Sökning: "Biobased chemicals"

Visar resultat 1 - 5 av 14 avhandlingar innehållade orden Biobased chemicals.

  1. 1. Cryogels Based on Crosslinked Cells as Green Biocatalysts for Biotechnology

    Författare :Oksana Zaushitsyna; Bioteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Cells; Crosslinkers; PVA PEI; Immobilization; Biocatalysts; Biobased chemicals; Biotransformation; stress tolerance;

    Sammanfattning : Abstract Due to the finite nature of fossil resources and their environmental impact, such as greenhouse gases and climate change, the bio-based production of chemicals, materials and fuels is the subject of extensive research in industrial biotechnology. Biotransformation and fermentation are considered to be mild, “green” processes that make use of effective and reliable biocatalysts to provide bio-based chemicals. LÄS MER

  3. 2. Towards sustainable plastics : Microbial production of aromatic and aliphatic building blocks from biobased feedstock and plastic hydrolysate

    Författare :Oliver Englund Örn; Bioteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Cell factories; Biobased plastics; Protocatechuic acid; Adipic acid; 4-Hydroxybyratate; 1; 4-Butanediol; PBAT; Enzymatic recycling; Synthetic promoter library;

    Sammanfattning : The current plastic system is unsustainable and needs to change. Plastics are mainly produced from fossil feedstock, contributing to greenhouse gas emissions, and low rate of post-consumer recycling results in pollution on land and in oceans with high ecological impact, and huge loss of valuable material. LÄS MER

  4. 3. Biobased production of succinic acid by Escherichia coli fermentation

    Författare :Christian Andersson; Gen Larsson; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Biokemisk processteknik; Biochemical Process Engineering;

    Sammanfattning : The prospects of peak oil, climate change and the dependency of fossil carbon have urged research and development of production methods for the manufacture of fuels and chemicals from renewable resources (biomass). The present thesis illustrates different aspects of biobased succinic acid production by a metabolically engineered E. coli strain. LÄS MER

  5. 4. Microbial production of 3-hydroxypropionic acid and poly(3-hydroxypropionate): Investigation of Lactobacillus reuteri propanediol utilization pathway enzymes

    Författare :Ramin Sabet Azad; Bioteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Platform chemicals; biopolymers; 3-hydroxypropionic acid; 3-hydroxypropionaldehyde; glycerol; poly 3-hydroxypropionate ; polyhydroxyalkanoates; Escherichia coli; Lactobacillus reuteri; propanediol utilization pathway; propionaldehyde dehydrogenase; biotransformation; cofactor regeneration; NADH oxidase;

    Sammanfattning : Concerns regarding environmental issues such as greenhouse gas emissions and climate change have led to a shift within the research community and chemical and energy industry sectors for finding sustainable routes for producing fuels and chemicals from renewable resources, thereby minimizing our dependence on petroleum. The C3-chemical 3-hydroxypropionic acid has been identifed as a top candidate for the biobased chemical industry. LÄS MER

  7. 5. Strategies for Utilizing Biobased and Recycled Resources for Polylactide Plasticization

    Författare :Xi Yang; Minna Hakkarainen; Karin Odelius; Youssef Habibi; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Polylactide; poly 3-hydroxybutyrate ; poly butylene succinate-co-adipate ; bio-based; microwave; reactive extrusion; recycling; plasticizing; migration resistance; crystallization; polylaktid; poly 3-hydroxibutyrat ; poly butylen succinat-sam-adipat ; biobaserade; mikrovågsugn; reaktiv extrudering; återvinning; mjukgörare; migrationsmotstånd; kristallisering; Fiber- och polymervetenskap; Fibre and Polymer Science;

    Sammanfattning : There are many aspects that should be considered to achieve truly "environmental friendly" and "sustainable" materials. These include the raw material resource, the energy consumption, the chemicals generated and used, the emissions during production, processing, transportation, disposal and so on. LÄS MER