scholarly journals New Improved Thermoluminescence Magnesium Silicate Material for Clinical Dosimetry

2021 ◽  
Author(s):  
Mohamed Ragab Abass ◽  
Hassan M. Diab ◽  
Mamdouh M. Abou-Mesalam
Keyword(s):  
Gamma Radiation ◽  
Dose Range ◽  
Magnesium Silicate ◽  
Silicate Glasses ◽  
Silicate Material ◽  
Linear Behavior ◽  
Range Correlation ◽  
Total Integral ◽  
Energy Independence ◽  
Different Doses

Abstract Magnesium silicate has been prepared by a precipitation technique. This composite structure was proven by different tools, XRD, TGA&DTA, FTIR, and XRF. Magnesium silicate was found to have the formulas Mg1.1SiO3.2.1.1H2O. Thermoluminescence (TL) dosimetric properties like (linearity, fading, energy independence) of magnesium silicate in the shape of MgSiO3 have been estimated. A strong TL dosimetry peak associated with gamma radiation arises from 137Cs was developed. Different doses from gamma radiation were measured by thermoluminescence (TL) detection technique for magnesium silicate glasses in unique magnesium elements concentration to assess its dosimetric properties. A single strong peak of about 230 °C arises for all irradiated samples. Total integral values of TL output and TL of the principal peak values showing a linear behavior start with 0.5 Gray up to 2 Gray dose range. Correlation of magnesium silicate TL response and different doses showed dose-response improvement concerning low doses linear relationship.

scholarly journals Spectrum and Frequency of Mutations Induced by Gamma Radiations in Three Varieties of Nigerian Sesame (Sesamum indicum L.)

2018 ◽  
Vol 10 (1) ◽  
pp. 87-91
Author(s):  
Muhammad Liman MUHAMMAD ◽  
Ahmed Olamide FALUSI ◽  
Matthew Omoniyi ADEBOLA ◽  
Onyedi David OYEDUM ◽  
Aishatu Adamu GADO ◽  
...  
Keyword(s):  
Genetic Variability ◽  
Gamma Radiation ◽  
Gamma Rays ◽  
Dose Range ◽  
Sesamum Indicum ◽  
Leaf Axil ◽  
Fruit Traits ◽  
Breeding Programmes ◽  
Gamma Radiations ◽  
Different Doses

Insufficient genetic variability is one of the major problems of plant breeding programmes, especially in sesame. Gamma radiation has been reported to be very effective in creating genetic variability in plants. Three varieties of Nigerian sesame were assessed for spectrum and frequency of mutation induced by Gamma radiations in M1 and M2 generations. The varieties (NCRIBEN-04E, NCRIBEN-01M and NCRIBEN-03L) were treated with four different doses of gamma rays (250, 350, 450 and 550 Gy). The treated and untreated seeds (control) were sown in planting bags (under field condition) to raise M1 plants. Four treatments: V1D5, V2D3, V3D2 and V3D4 (from M1 plants) were selected and bulked to obtain M2 populations. The results of M1 revealed four mutant fruit traits: multicarpellate capsule, multiple capsule per leaf axil, indehiscent capsule and terminal capsules. The highest frequencies of the traits in M1 generation were 2.50×10-2, 9.17×10-2, 1.67×10-2and3.33×10-2 respectively. The highest branching (7) was from NCRIBEN-01M, while the least (2) was from NCRIBEN-04E. The M2 plants were grouped into eight M2 lines. The dose range (250-550 Gy) was proved to be effective in inducing viable mutations in sesame.

scholarly journals The effect of CO60 on the physical and physicochemical properties of rice

2012 ◽  
Vol 36 (2) ◽  
pp. 210-216 ◽  
Author(s):  
Ívina Catarina de Oliveira Guimarães ◽  
Joelma Pereira ◽  
Vanda Maria de Oliveira Cornélio ◽  
Luís Roberto Batista ◽  
Eric Batista Ferreira
Keyword(s):  
Chemical Composition ◽  
Gamma Radiation ◽  
Physicochemical Properties ◽  
Titratable Acidity ◽  
Production Chain ◽  
Caloric Value ◽  
Total Titratable Acidity ◽  
Radiation Conditions ◽  
Different Doses ◽  
Co60 Gamma

Owing to its chemical composition and production chain, rice is susceptible to contamination by fungi. Among other techniques, the application of gamma radiation has been suggested as a method to ensure food safety. However, such radiation can alter the chemical composition of the food. Thus, the objective of the present work is to evaluate the centesimal composition, caloric value, pH, total titratable acidity, and coloration of polished white rice subjected to different doses of Co60 gamma radiation (0 kGy, 6.5 kGy, and 7.5 kGy). The results demonstrated that while gamma radiation did not cause significant alterations in the centesimal composition, caloric value, and titratable acidity of the rice, increasing doses substantially decreased the pH and intensified the coloration. Under controlled radiation conditions, a 6.5-kGy dose can render rice safe for consumption without significantly compromising its physical and physicochemical properties.

scholarly journals IV. Effect of 60Co gamma rays on survival rate of China aster plants (Callistephus chinensis Nees) in M1 generations - under field conditions

2013 ◽  
Vol 35 (2) ◽  
pp. 277-283
Author(s):  
A. Wosińska
Keyword(s):  
Survival Rate ◽  
Gamma Radiation ◽  
Gamma Rays ◽  
Lethal Effect ◽  
Field Conditions ◽  
Considerable Decrease ◽  
Planting Time ◽  
Variety Effect ◽  
China Aster ◽  
Different Doses

Studies were undertaken on the effect of different doses of gamma radiation on survival rate of plants (germinated from irradiated seeds) for 5 China aster varieties specified at florescence time. During their growth under field conditions (from planting time to blooming) lethal effect of the radiation occurred in plants of all varieties and its level depended on dose and variety. Effect of 3 kR and 6 kR doses differed depending on variety and was not always harmful, but following irradiation with doses exceeding 6 kR a considerable decrease in survival rate was observed. Radioresistance of studied varieties - measured both: by LD<sub>50</sub> and LD<sub>l00</sub> - differed; depending on variety, LD<sub>50 </sub>and LD<sub>l00</sub> values fluctuated: from 6 to 9 kR and 12 to 15 kR respectively.

scholarly journals Effect of Gamma Radiation on Characteristic of bipolar junction Transistors (BJTs )

2021 ◽  
pp. 1-9
Author(s):  
Abdenabi Ali Elamin ◽  
Waell H Alawad
Keyword(s):  
Gamma Radiation ◽  
Power Supplies ◽  
Strong Increase ◽  
Bipolar Junction Transistors ◽  
Bipolar Junction Transistor ◽  
Before And After ◽  
Junction Transistor ◽  
The Individual ◽  
Silicon Transistor ◽  
Different Doses

This paper describes the effects of 60Cogamma radiation hardness of characteristic and parameters of Bipolar Junction Transistors in order to analyze the performance changes of the individual devices used in nuclear field. Bipolar Junction Transistor (BJT) of the type (BC-301) (npn) silicon, Transistor was irradiated by gamma radiation using 60Cosource at different doses (1, 2, 3, 4, and 5) KGy. The characteristics and parameter of Bipolar Junction Transistor was studied before and after irradiated by using Transistor Characteristics Apparatus with regulated power supplies. Obtained result showed that, the saturation voltage VCE(sat) of Bipolar Junction Transistor decreased because of the gain degradation of the transistor and increased silicon resistivity, Another parameter of a bipolar junction transistor affected by ionizing radiation is a collector-base leakage current, a strong increase of the current is caused by the build-up charge near the junction.

scholarly journals Improvement of Wax Oil Content of Embryonic Callus of Jojoba Using Gamma Radiation

2019 ◽  
Vol 29 (2) ◽  
pp. 207-217
Author(s):  
Hattem M. El-Shabrawi ◽  
Hend E. Wahba ◽  
Ahmed M. Gabr ◽  
Shafik I. El-Morsy ◽  
Mohamed A. Saber ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Gamma Radiation ◽  
Embryogenic Callus ◽  
Oil Content ◽  
Leaf Explants ◽  
Simmondsia Chinensis ◽  
Oil Bodies ◽  
Embryonic Callus ◽  
Total Fatty Acids ◽  
Different Doses

Embryogenic callus was obtained from the leaf explants of jojoba (Simmondsia chinensis (Link) Schneider cultured on MS containing 0.5 mg/l NAA and 0.5 mg/l Kn. Growth of embryonic callus increased in 0.5 mg/l Kn + 6% sucrose. In order to improve oil content, the embryonic callus was exposed to different doses (5, 10 and 15 Kr) of gamma radiation. It was found that oil content of embryonic callus of jojoba increased 1.41% by exposing to 5 Kr gamma radiation. Also, size of oil bodies in embryonic callus irradiated with 5 Kr increased compared to control. Furthermore, production of the fatty acids was enhanced by gamma irradiation. The highest percentage of total fixed oil (1.41) was recorded in 5 Kr radiation. However, the highest content of total fatty acids (98.612) was obtained when embryonic callus were exposed to 10 Kr of gamma radiation.

SnO-reinforced silicate glasses and utilization in gamma-radiation-shielding applications

2020 ◽  
Vol 9 (3) ◽  
pp. 1000-1008 ◽  
Author(s):  
Yasser Saad Rammah ◽  
Ashok Kumar ◽  
Karem Abdel-Azeem Mahmoud ◽  
Raouf El-Mallawany ◽  
Fouad Ismail El-Agawany ◽  
...  
Keyword(s):  
Gamma Radiation ◽  
Radiation Shielding ◽  
Silicate Glasses

Boro-silicate glasses co-doped Er+3/Yb+3 for optical amplifier and gamma radiation shielding applications

2019 ◽  
Vol 567 ◽  
pp. 37-44 ◽  
Author(s):  
Mustafa Dh Hassib ◽  
Kawa M. Kaky ◽  
Ashok Kumar ◽  
Erdem Şakar ◽  
M.I. Sayyed ◽  
...  
Keyword(s):  
Gamma Radiation ◽  
Optical Amplifier ◽  
Radiation Shielding ◽  
Silicate Glasses ◽  
Co Doped

Recovery of Sulfur-Alkaline Waste by Processing into Cellular Silicate Material

2018 ◽  
Vol 22 (10) ◽  
pp. 24-27
Author(s):  
Ya I. Vaisman ◽  
I.S. Glushankova ◽  
Yu.A. Ketov ◽  
L.V. Rudakova ◽  
M.P. Krasnovskikh
Keyword(s):  
Amorphous Silicon ◽  
Sodium Hydroxide ◽  
Silicon Oxide ◽  
Silicate Glasses ◽  
Alkaline Solutions ◽  
Organosulfur Compounds ◽  
Silicate Material ◽  
Mechanism Of Formation ◽  
Alkaline Waste ◽  
Amorphous Silicon Oxide

The formation of cellular silicate glasses from sulfide-alkaline solutions and amorphous silicon oxide has been studied. The mechanism of formation of silicates from sodium hydroxide and amorphous silicon oxide and processes of gasification with the participation of the organic component of waste are considered. Technological solutions for recovery of sulfide-alkaline solutions are proposed. At the same time, the process of recovery consists in mixing sulfuralkaline waste with natural amorphous silicon oxide, tripoli, and further roasting the resulting composition at glass formation temperatures. As a result of heat treatment, sulfur from organosulfur compounds is oxidized to sulfur (IV), and sodium hydroxide, after dehydration, enters in composition of the resulting vitreous silicate cellular material.

Sign in / Sign up

Export Citation Format

Share Document