scholarly journals Energy Absorption and Exposure Buildup Factors of Essential Amino Acids

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Ertuğrul Bursalıoğlu ◽  
Begüm Balkan ◽  
H. Birtan Kavanoz ◽  
Mustafa Okutan ◽  
Orhan İçelli ◽  
...  
Keyword(s):  
Amino Acids ◽  
Energy Range ◽  
Energy Absorption ◽  
Atomic Number ◽  
Effective Atomic Number ◽  
Essential Amino Acids ◽  
Effective Electron ◽  
Significant Interest ◽  
Effective Atomic Numbers ◽  
Buildup Factors

The effective atomic number and effective electron density in amino acids are of significant interest due to their use in various applications. The energy absorption buildup factors, exposure buildup factors, effective atomic numbers, and electron densities of essential amino acids such as Leucine (C6H13NO2), Lysine (C6H14N2O2), Methionine (C5H11NO2S), Phenylalanine (C9H11NO2), Threonine (C4H9NO3), Tryptophan (C11H12N2O2), Valine (C5H11NO2), Arginine (C6H14N4O2), and Histidine (C6H9N3O2) were determined theoretically in the energy range 0.015–15 MeV.

scholarly journals Photon attenuation parameters of non-essential amino acids using EPICS2017 library interpolations

2021 ◽  
Vol 3 (5) ◽  
Author(s):  
A. M. V. Javier-Hila ◽  
B. C. V. Javier ◽  
F. C. Hila ◽  
N. R. D. Guillermo
Keyword(s):  
Amino Acids ◽  
Monte Carlo ◽  
Essential Amino Acids ◽  
Electron Densities ◽  
Attenuation Coefficients ◽  
Photon Attenuation ◽  
Mass Attenuation Coefficients ◽  
Effective Atomic Numbers ◽  
Buildup Factors ◽  
Mass Attenuation

AbstractMass attenuation coefficients, effective atomic numbers, electron densities and energy absorption and exposure buildup factors for the non-essential and conditionally non-essential amino acids including alanine, arginine, asparagine, aspartic acid, cysteine, glutamic acid, glutamine, glycine, proline, serine, and tyrosine have been acquired using the latest evaluated photoatomic library of EPICS2017. The library was used by constructing an interpolation script that calculates for all photon attenuation parameters. Comparisons were made using alternative Monte Carlo simulation results for 15 energy points from 59.5 to 1333 keV, and in contrast with experimental works in literature. Good agreements for the mass attenuation coefficients were observed between EPICS2017-based values compared with Monte Carlo code and experimental results. Similar trends for the effective atomic numbers and electron densities were observed from EPICS2017 interpolation and from results found in literature. Conversely, buildup factors acquired by Geometric-Progression fitting parameters were reported in this work preliminarily for most of these biomolecules at different penetration depths. Overall, cysteine showed the most significant deviation among the other non-essential amino acids due to the presence of sulfur in its molecular structure.

A Study of Photon Interaction and Photon Energy Absorption Effective Atomic Numbers for Some Amino Acids

2010 ◽  
Vol 165 (2) ◽  
pp. 240-244 ◽  
Author(s):  
Tejbir Singh ◽  
Updesh Kaur ◽  
Shivali Tandon ◽  
Parjit S. Singh
Keyword(s):  
Amino Acids ◽  
Energy Absorption ◽  
Photon Energy ◽  
Photon Interaction ◽  
Effective Atomic Numbers

Determination of effective atomic numbers and electron densities for some synthesized triazoles from the measured total mass attenuation coefficients at different energies

2019 ◽  
Vol 97 (1) ◽  
pp. 86-92 ◽  
Author(s):  
F. Akman ◽  
I.H. Geçibesler ◽  
I. Demirkol ◽  
A. Çetin
Keyword(s):  
Total Mass ◽  
Effective Atomic Number ◽  
Electron Densities ◽  
Atom Number ◽  
Attenuation Coefficients ◽  
Effective Electron ◽  
Mass Attenuation Coefficients ◽  
Effective Atomic Numbers ◽  
Theoretical Results ◽  
Mass Attenuation

The effective atomic numbers and electron densities of some synthesized triazoles were determined using the experimental values of total mass attenuation coefficients at 13.93, 17.77, 26.34, and 59.54 keV photon energies. The measurements were performed in a transmission geometry that consists of a Si(Li) detector, an 241Am point source and a target. The measured results were compared with two different theoretical results. The measured results are generally consistent with the theoretical results. It is observed that the measured parameters depend on the photon energy, weighted contributions of the individual atoms within the triazoles, atom number in the triazoles, and chemical composition of triazoles. Also, the effective electron density increases linearly with increasing effective atomic number.

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