Биотехнология

Activated sludge rheology: A critical review on data collection and modelling

N. Ratkovich a,b,*, W. Horn c, F.P. Helmus c, S. Rosenberger c, W. Naessens d, I. Nopens d, T.R. Bentzen a a Aalborg University, Department of Civil Engineering, Sohngaardsholmsvej 57, DK-9000 Aalborg, Denmark b University of Los Andes, Department of Chemical Engineering, Cra 1 No. 18A-12, Bogota, Colombia c Osnabru ¨ck University of Applied Sciences, Faculty of Engineering and Computer Science, P.O. Box 1940, 49009 Osnabru ¨ck, Germany d Ghent University, BIOMATH, Department of Mathematical Modelling, Statistics and Bioinformatics, Coupure Links 653, B-9000 Ghent, Belgium

Guest Editorial A Report from the 2005 Japanese -- European

Workshop on Cellulose and Functional Polysaccharides This issue of CELLULOSE is dedicated to contributions from the latest Japanese –European workshop entitled Cellulose and Functional Polysaccharides, which was held on September 12 –14, 2005 in Vienna, Austria. The workshop series, which was started in 1994, is a reflection of the long-standing tradition, and the deep roots, which exist in Europe and Japan in cellulose science. This science covers all aspects of the biology, chemistry, physics and material properties of cellulose and related polysaccharides. The focus on cellulose and

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Influence of protective agents for preservation of Gluconacetobacter xylinus on its cellulose production

Cornelia Wiegand and Dieter Klemm* Institute of Organic Chemistry and Macromolecular Chemistry, Friedrich Schiller University Jena, Humboldtstrasse 10, Jena, D-07743, Germany; *Author for correspondence (e-mail: Dieter.Klemm@ uni-jena.de; fax: +49-3641-948202) Received 10 October 2005; accepted in revised form 14 November 2005 Key words: Bacterial cellulose, DMSO, Gelatine, Gluconacetobacter xylinus, Glycerol, Preservation, Skim milk Abstract Gluconacetobacter xylinus produces extracellularly cellulose under aerobic conditions. The formed bacterial

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Mechanistic studies on cationic ring-opening polymerisation of cyclodextrin derivatives using various Lewis acids

Andreas Bo¨ sch1, Manfred Nimtz2 and Petra Mischnick1,* 1Technical University Braunschweig, Institute of Food Chemistry, Schleinitzstr. 20, D-38106, Braunschweig, Germany; 2German Research Center for Biotechnology, GBF, Mascheroder Weg 1, D-38124, Braunschweig, Germany; *Author for correspondence (e-mail: p.mischnick@tu-bs.de; phone: +49-531-391-7201; fax: +49- 531-391-7230) Received 7 October 2005; accepted in revised form 28 November 2005 Key words: Block-copolymer, Cationic ring-opening polymerisation, Cyclodextrin derivatives, 1H NMR spectroscopy, Lewis acid, Macromonomers Abstract

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Chemo-enzymatic synthesis of novel oligo-N-acetyllactosamine derivatives having a b(1-4) –b(1-6) repeating unit by using transition state analogue substrate

Shin-ichiro Shoda1,*, Yoshinori Misawa1, Yousuke Nishijima1, Yukiko Tawata1, Tomohiko Kotake1, Masato Noguchi1, Atsushi Kobayashi1 and Takeshi Watanabe2 1Department of Biomolecular Engineering, Tohoku University, 6-6-11-514, Aoba, Aoba-ku, Sendai, 980-8579, Japan; 2Department of Applied Biological Chemistry, Faculty of Agriculture, Niigata University, 8050 Ikarashi-2, Niigata, 950-2181, Japan; *Author for correspondence (e-mail: shoda@poly.che.tohoku.ac.jp) Received 10 October 2005; accepted in revised form 2 March 2006

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Analysis of the substituent distribution in the glucosyl units and along the polymer chain of hydroxypropylmethyl celluloses and statistical evaluation

Roland Adden, Romy Mu¨ ller and Petra Mischnick* Institut fu¨r Lebensmittelchemie, TU Braunschweig, Schleinitzstr. 20, D-38106, Braunschweig, Germany; *Author for correspondence (e-mail: p.mischnick@tu-bs.de; phone: +49-531-391-7201; fax: +49-531-391- 7230) Received 7 October 2005; accepted in revised form 28 November 2005 Key words: Cellulose ether, Hydroxypropylmethyl cellulose, Mass spectrometry, Substituent pattern in the polymer chain Abstract Three hydroxypropylmethyl celluloses (HPMC 1, 2, 3; DSMe=2.06, 1.99, 2.04; MSHP=0.21, 0.19, 0.21)

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Studies on pre-hump and main fractions of cellulose-2,5-acetate in acetone

Bodo Saake1,*, Martin Zenker1, Armin Stein2 and Ju ¨ rgen Puls1 1Institut fu¨r Holzchemie und chemische Technologie des Holzes, Bundesforschungsanstalt fu¨r Forst- und Holzwirtschaft, Leuschnerstr. 91, D-21031 Hamburg, Germany; 2Rhodia Actow GmbH, Engesserstraße 8, D-79108 Freiburg, Germany; *Author for correspondence (e-mail: b.saake@holz.uni-hamburg.de) Received 10 October 2005; accepted in revised form 21 November 2005 Key words: Cellulose acetate, Hemicellulose, Molar mass, Pre-hump, Size exclusion chromatography Abstract

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Synthesis of diblock copolymers with cellulose derivatives. 3. Cellulose derivatives carrying a single pyrene group at the reducing-end and fluorescent studies of their self-assembly systems in aqueous NaOH solutions

Yukiko Enomoto1, Hiroshi Kamitakahara1,*, Toshiyuki Takano1 and Fumiaki Nakatsubo1 1Division of Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University, Kitashirakawaoiwake-cho, Sakyo-ku, Kyoto, 606-8502, Japan; *Author for correspondence (e-mail: hkamitan@kais.kyoto-u.ac.jp; phone: +81-75-753-6255; fax: +81-75-753-6300) Received 7 April 2005; accepted in revised form 17 June 2005 Key words: Diblock copolymer, Excimer emission; IE/IM, Fluorescent probe technique, Hydrophobic interaction, Monomer emission, Pyrene, Reducing-end, Self-assembly Abstract

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A novel approach to determination of carbonyl groups in DMAc/LiCl-insoluble pulps by fluorescence labeling

Mirjana Kostic1, Antje Potthast1,*, Thomas Rosenau1, Paul Kosma1 and Herbert Sixta2 1Christian-Doppler-Laboratory, University of Natural Resources and Applied Life Sciences (BOKU), Muthgasse 18, A – 1190, Vienna, Austria; 2R&D, Lenzing AG, 4860, Lenzing, Austria; *Author for correspondence (e-mail: antje.potthast@boku.ac.at; phone: +43-1-36006-6071; fax: +43-1-36006-6059) Received 18 October 2005; accepted in revised form 12 December 2005 Key words: Carbonyl group determination, CCOA method, Cellulose, DMAc/LiCl, Fluorescence labeling, Hydrolysis, Pulp Abstract

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Visualisation of the fibrillar and pore morphology of cellulosic fibres applying transmission electron microscopy

Mohammad Abu-Rous1, Elisabeth Ingolic2 and Kurt Christian Schuster3,* 1Christian Doppler-Laboratory of Fibre and Textile Chemistry in Cellulosics, Institute of Texile Chemistry and Textile Physics, Leopold-Franzens-University Innsbruck, Hoechsterstrasse 73, A-6850, Dornbirn, Austria; 2Research Institute for Electron Microscopy (FELMI), Technical University of Graz, A-8010, Graz, Austria; 3Textile Innovation, Lenzing AG, A-4860, Lenzing, Austria; *Author for correspondence (e-mail: c.schuster@lenzing.com; phone: +34-7672-701-3081)

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