Výsledky vyhledávání - "Ronny Wahlström"

Clustered Single Cellulosic Fiber Dissolution Kinetics and Mechanisms through Optical Microscopy under Limited Dissolving Conditions

Autor: Ronny Wahlström, Ilkka Kilpeläinen, Ulla Holopainen-Mantila, Valtteri Mäkelä, Alistair W. T. King

Publikováno v: Mäkelä, V, Wahlström, R, Holopainen-Mantila, U, Kilpeläinen, I & King, A W T 2018, ' Clustered Single Cellulosic Fiber Dissolution Kinetics and Mechanisms through Optical Microscopy under Limited Dissolving Conditions ', Biomacromolecules, vol. 19, no. 5, pp. 1635-1645 . https://doi.org/10.1021/acs.biomac.7b01797

Herein, we describe a new method of assessing the kinetics of dissolution of single fibers by dissolution under limited dissolving conditions. The dissolution is followed by optical microscopy under limited dissolving conditions. Videos of the dissol

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0f84cffaf0b7cce771c5e2e7d2d7ade3
https://doi.org/10.1021/acs.biomac.7b01797

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Screening of glycoside hydrolases and ionic liquids for fibre modification

Autor: Ilkka Kilpeläinen, Arno Parviainen, Sasikala Anbarasan, Jenni Rahikainen, Anna Suurnäkki, Alistair W. T. King, Ossi Turunen, Terhi Puranen, Kristiina Kruus, Ronny Wahlström

Publikováno v: Rahikainen, J, Anbarasan, S, Wahlström, R, Parviainen, A, King, A W T, Puranen, T, Kruus, K, Kilpeläinen, I, Turunen, O & Suurnäkki, A 2018, ' Screening of glycoside hydrolases and ionic liquids for fibre modification ', Journal of Chemical Technology and Biotechnology, vol. 93, no. 3, pp. 818-826 . https://doi.org/10.1002/jctb.5435

BACKGROUNDThis study elaborates the possibility to apply combined ionic liquid (IL) and enzyme treatments for pulp fibre modification. The approach involves swelling of fibre surfaces with IL followed by enzymatic modification of the disrupted fibre

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cb3a55d44a22fb4af2f33a9f59d56d6b
https://doi.org/10.1002/jctb.5435

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Lignin cationization with glycidyltrimethylammonium chloride aiming at water purification applications

Autor: Tarja Tamminen, Juha Heikkinen, Anna Kalliola, Hanna Kyllönen, Ronny Wahlström

Publikováno v: Wahlström, R, Kalliola, A, Heikkinen, J, Kyllönen, H & Tamminen, T 2017, ' Lignin cationization with glycidyltrimethylammonium chloride aiming at water purification applications ', Industrial Crops and Products, vol. 104, pp. 188-194 . https://doi.org/10.1016/j.indcrop.2017.04.026

Hardwood organosolv lignin (OSL) and enzymatic hydrolysis lignin (EHL) from softwood were cationized by glycidyltrimethylammonium chloride (GTAC) as new lignin starting materials for the reaction. The products were in detail characterized by 31P-NMR

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d860762290c4ad6c345db2e3412dac1b
https://doi.org/10.1016/j.indcrop.2017.04.026

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Process for separating proteins from biomass materials

Autor: Ronny Wahlström, Lauri Kuutti, Jaakko Hiltunen, Sauli Vuoti, Dilek Ercili-Cura, Katariina Rommi

Publikováno v: Wahlström, R, Kuutti, L, Hiltunen, J, Vuoti, S, Ercili-Cura, D & Rommi, K Nov. 07 2018, Process for separating proteins from biomass materials, Patent No. EP3397066 .
VTT Technical Research Centre of Finland-PURE

The present invention relates to a process for separating proteins and/or protein fractions from biomass materials, wherein the process comprises the steps, where in the first step biomass material is mixed with an aqueous DES comprising a hydrogen b

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::659f33437c8a204a1957249897c0b202
https://cris.vtt.fi/en/publications/68dda74e-bc16-4f32-a0db-e2f28ea1e030

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Sustainability of cellulose dissolution and regeneration in 1,5-diazabicyclo[4.3.0]non-5-enium acetate: a batch simulation of the IONCELL-F process

Autor: Ronny Wahlström, Anna Suurnäkki, Stella Rovio, Uula Hyväkkö, Arno Parviainen, Ilkka Kilpeläinen, U. Liimatainen, Alistair W. T. King, Tiina Liitiä, Jussi Helminen

Publikováno v: Parviainen, A, Wahlström, R, Liimatainen, U, Liitiä, T, Rovio, S, Helminen, J K J, Hyväkkö, U, King, A W T, Suurnäkki, A & Kilpeläinen, I 2015, ' Sustainability of cellulose dissolution and regeneration in 1,5-diazabicyclo[4.3.0]non-5-enium acetate: a batch simulation of the IONCELL-F process ', RSC Advances, vol. 5, pp. 69728-69737 . https://doi.org/10.1039/C5RA12386K

The recyclability of 1,5-diazabicyclo[4.3.0] non-5-enium acetate ([DBNH][OAc]), as a direct dissolution solvent for cellulose, was evaluated during laboratory scale recycling trials. The main objective was to simulate the conditions of a spinning bat

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::da27b00fd41d3e3ebfee456a7b4474ae
https://doi.org/10.1039/C5RA12386K

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High stability and low competitive inhibition of thermophilic Thermopolyspora flexuosa GH10 xylanase in biomass-dissolving ionic liquids

Autor: Michael Hummel, Heikki Ojamo, Sasikala Anbarasan, Ossi Turunen, Ronny Wahlström, Herbert Sixta

Publikováno v: Anbarasan, S, Wahlström, R, Hummel, M, Ojamo, H, Sixta, H & Turunen, O 2017, ' High stability and low competitive inhibition of thermophilic Thermopolyspora flexuosa GH10 xylanase in biomass-dissolving ionic liquids ', Applied Microbiology and Biotechnology, vol. 101, no. 4, pp. 1487-1498 . https://doi.org/10.1007/s00253-016-7922-9

Thermophilic Thermopolyspora flexuosa GH10 xylanase (TfXYN10A) was studied in the presence of biomass-dissolving hydrophilic ionic liquids (ILs) [EMIM]OAc, [EMIM]DMP and [DBNH]OAc. The temperature optimum of TfXYN10A with insoluble xylan in the pulp

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::22db7928571eb2cda3042e6a828d58d4
https://cris.vtt.fi/en/publications/5e8fd000-70f4-4130-a54a-7139b9a2b06d

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Enzymatic hydrolysis of lignocellulosic polysaccharides in the presence of ionic liquids

Autor: Ronny Wahlström, Anna Suurnäkki

Publikováno v: Wahlström, R & Suurnäkki, A 2014, ' Enzymatic hydrolysis of lignocellulosic polysaccharides in the presence of ionic liquids ', Green Chemistry, vol. 17, no. 2, pp. 694-714 . https://doi.org/10.1039/C4GC01649A

Biofuels and -chemicals can be produced from carbohydrates in lignocellulosic biomass. For an efficient total enzymatic hydrolysis of the plant cell wall polysaccharides, a pretreatment step is required. Ionic liquids (ILs) have recently gained consi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ded0e3abd03c92fcb82aac8ab00b945c
https://doi.org/10.1039/C4GC01649A

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Cellulose hydrolysis and binding withTrichoderma reeseiCel5A and Cel7A and their core domains in ionic liquid solutions

Autor: Jenni Rahikainen, Kristiina Kruus, Ronny Wahlström, Anna Suurnäkki

Publikováno v: Biotechnology and Bioengineering. 111:726-733

Ionic liquids (ILs) dissolve lignocellulosic biomass and have a high potential as pretreatment prior to total enzymatic hydrolysis. ILs are, however, known to inactivate cellulases. In this article, enzymatic hydrolysis of microcrystalline cellulose

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::16b79de9deea548034db0264f073a59f
https://doi.org/10.1002/bit.25144

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Analysis of mono- and oligosaccharides in ionic liquid containing matrices

Autor: Stella Rovio, Anna Suurnäkki, Ronny Wahlström

Publikováno v: Wahlström, R, Rovio, S & Suurnäkki, A 2013, ' Analysis of mono-and oligosaccharides in ionic liquid containing matrices ', Carbohydrate Research, vol. 373, pp. 42-51 . https://doi.org/10.1016/j.carres.2012.11.006

Ionic liquids (ILs), that is, salts with melting points Trichoderma reesei endoglucanase Cel5A. According to the results, [DMIM]DMP and [EMIM]AcO] showed clear differences in enzyme inactivation.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8ea827f05dbde775af4bb127c91bf6a7
https://doi.org/10.1016/j.carres.2012.11.006

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Ionic Liquids:Enzymatic Hydrolysis of Lignocellulose

Autor: Ronny Wahlström, Anna Suurnäkki

Publikováno v: Wahlström, R & Suurnäkki, A 2016, Ionic Liquids : Enzymatic Hydrolysis of Lignocellulose . in R A Scott (ed.), Encyclopedia of Inorganic and Bioinorganic Chemistry . Wiley, pp. 235-248 . https://doi.org/10.1002/9781119951438.eibc2415
Encyclopedia of Inorganic and Bioinorganic Chemistry

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::680f9f41cb629b98b5b27365bc0d0d67
https://cris.vtt.fi/en/publications/df3c5acb-d4ea-418f-ae4a-3017f39b6985

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