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Advances in Water Pollution Research. Proceedings of the by O. Jaag

By O. Jaag

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Extra resources for Advances in Water Pollution Research. Proceedings of the Second International Conference Held in Tokyo, August 1964

Example text

The reaction curves are common to three kinds of gradients of total Cu (upper), pH (middle) and total acidity (lower). successfully, but it took a long time. Only when such concentrations that proved not fatal in a short period were applied, all the fish were able to avoid injurious concentrations after a long period.

LABONDE and M. C. HANNOUN This pollution, moreover, is accounted for by the fact that, at the present time, sanitation in Paris is incomplete, contaminated water reaches the river and that, in spite of auto-purification during the flow of the river itself, viruses do remain present over rather extensive distances. On the other hand, spring water tests more rarely produce virus isolations. Though it should be mentioned that the method used is not the same in this case (sampling in jerricans and alumina flocculation).

A test at 4 different stages, with about 6 months interval, on the discharge from two septic tanks, in which the waste water from a preventorium is collected, has resulted in the isolation of 5 stocks, of which 4 on the guinea-pig, of M. Kansasii. Corresponding tests on water, taken at the level of discharge into the river 3 km away, have permitted each time to recover the same stock on one guinea-pig or on both. In the 3rd month all the guinea-pigs present an introdermal reaction to tuberculine, positive at 1/100°, a residual abscess at the point of inoculation and insignificant adenopathies, inguinal and sub-lumbar; two animals show, in addition, tracheo-bronchial adenopathies.

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