Results 171 to 180 of about 5,366 (209)

Reassessment of lipid composition of the diatom, Skeletonema costatum

Phytochemistry, 1995
In the present work, we questioned the natural or artifactual origin of the large amounts of free fatty acids recovered in lipids from the diatom Skeletonema costatum. Using rapid cell harvest and a very drastic method to extract the lipids, we demonstrated that these lipid patterns rich in free fatty acids were relevant to the degradation of complex ...
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Growth and biochemical responses of Skeletonema costatum to petroleum contamination

Journal of Applied Phycology, 2016
Clonal populations of the diatom Skeletonema costatum isolated from Lake Pontchartrain (Louisiana, USA) near the 2010 Deepwater Horizon oil release were exposed to uncontaminated f/2 medium or light slop oil emulsified (O-E; 25, 50, 75, 100 % of initial levels) in f/2 during short- (10 day) and long-term (21 day) incubations. During 10-day incubations,
James L. Wee, David F. Millie, Ngan K. Nguyen, Johnathan Patterson, Rose Ann Cattolico, David E. John, John H. Paul   +6 more
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Joint toxicity of microplastics with triclosan to marine microalgae Skeletonema costatum

Environmental Pollution, 2019
Toxicity of single microplastics on organisms has been reported widely, however, their joint toxicity with other contaminants on phytoplankton is rarely investigated. Here, we studied the toxicity of triclosan (TCS) with four kinds of microplastics namely polyethylene (PE, 74 μm), polystyrene (PS, 74 μm), polyvinyl chloride (PVC, 74 μm), and PVC800 (1 ...
Zhi-lin Zhu, Su-chun Wang, Fei-fei Zhao, Shu-guang Wang, Fei-fei Liu, Guang-zhou Liu   +5 more
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Intraspecific variations in the fatty acids of the diatom Skeletonema costatum

Phytochemistry, 1989
Abstract The fatty acid composition of triplicate cultures of four clones of the marine diatom Skeletonema costatum are reported. Variations in the percentage of individual components and in total acid concentrations are significantly different between clones from coastal, estuarine and oceanic locations.
Philip M. Shaw, Gary J. Jones, J.David Smith, R.B. Johns   +3 more
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Development of QSAR models for evaluating pesticide toxicity against Skeletonema costatum

Chemosphere, 2021
Nowadays, the emergence of pesticides and its application in agriculture greatly improved the crop quality and food production. However, the resulted ecological problem caused by the widespread pesticide residues attracted more and more attention since the pesticides were harmful to most living organisms.
Lu, Yang, Cuihong, Sang, Yinghuan, Wang, Wentao, Liu, Weiyu, Hao, Jing, Chang, Jianzhong, Li   +6 more
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Increased Production of Eicosapentaenoic Acid by Skeletonema costatum Cells After Decantation at Low Temperature

Biotechnology Letters, 1999
International audienceCoagulation of Skeletonema costatum biomass was induced at alkaline pH in enriched seawater to concentrate the microalgal suspensions by decantation. Incubation of the concentrated cultures at 15 • C after return at pH 7.5 preserved
Grizeau, Dominique, Blanchemain, Alice
exaly   +2 more sources

Development of microbial community during Skeletonema costatum detritus degradation

Hydrobiologia, 1997
Microbial degradation of algal detritus was studied experimentally using the diatom Skeletonema costatum prekilled culture as a substrate for the marine microbial community. The qualitative and quantitative changes in the microbial community and the algal detritus structure were followed during 11 days of incubation at the water temperature of 20 °C.
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Photoacclimation in the marine diatom Skeletonema costatum

Limnology and Oceanography, 2000
Photoacclimation 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, Hugh L. MacIntyre, Sandra M. Pratt, Pippa J. Sammes, Stuart Gibb, Richard J. Geider   +5 more
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Carbohydrate metabolism in the marine diatom Skeletonema costatum

Marine Biology, 1969
This 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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Characterization of the nitrate reductase activity in the diatom Skeletonema costatum

Plant Science Letters, 1978
Abstract 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, Jose M. Macarulla, Juan L. Serra   +2 more
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