This study is the first comprehensive investigation of enzyme-producing bacteria isolated from four sludge samples (primary, secondary, press and machine) collected in a Kraft paper mill. Overall, 41 strains encompassing 11 different genera were identified by 16S rRNA gene analysis and biochemical testing. Both biodiversity and enzymatic activities were correlated with sludge composition. Press...

Service 424 Latest Publications You Should Not Miss Kraft, K. (Rostock) Gesellschaftsmitteilungen 427 Schweizerische Medizinische Gesellschaft für Phytotherapie (SMGP) 430 News/Ticker 431 Tagungen und Kongresse 374 Impressum 435 Inhalt Band 21, 2014 401 Quality and Safety of Chinese Medicine Drugs in Germany – an Update Hempen, N.; Huber, R. (Freiburg i.Br.) Essay 413 An Approach to the Concept...

The effects of multiple xylanase treatments were assessed during the peroxide bleaching of three pulps: Douglas-fir (kraft); Western hemlock (oxygen delignified kraft); and trembling Aspen (kraft). The addition of a xylanase treatment stage, either before or after the peroxide bleaching stage(s), resulted in the enhanced brightening of all pulps. A higher brightness was achieved using two enzym...

In this work, a xylanase-producing strain, Streptomyces griseorubens LH-3, was cultured, and the crude xylanase was prepared. Analysis of its enzymatic properties revealed that the crude xylanase possessed good thermal stability at temperatures below 60 o C, exhibited a wide pH range from 4.0 to 9.0, and was cellulase-free. This crude enzyme was used to treat eucalyptus kraft pulp, and the rele...

The kraft process is applied to wood chips for separation of lignin from the polysaccharides within lignocellulose for pulp that will produce a high quality paper. Black liquor is a pulping waste generated by the kraft process that has potential for downstream bioconversion. However, the recalcitrant nature of the lignocellulose resources, its chemical derivatives that constitute the majority o...

Re-polymerization reactions are a commonly reported issue on the way to higher recovery of monomers from lignin. The reactivity obtained lignin depolymerization and their contribution re-polymerization in supercritical water (SCW) was investigated. Sulfonated Kraft (SKL) used along with four monomers: vanillin, vanillic acid, vanillyl alcohol acetovanillone. Indulin also employed as reference u...

nanofibrillated cellulose fibers were produced from unbleached kraft pulp of kenaf bast fiber. air dried and vacuum filtrated films of cellulose nanofibers were produced and their density and tensile properties were investigated. kenaf bast fiber unbleached kraft pulp has good potential for production of cellulose nanofibers by microfluidizer; so that the use of kenaf bast fiber unbleached kraf...

BACKGROUND Lignin is a complex polymer which inhibits the enzymatic conversion of cellulose to glucose in lignocellulose biomass for biofuel production. Cellulase enzymes irreversibly bind to lignin, deactivating the enzyme and lowering the overall activity of the hydrolyzing reaction solution. Within this study, atomic force microscopy (AFM) is used to compare the adhesion forces between cellu...