Sökning: "SAMPLES"

Visar resultat 1 - 5 av 5194 avhandlingar innehållade ordet SAMPLES.

1. 1. Two Topics in Survey Methodology : Inference from Nonprobability Samples Using the Double Samples Setup

   Författare :Boris Lorenc; Daniel Thorburn; Lars Lyberg; Gösta Forsman; Stockholms universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; response process; establishment surveys; socially distributed cognition; response burden; measurement error; nonprobability samples; web surveys; double samples; propensity scores; model-based estimation; imputation; nonparametric imputation; weighting; Surveying; Lantmäteri;

   Sammanfattning : Modelling the response process in establishment surveys proceeded thus far by adding steps of operational character to the core cognitive steps of the individual cognitive model. Here (Paper 1) a larger unit of the cognitive analysis is posited: that part of the enterprise that is engaged in responding to a survey, consisting of one or more employees, the tools they use and the established practices of record keeping and survey responding. LÄS MER

3. 2. Inductively Coupled Plasma Atomic Emission Spectrometry : Exploring the Limits of Different Sample Preparation Strategies

   Författare :Barbro Kollander; Jean Pettersson; Marit Andersson; Jonas Bergquist; Grethe Wibetoe; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; multi element analysis; trace element; ICP-AES; inductively coupled plasma atomic emission spectromtery; water analysis; liver analysis; non digested samples; medical samples; biological samples; samples from biopsies and autopsies; mice organ; fast analysis; internal standard; preconcentration; matrix elimination; Cu; Zn; Mn; Co; Pb; Cd; Mg; Ca; Fe; Ni; Cr; S; P; K; Al; Analytical chemistry; Analytisk kemi; Analytical Chemistry; Analytisk kemi;

   Sammanfattning : This thesis describes two different sample preparation strategies for inductively coupled plasma atomic emission spectrometry (ICP-AES), and their ability regarding multi element quantification in complex samples. Sensitivity, repeatability, reproducibility and accuracy were investigated. LÄS MER

4. 3. Application of Mitochondrial DNA Analysis in Contemporary and Historical Samples

   Författare :Maria Lembring; Marie Allen; Niels Morling; Uppsala universitet; []
   Nyckelord :Forensic genetics; Mitochondrial DNA; HVI HVII; Population database; Haplotype; Haplogroup; Ancient DNA; Historical DNA samples; skeletal remains; Vasa museum; Medieval samples; Copernicus; Göring; Genetik; Genetics;

   Sammanfattning : The mitochondrion is a tiny organelle that is the power supplier of the cell and vital to the functioning of the body organs. Additionally it contains a small circular genome of about 16 kb, present in many copies which makes the mitochondrial DNA more viable than nuclear DNA. LÄS MER

5. 4. Analytical Supercritical Fluid Extraction of Lipid Containing Samples

   Författare :Mattias Järemo; Centrum för analys och syntes; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; SFC; extraction cell; liquid samples; fat retainers; lipids; SFE; carbon dioxide; Analytical chemistry; Analytisk kemi;

   Sammanfattning : Traditionally, sample work-up has been associated with different kinds of liquid extraction techniques involving a large consumption of hazardous solvents. There are today regulations that aims at replacement of dangerous chemicals which has created a need for new extraction techniques. LÄS MER

7. 5. Usefulness of archival biobank samples for genetic epidemiologic studies

   Författare :Malin Sjöholm; Malmö Klinisk mikrobiologi; []
   Nyckelord :formailn-fixed paraffin-embedded tissue; biobank; serum; dried blood spots; plasma; archival samples;

   Sammanfattning : Sweden has a long history of maintaining population-based registries and biobanks. This has resulted in large sample collections with long follow-up and large numbers of prospectively occurring disease endpoints providing an extensive resource for genetic research. LÄS MER