نتایج جستجو برای: polonium
تعداد نتایج: 262 فیلتر نتایج به سال:
At the end of 19th century a few fundamental discoveries changed diagnostic and therapeutic possibilities in medicine and, particularly, in oncology: in 1895 Wilhelm Roentgen from Germany discovered X-rays, in 1886 Henry Becquerel described the phenomenon of radioactivity of uranium, and in 1898 Marie and Pierre Curie discovered radium and polonium. In 1903 the Nobel Prize for Physics was award...
The stand-alone microbeam, under development at RARAF, presents a novel approach to biological microbeam irradiation studies. Foregoing a conventional accelerator as a source of energetic ions, we propose to use a small, high-specific-activity, alpha emitter. Alpha particles emitted from this source are focused using a compound magnetic lens consisting of 24 permanent magnets arranged in two qu...
The fluminense vegetation, more specifically the flora from the Jurubatiba restinga has been investigated by a multidisciplinary team of botanists, chemist, radiobiologist, insect physiologists and geneticist. Vouchers of 564 specimens have been collected, identified, organized in an herbarium, and a database is being build up containing, in addition to classical botanical data, chemical data a...
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