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High temperature oxidation behavior of Ni-based superalloy GH586 in air

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Rare Metals 2017年第11期36卷 878-885页

作者： Jiang-Dong Cao jun-song zhang Yin-Qun Hua Zhen Rong Rui-Fang Chen Yun-Xia Ye School of Material Science and Engineering Jiangsu UniversityZhenjiang 212013 China Mechanical and Electrical Department Nantong Shipping College Nantong 226010 China School of Mechanical Engineering Jiangsu UniversityZhenj iang 212013 China

In this paper, the isothermal oxidation kinetics and oxidation behavior of GH586 superalloy from 800 to 1000℃ were investigated. The oxide scale morphologies of the surfaces and the cross sections after oxidation were characterized by means of X-ray diffraction （XRD） and scanning electron microscope （SEM） equipped with energy-dispersive spectroscopy （EDS）. The results show that the growth of the oxide scales on the surface of superalloy GH586 obeys a parabolic law with the activa- tion energy of 241.4 ***1-1 from 800 to 1000℃ The dense oxide scale formed at 800℃ is mainly composed of Cr203, NiCr204 and a small amount of TiO2. At 900℃, the oxide scale is divided into two layers： the outer layer with multiple cracks is mainly composed of ＂Cr203 and TiO2, while the inner is a layer of dense Cr203. Under the oxide scale, aluminum-rich oxides along the grain bound- aries are generated by the internal oxidation. At 1000 ℃for 100 h, cracks throughout the whole oxide film accel- erate the oxidation rate of Ni-based superalloy GH586 and large blocks of TiO2 in the oxide scale are generated, resulting in the spallation of oxide scale.

关键词： Ni-based superalloy Internal oxidation Hightemperature oxidation behavior Oxidation kinetics

Ultrafine eutectic Ti_xSn_y/TiNi composites with high damping capacity

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Rare Metals 2013年第2期32卷 196-200页

作者： jun-song zhang Li-Shan Cui Yang Shao Rui-Shi Li Shu-Jing Jiao Xiao-Hua Jiang Department of Materials Science and Engineering China University of Petroleum

Three kinds of bulk-type ultrafine TixSny/TiNi （TixSny represents Ti3Sn, Ti2Sn, and TisSn3 or Ti6Sns） composites with homogeneous eutectic microstructure were prepared by arc melting. The composites exhibit high damping capacity （tan6 greater than 1 x 10-2） and enhanced mechanical strength （the highest fracture strength is 2.15 GPa）. The damping capacity originates from TiNi and Ti3Sn, while the eutectic contributes to the mechanical strength.

关键词： Eutectic Ti2Sn TisSn3 Ti6Sn5

Characterization of CD4~+ T Cell Responses in Mice Infected with Schistosoma japonicum

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Acta Biochimica et Biophysica Sinica 2006年第5期38卷 327-334页

作者： Min-jun JI Chuan SU Yong WANG Hai-Wei WU Xiao-Ping CAI Guang-Fu LI Xiang ZHU Xin-jun WANG Zhao-song zhang Guan-Ling WU~* Department of Pathogen Biology,Nanjing Medical University,Nanjing 210029,China Department of Pathogen Biology Nanjing Medical UniversityNanjing 210029 China

To better understand the interaction between Schistosoma japonicum and its murine host,wecharacterized the immune response of CD4~+ T cells generated during an experimental *** infectionbased on different key aspects,from gene expression to cell *** oligonucleotide microarrayswere used to compare gene expression profiles of CD4~+ T cells from spleens of mice at 0,3,6 and 13weeks *** cytometry analysis was used to determine type 1 and type 2 cytokine-secretingCD4~+ T cells,to test apoptosis of CD4~+ T cells and to count CD4~+CD25~+ T cells,a kind of regulatorysubpopulation of CD4~+ T *** percentage of interleukin-4-producing CD4~+ T cells was found to bemuch higher than that of γ-interferon-producing cells,especially after stimulation with *** eggantigen,which was consistent with type 1 and type 2 cytokine gene expression in the *** also showed that *** induced the increased expression of Th2 response-related genes,whereassome transcripts related to the Th1 responsive pathway were *** cytometry analysis showeda marked increase in the apoptotic CD4~+ T cells from 6 weeks post-infection and in the ratio of CD4~+CD25~+to CD4~+ T cells in infected mice after 13 *** therefore concluded that experimental infection of micewith *** resulted in a Th2-skewed immune response,which was to a great extent monitored bythe immune regulatory network,including cytokine cross-modulation,cell apoptosis and the subpopulationof regulatory cells.

关键词： Schistosoma japonicum CD4~+ T cell immune deviation immune regulatory network

Clinical and experimental study on regional administration of phosphorus32 glassmicrospheres in treating hepatic carcinoma

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World Journal of Gastroenterology 1999年第6期5卷 492-505页

作者： LIU Lu, JIANG Zao, TENG Gao jun, song Ji Zhi, zhang Dong Sheng, GUO Qing Ming, FANG Wen, HE Shi Cheng and GUO Jin He 南京铁道医科大学江苏苏州

AIM To study the therapeutical effectiveness, dosage range and toxic adverse effects of domestic phosphorus 32 glass microsphere and evaluate its clinical significance. METHODS Ⅰ. Fifty two BALB/*!c tumor bearing male nude mice were allocated into treatment group( n =38) and control group( n =14). In the former group different doses of 32 P GMS were injected into the tumor mass, while in the latter 31 P GMS or no treatment was given. The experimental animals were sacrificed in batches, and then the tumors and their nearby tissues were examined by light and electron microscopy. Ⅱ. Through selective catheterization of hepatic artery, 32 P GMS was infused to 5 healthy domestic pigs in a dosage equivalent to the therapeutic dose for human being, and 31 P GMS was infused to another 5 healthy domestic pigs. Two pigs infused with contrast medium served as whole course blank controls. One pig from each group was surrendered to euthanasia at week 1, 4, 8 and 16 respectively. The ultrastructural histopath ological changes in liver tissues taken from different sites were evaluated semiquan titatively. Ⅲ. One hundred and twenty seven times of 32 P GMS intrahepatic artery interventional therapies were performed on 93 patients with hepatic carcinoma, including 79 cases of primary hepatic carcinoma and 14 cases of secondary hepatic carcinoma. 32 P GMS ( n =30), and group B, 32 P GMS and half dose of trans hepatic artery embolization (TAE) ( n =49) , and 18 patients with HCC by TAE only as control group C. Fourteen patients with secondary hepatic carcinoma were treated in the same way as group B or C. RESULTS Ⅰ. Comparing with the control group, the treatment group of tumor bearing nude mice attained the tumor inhibition rates of 59 7%-93 7% ( F =579 62, P <0 01) at 14*!d . At an absorbed dose of 7320Gy, the tumor cells were completely destroyed. When the absorbed doses ranged from 1830Gy to 3660Gy, most of the tumor cells showed the evidences of injury or necrosis, but there appea

关键词： liver neoplasms/therapy phosphorus 32 glass microspheres ( 32 P GMS) 31 P GMS interventional therapy

SYNTHESIS OF ADENOSINE DERIVATIVES WITH CARBOXYALKYL SIDE CHAIN AT 2',3'OR 5'POSITION

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Chinese Chemical Letters 1993年第12期4卷 1053-1056页

作者： Zeng Li song jun Dong zhang Li He zhang School of Pharmaceutical Sciences,Beijing Medical University,Beijing 100083.

Some nucleoside carhoxylic acid derivatives,such as(±)ethyl ester of griseolic acid (4)and 9-(2'-deoxy-2'-(benzyloxycarbonyl)-methylene-β-D-rihohept-2'-enofuranosyluranate)adenine (11),were *** formation of lactone of 5'-deoxy-adenosineacetic acid(AAA,3)was investigated by using different reagents for lactonization from AAA,but all of the efforts failed, and sone unexpected compounds were obtained.

关键词： DMSO HNMR 亚砜 FAB OR 5’POSITION SYNTHESIS OF ADENOSINE DERIVATIVES WITH CARBOXYALKYL SIDE CHAIN AT 2 AT

Molecular dynamics simulations of helium transport through inorganic mineral nanopores

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Science China Earth Sciences 2025年第1期68卷 237-252页

作者： Dandan song Ping GUAN Chi zhang Jiahao REN School of Earth and Space Sciences Peking University

Helium transport through nanoscale inorganic mineral pores and pore throats is essential for its overall migration. To elucidate helium's transport dynamics within nanopores, we employed equilibrium and non-equilibrium molecular dynamics simulations to investigate helium's static self-diffusion and pressure-driven flow in quartz slit-shaped nanopores. We also introduced water and various gases, including hydrogen, methane, ethane, nitrogen, and carbon dioxide, into the nanopores to assess their influence on helium transport. Our findings indicate minimal helium adsorption on quartz pore surfaces. Under conditions where the pore size is less than 5 nm and the pressure under 10 MPa, environmental factors markedly influence helium diffusion. Large pore sizes, high temperatures, and low gas pressures enhance helium desorption and facilitate faster diffusion. We observed a positive correlation between helium flow velocity and factors such as pore size, pressure gradient, and surface smoothness of the pores. Notably, the presence of pore water and carrier gases in quartz nanopores, which diffuse more slowly than helium, tends to reduce helium surface adsorption and slow its diffusion. Among the carrier gases studied, nitrogen showed similar adsorption capacity, diffusivity, and stability to helium, while carbon dioxide displayed the highest adsorption capacity and the slowest diffusion rate, markedly differing from helium. Based on the simulation results, we concluded that water and carrier gases primarily function as transport mediums in helium migration, moving together with helium. Nitrogen, which shares similar properties with helium, effectively assists in this co-migration process. Conversely, carbon dioxide, due to its high adsorption capacity and slow diffusion, tends to be lost during co-migration. As a result, gas reservoirs with high nitrogen levels and low carbon dioxide levels are more likely to have higher helium concentrations. Additionally, the smaller por

关键词： Helium transport Slit nanopores Molecular dynamics simulations Diffusion Flow carriers

De novo synthesis of atropisomeric benzofurans via Cu/SPDO complex catalyzed asymmetric formal [3 + 2] annulation

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Science China Chemistry 2025年第1期68卷 174-180页

作者： Fan-Xiao Meng Xing-Yu Wang Ka Lu Ju-song Yang Fu-Min zhang Ai-jun Ma Bao Du Yong-Qiang Tu State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University School of Chemistry and Chemical Engineering Shanghai Jiao Tong University School of Biotechnology and Health Sciences Wuyi University

Herein, the de novo synthesis of atropisomeric benzofurans through the Cu/spirocyclic-pyrrolidine-oxazoline(SPDO) complex catalyze asymmetric formal [3 + 2] cycloaddition between quinones and ynamides is explored, producing a range of structurally diverse axially chiral benzofurans in satisfactory yields with good to excellent enantioselectivities. Furthermore, density functional theory calculations were applied to explain the possible reaction mechanism.

关键词： benzofuran atropisomers novel de novo synthetic strategy asymmetric formal [3 + 2] cycladdition Cu/SPDO complex DFT calculations

SUSTAINABLE AGRICULTURE DEVELOPMENT IN SALINE-ALKALI SOIL AREA OF songNEN PLAIN,NORTHEAST CHINA

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Chinese Geographical Science 2003年第2期13卷 171-174页

作者： WANG Zhi-chun, LI Qu-sheng, LI Xiu-jun, song Chang-chun, zhang Guang-xin (Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences, Changchun 130012, P. R. China) Northeast Institute of Geography and Agricultural Ecology Chinese Academy of Sciences Changchun P. R. China

There is great potential for agriculture in saline-alkali soil area in songnen Plain, Northeast China. But the sustainable crop production in this area has been restricted by a few of main factors, such as less precipitation, h igher evaporation and frequent drought, high salinity and alkalinity, high excha ngeable sodium content and poor infiltration of the soil, and insufficiency and low availability in nutrition. It is also considered that there are a few of fav orable conditions for agricultural development in this region, such as sufficien t light and heat resources, rich ground water resources, plenty of manure produc ed by livestock, and so on. At the same time, scientific management and measurem ents have been employed; rational irrigation and drainage system has been establ ished; reclamation, amendment and fertilization of soil, and suitable strategies of cropping practices have been made for the sustainable development of agricul ture. Great progress has been made during 1996-2000.

关键词： sustainable agriculture development saline-alkali soil songnen plain

Structural and microwave absorption properties of CoFe_(2)O_(4)/residual carbon composites

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 221-232页

作者： Yuanchun zhang Shengtao Gao Xingzhao zhang Dacheng Ma Chuanlei Zhu jun He Joint National-Local Engineering Research Centre for Safe and Precise Coal Mining Anhui University of Science and TechnologyHuainan 232001China School of Chemical and Blasting Engineering Anhui University of Science and TechnologyHuainan 232001China

Electromagnetic interference,which necessitates the rapid advancement of substances with exceptional capabilities for bsorbing electromagnetic waves,is of urgent concern in contemporary *** this work,CoFe_(2)O_(4)/residual carbon from coal gasification fine slag(CFO/RC)composites were created using a novel hydrothermal *** mechanisms for microwave absorption,including conductive loss,natural resonance,interfacial dipole polarization,and magnetic flux loss,are involved in these ***,compared with pure residual carbon materials,this composite offers superior capabilities in microwave *** 7.76GHz,the CFO/RC-2 composite achieves an impressive minimum reflection loss(RL_(min))of-43.99 dB with a thickness of 2.44 ***,CFO/RC-3 demonstrates an effective absorption bandwidth(EAB)of up to 4.16 GHz,accompanied by a thickness of *** study revealed the remarkable capability of the composite to diminish electromagnetic waves,providing a new generation method for microwave absorbing materials of superior quality.

关键词： coal gasification slag residual carbon hydrothermal method microwave absorption CoFe_(2)O_(4)