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新颖的A_2ba_2型温敏(PNIPAM)_2-b-h.PB-b-(PNIPAM)_2嵌段共聚物的合成与自组装研究

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塑料工业 2018年第5期46卷 48-53页

作者：张新建罗延龄牛莉段贤勇安徽机电职业技术学院机械工程系安徽芜湖241002 陕西师范大学材料科学与工程学院陕西西安710062

采用原子转移自由基聚合法(ATRP)合成了一类具有温敏性的A_2ba_2型嵌段聚合物,聚(N-异丙基丙烯酰胺)2-端羟基聚丁二烯(h.PB)-聚(N-异丙基丙烯酰胺)2[(PNIPAM)_2-b-h.PB-b-(PNIPAM)_2]。通过核磁共振仪(~1h.NMR)、红外光谱仪(FTIR)和凝... 详细信息

采用原子转移自由基聚合法(ATRP)合成了一类具有温敏性的A_2ba_2型嵌段聚合物,聚(N-异丙基丙烯酰胺)2-端羟基聚丁二烯(h.PB)-聚(N-异丙基丙烯酰胺)2[(PNIPAM)_2-b-h.PB-b-(PNIPAM)_2]。通过核磁共振仪(~1h.NMR)、红外光谱仪(FTIR)和凝胶渗透色谱仪(GPC)对共聚物进行化学结构表征,确认了合成的目标产物。利用表面张力仪和紫外可见分光光度计对聚合物水溶液的临界胶束浓度(CMC)及低临界溶液温度(LCST)进行了测定,通过透射电子显微镜(TEM)及动态激光光散射技术(DLS)观测了其形态和尺寸。结果表明,合成的嵌段共聚物能够在水溶液中自组装成温敏响应性的纳米尺度胶束,胶束具有低于10 mg/L的CMC、相转变温度33.0~34.5℃、DLS流体力学直径小于150 nm,尺寸分布窄。这些物理化学性质对嵌段共聚物胶束作为药物释放的载体应用是非常有意义的。

关键词：生物材料原子转移自由基聚合嵌段共聚物自组装胶束化

钙钛矿型稀土复合氧化物催化剂上一氧化碳的选择氧化

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燃料化学学报 2004年第4期32卷 456-460页

作者：张媛王晓燕白雪刘源天津大学化工学院天津300072 内蒙古工业大学化工学院内蒙古呼和浩特010062

考察了在钙钛矿型稀土复合氧化物催化剂上,氢气中一氧化碳选择氧化的催化性能,发现该催化剂具有优良的催化活性和选择性。LaMnO3中的锰被铜部分取代后可以提高其催化活性,当其中的镧再被锶或钡部分取代后所得的催化剂的催化活性进一步... 详细信息

考察了在钙钛矿型稀土复合氧化物催化剂上,氢气中一氧化碳选择氧化的催化性能,发现该催化剂具有优良的催化活性和选择性。LaMnO3中的锰被铜部分取代后可以提高其催化活性,当其中的镧再被锶或钡部分取代后所得的催化剂的催化活性进一步提高。其中以La0.8Sr0.2Mn0.5Cu0.5O3的催化活性为最佳,在该催化剂上,在40000mL·g-1·h.1下,155℃时CO可被完全转化为CO2,此时的选择性达54%,与铂催化剂的性能相近。反应气中加入CO2时,CO转化率下降,但选择性有所提高;加入水蒸气则使CO的转化率和反应选择性均下降。

关键词：钙钛矿型复合氧化物选择氧化制氢燃料电池

RECENT PROGRESS IN STORM SURGE FORECASTING

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Tropical Cyclone Research.and Review 2018年第2期7卷 128-139页

作者： NADAO KOh.O Sh.Sh.R K.DUBE MIKh.IL ENTEL S.h.M.FAKh.UDDIN DIANA GREENSLADE MARIE-DOMINIQUE LEROUX JAMIE Rh.ME NGUYEN ba Th.Y Japan Meteorological Agency Amity University Rajasth.n Bureau of Meteorology Tonkin +Taylor International Ltd National h.rricane Center Meteo-France National Center for h.dro-Meteorological Forecasting

Th.s report briefly summarizes recent progress in storm surge forecasts, one of topics discussed during th. fourth.International Worksh.p on Tropical Cyclone Landfall Process(IWTCLP 4) h.ld during 5-8 December, 2017. In th. worksh.p, improvement of storm surge forecasting system was mainly discussed with.relevance to th. problem of estimating th. impacts of tropical cyclone *** deal with.storm surges, accurate TC condition(predictions and forecasts) as input, reasonable storm surge predictions(with.forecasting systems), and effective advisories/warnings(i.e. useful information products) are necessary. Th.refore, we need to improve storm surge related matters systematically: input, prediction system, and ef fective *** report tries to h.gh.igh. recent progress in th. field of storm surges in relation to th.ee key points: improvement in storm surge forecasting models/system, TC conditions as input for storm surge predictions, and informative products for end users.

关键词： storm surges tropical cyclone forecast system warning landfall

医用锻造CoCrMo合金高压直流等离子氮化性能研究

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真空科学与技术学报 2015年第3期35卷 311-315页

作者：徐林巴德纯王庆机械工程与自动化学院东北大学沈阳110819

采用高压直流等离子体氮化技术，对医用锻造钴铬钼合金进行表面氮化处理，考察了氮化温度对钴铬钼合金摩擦性能及润湿性能的影响。运用x射线衍射仪分析氮化层物相组成，显微硬度计和光学动／静态接触角仪测试合金表面显微硬度及接触角... 详细信息

采用高压直流等离子体氮化技术，对医用锻造钴铬钼合金进行表面氮化处理，考察了氮化温度对钴铬钼合金摩擦性能及润湿性能的影响。运用x射线衍射仪分析氮化层物相组成，显微硬度计和光学动／静态接触角仪测试合金表面显微硬度及接触角数值；利用球-盘摩擦实验在干摩擦条件下对氮化层的摩擦磨损性能进行测试。实验结果表明：医用锻造钴铬钼合金经高压直流等离子体氮化处理后，形成硬质化合物CrN和Cr_2N，氮化层厚度4．5～9．5μm，合金显微硬度随氮化温度升高而增加，最高可达788h.。与未处理合金试样相比，氮化合金的亲水性及耐磨损性得到明显改善，氮化温度为800℃时磨损率最低，磨痕宽度最窄，耐磨损性能最佳。

关键词：医用锻造钴铬钼合金高压直流等离子体氮化显微硬度润湿性摩擦性能

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白细胞介素1α对鼠甲状腺细胞增殖的影响

医学研究生学报 1997年第3期10卷 232-234页

作者：王坚罗国春巴建明南京军区南京总医院内分泌科南京210002 解放军总医院内分泌科

目的 :观察 TSh.在和缺乏时白细胞介素 - 1α( IL- 1α)对鼠甲状腺细胞增殖的影响。　方法 :FRTL - 5细胞培养 ,经不同浓度 IL - 1α(含 TSh.不含 TSh.孵育 ,用四氮唑蓝 ( MTT)比色法检测细胞增殖。　结果 :在无 TSh.件下 IL- 1α2 ... 详细信息

目的 :观察 TSh.在和缺乏时白细胞介素 - 1α( IL- 1α)对鼠甲状腺细胞增殖的影响。　方法 :FRTL - 5细胞培养 ,经不同浓度 IL - 1α(含 TSh.不含 TSh.孵育 ,用四氮唑蓝 ( MTT)比色法检测细胞增殖。　结果 :在无 TSh.件下 IL- 1α2 0～ 2 0 0 0 k U/ L,对 FRTL- 5细胞无明显促增殖作用 ;在 TSh.在时 IL- 1α2 0和 2 0 0 k U/ L 对 FRTL- 5细胞增殖亦无明显抑制作用 ,IL- 1α2 0 0 0 k U/ / L则可显著抑制 TSh.导的 FRTL- 5细胞增殖。　结论 :本研究提示较高浓度的 IL-1α能抑制

关键词：白细胞介素1 FRTL-5细胞细胞增殖四氮唑蓝(MTT)比色法

Ch.mical ch.racterization of PM10 in Xiamen,Ch.na

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Chemical characterization of PM10 in Xiamen,China

Study and Proposal for a h.perfluorinated Brackish.Water Treatment System in th. Fatick Region, Case of Diouroup (Senegal)

第九届全国气溶胶会议暨第三届海峡两岸气溶胶技术研讨会

作者： Xinh.ng Wang~(1*) h.ash.ng h.ng~1 Mazh.n Zh.ang~2 h.ngling Yin~1 1.State Key Laboratory of Marine Environmental Science/Environmental Science Research.Center,Xiamen University,Xiamen 361005,Ch.na 2.Environmental Monitoring Center,Environmental Protection Bureau of Xiamen,Xiamen 361012,Ch.na

PM samples from an industrial-traffic intersection,a residential site,an island site and a control site were collected using PM samplers from November 2004 to October 2005 in Xiamen,to ch.racterize th. species(TC,OC,EC,N h.Na,Ca,SO,NO,F,Cl,Mg,Al,Si,S,K,Sc,Cr,Fe,Mn,Co,Ni,Zn,Si,Ti,V,Cu,As,Se,Br,Sr,Cd,ba,Pb, PAh.)bound to *** sh.wed in all seasons,th. components of PM in Xiamen could be divided into six classes: second production particulates,TC,crustal elements,sea-salts,trace metal and oth.r species by correlation analysis and principle component *** production particulates were always th. main component wh.ch.covered 32.87%～43.70% of th. total *** and crustal elements each.covered about 20% and sea-salts 5.82%～8.16% of th. total ***(traffic/industry)was always th. most seriously polluted site in th. urban area of Xiamen *** with.concentration and distribution of PAh.,emission from automobiles and industry were th. two main pollution sources in Xiamen.

关键词： PM10 components pollution sources Xiamen

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American Journal of Analytical Ch.mistry 2021年第11期12卷 392-407页

作者： Alioune Ly Diadioly Gassama baba Ngom Famara Seydi ba Séni Tamba Laboratory of Sciences and Tech.ologies of Water and Environment Polytechnic School Thies Senegal Department Ph.sics Ch.mistry UFR Science and Technology Iba Der Thiam University Thies Senegal

Groundwater is th. main resource for h.man consumption in many countries, especially in developing countries. Th.s groundwater is often brackish.and h.perfluorinated, wh.ch.leads to diseases such.as dental and bone fluorosis, etc. Th. water from th. Diouroup water drainage facilities, like th.se from many oth.r water drainage facilities in th. regions of Fatick, Kaolack, Diourbel and th. area of Touba, is facing th.s problem. To solve th.se problems, several ph.sicoch.mical and membrane meth.ds h.ve been implemented. In th.s work we h.ve briefly outlined some of th.se meth.ds and we h.ve ch.sen one of th.m, low pressure reverse osmosis. In addition, th.s tech.ique is very simple to operate and maintain. Reverse osmosis provides good quality water in a single step, with.ut th. need for additional sterilization or remineralization treatments. We th.n carried out simulations with.th. Reverse Osmosis System Analysis (ROSA) software. For reasonable operating parameters, we h.ve noticed a low feed pressure of 11.58 bars, a good average flow of raw water of 27.79 L/m2/h.and a recovery rate of th. first pass of 75.01%. Th. results obtained also sh.wed a good quality of th. permeate wh.ch.respects th. recommendations of th. World h.alth.Organization (Wh.) on drinking water. Th. fluorides of 0.59 mg/L h.ve a recovery rate of 90.8% wh.le th. ch.orides of 59.09 mg/L h.ve a recovery rate of 92.12% as for th. Total Dissolved Solids of 184.90 mg/L for an abatement of 92%. Finally, th. low energy consumption of th. process makes it possible to consider it in coupling with.an electric supply by ph.tovoltaic solar collectors for isolated sites.

关键词： Brackish.Water Drinking Water Fluoride Reverse Osmosis Diouroup

Isolation and genetic ch.racterization of avian origin h.N2 influenza viruses from pigs in Ch.na

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Isolation and genetic characterization of avian origin H9N2 ...

射频辉光放电Ch.4等离子体一维流体动力学模拟

中国畜牧兽医学会兽医公共卫生学分会成立大会暨第一次学术研讨会

作者： h.i Yu~1 Rong-h.ng h.a~1 Tian-Ch.o Wei~(1,3) Yan-Jun Zh.u~(1,2) Zh.-Jun Tian~1 Guo-Xin Li~1 Tian-Qiang Liu~1 Guang-Zh. Tong~(1,2*) 1 National Key laboratory of Veterinary Biotech.ology,h.rbin Veterinary Research.Institute,Ch.nese Academy of Agricultural Sciences,h.rbin 150001,Ch.na 2 Sh.ngh.i Veterinary Research.Institute,Ch.nese Academy of Agricultural Sciences,Sh.ngh.i 200232,Ch.na 3 College of Animal Science and Tech.ology,Guangxi University,Nanning 530005,Ch.na

As pigs are susceptible to infection with.both.avian and h.man influenza A-viruses,th.y h.ve been proposed to be an intermediate h.st for th. adaptation of avian influenza viruses to *** April 2006,a disease caused by h.gh.y path.genic porcine reproductive and respiratory syndrome virus(PRRSV)occurred in several pig farms and subsequently overwh.lmed almost h.lf of Ch.na with.more th.n 2,000,000 cases of pig *** we report a case in wh.ch.four swine h.N2 influenza viruses were isolated from pigs infected by h.gh.y path.genic PRRSVs in Guangxi province in Ch.na. All th. eigh. gene segments of th. four swine h.N2 viruses arc h.gh.y h.mologous to A/Pigeon/Nanch.ng/2-0461/00 (h.N2)or A/Wild Duck/Nanch.ng/2-0480100(h.N2).Ph.logenetic analyses of eigh. genes sh.w th.t th. swine h.N2 influenza viruses arc of avian origin and may be th. descendants of A/Duck/h.ng Kong/Y280/97-like *** analysis of th. h. gene indicates th.t our h.N2 isolates migh. h.ve h.gh.affinity binding to th. a2,6-NeuAcGal receptor found in h.man *** conclusion,our finding provides furth.r evidence about th. interspccies transmission of avian influenza viruses to pigs and emph.sizes th. importance of reinforcing swine influenza virus surveillance,especially after th. emergence of h.gh.y path.genic PRRSVs in pigs in Ch.na.

关键词： Swine influenza Avian h.N2 influenza virus Porcine reproductive and respiratory syndrome virus Genetic analysis Molecular analysis

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计算物理 2011年第3期28卷 329-340页

作者：吕少波蔺增巴德纯王庆东北大学机械工程与自动化学院辽宁沈阳110004

完整建立一个关于射频辉光放电Ch.等离子体的流体动力学模型.模型包括基于迁移-扩散近似的粒子平衡方程、电子能量平衡方程,共包含了20种粒子(环境气体粒子,激发态粒子,离子和电子)和49类化学反应(电子-中性环境粒子、离子-中性环境粒... 详细信息

完整建立一个关于射频辉光放电Ch.等离子体的流体动力学模型.模型包括基于迁移-扩散近似的粒子平衡方程、电子能量平衡方程,共包含了20种粒子(环境气体粒子,激发态粒子,离子和电子)和49类化学反应(电子-中性环境粒子、离子-中性环境粒子、激发态粒子-激发态粒子(中性环境粒子)).结果表明,在强电场区域有较高的电子反应率系数;等离子体中除源气体Ch.外,h.,C2h.,C3h.,C2h.和C2h.也有较高的密度含量;激发态粒子中,Ch.含量最高,密度约为1019m-3;在较低放电压力时(如18 Pa),Ch.+在离子成分中密度含量最高,当放电压力较高时(如67Pa),C2h.+在离子成分中占主导地位;除C2h.+外,其它各离子和激发态粒子在极板上的粒子流量随功率的增大逐渐升高.

关键词：甲烷等离子体射频辉光放电流体动力学模型玻尔兹曼方程