Interaction of aquatic substances with anilazine and its derivatives: The nature of the bound residues

Klaus, Uwe; Mohamed, Seeraj; Volk, Matthias; Spiteller, Michael

doi:10.1016/s0045-6535(98)00050-2

Cited by 40 publications

(16 citation statements)

References 17 publications

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“…The original samples were filtered using a 0.45 µm tangential-flow membrane and concentrated by ultrafiltration with a 1000 g mol -1 cut-off tangentialflow membrane [12,13]. The concentrates were lyophilized and redissolved in demineralized water to remove excess of salt by gel filtration (Sephadex G 10).…”

Section: Origin Of Dom Usedmentioning

confidence: 99%

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Interaction of Aquatic Dissolved Organic Matter(DOM) with Amitrole: The Nature of the Bound Residues

Klaus

Oesterreich

Volk

et al. 1998

Acta hydrochim. hydrobiol.

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Section: Origin Of Dom Usedmentioning

confidence: 99%

“…The concentrates were lyophilized and redissolved in demineralized water to remove excess of salt by gel filtration (Sephadex G 10). The elemental compositions were: lake water DOM C 49.5%, H 3.6%, N 1.4%, O 41.4%, S 0.3%, P <0.1%, ash 8.1%; compost effluent DOM C 40.5%, H 5.1%, N 2.7%, O 45.3%, S 1.2% P 0.3%, and ash 9.4% [13].…”

Section: Origin Of Dom Usedmentioning

confidence: 99%

Interaction of Aquatic Dissolved Organic Matter(DOM) with Amitrole: The Nature of the Bound Residues

Klaus

Oesterreich

Volk

et al. 1998

Acta hydrochim. hydrobiol.

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“…Although the interactions of hydrophilic organic compounds with HS is little studied, clear indications from molecular modelling do exist for water soluble compounds, such as hydroxyatrazine, peptide and saccharides that hydrogen bonds appear to be the most important bond type (Schulten and Leinweber, 2000). However, further bond types, including covalent and non‐covalent bonds such as charge transfer and occlusion within the HS matrix, may exist (Klaus et al., 1998a,b). An adsorption of formalin to HS/NOM is probable, hence reducing the free formalin concentration and its subsequent fish toxicity.…”

Section: Discussionmentioning

confidence: 99%

Formaldehyde toxicity is altered by calcium and organic matter

et al. 2005

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Formaldehyde is one of the shortlist substances permitted for use in aquaculture. Toxicity of formaldehyde and therapeutical success is influenced by water parameters. However, there is a lack of information on the interaction of organic carbon and calcium (Ca 2+ ) on the toxicity of formaldehyde. Laboratory experiments were conducted to test the combined effects of Ca 2+ and natural organic matter (NOM) on formaldehyde toxicity. Zebrafish embryos were exposed to five concentrations of formaldehyde for 144 h. Juveniles exposed to high concentrations died; the embryos exposed to low concentrations were unable to hatch, particularly visible in the groups without NOM. The toxicity-reducing effects of NOM are not attributable to the presence of Ca 2+ .

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“…Many studies have been conducted on the toxicity of metal ions in the presence of HS. Moreover, HS were found to alter the properties of pesticides and other xenobiotics in aquatic systems (McCarthy and Jimenez, 1985; Chin et al., 1997; Steinberg et al., 1997; Klaus et al., 1998a,b; Haitzer et al., 1999; Schulten and Leinweber, 2000; Kopinke et al., 2001). Oikari et al.…”

Section: Introductionmentioning

confidence: 99%

Humic substances and the water calcium content change the toxicity of malachite green

Meinelt

Pietrock

Wienke

et al. 2003

Journal of Applied Ichthyology

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Laboratory experiments were conducted to test interactive effects of calcium (Ca 2+ ) content and the presence of humic substance (HS) on malachite green (MAG)-induced toxicity in fish embryos and larvae by means of a semistatic 144-hembryo-larval-test with zebrafish (Danio rerio). Two kinds of reconstituted water samples were used to produce the test media by mixing salts into deionized water resulting in either hard water (›Ca ) HS), or soft water (flCa ) HS). By adding HS two additional test media were produced (›Ca + HS, flCa + HS). MAG was tested in concentrations of 0.05, 0.10, 0.15, 0.20, 0.25 mg L )1 . The toxicity ranking of MAG (mg L )1 ) to embryos based on 96-h-LC 50 in the different test water samples is: ›Ca ) HS (0.061) > ›Ca + HS (0.123) ¼ flCa ) HS (0.12) ‡ flCa + HS (0.134) and on 144-h-LC 50 to larvae is: ›Ca ) HS (0.038) > ›Ca + HS (0.06) > flCa ) HS (0.077) ¼ flCa + HS (0.077). Mortality of all the groups was significantly different (P < 0.05). Increased Ca 2+ concentrations did not protect zebrafish embryos and larvae from MAG-induced toxicity. At high Ca 2+ conditions, the mortality of the embryos as well as of the larvae is reduced in the ›Ca + HS group relative to the ›Ca ) HS group. Thus, at high Ca 2+ conditions the HS does affect the MAG-induced mortality. The mechanism which causes the higher toxicity of MAG in the presence of higher Ca 2+ concentrations is poorly understood. A probable explanation could be the stimulation of the calcium-binding protein calmodulin as well as the calmodulin kinase II in cell membranes in the presence of high Ca 2+ concentrations.

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Interaction of aquatic substances with anilazine and its derivatives: The nature of the bound residues

Cited by 40 publications

References 17 publications

Interaction of Aquatic Dissolved Organic Matter(DOM) with Amitrole: The Nature of the Bound Residues

Interaction of Aquatic Dissolved Organic Matter(DOM) with Amitrole: The Nature of the Bound Residues

Formaldehyde toxicity is altered by calcium and organic matter

Humic substances and the water calcium content change the toxicity of malachite green

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