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Mutagenic activity organic residuals

Mutagenic Activity of Residue Organics from a Variety of Aqueous Samples. Samples of residue organics from differing aqueous environmental sources have been found to contain a wide variation not only in... [Pg.401]

Table I. Mutagenic Activity for Residue Organics Isolated from a Variety of Aqueous Environmental Samples... Table I. Mutagenic Activity for Residue Organics Isolated from a Variety of Aqueous Environmental Samples...
Figure 5. Direct-acting mutagenic activity of HPLC fractions (1-4, Figure 4) obtained by sequential step elution of residue organics isolated from finished drinking water I. Af/X indicates the mutagenic activity measure for an aliquot of residue organics proportionately reconstituted from the separate fractions Sl/Af is the arithmetic sum of the net revertant colonies for each dose for... Figure 5. Direct-acting mutagenic activity of HPLC fractions (1-4, Figure 4) obtained by sequential step elution of residue organics isolated from finished drinking water I. Af/X indicates the mutagenic activity measure for an aliquot of residue organics proportionately reconstituted from the separate fractions Sl/Af is the arithmetic sum of the net revertant colonies for each dose for...
Figure 3. Effect of heating on the activity of a mutagenic drinking water concentrate. A mutagenic XAD-4/8 acetone concentrate (neutral fraction) was heated to 250 °C. The total heating time was 1 h. After this period, the organic residue was dissolved in acetone and retested in the Salmonella... Figure 3. Effect of heating on the activity of a mutagenic drinking water concentrate. A mutagenic XAD-4/8 acetone concentrate (neutral fraction) was heated to 250 °C. The total heating time was 1 h. After this period, the organic residue was dissolved in acetone and retested in the Salmonella...
Effects of pH on the Recovery of Mutagenic Activity. The effect of pH, characteristic of the modified EMSL method, was examined in the following experiment. Residue organics extracted from a sample of primary sludge first were isolated via the milling procedure and then recombined in proportions representative of the original sample. An aliquot (ALIQ-I) of this reconstituted sample was bioassayed. A second aliquot (ALIQ-II) was spiked into aqueous base of pH 11. Then, the... [Pg.664]

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Active residues

Mutagenic activity

Organ activation

Organic actives

Organic residuals

Residual activities

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