Thermochemical Properties of Solid Complexes of Rare Earth Nitrates with Methionine

ＴｈｅｒｍｏｃｈｅｍｉｃａｌＰｒｏｐｅｒｔｉｅｓｏｆＳｏｌｉｄＣｏｍｐｌｅｘｅｓｏｆＲａｒｅＥａｒｔｈＮｉｔｒａｔｅｓｗｉｔｈＭｅｔｈｉｏｎｉｎｅＧａｏＳｈｅｎｇｌｉ（高胜利），ＹａｎｇＸｕｗｕ（杨旭武），ＲｅｎＤｅｈｏｕ（任德厚）ＳｈｉＱｉｚ...     

转动弹量热计的建立及对氯苯甲酸热值的测定

介绍了转动弹量热计的结构,用国家计量研究院提供的高纯苯甲酸标定转动弹量热计的能当量。并用该仪器测定了对氯苯甲酸的燃烧热—△E~O_t=3071.49±11.32kJ/mol。     

葡萄无籽化早熟多效剂在巨峰系葡萄上的应用

<正>葡萄无籽化早熟多效剂,可使巨峰、红富士、京亚、藤稔、里扎马特、紫金香、红罗莎里奥等有籽葡萄的无籽化率≥95%,有效坐果率≥92%,穗大而紧凑,果粒大而均匀,成熟期提前约30d。成熟果的糖度和硬度提高,耐贮运性能增强,食用甘甜爽口,风味独特。本文主要介绍在我国鲜食葡萄中栽培面积最大的巨峰无籽化等相关技术。     

Standard Enthalpies of Formation of Solid Complexes of Lanthanide Nitrates with Alanine

Ｇｒｅａｔｉｎｔｅｒｅｓｔｈａｓｂｅｅｎａｒｏｕｓｅｄｉｎｔｈｅｓｔｕｄｙｏｆｃｏｍｐｌｅｘｅｓｏｆｒａｒｅｅａｒｔｈｓａｌｔｓｗｉｔｈａｍｉｎｏａｃｉｄｓｂｅｃａｕｓｅｒａｒｅｅａｒｔｈｉｏｎｓｐｏｓｓｅｓｓｓｏｍｅｓｐｅｃｉａｌｆｕｎｃｔｉｏｎｓｉｎｂｉｏｃｈｅｍｉｓｔｒｙ .Ｔｈｅｙｃａｎｂｅｕｓｅｄａｓａｐｒｏｂｅｔｏｌａｂｅｌｔｈｅｃａｌｃｉｕｍｉｏｎ .Ｍｏｒｅｏｖｅｒ,ａｍｉｎｏａｃｉｄｓａｒｅｔｈｅｓｔｒｕｃｔｕｒｅｕｎｉｔｏｆｐｒｏｔｅｉｎｓ .Ｇａｏａｎｄｃｏｗｏｒｋｅｒｓｒｅｃｅ…     

氮磷混合肥料反应机理的研究

研究和生产混(复)合肥料已成为化肥工业的一个重要发展方向。特别是根据国内当前肥料工业现状,充分利用现有的肥料品种和原料来发展我国自己特有的混(复)合肥料,更会有其现实意义。我们研究利用碳铵与干制普钙(经一定温度干燥、磨细)配制氮磷混合肥料就是从这一实际出发的。经试验证明,这两种肥料混合不仅增加碳铵稳定性,而且防止了碳铵结块;1980年又经河北省栾城县农技站的200多亩小麦地的肥效试验,得到10％的增产效果。本文为给氮磷混合肥料生产提供理论依据,采用化学分析法测定了混肥中重要成分,並应用这些数据对碳铵与干制普钙混合后发生的反应机理进行了初步探讨。     

葡萄无籽化早熟生产技术及其经济效益分析研究

现在鲜食葡萄绝大多数有籽,吃起来很不方便,特别是在全国各地均有大面积栽种的巨峰葡萄[1](占葡萄种植面积的85%以上),不但坐果率差,而且大小粒现象严重、产量低、成熟在中期、经济效益差,以至于西安市灞桥区葡萄生产基地[2]有些果农开始砍葡萄.现将葡萄特别是巨峰葡萄进行无籽化[3～5,8～9]处理,不但坐果率很高,果粒均匀,穗形大而整齐紧凑,产量高,耐储运性强,而且成熟期由8月中下旬提前到7月上中旬,品质佳,经济效益显著,因此葡萄无籽化生产技术研究意义重大.     

Thermochemistry of Ternary Complex Dy(Et_2dtc)_3(phen)

The ternary solid complex was synthesized with sodium diethyldithiocarbamate (NaEt2dtc), 1,10-phenanthroline (phen) and low hydrated dysprosium chloride in absolute ethanol by improved method of reference. The title complex was identified as the general formula of Dy(Et2dtc)3(phen) by chemical and elemental analyses. IR spectrum of the complex shows that the Dy3 coordinated with six sulfur atoms of three NaEt2dtc and two nitrogen atoms of phen. It is assumed that the coordination number of Dy3 is eight.The enthalpy change of liquid-phase reaction of formation, ΔrHθm(l), is determined as (-19.091±0.015) kJ·mol-1 at 298.15 K by a microcalorimeter, and the enthalpy change of the solid-phase reaction of formation, ΔrHθm(s), is calculated as (139.641±0.482) kJ·mol-1 on the basis of a thermochemical cycle. The thermodynamic of reaction of formation was studied by changing the temperature of liquid-phase reaction. The constant-volume combustion energy of the complex, ΔcU, is determined as (-16730.21±9.25) kJ·mol-1 by a precise rotating-bomb calorimeter at 298.15 K. Its standard enthalpies of combustion, ΔcHθm, and standard enthalpies of formation, ΔfHθm, are calculated as (-16749.42±9.25) kJ·mol-1 and (-2019.68±10.19) kJ·mol-1, respectively.     

Thermochemical Properties of the Complexes RE(HSal)_3·2H_2O (RE=La,Ce,Pr,Nd,Sm)

Nowadays great attention has been paid to thelanthanide aromatic carboxylates owing to their novelstructures and potential applications in material sci-ences as superconductors ,magnetic materials ,andlu-minescent probes[1 ~6].The luminescence , mechanismof thermal descomposition , stability constants , andother properties of some lanthanide complexes withsalicylic acid have been reported in literatures[7 ~10].And thermochemistry of other lanthanide complexes hasbeen described[11 ,12]. Thermoc…     

硫代脯氨酸的热化学性质

用纯度为99.999%的量热基准苯甲酸标定了实验室建立的精密转动弹量热计,测定出硫代脯氨酸(tcH)的燃烧能为(-2469.30±1.44)kJ/mol,换算出其标准燃烧焓为(-2469.92±1.44)kJ/mol,计算出硫代脯氨酸的标准生成焓为(-401.33±1.54)kJ/mol。