Sökning: "3-propanediol"

Visar resultat 1 - 5 av 14 avhandlingar innehållade ordet 3-propanediol.

1. 1. Exploring the Propanediol Utilization Pathway in Lactobacillus reuteri

   Författare :Lu Chen; Bioteknik; []
   Nyckelord :Lactobacillus reuteri; propanediol utilization pathway; microcompartment; shell proteins; glycerol; 3-hydroxypropionaldehyde; 3-hydroxypropionic acid; 1; 3-propanediol; glycerol dehydratase; 1; 3-propanediol oxidoreductase; propionaldehyde dehydrogenase; redox balance; substrate selectivity;

   Sammanfattning : Concerns regarding environmental issues have led to increasing efforts for investigating sustainable production routes for the future industry that is based on renewable resources. Among the biobased chemicals, the C3-chemicals 3-hydroxypropionaldehyde (3-HPA), 1,3-propanediol (1,3-PDO) and 3-hydroxypropionic acid (3-HP), have been identified as top candidates for the chemical industry. LÄS MER

3. 2. Strategies for building polymers from renewable sources : Using prepolymers from steam treatment of wood and monomers from fermentation of agricultural products

   Författare :Margaretha Söderqvist Lindblad; KTH; []
   Nyckelord :renewable sources; biodegradable polymers; hemicellulose; 2-hydroxyethyl methacrylate; modification of hemicellulose; methacrylation reaction; rheology measurements; dynamic-mechanical behavior; 1; 3-propanediol; 1; 4-cyclohexanedimethanol; succinic ac;

   Sammanfattning : A strategic research area today is development of polymericproducts made from renewable sources. The ways of utilizingrenewable sources studied in this thesis are using 1)prepolymers obtained by steam treatment of wood and 2) monomersobtainable by fermentation of agricultural products. LÄS MER

4. 3. Microbial Production of Bio-Based Chemicals: A Biorefinery Perspective

   Författare :Tarek Dishisha; Bioteknik; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Biorefinery; platform chemical; organic acid; propionic acid; 3-hydroxypropionic acid; 3-hydroxypropionaldehyde; methacrylic acid; 1; 3-propanediol; Propionibacterium acidipropionici; Lactobacillus reuteri; Gluconobacter oxydans; high cell density fermentation; biotransformation; product inhibition; cell recycle; immobilized cells; chemical catalysis; pdu operon;

   Sammanfattning : A shift from fossil- to renewable biomass feedstock for the emerging bio-based economy requires the development and adoption of new sustainable technologies that are more suited for transformation of biomass components to chemicals, materials and energy. This thesis presents investigations on the development of processes based on industrial biotechnology as a key element for the production of chemicals from agro-/industrial by-products. LÄS MER

5. 4. Valorisation of Renewable Building Blocks via Transition Metal Catalysis – Glycerol- and Amino Acid Derived Compounds in Hydrogen Borrowing and RuAAC Reactions

   Författare :Anna Said Stålsmeden; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; amination; alkylation; RuAAC; 1 3-propanediol; renewable precursors; hydrogen borrowing; 1 2 3-triazole; solketal; glycerol; amino acid-derived azide;

   Sammanfattning : To a large extent, organic building blocks are today obtained from petroleum-based products. From an environmental point of view, biomass-derived compounds are more sustainable alternatives to such oil-derived molecules. The 12 principles of green chemistry describe how chemical processes can be improved in terms of sustainability. LÄS MER

7. 5. Lignin Model Compounds: Synthesis, Stereochemistry and Acidolysis

   Författare :Shiming Li; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; boric acid complexes; Arylglycerol b-aryl ethers; stereochemistry; 3-Diaryl-2-propen-1-ols; 1; Phenylcoumarans; lignin model compounds; acidolysis; ion-exchange chromatography; 3-propanediols; 2-Diaryl-1; 2; X-ray crystallography;

   Sammanfattning : Lignin model compounds representative of structural elements in lignin of the b-1, b-5, b-O-4, cinnamaldehyde and cinnamyl alcohol types were synthesized. erythro-Forms of b-1 models of the 1,2-diaryl-1,3-propanediol type were prepared by BF3-catalyzed rearrangement of chalcone epoxides and subsequent reduction of the rearrangement products with NaBH4. LÄS MER