Results 181 to 190 of about 719,923 (216)

The contribution to kappa number from hexeneuronic acid groups in pulp xylan

Carbohydrate Research, 1997
The kappa number of chemical pulps is widely used both in mill operation and in laboratory work as a measure of the degree of delignification in pulping, oxygen delignification, and prebleaching.
Jiebing Li, Göran Gellerstedt
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Effects of mu, kappa and sigma opioids on fixed consecutive number responding in rats

Pharmacology Biochemistry and Behavior, 1987
Responding in rats was maintained under a fixed consecutive number 20 schedule. Under this schedule, at least 20 consecutive responses were required on one lever before a response on a second lever produced food. Morphine, buprenorphine, ethylketocyclazocine (ECK), N-allylnormetazocine (NANM) and d-cyclazocine all caused dose-dependent decreases in ...
M E, Bronson, J M, Moerschbaecher
openaire   +2 more sources

Model-based computer control of Kappa number in magnefite pulp cooking

Proceedings of IEEE International Conference on Control and Applications CCA-94, 1994
The aim of this contribution is to present a model-based system for Kappa control in batch pulp cooking. Kappa is one of the parameters that reflect quality of the pulp. In order to keep the quality uniform, Kappa value at the end of the batch should dissipate as little as possible.
openaire   +1 more source

Control of continuous digester kappa number using generalized model predictive control

TAPPI Journal
Kappa number variability at the digester impacts pulp yield, physical strength properties, and lignin content for downstream delignification processing. Regulation of the digester kappa number is therefore of great importance to the pulp and paper industry.
WESLEY GILBERT, BRUCE ALLISON
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Estimation and Control of the Kappa Number in a Pulp Cooking Process

IFAC Proceedings Volumes, 1991
Abstract Proper selection of cooking times is one of the most important decision making tasks in batch pulp cooking. Duration of a batch depends on cooking conditions and must be chosen so that the Kappa number - a measure for pulp quality - reaches the desired value at the end of the batch.
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Does the kappa number method accurately reflect lignin content in nonwood pulps?

TAPPI Journal, 2018
The traditional kappa number method was developed in 1960 as a way to more quickly determine the level of lignin remaining in a completed or in-progress pulp. A significantly faster approach than the Klason lignin procedure, the kappa number method is based on the reaction of a strong oxidizing agent (KMnO4) with lignin and small amounts of other ...
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Some Binomial Sums of \(\kappa\)-Jacobsthal and \(\kappa\)-Jacobsthal-Lucas Numbers

Communications in Mathematics and Applications, 2023
openaire   +1 more source

Model based control of the kappa number in the pulp cooking process

[1991 Proceedings] 6th Mediterranean Electrotechnical Conference, 2002
Due to the lack of appropriate industrial sensors for online Kappa measurements, Kappa can be determined only after a batch is over by means of analysis in the laboratory. In view of this, a model-based system is developed with the purpose of estimating and controlling Kappa online.
openaire   +1 more source

The Kappa Coefficient of Agreement for Multiple Observers When the Number of Subjects is Small

Biometrics, 1986
Published results on the use of the kappa coefficient of agreement have traditionally been concerned with situations where a large number of subjects is classified by a small group of raters. The coefficient is then used to assess the degree of agreement among the raters through hypothesis testing or confidence intervals.
openaire   +3 more sources

Cancer treatment and survivorship statistics, 2022

Ca-A Cancer Journal for Clinicians, 2022
Kimberly D Miller, Leticia M Nogueira, Angela B Mariotto   +2 more
exaly