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国际医学放射学杂志 2018年第2期 248-249页

作者： r.van Dijk K.Dirkjan T.A.m.Kaandorp p.r.m.van dijkman V.rozemarijn p.van der Harst 王宗英 University of Groningen University Medical Centre GroningenCentre for Medical Imaging

摘要目的对比分析腺苷灌注心脏mr（Cmr）基于早期T1WI合成钆增强（ESGE）影像与传统晚期钆增强（LGE）影像在评估心肌瘢痕的价值。方法 214例疑似心肌缺血的病

关键词：特异度 T1WI NpV ppV 敏感度

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Seasonal changes on two different spatial scales： response of aquatic invertebrates to water body and microhabitat

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Insect Science 2005年第4期12卷 263-280页

作者： WILCO C.E.p. VErBErK HEIN H. van KLEEF mArTIJN dijkman pAUL van HOEK pETEr SpIErENBUrG HANS ESSELINK Bargerveen Foundation Radboud University Nijmegen Department of Environmental Studies Institute for Wetland and Water Research Radboud University Nijmegen Department of Animal Ecology and Ecophysiology Radboud University NijmegenNijmegen the Netherlands

Knowledge about the spatial and temporal scales of both habitat use and the functional significance of different adaptations is essential for an understanding of the population dynamics of invertebrate assemblages. This fundamental knowledge is not only interesting from an academic point of view, but is sorely lacking and needed in the field of restoration ecology. many species are threatened due to degradation. Knowing what environmental conditions are needed dtLring the life cycle of these species is important in the design of restoration measures which aim to lift existing bottlenecks for threatened species. To assess the relative importance of water type and microhabitat in structuring the invertebrate assemblage during different seasons, invertebrates were sampled in three water bodies differing in trophic level and acidity. Different parts within a water body （microhabitats） were sampled separately and each water body was sampled in all four seasons. results show that water body is an important factor structuring the invertebrate assemblage early in the season, whereas microhabitat became more important later in the season. Structural complexity of microhabitats was related to the type of locomotion employed by invertebrates. Seasonal differences could be related to population dynamics （reproduction, mortality）. moreover, fluctuations in resource availability were expected to differ between the water bodies, with highest fluctuations in the eutrophic water body and with fluctuations becoming less predictable later in the season. This was confirmed by the data： species synchronization to pulses in food availability was strongest in the eutrophic water body. moreover, synchronization was strongest in summer, while in autumn waters were invaded by dispersive species. Based on these results a synthesis is presented on the functioning of the different waters during the different seasons.

关键词： dispersal fluctuations in resource availability food substrate synchronization

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Analytical Case Study on a Dedicated pigment in recycling processes of polyethylene

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Advances in Chemical Engineering and Science 2020年第3期10卷 181-189页

作者： Kees miermans Ellen dijkman petra Krystek The Netherlands Organization for Applied Scientific research (TNO) Unit Circular Economy and Environment-Environmental Modelling Sensing & Analysis (CEE-EMSA) Utrecht The Netherlands

The ability to track & trace materials is a key feature in the entire chain, and it ensures circularity principles. Examples from plastic recycling show the enormous added value that analytical technology can have for the circular economy. During polymer production and recycling processes, pigments can be added for different purposes;e.g. as colouring agent of the polymeric product but also as tracer for tracking process development and control in the final recycle products versus possible by-products. An analytical method for tracking the pigment Solvent Blue 15 in input materials, in intermediates as well as in recyclates was developed by tracing and quantifying an indicator metal which is copper (Cu). Therefore, suitable digestion procedures and a quantification method by high resolution inductively coupled plasma mass spectrometry (Hr-ICp-mS) were developed and used for measuring the polymeric digests. The method was tested on relevant samples from chemical recycling processes. The background concentrations in base/raw material are in the range of 0.05 - 0.1 mg·kg-1p>pan>pan> Cu. The processing concentrations are in the range of 4.2 to 28 mg·kg-1pan> Cu, while the pigment starting material (polyethylene, pE) has a concentration of arou

关键词： Cupper pigment Solvent Blue recycled polyethylene Track & Trace High resolution Inductively Coupled plasma mass Spectrometry (Hr-ICpmS)

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