نتایج جستجو برای: rad7
تعداد نتایج: 80 فیلتر نتایج به سال:
Background: The problem of radon (Radon-222) in water is one the daily health hazards faced by those Ojo Axis, Nigeria. Therefore, continuous monitoring contamination different types essential. In present work, sixteen groundwater and surface-water samples (wells, boreholes, sachets) were collected from six locations within Local Government area stored 75 cl bottles that already sterilized with...
We have measured the kinetics of the recovery of mRNA synthesis in the inducible GAL10 and RNR3 genes after exposure of yeast cells to ultraviolet (UV) radiation. Such recovery is abolished in mutant strains defective in nucleotide excision repair (NER) of DNA, including a rad23 mutant. Mutants defective in the RAD7 or RAD16 genes, which are required for the repair of the non-transcribed strand...
The main objective of this study was to assess Radon concentration in the harvested rainwater (HRW) at the household level in Yatta area, Palestine. HRW is mainly used for drinking as it is the major source of water for domestic uses due to water scarcity. Ninety HRW samples from the household cisterns were collected from six localities (a town and five villages) and Radon concentrations were m...
Durridge Company offers RAD7 and H2O accessory to measure the radon concentration in water based on bubbling method. There are two types of small sample bottles: 40 mL 250 mL. The company also provided a big bottle with volume 2500 water. For bottles, conversion coefficients 25 4, respectively. drying tube contains only 30 g desiccant, which makes it inconvenient for long time needs be replaced...
زمینه: گاز رادون از مهمترین منابع رادیواکتیو طبیعی در معرض تماس انسان است که مواجهه با آن عوارض عمده ای از جمله سرطان ریه و معده به همراه دارد که هدف از این مطالعه، تعیین دوز مؤثر جذب شده سالانه گاز رادون ساکنان شهرستان های رفسنجان و انار بود مواد و روش ها: این مطالعه تجربی بوده و بر روی 36 منبع آب شرب و کشاورزی شهرستان رفسنجان که به صورت تصادفی انتخاب شده بودند انجام گردیده بود. غلظت گاز ...
رادون یک عنصر گازی شکل با نماد شیمیای rn است که بی رنگ و بی بو است ودرزنجیره های واپاشی اورانیوم و توریوم آزاد می شود. رادون 222rn از واپاشی اورانیوم238u حاصل می شود و در بین ایزوتوپهای دیگر بیشترین نیمه عمر را داراست (82/3روز). رادون 220rn که به اصطلاح تورون خوانده می شود یکی از ایزوتوپهای طبیعی رادون است که دارای نیمه عمر پایین 53.54 ثانیه می باشد و به همین دلیل اندازه گیری آن بسیار سخت شده ا...
In the present work, it had been measured concentration of radon gas (CRn) for (10) samples cement used in constructions before and after painting them using enamel paint, purchased from local markets, to see extent its ability reduce emissions Rn-222 air. These were obtained different sources available markets Baghdad other provinces. The measurements done by American-made detector (RAD7). res...
Radon exhalation rate is the of radioactive radon gas that escapes from soil into atmosphere. In this study was measured for 33 samples soil, in four districts Duhok province, using two different techniques: one concentration and other radium content, by both alpha gamma spectroscopy. For measurement, alpha-sensitive RAD7 detector used. While second method, expressed as a function concentration...
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