During the past years the use of plastic grocery bags at stores has been controversial. Plastic grocery bags are handy and durable, but after the bread and milk are put away, most of the bags wind up in landfills. The plastic bags represent a threat to the environment because these are not degradable. Recently in…
La actividad física controlada y planificada (deporte), nos reporta muchos y grandes beneficios. Pero para obtenerlos tenemos que ser constantes en su práctica. Lo mínimo recomendado Un mínimo de tres horas semanales. Un mínimo de cuarenta minutos por sesión. Alrededor del 95% de ejercicio aeróbico ligero y medio. Alrededor del 5% de ejercicios de intensidad…
X-ray photoelectron spectroscopy (XPS) is an analytical technique that studies the surface of structures, based upon the photoelectric effect. Each atom in the surface has core electron with the characteristic binding energy that is theoretically equal to the ionization energy of that electron. When an X-ray beam directs to the sample surface, the energy of…
Los rayos X se han utilizado durante décadas para estudiar la estructura de los materiales cristalinos. Sin embargo, en las técnicas de los últimos años se han ideado que, en combinación con la disponibilidad de intensos haces colimados de fuentes de radiación, han transformado los rayos X en una versátil y potente herramienta para el…
Effect of Sequence and Structural Properties on 14-Helical ?-Peptide Activity against Candida albicans Planktonic Cells and Biofilms Abstract ?-Peptides (? -amino acid oligomers) that mimic the amphiphilic, helical, and cationic properties of natural antimicrobial peptides have previously been shown to display antifungal activity against planktonic Candida albicans cells. ?-Peptides offer several advantages over conventional peptides…
Last week I had the opportunity of participate on the conference “The 7 secrets of highly successful PhD students” given by Hugh Kearns. He works at Flinders University in Australia performing psychological and educational research to develop workshops and materials to help doctors, academics and PhD students to be more effective in their daily life.…
Recently we have heard about the oil spill that occurs in the Gulf of Mexico. Approximately 4 million gallons of crude have been spilled in the gulf coast. But what new methods have being using to clean the ocean surface. Scientists are tasked with creating new ways to help clean up future oil spills. Like…
Hydroxypropyl methylcellulose (HPMC) is a biodegradable polymer which has been used as an ophthalmic lubricant and controlled-delivery component in oral medicaments. Biodegradable polymers are recommended to form films in which an active pharmaceutical ingredient (API) is suspended, since it gels when the temperature is increased. In this work, the effect of concentration and type of…
Es un hecho que a lo largo de los años algunas palabras, personajes y eventos permanecen inmortales en nuestras memorias y trascienden en nuestras vidas, haciéndonos partícipes de un mundo que busca aprender del pasado, vivir el presente y mejorar para proyectarse en el futuro. Como seres humanos buscamos mejorar nuestras vidas, hacer un mundo…
Nanotechnology offers, for the first time, tools to develop new industries based on cost-effective and cost-efficient economies, thus seriously contributing to sustainable economic growth. The areas where nanotechnologies work for sustainable electricity storage basically are rechargeable batteries and supercapacitors [1]. 1. Nanoparticles for lithium-ion (Li-ion) rechargeable batteries Li-ion batteries exhibit the merit of long cycle…