PubMed · 177920
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Sweden attacks toxic substances.. https://pubmed.ncbi.nlm.nih.gov/177920/
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Capturing the spatiotemporal distribution of pollutants in industrial parks remains challenging for regional air quality models because of their coarse resolution (3 km), resulting in uncertainties in local emission quantification. To address this, we developed the Integrated Multiscale Air Quality Modelling System for Industry (IAQMS-Industry), coupling the regional Nested Air Quality Prediction Modelling System (NAQPMS) with a city-scale chemical transport model. This framework integrates point-source locations and Gaussian plume dispersion to simulate particulate matter with a diameter smaller than 2.5 micrometres (PM2.5) at 100 m resolution. Applied to the Beijing Yi Zhuang and Tangshan industrial parks and evaluated against observations. The coupled model achieved a normalized mean bias (NMB) ranging from 3.1 % to 6.2 %, improving upon NAQPMS (-16.9 % to -7.7 %). Spatial analysis revealed that coarse regional grids underestimated the PM2.5​ concentrations at industrial sites by smoothing gradients, whereas IAQMS-Industry successfully resolved spatial patterns. Industrial point emissions accounted for 22.9 %-26.4 % of PM2.5 in the coupled model, which was significantly greater than the regional model estimates of 1.6 %-13.7 %. These findings indicate that regional models overestimate pollutant dispersion processes in industrial parks while underestimating local industrial impacts. By explicitly resolving point-source dynamics and linking them to regional transport, IAQMS-Industry provides a robust tool for designing targeted emission controls in industrial cities and balancing local air quality improvements with minimized regional pollution outflow. This study underscores the necessity of multiscale modelling for accurate source apportionment and informed environmental governance in industrial zones.
It is out of the question that alloarthroplasty of the upper angle joint must today belong to the therapeutic repertoire of the orthopedic surgeon. The anatomical situation of the upper ankle joint brings considerable problems for the total replacement and then also for the surface replacement. At the time being models are already available, which, seen on the whole, have already brought quite reliable results. Requirement for the success of the operation is the technically perfect insertion of the surface replacement or of the total joint and furthermore the insertion of the replacement under appropriate conditions, whereby the operation in an aseptive room ("Reinraum") has proven itself effective also on the upper ankle joint.
Forced smoking (= passive smoking) is not only a molestation but a real health risk for nonsmokers. The reasons for this are given in detail by a survey of results of the world literature. The main reasons are: In tobacco smoke are more than 40 cancerogenic substances which show a clear summative effect in contrast to other poisons. Avoidable cancerogens therefore must be eliminated from our environment wherever it is possible. There is no reason to make an exception with tobacco smoke. Special attention is to be paid to more than a dozen of cancerogenic nitrosamines in tobacco smoke. The content of nitrosamines in sidestream-smoke is up to fifty times higher than in the main stream of the tobacco smoke. Tobacco smoke therefore is the most important source of nitrosamines in our environment at all. The cancerogenic effect of passive smoking is secured in animal experiments unobjectionably. Passive smoking is the most important cause of bronchitis and pneumonia in early childhood and favours inflammations of the respiratory tract in older children and in animal experiments, etc.