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Light-induced stepped thermal relaxation in a Hofmann-type metal-organic framework

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Science China Chemistry 2024年第6期67卷 1983-1989页

作者： Wen Cui wei-wei wu Ze-Yu Ruan Yan-Cong Chen guang-Jun Zeng Guan-Xi Chen Si-Guo wu Zhao-Ping Ni Ming-Liang Tong Key Laboratory of bioinorganic and Synthetic Chemistry of Ministry of Education School of ChemistryInstitute of Green Chemistry and Molecular EngineeringGuangdong Basic Research Center of Excellence for Functional Molecular EngineeringSun Yat-sen UniversityGuangzhou510275China

Spin-crossover(SCO)materials with light-induced multistability have potential applications in multi-addressable opto-magnetic memory devices and multiple ***,we reported a three-dimensional Hofmann-type metal-organic framework(MOF)[Fe(bpy){Pt(CN)_(4)}]·coumarin(1·coumarin,bpy=4,4′-bipyridine),which exhibits an incomplete and hysteretic SCO *** importantly,the light-induced stepped thermal relaxation(LISTR)with obvious magnetic plateau for a hidden intermediate spin state is firstly *** hidden spin state is also observed for the first time in the thermal relaxation after light-assisted spin state annealing(LASSA).Meanwhile,an extremely rare bi-directional light-induced excited spin-state trapping(LIESST)with the highest reverse-LIESST temperature is ***,five spin states can be captured in 1·coumarin and the tristability can be modulated below 102 K through the excitation-relaxation ***,the light-and temperatureinduced multistability provides a new strategy for developing multistable materials.

关键词： light magnetic multistability iron metal-organic framework spin-crossover

Effects of Transformer DC bias and the Relationship Between UHVDC Grounding Current and Grounding Resistances

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高电压技术 2008年第12期34卷 2530-2535页

作者： JIANG wei wu guang-ning XIAO Hua huang Zhen Saleh Yahya Muhammed GUAN Lan School of Electrical Engineering Southwest Jiaotong University Chengdu 610031 China Sichuan Electric Power Company Chengdu 610061 China

Recently years,UHVDC transmission system is paid more attention to in the field of China's power *** takes key part in the China electrical power development ***,many problems are caused by UHVDC system,such as DC bias,corrosion of metal underground and so *** bias is harm to the transformers nearby UHVDC grounding *** this paper,the influences of DC grounding current on transformer are introduced and some suggestions of DC bias solution were ***,the relationship between UHVDC Grounding Current and grounding Resistance of Substation was ***,two-part network circuit was used to equivalent the grounding ***,an analysis of rules was done between DC bias current and grounding ***,the conclusion is given that DC bias current rises fast as DC grounding resistance or AC grounding resistance *** drops when resistance of AC transmission line or interaction resistance between DC grounding system and AC grounding system *** AC grounding resistance and DC grounding resistance is important to restrain DC bias *** resistance of AC transmission line such as adding resistance into transformer neutral-point grounding is a useful way to limit DC bias current.

关键词： UHVDC 变压器直流偏磁接地电阻

Preoperative contrast-enhanced computed tomography-based radiomics model for overall survival prediction in hepatocellular carcinoma

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World Journal of Gastroenterology 2022年第31期28卷 4376-4389页

作者： Peng-Zhan Deng bi-Geng Zhao Xian-Hui huang Ting-Feng Xu Zi-Jun Chen Qiu-Feng wei Xiao-Yi Liu Yu-Qi Guo Sheng-guang Yuan wei-Jia Liao Laboratory of Hepatobiliary and Pancreatic Surgery Affiliated Hospital of Guilin Medical UniversityGuilin 541001Guangxi Zhuang Autonomous RegionChina

BACKGROUND Hepatocellular carcinoma(HCC)is the most common primary liver malignancy with a rising incidence *** prognosis of HCC patients after radical resection remains *** is a novel machine learning method that extracts quantitative features from medical images and provides predictive information of cancer,which can assist with cancer diagnosis,therapeutic decision-making and prognosis *** To develop and validate a contrast-enhanced computed tomography-based radiomics model for predicting the overall survival(OS)of HCC patients after radical *** A total of 150 HCC patients were randomly divided into a training cohort(n=107)and a validation cohort(n=43).Radiomics features were extracted from the entire tumour *** least absolute shrinkage and selection operator algorithm was applied for the selection of radiomics features and the construction of the radiomics *** and multivariate Cox regression analyses were used to identify the independent prognostic factors and develop the predictive nomogram,incorporating clinicopathological characteristics and the radiomics *** accuracy of the nomogram was assessed with the concordance index,receiver operating characteristic(ROC)curve and calibration *** clinical utility was evaluated by decision curve analysis(DCA).Kaplan–Meier methodology was used to compare the survival between the low-and high-risk *** In total,seven radiomics features were selected to construct the radiomics *** to the results of univariate and multivariate Cox regression analyses,alpha-fetoprotein(AFP),neutrophil-to-lymphocyte ratio(NLR)and radiomics signature were included to build the *** C-indices of the nomogram in the training and validation cohorts were 0.736 and 0.774,*** curve analysis for predicting 1-,3-,and 5-year OS confirmed satisfactory accuracy[training cohort,area under the curve(AUC)=0.850,0.791 and

关键词： Hepatocellular carcinoma Radiomics Contrast-enhanced computed tomography Survival prediction

Differential stem cell aging kinetics in Hutchinson-Gilford progeria syndrome and Werner syndrome

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Protein & Cell 2018年第4期9卷 333-350页

作者： Zeming wu weiqi Zhang Moshi Song wei Wang Gang wei wei Li Jinghui Lei Yu huang Yanmei Sang Piu Chan Chang Chen Jing Qu Keiichiro Suzuki Juan Carlos Izpisua Belmonte guang-Hui Liu State Key Laboratory of Stem Cell and Reproductive biology Institute of Zoology Chinese Academy of Sciences Beijing 100101 China National Laboratory of biomacromolecules CAS Center for Excellence in Biomacromolecules Institute of Biophysics Chinese Academy of Sciences Beijing 100101 China University of Chinese Academy of Sciences Beijing 100049 China National Clinical Research Center for Geriatric Disorders Xuanwu Hospital of Capital Medical University Beijing 100053 China State Key Laboratory of biomembrane and Membrane biotechnology Institute of Zoology Chinese Academy of SciencesBeijing 100101 China Key Laboratory of Computational biology CAS-MPG Partner Institute for Computational Biology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences Shanghai 200031 China Department of Medical genetics School of Basic Medical Sciences Peking University Health Science Center Beijing100191 China Department of Pediatric Endocrinology and Genetic Metabolism Beijing Children's Hospital Capital Medical UniversityNational Center for Children's Health Beijing 100045 China Institute for Advanced Co-Creation Studies Osaka University Osaka 560-8531 Japan Graduate School of Engineering Science Osaka University Osaka 560-8531 Japan Gene Expression Laboratory Salk Institute for Biological Studies La Jolla 92037 USA Key Laboratory of Regenerative Medicine of Minist~ of Education Institute of Aging and Regenerative Medicine JinanUniversity Guangzhou 510632 China

progeria syndrome （HGPS） and Wemer syndrome （WS） are two of the best characterized human progeroid syndromes. HGPS is caused by a point mutation in lamin A （LMNA） gene, resulting in the production of a truncated protein product-progerin. WS is caused by mutations in 14/RN gem）, encoding a loss-of-function RecQ DNA helicase. Here, by gene editing we created isogenic human embryonic stem cells （ESCs） with heterozygous （G608G/＋） or homozygous （G608G/G608G） LMNA mutation and biallelic WRN knockout, for modeling HGPS and WS pathogenesis, respectively. While ESCs and endothelial cells （ECs） did not present any features of premature senescence, HGPS- and WS-mesenchymal stem cells （MSCs） showed aging-associated phenotypes with different kinetics. WS-MSCs had early-onset mild premature aging phenotypes while HGPS-MSCs exhibited iate-onset acute premature aging characterisitcs. Taken together, our study compares and contrasts the distinct pathologies underpinning the two premature aging disorders, and provides reliable stem-cell based models to identify new therapeutic strategies for pathological and physiological aging.

关键词： WRN lamin HGPS Werner syndrome,stem cell aging

biochemical sensing in graphene-enhanced microfiber resonators with individual molecule sensitivity and selectivity

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Light(Science & Applications) 2019年第1期8卷 173-182页

作者： Zhongxu Cao Baicheng Yao Chenye Qin Run Yang Yanhong Guo Yufeng Zhang Yu wu Lei bi Yuanfu Chen Zhenda Xie Gangding Peng Shu-wei huang Chee wei Wong Yunjiang Rao Key Laboratory of Optical Fiber Sensing and Communications(Education Ministry of China) University of Electronic Science and Technology of ChinaChengdu 611731China State Key Lab of Electronic Thin Film and Integrated Devices University of Electronic Science and Technology of ChinaChengdu 611731China National Laboratory of Solid State Microstructures and School of Electronic Science and Engineering Nanjing UniversityNanjing 210093China School of Electrical Engineering and Telecommunications University of New South WalesSydneyNSW 2052Australia Department of Electrical Computerand Energy EngineeringUniversity of Colorado BoulderBoulderCO 80309USA Fang Lu Mesoscopic Optics and Quantum Electronics Laboratory University of CaliforniaLos AngelesCA 90095USA Ubiquitous Sensing Center Zhejiang LaboratoryHangzhou 310000China

Photonic sensors that are able to detect and track biochemical molecules offer powerful tools for information acquisition in applications ranging from environmental analysis to medical *** ultimate aim of biochemical sensing is to achieve both quantitative sensitivity and *** atomically thick films with remarkable optoelectronic tunability,graphene and its derived materials have shown unique potential as a chemically tunable platform for sensing,thus enabling significant performance enhancement,versatile functionalization and flexible device ***,we demonstrate a partially reduced graphene oxide(prGO)inner-coated and fiber-calibrated Fabry-Perot dye resonator for biochemical *** functionalization in the prGO film enables the intracavity fluorescent resonance energy transfer(FRET)to be chemically selective in the visible ***,by measuring the intermode interference via noise canceled beat notes and locked-in heterodyne detection with Hz-level precision,we achieved individual molecule sensitivity for dopamine,nicotine and single-strand DNA *** work combines atomic-layer nanoscience and high-resolution optoelectronics,providing a way toward high-performance biochemical sensors and systems.

关键词： resonator versatile enable

Solvent effect on the synthesis of monodisperse amine-capped Au nanoparticles

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Chinese Chemical Letters 2013年第6期24卷 457-462页

作者： bing-Hui wu Hua-Yan Yang Hua-Qi huang guang-Xu Chen Nan-Feng Zheng State Key Laboratory for Physical Chemistry of Solid Surfaces and Department of Chemistry College of Chemistry and Chemical EngineeringXiamen University

A remarkable solvent effect in a single-phase synthesis of monodisperse amine-capped Au nanoparticles is ***-capped Au nanoparticles were prepared via the reduction of HAuCU by an amine-borane complex in the presence of oleylamine in an organic *** linear or planar hydrocarbon（e.g.,n-hexane,n-octane,1-octadecylene,benzene,and toluene） was used as the solvent, high-quality monodisperse Au nanoparticles with tunable sizes were ***,Au nanoparticles with poor size dispersity were obtained when tetralin,chloroform or cyclohexane was used as the *** revealed solvent effect allows the controlled synthesis of monodisperse Au nanoparticles with tunable size of 3-10 nm.

关键词： Solvent effect Au nanoparticles Amine Monodispersity

High-entropy(Sm_(0.2)Eu_(0.2)Gd_(0.2)Dy_(0.2)Er_(0.2))_(2)Hf_(2)O_(7) ceramic with superb resistance to radiation-induced amorphization

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Journal of Materials Science & Technology 2023年第24期155卷 1-9页

作者： Jingxin wu Meng Zhang Zhanqiang Li Minzhong huang Huiming Xiang Liyan Xue Zhengming Jiang Zhigang Zhao Lianfeng wei Yong Zheng Fan Yang guang Ran Yanchun Zhou Heng Chen School of Rare Earths University of Science and Technology of China Hefei 230026 China Ganjiang Innovation Academy Chinese Academy of Sciences Ganzhou 341000 China Xiamen Institute of Rare Earth Materials Haixi Institute Chinese Academy of Sciences Xiamen 361021 China Fujian Province Joint Innovation Key Laboratory of Fuel and Materials in Clean Nuclear Energy System Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou 350002 China Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou 350108 China Science and Technology on Advanced Functional Composite Laboratory Aerospace Research Institute of Materials & Processing Technology Beijing 100076 China The Key Nuclear Fuel and Nuclear Materials Laboratory of China Nuclear Power Institute of China Chengdu 610213 China China Rare Earth Group Co. Ltd. Chengdu 610213 China College of Energy Xiamen University Xiamen 361102 China School of Materials Science and Engineering Zhengzhou University Zhengzhou 450001 China

Nuclear engineering materials are required to possess outstanding extreme environmental tolerance and irradiation resistance.A promising novel pyrochlore-type of(Sm_(0.2)Eu_(0.2)Gd_(0.2)Dy_(0.2)Er_(0.2))2 Hf_(2)O_(7)high-entropy ceramic(HE-RE2 Hf_(2)O_(7))for control rod was prepared by solid-state reaction *** ion irradiation of HE-RE_(2) Hf_(2)O_(7)with 400 keV Kr+at 400℃was investigated using a 400 kV ion implanter and compared with single-component pyrochlore Gd2 Hf_(2)O_(7)to evaluate the irradiation *** HE-RE2 Hf_(2)O_(7),the phase transition from pyrochlore to defective fluorite is revealed after irradiation at 60 *** irradiation at 120 dpa,it maintained crystalline,which is comparable to Gd2 Hf_(2)O_(7)but superior to the titanate pyrochlores previously ***,the lattice expansion of HE-RE2 Hf_(2)O_(7)(_(0.2)2%)is much lower than that of Gd2 Hf_(2)O_(7)(0.62%),indicating excellent irradiation damage *** tests displayed an irradiation-induced increase in hardness and a decrease in elastic modulus by about 2.6%.Irradiation-induced segregation of elements is observed on the surface of irradiated *** addition,HE-RE2 Hf_(2)O_(7)demonstrates a more sluggish grain growth rate than Gd2 Hf_(2)O_(7)at 1200℃,suggesting better high-temperature *** linear thermal expansion coefficient of HE-RE2 Hf_(2)O_(7)is 10.7×10-6 K-1 at 298–1273 *** general,it provides a new strategy for the design of the next advanced nuclear engineering materials.

关键词： High-entropy ceramic Rare earth hafnate Ion irradiation Amorphization resistance High temperature stability Nuclear safety

Localized primary gastric amyloidosis: Three case reports

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World Journal of Clinical Cases 2020年第19期8卷 4667-4675页

作者： Xue-Mei Liu Lian-Jun Di Jia-Xing Zhu Xing-Long wu Hong-Ping Li Hui-Chao wu bi-guang Tuo Department of Gastroenterology Affiliated Hospital of Zunyi Medical UniversityZunyi 563003Guizhou ProvinceChina Department of Pathology Affiliated Hospital of Zunyi Medical UniversityZunyi 563003Guizhou ProvinceChina

BACKGROUND Localized primary gastric amyloidosis is a rare disorder characterized by the extracellular deposition of insoluble fibrillary protein in the stomach and can mimic various diseases on endoscopic examination,including gastrointestinal stromal tumors,gastric cancer and *** SUMMARIES Here,we report a series of three cases of localized gastric amyloidosis mimicking gastric mucosa-associated lymphoid tissue(MALT)lymphoma on endoscopic examination that were evaluated over the past ten years in our *** different detection times of this rare disease resulted in three completely different outcomes,indicating the strong importance of early detection,diagnosis and *** difficulties encountered in making an accurate diagnosis and differential diagnosis are highlighted,and this report provides clinical experience for the diagnosis of localized primary gastric *** Localized gastric amyloidosis is a rare metabolic disease that resembles MALT *** detection,diagnosis and treatment of localized gastric amyloidosis result in an excellent prognosis.

关键词： diagnosis amyloid gastric

Novel Method for Preparation of Polypropylene Blends with High Melt Strength by Reactive Compounding

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Chemical Research in Chinese Universities 2009年第4期25卷 569-572页

作者： LIU Yu-guang huang Yu-dong ZHANG Cheng-wu HOU Jing ZHANG Xue-quan School of Chemical Engineering and Technology HarbinInstitute of Technology Harbin 150001 P. R. China Technical Physics Institute of Heilongjiang Academy of Sciences Harbin 150086 P. R. China Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 P. R. China

Ultrafine full-vulcanized polybutadiene rubber（UFBR） with particle sizes of ca.50―100 nm were used for modifying mechanical and processing performances of polypropylene（PP） with PP-g-maleic anhydride（PP-g-MA） as a compatibilizer for enhancing the interfacial adhesion between the two *** morphology,dynamical rheology response and mechanical properties of the blends were characterized by means of SEM,rheometer and tensile test,*** results show that the ternary PP/UFBR blends compatibilized with PP-g-MA possess rheological behaviors like highly branched PP,while no obvious strain hardening is observed in its control binary PP/UFBR blends,a low level of PP-g-MA in PP/UFBR blends can even endow the material with rheological characteristics of high melt strength materials like highly branched *** enhancement interfacial interaction between the UFBR particles and PP matrix accounting for the rheological behavior of compatibilized blends and effectiveness of PP-g-MA were proposed and proved.

关键词： Polypropylene High melt strength Reactive compounding Nanoparticle Rheology