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“Phonon” scattering beyond perturbation theory

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Science China(Physics,Mechanics & Astronomy) 2016年第2期59卷 28-35页

作者： Wu Jie qiu Xue Zhi Ke Li Li Xi Li Hua Wu jiong Yang Wen Qing Zhang State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences Department of Physics East China Normal University Materials Genome Institute Shanghai University

Searching and designing materials with intrinsically low lattice thermal conductivity （LTC） have attracted extensive considera- tion in thermoelectrics and thermal management community. The concept of part-crystalline part-liquid state, or even part-crystalline part-amorphous state, has recently been proposed to describe the exotic structure of materials with chemical-bond hierarchy, in which a set of atoms is weakly bonded to the rest species while the other sublattices retain relatively strong rigidity. The whole system inherently manifests the coexistence of rigid crystalline sublattices and fluctuating noncrystalline substructures. Representative materials in the unusual state can be classified into two categories, i.e., caged and non-caged ones. LTCs in both systems deviate from the traditional 7-1 relationship （T, the absolute temperature）, which can hardly be described by small-parameter-based perturbation approaches. Beyond the classical perturbation theory, an extra rattling-like scattering should be considered to interpret the liquid-like and sublattice-amorphization-induced heat transport. Such a kind of compounds could be promising high-performance thermoelectric materials, due to the extremely low LTCs. Other physical properties for these part-crystalline substances should also exhibit certain novelty and deserve further exploration.

关键词： part-crystalline state sublattice disorder lattice thermal conductivity

Hydroxycoumarin efficiently inhibits spring viraemia of carp virus infection in vitro and in vivo

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Zoological Research 2020年第4期41卷 395-409页

作者： Lei Liu Da-Wei Song Guang-Lu Liu Li-Peng Shan Tian-Xiu qiu jiong Chen State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products Ningbo UniversityNingboZhejiang 315211China Laboratory of Biochemistry and Molecular Biology School of Marine SciencesMeishan CampusNingbo UniversityNingboZhejiang 315832China Key Laboratory of Applied Marine Biotechnology of Ministry of Education Meishan CampusNingbo UniversityNingboZhejiang 315832China School of Chemistry&Chemical Engineering Zhoukou Normal UniversityZhoukouHenan 466001China

Spring viremia of carp virus(SVCV)causes devastating losses in *** has an advantageous structure for the design of novel antiviral agents with high affinity and *** this study,we evaluated a hydroxycoumarin medicine,i.e.,7-(6-benzimidazole)coumarin(C10),regarding its anti-SVCV effects in vitro and in *** showed that up to 12.5 mg/L C10 significantly inhibited SVCV replication in the epithelioma papulosum cyprini(EPC)cell line,with a maximum inhibitory rate of>97%.Furthermore,C10 significantly reduced cell death and relieved cellular morphological damage in SVCV-infected *** mitochondrial membrane potential(ΔΨm)also suggested that C10 not only protected mitochondria,but also reduced apoptosis in SVCVinfected *** in vivo studies,intraperitoneal injection of C10 resulted in an anti-SVCV effect and substantially enhanced the survival rate of virusinfected ***,C10 significantly enhanced antioxidant enzyme activities and decreased reactive oxygen species(ROS)to maintain antioxidant-oxidant balance within the host,thereby contributing to inhibition of SVCV *** up-regulation of six interferon(IFN)-related genes also demonstrated that C10 indirectly activated IFNs for the clearance of SVCV in *** was beneficial for the continuous maintenance of antiviral effects because of the low viral loads in ***,C10 is suggested as a therapeutic agent with great potential against SVCV infection in aquaculture.

关键词： vivo thereby maintain

PPVSC-1株VP2基因的定点突变及真核表达载体的构建

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四川农业大学学报 2008年第3期26卷 258-262页

作者：胡秋炅徐志文郭万柱朱玲王印王小玉四川农业大学动物医学院四川雅安625014

以PPV VP2为基础,利用重叠延伸PCR技术分别将VP2蛋白中第402位(A)和214位(B)的半胱氨酸突变为精氨酸,并将突变体克隆入pMD19-T Simple载体中;经酶切、PCR和测序鉴定后,利用KpnⅠ和BamHⅠ酶切位点,定向克隆入真核表达载体***中,构建突变... 详细信息

以PPV VP2为基础,利用重叠延伸PCR技术分别将VP2蛋白中第402位(A)和214位(B)的半胱氨酸突变为精氨酸,并将突变体克隆入pMD19-T Simple载体中;经酶切、PCR和测序鉴定后,利用KpnⅠ和BamHⅠ酶切位点,定向克隆入真核表达载体***中,构建突变体与报告基因EGFP融合表达的***2(A)和***2(B)真核表达载体;利用脂质体法将重组质粒分别转染COS-7细胞。结果:成功构建了突变体的真核表达载体;在转染后的荧光观察中发现,***2(A)和***2(B)质粒转染细胞后,两者表达后的荧光信号不同,A样品的荧光呈颗粒状分布于细胞中,而B样品的荧光信号均匀分布于细胞中。提示,突变是引起表达差异的主要原因。

关键词：猪细小病毒 VP2 基因定点突变

Potential aquatic environmental risks of trifloxystrobin:Enhancement of virus susceptibility in zebrafish through initiation of autophagy

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Zoological Research 2021年第3期42卷 339-349页

作者： Huan Wang Tian-Xiu qiu Jian-Fei Lu Han-Wei Liu Ling Hu Lei Liu jiong Chen State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products Ningbo UniversityNingboZhejiang 315211China Laboratory of Biochemistry and Molecular Biology School of Marine SciencesMeishan CampusNingbo UniversityNingboZhejiang 315832China Key Laboratory of Applied Marine Biotechnology of Ministry of Education Meishan CampusNingbo UniversityNingboZhejiang 315832China Ningbo Customs District Technology Center NingboZhejiang 315832China

Chronic pollution in aquatic ecosystems can lead to many adverse effects,including a greater susceptibility to pathogens among resident ***(TFS)is a strobilurin fungicide widely used in Asia to control soybean ***,it has the potential to enter aquatic ecosystems,where it may impair fish resistance to viral *** explore the potential environmental risks of TFS,we characterized the antiviral capacities of fish chronically exposed to TFS and subsequently infected with spring viraemia of carp virus(SVCV).Although TFS exhibited no significant cytotoxicity at the tested environmental concentrations during viral challenge,SVCV replication increased significantly in a time-dependent manner within epithelioma papulosum cyprini(EPC)cells and zebrafish exposed to 25μg/L *** showed that the highest viral load was more than 100-fold that of the *** biochemical assays indicated that autophagy was induced by TFS,and associated changes included an increase in autophagosomes,conversion of LC3-II,accumulation of Beclin-1,and degradation of P62 in EPC cells and *** addition,TFS markedly decreased the expression and phosphorylation of mTOR,indicating that activation of TFS may be associated with the mTORmediated autophagy *** study provides new insights into the mechanism of the immunosuppressive effects of TFS on non-target aquatic hosts and suggests that the existence of TFS in aquatic environments may contribute to outbreaks of viral diseases.

关键词： Trifloxystrobin Autophagy SVCV Chronic toxicity Susceptibility

High-throughput deformation potential and electrical transport calculations

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npj Computational Materials 2023年第1期9卷 378-385页

作者： Yeqing Jin Xiangdong Wang Mingjia Yao Di qiu David J.Singh Jinyang Xi jiong Yang Lili Xi Materials Genome Institute Shanghai UniversityShanghai 200444China School of Physics and Electronic Science East China Normal UniversityShanghai 200241China Zhejiang Laboratory HangzhouZhejiang 311100China Department of Physics and Astronomy University of MissouriColumbiaMO 65211USA

The deformation potential plays an important role in electrical transport properties, but in the context of high-throughputsearches requires a consistent and readily computable reference level. Here, we design a high-throughput method forcalculating the deformation potential for semiconductors in the MatHub-3d database. The deformation potential is obtainedfrom the volume-dependent band edge (valence band maximum and conduction band minimum) variations with respect tothe reference level. In order to adapt the calculation of reference level to a high-throughput manner, the average value of thefirst valence electron energy band associated with each compound is used as the reference level. Deformation potentials for11,993 materials are calculated using the above-mentioned method. By considering the calculated deformation potentials,electronic structures, and bulk moduli, 9957 compounds with converged electrical transport properties are obtained. 332promising p-type thermoelectric materials, and 321 n-type entries are then proposed. Among them, 156 compounds arescreened to having both potentially good n- and p-type thermoelectric transport properties. The band structures and chemicalbonding information for several typical compounds are further presented to reveal favorable band and bonding features forthermoelectrics.

关键词： deformation potential transport

Solitary plexiform neurofibroma of the stomach:A case report

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World Journal of Gastroenterology 2014年第17期20卷 5153-5156页

作者： Lei Shi Fu-Jian Liu qiu-Hong Jia Hang Guan Zhao-jiong Lu Department of Gastroenterology the Eighth Affiliated Hospital of Guangxi Medical University

Plexiform neurofibroma(PN)of the digestive tract is very rare and usually part of the generalized syndrome of neurofibromatosis type 1(von Recklinghausen disease).Solitary PN of the stomach is extremely rare and has not been reported in the *** we present a case of solitary PN of the stomach,which was not associated with von Recklinghausen disease.A38-year-old male presented abdominal pain and distention for 7 *** patient underwent endoscopy of the upper gastrointestinal tract,which revealed a 3.5 cm protruding and cauliflower-shaped mass with a shallow1 cm central ulcer in the greater curvature of the *** lesion was removed by laparoscopic *** examination demonstrated characteristic histological findings of spindle-shaped *** analysis showed that the tumor cells were positive for S-100 protein,but negative for CD34,KI-67,CD117,and *** on histological findings,gastrointestinal stromal tumor could be excluded,and thus the case was confirmed as *** described the clinical features,physical examination,endoscopic findings,and histopathological examination of this case.

关键词： Plexiform neurofibroma Neurofibromatosis Von Recklinghausen disease Abdominal pain

Improved electrical transport properties and optimized thermoelectric figure of merit in lithium-doped copper sulfides

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Rare Metals 2018年第4期37卷 282-289页

作者： Meng-Jia Guan Peng-Fei qiu Qing-Feng Song jiong Yang Du-Di Ren Xun Shi Li-Dong Chen State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of Science Shanghai 200050 China University of Chinese Academy Science Beijing 100049 China Materials Genome Institute Shanghai UniversityShanghai 200444 China

Copper sulfide Cu2S is a p-type semiconducting compound that has attracted great attentions in the thermoelectric （TE） community most recently. Considering the intrinsic ultralow lattice thermal conductivity, the enhancement of TE performance in CuzS should be achieved through improving its electrical transport properties. To achieve this goal, lithium element was doped into CuzS in this study. A series of Cu2_xLixS samples with different Li contents （x = 0, 0.005, 0.010, 0.050, and 0.100） was synthesized by the melting-annealing method. When x 〈 0.05, the Cuz_xLixS samples are stable and pure phases, having the same monoclinic structure with the pristine Cu2S at room temperature. The electrical conductivities in the Cu2_xLixS samples are greatly improved with the Li-doping content increasing due to the enhanced carrier concentrations. Meanwhile, doping Li into CuzS increases the ionic activation energy and lessens the influence of mobile Cu ions on the heat-carrying phonons. Thus, the thermal conductivities of the Li-doped Cu2S samples increase. A maximal figure of merit （zT） of 0.84 at 900 K is obtained in Cul.99Lio.018, about 133% improvement as compared with that in Cu2S matrix.

关键词： Thermoelectric Copper sulfide Doping Superionic conductor

入境国际航行船舶外来病媒生物风险评估研究及应用

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中华卫生杀虫药械 2017年第3期23卷 230-234页

作者：裘炯良卢厚林周力沛孙志郑剑宁施惠祥杨定波宁波出入境检验检疫局浙江宁波315012

目的应用随机森林模型法评估研究入境国际航行船舶携带输入外来病媒生物的风险。方法以中国第2大港、世界第5大港的宁波港作为研究范围,以2014年到港的国际航行船舶为研究对象,对6 051艘次船舶的33项指标展开调查,采集数据信息。对数据... 详细信息

目的应用随机森林模型法评估研究入境国际航行船舶携带输入外来病媒生物的风险。方法以中国第2大港、世界第5大港的宁波港作为研究范围,以2014年到港的国际航行船舶为研究对象,对6 051艘次船舶的33项指标展开调查,采集数据信息。对数据进行清洗及变量筛选后应用R语言编程实现随机森林模型法建模训练,并以所建模型预测新到港的1 333艘次船舶外来病媒生物携带风险。结果经过变量筛选,船舶总吨、净吨、船龄、货物种类等8个变量对入境国际航行船舶上是否可能携带外来病媒生物的风险预测有重要意义;最优模型是决策树节点变量数=3,决策树数量=500的随机森林模型;通过该模型预测船舶携带外来病媒生物风险与实际检疫结果的符合率达到81.17%,预测效果良好。结论针对高度不确定的非线性系统,应用随机森林模型法可实现更加精确的预测功能,为国境卫生检疫风险评估及预警方面的研究及应用提供理论基础。

关键词：随机森林外来病媒生物风险预测 R语言大数据

Anion-site-modulated thermoelectric properties in Ge2Sb2Te5-based compounds

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Rare Metals 2020年第10期39卷 1127-1133页

作者： Ping Hu Tian-Ran Wei Shao-Ji Huang Xu-Gui Xia Peng-Fei qiu jiong Yang Li-Dong Chen Xun Shi State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China State Key Laboratory of Metal Matrix Composites School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China Materials Genome Institute Shanghai UniversityShanghai 200444China

The amalgamation of multi-subjects often elicits novel materials,new concepts and unexpected ***,Ge2 Sb2 Te5,as the most established phasechange material,has been found to exhibit decent thermoelectric performance in its stable,hexagonal *** challenge for higher figure of merit(zT) values lies in reducing the hole carrier concentration and enhancing the Seebeck coefficient,which,however,can be hardly realized by conventional *** in this work,we report that the electrical properties of Ge2 Sb2 Te5 can be readily optimized by anion-site ***,Se/S substitution for Te induces stronger and more ionic bonding,lowering the hole ***,an increase in electronic density of state is introduced by Se substitution,contributing to a large increase in Seebeck *** with the reduced thermal conductivity,maximum zT values above 0.7 at 800 K have been achieved in Se/S-alloyed materials,which is ~30% higher than that in the pristine Ge2Sb2 Te5.

关键词： Thermoelectric Ge2Sb2Te5 Anion-site modulation Chemical bond Electronic density of states