NaHCO3基微晶粉喷射清理技术研究

选用铝合金和高温合金零件为研究对象,以NaHCO_3基微晶粉为喷射介质,利用喷砂设备对其表面污层进行喷射清理。利用光学显微镜、扫描电镜、EDS等分析技术,对喷射清理后的表面形貌、成分进行分析;利用粗糙度仪观察清理后的表面粗糙度。结果表明:采用NaHCO_3基微晶粉喷射清理技术能有效去除零件表面积碳、油污、氧化物等污层;采用NaHCO_3基介质清理后,零件表面粗糙度仅为传统喷砂介质清理后粗糙度的10%,对零件表面损伤较小。     

涂刷有机硅的道路混凝土抗盐冻性能研究

为了配制高抗盐冻的高性能道路混凝土,自行配制有机硅涂料,并参照CDF混凝土抗盐冻试验方法,研究涂刷有机硅涂料的高性能道路混凝土的抗盐冻性能.结果表明,涂刷该有机硅涂料后,3种水灰比(0.40、0.36和0.32)的高性能混凝土经56次盐冻后剥蚀量均降低了99%以上,相对动弹性模量损失率降低了32%～42%,混凝土表面无明显剥蚀痕迹,显著地提高了高性能道路混凝土的抗盐冻性能,配制出了高抗盐冻的高性能道路混凝土.     

Optimum Design of Sewage Sludge Consolidation Tanks

Consolidation is potentially the most cost-effective of all sludge treatment processes. However, traditional design procedures have been oversimplified such that the process has not generally been fully exploited.
The objective of this report is to summarize the Water Research Centre (WRc) procedure for sizing sewage sludge consolidation tanks, and explain the major design aspects which control the effective operation of the plant. The procedure provides a means of sizing tanks to consolidate any particular sewage sludge to any solids concentrations up to the maximum, and is applicable to both the batch and continuous operational modes. To obtain the predicted performance, the essential equipment such as the picket fence and control system, comprising a consolidation plant, must be suitably designed.     

Nitric oxide synthase inhibition in a spontaneously hypertensive rat model of diabetic nephropathy

Squamous odontogenic tumour is a benign odontogenic tumour composed of a well-differentiated squamous epithelium immersed in a fibrous connective tissue stroma. It is a rare tumour and a recent literature review yielded only 36 cases. Two cases of squamous odontogenic tumour are presented, 1 located in the maxilla and the other in the mandible: 1 of these cases showed a periodontal involvement. The radiographic picture was fairly characteristic in 1 case, with a radiolucent lesion between the roots of the second mandibular premolar and the first molar, while, in the other case, it was possible to observe the presence of a lesion located at the apex of a molar. The tumours were enucleated, and no recurrences were observed after 5 years.     

Data sources for pharmacoeconomic and health services research

Different types of databases available for health-related research, the data contained in these databases, and potential applications for pharmacists or researchers are discussed. Case studies that demonstrate uses for health databases are presented. Databases can be organized by facility, by health care provider, by disease or organ, or by sector. The types of data they contain include financial data, utilization data, demographic data, and outcomes data. Data can be obtained from the public sector, the private sector, or the researcher's own health system. The costs and time associated with using existing databases are often less than those required to collect data, but the quality and accessibility of the data must also be considered. The researcher's choice of database will depend on the research question. Health care databases can be used for health management and decision-making, quality review and evaluation, outcomes research, episode-of-illness studies, and evaluation of treatment protocols. Researchers must comply with patient-confidentiality and other agreements when accessing data. The format of the data needs to be matched with the hardware and software to be used in the analysis, and the data need to be loaded, verified, and cleaned before use. In deciding which of the many available data sources to use, researchers must determine the appropriate balance between external data and data available within their own health systems. The decision on whether to use existing data sources or to collect data prospectively will depend on the research question, the available resources, and the scope of the study.