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第十届全国激波与激波管学术讨论会

作者： m.e.h.van dongen X.Luo G.Lamanna D.J.van Kaathoven Technische Universiteit eindhoven P.O Box 5135600 MB EindhovenThe Netherlands

effects of heat release due to cloud formation in compressible flows are discussed. It is shown that the onset of a localized constant heat flux to a 1D compressible flow leads to the generation of up

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非定常流中水的非平衡相变

非定常流中水的非平衡相变

Contrasting sorption behaviours affecting groundwater arsenic concentration in Kandal Province,Cambodia

中国力学学会学术大会'2009

作者：罗喜胜程万 m.e.h.van dongen 中国科技大学近代力学系

通过对水非平衡相变的成核过程、液滴增长过程、液滴蒸发过程和去核化过程进行综合分析,结合hill的矩方法,建立了用于伴随非平衡相变可压缩流动的物理模型,并在此基础上发展了两套数值方法(ASCe2D方法和CeSe方法),提供了数值和理论研究... 详细信息

通过对水非平衡相变的成核过程、液滴增长过程、液滴蒸发过程和去核化过程进行综合分析,结合hill的矩方法,建立了用于伴随非平衡相变可压缩流动的物理模型,并在此基础上发展了两套数值方法(ASCe2D方法和CeSe方法),提供了数值和理论研究的平台。

关键词：非平衡相变脉冲膨胀管 Ludwieg管 CeSe方法

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Geoscience Frontiers 2019年第5期10卷 1701-1713页

作者： Laura A. Richards maria J. Casanueva-marenco Daniel magnone Chansopheaktra Sovann Bart e. van dongen David A. Polya School of earth and environmental Sciences and Williamson Research Centre for molecular environmental Science The University of ManchesterWilliamson BuildingOxford RoadManchesterM13 9PLUK Department of Analytical Chemistry Institute of BiomoleculesFaculty of SciencesUniversity of CádizCádizSpain School of Geography University of LincolnBrayford PoolLincolnLincolnshireLN6 7TSUK Department of environmental Science Royal University of Phnom PenhPhnom PenhCambodia

Natural arsenic (As) contamination of groundwater which provides drinking water and/or irrigation supplies remains a major public health issue,particularly in South and Southeast Asia.A number of studies have evaluated various aspects of the biogeochemical controls on As mobilization in aquifers typical to this region,however many are predicated on the assumption that key biogeochemical processes may be deduced by sampled water *** validity of this assumption has not been clearly established even though the role of sorption/desorption of As and other heavy metals onto Fe/mn (hydr) oxides is an important control in As ***,selective chemical extractions of sand-rich and clay-rich sediments from an As-affected aquifer in Kandal Province,Cambodia,were undertaken to explore the potential role of partial re-equilibrium through sorption/desorption reactions of As and related solutes (Fe,mn and P) between groundwater and the associated solid aquifer *** general,groundwater As is strongly affected by both ph and eh throughout the study ***,contrasting sorption behaviour is observed in two distinct sand-dominated (T-Sand) and clay dominated (T-Clay) transects,and plausibly attributed to differing dominant lithologies,biogeochemical and/or hydrogeological ***/desorption processes appear to be re-setting groundwater As concentrations in both transects,but to varying extents and in different *** T-Sand,which is typically highly reducing,correlations suggest that dissolved As may be sequestered by sorption/re-adsorption to Fe-bearing mineral phases and/or sedimentary organic matter;in T-Clay eh is a major control on As mobilization although binding/occlusion of Fe-bearing minerals to sedimentary organic matter may also *** linear regression analysis was conducted with groups categorised by transect and by eh,and the output correlations support the contrasting sorption behaviours encountered in this study area.I

关键词： Arsenic Groundwater Partial equilibrium Sorption Water-rock interactions Cambodia

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本科教学实验肉桂酸的制备及定性、定量分析

分析仪器 2024年第2期 94-96页

作者：梁向晖林东恩华南理工大学化学与化工学院广东省功能分子工程重点实验室广州510640

以苯甲醛和醋酸酐为原料,无水碳酸钾或醋酸钾作为碱性催化剂,经Perkin反应制备肉桂酸。通过熔点、红外光谱、核磁共振氢谱、碳谱对所得产物进行定性分析,并用核磁共振氢谱完成定量分析。结果表明碳酸钾法在核磁收率上优于醋酸钾法。

关键词：肉桂酸 Perkin反应催化剂定性分析核磁定量分析

Dissolved organic matter tracers reveal contrasting characteristics across high arsenic aquifers in Cambodia:A fluorescence spectroscopy study

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Geoscience Frontiers 2019年第5期10卷 1653-1667页

作者： Laura A. Richards Dan J. Lapworth Daniel magnone Daren C. Gooddy Lee Chambers Peter J. Williams Bart e. van dongen David A. Polya School of earth and environmental Sciences and Williamson Research Centre for molecular environmental Science The University of ManchesterWilliamson BuildingOxford RoadManchesterM13 9PLUK British Geological Survey Maclean BuildingWallingfordOxfordshireOX10 8BBUK Lancaster environment Centre Lancaster UniversityLancaster LA1 4YQUK Present address: School of Geography University of LincolnBrayford PoolLincolnLincolnshireLN6 7 TSUK Present address: Department of Civil and environmental engineering University of StrathclydeGlasgow G1 1XJUK

Organic matter in the environment is involved in many biogeochemical processes,including the mobilization of geogenic trace elements,such as arsenic,into *** this paper we present the use of fluorescence spectroscopy to characterize the dissolved organic matter (DOm) pool in heavily arsenicaffected groundwaters in Kandal Province,*** fluorescence DOm (fDOm) characteristics between contrasting field areas of differing dominant lithologies were compared and linked to other hydrogeochemical parameters,including arsenic and dissolved methane as well as selected sedimentary ***-corrected fluorescence indices were used to characterize depth profiles and compare field *** fDOm was generally dominated by terrestrial humic and fulvic-like components,with relatively small contributions from microbially-derived,tryptophan-like *** fDOm from sand-dominated sequences typically contained lower tryptophan-like,lower fulvic-like and lower humic-like components,was less bioavailable,and had higher humification index than clay-dominated *** concentrations were strongly correlated with fDOm bioavailability as well as with tryptophan-like components,suggesting that groundwater methane in these arsenic-prone aquifers is likely of biogenic origin.A comparison of fDOm tracers with sedimentary Om tracers is consistent with the hypothesis that external,surface-derived contributions to the aqueous DOm pool are an important control on groundwater hydrogeochemistry.

关键词： Arsenic Fluorescence spectroscopy Organic matter characterization Parallel factor analysis (PARAFAC) Groundwater quality

融合课程思政与创新思维的有机化学教学探索与实践

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大学化学 2024年第2期39卷 286-291页

作者：尹标林邓远富林东恩华南理工大学化学与化工学院广州510641

在化学强基班中进行了课程思政、创新思维和有机化学课程教学深度融合的探索。课堂上精心选择教学案例,利用知识的多重价值,实现知识传授、价值引领与创新能力培养的有机结合。课后组织学生进行文献调研活动,以达到夯实基础、拓宽视野... 详细信息

在化学强基班中进行了课程思政、创新思维和有机化学课程教学深度融合的探索。课堂上精心选择教学案例,利用知识的多重价值,实现知识传授、价值引领与创新能力培养的有机结合。课后组织学生进行文献调研活动,以达到夯实基础、拓宽视野的创新思维训练目的,最终实现教育立德树人的根本任务。

关键词：化学强基班教学课程思政创新思维培育融合教学

维普期刊数据库博看期刊

Visible light induced oxidative coupling of purines with arenes

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Chinese Chemical Letters 2023年第3期34卷 313-316页

作者： Lamei Liao dongen Lin Gary histand Key Laboratory of Functional molecular engineering of Guangdong Province School of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhou 510641China The International School of Advanced materials School of Material Science and EngineeringSouth China University of TechnologyGuangzhou 510640China

The photocatalyzed synthesis of 9-arylpurines has been developed using 9h-purines and non-activated *** method is highly atom economical using an acridinium photocatalyst induced by visible light under air atmosphere ... 详细信息

关键词： Visible light Photocatalysis Purine derivatives C–N bond formation Additive free

Controlled synthesis of Ce(Oh)CO_3 flowers by a hydrothermal method and their thermal conversion to CeO_2 flowers

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Particuology 2012年第6期10卷 771-776页

作者： dongen Zhang Feng Li Jian Gu Qing Xie Shanzhong Li Xiaobo Zhang Guiquan han Ailing Ying Zhiwei Tong Department of Chemical engineering Huaihai Institute of Technology SORST Japan Science and Technology Agency(JST)Japan College of Chemistry China University of Mining and Technology

highly uniform Ce（Oh）CO3 flowers were successfully prepared in large quantities using a facile hydrothermal approach from the reaction of Ce（Nh4）（NO3）4 with CO（Nh2）2 at 160℃ in a water-N2h4 complex. The influences of the N2h4 content and temperature on flower formation were discussed. CeO2 flowers were prepared by thermal conversion of Ce（Oh）CO3 flowers at 500 ℃ in air. Both Ce（Oh）CO3 and CeO2 flowers were characterized by X-ray powder diffraction （XRD）, and scanning electron microscopy （Sem）. The UV-vis adsorption spectrum of the CeO2 flowers showed that the band gap energy （eg） is 2.66 eV, which is lower than that of bulk ceria.

关键词： Crystal growth Flowers Self-assembly

Fuel Consumption Potential of the Pushbelt CVT

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重庆理工大学学报（自然科学） 2011年第7期25卷 1-13页

作者： van der Sluis, Francis van dongen, Tom van Spijk, Gert-Jan van der Velde, Arie van heeswijk, Ad van Doorne＇ s Transmissie-Bosch Group Netherlands

The efforts to further reduce fuel consumption of vehicles equipped with a pushbelt type Continuously Variable Transmission(CVT) focus on different sources of *** this paper the magnitude of these losses and their potential for reduction is *** the CVT,the variator,its control strategy and the hydraulic actuation circuit can be distinguished as the main potentials.A major opportunity is offered by a new control strategy that takes the actual slip between belt and pulley as the control *** resulting decrease of clamping forces on the pushbelt leads to a reduction of variator and actuation *** potential is found in the hydraulic actuation circuit by an improved tuning of the power supply to the actual power *** the CVT additional potential is found in start-stop functionality as supported by measures inside the *** paper describes the theoretical background as well as practical fuel savings of up to 5.5% that were obtained in tests on vehicle *** control adds an inherent robustness to the operation of the pushbelt and opens up the fuel saving potential of the CVT thus reinforcing its position as the benchmark for the near future.

关键词： CVT pushbelt fuel consumption reduction control strategy hydraulics