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Acta Metallurgica Sinica(English Letters) 2011年第5期24卷 405-414页

作者： jun chen Huaining chen Jinq chen Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China

At great depth ratio, two methodologies based on the representative strain were improved to extract mechanical properties of metallic engineering structural materials from P-h curve of an indentation response. The improved aspects include： the com- bination of great ratio h1/R=0.1 and h2/R=0.4 replaced h1/R=0.01 and h2/R=0.06 （Cao＇s method） and h1/R=0.1 and h2/R=0.3 （Ogasawara＇s method）; three types of metallic engineering structural materials with obviously different elastic modulus were dealt with to get their calculation parameters, respectively; a new parameter reflecting the effect of work-hardening exponent n was introduced to get the dimensionless function which is independent of n and a relationship between W/（h3σrS） and E^＊/（σrS） at great depth ratio. By using the results of finite element simulation, the efficiency and accuracy of the improved method have been proved, and it showed that the accuracv of the improved method is much better than the former method.

关键词： Spherical indentation Representative strain Metallicengineering structural material Mechanical property Great depth ratio

Distribution of diatoms in the water and surface sediments of southern South China Sea

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Chinese Science Bulletin 2006年第B12期51卷 76-80页

作者： LU jun chen Muhong chen Zhong CAS Key Laboratory of Marginal Sea Geology South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou 510301 China

The relationship of species and abundance between the diatoms in the water and sediments from the southern South China Sea (SCS)were discussed, and the key environmental controlling factors were also investigated. Studies show thathe diatom abundance is high in both water andsediments in the southeast part of the southern SCSand the varying trend is similar, while in the northwespart, the abundance is low, and the varying trend isdifferent. The dominant diatom species are Thalassionema nitzschioides and Nitzschia bicapitata inwater, and T. nitzschioides and Chaetoceros messanensis in sediments. The diatom species of smalsize and thin shell in water are more than in thesediments, while the diatom species of large size andthick shell in water are less. The percentage of species T. nitzschioides is higher in water of southeaspart than in that of northwest part, but it is similar insediments of both areas. It is shown that the southwest monsoon is the important factor influencingdiatom abundance and T. nitzschioides percentageand when the southwest monsoon is well developedthe distribution of diatom abundance and T. nitzschioides percentage are consistent in both water andsediments of the study area.

关键词：南海南部海域硅藻属水体沉积物分布东南季风

Malignant pheochromocytoma with cerebral and skull metastasis: A case report and literature review

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World Journal of Clinical Cases 2021年第12期9卷 2791-2800页

作者： jun-chen chen Dong-Zhou Zhuang cheng Luo Wei-Qiang chen Department of Neurosurgery The First Affiliated Hospital of Shantou University Medical CollegeShantou 515041Guangdong ProvinceChina

BACKGROUND Malignant pheochromocytoma with cerebral and skull metastasis is a very rare *** our case with 16 previously reported cases identified from a PubMed search,an analysis of 17 cases of malignant cerebral pheochromocytoma was *** literature review aimed to provide information on clinical manifestations,radiographic and histopathological features,and treatment strategies of this *** SUMMARY A 60-year-old man was admitted with a progressive headache and enlarging scalp mass lasting for 3 *** images revealed a left temporal biconvexshaped epidural mass and multiple lytic *** patient underwent a left temporal craniotomy for resection of the temporal *** analysis led to identification of the mass as malignant *** patient’s symptoms were alleviated at the postoperative 3-mo clinical ***,metastatic pheochromocytoma lesions were found on the right 6th rib and the 6th to 9th thoracic vertebrae on a 1-year clinical follow-up computed tomography *** Magnetic resonance spectroscopy and histopathological examination are necessary to make an accurate differential diagnosis between malignant cerebral pheochromocytoma and *** is regarded as the first choice of treatment.

关键词： Malignant pheochromocytoma Catecholamine-secreting Cerebral metastasis Skull metastasis Meningioma Magnetic resonance spectroscopy Case report

Effect of Oxygen Partial Pressure on Phase Equilibria and Liquidus in CaO-Al_2O_3-FeO_x System

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Journal of Iron and Steel Research International 2012年第11期19卷 8-12页

作者： WANG Nan HUANG Wei-jun chen Shuai-chao chen Min School of Materials and Metallurgy Northeastern University Shenyang 110819 Liaoning China

A high temperature equilibration experiment was carried out to investigate the effect of oxygen partial pres- sure on the phase equilibria and liquidus in CaO-Al2O3- FeOx system with the intermediate oxygen partial pressures of 10.13 Pa and 1.01 × 10^-3 Pa. The equilibrated phases and their compositions of the quenched samples were analyzed by using SEM/EPMA （Scanning Electron Microscope/Electron Probe Micro Analysis） and XRD （X Ray Diffraction）. The phase equilibrium results include two cases, the two phase coexistence and the three-phase coexistence in the high Al2O3 region with oxygen partial pressure of either 10.13 Pa or 1.01 × 10^-3 Pa. Effects of oxygen partial pressure and temperature on the liquidus along the primary phase fields of CaO · Al2O3 and CaO · 2Al2O3 were nota hle. With the decrease of oxygen partial pressure, the liquid area expands and the liquidus of CaO · Al2O3 and CaO · 2Al2O3 primary fields moves to the Al2O3-FeOx region. On the other hand, the liquid area of CaO Al2O3-FeOx sys tem extends extremely to the high Al2O3 region with the temperature increasing from 1 400 to 1 500℃, especially at lower oxygen partial pressure. The present experiment results are in good agreement with the calculated ones by FactSage.

关键词： oxygen partial pressure liquidus phase equilibrium CaO-Al2O3 FeOx system

Enhanced electrochemical performance of Si/C electrode through surface modification using SrF_(2) particle

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International Journal of Minerals,Metallurgy and Materials 2021年第10期28卷 1621-1628页

作者： jun Yang Yuan-hua Lin Bing-shu Guo Ming-shan Wang jun-chen chen Zhi-yuan Ma Yun Huang Xing Li School of New Energy and Materials Southwest Petroleum UniversityChengdu 610500China

The silicon-based material exhibits a high theoretical specific capacity and is one of the best anode for the next generation of advanced lithium-ion batteries(LIBs).However,it is difficult for the silicon-based anode to form a stable solid-state interphase(SEI)during Li alloy/de-alloy process due to the large volume change(up to 300%)between silicon and Li4.4Si,which seriously limits the cycle life of the ***,we use strontium fluoride(SrF_(2))particle to coat the silicon-carbon(Si/C)electrode(SrF_(2)@Si/C)to help forming a stable and high mechanical strength SEI by spontaneously embedding the SrF_(2) particle into *** the formed SEI can inhibit the volume expansion of the silicon-carbon anode during the *** electrochemical test results show that the cycle performance and the ionic conductivity of the SrF_(2)@Si/C anode has been significantly *** X-ray photoelectron spectroscopy(XPS)analysis reveals that there are fewer electrolyte decomposition products formed on the surface of the SrF_(2)@Si/C *** study provides a facile approach to overcome the problems of Si/C electrode during the electrochemical cycling,which will be beneficial to the industrial application of silicon-based anode materials.

关键词： silicon-based anode volume expansion strontium fluoride solid electrolyte interface cycling stability

Biodegrading Wheat Bran with Agaricus blazei and Its Effects on Intestinal Development Identified with Mice

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Journal of Integrative Agriculture 2012年第3期11卷 456-464页

作者： SHEN Heng-sheng chen jun-chen WU Li LI Yi-bin Ting Zhou Agri-Food Processing Research Center Fujian Academy of Agricultural Sciences Fuzhou 350003 P.R.China Guelph Food Research Centre Agriculture and Agri-Food Canada Guelph N1G 5C9 Canada

Agaricus blazei Murill is a well known edible/medicinal mushroom used for immune-nutrient food *** biodegradation of different substrates with this fungus may result in different metabolites and degraded compounds,which may enrich the function of the food *** this study,soluble compounds from the culture of *** grown in liquid media with whole wheat bran and its water filtrate,respectively,were *** soluble sugar,arabinoxylan,protein,and amino acids were significantly higher in the fungal culture resulted from the medium with whole wheat bran （43.54,1.56,0.59,and 2.19 mg mL^-1,respectively） than that from the medium with the bran filtrate （17.28,0.37,0.13,and 1.13 mg mL^-1,respectively）.The biodegraded wheat bran with cultured mycelia was fed to Mus musculus Linnaeus as supplementation or as dietary fiber exclusive *** non-specific food therapies,feeding effects on mice intestinal development were indicated indirectly in growth performance,intestinal absorption and serum *** to feeding uncultured wheat bran,feeding mice with culture mixes of *** resulted in remarkably increase in villus height and villus height/crypt depth ratio,which were increased by 25.4 and 31.0%,respectively,when applied as supplementation,and by 44.3 and 43.4%,respectively,when applied as dietary *** increases are concomitant with the higher level of D-xylose in blood serum about 16.9 and 29.2% as supplementation and dietary fiber,*** results implying that culturing *** with whole wheat bran enhanced extracellular metabolism of the fungus and extensive degradation of wheat bran insoluble fibrous ***,feeding the culture mix including metabolites and degraded wheat bran improved intestinal villus development,proving the nutritional benefits of the *** mycelial cultures.

关键词： Agaricus blazei mycelium metabolite wheat bran submerged culture dietary fiber mice intestinal villus

Simultaneous refinement of α-Mg grains and β-Mg_(17)Al_(12) in Mg-Al based alloys via heterogeneous nucleation on Al_(8)Mn_(4)Sm

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Journal of Magnesium and Alloys 2023年第1期11卷 348-360页

作者： jun-chen chen Mei-Xuan Li Zhi-Yang Yu Zhao-Yuan Meng cheng Wang Zhi-Zheng Yang Hui-Yuan Wang State Key Laboratory of Automotive Simulation and Control Jilin UniversityChangchun 130012PR China Key Laboratory of Automobile Materials of Ministry of Education&School of Materials Science and Engineering Jilin UniversityNanling CampusNo.5988 Renmin StreetChangchun 130025PR China International Center of Future Science Jilin UniversityChangchun 130012PR China

Due to the significant differences in the formation temperature and crystal structure between the primaryα-Mg and eutecticβ-Mg_(17)Al_(12),it is a great challenge to achieve simultaneous refinement of the primary and eutectic phases in Mg-Al based alloys via heterogeneous ***,we found that theα-Mg andβ-Mg_(17)Al_(12) in the AZ80 alloy can be simultaneously refined after 0.2 wt.%Sm addition,with the grain size decreasing from∼217±15μm to∼170±10μm and theβ-Mg_(17)Al_(12) morphology changing from a typical continuous network to a nod-like or spherical *** simultaneous refinement mechanism is investigated through solidification simulation,transmission electron microscopy(TEM),and differential thermal analysis(DTA).In the AZ80-0.2Sm alloy,many Al8Mn4Sm particles can be observed near the center of theα-Mg grains or inside theβ-Mg_(17)Al_(12).Crystallographic calculations further reveal that the Al8Mn4Sm has good crystallographic matching with both theα-Mg andβ-Mg_(17)Al_(12),so it possesses the potency to serve as heterogeneous nucleation sites for both *** promoted heterogeneous nucleation on the Al8Mn4Sm decreases the undercooling required by the nucleation of the primary and eutectic phases,which enhances the heterogeneous nucleation rate,thus causing the simultaneous refinement of theα-Mg andβ-Mg_(17)Al_(12).The orientation relationships between the Al8Mn4Sm and Mg/Mg_(17)Al_(12) are identified,which are[1210]_(Mg)//[010]_(Al8Mn4Sm),(1010)_(Mg)//(301)_(Al8Mn4Sm) and[112]_(Mg_(17)Al_(12))//[010]_(Al8Mn4Sm),(110)_(Mg_(17)Al_(12))//(301)_(Al8Mn4Sm),***,the refinement of theβ-Mg_(17)Al_(12) accelerates its dissolution during the solution treatment,which is beneficial for cost saving in industrial *** Al8Mn4RE compounds such as Al8Mn4Y might have the same positive effect on the simultaneous refinement due to the similar physicochemical properties of rare earth *** work not only proves the po

关键词： Magnesium alloys Microstructure refinement Primaryα-Mg Eutecticβ-Mg_(17)Al_(12) Rare earth Heterogeneous nucleation

Losartan reduced connexin43 expression in left ventricular myocardium of spontaneously hypertensive rats

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2008年第6期9卷 448-454页

作者： Li-li ZHAO Hong-juan chen jun-zhu chen Min YU Yun-lan NI Wei-fang ZHANG Department of Cardiology the First Affiliated Hospital School of Medicine Zhejiang University Hangzhou 310003 China

Objective:To assess the effect of angiotensin II type 1(AT1)receptor antagonist losartan on myocardium con- nexin43(Cx43)gap junction(GJ)expression in spontaneously hypertensive rats(SHRs)and investigate possible mechanisms. Methods:Sixteen 9-week-old male SHRs and 8 age-matched male Wistar-Kyoto(WKY)rats were included in this *** were randomly divided into two groups to receive losartan at 30 mg/(kg·d)by oral gavage once daily for 8 weeks(SHR-L)or vehicle(0.9%saline)to act as controls(SHR-V);WKY rats receiving vehicle for 8 weeks served as normotensive *** the end of the experiment,rats were sacrificed and the hearts were *** of Cx43 and nuclear factor-kappaB p65 (NF-κB p65)proteins in all three groups were observed and further investigations on the effect of angiotensin II type 1 receptor antagonist losartan(30 mg/(kg·d),8 weeks)on Cx43 expression were conducted with Western blot and immunohistochemistry. NF-κB p65 protein in nuclear extracts was determined by Western ***:Left ventricular(LV)hypertrophy was prominent in SHRs,Cx43 and NF-κB p65 protein expressions were obviously upregulated and Cx43 distribution was dispersed over the cell *** with losarton reduced the over-expressions of Cx43 and NF-κB p65 in LV *** distribution of Cx43 gap junction also became much regular and confined to intercalated disk after losartan ***- sion:Cx43 level was upregulated in LV myocardium of SHR during early stage of *** II type 1 receptor antagonist losartan prevented Cx43 gap junction remodeling in hypertrophied left ventricles,possibly through the NF-κB pathway.

关键词： Connexin43 (Cx43) Left ventricular (LV) hypertrophy Angiotensin II Nuclear factor-kappaB p65 (NF-κB p65) Gap junction (GJ)

Boost VS_(2) electrochemical reactive kinetics by regulating crystallographic planes and coupling carbon matrix for high performance sodium-ion storage

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Rare Metals 2024年第1期43卷 98-112页

作者： Min Zeng Ming-Shan Wang Lin chen En-Zhi Li Zhen-Liang Yang Dan Zhou Hai-Jiao Xie jun-chen chen Zhi-Yuan Ma Bing-Shu Guo Bo Yu Xing Li School of New Energy and Materials Southwest Petroleum UniversityChengdu 610500China Energy Storage Research Institute Southwest Petroleum UniversityChengdu 610500China Institute of Materials China Academy of Engineering PhysicsMianyang 621908China Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and TechnologyBeijingBeijing 100083China Hangzhou Yanqu Information Technology Co. Ltd.Hangzhou 310003China

Vanadium disulfide(VS_(2)) as a typical two-dimensional transition metal chalcogenide has excellent competitiveness for sodium-ion storage due to its wide layer spacing(0.575 nm),high theoretical capacity of 932mAh·g^(-1) originating from multi-electron electrochemical ***,continuous sodiation process accompanied by crystal structural evolution and collapse cause rapid capacity ***,novel few-layer VS_(2)nanosheets with open(001) crystal planes are in-situ constructed on reduced graphene oxide to solve these issues mentioned *** indicates that few-layer VS_(2)provides more Na^(+) storage activity due to the low Na^(+)surface migration energy barrier on exposed crystal(001)*** flexible and high electronic conductivity of carbon matrix also effectively builds multi-level buffer structure and electron transport kinetics to boost the Na^(+)insertion/conversion reactive activity on VS_(2) as well as Na^(+) pseudocapacitance storage kinetics on edges and defects of nano *** coupling effects result in high rate capability and long cycling stability as a battery/capacitor *** delivers conspicuous high energy density of 81 and 40 Wh·kg^(-1) at power density of 118 and 10,286W·kg^(-1),as well as 80% energy retention rate after 5000cycles,confirming its great application potential in sodiumbased storage devices.

关键词： Vanadium disulfide Reduced graphene oxide Anode Sodium-ion battery Sodium-ion capacitor

Subdural empyema complicated with intracranial hemorrhage in a postradiotherapy nasopharyngeal carcinoma patient: A case report and review of literature

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World Journal of Clinical Cases 2018年第14期6卷 825-829页

作者： jun-chen chen Dian-Hui Tan Ze-Bin Xue Sen-Yuan Yang Yong Li Run-Long Lai Department of Neurosurgery First Affiliated Hospital of Shantou University Medical College

The prevalence of nasopharyngeal carcinoma(NPC) is higher in southern China, Hong Kong, and Taiwan than in other areas in the world. Radiotherapy is an important part of treatment for NPC patients, especially those with stage Ⅲ/Ⅳ disease. Subdural empyema is a rare but life-threatening complication in postradiotherapy NPC patients which should be paid more attention. Here, we present the case of a 64-year-old female postradiotherapy NPC patient with subdural empyema complicated with intracranial hemorrhage. She was treated by burr-hole surgery but unfortunately died because of recurrent intracranial hemorrhage. The mechanisms potentially underlying the formation of subdural empyema in postradiotherapy NPC patients and the surgical strategies that can be used in these patients are discussed in this report.

关键词： Intracranial hemorrhage Nasopharyngeal carcinoma Postradiotherapy Subdural empyema Case report