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Optimizing the oxide support composition in Pr-doped CeO_(2) towards highly active and selective Ni-based CO_(2) methanation catalysts

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Journal of Energy Chemistry 2022年第8期31卷 547-561,I0015页

作者： Anastasios I.Tsiotsias Nikolaos D.Charisiou Ayesha Alkhoori Safa Gaber Vlad Stolojan Victor Sebastian Bart van der Linden Atul Bansode Steven J.Hinder Mark A.Baker kyriaki Polychronopoulou maria A.Goula Laboratory of Alternative Fuels and Environmental Catalysis(LAFEC) Department of Chemical EngineeringUniversity of Western MacedoniaGR-50100Greece Department of Mechanical Engineering Khalifa University of Science and TechnologyAbu DhabiP.O.Box 127788United Arab Emirates Center for Catalysis and Separations Khalifa University of Science and TechnologyAbu DhabiP.O.Box 127788United Arab Emirates Advanced Technology Institute Department of Electrical and Electronic EngineeringUniversity of SurreyGuildford GU24DLUK Department of Chemical Engineering and Environmental Technology Universidad de ZaragozaCampus Río Ebro-Edificio I+D50018 ZaragozaSpain Instituto de Nanociencia y Materiales de Aragón(INMA) Universidad de Zaragoza-CSICc/María de Luna 350018 ZaragozaSpain Networking Research Center on Bioengineering Biomaterials and NanomedicineCIBERBBN28029 MadridSpain Department of Chemical Engineering Delft University of TechnologyVan der Massweg 92629 HZ DelftThe Netherlands The Surface Analysis Laboratory Faculty of Engineering and Physical SciencesUniversity of SurreyGuildford GU24DLUK

In this study,Ni catalysts supported on Pr-doped Ce O_(2) are studied for the CO_(2) methanation reaction and the effect of Pr doping on the physicochemical properties and the catalytic performance is thoroughly *** is shown,that Pr^(3+)ions can substitute Ce^(4+)ones in the support lattice,thereby introducing a high population of oxygen vacancies,which act as active sites for CO_(2) *** doping can also act to reduce the crystallite size of metallic Ni,thus promoting the active metal *** performance evaluation evidences the promoting effect of low Pr loadings(5 at%and 10 at%)towards a higher catalytic activity and lower CO_(2) activation *** the other hand,higher Pr contents negate the positive effects on the catalytic activity by decreasing the oxygen vacancy population,thereby creating a volcano-type trend towards an optimum amount of aliovalent substitution.

关键词： Power-to-gas CO_(2)methanation Ni-based catalyst Pr-doped CeO_(2) Oxygen vacancy Catalytic activity Activation energy

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Estimation of Throughfall Erosivity in a Highly Diverse Forest Ecosystem Using Sand-Filled Splash Cups

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Journal of Earth Science 2010年第6期21卷 897-900页

作者： Christian Geiβler Peter kühn 史学正 Thomas Scholten Chair of Physical Geography and Soil Science Eberhard Karls University Tübingen Institute of Soil Science Chinese Academy of Sciences

Sand-fflled splash cups were used to study the erosive power of rainfall and throughfall in the humid subtropics of Southeast China. The splash cup measurements yielded precise and reproducible results under both open field conditions and forest vegetation. The splash cups were exposed to specific forest stands of different ages and to selected species （Schima superba, Castanopsis eyrei, Daphniphyllum oldhamii, Lithocarpus glaber） in the Gutianshan （古田山） National Nature Reserve （GNNR）. The results of the measurements under forest vegetation show that the erosive power of throughfall drops to be 2.59 times higher compared to the open field. This accentuates the importance of shrub, herb and litter layers in forest ecosystems to protect the soil against erosion. Coalescing drops from leaves and branches （drips） are responsible for this notable gain in erosive power. Moreover, differences in sandloss between the investigated tree species （deciduous, evergreen） revealed that the erosion potential and the spatial heterogeneity of throughfall are species-specific. This highlights the importance of selecting specific species for afforestation projects considering the prevention of soil erosion.

关键词： Biodiversity and Ecosystem Functioning (BEF)-China biodiversity soil erosion soil erosion experiment splash cup throughfall erosivity.

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Three-body hadronic molecules

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Chinese Physics C 2010年第9期34卷 1286-1289页

作者： k.P.khemchandani A.Martínez Torres E.Oset Centro de Física Téorica Departamento de FísicaUniversidade de Coimbra Departamento de Física Teórica and IFIC Centro Mixto Universidad de Valencia-CSIC

In this talk,I discuss our recent studies of three-hadron systems and the resonances found *** studies consist of solving Faddeev equations with the input two body interactions obtained from the chiral *** systems which we study are either made of two mesons and a baryon or of three *** motivation for these studies comes from the data on many baryon resonances,especially the ones with J ^π = 1/2 ^＋,which show a large branching ratio to the two meson-one baryon decay *** addition to this,several new studies at BES,BELLE,BABAR etc.,claim the existence of new meson resonances which seem to couple strongly to three-meson systems,where mostly two out of the three mesons appear as a known ***,we have studied two meson-one baryon systems with strangeness =-1,0 and 1 and three-meson systems made of two-pseudoscalars and a vector *** we will show in this manuscript,we find many resonances which couple to three-hadrons.

关键词： hadron resonances few-body systems.If

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Annual dose rate for Qena governorate population due to consume the animal products

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Nuclear Science and Techniques 2010年第2期21卷 76-79页

作者： S. Harb k. Sahalel Din A. Abbady Nagwa Saad Physics Department Faculty of Science South Valley University Qena 83523 Egypt

In this work, the natural radionuclide concentrations of the 226Ra, 228Ra, 232Th and 40k were estimated from samples of cattle and poultry fodder, South Valley University farms and Qena Governorate farm, Qena, Upper Egypt. The radionuclide concentrations and annual consumption rate of twenty-nine animal fodders were analyzed using low-level γ-spectrometer, including a mixture fodder, silage, hay, rice straw, and poultry fodder. The irradiation risk of human health was assessed due to indirect ingestion of the beef, milk, poultry and egg, the annual effective dose of the radionuclides for the local consumer was 2.7, 14, 0.1, and 0.14 μSv·y–1, respectively.

关键词：消费者动物产品天然放射性核素剂量率人口家禽饲料动物饲料混合饲料

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Optical Anisotropy of InAs Monolayer in (311)-Oriented GaAs Matrix

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Chinese Physics Letters 1997年第12期14卷 932-935页

作者： y.H.Chen Z.yang XU Bo WANG Zhan-guo LIANG Ji-ben Department of Physics Hong Kong University of Science and TechnologyClear Water BayKowloonHong Kong Laboratory of Semiconductor Materials Science lnstitute of SemiconductorsChinese Academy of SciencesBeijing 100083 On leave from Laboratory of Semiconductor Materials Science Institute of SemiconductorsChineseAcademy of SciencesBeijing 100083

In-plane optical anisotropy which comes from the heavy hole and the light hole transitions in an InAs monolayer inserted in(311)-oriented GaAs matrix is observed by reflectance difference *** observed steplike density of states demonstrates that the InAs layer behaves like a two-dimensional quantum well rather than isolated quantum *** magnitude of the anisotropy is in good agreement with the intrinsic anisotropy of(311)orientation quantum wells,indicating that there is little structural or strain anisotropy of the InAs layer grown on(311)-oriented GaAs surface.

关键词： anisotropy quantum reflectance

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Differences in seed dormancy and germination in amphicarpic legumes:manifold bet-hedging in space and time

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Journal of Plant Ecology 2021年第4期14卷 662-672页

作者： Ricardo Sanchez-Martin Jose maria Gomez Pierre-Olivier Cheptou Rafael Rubio de Casas Departamento Ecologia Vegetal Centro de Investigaciones sobre Desertificacion(CIDE-CSIC-UV-GV)Carretera de Moncada-Naquera Km 4546113 MoncadaValenciaSpain Departamento de Ecologia Funcional y Evolutiva Estacion Experimental de Zonas AridasEEZA-CSICCtra.de Sacramento s/nLa Cañada de San Urbano04120 AlmeriaSpain Centre d’Ecologie Fonctionnelle et Evolutive(CEFE) CEFE UMR 5175CNRSUniversite de MontpellierUniversite Paul-Valery7 MontpellierEPHE1919 route de Mende34293 Montpellier Cedex 05France Departamento de Ecologia Universidad de GranadaAvda.de Fuentenueva s/n18071 GranadaSpain

Aims Dispersal through space or time via dormancy is one of the primary processes whereby organisms can influence the environment they *** plants,strong evolutionary correlations are expected between the two kinds of dispersal because both are performed by the seeds and play comparable adaptive *** this paper,we investigated these evolutionary correlations using amphicarpic plants,which simultaneously produce aerial seeds with high spatial dispersal propensity and subterranean seeds that do not *** We investigated the variation in dormancy and germination in aerial and subterranean seeds of two amphicarpic legumes(Vicia amphicarpa *** Lathyrus amphicarpos L.)and two closely related homocarpic taxa(Vicia sativa *** Lathyrus cicera L.)by estimating germination percentages following different combinations of dormancy breaking treatments(*** after-ripening,cold stratification and physical scarification).Important Findings Our results showed complex interactions between spatial and temporal *** after dispersal,aerial seeds were more dormant than their subterranean counterparts,but this trend reversed with after-ripening,as seeds developed physical *** of homocarpic plants germinated at higher percentages than those of their amphicarpic congeners and lost dormancy homogeneously with ***,amphicarpic seeds exhibited varied dormancy strategies modulated by both physiological and physical *** are expected to increase variation in emergence timing,providing multiple levels of diversifying *** strategy might be adaptive under highly unpredictable conditions by enabling plants to rely on historically favorable sites in good seasons without preventing spatial and temporal migration.

关键词： amphicarpy dormancy/colonization trade-off amphicarpic legumes environmental heterogeneity seed dormancy and germination Mediterranean environments

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广州李坑垃圾场渗滤液中的藻类群落结构特征

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中山大学学报（自然科学版） 2006年第5期45卷 93-96,101页

作者：林里姜必亮陈玉成蓝崇钰中山大学生命科学学院/有害生物控制与资源利用国家重点实验室广东广州510275 香港理工大学应用生物与化学技术系

对广州李坑生活垃圾填埋场渗滤液池的藻类群落结构进行为期1 a的调查。共发现藻类20种,分别归蓝藻门、绿藻门和硅藻门。其中,优势种类是蓝藻门中的席藻Phorm idium spp.。渗滤液中藻类数量和生物量的年平均值分别为13.47×108ind.L-1和1... 详细信息

对广州李坑生活垃圾填埋场渗滤液池的藻类群落结构进行为期1 a的调查。共发现藻类20种,分别归蓝藻门、绿藻门和硅藻门。其中,优势种类是蓝藻门中的席藻Phorm idium spp.。渗滤液中藻类数量和生物量的年平均值分别为13.47×108ind.L-1和144.70 ***-1。藻类生物量的年动态表现为冬春高、夏秋低,生物量最高的2月份达352.81 mg.L-1,最小的8月为20.50 ***-1。渗滤液中藻类群落的Shannon-W iever多样性指数的年变化类似于群落生物量的格局。渗滤液藻类生物量、群落多样性和优势种席藻的生物量与月平均温度、月雨量和NH+4-N呈负相关关系,而与COD、NO3--N、TP、O rtho-P呈正相关关系。

关键词：垃圾填埋场渗滤液藻类环境因素

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Can eastern wisdom resolve western epidemics? Traditional Chinese medicine therapies and the opioid crisis

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Journal of Integrative Medicine 2021年第4期19卷 295-299页

作者： Thomas Efferth An-long Xu Roxana Damiescu Mita Banerjee Norbert W.Paul David y.W.Lee Department of Pharmaceutical Biology Institute of Pharmacy and BiochemistryJohannes Gutenberg University55128 MainzGermany School of Life Science Beijing University of Chinese MedicineBeijing 100029China Obama Institute of Transnational American Studies Department of English and LinguisticsJohannes Gutenberg University55128 MainzGermany Institute for the History Philosophyand Ethics of MedicineJohannes Gutenberg University Medical Center55131 MainzGermany Harvard Medical School McLean HospitalBostonMA 02115USA

The widespread use of opioids to treat chronic pain led to a nation-wide crisis in the United States. Tens of thousands of deaths annually occur mainly due to respiratory depression, the most dangerous side effect of opioids. Non-opioid drugs and non-pharmacological treatments without addictive potential are urgently required. Traditional Chinese medicine(TCM) is based on a completely different medical theory than academic Western medicine. The scientific basis of acupuncture and herbal treatments as main TCM practices has been considerably improved during the past two decades, and large metaanalyses with thousands of patients provide evidence for their efficacy. Furthermore, opinion leaders in the United States favor non-pharmacological techniques including TCM for pain management to fight the opioid crisis. We advocate TCM as therapeutic option without addictive potential and without lifethreatening side effects(e.g., respiratory depression) to treat chronic pain patients suffering from opioid misuse. The evidence suggests that:(1) opioid misuse cannot be satisfactorily managed with standard medication;(2) opinion leaders in the United States favor to consider non-opioid and nonpharmacological treatment strategies including those from TCM to treat acute and chronic pain conditions;(3) large meta-analyses provide scientific evidence for the clinical activity of acupuncture and herbal TCM remedies in the treatment of chronic pain. Future clinical trials should demonstrate the safety of TCM treatments if combined with Western medical practices to exclude negative interactions between both modalities.

关键词： Traditional Chinese medicine Acupuncture Addiction Opioid crisis Pain

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四川盆地北部上三叠统须家河组高成熟煤系烃源岩芳烃热演化与应用

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中国科学：地球科学 2015年第11期45卷 953-962页

作者：李颖朱扬明郝芳邹华耀郭彤楼浙江大学地球科学系杭州310027 中国地质大学资源学院武汉430074 中国石油大学地球科学学院北京102249 中国石化勘探南方分公司成都610000

基于40余个芳烃组分的GC-MS及相关分析资料，阐明了四川盆地北部上三叠统须家河组煤系烃源岩在成熟晚期到过成熟阶段（Ro=1．13％-2．85％）芳烃组成的热演化特征，并剖析了适用于高一过成熟烃源岩有机质生源和沉积环境判识的芳烃指标... 详细信息

基于40余个芳烃组分的GC-MS及相关分析资料，阐明了四川盆地北部上三叠统须家河组煤系烃源岩在成熟晚期到过成熟阶段（Ro=1．13％-2．85％）芳烃组成的热演化特征，并剖析了适用于高一过成熟烃源岩有机质生源和沉积环境判识的芳烃指标．研究结果表明，在高热演化阶段这些烃源岩中低碳环数的萘及菲系列随成熟度增高而减少，而苊、苯并萤葸、苯并[e]芘等高碳环数化合物逐渐相对富集，且母体化合物趋于增多，是高地温条件下的裂解和持续的脱氢作用所引起的聚合反应所致．它们的MPI-值随成熟度（R。）呈两段式线性变化趋势，在Ro〈1．80％时随之升高，Ro〉1．8％时降低，两者的关系式分别为Ro=0．98MP11＋0．37和Ro=-0．90MPI1＋3．02，不同于前人的结果．当Ro值高于1．1％时二苯并呋喃类化合物开始急剧减少，导致芳烃三芴系列组成发生显著变化，因而不适用于高一过成熟煤系烃源岩的沉积环境识别,4-／1-MDBT比值可作为反映有机相变化的有效指标，能区分高成熟煤与泥岩．2,6-／2，10-DMP，1,7-／1，9-DMP比值和三芳甾烷丰度可作为高演化烃源岩的有机质生物源参数，能指示陆源输入与水生生物贡献的大小．

关键词：高成熟烃源岩芳烃甲基菲指数三芴系列须家河组四川盆地

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DISCRETE PARTICLE SIMULATION OF SIZE SEGREGATION OF PARTICLE MIXTURES IN A GAS FLUIDIZED BED

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China Particuology 2006年第3期4卷 122-126页

作者： y. Q. Feng A. B. yu Center for Simulation and Modelling of Particulate Systems School of Materials Science and Engineering The University of New South Wales Sydney NSW 2052 Australia Divisions of Minerals Commonwealth Scientific and Industrial Research Organization Box 312 Clayton South Victoria 3169 Australia

This paper presents a study of the mixing/segregation behaviour of particle mixtures in a gas fluidized bed by use of the discrete particle simulation. Spherical particles with diameters 2 mm （jetsam） and 1 mm （flotsam） and density 2 500 kg.m^-3 are used as solid mixtures with different volume fractions. The particles are initially packed uniformly in a rectangular bed and then fluidized by gas uniformly injected at the bottom of the bed. The gas injection velocities vary to cover fixed, partially and fully fluidized bed conditions. Segregation/mixing behaviour is discussed in terms of flow patterns, solid concentration profile and mixing kinetics. The results show that segregation, as a transient fluidization process, is strongly affected by gas injection velocities for a given particle mixture. With the increase of the volume fraction of flotsam, size segregation appears at lower velocities.

关键词： gas fluidization segregation discrete particle simulation

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