scholarly journals Estimate the lifetime of thermoluminescence traps in general-orders of kinetics model of chilli powder samples by using the R package TGCD

2017 ◽  
Vol 1 (T4) ◽  
pp. 71-78
Author(s):  
Sang Duy Nguyen ◽  
Hung Van Tran ◽  
Hien Quoc Nguyen ◽  
Hung Van Nguyen
Keyword(s):  
Kinetic Parameters ◽  
Gamma Rays ◽  
Glow Curve ◽  
R Package ◽  
Kinetics Model ◽  
Recombination Probability ◽  
Order Of Kinetics ◽  
Three Samples ◽  
Powder Samples ◽  
Different Doses

The kinetic parameters of thermoluminescene (TL) glow peaks of chilli powder irradiated by gamma rays with the different doses of 0, 4 and 8 kGy (i.e. activation energies (E), order of kinetics (b), trapping and recombination probability coefficients (R) and frequency factors (s)) have been determined and evaluated by glow curve deconvolution (GCD) method using the glow curve data to estimate lifetime of TL traps. The kinetic parameters of TL glow peaks are calculated by modeled first-, second-, generalorders of kinetics (GOK) thanking to the computer by using the R package TGCD. The results obtained as comparing the lifetime values of the three samples showed that the values of the 8 kGy irradiated-samples were the lowest whereas the 4 kGy irradiated-samples’value were greater than the non-irradiated samples’ one time.

scholarly journals Glow curve analysis by Gauss-Lorentz function

2013 ◽  
Vol 28 (1) ◽  
pp. 45-51 ◽  
Author(s):  
Zdravko Vejnovic ◽  
Milos Pavlovic ◽  
Marina Kutin ◽  
Milorad Davidovic
Keyword(s):  
Activation Energy ◽  
Kinetic Model ◽  
Kinetic Parameters ◽  
Glow Curve ◽  
Curve Analysis ◽  
Geometric Parameters ◽  
Experimental Curve ◽  
Kinetics Model ◽  
Exponential Factor ◽  
Mixed Order

A new method for fitting glow curves, described in a mixed order kinetics model, with Gauss-Lorentz function is shown. Theoretical expressions of the mixed order kinetics model are shown in a new way, so that the values of kinetic parameters can be obtained through the geometric parameters. When the model is described in this way it is possible to calculate precisely the kinetic parameters such as activation energy, pre-exponential factor and the factor a= n0/(h + n0). At the same time, obtained values of geometric parameters of the experimental curve, which is described with the Gauss-Lorentz function, can be used to estimate the kinetic model, in which thermoluminescence relaxation occurs. This gives a possibility of a new application of Gauss-Lorentz function to be used as a criterion for assessing model of relaxation, when it is not known in advance. The accuracy of fitting is studied, for the specific cases of computer simulated thermoluminescent curves with one peak.

Toxicity and immunogenicity of Crotalus durissus terrificus venom treated with different doses of gamma rays

Toxicon ◽  
1999 ◽  
Vol 37 (8) ◽  
pp. 1131-1141 ◽  
Author(s):  
Patricia Bianca Clissa ◽  
Nanci do Nascimento ◽  
José Roberto Rogero
Keyword(s):  
Gamma Rays ◽  
Crotalus Durissus Terrificus ◽  
Crotalus Durissus ◽  
Different Doses

scholarly journals Genetic Variability Studies in M5 Generations of Determinate Early Maturing Cluster Bean [Cyamopsis tetragonoloba (L.) Taub] (MDU-1) Mutants for Yield and Yield Attributing Characters

2022 ◽  
Author(s):  
Devi Suresh ◽  
M. Ananthan ◽  
C. Vanniarajan ◽  
P. Balasubramanian ◽  
T. Sivakumar ◽  
...  
Keyword(s):  
Gamma Rays ◽  
High Yield ◽  
Cyamopsis Tetragonoloba ◽  
Variability Analysis ◽  
Cluster Bean ◽  
Bean Variety ◽  
Early Maturing ◽  
Per Se ◽  
Mutant Lines ◽  
Different Doses

Background: MDU-1 is a high yielding, indeterminate cluster bean variety. In order to develop determinate mutant with high yield, MDU-1 cluster bean variety was irradiated using gamma rays, electron beam and combination of gamma rays and EMS with different doses and the variability induced in M5 generations were studied. Methods: Twenty one best individual plants from M4 generation were selected based on plant height and higher yield and forwarded to M5 generation where they were evaluated in RBD with three replications. Fourteen non-segregating mutant lines with desirable traits were identified in M5 generation and were evaluated for variability along with the parent MDU1. Result: Five best mutant lines namely ACMC-020-04, ACMC-020-11, ACMC-020-08, ACMC-020-10 and ACMC-020-11 were selected from the 14 accessions based on per se performance and variability analysis. The selected mutants needs to be forwarded for stability testing in different environments.

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.

Comparative study of kinetic parameters induced by different excitation sources: using a novel and user-friendly glow curve deconvolution spreadsheet

2018 ◽  
Vol 29 (18) ◽  
pp. 15732-15740 ◽  
Author(s):  
H. Durán-Muñoz ◽  
M. Hernández-Ortíz ◽  
C. Sifuentes-Gallardo ◽  
J. I. Galván-Tejeda ◽  
R. Sánchez-Zeferino ◽  
...  
Keyword(s):  
Comparative Study ◽  
Kinetic Parameters ◽  
Glow Curve ◽  
User Friendly

An Overview on Peak Shape Method for Thermoluminescence Glow Curve Analysis

2018 ◽  
pp. 26-52
Author(s):  
Sukhamoy Bhattacharyya ◽  
Partha Sarathi Majumdar
Keyword(s):  
Activation Energy ◽  
Glow Curve ◽  
Frequency Factor ◽  
Curve Analysis ◽  
Peak Shape ◽  
Order Of Kinetics ◽  
Symmetry Factor ◽  
Alternative Approach ◽  
General Order ◽  
Thermoluminescence Glow Curve

The shape of a thermoluminescence (TL) glow curve has fundamental importance for calculating the characteristic parameters of trap levels within the band gap. TL analysis are mostly based on the three-parameter general order kinetics model. The parameters are activation energy, order of kinetics, and frequency factor. Peak shape method is one of the most prominent methods for extracting the activation energy from a TL curve. An overview of different peak shape methods along with an alternative approach formulated directly from basic TL equations is presented in this chapter. Generally, peak shape method requires prior knowledge of order of kinetics to determine activation energy which creates a difficulty due to the non-uniqueness of symmetry factor for a particular value of order of kinetics. A modified version of peak shape method which is free from this constraint is discussed here. Activation energies from experimental curves of tremolite and actinolite are estimated using peak shape method. Limitation of peak shape method for saturated TL peaks with heavy retrapping is also discussed.

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