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聚甲基乙撑碳酸酯/氧化石墨烯纳米复合材料的制备及性能研究

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化学研究与应用 2017年第5期29卷 642-647页

作者：蒋果赵楠张水洞黄汉雄华南理工大学机械与汽车工程学院工业装备与控制工程系广东广州510640

本文采用改进Hummers法制备氧化石墨烯(GO),通过原子力显微镜对GO片层形貌进行表征;以聚甲基乙撑碳酸酯(PPC)、聚乙烯醇(PVA)和氧化石墨烯(GO)为原料,采用溶液和熔融共混法相结合,制备PPC/PVA/GO纳米复合材料,研究其力学性能、热学性能... 详细信息

本文采用改进Hummers法制备氧化石墨烯(GO),通过原子力显微镜对GO片层形貌进行表征;以聚甲基乙撑碳酸酯(PPC)、聚乙烯醇(PVA)和氧化石墨烯(GO)为原料,采用溶液和熔融共混法相结合,制备PPC/PVA/GO纳米复合材料,研究其力学性能、热学性能和动态流变行为。结果表明,当GO含量为0.5 wt%时,拉伸强度达到了22.03 MPa,与纯PPC相比提高了25.8%;当GO含量增大到1.0 wt%时,拉伸强度开始降低;断裂伸长率随GO的加入呈现降低的趋势。GO含量为1.0%时复合材料的热学性能最好,与纯PPC相比,复合材料的完全热分解温度从350℃提高到了400℃以上,并且热分解速率下降了12%/min;复合材料的复数黏度、储能模量和损耗模量随PVA及GO的引入也有一定程度的提高。

关键词：聚甲基乙撑碳酸酯聚乙烯醇氧化石墨烯力学性能热性能流变行为

Benchmarking of Evaluated Neutron Data for Large Polythene Sample

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Benchmarking of Evaluated Neutron Data for Large Polythene S...

作者： NIE Yang-bo RUAN Xi-chao BAO Jie huang han-xiong ZHONG Qi-ping LI Xia ZHOU Bin MA Zhong-yuan ZhanG Ya-ling ZHOU Zu-ying

Since Polythene(CH) is only composed of carbon and hydrogen nuclides,it is an ideal neutron slowing-down *** is also a good material for verifying a neutron benchmark experiment,not only for the neutron transport code but also the experiment instrument system,by measuring the leakage spectrum of neutron transmission through a large polythene sample,because the neutron cross-sections for hydrogen and carbon are well *** 14.8 MeV neutrons were produced by the T(d,n) He reaction using the 300 keV D beam accelerated by the Cockcroft-Walton accelerator,the neutron leakage spectra

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微注塑制品微结构重复性影响因素的研究进展

轻工机械 2010年第2期28卷 1-4,13页

作者：谭宇黄汉雄华南理工大学机械与汽车工程学院广东广州510640 华南理工大学塑料橡胶装备及智能化研究中心广东广州510640

从工艺参数、成型模具、成型材料3方面的影响综述了微注塑制品微结构重复性的研究进展,并对未来的研究方向进行了展望。工艺参数方面侧重于熔体温度、模具温度和注射速度等,成型模具方面则集中在模具结构和模腔粗糙度。

关键词：塑料工业微注塑工艺参数成型模具材料

Liver transplantation following two conversions in a patient with huge hepatocellular carcinoma and portal vein invasion:A case report

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World Journal of Gastroenterology 2024年第36期30卷 4071-4077页

作者： Li-Cong Liang Wen-Sou huang Zhao-xiong Guo Hong-Ji You Yong-Jian Guo Ming-Yue Cai Li-Teng Lin Guo-Ying Wang Kang-Shun Zhu Department of Minimally Invasive Interventional Radiology The Second Affiliated Hospital of Guangzhou Medical UniversityGuangzhou 510260Guangdong ProvinceChina Department of Nuclear Medicine The Second Affiliated Hospital of Guangzhou Medical UniversityGuangzhou 510260Guangdong ProvinceChina Department of Hepatobiliary Surgery The First Affiliated Hospital of Guangzhou Medical UniversityGuangzhou 510120Guangdong ProvinceChina

BACKGROUND Surgical resection and liver transplantation(LT)are the most effective curative options for hepatocellular carcinoma(HCC).However,few patients with huge HCC(>10 cm in diameter),especially those with portal vein tumor thrombus(PVTT),can receive these *** internal radiation therapy(SIRT)can be used as a conversion therapy for them because it has the dual benefit of shrinking tumors and increasing residual hepatic ***,in patients with huge HCC,high lung absorbed dose often prevents them from receiving *** SUMMARY A 35-year-old man was admitted because of emaciation and pain in the hepatic region for about 1 *** computed tomography scan showed a 20.2 cm×19.8 cm tumor located in the right lobe–left medial lobes with right portal vein and right hepatic vein *** the pathological type of HCC was confirmed by biopsy,two conversions were *** first one was drug-eluting bead transarterial chemoembolization plus hepatic arterial infusion chemotherapy and lenvatinib and sintilimab,converted to SIRT,and the second one was sequential SIRT with continued systemic *** tumor size significantly decreased from 20.2 cm×19.8 cm to 16.2 cm×13.8 cm,then sequentially to 7.8 cm×6.8 *** the meantime,the ratio of spared volume to total liver volume increased gradually from 34.4%to 55.7%,then to 62.9%.Furthermore,there was visualization of the portal vein,indicating regression of the tumor ***,owing to the new tumor in the left lateral lobe,the patient underwent LT instead of resection without major *** Patients with inoperable huge HCC with PVTT could be converted to SIRT first and accept surgery sequentially.

关键词： Hepatocellular carcinoma Two conversions Liver transplantation Yttrium-90 resin microspheres Transarterial chemoembolization Hepatic arterial infusion chemotherapy Case report

聚丙烯/聚苯乙烯共混物超临界流体微孔发泡的研究

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塑料 2008年第2期37卷 14-18页

作者：许红飞黄汉雄王建康华南理工大学工业装备与控制工程学院塑料橡胶装备及智能化研究中心广东广州510640

共混改性是改善聚丙烯(PP)发泡性能的一种有效方法。文章以PP聚/苯乙烯(PS)共混体系为研究对象,采用自制的高压釜装置进行发泡,并用扫描电镜观察发泡样品的泡孔结构。通过比较泡孔形态、泡孔密度和泡孔直径等,分析了PP/PS共混物组份比... 详细信息

共混改性是改善聚丙烯(PP)发泡性能的一种有效方法。文章以PP聚/苯乙烯(PS)共混体系为研究对象,采用自制的高压釜装置进行发泡,并用扫描电镜观察发泡样品的泡孔结构。通过比较泡孔形态、泡孔密度和泡孔直径等,分析了PP/PS共混物组份比对泡孔结构的影响。结果显示:在PP中加入PS可以改善泡孔结构;随着PS含量的增加,泡孔平均直径逐渐增大,泡孔密度逐渐减小;PS分散相分布较均匀时,更有利于产生均匀分布的泡孔结构。

关键词：微孔发泡聚丙烯聚苯乙烯共混

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醋酸淀粉／聚乳酸的制备及性能的影响研究

化学研究与应用 2010年第3期22卷 387-391页

作者：张水洞黄汉雄颜斌玉蒋果华南理工大学机械与汽车工程学院塑料橡胶装备及智能化研究中心广东广州510640

采用自设计的双螺杆结构挤出制备聚乳酸(PLA)/醋酸淀粉(AS)的全生物降解材料,考察材料的AS的含量和取代度对复合材料动态流变性能、机械性能的影响。研究结果表明,AS含量明显影响复合材料的力学性能、复合黏度和储能模量:当AS含量从45%... 详细信息

采用自设计的双螺杆结构挤出制备聚乳酸(PLA)/醋酸淀粉(AS)的全生物降解材料,考察材料的AS的含量和取代度对复合材料动态流变性能、机械性能的影响。研究结果表明,AS含量明显影响复合材料的力学性能、复合黏度和储能模量:当AS含量从45%增加到70%,材料的拉伸强度下降,复数黏度和储能模量则提高。随着AS取代度由1.0上升为3.0,复合材料的复数黏度和储能模量下降,拉伸强度由12.0MPa上升为15.5MPa。对复合材料进行电镜扫描分析发现,AS以海岛结构形式分散在PLA的连续相中,取代度2.0的AS与PLA相容性最好,当其质量含量达到70%,材料的拉伸强度仍然不低于10.0MPa,具有较好的机械强度。

关键词：醋酸淀粉聚乳酸取代度流变性能力学性能

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声致水介质发光实验研究

原子能科学技术 2007年第2期41卷 177-179页

作者：鲍杰刘永辉黄翰雄杨健付强周祖英唐洪庆中国原子能科学研究院核物理研究所北京102413 兰州大学物理系甘肃兰州730000 南华大学物理系湖南衡阳421000

本工作涉及声致水介质发光的实验研究。在中国原子能科学研究院首次建立了1套完整的声致水介质发光的实验系统。利用该系统实现了单气泡发光,持续发光时间超过1 h。本工作为研究声致发光机制研制了必要的实验设备,为进一步进行声致核聚... 详细信息

本工作涉及声致水介质发光的实验研究。在中国原子能科学研究院首次建立了1套完整的声致水介质发光的实验系统。利用该系统实现了单气泡发光,持续发光时间超过1 h。本工作为研究声致发光机制研制了必要的实验设备,为进一步进行声致核聚变实验研究打基础。

关键词：声致发光单泡发光中子

蒙特卡罗方法在圆柱型多丝正比室多路望远镜系统中的应用

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原子能科学技术 2007年第6期41卷 674-677页

作者：程品晶阮锡超周祖英蒋婧李霞黄翰雄唐洪庆凌球南华大学核科学技术学院湖南衡阳421001 中国原子能科学研究院北京102413

基于圆柱型多丝正比室的多路望远镜系统具有良好的粒子鉴别性能和真事件判选特性,可同时进行多个反应角度的测量,也可同时进行效应谱和本底谱的测量,适合用于研究快中子引起的出射带电粒子的反应。简要介绍了该系统的基本结构及特点,并... 详细信息

基于圆柱型多丝正比室的多路望远镜系统具有良好的粒子鉴别性能和真事件判选特性,可同时进行多个反应角度的测量,也可同时进行效应谱和本底谱的测量,适合用于研究快中子引起的出射带电粒子的反应。简要介绍了该系统的基本结构及特点,并说明蒙特卡罗方法在该系统中的实际应用情况。

关键词：多丝正比室多路望远镜系统蒙特卡罗方法 MCNP程序中子注量

FGF4 protects the liver from immune-mediated injury by activating CaMKKβ-PINK1 signal pathway to inhibit hepatocellular apoptosis

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Acta Pharmaceutica Sinica B 2024年第6期14卷 1605-1623页

作者： Zhifeng huang Tongtong Pan Liang Xu Lu Shi xiong Ma Liya Zhou Luyao Wang Jiaojiao Wang Guoqing Zhu Dazhi Chen Lingtao Song Xiaomin Pan Xiaodong Wang Xiaokun Li Yongde Luo Yongping Chen Hepatology Diagnosis and Treatment Center Zhejiang Provincial Key Laboratory for Accurate Diagnosis and Treatment of Chronic Liver Diseasesthe First Affiliated Hospital of Wenzhou Medical UniversityWenzhou 325035China Oujiang Laboratory(Zhejiang Lab for Regenerative Medicine Vision and Brain Health)&School of Pharmaceutical SciencesWenzhou Medical UniversityWenzhou 325035China School of Laboratory Medicine and Life Sciences Wenzhou Medical University&Key Laboratory of Laboratory MedicineMinistry of EducationWenzhou Medical UniversityWenzhou 325035China Division of Gastroenterology and Hepatology Key Laboratory of Gastroenterology and HepatologyMinistry of HealthState Key Laboratory for Oncogenes and Related GenesRenji HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghai 200001China hangzhou Medical College Hangzhou 311300China

Immune-mediated liver injury (ILI) is a condition where an aberrant immune response due to various triggers causes the destruction of hepatocytes. Fibroblast growth factor 4 (FGF4) was recently identified as a hepatoprotective cytokine;however, its role in ILI remains unclear. In patients with autoimmune hepatitis (type of ILI) and mouse models of concanavalin A (ConA)- or S-100-induced ILI, we observed a biphasic pattern in hepatic FGF4 expression, characterized by an initial increase followed by a return to basal levels. Hepatic FGF4 deficiency activated the mitochondria-associated intrinsic apoptotic pathway, aggravating hepatocellular apoptosis. This led to intrahepatic immune hyper-reactivity, inflammation accentuation, and subsequent liver injury in both ILI models. Conversely, administration of recombinant FGF4 reduced hepatocellular apoptosis and rectified immune imbalance, thereby mitigating liver damage. The beneficial effects of FGF4 were mediated by hepatocellular FGF receptor 4, which activated the Ca^(2+)/calmodulin-dependent protein kinasekinase 2 (CaMKKβ) and its downstream phosphatase and tensin homologue-induced putative kinase 1 (PINK1)-dependent B-cell lymphoma 2-like protein 1-isoform L (Bcl-XL) signalling axis in the mitochondria. Hence, FGF4 serves as an early response factor and plays a protective role against ILI, suggesting a therapeutic potential of FGF4 and its analogue for treating clinical immune disorder-related liver injuries.

关键词： Fibroblast growthfactor 4 Fibroblast growth factor receptor 4 Immune liver injury Ca^(2+)/Calmodulin dependent protein