• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 1
  • 1
  • Tagged with
  • 2
  • 2
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Hodnocení zatížení sedimentů drobných vodních toků fosforem / Assessment of load of small watercourses sediments with phosphorus

Pavlíková, Marcela January 2016 (has links)
The issue of phosphorus in sediments of small watercourses and phosphorus forms are often out of interest, unlike phosphorus and its forms in sediments of water reservoirs. The thesis is focused on the development and evaluation of methods for the determination of total phosphorus by modifying commonly used methods and evaluation of methods for the determination of selected forms of phosphorus in small watercourses sediments. Over 1,152 analyses of sediment samples collected in four seasons and four locations and in three paralell determinations were done. The total phosphorus in the sediments was assessed by four methods, further 7 other forms of phosphorus were evaluated by one to three methods, according to different forms of phosphorus. The data file was subjected to statistical analysis. The aim of statistical analysis was to evaluate phosphorus concentrations, depending on the used method. Additional aim of statistical analysis was to observe dependencies of phosphorus concentrations on metals and identify the impact of periods and locations on the concentration of phosphorus.
2

Aplicaciones de interés medioambiental, clínico e industrial del análisis por inyección en flujo multiconmutado

Manera Fuente, Matias 30 November 2007 (has links)
El creciente número de controles analíticos requeridos en áreas como la sanitaria, el medio ambiente o la alimentación conlleva la necesaria automatización de los procesos analíticos.De acuerdo con ello, en esta tesis se han desarrollado, implementado y puesto a punto nuevos métodos automáticos de análisis robustos y económicos para la determinación de analitos de interés medioambiental, clínico e industrial. La automatización de las metodologías, empleando las técnicas de flujo MSFIA y MPFS, simplifican de forma considerable el procesamiento analítico con un importante ahorro de reactivos y tiempo, y permiten una mayor frecuencia de análisis, con la consecuente reducción del coste por análisis y en la generación de residuos. Los métodos propuestos son selectivos, reproducibles, precisos, robustos y en casi su totalidad son ejecutados sin la intervención del analista. / O crescente número de controlos analíticos requeridos em diversas áreas como o médio ambiente, a indústria sanitária ou a alimentar, conduziu à necessidade de automatização dos processos analíticos.Indo de encontro a estes requisitos, nesta tese desenvolveu-se, implementou-se e colocou-se em prática novos métodos de análise automáticos robustos e económicos para a determinação de analitos com interesse ambiental, clínico e industrial. A automatização das metodologias aplicando as técnicas de fluxo MSFIA e MPFS, simplificam de forma considerável o procedimento analítico com um decréscimo importante de reagentes gastos e tempo de análise, permitindo uma maior frequência de análise, com consequente redução do custo de análise e de geração de resíduos. Os métodos propostos são selectivos, reprodutíveis, precisos e robustos.

Page generated in 0.1301 seconds