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ESR　Studies　of　Free　Radicals　in　Wheat　Embryos　Following　Medium　Energy　Nitrogen　Ion　Exposure

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IMP & HIRFL Annual Report 1994年 72-73页

作者： li wenjian Wei Zengquan Xie Hongmei dang Bingrong li Qiang and Han Guangwu

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关键词： Medium Wheat Energy Exposure Following Free Ion ESR Nitrogen Radicals

Analysis of products of thymine irradiated by ^(18)O^(8+) ion beam in N_2O saturated aqueous solution

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Nuclear Science and Techniques 1999年第3期10卷 180-183页

作者： CAI Xichen WEI Zengquan li wenjian liANG Jianping li Qiang (Institute of Modern Physics, the Chinese Academy of Sciences, Lanzhou 730000) Institute of Modern Physics Chinese Academy of sciences Lanzhou 730000 China

Some methods of capillary gas chromatography, such as GC, GC-MS,GC-FT-IR, are used to analyze the products of thymine irradiated by 18O8+ ion beam in N2O saturated aqueous solution. From the results of GC-MS the molecular weight of products can be determined, and from the results of GC-FT-IR some molecular structure information of products can be obtained. By this way the products,5,6-Dihydrothyndne, 5-Hydroxyl-5-Methylhydantoin, 5-Hydroxyl-6-Hydrothymine, 5-Hydro-6-Hydroxylthymine, 5-Hydroxymethyluracil, Trans-Thymine glycol, Cis-Thymine glycol and dimers are determined without separation of them from samples. Though these products are as same as those products of thymine irradiated by γ rays in N2O saturated aqueous solution, the mechanism of thymine irradiated by heavy ion beam in aqueous solution is different from that by γ rays. The main products of thymine irradiated by 18O8+ ion beam in N2O saturated aqueous solution are hydroxyl adducts at 5-6 band of thymine, while the main products of thymine irradiated by γ ray in N2O saturated aqueous solution are dimers of thymine.

关键词： ^18O^8+离子束辐照胸腺碱 N2O饱和水溶液

Surface dealuminated Beta zeolites supported WO3 catalyst and its catalytic performance in tetralin hydrocracking

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Petroleum Science 2022年第6期19卷 3116-3123页

作者： Yan-Ting Zhang Ni-Ni Zhang Sheng-li Chen Hui dang Tao Wu State Key Laboratory of Heavy Oil Processing College of Chemical EngineeringChina University of Petroleum-BeijingBeijing 102249China

In this study,selective dealumination of Beta zeolites was performed through partially removing the templating agent in Beta zeolites by calcination and then removing the aluminum on the external surface of Beta zeolites with acid *** catalysts were prepared by loading WO_(3)onto these dealuminated Beta *** was shown that the surface SiO_(2)/Al_(2)O_(3)of selectively dealuminated Beta zeolites was higher than that of conventionally dealuminated samples for the same bulk SiO_(2)/Al_(2)O_(3),and the hydrogenation activity of the catalyst of the selectively dealuminated Beta zeolites was lower than that of conventionally dealuminated Beta *** experimental results for tetralin hydrocracking to BTX showed that the catalysts based on the selectively dealuminated Beta zeolites had higher BTX selectivity and lower coke formation rate than that the catalysts based on the conventionally dealuminated Beta zeolites.

关键词： Beta zeolites Dealumination Calcination Hydrocracking

G2-Chromosome fragments after irradiation with Carbon ions

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生物物理学报 2009年第S1期25卷 480-481页

作者： Wang Zhuanzi, li wenjian, Wei Wei, Jing Xigang, dang bingrong, liu jinting Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, Gansu Nanchang road 509

Measurements of chromosome aberrations in peripheral blood lymphocytes are currently the most sensitive and reliable indicator of radiation exposure that can be used for

关键词： Carbon ions G2-Chromosome fragments PCC technique

Effect of Annealing on Microstructure and Mechanical Properties of Ultrafine-Grained Low-Carbon Medium-Manganese Steel Produced by Heavy Warm Rolling

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Acta Metallurgica Sinica(English Letters) 2019年第3期32卷 361-371页

作者： Sohail Ahmad li-Feng Lv li-Ming Fu Huan-Rong Wang Wei Wang Ai-dang Shan School of Materials Science and Engineering Shanghai Jiao Tong University Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration(CISSE) Baosteel Research Institute

An ultrafine-grained(UFG) low-carbon medium-manganese steel was fabricated by the heavily warm rolling(HWR) and subsequent quenching, and the effects of annealing temperatures on microstructure and mechanical properties of the UFG HWRed steel were investigated. The results show that the HWRed steel exhibits simultaneous improvements in strength,uniform elongation and work hardening, which is mainly attributed to the refinement of martensitic microstructures. The HWRed steels comprise only a-phase when annealing at lower temperatures below to 550 °C and at higher temperatures above to 700 °C. Whereas, UFG c-austenite is formed by reverse transformation when the HWRed steel was annealed at intermediate temperatures from 550 to 700 °C and the volume fraction increases with increasing annealing temperatures,consequently resulting in a dramatic increase in ductility of the annealed HWRed steels. It was found that the transformed UFG austenite and ferrite remained ～500 nm and ～800 nm in size when the HWRed steel was annealed at 650 and700 °C for 1 h, respectively, showing an excellent thermal stability. Moreover, the HWRed steel annealed at 650 °C exhibits high strength-ductility combinations with a yield strength of 906 MPa, ultimate tensile strength(UTS) of1011 MPa, total elongation(TEL) of 51% and product of strength and elongation(PSE: UTS 9 TEL) of 52 GPa%. It is believed that these excellent comprehensive mechanical properties are closely associated with the UFG austenite formation by reverse transformation and principally attributed to the transformation-induced plasticity(TRIP) effect.

关键词： Ultrafine-grained medium-Mn steel Heavy warm rolling Annealing Microstructure and properties Transformation-induced plasticity(TRIP) effect

Successful occluding by absorbable sutures for epicardial collateral branch perforation

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Journal of Geriatric Cardiology 2018年第10期15卷 653-656页

作者： li SHENG Yong-Tai GONG dang-Hui SUN Yue li Department of Cardiovascular the First Affiliated Hospital of Harbin Medical UniversityHarbinChina

In order to improve the success rate of chronic total occlusion (CTO)percutaneous coronary intervention (PCI), retrograde approach has been attracted more *** study reported the collateral perforation rate was 6.9% in retrograde CTO PCI.[1,2] Collateral related perforations were higher in patients with the epicardial collateral than that with the septal collateral.[3]Several techniques have been developed to deal with the collateral branch ***,we described the treatment of epicardial collateral branch perforation by absorbable suture segments embolization through microcatheter during retrograde CTO PCI.

关键词： Epicardial collateral branch perforation Occluding by absorbable sutures Percutaneous coronary intervention

Development of a prognostic scoring system for hepatic vena cava Budd-Chiari syndrome with hepatocellular carcinoma

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Hepatobiliary & Pancreatic Diseases International 2024年第4期23卷 370-375页

作者： Sheng-Yan liu Lu-Hao li Zhao-Chen liu Su-Xin li Xiao-Wei dang Department of Hepatopancreatobiliary Surgery the First Affiliated Hospital of Zhengzhou UniversityZhengzhou 450052China Budd-Chiari Syndrome Diagnosis and Treatment Center of Henan Province Zhengzhou 450052China

Background:Hepatocellular carcinoma(HCC)is a serious complication of hepatic vena cava Budd-Chiari syndrome(HVC-BCS)that significantly reduces the survival time of *** study aimed to analyze the prognostic factors influencing the survival of HVC-BCS patients with HCC and to develop a prognostic scoring ***:The clinical and follow-up data of 64 HVC-BCS patients with HCC who received invasive treatment at the First Affiliated Hospital of Zhengzhou University between January 2015 and December 2019 were retrospectively ***-Meier curves and log-rank tests were used to analyze the survival curve of patients and the difference in prognoses between the *** and multivariate Cox regression analyses were performed to analyze the influence of biochemical,tumor,and etiological characteristics on the total survival time of patients,and a new prognostic scoring system was developed according to the regression coefficients of the independent predictors in the statistical *** prediction efficiency was evaluated using the time-dependent receiver operating characteristics curve and concordance ***:Multivariate analysis showed that serum albumin level7 cm(HR=8.623,95%CI:3.771-19.715,Plinical evaluation of patient prognosis.

关键词： Budd-Chiari syndrome Hepatocellular carcinoma Prognostic factors Inferior vena cava stenosis Prognostic scoring system

Platelet-mediated adhesion facilitates leukocyte sequestration in hypoxia-reoxygenated microvessels

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Science China(life Sciences) 2016年第3期59卷 299-311页

作者： Senfeng Zheng Yanting Cao wenjian Zhang Honglin liu Jia You Yiqing Yin Jinning Lou Chenghui li Department of Anesthesiology China-Japan Friendship Hospital Institute of Clinical Medical Science China-Japan Friendship Hospital

Leukocyte transendothelial migration and sequestration are two distinct outcomes following leukocyte adhesion to endotheli- um during ischemia-reperfusion injury, in which platelets may play a pivotal role. In the present study, we established an in vitro hypoxia-reoxygenation model to mimic ischemia-reperfusion injury and found platelet pre-incubation significantly in- creased leukocyte adhesion to endothelial cells after hyoxia-reoxygenation （over 67%）. Blockade of endothelial-cell-expressed adhesion molecules inhibited leukocyte direct adhesion to endothelial cells, while platelet-mediated leukocyte adhesion was suppressed by blockade of platelet-expressed adhesion molecules. Further experiments revealed platelets acted as a bridge to mediate leukocyte adhesion, and platelet-mediated adhesion was the predominant pattern in the presence of platelets. However, platelet pre-incubation significantly suppressed leukocyte transendothelial migration after hypoxia-reoxygenation （over 31%）, which could be aggravated by blockade of endothelial-cell-expressed adhesion molecules, but alleviated by blockade of plate- let-expressed adhesion molecules. This would indicate that platelet-mediated adhesion disrupted leukocyte transendothelial migration. An in vivo meseuteric ischemia-reperfusion model demonstrated leukocyte transfusion alone caused mild leukocyte adhesion to reperfused vessels and subsequent leukocyte infiltration, while simultaneous leukocyte and platelet transfusion led to massive leukocyte adhesion and sequestration within reperfused microvessels. Our studies revealed platelets enhanced leu- kocyte adhesion to endothelial cells, but suppressed leukocyte transendothelial migration. Overall, this leads to leukocyte se- questration in hypoxia-reoxygenated microvessels.

关键词： adhesion endothelial cells hypoxia-reoxygenation leukocytes platelets transendothelial migration

Key to the fungus-feeder Phlaeothripinae species from China(Thysanoptera: Phlaeothripidae)

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Zoological Systematics 2014年第3期39卷 313-358页

作者： li-Hong dang Ge-Xia Qiao Key Laboratory of Zoological Systematics and Evolution Institute of Zoology Chinese Academy of Sciences Bio-resources Key Laboratory of Shaanxi Province School of Biological Sciences & Engineering Shaanxi University of Technology

In China, 31 genera and 95 species of fungivorous Phlaeothripinae are recorded here, of which 7 species are newly recorded and illustrated. An illustrated identification key to the 94 species is also provided, togethe... 详细信息

关键词： Key Phlaeothripinae fungus-feeder China.