Sökning: "Tuulia Hyötyläinen"

Visar resultat 1 - 5 av 6 avhandlingar innehållade orden Tuulia Hyötyläinen.

1. 1. Novel Solid Phase Extraction and Mass Spectrometry Approaches to Multicomponent Analyses in Complex Matrices

   Författare :Nahid Amini; Gunnar Thorsén; Tuulia Hyötyläinen; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Sample preparation; SPE; RAM; GCB µ-trap; GCB disk; High temperature LC; LC MS; ESI; APCI; Matrix effects; LIT-MS; SALDI; Sample screening; Oxidized GCB; Silicon nitride; Analytical chemistry; Analytisk kemi; Analytical Chemistry; analytisk kemi;

   Sammanfattning : Analysis of compounds present in complex matrices is always a challenge, which can be partly overcome by applying various sample preparation techniques prior to detection. Ideally, the extraction techniques should be as selective as possible, to minimize the concentration of interfering substances. LÄS MER

3. 2. Novel and Traditional Risk Factors for Coronary Artery Disease : Role of Coronary Artery Calcium, Lipidomics, Psychosocial Factors and Diet

   Författare :Demir Djekic; Ole Fröbert; Annika Rosengren; Tuulia Hyötyläinen; Anna M. Nordenskjöld; Magnus Bäck; Örebro universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Novel risk factors; coronary artery calcium; lipidomics; lipidome; psychosocial factors; vegetarian diet; gut microbiota; metabolome;

   Sammanfattning : Background: The aim of the research reported in this thesis was to determine the association of novel and traditional risk factors with coronary artery calcium (CAC), a marker of subclinical coronary artery disease (CAD) in healthy individuals. In addition, we investigated the effects of a vegetarian, compared to a meat diet, on novel and traditional risk factors in patients with diagnosed CAD. LÄS MER

4. 3. Development of dynamic microwave and sonication-assisted extraction techniques coupled on-line to gas chromatography

   Författare :Magnus Ericsson; Tuulia Hyötyläinen; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Analytical chemistry; Analytisk kemi; Analytical Chemistry; analytisk kemi;

   Sammanfattning : This thesis describes the evaluation and construction of two solvent extraction methods for solid samples. The techniques are called Dynamic microwaveassisted extraction (I-III) and Dynamic sonication-assisted solvent extraction (IV-V). Both techniques are based on dynamic solvent extraction and are performed at elevated temperatures and pressures. LÄS MER

5. 4. PLE with integrated clean up followed by alternative detection steps for cost-effective analysis of dixons and dioxin-like compounds

   Författare :Erik Spinnel; Peter Haglund; Patrik Andersson; Tuulia Hyötyläinen; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Pressurized liquid extraction PLE ; PLE-C; modular PLE; ELISA; dioxin; dioxin-like compounds; GCxGC; analytical methods; Environmental chemistry; Miljökemi;

   Sammanfattning : Polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) are two structurally related groups of chemicals, generally referred to as `dioxins´. These are of great concern due to their high toxicity and global spread. LÄS MER

7. 5. Damsel in distress – metabolomics as a novel tool to investigate the effects of wastewater exposure on damselfly larvae

   Författare :Jana Späth; Malin L. Nording; Jerker Fick; Stina Jansson; Tuulia Hyötyläinen; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; biomarkers; ecotoxicology; invertebrates; GC-MS; LC-MS; LC-MS MS; metabolomics; micropollutants; pharmaceuticals; risk assessment; ekotoxikologi; Ecotoxicology; Analytical Chemistry; analytisk kemi;

   Sammanfattning : Aquatic organisms, such as aquatic invertebrates, are exposed to anthropogenic pollutants through their environment. These pollutants, despite their low levels, can adversely affect exposed individuals or even entire ecosystems, especially when present in complex mixtures. LÄS MER