منابع مشابه
the washback effect of discretepoint vs. integrative tests on the retention of content in knowledge tests
در این پایان نامه تاثیر دو نوع تست جزیی نگر و کلی نگر بر به یادسپاری محتوا ارزیابی شده که نتایج نشان دهندهکارایی تستهای کلی نگر بیشتر از سایر آزمونها است
15 صفحه اولstudy of khraghan (ghazvin) mineral springs
one of the natural resources in our country is mineral water that hasnot been used as it should, and can be found allover the country. kharaqhan hot water is located by the ghazvin-hamedan road. this spring is being used in a very primitive way and is the subject of this investigation. the analyses were carried on the field and in the laboratory by standard methods and the results are shown in ...
متن کاملRadiological aspects of some Egyptian thermo-mineral springs.
In Egypt, nineteen water springs with temperatures exceeding 35 degrees C, which can be considered thermal waters, were reported. The radiological aspects of thermal water in three northern regions of Egypt (Gulf of Suez, Cairo, and Bahariya Oasis) were investigated. The activity concentrations of natural radionuclides of 226Ra, 40K, total uranium and 210Pb (210Po) in water samples were determi...
متن کاملAssessment of radon-222 and radium-226 radioactivity concentration in the mineral and drinking water of Sareyn city
The main objective of this research is measurement and assessment of the Radon-222 and Radium-226 radioactive levels in mineral water and drinking water in the Sareyn city. The guidelines used for Radon-222 and Radium-226 radiation sampling and analysis were ASTM D: 5072-09 and ISO 13165-1: 2013, respectively. The concentration of Radon-222 and radium-226 in mineral water and drinking water sam...
متن کاملAn improved Geiger-counter arrangement for determination of radium content.
Geiger-counter apparatus in which several counters may be placed in any position relative to each other is described. A circular arrangement of counters to give a counting rate approximately independent of the position of a so urce near the center of the circle is discussed. The relation of the I osition of the source to the counting rate of a single Geiger counter is discus ed. A method of cal...
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ژورنال
عنوان ژورنال: Bulletin of the Chemical Society of Japan
سال: 1940
ISSN: 0009-2673,1348-0634
DOI: 10.1246/bcsj.15.333