Results 1 to 10 of about 719,903 (196)

NIRS Characterization of Paper Pulps to Predict Kappa Number [PDF]

Journal of Spectroscopy, 2015
Rice is one of the most abundant food crops in the world and its straw stands as an important source of fibres both from an economic and an environmental point of view.
Ana Moral, Elena Cabeza, Roberto Aguado, Antonio Tijero   +3 more
doaj   +4 more sources

A CORRELATION BETWEEN THE KAPPA NUMBER AND THE VENTORIM INDEX IN THE BLEACHING PROCESS [PDF]

Revista Árvore
The determination of the kappa number in the bleaching process is typically conducted with a pulp quantity between 3 and 4 grams, allowing for the calculation of values above four. However, after the oxidative extraction stage with hydrogen peroxide, the
Vitor Hideyoshi Hayashida Ribeiro, Evelyn Eduarda Gil dos Santos, Fabiana Clara Cezar Alves, Marianne Vitória Gil dos Santos, Higor Rogério Favarim, Gustavo Ventorim   +5 more
doaj   +4 more sources

The Effect of H-Factor on Kappa Number and Viscosity in Continuous Digester [PDF]

CHEESA, 2023
One of the most important steps in pulping is the cooking process, which serves to separate the cellulose and hemicellulose from lignin and other by-products.
Rizka Wulandari Putri, Rahmatullah Rahmatullah, Faisal Siagian   +2 more
doaj   +2 more sources

Impact of impregnation on high kappa number hardwood pulps

BioResources, 2011
Mixed US southern hardwood chips were impregnated and cooked under various conditions in the laboratory. Kappa numbers between 15 and 55 were obtained. The reject content, kappa number, and yield were studied as a function of time, temperature, and alkali charge in the cooking.
Peter W. Hart, Gary W. Colson, Stefan Antonsson, Anders Hjort   +3 more
openaire   +2 more sources

The number of L_{infty,kappa}-equivalent non-isomorphic models for kappa weakly compact [PDF]

, 1999
For a cardinal kappa and a model M of cardinality kappa let No(M) denote the number of non-isomorphic models of cardinality kappa which are L_{infty,kappa}--equivalent to M. In [Sh:133] Shelah established that when kappa is a weakly compact cardinal and mu<=kappa is a nonzero cardinal, there exists a model M of cardinality kappa with No(M)=mu.
Shelah, Saharon, Väisänen, Pauli
openaire   +4 more sources

Effect of Kappa Number Variation on Modified Pulping of Eucalyptus

BioResources, 2016
This work evaluated the impact of brownstock pulp kappa number variations on modified pulping process, oxygen delignification, bleaching, and the physical characteristics on bleached pulp.
Tiago Edson Simkunas Segura, Juliana Rodrigues Siviero dos Santos, Camila Sarto, Francides Gomes da Silva Jr   +3 more
doaj   +2 more sources

The impact of kappa number composition on eucalyptus kraft pulp bleachability [PDF]

Brazilian Journal of Chemical Engineering, 2007
Consumption of chemicals during ECF bleaching of kraft pulp correlates reasonably well with kappa number, which measures with KMnO4 the total amount of oxidizable material in the pulp. However, the method does not distinguish between the oxidizable material in residual lignin and other structures susceptible to oxidation, such as hexenuronic acids ...
Costa, M. M., Colodette, J. L.
openaire   +5 more sources

Improvement of Pulping Uniformity by Measurement of Single Fiber Kappa Number [PDF]

, 2001
A method to measure the kappa of single fibers by staining with a fluorescent dye, Acridine Orange (AO), has been developed. This method is now applied to develop and automated flow-through instrument that permits routine kappa analysis on thousands of images of AO stained fibers to give the fiber kappa number distribution of a pulp sample in a few ...
Gustafson, Richard R., Callis, James B.
openaire   +4 more sources

Effect of magnetic field on the charge and thermal transport properties of hot and dense QCD matter

European Physical Journal C: Particles and Fields, 2020
We have studied the effect of strong magnetic field on the charge and thermal transport properties of hot QCD matter at finite chemical potential. For this purpose, we have calculated the electrical conductivity ($$\sigma _\mathrm{el}$$ σel ) and the ...
Shubhalaxmi Rath, Binoy Krishna Patra
doaj   +3 more sources

Effect of the number of non-conforming samples on the Kappa indicator values [PDF]

MATEC Web of Conferences, 2018
Evaluate the quality of this measurement system is possible by using multiple methods, which are described in the methodology guides for evaluation of the measurement system quality.
Klaput Pavel, Vykydal David
doaj   +2 more sources