منابع مشابه
The Action of Radium Emanation on the Vitamines of Yeast
Becquerell has observed that p-rays change yellow phosphorus into red form. Ramsey* and Cameron* have shown that the radium emanation has destruotive and partial synthetic actions upon water, carbon monoxide, carbon dioxide, hydrogen chloride, and ammonia. The decomposing action of radium rays on the lecithin molecule has been observed by Schwara,4 Schaper,& and Werner.6 On the other hand, no s...
متن کاملThe Action of Buried Tubes of Radium Emanation on Neoplasias I N Plants
The insertion into an animal tumor of buried capillary glass tubes containing radium emanation presents a comparatively new departure in radium therapy and is undoubtedly destined to play a prominent part in the future development of the whole field of radiotherapeutics. The technique employed on animals and human beings is as follows: Radium emanation, the first active product of decomposition...
متن کاملRadon diffusion and the emanation fraction for NIST polyethylene capsules containing radium solution
The national standard for radon (Rn) measurements in the United States is based on Standard Reference Materials (SRMs) prepared at the National Institute of Standards and Technology (NIST), Gaithersburg, MD. NIST radon standards are hermetically sealed polyethylene capsules, filled with radium (Ra) solution. In preparation of standard reference materials for Rn, it is necessary to understand pr...
متن کاملThe Refractivity of Air
The air density equation of Jones, Edlen's dispersion formula for standard air, and Edlen's empiricallyderived expressions for the effects of CO 2 abundance and water vapor partial pressure on refractivity have been combined into a simplified equation for the refractivity of air, and estimates have been made of uncertainties in calculated refractivity. Under ambient conditions typical of metrol...
متن کاملDetermining the Refractivity
High accuracy of impact height is important to get reliable Radio Occultation (RO) measurements of the atmosphere refractivity. We have made an investigation on how accurately we can measure the impact height at ground level using wave optics simulations, realistic refractivity profiles, a realistic simulator for an advanced RO instrument including noise, and using phase matching for the invers...
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ژورنال
عنوان ژورنال: Nature
سال: 1909
ISSN: 0028-0836,1476-4687
DOI: 10.1038/082007b0