复合浆料及其上浆性能的研究

选用PVA0588取代PVA1799对涤棉上浆,研究PVA1799、PVA0588、氧化淀粉及其配方的粘附及浆纱性能,探索PVA0588取代PVA1799的可能性.实验表明,与当前浆纱中常用浆料配方相比,综合考虑浆液性能、对涤/棉粗纱的粘附性能及浆纱性能的各项指标,PVA0588能够部分取代PVA1799,减小环境污染.     

芳纶帘线／橡胶复合材料粘合疲劳性能的研究

使用自制的改性一次REL浸剂浸渍芳纶帘线，并采用TCAT（Tire Cord Adhesion Testing)抽拔法和电镜观察法研究了芳纶帘线／氯丁橡胶粘合体系，芳纶帘线／天然橡胶粘合体系疲劳前后的粘合性能。     

Structural view of cadherin-mediated cell-cell adhesion

Following the multiplication of biochemical, biophysical and structural studies describing cadherin molecules and their interactions, several ideas have emerged to explain the mechanisms of cadherin-mediated cell adhesion. Although different models were proposed for cadherin interactions, a consensus has come forth considering lateral dimerization of cadherins as being a central component of the cell-cell adhesion process. This review summarizes the recent development in structural studies of cadherins. Received 14 September 1998; received after revision 14 November 1998; accepted 16 November 1998     

机车牵引力与制动力的分析

分析了矿用电机车的牵引力与制动力，指出各种矿山运输教材中机车章的错误。     

Effect of Electrolyte Impurities within Starch on the Adhesion of Quaternary Ammofiium Starch to Fibers

Influences of some electrolyte impurities within starch and starch cationization on the adhesion of quaternary ammonium cornstarch to cotton and polyester fibers were investigated. The electrolytes considered included NaCI, Na2SO4, NaH2PO4 and Na2HPO4. The adhesion to fibers was evaluated in terms of maximum strength and work-to-break of the roving sized with the starch pastes containing electrolytes. It was found that the cationization showed a positive effect on the adhesion to both fibers whereas the electrolytes gave an adverse effect and reduced the adhesion. The adverse effect depends on the type and amount of electrolytes. The influence of electrolytes on the adhesion can be ranked in a series of NaH2PO4〉 Na2 HPO4〉 Na2SO4 〉 NaCl. The adhesion enhances as the modification extent increases and the electrolyte content decreases. Furthermore, the adverse effect can be compensated by the positive effect of the starch modification even at a low modification extent. If the electrolytes are fully eliminated, the cationic starch can increase the adhesion strength by more than 10% for both fibers.     

MEMS器件用叠层镍间结合强度的研究

针对MEMS器件用叠层镍间结合强度差这一难题,开展了基于盐酸化学刻蚀提高叠层镍间结合强度的工艺研究.主要考查了不同盐酸浓度、处理温度等对镍层层间结合强度的影响规律.借助SEM、Veeco轮廓分析仪等观察断面,分析结合强度改善的原因.结果表明:在45℃的温度下,经过50%HCl、10 min的化学刻蚀,叠层镍间结合强度达到567.7 MPa,比未经化学刻蚀处理的叠层镍间结合强度提高了6倍.通过SEM、Veeco等分析手段,初步解释了结合强度提高的原因.     

膨体聚四氟乙烯外科隔膜作为心包替代物的临床应用评价

为了评价膨体聚四氟乙烯外科隔膜作为心包替代物在临床上的应用情况，从５９７例在小儿心脏外科的应用实例中选出２５６例与作为对照的７４４例进行对比分析。结果显示外科隔膜可预防术后心脏和近心大血管与胸骨后的粘连，从而减少再手术时的危险。使用了外科隔膜在术后出血、心包填塞、感染等并发症方面与对照组无显著性差异（Ｐ＞００５）。这提示外科隔膜可作为一种有效的和并发症少的心包替代物     

Progress of marine biofouling and antifouling technologies

Adhesion of marine fouling organisms on artificial surfaces such as ship hulls causes many problems, including extra energy consumption, high maintenance costs, and increased corrosion. Therefore, marine antifouling is an important issue. In this review, physical and biochemical developments in the field of marine biofouling, which involves biofilm formation and macro-organism settlement, are discussed. The major antifouling technologies based on traditional chemical methods, biological methods, and physical methods are presented. The chemical methods include self-polishing types such as tributyltin (TBT) self-polishing co- polymer coatings, which despite its good performance has been banned since 2008 because of its serious environmental impact. Therefore, other methods have been encouraged. These include coatings with copper compounds and biocide boosters to replace the TBT coatings. Biological extracts of secreted metabolites and enzymes are anticipated to act as antifoulants. Physical methods such as modification of surface topography, hydrophobic properties, and charge potential have also been considered to prevent biofouling. In this review, most of the current antifouling technologies are discussed. It is proposed that the physical antifouling technologies will be the ultimate antifouling solution, because of their broad-spectrum effectiveness and zero toxicity.     

小针刀治疗运动性伤病的研究现状和发展趋势

通过对小针刀治疗运动性伤病研究现状的分析，认为小针刀的适应症范围在逐渐扩大，治疗方法趋向于综合治疗，针对于组织微观病理变化的实验观察和综合治疗的方法有等进一步研究。     

凝胶化改性壳聚糖膜预防感染性腹膜粘连的对比研究

目的对比研究凝胶化改性壳聚糖膜和透明质酸钠对感染性腹膜粘连的预防作用。方法SD大鼠80只,随机分成四组:假手术对照组(A组),感染对照组(B组),凝胶化改性壳聚糖膜组(C组),透明质酸钠组(D组)。利用大鼠蚓突盲端制造感染性腹膜粘连模型,然后每组分别用相应的方法处理污染面,处理后2、4周打开腹腔,以Bha-tia分级法评定蚓突盲端的粘连程度,并对盲端组织行羟脯胺酸(OHP)水平测定和病理学检查。结果术后2周和4周,C组的粘连程度显著轻于B组(P=0.000),OHP水平显著低于B组(P=0.000);D组的粘连程度、OHP水平和B组无显著性差异(P>0.05)。病理学检查:B组术后2周局部组织以急性化脓性炎症为主,4周时以肉芽组织增生和纤维组织形成的慢性炎症反应为主;C、D组的病理改变类型同B组相同,但C组的上述改变较B组明显减轻,而D组和B组间则无明显差异。结论凝胶化改性壳聚糖膜具有明显的预防感染性腹膜粘连的作用,而透明质酸钠的作用则不明显。