诱导水解法制备微细高分散金红石型二氧化钛

采用加热TiCl4稀溶液的方式,制备晶种,将其导入一定浓度的TiCl4溶液中进行诱导水解。所得的偏钛酸经干燥、煅烧后得到分散性好,D50为1 mm以下,金红石含量为≥95%的高纯TiO2,可用于生产PTC热敏电阻等铁电陶瓷。     

莲心中可溶性成分的有效提取

采用不同的原料处理,改变提取的流程和提取时间，测定不同条件下所得提取液的可见吸收光谱，以此反映各提取液的组分和浓度是否发生变化，并比较在最大吸收波长下各提取液的吸光度大小，从而确定将莲心捣碎后，加热回流时间为60min的提取方法效果最佳。     

种分Δαk与种分首槽αk的关系

针对烧结法和拜尔法种分槽的 Δαk 变化进行了概述 ,阐述了种分 Δαk 与种分首槽 αk 的关系。     

Mapping nonnative plants using hyperspectral imagery

Nonnative plant species are causing enormous ecological and environmental impacts from local to global scale. Remote sensing images have had mixed success in providing spatial information on land cover characteristics to land managers that increase effective management of invasions into native habitats. However, there has been limited evaluation of the use of hyperspectral data and processing techniques for mapping specific invasive species based on their spectral characteristics. This research evaluated three different methods of processing hyperspectral imagery: minimum noise fraction (MNF), continuum removal, and band ratio indices for mapping iceplant (Carpobrotus edulis) and jubata grass (Cortaderia jubata) in California's coastal habitat. Validation with field sampling data showed high mapping accuracies for all methods for identifying presence or absence of iceplant (97%), with the MNF procedure producing the highest accuracy (55%) when the classes were divided into four different densities of iceplant.     

复合沉淀氯化镨钕工艺研究

针对草酸沉淀成本高的问题，提出了复合沉淀的方法，试验结果及生产应用都证明了此方法能达到降耗同效的目的。     

Trypsin inhibitor activity of soybean as affected by genotype and fertilisation

The presence of protease inhibitors in soybean prohibits the utilisation of the raw beans for food and feed. However, little information is available about environmental influences and the effects of nitrogen and sulphur supply on the antinutritional constituents of soybean. As these factors may influence protease inhibitors, soybean genotypes segregated according to the presence or absence of the Kunitz trypsin inhibitor have been evaluated for trypsin inhibitor activity (TIA) in field trials. TIA was affected significantly by environment (geographical location), fertilisation treatment and genotype. Environmental means of TIA were between 69.5 and 104.8 mg g^?1. Nitrogen application, which caused an increase in seed protein content, resulted in a reduction in TIA by about 15% as compared with the control. Remarkably, simultaneous application of nitrogen and sulphur in the form of ammonium sulphate had a similar reductive effect on TIA to that of nitrogen application alone, although soybean protease inhibitors are rich in sulphur amino acids. Significant genetic variation in TIA was found both within the genotype class with the Kunitz inhibitor present as well as within the class lacking this inhibitor. The results suggest that TIA of soybean may be modified considerably by genetic improvement and appropriate agronomic management. Copyright © 2003 Society of Chemical Industry     

高纯超细氧化铝的制备

介绍一种利用氧化铝生产过程的中间物料———铝酸钠溶液 ,生产高纯超细氧化铝的方法 ,即利用钡盐净化铝酸钠溶液 ,得到A/S >10 0 0 0的精制溶液 ,再进行种分分解 ,得到超细Al(OH) 3 ,经过酸洗 ,最终得到纯度达 99 99% ,粒度 90 %小于 2 μm高纯超细氧化铝。     

宽流道板式换热器在氧化铝生产种子分解过程中的应用

介绍了宽流道板式换热器的结构、特点及在氧化铝生产种子分解过程中的应用。     

安居水电厂灯泡贯流式水轮发电机组的试运行

本文对安居水电厂2台灯泡贯流式水轮发电机组自投入试运行以来,出现的受油器壳体开裂、导叶接力器缸体和活塞拉伤、转轮桨叶传动拐臂连接销脱落、导叶外轴承座漏水、主轴工作密封漏水侵入水导轴承、锁锭装置固定螺钉剪断等故障的经过、原因分析及其处理办法进行了叙述。     

防止减速器“跑,冒,漏”油的几种新方法

介绍了防止减速器“跑，冒，漏”油的几种新方法。