Zobrazeno 1 - 10
of 62
pro vyhledávání: '"Sirkka Liisa Maunu"'
Autor:
Andres Lust, Gunnar Nurk, Sami-Pekka Hirvonen, Kristian Semjonov, Ivo Laidmäe, Karin Kogermann, Sirkka Liisa Maunu, Jyrki Heinämäki, Enn Lust, Jouko Yliruusi
The present study introduces a modified melt-electrospinning (MES) method for fabricating the melt-electrospun fibers (MSFs) of a poorly water-soluble drug and carrier polymer. The MES of poorly water-soluble model drug indomethacin (IND) and hydroph
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e2fcd1f35578124f83ba2d3759b6c74c
http://hdl.handle.net/10138/307579
http://hdl.handle.net/10138/307579
Autor:
Sirkka Liisa Maunu, Taina Kamppuri, Stina Grönqvist, Paavo A. Penttilä, Marianna Vehviläinen, Thaddeus Maloney, Ritva Serimaa, Tommi Virtanen
Publikováno v:
Virtanen, T, Penttilä, P A, Maloney, T C, Grönqvist, S, Kamppuri, T, Vehviläinen, M, Serimaa, R & Maunu, S L 2015, ' Impact of mechanical and enzymatic pretreatments on softwood pulp fiber wall structure studied with NMR spectroscopy and X-ray scattering ', Cellulose, vol. 22, no. 3, pp. 1565-1576 . https://doi.org/10.1007/s10570-015-0619-x
Dissolution of wood pulp can be enhanced by applying certain pretreatments before exposing the fibers to solvents. We have analyzed effect of mechanical and enzymatic pretreatments on softwood fiber wall structure using nuclear magnetic resonance (NM
Autor:
Sirkka Liisa Maunu, Tommi Virtanen
Publikováno v:
Virtanen, T & Maunu, S L 2014, ' NMR spectroscopic studies on dissolution of softwood pulp with enhanced reactivity ', Cellulose, vol. 21, no. 1, pp. 153-165 . https://doi.org/10.1007/s10570-013-0144-8
N-methylmorpholine N-oxide (NMMO) is a known cellulose solvent used in industrial scale (LyoCel process). We have studied interactions between pretreated softwood pulp fibers and aqueous NMMO using nuclear magnetic resonance (NMR) spectroscopic metho
Autor:
Sirkka Liisa Maunu, Pirita Rämänen
Publikováno v:
Progress in Organic Coatings. 77:361-368
One- and two-dimensional NMR spectroscopy was used to evaluate the structure of tall oil fatty acid (TOFA)-based alkyd resins and waterborne alkyd–acrylic copolymers. An increase in the functionality of the polyol that is used in the alkyd resin sy
Autor:
Ritva Serimaa, Helena Parviainen, Ilkka Kilpeläinen, Tommi Virtanen, Stina Grönqvist, Arno Parviainen, Patrik Ahvenainen, Sirkka Liisa Maunu, Thaddeus Maloney
Publikováno v:
Parviainen, H, Parviainen, A, Virtanen, T, Kilpeläinen, I, Ahvenainen, P, Serimaa, R, Grönqvist, S, Maloney, T & Maunu, S L 2014, ' Dissolution enthalpies of cellulose in ionic liquids ', Carbohydrate Polymers, vol. 113, pp. 67-76 . https://doi.org/10.1016/j.carbpol.2014.07.001
In this work, interactions between cellulose and ionic liquids were studied calorimetrically and by optical microscopy. Two novel ionic liquids (1,5-Diazabicyclo[4.3.0]non-5-enium propionate and N-methyl-1,5-diazabicyclo[4.3.0]non-5-enium dimethyl ph
Autor:
Tommi Virtanen, Kirsi Jouppila, Jarno Salonen, Mikko Tenho, Sirkka Liisa Maunu, Antti Nordberg, Anne Juppo, Ville P. Heljo
Publikováno v:
Heljo, V P, Nordberg, A, Tenho, M, Virtanen, T, Jouppila, K, Salonen, J, Maunu, S L & Juppo, A M 2012, ' The effect of water plasticization on the molecular mobility and crystallization tendency of amorphous disaccharides ', Pharmaceutical Research, vol. 29, no. 10, pp. 2684-2697 . https://doi.org/10.1007/s11095-011-0658-4
Purpose To study how water plasticization affects the molecular mobility and crystallization tendency of freeze-dried trehalose, sucrose, melibiose and cellobiose. Methods Freeze-dried disaccharides were subjected to different relative humidity atmos
Publikováno v:
Journal of Polymer Science Part A: Polymer Chemistry. 50:3067-3076
Various copper-based catalyst systems and reaction conditions were studied in the graft copolymerization of N,N-dimethylacrylamide (DMAam) with a cellulose-based macroinitiator by controlled radical polymerization. The cellulose macroinitiator with d
Publikováno v:
Cellulose. 19:901-912
Cellulose whiskers were prepared from wood- and cotton-based microcrystalline cellulose and dried by two methods: freeze-drying or air-drying. The effect of drying method on the properties and structure of the whiskers were studied. Furthermore, the
Publikováno v:
European Polymer Journal. 48:136-145
Water-soluble cellulose-graft-PDMAam copolymers were prepared by single-electron-transfer living radical polymerization (SET-LRP). Cellulose based macroinitiator for SET-LRP with a degree of substitution DS ≈ 2 was synthesized from softwood dissolv
Autor:
Tommi Virtanen, Sirkka Liisa Maunu, Mirna Fernández Cervera, Orestes Darío López, Antonio Nogueira, Nilia de la Paz, Timo Hatanpää, Jouko Yliruusi, Jorge Fundora, Jyrki Heinämäki, Osmo Antikainen
Publikováno v:
Cervera, M F, Heinämäki, J, de la Paz, N, López, O, Maunu, S L, Virtanen, T, Hatanpää, T, Antikainen, O, Nogueira, A, Fundora, J & Yliruusi, J 2011, ' Effects of spray drying on physicochemical properties of chitosan acid salts. ', AAPS PharmSciTech, vol. 12, no. 2, pp. 637-649 . https://doi.org/10.1208/s12249-011-9620-3
The effects of spray-drying process and acidic solvent system on physicochemical properties of chitosan salts were investigated. Chitosan used in spray dryings was obtained by deacetylation of chitin from lobster (Panulirus argus) origin. The chitosa