共查询到15条相似文献,搜索用时 328 毫秒
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国防科工委化学计量一级站为满足海军武器装置对湿度计量器具检定工作的需要,经过一年多的努力,研制安装了八台湿度计量标准装置(SB—94A湿度发生器),并于1995—03—25提交海军航空工程学院验收,经逐台测试,一次验收合格。该产品是 相似文献
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研究了反应介质浓度及其流速,反应管道长度,共存元素等对使用LZ-1200型流动注射氢化物发生器和WFX-10型原子有收分光光度计测定垃圾样品中汞的影响。方法准确度,精密均匀好,且操作简单,试剂用量少,分析速度快。经实验应用,结果满意。 相似文献
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V. T. Nakashidze K. D. Mgaloblishvili G. G. Dadunashvili D. K. Mgaloblishvili Ts. D. Turkadze 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2006,80(8):1344-1346
The main parameters governing the ozone concentration and the yield of an ozone generator were studied: the power and frequency of the voltage applied to UV lamp, temperature, and humidity of air. The relationship between these parameters and the ozone concentration was established. 相似文献
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Nabil M. Hassan Shinji Tokonami Masahiro Fukushi 《Journal of Radioanalytical and Nuclear Chemistry》2011,287(1):185-191
Indoor radon and thoron concentrations were dominated with their exhalation rate from building materials. Thus, the evaluation
of exhalation rate with highly precise is important. This paper presented a new technique to measure the dependence radon/thoron
exhalation rate, from building materials used in Japan, on absolute humidity. The measurement technique consisted of a solid
state alpha detector equipped a ventilation-type chamber and humidity control system in a flow through method. The exhalation
rate of dried samples (Indian red granite and Japanese gray granite) was measured at various absolute humidity levels in the
range of 1–20 g cm−3. It was found that exhalation rate increased exponential with increasing of absolute humidity for both samples. Furthermore,
the dependence of radon emanation coefficient on building material’s temperature was also studied using an accumulation chamber
equipped with scintillation cell alpha detector. The emanation coefficient of dry sample increased proportionally with increasing
the material’s temperature with a correlation factor of 0.88. 相似文献
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Krystian Skubacz Robert Hildebrandt Aleksandra Zgrska Zdzisaw Dyduch Krzysztof Samolej Adam Smolinski 《Molecules (Basel, Switzerland)》2021,26(12)
This paper presents a method of implementation and the results of aerosol dispersion tests in underground mine workings. Numerous tests were carried out to determine the potential risk of SARS-CoV-2 coronavirus infection in the underground environment of the mines. The influence of selected parameters of mine air on the possibility and method of aerosol transmission through ventilation routes was experimentally determined in real conditions. The concentration of additional aerosols in the class of ultrafine and fine aerosols increased with the distance from the generator, while the concentration of coarse particles decreased. Assuming the consumption of the solution with which aerosols were generated, even at a small level of 1 cm3/min., the number of additional aerosols was several hundred particles in one cubic centimeter of air at a distance of 50–70 m from the generator. The concentration of ultrafine particles in the range of 40–20,000 nm increased from 122 particles/cm3 to 209 particles/cm3 at air temperature of 12 °C and relative humidity of 95–96%, and from 90 particles/cm3 to 243 particles/cm3 at air temperature of 17 °C and relative humidity of 76–82%, with the increasing distance from the generator (10 m to 50 m). 相似文献