水的体胀系数的计量原理、公式和方法

利用不同温度下纯水的密度值,给出了水的体胀系数的计量原理、公式和方法。     

Nickel accumulation and its effects on the survival rate of Spodoptera litura Fabricius under continuous nickel stress

The artificial diets mixed with various concentrations of nickel were offered to the larvae of the phytophagous insect Spodoptera litura Fabricius for 3 generations. Nickel accumulations in the 6th instar larvae, pupae and newly emerged adults of the corresponding generations of S. litura were investigated by Inductively Coupled Plasma-Atomic Emission Spectrometer (ICP-AES), and the effects of nickel accumulations on the survival rate of S. litura were also evaluated by individual rearing. The results showed that nickel accumulated in the 6th instar larvae, pupae and adults of S. litura, and the accu- mulated nickel in all the tested developmental stages within a generation increased with the increase of the nickel doses in the treated diets and showed significant dose-dependent relationship with the nickel doses in the artificial diets. The results also indicated that the nickel accumulations in the 6th instar larvae, pupae, and newly emerged adults from the 3rd generation were higher than those from the 2nd generation, which were also higher than those from the 1st generation. Nickel concentrations in pupae and adults were significantly lower than those in larvae, which indicated that the excessive nickel might be excreted during metamorphosis. Furthermore, larval survival rate, pupation rate and eclosion rate of S. litura in the tested three generations all decreased with the increase of the nickel doses in the treated diets.     

微溶弱酸盐在纯水中溶解度的计算

本文研究了微溶弱酸盐的溶度积及弱酸的离解常数对微溶弱酸盐在纯水中溶解度的影响，分三种情况讨论了微溶弱酸盐溶解度的近似计算方法。     

纯伪投射模

给出了纯伪投射模的概念,讨论了纯伪投射模的一些性质.并证明了纯伪投射模关于直和因子封闭.     

数学的研究特点

通过对圆周率问题、公钥匙加密算法问题、光谱线的红向移动问题等的分析,探讨了纯数学研究的特点。     

测定饲料蛋白质含量的一种新方法

本文介绍一种测定各种饲料蛋白质含量的新方法—蛋白质水解茚三酮法。将标准蛋白和几种饲料样品加3％H_2SO_4,直接加热6小时,通过蛋白质水解产生的氨基酸与茚三酮反应的光吸收值,计算总蛋白量;与未水解的标样及饲料样品的甲醇提取液的茚三酮反应吸收值之差计算去游离氨基酸的纯蛋白质量。本法与凯氏氮素定量法无显著差异,与DAVID L·MARKKS报导的密封水解24小时的效果相同。     

一类同龄纯林系统的稳定性

考虑具有自然增生的同龄纯林发展系统．证明了该系统解的存在性及唯一性，并讨论了系统的稳定性.     

担载型镍催化剂上CH_4/CO_2重整反应的研究 Ⅱ.添加Co对Ni/Al_2O_3催化剂性能的影响

考察了ＣＯ助剂对Ｎｉ／Ａｌ２Ｏ３催化剂的活性和抗积炭性能的影响，发现添加少量Ｃo使催化剂 的抗积炭能力显著增强．ＴＰＲ、ＸＲＤ结果表明，Ｃo的添加降低了金属镍的分散度，并促进了尖晶石 ＮｉＡＩ２Ｏ４的生成．     

分析纯盐酸生产中残渣偏高的原因及控制措施

本文对在设备及设备参数确定的条件下，分析纯盐酸生产中残渣偏高的原因进行了分析探讨。结果表明，进塔原料的流量及蒸馏塔釜的温度是影响成品残渣偏高的主要因素，并提出了相应的控制措施。     

粗大柱状晶纯镍热变形流变应力行为及加工图

采用Gleeble-3500热模拟机,在变形温度为950~1 150℃、应变速率为0.001~10s-1的条件下,研究了粗大柱状晶粒纯镍的热变形行为和加工图.结果表明:热压缩过程中流变应力随应变速率增大而增大,随变形温度降低而增大.流变应力与应变速率、变形温度之间的关系用Zener-Hollomon参数来描述,热变形激活能为312.4kJ/mol.基于动态材料模型(DMM)热加工图及结合合金相显微组织分析,得到纯镍较优的热加工参数:变形温度为1 060~1 120℃,应变速率为0.03~0.20s-1的蛋形区域.