Behavior of Poly-A onto Kaolin

 

• María Guadalupe Torres-Duque
  Faculty of Higher Education Iztacala, National Autonomous University of Mexico. Avenida de los Barrios Number 1, Colonia Los Reyes Iztacala, Tlalnepantla, State of Mexico
• Claudia Camargo-Raya
  Institute of Nuclear Sciences, National Autonomous University of Mexico. Circuito Exterior s/n, Ciudad Universitaria, Coyoacán, Mexico City
• Alicia Negrón-Mendoza
  Institute of Nuclear Sciences, National Autonomous University of Mexico. Circuito Exterior s/n, Ciudad Universitaria, Coyoacán, Mexico City
• Sergio Ramos-Bernal
  Institute of Nuclear Sciences, National Autonomous University of Mexico. Circuito Exterior s/n, Ciudad Universitaria, Coyoacán, Mexico City

DOI: https://doi.org/10.15415/jnp.2020.72017

Keywords: Poly-A, Clays, Kaolin, Chemical evolution

Abstract

A combination of geochemical variables is necessary to explain the origin of life on Earth. Thus, in this work the sorption of Poly-A on a clay mineral (kaolinite) was studied to get an insight about the sorption capacity at different times and pH values, as well as to confirm the capabilities of the clay to protect the sorbate from an external source of ionizing radiation. Poly-A presented a high percentage of sorption in the clay, especially in acidic environments, and this percentage sharply decrease in alkaline media. On the other hand, Poly-A’s recovery was higher in the system with clay, confirming its protection role.

 

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Issue

Vol 7 No 2 (2020): Special Issue 

 

 

How to Cite

María Guadalupe Torres-Duque; Claudia Camargo-Raya; Alicia Negrón-Mendoza; Sergio Ramos-Bernal. Behavior of Poly-A onto Kaolin. J. Nucl. Phy. Mat. Sci. Rad. A. 2020, 7, 139-143.

 

A Data Mining Perspective of XRF Elemental Analysis from Pueblo People’s Pottery

 

• M. Castro-Colin
  Bruker AXS GmbH, Karlsruhe-76131, Germany
• E. Ramirez-Homs
  Department of Physics, El Paso, TX-79912, USA
• J. A. López
  Department of Physics, El Paso, TX-79912, USA

DOI: https://doi.org/10.15415/jnp.2020.72016

Keywords: X-ray fluorescence, Radiation, Spectrometry, Cluster Analysis, Data Mining, Archaeology, Provenance, Nondestructive testing analysis

Abstract

Hierarchichal clustering was used to identify elemental signatures in artifacts attributed to the Pueblo peoples. The artifacts in this study are pottery samples found at different sites in the state of New Mexico, USA. Three methods were applied: complete, average, and Ward. Their corresponding cophenetic correlation coefficients were used to contrast the three methods. Elemental characterization was only based on X-ray fluorescence excitation from a portable spectrometer with silver anode. The elemental correlations here disclosed by data mining techniques are expected to guide further archaelogical studies and assist experts in the assessment of provenance and historical ethnographic studies.

 

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Issue

Vol 7 No 2 (2020): Special Issue

 

How to Cite

M. Castro-Colin; E. Ramirez-Homs; J. A. López. A Data Mining Perspective of XRF Elemental Analysis from Pueblo People’s Pottery. J. Nucl. Phy. Mat. Sci. Rad. A. 2020, 7, 129-138.

Radiation Induced Reactions of Succinic Acid in Aqueous Solution: An Agent-Based Model

 

• Ana Leonor Rivera
  Institute of Nuclear Sciences, National Autonomous University of Mexico, Coyoacan-04510, CDMX, Mexico; Center for Complexity Sciences, National Autonomous University of Mexico
• Sergio Ramos-Beltran
  Institute of Nuclear Sciences, National Autonomous University of Mexico, Coyoacan-04510, CDMX, Mexico
• Alicia Negrón-Mendoza
  Institute of Nuclear Sciences, National Autonomous University of Mexico, Coyoacan-04510, CDMX, Mexico

DOI: https://doi.org/10.15415/jnp.2020.72014

Keywords: Radiation induced chemical reactions, Succinic Acid, Kinetics of reactions, Agent-based model

Abstract

An approach to studying the formation of critical bio-organic compounds in the early Earth is to simulate in the laboratory possible processes that may occur in primitive scenarios. In this context, it can be studied the evolution of succinic acid in an aqueous media exposed to gamma radiation, as starting material produced more complex prebiotic molecules. To describe the products generated by the interaction of the different elements under radiation, there is a mathematical model that considers chemical reactions as nonlinear ordinary differential equations based on the mass balance of all the species, that has been implemented here by an agent-based model. In this simulation, each chemical species involved is considered as an agent that can interact with other species with known reaction rates, and the radiation is taken as a factor that promotes product formation. The results from the agentbased model are compared with the molar concentrations of succinic acid, and its products obtained in the lab. Simulation shows the exponential decomposition of succinic acid due to gamma radiation at room temperature in agreement with the laboratory model.

 

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Issue

Vol 7 No 2 (2020): Special Issue 

 

 

How to Cite

Ana Leonor Rivera; Sergio Ramos-Beltran; Alicia Negrón-Mendoza. Radiation Induced Reactions of Succinic Acid in Aqueous Solution: An Agent-Based Model. J. Nucl. Phy. Mat. Sci. Rad. A. 2020, 7, 117-121.

 

PADC-NTM Applied in 7Li+Pb at 31 MeV Reaction Products Study

 

• M. Cinausero
  National Laboratories of Legnaro, I-35020 Legnaro (Pd), Italy
• A. M. Sajo-Castelli
  Nuclear Physics Laboratory, Simón Bolívar University, Caracas 1080A, Venezuela
• L. Sajo-Bohus
  Nuclear Physics Laboratory, Simón Bolívar University, Caracas 1080A, Venezuela
• J. Palfalvi
  HAS KFKI Atomic Energy Research Institute POB 49, H-1525 Budapest, Hungary
• G. Espinosa
  Institute of Physics, National Autonomous University of Mexico, Coyoacán, México City

DOI: https://doi.org/10.15415/jnp.2020.72013

Keywords: Nuclear tracks, PADC, 7Li Pb reaction products identification, 8pLP, Track spectrum unfolding

Abstract

Passive nuclear track methodology (NTM) is applied to study charged particles products of the reaction ⁷Li+Pb at ~ 31 MeV. It is a contribution to the 8pLP Project (LNL-INFN-Italy) in where we show an alternative approach to register charged particle from reaction fragments by PADC detection. The main advantage is that the passive system integrates data over the whole experiment and has its importance for low rate reaction processes. Reaction products as well as scattered beam particles are determined from track shape analysis. Some limitations are inherent to NTM since a priori knowledge is required to correlate track size distribution given by each type of particle emerging from the target. Results show that the passive technique gives useful information when applied in reaction data interpretation for a relatively large range of particle types.

 

References

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M. Barbui, D. Fabris, S. Moretto, G. Nebbia, P. Nemeth, J.K. Palfalvi, S. Pesente, G. Prete, L. Sajo-Bohus and G. Viesti, Radiation Measurements 44, 857 (2009). https://doi.org/10.1016/j.radmeas.2009.10.048

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Issue

Vol 7 No 2 (2020): Special Issue

 

How to Cite

M. Cinausero; A. M. Sajo-Castelli; L. Sajo-Bohus; J. Palfalvi; G. Espinosa. PADC-NTM Applied in 7Li+Pb at 31 MeV Reaction Products Study. J. Nucl. Phy. Mat. Sci. Rad. A. 2020, 7, 109-115.

 

Effects of Gamma Irradiation on Curcumin Effects of Gamma Irradiation on Curcumin

 

• E. Islas-Ortiz
  Faculty of Chemistry, National Autonomous University of Mexico, UNAM; Master’s and Doctoral Program in Chemical Sciences, UNAM University Cd., México-04510, D. F. México
• E. O. Reyes-Salas
  Faculty of Chemistry, National Autonomous University of Mexico, UNAM
• A. Negrón-Mendoza
  Institute of Nuclear Sciences, National Autonomous University of Mexico, UNAM
• A. L. Meléndez-López
  Institute of Geology, National Autonomous University of Mexico, UNAM
• G. Reyes-García
  Faculty of Chemistry, National Autonomous University of Mexico, UNAM; Master’s and Doctoral Program in Chemical Sciences, UNAM University Cd., México-04510, D. F. México
• J. A. Cruz- Castañeda
  Institute of Nuclear Sciences, National Autonomous University of Mexico, UNAM
• E. Madrigal-Lagunas
  Faculty of Chemistry, National Autonomous University of Mexico, UNAM

DOI: https://doi.org/10.15415/jnp.2020.72012

Keywords: Electrochemical, Curcumin, Gamma Irradiation

Abstract

In this study, remnants concentrations of curcumin in Curcuma longa (organic turmeric powder) were determined after it was exposed to irradiation doses of 1, 2 and 3 kGy. Curcumin analysis was performed using the analyte-sensitive impulse differential polarography technique (LOD: 0.621 ppm and LOQ: 2.130 ppm). The results obtained showed a decreasing concentration of curcumin as a function of the irradiation dose. This reduction is low in terms of affecting the product’s quality with respect to its concentration.

 

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G. Reyes-Garcia, Q. thesis, UNAM, 2019. 

 

Issue

Vol 7 No 2 (2020): Special Issue 

 

 

How to Cite

E. Islas-Ortiz; E. O. Reyes-Salas; A. Negrón-Mendoza; A. L. Meléndez-López; G. Reyes-García; J. A. Cruz- Castañeda; E. Madrigal-Lagunas. Effects of Gamma Irradiation on Curcumin. J. Nucl. Phy. Mat. Sci. Rad. A. 2020, 7, 103-107.