Zobrazeno 1 - 10
of 60
pro vyhledávání: '"Juan A. Ramos-Guivar"'
Autor:
Mayra A. Arias-Contreras, Noemi-Raquel Checca-Huaman, Enrique Arévalo-Gardini, Cesar O. Arévalo-Hernández, Edson C. Passamani, Juan A. Ramos-Guivar
Publikováno v:
Journal of Agriculture and Food Research, Vol 18, Iss , Pp 101295- (2024)
The aim of this research was to show that the absorption of divalent cadmium ions (Cd2+) in Theobroma cacao L. seedlings can be controlled and adjusted by remediation with maghemite (γ-Fe2O3) nanoparticles (NPs), i.e., leading to the low tolerance l
Externí odkaz:
https://doaj.org/article/73fde671d86145a99eee57a6e4c72c46
Publikováno v:
Physics, Vol 6, Iss 1, Pp 75-93 (2024)
The solution of a quantum periodic potential in solid state physics is relevant because one can understand how electrons behave in a corresponding crystal. In this paper, the analytical solution of the energy formulation for a one-dimensional periodi
Externí odkaz:
https://doaj.org/article/5d7437049d1b4cfdbc8b66005ad6a22b
Publikováno v:
International Journal of Molecular Sciences, Vol 25, Iss 14, p 7542 (2024)
Zeolite type 5A combined with the magnetic properties of maghemite nanoparticles facilitate the rapid absorption of heavy metals, which makes them an interesting proposal for the remediation of water contaminated with lead and arsenic. However, the p
Externí odkaz:
https://doaj.org/article/18df8dbdedef4ae4a80e2f7b98021178
Autor:
Juan A. Ramos-Guivar, Renzo Rueda-Vellasmin, Erich V. Manrique-Castillo, F. Mendoza-Villa, Noemi-Raquel Checca-Huaman, Edson C. Passamani
Publikováno v:
Polymers, Vol 16, Iss 11, p 1581 (2024)
Using a modified co-precipitation method, 11(2) nm γ-Fe2O3 nanoparticles functionalized with PSSNa [Poly(sodium 4-styrenesulfonate)] saloplastic polymer were successfully synthesized, and their structural, vibrational, electronic, thermal, colloidal
Externí odkaz:
https://doaj.org/article/f565a8584b4d433ea11b9ca165d78fcc
Publikováno v:
Applied Sciences, Vol 14, Iss 10, p 3987 (2024)
The analytical generalization for N periodic potential wells coupled to a probe rectangular-like potential and a zero potential is extremely important in the study of one-dimensional periodic potentials in solid state physics, e.g., in the calculatio
Externí odkaz:
https://doaj.org/article/e535a9eb6fc64846821dd844c35bcd6b
Publikováno v:
Applied Surface Science Advances, Vol 18, Iss , Pp 100489- (2023)
A novel magnetic composite of zeolite 5A and maghemite nanoparticles has been synthesized at 300 K and its lead removal properties from the Peruvian river Cumbaza were systematically studied. Its kinetic adsorption properties were investigated, and a
Externí odkaz:
https://doaj.org/article/be6d7268542e404493ced77896b5c1a7
Autor:
Juan A. Ramos-Guivar, Yacu V. Alca-Ramos, Erich V. Manrique-Castillo, F. Mendoza-Villa, Noemi-Raquel Checca-Huaman, Renzo Rueda-Vellasmin, Edson C. Passamani
Publikováno v:
Nanomaterials, Vol 14, Iss 9, p 785 (2024)
A novel magnetic composite made of Peruvian pyroclastic dust material decorated with maghemite nanoparticles was synthesized and characterized using a variety of analytic techniques. The 13 nm maghemite nanoparticles were grown on the pyroclastic dus
Externí odkaz:
https://doaj.org/article/e2fa116f44b24717afa6564b80885277
Autor:
F. Mendoza-Villa, Noemi-Raquel Checca-Huaman, Tainara L. G. Costa, Jair C. C. Freitas, Juan A. Ramos-Guivar
Publikováno v:
Toxics, Vol 12, Iss 4, p 252 (2024)
In this work, the synthesis and structural, thermal, vibrational, morphological, and electronic characterization of 2D-like pure graphene oxide (GO) and phosphorus-containing graphene oxide (GOP) sheets were investigated. The average thicknesses of G
Externí odkaz:
https://doaj.org/article/985466fb439c4e1cbe7c6c82090b65fc
Publikováno v:
Revista de Investigación de Física, Vol 25, Iss 2 (2022)
The purpose of this research is to have a quantitative analysis on the temperature dependence magnetization of ferromagnetic nanoparticles (NPs), i.e., the Curie temperature (Tc), was systematically studied. The atomistic simulations were carried out
Externí odkaz:
https://doaj.org/article/db5a858c47444da99093aa4cfc3bdd44
Autor:
Miguel A. Vasquez-Caballero, Yamerson Canchanya-Huaman, Angie F. Mayta-Armas, Jemina Pomalaya-Velasco, Noemi-Raquel Checca-Huaman, Yéssica Bendezú-Roca, Juan A. Ramos-Guivar
Publikováno v:
Molecules, Vol 28, Iss 12, p 4596 (2023)
The adsorption characteristics of titanium dioxide nanoparticles (nano-TiO2) for the removal of Pb(II) from irrigation water were investigated in this work. To accomplish this, several adsorption factors, such as contact time and pH, were tested to a
Externí odkaz:
https://doaj.org/article/0eafe3dab3504e83890c8c6891d03888