Toxic effects of tetraethyl lead and its derivatives on the chrysophytePoterioochromonas malhamensis. VIII. Comparative studies with surfactants

Röderer, G.

doi:10.1007/bf01054946

Cited by 10 publications

(2 citation statements)

References 29 publications

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“…The Au nanoprisms with edge length 60 ± 5 nm were synthesized using MW irradiation as described in detail in the experimental section. CTAB, which itself might be toxic , was used as a capping agent for the synthesis of the Au NPs. Moreover, CTAB-coated Au NPs are nontoxic. , The toxicity appears due to the unbound CTAB on the Au NPs surface.…”

Section: Resultsmentioning

confidence: 99%

Shape-Controlled Catalysis by Cetyltrimethylammonium Bromide Terminated Gold Nanospheres, Nanorods, and Nanoprisms

2009

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Shape-controlled Au nanospheres, nanorods, and nanoprisms have been utilized for the first time for selective chemical reduction of different aromatic nitro compounds to the corresponding amino derivatives at room temperature. Careful observation reveals that the reaction was fastest with nanospheres and slowest with nanorods, whereas the rate was intermediate with nanoprisms when keeping the numbers of particles approximately the same. Controlled experiments revealed that our reaction followed the nitroso and hydroxylamine pathway. The yield of the product was very high, and the method should be applicable for very fast catalysis reaction of other nitro compounds.

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Section: Resultsmentioning

confidence: 99%

Shape-Controlled Catalysis by Cetyltrimethylammonium Bromide Terminated Gold Nanospheres, Nanorods, and Nanoprisms

2009

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“…Although they are easily biodegredable they nevertheless decrease the performance of activated sludge systems [l, 21, damage pine trees by increasing the uptake of sodium ions [3,4,5], and by dissolving the surface wax layer of pine needles [6]. Tensides exert an inhibitory effect on the growth of Spirodela polyrrhiza (L) Schleiden [7], they are lethal to Medaka Oryzias Latipes [8] inhibit the potassium uptake of wheat seedling roots [9], significantly enhance absorption rate constant for highly lipophilic 4-alkylanilines in rat colon [lo], modify the dissolution rate and disintegration of granules and tablets [ll] they are cytolytic [12] etc. The biological activity of nonionic tensides is based on their interaction with membrane phospholipids [S, 131, however it has been reported, that they modify protein conformation [la], disrupt phospholipid-protein complexes [ 151 and enhance enzymatic activity [16].…”

Section: Introductionmentioning

confidence: 99%

Nonionic tensides modify papain structure and proteolytic activity

Szőgyi

Cserháti

1990

Acta Biotechnologica

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The effect of 33 polyethoxylated nonionic tensides with various hydrophobic moieties was studied on the proteolytic activity and phase transition behaviour of papain. Tensides with longer ethyleneoxide chain markedly increased the phase transition temperatures of papain indicating possible hydrogen bond formation between the hydrophilic ethyleneoxide chain and the polar substructures of papein. The character of Iipophilic moiety of tensides influences also each physicochemical parameter of papain suggesting the existence of hydrophobic interactions too. The significant positive linear correlations between the activity increasing and structure stabilizing effects of tensides make probably that the structure modification of papain accounts for its enchanced proteolytic activity. IntroductionNonionic tensides are widely used for many purposes, as in pesticide and pharmaceutical formulations. The concomitant toxic phenomena are also varied. Although they are easily biodegredable they nevertheless decrease the performance of activated sludge systems [l, 21, damage pine trees by increasing the uptake of sodium ions [3,4,5], and by dissolving the surface wax layer of pine needles [6]. Tensides exert an inhibitory effect on the growth of Spirodela polyrrhiza (L) Schleiden [7], they are lethal to Medaka

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Are laboratory‐derived toxicity data for freshwater algae worth the effort?

Lewis

1990

Enviro Toxic and Chemistry

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Algal toxicity test results are increasingly being considered in the evaluation of the environmental safety of chemicals and effluents. The ability of the current standard toxicity test methods to provide data useful in the safety assessment process was reviewed. It was concluded that there are too few data supporting the environmental relevance of those results derived using the standard methods in their present format. The current algal toxicity data base shows that interspecific variation in response to chemicals is significant and that field-validation of most laboratory-derived results is lacking. Therefore, multiple test species should be used in algal toxicity tests and the biological significance of the recommended end points, including stimulation, needs definition before the results can be expanded to natural algal communities and be useful in predicting environmental impact.

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Toxic effects of tetraethyl lead and its derivatives on the chrysophytePoterioochromonas malhamensis. VIII. Comparative studies with surfactants

Cited by 10 publications

References 29 publications

Shape-Controlled Catalysis by Cetyltrimethylammonium Bromide Terminated Gold Nanospheres, Nanorods, and Nanoprisms

Shape-Controlled Catalysis by Cetyltrimethylammonium Bromide Terminated Gold Nanospheres, Nanorods, and Nanoprisms

Nonionic tensides modify papain structure and proteolytic activity

Are laboratory‐derived toxicity data for freshwater algae worth the effort?

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