As a result of soil weathering, clays, and iron and aluminum oxides are obtained, which define the soil characteristics. Therefore, it is important to characterize these materials as they accurately reflect the long-term effects of the chemical environment and soil drainage mechanisms. Moreover, they influence many soil properties, especially considering that soils are directly affected by harmful environments such as mining areas. This study presents advancements in the characterization of two horizons within the soil profile of an area called Marmotilla, adjacent to La Florcita Mine, located in the province of Sánchez Carrión, La Libertad Region. The sample extraction point has coordinates Latitude: -7.821713° and Longitude: -78.012394°. The samples were taken from the surface and at 50 cm depth. Mineralogical characterization utilized X-ray diffraction and Mössbauer spectroscopy ...

Thin films of molybdenum nitride were deposited on silicon wafers (111) by means of the DC reactive magnetic sputtering technique, at the substrate temperature of 100, 200, 300 and 400 °C, in the gas mixture (Ar+N2 ) at the working pressure of 4,3x-3 torr. The composition of the films has been defined with Auger Electron Spectroscopy (AES). X-ray diffraction shows that such films have a preferential crystallographic orientation along the plane (112) and the grain size increases from 8,21 to 13,16 nm in the range of 100 to 400 °C the substrate temperature. The resistivity of the films decreases with increasing substrate temperature from 74,20 to 2,45 μΩ.cm showing ohmic characteristics. The lowest value of the electrical resistivity was 2,45 μΩ.cm at the substrate temperature of 400 °C.

Las fibras de Vicugna pacos "alpaca” se han utilizado por los pobladores del Ande peruano desde tiempos inmemoriales como materiaprima para la industria textil. Sin embargo, en el mundo globalizado, necesita un valor agregado que le permita competir con otras materiasprimas como algodón, seda, lana, entre otras. La nanotecnología permite cambiar las propiedades de los materiales mediante laincorporación de nanopartículas a su superficie, proceso conocido como funcionalización. Nuestro objetivo investigativo determinó elefecto antimicrobiano de fibras de alpaca funcionalizadas con nanopartículas de plata (AgNPs) sintetizadas por vía química, con diferentesconcentraciones de citrato trisódico. Utilizando la metodología AATCC 100 modificada, evaluamos dicho efecto sobre las cepas bacterianasde Escherichia coli y Staphylococcus aureus expuestas a fibras café oscuro brillante. L...

This research was funded by CONCYTEC-FONDECYT, process E041-01 (grant number 123-2018-FONDECYT-BM-IADT/AV), CNPq-Brazil, grant number 305250/2019-1, and CANON MINERO-UNT (P.I.I.01-2013).