检索结果-南通市图书馆

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

胎盘绒毛膜血管瘤病17例临床病理分析

诊断病理学杂志 2024年第6期31卷 537-539,550页

作者：张爱格王莉萍杨毅斌陈菠郑良楷厦门大学附属妇女儿童医院厦门市妇幼保健院病理科福建厦门361003

目的研究和探讨胎盘绒毛膜血管瘤病(CM)的临床病理特征、诊断、鉴别诊断及对围生儿结局的影响。方法收集厦门市妇幼保健院病理科2021年6月至2023年3月确诊CM 17例,回顾性分析其临床及病理资料,并进行分析总结。结果17例CM中局限型占15例... 详细信息

目的研究和探讨胎盘绒毛膜血管瘤病(CM)的临床病理特征、诊断、鉴别诊断及对围生儿结局的影响。方法收集厦门市妇幼保健院病理科2021年6月至2023年3月确诊CM 17例,回顾性分析其临床及病理资料,并进行分析总结。结果17例CM中局限型占15例(占88.2%),包括局灶性7例,阶段性8例(2例见终末绒毛累及);弥漫型2例(占11.8%,均见终末绒毛累及);围生儿影响方面,CM、非CM在生长发育迟缓、早产、死胎的总体分布上存在着统计学差异(P<0.05)。结论CM是比较少见的一种胎盘绒毛血管病变,除了累及干绒毛和未成熟中间型绒毛,还可累及终末绒毛,对围生儿结局有不良影响,需引起临床重视,胎盘的准确评估具有临床意义。

关键词：绒毛膜血管瘤病胎盘病理分析围生儿

Carbon-coated hybrid crystals with fast electrochemical reaction kinetics for ultra-stable and high-load sodium-ion batteries

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2024年第2期43卷 647-657页

作者： Chuan Ou Ming-Dong Tan Zhen-Bang li Zhao-Jie li Fei Tian Zheng-ping Qiao Dan-Ni Lei Cheng-Xin wang State Key Laboratory of Optoelectronic Materials and Technologies School of Materials Science and EngineeringSun Yat-Sen UniversityGuangzhou510275China

Owing to its high theoretical capacity and low cost,Sn has attracted significant attention in sodium-ion ***,the slow kinetics of electrochemical reactions and the rapid decay of capacity resulting from drastic changes in the volume of Sn,as well as persistent side reactions between Sn and the organic electrolyte during the(de)sodium process,have limited its *** improve the electrochemical performance of Sn-based materials,the bottom-up method is normally used to prepare carbon-coated ***,its complex preparation processes and harsh conditions make it unsuitable for practical ***,a carbon-coated hybrid crystal composite(Sn/SnO_(x)@C)was prepared using an up-bottom method with commercial Sn/SnO *** effects accelerate the electrochemical kinetics and inhibit the coarsening of Sn *** Sn/SnO_(x)@C composite electrode exhibited capacity retention of 80.7%even after approximately 1000 cycles(360.4 mAh·g^(−1)) at a current density of 1 A·g^(−1).The high-load Na_(3)V_(2)(PO4)3||Sn/SnO_(x)@C full cell presents a capacity retention rate of 91.7%after 150 cycles at the current density of 0.5 A·g^(−1).This work may significantly accelerate the commercialization of the Sn/SnO_(x)@C composite in sodium-ion batteries with high energy density.

关键词： Sodium-ion batteries(SIBs) Sn-based anode Ultraviolet curing Up-bottom method

Photosynthetic response dynamics in the invasive species Tithonia diversifolia and two co-occurring native shrub species under fluctuating light conditions

在线全文

学校读者我要写书评

暂无评论

Plant Diversity 2024年第2期46卷 265-273页

作者： Ju li Shu-Bin Zhang Yang-ping li CAS Key Laboratory of Tropical Forest Ecology Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesMenglunMengla 666303YunnanChina University of Chinese Academy of Sciences Beijing 100049China

To determine the invasiveness of invasive plants,many studies have compared photosynthetic traits or strategies between invasive and native ***,few studies have compared the photosynthetic dynamics between invasive and native species during light *** compared photosynthetic induction,relaxation dynamics and leaf traits between the invasive species,Tithonia diversifolia and two native species,Clerodendrum bungei and Blumea balsamifera,in full-sun and shady *** photosynthetic dynamics and leaf traits differed among *** showed a slower induction speed and stomatal opening response but had higher average intrinsic water-use efficiency than the two native species in full-sun ***,the slow induction response may be attributed to the longer stomatal length in *** had a significant effect on photosynthetic dynamics in *** and *** but not in *** shady habitat,*** had a faster photosynthetic induction response than in full-sun habitat,leading to a higher average stomatal conductance during photosynthetic induction in *** than in the two native *** contrast,*** had a larger stomatal length and slower photosynthetic induction and relaxation response in shady habitat than in full-sun habitat,resulting in higher carbon gain during photosynthetic ***,in both habitats,*** had an overall higher carbon gain during light fluctuations than the two native *** results indicated that *** can adopt more effective response strategies under fluctuating light environments to maximize carbon gain,which may contribute to its successful invasion.

关键词： Invasive plant Photosynthetic induction Photosynthetic relaxation Carbon gain Stomatal traits Tithonia diversifolia

Self-healable gels in electrochemical energy storage devices

在线全文

学校读者我要写书评

暂无评论

Nano Research 2024年第4期17卷 3302-3323页

作者： Yang li PeiPei Ding Yuzhe Gu Sheng Qian Yuncong Pang Lele wang Jiayang Feng Baoguang liu Qi Wan ping li Zhiwei liu College of Electronic and Optical Engineering&College of Flexible Electronics(Future Technology) Nanjing University of Posts&Telecommunications(NJUPT)Nanjing 210023China State Key Laboratory of Organic Electronics and Information Displays&Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials(IAM)Nanjing University of Posts and Telecommunications(NJUPT)Nanjing 210023China College of Materials Science&Engineering Beijing University of TechnologyBeijing 100124China Beijing Advanced Innovation Center for Materials Genome Engineering Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing 100083China Pillar of Engineering Product Development Singapore University of Technology and DesignSingapore 487372Singapore School of Energy and Environmental Engineering University of Science and Technology BeijingBeijing 100083China

In the green energy and carbon-neutral technology,electrochemical energy storage devices have received continuously increasing attention ***,due to the unavoidable volume expansion/shrinkage of key materials or irreversible mechanical damages during application,the stability of energy storage and delivery as well as the lifetime of these devices are severely shortened,leading to serious performance degradation or even safety ***,the utilization of self-healable gels into electrochemical energy storage devices,such as electrodes,binders,and electrolytes,is proven as an effective method to realize long-term stable operation of these devices via the self-repairing of mechanical and electrochemical ***,this review first summarizes the feature and fabrication of different gels,paying special attention to hydrogels,organohydrogels,and ***,basic concepts and figure of merit of self-healable gels are analyzed with a detailed discussion at the healing mechanisms,from reversible dynamic bonds to physical molecular diffusion,and to external healing *** we introduce all the important parts of electrochemical energy storage devices,which could be replaced by healable gels to enhance the durability,including electrodes,binders,and ***,the critical challenges and future perspectives regarding the future development of healable gels based high-performance electrochemical energy storage devices or electronics are provided.

关键词： self-healable gels healing mechanisms electrodes binders gel electrolytes

Reversing artemisinin resistance by leveraging thermo-responsive nanoplatform to downregulating GSH

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2024年第6期35卷 392-397页

作者： Yong-Dan Zhao Yidan wang Rongrong wang lina Chen Hengtong Zuo Xi wang Jihong Qiang Geng wang Qingxia li Canqi ping Shuqiu Zhang Hao wang School of Pharmacy Shanxi Medical UniversityTaiyuan 030001China National Center for Nanoscience and Technology Beijing 100190China Artemisinin Research Center Institute of Chinese Materia MedicaBeijing 100700China

Artemisinin(ART)resistance has been an emerging clinical problem,severely compromising antimalarial efficacy and threatening the global malaria elimination *** intensive studies about the molecular mechanism for ART resistance are under way,no effective therapeutic targets for reversing resistance have been ***,we explore glutathione(GSH)as a therapeutic target to develop a thermo-responsive nanoplatform to specifically co-deliver ART and GSH synthesis inhibitor(L-buthionine sulfoximine,BSO)in a sustained manner,effectively reversing ART resistance in *** combining with BSO,ART exerts increased antimalarial activity with reduced half-maximal inhibitory concentration(IC50)by 7.43-fold in ART-resistant *** work reveals that the GSH in ART-resistant parasites can be a promising therapeutic target for reversing ART resistance,paving the way for developing drug candidates and intelligent nanomedicines in malaria therapy.

关键词： Nanomedicines Drug delivery Artemisinins resistance Malaria Glutathione

Understanding the Low Predictability of the 2015/16 El Niño Event Based on a Deep Learning Model

在线全文

学校读者我要写书评

暂无评论

Advances in Atmospheric Sciences 2024年第7期41卷 1313-1325页

作者： Tingyu wang ping HUANG Xianke YANG Center for Monsoon System Research Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China National Space Science Center Chinese Academy of SciencesBeijing 100190China State Key Laboratory of Space Weather National Space Science CenterChinese Academy of SciencesBeijing 100190China College of Plant Science and Technology Huazhong Agricultural UniversityWuhan 430070China

The 2015/16 El Niño event ranks among the top three of the last 100 years in terms of intensity,but most dynamical models had a relatively low prediction skill for this event before the summer ***,the attribution of this particular event can help us to understand the cause of super El Niño–Southern Oscillation events and how to forecast them *** present study applies attribute methods based on a deep learning model to study the key factors related to the formation of this event.A deep learning model is trained using historical simulations from 21 CMIP6 models to predict the Niño-3.4 *** integrated gradient method is then used to identify the key signals in the North Pacific that determine the evolution of the Niño-3.4 *** crucial signals are then masked in the initial conditions to verify their roles in the *** addition to confirming the key signals inducing the super El Niño event revealed in previous attribution studies,we identify the combined contribution of the tropical North Atlantic and the South Pacific oceans to the evolution and intensity of this event,emphasizing the crucial role of the interactions among them and the North *** approach is also applied to other El Niño events,revealing several new precursor *** study suggests that the deep learning method is useful in attributing the key factors inducing extreme tropical climate events.

关键词： ENSO attribution deep learning ENSO prediction extreme El Niño

Study of PAPR mitigation in OFDM-VLC system by SCMA codebook design

在线全文

学校读者我要写书评

暂无评论

Optoelectronics Letters 2024年第9期20卷 543-548页

作者： YANG Ting li Ganggang liU Tao wang ping wang Zhao School of Telecommunications Engineering Xidian University

Traditional orthogonal frequency division multiplexing(OFDM) based visible light communication(VLC) system is susceptible to high peak-to-average power ratio(PAPR), thus leading to low power efficiency. To address this issue, a sparse code multiple access(SCMA) codebook design method has been proposed to lower the PAPR of the clipping based OFDM-VLC system.

关键词： A

同方期刊数据库

Mechanical characteristics and reservoir stimulation mechanisms of the Gulong shale oil reservoirs, the northern Songliao Basin

在线全文

学校读者我要写书评

暂无评论

Petroleum Science 2024年第3期21卷 2023-2036页

作者： Si-Wei Meng Jia-ping Tao Tian-Jiao li Dong-Xu li Su-ling wang liu Yang Xin liu li-Hao liang He liu PetroChina Research Institute of Petroleum Exploration Development Beijing100083China National Key Laboratory of Continental Shale Oil Daqing 163002HeilongjiangChina Dalian University of Technology Dalian116024LiaoningChina PetroChina Daqing Oilfield Co.Ltd. Daqing163002HeilongjiangChina Northeast Petroleum University Daqing163002HeilongjiangChina China University of Mining and Technology(Beijing) Beijing100083China

Shale oil of the Qingshankou Formation of the Gulong Sag,the northern Songliao Basin,represents the first attempt at large-scale development of pure-shale-type shale oil in *** integrating the multiscale refined reservoir characterization with macro-micro-scale mechanical testing,it is clarified that the Gulong shale is characterized by high clay mineral content,high rock plasticity,highly-developed bedding,and prominent mechanical anisotropy.A three-dimensional(3D)fracture propagation model of hydraulic fracturing was built for the Gulong shale,which fully captures the hydraulic fracture distribution pattern affected by the high bedding density,in-situ stress,and fracturing treatment *** research showed that due to influences of bedding,hydraulic fracturing in the Gulong shale forms a complex fracture morphology featuring the main fracture with multiple perpendicular branches that have different lengths(like the outdoor directional TV antenna);however,the vertical propagation of fractures is inhibited,and the fracture height is commonly less than 10 *** limited stimulated reservoir volume(SRV)is the main problem facing the fracturing stimulation of the Gulong shale *** density has vital effects on fracture morphology,so case-specific fracturing designs shall be developed for shale intervals with different bedding development *** reservoirs with welldeveloped bedding,it is suggested to properly increase the perforation cluster spacing and raise the volume and proportions of viscous fluids of the pad,so as to effectively promote vertical fracture propagation and improve reservoir stimulation *** study integrates multi-scale fine reservoir characterization and macro-micro-scale mechanical testing,as well as the construction and numerical simulation of hydraulic fracturing models for high-density layered shale reservoirs,providing a new approach and methodological framework for the fracturing research of high-density layer

关键词： Shale oil Hydraulic fracturing High bedding density Fracture propagation model

Synthesis and Crystal Structure of 2-Hydroxybenzoic Acid [1-(3,5-Dibromo-2-hydroxyphenyl)methylidene]hydrazide Methanol

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2007年第5期26卷 547-550页

作者： wang Nong li Jing-ping PU Yan-ling School of Chemical and Biological Engineering Lanzhou Jiaotong University Lanzhou 730070 China

A new Schiff base compound, 2-hydroxybenzoic acid [1-（3,5-dibromo-2-hydroxyphenyl） methylidene]hydrazide methanol （C14H10Br2N2O3·CH3OH）, has been synthesized by the condensation of equimolar 3,5-dibromosalicylaldehyde and 2-hydroxybenzoic acid hydrazide in a methanol solution. The compound was characterized by elemental analysis, IR spectra, and singlecrystal X-ray diffraction. The compound consists of a Schiff base moiety 2-hydroxybenzoic acid [1-（3,5-dibromo-2-hydroxyphenyl）methylidene]hydrazide and a lattice methanol molecule. The crystal belongs to the monoclinic system, space group P21/n with a = 7.183（1）, b = 15.673（2）, c = 15.001（2） A, β = 98.345（2）°, Z = 4, V = 1670.9（4） A^3, Dc = 1.773 g/cm^3, Mr = 446.10, λ（MoKα） = 0.71073 , μ = 4.872 mm^-1, F（000） = 880, R = 0.0458 and wR = 0.0963. A total of 3445 unique reflections were collected, of which 2236 with I 〉 2σ（Ⅰ） were observed. As expected, the molecule adopts a trans configuration about the C=N double bond. The two benzene rings are nearly coplanar （mean deviation from the combined plane is 0.061（4） ）, with the dihedral angle of 7.9（3）°. The preliminary biological tests show that the compound has moderate antibacterial activities.

关键词： Schiff base acylhydrazone crystal structure antibacterial activity