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71篇 您的检索式:作者名="Taotao LIU"
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1Ascorbic acid enhances the cardiac differentiation of induced pluripotent stem cells through promoting the proliferation of cardiac progenitor cells显示文摘导致的 pluripotent 干细胞(iPSCs ) 的产生为心疾病,屏蔽的药和潜在的自体同源的心脏的新生的调查打开了新大街。然而,他们的申请被导出 iPSC 的 cardiomyocytes (iPS 厘米) 的低效的心脏的区别,高写在行间可变性,和差的成熟妨碍。为 iPSCs 的心脏的区别和成熟识别有效 inducers 并且阐明机制,我们系统地在各种各样的鼠科的(m) iPSCs 上屏蔽了十六 cardiomyocyte inducers 并且发现没有自发的心脏性的潜力,仅仅维生素酸(AA ) 一致地并且要用体力地包括八提高了十一根线的心脏的区别。我们然后优化了治疗条件并且表明了那区别天 2-6,为心脏的祖先房间(CPC ) 的说明的经期,是一批评时间让 AA 生效。这被 AA 增加了表示的事实进一步证实心血管然而并非 mesodermal 标记。显著, AA 处理导致了近似 7.3 褶层(miPSCs ) 和 30.2 褶层(人的 iPSCs ) 在 iPS 厘米的收益扩充。如此的效果经由 MEK-ERK1/2 小径被归因于 CPC 的增长的特定的增加由通过支持骨胶原合成。另外,导致 AA 的 cardiomyocytes 显示出更好的 sarcomeric 组织并且提高了行动潜力和钙 transients 的回答到 β肾上腺素能并且 muscarinic 刺激。这些调查结果证明 AA 是合适的 cardiomyocyte inducer 让 iPSCs 普遍,简单地改进心脏的区别和成熟。这些调查结果也强调由在指导 pluripotent 干细胞的心脏的区别操作细胞外的微型环境刺激 CPC 增长的重要性。Nan Cao Zumei Liu Zhongyan Chen Jia Wang Taotao Chen Xiaoyang Zhao Yu Ma Lianju Qin Jiuhong Kang Bin Wei Liu Wang Ying Jin Huang-Tian Yang 2012Cell Research2012,22,1:28
2Yamanaka factors critically regulate the developmental signaling network in mouse embryonic stem cells显示文摘Yamanaka 因素(Oct3/4, Sox2, Klf4, c-Myc ) 高度在胚胎的茎(ES ) 被表示房间,和他们的在表示上能在老鼠和人的体的房间导致 pluripotency,显示这些因素调整为 ES 房间 pluripotency 必要的发展发信号网络。然而,发信号的小径的全身的分析由 Yamanaka 因素调整了充分还没被描述了。在这研究,我们鉴别一个整个染色体上的内长的 Yamanaka 因素的目标倡导者在 E14.1 鼠标 ES 房间用薄片(染色质 immunoprecipitation ) 放大 -on-chip,并且我们发现这四个因素共同占据 58 个倡导者。有趣地,当 Oct4 和 Sox2 作为核心因素被分析时, Klf4 工作了为发展规定提高核心因素,而 c-Myc 似乎在调整新陈代谢起一个不同作用。小径分析表明 Yamanaka 因素一起调整由 16 条发展发信号小径,其九条在 ES 房间代表更早未知的小径组成的一个发展发信号网络,包括 apoptosis 和房间周期小径。我们进一步从在老鼠 ES 房间检验 Yamanaka 因素的最近的研究分析了数据。有趣地,这分析也揭示了 16 条发展发信号小径, 14 条小径重叠,由这研究揭示了,尽管有目标基因和发信号的小径由每个单个 Yamanaka 因素调整了在这二数据集之间显著地不同。我们建议 Yamanaka 因素极其调整由约十二条关键发展发信号小径组成也维持 ES 房间并且可能的 pluripotency 导致 pluripotent 干细胞的一个发展发信号网络。Xiaosong Liu Jinyan Huang Taotao Chen Ying Wang Shunmei Xin Jian Li Gang Pei Jiuhong Kang 2008Cell Research2008,18,12:6
3Neurological manifestations of patients with COVID-19:potential routes of SARS-CoV-2 neuroinvasion from the periphery to the brain显示文摘Coronavirus disease 2019(COVID-19),caused by severe acute respiratory syndrome coronavirus 2(SARS-CoV-2),has caused a global pandemic in only 3 months.In addition to major respiratory distress,characteristic neurological manifestations are also described,indicating that SARS-CoV-2 may be an underestimated opportunistic pathogen of the brain.Based on previous studies of neuroinvasive human respiratory coronaviruses,it is proposed that after physical contact with the nasal mucosa,laryngopharynx,trachea,lower respiratory tract,alveoli epithelium,or gastrointestinal mucosa,SARS-CoV-2 can induce intrinsic and innate immune responses in the host involving increased cytokine release,tissue damage,and high neurosusceptibility to COVID-19,especially in the hypoxic conditions caused by lung injury.In some immunecompromised individuals,the virus may invade the brain through multiple routes,such as the vasculature and peripheral nerves.Therefore,in addition to drug treatments,such as pharmaceuticals and traditional Chinese medicine,non-pharmaceutical precautions,including facemasks and hand hygiene,are critically important.Zhengqian Li Taotao Liu Ning Yang Dengyang Han Xinning Mi Yue Li Kaixi Liu Alain Vuylsteke Hongbing Xiang Xiangyang Guo 2020Frontiers of Medicine2020,14,5:5
4Effects of different acupuncture manipulations on protein expression in the parietal cortex of spontaneously hypertensive rats显示文摘Objective: To analyze the effects of twirling reinforcing and reducing manipulations on protein expression in parietal cortex of spontaneously hypertensive rats(SHRs), and elucidate the main mechanisms and differences between two manipulations in hypertension treatment.Methods: Rats were randomly divided into the control, model, twirling reinforcing manipulation(TRFM),and twirling reducing manipulation(TRDM) groups. The control and model groups received catch and fixation stimulations once a day for 14 days. The TRFM and TRDM groups were intervened once a day for 20 min for 14 days. On days 0, 2, 6, 10, and 14 after acupuncture, rat systolic blood pressures(SBPs) were measured. Differential protein(DP) expression in the rat parietal cortices was detected. Thereafter, GO functional significance and KEGG pathway enrichment analyses were performed.Results: Compared with the model group, SBP of rats in the TRDM and TRFM groups decreased on days 6 and 10 of acupuncture, respectively(P=.009;P <.001). Moreover, SBP of the TRDM group was significantly lower than that of the TRFM group on days 10 and 14 of acupuncture(P=.015;P=.013).Compared with control group, 601 and 1040 DPs were up-and downregulated, respectively, in the model group. Compared with model group, 44 and 28 up-and downregulated DPs were expressed, respectively,in the TRFM group. Compared with model group, expression of 616 and 427 up-and downregulated DPs,respectively, was found in the TRDM group. After combining the results of GO and KEGG enrichment analyses, five and one pathways were found to be related to the central antihypertensive mechanism of the parietal cortex during twirling reducing and reinforcing manipulations, respectively.Conclusion: TRDM showed a more effective antihypertensive effect on SHRs than TRFM;this antihypertensive effect was related to the regulation of different proteins and their biological functions.Jiaojuan Wu Tianxiao Zeng Jingrong Liang Xudong Zhang Qi Xie Taotao Lv Pui Yee Wong Zhi Ji Qingguo Liu 2021Journal of Traditional Chinese Medical Sciences2021,8,3:4
5More synergetic cooperation of Yamanaka factors in induced pluripotent stem cells than in embryonic stem cells显示文摘在 pluripotency 的正式就职的核心管理者最近在体的房间 reprogramming 期间被发现了的 Yamanaka 因素的角色。我们的以前的学习发现 Yamanaka 因素在维持胚胎的茎(ES ) 房间 pluripotency 调整一个发展发信号网络。这里,我们完全证实 reprogrammed 导致了 pluripotent 茎(iPS ) 细胞并且由薄片薄片试金在这些细胞分析了 Yamanaka 因素的全球倡导者占有。我们发现 565 基因的倡导者是由在 iPS 房间的四个 Yamanaka 因素的合作界限, 10 褶层增加什么时候与他们在 ES 房间的绑定相比。,在 ES 房间 Oct4, Sox2,或 Klf4 在 iPS 房间在激活并且镇压的基因同等地散布的一个单个 Yamanaka 因素占据的倡导者在激活的主要在镇压基因和 c-Myc 散布了。薄片薄片数据的小径分析表明 Yamanaka 因素在 iPS 房间, 12 在之中是普通的调整了 16 条发展发信号小径, 4 与在 ES 房间调整的小径相比是唯一的。我们进一步在 iPS 房间分析了另一最近出版的薄片薄片数据集并且观察了类似的结果,显示出为揭示 pluripotency 维护和新生的性质的薄片薄片正小径分析的力量。下次,我们试验性地测试了压抑的发信号小径之一并且发现它的抑制确实改进了房间 reprogramming 的效率。一起拿,我们建议有一个核心为 pluripotency 必要的发展发信号网络与 TGF- ,刺猬, Wnt,是的 p53 压抑(殷) 管理者和 Jak-STAT,房间周期,焦点的粘附, adherens 连接作为活跃(杨) ;并且 Yamanaka 因素 synergistically 在 Yin-Yang 调整他们导致 pluripotency 的平衡方法。Jinyan Huang Taotao Chen Xiaosong Liu Jing Jian Jinsong Li Dangsheng Li X Shirley Liu Wei Li Jiuhong Kang Gang Pei 2009Cell Research2009,19,10:4
6Microwave-assisted hydroxylation of benzene to phenol with H_2O_2 over FeSO_4/SiO_2显示文摘Hydroxyl radicals HO are generated under Fenton-like (Fe2++H2O2→HO?+OH?+Fe3+) catalytic conditions upon microwave irradiation. Liquid-phase direct catalytic oxidation of benzene to phenol was obtained using FeSO4 supported on silica gel as a solid catalyst and hydrogen peroxide as the oxidant. The effects of various parameters, such as the different solvents, the amount of solvent used, the amount of catalyst used, the reaction time, the reaction temperature and the amount of hydrogen peroxide used on the yield of phenol were studied to identify optimum reaction conditions. Conventionally heated reaction gives a phenol yield of 0.6%. A higher phenol yield of 13.9% with a selectivity of 100% is obtained when the reaction mixture was irradiated with micro-wave energy. It is concluded that microwave irradiation offers more effective control of energy input for hydroxyl radical generation that is appropriate for various synthetic reactions.LIU Tong WEI Xianyong ZHAO Jianjun XIE Hengsen WANG Taotao ZONG Zhimin 2010Mining Science and Technology2010,20,1:4
7Fusaricidins in Paenibacillus polymyxa A21 and their antagonistic activity against Botrytis cinerea on tomato显示文摘Four kinds of antifungal compounds from an extract of Paenibacillus polymyxa A21 with molecular masses of 883.56, 897.59, 947.55, and 961.58 Da were characterized as the members of fusaricidin-type of antibiotics according to LC-MS analysis. Fusaricidins isolated from culture filtrate displayed high antagonistic activity against several plant fungal pathogens, especially Botrytis cinerea, the causal agent of gray mold. The fusaricidins biosynthetic gene cluster(BGC) from A21 was cloned by PCR and comparative cluster analysis revealed that gene fus TE, the 3′ boundary of the fusaricidin BGC in strain PKB1, was not present in fusaricidin BGC of A21, indicating that fus TE is not necessary for fusaricidin synthesis. Fusaricidin extract from A21 significantly reduced gray mold disease incidence and severity on tomato. The m RNA levels for three pathogenesis-related proteins(PRs) revealed that treatment of tomato leaves with fusaricidin extract induced the expression of PR genes to different levels, suggesting that one reason for the reduction of gray mold infection by fusaricidin is induction of PR proteins, which lead to increased resistance to pathogens. This is the first report of the application of fusaricidins to control tomato gray mold and the comparative cluster analysis provides important molecular basis for research on fusaricidin biosynthesis.Weicheng LIU Xiaoli WU Xuelian BAI Hong ZHANG Dan DONG Taotao ZHANG Huiling WU 2018Frontiers of Agricultural Science and Engineering2018,5,2:4
8Selection of a DNA aptamer for the development of fluorescent aptasensor for carbaryl detection显示文摘An improved ssDNA library immobilized systematic evolution of ligands by enrichment(SELEX)was applied to select aptamers against carbaryl.After nine selection rounds,a highly enriched ssDNA pool was obtained.The Apta3 was demonstrated as the optimal aptame r.In order to facilitate the modification of aptamer,the Apta3 was further truncated with the dissociation constant(K_(d))of 0.364±0.055μmol/L and a fluorescent aptasensor was developed.The linear range for carbaryl was from 100 nmol/L to1500 nmol/L,with the limit of detection was as low as 15.23 nmol/L.Besides,the biosensor was validated for the carbaryl spiked real samples,and the recoveries were between 97.7%and 107.3%.Yuan Liu Gaojian Yang Taotao Li Yan Deng Zhu Chen Nongyue He 2021Chinese Chemical Letters2021,32,6:3
9Electrochemical sensor for Cd2+ and Pb2+ detection based on nano-porous pseudo carbon paste electrode显示文摘An electrochemical sensor based on self-made nano-porous pseudo carbon paste electrode(nano-PPCPE)has been successfully developed,and used to detect Cd^2+ and Pb^2+.The experimental results showed that the electrochemical performance of nanoPPCPE is evidently better than both glassy carbon electrode(GCE)and pure carbon paste electrode(CPE).Then the prepared nano-PPCPE was applied to detect Cd^2+ and Pb^2+in standard solution,the results showed that the electrodes can quantitatively detect trace Cd^2+ and Pb^2+,which has great significance in electrochemical analysis and detection.The linear ranges between the target ions concentration and the D PASV current were from 0.1-3.0 μmol/L,0.05-4.0 μmol/L for Cd^2+ and Pb^2+,respectively.And the detection limits were 0.0780 μmol/L and 0.0292 μmol/L,respectively.Moreover,the preparation of the nano-PPCPE is cheap,simple and has important practical value.Yuan Liu Taotao Li Chuxuan Ling Zhu Chen Yan Deng Nongyue He 2019Chinese Chemical Letters2019,30,12:3
10Performance enhancement of paper-based SERS chips by shell-isolated nanoparticle-enhanced Raman spectroscopy显示文摘Paper-based flexible surface-enhanced Raman scattering(SERS) chips have been demonstrated to have great potential for future practical applications in point-of-care testing(POCT) due to the potentials of massive fabrication, low cost, efficient sample collection and short signal acquisition time. In this work,common filter paper and Ag@Si O2 core-shell nanoparticles(NP) have been utilized to fabricate SERS chips based on shell-isolated nanoparticle-enhanced Raman spectroscopy(SHINERS). The SERS performance of the chips for POCT applications was systematically investigated. We used crystal violet as the model molecule to study the influence of the size of the Ag core and the thickness of the Si O2 coating layer on the SERS activity and then the morphology optimized Ag@Si O2 core-shell NPs was employed to detect thiram. By utilizing the smartphone as a miniaturized Raman spectral analyzer, high SERS sensitivity of thiram with a detection limit of 10^-9 M was obtained. The study on the stability of the SERS chips shows that a Si O2 shell of 3 nm can effectively protect the as-prepared SERS chips against oxidation in ambient atmosphere without seriously weakening the SERS sensitivity. Our results indicated that the SERS chips by SHINERS had great potential of practical application, such as pesticide residues detection in POCT.Mingze Sun Binghan Li Xiaojia Liu Jiayin Chen Taotao Mu Lianqing Zhu Jinhong Guo Xing Ma 2019Journal of Materials Science & Technology2019,35,10:3
11Regional Metabolic Patterns of Abnormal Postoperative Behavioral Performance in Aged Mice Assessed by XH-NMR Dynamic Mapping Method显示文摘Abnormal postoperative neurobehavioral performance(APNP)is a common phenomenon in the early postoperative period.The disturbed homeostatic status of metabolites in the brain after anesthesia and surgery might make a significant contribution to APNP.The dynamic changes of metabolites in different brain regions after anesthesia and surgery,as well as their potential association with APNP are still not well understood.Here,we used a battery of behavioral tests to assess the effects of laparotomy under isoflurane anesthesia in aged mice,and investigated the metabolites in 12 different sub-regions of the brain at different time points using proton nuclear magnetic resonance('H-NMR)spectroscopy.The abnormal neurobehavioral performance occurred at 6 h and/or 9 h,and recovered at 24 h after anesthesia/surgery.Compared with the control group,the altered metabolite of the model group at 6 h was aspartate(Asp),and the difference was mainly displayed in the cortex;while significant changes at 9 h occurred predominantly in the cortex and hippocampus,and the corresponding metabolites were Asp and glutamate(Glu).All changes returned to baseline at 24 h.The altered metabolic changes could have occurred as a result of the acute APNP,and the metabolites Asp and Glu in the cortex and hippocampus could provide preliminary evidence for understanding the APNP process.Taotao Liu Zhengqian Li Jindan He Ning Yang Dengyang Han Yue Li Xuebi Tian Huili Liu Anne Manyande Hongbing Xiang Fuqiang Xu Jie Wang Xiangyang Guo 2020Neuroscience Bulletin2020,36,1:2
12Genome-wide analyses on transcription factors and their potential microRNA regulators involved in maize male fertility显示文摘Anther development is a programmed biological process crucial to plant male reproduction. Genomewide analyses on the functions of transcriptional factor(TF) genes and their microRNA(miRNA) regulators contributing to anther development have not been comprehensively performed in maize. Here, using published RNA-Seq and small RNA-Seq(sRNA-Seq) data from maize anthers at ten developmental stages in three genic male-sterility(GMS) mutants(ocl4, mac1, and ms23) and wild type W23, as well as newly sequenced maize anther transcriptomes of ms7-6007 and lob30 GMS mutants and their WT lines, we analyzed and found 1079 stage-differentially expressed(stage-DE) TF genes that can be grouped into six(premeiotic, meiotic, postmeiotic, premeiotic-meiotic, premeiotic-postmeiotic, and meiotic-postmeiotic clusters) expression clusters. Functional enrichment combined with cytological and physiological analyses revealed specific functions of genes in each expression cluster. In addition, 118 stage-DE miRNAs and99 miRNA-TF gene pairs were identified in maize anthers. Further analyses revealed the regulatory roles of zma-miR319 and zma-miR159 as well as ZmMs7 and ZmLOB30 on ZmGAMYB expression. Moreover,ZmGAMYB and its paralog ZmGAMYB-2 were demonstrated as novel maize GMS genes by CRISPR/Cas9 knockout analysis. These results extend our understanding on the functions of miRNA-TF gene regulatory pairs and GMS TF genes contributing to male fertility in plants.Ziwen Li Taotao Zhu Shuangshuang Liu Yilin Jiang Haoyun Liu Yuwen Zhang Ke Xie Jinping Li Xueli An Xiangyuan Wan 2021The Crop Journal2021,9,6:2
13Numerical analysis on propulsive efficiency and pre-deformated optimization of a composite marine propeller显示文摘The objectives of this paper are to numerically investigate the performance of a composite propeller through bidirectional FSI algorithm combining CFD and FEM,and to improve its propulsive efficiency by a pre-deformated method. Numerical results are presented for the composite propeller which has been modeled by unidirectionally stacking with glass-fiber reinforced composites. The propulsive efficiency of the composite and rigid propellers with different advance coefficients J has been compared.The results show that the efficiency of the composite propeller is obviously higher than that of the rigid propeller when J≤0.8,which is attributed to the decrease of pitch angle caused by the bend-twist coupling effects. But for the design condition J=0.851 and the cases with J>0.851,the efficiency of the composite propeller is significantly lower than that of the rigid propeller,which is because the angle of attack αcomposite is deviated from the optimal angle of attack αdesign more than that for the rigid case αrigid.Based on the optimization by the proposed pre-deformated method,the efficiency improvement of the composite propeller at the conditions with J≥0.851 could be obtained,and the composite material used in this work can meet the strength requirement of the designed propellers.ZHANG Jing WU Qin WANG GuoYu LIU TaoTao 2020Science China(Technological Sciences)2020,63,12:2
14The optimization of hydrothermal process of MoS2 nanosheets and their good microwave absorption performances显示文摘In this study,flower-like MoS2 constructed by nanosheets was synthesized by a simple hydrothermal method.The hydrothermal process was optimized and the effects of hydrothermal condition,including reaction temperature,reaction time and the ratio of Mo source to S source(Mo:S)in precursor,on microwave absorption performances and dielectric properties were investigated.Our results showed that when the reaction temperature was 180℃,the reaction time was 18 h,and the Mo:S was 1:3.5,the synthesized MoS2 had the best performance:Its minimum reflection loss could reach-55.78 dB,and the corresponding matching thickness was 2.30 mm with a wide effective bandwidth of 5.17 GHz.Further researches on the microwave absorption mechanism revealed that in addition to the destructive interference of electromagnetic waves,various polarization phenomena such as defect dipole polarization were the main reasons for microwave loss.We believe that MoS2 is a candidate for a practical microwave absorbent.Xiaoyu Lin Jing Wang Zengyong Chu Dongqing Liu Taotao Guo Lingni Yang Zhenyu Huang Sitong Mu Shun Li 2020Chinese Chemical Letters2020,31,5:2
15Global cavitation patterns and corresponding hydrodynamics of the hydrofoil with leading edge roughness显示文摘The objective of this paper is to experimentally investigate the cavitation patterns and corresponding hydrodynamics of the hydrofoil with leading edge roughness.The aims are to(1)understand the effect of the leading edge roughness on the hydrodynamic performance,and(2)have a good knowledge of the interaction between the leading edge roughness and the cavitation patterns.Experimental results are indicated for the NACA 66 hydrofoils with and without leading edge roughness at different incidence angles for sub and cavitation conditions.The experiments are conducted in the EPFL high-speed cavitation tunnel(Avellan 2015).The results showed that the leading edge roughness has a significant effect on the hydrodynamic performance at the sub cavitation,suppressing the formation of the incipient cavitation.The lift coefficient of the hydrofoil without leading edge roughness is larger than that of the hydrofoil with leading edge roughness,while for the drag coefficients,the results are contrary for the lift coefficient,and the maximum lift-to-drag ratio angle is delayed for the hydrofoil with leading edge roughness.The leading edge roughness modified the local pressure distribution at the leading edge region,which in turn significantly increased the minimum pressure coefficient,hence the incipient cavitation number of the hydrofoil with leading edge roughness.The formation and evolution of the transient cavity for the cloud cavitation is little affected by the leading edge roughness.Qian Chen Yunqing Liu Qin Wu Yong Wang Taotao Liu Guoyu Wang 2020Acta Mechanica Sinica2020,36,6:2
16Three-Dimensional Measurement Using Structured Light Based on Deep Learning显示文摘Three-dimensional(3D)reconstruction using structured light projection has the characteristics of non-contact,high precision,easy operation,and strong real-time performance.However,for actual measurement,projection modulated images are disturbed by electronic noise or other interference,which reduces the precision of the measurement system.To solve this problem,a 3D measurement algorithm of structured light based on deep learning is proposed.The end-to-end multi-convolution neural network model is designed to separately extract the coarse-and fine-layer features of a 3D image.The point-cloud model is obtained by nonlinear regression.The weighting coefficient loss function is introduced to the multi-convolution neural network,and the point-cloud data are continuously optimized to obtain the 3D reconstruction model.To verify the effectiveness of the method,image datasets of different 3D gypsum models were collected,trained,and tested using the above method.Experimental results show that the algorithm effectively eliminates external light environmental interference,avoids the influence of object shape,and achieves higher stability and precision.The proposed method is proved to be effective for regular objects.Tao Zhang Jinxing Niu Shuo Liu Taotao Pan Brij B.Gupta 2021Computer Systems Science & Engineering2021,36,1:1
17Author Correction:Evolutionarily conservative and non-conservative regulatory networks during primate interneuron development revealed by single-cell RNA and ATAC sequencing显示文摘Correction to:Cell Research http://gffzzd3cc09b8251d45dfsxufwvbnp0b6n6pn9.ffgz.tsg.suse.edu.cn/10.1038/s41422-022-00635-9,published online 10 March 2022 We found that the information in the original Supplementary Figs.S2–S4 was not fully displayed due to an error in the image upload.The correct images are shown below for better display.These corrections do not affect the description of the results or the conclusion of this work.No change of the original figure legends is needed.We apologize for the mistake.The original article has been corrected.Ziqi Zhao Dan Zhang Fuqiang Yang Mingrui Xu Shaoli Zhao Taotao Pan Chuanyu Liu Yongjie Liu Qingfeng Wu Qiang Tu Ping Zhou Rong Li Jia Kang Lan Zhu Fei Gao Yaqing Wang Zhiheng Xu 2023Cell Research2023,33,7:1
18Synthesis of light hydrocarbons over Fe/AC catalysts显示文摘A series of Fe/AC catalysts for catalytic hydrogenation of CO to light hydrocarbons(LHCs) were prepared by decomposing Fe(CO)5 in an autoclave.The catalysts activities were tested in a high-pressure micro reactor.The results show that both CO conversion and LHCs selectivity were significantly affected by the amount of Fe loaded onto the catalysts.The optimum Fe content was determined to be 10% by weight of the catalyst.Over the corresponding catalyst(i.e.,10% Fe/C catalyst),the conversion of CO and the selectivity of LHCs were 94.8% and 59.2%,respectively,at 360 °C.Based on various catalyst characterization techniques,such as XRD,BET and SEM,the catalysts surface areas and pore volume decreased and the smaller particles agglomerated at the edges and corners in the outer region of the support with the increasing Fe content.The agglomerated particles increased greatly when the iron content of the catalyst was higher than 10%.The decrease of catalyst activity can be due to the agglomerated particles.Zhao Jianjun Zong Zhimin Wang Taotao Liu Tong Wei Xianyong 2012International Journal of Mining Science and Technology2012,22,2:1
19Experimental study of the settling of twin spherical particles released side by side: The impact of particle size, fluid viscosity, initial spacing, and particle density显示文摘The settling of solid particles in a fluid is an important process that needs to be considered in many fields of research.For example,the interactions among particles and between particles and the surrounding fluid are important topics in studying suspended sediment transport and water clarification.In this paper,the settling processes and interactions of twin spherical particles released side by side were experimentally studied.The Reynolds number varied in the range of 1-300,which is within the transition zone.Particle Tracking Velocimetry(PTV)and Particle Image Velocimetry(PIV)were utilized to capture the settlement trajectory,and provide insight into the flow fields around the particles.The influences of particle size,fluid viscosity,initial spacing,and particle density on the settling process were systematically investigated.The experimental results reveal that the initial spacing between the twin particles(l_(0)*)and the Reynolds number(Re)are the two most important factors affecting particle settling.The interaction between particles comprises only repulsion when the initial spacing is small,while the density of particles has little effect on the final settling state when the initial spacing is not very small.The flow fields around different particles are similar for the same Re,leading to similar final settlement behaviors,except for the case of l_(0)*=0,when the influence of particle rotation cannot be ignored.Except for the case of l_(0)*=0,although the particle density has little effect on the final settling behavior,it affects the repulsive process during settling.The final repulsive distance between the twin particles is highly dependent on Re and l_(0)*.Two critical Re values exist(~10 and~100),where the repulsive distance is negatively correlated with Re when Re<10,but it is positively correlated with Re when Re>100.However,the repulsive distance is always negatively correlated with l_(0)*.These findings can improve understanding of more complex phenomena such as the particle group settling process and sediment transport.Yang Xiao Jieqing Liu Pei Zhang Jian Zhou Dongfang Liang Zhihao Wang Taotao Zhang Saiyu Yuan Hongwu Tang 2023International Journal of Sediment Research2023,38,1:1
20Pregnancy outcomes and relative risk factors among Chinese women with congenital heart disease显示文摘Hua Liu Taotao Huang Weixiu Zhao Yao Shen Jianhua Lin 2012International Journal of Gynecology and Obstetrics2012,,:1
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