TRENDS IN OSTRACODA AND CLADOCERA DISTRIBUTION AND WATER CHEMISTRY IN SUBARCTIC CANADA: CHURCHILL (MANITOBA) LAKES AND PONDS REVISITED

Trends in Ostracoda and Cladocera distribution and water chemistry in subarctic Canada: Churchill (Manitoba) lakes and ponds revisited

Ponds and lakes distributed across northern treeline in the Hudson Bay Womens Sunshirt Lowlands near Churchill (Manitoba) were revisited to analyse and document the local ecoclimatic and limnological changes that occurred over the period 1997-2012.Our analyses revealed that single events may cause significant changes in salinity, pH and silicate co

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Design of high efficiency centrifugal compressors stages

The modern trend in compressor industry is an extension of the use of multi-shaft centrifugal compressors.Multi-shaft compressors have a number of advantages over single-shaft.The design of such compressors gives opportunity to use an axial inlet for all stages and select the optimum rotational speed for each pair of impellers, which, along with th

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