caa a22 4500 463216601 CHVBK 20180405153158.0 cr unu---uuuuu 170326e20070801xx s 000 0 eng 10.1007/s00226-007-0130-0 doi (NATIONALLICENCE)springer-10.1007/s00226-007-0130-0 NIR PLSR model selection for Kappa number prediction of maritime pine Kraft pulps [Elektronische Daten] [Ana Alves, António Santos, Denilson da Silva Perez, José Rodrigues, Helena Pereira, Rogério Simões, Manfred Schwanninger] A total of 910 maritime pine (Pinus pinaster Aiton) wood discs, belonging to a genetic trial of 80 families with 11-12 trees per family, were used in this study. A near infrared (NIR) partial least squares regression (PLSR) model for the prediction of Kappa number of Pinus pinaster Aiton pulps obtained from samples pulped under identical conditions was calculated. Very good correlations between NIR spectra of maritime pine pulps and Kappa numbers in the range from 58 to 100 were obtained. Besides the raw spectra, spectra pre-processed with ten methods were used for PLS analysis (cross validation with 57 samples), showing that even after test set validation (with 34 samples) no model decision could be made due to almost identical statistics. The final evaluation that proved the predictive power of the models by predicting pulps with unknown Kappa numbers allowed choosing a model according to a minimal number of outliers found during this process. The minimum-maximum normalized spectra in the wave number range from 6,110 to 5,440cm−1 used for the calculation gave the best model with a root mean square error of prediction of 2.3 units of Kappa number, a coefficient of determination of 95.9%, and one PLS component. The percentage of outliers during evaluation was 0.9%. Springer-Verlag, 2007 Alves Ana Centro de Estudos Florestais, Instituto Superior de Agronomia, Universidade Técnica de Lisboa, Tapada da Ajuda, 1349-017, Lisboa, Portugal aut Santos António Centro de Estudos Florestais, Instituto Superior de Agronomia, Universidade Técnica de Lisboa, Tapada da Ajuda, 1349-017, Lisboa, Portugal aut da Silva Perez Denilson Laboratoire Bois Process, Afocel, Domaine Universitaire, BP 251, 38044, Grenoble Cedex, France aut Rodrigues José Centro de Estudos Florestais, Instituto Superior de Agronomia, Universidade Técnica de Lisboa, Tapada da Ajuda, 1349-017, Lisboa, Portugal aut Pereira Helena Centro de Estudos Florestais, Instituto Superior de Agronomia, Universidade Técnica de Lisboa, Tapada da Ajuda, 1349-017, Lisboa, Portugal aut Simões Rogério Research Unit of Textile and Paper Materials, Universidade da Beira Interior, 6201-001, Covilhã, Portugal aut Schwanninger Manfred Department of Chemistry, BOKU-University of Natural Resources and Applied Life Sciences, Vienna, Muthgasse 18, 1190, Vienna, Austria aut Wood Science and Technology Springer-Verlag 41/6(2007-08-01), 491-499 0043-7719 41:6<491 2007 41 226 https://doi.org/10.1007/s00226-007-0130-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00226-007-0130-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Alves Ana Centro de Estudos Florestais, Instituto Superior de Agronomia, Universidade Técnica de Lisboa, Tapada da Ajuda, 1349-017, Lisboa, Portugal aut NATIONALLICENCE 700 1- Santos António Centro de Estudos Florestais, Instituto Superior de Agronomia, Universidade Técnica de Lisboa, Tapada da Ajuda, 1349-017, Lisboa, Portugal aut NATIONALLICENCE 700 1- da Silva Perez Denilson Laboratoire Bois Process, Afocel, Domaine Universitaire, BP 251, 38044, Grenoble Cedex, France aut NATIONALLICENCE 700 1- Rodrigues José Centro de Estudos Florestais, Instituto Superior de Agronomia, Universidade Técnica de Lisboa, Tapada da Ajuda, 1349-017, Lisboa, Portugal aut NATIONALLICENCE 700 1- Pereira Helena Centro de Estudos Florestais, Instituto Superior de Agronomia, Universidade Técnica de Lisboa, Tapada da Ajuda, 1349-017, Lisboa, Portugal aut NATIONALLICENCE 700 1- Simões Rogério Research Unit of Textile and Paper Materials, Universidade da Beira Interior, 6201-001, Covilhã, Portugal aut NATIONALLICENCE 700 1- Schwanninger Manfred Department of Chemistry, BOKU-University of Natural Resources and Applied Life Sciences, Vienna, Muthgasse 18, 1190, Vienna, Austria aut NATIONALLICENCE 773 0- Wood Science and Technology Springer-Verlag 41/6(2007-08-01), 491-499 0043-7719 41:6<491 2007 41 226 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer