Applicability of Modified Vialit Adhesion Test for Seal Treatment Specifications

The objective of this paper is to evaluate the Vialit Adhesion Test and its potential for use within performance oriented specifications for seal treatments. Multiple aggregates and emulsions are evaluated with existing test methods and with modified equipment and methods. The results indicate the current test tray is inadequate and that a thicker tray provides better results. Conditioning that incorporated either freeze times between 4 to 8 hours and/or freeze thaw cycles were also found to be improvements to the current conditioning methods. The specified mass of the steel spheres used during the test may be too restrictive in that more economical spheres were tested and did not show differences in aggregate loss.

Applicability of Community Periodontal Index Teeth and Random Half-mouth Examination to Gingival Bleeding Assessment in Untreated Adult Population in Beijing

Objective To assess whether Community Periodontal Index (CPI) teeth and random half-mouth methods are representative of full-mouth method in gingival bleeding examination. Methods Data from 1000 untreated adults (age > 18) collected in Beijing from January 2000 to January 2001 were utilized in the analysis. Half of the subjects were examined by Gingival Bleeding Index (GBI) and the other half by Sulcus Bleeding Index (SBI). The data were sorted out and calculated according to CPI teeth and random half-mouth teeth methods. The results of the 2 methods were separately compared with those of full-mouth examination. Results There was a significant difference between CPI teeth method and full-mouth examination (P<0.05) in both GBI and SBI. In contrast, compared with full-mouth examination, significant difference was not observed in diagonal or ipsilateral half-mouth results in SBI (P>0.05), nor in diagonal half-mouth results in GBI (P>0.05) Conclusions The results of CPI teeth method on gingival bleeding could not reflect the full-mouth situation. Ipsilateral and diagonal half-mouth results can serve as a substitute for full-mouth results in SBI, while diagonal half-mouth results in GBI.

机械设备安装试运行故障情况分析

在工程机械设备安装完毕后,在实际使用中,由于设备在试运行时经常会发生一些意外状况,从而导致电动机的起动失效,造成跳闸。在大容量电机中,这一现象更为频繁。为方便事故后的事后分析,我们必须在电动机起动前做好前期的准备工作,并根据检测结果对其进行分析。本文着重对电机的启动故障进行了分析,并对故障产生的原因和应对措施进行了分析。

消炎止痛膏中国药典2020年版微生物限度检查方法的建立

按照《中国药典》总则1105、1106、1107 2020版的规定,是基于含中药材的医院中药材消炎镇痛药微生物限制试验方法的应用试验。方法:采用金黄色葡萄球菌、铜绿假单孔、芽孢杆菌、白色念珠菌、黑色曲霉菌等阳性菌株进行检测。结果:采用常规法、稀释法以上五种试验菌的回收率比值均符合相关规定,金黄色葡萄球菌和铜绿假单胞菌能正常检出。结论:消炎止痛膏按照新版药典的微生物限度标准采用常规法和稀释法进行微生物限度检查,能够客观地反映制剂中微生物污染程度,达到检查目的。