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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2010年第5期11卷 363-369页

作者： Ke SHAO Jian-hua YAN xiao-dong LI Sheng-yong LU Mu-xing FU Ying-lei WEI State Key Laboratory of Clean Energy Utilization Zhejiang University Hangzhou 310027 China

The effects of SO2,SO3 on de novo synthesis of polychlorinated dibenzo-p-dioxins (PCDDs) and dibenzofurans (PCDFs) were studied using model fly ashes incorporating copper oxide and activated carbon. It was found that the inhibitive effect of SO2 on PCDD/Fs formation is similar to that of SO3. To investigate the inhibition mechanism,CuSO4 formations from both CuO and CuCl2 were examined. The ability of SO3 to convert CuCl2 and CuO on a silica support into sulfate is much stronger than that of SO2. However,replacing silica by activated carbon leads to a much high conversion of CuCl2 to CuSO4 in the presence of SO2. The promotion by activated carbon is explained by the reduction of CuCl2 to Cu2Cl2 and the eventual conversion of Cu2Cl2 into CuSO4 is the main inhibition mechanism of SO2 on de novo synthesis of PCDD/Fs.

关键词： Cuprous chloride Model fly ash Sulfation Cupric chloride

Microanalysis of supersaturated gas release based on wall-attached bubbles

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Water Science and Engineering 2021年第1期14卷 80-86页

作者： Lu Lin Ran Li Jing-jie Feng Ying-han Huang xiao-dong yong Yang-ming Ou You-quan Yuan State Key Laboratory of Hydraulics and Mountain River Engineering Sichuan UniversityChengdu 610065China Power China Zhongnan Engineering Corporation Limited Changsha 410014China Sichuan Qingyuan Engineering Consulting Co. Ltd.Chengdu 610072China College of Architecture and Civil Engineering Chengdu UniversityChengdu 610106China

Supersaturation of dissolved gases in natural water,due to spillage from high dams and other factors,may cause fish *** previous experiments,the dissipation coefficient has been used to denote the degassing process of total dissolved gas(TDG)*** experiments mainly analyzed supersaturated TDG dissipation from a macroscopic *** precisely clarify the mechanism of supersaturated TDG release,this study investigated bubble adsorption at a wall surface from a microscopic *** experiment was conducted in a Plexiglas-wall container filled with supersaturated TDG water.A model that calculates the adsorption flux of supersaturated TDG by a solid wall,and helps describe construction for a contact angle at a three-phase intersection,was developed according to Young's *** model was used to investigate the formation process of bubbles adsorbed on a solid polymethyl methacrylate(PMMA)surface in supersaturated TDG *** adsorption effect of a solid wall on TDG release was analyzed based on the experimental *** modeling results were compared with observations under different wall area conditions,and it was found that TDG release tended to increase with wall *** study helps improve our understanding of the mechanisms of supersaturated TDG release and provides an important theoretical method for accurate calculation of the release *** adsorption flux model of the solid wall provides mitigation measures to combat the adverse effects of TDG supersaturation,which will be beneficial to the protection of aquatic organisms in hydropower-regulated rivers.

关键词： Supersaturation Total dissolved gas Wall-attached bubbles Release Calculation model

Bilateral bidirectional superior cavopulmonary shunt is more beneficial in medium and long term clinical outcomes than unilateral shunt

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Chinese Medical Journal 2009年第2期122卷 129-135页

作者： XU Yao-qiang LIU Ying-long LU xiao-dong LI yong-qing YU Cun-tao Pediatric Cardiac Center Cardiovascular Institute and Fuwai Hospital Chinese Academy of Medical Sciences and Peking Union Medical College Beijing 100037 China

Background The present study was aimed to compare the effects of bilateral and unilateral bidirectional superior cavopulmonary shunt （b-BDG and u-BDG） on pulmonary artery growth and clinical outcomes. Methods The 51 subjects enrolled in this study were divided into two groups： those receiving b-BDG （n=21） and those receiving u-BDG （n=30）. Clinical records were reviewed retrospectively at a mean of 43.3 months after BDG procedures. Chi square and t-tests were performed to analyze the data. Results Left and right pulmonary artery diameters increased 27%-37% in both groups. The pulmonary artery index increased 37.2% after b-BDG and 27.0% after u-BDG, b-BDG patients experienced a significant decrease in mean hemoglobin concentration and hematocrit value, and a correlated change in postoperative diameter of left pulmonary artery （LPA） and pulmonary artery index （y=0.2719, x=-1.8278; R=0.564, P=-0.008）. The change ratio of hemoglobin and postoperative LPA were also correlated in b-BDG patients （y= -0.0522x ＋ 0.3539; R=-0.479, P=-0.028）. Only one b-BDG patient versus twelve u-BDG patients needed total cavopulmonary connections 31.8 months after BDG surgery （P=-0.0074）. Moreover, only one （4.8%） b-BDG patient but eight u-BDG patients （26.7%） developed pulmonary arteriovenous malformations. Conclusions b-BDG increases bilateral pulmonary blood flow and promotes growth of bilateral pulmonary arteries, with preferable physiological outcomes to u-BDG. Results may imply that subsequent Fontan repair may not always be needed. Chin Med J 2009; 122（2）： 129-135

关键词： cavopulmonary shunts congenital heart defects cyanosis heart bypass, right pulmonary artery, hypoplasia

The Hilbert expansion of the Boltzmann equation in the incompressible Euler level in a channel

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Science China Mathematics 2025年第1期68卷 39-88页

作者： Feimin Huang Weiqiang Wang yong Wang Feng xiao Academy of Mathematics and Systems Science Chinese Academy of Sciences School of Mathematical Sciences University of Chinese Academy of Sciences Key Laboratory of Computing and Stochastic Mathematics (Ministry of Education) School of Mathematics and StatisticsHunan Normal University

The study of the hydrodynamic limit of the Boltzmann equation with physical boundary is a challenging problem due to the appearance of the viscous and Knudsen boundary *** this paper,the hydrodynamic limit from the Boltzmann equation with the specular reflection boundary condition to the incompressible Euler equations in a channel is *** on the multi-scaled Hilbert expansion,the equations with boundary conditions and compatibility conditions for interior solutions,and viscous and Knudsen boundary layers are derived under different scaling,***,some uniform estimates for the interior solutions,and viscous and Knudsen boundary layers are *** the help of the L2-L∞framework and the uniform estimates obtained above,the solutions to the Boltzmann equation are constructed by the truncated Hilbert expansion with multiscales,and hence the hydrodynamic limit in the incompressible Euler level is justified.

关键词： Boltzmann equation incompressible Euler equations hydrodynamic limit Hilbert expansion specular reflection boundary condition viscous boundary layer Knudsen boundary layer

Preparation of ^(67)Ga-EDTMP and its biodistribution studies

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Nuclear Science and Techniques 2003年第4期14卷 249-252页

作者： LI Qing-Nuan, ZHANG xiao-dong, ZHANG yong-Ping, LI Wen-Xin (Shanghai Institute of Applied Physics, the Chinese Academy of Sciences, Shanghai 201800) Shanghai Institute of Applied Physics the Chinese Academy of Sciences 上海 201800

67Ga-EDTMP was synthesized in a single step by adding 67GaCl3 to EDTMP solution. Dependences ofthe radiolabeling yield of 67Ga-EDTMP on EDTMP concentration, pH and reaction time were examined. Under theoptimum conditions, the radiolabeling yield of 67Ga-EDTMP was more than 97%. A biodistribution experiment inmice showed that 67Ga-EDTMP was mainly absorbed by skeleton and reached 13.25% at 0.5 h after injecting, thenkept a high level in 72 h with a maximum value of 16.82% at 48 h. The results suggest that 67Ga-EDTMP might be apotential bone pain palliation radiopharmaceutical due to its high skeletal uptake, rapid blood clearance and relativelylow soft-tissue absorption. But further work must be done to determine whether 67Ga-EDTMP is useful in thetreatment of painful osseous metastases.

关键词：镓放射性同位素示踪核医疗学疾病诊断疾病治疗

Synthesis of structure-controlled β-SiC/CNT composites

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Synthesis of structure-controlled β-SiC/CNT composites

非巴氏杀菌精酿IPA啤酒微生物安全性的研究

第八届中国功能材料及其应用学术会议

作者： BI Song xiao yong-dong HU Liang-quan HU Zhao-hui ZHONG Chang-rong Xi'an High Technology Institute

Nanostructured beta-silicon carbide(β-SiC)/carbon nanotube(CNT) composites were synthesized by carbothermal reduction of silica and CNTs with diverse nCrnSi mixing *** structural and morphological characterizations of the composites were carried out using XRD,TEM,SEM,EDS,XPS,and *** the nCrnSiratio was 8:1(8C/Si),the surface of the CNTs was coated with a rough and compact SiC *** compact SiC layer was maintained when the nCrnSiratio was reduced to 5:1(5C/Si);however,the local area of which changed into spherical *** could completely react with SiO to form SiC spherical particles with diameters in the range 200-600 nm when the nCrnSiratio was 3:1(3C/Si).

关键词： Carbon nanotube Silicon carbide Carbothermal reduction structure-controlled

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食品科技 2017年第9期42卷 59-65页

作者：李丹张晓勇董小雷齐鲁工业大学生物工程学院山东省微生物重点实验室济南250353

研究了啤酒花中苦味质对IPA啤酒的抑菌能力。利用添加四氢异-α-酸来衡量啤酒的苦味值的关系,将大肠杆菌、短乳杆菌和四片联球菌(足球菌)3种代表性啤酒有害菌作为试验用菌,测定苦味质对有害菌的生长和抑制情况。同时对该苦味值下成品IP... 详细信息

研究了啤酒花中苦味质对IPA啤酒的抑菌能力。利用添加四氢异-α-酸来衡量啤酒的苦味值的关系,将大肠杆菌、短乳杆菌和四片联球菌(足球菌)3种代表性啤酒有害菌作为试验用菌,测定苦味质对有害菌的生长和抑制情况。同时对该苦味值下成品IPA啤酒的理化指标、微生物稳定性和感官品评进行测定。结果表明,IPA啤酒的苦味值达到(50~80)IBU时杀菌效果最好,可以保持啤酒的新鲜度,对啤酒的风味物质破坏较小。

关键词：四氢异-α-酸苦味值抑菌生物稳定性

姜黄素维生素E聚乙二醇琥珀酸酯-聚乙二醇硬脂酸酯15胶束对姜黄素溶解度和口服生物利用度的影响

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中草药 2017年第5期48卷 902-906页

作者：童晓东范永春严玮南通市中医院江苏南通226001 江苏省中医药研究院江苏南京210028

目的以维生素E聚乙二醇琥珀酸酯(VE-TPGS)和聚乙二醇硬脂酸酯15(Solutol HS 15,SHS15)为载体制备姜黄素胶束,并研究该胶束对姜黄素溶解度和口服生物利用度的影响。方法采用薄膜分散法制备姜黄素胶束;通过胶束平均粒径、载药量、包封率... 详细信息

目的以维生素E聚乙二醇琥珀酸酯(VE-TPGS)和聚乙二醇硬脂酸酯15(Solutol HS 15,SHS15)为载体制备姜黄素胶束,并研究该胶束对姜黄素溶解度和口服生物利用度的影响。方法采用薄膜分散法制备姜黄素胶束;通过胶束平均粒径、载药量、包封率等指标表征该胶束,同时测定姜黄素的溶解度;通过体外释放考察该胶束的释放特性;进一步通过大鼠实验评估胶束对姜黄素口服生物利用度的影响。结果当VE-TPGS与SHS15加入质量比为3∶7时,胶束粒径为(35.79±1.23)nm,多分散性指数(PDI)为0.12±0.03;在该条件下,胶束的载药量和包封率分别为9.34%和90.03%,姜黄素的溶解度达到2.03 mg/m L;体外释放实验中,胶束组较姜黄素组有缓慢释放特性;大鼠口服生物利用度实验中,胶束组较姜黄素组的相对生物利用度提高到303.5%(P<0.01)。结论本实验制备的胶束不仅有较好的缓释特性,还提高了姜黄素的溶解度和口服生物利用度。利用药物-胶束体系来改善难溶性药物的溶解度,具有较高的临床应用潜力。

关键词：姜黄素维生素E聚乙二醇琥珀酸酯聚乙二醇硬脂酸酯15 溶解度口服生物利用度胶束薄膜分散法载药量包封率体外释放

城市化、空间溢出与经济增长——基于空间Durbin面板模型的实证研究

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经济问题 2017年第4期 18-23页

作者：刘晓明刘小勇董建功山西省社会科学院经济研究所山西太原030006 华南理工大学广州国家创新型城市发展研究中心广东广州510006 上海财经大学经济学院上海200433

利用中国1986-2014年省级面板数据实证检验了城市化对经济增长的影响。运用空间面板Durbin模型,将城市化对经济增长影响的总效应分解为直接效应和间接效应。实证结果表明,城市化对经济增长存在显著的正向效应,纳入空间因素之后,城市化... 详细信息

利用中国1986-2014年省级面板数据实证检验了城市化对经济增长的影响。运用空间面板Durbin模型,将城市化对经济增长影响的总效应分解为直接效应和间接效应。实证结果表明,城市化对经济增长存在显著的正向效应,纳入空间因素之后,城市化对经济增长的正向效应更为显著,且间接效应明显高于直接效应。这一结果表明,相邻地区城市化程度的提高会显著提高本地经济发展水平,城市化通过集聚效应和辐射效应对本地区和其他地区经济增长产生影响。因此,城市化过程中政府应充分利用城市化的聚集效应和辐射效应,引导城市集群发展,充分发挥城市化对经济增长的推动作用。

关键词：城市化经济增长空间面板Durbin模型

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多壁碳纳米管的氧化剪断处理及其分散性

新型炭材料 2014年第2期29卷 109-117页

作者：毕松苏勋家侯根良刘朝辉肖舟肖永栋曹茂盛第二炮兵工程大学陕西西安710025 北京玻钢院复合材料有限公司特种纤维复合材料国家重点实验室北京102101 北京理工大学材料科学与工程学院北京100081

利用混合强酸对多壁碳纳米管（MWCNTs）进行氧化浸泡处理。采用透射电镜、原子力显微镜、Raman光谱、红外光谱等分析手段对处理前后的MWCNTs进行表征，探索氧化浸泡时间对MWCNTs微观形貌及剪断过程的影响，并对氧化剪断后短碳管在水溶... 详细信息

利用混合强酸对多壁碳纳米管（MWCNTs）进行氧化浸泡处理。采用透射电镜、原子力显微镜、Raman光谱、红外光谱等分析手段对处理前后的MWCNTs进行表征，探索氧化浸泡时间对MWCNTs微观形貌及剪断过程的影响，并对氧化剪断后短碳管在水溶液中的分散性进行研究。结果表明，MWCNTs在混酸中浸泡72h左右可以使其从缺陷处剪断，形成管长为200～1500nm的短直管，且碳管表面及端口处嫁接上羟基和羧基活性基团。由于极性官能团的存在，使得MWCNTs的等电点从4．5下降到3．5，沉降实验和分光光度测试显示短碳管在有适量阴离子型表面活性剂存在的pH-2的水溶液中超声振荡40min后具有良好的分散效果。

关键词：碳纳米管氧化剪断微观形貌分散性