Results 171 to 180 of about 2,495 (215)

Production of Octadienal in the Marine Diatom Skeletonema costatum

Organic Letters, 2003
[reaction: see text] Marine diatoms produce alpha,beta,gamma,delta-unsaturated aldehydes that have detrimental effects on the reproduction of their natural predators. The production of these defensive metabolites is suggested to involve enzymatic oxidation of polyunsaturated fatty acids. In this paper, feeding experiments with labeled precursor provide
D'IPPOLITO GIULIANA, ROMANO GIOVANNA, CARUSO, Tonino, SPINELLA, Aldo, CIMINO GUIDO, FONTANA ANGELO   +5 more
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Effects of hypoxia on growth of the diatom Skeletonema costatum

Journal of Experimental Marine Biology and Ecology, 2012
Abstract Hypoxia, defined as dissolved oxygen falls below 2.8 mg O 2 L − 1 , affects several 100,000 km 2 of marine water worldwide. Previous studies have shown that hypoxia results in aberrant behaviors of benthic fauna, collapse of fisheries, and major changes in the structure and trophodynamics of marine ecosystems. Nevertheless, it is not known
Wo, KT, Wu, RSS, Chiu, JMY
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Impact of silver nanoparticles on marine diatom Skeletonema costatum

Journal of Applied Toxicology, 2016
AbstractWhen silver nanoparticles (AgNPs) are used commercially at a large scale, they infiltrate the environment at a rapid pace. However, the impact of large quantities of AgNPs on aquatic ecosystems is still largely unknown. In aquatic ecosystems, the phytoplanktons have a vital ecological function and, therefore, the potential impact of AgNPs on ...
Huang, Jun, Cheng, Jinping, Yi, Jun
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Effects ofSkeletonema costatumExtracts on the Central Nervous System

Planta Medica, 1992
We report the effects of aqueous extracts of the microalga Skeletonema costatum Greve (Cleve) (Bacillariophyceae) on spontaneous motor activity, rectal temperature, motor coordination, amphetamine-induced hypermotility, exploratory behaviour, muscle relaxation, catalepsy, conditioned avoidance responses, oxotremorin-induced cholinergic syndrome, and ...
R, Villar, M R, Laguna, J M, Calleja, I, Cadavid   +3 more
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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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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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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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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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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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