应用化学

The purpose of the examinatorial and designing analytical chemistry experiments is to develop students' abilities of utilizing the learned knowledge on analytical chemistry to solve the problems on experiment and improve their comprehensive abilities and skills in analytical chemistry.

分析化学实验是我校应用化学专业、食品分析专业、生物技术专业、动物医学专业和动物科学专业等学生必修的专业主干课，它的开设为培养和训练学生具有较强的科学实验能力和逻辑思维能力、分析问题和解决问题的能力，及具有良好的科研素质奠定了基础。

The glyoxal and glyoxalic acid contents in the solution of oxidation of acetaldehyde to glyoxal by nitric acid were determined by this method, the repeatabilities of analysis results were excellent and the relative error compared to chemical analysis of glyoxal was 1.77%.

用HPLC测定乙醛硝酸氧化法制乙二醛反应液中乙二醛和乙醛酸的含量，结果的重复性好；对乙二醛的测定结果与应用化学分析法测定结果的平均相对误差为1.77%；对反应液中乙二醛、乙醛酸含量的测定有着较高的加标回收率，分别为99.6%～103.3%和98.1%～102.4%。

It was paid more and more attention to preconcentrate and separate trace-level pollutants in the water, represented by polycyclic aromatic hydrocarbons, while the environment protection becomes more and more important.

上海交通大学，应用化学，2008年，博士

College of Biological Engineering, Changchun Univerestry of Technicology, Changchun 130012, China

中国科学院长春应用化学研究所高分子工程实验室，长春 130022

It is an effective way to use chemical hybridizing agents to produce hybrid seed in wheat.

应用化学杂交剂诱导雄性不育是小麦杂种优势利用中一条重要而简捷的途径。

But even the mosquito has been subdued by attention to drainage and by chemical sprays.

但即使是蚊子，也已被注意排水和应用化学喷剂所征服。

In this ***,nano-particles of NiCuZn ferrites powders were prepared with nickel nitrate,zinc sulfate,copper sulfate and ferrous sulfate as starting materials and ammonium oxalate as the precipitator by employing co-precipitation technique using oxalate precursors.Excellent composition uniformity NiCuZn ferrite powder can be obtained after drying and calcination.Toroidal samples were obtained after being formed and sintered.

本文以硫酸镍、硫酸铜、硫酸锌、硫酸亚铁和草酸铵为原料，应用化学共沉淀法制得分布均匀的先驱粉，经烘干、煅烧制成成分均匀性极佳的NiCuZn铁氧体粉末，再经成形和烧结等工艺，最后制得环形NiCuZn铁氧体材料。

EF and CMB receptor model was used to make source apportiontment of dustfall. The results showed that the main sources of dustfall in Changchun was natural source. Coal smoke dust and automotive exhaust dust were main source from human being.

应用化学质量平衡法和富集因子法对降尘进行来源解析的结果表明，长春市大气降尘来源以自然源即土壤风沙尘为主，人为源主要是燃煤尘和汽车尾气尘。

Methods Tumor tissue was implanted into the fat pad of mammary gland of the nude mice, which were randomized to groups A, B and C when the tumor reached a certain size.

目的 探讨应用化学修饰的小干扰RNA沉默人裸鼠乳癌移植瘤新生血管中的血管内皮生长因子受体1（VEGFR1）基因对移植瘤生长的影响。

Male sterility of wheat inducing by Chemical hybridization agents is one of the main ways to produce hybrid wheat seed.

应用化学杂交剂诱导雄性不育是小麦杂种优势利用的重要途径之一。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。