家蚕微粒子病血清学检验技术的研究 Ⅲ—N.b碳素凝集反应用于原种母蛾检微

对700个母蛾用N.b碳素凝集反应法进行检微,碳检检出率为95.45%,对检的镜检检出率为22.72%.碳、镜检检出率的比值是4.2倍(即碳检有微数>镜检有微数);碳检发生的阳性反应样品,再用显微镜复检有微吻合率达100%,准确性大,误判率为零.检出微孢灵敏度高,最高N.b浓度是7.5×10~6个/ml,最低N.b浓度是2.5×10~3个/ml,可视为碳检700个母蛾批的检微浓度范围,以上数据证实用N.b致敏碳素检查母蛾微孢是可行的.     

离心机主轴形位公差选择标注及检测

介绍了碟式离心机的结构,分析了其传递动力和转动的零件—主轴的功用,选择标注了主轴的形位公差值并提出了单件生产中各项形位误差的现场检测方法。     

汽车车身模型表面点位测定的近景摄影测量方法

近景摄影测量是一种不接触物体而精确地测量物体的空间坐标及绘图的新型测量方法。本文简述了近景摄影测量的基本原理,通过对汽车模型外壳的近最摄影测量试验,绘制出汽车车身外形图和解算出模型点的空间坐标,其精度可达±0.302mm。研究表明,在汽车外型设计和品质检测中采用这种方法是行之有效的。     

The effect of the pH of meat on the boiling test

The effect of the pH on the boiling test was studied in 68 beef and 108 pork muscles. The pH had a significant effect on the sensory scores obtained from the boiling test. The effect was particularly pronounced in the odour of meat. In beef the odour scores remain steady for samples with a pH value under about 6.2 and start to increase rapidly in higher pH values. In pork the increase in scores appears to be linear. The odour observed in high pH meat was described by the judges as abnormal and ammonialike. In the case of meat with a high pH, the results of the boiling test at meat inspection should be interpreted with extreme caution.     

粮油检验的气相色谱法中微量注射器的使用方法

随着气相色谱在粮油检验中应用越来越广泛，要求操作才规范、熟练、正确地使用微量注射器，结合实际工作需要，叙述了微量注射器的使用方法以及保养和维修经验。     

A Slaughter Slab Survey for Extra-Intestinal Porcine Helminth Infections in Northern Tanzania

A survey on extra-intestinal porcine helminths was conducted at three slaughter slabs that receive pigs from Mbulu, a district endemic for porcine cysticercosis in northern Tanzania. Seventy carcases of pigs between 1 and 2 years old were examined between December 1997 and March 1998. The examination involved ante-mortem lingual examination for Taenia solium cysticercosis followed by post-mortem inspection. In addition, a laboratory procedure was performed to determine whether any of these domestic pigs were infected with Trichinella species. Parasites detected were Ascaris suum (44.3%), Echinococcus granulosus (4.3%) and Taenia hydatigena (1.4%). The lack of cases of porcine cysticercosis in this study compared to previous studies suggests that pig traders are conducting their own ante-mortem lingual examinations before purchasing pigs in the rural communities where the parasite is still highly prevalent. It is concluded that improved meat inspection could prove useful in reducing the local population's risk of infection with these parasites. The results of this study have revealed the parasites of agricultral and public health importance in the targeted communities. Further epidemiological investigations are required to better determine parasite prevalence and impact in order to formulate appropriate and cost-effective strategies for control.     

论食品检验准确性提高的控制因素

在食品检验过程中,应严格从检验流程的各个环节加以控制,从样品抽取、制备、校准仪器设备、配制试剂、选择检验方法及对相关检验项目的检查等几方面,确保获得准确的检验结果。     

非开挖NoPig检测技术发展现状与应用前景

NoPig技术是国外研发的一种新型非开挖地面检测技术,能够有效用于76.2～914.4mm直径的油、气、水等钢质管道腐蚀缺陷的在役无损检测作业。NoPig检测技术的基本工作原理是:在待测管段两端通以多成分谐波电流,测量管道上方的磁场,进而获得该电流的频谱和磁场的频谱;通过对比分析多成分谐波电流和磁场各同谱分量的比值,最终确定壁厚的异常变化范围。该技术目前已广泛应用于非开挖埋地油气管道的管体缺陷检测,德国Eon/Ruhrgas和VNG管道运营公司、澳大利亚RAG公司和Applus RTD公司已有应用实例。应用结果表明:该检测技术特别适用于无法清管的油气管道,对于管道缺陷的轴向定位具有较高的准确度,同时可极大降低检测工作难度,显著节省管道检测费用,具有广阔的应用前景。     

山东省2011年春季中标禽流感灭活疫苗质量检测及抗体消长规律分析

为了摸清山东省高致病性禽流感疫苗的质量情况,对2011年春季山东省3个中标厂家生产的重组禽流感病毒H5亚型二价灭活疫苗(H5N1,Re-5株+Re-4株)进行了质量检验和疫苗的抗体消长规律的跟踪。试验结果显示:除L厂家的2011010批次、G厂家的2011012批次有菌外,3个厂家的其余33批次灭活疫苗的物理性状、灭活检验和无菌检验均全部合格。免疫SPF鸡3周后,除Q厂家2011005批次疫苗外,其余34批疫苗HI抗体效价均≥6.0log2,产品达到质量标准要求。抗体消长规律实验表明,3个厂家的疫苗免疫SPF鸡4周即可达到高峰值,Re-4 HI抗体水平≥9.5log2,Re-5 HI抗体水平≥8.0log2,至25周时,仍维持在高抗体水平:Re-4 HI抗体水平≥9.0log2,Re-5 HI抗体水平≥7.8log2。从总的趋势看,L厂家的疫苗免疫抗体效价好于Q厂家和G厂家。     

质量控制图在土壤重金属的电感耦合等离子体发射光谱法测定中的应用

质量控制图是以高等数学的概率论及统计检验为理论基础而建立的一种既便于直观地判断分析质量又能全面、连续地反映分析测试结果的波动状况的图形,是用于常规检测质量控制的一种有效方法。将质量控制图和空白值的检验结合起来,不仅可以实现检出限的检验,而且可以动态地控制试验的各个方面的条件。该方法的推广运用可以提高实验室的分析测试和质量管理水平,保证数据质量。