[PDF] Top 20 Desarrollo del pensamiento y lenguaje variacional, una mirada socioepistemológica
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Role of Tween 80 in biobleaching of unbleached hardwood kraft pulp with manganese peroxidase
... Despite the fact that MnP activity decreased similarly with each MnP treat- ment, the residual MnP activities in the presence of sur- factants were always higher[r] ... See full document
9
Studies on hypersaline-tolerant white-rot fungi III: biobleaching of unbleached kraft pulp by hypersaline-tolerant manganese peroxidase from a marine white rot isolate, Phlebia sp. MG-60
... Preparation of crude enzyme. A liquid culture medium was monitored for enzyme production; it contained glucose 10 g/l, ammonium tartrate 0.221 g/l, sodium acetate 20 mM, Tween 80 1.0 g/l, Kirk’s trace ... See full document
32
Biobleaching of unbleached and oxygen-bleached hardwood kraft pulp by culture filtrate containing manganese peroxidase and lignin peroxidase fromPhanerochaete chrysosporium
... Changes in brightness of a unbleached (UKP) and b oxygen- bleached (OKP) hardwood kraft pulp after treatment with culture filtrate from P.. chrysosporium with glucose and[r] ... See full document
68
Alkali Extraction of Kraft Pulp Fibers: Influence on Fiber and Fluff Pulp Properties
... Fiber properties were analysed with a Kajaani FS300. Fibers from the pulp sheets and fibers from dry defibrated pulp sheets were analysed. In the analysis procedure, the fibers were suspended in a water ... See full document
13
MICROEMULSIONS AS ANTIDIABETIC DRUG DELIVERY SYSTEMS
... in Tween 20, Tween 80, and Span 80 were close and this may be due to the nonionic nature of these surfactants, however the solubility of the drug in Tween 80 is considered ... See full document
17
Refining to overcome effects of drying unbleached Kraft fibers in the presence or absence of sugar
... for pulp having no addi- tional refining after it was dried (zero PFI revolutions), dry- ing of untreated fiber caused the breaking length of subsequent paper to decline to ... See full document
16
Dewatering of refined, bleached hardwood kraft pulp by gravity, vacuum, and centrifugation with applied pressure. Part 1. Physical and ionic effects
... Foi empregado urn teste modificado de valor de retencao de agua (MWRV - modified water retention value).. com pressao aplicada para umedecer plugues de fibras du rante sua [r] ... See full document
8
Na-Tpp Cross-Linked Chitosan Microspheres for Controlled Release Of Tramadol Hydrochloride
... (tween 80) was found to play an important role in controlling the particle size of the ...the tween concentration increased from ...the tween concentration produced bigger particles. ... See full document
64
Effects of sugar addition before drying on the wet flexibility of redispersed kraft fibres
... Since the 1960’s there has been increasing interest in factors responsible for the loss of inter-fiber bonding ability when chemical pulps, such as kraft or sulfite, are dried and then resuspended in water [1-7]. ... See full document
19
Sulfuric acid bleaching of kraft pulp II: Behavior of lignin and carbohydrate during sulfuric acid bleaching
... Two lignin samples were prepared from the effluents gained after both beech kraft pulp bleaching and red pine kraft pulp bleaching: One is acid lignin, which was pr[r] ... See full document
104
Behavioural analysis of a nonionic detergent in the kraft pulp washing process using cryo-time-of-flight secondary ion mass spectrometry and cryo-scanning electron microscopy
... Paper making is one of the most developed methods for the usage of sustainable wood biomass. Although the paper making industry has been growing globally for a long time, the process still needs to be improved, such as ... See full document
52
Biobleaching of textile dye effluent by bacterial lignin peroxidase
... for biobleaching of textile dye based effluents showed significant colour ...lignin peroxidase treated effluent than in raw ...lignin peroxidase in the treatment of effluents before ... See full document
8
Factors limiting oxygen delignification of kraft pulp
... pâte kraft et qui proviennent de réactions d’ouverture de cycles des dibenzodioxocines et; (ii) l’accumulation de structures p-hydroxyphényles qui sont beaucoup moins ... See full document
24
Design of Lignin Sensor for Identification of Paper Grades for an Automatic Waste Paper SortingSystem.
... The pulp types are mechanical pulp, bleached sulfate pulp and unbleached sulfate ...the pulp which gives the strongest fluorescence for one wavelength gives the weakest fluorescence for ... See full document
58
Bacteria in Indian Food Packaging Papers and Paperboards with Various Contents of Pulp Fiber
... The bacterial contamination of Indian food packaging PPBs with various con- tent of pulp fiber was investigated. Our findings showed that from the 10 tested food packaging PPBs, bacteria was present in all the ... See full document
21
TCF bleaching of eucalypt kraft pulp with oxone
... of unbleached kraft eucalypt pulp was undertaken prior to bleaching with oxone because of its effec- tiveness in producing pulps of high brightness and low kappa number (21- ... See full document
12
Dewatering of refined, bleached hardwood kraft pulp by gravity, vacuum, and centrifugation with applied pressure. Part 2. Effects of wet-end additives
... Para substanciar algumas das ideias que se acabou de mencionar, foram efetuados testes suplementares para ava liar quanta de PEl modificado e poli-DADMAC de massa [r] ... See full document
13
Importance of cellulosic fines relative to the dewatering rates of fiber suspensions
... The test results reported in Fig. 8 help to show the effect of fiber flexibility. Though, in terms of the fines content, the tests were identical to those reported in Fig. 6, the fiber fraction had been extensively ... See full document
10
Application of peroxymonosulfuric acid as a modification of the totally chlorine-free bleaching of acacia wood prehydrolysis-kraft pulp
... decreasing pulp viscosity is an indicator of carbo- hydrate degradation in the ...harming pulp strength properties, and could therefore be used in TCF bleaching without reducing pulp ...investigate ... See full document
9
Sulfuric acid bleaching of kraft pulp 1: Bleaching of hardwood and softwood kraft pulps
... Because the main reac- tions of the acetic acid pulping are ether cleavage reactions, the result shows that the residual lignin in oxygen-bleached kraft pulp contains appreciabl[r] ... See full document
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