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Insight into the Excellent Tribological Performance of Highly Oriented Poly(phenylene sulfide)

Chinese Journal of Polymer Science 2022年第3期40卷 290-298,I0007页

作者： Liang-Qing Zhang Shu-Gui Yang Jing-Han Zhang Ke-Peng Zhong Zhong-Guo Zhao Yan-Hui chen Jun Lei Qiu-Yu Zhang Zhong-ming Li College of Material Science and Engineering Xi’an University of Science and TechnologyXi’an 710054China State Key Laboratory for Mechanical Behaviour of Materials Shaanxi International Research Center for Soft MaterialsXi’an Jiaotong UniversityXi’an 710049China School of Chemistry and Chemical Engineering Shaanxi Key Laboratory of Macromolecular Science and TechnologyKey Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information TechnologyNorthwestern Polytechnical UniversityXi’an 710072China National and Local Engineering Laboratory for Slag Comprehensive Utilization and Environment Technology School of Materials Science and EngineeringShaanxi University of TechnologyHanzhong 723000China College of Polymer Science and Engineering State Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengdu 610065China

Achieving low friction and wear of poly(phenylene sulfide)(PPS) without using fillers or blending is a challenging task, but one of considerable practical importance. Here we describe how neat PPS with high tribological performance is achieved by manipulating processing parameters(pressure, flow and temperature). The key to achieving high tribological performance is comparatively high molecular chain orientation, realized in neat PPS, at high shear rates and low pressure. The friction coefficient and wear rate are as low as ~0.3 and~10^(-6) mm^(3)·N^(-1)·m^(-1), respectively, which break the record for neat PPS. These values are even better than those for PPS-based blends and comparable to PPS composites. Further studies show, for the first time, that wear rate decreases exponentially with increasing molecular chain orientation, prompting us to revise the classical Archard's law by including the effect of molecular chain orientation. These findings open the possibility of using neat PPS in highly demanding tribological applications.

关键词： Poly(phenylene sulfide) Orientation Wear rate Frication coefficient Processing parameters

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Controlled synthesis of monodispersed spherical ruthenium powders

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Rare Metals 2023年第12期42卷 4246-4254页

作者： Feng-Shuo Xu Hao Cui Man-Men Liu Jia-Lin chen ming Wen Chuan-Jun Wang Wei Wang Song Li Xu-Dong Sun Shao-Hong Liu Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education) School of Materials Science and EngineeringNortheastern UniversityShenyang 110819China State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals Yunnan Precious Metals Laboratory Co.Ltd.Kunming 650106China

Monodispersed spherical Ru powders are essential for fabricating high-performance Ru sputtering targets,which have applications in very-large-scale integration circuits and magnetic recording ***,the synthesis of such powders remains a major ***,we reported the synthesis of monodispersed spherical Ru powders through controlling the molar ratio of SO_(4)^(2-)to Ru^(3+)in urea homogeneous precipitation solution and the annealing *** the addition of(NH4)2SO_(4)into the reaction solution,only gel-like precipitation particles were *** introducing(NH_(4))_(2)SO_(4) into the reaction solution and controlling the molar ratio of SO_(4)^(2-)to Ru3+between 0.50 and 1.00,monodispersed spherical precursor powders were *** nucleation and growth of monodispersed spherical precursor particles in solution were found to conform to LaMer's *** controlled annealing at 450℃in a hydrogen atmosphere,the obtained metallic Ru powder with an average particle size of 135 nm inherited the spherical morphology and excellent dispersity from the monodispersed spherical precursor *** results and findings would deepen the understanding of the preparation of monodispersed Ru and Ru-like powders.

关键词： Ruthenium Sputtering target Spherical powder Integration circuits Magnetic recording

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Isolation and identification of two new compounds from marine-derived fungus Acremonium fusidioides RZ01

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Chinese Journal of Natural Medicines 2016年第12期14卷 934-938页

作者： AN Xiao FENG bao-Min chen Gang chen Shao-Fei WANG Hai-Feng PEI Yue-Hu Key Laboratory of Structure-Based Drug Design & Discovery Ministry of Education Shenyang Pharmaceutical University School of Traditional Chinese Materia Medica Shenyang Pharmaceutical University School of Life Sciences and Biotechnology Dalian University

Two new compounds,(22E)-25-carboxy-8β,14β-epoxy-4α,5α-dihydroxyergosta-2,22-dien-7-one(1) and fusidione(3), along with two known compounds, 5α,8α-epidioxy ergosta-6,22-diene-3β-ol(2) and microperfuranone(4), were isolated from the fermentation products of the marine-sourced fungus Acremonium fusidioides RZ01. The structures of compounds 1 and 3 were elucidated by extensive spectroscopic methods, especially 2D NMR, and their absolute configurations were suggested on the basis of the circular dichroism spectral analysis and the NOESY data. Both new compounds showed inhibitory activity against HL-60 cells with IC50 values being16.6 and 44.9 μmol·L-1, respectively.

关键词： Acremonium fusidioides Chemical constituent Steroid Fusidione

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Location of Sentinel Lymph Node in Gastric Cancer:A Modified,Painless And Noninvasive Approach

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Chinese Journal of Cancer Research 2010年第1期22卷 55-61页

作者： Xin-hui Su Qiang chen Long Sun Hua Wu Wei-ming Pan Gui-bing chen Zuo-ming Luo Wei Wang Department of Nuclear Medicine the First Hospital of Xiamen Fujian Medical University Xiamen 361003 China School of Life Sciences Xiamen University Xiamen China Department of Anatomy Histology and Embryology School of Basic Medical Sciences Fuiian Medical University Fuiian China

Objective： The presence of lymph node metastases is an important factor in the prognosis of gastric cancer patient. Therefore, the precise identification of sentinel lymph nodes （SLN） in these patients is critical. In this work, we investigated the feasibility and preciseness by injection of 99mTc-sulfur colloid （SC） 2 hours before operation after general anesthesia, instead of one day before surgery. Methods： Thirty-one patients of gastric cancer diagnosed as T1-T3 were enrolled in this study. During operation, a SLN was defined as those containing 10 times more radioactivity than surrounding tissue with a hand-held gamma probe and removed. All the patients underwent radical gastrectomy with extended lymphadenectomy. All resected nodes were examined postoperatively by routine H＆E stain and those negative SLNs were examined with further cytokeratin immunohistochemistical staining. Results： The incidence of metastasis was significantly higher in SLNs than in non-SLNs （x2=67.48, P〈0.001）. The overall sensitivity, specificity and accuracy of the SLN status in the diagnosis of the lymph node status of the patient were 86.36%, 100% and 96.77%, respectively. The positive predictive value and negative predictive value of SLN biopsy were 100%, and 75.0%, respectively. SLNs were used to diagnose the lymph node status with 100% accuracy in the T1 group. In the T2 and T3 groups, the sensitivity, specificity, and diagnostic accuracy were 92.3%, 100%, and 94.44%, 60.0%, 100%, and 66.66%, respectively. Most of the SLNs were located in the #1, #2, #3, #4, #5, and #6, except in 3 patients （9.68%）.With cytokeratin immunohistochemical staining, lymphatic pathologic staging in 1 patient was upstaged. Conclusion： SLN biopsy with the above approach is a feasible and accurate diagnostic procedure for detecting lymph node metastasis in patients with gastric cancer, which is painless, noninvasive, easily accepted by patients and suitable for extensive clinical applications.

关键词： Gastric cancer Sentinel lymph node location Radiocolloid Injection time

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喷墨打印有机电致发光器件成膜优化研究进展

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光谱学与光谱分析 2020年第10期40卷 3071-3076页

作者：曹宝龙王明昊李雪陈淑芬南京工程学院机械工程学院江苏南京211167 南京邮电大学信息材料与纳米技术研究院江苏南京210023

有机电致发光器件(OLEDs)具有低能耗、高效率、高色域等优点,在当前的显示行业中展现出巨大的应用前景。在当前的市场上,主要是通过蒸镀的方式来制造有机发光显示器件。在OLEDs各种制备技术中,喷墨打印相对于目前主流的蒸镀方式,可以有... 详细信息

有机电致发光器件(OLEDs)具有低能耗、高效率、高色域等优点,在当前的显示行业中展现出巨大的应用前景。在当前的市场上,主要是通过蒸镀的方式来制造有机发光显示器件。在OLEDs各种制备技术中,喷墨打印相对于目前主流的蒸镀方式,可以有效提高材料利用率,减小资源浪费,然而,在利用喷墨打印制备优质薄膜的实际操作过程中,研究人员发现在薄膜表面经常会出现“咖啡环”效应这种成膜缺陷,这种缺陷的存在不仅影响了膜层质量和器件的性能,同时也在某种程度上制约了喷墨打印技术的进一步发展。通过对喷墨打印技术成膜的一系列相关工作进行整理,总结并分析了喷墨打印成膜缺陷——“咖啡环”的形成原因,并归纳了目前已被证实的可以提高成膜质量的相应策略。针对“咖啡环”现象的主要形成原因,我们主要从抑制液滴内部的毛细流动、增大向内的Marangoni流和控制三相线滑移这三个角度对以往的研究工作进行了分析概括。通过分析总结,发现主要是通过三种途径来达到抑制毛细流动的目的:首先是增加毛细流动阻力,其次还可以调整溶液的蒸发条件,此外依靠粒子间的相互作用也可以达到抑制毛细流动的目的;同时,现在有两种主流的方法来增大向内的Marangoni流,一种是通过改变溶剂组成从而改变液滴表面张力达到优化Marangoni流的目的,另外一种是通过添加表面活性剂来增大Marangoni流;对于控制三相线滑移,通过对以往研究的分析,总结了三种方法,一种是使用电润湿法处理液滴,一种是改变粒子与基板之间的粘滞效应,还有一种是通过对基板进行表面处理来控制三相线滑移。最终,基于以上的一系列优化和改进,在研究人员的不断努力下,目前基本已经可以实现喷墨打印薄膜的均匀调控。

关键词：喷墨打印 “咖啡环”效应液滴沉积

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Eosinophilic gastroenteritis with ascites and hepatic dysfunction

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World Journal of Gastroenterology 2007年第8期13卷 1303-1305页

作者： Hai-Bo Zhou Jin-ming chen Qin Du Department of Gastroenterology Second Affiliated Hospital of Zhejiang University Hangzhou 310009 Zhejiang Province China

Eosinophilic gastroenteritis is a rare gastrointestinal disorder with eosinophilic infiltration of the gastrointestinal wall and various gastrointestinal dysfunctions. Diagnosis requires a high index of suspicion and exclusion of various disorders that are associated with peripheral eosinophilia. We report a case of eosinophilic gastroenteritis, which had features of the predominant subserosal type presenting with ascites and hepatic dysfunction, and which responded to a course of low-dose steroid.

关键词： Ascites Eosinophilia Gastroenteritis

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广西碳减排潜力及低碳发展策略

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同济大学学报（自然科学版） 2017年第6期45卷 861-868页

作者：陈和平包存宽同济大学环境科学与工程学院上海200092 中国石油化工股份有限公司上海石油化工研究院上海201208 复旦大学环境科学与工程系上海200433

以广西2005—2014年的碳排放数据为基础,采用对数平均Divisia分解法对经济发展、能源结构和能源效率等碳排放因素进行分解,并分析了广西碳减排潜力.结果表明:广西人均碳排放不断增长,经济发展是主要驱动力,但能源结构和能源效率对人均... 详细信息

以广西2005—2014年的碳排放数据为基础,采用对数平均Divisia分解法对经济发展、能源结构和能源效率等碳排放因素进行分解,并分析了广西碳减排潜力.结果表明:广西人均碳排放不断增长,经济发展是主要驱动力,但能源结构和能源效率对人均碳排放具有抑制作用;广西碳减排潜力最大的是工业部门,重点是高耗能行业.最后针对广西经济发展的特点和目标提出了优先排序和分阶段实施碳减排的低碳发展策略,并从技术、管理、经济和能源结构以及制度等方面提出了减排措施.

关键词：碳排放碳减排能源结构能源效率低碳发展

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A Discussion About Makeup and No Makeup

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Women of China 1996年第3期 39-40页

作者： XIAO ming chen SHANSHAN

WHEN the Beijing Evening News carried her essay Facing the World Without Makeup, (also carried in our May 1993 issue), Bi Shumin never expected it to arouse readers’ interest, especially women readers. Bi Shumin, an ... 详细信息

关键词： A Discussion About Makeup and No Makeup Zhang

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Paying the Price of Divorce

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Women of China 1999年第11期 10-11,31页

作者： XIAO ming chen SHANSHAN

IN the 1990s,a woman divorcee is nolonger a scandal nor a *** longer feel obliged to continue withunhappy,unsuitable marriages andthose in such a position are freeingthemselves and gaining their social

关键词： Paying the Price of Divorce

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Transcriptome analysis and candidate gene identification reveals insights into the molecular mechanisms of hypermelanosis in Chinese tongue sole(Cynoglossus semilaevis)

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Aquaculture and Fisheries 2022年第6期7卷 601-609页

作者： Yangzhen Li Peng cheng ming Li Yuanri Hu Zhongkai Cui Chuantao Zhang Songlin chen Key Laboratory for Sustainable Development of Marine Fisheries Ministry of AgricultureYellow Sea Fisheries Research InstituteChinese Academy of Fishery SciencesQingdao266071China Laboratory for Marine Fisheries Science and Food Production Processes Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao266237China National Demonstration Center for Experimental Fisheries Science Education Shanghai Ocean UniversityShanghai201306China

Blind-side hypermelanosis has emerged as a major concern in flatfish aquaculture worldwide,including tongue sole(Cynoglossus semilaevis)in *** causative gene and the molecular basis are still *** this study,comparative transcriptome analyses were performed using different skin tissues of tongue sole:ocular-side normal(pigmented)skin,blind-side normal(non-pigmented)skin and blind-side hypermelanotic(pigmented)***,60 key hypermelanosis-related genes were mined,providing potential candidate gene resources involved in blind-side *** genes were selected based on the log2(FoldChange)and false discovery rate(FDR)values(with corresponding P-Values<0.05),and they were verified in other species to assess if they were directly or indirectly related to *** protein-protein interaction network of these 60 genes and the relationship between tyr and other key hypermelanosis-related genes were *** qRT-PCR validation of 16 differentially expressed genes(DEGs)showed that the data of qRT-PCR were consistent with those of *** analyses revealed that the selected DEGs were significantly overrepresented in several pigment metabolic processes and in the melanogenesis *** results may imply that blind-side hypermelanosis is a pattern of environmental regulation of gene expression and adaptation in ***brane transport proteins(such as OCA2 and SLC45A2)may serve as a“switch”for melanogenesis in tongue ***,this study provided novel insights into the molecular mechanism of hypermelanosis in flatfish species and will facilitate future selective breeding of tongue sole for this market-favoured trait in aquaculture.

关键词： Cynoglossus semilaevis Hypermelanosis Transcriptome Flatfish

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