化学纯

1 Background of it: Handmade Cloth Shoe of Many-layer Tread of "Tugada Brand" was made of tread from cotton culico of 30 or so layers through handwork stitch, of upper from high grade cloth like "Canonicals Wool", and "Spring Breese Wool" after 10 or more working procedures of shoe-making. The most notable feature for this kind of shoes is air free and sweat absorbable. Wearing them may facilitate the stretch and adaptability of feet to their surroundings. Therefore, care to one's foot may be realized. Whole production procedure for this shoe is free from any chemical substance, and it belongs to one thoroughly natural production manner. These shoes have combined the skill, comfortable, and air free to one purpose of health care with character of cold-proof in winter and heat-insulation in summer.

项目背景："土疙瘩"牌手工千层底手工布鞋由30余层纯棉白布合成袼褙，经手工麻绳衲制，鞋帮是由"礼服呢"、"春风呢"等高档布料经过十余道工序精细雕琢而成，手工布鞋最显著的特点就是透气、吸汗性强，能够增强足部对周围的伸展性和适应性，实现对人体足部的保养，整个制作过程不含任何化学成分，是一种纯自然的制作流程，一种融工艺性、舒适性、透气性养身保健为一体，冬季御寒、夏季隔热。

Using H2SO4 as acidulant,chromic sulfate with high purity was obtained by crystallization,which was applied to leather industry as chrome tanning agent .

将电镀废水中的六价铬还原成Cr，用化学沉淀法和絮凝法将其转化为Cr3沉淀，通过硫酸酸化，结晶为高纯硫酸铬，作为皮革工业的铬鞣剂。

The influence of element of cobalt on Jahn-Teller of LiMn2O4 was discussed in the viewpoint of structural chemistry.

从结构化学的角度探讨了添加的钴元素对纯相LiMn2O4的Jahn-Teller效应的影响。

Theoretical Part: Through theoretical analysis of chemothermodynamics, combustion and engineering thermodynamics, factors that affect explosion limit were determined, which include temperature, pressure, spark ignition energy, electrode shape, direction of flame propagation and size of explosion vessel.

理论部分：根据化学热力学、燃烧学和工程热力学的基础理论，从本质上定性地分析了爆炸极限的影响因素，包括温度、压力、爆炸容器的大小、点火能量大小、以及火焰传播方向等，得出了这些影响因素对爆炸极限的影响规律，以确保实验有完整的理论基础指导；在此基础上本文提出了一种新的推算在常温常压下可燃性纯质和混合工质制冷剂爆炸极限浓度的理论方法，该方法由可燃性气体的化学组成来推算上下限浓度，不需要其它条件；对混合工质制冷剂，只要再知道混合配比，即可以推算出爆炸极限，使预测爆炸极限的工作更简单、方便。

And the application of chemometrics in complicated biochemical system can solve some problems and obtain the equilibrium concentration and pure spectra of each component. This thesis is divided into five parts: Part I In part one, firstly, the structures, functions and natures of proteins were introduced briefly.

本论文尝试将化学计量学方法多元曲线分辨-交替最小二乘法用于解析实验得到的光谱数据，讨论了方法的原理和实际应用，并探讨了化学计量学在复杂的生物化学体系中实现同时解析多组分平衡浓度和纯光谱的可行性。

This dissertation is concerned with the spectroscopic study of the millimeter-wave, near infrared and visible absorption spectrum of gas phase transient species.

本论文对与星际化学和大气化学密切相关的几种瞬态分子的气相吸收光谱和结构进行了研究，包括CN自由基，N_2~+离子和CS~+离子的电子振转光谱和HCBr自由基的纯转动光谱。

With high efficiency, high selectivity, security and environmental friendship, the biocatalysis possesses significant advantages over chemical catalysis in organic synthesis, especially in the asymmetric synthesis of the enantiomerically pure compounds and in the resolution of racemates.

生物催化的高效性、选择性、安全性以及环境友好等优点，使其在一些化学合成领域，特别是在对映体纯的手性化合物的合成和消旋体拆分等方面，具有化学催化不可比拟的优势。

These phenomena suggest that the binding site of Zn~(2+) in the purine base of ATP is Nl at low pH and N7 at high pH and contrast to the adenosine-Zn~(2+) system where the purine base binds Zn~(2+) with N7 at low pH while with Nl at high pH.

为进一步证明上述观点，我们研究了Zn~(2+)与ATP的作用。发现加入Zn~(2+)时ATP溶液与纯ATP溶液在同一酸度下~(15)N化学位移的变化为：在高酸度(2＜pH＜5)，N-1化学位移差大于10ppm，在pH=3.73时，相差高达25ppm。

Pure magnesium was treated by A. C. treatment technique in 0.25mol/L NaZSO4+0.1mol/L NAOH solution. The surface morphology was observed by scanning electron microscopy. The contact angle of the treated surface of pure Mg was measured by the First Ten Angstroms instrument and then its surface free energy can be calculated. The effect of alternating current treatment on the corrosion resistance of the pure magnesium was studied through electrochemical methods in 0.05mol/L NACI+0.01mol/L NAOH solution. The experimental results showed that a uniform and perfect oxide film was formed after A.

采用载波处理方法，用0.25mol/L Na2SO4+0.1mol/L NAOH作为载波处理溶液，对纯镁试样进行载波处理，通过正交试验确定载波处理的最佳工艺参数；用扫描电了显微镜观察载波处理后试样的表面形貌；用First Ten Angstroms仪器测量蒸馏水纯镁的接触角并计算出表面能；用电化学方法研究了在0.05 mol/L NACI+0.01mol/L NAOH溶液中载波处理对纯镁耐蚀性能的影响。

Methods:The difference of PTH gene and protein expression in parathyroid gland and thymus were compared between PTH knock-out mice 1αase knock-out mice and their wild-type littermates at 2 weeks of ages by RT-PCR,real-time PCR and immunohistohemistry.

real-time PCR和免疫组织化学的方法比较分析同窝2周龄PTH基因敲除纯合子和野生型小鼠以及1-α羟化酶基因敲除纯合子[1αase-/-]和野生型小鼠的甲状旁腺和胸腺的PTH表达差异？

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。