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Boosting CO_(2) hydrogenation to high-value olefins with highly stable performance over Ba and Na co-modified Fe catalyst

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Journal of Energy Chemistry 2023年第5期80卷 614-624,I0014页

作者： Joshua Iseoluwa Orege Na Liu Cederick Cyril Amoo Jian Wei Qingjie Ge Jian Sun Dalian National Laboratory for Clean Energy Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China university of chinese academy of Sciences Beijing 100049China

CO_(2)hydrogenation has been considered to be a highly promising route for the production of high-value olefins(HVOs)while also mitigating CO_(2)***,it is challenging to achieve high selectivity and maintain stable performance for HVOs(ethylene,propylene,and linear a-olefins)over a prolonged reaction time due to the difficulty in precise control of carbon coupling and rapid catalyst ***,we present a selective Ba and Na co-modified Fe catalyst enriched with Fe_(5)C_(2)and Fe_(3)C active sites that can boost HVO synthesis with up to 66.1%selectivity at an average CO_(2)conversion of 38%for over 500 *** to traditional NaFe catalyst,the combined effect of Ba and Na additives in the NaBaFe-0.5 catalyst suppressed excess oxidation of FeCxsites by H_(2)*** absence of Fe3O4phase in the spent NaBaFe-0.5 catalyst reflects the stabilization effect of the co-modifiers on the *** study provides a strategy to design Fe-based catalysts that can be scaled up for the stable synthesis of HVOs from CO_(2)hydrogenation.

关键词： CO_(2)hydrogenation High-value olefins Barium additive Iron carbide Catalytic stability

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Integrated design of transport infrastructure and public spaces considering human behavior:A review of state-of-the-art methods and tools

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Frontiers of Architectural Research 2019年第4期8卷 429-453页

作者： Liu Yang Koen Hvan Dam Amab Majumdar Bani Anvari Washington YOchieng Lufeng Zhang Center of Architecture Research and Design University of Chinese Academy of Sciences100190BeijingChina Centre for Transport Studies Deptof Civil and Environmental EnQineerinqImperial Colleqe LondonLondonSW72AZUK Centre for Process Systems Engineering Deptof Chemical EngineerinsImperial College LondonLondonSW72AZUK Centre for Transport Studies Deptof CivilEnvironmental and Geomatic EngineeringUniversity College LondonWC1E 6BTUK

In order to achieve holistic urban plans incorporating transport infrastructure,public space and the behavior of people in these spaces,integration of urban design and computer modeling is a promising way to provide both qualitative and quantitative support to *** paper describes a systematic literature review following a four-part ***,to understand the relationship of elements of transport,spaces,and humans,w e review policy and urban design strategies for promoting positive ***,we present an overview of the integration methods and strategies used in urban design and policy ***,metrics and approaches for evaluating the effectiveness of integrated plan alternatives are ***,this paper gives a review of state-of-the-art tools with a focus on seven com puter simulation *** article explores mechanisms underlying the complex system of transport,spaces,and humans from a multidisciplinary perspective to provide an integrated toolkit for designers,planners,modelers and decision-m akers with the current methods and their challenges.

关键词： Transport infrastructure Public space Human behavior Integrated design Decision support Computer simulation

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Borana rangeland of southern Ethiopia:Estimating biomass production and carrying capacity using field and remote sensing data

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Plant Diversity 2022年第6期44卷 598-606页

作者： Yeneayehu Fenetahun You Yuan Xin-Wen Xu Yong-Dong Wang National Engineering Technology Research Center for Desert-Oasis Ecological Construction Xinjiang Institute of Ecology and GeographyChinese Academy of Sciences818 South Beijing RoadUrumqi 830011XinjiangChina university of chinese academy of Sciences Beijing100049China

Assessing rangeland productivity is critical to reduce ecological degradation and promote sustainable livestock ***,we estimated biomass productivity and carrying capacity dynamics in the Borana rangeland of southern Ethiopia by using field-based data and remote sensing data(i.e.,normalized difference vegetation index(NDVI)).Data was collected from both rainy and dry seasons when biomass production was high and low *** of linear regression showed that both biomass production(R^(2)_(adj)=0.672)and NDVI value(R^(2)_(adj)=0.471)were significantly decreased from 1990 to *** data and NDVI values for mean annual biomass showed a significant linear *** model accuracy in the annual relationship between the observed and predicted biomass values was strong(R^(2)_(adj)=0.986)but with high standard error,indicating that the observed biomass production in the rangeland area was not in good condition as compared with the predicted *** study suggests that,using NDVI data and field-based data in combined way has high potential to estimate rangeland biomass and carrying capacity dynamics at extensively grazed arid and semi-arid *** to use for estimating stoking rates and predicting future management techniques for decision making.

关键词： NDVI Biomass Carrying capacity Rangeland Borana Season

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中国西南热带季风区石灰岩和非灰岩森林蕨类植物叶片性状的种间和种内适应性

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Journal of Plant Ecology 2023年第6期16卷 146-157页

作者： Kittisack Phoutthavong Masatoshi Katabuchi Akihiro Nakamura Xiao Cheng Min Cao CAS Key Laboratory of Tropical Forest Ecology Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesMenglunMengla 666303China university of chinese academy of Sciences Beijing 100049China Center of Plant Ecology Core Botanical GardensChinese Academy of SciencesMenglunMengla 666303China Kunming Institute of Botany Chinese Academy of SciencesKunming 650201China

在热带地区,石灰山森林(LFs)和非石灰山森林(NLFs)之间的植物通常表现出不同的分类学和功能型特征。蕨类植物是热带雨林的主要组成成分之一。然而,我们对LFs中分布的蕨类植物的形态和生理特征了解甚少。在本项研究中,我们评估了中国西... 详细信息

在热带地区,石灰山森林(LFs)和非石灰山森林(NLFs)之间的植物通常表现出不同的分类学和功能型特征。蕨类植物是热带雨林的主要组成成分之一。然而,我们对LFs中分布的蕨类植物的形态和生理特征了解甚少。在本项研究中,我们评估了中国西南热带地区LFs和NLFs中的蕨类植物物种在7个叶片功能性状上的差异。我们测量了25种蕨类植物的叶片水分含量、形态特征(包括叶片大小、叶片厚度、气孔长度和气孔密度),以及生理特征(包括气孔导度和光合速率)。研究结果表明,与NLFs相比,LFs中蕨类植物的叶片更厚、更小,气孔密度和气孔导度更低,这可能反映了它们的水分利用策略。然而,当考虑系统发育关系时,这些差异变得不显著了,这表明系统发育保守性影响了LFs和NLFs的性状差异并最终影响了物种组成。在LFs和NLFs中共同出现的一些物种具有一定的种内性状变异,在LFs中气孔密度更低。这些发现表明,只有少数蕨类植物的水分利用策略能够同时适应LFs和NLFs,因此蕨类植物不太可能发生适应性辐射。

关键词：干旱蕨类石灰山森林蕨类植物叶片功能性状西双版纳

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壳聚糖基原位水凝胶作为肺栓塞剂的应用研究（英文）

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Science Bulletin 2015年第2期60卷 235-240,I0002页

作者： Titima Songkroh 谢红国于炜婷吕国军刘袖洞王林孙广炜徐小溪马小军 Dalian Institute of Chemical Physics Chinese Academy of Sciences university of chinese academy of Sciences College of Environment and Chemical Engineering Dalian University Affiliated Zhongshan Hospital of Dalian university

肺气肿是终末细支气管至肺泡内持续含气量过多、过度膨胀使弹力组织破坏的常见慢性阻塞性肺疾病,临床表现为不可逆气流受限、胸闷、气促、重则呼吸衰竭.通过栓塞支气管使肺不张以达到肺减容目的的治疗方法因其能够避免外科手术风险而被... 详细信息

肺气肿是终末细支气管至肺泡内持续含气量过多、过度膨胀使弹力组织破坏的常见慢性阻塞性肺疾病,临床表现为不可逆气流受限、胸闷、气促、重则呼吸衰竭.通过栓塞支气管使肺不张以达到肺减容目的的治疗方法因其能够避免外科手术风险而被广泛关注.本研究的目的是基于具有良好生物相容性的壳聚糖水凝胶制备一种可注射的原位水凝胶,考察该体系的凝胶时间、凝胶强度及细胞毒性等,并将其应用于肺栓塞以达到肺减容.研究结果表明,壳聚糖/京尼平/磷酸钠原位可注射水凝胶的凝胶时间为8 min,凝胶强度195 Pa,在生理条件下膨胀率超过100%;小鼠成纤维细胞(3T3)与凝胶接触48 h后细胞活性仍保持80%以上,表明凝胶无生物毒性;将该水凝胶注射入狗的肺细支气管,胸部CT显示水凝胶在定位的细支气管中形成栓塞,3周后在支气管肺段发生了局部肺不张,达到了肺减容的目的.

关键词：肺气肿原位形成壳聚糖密封剂水凝胶减容生物傅里叶变换红外光谱

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