含POSS聚合物的制备与性能研究进展

多面体齐聚倍半硅氧烷(POSS)具有特殊的笼状结构,可从纳米尺度上起到对聚合物的改性作用。通过不同的方法将POSS分子引入到聚合物体系中去,以改善聚合物性能是聚合物改性的重要手段之一。文中从聚合方式上对含POSS聚合物的制备进行介绍,包括传统自由基聚合、活性聚合、缩聚聚合和开环聚合,并对合成的含POSS有机/无机聚合物的性能进行相关介绍

Effect of Sodium D-Gluconate-Based Inhibitor in Preventing Corrosion of Reinforcing Steel in Simulated Concrete Pore Solutions

应用电化学技术,结合扫描电子显微镜(SEM)观测,研究d-葡萄糖酸钠、钼酸钠和硫脲三组分复合缓蚀剂对模拟混凝土孔隙液中钢筋腐蚀行为的影响及其阻锈作用.结果表明:在含3.5%(W)nACl的模拟混凝土孔隙液中,复合缓蚀剂具有协同效应,对钢筋有良好的阻锈作用.当d-葡萄糖酸钠、钼酸钠和硫脲浓度分别为750、250和500Mg·l-1时,对钢筋的缓蚀效率可达到94.5%.应用软硬酸碱(HSAb)理论分析缓蚀机理,可认为三组分复合缓蚀剂在钢筋表面共同形成保护膜而阻止钢筋的腐蚀.The corrosion behavior of reinforcing steel in simulated concrete pore solutions with and without corrosion inhibitors was studied by electrochemical techniques and scanning electron microscopy(SEM).A combined inhibitive effect of sodium D-gluconate,Na2MoO4 and thiourea on restraining the corrosion of reinforcing steel immersed in the solution was observed.This result showed that there was a synergetic effect among the three agents in corrosion prevention.After adding the compound inhibitor(750 mg · L-1 sodium D-gluconate,250 mg · L-1 Na2MoO4,500 mg · L-1 thiourea) into the simulated concrete pore solution containing 3.5%(w) NaCl,the inhibition efficiency of the compound inhibitor was 94.5%.According to the Hard and soft acids and bases(HSAB) theory,the compound inhibitor worked by forming a protective film on the steel surface.国家自然科学基金(21073151;21173177;50731004;21021002)资助项---

聚合物纳米杂化材料的控制合成、自组装及功能化

聚合物纳米杂化材料的制备及功能化是当前国际前沿研究课题之一.特殊结构的聚合物可以通过分子间特殊相互作用,在纳米尺度上自发地组装成具有特殊结构和形态的集合体,这类材料在新材料、电子以及生物医学等领域具有广泛的应用前景.本文介绍国内外,特别是厦门大学在双亲性分子及嵌段共聚物的模板自组装、基于POSS单体纳米构筑单元以及POSS嵌段聚合物自组装的有机/无机纳米杂化材料、模板控制导电高分子材料纳米形态构筑等领域材料的可控合成和组装,与此同时对相关材料的性能及功能化应用进行了简要的讨论

Experimental study on reperfusion of intraocular lens

作者简介: 祁明信, 男, 1945 年7 月 出生, 教授、主任医师、博士研究生 导师, 主要从事白内障的基础与临 床研究。联系电话: 0591-83570887; E-mail:qihuang@netease. com 通讯作者: 黄秀榕,E-mail:[email protected][中文文摘]目的开展晶状体再灌注的离体和动物实验研究,并对再灌注人工晶状体技术进行评价。方法采用新鲜离体幼兔眼、离体猪眼、新西兰白兔眼,应用自行研制的人工晶状体材料,进行以下实验:(1)体外固化实验;(2)晶状体前囊膜微型撕囊及其稳固性实验;(3)经微型前囊膜开口超声乳化吸出晶状体内容物实验;(4)活的新西兰白兔眼内人工晶状体再灌注实验。结果(1)按硅酮聚合物与固化剂50:1的比例可获得柔软、弹性好、固化时间短(完全固化时间为60min)的注入材料;(2)晶状体前囊膜1.8～2.0mm的连续环形撕囊口具有较好的稳定性,可经该微型开口吸出晶状体内容物并灌注材料;(3)超声能量18%、流量25mL·min-1、负压120mmHg(1kPa=7.5mmHg)为晶状体内容物经微型前囊膜开口吸出的最佳条件;(4)注入灌注材料后可形成由晶状体囊膜包裹的、置换原晶状体皮质和核的、新的再灌注人工晶状体。结论采用再灌注人工晶状体的方法可进行新型人工晶状体再灌注,可为治疗白内障和老视提供参考。[英文文摘]Objective To carry out the experimental study on reperfusion of intraocular lens(IOLs) in vitro or in animal,and to assess the technique of IOLs reperfusion.Methods The following experiments were performed by using self-developed materials in fresh rabbit eyes and pig eyes in vitro,as well as in eyes of alive New-Zea-land rabbits:(1)Solidification study of self-developed material in vitro;(2)Continuous circular capsulorhexis(CCC) in anterior capsule of lens and its stability;(3)Draw of lens contents via phaco through mini-CCC;(4)IOLs ref illing in the eyes of alive New-Zea land rabbits. Results(1) Thematerialwhich was soft, springy and short-term solidification(full solidification time was 60 minutes) were obtained in certain proportion of geland solidified agent(50:1) in vitro; ( 2)The CCC in anterior capsule of lens with 1.8-2.0 mm diameter had very good stability. The lens contents were drawn and the materialwere refilled through themini-CCC; (3) The best conditions of drawing out lens contents through m ini-CCC were phaco energy 18% , flow 25 mL·min- 1, and negative pressure 120 mmH g (1kPa=7.5 mmHg);(4) The new refilled IOLs, which were wrapped by capsule of lens and were replaced original cortex and nucleus of lens, were obtained after thematerial refillied. Conc lusion. New IOLs are refilled through this method, which can prov ide reference for the treatment of cataract and presbyopia.福建省科技三项费用;教育厅重点资助项目基金资助(编号:K98041

EFFects of Two Kinds of Antibiotics on the lnductions and DiFFerentiations of Rice Embryo Calli

研究了两种抗生素对水稻种胚愈伤组织诱导和分化的影响。结果表明：供试抗生素卡那霉素（kAnAMyCIn，kM）和氨苄青霉素（AMPICIllIn，AP）对水稻种胚愈伤组织的诱导和生长都发生抑制作用，而kM比AP的抑制作用强。不论诱导期还是分化期用kM50、100Mg/kg处理，除可培养出少量白化苗外，200Mg/kg以上剂量处理的均未能分化出绿苗。仅分化期用AP处理，50~200Mg/kg浓度促进了绿苗分化，但浓度达400Mg/kg时则开始发生抑制作用。诱导期用kM处理的愈伤组织，在分化期其死亡率随浓度的提高而提高。而仅在分化期用kM和AP处理的愈伤组织，虽也有不同程度的致死现象，但数量较少。kM＋AP对愈伤组织的诱导和生长具有累加抑制作用。在分化期处理，AP可部分解除kM对绿苗分化的抑制效应。文中还讨论了kM和AP作为检测是否导入外源基因的适宜浓度。the inductions of rice embryo calli are inhibited by both Kanamycin (Km)and Ampicillin(Ap),two kinds of Antibiotics, moreover, Km is more eFFective than Ap, Callus induction rates are negatively and signiFicantly correlated with Antibiotic concentrations, Antibiotics.especially Km, also inhibit the growth of calli in the induction phase, No any green seedling diFFerentiates with Km treated either in induction phase or in diFFerentiation phase,except that a Few albinoseedlings appear in the treatments of 50 and 100 mg /kgm,DiFFerentiations of green seedlings are promoted by50 to 200 mg /kg of Ap treated in diFFerentiation phase.Callus death rates rise as the increases of Km concentrations treated in induction phase, Treatments withKm and Ap in diFFeren-tiation phase tend to cause the death of calli in varying degrees,but death rates are lower, Km +Ap inhibit coordinately the inductions and diFFerentiations of calli.Ap can partially remove the in-hibition eFFects of Km on diFFerentiation of green seedlings when treated in diFFerentiation phase.Discussions also have been made on the proper concentrations of Km andApused to detect whether the Foreign genes were introduced in

统计信息在企业经济管理中的应用分析

经济统计作为一种调查研究的有效管理手段，对于辅助企业的经营规划、促进企业的长久发展有着至关重要的现实意义。因此，统计信息在中国企业经济管理工作中的应用也越来越广泛。基于此，论文就统计信息进行简单概述，分析了统计信息在企业经济管理中的应用现状及作用，希望对提高企业的经济管理水平有所帮助。</jats:p

Effect of pH on the electrochemical corrosion behavior of reinforcing steel in simulated concrete pore solutions

通讯作者：杜荣归 作者简介：唐方苗(1985-)，男，安徽安庆人，在读硕士，师承杜荣归教授，从事腐蚀电化学研究。[中文摘要]应用极化曲线法和电化学阻抗技术,结合扫描电子显微镜方法,测试钢筋在模拟混凝土孔隙液中的钝化与去钝化行为,以及溶液pH值对钢筋电化学腐蚀行为的影响作用。结果表明,钢筋在pH值为12.50的模拟液中处于钝态,随着溶液pH值的降低,钢筋的耐蚀性下降。钢筋表面去钝化发生腐蚀的临界pH值在11.12～11.05范围内。[英文摘要]The passivation and depassivation behavior of reinforcing steel in simulated concrete pore solutions(SPS) with different pH values was studied by the polarization curves,electrochemical impedance spectroscopy and scanning electron microscopy.The results indicated that reinforcing steel was in the passive state in the simulated concrete pore solution with pH 12.50.The lower the pH value of solutions,the more unstable the passive film of reinforcing steel.The critical pH value for the localized corrosion of the reinforcing steel in the simulated concrete pore solutions was between 11.12 and 11.05 based on the electrochemical measurements.国家自然科学基金资助项目(20473066);国家自然科学基金重点资助项目(50731004);国家科技支撑计划资助项目(2007BAB27B04