Essays about: "lignin"

Showing result 1 - 5 of 148 essays containing the word lignin.

1. 1. Impact of nitrogen availability and nitrogen structural composition on fungal enzymatic activity and growth : how nutrient availability governs response and development of three saprotrophic Basidiomycetes

   University essay from SLU/Dept. of Soil and Environment

   Author : Bella Strid; [2024]
   Keywords : nitrogen; tannins; condensed tannins; MnP; manganese peroxidase; peptidase; saprotrophic basidiomycetes;

   Abstract : Fungi excrete a wide variety of extracellular enzymes to scavenge for nutrients, such as the often scarce yet essential nutrient nitrogen. All fungi produce highly specialized hydrolytic enzymes, e.g. peptidases, that depolymerize organic molecules. READ MORE

3. 2. Microbial production of chemical building blocks from lignin

   University essay from Lunds universitet/Teknisk mikrobiologi

   Author : Kevin Bertilsson; [2024]
   Keywords : Lignin; Green plastic; Vanillin; Microbial production; Applied microbiology; Biology and Life Sciences;

   Abstract : Plastics, derived from fossil fuels, have raised considerable environmental concerns. This has prompted the search for sustainable and safer plastic precursors alternatives. One alternative explored in the present study is vanillin, a phenolic compound derived from lignin, an abundant and renewable natural polymer. READ MORE

4. 3. Thermal Conversion of Cellulose-Lignin Precursors into Carbon Fibres

   University essay from Uppsala universitet/Nanoteknologi och funktionella material

   Author : Sofia Westberg; [2023]
   Keywords : Carbon fiber; lignin; cellulose; continuous conversion;

   Abstract : Carbon fibres are used in many applications thanks to their exceptional tensile properties in relation to their relatively low weight. These thin strands of at least 90% carbon are mixed with a matrix such as epoxy to form composites used for cars, wind turbines, prosthetics, and many other things. READ MORE

5. 4. Impact of pre-treatments on the brightness stability of a conventional and near neutral pH ECF-light bleaching sequence

   University essay from KTH/Fiber- och polymerteknologi

   Author : Ali Amirjani; [2023]
   Keywords : ECF; Bleaching; Pulp; AOX; Brightness Stability; ECF; Blekning; Massa; AOX; Ljushetsstabilitet;

   Abstract : Syftet med denna studie är att undersöka inverkan av förbehandlingar på ljushetsstabiliteten av Northern Bleached Softwood Kraft (NBSK) som har blekts enligt (OO) (OP) D/Dn (PO) bleksekvensen. Effekten av förbehandling med xylanas (X), mild sur (A), DTPA (Q) samt ett kombinerad DTPA- & xylanassteg (Q+X) har studerats. READ MORE

6. 5. Recovery of Dialcohol Cellulose using Micro- and Ultrafiltration Processes

   University essay from Lunds universitet/Kemiteknik (CI)

   Author : Lina Näslund; Gabriella Petersson; [2023]
   Keywords : Membrane filtration; Ultrafiltration; Microfiltration; Dialcohol cellulose; DAC; Bioplastics; Chemical engineering; Process design; Technology and Engineering;

   Abstract : The waste management and production of plastic play a concerning part in global warming and continues to have a negative effect on the environment. A promising strategy to address this challenge is to develop new sustainable materials, to replace current fossil-based plastics. READ MORE