Le taux de change effectif reel et le regime des echanges: leur role dans le developpement economique.

Rapport de recherche

Efecto del aire a una temperatura de 44 - 46C en la fisiología nasal determinada por rinomanometría, función mucociliar y citología nasal

Tesis [Doctorado en Medicina] UANL

Influencias del estres a baja temperatura y ph acido en clostridium perfringens tipo A

Tesis (Doctorado en Ciencias con Especialidad en Microbiología) UANL

Estudio sobre algunos eventos metabólicos relacionados con la producción de enterotoxina y la esporulación de clostridium perfringens tipo A, a su temperatura óptima de crecimiento

Tesis (Doctorado en Ciencias, con Especialidad en Microbiología Médica) UANL

Alteraciones orgánicas en un esfuerzo físico máximo a diferentes grados de temperatura 0oC, 26oC y 40oC

Tesis (Doctorado en Medicina) UANL

Simulación de la temperatura en estado estable-dinámico para un rodillo de trabajo de un molino contínuo de laminación en caliente

Tesis (Doctor en Ing. de Materiales) U.A.N.L.

Obtención de la espinela aluminato de magnesio sinterizada a baja temperatura por Ana María Arato Tovar

Tesis (Doctor en Ingeniería de Materiales) U.A.N.L.

Crecimiento y desarrollo del cilantro Coriandrum sativum L. por efecto del fotoperíodo y la temperatura y su control con fitoreguladores

[Tesis] (Doctor en Ciencias Agrícolas) U.A.N.L.

Flujo génico, comportamiento defensivo y efecto de la temperatura en colonias de Apis mellífera infestadas con Varroa destructor

Tesis ( Doctor en Manejo de Recursos Naturales) U.A.N.L.

Oxidación a alta temperatura y bajo diferentes ambientes de una superaleación base níquel.

Tesis (Doctor en Ingeniería de Materiales) UANL, 2014.

Studies on the Effect of High Energy Ball Milling On the Structural, Electrical and Magnetic Properties of Some Normal Spinets in the Ultrafine Regime

The present work is an attempt to understand the characteristics of high energy ball milling on the structural, electrical and magnetic properties of some normal spinets in the ultra fine regime, Magnetism and magnetic materials have been a fascinating subject for the mankind ever since the discovery of lodestone. Since then, man has been applying this principle of magnetism to build devices for various applications. Magnetism can be classified broadly into five categories. They are diamagnetic, paramagnetic, ferromagnetic antiferromagnetic and ferrimagnetic. Of these, ferro and ferri magnetic materials assume great commercial importance due to their unique properties like appropriate magnetic characteristics, high resistivity and low eddy current losses. The emergence of nanoscience and nanotechnology during the last decade had its impact in the field of magnetism and magnetic materials too. Now, it is common knowledge that materials synthesized in the nanoregime exhibit novel and superlative properties with respect to their coarser sized counterparts in the micron regime. These studies reveal that dielectric properties can be varied appreciably by high-energy ball milling in nanosized zinc ferrites produced by coprecipitation method. A semi conducting behaviour was observed in these materials with the Oxygen vacancies acting as the main charge carrier for conduction, which was produced at the time of coprecipitation and milling. Thus through this study, it was possible to successfully investigate the finite size effects on the structural, electrical and magnetic properties of normal spinels in the ultra fine regime

Visible luminescence mechanism in nano ZnO under weak confinement regime

We describe the structure of luminescence spectrum in the visible region in nano-ZnO in colloidal and thin film forms under weak confinement regime by modeling the transition from excited state energy levels of excitons to their ground state. Measurements on nanocrystallites indicate the presence of luminescence due to excitonic emissions when excited with 255 nm. The relevant energy levels showing the transitions corresponding to the observed peaks in the emission spectrum of ZnO of particle size 18 nm are identified.