共查询到20条相似文献,搜索用时 607 毫秒
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《Filtration+Separation》2003,40(7):9
European Environment Commissioner Margot Wallstrom has welcomed the final adoption, by the European Council of Ministers, of an ‘emissions trading law’ for the European Union (EU), according to a report by Environment News Service (ENS).This is a short news story only. Visit www.filtsep.com for the latest filtration industry news. 相似文献
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Keith Newland 《Coloration Technology》1991,107(9):299-301
A quality system cannot really work unless it includes an effective means of internal quality auditing. It cannot be stressed enough that until you routinely check and improve your quality system, you haven't really started. Having decided to implement an internal quality audit system you need to do the job well; after all, the word ‘quality’ is included! 相似文献
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X.G. Yuan 《Chemical engineering science》2008,63(16):4241-4242
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David Rex Timothy J. Clough Karl G. Richards Cecile de Klein Sergio E. Morales Md Sainur Samad Jim Grant Gary J. Lanigan 《Nutrient Cycling in Agroecosystems》2018,110(1):135-149
Grazed pastures contribute significantly to anthropogenic emissions of N2O but the respective contributions of archaea, bacteria and fungi to codenitrification in such systems is unresolved. This study examined the relative contributions of bacteria and fungi to rates of denitrification and codenitrification under a simulated ruminant urine event. It was hypothesised that fungi would be primarily responsible for both codenitrification and total N2O and N2 emissions. The effects of bacterial (streptomycin), fungal (cycloheximide), and combined inhibitor treatments were measured in a laboratory mesocosm experiment, on soil that had received 15N labelled urea. Soil inorganic-N concentrations, N2O and N2 gas fluxes were measured over 51 days. On Days 42 and 51, when nitrification was actively proceeding in the positive control, the inhibitor treatments inhibited nitrification as evidenced by increased soil NH 4 + -N concentrations and decreased soil NO 2 ? -N and NO 3 ? -N concentrations. Codenitrification was observed to contribute to total fluxes of both N2O (≥ 33%) and N2 (≥ 3%) in urine-amended grassland soils. Cycloheximide inhibition decreased NH 4 + –15N enrichment and reduced N2O fluxes while reducing the contribution of codenitrification to total N2O fluxes by ≥ 66 and ≥ 42%, respectively. Thus, given archaea do not respond to significant urea deposition, it is proposed that fungi, not bacteria, dominated total N2O fluxes, and the codenitrification N2O fluxes, from a simulated urine amended pasture soil. 相似文献