Listar GI-Microalgae - Artigos por título
Mostrando ítems 60-79 de 87
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Physiological response of freshwater microalga (Chlorella vulgaris) to triazine and phenylurea herbicides
(2002-09)[Abstract]The effects of two herbicides used wide-spread, isoproturon (phenylurea) and terbutryn (triazine), on growth, dry weight, elemental composition, photosynthetic pigments and protein content, and cell volume assayed ... -
Plankton carbon budget in a coastal wind-driven upwelling station off A Coruña (NW Iberian Peninsula)
(Inter-Research, 2003)Seasonal variations in phytoplankton and bacterial biomass along with rates of primary production, dissolved organic carbon (DOC) release, bacterial production, dark respiration and vertical particle flux were determined ... -
Population growth study of the rotifer Brachionus sp. fed with triazine-exposed microalgae
(2007-08)[Abstract]Few data exist on potential toxic effects that pollutants may have on zooplankton fed microalgae exposed to pesticides. For that reason, microalgal cultures were exposed to different concentrations of the triazine ... -
Potential use of flow cytometry in toxicity studies with microalgae
(2000-03)[Abstract]Cytotoxic effects of aquatic pollutants on microalgae are very heterogeneous, and they are influenced by environmental conditions and the test species. Stress produced by copper or paraquat addition to the culture ... -
Production and analysis of secondary carotenoids in green algae
(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
(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
(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
(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 ... -
Removal of triazine herbicides from freshwater systems using photosynthetic microorganisms
(2006-11)[Abstract]The uptake of the triazine herbicides, atrazine and terbutryn, was determined for two freshwater photosynthetic microorganisms, the green microalga Chlorella vulgaris and the cyanobacterium Synechococcus elongatus. ... -
Response of the marine microalga Dunaliella tertiolecta (Chlorophyceae) to copper toxicity in short time experiments
(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
(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 ... -
Riboflavin enrichment throughout the food chain from the marine microalga Tetraselmis suecica to the rotifer Brachionus plicatilis and to White Sea Bream (Diplodus sargus) and Gilthead Sea bream (Sparus aurata) larvae
(2008-10)[Abstract]The riboflavin enrichment of the marine microalga Tetraselmis suecica and the transfer of this vitamin to higher trophic levels of the aquatic food chain such as the rotifer Brachionus plicatilis and the larvae ... -
Screening acute cytotoxicity biomarkers using a microalga as test organism
(Elsevier, 2012-12)The present study checked the suitability of the integration of flow cytometry (FCM) as technique and a freshwater microalga (Chlamydomonas moewusii) as cell system model for ecotoxicological studies, looking for sensitive ... -
Sorption isotherm studies of Cd(II) ions using living cells of the marine microalga Tetraselmis suecica (Kylin) Butch
(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 ... -
Suitability of cytotoxicity endpoints and test microalgal species to disclose the toxic effect of common aquatic pollutants
(Elsevier, 2015-04)Pulse discharges of chemicals to aquatic environments may lead to high concentrations of them in surface waters for short periods of time, but enough to induce toxic effects on aquatic organisms; however, no many methods ... -
Sulphate, more than a nutrient, protects the microalga Chlamydomonas moewusii from cadmium toxicity
(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 herbicide paraquat induces alterations in the elemental and biochemical composition of non-target microalgal species
(2009-09)[Abstract]Huge quantities of pesticides are dispersed in the environment, affecting non-target organisms. Since paraquat affects the photosynthetic process, the biochemical composition of affected species should be altered. ... -
The marine microalga Chlorella stigmatophora as a potential source of single cell protein: Enhancement of the protein content in response to nutrient enrichment
(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
(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 ...