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    题名 作者 年代 出处 被引量
1慢性炎症、肿瘤微环境与癌变显示文摘某些肿瘤发生前或发生时常有慢性炎症。抗炎疗法在癌症的预防及治疗中也显现出一定的疗效。创伤愈合演变为癌症前兆的具体机理已成为当前研究的热点。已有研究证实,炎症介质、炎症相关基因多态性与癌变之间存在病原学关系。潜在的炎症过程可通过不同的机理影响肿瘤间室与癌症分期,Tamas A. Gonda Shuiping Tu Timothy C. Wang 丁燕(翻译) 南娟(翻译) 刘谦(校对) 2009中国肺癌杂志2009,12,9:55
2Effects of sediment dredging on water quality and zooplankton community structure in a shallow of eutrophic lake显示文摘Effects of suction dredging on water quality and zooplankton community structure in a shallow of eutrophic lake,were evaluated.The results showed that a decreasing trend for levels of phosphorus,organic matter,total suspended solids,Chlorophyll a and Secchi transparency in the water column was found,while levels of water depth,electrical conductivity,total dissolved solids and NO 3--N concentration increased markedly post-dredging.The effects of dredging on dissolved oxygen,pH value and temperature were almost negligible.The zooplankton community structure responded rapidly to the environmental changes caused mainly by dredging.As a result,the abundance of rotifers decreased,while the density of zooplanktonic crustaceans increased markedly.The representative taxa were Brachionus angularis,B.budapestinensis,B.diversicornis,Synchaeta spp.and Neodiaptomus schmackeri.A distinct relationship between zooplankton taxa composition and their environment,unraveled by a redundancy analysis,indicating that the measured environment contributed to the variations in the zooplankton community structure to some extent.The first four synthetic environmental variables explained 51.7% of the taxonomic structure.Therefore,with the reduction of internal nutrient load and a shift in dominance by less eutrophic species,it inferred that dredging might be one of effective measures for environmental improvements of such lakes.Shiyang Zhang Qiaohong Zhou Dong Xu Jidong Lin Shuiping Cheng Zhenbin Wu 2010Journal of Environmental Sciences2010,22,2:41
3Erianin,a novel dibenzyl compound in Dendrobium extract,inhibits lung cancer cell growth and migration via calcium/calmodulin-dependent ferroptosis显示文摘Ferroptosis,a novel form of programmed cell death,is characterized by iron-dependent lipid peroxidation and has been shown to be involved in multiple diseases,including cancer.Stimulating ferroptosis in cancer cells may be a potential strategy for cancer therapy.Therefore,ferroptosis-inducing drugs are attracting more attention for cancer treatment.Here,we showed that erianin,a natural product isolated from Dendrobium chrysotoxum Lindl,exerted its anticancer activity by inducing cell death and inhibiting cell migration in lung cancer cells.Subsequently,we demonstrated for the first time that erianin induced ferroptotic cell death in lung cancer cells,which was accompanied by ROS accumulation,lipid peroxidation,and GSH depletion.The ferroptosis inhibitors Fer-1 and Lip-1 but not Z-VAD-FMK,CQ,or necrostatin-1 rescued erianin-induced cell death,indicating that ferroptosis contributed to erianin-induced cell death.Furthermore,we demonstrated that Ca^(2+)/CaM signaling was a critical mediator of erianin-induced ferroptosis and that blockade of this signaling significantly rescued cell death induced by erianin treatment by suppressing ferroptosis.Taken together,our data suggest that the natural product erianin exerts its anticancer effects by inducing Ca^(2+)/CaMdependent ferroptosis and inhibiting cell migration,and erianin will hopefully serve as a prospective compound for lung cancer treatment.Peng Chen Qibiao Wu Jiao Feng Lili Yan Yitian Sun Shuiping Liu Yu Xiang Mingming Zhang Ting Pan Xiaying Chen Ting Duan Lijuan Zhai Bingtao Zhai Wengang Wang Ruonan Zhang Bi Chen Xuemeng Han Yicong Li Liuxi Chen Ying Liu Xingxing Huang Ting Jin Wenzheng Zhang Hong Luo Xiaohui Chen Yongqiang Li Qiujie Li Guohua Li Qin Zhang Lvjia Zhuo Zuyi Yang Huifen Tang Tian Xie Xiaoping Ouyang Xinbing Sui 2020Signal Transduction and Targeted Therapy2020,5,1:42
4Baicalin induces ferroptosis in bladder cancer cells by downregulating FTH1显示文摘Ferroptosis is a non-apoptotic regulated cell death caused by iron accumulation and subsequent lipid peroxidation.Currently,the therapeutic role of ferroptosis on cancer is gaining increasing interest.Baicalin an active component in Scutellaria baicalensis Georgi with anticancer potential various cancer types;however,the effects of baicalein on bladder cancer and the underlying molecular mechanisms remain largely unknown.In the study,we investigated the effect of baicalin on bladder cancer cells5637 and KU-19-19.As a result,we show baicalin exerted its anticancer activity by inducing apoptosis and cell death in bladder cancer cells.Subsequently,we for the first time demonstrate baicalin-induced ferroptotic cell death in vitro and in vivo,accompanied by reactive oxygen species(ROS) accumulation and intracellular chelate iron enrichment.The ferroptosis inhibitor deferoxamine but not necrostatin-1,chloroquine(CQ),N-acetyl-L-cysteine,L-glutathione reduced,or carbobenzoxy-valyl-alanyl-aspartyl-[O-methyl]-fluoromethylketone(Z-VAD-FMK) rescued baicalin-induced cell death,indicating ferroptosis contributed to baicalin-induced cell death.Mechanistically,we show that ferritin heavy chain1(FTH1) was a key determinant for baicalin-induced ferroptosis.Overexpression of FTH1 abrogated the anticancer effects of baicalin in both 5637 and KU19-19 cells.Taken together,our data for the first time suggest that the natural product baicalin exerts its anticancer activity by inducing FTH1-dependent ferroptosis,which will hopefully provide a prospective compound for bladder cancer treatment.Na Kong Xiaying Chen Jiao Feng Ting Duan Shuiping Liu Xueni Sun Peng Chen Ting Pan Lili Yan Ting Jin Yu Xiang Quan Gao Chengyong Wen Weirui Ma Wencheng Liu Mingming Zhang Zuyi Yang Wengang Wang Ruonan Zhang Bi Chen Tian Xie Xinbing Sui Wei Tao 2021Acta Pharmaceutica Sinica B2021,11,12:23
5Complement C3 activation regulates the production of tRNA-derived fragments Gly-tRFs and promotes alcohol-induced liver injury and steatosis显示文摘Complement is known to play a role in alcoholic fatty liver disease (AFLD), but the underlying mechanisms are poorly understood, thereby constraining the development of a rational approach for therapeutic intervention in the complement system. C3 deficiency has been shown to impart protective effects against ethanol-induced hepatic steatosis and inflammation. Here we demonstrate a protection effect in wild-type mice by treatment with CR2-Crry, a specific inhibitor of C3 activation. The expression of glycine transfer (t) RNA-derived fragments (Gly-tRFs) is upregulated in ethanol-fed mice and inhibition of Gly-tRFs in vivo decreases chronic ethanol feeding-induced hepatosteatosis without affecting inflammation. The expression of Gly-tRF was downregulated in C3-deficient or CR2-Crry-treated mice, but not in C5-deficient mice;Gly-tRF expression was restored by the C3 activation products C3a or Asp (C3a-des-Arg) via the regulation of CYP2E1. Transcriptome profiling of hepatic tissues showed that Gly-tRF inhibitors upregulate the expression of sirtuin1 (Sirt1) and subsequently affect downstream lipogenesis and β-oxidation pathways. Mechanistically, Gly-tRF interacts with AGO3 to downregulate Sirt1 expression via sequence complementarity in the 3′ UTR. Notably, the expression levels of C3d, CYP2E1 and Gly-tRF are upregulated, whereas Sirt1 is decreased in AFLD patients compared to healthy controls. Collectively, our findings suggest that C3 activation products contribute to hepatosteatosis by regulating the expression of Gly-tRF. Complement inhibition at the C3 activation step and treatment with Gly-tRF inhibitors may be potential and precise therapeutic approaches for AFLD.Fudi Zhong Zhigao Hu Keqing Jiang Biao Lei Zhan Wu Guandou Yuan Hongliang Luo Chunqiang Dong Bo Tang Chaowen Zheng Shuai Yang Yonglian Zeng Zhenya Guo Shuiping Yu Huizhao Su Guo Zhang Xiaoqiang Qiu Stephen Tomlinson Songqing He 2019Cell Research2019,29,7:14
6Atorvastatin attenuates involvement of RhoA/Rho-kinase pathway and NF-κB activation in hypoxic pulmonary hypertensive rats显示文摘Zhang Yan Dai Li Wu Shangjie Chen Ping Zhao Shuiping 2014Chinese Medical Journal2014,,5:12
7Short-term effects of drawing water for connectivity of rivers and lakes on zooplankton community structure显示文摘在期间 28 29, 2005 年 9 月,水在武汉经由桑焦·莱克和南泰齐·莱克从 Hanjiang 河和豪古安·莱克被拉到 Yangzi 河以便为生态系统恢复提供有利条件。评估作为生态系统恢复的一个工具拉水的可行性和有效性,浮游动物人口被学习 3 次(以前,立即在在绘画以后完成和一个月以后流水) 在到 2005 年 11 月 2 日的从 2005 年 9 月 27 日的七个地点。在湖的水质主要被改进,一旦绘画的水一个月在拉水以后完成了,但是增加,浮游动物种类丰富减少了。浮游动物密度和生物资源被拉水在湖减少,但是因为地形几何学变化,在桑焦·莱克的入口被增加。在拉水前,在桑焦·莱克例如的大多数种类, Brachionus sp。并且 Keratella sp。污染是容忍的。在画水象 Lecane 那样的寡营养容易的种类以后, ludwigii 和 Gastropus 猪圈 lifer 出现了。我们断定拉水能为改进水质和帮助生态系统恢复是重要的。滋养的集中的冲淡可以是在效果的一个重要角色。WU Zhenbin LIU Aifen ZHANG Shiyang CHENG Shuiping WU Xiaohui 2008Journal of Environmental Sciences2008,20,4:10
8The Survey of Birth Defects Rate Based on Birth Registration System显示文摘Min Yu Zhiguang Ping Shuiping Zhang Yuying He Rui Dong Xiong Guo 2015Chinese Medical Journal2015,,1:10
9Establishing Submersed Macrophytes via Sinking and Colonization of Shoot Fragments Clipped off Manually显示文摘In this paper,sinking and growth of apexes and mid-stems of Myriophyllum spicatum L.,Hydrilla verticillata (L.f.) Royle and Ceratophyllum demersum L. in concrete ponds containing eutrophic water and sediment were investigated. Sinking rates of apexes and mid-stems reached 34.8% and 4.4% at the 6 th day and 91.1% and 66.7% at the 22 nd day for M. spicatum,57.8% and 55.6% at the 6 th day and 100% and 97.8% at the 22 nd day for H. verticillata,18.9% and 86.7% at the 6 th day and 95.6% and 100% at the 22 nd day for C. demersum,respectively. Most sunken fragments established themselves successfully with significant growth. Total shoot length of plantlets developed from apexes and mid-stems increased by 399% and 61% for M. spicatum,593% and 256% for H. verticillata and 114% and 104% for C. demersum,respectively. The results showed that it was feasible to establish submersed macrophytes via sinking and colonization of shoot fragments clipped off manually.WU Zhenbin ZUO Jincheng MA Jianmin WU Juan CHENG Shuiping LIANG Wei 2007Wuhan University Journal of Natural Sciences2007,12,3:8
10Preparation, characterization, pharmacokinetics and anticancer effects of PEGylated β-elemene liposomes显示文摘Objective:This study aimed to develop a new polyethylene glycol(PEG)ylatedβ-elemene liposome(PEG-Lipo-β-E)and evaluate its characterization,pharmacokinetics,antitumor effects and safety in vitro and in vivo.Methods:The liposomes were prepared by ethanol injection and high-pressure micro-jet homogenization.Characterization of the liposomes was conducted,and drug content,entrapment efficiency(EE),in vitro release and stability were studied by ultra-fast liquid chromatography(UFLC)and a liquid surface method.Blood was drawn from rats to establish the pharmacokinetic parameters.The anticancer effect was evaluated in a KU-19-19 bladder cancer xenograft model.Histological analyses were performed to evaluate safety.Results:The PEG-Lipo-β-E showed good stability and was characterized as 83.31±0.181 nm in size,0.279±0.004 in polydispersity index(PDI),-21.4±1.06 mV in zeta potential,6.65±0.02 in pH,5.024±0.107 mg/mL inβ-elemene(β-E)content,and 95.53±1.712%in average EE.The Fourier transform infrared spectroscopy(FTIR)and differential scanning calorimetry(DSC)indicated the formation of PEG-Lipo-β-E.Compared to elemene injection,PEG-Lipo-β-E demonstrated a 1.75-fold decrease in clearance,a 1.62-fold increase in half-life,and a 1.76-fold increase in area under the concentration-time curves(AUCs)from 0 hour to 1.5 hours(P<0.05).PEG-Lipo-β-E also showed an enhanced anticancer effect in vivo.Histological analyses showed that there was no evidence of toxicity to the heart,kidney,liver,lung or spleen.Conclusions:The present study demonstrates PEG-Lipo-β-E as a new formulation with ease of preparation,high EE,good stability,improved bioavailability and antitumor effects.Bingtao Zhai Qibiao Wu Wengang Wang Mingming Zhang Xuemeng Han Qiujie Li Peng Chen Xiaying Chen Xingxing Huang Guohua Li Qin Zhang Ruonan Zhang Yu Xiang Shuiping Liu Ting Duan Jianshu Lou Tian Xie Xinbing Sui 2020Cancer Biology & Medicine2020,17,1:6
11An ATF24 peptide-functionalized β-elemene-nanostructured lipid carrier combined with cisplatin for bladder cancer treatment显示文摘Objective:In this study,we aimed to develop an amino-terminal fragment(ATF)peptide-targeted liposome carryingβ-elemene(ATF24-PEG-Lipo-β-E)for targeted delivery into urokinase plasminogen activator receptor-overexpressing bladder cancer cells combined with cisplatin(DDP)for bladder cancer treatment.Methods:The liposomes were prepared by ethanol injection and high-pressure microjet homogenization.The liposomes were characterized,and the drug content,entrapment efficiency,andin vitro release were studied.The targeting efficiency was investigated using confocal microscopy,ultra-fast liquid chromatography,and an orthotopic bladder cancer model.The effects of ATF24-PEG-Lipo-β-E combined with DDP on cell viability and proliferation were evaluated by a Cell Counting Kit-8(CCK-8)assay,a colony formation assay,and cell apoptosis and cell cycle analyses.The anticancer effects were evaluated in a KU-19-19 bladder cancer xenograft model.Results:ATF24-PEG-Lipo-β-E had small and uniform sizes(~79 nm),high drug loading capacity(~5.24 mg/mL),high entrapment efficiency(98.37±0.95%),and exhibited sustained drug release behavior.ATF24-PEG-Lipo-β-E had better targeting efficiency and higher cytotoxicity than polyethylene glycol(PEG)ylatedβ-elemene liposomes(PEG-Lipo-β-E).DDP,combined with ATF24-PEG-Lipo-β-E,exerted a synergistic effect on cellular apoptosis and cell arrest at the G2/M phase,and these effects were dependent on the caspase-dependent pathway and Cdc25C/Cdc2/cyclin B1 pathways.Furthermore,thein vivo antitumor activity showed that the targeted liposomes effectively inhibited the growth of tumors,using the combined strategy.Conclusions:The present study provided an effective strategy for the targeted delivery ofβ-elemene(β-E)to bladder cancer,and a combined strategy for bladder cancer treatment.Bingtao Zhai Peng Chen Wengang Wang Shuiping Liu Jiao Feng Ting Duan Yu Xiang Ruonan Zhang Mingming Zhang Xuemeng Han Xiaying Chen Qiujie Li Guohua Li Ying Liu Xingxing Huang Wenzheng Zhang Ting Pan Lili Yan Ting Jin Tian Xie Xinbing Sui 2020Cancer Biology & Medicine2020,17,3:5
12Diurnal variation of nitrated polycyclic aromatic hydrocarbons in PM_(10) at a roadside site in Xiamen,China显示文摘Intensive daytime and nighttime sampling was carried out from 23 Oct to 31 Dec 2008 to investigate the occurrence of nitrated polycyclic aromatic hydrocarbons(NPAHs) in PM 10 at a roadside site in Xiamen,China.At the same time,six PM 10 samples were collected from a nearby roadway tunnel for comparison.Six NPAHs,namely 9-nitroanthracene,2-and 3-nitrofluoranthene,1nitropyrene,7-nitrobenz[a]anthracene,and 6-nitrobenzo[a]pyrene,were identified and quantified using GC/MS in negative ion chemical ionization mode.The average total concentration of six NPAHs(∑ NPAHs) in the cold season(26 Nov-31 Dec) was 2.3(daytime) and 9.9(nighttime) times higher than those in the warm season.Significant statistical difference(p < 0.01,2-tailed) of ∑ NPAHs between daytime and nighttime was found during both the warm and cold seasons.NPAHs were significantly positively correlated with their parent PAHs and nitrogen dioxide but negatively correlated with ambient temperature.The ratio of 2 + 3-nitrofluoranthene to 1nitropyrene exhibited a similar diurnal pattern as ∑ NPAHs and was generally greater than 5,indicating the importance of secondary atmospheric formation.The diurnal variations of NPAHs were all influenced by the diurnal variations of PAHs,nitrogen dioxide,sunlight,and temperature.The daily inhalable exposure to the six NPAHs in the tunnel was much higher than the roadside values in the warm season but only slightly higher than those in the cold season.Shuiping Wu Bingyu Yang Xinhong Wang Huasheng Hong Chungshin Yuan 2012Journal of Environmental Sciences2012,24,10:5
13Application of Constructed Wetlands on Wastewater Treatment for Aquaculture Ponds显示文摘A group of constructed wetlands (CWs) were applied to the recir-culating aquaculture system. This study assessed the performance of CWs in treating the aquaculture wastewater, examined the water quality condition of aquaculture ponds and the growth and the survival rate of 'target' species (Ictalurus punctatus and Megalobrama amblycephala). The results showed that CWs were effective on reducing the concentrations of 5-day biochemical oxygen demand (BOD5, at 70.5%), total suspended solids (TSS, at 81.9%), chlorophyll a (Chl-a, at 91.9%), ammonium (NH4+, at 61.5%) and nitrate nitro-gen (NO3--N, at 68.0%). Effect of CWs on phosphate (PO43--P) removal was relatively lower (at 20.0%). The concentrations of BOD5, TSS, Chl-a, NH4+ and TN, TP in the recirculating culture pond were significantly lower than that in the control pond( p0.05∧). CWs could help to increase total yield, survival rate of the 'target' species and significantly decrease feed conversion ratio ( p0.05∧).LI Gu WU Zhenbin CHENG Shuiping LIANG Wei HE Feng FU Guiping ZHONG Fei 2007Wuhan University Journal of Natural Sciences2007,12,6:5
14MATHEMATICAL MODEL FOR CONTINUOUS DETECTION OF CURRENT EFFICIENCY IN ALUMINUM PRODUCTION显示文摘INTRODUCTIONThemathematicalmodelsforcalculationofcurenteficiencyinaluminareductionhavebenreportedbymanyinvestigators,mostofwh...Zeng Shuiping Institute of Fuzzy Control, North China University of Technology, Beijing 100041, P. R. China Liu Yexiang and Mei Chi Department of Nonferrous Metallurgy, Central South University of Technology, Changsha 410083, P. R. China 1998中国有色金属学会会刊:英文版1998,8,4:5
15Nrf2 is associated with the regulation of basal transcription activity of the BRCA1 gene显示文摘BRCA1 是仔细与乳癌的致病有关。BRCA1 倡导者的活动被 transcriptional 因素调整。抄写因素 Nrf2 (原子 factor-erythroid-2p45-related 因素 2 ) 是有势力 transcriptional 使活跃之物并且在许多 cytoprotective 基因的可诱导的表示起一个中央作用。在这份报告,我们发现 Nrf2 的在表示上刺激了 BRCA1 表示, Nrf2 击倒稀释 BRCA1 表示。Nrf2 也与 CBP 和 p300 交往了形成活跃抄写建筑群,它能在 BRCA1 倡导者上把地点绑在 ARE (抗氧化剂反应元素) 并且由导致 histone acetylation 激活它的抄写。我们发现能导致乳癌的发展的更好的理解。Qiaoqiao wang Jiyu Li Xinmiao Yang Hefen Sun Shuiping Gao Hua Zhu Jiong Wu Wei Jin 2013Acta Biochimica et Biophysica Sinica2013,45,3:5
16Bacterial diversity in activated sludge from a consecutively aerated submerged membrane bioreactor treating domestic wastewater显示文摘The bacterial diversity of activated sludge from submerged membrane bioreactor (SMBR) was investigated. A 16S rDNA clone library was generated, and 150 clones were screened using restriction fragment length polymorphism (RFLP). Of the screened clones, almost full-length 16S rDNA sequences of 64 clones were sequenced. Phylogenetic tree was constructed with a database containing clone sequences from this study and bacterial rDNA sequences from NCBI for identification purposes. The 90.6% of the clones were a?liated with the two phyla Bacteroidetes (50%) and Proteobacteria (40%), and β-, γ-, and δ-Proteobacteria accounted for 7.8%, 28.1%, and 4.7%, respectively. Minor portions were a?liated with the Actinobacteria and Firmicutes (both 3.1%). Only 6 out of 64 16S rDNA sequences exhibited similarities of more than 97% to classified bacterial species, which indicated that a substantial fraction of the clone sequences were derived from unknown taxa. Rarefaction analysis of operational taxonomic units (OTUs) clusters demonstrated that 150 clones screened were still insu?cient to describe the whole bacterial diversity. Measurement of water quality parameter demonstrated that performance of the SMBR maintained high level, and the SMBR system remained stable during this study.DU, Cheng WU, Zhenbin XIAO, Enrong ZHOU, Qiaohong CHENG, Shuiping LIANG, Wei HE, Feng 2008Journal of Environmental Sciences2008,20,10:5
17PCDH17 increases the sensitivity of colorectal cancer to 5-fluorouracil treatment by inducing apoptosis and autophagic cell death显示文摘5-Fluorouracil(5-FU)is known as a first-line chemotherapeutic agent against colorectal cancer(CRC),but drug resistance occurs frequently and significantly limits its clinical success.Our previous study showed that the protocadherin 17(PCDH17)gene was frequently methylated and functioned as a tumor suppressor in CRC.However,the relationship between PCDH17 and 5-FU resistance in CRC remains unclear.Here,we revealed that PCDH17 was more highly expressed in 5-FU-sensitive CRC tissues than in 5-FU-resistant CRC tissues,and high expression of PCDH17 was correlated with high BECN1 expression.Moreover,this expression profile contributed to superior prognosis and increased survival in CRC patients.Restoring PCDH17 expression augmented the 5-FU sensitivity of CRC in vitro and in vivo by promoting apoptosis and autophagic cell death.Furthermore,autophagy played a dominant role in PCDH17-induced cell death,as an autophagy inhibitor blocked cell death to a greater extent than the pancaspase inhibitor Z-VAD-FMK.PCDH17 inhibition by siRNA decreased the autophagy response and 5-FU sensitivity.Mechanistically,we showed that c-Jun NH2-terminal kinase(JNK)activation was a key determinant in PCDH17-induced autophagy.The compound SP600125,an inhibitor of JNK,suppressed autophagy and 5-FU-induced cell death in PCDH17-reexpressing CRC cells.Taken together,our findings suggest for the first time that PCDH17 increases the sensitivity of CRC to 5-FU treatment by inducing apoptosis and JNK-dependent autophagic cell death.PCDH17 may be a potential prognostic marker for predicting 5-FU sensitivity in CRC patients.Shuiping Liu Haoming Lin Da Wang Qiang Li Hong Luo Guoxiong Li Xiaohui Chen Yongqiang Li Peng Chen Bingtao Zhai Wengang Wang Ruonan Zhang Bi Chen Mingming Zhang Xuemeng Han Qiujie Li Liuxi Chen Ying Liu Xiaying Chen Guohua Li Yu Xiang Ting Duan Jiao Feng Jianshu Lou Xingxing Huang Qin Zhang Ting Pan Lili Yan Ting Jin Wenzheng Zhang Lvjia Zhuo Yitian Sun Tian Xie Xinbing Sui 2019Signal Transduction and Targeted Therapy2019,4,1:4
18Heavy metal pollution in China: Origin, pattern and control显示文摘Shuiping Cheng 2003Environmental Science and Pollution Research2003,,3:3
19Simultaneous formation of trimetallic Pt-Ni-Cu excavated rhombic dodecahedrons with enhanced catalytic performance for the methanol oxidation reaction显示文摘有挖掘结构的 Multimetallic 基于磅的合金由于他们的组合、词法的 tunability,高特定的表面区域,和出色的电镀物品催化的活动吸引了大兴趣。此处,我们报导 trimetallic Pt-Ni-Cu 的第一灵巧的一个壶合成高度与接近 100% 的收益挖掘了菱形的十二面体(ERD ) 。更重要地,这些高度一致的 nanocrystals 有三在尺寸上的可存取的挖掘表面,在丰富的走的原子被观察的地方。得益于高度挖掘的菱形的十二面体组织,电子并且在 trimetallic 合金以内的 synergistic 效果,和丰富的走的原子,同样准备的 trimetallic Pt-Ni-Cu ERD 与商业 Pt/C 和二金属的 Pt-Cu ERD 和 Pt-Ni-Cu 稳固的菱形的十二面体相比为甲醇的电镀物品氧化展出提高的电镀物品催化的表演稳固的菱形的十二面体( SRD )。Min Tang Shuiping Luo Kai Wang Hongyu Du Rinrada Sriphathoorat Peikang Shen 2018Nano Research2018,11,9:3
20茂金属催化剂催化苯乙烯间规聚合 Ⅰ.Cp Ti(CH_2SiMe_3)_3/B(C_6F_5)_3催化体系显示文摘考察了新型催化剂Cp*Ti(CH2SiMe3)3/B(C6F5)3催化苯乙烯间规聚合的性能.结果表明,Cp*Ti(CH2SiMe3)3与B(C6F5)3等摩尔混合可形成高活性的催化剂,催化活性高达(0.7~1.37)×107g/(mol2·h),聚苯乙烯的间规度为95%以上.B(C6F5)3/Ti摩尔比不等于1时,其催化活性和间规立构选择性都明显降低.Al(i-Bu)3的加入不仅显著提高催化活性和间规立构选择性,而且还提高了间规聚苯乙烯的相对分子量.最佳聚合温度为343K.在c(St)=0.44~6.56mol/L范围内,苯乙烯聚合速率对苯乙烯单体呈一级反应,苯乙烯转化率和间规聚苯乙烯的相对分子量随反应时间的增加而提高.Xu Guangxue, Liu Shuiping, Lin Shang′an(Institute of Polymer Science, Zhongshan University, Guangzhou 510275) 1998催化学报1998,19,3:3
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