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Better Choice:Linear Long Chains Rather than Branched Ones to Improve Mechanical Performance of Polyethylene through Generating Shish-Kebabs

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Chinese Journal of Polymer Science 2020年第7期38卷 715-729,I0006页

作者： Lu-Feng Deng Xi-Xi Zhang Dong Zhou jian-hua tang Jun Lei Jun-Fang Li Zhong-Ming Li College of Polymer Science and Engineering State Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengdu 610065China College of Chemical Engineering Sichuan UniversityChengdu 610065China State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032China

We utilized two structurally different long chains(linear and branched ultra-high molecular weight polyethylene)to reveal the dependence of flow-induced crystallization on long chain architecture,and prepared two bi-disperse systems of 98 wt%short chain and 2 wt%long chain.A flow field was applied to the bi-disperse polyethylene melt by a modified injection-molding machine,known as oscillation shear injection molding(OSIM).For the first time,the structural influence of long chains on flow-induced shish-kebab formation was systematically *** the intermediate layer of OSIM samples,the branched long chains were better than the linear long chains at inducing shish-kebab formation,agreeing with the reported literatures,because the branches can maintain their oriented conformations *** unexpectedly,the reverse is the case for the core layer of OSIM samples,where the shear flow was much weaker than the intermediate *** understand the unexpected phenomenon,the lifetime of shishes induced by different long chains was *** demonstrated that the linear-induced shishes possessed higher thermal stability than the branched-induced ones so that the linear-induced shishes could survive in the core layer of OSIM ***,unlike other methods for flow-induced crystallization,OSIM could create samples for measuring mechanical properties,and thus offer the chance to reveal the relationship between structure and *** mechanical results demonstrated that both long chains remarkably enhanced the mechanical properties because of the significant promoting effect of long chains and intense flow fields on shish-kebab ***,the linear long chains induced more stable and flawless shishes with higher tensile strength and modulus(80.4 and 1613.5 Mpa,respectively)than the branched ones(74.4 and 1489.3 Mpa).Our research not only helps elucidate the mechanism of shish-kebab formation but also provides a better choice to reinforce

关键词： Polyethylene Crystallization Shear-induced Long chain Short chain

NONLINEAR CURRENT-VOLTAGE CHARACTERISTICS OF CONDUCTIVE POLYETHYLENE COMPOSITES WITH CARBON BLACK FILLED PET MICROFIBRILS

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Chinese Journal of Polymer Science 2013年第2期31卷 211-217页

作者： Qian-ying Chen Jing Gao Kun Dai huan Pang Jia-zhuang Xu jian-hua tang 李忠明 College of Polymer Science and Engineering State Key Laboratory of Polymer Materials EngineeringSichuan University

Current-voltage electrical behavior of in situ microfibrillar carbon black （CB）/poly（ethylene terephthalate）（PET）/polyethylene （PE）（m-CB/PET/PE） composites with various CB concentrations at ambient temperatures was studied under a direct-current electric field. The current-voltage （l-V） curves exhibited nonlinearity beyond a critical value of voltage. The dynamic random resistor network （DRRN） model was adopted to semi-qualitatively explain the nonlinear conduction behavior of m-CB/PET/PE composites. Macroscopic nonlinearity originated from the interfacial interactions between CB/PET micro fibrils and additional conduction channels. Combined with the special conductive networks, an illustration was proposed to interpret the nonlinear 1-V characteristics by a field emission or tunneling mechanism between CB particles in the CB/PET micro fibers intersections.

关键词： Microfibrillar blend Conductive polymer composites PE PET Non-linear current-voltage.

Carbon aerogel microspheres with in-situ mineralized TiO_(2)for efficient microwave absorption

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Nano Research 2022年第8期15卷 7723-7730页

作者： Yue-Yi Wang Jin-Long Zhu Nan Li Jun-Feng Shi jian-hua tang Ding-Xiang Yan Zhong-Ming Li School of Aeronautics and Astronautics Sichuan UniversityChengdu 610065China College of Polymer Science and Engineering State Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengdu 610065China College of Chemical Engineering Sichuan UniversityChengdu 610065China

Carbon aerogels(CAs)have been considered potential microwave absorption(MA)materials because of intrinsic hierarchical porous structure,low density,and excellent heat ***,CAs always required to be ground into micron-scale powder before being used as microwave absorbers,which will inevitably destroy the hierarchical porous ***,reproducing the optimized CAs powders is ***,CAs microspheres with in-situ mineralized TiO_(2)were easily prepared via a sol–gel transition and calcination *** uniform size of CA microspheres and the loaded TiO_(2)on the skeleton of CA yield great microwave attenuation performance while guaranteeing good impedance matching *** obtained TiO_(2)/CA hybrid presented a minimum reflection loss value of−30.2 dB and a broad effective absorption bandwidth(reflection loss below−10 dB)of 6.2 *** low density,MA performance,and controllable particle size make the novel TiO_(2)/CA hybrid promising candidates for MA applications.

关键词： carbon aerogel microsphere cellulose titanium dioxide microwave absorption

Cellular toxicity of isoniazid together with rifampicin and the metabolites of isoniazid on QSG-7701 hepatocytes

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Asian Pacific Journal of Tropical Medicine 2012年第4期5卷 306-309页

作者： Zhi-hua Zhang jian-hua tang Zhi-Lin Zhang Xiu-Long Zhang Hong-Hai Wu Yan-Ning Hou Department of Respiratory Medicine First Affiliated Hospital of Hebei Northern College Department of Clinical Pharmacology First Affiliated Hospital of Hebei Northern College Department of Computed Tomography First Affiliated Hospital of Hebei Northern College Department of Respiratory Medicine.First Affiliated Hospital of Hebei Northern College Department of Pharmacology Bethune International Peace Hospital

Objective:To investigate the cellular toxicity of isoniazid together with rifampicin and the metabolites of isoniazid on cultured QSG-7701 cells ***:Isoniazid,rifampicin, mixture of rifampicin and isoniazid,acetylhydrazine,hydrazine were added in cultural media of QSG-7701 cells and cultured for 48 *** survival rate of cells was determined by MTT *** cultural media and cells were collected and the activity of lactate dehydrogenase was detected by ***:Compared with control group,the survival rate decreased significantly and the lactate dehydrogenase released from cell increased significantly in cells treated with isoniazid,rifampicin,acetylhydrazine,***,the metabolite of isoniazid produced significant damage on hepatocytes in low ***: Rifampicin together with rifampicin and metabolites of isoniazid produce cellular toxic effects and hydrazine may be the most toxiferous metabolite.

关键词： Isoniazid Rifampicin Acetylhydrazine Hydrazine QSG-7701 cell Hepatotoxicity Lactate dehydrogenase

Effect of endostar combined with cisplatin on expression of VEGF and Sema3A of Lewis lung cancer rats

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Asian Pacific Journal of Tropical Medicine 2013年第1期6卷 57-60页

作者： Ping Feng Zhi-Lin Zhang Zhi-hua Zhang Xiu-Long Zhang Feng Xiang jian-hua tang Bao-Li Xiang Master of Respiratory Medicine Hebei Northern College Department of Respiratory Medicine First Affiliated Hospital of Hebei Northern College Department of Clinical Pharmacology First Affiliated Hospital of Hebei Northern College

Objective:To evaluate the therapeutic effect of endostar(ED) combined with cisplatin(DDP) on model of C57BL/6 rats,and to further investigate the inhibiting mechanism of endostar from tumor ***:Lewis lung cancer cells were inoculated in C57BL/6 mouse,then the mouse were randomized into control group(group A),ED(group B),DDP(group C) and ED/DDP (group D).They were treated according to the *** the expressions of VEGF and Sema3A were evaluated by ***:The weight of tumor increased in group A and *** was decreased in group C and *** tumor volume was increased in all the 4 groups. The VEGF expression of group D was obviously lower than the other group 3,but the Sema3A expressed of group D was significantly strengthener than the other group *** VEGF expression of group B and group D were obviously low especially in the 4th-8th *** correlated analysis showed that the expression VEGF and Sema3A were negatively correlated(r=-0.72, P<0.05).Conclusions:ED combined with DDP could control the tumor growth effectively,and avoid weight *** could reduce VEGF expression,and enhance Sema3A *** vessel presents transient *** is easy for DDP perfusion,and to kill tumor cells.

关键词： Lewis lung cancer Endostar DDP VEGF Sema3A

Furazolidone-based triple and quadruple eradication therapy for Helicobacter pylori infection

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World Journal of Gastroenterology 2014年第32期20卷 11415-11421页

作者： Yong Xie Yin Zhu Hong Zhou Zhi-Fa Lu Zhen Yang Xu Shu Xiao-Bai Guo Hui-Zhen Fan jian-hua tang Xue-Ping Zeng jian-Bo Wen Xiao-Qing Li Xing-Xing He Jiu-Hong Ma Dong-Sheng Liu Cai-Bin huang Ning-jian Xu Nong-Rong Wang Nong-hua Lu Department of Gastroenterology The First Affiliated Hospital of Nanchang University Department of Gastroenterology Jiangxi Pro-vincial People’s Hospital Department of Gastroenterology The People’s Hospital of Yichun City Department of Gastroenterology Ganzhou People’s Hospital Department of Gastroenterology The Third Hospital of Nanchang Department of Gastroenterology Pingxiang People’s Hospital Department of Gastroenterology Fengcheng People’s HospitalJiangxi Province Department of Gastroenterology The First Affiliated Hospital of Gannan Medical College Department of Gastroenterology Yingtan City People’s Hospital Department of Gastroenterology The Fourth Affiliated Hospital of Nanchang University

AIM: To evaluate the efficacy of furazolidone-based triple and quadruple therapy in eradicating Helicobacter pylori (H. pylori) in a multi-center randomized controlled trial.

关键词： Helicobacter pylori infection Furazolidone Treatment Eradication

Dispatchable Capability of Aggregated Electric Vehicle Charging in Distribution Systems

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Energy Engineering 2025年第1期122卷 129-152页

作者： ShiqianWang Bo Liu Yuanpeng hua Qiuyan Li Binhua tang jianshu Zhou Yue Xiang Economic and Technology Research Institute State Grid Henan Electric Power CompanyZhengzhou450052China College of Electrical Engineering Sichuan UniversityChengdu610065China

This paper introduces a method for modeling the entire aggregated electric vehicle(EV)charging process and analyzing its dispatchable *** methodology involves developing a model for aggregated EV charging at the charging station level,estimating its physical dispatchable capability,determining its economic dispatchable capability under economic incentives,modeling its participation in the grid,and investigating the effects of different scenarios and EV penetration on the aggregated load dispatch and dispatchable *** results indicate that using economic dispatchable capability reduces charging prices by 9.7%compared to physical dispatchable capability and 9.3%compared to disorderly ***,the peak-to-valley difference is reduced by 64.6%when applying economic dispatchable capability with 20%EV penetration and residential base load,compared to disorderly charging.

关键词： Aggregated charging dispatchable capability peak shaving and valley filling the economics of charging demand response

下颌第二恒磨牙远中舌侧尖间距作为成人喉罩型号选择方法的可行性

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复旦学报（医学版） 2017年第1期44卷 53-57页

作者：陈春欢金建华唐俊张堃复旦大学附属金山医院麻醉科上海201508 复旦大学附属上海市第五人民医院麻醉科上海200240

目的探讨下颌第二恒磨牙远中舌侧尖间距作为成人喉罩型号选择方法的可行性。方法选择使用喉罩行择期手术的患者68例,随机分为两组:标准体重(B组)和下颌第二恒磨牙远中舌侧尖间距(D组),每组34例,根据结果选择相应型号的喉罩。患者予全麻... 详细信息

目的探讨下颌第二恒磨牙远中舌侧尖间距作为成人喉罩型号选择方法的可行性。方法选择使用喉罩行择期手术的患者68例,随机分为两组:标准体重(B组)和下颌第二恒磨牙远中舌侧尖间距(D组),每组34例,根据结果选择相应型号的喉罩。患者予全麻诱导,插入选定型号的喉罩。行喉罩漏气和纤支镜下对位检查,满意后行机械通气。术毕患者清醒后拔除喉罩,观察并记录喉罩上血丝情况。术后随访患者咽喉部并发症情况。结果 D组纤支镜下3和4级的例数(32例)多于B组(26例),差异有统计学意义(P<0.05)。两组中纤支镜下1和2级行正压通气成功8例,失败2例,镜下3和4级行正压通气成功58例,无失败病例,纤支镜下分级与喉罩正压通气成功率之间有明显相关性(P<0.05)。两组中同一患者按两种方法选择的型号不一致时,按B组方法选出的型号纤支镜下1和2级为5例,镜下3和4级为1例;按D组方法选出的型号纤支镜下无1级和2级病例,镜下3和4级为6例;两组差异有统计学意义(P<0.05)。结论根据下颌第二恒磨牙远中舌侧尖间距选择喉罩型号的方法可增加喉罩插入后与声门最佳对合的概率,从而提高喉罩正压通气的成功率,在临床实践中具有可行性。

关键词：喉罩型号标准体重第二恒磨牙远中舌侧尖

The expert system of genotype discrimination for D5S818 locus based on near-infrared spectroscopy-principal discriminant variate

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Journal of Pharmaceutical Analysis 2012年第2期2卷 117-122页

作者： Zai-Zhen Wu a,jian-hua tang a,Bin Zhang a,Li-Ping Guo b,Hong-Ping Xie a,Bing-Ren Gu c a College of Pharmaceutical Sciences,Soochow University,Suzhou 215123,China b College of Chemistry and Chemical Engineering,Chongqing University of Science and Technology,Chongqing 401331,China c Suzhou Institute for Drug Control,Suzhou 215002,China College of Pharmaceutical Sciences Soochow University Suzhou 215123 China. College of Chemistry and Chemical Engineering Chongqing University of Science and Technology Chongqing 401331 China. Suzhou Institute for Drug Control Suzhou 215002 China.

This paper studied the expert system of genotype discrimination for the STR locus D5S818 based on near-infrared spectroscopy-principal discriminant variate (PDV).Six genotypes,*** 10-10,10-11,11-11,11-12,11-13 and 13-13,were selected as research *** on the optimum polymerase chain reaction (PCR) conditions,about 54 measuring samples for each genotype were obtained;these samples were tested by near-infrared spectroscopy *** differences between homozygote genotypes and heterozygote ones,and differences of the total number of core repeat units between the six genotypes,two types of genotyping-tree structure were constructed and their respective PDV models were studied using the near-infrared spectra of the samples as recognition ***,based on the classification ability of these two genotyping-tree structures,an optimum expert system of genotype discrimination was built using the PDV *** result demonstrated that the built expert system had good discriminability and robustness;without any preprocessing for PCR products,the six genotypes studied could be discriminated rapidly and *** provided a methodological support for establishing an expert system of genotype discrimination for all genotypes of locus D5S818 and other STR loci.

关键词： Short tandem repeat Near-infrared spectroscopy Principal discriminant variate Genotyping-tree structure Expert system