氧化锌压敏电阻的老化机理

研究了ZnO压敏电阻的老化现象,提出了一种新的老化机理-线性链理论。该理论认为,在外电场作用下,压敏电阻势垒高度降低;当降低到一定值时,晶界可变电阻转化为线性晶界电阻,从而压敏链转化为线性链。线性链是稳定的,因而压敏电阻老化到一定程度后其电性能将不能完全恢复。     

聚合物降解产物伤害与糖甙键特异酶破胶技术

综述了钻井，完井，尤其是水力压裂作业中产生的多糖类聚合物伤害和应用糖甙键特异酶破胶，解除多糖类聚合物伤害的技术。第一节报道了聚合物降解产物造成的伤害，指出冻胶破胶液粘度低并不代表压裂液已从充填裂缝中充分返排，氧化破胶剂和普通酶破胶剂不能使多糖类聚合物充分降解，产生的大分子量，水不溶的降解产物可对地层造成伤害，消除伤害的办法是采用对糖甙键有特异性的各种水解酶作压裂液破胶剂或伤害地层处理剂。第二节报道了各种聚合物（纤维素，瓜尔胶，淀粉）糖甙键特异酶降解聚合物的机理。第三节报道了糖甙键特异酶（主要针对瓜尔胶）的应用性能测试及结果，包括岩心流动实验，含糖量和分子量测定，传导性测试。第四节介绍了糖甙键特异酶消除聚合物伤害和用作压裂液破胶剂的现场应用，包括选井原则，实施工艺要点及3个典型井例。     

浅谈酶在非接触印刷废纸脱墨中的应用

简要地介绍了纤维素酶、半纤维素酶和淀粉酶在非接触印刷废纸脱墨中的研究及其应用     

邻苯二甲酸酯鼓泡生物降解

该课题测试了邻苯二甲酸酯类化合物的鼓泡生物降解行为。结果表明，邻苯二甲酸酯的降解速率常数（kb)与其烷基链长度之间存在良好的相关性，kb=0.0009x^2-0.019x 0.1123，相关系数r=0.9906；浓度超过500mg/L时，邻苯二甲酸二乙酯可抑制自身的生物降解；中间产物邻苯二甲酸浓度超过50mg/L时，也对邻苯二甲酸二乙酯的生物降解有明显的抑制作用。     

Probing nanomechanical properties of nickel coated bacteria by nanoindentation

As a powerful method for the study of mechanical properties at micro-/nanoscale, nanoindentation was applied to measure the hardness and elastic modulus of bacteria-templated metallic nanomaterials for the first time. Based on the morphological characterization by Atomic Force Microscopy (AFM) and Transmission Electron Microscopy (TEM), nanoindentation testing results showed that after coating with nickel via electroless chemical plating, the elastic modulus and hardness of bacterial cells were increased about 17 times and 50 times, respectively, indicating a great improvement in mechanical properties. This study would lay a forceful mechanical foundation for a better and general understanding of this kind of biotemplated metallic nanomaterials, which showed potential applications in nanoelectronics, nanomagnetism and nanomechanics.     

Protein Extraction from Heat-stabilized Defatted Rice Bran: II. The Role of Amylase, Celluclast, and Viscozyme

ABSTRACT: The effectiveness of 3 carbohydrases for protein extraction from heat-stabilized defatted rice bran (HDRB) was evaluated. Amylase, viscozyme and celluclast extracted a maximum of 45.4, 12.1, and 28.5% protein, respectively. Further study showed that extracted protein ranged from 9.5 to 58.4% under conditions of water to bran ratio (5:1 to 20:1), α-amylase (0 to 110000 units/10 g rice bran), temperature (35 to 55 °C), and time (1 to 8 h). The maximum protein extracted was 58.4% with a water to bran ratio of 17:1, 87637 units amylase, and 50.9 °C. These results suggest that impure food-grade amylase containing protease is more effective than celluclast and viscozyme in protein extraction from HDRB.     

高分辨裂解气相色谱－质谱研究聚吡咙的热分解

用高分辨裂解气相色谱－质谱考察了不同聚吡咙的热分解，分析了其热分解产物的组成、分布和归属，研究了其环化过程以及该过程对热分解的影响，进而详细阐述了聚吡咙的热分解机理。     

Abrasion phenomena in twill tencel fabric

The abrasion characteristics of Tencel fabrics were evaluated by Martindale abrasion and laundering, and the breakdown mechanism of fibers was surveyed by scanning electron microscopy. The fabric was subjected to pad‐dry‐cure treatment with two different types of modified dimethyloldihydroxyethylene urea resins (Reaktant DH and Reaktant FC). Although the degree of dry abrasion varied with different resins, the damage exhibited by individual fibers differed little from untreated to resin‐treated; the major mechanism of abrasion was through friction, and the mechanism of fiber failure was multiple splitting and transverse cracking. In untreated Tencel, the characteristic feature of wet abrasion was massive fibrillation, and in crosslinked fabrics, the wet abrasion mechanism was through fiber slippage and slicing action, although in the Reaktant FC‐treated fabric, the wet abrasion mechanism was more through slicing than through fiber splitting. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 102: 1391–1398, 2006     

阳离子化多元醇防塌剂的研制

室内研究和现场应用表明,聚乙烯醇类防塌剂表现出较明显的增粘负效应,可引起钻井液粘度的急剧增加,严重影响其推广应用.通过金属盐催化降解和阳离子化反应,研制出了抑制性好且增粘负效应低的阳离子化改性多元醇防塌剂.考察了阳离子化试剂、反应温度、反应时间对取代度、反应效率和产品主要性能的影响,得出了阳离子化多元醇防塌剂最佳制备条件,即：PVA与阳离子化试剂物质的量比为1：1,反应温度为50℃,反应时间为4 h,阳离子度可达0.435.     

化学复合镀Ni-P-TiO_2光催化降解次甲基蓝

以钛酸丁酯为原料通过溶胶 凝胶法制备出粒径 30nm左右的纳米TiO2 ,利用化学复合镀在钢铁基底上形成Ni P 纳米TiO2 复合镀层 ,该复合镀层对次甲基蓝有较好的光催化降解作用 ,其催化性能与粉末状纳米TiO2 的催化性能大致相当。