The smaller particles that dominate the particle number concentration (PNC) in the ambient air only contribute to a small percentage of particulate matter (PM) mass concentration although present in high particle number concentration. These small particles may be neglected upon assessing the health impacts of the PM. Hence, the knowledge on the particle number concentration size distribution deserves greater attention than the particulate mass concentration. This study investigates the measurement of the particle mass concentrations (PM2.5) and PNC of 0.27 μm < Dp < 4.50 μm during the southwest (SW), inter-monsoon (IM) and northeast (NE) monsoons in the industrial-residential airshed of Skudai, Johor Bahru, Malaysia. The PM2.5 mass concentrations and PNC were measured using a multi-channel GRIMM Environmental Dust Monitor (GRIMM EDM-SVC 365) equipped with a global positioning system. Diurnal variations, statistical analysis and regression plots were utilised from a six-month ho
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Global Perchloroethylene Market: By Type (
Ethylene direct chlorination, Acetylene method, Ethylene oxychlorination), By Application (
Dry cleaning agent, Solvent), Regional Analysis and Forecast 2025.” The report promises to offer all the key insights about the Perchloroethylene market thus helping our clients to have a clear view of the current market scenario. The overall market size in terms of value and volume has been calculated by the research analysts along with the expected growth rate for the forecast period. The anticipated market value for the Perchloroethylene market is in terms of USD Million. It is expected that the Perchloroethylene market will witness a steady and good growth rate from 2020 to 2025.
across the central atlantic. this is tropical depression four. a lot of things working against the strengthening of this tropical depression, that being the upper level wind shear and also saharan dust coming off of north central africa. you see that on our dust monitor that s streaming right into the location where our particular tropical depression is located. this is the satellite loop. you see how poorly organized this particular system is. only winds at about 30 miles per hour. the national hurricane center doesn t believe the storm will impact land. that s good news. scattered showers, though, across the southeast. severe storms throughout the ohio river valley. we re focusing attention from cleveland to pittsburgh, indianapolis indianapolis, a possible tornado. a wet day new york to boston. have your raincoats and umbrellas handy. let s talk temperatures. cloud cover and rain in the forecast, only 79 for the big apple today. back to you. 79 is fine