碱性锌锰电池封口新结构

本文作者研制了一种碱性锌锰电池的封口结构。经过电池的生产和长时间的贮存试验证实此种封口结构可以有效地防止电池泄漏。     

贮氢材料及其电池的发展(上)

本文系统地评述了目前国外贮氢合金材料、电极制备、电池性能、大生产情况以及存在的技术问题和解决的办法。     

碱性电池密封胶塞的防爆

碱性电池密封胶塞的防爆问题实际上是高分子材料的断裂问题。文章引述了分子理论和Griffith理论,从这两个理论角度阐述了胶塞的防爆压力受生产、贮存、温度过程中一系列复杂的物理、化学变化的影响,提出了确保胶塞质量等采取的措施。     

两种曲霉产蛋白酶特性

研究了本课题组多年选育的两种曲霉ＡＯＩ－６及８５１－６Ｂ的特性，并对影响该曲霉产３种蛋白酶活力的各种因素进行了探讨，本研究为进一步开发和广泛应用ＡＯＩ－６和８５１－６Ｂ这两种优良曲霉提供了理论依据。     

低汞碱锰电池的研制

低汞碱性锌锰电池的技术关键是低汞锌粉加入适当的添加剂,集流体铜芯的表面处理。     

高功率可充碱性锌锰电池的研制

本文对新一代可充碱锰电池即高功率可充碱锰电池(H—R—LR6型)的制作作了详细的研究,确定了电池结构、制造工艺,测试了产品性能,建立了产品的检验方法和检验标准。该电池标称电压1.5V,短路电流可达24.6A,1C率放电容量可放出约70％,循环寿命可达200周,明显优于传统粉环式结构的可充碱锰电池。     

采用TAB快速测定EMD性能

TAB(聚四氟乙烯乙炔黑)是好的导电和粘结合二为一的材料,采用该材料能快速评定EMD的性能。     

Solution structure and dynamics of a serpin reactive site loop using interleukin 1 as a presentation scaffold

Human interleukin-1ß (IL1ß) was used as a presentationscaffold for the characterization of the reactive site loop(RSL) of the serpin 1-antitrypsin (A1AT), the physiologicalinhibitor of leukocyte elastase. A chimeric protein was generatedby replacement of residues 50–53 of IL1ß, correspondingto an exposed reverse turn in IL1ß, with the 10-residueP5-P5' sequence EAIPMSIPPE from A1AT. The chimera (antitrypsin-interleukin,AT-IL) inhibits elastase specifically and also binds the IL1ßreceptor. Multinuclear NMR characterization of AT-IL establishedthat, with the exception of the inserted sequence, the structureof the IL1ß scaffold is preserved in the chimera. Thestructure of the inserted RSL was analyzed relative to thatof the isolated 10-residue RSL peptide, which was shown to beessentially disordered in solution. The chimeric RSL was alsofound to be solvent exposed and conformationally mobile in comparisonwith the IL1ß scaffold, and there was no evidence of persistinginteractions with the scaffold outside of the N- and C-terminallinkages. However, AT-IL exhibits sigificant differences inchemical shift and NOE patterns relative to the isolated RSLthat are consistent with local features of non-random structure.The proximity of these features to the P1-P1' residues suggeststhat they may be responsible for the inhibitory activity ofthe chimera.     

金线鱼肝胰脏蛋白酶激活提取条件的优化

用响应面法对金线鱼肝胰脏蛋白酶的激活及提取条件进行了优化。比较了不同激活剂的激活效果。研究了提取时间和pH值交互作用对蛋白酶活力的影响。结果表明:肠提液与CaCl2协同作为激活剂的激活效果最好。优化后激活时间为6 h,激活温度为27℃,肠提液质量分数为7%,CaCl2浓度为5.20 mmol/L,酶活力为1578.14 U/(g.min)。肝胰脏蛋白酶最佳提取条件为:提取时间8.5 h,提取温度11℃,pH 5.4,酶活力为1431 U/(g.min)。蛋白酶复性电泳结果说明酶活力增加显著。     

易染型海岛PTT纤维的碱处理研究

研究了易染型海岛PTT纤维的碱处理工艺条件,即达到最佳碱处理效果的碱浓度、碱处理时间和碱处理温度以及双烷基二甲基氯化铵(812)的浓度。结果表明最佳工艺条件为:NaOH质量分数12%,浴比1∶50,碱处理温度90℃,时间60 min。加入协同剂能明显提高纤维的碱减量率,协同剂的最佳质量分数为0.7%。