漠阳江水环境质量现状分析

为保护漠阳江水环境和保护饮用水源,对漠阳江水质基本情况展开调查,摸清漠阳江及其主要支流水环境质量现状。调查发现,漠阳江源头水质较好,但随着漠阳江经阳春城区和阳江城区后,水质有所恶化。分析原因,漠阳江目前最主要的污染源为生活污水。针对该情况,本文提出了漠阳江整治的相应建议。     

强化企务公开促进企业和谐——试论企务公开在构筑和谐劳动关系中的作用

企务公开是我国法律法规明文规定的保障职工权益的企业义务之一,它在构筑和谐劳动关系中的作用不容忽视.本文对此浅谈几点个人看法.     

The model of defense gene expression induced by signaling molecule β-ocimene

β-ocimene, a kind of monoterpene, was found recently as a plant communication signal molecule. It has two isomeric forms in nature: cis-β-ocimene and trans-β-ocimene. According to recent reports, all investigated plants, such as corn, cotton, lima bean, potato, tobacco, arabidopsis, and Mediterranean pine, could release the chemical component β-ocimene after fed by arthropod herbivores,     

开口箭中甾体皂甙元含量的测定

利用香草醛—高氯酸作为显色剂，使用可见分光光度法测定了神农架民间习用药物开口箭中甾体皂甙元的含量。     

Research on subsidence method aided by water injection and its engineering application for the north anchor of Taizhou Bridge

The north anchorage caisson of Taizhou Bridge encountered some difficulties during the sinking process for the large sidewall frictional resistances. To solve this problem, a new concept and method called subsidence method aided by water injection is proposed. Numeral analysis is adopted to simulate the effects of this method for the north anchor of Taizhou Bridge, which confirmed the feasibility and validity. Finally, the method is applied to the north anchor caisson during the caisson sinking procedure and helps the caisson sink and embed to the designed position smoothly.     

The multifaceted role of periostin in tumorigenesis

Periostin, also called osteoblast-specific factor 2 (OSF-2), is a member of the fasciclin family and a disulfide-linked cell adhesion protein that has been shown to be expressed preferentially in the periosteum and periodontal ligaments, where it acts as a critical regulator of bone and tooth formation and maintenance. Furthermore, periostin plays an important role in cardiac development. Recent clinical evidence has also revealed that periostin is involved in the development of various tumors, such as breast, lung, colon, pancreatic, and ovarian cancers. Periostin interacts with multiple cell-surface receptors, most notably integrins, and signals mainly via the PI3-K/Akt and other pathways to promote cancer cell survival, epithelial–mesenchymal transition (EMT), invasion, and metastasis. In this review, aspects related to the function of periostin in tumorigenesis are summarized.     

几何造型中的裁剪曲面

在深入研究裁剪曲面的基础上，本文引入３种关于裁剪曲面的规范化操作及相应的逆操作，并运用扩展的欧拉公式给予合理性验证，并进一步提出了构造裁剪曲面几何（ＣＴＳＧ）这一概念，探索边界表示向构造实体几何（ＣＳＧ）转换的新途径。     

平台印刷机主运动补偿凸轮的CAD

从凸轮补偿值的精确计算入手。用HP9000/330计算机精确设计补偿凸轮的理论和实际廓线。并给出用线切割机加工该凸轮时钼丝中心轨迹的精确计算值。便于编程进行该凸轮的精确加工。     

Preparation of Zn-doped TiO2 nanotubes electrode and its application in pentachlorophenol photoelectrocatalytic degradation

Zn-doped titanium oxide （TiO2） nanotubes electrode was prepared on a titanium plate by direct anodic oxidation and immersing method in sequence. Field emission scanning electron microscopy （FESEM） showed that the Zn-doped TiO2 nanotubes were well aligned and organized into high density uniform arrays with diameter ranging from 50 to 90 nm. The length and the thickness were about 200 and 15 nm respectively. TiO2 anatase phase was identified by X-ray diffraction （XRD）. X-ray photoelectronspectroscopy （XPS） indicated that Zn ions were mainly located on the surface of TiO2 nanotubes in form of ZnO clusters. Compared with TiO2 nanotubes electrode, about 20 nm red shift in the spectrum of UV-vis absorption was observed. The degradation of pentachlorophenol （PCP） in aqueous solution under the same condition （initial concentration of PCP： 20 mg/L; concentration of Na2SO4：0.01 mol/L and pH： 7.03） was carried out using Zn-doped TiO2 nanotubes electrode and TiO2 nanotubes electrode. The degradation rates of PCP using Zn-doped TiO2 nanotubes electrode were found to be twice and 5.8 times as high as that using TiO2 nanotubes electrode by UV radiation （400 μw/cm^2） and visible light radiation （4500 μw/cm^2）, respectively. 73.5% of PCP was removed using Zn-doped TiO2 nanotubes electrode against 45.5% removed using TiO2 nanotubes electrode in 120 min under UV radiation. While under visible light radiation, the degradation efficiency of PCP was 18.4% using Zn-doped TiO2 nanotubes electrode against 3.2% using TiO2 nanotubes electrode in 120 min. The optimum concentration of Zn doping was found to be 0.909%. The PCP degradation efficiencies of the 10 repeated experiments by Zn-doped TiO2 nanotubes electrode were rather stable with the deviation within 3.0%.     

快干型复合淀粉粘合剂的研制

在改性淀粉中加入适量聚乙烯醇和脲醛树脂等水溶性高聚物，并加入适量填和催化干剂，可制得稳定性好，粘接强度高，干燥时间短而成本低谦的复合淀粉粘剂。