نتایج جستجو برای: radium equivalent activity
تعداد نتایج: 1262006 فیلتر نتایج به سال:
Coal is an important non-renewable energy source of and can be associated with radioactive elements. In Figueira city, Paraná state, Brazil, it was recorded high uranium activity near the coal mine that supplies a local thermoelectric power plant. In this context, the radon activity (Rn-222, produced by the Ra-226 decay in the U-238 natural series) was evaluated in groundwater, river water and ...
BACKGROUND In Alpharadin in Symptomatic Prostate Cancer (ALSYMPCA) trial, radium-223 versus placebo prolonged overall survival with favorable safety in castration-resistant prostate cancer patients with symptomatic bone metastases. Long-term radium-223 monitoring underlies a comprehensive safety and risk/benefit assessment. OBJECTIVE To report updated ALSYMPCA safety, including long-term safe...
A Python program is presented to expedite the process of correcting raw data and propagating related uncertainties from Radium Delayed Coincidence Counting (RaDeCC) instruments. The performance was validated against an established method with real data. Excellent agreement between determinations excess radium-223, actinium-227, radium-224, thorium-228 radium-226 achieved, minor discrepancies in...
Of all the scientific discoveries of the last year one stands pre-eminent, not only from its scientific importance, but als? from the great public interest it has excited. I refer to discovery by Mons. and Madame Curie of radium. Thl5 discovery was not like that of the Rontgen rays suddenly, but had been led up to by the researches 0 Becquerel and of Rontgen, and was ultimately due to ^e painst...
In our studies on the radiochemical reaction effeeted by the radiations (beta and gamma) from radium emanation in which enzymes are inactivated we have stated that in a given system the chemical change is a function of the product of two variables; namely, the average amount of emanation present, Eo, and time, t. Theproduct of these two variables has been equated to a single variable, W, for wh...
The level of natural radioactivity in black sand and sediment samples collected from Temsah Lake beaches of the Suez Canal district, Egypt were investigated. The natural activity concentration of Ra, U, Th and K for 20 black sand and 20 sediment samples were determined using gamma spectrometers based on HPGe detector with low background gamma-ray counting system. For assessing the environmental...
Background Baseline clinical variables are prognostic for overall survival (OS) in patients with castration-resistant prostate cancer (CRPC). Their prognostic and predictive value with agents targeting bone metastases, such as radium-223, is not established. Patients and methods The radium-223 ALSYMPCA trial enrolled patients with CRPC and symptomatic bone metastases. Prognostic potential of ...
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...
Radium-223 dichloride (radium-223) is an important therapeutic option for the treatment of patients with castration-resistant prostate cancer, symptomatic bone metastases, and no visceral disease. The unique mechanism of action of this first-in-class alpha-emitting radiopharmaceutical underlies its favorable safety profile and low incidence of myelosuppression. In the pivotal phase 3 ALpharadin...
Mining generates significant amounts of waste that can represent a source contamination for areas close to the extraction area, generating negative impact both on environment and health people. This study aims evaluate radiological risk derived from exposure natural radionuclides contained in tailings Peruvian gold mines establish whether be used as raw materials building materials. The mine co...
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