منابع مشابه
Improved detection of volcanic sulphur dioxide using infrared imaging radiometers
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متن کاملSulphur Dioxide Exposure
Bronchoalveolar lavage (BAL) which has not previously been used in investigating the effect of sulphur dioxide (SO2) on the human lung was performed on 12 subjects before and after controlled chamber exposure with SO2 for 20 minutes. BAL fluid 24 hours after exposure with 10 mg S02/m3 (4 ppm, 10 subjects) showed increased alveolar macrophage activity as judged by an increase in lysozyme positiv...
متن کاملSatellite-based detection of volcanic sulphur dioxide from recent eruptions in Central and South America
Volcanic eruptions can emit large amounts of rock fragments and fine particles (ash) into the atmosphere, as well as several gases, including sulphur dioxide (SO2). These ejecta and emissions are a major natural hazard, not only to the local population, but also to the infrastructure in the vicinity of volcanoes and to aviation. Here, we describe a methodology to retrieve quantitative informati...
متن کاملThe Utilization of Sulphate and Sulphur Dioxide for the Sulphur Nutrition of Alfalfa.
Though sulphur has long been recognized as an essential element in plants, particularly as a constituent of the proteins, it has not received much consideration in fertilizer studies. As shown by the work of HART and PETERSON (3), this was partly due to the older practice of determining sulphur in the ash of vegetation, which gave low results and did not indicate the true sulphur needs of the p...
متن کاملInterferometric determination of the refractive index of liquid sulphur dioxide
The absolute refractive index of liquid sulphur dioxide (SO2) was determined with an uncertainty of ±0.0007 with the help of a Michelson interferometer and a computer-controlled rotatory stage supporting a rectangular fused silica cell, containing the liquid. The measurements were performed at temperatures around 20 ◦C for the laser line wavelengths 632.8, 514.5 and 488.0 nm. The experimental d...
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ژورنال
عنوان ژورنال: School Science and Mathematics
سال: 1914
ISSN: 0036-6803
DOI: 10.1111/j.1949-8594.1914.tb16191.x