Results 181 to 190 of about 2,495 (215)
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Carbohydrate metabolism in the marine diatom Skeletonema costatum
Marine Biology, 1969This is a study on the metabolism of the algal biochemical constituents of a marine diatom, Skeletonema costatum. The carbohydrates, protein, and lipid, of the diatom grown under light and dark conditions were analyzed. The composition of the organic compounds did not vary in the alga grown under continuous light conditions throughout the experiment ...
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Photoacclimation in the marine diatom Skeletonema costatum
Limnology and Oceanography, 2000Photoacclimation was examined in the marine diatom Skeletonema costatum, which was subjected to reciprocal shifts between irradiances of 50 (low‐light) and 1,200 (high‐light) µmol photons m−2 s−1. Cell chlorophyll a and fucoxanthin contents were higher but diadinoxanthin and diatoxanthin contents lower in cells grown at 50 µmol photons m−2 s−1 than in ...
Tracy Anning +5 more
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Science of The Total Environment, 2023
The effects of nutrient phosphate (P) at environmentally relevant levels on the toxicity of arsenic (As) in marine microalgae have been rarely known. In the present study, we explored the toxicity and bioaccumulation of As in a globally distributed diatom species Skeletonema costatum at different ambient P concentrations.
Qunhuan, Ma, Lizhao, Chen, Li, Zhang
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The effects of nutrient phosphate (P) at environmentally relevant levels on the toxicity of arsenic (As) in marine microalgae have been rarely known. In the present study, we explored the toxicity and bioaccumulation of As in a globally distributed diatom species Skeletonema costatum at different ambient P concentrations.
Qunhuan, Ma, Lizhao, Chen, Li, Zhang
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Characterization of the nitrate reductase activity in the diatom Skeletonema costatum
Plant Science Letters, 1978Abstract Ferrodoxin-nitrate reductase (EC.1.7.7.1) activity has been characterized in the soluble fraction of crude extracts of the marine centric diatom Skeletonema costatum. The adaptive enzyme was more ammonium-repressible than nitrate (or nitrate)-inducible. Nitrate was stoicheimetrically reduced to ammonium with reduced methyl violegen being the
Maria J. Llama +2 more
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An industrial photosynthetic system for Skeletonema costatum in arid regions
Journal of Applied Phycology, 1999A biocultivator has been developed for large-scale production in arid regions using the diatom Skeletonema costatum. The product is used for the larviculture of aquaculturally important marine food organisms. This system was operated in India with a total solar collection area of 560 m2. Operating under a batch regime, this slow-mixing open reactor has
M.R. Kitto +2 more
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Roles of carbonic anhydrase in photosynthesis of Skeletonema costatum.
Zhi wu sheng li yu fen zi sheng wu xue xue bao = Journal of plant physiology and molecular biology, 2005The role of carbonic anhydrase (CA) in photosynthesis of the marine diatom Skeletonema costatum grown at ambient level of CO(2) was investigated. Extracellular CA activity was very low. In comparison, intracellular CA activity was great part of total CA activity.
Chen, X. W., Gao, K. S.
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Nutrient-controlled growth of Skeletonema costatum: an applied model
Chinese Journal of Oceanology and Limnology, 2014To model Skeletonema costatum blooms and their relationship with environmental parameters in situ, a S. costatum-specific zero-dimensional box model based on the mechanistic model Eco3M was established using physiological features. The parameters were calibrated using experimental counterparts, and simulations were compared with published laboratory ...
Ke Sun +3 more
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Effects of lead on growth of the marine diatom Skeletonema costatum
Marine Biology, 1979The growth rate and maximum yield of Skeletonema costatum (Grev.) Cleve in batch culture were inhibited by dissolved lead at concentrations of 0.05 to 10.0 μg Pb l-1. Growth rate, maximum yield, and respiration cell-1 decreased and photosynthesis cell-1 and cell volume increased in response to increased lead concentration in the medium.
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Inhibitory effects of Skeletonema costatum on mercury methylation by Geobacter sulfurreducens PCA
Chemosphere, 2019Algae and mercury (Hg) are ubiquitous in marine environments. In this study, we investigated the effects of a typical marine algae of diatom Skeletonema costatum on Hg methylation by an iron-reducing bacterium of Geobacter sulfurreducens (G. sulfurreducens) PCA. In the absence of Skeletonema costatum, the bacterial MeHg production rate maximized at 104.
Ling-Yun, Ding +7 more
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Aquatic Toxicology, 2002
Physiological and cytological responses of the marine diatom, Skeletonema costatum, to 2,4-dichlorophenol (2,4-DCP) were investigated after exposing algal cultures to 1-6 mg x l(-1) of 2,4-DCP for 96 h. Growth rate of the diatom was significantly reduced by 2,4-DCP at and above 3.0 mg x l(-1) while other biological parameters such as photosynthetic and
Yang, S, Kong, RYC, Wu, RSS
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Physiological and cytological responses of the marine diatom, Skeletonema costatum, to 2,4-dichlorophenol (2,4-DCP) were investigated after exposing algal cultures to 1-6 mg x l(-1) of 2,4-DCP for 96 h. Growth rate of the diatom was significantly reduced by 2,4-DCP at and above 3.0 mg x l(-1) while other biological parameters such as photosynthetic and
Yang, S, Kong, RYC, Wu, RSS
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