/F respectively. The results showed the compatibility between the MCNPX and KENO and VERA codes. Also the results demonstrate that the MCNPX code showed good estimates of Temperature Coefficients of Reactivity of AP-1000 PWR. The results can be used as reference for reactor physics studies.
AP1000,Temperature Coefficients of Reactivity,MCNP code
https://ajnsa.journals.ekb.eg/article_15680.html
https://ajnsa.journals.ekb.eg/article_15680_e6aca8d0ca96370093e7dd1320736bda.pdf
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
Arab Journal of Nuclear Sciences and Applications
1110-0451
2090-4258
51
4
2018
10
01
A Study of 226Ra Concentration Ratios for Leafy Vegetables
221
227
EN
Ahmed
El-Sharkawy
0000-0003-4518-9970
Nuclear and Radiological Regulatory Authority, Cairo, 11762, P.O.Box 7551, Egypt
ahmedtharwat741@gmail.com
Hekmat
Elbegawy
Nuclear and radiological Regulatory Authority, Cairo
hekmat.elbegawy@yahoo.com
Heba
Abd El Ghaffar
Quality Assurance Dep., Nuclear and radiological Regulatory Authority, Cairo
hebaforever@yahoo.com
10.21608/ajnsa.2018.3671.1085
The aim of this work was to study the factors that influence the 226Ra uptake by two types of leafy vegetables collected from different farms in Al Sharqiya region in Saudi Arabia with their corresponding soils and irrigation waters. Quality assurance and validation of the radioanalyses for the different samples matrices were carried out. It was a reasonable approach to determine the 226Ra concentration ratios on the basis of both the exchangeable and total 226Ra content in the soils. It was found that the activity concentration of 226Ra in soils is independent on its corresponding activities in irrigation water but correlates well with the soil content of clay and silt. No significant dependency of the 226Ra concentration ratios for the studied vegetables on the radium total activities in soils. Good negative correlations were found between the organic matter content of soils and the concentration ratios of 226Ra in cabbage and lettuce. Some variations of the 226Ra uptake were found through the two leafy vegetables which may be explained by other factors related to the metabolic characteristics of the plant species. The 226Ra concentration ratios based on the exchangeable radium leached from soil for cabbage and lettuce were found to be higher than those determined on the basis of its total activity in soil. The exchangeable 226Ra may contribute for a better understanding of its uptake by leafy vegetables in these farms.
Concentration ratio,Agricultural farms,leafy vegetables,226Ra,exchangeable radium,Gamma spectroscopy,Saudi Arabia
https://ajnsa.journals.ekb.eg/article_15684.html
https://ajnsa.journals.ekb.eg/article_15684_e8d06b62cb4fbd7b8b91f8c7860650f7.pdf
Egyptian Society of Nuclear Sciences and Applications (ESNSA)
Arab Journal of Nuclear Sciences and Applications
1110-0451
2090-4258
51
4
2018
10
01
The Zug El Bohar hydrothermal uranium-base metal deposits, southwest El Quseir, Red Sea Coast, Egypt
228
247
EN
Soliman
Mahmoud
Nuclear Materials Authority
dr.soliman72@yahoo.com
Nariman
Mosleh
Nuclear Materials Authority
karem_249@hotmail.com
Gehad
Mansour
Nuclear Materials Authorioty
gehad_mansour@yahoo.com
10.21608/ajnsa.2018.3801.1091
The Zug El Bohar area belongs to the Red Sea coastal plain of Egypt. Lithostratigraphically, this area is represented by a section of Late Cretaceous-Late Miocene sedimentary rocks and it is affected by both a WNW-ESE sinistral strike-slip fault and a NNW-SSE shear zone. The deposits in the NNW-SSE shear zone were subjected to mineralogical and geochemical studies in order to elucidate the importance of these sediments for hosting valuable minerals. The geochemical study indicated that the shear zone has an abnormal concentration of U as well as high concentrations of Mo, Pb, and Zn and As. Whereas the mineralogical study has not been detected any uranium minerals, whereas minerals such as wulfenite (PbMoO4), zaccagnaite [Zn4Al2(CO3)(OH)12.3H2O] and baileychlore [(Zn,Fe2+,Al,Mg)6(Si, Al)4O10(OH)8)], mimetite [Pb5(AsO4)3Cl], calcian mimetite, arsenatian vanadinite [Pb5(V,As)O4Cl], Galena (PbS) and zinnwaldite [KLiFeAl(AlSi3)O10(OH,F)2], celestite (SrSO4) were identified.<br /> <br /> The deposits of the shear zone were formed due to a moderately oxidized saline fluid that led to precipitate minerals with a change in pH and temperature. The presence of CaCO3 and sulfate in the shear were played an important role in a decreasing adsorption of U on ferrihydrite and the disequilibrium with its daughters as well as the precipitation of Mo, Pb, Zn , As and REE from the mixed solution.
Zug El Bohar,El Quseir,Red Sea coastal plain,Shear zone,Disequilibrium and hydrothermal solution
https://ajnsa.journals.ekb.eg/article_15685.html
https://ajnsa.journals.ekb.eg/article_15685_3c23add10ed0857324b1d1ef818ea4fe.pdf