Liisa Viikari

Summary

Affiliation: University of Helsinki
Country: Finland

Publications

  1. ncbi The role of acetyl xylan esterase in the solubilization of xylan and enzymatic hydrolysis of wheat straw and giant reed
    Junhua Zhang
    College of Forestry, Northwest A and F University, 3 TaiCheng Road, Yangling 712100, China
    Biotechnol Biofuels 4:60. 2011
  2. ncbi Evaluation of preservation methods for improving biogas production and enzymatic conversion yields of annual crops
    Annukka Pakarinen
    University of Helsinki, Department of Food and Environmental Sciences, PO Box 27, 00014 Helsinki, Finland
    Biotechnol Biofuels 4:20. 2011
  3. ncbi Thermostable recombinant xylanases from Nonomuraea flexuosa and Thermoascus aurantiacus show distinct properties in the hydrolysis of xylans and pretreated wheat straw
    Junhua Zhang
    College of Forestry, Northwest A and F University, 3 TaiCheng Road, Yangling 712100, China
    Biotechnol Biofuels 4:12. 2011
  4. ncbi Thermostable enzymes in lignocellulose hydrolysis
    Liisa Viikari
    University of Helsinki, P O Box 27, 00014 Helsinki, Finland
    Adv Biochem Eng Biotechnol 108:121-45. 2007
  5. ncbi Synergistic action of xylanase and mannanase improves the total hydrolysis of softwood
    Anikó Várnai
    University of Helsinki, Food and Environmental Sciences, P O Box 27, 00014 Helsinki, Finland
    Bioresour Technol 102:9096-104. 2011
  6. ncbi Liquefaction of hydrothermally pretreated wheat straw at high-solids content by purified Trichoderma enzymes
    Nora Szijarto
    University of Helsinki, Department of Food and Environmental Sciences, P O Box 27, FIN 00014 Helsinki, Finland
    Bioresour Technol 102:1968-74. 2011
  7. ncbi Adsorption of monocomponent enzymes in enzyme mixture analyzed quantitatively during hydrolysis of lignocellulose substrates
    Anikó Várnai
    University of Helsinki, Food and Environmental Sciences, P O Box 27, 00014 Helsinki, Finland
    Bioresour Technol 102:1220-7. 2011
  8. ncbi Thermostable endoglucanases in the liquefaction of hydrothermally pretreated wheat straw
    Nora Szijarto
    University of Helsinki, Department of Food and Environmental Sciences, P, O, Box 27, FIN 00014, Helsinki, Finland
    Biotechnol Biofuels 4:2. 2011
  9. ncbi Changes in submicrometer structure of enzymatically hydrolyzed microcrystalline cellulose
    Paavo A Penttilä
    Departments of Physics and Food and Environmental Sciences, University of Helsinki, Helsinki, Finland
    Biomacromolecules 11:1111-7. 2010
  10. ncbi Role of oxidative enzymatic treatments on enzymatic hydrolysis of softwood
    Hetti Palonen
    VTT Biotechnology, P.O. Box 1500, FIN-02044 VTT Espoo, Finland
    Biotechnol Bioeng 86:550-7. 2004

Collaborators

  • Anikó Várnai
  • Nora Szijarto
  • Junhua Zhang
  • P Biely
  • Hetti Palonen
  • Matti Siika-Aho
  • Annukka Pakarinen
  • Paavo A Penttilä
  • Sanni P Voutilainen
  • Laura-Leena Kiiskinen
  • Maija Tenkanen
  • Clemens Altaner
  • Pekka Maijala
  • Maritta Kymäläinen
  • Seija Jaakkola
  • Frederick L Stoddard
  • Marko Peura
  • Kirsi Leppänen
  • Ritva Serimaa
  • Janne Ruokolainen
  • Jessica Lucenius
  • Pentti Jääskeläinen
  • Aki Kallonen
  • Arja Lappalainen
  • Marika Alapuranen
  • Terhi Puranen
  • Jari Vehmaanperä
  • Satu Hooman
  • Jarno Kallio
  • Anu Koivula
  • Markus Linder
  • Anne Belinda Thomsen
  • Anette S Schmidt
  • Kristiina Kruus
  • Jaime Eyzaguirre
  • Bodo Saake
  • Craig B Faulds

Detail Information

Publications14

  1. ncbi The role of acetyl xylan esterase in the solubilization of xylan and enzymatic hydrolysis of wheat straw and giant reed
    Junhua Zhang
    College of Forestry, Northwest A and F University, 3 TaiCheng Road, Yangling 712100, China
    Biotechnol Biofuels 4:60. 2011
    ..abstract:..
  2. ncbi Evaluation of preservation methods for improving biogas production and enzymatic conversion yields of annual crops
    Annukka Pakarinen
    University of Helsinki, Department of Food and Environmental Sciences, PO Box 27, 00014 Helsinki, Finland
    Biotechnol Biofuels 4:20. 2011
    ..abstract:..
  3. ncbi Thermostable recombinant xylanases from Nonomuraea flexuosa and Thermoascus aurantiacus show distinct properties in the hydrolysis of xylans and pretreated wheat straw
    Junhua Zhang
    College of Forestry, Northwest A and F University, 3 TaiCheng Road, Yangling 712100, China
    Biotechnol Biofuels 4:12. 2011
    ..abstract:..
  4. ncbi Thermostable enzymes in lignocellulose hydrolysis
    Liisa Viikari
    University of Helsinki, P O Box 27, 00014 Helsinki, Finland
    Adv Biochem Eng Biotechnol 108:121-45. 2007
    ..New types of process configurations based on thermostable enzymes are discussed...
  5. ncbi Synergistic action of xylanase and mannanase improves the total hydrolysis of softwood
    Anikó Várnai
    University of Helsinki, Food and Environmental Sciences, P O Box 27, 00014 Helsinki, Finland
    Bioresour Technol 102:9096-104. 2011
    ..Both hemicellulolytic enzymes are crucial as accessory enzymes when designing efficient mixtures for the total hydrolysis of lignocellulosic substrates containing both hemicelluloses...
  6. ncbi Liquefaction of hydrothermally pretreated wheat straw at high-solids content by purified Trichoderma enzymes
    Nora Szijarto
    University of Helsinki, Department of Food and Environmental Sciences, P O Box 27, FIN 00014 Helsinki, Finland
    Bioresour Technol 102:1968-74. 2011
    ..The reduction of viscosity did not correlate with the saccharification obtained in the same reaction, suggesting that efficient liquefaction is rather dependent on the site than the frequency of enzymatic cleavages...
  7. ncbi Adsorption of monocomponent enzymes in enzyme mixture analyzed quantitatively during hydrolysis of lignocellulose substrates
    Anikó Várnai
    University of Helsinki, Food and Environmental Sciences, P O Box 27, 00014 Helsinki, Finland
    Bioresour Technol 102:1220-7. 2011
    ..Only with the catalytically oxidized spruce samples, the bound enzymes started to be released as the hydrolysis degree reached 80%. The results based on enzyme activities and protein assay were in good accordance...
  8. ncbi Thermostable endoglucanases in the liquefaction of hydrothermally pretreated wheat straw
    Nora Szijarto
    University of Helsinki, Department of Food and Environmental Sciences, P, O, Box 27, FIN 00014, Helsinki, Finland
    Biotechnol Biofuels 4:2. 2011
    ..abstract:..
  9. ncbi Changes in submicrometer structure of enzymatically hydrolyzed microcrystalline cellulose
    Paavo A Penttilä
    Departments of Physics and Food and Environmental Sciences, University of Helsinki, Helsinki, Finland
    Biomacromolecules 11:1111-7. 2010
    ..This indicates that the enzymes act on the surface of cellulose bundles and are unable to penetrate into the nanopores of wet cellulose...
  10. ncbi Role of oxidative enzymatic treatments on enzymatic hydrolysis of softwood
    Hetti Palonen
    VTT Biotechnology, P.O. Box 1500, FIN-02044 VTT Espoo, Finland
    Biotechnol Bioeng 86:550-7. 2004
    ..Surface analysis of the lignocellulosic substrate before and after the laccase and cellulase treatments revealed an enrichment of lignin and an increase of carboxylic groups on the surface of the hydrolysis residue...
  11. ncbi Evaluation of wet oxidation pretreatment for enzymatic hydrolysis of softwood
    Hetti Palonen
    VTT Biotechnology, PO Box 1500, FIN-02044 VTT, Espoo, Finland
    Appl Biochem Biotechnol 117:1-17. 2004
    ..The highest sugar yield in a 72-h hydrolysis, 79% of theoretical, was obtained using a pretreatment of 200 degrees C for 10 min at neutral pH...
  12. ncbi Cloning, expression, and characterization of novel thermostable family 7 cellobiohydrolases
    Sanni P Voutilainen
    VTT Technical Research Centre of Finland, P O Box 1000, FI 02044 VTT, Finland
    Biotechnol Bioeng 101:515-28. 2008
    ..aurantiacus Cel7A, which was also relatively weakly inhibited by cellobiose. These results are discussed from the structural point of view based on the three-dimensional homology models of these enzymes...
  13. ncbi Laccase from Melanocarpus albomyces binds effectively to cellulose
    Laura-Leena Kiiskinen
    VTT Biotechnology, P.O. Box 1500, FIN-02044 VTT, Finland
    FEBS Lett 576:251-5. 2004
    ..1-0.5 M Na2SO4. No binding was detected with laccases from Trametes hirsuta or Mauginiella sp., which suggests that binding to cellulose is typical for only some laccases...
  14. ncbi Regioselective deacetylation of cellulose acetates by acetyl xylan esterases of different CE-families
    Clemens Altaner
    Institute of Wood Chemistry, Federal Research Centre of Forestry and Forest Products, Leuschnerstr 91, D-21002 Hamburg, Germany
    J Biotechnol 105:95-104. 2003
    ..Evidence was found that the deacetylation reaction of the CE 1 family enzymes proceeded faster in C2- than in C3-position of CA. The enzymes were able to cleave acetyl groups from fully substituted anhydroglucose units...