Nature, Volume 253Sir Norman Lockyer Macmillan Journals Limited, 1975 |
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Página 175
... lead on iron is 9.2 , calculated from the Auger electron spectra of the pure elements and from measured electron ranges in similar elements 2,3 . It seems therefore that the lead is con- centrated in a layer about one monolayer thick ...
... lead on iron is 9.2 , calculated from the Auger electron spectra of the pure elements and from measured electron ranges in similar elements 2,3 . It seems therefore that the lead is con- centrated in a layer about one monolayer thick ...
Página 344
... lead concentration in the urban samples was 970 p.p.m. ( standard deviation 46 ) ; the numerical distribution is shown in Fig . 1. The highest value encountered was 10,200 p.p.m. and the lowest 90 p.p.m. But the higher values were ...
... lead concentration in the urban samples was 970 p.p.m. ( standard deviation 46 ) ; the numerical distribution is shown in Fig . 1. The highest value encountered was 10,200 p.p.m. and the lowest 90 p.p.m. But the higher values were ...
Página 345
... lead ingestions much greater than this - 20 badly contaminated sweets could contain 1,000 μg of lead . We conclude that children in urban surroundings , who may already be ingesting in food and drink an amount of lead approaching a ...
... lead ingestions much greater than this - 20 badly contaminated sweets could contain 1,000 μg of lead . We conclude that children in urban surroundings , who may already be ingesting in food and drink an amount of lead approaching a ...
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London Ltd 1974 2 50 | 2 |
72 Ft Harcourt Brace Jovanovich Publishers 1974 18 50 | 18 |
PrenticeHall Inc 1974 Cleveland Ohio CRC Press Inc Oxford Blackwell Scientific Publications 1974 | 119 |
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