Sökning: "sekventiell extraktion"

Visar resultat 1 - 5 av 6 avhandlingar innehållade orden sekventiell extraktion.

1. 1. Bark Biorefinery : Isolation, Characterization and Application

   Författare :Isabella Kwan; Monica Ek; Åsa Emmer; Anette Larsson; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Sustainability; bark; biorefinery; Norway spruce; nanocellulose; Pickering emulsion; organosolv; extraction; lignin; Hållbarhet; bark; bioraffinaderi; gran; nanocellulosa; Pickering emulsioner; organosolv; extraktion; lignin; Fiber- och polymervetenskap; Fibre and Polymer Science;

   Sammanfattning : To fulfill the United Nations’ 17 sustainable development goals, there is a need to transition from a petroleum-based society toward a more sustainable one which requires new solutions and the production of materials, chemicals, and energy from renewable resources. Using side-stream products from industries to produce value-added products will be economically beneficial. LÄS MER

3. 2. Cobalt and Nickel Bioavailability for Biogas Formation

   Författare :Jenny Gustavsson; Bo Svensson; Anna Karlsson; Piet N.L. Lens; Linköpings universitet; []
   Nyckelord :Biogas production; bioavailability; cobalt; nickel; sequential extraction; S XANES; 454-pyrosequencing.; Biogasproduktion; biotillgänglighet; kobolt; nickel; sekventiell extraktion; S XANES; 454-pyrosekvensering;

   Sammanfattning : Supplementation of trace metals such as Co and Ni may improve anaerobic digestion of organic material for biogas formation. Which trace metals that are needed and the quantity to apply are, at least partly, related to metal speciation and bioavailability. LÄS MER

4. 3. Chemical Speciation of Sulfur and Metals in Biogas Reactors : Implications for Cobalt and Nickel Bio-uptake Processes

   Författare :Sepehr Shakeri Yekta; Bo Svensson; Ulf Skyllberg; Åsa Danielsson; Charles Banks; Linköpings universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Biogas; Anaerobic digestion; Chemical speciation; bio-uptake; Sulfur; Iron; Cobalt; Nickel; Biogas; Anaerob nedbrytning; Kemisk speciering; Bio-upptag; Svavel; Järn; Kobolt; Nickel;

   Sammanfattning : A balanced supply of micronutrients, including metals such as iron (Fe), cobalt (Co), and nickel (Ni), is required for the efficient and stable production of biogas. During biogas formation, the uptake of micronutrient metals by microorganisms is controlled by a complex network of biological and chemical reactions, in which reduced sulfur (S) compounds play a central role. LÄS MER

5. 4. Lignin-Based Thermosets with Tunable Mechanical and Morphological Properties : A Study of Structure-Property Relationships

   Författare :Iuliana Ribca; Mats Johansson; Martin Lawoko; Stephan V. Roth; Mika Sipponen; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Softwood; hardwood; technical lignin; solvent fractionation; allylation; thiol-ene thermosets; thioether linkage; wide-angle X-ray scattering; π-π stacking interactions; Barrträ; lövträ; tekniskt lignin; lösningsmedelsfraktionering; allylering; tiol-en-härdplaster; tioeterbindning; vidvinkelröntgenspridning; π-π staplingsinteraktioner; Fiber- och polymervetenskap; Fibre and Polymer Science;

   Sammanfattning : Nowadays, there is an urgent need to decrease our dependence on fossilresources and shift towards the use of renewable resources for advancingsustainable development. Utilizing renewable and bio-based raw materials,such as lignocellulosic biomass, for designing new materials is a promisingapproach to promote this objective. LÄS MER

7. 5. Weathering and water quality in an area with mineralized till, Liikavaara, northern Sweden

   Författare :Jonas Thunberg; Luleå tekniska universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Applied Geology; Tillämpad geologi;

   Sammanfattning : Avhandlingen består av tre artiklar som behandlar olika aspekter på vittring och vattenkvalitet i området vid kopparfyndigheten Liikavaara Östra i norra Norrbotten. Moränen i området har naturligt förhöjda metallhalter, särskilt av koppar, och i lic-avhandlingen redovisas med olika metoder att naturligt vittring i detta område kan leda till förhöjda metallhalter i lokalt grundvatten i jämförelse med ett referensområde med låga metallhalter i moränen. LÄS MER