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| 1 | Macrophage migration inhibitory factor stimulated by He/icobacter py/oriincreases proliferation of gastric epithelial cells显示文摘AIM: Helicobacter pylori (H pylori) is associated with increased gastric inflammatory and epithelial expression of macrophage migration inhibitory factor (MIF) and gastric epithelial cell proliferation. This study aimed at determining whether H pylori directly stimulates release of MIF in monocytes, whether the cay pathogenicity island (PAI) is involved for this function, and whether MIF stimulated by H pylori increases gastric epithelial cell proliferation in vitro.METHODS: A cytotoxic wild-type H pylori strain (TN2),its three isogenic mutants (TN2△cag, TN2△cagA and TN2△cagE) were co-cultured with cells of a human monocyte cell line, THP-1, for 24 h at different organism/cell ratios. MIF in the supernatants was measured by an ELISA. Cells of a human gastric cancer cell line, MKN45,were then co-cultured with the supernatants, with and without monoclonal anti-MIF antibody for 24 h. The cells were further incubated for 12 h after addition of 3H-thymidine, and the levels of incorporation of 3H-thymidine were measured with a liquid scintillation counter.RESULTS: The wild-type strain and the isogenic mutants,TN2△cagA and TN2△cagE, increased MIF release at organism/cell ratios of 200/1 and 400/1, but not at the ratios of 50/1 and 100/1. However, the mutant TN2△cag did not increase the release of MIF at any of the four ratios.3H-thymidine readings for MKN-45 cells were significantly increased with supernatants derived from the wild-type strain and the mutants TN2△cagA and TN2△cagE, but not from the mutant TN2△cag. Moreover, in the presence of monoclonal anti-MIF antibody, the stimulatory effects of the wild-type strain on cell proliferation disappeared.CONCLUSION: H pylori stimulates MIF release in monocytes, likely through its cag PAI, but not related to cagA or cagE. H pylori-stimulated monocyte culture supernatant increases gastric cell proliferation, which is blocked by anti-MIF antibody, suggesting that MIF plays an important role in H pylori-induced gastric epithelial cell proliferation. | Harry Hua-Xiang Xia Shiu Kum Lam Annie O.O.Chan Marie Chia Mi Lin Hsiang Fu Kung Keiji Ogura Douglas E.Berg Benjamin Chun-Yu Wong | 2005 | World Journal of Gastroenterology2005，11，13： | 12 |
| 2 | Numerical simulation of low pressure die-casting aluminum wheel显示文摘The FDM numerical simulation software,ViewCast system,was employed to simulate the low pressure die casting(LPDC)of an aluminum wheel.By analyzing the mold-filling and solidification stage of the LPDC process,the distribution of liquid fraction,temperature field and solidification pattern of castings were studied.The potential shrinkage defects were predicted to be formed at the rim/spoke junctions,which is in consistence with the X-ray detection result.The distribution pattern of the defects has also been studied.A solution towards reducing such defects has been presented.The cooling capacity of the mold was improved by installing water pipes both in the side mold and the top mold.Analysis on the shrinkage defects under forced cooling mode proved that adding the cooling system in the mold is an effective method for reduction of shrinkage defects. | Mi Guofa Liu Xiangyu Wang Kuangfei Fu Hengzhi | 2009 | China Foundry2009，6，1： | 11 |
| 3 | Intermittent fasting promotes adipose thermogenesis and metabolic homeostasis via VEGF-mediated alternative activation of macrophage显示文摘 | Kyoung-Han Kim Yun Hye Kim Joe Eun Son Ju Hee Lee Sarah Kim Min Seon Choe Joon Ho Moon Jian Zhong Kiya Fu Florine Lenglin Jeong-Ah Yoo Philip J Bilan Amira Klip Andras Nagy Jae-Ryong Kim Jin Gyoon Park Samer MI Hussein Kyung-Oh Doh Chi-chung Hui Hoon-Ki Sung | 2017 | Cell Research2017，27，11： | 9 |
| 4 | Improvement in cardiac function after sarcoplasmic reticulum Ca^2+-ATPase gene transfer in a beagle heart failure model显示文摘背景心失败(HF ) 全球是病态和死亡的一个主要原因,但是当前的治疗形式不能颠倒心的内在的病理学的状态。基于基因的治疗在 HF 病人作为有希望的治疗学的形式正在出现。我们的以前的研究显示出那 recombinant 联系 adeno 病毒(rAAV ) Sarco-endoplasmic 蜂窝胃钙 ATPase (SERCA2a ) 的基因转移能在与长期的心失败(CHF ) 对待老鼠是有效的。学习是在大 HF 动物 model.Methods HF 检验 SERCA2a 基因转移的效果的这的目的被快速的权利在猎兔犬导致室的踱步(230 beats/min ) 为 30 天。减少的率(180 beats/min ) 室的踱步为另外一个被继续 30 天。猎兔犬被分到四个组:(a) 控制组(n=4 ) ;(b) HF 组(n=4 ) ;(c) 提高了绿色荧光灯蛋白质组(n=4 ) ;并且(d) SERCA2.a 组(n=4 ) 。rAAVl-EGFP (lx1012 g ) 和 rAAVl-SERCA2a (lx1012 g ) intramyocardially 被交付。SERCA2.a 表示被在它的蛋白质表达式是的 HF 猎兔犬的西方的弄污和 immunohistochemistry.Results 追随者 30 天 SERCA2a 基因转移估计比在 HF 组显著地高比在控制组(P < 0.05 ) 。心功能与 SERCA2a 表示的增加一起改善了。包括喷射部分,显著地改进的左室的收缩功能离开了室的收缩压力,左室的压力(+dp/dtmax ) 的上升的最大的率,和左室的压力的衰落的最大的率(-dp/dtmax)(P < 0.05 ) 。左室的结束扩张压力显著地减少了(P < 0.05 ) 。在心肌的织物的 SERCA2a 的表示比在 HF 组在 SERCA2a 组是更高的(P < 0.05 ) 。rAAVl-SERCA2a 的结论 Intramyocardial 注射能在导致与的猎兔犬改进心脏的功能他我们在与 HF 在人使用它前在 SERCA2a 的长期的安全,功效,剂量和优化上期望进一步的研究。 | MI Ya-fei LI Xiao-ying TANG Li-jiang LU Xiao-chun FU Zhi-qing YE Wei-hua | 2009 | Chinese Medical Journal2009，，12： | 8 |
| 5 | Integrating landscape ecological principles and land evaluation for sustainable land use显示文摘1IntroductionRisingpopulationscompetingforlimitedlandresourceshavefocusedatentionontheneedforincreasingfoodproduction,whilepr... | Fu Bo jie, Chen Li ding Research Centre for Eco Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China He Chan sheng Department of Geography, Western Michigan University, Kalamazoo, MI 49008, USA | 1999 | Journal of Environmental Sciences1999，11，2： | 8 |
| 6 | SUMOylation of RIG-I positively regulates the type I interferon signaling显示文摘Retinoic acid-inducible gene-I(RIG-I)functions as an intracellular pattern recognition receptor(PRR)that recognizes the 5'-triphosphate moiety of single-stranded RNA viruses to initiate the innate immune response.Previous studies have shown that Lys63-linked ubiquitylation is required for RIG-I activation and the downstream anti-viral type I interferon(IFN-I)induction.Herein we reported that,RIG-I was also modified by small ubiquitin-like modifier-1(SUMO-1).Functional analysis showed that RIG-I SUMOylation enhanced IFN-I production through increased ubiquitylation and the interaction with its downstream adaptor molecule Cardif.Our results therefore suggested that SUMOylation might serve as an additional regulatory tier for RIG-I activation and IFN-I signaling. | Zhiqiang Mi Jihuan Fu Yanbao Xiong Hong Tang | 2010 | Protein & Cell2010，1，3： | 6 |
| 7 | Ecotoxicological effects of mixed pollutants resulted from e-wastes recycling and bioaccumulation of polybrominated diphenyl ethers in Chinese loach(Misgurnus anguillicaudatus)显示文摘To understand potential ecotoxicological effects of electrical and electronic equipment waste (e-waste) recycling and polybrominated diphenyl ethers (PBDEs) bioaccumulation in loaches, a semi-field experiment using Chinese loach (Misgurnus anguillicaudatus) as experimental fish was performed. Larval loaches were kept in net-cage for three months in an e-wastes recycling site and a reference site in Southeastern China. There was significant difference of the survival rate between the loaches from the e-wastes recycling site (27%, 19/70) and from reference site (70%, 49/70). Histopathological responses were also found in all the livers examined in loaches from the e-wastes recycling site. These results showed that mixed pollutants resulted from e-wastes recycling led to ecotoxicological effects on loaches. The bioaccumulation of polybrominated diphenyl ethers (PBDEs), the main pollutants in e-waste, in loaches was also studied, the mean concentration of total PBDEs in sediment was 6726.17 ng/g wet weight and in water samples was 4.08 ng/L (dissolved phase). BDE 209 was the dominant congener in sediment and with relatively high concentration in water. Relatively low concentration of BDE 209 (less than 0.01% of total PBDEs) and high concentration of BDE47 (up to 39.34% of total PBDEs) were detected in loaches. | QIN Xiaofei XIA Xijuan LI Yan ZHAO Yaxian YANG Zhongzhi FU Shan TI-AN Mi ZHAO Xingru QIN Zhanfen XU Xiaobai YANG Yongjian | 2009 | Journal of Environmental Sciences2009，21，12： | 6 |
| 8 | Numerical simulation and optimization of Al alloy cylinder body by low pressure die casting显示文摘Shrinkage defects can be formed easily at critical location during low pressure die casting (LPDC) of aluminum alloy cylinder body. It has harmful effect on the products. Mold filling and solidification process of a cylinder body was simulated by using of Z-CAST software. The casting method was improved based on the simulation results. In order to create effective feeding passage, the structure of casting was modified by changing the location of strengthening ribs at the bottom, without causing any adverse effect on the part's performance. Inserting copper billet at suitable location of the die is a valid way to create suitable solidification sequence that is beneficial to the feeding. Using these methods, the shrinkage defect was completely eliminated at the critical location. | Mi Guofa Liu Yanlei Zhao Hengtao Fu Hengzhi | 2008 | China Foundry2008，5，2： | 5 |
| 9 | Substrate stiffness differentially impacts autophagy of endothelial cells and smooth muscle cells显示文摘Stiffening of blood vessels is one of the most important characteristics in the process of many cardiovascular pathologies such as atherosclerosis,angiosteosis,and vascular aging.Increased stiffness of the vascular extracellular matrix drives artery pathology and alters phenotypes of vascular cell.Understanding how substrate stiffness impacts vascular cell behaviors is of great importance to the biomaterial design in tissue engineering,regenerative medicine,and medical devices.Here we report that changing substrate stiffness has a significant impact on the autophagy of vascular endothelial cells(VECs)and smooth muscle cells(VSMCs).Interestingly,our findings demonstrate that,with the increase of substrate stiffness,the autophagy level of VECs and VSMCs showed differential changes:endothelial autophagy levels reduced,leading to the reductions in a range of gene expression associated with endothelial function;while,autophagy levels of VSMCs increased,showing a transition from contractile to the synthetic phenotype.We further demonstrate that,by inhibiting cell autophagy,the expressions of endothelial functional gene were further reduced and the expression of VSMC calponin increased,suggesting an important role of autophagy in response of the cells to the challenge of microenvironment stiffness changing.Although the underlying mechanism requires further study,this work highlights the relationship of substrate stiffness,autophagy,and vascular cell behaviors,and enlightening the design principles of surface stiffness of biomaterials in cardiovascular practical applications. | Mi Hu Fan Jia Wei-Pin Huang Xu Li Deng-Feng Hu Jing Wang Ke-Feng Ren Guo-Sheng Fu Yun-Bing Wang Jian Ji | 2021 | Bioactive Materials2021，6，5： | 5 |
| 10 | Fabrication of scaffolds in tissue engineering: A review显示文摘 | Peng ZHAO Haibing GU Haoyang MI Chengchen RAO Jianzhong FU Lih-sheng TURNG | 2018 | Frontiers of Mechanical Engineering2018，13，1： | 5 |
| 11 | Cytokines predict virological response in chronic hepatitis B patients receiving peginterferon alfa-2a therapy显示文摘BACKGROUND Chronic hepatitis B virus infection remains a major global public health problem.Peginterferon-alpha-2a(PEG-IFN)has direct antiviral and immunoregulatory effects,and it has become one of the first choice drugs for the treatment of chronic hepatitis B(CHB).Cytokines play an important role in immunity,and they directly inhibit viral replication and indirectly determine the predominant pattern of the host immune response.AIM To determine the correlation between cytokine/chemokine expression levels and response to PEG-IFN treatment in patients with CHB.METHODS Forty-six kinds of cytokines were analyzed before PEG-IFN therapy and at 24 wk during therapy in 26 CHB patients.RESULTS The monokine induced by INF-γ(CXCL9)and serum interferon-inducible protein 10(IP-10)levels at baseline were higher in virological responders than in nonvirological responders(NRs)and decreased during treatment,whereas the NRs did not exhibit significant changes.The macrophage inflammatory protein 1d(MIP-1d)levels at baseline and during treatment were significantly higher in the virological responders than in the NRs,while thymus and activation-regulated chemokine(TARC)levels at baseline and during treatment were significantly lower in the virological responders than in the NRs.The CXCL9,IP-10,MIP-1d,and TARC baseline levels exhibited the expected effects for interferon treatment.The area under the receiver operating characteristic curve values of CXCL9,IP-10,MIP-1d,and TARC for predicting virological responses were 0.787,0.799,0.787,and 0.77(P=0.01,0.013,0.01,and 0.021),respectively.CONCLUSION We found that cytokine levels before and during treatment may represent potential biomarkers to select CHB patients who can respond to PEG-IFN.Therefore,cytokines can be used as an indicator of antiviral drug selection before CHB treatment. | Wen-Kang Fu Jie Cao Ning-Ning Mi Chong-Fei Huang Long Gao Jin-Duo Zhang Ping Yue Bing Bai Yan-Yan Lin Wen-Bo Meng | 2020 | World Journal of Clinical Cases2020，8，11： | 4 |
| 12 | Synthesis of 3,5-Dichloro-4-(1,1,2,2-tetrafluoroethoxy)phenyl Containing 1,2,3-Thiadiazole Derivatives via Ugi Reaction and Their Biological Activities显示文摘包含 4-methyl-1,2,3-thiadiazole 衍生物的一系列新奇 3,5-dichloro-4-(1,1,2,2-tetrafluoroethoxy ) 苯基经由 Ugi 反应被设计并且综合。他们的结构被红外, 1H NMR, 13C NMR 和高分辨率的集体光谱学证实。初步的生物鉴定结果显示一些标题混合物在 50 g/mL 举办了好杀真菌剂活动;大多数混合物在 500 g/mL 和 100 g/mL 对烟草马赛克病毒介绍了直接抑制活动,好 inactivation 和药品活动的某个度;一些混合物对 Plutella xylostella L 显示出好 larvicidal 活动。在对在 2 g/mL 的一种蚊虫 pipiens pallens 的 200 g/mL 和优秀 larvicidal 活动。 | Wang Shouxin Wang Huan Fan Zhijin Fu Yifeng Mi Na Zhang Jufang Zhang Zhengcai Belskaya Nataliya P. Bakulev Vasiliy A. | 2011 | Chinese Journal of Chemistry2011，29，2： | 4 |
| 13 | Ameliorated stress related proteins are associated with improved cardiac function by sarcoplasmic reticulum calcium ATPase gene transfer in heart failure显示文摘BackgroundPrevious 研究证明在许多心失败(HF ) 模型的 sarco-endoplasmic 蜂窝胃钙 ATPase (SERCA2a ) 的 overexpression 与极大地提高的心脏的性能被联系。然而,它仍然未定义全身的煽动性的反应和 neuro 神经质的 factors.MethodsA 上的 SERCA2a overexpression 的效果试验性的 HF 的快速的恰好室的踱步模型在猎兔犬被使用。然后,动物经历了 recombinant 联系 adeno 的病毒(rAAV1 ) 1 调停了由直接 intra 心肌层的基因 transfection 注射。HF 动物被使随机化收到 SERCA2a 基因,提高的绿色荧光灯缓冲的蛋白质(控制) 基因,或相等的磷酸盐盐。在基因交货以后的三十天,心脏的功能被测试的 echocardiographic 评估。SERCA2a 的蛋白质水平被西方的弄污测量。左的 proteomic 分析室(LV ) 样品被决定用二维(2-D ) 胶化电气泳动和 MALDI-TOF-MS。全身的煽动性、 neuro 神经质的因素的浆液层次是用心脏的功能由于显著地增加的 SERCA2a 蛋白质水平在 SERCA- 2a 基因转移以后改进了的放射性免疫测定 kits.ResultsThe 的 assayed。与 SERCA2a 对待的猎兔犬显著地减少了煽动性的标记的浆液层次(interleukin-6 和肿瘤坏死 factor-α) 并且 neuro 神经质的因素(大脑 natriuretic 肽, endothelin-1 和血管收缩素 II ) 与 HF 动物相比。心肌的 proteomic 分析显示出那 haptoglobin 重链,热吃惊蛋白质( alpha-crystallin-related , B6 )是下面调整的,并且 galectin-1 与 HF 组,相比在 SERCA2a 组是起来调整的由起来调整的可收缩的蛋白质的 companied 和 NADH dehydrogenase.ConclusionsThese 调查结果证明 rAAV1-SERCA2a 向量的地区性的 intramyocardial 注射可以改进全球 LV 功能,与全身的煽动性的、过多的 neuroendocrin | Zhi-Qing Fu Xiao-Ying Li Xiao-Chun Lu Ya-Fei Mi Tao Liu Wei-Hua Ye | 2012 | Journal of Geriatric Cardiology2012，9，3： | 3 |
| 14 | Natural variations in grain length 10(GL10)regulate rice grain size显示文摘Grain size is an important determinant of grain weight and yield in rice.Although several genes related to grain size have been identified,natural variations in these genes that affect grain size are poorly characterized.Here,we describe the grain length QTL GL10,encoding MADS56,which positively regulates grain length and grain weight.A natural allelic variation of NIL-gl10,containing an~1.0-kb deletion in the first exon that abolishes its transcription,results in shorter grain length,lower grain weight and delayed flowering in gl10 plants.The knockout of GL10 in the HJX74 background leads to grain phenotypes similar to that of NIL-gl10,while overexpression of GL10 results in increased grain length and weight and earlier heading date.GL10 regulates grain length by promoting greater longitudinal cell growth in the grain glume.Additionally,GL10 participates in the regulation of gibberellic acid(GA)signaling pathway genes in young panicle tissues.Analysis of GL10 haplotypes shows obvious divergence between the japonica and indica lineages.Our findings reveal an allelic variation of GL10 that may explain differences in grain length among modern cultivars and could be used to breed rice varieties with optimized grain shape. | Penglin Zhan Shuaipeng Ma Zhili Xiao Fangping Li Xin Wei Shaojun Lin Xiaoling Wang Zhe Ji Yu Fu Jiahao Pan Mi Zhou Yue Liu Zengyuan Chang Lu Li Suhong Bu Zupei Liu Haitao Zhu Guifu Liu Guiquan Zhang Shaokui Wang | 2022 | Journal of Genetics and Genomics2022，49，5： | 3 |
| 15 | Wear Property of Cast Steel Wheel Material in Rail Truck显示文摘Wear property of material plays a key role in the service time of workpiece. A major objective in the development of new wheel materials is to improve the wear performance. The wear property of B and B+ grade cast steel materials was reported. The results showed that B+ grade cast steel material exhibited better wear property than the B grade material. Carbon content related to the hardness match was the principal factor affecting the wear properties. | MI Guo-fa LIU Yan-lei ZHANG Bin FU Xiu-qin ZHANG Hong SONG Guo-xiang | 2009 | Journal of Iron and Steel Research(International)2009，16，3： | 3 |
| 16 | Self‐suspended rare‐earth doped up‐conversion luminescent waveguide:propagating and directional radiation显示文摘Near-infrared excited rare-earth(RE)-doped up-conversion(UC)-luminescent materials have attracted enormous attention because of their unique emission properties,such as narrow emission bands,long luminescence lifetimes,and multiple colors.However,current development of RE-doped luminescent material is hindered by weak and narrowband absorption problems and low photon-conversion quantum efficiencies.In addition to conventional approaches to enhance fluorescence intensity,controlling emission directivity to improve detection efficiency has become a promising approach to obtain higher luminescence brightnesses.In this paper,a self-suspended RE-doped UC luminescent waveguide is designed to realize directional emissions.Benefitting from the special morphology of the crown-like NaYF4:Yb3+/Er3+microparticle,the points contact between the waveguide and substrate can be obtained to decrease energy loss.An attractive UC luminescent pattern accompanied by powerful and controllable directional emissions is observed,and the spatial emission angle and intensity distribution are explored and analyzed in detail by introducing Fourier imaging detection and simulation.This work provides a new method for achieving controllable directional fluorescence emissions and obtaining improved detection efficiency by narrowing emission directivity,which has potential applications in 3-dimensional displays and micro-optoelectronic devices,especially when fabricating self-fluorescence micron lasers. | Changjian Zhang Chengyun Zhang Zhenglong Zhang Tao He Xiaohu Mi Ting Kong Zhengkun Fu Hairong Zheng Hongxing Xu | 2020 | Opto-Electronic Advances2020，3，6： | 3 |
| 17 | Dietary Behaviors and Influencing Factors among Rural Left-behind Children Aged below 7 Years in China显示文摘Left-behind children comprise a special population in Chinese rural areas. According to the 2007 China Census, the number of left-behind children aged ≤ 14 years was estimated at 58 million, which suggested that these children constituted a large population, especially in Chinese rural areas[1]. Till date, only a few studies have investigated the problems of dietary behaviors in rural left-behind children. A pilot study indicated that approximately 50% of left-behind children in Chinese rural areas had poor dietary behaviors[2]. Nevertheless, there is still a lack of research with large sample sizes that could reveal the actual background of dietary behaviors in these children. Therefore, we conducted this study to explore the dietary behaviors and their influencing factors among rural left-behind children aged < 7 years in China, which may provide a scientific basis to improve the dietary behaviors of these children. | FAN Chun Li MA Quan Fu LUO Jia You WU Xu Feng LUO Mi Yang ZENG Rong LI Xiao Hui LI Ya Mei FANG Jun Qun | 2018 | Biomedical and Environmental Sciences2018，31，12： | 2 |
| 18 | Associations between serum uric acid and hepatobiliary-pancreatic cancer:A cohort study显示文摘BACKGROUND Uric acid is the end product of purine metabolism.Previous studies have found that serum uric acid(SUA)levels are associated with the total cancer risk.However,due to the dual effect of uric acid on cancer,the relationship between the SUA levels and most specific-site cancer remains unclear.AIM To investigate the associations between the SUA levels and incidence of hepatobiliary-pancreatic cancer.METHODS In this prospective cohort study,444462 participants free of cancer from the UK Biobank were included.The SUA levels were measured at baseline,and the incidence of hepatobiliary-pancreatic cancer was determined by contacting the cancer registry.The hazard ratios(HRs)and 95%confidence intervals(CIs)between the SUA levels and hepatobiliary-pancreatic cancer were investigated using multiple adjusted Cox regression models adjusted for potential confounders.RESULTS In total,920 participants developed liver,gallbladder,biliary tract or pancreatic cancer during a median of 6.6 yrs of follow-up.We found that the HR of pancreatic cancer in the highest SUA group was 1.77(95%CI:1.29-2.42)compared with that in the lowest group.After stratifying by gender,we further found that SUA was associated with an increased risk of pancreatic cancer only among the females(highest quartile vs lowest quartile HR 2.04,95%CI:1.35-3.08).Among the males,the SUA levels were positively associated with the gallbladder cancer risk(highest quartile vs lowest quartile HR 3.09,95%CI:1.28-7.46),but a U-shaped association with the liver cancer risk was observed(P-nonlinear=0.03).CONCLUSION SUA is likely to have gender-specific effects on hepatobiliary-pancreatic cancer.High SUA levels are a risk factor for pancreatic cancer in females and gallbladder cancer in males.A U-shaped association with the liver cancer risk was identified. | Chong-Fei Huang Jun-Jun Huang Ning-Ning Mi Yan-Yan Lin Qiang-Sheng He Ya-Wen Lu Ping Yue Bing Bai Jin-Duo Zhang Chao Zhang Teng Cai Wen-Kang Fu Long Gao Xun Li Jin-Qiu Yuan Wen-Bo Meng | 2020 | World Journal of Gastroenterology2020，26，44： | 2 |
| 19 | Effect of Molecular Weight on the Properties of Poly(butylene succinate)显示文摘Poly(butylene succinate)(PBS) with different molecular weight was synthesized from 1, 4-butanediol and succinic acid by direct melt condensation. The synthesized PBS was identified by 1H-NMR and FTIR spectrometry. The molecular weight was calculated from the intrinsic viscosity, and its value was between 20000 and 70000. The crystallization behavior and crystal morphology as function of molecular weight were investigated by DSC and PLM, respectively. The mechanical properties and hydrolytic degradation behaviors related with change of molecular weight were also studied in this work. The results demonstrated that the properties of PBS were determined by both molecular weight and crystallization properties(crystallinity as well as crystal morphology). Our work is important for the design and preparation of PBS with proper molecular weight for its practical application. | Tian-xiang Jin Mi Zhou Shao-dong Hu Feng Chen 傅强 Yi Fu | 2014 | Chinese Journal of Polymer Science2014，32，7： | 2 |
| 20 | Modeling of Cell/Dendrite Transition During Directional Solidification of Ti-Al Alloy Using Cellular Automaton Method显示文摘Solute diffusion controlled solidification model was used to simulate the initial stage cellular to dendrite transition of Ti44Al alloys during directional solidification at different velocities. The simulation results show that during this process, a mixed structure composed of cells and dendrites was observed,where secondary dendrites are absent at facing surface with parallel closely spaced dendrites, which agrees with the previous experimental observation. The dendrite spacings are larger than cellular spacings at a given rate, and the columnar grain spacing sharply increases to a maximum as solidification advance to coexistence zone. In addition, simulation also revealed that decreasing the numbers of the seed causes the trend of unstable dendrite transition to increase. Finally, the main influence factors affecting cell/dendrite transition were analyzed, which could be the change of growth rates resulting in slight fluctuations of liquid composition occurred at growth front. The simulation results are in reasonable agreement with the results of previous theoretical models and experimental observation at low cooling rates. | WANG Kuang-fei LI Bang-sheng MI Guo-fa GUO Jing-jie FU Heng-zhi | 2008 | Journal of Iron and Steel Research(International)2008，15，3： | 2 |
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