Raul Albuquerque Sardinha | University of Lisbon (original) (raw)

Raul Albuquerque Sardinha

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Papers by Raul Albuquerque Sardinha

Research paper thumbnail of High-pressure delignification of Eucalyptus Wood by 1,4-Dioxane-CO2 Mixtures

The Journal of Supercritical Fluids, 1994

... Pereira, H.; Sardinha, R. Appita1984,37, 661. Paszner,L.; Cho, HJ Tappi J. 1989, 72, 135. Li,... more ... Pereira, H.; Sardinha, R. Appita1984,37, 661. Paszner,L.; Cho, HJ Tappi J. 1989, 72, 135. Li, L.; Kiran, E. Tappi J. 1989, 72, 183. References. (1). L. Li and E. Kiran. Ind. Eng. Chem. Res. 27 (1988), p. 1301. Full Text via CrossRef | View Record in Scopus | Cited By in Scopus (20). ...

Research paper thumbnail of Classificação das Cortiças para a Produção de Rolha, Recorrendo a um Critério Objectivo: Parte II - Os Provetes (Os Quadros)

Silva Lusitana, Dec 1, 2005

ABSTRACT

Research paper thumbnail of A mortalidade dos sobreiros e a seca

Research paper thumbnail of Genetic Characterization of Quercus suber L.: 1. Preliminary Detection of Histone Promoter Variabilities

Research paper thumbnail of High Pressure Carbon Dioxide Extraction from Coriander Plants. Headspace Analysis

Journal of Essential Oil Research, 1993

Dried coriander plants were examined by headspace gas chromatographic analysis. Volatile concentr... more Dried coriander plants were examined by headspace gas chromatographic analysis. Volatile concentrates of the same plants were obtained by three different methods: steam distillation, extraction with liquid CO2 (at 20°C, 5.7 MPa) and extraction with supercritical CO2 (at 34.5°C, 16 MPa). Yields between 0.6–1.0% were obtained in the extraction by liquid CO2 and yields of 0.3% were obtained by steam

Research paper thumbnail of Deforestation or regrowth? A quantification of forest extension in the Miombo of Angola for the period 1990–2000

Research paper thumbnail of Spatial dynamics and quantification of deforestation in the central-plateau woodlands of Angola (1990–2009)

Research paper thumbnail of Classificação das Cortiças para a Produção de Rolha, Recorrendo a um Critério Objectivo. Parte III - As Rolhas

Silva Lusitana, Jun 1, 2006

Research paper thumbnail of Characterisation of Residues and Extracts of High-Pressure Extraction of Eucalyptus Wood with 1,4-Dioxane-CO 2 Mixtures. Part II. Determination of Macromolecular Parameters of Lignins Extracted with High-Pressure 1,4-Dioxane

Research paper thumbnail of Chemical composition of Eucalyptus globulus lab

Research paper thumbnail of Gestão de Terras Áridas Combatendo a Desertificação com o Desenvolvimento

Silva Lusitana, Jun 1, 2008

Research paper thumbnail of Reproducible and expedite classification criterion to foresee which cork strips will give good stoppers of natural cork

Research paper thumbnail of Classificação das Cortiças para a Produção de Rolha, Recorrendo a um Critério Objectivo. Parte I – As Rabanadas Classification of Cork Oaks for the Production of Cork, Appealing to an Objective Criterion. Part I – The Cork Strips

Research paper thumbnail of Dryland Management and Combating Desertification Through Development

Silva Lusitana, Jun 1, 2008

Research paper thumbnail of Feasibility of automatic detection of knots in maritime pine timber by acousto-ultrasonic scanning

Wood Science and Technology, 2004

Page 1. ORIGINAL Jose´ Saporiti Machado Æ Rau´l Albuquerque Sardinha Helena Pires Cruz Feasibilit... more Page 1. ORIGINAL Jose´ Saporiti Machado Æ Rau´l Albuquerque Sardinha Helena Pires Cruz Feasibility of automatic detection of knots in maritime pine timber by acousto-ultrasonic scanning Received: 27 August 2001 / Published online: 8 June 2004 Ó Springer-Verlag 2004 ...

Research paper thumbnail of High pressure CO2 extraction from geranium plants

The headspace of fresh and dried geranium plants were compared with those of extracts obtained by... more The headspace of fresh and dried geranium plants were compared with those of extracts obtained by three different methods: liquid extraction (21°C, 56.5 bar), supercritical (34.5°C, 160 bar) CO2 extraction, and steam distillation. The difference in aroma of the CO2 extracts and of the steam distillate is due to quantitative differences in the composition of these two. A trend of

Research paper thumbnail of High-pressure delignification of Eucalyptus Wood by 1,4-Dioxane-CO2 Mixtures

The Journal of Supercritical Fluids, 1994

... Pereira, H.; Sardinha, R. Appita1984,37, 661. Paszner,L.; Cho, HJ Tappi J. 1989, 72, 135. Li,... more ... Pereira, H.; Sardinha, R. Appita1984,37, 661. Paszner,L.; Cho, HJ Tappi J. 1989, 72, 135. Li, L.; Kiran, E. Tappi J. 1989, 72, 183. References. (1). L. Li and E. Kiran. Ind. Eng. Chem. Res. 27 (1988), p. 1301. Full Text via CrossRef | View Record in Scopus | Cited By in Scopus (20). ...

Research paper thumbnail of Classificação das Cortiças para a Produção de Rolha, Recorrendo a um Critério Objectivo: Parte II - Os Provetes (Os Quadros)

Silva Lusitana, Dec 1, 2005

ABSTRACT

Research paper thumbnail of A mortalidade dos sobreiros e a seca

Research paper thumbnail of Genetic Characterization of Quercus suber L.: 1. Preliminary Detection of Histone Promoter Variabilities

Research paper thumbnail of High Pressure Carbon Dioxide Extraction from Coriander Plants. Headspace Analysis

Journal of Essential Oil Research, 1993

Dried coriander plants were examined by headspace gas chromatographic analysis. Volatile concentr... more Dried coriander plants were examined by headspace gas chromatographic analysis. Volatile concentrates of the same plants were obtained by three different methods: steam distillation, extraction with liquid CO2 (at 20°C, 5.7 MPa) and extraction with supercritical CO2 (at 34.5°C, 16 MPa). Yields between 0.6–1.0% were obtained in the extraction by liquid CO2 and yields of 0.3% were obtained by steam

Research paper thumbnail of Deforestation or regrowth? A quantification of forest extension in the Miombo of Angola for the period 1990–2000

Research paper thumbnail of Spatial dynamics and quantification of deforestation in the central-plateau woodlands of Angola (1990–2009)

Research paper thumbnail of Classificação das Cortiças para a Produção de Rolha, Recorrendo a um Critério Objectivo. Parte III - As Rolhas

Silva Lusitana, Jun 1, 2006

Research paper thumbnail of Characterisation of Residues and Extracts of High-Pressure Extraction of Eucalyptus Wood with 1,4-Dioxane-CO 2 Mixtures. Part II. Determination of Macromolecular Parameters of Lignins Extracted with High-Pressure 1,4-Dioxane

Research paper thumbnail of Chemical composition of Eucalyptus globulus lab

Research paper thumbnail of Gestão de Terras Áridas Combatendo a Desertificação com o Desenvolvimento

Silva Lusitana, Jun 1, 2008

Research paper thumbnail of Reproducible and expedite classification criterion to foresee which cork strips will give good stoppers of natural cork

Research paper thumbnail of Classificação das Cortiças para a Produção de Rolha, Recorrendo a um Critério Objectivo. Parte I – As Rabanadas Classification of Cork Oaks for the Production of Cork, Appealing to an Objective Criterion. Part I – The Cork Strips

Research paper thumbnail of Dryland Management and Combating Desertification Through Development

Silva Lusitana, Jun 1, 2008

Research paper thumbnail of Feasibility of automatic detection of knots in maritime pine timber by acousto-ultrasonic scanning

Wood Science and Technology, 2004

Page 1. ORIGINAL Jose´ Saporiti Machado Æ Rau´l Albuquerque Sardinha Helena Pires Cruz Feasibilit... more Page 1. ORIGINAL Jose´ Saporiti Machado Æ Rau´l Albuquerque Sardinha Helena Pires Cruz Feasibility of automatic detection of knots in maritime pine timber by acousto-ultrasonic scanning Received: 27 August 2001 / Published online: 8 June 2004 Ó Springer-Verlag 2004 ...

Research paper thumbnail of High pressure CO2 extraction from geranium plants

The headspace of fresh and dried geranium plants were compared with those of extracts obtained by... more The headspace of fresh and dried geranium plants were compared with those of extracts obtained by three different methods: liquid extraction (21°C, 56.5 bar), supercritical (34.5°C, 160 bar) CO2 extraction, and steam distillation. The difference in aroma of the CO2 extracts and of the steam distillate is due to quantitative differences in the composition of these two. A trend of

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