Recursos de colección

Digital.CSIC (162.855 recursos)

Repositorio institucional del Consejo Superior de Investigaciones Científicas. Digital.CSIC es un depósito de documentos digitales, cuyo objetivo es organizar, archivar, preservar y difundir en modo de acceso abierto la producción intelectual resultante de la actividad investigadora del CSIC.

(IRNAS) Artículos post-print

Mostrando recursos 1 - 20 de 20

  1. No-tillage permanent bed planting and controlled traffic in a maize-cotton irrigated system under Mediterranean conditions: Effects on soil compaction, crop performance and carbon sequestration

    Cid, Patricio; Carmona Moreno, I.; Murillo Carpio, José Manuel; Gómez Macpherson, H.
    11 páginas.-- 8 figuras.-- 2 tablas.-- 66 referencias

  2. Physiological and gene expression responses of sunflower (Helianthus annuus L.) plants differ according to irrigation placement

    Aguado, Ana; Capote, Nieves; Romero, Fernando; Dodd, Ian C.; Colmenero Flores, José M.
    8 páginas.-- 4 figuras.-- 4 tablas.-- 60 referencias

  3. Enzymatic degradation of Elephant grass (Pennisetum purpureum) stems: Influence of the pith and bark in the total hydrolysis

    Pérez-Boada, Marta; Prieto, Alicia; Prinsen, Pepijn; Forquin-Gomez, Marie-Pierre; Río Andrade, José Carlos del; Gutiérrez Suárez, Ana; Martínez, Ángel T.; Faulds, Craig B.
    28 p.-1 tab.-4 fig.

  4. Enzymatic removal of free and conjugated sterols forming pitch deposits in environmentally sound bleaching of eucalypt paper pulp

    Gutiérrez Suárez, Ana; Río Andrade, José Carlos del; Ibarra, David; Rencoret, Jorge; Romero Sánchez, Javier; Speranza, Mariela; Camarero, Susana; Martínez, María Jesús; Martínez, Ángel T.
    Instituto de Recursos Naturales y Agrobiología, CSIC, PO Box 1052, E-41080, Seville, Spain; Centro de Investigaciones Biológicas, CSIC, Ramiro de Maeztu 9, E-28040 Madrid, Spain; CIT, ENCE, Carretera de Campañó s/n, E-36157 Ribeiro Vao, Pontevedra, Spain

  5. Highly acylated (acetylated and/or p-coumaroylated) native lignins from diverse herbaceous plants

    Río Andrade, José Carlos del; Rencoret, Jorge; Marques, Gisela; Gutiérrez Suárez, Ana; Ibarra, David; Santos, José Ignacio; Jiménez-Barbero, Jesús; Zhang, L.; Martínez, Ángel T.
    The structure of lignins isolated from the herbaceous plants sisal (Agave sisalana), kenaf (Hibiscus cannabinus), abaca (Musa textilis) and curaua (Ananas erectifolius) has been studied upon spectroscopic (2D-NMR) and chemical degradative (Derivatization Followed by Reductive Cleavage) methods. The analyses demonstrate that the structure of the lignins from these plants is highly remarkable, being extensively acylated at the γ-carbon of the lignin side-chain (up to 80% acylation) with acetate and/or p-coumarate groups, and preferentially over syringyl units. While the lignins from sisal and kenaf are γ-acylated exclusively with acetate groups, the lignins from abaca and curaua are esterified with acetate and...

  6. HSQC-NMR analysis of lignin in woody (Eucalyptus globulus and Picea abies) and non-woody (Agave sisalana) ball-milled plant materials at the gel state

    Rencoret, Jorge; Marques, Gisela; Gutiérrez Suárez, Ana; Nieto, Lidia; Santos, José Ignacio; Jiménez-Barbero, Jesús; Martínez, Ángel T.; Río Andrade, José Carlos del
    8 páginas, 2 tablas, 2 figuras.

  7. A passive repression mechanism that hinders synergic transcriptional activation by heat shock factors involved in sunflower seed longevity

    Tejedor-Cano, Javier; Carranco, Raúl; Personat, José María; Prieto-Dapena, P.; Almoguera, Concepción; Espinosa-Vázquez, José Manuel; Jordano, Juan
    Different genetic programs that are active during late stages of zygotic embryogenesis are involved in seed phenotypes as longevity, basal thermotolerance, and desiccation tolerance. In sunflower, Heat Shock Factor A9 (HaHSFA9) controls one of such programs, the HaHSFA9 program. Overexpression of HaHSFA9 in seeds of transgenic tobacco showed the involvement of this transcription factor in basal thermotolerance and longevity; HaHSFA9 activated a genetic program that includes specific small Heat Shock Protein (sHSP) genes, which are expressed mainly (or exclusively) during zygotic embryogenesis in seeds (Prieto-Dapena et al., 2006). We also used an active-repressor dominant-negative (DN) form of HaHSFA9, and thus we obtained a substantial reduction of both the accumulation of...

  8. P-hydroxyphenyl:guaiacyl:syringyl ratio of lignin in some austral hardwoods estimated by CuO-oxidation and solid-state NMR

    Martínez, Ángel T.; González Becerra, Aldo E.; Prieto, Alicia; González-Vila, Francisco Javier; Fründ, R.
    6 pages, 3 figures, 4 tables, 32 references.

  9. Study of the lipidic and humic fractions from organic wastes before and after the composting process

    García Izquierdo, Carlos; Hernández Fernández, María Teresa; Costa, F.; Río Andrade, José Carlos del
    10 pages, 3 figures, 5 tables, 16 references. 1) Centro de Edafología y Biología Aplicada del Segura, Apartado 195, 30080, Murcia (Spain) 2) Instituto de Recursos Naturales y Agrobiología, Apartado 1052, 41080 Sevilla (Spain)

  10. Enzymatic grafting of simple phenols into flax and sisal pulp fibres using laccases

    Aracri, Elisabetta; Fillat, Amanda; Colom, J.; Gutiérrez Suárez, Ana; Río Andrade, José Carlos del; Martínez, Ángel T.; Vidal, Teresa
    1Textile and Paper Engineering Department. ETSEIAT. Universitat Politècnica de Catalunya. Colom 11. E-08222 Terrassa, Spain 2Instituto de Recursos Naturales y Agrobiología de Sevilla, CSIC, P.O. Box 1052. E-41080 Seville, Spain 3Centro de Investigaciones Biológicas, CSIC, Ramiro de Maeztu 9. E-28040 Madrid, Spain

  11. Delignification of eucalypt kraft pulp with manganese-substituted polyoxometalate assisted by fungal versatile peroxidase

    Marques, Gisela; Gamelas, José A. F.; Ruiz-Dueñas, F. J.; Río Andrade, José Carlos del; Evtuguin, Dmitry V.; Martínez, Ángel T.; Gutiérrez Suárez, Ana
    a)Instituto de Recursos Naturales y Agrobiología de Sevilla, CSIC, PO Box 1052, E-41080 Seville, Spain b)University of Aveiro, CICECO, 3810-193, Aveiro, Portugal c)Centro de Investigaciones Biológicas, CSIC, Ramiro de Maeztu 9, E-28040 Madrid

  12. Hydrolysis of sterol esters by an esterase from Ophiostoma piceae: Application for pitch control in pulping of Eucalyptus globulus wood

    Calero-Rueda, Olga; Gutiérrez Suárez, Ana; Río Andrade, José Carlos del; Prieto, Alicia; Plou Gasca, Francisco José; Ballesteros Olmo, Antonio; Martínez, Ángel T.; Martínez, María Jesús
    1Centro de Investigaciones Biológicas, CSIC, Ramiro de Maeztu 9, E-28040 Madrid, Spain; 2Instituto de Recursos Naturales y Agrobiología, CSIC, Reina Mercedes 10, PO Box 1052, E-41080, Seville, Spain; 3Instituto de Catálisis, CSIC, Cantoblanco, E-28049 Madrid, Spain.

  13. A land evaluation decision support system (MicroLEIS DSS) for agricultural soil protection with special reference to the Mediterranean region

    Rosa, Diego de la; Mayol Rodríguez, Francisco; Díaz Pereira, Elvira; Fernández Díaz, Miguel; Rosa Bonsón, Diego de la
    14 pages, 5 figures, 5 tables, 45 references.The MicroLEIS decision support system has been developed, during the past 14 years, mainly by the authors of this paper, with the collaboration of many contributing and former authors who are listed on the website.

  14. Composition of non-woody plant lignins and cinnamic acids by Py-GC/MS, Py/TMAH and FT-IR

    Río Andrade, José Carlos del; Gutiérrez Suárez, Ana; Rodríguez García, María I.; Ibarra, David; Martínez, Ángel T.
    1Instituto de Recursos Naturales y Agrobiología de Sevilla, CSIC, P.O. Box 1052, E-41080-Seville, Spain; 2Centro de Investigaciones Biológicas, CSIC, Ramiro de Maeztu 9, E-28040-Madrid, Spain E-mail address: delrio@irnase.csic.es

  15. Enzymatic delignification of plant cell wall: from nature to mill

    Martínez, Ángel T.; Ruiz-Dueñas, F. J.; Martínez, María Jesús; Río Andrade, José Carlos del; Gutiérrez Suárez, Ana
    Lignin removal is a central issue in paper pulp manufacture, and production of other renewable chemicals, materials, and biofuels in future lignocellulose biorefineries. Biotechnology can contribute to more efficient and environmentally sound deconstruction of plant cell wall by providing tailor-made biocatalysts based on the oxidative enzymes responsible for lignin attack in Nature. With this purpose, the already-known ligninolytic oxidoreductases are being improved using (rational and random-based) protein engineering, and still unknown enzymes will be identified by the application of the different ‘omics’ technologies. Enzymatic delignification will be soon at the pulp mill (combined with pitch removal) and our understanding of the...

  16. Use of organosmectites to reduce leaching losses of acidic herbicides

    Carrizosa, M. J.; Hermosín, M.C.; Koskinen, W. C.; Cornejo, J.
    The modification of smectitic clays with organic cations via cation-exchange reactions produces sorbents with an increased sorption capacity for organic compounds such as acidic herbicides. These organoclays (OCIs) could be used as carriers in controlled release formulations of herbicides to decrease their contamination potential. Various OCIs and two acidic herbicides (bentazone [3-isopropyl-1H-2,1,3-benzothiadiazin-4 (3H) one 2,2-dioxide] and dicamba [2-methoxy-3,6-dichlorobenzoic acid]) were selected and herbicide-OCI complexes were prepared by either sorbing the herbicides on the OCI from solution or by dry mixing of both components. Those preparations were assayed as controlled-release formulations under static (water solution) and dynamic (soil column leaching) conditions....

  17. The laser-induced discoloration of stonework; a comparative study on its origins and remedies

    Pouli, P.; Fotakis, C.; Hermosín, Bernardo; Sáiz-Jiménez, Cesáreo; Domingo, Concepción; Oujja, M.; Castillejo, Marta
    14 pages, 11 figures.-- PMID: 18396096 [PubMed].-- Printed version published on Dec 2008.

  18. Fungal degradation of lipophilic extractives in Eucalyptus globulus wood.

    Gutiérrez Suárez, Ana; Río Andrade, José Carlos del; Martínez, María Jesús; Martínez, Ángel T.
    Solid-state fermentation of eucalypt wood with several fungal strains was investigated as a possible biological pretreatment for decreasing the content of compounds responsible for pitch deposition during Cl2-free manufacture of paper pulp. First, different pitch deposits were characterized by gas chromatography (GC) and GC-mass spectrometry (MS). The chemical species identified arose from lipophilic wood extractives that survived the pulping and bleaching processes. Second, a detailed GC-MS analysis of the lipophilic fraction after fungal treatment of wood was carried out, and different degradation patterns were observed. The results showed that some basidiomycetes that decreased the lipophilic fraction also released significant amounts...

  19. Chemical characterization of the lipophilic fraction of Giant reed (Arundo donax) fibres used for pulp and paper manufacturing

    Coelho, Dora; Marques, Gisela; Gutiérrez Suárez, Ana; Silvestre, Armando R.D.; Río Andrade, José Carlos del
    The chemical composition of lipophilic extractives from Arundo donax stems (including nodes and internodes), used for pulp and papermaking, was studied. The lipid fraction was extracted with acetone and redissolved in chloroform, and then fractionated by solid-phase extraction (SPE) on aminopropyl-phase cartridges into four different fractions of increasing polarity. The total lipid extract and the resulting fractions were analysed by gas chromatography and gas chromatography-mass spectrometry, using short- and medium-length high-temperature capillary columns, respectively. The main compounds identified in the fibres included series of long-chain n-fatty acids, n-alkanes, n-aldehydes, n-alcohols, monoglycerides, free and esterified sterols and triterpenols, steryl glucosides, steroid...

  20. Biodegradation of lignocellulosics: microbial, chemical, and enzymatic aspects of the fungal attack of lignin

    Martínez, Ángel T.; Speranza, Mariela; Ruiz-Dueñas, F. J.; Ferreira, Patricia; Camarero, Susana; Guillén, Francisco; Martínez, María Jesús; Gutiérrez Suárez, Ana; Río Andrade, José Carlos del
    Wood is the main renewable material on Earth and is largely used as building material and in paper-pulp manufacturing. This review describes the composition of lignocellulosic materials, the different processes by which fungi are able to alter wood, including decay patterns caused by white, brown, and soft-rot fungi, and fungal staining of wood. The chemical, enzymatic, and molecular aspects of the fungal attack of lignin, which represents the key step in wood decay, are also discussed. Modern analytical techniques to investigate fungal degradation and modification of the lignin polymer are reviewed, as are the different oxidative enzymes (oxidoreductases) involved in...

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