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An exotic Cretaceous kimberlite linked to metasomatized lithospheric mantle beneath the southwestern margin of the S?o Francisco Craton,Brazil

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Geoscience Frontiers 2022年第1期13卷 182-203页

作者： Luísa.d.V.Carvalho Tiago Jalowitzki Ricardo Scholz Guilherme O.Gonçalves Marcelo Peres Rocha Rogério Silvestre Pereira Cristiano Lana Marco Paulo de Castro Gláucia Queiroga Reinhardt A.Fuck Universidade Federal de Ouro Preto(UFOP) Escola de MinasDepartamento de GeologiaCampus Morro do Cruzeiro35400-000 Ouro PretoMGBrazil Universidade de Brasília(UnB) Instituto de GeociênciasCampus Universitário Darcy Ribeiro70910-900 BrasíliaDFBrazil Independent Geologist Consultant

We present major and trace element compositions of mineral concentrates comprising garnet xenocrysts,ilmenite,phlogopite,spinel,zircon,and uncommon minerals(titanite,calzirtite,anatase,baddeleyite and pyrochlore)of a newly discovered Late Cretaceous kimberlite(U-Pb zircon age 90.0±1.3 Ma;2σ)named Osvaldo Franca 1,located in the Alto Paranaíba Igneous Province(APIP),southeastern *** grains are lherzolitic(Lherz-1,Lherz-2 and Lherz-3),harzburgitic(Harz-3)and wehrlitic(Wehr-2).The pyrope xenocrysts cover a wide mantle column in the subcratonic lithosphere(66–143 km;20–43 kbar)at relatively low temperatures(811–875°C).The shallowest part of this mantle is represented by Lherz-1 pyropes(20–32 kbar),which have low-Cr(Cr_(2)O_(3)=1.74–6.89 wt.%)and fractionated middle to heavy rare earth elements(MREE-HREE)*** deepest samples are represented by Lherz-2,Lherz-3,Harz-3,and Wehr-2 pyropes(36–43 kbar).They contain high-Cr contents(Cr_(2)O_(3)=7.36–11.19 wt.%)and are characterized by sinusoidal(Lherz-2 and Wehr-2)and spoon-like(Lherz-3 and Harz-3)REE *** to their REE and trace elements,pyrope xenocrysts have enriched nature(e.g.,Ce and Yb ***_(2)O_(3)),indicating that the cratonic lithosphere has been affected by a silicate melt with subalkaline/tholeiite composition due to their low Zr,Ti and Y *** minerals with typical kimberlitic signatures,such as ilmenite and zircon,the exotic compositions of phlogopite and ulvöspinel suggest an enriched component in the magma *** formation of rare mineral phases with strong enrichment of light-REE(LREE)and high field strength elements(HFSE)is attributed to the late-stage kimberlitic *** propose a tectonic model where a thermal anomaly,represented by the low-velocity seismic anomaly observed in P-wave seismic tomography images,supplied heat to activate the alkaline magmatism from a metasomatized cratonic mantle source during the late-stages of Gondwana fragmentation and conse

关键词： Osvaldo França 1 kimberlite Alto Paranaíba Igneous Province Metasomatized cratonic lithosphere Zircon U-Pb geochronology

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dual-Functional Lithiophilic/Sulfiphilic Binary-Metal Selenide Quantum dots Toward High-Performance Li-S Full Batteries

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Nano-Micro Letters 2023年第5期15卷 169-186页

作者： Youzhang Huang Liang Lin Yinggan Zhang Lie Liu Baisheng sa Jie Lin Laisen wang dong-Liang Peng Qingshui Xie State Key Lab for Physical Chemistry of Solid Surfaces Fujian Key Laboratory of Surface and Interface Engineering for High Performance MaterialsCollege of MaterialsXiamen UniversityXiamen 361005People’s Republic of China Shenzhen Research Institute of Xiamen University Shenzhen 518000People’s Republic of China College of Materials Science and Engineering Multiscale Computational Materials FacilityFuzhou UniversityFuzhou 350100People’s Republic of China

The commercial viability of lithium-sulfur batteries is still challenged by the notorious lithium polysulfides(Li PSs)shuttle effect on the sulfur cathode and uncontrollable Li dendrites growth on the Li ***,a bi-service host with Co-Fe binary-metal selenide quantum dots embedded in three-dimensional inverse opal structured nitrogen-doped carbon skeleton(3dIO FCSe-Qds@NC)is elaborately designed for both sulfur cathode and Li metal *** highly dispersed FCSe-Qds with superb adsorptive-catalytic properties can effectively immobilize the soluble Li PSs and improve diffusion-conversion kinetics to mitigate the polysulfide-shutting ***,the 3d-ordered porous networks integrated with abundant lithophilic sites can accomplish uniform Li deposition and homogeneous Li-ion flux for suppressing the growth of *** advantage of these merits,the assembled Li-S full batteries with 3dIO FCSe-Qds@NC host exhibit excellent rate performance and stable cycling ability(a low decay rate of 0.014%over 2,000 cycles at 2C).Remarkably,a promising areal capacity of 8.41 mAh cm^(-2)can be achieved at the sulfur loading up to 8.50 mg cm^(-2)with an ultra-low electrolyte/sulfur ratio of 4.1μL mg^(-1).This work paves the bi-serve host design from systematic experimental and theoretical analysis,which provides a viable avenue to solve the challenges of both sulfur and Li electrodes for practical Li-S full batteries.

关键词： dual-functional host Fe_(2)CoSe_(4)quantum dots Shuttle effect dendrite-free Li anode Li-S full batteries

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Topological phase in one-dimensional Rashba wire

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Chinese Physics B 2016年第7期25卷 393-400页

作者：汪萨克汪军刘军丰 department of Physics Southeast University department of Physics South University of Science and Technology of China

We study the possible topological phase in a one-dimensional（1d） quantum wire with an oscillating Rashba spin–orbital coupling in real space. It is shown that there are a pair of particle–hole symmetric gaps forming in the bulk energy band and fractional boundary states residing in the gap when the system has an inversion symmetry. These states are topologically nontrivial and can be characterized by a quantized Berry phase ±π or nonzero Chern number through dimensional extension. When the Rashba spin–orbital coupling varies slowly with time, the system can pump out 2 charges in a pumping cycle because of the spin flip effect. This quantized pumping is protected by topology and is robust against moderate disorders as long as the disorder strength does not exceed the opened energy gap.

关键词： one-dimensional topological phase Rashba spin–orbit interaction spatial modulation quantized pump

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dynamics of water Flow in the Atmosphere-Aerial Roots Continuum

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Open Journal of Fluid dynamics 2018年第4期8卷 404-415页

作者： Médéhouénou Enagnon Alexis Kounouhéwa Bruno Basile Koutchadé Clément Centre Béninoise de la Recherche Scientifique et de l’Innovation (CBRSI)-IRITESE Université d’Abomey-Calavi (UAC) Faculté des Sciences et Technique (FAST) Laboratoire de Physique du Rayonnement (LPR)

The study of the parameters influencing the absorption of atmospheric humidity not condensed by plants with aerial roots is a challenge in the current context of climatic disturbance where methods of adapting plants to water stress have become the concern of many scientific researchers. Based on Poiseuille and Fick laws, leaf water potential depending on solar radiation and atmospheric water potential around aerial roots;the influence of temperature, relative humidity, inclination angle of roots and solar radiation wavelength on the radial and axial water flow through a root segment is simulated. The various simulations show that a low temperature of the air surrounding the root favors a significant entry of water into the root as well as a relative humidity of the high air approaching 100%. The angle of inclination has an influence on the quantity of water entering the root and that rising in the xylem. These different streams of water are optimized for root tilting of 60°. The wavelength of the red radiation received by the leaves favors more entry and rise of water in the root. Future studies for transgenes should be taken into account the influence of all these parameters.

关键词： Plant Aerial Root Absorption Atmospheric Humidity

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Acoustic concept based on an autonomous capsule and a wideband concentric ring resonator for pathophysiological prevention

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Artificial Intelligence in Medical Imaging 2020年第1期1卷 50-64页

作者： Amina Medjdoub Fabrice Lefebvre Nadine sa.d sa.d Soudani Georges Nassar Institute of Electronic Microelectronic and NanotechnologyDepartment of Opto-Acousto-ElectronicUniversitéPolytechnique Hauts-de-FranceVilleneuve d'Ascq 59652France department of Physics UniversitéLibanaise-Facultédes ScienscesBeyrouth 1000Lebanon Signal Processing department Universitédes Sciences et de la Technologie d'OranOran 31000Algeria

BACKGROUNd Research on the performance of elements constituting our modern environment is constantly evolving,both on a daily basis and on technological *** to date,the response of the system to the expectations of the population remains too *** To elaborate an ultrasonic technique to scan and evaluate in-vivo physiological properties by coupling sensors and multilayer biological tissues *** A low-frequency ultrasonic method(around a frequency of 32 KHz)based on the use of an innovative autonomous ultrasonic capsule as a miniaturized elementary spherical sensor(1 cm of diameter)and micro-rings resonators were *** Other their functions as passive listeners for the prevention and diagnosis in physiopathology of the respiratory and laryngeal apparatus,these microresonators coupled to the ultrasonic capsule through biological tissues(the body)are capable of evaluating the effects of aggression of the environment on human *** This would allow consequently the detection of some potential diseases at an early stage,even in people who still represent no symptoms,which would permit an early treatment and a higher chance of cure.

关键词： Sensor Capsule Acoustics Ring resonators Biological tissues

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Prevention and treatment of gerbil hepatitis E using the programmable CRISPR-Cas13d system

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Genes & diseases 2024年第4期11卷 94-97页

作者： Chengcheng Zhao Chong Lia sa Li Hanyu Wu Pengyao Ren Tianlong Liu Xiaoxiang Hu Ran Zhang State Key Laboratory of Animal Biotech Breeding College of Biological SciencesChina Agricultural UniversityBeijing 100193China Laboratory of Veterinary Pathology and Nanopathology College of Veterinary MedicineChina Agricultural UniversityBeijing 100193China

In recent years,the global incidence of hepatitis E virus(HEV)has been rising,leading to increased morbidity and mortality associated with ***13,a CRISPR effector,shows promise as an antiviral agent against singlestranded RNA ***13d,a type VI-d effector,exhibits higher efficiency in suppressing RNA viruses compared to other type VI ***,its in vivo activity against RNA viruses in mammals remains unknown.

关键词： mortality hepatitis treatment

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Effects of ammonia exposure on carcass traits and fatty acid composition of broiler meat

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Animal Nutrition 2016年第4期2卷 282-287页

作者： Huan Xing Sujun Luan Yongbo Sun Renna sa Hongfu Zhang State Key Laboratory of Animal Nutrition Institute of Animal Science Chinese Academy of Agricultural Science

We aimed to study the effects of ammonia on carcass traits, organ indices and fatty acid composition of broilers. Four hundred 21-d-old male Arbor Acres broilers with initial weight 563.52 ± 2.82 g were randomly allotted to 1 of 4 groups treated with ammonia at d75 ± 3 mg/kg concentrations. Each group consisted of 4 replicates of 25 birds. Broilers from 21 to 42 d were reared on the net floor in the respiration-metabolism chambers where similar environmental conditions were maintained. At 32 and 42 d of age, carcass traits and organ indices were determined for4 birds per pen. At 42 d of age, fatty acid composition in the breast and thigh muscle of broilers was measured. Results showed as follows: 1) At 32 d, the dressing percentage of broilers exposed to 25 and75 mg/kg ammonia were lower than those in the control group(P d yield percentage of broilers in the 25 mg/kg ammonia group was also lower(P d, the dressing percentage of broilers in the ammonia treatments and the thigh muscle percentage of broilers in the 50 and 75 mg/kg ammonia groups were lower(P d to 25 and 50 mg/kg ammonia and eviscerated yield percentage exposed to 50 mg/kg ammonia were lower than those in the control(P dney index of broilers(d 32) exposed to ammonia.wa. greater(P d, hepatic index of broilers exposed to ammonia.wa. increased(P d spleen index was decreased(P d, stearic(C18:0)and saturated fatty acids(SFA) in the thigh muscle of broilers were higher, while the unsaturated fatty acid:saturated fatty acid(U:F) ratio and unsaturated fatty acid(UFA) were lower in the 50 mg/kg ammonia treatment than in the control group(P d decline carcass traits and immune organ indices and increase the kidney and hepatic indices.

关键词： Ammonia Broiler Carcass traits Fatty acid Organ indices

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水体中有色可溶性有机物遥感在海岸带调查中的应用——以密西西比—阿查法拉亚海湾水域为例

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海洋地质前沿 2011年第2期27卷 34-38,78页

作者：赵广明 Eurico J d’sa 李广雪国土资源部海洋油气资源和环境地质重点实验室青岛266071 青岛海洋地质研究所青岛266071 路易斯安那州立大学海岸带研究所中国海洋大学海洋地球科学学院青岛266100

有色可溶性有机物(CdOM)是溶解性有机物的重要组成部分,其光学行为和生物地球化学循环对水体生态系统有明显影响,是海岸带调查的重要指标。通过遥感方法监测水体CdOM的变化是海岸带环境动态监测的重要方法,介绍了CdOM遥感监测的原理及... 详细信息

有色可溶性有机物(CdOM)是溶解性有机物的重要组成部分,其光学行为和生物地球化学循环对水体生态系统有明显影响,是海岸带调查的重要指标。通过遥感方法监测水体CdOM的变化是海岸带环境动态监测的重要方法,介绍了CdOM遥感监测的原理及常用的遥感数据,并通过墨西哥湾西北部的密西西比—阿查法拉亚海湾水域系统进行CdOM光学性质季节性遥感调查实例,揭示了在海岸带地区,不同的季节、不同的水样深度条件下,CdOM的光学性质表现出的不同特性,其变化与盐度、溶解氧等的含量密切相关,是海岸带调查研究的重点。

关键词： CdOM 遥感海岸带调查

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RLN衰落下d-MIMO系统遍历容量上边界

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西安电子科技大学学报 2016年第4期43卷 111-116,153页

作者：王咏平曹汉强王安稳华中科技大学电子信息与通信学院湖北武汉430074 海军工程大学理学院湖北武汉430033

针对空域双边相关同时存在、收发天线数量不受限制的RLN衰落下的分布式多输入多输出系统,分析和提出了解析的系统遍历容量的上边界.通过子矩阵展开等方法构造出新的不等式,在对上述系统模型的遍历容量边界分析中,解决了对大尺度衰落矩... 详细信息

针对空域双边相关同时存在、收发天线数量不受限制的RLN衰落下的分布式多输入多输出系统,分析和提出了解析的系统遍历容量的上边界.通过子矩阵展开等方法构造出新的不等式,在对上述系统模型的遍历容量边界分析中,解决了对大尺度衰落矩阵和小尺度衰落矩阵的统计分析无法分离的问题.当系统接收端天线数量大于或小于等于发送端时,在低信噪比到高信噪比的范围内,上边界均非常接近遍历容量.这一结论由不同空域相关系数下的仿真试验所证实.当分布式系统的收发端站点数量均为1时,模型退化为点对点多输入多输出系统,该上边界变为空域双边相关Rayleigh衰落下多输入多输出系统遍历容量的上边界.

关键词：通信系统衰落信道多输入多输出分布式系统遍历容量

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Unexpected Carrier Mobility Anisotropy in the Two-dimensional Ca2Si Monolayer from First-principles Calculations

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Chinese Journal of Structural Chemistry 2020年第7期39卷 1243-1251页

作者： LI Rui-Feng YU Xin-Jiang WEN Cui-Lian ZHANG Ying-Gan LIN Hui-Ling sa Bai-Sheng Multiscale Computational Materials Facility and Key Laboratory of Eco-materials Advanced TechnologyCollege of Materials Science and EngineeringFuzhou UniversityFuzhou 350100China College of Materials Xiamen UniversityXiamen 361005China College of Mathematics and Informatics Fujian Normal UniversityFuzhou 350100China

development of the nano-electronics requires materials with both high carrier mobility and a sufficiently large electronic band *** this work,by means of ab initio calculations,we have predicted a new 2d Ca2Si monolayer with a quasi-planar hexa-coordinate *** geometrical structure,stability and electronic properties of Ca2Si monolayer have been systemically *** Ca2Si monolayer is an indirect semiconductor with band gap of about 0.77 eV,which exhibits stable chemical bonding interactions as well as thermal and dynamic ***,the carrier mobility in Ca2Si monolayer is electron dominated with a high electron mobility about 4590.47 cm2×V-1×*** is excited that the 2d Ca2Si monolayer exhibits strong directionally anisotropic carrier mobility,which could effectively facilitate the migration and separation of the generated electron-hole *** calculations demonstrate that the 2d Ca2Si monolayer is potential for high efficiency solar cells and other nano-electronic applications.

关键词： two-dimensional materials Ca2Si monolayer first-principles calculations carrier mobility

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