Results 171 to 180 of about 7,444 (195)
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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 +5 more
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Impact of silver nanoparticles on marine diatom Skeletonema costatum
Journal of Applied Toxicology, 2016AbstractWhen 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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Development of QSAR models for evaluating pesticide toxicity against Skeletonema costatum
Chemosphere, 2021Nowadays, 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 +6 more
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COPPER TOXICITY TO SKELETONEMA COSTATUM (BACILLARIOPHYCEAE)1,2
Journal of Phycology, 1978ABSTRACTCopper toxicity to Skeletonema costatum (Grev.) Cleve has been studied in batch cultures of chemically defined culture media. The alga is relatively insensitive to cupric ion activity, demonstrating no effect on growth up to (Cu2+) = 10−8.5 M.
N. M. L. Morel +2 more
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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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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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Regulation of carbon assimilation in Skeletonema costatum under diel variations
Science of The Total Environment, 2021Abstract Here, we explored the molecular responses of photosynthetic carbon fixation in a globally distributed marine diatom, Skeletonema costatum, based on incubation experiments over a 24-h period under natural light. A model of carbon metabolism was proposed based on the transcriptome of S. costatum. We examined the diurnal expression patterns and
Ying Li +5 more
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Development of microbial community during Skeletonema costatum detritus degradation
Hydrobiologia, 1997Microbial 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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Effects ofSkeletonema costatumExtracts on the Central Nervous System
Planta Medica, 1992We 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 +3 more
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Microalgae Skeletonema costatum for Cd and Cu Remediation
Asian Journal of Water, Environment and Pollution, 2020Cadmium (Cd) and copper (Cu) are types of heavy metals that can have an adverse effect on the ecosystem. Even copper is an essential metal but in limited concentrations, however, it leads to a toxic effect on the environment when used in high concentrations. Bioremediation of these metals can be done using microalgae Skeletonema costatum.
Pratiwi, Dwi Candra +4 more
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