Results 241 to 250 of about 310,828 (287)

Kinetics and mechanism of kappa number determination

Nordic Pulp & Paper Research Journal, 1998
The kinetics and mechanism involved in the kappa number determination have been studied using a spectrophotometric method to monitor the oxidation of pine kraft pulp as well as of model compounds f ...
Jiebing Li, Göran Gellerstedt
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On the structural significance of the kappa number measurement

Nordic Pulp & Paper Research Journal, 1998
The structural significance of a kappa number has been studied by quantifying the permanganate consumption of various isolated pine, birch and poplar lignins, of lignin model compounds and of carbo ...
Jiebing Li, Göran Gellerstedt
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Oxymercuration-demercuration kappa number:

Nordic Pulp & Paper Research Journal, 2002
In the kappa number determination, it has been found that non-lignin structures contribute to the consumption of permanganate, and thus make it difficult to estimate the lignin content in the pulp.
Jiebing Li, Göran Gellerstedt
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Target Kappa Number for AS/AQ Pulping of Wheat Straw

Advanced Materials Research, 2011
Alkaline sulfite/anthraquinone (AS/AQ) pulping of wheat straw under different conditions was conducted in this study. A transition point of kappa number at approximately 6.5 was observed based on all experimental results. This transition point can be regarded as the phase transfer point in AS/AQ pulping from bulk to residual delignification.
Jing Liu, Katsuya Nagata
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Oxygen Delignification of Bamboo Kraft Pulp with High Kappa Number

Advanced Materials Research, 2011
Bamboo kraft pulp with Kappa number of 25.6 was sampled, and oxygen delignification was applied to bleach these bamboo pulp samples. By investigating yield, Kappa number, viscosity, brightness of pulp, and delignification selectivity, it has been proven that caustic soda dosage and reaction temperature were major factors for oxygen delignification. The
Hui Gao, Huai Yu Zhan
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Dependence of Weighted Kappa Coefficients on the Number of Categories

Epidemiology, 1996
Weighted kappa coefficients are commonly used to quantify inter- or intra-rater reliability or test-retest reliability of ordinal ratings in clinical and epidemiologic applications. In this paper, we assess the dependence of weighted kappa coefficients on the number of categories and the type of weighting scheme, which vary between applications.
H, Brenner, U, Kliebsch
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The disagreeable behaviour of the kappa statistic

Pharmaceutical Statistics, 2015
It is often of interest to measure the agreement between a number of raters when an outcome is nominal or ordinal. The kappa statistic is used as a measure of agreement. The statistic is highly sensitive to the distribution of the marginal totals and can
Laura Flight, Steven A Julious
exaly   +2 more sources

PREDICTION AND CONTROL OF BLOW-LINE KAPPA NUMBER

IFAC Proceedings Volumes, 2005
Abstract Two industrial continuous cooking processes producing both softwood and hardwood pulp were studied. Real time kappa number profiles of conventional and Downflow Lo-Solids cooking were modelled. Gustafson's kappa number model with optimised parameters was used. Blow-line kappa numbers were successfully predicted before cooking zone. New kappa
Rami Rantanen, Timo Ahvenlampi, Manne Tervaskanto, Urpo Kortela, Aki Korhonen   +4 more
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Initial estimates for certain subclasses of bi-univalent functions with $$\kappa $$-Fibonacci numbers

Afrika Matematika, 2023
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Nanjundan Magesh, Jodalli Nirmala, Jagadeesan Yamini, Sondekola Rudra Swamy   +3 more
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