Listar por autor "Abalde, Julio"
Mostrando ítems 41-56 de 56
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Production and analysis of secondary carotenoids in green algae
Orosa García, Miguel; Torres, Enrique; Abalde, Julio; Fidalgo Paredes, Pablo (Springer, 2000-10)The microalgae Neochloris wimmeri, Scenedesmus vacuolatus, Scotiellopsis oocystiformis, Chlorella zofingiensis and Protosiphon botryoides were grown under secondary carotenoid inductive conditions. The results indicate ... -
Purification and characterization of phycocyanin from the marine cyanobacterium Synechococcus sp. IO9201
Abalde, Julio; Betancourt, Liliana; Torres, Enrique; Cid, Ángeles; Barwell, Clive (Elsevier, 1998-08-07)This paper describes a suitable method for the optimum extraction and isolation of phycocyanin from the cyanobacterium Synechococcus sp. IO9201 isolated from Caribbean waters. Phycocyanin from this microorganism was purified ... -
Rapid assay for the analysis of class III metallothioneins by capillary zone electrophoresis in crude extracts of microalgal cells exposed to cadmium
Torres, Enrique; Cid, Ángeles; Fidalgo Paredes, Pablo; Abalde, Julio (Elsevier, 1997-07-18)An optimization strategy for the separation and analysis of class III metallothioneins from a complex matrix by capillary zone electrophoresis (CZE) is presented and illustrated. Metallothioneins are a group of polypeptides ... -
Removal of cadmium ions by the marine diatom Phaeodactylum tricornutum Bohlin accumulation and long-term kinetics of uptake
Torres, Enrique; Cid, Ángeles; Herrero, Concepción; Abalde, Julio (Elsevier, 1998-03)The marine diatom Phaeodactylum tricornutum Bohlin was exposed to different cadmium concentrations (1–100 mg l−1) for 4 days. The amount of cadmium removed was recorded, with particular attention paid to long-term uptake ... -
Response of the marine microalga Dunaliella tertiolecta (Chlorophyceae) to copper toxicity in short time experiments
Abalde, Julio; Cid, Ángeles; Reiriz, S.; Torres, Enrique; Herrero, Concepción (Springer, 1995-02)Heavy metals are introduced into aquatic ecosystems from industrial wastes, agricultural runoff and mining activities. The toxicity of heavy metal ions in solution to microalgae is well known. The essentiality and toxicity ... -
Response of the Marine Microalga Dunaliella tertiolecta to Nutrient Concentration and Salinity Variations in Batch Cultures
Fábregas, Jaime; Herrero, Concepción; Cabezas, Buenaventura; Liaño, Rosa; Abalde, Julio (Gustav Fisher Verlag, 1986)The marine microalga Dunaliella tertiolecta is known for its ability to tolerate a wide range of salt concentrations. Cultures were grown under 56 different nutrient concentration-salinity conditions. Optimal growth ... -
Sorption isotherm studies of Cd(II) ions using living cells of the marine microalga Tetraselmis suecica (Kylin) Butch
Pérez Rama, Mónica; Torres, Enrique; Suárez, Cristina; Herrero, Concepción; Abalde, Julio (2010-10)[Abstract]The present work reports the use of living cells of the marine microalga Tetraselmis suecica for the biosorption of cadmium ions. For a better understanding of the biosorption characteristics, three fractions of ... -
Sulphate, more than a nutrient, protects the microalga Chlamydomonas moewusii from cadmium toxicity
Mera, Roi; Torres, Enrique; Abalde, Julio (Elsevier, 2014-03)Sulphur is an essential macroelement that plays important roles in living organisms. The thiol rich sulphur compounds, such as cysteine, γ-Glu–Cys, glutathione and phytochelatins participate in the tolerance mechanisms ... -
The marine microalga Chlorella stigmatophora as a potential source of single cell protein: Enhancement of the protein content in response to nutrient enrichment
Fábregas, Jaime; Herrero, Concepción; Abalde, Julio; Cabezas, Buenaventura (Elsevier, 1986)Mass cultures of Chlorella stigmatophora were carried out in order to obtain maximum protein production and to study the chemical variations in function of the nutrient concentration. Cultures reached maximum cellular ... -
Tolerance and detoxification mechanisms in marine diatom Phaeodactylum tricornutum exposed to cadmium
Torres, Enrique; Cid, Ángeles; Fidalgo Paredes, Pablo; Herrero, Concepción; Abalde, Julio (Springer, 1995)Tolerance is one of the most important mechanisms for survival. Organisms living in polluted environments with heavy metals develop tolerance to these contaminants; this tolerance has been attributed to the ability to ... -
Toxic action of copper on the membrane system of a marine diatom measured by flow cytometry
Cid, Ángeles; Fidalgo Paredes, Pablo; Herrero, Concepción; Abalde, Julio (WILEY-Liss, 1996-09)Flow cytometric measurements were used to investigate the toxic action of copper on some Phaeodactylum tricornutum membrane systems. Throughout the time of metal exposure, the percentage of viable cells decreased as copper ... -
Use of the Comet Assay to Evaluate Pesticide Toxicity on Non-Target Microalgae
Prado, Raquel; García Díaz, Rosa; Rioboo, Carmen; Abalde, Julio; Herrero, Concepción; Cid, Ángeles (Nova Science Publishers, 2009)Aquatic environments are often contaminated with numerous organic and inorganic compounds. More than 90% of the applied load of pesticides is dispersed in the environment, reaching non-target species of these aquatic ... -
Variations in planktonic bacterial biomass and production, and phytoplankton blooms off A Coruña (NW Spain)
Valencia, Joaquín; Abalde, Julio; Bode, Antonio; Cid, Ángeles; Fernández, Emilio; González, Nicolás; Lorenzo, Jorge; Teira, Eva; Varela, Manuel (CSIC, 2003)[Abstract] Bacterial abundance, biomass and heterotrophic activity, along with hydrographic and phytoplankton variables, were measured from February 1998 to September 1999 at two coastal stations off A Coruña (Galicia, ... -
Variations in the biochemical profile of the marine microalga Dunaliella tertiolecta (Butcher) cultured with different nutrient concentrations and urea as a nitrogen source
Herrero, Concepción; Abalde, Julio; Cid, Ángeles; Fidalgo Paredes, Pablo; Fábregas, Jaime (Station Biologique de Roscoff, 1994)[Abstract] Variations in the biochemical profile of the marine microalga Dunaliella tertiolecta (Butcher) cultured with different nutrient concentrations and urea as a nitrogen source. Cultures of the marine microalga ... -
Yields in biomass and chemical constituents of four commercially important marine microalgae with different culture media
Herrero, Concepción; Cid, Ángeles; Fábregas, Jaime; Abalde, Julio (Elsevier, 1991)The use of the commercial nutrient Algal-1 was studied in mass cultures of the marine microalgaeTetraselmis suecica, Dunaliella tertiolecta, Isochrysis galbana and Phaeodactylum tricornutum, in comparison with the use of ... -
β-carotene, vitamin C and vitamin E content of the marine microalga Dunaliella tertiolecta cultured with different nitrogen sources
Herrero, Concepción; Abalde, Julio; Fábregas, Jaime (Elsevier, 1991)Variations in the β-carotene, vitamin C and vitamin E content of D. tertiolecta have been shown to result from the nitrogen source used in the culture medium. Differences of 101%, 38% and 69% have been found in β-carotene, ...