Ideas sobre una guía metodológica básica para la redacción de los anejos de Geología y Geotecnia de los TFT de las titulaciones de ingeniería civil.

Los Trabajos Fin de Título (TFT) de las titulaciones de ingeniería civil, en su modalidad de “trabajos de carácter profesional directamente relacionados con los estudios cursados”, deben incluir anejos específicos de Geología y Geotecnia, cuya elaboración resulta en ocasiones compleja para los estudiantes: 1º) por el tiempo transcurrido entre los primeros cursos, cuando se imparten estas materias, y el final de los estudios; y 2º) por la necesidad de equipos especiales para el reconocimiento del terreno, que exceden sus posibilidades económicas. A modo de directrices orientadoras para tutores y estudiantes, se han considerado cuatro tareas básicas que permitan elaborar y redactar estos anejos, de forma razonada y ordenada. Además, se propone un índice-guía que consta de ocho apartados. Por último, se pretende hacer partícipes a profesores y alumnos de ingeniería civil de estas ideas, de manera que con sucesivas mejoras, pueda constituir una guía metodológic

Evaluation of polyherbal methionine and choline in feedlot rations for lambs

Requirements of lambs for choline and methionine have not been clearly established, but because of their metabolic relationship, the availability of these two nutrients may affect protein synthesis and energy balance. Therefore, a trial was carried out to evaluate the effect on productive performance and blood metabolites of including methionine and choline from polyherbal mixtures in finishing lamb diets. Forty Hampshire x Suffolk lambs weighing 26.9 ± 2.8 kg were used for a 45-day experiment. The treatments were arranged as a 2x2 factorial, in which the factors were dietary supplementation with herbal methionine and choline at two levels (0% and 0.4% of dry matter (DM)). The treatments had no effects on the lambs’ productive variables (daily feed intake, average daily gain, and feed to gain ratio), carcass characteristics and lipid metabolites (P >0.05). The results indicated that the inclusion of polyherbal mixtures containing methionine, choline and their combination at 0.4% of DM in finishing lamb diets showed no benefits in productive response or in blood metabolites related to lipid metabolism. Keywords: amino acid, lipid metabolites, productive performance, ruminally protected, vitami

Thermodynamics of Dipolar Chain Systems

The thermodynamics of a quantum system of layers containing perpendicularly oriented dipolar molecules is studied within an oscillator approximation for both bosonic and fermionic species. The system is assumed to be built from chains with one molecule in each layer. We consider the effects of the intralayer repulsion and quantum statistical requirements in systems with more than one chain. Specifically, we consider the case of two chains and solve the problem analytically within the harmonic Hamiltonian approach which is accurate for large dipole moments. The case of three chains is calculated numerically. Our findings indicate that thermodynamic observables, such as the heat capacity, can be used to probe the signatures of the intralayer interaction between chains. This should be relevant for near future experiments on polar molecules with strong dipole moments.Comment: 15 pages, 5 figures, final versio