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Evidence for Mesoproterozoic collision,deep burial and rapid exhumation of garbenschiefer in the Namaqua Front,South Africa

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Geoscience Frontiers 2020年第2期11卷 511-531页

作者： valby van schijndel David HCornell Robert Anczkiewicz Anders Schersten Department of Earth Sciences University of GothenburgSE-40530Sweden Department of Earth Sciences University of StellenboschPrivate Bag X1Matieland7602South Africa Institute of Geological Sciences Polish Academy of SciencesKrakow Research CentreUl.Senacka 131-002KrakowPoland Lund University Department of GeologyS€olvegatan 12SE-22362LundSweden University of Potsdam Institute of Earth and Environmental Sciences14476PotsdamGermany

Metamorphic provinces such as the^1 Ga Grenvillian,~400 Ma Caledonide and Triassic Qinling Provinces often contain rocks with high-pressure assemblages such as eclogites,which formed at mantle depths in subduction *** are evidence of the accretion of terranes by subduction of oceans and collision to form large tectonostratigraphic *** Mesoproterozoic Namaqua-Natal Province comprises a number of terranes thought to have been assembled by plate-tectonic processes,but they have generally yielded metamorphic pressures below 5 kbar,corresponding to<20 km,crustal depths,lacking evidence for subduction *** Kaaien Terrane in the Namaqua Front contains two large garbenschiefer units with the unusual paragenesis garnet-hornblende-epidote-white *** protoliths are graywackes influenced by andesitic volcanism during their deposition at^1870 Ma,in a passive margin of the Rehoboth Province or Kaapvaal *** garnet growth dated at 11655 Ma culminated in peak metamorphic conditions of 64530C and 10.40.7 kbar,corresponding to 40 km *** is attributed to subduction of these rocks before collision between the overriding arc-related Areachap Terrane,the Kaaien Terrane and the Kaapvaal-Rehoboth cratonic block during the Namaqua *** of the garbenschiefer slabs was followed by rapid cooling,as the 11435 Ma argon dates of hornblende and white mica,with closure temperatures^540C and^440C respectively,are the same within *** was probably due to tectonic juxtaposition of the garbenschiefer slab with much cooler rock *** exhumation was accommodated along the Trooilapspan-Brakbosch Shear Zone due to ongoing *** components of the Namaqua Front have distinctly different P-T-t paths,exemplified by greenschist metamorphism in the 1300 Ma Wilgenhoutsdrift Group,and medium-pressure metamorphism in the Areachap *** were juxtaposed by late-tectonic uplift and transpr

关键词： Collision orogeny P-T-t path Garbenschiefer Lu–Hf garnet U–Pb zircon 40Ar/39Ar dating

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Reply to comment by S.H.Büttner on “Evidence for Mesoproterozoic collision,deep burial and rapid exhumation of garbenschiefer in the Namaqua Front,South Africa”

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Geoscience Frontiers 2020年第5期11卷 1895-1899页

作者： valby van schijndel David H.Cornell Robert Anczkiewicz Anders Schersten Institute of Geosciences University of Potsdam14476PotsdamGermany Department of Earth Sciences University of GothenburgSE-40530GothenburgSweden Department of Earth Sciences University of StellenboschMatieland7602South Africa Institute of Geological Sciences Polish Academy of SciencesKrakow Research Centre31-002KrakowPoland Lund University Department of GeologySE-22362LundSweden

*** We thank *** for his comments on our paper(van schijndel et al.,2020),which allow us to clarify our work and the tectonic model we proposed for the eastern margin of the Namaqua Sector of the Namaqua Natal Metamorphic *** Kaaien Terrane forms a tectonic transition between the Kaapvaal Craton,Rehoboth Province,Kheis belt and the Archeachap Terrane of the Namaqua Sector and forms part of a NW-vergent foreland thrust sequence in the Namaqua Front(*** et al.,2006).The exact tectonic extent of the Kaaien Terrane is still unclear and it has recently been proposed to be part of the newly defined Kheis Terrane(van Niekerk and Beukes,2019).

关键词： Province. collision comment

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Application of the Shrinking Particle Model for the Evaluation of Molecular Recyclability of PET versus Semi-Aromatic Polyesters

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Open Journal of Physical Chemistry 2024年第2期14卷 21-35页

作者： Jack van schijndel Sanne de Krom Dennis Molendijk Koen van Beurden Amarante Böttger Research Group Biopolymers/Green Chemistry Centre of Expertise Safe & Resilient Society Avans University of Applied Science Breda Netherlands New Materials and Their Applications Centre of Expertise Safe & Resilient Society Avans University of Applied Science Breda Netherlands Department of Materials Science and Engineering Delft University of Technology Delft Netherlands

The molecular recyclability of poly (ethylene terephthalate) (PET) and three semi-aromatic polyesters poly (phloretic acid) (poly-H), poly (dihydroferulic acid) (poly-G), and poly (dihydrosinapinic acid) (poly-S) is evaluated in this study. PET is an extensively used aromatic polyester, and poly-H, poly-G, and poly-S can be considered semi-aromatic poly (lactic acid) modifications. All these polyesters have been depolymerized at neutral pH and by acid- and base-catalyzed hydrolysis at two temperatures, i.e., 50˚C and 80˚C. Base-catalyzed depolymerization of virgin PET leads to an isolated yield of 38% after 48 hours of reaction at 80˚C. Contrary to these results for PET, almost all the monomers of the semi-aromatic polyesters poly-H, poly-G, and poly-S are recovered with isolated yields larger than 90% at the same temperature after 15 minutes in a facile manner. A shrinking particle model used to determine the global kinetics of the base-catalyzed depolymerization showed that the rate rises with increasing temperature. Using the shrinking particle model, the intrinsic reaction rate constants were determined. It has been demonstrated that the rate coefficients of the depolymerization of the semi-aromatic polyesters poly-H, poly-G, and poly-S are between 2 and 3 orders of magnitude higher than those for PET.

关键词： Depolymerization Molecular Recycling Poly-H Poly-G Poly-S PET Circular Polymers

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Simplified thermal and hygric building models： A literature review

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Frontiers of Architectural Research 2012年第4期1卷 318-325页

作者： Rick Kramer Jos van schijndel Henk Schellen Deportment of the Built Environment Eindhoven University of Technology Eindhoven 5612 AZ The Netherlonds

This paper provides a systematic literature review on simplified building modelso Questions are answered like： What kind of modelling approaches are applied？ What are their （dis）advantages？ What are important modelling aspects？ The review showed that simplified building models can be classified into neural network models （black box）, linear parametric models （black box or grey box） and lumped capacitance models （white box）. Research has mainly dealt with network topology, but more research is needed on the influence of input parameters. The review showed that particularly the modelling of the influence of sun irradiation and thermal capacitance is not performed consistently amongst researchers. Furthermore, a model with physical meaning, dealing with both temperature and relative humidity, is still lacking. Inverse modelling has been widely applied to determine models parameters. Different optimization algorithms have been used, but mainly the conventional Gaus-Newton and the newer genetic algorithms. However, the combination of algorithms to combine their strengths has not been researched. Despite all the attention for state of the art building performance simulation tools, simplified building models should not be forgotten since they have many useful applications. Further research is needed to develop a simplified hygric and thermal building model with physical meaning.

关键词： Literature review Building performancesimulation Simplified buildingmodels Inverse modelling Climate change

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The simulation and mapping of building performance indicators based on European weather stations

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Frontiers of Architectural Research 2013年第2期2卷 121-133页

作者： A.W.M. van schijndel H.L. Schellen Built Environment BPS Built Environment BPS PO Box 513 Eindhoven University of TechnologyEindhoven 5600MB Netherlands

Due to the climate change debate, a lot of research and maps of external climate parameters are availtabte. However, maps of indoor climate performance parameters are still Lacking. This paper presents a methodology for obtaining maps of performances of similar buitdings that are virtually spread over whole Europe. The produced maps are useful for anaty-zing regional climate influence on building performance indicators such as energy use and indoor climate. This is shown using the Bestest building as a reference benchmark. An important application of the mapping tool is the visualization of potential building measures over the EU. Also the performances of singte building components can be simulated and mapped. It is concluded that the presented method is efficient as it takes less than 15min to simulate and produce the maps on a 2.6GHz/4GB computer. Moreover, the approach is applicable for any type of building.

关键词： Mapping Modeling Building Performance

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Evaluation of Inverse Modeling Techniques for Pinpointing Water Leakages at Building Constructions

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Modeling and Numerical Simulation of Material Science 2015年第1期5卷 15-25页

作者： A. W. M. van schijndel Unit Building Physics and Services Department of the Built Environment Eindhoven University of Technology Eindhoven Netherlands

The location and nature of the moisture leakages are sometimes difficult to detect. Moreover, the relation between observed inside surface moisture patterns and where the moisture enters the construction is often not clear. The objective of this paper is to investigate inverse modeling techniques as a tool for the detection of moisture leakage locations in building constructions from inside surface moisture patterns. It is concluded that although the presented methodology is promising, more research is needed to confirm its usability.

关键词： Inverse Modeling Building Construction Moisture Leakage

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Conversion of Syringaldehyde to Sinapinic Acid through Knoevenagel-Doebner Condensation

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Open Journal of Physical Chemistry 2016年第4期6卷 101-108页

作者： Jack van schijndel Luiz Alberto Canalle Jochum Smid Jan Meuldijk Research Group Biopolymers Centre of Expertise BioBased Economy Avans University of Applied Science Breda The Netherlands Department of Chemical Engineering and Chemistry Lab of Chemical Reactor Engineering/Polymer Reaction Engineering Eindhoven University of Technology Eindhoven The Netherlands

Sinapinic acid is a widespread compound in vegetable material and is as such common in the human diet. Recently it has drawn attention because of its biological activities. Sinapinic acid can be synthesized from syringaldehyde via the Knoevenagel-Doebner condensation. However this reaction is limited by the formation of 4-vinylsyringol after a second decarboxylation. To gain more detailed information about this reaction and to improve control over the formation of sinapinic acid, the concentration time history of syringaldehyde and the reaction products of this reaction have been monitored over time at different reaction temperatures. The formation of 4-vinylsyringol was found to be inhibited by performing the reaction at temperature below 80°C. This allows the reaction to be optimized for the production of sinapinic acid, with an optimal yield of 78% after 2.5 hours at 70°C.

关键词： Ligno-Phytochemicals Sinapinic Acid Knoevenagel-Doebner Condensation 4-Vinylsyringol

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MRI定量萎缩测量在疑似阿尔茨海默病病人诊断中的临床应用

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国际医学放射学杂志 2023年第1期46卷 118-118页

作者： S.Ingala I.S.van Maurik D.Altomare R.Wurm E.Dicks R.A.van schijndel 张谍

摘要目的疑似阿尔茨海默病的神经退行性变可以通过视觉评分或定量体积评估来确定。本研究对比分析灰质(GMV)和海马(HCV)体积测量与视觉评分表在教学型和非

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The Effect of Micro Air Movement on the Heat and Moisture Characteristics of Building Constructions

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Journal of Civil Engineering and Architecture 2010年第10期4卷 9-15页

作者： A.W.M. （Jos） van schijndel Eindhoven University of Technology Eindhoven Netherlands

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MRI减影技术在检出阿尔茨海默病病人淀粉样蛋白相关影像异常(水肿或积液)中的价值:一项观察者研究

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国际医学放射学杂志 2018年第3期 364-365页

作者： R.M.Martens A.Bechten S.Ingala R.A.van schijndel V.B.Machado M.C.de Jong 史洪建 Department of Radiology and Nuclear Medicine Neuroscience Campus Amsterdam VU University Medical Center

摘要背景针对阿尔茨海默病(AD)β淀粉样斑块的免疫治疗可引起伴有水肿或积液的淀粉样蛋白相关影像异常(ARIA-E),其检出和分类对于评估参与临床试验的受试者

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