ScienceJohn Michels (Journalist) 1957 |
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Стр. 221
... sample . At the level of 10 disintegrations per minute , per sam- ple , the precision is a few percent . Even at low levels of activity , the variation in the individual samples is considerably larger than the experimental error . The ...
... sample . At the level of 10 disintegrations per minute , per sam- ple , the precision is a few percent . Even at low levels of activity , the variation in the individual samples is considerably larger than the experimental error . The ...
Стр. 223
... samples from individuals 40 to 60 years of age comprised half of the total . These are the only ones in the table that were obtained in the spring and fall of 1954. At that time the strontium - 90 content of adult bone was distinctly ...
... samples from individuals 40 to 60 years of age comprised half of the total . These are the only ones in the table that were obtained in the spring and fall of 1954. At that time the strontium - 90 content of adult bone was distinctly ...
Стр. 1158
... samples can be counted daily . Versatility is indicated by the fact that this is a method of spectrometry . Pulse height analysis permits selection of the most favorable sample and background condi- tions . Also , two or more beta ...
... samples can be counted daily . Versatility is indicated by the fact that this is a method of spectrometry . Pulse height analysis permits selection of the most favorable sample and background condi- tions . Also , two or more beta ...
Содержание
News of Science Asian Nuclear Center IGY Upper Atmosphere Research Free Radicals | 18 |
Meetings and Societles Symposium on Xray Microscopy Conference on Tissue Culture Forthcoming | 30 |
Route of elimination of anthracene | 45 |
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