Ni掺杂中孔TiO2的合成及其光催化分解水性能研究

合成了Ni掺杂中孔TiO2光催化剂，其吸收光谱阈值红移至500nm，500℃焙烧后依然保持中孔结构．喇曼光谱证实，这种催化剂具有锐钛矿晶型．在Na2S／Na2SO3复合牺牲剂体系下，对Ni掺杂中孔TiO2和Ni掺杂颗粒TiO2两种催化剂的产氢活性进行了考察，发现前者比后者提高了近1倍。     

棉花光合特性研究(综述)

本文阐述了棉花光合特性的研究进展概况，并对棉花产量、冠层结构与光合特性的关系研究加以概括。     

紫色土彩色图像的H阈值分割

【目的】将研究对象紫色土自然断面图像从复杂背景中分割出来,以消除复杂背景的影响,为对紫色土视觉图像进一步分析处理、识别打下基础。【方法】通过对紫色土自然断面图像统计分析,证明它的H域有良好的聚集特征,且在95%和97%置信点近似于正态分布;因此,根据正态分布确定紫色土壤自然断面的H阈值,分割紫色土壤自然断面图像。【结果】用获得的二值分割图像与原图像计算哈达玛积,分割提取出了完整的紫色土自然断面区域图像。【结论】算法分析及仿真实验显示:相对于对比算法,新的算法分割速度更快,分割提取出的紫色土自然断面图像更完整;该算法有效。     

丙硫咪唑早期和重复治疗猪细颈囊尾幼病及增重试验

采用丙硫咪唑粉剂按90mg/kg 剂量间隔48小时三次口服投药治疗早期感染细颈囊尾蚴猪(感染30日龄),结果表明是安全、有效的,驱(杀)虫率高达99.7%,死虫完全吸收,与对照组比较,治疗组日增重和屠宰率均有明显提高(P<0.01),可进行扩大治疗试验.     

油井管接头螺纹腐蚀与防护研究进展

油井管作为油气田开采过程中的基础设施,随着油气田的不断深入开发,油气井的实际开采环境越来越恶劣,其接头螺纹连接处的腐蚀失效问题日益突出和严重.为保障井筒完整性,提高油井管的使用寿命,对几种典型的油井管接头螺纹腐蚀类型进行了介绍,详细分析和综述了其腐蚀机理和影响因素.针对文中介绍的腐蚀类型,对其腐蚀防护技术进行了系统性的...     

Study on the biomass change derived from the hyperspectral data of cotton leaves in canopy under moisture stress

In this study, an ASD spectrometer made in USA is used to derive the hyperspectral data of cotton leaves in canopy in north Xinjiang. The integral area variables of red edge are used to estimate the total nitrogen (TN) content in cotton leaves in canopy. The first order differential of reflective spectra is carried out. The analysis methods based on the spectral position variables are derived from the first order differential spectral data. The analysis on the correlation between the integral area of red edge (SDr, regarded as the independent variable) and the TN content (regarded as the function) is carried out, and the correlation mathematical model between the integral area of red edge and the TN content in canopy leaves of cotton varieties named as Xinluzao No.6 is developed. The analysis on the correlation between the chlorophyll content and the TN content in single cotton leaves in canopy growing under the irrigation with different water volumes is carried out. The results show that there is a significant positive correlation between the chlorophyll content and the TN content (R = 0.8723, n = 39), and the data of chlorophyll content can be used to estimate the TN content in single cotton leaves; the correlation between the integral area variable of red edge and the TN content in cotton leaves in canopy is significant, their correlation coefficient is 0.7394 (n = 40), the TN contents in canopy leaves of cotton varieties named as Xinluzao No. 6 and No. 8 can be accurately estimated by using the developed model, and their RMSE values are 0.3859 and 0.4272 respectively. After researching, it is considered that there is an applying potential to use the integral area variables of red edge for estimating the TN content in cotton leaves in canopy, and the mathematical model developed with the third-side area variables has a high applying value in deriving the TN content in crop canopy. It is also considered that it is feasible to recognize the moisture stress suffered by cotton plants by researching the shift and change extent of red edge, and the key is to develop the corresponding rational recognition index system.

     

水热法合成Ni掺杂纳米Cd0.1 Zn0.9 S固溶体及其产氢性能

以水热法合成了Ni掺杂的纳米Cd0.1Zn0.9S固溶体光催化剂,采用分光光度计、X射线衍射仪和比表面及孔径分析仪对光催化剂结构进行表征,考察了Ni掺杂量(质量分数)对固溶体晶型结构及光催化性能的影响,发现Ni掺杂可以使催化剂吸收边红移、晶体粒径减小、比表面积增大.可见光产氢实验研究表明,最佳的Ni掺杂量为0.1%,此时光催化剂产氢活性达到最大.对该光催化剂负载Pt可以进一步提高其活性,当w(Pt)为0.6%时,产氢速率能够达到117 ìmol/h.     

石河子垦区复种油用向日葵的生态适应性分析

北疆沿天山一带用早熟冬小麦复种早熟油葵一年两熟，是近年才出现的耕作制度改革。其中深入分析复种油葵的生态适应性，尤其是灌浆阶段的耐寒能力的生态适应性，是推进改制的重要问题。北疆沿天山一带８月下旬至１０月上旬的气候条件，能基本适合早熟油葵灌浆的要求，但也需要油葵能适应秋季降温快、早霜期不稳定的缺陷。经研究，油葵在日最低气温０℃以上的冷凉气候下仍能继续灌浆，能忍受－２℃左右的早霜冻，霜后转暖仍可继续灌浆成熟，表现出对本地区良好的气候生态适应性，成为油葵复种技术的生态基础。     

原子吸收法测定三叶木通果皮中锌铅铬含量

用浓硝酸-高氯酸微波消解三叶木通果皮,用原子吸收分光光度法测定果皮中锌、铅和铬的含量.实验结果表明,锌、铅、铬3种重金属质量分数大小顺序为w（Zn）＞w（Pb）＞w（Cr）,其值分别为9.084×10^-3%,6.868×10^-3%,3.241×10^-3%,加标回收率分别为100.24%,99.87%,101.01%,相对标准偏差（RSD）分别为1.23%,1.22%,1.91%.该方法用于测定三叶木通果皮中锌铅铬含量,测定结果的准确度和回收率高,精密度和重复性好,具有良好的应用价值.     

间接血凝试验(IHA)诊断猪细颈囊尾蚴病的研究

作者将IHA用于诊断猪细颈囊尾蚴病,并在某些环节进行了改进,筛选出较为理想的浓缩提纯囊液抗原。检测147头份阳性猪血清,符合率为95.2％,检测53头份阴性猪血清,符合率为91％。试验表明,用IHA诊断猪细颈囊尾蚴病具有特异性,并有敏感、准确及快速的优点,为早期诊断猪细颈囊尾蚴病提供了一种新的手段。