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Now showing items 11-20 of 173
Room temperature gas-solid reaction of titanium on glass surfaces forming a very low resistivity layer
(2016-09)
Titanium films were deposited on quartz, glass, polyamide and PET substrates in a high vacuum system at room temperature and their electrical resistance monitored in vacuo as a function of thickness. These measurements ...
Estudio de la biocompatibilidad de hidroxiapatita y su posible aplicación como vehículo para sustancias bioactivas
(2014-12)
Las nanopartículas sintéticas se utilizan en aplicaciones médicas para el diagnóstico, la
prevención y el tratamiento de las enfermedades. Algunos de los usos más destacados de estos
biomateriales, a través de la ...
Synthesis of 2-hydroxy-3-substituted naphthoquinones using the Heck reaction
(2007-06)
An efficient Heck coupling of 2-hydroxy-3-iodo-naphthoquinone with a series of electron-deficient alkenes in aqueous solution has been accomplished. The method is characterized by simple conditions and facile work-up to ...
Reactivity and structure of derivatives of 2-hydroxy-1,4-naphthoquinone (lawsone)
(2007-11)
The structures of two derivatives of 2-hydroxy-1,4-naphthoquinone (lawsone) are examined using the density functional theory (DFT) hybrid functional B3LYP. Using the optimized structure of lawsone acetate, the reactivity ...
Evaluación de la capacidad del cemento Portland dopado con nanopartículas de TIO2 para la disminución de Pseudomonas aeruginosa y Escherichia coli en agua
(2022-10)
El abastecimiento de agua potable no es equitativo para la población mundial y este problema empeora debido al crecimiento poblacional, a la contaminación, al calentamiento global y a un inadecuado tratamiento de potabilización. ...
The role of chloramine species in NDMA formation
(2018-09)
N-nitrosodimethylamine (NDMA), a probable human carcinogen disinfection by-product, has been
detected in chloraminated drinking water systems. Understanding its formation over time is important
to control NDMA levels in ...
Desarrollo de una línea de acabados para madera a base de poliuretanos
(2022)
El proyecto se base en el desarrollo de cinco pilares para el desarrollo de una línea completa de acabados para madera a base de poliuretanos, toma en cuenta la investigación de mercado, desarrollo técnico, inscripicón ...
Identification of polyphenols from antiviral Chamaecrista nictitans extract using high-resolution LC–ESI–MS/MS
(2014)
Chamaecrista nictitans (L) extract possesses antiviral properties; it acts against the herpes simplex virus, and this may be attributed to its constituent phenolics. Here, high-resolution LC–ESI–MS/MS is used to identify ...
From Ideality to Simplicity: A Robust and Affordable Hydrogen Reference Electrode
(2020-02-01)
In electrochemistry, the concept of a reference electrode is fundamental. Introductory courses might mention the standard hydrogen electrode (SHE), its working principle, and its theoretical design; however, chances are ...