Výsledky vyhledávání - "António J.A. Santos"

Akademický článek

Kappa Number Prediction of Acacia melanoxylon Unbleached Kraft Pulps using NIR-PLSR Models with a Narrow Interval of Variation

Autor: António J.A. Santos, Ofélia Anjos, Rogério Simões, José Rodrigues, Helena Pereira

Publikováno v: BioResources, Vol 9, Iss 4, Pp 6735-6744 (2014)

A total of 120 Acacia melanoxylon R. Br. (Australian blackwood) stem discs, belonging to 20 trees from four sites in Portugal, were used in this study. The samples were kraft pulped under standard identical conditions targeted to a Kappa number of 15

Externí odkaz: https://doaj.org/article/294b4b5312b64b1bb82c582005a05b5a

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FTIR–ATR spectroscopy applied to quality control of grape-derived spirits

Autor: Ilda Caldeira, António J.A. Santos, Leticia M. Estevinho, Ofélia Anjos

Publikováno v: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Agência para a Sociedade do Conhecimento (UMIC)-FCT-Sociedade da Informação
instacron:RCAAP
Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)

The Fourier transform infrared (FTIR) spectroscopic method with attenuated total reflectance (ATR) was used for predicting the alcoholic strength, the methanol, acetaldehyde and fusel alcohols content of grape-derived spirits. FTIR-ATR spectrum in th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e5065f9a873ff80c94e990118f7f05a1
https://doi.org/10.1016/j.foodchem.2016.02.128

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Physicochemical characterization of Lavandula spp. honey with FT-Raman spectroscopy

Autor: António J.A. Santos, Ofélia Anjos, Vasco Paixão, Leticia M. Estevinho

This study aimed to evaluate the potential of FT-Raman spectroscopy in the prediction of the chemical composition of Lavandula spp. monofloral honey. Partial Least Squares (PLS) regression models were performed for the quantitative estimation and the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fd5f3ae345f315d3e7274d002f3e4310

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Influence of Heartwood on Wood Density and Pulp Properties Explained by Machine Learning Techniques

Autor: António J.A. Santos, Carla Iglesias, Helena Pereira, Ofélia Anjos, Javier J. González Martínez

Publikováno v: Forests, Vol 8, Iss 1, p 20 (2017)
Forests; Volume 8; Issue 1; Pages: 20
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Agência para a Sociedade do Conhecimento (UMIC)-FCT-Sociedade da Informação
instacron:RCAAP
Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)

The aim of this work is to develop a tool to predict some pulp properties e.g., pulp yield, Kappa number, ISO brightness (ISO 2470:2008), fiber length and fiber width, using the sapwood and heartwood proportion in the raw-material. For this purpose,

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dc2bc23189eea7d7db588836a35a52c5
http://www.mdpi.com/1999-4907/8/1/20

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Aplicación de la espectroscopía FTIR-ATR a la caracterización del polen de abeja

Autor: António J.A. Santos, Leticia M. Estevinho, Teresa Dias, Ofélia Anjos

Publikováno v: Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Agência para a Sociedade do Conhecimento (UMIC)-FCT-Sociedade da Informação

Bee pollen contains almost all nutrients required by the human organism as well as diverse health-promoting substances. However, its composition and nutritional value greatly depend on the botanical origin. As such, it is important to develop a rapid

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f6cd4b5800afe0aa2604886e7d049eab

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Variation of wood density and mechanical properties of blackwood (Acacia melanoxylon R. Br.)

Autor: José S. Machado, Rogério Simões, Helena Pereira, José Carlos Rodrigues, Lina Nunes, José Luís Louzada, António J.A. Santos, Ofélia Anjos

Publikováno v: Materials & Design (1980-2015). 56:975-980

The variation of wood density and mechanical properties with site, tree and within tree (longitudinal and radial) were studied for blackwood (Acacia melanoxylon R. Br.) grown in four sites in Portugal. Twenty trees were randomly selected (40 cm dbh c

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::16ad98a9b084460b3ff6bd9d8adee893
https://doi.org/10.1016/j.matdes.2013.12.016

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Prediction of five softwood paper properties from its density using support vector machine regression techniques

Autor: Ofélia Anjos, Javier Martínez-Torres, Helena Pereira, Rogério Simões, António J.A. Santos, Esperanza García-Gonzalo, Paulino José García-Nieto

Publikováno v: Scopus
ResearcherID
RUO. Repositorio Institucional de la Universidad de Oviedo
instname
BioResources, Vol 11, Iss 1, Pp 1892-1904 (2016)
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Agência para a Sociedade do Conhecimento (UMIC)-FCT-Sociedade da Informação
instacron:RCAAP

Submitted by Maria Eduarda Pereira Rodrigues (erodrigues@ipcb.pt) on 2016-02-18T12:18:20Z No. of bitstreams: 1 BioRes_11_1_1892_GarciaGonzalo_SMPSGA_Prediction_Softwood_Paper_Props_Density_Regression_8080.pdf: 885317 bytes, checksum: a53ab4c4bcb77100

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3a6d58385113364070e55875fbc8a2ed
http://hdl.handle.net/10651/39802

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Estimation of Wood Basic Density of Acacia Melanoxylon (R. Br.) by near Infrared Spectroscopy

Autor: António J.A. Santos, Manfred Schwanninger, José Carlos Rodrigues, Helena Pereira, Rogério Simões, Ana Alves

Publikováno v: Journal of Near Infrared Spectroscopy. 20:267-274

Wood basic density is one of the most important wood quality properties and one of the simplest to assess but it is too time consuming to be really useful for the screening of populations or for improvement programmes where large numbers of samples n

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::26f55913b727990bdeb9a820680d1835
https://doi.org/10.1255/jnirs.986

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NIR PLSR model selection for Kappa number prediction of maritime pine Kraft pulps

Autor: Denilson Da Silva Perez, António J.A. Santos, Ana Alves, Helena Pereira, José Carlos Rodrigues, Manfred Schwanninger, Rogério Simões

Publikováno v: Wood Science and Technology. 41:491-499

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

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ec85ecb3027060bad3fc5af5491e1120
https://doi.org/10.1007/s00226-007-0130-0

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Fibre morphological characteristics of kraft pulps of Acacia melanoxylon estimated by NIR-PLS-R models

Autor: Helena Pereira, Ofélia Anjos, António J.A. Santos

Publikováno v: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Agência para a Sociedade do Conhecimento (UMIC)-FCT-Sociedade da Informação
instacron:RCAAP
Materials; Volume 9; Issue 1; Pages: 8
Materials, Vol 9, Iss 1, p 8 (2015)
Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
Materials

In this paper, the morphological properties of fiber length (weighted in length) and of fiber width of unbleached Kraft pulp of Acacia melanoxylon were determined using TECHPAP Morfi® equipment (Techpap SAS, Grenoble, France), and were used in the c

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::37bbc9c5eafc278732b075a7e984fd75

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