El presente estudio ve la problemática actual sobre el abastecimiento de agua potable y alcantarillado de la localidad de mala, para la cual se hace un análisis del estudio de mercado en donde se puede observar las características de la forma de vida de la población. Evalúa las condiciones actuales de los Sistemas de Abastecimiento para, luego proyectar el diseño complementario. Estudia las fuentes de abastecimiento para luego realizar el análisis de alternativas y determinar cual resulta más económico satisfaciendo la demanda actual del abastecimiento. Luego de los estudios previos, se realiza el diseño final de todos los componentes del Sistema de Abastecimiento de Agua y Alcantarillado de la Ciudad de Mala, incluyendo los periodos óptimos de diseño de cada estructura, los metrados, presupuestos y la fórmula polinómica de los componentes finales. | Tesis

5 páginas, 4 figuras, 2 tablas | The hydrochemical study of the edaphic and weathered profiles of some forest ecosystems of the "Sierra de Gata" mountains, as a part of the study of the total biogeochemical cycles, is carrying on. Some descriptive aspects of the soil water receptacles of diferent kinds (with and without tension), the advantages and disadvantages, and the relation with porosity, microenviroments and theirs solutions are shown. | Peer reviewed

A study about conservation of matrinxã (Brycon sp.) on ice was carried out in insolated boxee divided into eleven lots. The table gives resulte for the subjective evaluation of freshness, based on external and internal characteristics and gill odor. Scores ranged between a maximum of 25 points and 8 points, the latter score applying to fish unsuitable for human consumption. The samples were shown to have similar nutritional composition as other fish, and were classified as a lean species due to the small quantity of fat in the fillet. Results of the chemical quality tests were not consistent, but because data are lacking for the response of free fatty acids with time, this aspect deserves further study, it was concluded that matrinxãremains suitable for consumption for 22 days on ice. | O estudo da conservação do matrinxã (Bryconsp.) em gelo, foi efetuado em caixas isotérmicas em onze lotes. A Tabela de avaliação sensorial utilizada, foi baseada nas características externas, internas e odores das queiras, tendo 25 pontos máximos, e o limite de 08, quando os exemplares se tornavam Impróprios para o consumo humano. Pelas determinações da composição química, as amostras examinadas apresentaram teores semelhantes a outros peixes, sendo classificado como espécie magra de acordo com a quantidade de lipídios no músculo. As determinações químicas de qualidade (AGL; TBA; BVT e TMA), não apresentam consistência; porém os Ácidos Graxos Livres (AGL), merecem estudos mais detalhados. Conclui-se que as matrinxãspodem se manter em gelo durante 22 dias em condições de consumo.

INDISPONÍVEL

La investigacion se realizo en parcelas con suelos de color blanco (Cambisol calcico) y rojo (Luvisol cromico) en las comunidades de San Miguel y Morelos, Jaltepec, en la Mixteca Alta Oaxaquena para identificar las practicas de conservacion del suelo y agua de los productores y senalar los factores socioeconomicos asociados. Actualmente se realizan en proporcion variable practicas de conservacion del suelo y agua sobretodo en aquellas parcelas que fisicamente lo requieren y/o que representan mayores ventajas socioeconomicas. No necesariamente existe mayor realizacion de practicas de conservacion entre mejores sean las condiciones socioeconomicas de los productores. | The research was carried out in former plots with white (Cambisol calcico) and red (Luvisol cromico) soils in comunities at San Miguel and Morelos, Jaltepec, on of the Mixteca Alta Oaxaquena Region with the objective to identify the soil and water conservation practices and socioeconomical factors associated with their realization. At present small farmers carry out some soil and water conservations practices in variable proportion and there is a major realization of them in such lands that physically requiere it and that represent greater socioeconomic advantages. There is not necessarily a major conservation practices with better socioeconomic conditions.

Se utilizo el riego por subirrigacion llamado riego por succion. Para investigar y comparar dos metodos de fertilizacion en fresa: por succion y tradicional. Se estimo indirectamente la evapotranspiracion y el crecimiento del cultivo con mediciones de area foliar inflorescencias, longitud de peciolos, etc. y el sistema radical. Fertilizando a traves del sistema de riego o fertilizando por el metodo convencional y usando el riego por succion, el desarrollo de raices y produccion de frutos por unidad de area fueron mejores. La productividad del agua por unidad de rendimiento de fruto en los tratamientos regados por succion fue 4.5 veces mayor que los tratamientos irrigados en forma tradicional. | It was used a kind of subirrigation method called suction irrigation. For investigate and compare two fertilizing methods in strawberry crop: trough the irrigation system and in the traditional way. Also crop evapotranspiration was estimated indirectly doing a water balance and crop growth making measurements leaf area, inflorescences, petioles length, etc. and root system at different dates after planting. Fertilizing through the irrigation system or fertilizing by the conventional method and using suction irrigation the roots and fruit yield were the best. The water productivity per unit of fruit yield in the treatments with suction irrigation were 4.5 times higher than those traditionally irrigated.