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Hydrogen Bonding in Thermoplastic Polyurethane Elastomers:IR Thermal Analysis

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Chemical Research in Chinese Universities 2002年第1期18卷 84-87页

作者： CHEN Da-jun li yao-jun State Key Laboratory of Fiber Materials Modification Donghua UniversityShanghai 200051P.R.China

The hydrogen bond percentage and its temperature dependence of the three TPU samples synthesized from polytetrahydrofuran, 4,4'-diphenylmethane diisocyanate, N -methyl diethanol amine or 1,4-butane diol were studied by means of IR thermal analysis. The enthalpy and the entropy of the hydrogen bond dissociation were determined by the Van't Hoff plot.

关键词： Thermoplastic polyurethane elastomers IR thermal analysis Hydrogen Bond effect

Regional differences in global glacier retreat from 1980 to 2015

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Advances in Climate Change Research 2019年第4期10卷 203-213页

作者： li yao-jun DING Yong-Jian SHANGGUAN Dong-Hui WANG Rong-jun State Key Laboratory of Cryospheric Science Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou730000China Key Laboratory of Ecohydrology of Inland River Basin Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou730000China University of Chinese Academy of Sciences Beijing100049China

Global warming triggers shrinking and thinning of glaciers worldwide,with potentially severe implications for human ***,regional differences in glacier retreat and its relationship with climatic characteristics have not been conclusively *** this study,regional changes in global glaciers based on two primary features,area change and mass balance,were investigated on the basis of data collected from published research on glacier *** show that during the period 1980—2015,the rate of global glacier area shrinkage was 0.18%per year and that of global glacier mass loss was 0.25 m *** *** of glaciers located at low and middle latitudes was characterized by severe area shrinkage and mass ***,in the Arctic,deglaciation was characterized by ice thinning due to a low area reduction but relatively high mass loss ***,glaciers in high southern latitudes were in a relatively stable *** Mountain Asia exhibited the lowest rate of area shrinkage and mass loss among glaciers located at low and middle latitudes,and a slower rate of mass loss compared with the global *** in the Tropical Andes exhibited the fastest rate of glacier area shrinkage(—1.6%per year),whereas Antarctic and Subantarctic glaciers showed the lowest rate(—0.11%per year).For mass balance,the most negative occurred at Southern Andes(—0.81 m *** year),followed by Alaska(-0.74 m *** year).Only the Antarctic and Subantarctic experienced small mass gain(0.04 m *** year).High levels of correlation are found between the rates of glacier retreat and annual average temperature and annual total precipitation instead of their *** variability of the surface climate conditions in the glacier environment plays a key role in driving these regional differences in global glacier retreat.

关键词： Glacier retreat Regional differences Climate change

CFD SIMULATION OF 3D FLOW IN LARGE-BORE AXIAL-FLOW PUMP WITH HALF-ELBOW SUCTION SUMP

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Journal of Hydrodynamics 2006年第2期18卷 243-247页

作者： WANG Fu-jun li yao-jun CONG Guo-hui WANG Wen-e WANG Hai-song College of Water Conservancy and Civil Engineering China Agricultural University Beijing 100083 China

Numerical simulations of 3D turbulent flow in a large-bore axial-flow pump coupled with half-elbow suction sump were perlbrmed by using CFD approach. The numerical model and velocity and pressure distributions in entire flow passage were presented. The obvious backflow in half-elbow suction sump and strong flow nonuniformity at suction sump outlet were observed, whereas these phenomena were not observed in existing studies performed for a separate suction sump by either experimental or numerical approach. This result indicates that the interaction between half-elbow suction sump and impeller has significant effect on the flow distribution in the pump passage. The change of pump efficiency caused by the interaction was discussed,

关键词： axial flow pump half elbow suction sump,CFD

Pseudothrombus deposition accompanied with minimal change nephrotic syndrome and chronic kidney disease in a patient with Waldenstrom’s macroglobulinemia: A case report

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World Journal of Clinical Cases 2019年第16期7卷 2393-2400页

作者： Mercy Julian Mwamunyi Hong-Yan Zhu Chun Zhang Ya-Pei Yuan li-jun yao Department of Nephrology Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430022China Department of Hematology Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430022China

BACKGROUND Waldenstr?m’s macroglobulinemia(WM) is a rare lymphoid neoplasia, which can have renal complications. These rarely occur, and most common renal manifestations are mild proteinuria and microscopic hematuria. Herein we describe a case of WM that presented with pseudothrombi depositing in capillaries associated with minimal change nephrotic syndrome and chronic kidney disease(CKD).CASE SUMMARY A 52-year-old man presented with features suggesting nephrotic *** workups were done, and there were elevated serum levels of interleukin-6 and vascular endothelial growth factor(VEGF), capillary pseudothrombus accumulation associated with minimal change nephrotic syndrome, CKD, and WM. Treatment was directed at the patient’s WM with bortezomib, thalidomide, and dexamethasone whereby serum immunoglobulin M(IgM) decreased. The damage of IgM on the kidney was corrected; thus, the patient’s proteinuria and serum creatinine had improved. The patient is still under clinical *** It is essential for clinicians to promptly pay more attention to patients presenting with features of nephrotic syndrome and do extensive workups to come up with a proper therapy strategy.

关键词： Waldenstrom’s macroglobulinemia Pseudothrombi Nephrotic syndrome Chronic kidney disease Case report

TOPK Activation Exerts Protective Effects on Cisplatin-induced Acute Kidney Injury

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Current Medical Science 2022年第4期42卷 742-753页

作者： Hui ZHANG Qing-qing DONG Hua-pan SHU Yu-chi TU Qian-qian liAO li-jun yao Department of Nephrology Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430022China

Objective:T-LAK-cell-originated protein kinase(TOPK),a PSD95-Disc large-ZO1(PDZ)binding kinase(PBK),is a novel member of the mitogen-activated protein kinase(MAPK)*** have shown that TOPK plays a critical role in the function of tumor cells,including apoptosis and ***,little is known on the effect of TOPK in cisplatin-induced acute kidney injury(CP-AKI).This study aimed to investigate the role and mechanism of TOPK in ***:Cisplatin was administered to C57BL/6 mice and cultured kidney tubular epithelial cells(TECs)to establish the CP-AKI murine or cellular *** were then stimulated with the specific inhibitor of TOPK OTS514 or transfected with the recombinant-activated plasmid TOPK-T9E to inhibit or activate *** TECs were treated with AKT inhibitorⅧfollowing stimulation with OTS514 or *** blotting and flow cytometry were used to evaluate the cell cycle and apoptosis of ***:The analysis revealed that the TOPK activity was significantly suppressed by cisplatin,both in vivo and in ***,the pharmacological inhibition of TOPK by OTS514,a specific inhibitor of TOPK,exacerbated the cisplatin-induced cell cycle arrest in the G2/M phase and apoptosis of cultured ***,the TOPK activation via the TOPK-T9E plasmid transfection could partially reverse the cell cycle arrest at the G2/M phase and apoptosis of cisplatin-treated *** addition,AKT/protein kinase B(PKB),as a TOPK target protein,was inhibited by cisplatin in cultured *** pharmaceutical inhibition of AKT further aggravated the apoptosis of TECs induced by cisplatin or TOPK *** systematically mediated the apoptosis via the AKT pathway in the CP-AKI cell ***:These results indicate that TOPK activation protects against CP-AKI by ameliorating the G2/M cell cycle arrest and cell apoptosis.

关键词： acute kidney injury cisplatin cell cycle apoptosis T-LAK-cell-originated protein kinase/PSD95-Disc large-ZO1 binding kinase

热塑性聚氨酯弹性体中的氢键作用──动态力学分析

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高等学校化学学报 2001年第5期22卷 844-846页

作者：陈大俊李瑶君中国纺织大学纤维材料改性国家重点实验室上海200051

采用动态力学分析方法研究了一系列由聚四氢呋喃 (Mn=2 0 0 0 )、 4 ,4 -二苯基甲烷二异氰酸酯以及N-甲基二乙醇胺、 1 ,4 -丁二醇和 1 ,2 -丙二胺三种不同的扩链剂合成的 TPU中的氢键作用 .发现这种氢键作用符合 Arrhenius型的温度依... 详细信息

采用动态力学分析方法研究了一系列由聚四氢呋喃 (Mn=2 0 0 0 )、 4 ,4 -二苯基甲烷二异氰酸酯以及N-甲基二乙醇胺、 1 ,4 -丁二醇和 1 ,2 -丙二胺三种不同的扩链剂合成的 TPU中的氢键作用 .发现这种氢键作用符合 Arrhenius型的温度依赖性 .从弹性模量

关键词：热塑性聚氨酯弹性体氢键作用物理交联温度依赖性动态力学分析

Mechanical and Frost-resistance Properties of Rural Area Building Waste Hollow Bricks

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Journal of Wuhan University of Technology(Materials Science) 2010年第6期25卷 1017-1021页

作者：刘军 School of Material Science and Engineering Shenyang Jianzhu University

Serving as recycled coarse aggregate,the pretreated rural building waste was added into the concrete hollow bricks in the varying replacement of 0,20%,40%,60%,80% and 100%.By testing its compressive strength,flexural strength,mass and strength loss after freeze-thaw cycles,the impact of the different replacement on mechanical and frost-resistance properties of concrete hollow bricks was presented through SEM *** experimental results show that,with the increase in recycled coarse aggregate replacement rate,the mechanical and frost-resistance properties show a downward trend;when the replacement rate is 40%,28 d compressive strength and flexural strength of concrete hollow brick demonstrate the good peak value which meet the requirement of the national standard for ordinary small concrete hollow bricks;the interfacial structures of the pretreated recycled concrete is more complicated than those of concrete made of natural aggregate,but the former enjoys better interface bonding and tight structure.

关键词： replacement rate waste clay brick mechanical properties frost-resistance properties microstructure

Short-term efficacy of microwave ablation in the treatment of liver cancer and its effect on immune function

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World Journal of Clinical Cases 2024年第18期12卷 3395-3402页

作者： li-jun yao Xiao-Ding Zhu liu-Min Zhou li-li Zhang Na-Na liu Min Chen Jia-Ying Wang Shao-jun Hu Department of Oncology Suzhou Ninth People's HospitalSuzhou 215200Jiangsu ProvinceChina Department of Rehabilitation Suzhou Xiangcheng District Rehabilitation HospitalSuzhou 215132Jiangsu ProvinceChina

BACKGROUND Hepatectomy is the first choice for treating liver ***,inflammatory factors,released in response to pain stimulation,may suppress perioperative immune function and affect the prognosis of patients undergoing *** To determine the short-term efficacy of microwave ablation in the treatment of liver cancer and its effect on immune *** Clinical data from patients with liver cancer admitted to Suzhou Ninth People’s Hospital from January 2020 to December 2023 were retrospectively ***-five patients underwent laparoscopic hepatectomy for liver cancer(liver cancer resection group)and 35 patients underwent medical image-guided microwave ablation(liver cancer ablation group).The short-term efficacy,complications,liver function,and immune function indices before and after treatment were compared between the two *** One month after treatment,19 patients experienced complete remission(CR),8 patients experienced partial remission(PR),6 patients experienced stable disease(SD),and 2 patients experienced disease progression(PD)in the liver cancer resection *** the liver cancer ablation group,21 patients experienced CR,9 patients experienced PR,3 patients experienced SD,and 2 patients experienced *** significant differences in efficacy and complications were detected between the liver cancer ablation and liver cancer resection groups(P>0.05).After treatment,total bilirubin(41.24±7.35 vs 49.18±8.64μmol/L,Pliver cancer ablation and liver cancer resection *** The short-term efficacy and safety of microwave ablation and laparoscopic surgery for the treatment of liver cancer are similar,but liver function recovers quickly after microwave ablation,and microwave ablation

关键词： Microwave ablation liver cancer Short-term efficacy liver function Immunologic function

INFLUENCE OF VOCl2-ADDITIVE IN Rh CATALYST ON CO HYDROGENATION

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Journal of Energy Chemistry 1995年第1期 52-58页

作者： ZHOU Jian-Lue li jun CHEN yao-QiangGONG Mao-Chu CHEN YuDepartment, of Chemistry caul Analytical & Testing Center Sichuan University Chengdu, Sichuan 610061

The influence of VOCl2 additive in the supported Rh catalysts derived from both Rh2 (CO )4 Cl2 and RhCl3 on CO hydrogenation was investigated. The VOCl2 additive as a promoter can effectively enhance the CO conversion and catalytic selectivity to ethanol. This effect is caused by the interaction of Rh with vanadium promoter. It is found that the Rh centers on which the gem- adsorbed CO could be formed are main active sites. The Rh2(CO)4Cl2 complex is better than the RhCl3 salt as the precursor of the Rh catalyst for the CO hydrogenation to ethanol.

关键词： CO hydrogenation ethanol Rh catalyst vanadium promoter