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Hierarchical crystalline-amorphous nanocomposites with high strength and large deformability enabled by elemental diffusion

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Journal of Materials Science & Technology 2024年第4期171卷 150-161页

作者： Liqiang Wang Heyi Wang Xin Zhou Huangliu Fu James Utama Surjadi Shuo Qu xu song Rong Fan Yang Lu Department of Mechanical Engineering City University of Hong KongHong KongChina Nano-Manufacturing Laboratory(NML) Shenzhen Research Institute of City University of Hong KongShenzhen 518057China Chengdu Research Institute City University of Hong KongChengdu 610200China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Department of Mechanical and Automation Engineering The Chinese University of Hong KongHong KongChina Department of Mechanical Engineering The University of Hong KongHong KongChina

Amorphous/nanocrystalline dual-phase structures have recently emerged as an effective way for over-coming the strength-ductility trade-offand breaking the limitation of the reverse Hall-Petch ***,we proposed a new strategy to develop a hierarchical and interconnected amorphous-crystalline nanocomposite arising from the nanoscale elemental interdiffusion and oxygen adsorption behavior dur-ing thermal treatment *** nanocomposite consisted of a three-dimensional(3D)hierarchical network structure where the crystalline phase(Cr-Co-Ni-Al)was embedded into the Al-O-based amor-phous phase network with critical feature sizes encompassing three orders of magnitude(from microm-eter to nanometer scale).It can achieve ultrahigh compression yield strength of-3.6 GPa with large homogeneous deformation of over 50%*** massive interstitial atoms induced lattice distortion and hierarchical amorphous phase boundary contributed to the strength *** situ Uniaxial compression inside a transmission electron microscope(TEM)revealed that the exceptional deformability of the nanocomposites resulted from the homogenous plastic flow of nano-sized amorphous phase and the plastic co-deformation behavior restricted by the nano-architected dual-phase *** proposed dual-phase synthesis approach can outperform conventional nanolaminates design strategies in terms of the mechanical properties achievable while providing a pathway to easily tune the microstructure of these nanolaminates.

关键词： Nanolaminates Dual-phase nanocomposites In situ transmission electron microscopy Multi-component alloy

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Multi-lump Kinetic Parameter Estimation and Simulation of Trickle-bed Reactor for Ultra-deep Hydrodesulfurization of Diesel

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China Petroleum Processing & Petrochemical Technology 2024年第3期26卷 147-157页

作者： Huang Zhen Zhang xun Qiao Aijun xue Nan Liu Kaixiang xu song Wang He SINOPEC Engineering Incorporation Co. Ltd.Beijing 100101China

A three-lumping Langmuir-Hinshelwood kinetic model was established based on the structures and reactivities of sulfur *** model described the ultra-deep hydrodesulfurization(UDHDS)performance of diesel,reducing sulfur content from 10000μg/g to less than 10μg/g,with experimental and predicted data showing a discrepancy of less than 10%.The diesel UDHDS reaction was simulated by combining the mass transfer,reaction kinetics model,and physical properties of *** results showed how the concentrations of H2S,hydrogen,and sulfur in the gas,liquid,and solid phases varied along the reactor ***,the study discussed the effects of each process parameter and impurity concentrations(H2S,basic nitrogen and,non-basic nitrogen)on diesel UDHDS.

关键词： diesel TBR ultra-deep HDS kinetic model simulation

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Sustainable Management of Rice Insect Pests by Non-Chemical-Insecticide Technologies in China

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Rice science 2017年第2期24卷 61-72页

作者： xu Hong-xing YANG Ya-jun LU Yan-hui ZHENG xu-song TIAN Jun-ce LAI Feng-xiang FU Qiang LU Zhong-xian Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control Institute of Plant Protection and MicrobiologyZhejiang Academy of Agricultural SciencesHangzhou 310021China China National Rice Research Institute Hangzhou 310006China

Chemical pesticides play crucial roles in the management of crop diseases and pests. However, excessive and irrational use of pesticides has become a major concern and obstacle to sustainable agriculture. As a result, the quality and security of agricultural products are reduced, and the ecological and environmental integrities are threatened. Recently, environment-friendly pest management measures have been introduced and adopted to manage rice insect pests and reduce the use of insecticides. This paper reviewed the advancements in development and application of non-chemical technologies for insect pest management during rice production in China.

关键词： rice chemical insecticide reduce insecticide non-chemical pest management ecological and environmental integrity

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Genome-wide identification and comparative analysis of lipocalin families in Lepidoptera with an emphasis on Bombyx mori

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Insect Science 2023年第1期30卷 15-30页

作者： Yan-Yan Zhou Yue Jin Shuai-Qi Liu Shi-Liang xu Yu-Xin Huang Yu-song xu Lian-Gen Shi Hua-Bing Wang Department of Economic Zoology College of Animal SciencesZhejiang UniversityHangzhouChina

Lipocalins exhibit functional diversity,including roles in retinol transport,invertebrate cryptic coloration,and stress ***,genome-wide identification and characterization of lipocalin in the insect lineage have not been thoroughly ***,we found that a lineage-specific expansion of the lipocalin genes in Lepidoptera occurred in large part due to tandem duplication events and several lipocalin genes involving insect coloration were expanded more via tandem duplication in butterflies.A comparative analysis of conserved motifs showed both conservation and divergence of lepidopteran lipocalin family protein structures during *** observe dynamic changes in tissue expression preference of paralogs in Bombyx mori,suggesting differential contribution of paralogs to specific organ functions during *** localization experiments revealed that lipocalins localize to the cytoplasm,nuclear membrane,or nucleus in BmN ***,several lipocalin genes exhibited divergent responses to abiotic and biotic stresses,and 1 lipocalin gene was upregulated by 30o fold in *** results suggest that lipocalins act as signaling components in defense responses by mediating crosstalk between abiotic and biotic stress *** study deepens our understanding of the comprehensive characteristics of lipocalins in insects.

关键词： functional divergence gene duplication Lepidoptera lipocalin

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Prediction of chlorophyll a concentration using HJ-1 satellite imagery for Xiangxi Bay in Three Gorges Reservoir

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Water Science and Engineering 2014年第1期7卷 70-80页

作者： Dong-xing FAN Yu-ling HUANG Lin-xu song De-fu LIU Ge ZHANG Biao ZHANG College of Hydraulic and Environmental Engineering China Three Gorges University College of Resources and Environment Sciences Hubei University of Technology

Since the impoundment of the Three Gorges Reservoir in 2003, algal blooms have frequently been observed in it. The chlorophyll a concentration is an important parameter for evaluating algal blooms. In this study, the chlorophyll a concentration in Xiangxi Bay, in the Three Gorges Reservoir, was predicted using HJ-1 satellite imagery. Several models were established based on a correlation analysis between in situ measurements of the chlorophyll a concentration and the values obtained from satellite images of the study area from January 2010 to December 2011. Chlorophyll a concentrations in Xiangxi Bay were predicted based on the established models. The results show that the maximum correlation is between the reflectance of the band combination of B4/（B2＋B3） and in situ measurements of chlorophyll a concentration. The root mean square errors of the predicted values using the linear and quadratic models are 18.49 mg/m3 and 18.52 mg/m3, respectively, and the average relative errors are 37.79% and 36.79%, respectively. The results provide a reference for water bloom prediction in typical tributaries of the Three Gorges Reservoir and contribute to large-scale remote sensing monitoring and water quality management.

关键词： chlorophyll a concentration H J-1 satellite remote sensing prediction correlation analysis Xiangxi Bay Three Gorges Reservoir

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Aptamer-conjugated upconversion nanoprobes assisted by magnetic separation for effective isolation and sensitive detection of circulating tumor cells

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Nano Research 2014年第9期7卷 1327-1336页

作者： Shuai Fang Chao Wang Jian Xiang Liang Cheng xuejiao song Ligeng xu Rui Peng Zhuang Liu Institute of Functional Nano & Soft Materials (FUNSOM) Collaborative Innovation Center of Suzhou Nano Science and TechnologySoochow University Suzhou Jiangsu 215123 China

Detection of circulating tumor cells （CTCs） plays an important role in cancer diagnosis and prognosis. In this study, aptamer-conjugated upconversion nano- particles （UCNPs） are used for the first time as nanoprobes to recognize tumor cells, which are then enriched by attaching with magnetic nanoparticles （MNPs） and placing in the presence of a magnetic field. Owing to the autofluorescence- free nature of upconversion luminescence imaging, as well as the use of magnetic separation to further reduce background signals, our technique allows for highly sensitive detection and collection of small numbers of tumor cells spiked into healthy blood samples, and shows promise for CTC detection in medical diagnostics.

关键词： circulating tumar cell (CTC)detection upconversion nanoparticles magnetic nanoparticles aptamer

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Arsenic Trioxide Combining Leflunomide Activates Nrf2-ARE-HO-1 Signaling Pathway and Protects Heart Xenografts

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Chinese Journal of Integrative Medicine 2021年第10期27卷 760-766页

作者： WANG Teng-da xu song-lin YU Zheng-yi Nl Shao-bin ZHANG Cheng JIAO Zhi-xing Department of Urology The First Affiliated Hospital of Harbin Medical UniversityHarbin(150000)China

Objective:To investigate the molecular mechanisms underlying the effects of arsenic trioxide(As_(2)0_(3))in combination with leflunomide on the hamster-to-rat heart ***:Transplantation of LVG hamster hearts to Lewis rats was performed by anastomosis of vessels in the neck using end-to-end anastomosis with a non-suture cuff *** groups of recipient rats(n=6 in each)were treated with normal saline(control),As_(2)0_(3)[5 mg/(kg*day)intraperitoneally],leflunomide[5 mg/(kg*d)orally],or leflunomide[5 mg/(kg.d)+As_(2)0_(3)5 mg/(kg.d)]in *** hearts and/or rat spleens were harvested and analyzed 4 days after *** reverse-transcription polymerase chain reaction and Western blot analysis were performed to detect the expression of the nuclear factor erythroid-derived factor 2-related factor(Nrf2)and its target gene heme oxygenase-1(HO-1),Treg cell marker fork-head Box P3(FOXP3),apoptosis-associated proteins Bcl-2,Bax,and cleaved *** staining was used to detect the levels of inflammatory natural killer cell and macrophage infiltration,intercellular cell adhesion molecule-1(ICAM-1)and complement ***:Expression of Nrf2-ARE-HO-1 signaling pathway was upregulated in heart xenografts in rats treated with As_(2)0_(3) plus leflunomide compared with control rats or rats treated with either drug alone(P<0.01),and this was accompanied by an increased Treg cells in the recipient rat spleen(P<0.01).In contrast,the expressions of Bax,cleaved caspase-3,ICAM-1,and complement C3,and infiltration of inflammatory cells in the xenografts were inhibited by As_(2)0_(3) plus leflunomide treatment(P<0.01).Conclusion:Combination treatment with As_(2)0_(3) and leflunomide protected hamster heart-xenografts in recipient rats.

关键词： arsenic trioxide leflunomide Nrf2-ARE-HO-1 signaling pathway inflammation infiltration xenotransplantation

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Femoral epithelioid hemangioendothelioma detected with magnetic resonance imaging and positron emission tomography/computed tomography:A case report

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World Journal of Clinical Cases 2021年第6期9卷 1353-1358页

作者： Hong-Guang Zhao Ke-Wei Zhang Sen Hou Yu-Yin Dai song-Bai xu Department of Nuclear Medicine The First Hospital of Jilin UniversityChangchun 130021Jilin ProvinceChina Department of Thoracic Surgery The First Hospital of Jilin UniversityChangchun 130021Jilin ProvinceChina Department of Neurosurgery The First Hospital of Jilin UniversityChangchun 130021Jilin ProvinceChina

BACKGROUND Epithelioid hemangioendothelioma(EHE)is an uncommon low-grade aggressive vascular *** can occur in almost all locations,but is rarely encountered in *** SUMMARY We report a 23-year-old man who presented with left hip pain with no obvious cause.X-ray revealed bone destruction in the left femoral neck with sclerosis at the edges of the *** resonance imaging(MRI)showed bone destruction in the medullary cavity of the left femoral head and neck.18Fdeoxyglucose-positron emission tomography/computed tomography(PET/CT)imaging showed bone destruction in the left ischium,acetabulum,and left femoral head neck,accompanied by increased radioactive uptake;the maximum standard uptake value was *** examination revealed spindleshaped mesenchymal tissue hyperplasia with scattered epithelioid *** patient underwent left femoral head replacement *** signs of recurrence were observed as of the 18-mo *** The definitive diagnosis of femoral EHE can be established aided by the MRI and PET/CT findings.

关键词： Bone radiography Hemangioendothelioma Epithelioid Vascular tumor Pathology Case report

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Semantic Session Analysis for Web Usage Mining

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Wuhan University Journal of Natural Sciences 2007年第5期12卷 773-776页

作者： ZHANG Hui song Hantao xu Xiaomei Department of Computer Science and Engineering Beijing Institute of Technology Beijing 100081 China

A semantic session analysis method partitioning Web usage logs is presented. Semantic Web usage log preparation model enhances usage logs with semantic. The Markov chain model based on ontology semantic measurement is used to identifying which active session a request should belong to. The competitive method is applied to determine the end of the sessions. Compared with other algorithms, more successful sessions are additionally detected by semantic outlier analysis.

关键词： Web usage mining Web log preparation session analysis

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Osteoclasts control endochondral ossification via regulating acetyl-CoA availability

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Bone Research 2024年第3期12卷 720-733页

作者： Daizhao Deng Xianming Liu Wenlan Huang Sirui Yuan Genming Liu Shanshan Ai Yijie Fu Haokun xu Xinyi Zhang Shihai Li song xu Xiaochun Bai Yue Zhang Department of Cell Biology School of Basic Medical ScienceSouthern Medical UniversityGuangzhou 510515 GuangdongChina Department of Physiology School of Basic Medical ScienceSouthern Medical UniversityGuangzhou 510515 GuangdongChina Department of Orthopaedics Nanfang HospitalSouthern Medical UniversityGuangzhou 510515 GuangdongChina

Osteoclast is critical in skeletal development and fracture healing,yet the impact and underlying mechanisms of their metabolic state on these processes remain ***,by using osteoclast-specific small GTPase Rheb1-knockout mice,we reveal that mitochondrial respiration,rather than glycolysis,is essential for cathepsin K(CTSK)production in osteoclasts and is regulated by Rheb1 in a mechanistic target of rapamycin complex 1(mTORC1)-independent manner.

关键词： healing skeletal cathepsin

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