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| Registros recuperados: 50 | |
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| Torres Ch., G.. |
| Se estima la productividad primaria en concentración de clorofila "a" y feopigmentos, como indicativo de la calidad del primer nivel trófico-fitoplancton, registrados en el Estrecho Bransfield, Bahía Chile (Noreste de la Isla Greenwich) y en el Paso Drake, durante la VII Expedición Ecuatoriana a la Antártida a bordo del B/I ORION durante el verano austral de 1998. La biomasa fitoplanctónica superficial de clrofila "a" en el Estrecho Bransfield, registró las mayores concentraciones (0.7-0-8 mg/m3) hacia el noreste del estrecho, y las menores concentraciones de 0.2 mg/m3 se localizaron hacia el centro. A nivel subsuperficial de los 20 m se registraron las más altas concentraciones de toda la columna de agua (0-100 m), con una distribution latitudinal casi... |
| Tipo: Journal Contribution |
Palavras-chave: Chlorophylls; Pigments; Biomass; Biological production; Phytoplankton; Polar waters; Pigments; Biomass; Biological production; Phytoplankton. |
| Ano: 1998 |
URL: http://hdl.handle.net/1834/3846 |
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| Cailliau, C; Belviso, S; Goutx, M; Bedo, A; Park, Y; Charriaud, E. |
| During summer 1994, the production regime at 2 sites located in the Indian sector of the Southern Ocean, one in the Permanent Open Ocean Zone (POOZ) at 52 degrees S, and a second in the Seasonal Ice Zone (SIZ) at 63 degrees S, was dominated by regeneration (0.3 < f-ratio < 0.4). Two time series, each of about 4 d, were performed over pre-determined time intervals of 4 h using a free-floating sediment trap set at 200 m at the 2 sites. Hourly variations of C, N, chlorophyll a (chl a) and its degradation products, taxon-specific pigments, lipid classes and dimethylsulfoniopropionate (DMSP) were measured simultaneously. Measurements in the water column were done during the sediment trap drifting. Fucoxanthin, a typical diatom pigment, was the major... |
| Tipo: Text |
Palavras-chave: Antarctic; Austral ocean; Sediment traps; Diel cycles; Phytoplankton; Pigments; Lipids; DMSP; DMS. |
| Ano: 1999 |
URL: https://archimer.ifremer.fr/doc/00240/35083/33651.pdf |
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| Shweta,Mishra; Agrawal,S.B.. |
| The impact of supplemental UV-B (sUV-B) radiation and heavy metals: Cd (68 µmol.kg-1 soil) and Ni (68 µmol.kg-1 soil) singly and in combination was studied on photosynthetic and non-photosynthetic pigments, metabolites, enzyme activities, biomass accumulation and the net primary productivity of spinach (Spinacia oleracea L. var. All Green), a common leafy vegetable plant. Both the stresses individually and in combination resulted in the reduction of photosynthetic pigments, ascorbic acid, and catalase activity, whereas a reverse trend was observed for anthocyanin, flavonoids and proline content, lipid peroxidation and peroxidase activity. The interactive effects of both the stresses were, however, less than additive. Combined treatment of sUV-B + Cd was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Spinaicia oleracea; Biomass; Cadmium; Enzymes; Nickel; Pigments; Ultraviolet-B. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202006000200007 |
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| Ayala-Astorga,Gloria Irma; Alcaraz-Meléndez,Lilia. |
| We evaluated the effects of saline stress on soluble proteins, lipid peroxidation (TBAR), chlorophyll a, chlorophyll b, β-carotene, violaxanthin, and proline in Paulownia imperialis and Paulownia fortunei plants grown in vitro. When the propagated plants reached a determined size, they were transferred aseptically to WPM culture medium containing different sodium chloride concentrations (0, 20, 40, 60, 80, and 160 mM) and were sampled at 15 and 30 days. Proline content was determined at 30 days after transfer only. Protein concentration significantly decreased with the highest salt levels in P. imperialis compared to controls in which no sodium chloride was added. In both P. imperialis and P. fortunei, lipid peroxidation significantly increased at... |
| Tipo: Journal article |
Palavras-chave: Paulownia fortunei; Paulownia imperialis; Pigments; Proline; Proteins; Salinity; TBARS; Tissue culture. |
| Ano: 2010 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582010000500013 |
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| Registros recuperados: 50 | |
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