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二氧化碳基聚碳酸酯的功能化研究进展

高分子通报 2024年第9期37卷 1222-1232页

作者：赵晨王文珍乔红军刘芸黄庆李鸿玖陕西延长石油(集团)有限责任公司研究院西安710065 西安石油大学化学化工学院西安710065

作为极具发展前景的环境友好型材料,以CO_(2)和环氧丙烷(PO)为原料共聚制得的聚碳酸亚丙酯(PPC)已步入工业化生产,但其尚不理想的热稳定性和力学性能,很大程度上限制了该类材料的应用。另外,随着功能材料在生物学、化学、医学等领域的... 详细信息

作为极具发展前景的环境友好型材料,以CO_(2)和环氧丙烷(PO)为原料共聚制得的聚碳酸亚丙酯(PPC)已步入工业化生产,但其尚不理想的热稳定性和力学性能,很大程度上限制了该类材料的应用。另外,随着功能材料在生物学、化学、医学等领域的应用越来越广泛,人们对聚碳酸酯材料的功能性也提出了要求,对其进行功能化研究也是科学界的一个热点方向。本论文综述了具有荧光、耐紫外线老化功能、阻燃和生物特性等性能的单体作为第三单体,与CO_(2)、PO三元共聚合成功能性聚碳酸酯的研究进展,分析了不同功能性的单体对PPC物化性能及其功能特性的影响,为丰富聚碳酸酯结构和应用领域提供重要参考。

关键词：三元共聚聚碳酸酯功能化二氧化碳转化

Microstructure Evolution of a Ternary Monotectic Alloy During Directional Solidification

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Acta Metallurgica Sinica(English Letters) 2015年第3期28卷 316-321页

作者： Shu Chen jiu-Zhou zhao Hong-Xiang Jiang Jie He Institute of Metal Research Chinese Academy of Sciences

A model was developed to describe the microstracture evolution in a directionally solidified ternary monotectic *** directional solidification experiments were carried out on Al-3Pb-lSn（wt%） alloys by using a Bridgman *** microstracture evolution in the directionally solidified sample was *** numerical results agree well with the experimental *** is demonstrated that the nucleation of the minority phase droplets occur at two different *** corresponds to the liquid-liquid decomposition,which occurs in front of the solidification *** other is at the liquid/solid *** nucleation rate of the minority phase droplets at the liquid/solid interface is significantly higher than at the position in front of the solidification *** characteristic of the nucleation process leads to a bimodal size distribution of the minority particles in the directionally solidified sample.

关键词： Ternary monotectic alloy Directional solidification Modeling

Establishment of an animal model of ischemic type intrahepatic biliary lesion in rabbits

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World Journal of Gastroenterology 2009年第6期15卷 732-736页

作者： Qin-song Sheng da-Zhi Chen Ren Lang Qiang He Yong-jiu Yang zhao-Wei Qu De-Fang zhao Xiao-Sheng Zhang Department of Hepatobiliary and Pancreatosplenic Surgery Beijing Chaoyang Hospital affiliated to the Capital Medical University Beijing 100020 China

AIM:To explore a method to establish an animal model of ischemic type intrahepatic biliary lesion in rabbits. METHODS:Forty Japanese white rabbits of clean grade were divided randomly into four groups(10 rabbits per group)including sham operation(SO) group,and artery-bile obstruction(ABO)-1 h group, ABO-2 h group and ABO-3 h *** the rabbits in this study underwent the same initial surgical procedure in which the liver was prepared as for graft removal during liver *** in the SO group,no additional vascular intervention was performed,while in groups ABO-1 h,ABO-2 h and ABO-3 h,the animals underwent combined clamping of the hepatic artery and common bile duct with microvascular clips for 1,2 and 3 h,*** the scheduled occlusion time,the clip was removed to recover blood *** animals were killed 4 wk after *** survival rate,liver function, cholangiography and histopathological manifestation of the rabbits in each group were observed. RESULTS:The survival rate was 100%in groups SO,ABO-1 h and ABO-2 h,while it was 60%in group ABO-3 *** each observation time,the change degree of the indexes of liver function was proportional to the clamping time(ABO-3 h>ABO-2 h>ABO-1 h> SO,P<0.05).Cholangiographical and histopathologic manifestations both showed that intrahepatic biliary lesion aggravated proportionally with the increase of the clamping time. CONCLUSION:An animal model of ischemic type intrahepatic biliary lesion in rabbits is successfully established,which may provide a reliable technique for basic and clinical research into the etiology, development and prophylaxis of ischemic type intrahepatic biliary lesion after liver transplantation.

关键词： Biliary complication Ischemic type biliary lesion Animal model Liver transplantation Intrahepatic biliary stricture Ischemic reperfusion injury

Development of an ultra-high-pressure rotary combined dynamic seal and experimental study on its sealing performance in deep energy mining conditions

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Petroleum Science 2022年第3期19卷 1305-1321页

作者： Wei Huang Gan Feng Hui-Lan He Jian-Zhong Chen jiu-Quan Wang zhao zhao Key Laboratory of Deep Earth Science and Engineering(Sichuan University) Ministry of EducationSichuan UniversityChengdu610065SichuanChina School of Mechanical Engineering Sichuan UniversityChengdu610065SichuanChina College of Water Resource&Hydropower Sichuan UniversityChengdu610065SichuanChina Jin Shi Drill Tech Co. LtdTangshan063004HebeiChina Pingdingshan Tianan Coal Mining Co. LTD.Pingdingshan467000HenanChina Xi'an Research Institute China Coal Technology&Engineering Group CorpXi'an710077ShaanxiChina

With the continuous development of deep oil and gas,minerals,geothermal resources,and other resources,there are increasingly more stringent requirements for *** particular,the ultra-highpressure dynamic seals of deep mining device need to be ***,considering the use of dynamic seals in unique deep mining environments,an ultra-high-pressure rotating combined dynamic seal was designed and developed and its sealing performance was experimentally measured and *** results show that the experimental device can operate stably under a pressure of up to150 MPa and a rotating speed of 76 r/min,and can also operate normally under a rotating speed of up to 140 r/min and a sealing pressure of 120 *** the operation of the ultra-high-pressure rotating combined dynamic seal,the sealing ring does not show obvious damage,which vouches for its sealing *** leakage of flow and pressure was detected in the all seal structures within the sealing pressure range of 0-150 ***,the dynamic sealing performance of the device is intact under ultra-high-pressure conditions and can be applied in deep mining environments at a certain *** research and development of this device can aid future deep energy exploration and exploitation.

关键词： Deep energy exploitation Ultra-high-pressure Rotating combination dynamic seal Development of test equipment

Effect Mechanism of a Direct Current on the Solidification of Immiscible Alloys

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Chinese Physics Letters 2012年第8期29卷 265-268页

作者： JIANG Hong-Xiang zhao jiu-Zhou Institute of Metal Research Chinese Academy of SciencesShenyang 110016

Continuous solidification experiments are carried out with Al-Pb alloys under the effect of a direct *** microstructure evolution in the samples is *** numerical results obtained indicate that a direct current has great effects on the solidification of immiscible *** mainly affects the microstructure evolution during a liquid-liquid decomposition by changing the spatial motions of the minority phase droplets and the temperature field in front of the solidification interface.A sample with either a well dispersed or a core/shell microstructure can be obtained by solidifying Al-Pb alloys under the effect of properly selected direct currents.

关键词： solidification microstructure alloys

基于KASP平台的转基因纯合体高通量检测方法的建立

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玉米科学 2024年第8期32卷 31-37页

作者：孙铭勖葛建镕朱维佳王蕊赵怡锟金肇阳赵紫薇朱少喜赵久然王凤格吉林农业大学农学院长春130118 北京市农林科学院玉米研究所/玉米DNA指纹及分子育种北京市重点实验室北京100097 扬州大学农学院江苏扬州225009 黑龙江大学现代农业与生态环境学院哈尔滨150008

以转基因玉米DBN9501为材料,设计一套包含1条位于基因组的共用引物、两条分别位于外源插入序列与外源插入序列等位基因组序列的竞争性引物,能分别扩增出外源片段与基因组片段的纯合体检测引物,建立一种基于KASP平台的高通量转基因玉米... 详细信息

以转基因玉米DBN9501为材料,设计一套包含1条位于基因组的共用引物、两条分别位于外源插入序列与外源插入序列等位基因组序列的竞争性引物,能分别扩增出外源片段与基因组片段的纯合体检测引物,建立一种基于KASP平台的高通量转基因玉米纯合体检测方法。利用DBN9501BC1和15份其他转基因玉米样品进行引物评估、体系优化以及特异性验证。结果显示,所设计的引物既能特异性地对DBN9501进行成分检测,又能对DBN9501BC1代中的纯合阳性、杂合阳性以及阴性3种基因型进行准确鉴别。

关键词：转基因玉米纯合体检测高通量 KASP平台分子标记

Mathematical Model and Its Hybrid Dynamic Mechanism in Intelligent Control of Ironmaking

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Journal of Iron and Steel Research International 2007年第1期14卷 7-11页

作者： LIU Xiang-guan ZENG jiu-sun zhao Min College of Science Zhejiang University Hangzhou 310027 Zhejiang China

A hybrid dynamic model was proposed, which considered both the hydrokinetic and the chaotic properties of the blast furnace ironmaking process; and great emphasis was put on its mechanism. The new model took the high complexity of the blast furnace as well as the effects of main parameters of the model into account, and the predicted results were in very good agreement with actual data.

关键词： blast furnace ironmaking hybrid dynamics intelligent control mathematical model chaotic control

Indocyanine green clearance test and model for end-stage liver disease score of patients with liver cirrhosis

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Hepatobiliary & Pancreatic Diseases International 2009年第1期8卷 46-49页

作者： Sheng, Qin-Song Lang, Ren He, Qiang Yang, Yong-jiu zhao, De-Fang Chen, da-Zhi Capital Med Univ Beijing Chaoyang Hosp Dept Hepatobiliary & Pancreatosplen Surg Beijing 100020 Peoples R China

BACKGROUND: The indocyanine green (ICG) clearance test (clearance rate (K) and retention rate at 15 minutes (R(15))) is a sensitive indicator to evaluate liver function. The model for end-stage liver disease (MELD) score has emerged as a useful tool for estimating the mortality of patients awaiting liver transplantation and has recently been validated on patients with liver diseases of various etiologies and severity. In this study, we investigated the correlation between the ICG clearance test and MELD score of patients with liver cirrhosis. METHODS: From June 2007 to March 2008, 52 patients with liver cirrhosis admitted to our center were classified into Child-Pugh class A (8 patients), B (14) and C (30). The ICG clearance test (K value and R(15)) was performed by ICG pulse spectrophotometry (DDG-3300K), and the MELD scores of patients were calculated. RESULTS: As the Child-Pugh classification of liver function gradually deteriorated, the K value decreased, while R(15) and MELD score increased. There were significant statistical differences in K value, R(15) and MELD score in patients with different Child-Pugh classifications. Significant correlations were found between the parameters of the ICG clearance test (K value and R(15)) and MELD score. A negative correlation was observed between K value and MELD score (r=-0.892, P < 0.05), while a positive correlation was observed between R(15) and MELD score (r=0.804, P < 0.05). CONCLUSIONS: The ICG clearance test and MELD score are good parameters for evaluating liver function. Moreover, K value and R(15) have significant correlations with MELD score, especially the K value, which may be a convenient and appropriate indicator to evaluate liver function of patients with liver cirrhosis.

关键词： liver function tests indocyanine green model for end-stage liver disease spectrophotometry

Local non-equilibrium thermal fluctuation,internal noise and dissipation in gaseous heat conduction systems with high values of Prandtl number

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Chinese Chemical Letters 2011年第5期22卷 626-630页

作者： Feng Lin jiu Li Luo Nan Rong zhao Institute of Chemical Physics College of Chemistry. Sichuan Universitry Chengdu 610064 China

By means of a stochastic model suggested in this paper for the systems with local non-equilibrium excited thermal fluctuations, the famous Shannon entropy is extended to include the heat conduction processes controlled externally by boundary constraints of constant temperature gradients at two ***,using the description of master equation for the continuous Markov processes a balance equation of stochastic entropy production valid for one dimension gaseous heat conduction systems with high values of Prandtl number has been also *** on it,a general expression for both the stochastic entropy production and the entropy production of fluctuations have been further deduced by theΩ-*** this formalism,all kinds of stochastic contributions to the dissipation from the non-equilibrium thermal fluctuation and internal noise turn explicit.

关键词： Stochastic model of gaseous heat conduction Master equation of continuous stochastic processes Local non-equilibrium thermal fluctuation dissipation Entropy production of fluctuations