GCr15刀轴的断裂分析

本文对佳木斯市制药机械厂生产的制丸机刀轴在装机前出现断裂现象进行了分析,指出原热处理工艺中所采用的冷却介质不当是导致断裂的主要原因。     

软X射线显微术Si_3N_4薄膜窗口的研制

介绍了在软Ｘ－射线显微术研究领域中有重要应用的Ｓｉ_３Ｎ_４薄膜窗口的实验室制作方法，并形成一套独特制备工艺，Ｓｉ_３Ｎ_４薄膜窗口的研制成功推动了我国软Ｘ射线显微术研究的发展。     

PP/LDPE共混体系的辐射效应

研究了在多官能团单体—三烯丙基异氰脲酸酯存在下ＰＰ／ＬＤＰＥ共混体系接受γ－辐射的效果。用溶解度参数和ＴＥＭ技术评估了共混体系的相容性与多官能团单体在共混体系中的分布，并用ＳＥＭ、ＤＳＣ、动态力学等方法对共混体系相容性进行了表征。结果表明，ＰＰ／ＬＤＰＥ是不相容的共混体系，三烯丙基异氰脲酸酯主要分布在共混体系的相界面区域，辐照强化了共混体系的相间结合，增加了界面厚度，改善了共混体系的相容性。     

弱Lipschitz函数及其广义次梯度的几个性质

本文在[1]、[2]的基础上进一步讨论了广义梯度与广义次梯度的关系，揭示了广义次梯度的线性性质，推广了它们在最优化中的应用。     

铸态珠光体球铁QT800-2的研制与应用

本文研究了化学成分、冶金因素和合金元素对珠光体QT800-2的组织、性能的影响;优选出这种球铁最佳化学成分和相应的冶金工艺。热处理可以作为性能指标不合格时的补救措施。试验结果表明,在一般铸造条件下获得铸态珠光体QT800-2的要点是严格控制碳当量,优选好铜和钼等合金元素的配比及冶金工艺。     

新国家标准对电厂经济效益的影响

本文分析了点火丝热值变化对煤发热量测量的影响,并以实例说明了新国家标准中改变点火丝热值后,对电厂经济效益的影响。     

精密滴定热量计的研制

介绍一种精密滴定热量计,阐述热量计的设计原理,并对其结构进行了详细的阐述。热量计有效反应体积为100mL,恒温槽控温精度为±0.001 K,测温灵敏度为5×10~(-5)K,加样精度为0.5μL。用THAM对仪器进行了标定,测得溶解热为—47567±76J·mol~(-1),与文献值吻合。     

基体改进效应电热原子吸收法测定海水中铝

文中提出不同作用机理的双基体改进剂用于电热原子吸收法,建立直接测定海水中铝的方法.EDTA铵盐、氯化镁双基体改进剂有效地排除海水基体和微量元素干扰,测定铝的灵敏提高五倍以上。用标准曲线法计算铝含量,回收率为93.7—104.3％,相对标准偏差为2.6％,检出限为0.9μg/1.可分别测定铝总量,颗粒志铝及总溶解志铝.     

现代光学测量中若干变换基,测量链和仪器群

本文讨论了光学测量中的若干变换基,测量链和由此产生的仪器群以及它们的实际应用。     

Preparation and Application of Cholesteryl‐Benzo‐15‐Crown‐5/Cholesteryl Mixed Liquid Crystals

Various mixed liquid crystals containing crown ether‐cholesteryl liquid crystal, benzo‐15‐crown‐5‐COO‐C₂₇H₄₅ (B15C5‐COOCh), with various common cholesteric liquid crystals, e.g., cholesteryl chloride, cholesteryl benzoate and cholesteryl palmitate, were prepared and studied using polarizing microscopy and differential scanning calorimetry. Investigating the concentration effect of B15C5‐COOCh in mixed liquid crystals revealed that the addition of B15C5‐COOCh resulted in wider phase transition temperature ranges of these cholesteryl liquid crystals. The stability of these B15C5‐COOCh/cholesteryl mixed liquid crystals was studied using comprehensive graphic molecular modeling computer programs (Insight II and Discover) to calculate their molecular energy and stability energy. The effect of salts, e.g. Na⁺, Co³⁺, Y³⁺ and La³⁺, on the transition temperature range of the mixed liquid crystals was also investigated. The crown ether cholesteric liquid crystal B15C5‐COOCh was applied both as a surfactant and an ion transport carrier to transport metal ions through liquid membranes. Cholesteryl benzo‐15‐crown‐5 exhibited distinctive characteristics of a surfactant and the critical micellar concentration (CMC) of the surfactant was investigated by the pyrene fluorescence probe method. Cholesteryl benzo‐15‐crown‐5 was successfully applied as a good ion transport carrier (Ionophore) to transport various metal ions, e.g. Li⁺, Na⁺, La³⁺, Fe³⁺ and Co³⁺, through organic liquid membranes. The transport ability of the cholesteryl benzo‐15‐crown‐5 surfactant for these metal ions was in the order: Co³⁺ ≥ Li⁺ > Fe³⁺ > Na⁺ > La³⁺.