工作场所空气中五氧化二磷离子色谱测定方法的研究

目的：建立工作场所空气中五氧化二磷的离子色谱测定方法。方法：本文采用吸收液采集工作场所空气中五氧化二磷，生成磷酸，经色谱柱分离，电导检测器检测，保留时间定性，峰高或峰面积定量。结果：工作场所空气中五氧化二磷的线性范围为0～4．0μg／ml；相关系数为0．9997；检出限为0．5μg／ml；若采集15L空气进行测定，则最低检出浓度为0．33mg／m^3；相对标准偏差为0．71％～3．68％；样品加标回收率为101．9％～105．5％；样品在室温下至少可保存1周。结论：此法灵敏度高，选择性好，干扰少，是检测工作场所空气中五氧化二磷的好方法。     

三种空气消毒方法效果的比较

目的：探讨理想的空气消毒方法及不同消毒方法对空气的消毒效果。方法：以微生物检验科无菌室中自然菌作为观察对象，用平板自然沉降法于消毒前及消毒后不同时段采样检测菌数并作细菌鉴定，用来比较紫外线、过氧乙酸和空气消毒洁净器对细菌室空气自然菌的杀菌效果。结果：三种消毒方法均能使空气细菌明显下降；过氧乙酸和空气洁净器消毒效果显著；空气洁净器能在日常检验工作中持续消毒杀菌；革兰阳性球菌和革兰阴性菌对三种消毒方法均敏感。结论：空气洁净器是较好的空气消毒方法。     

杭州市新居室室内空气甲醛污染状况调查

目的了解杭州市新装修居室内空气中甲醛污染状况。方法于2005年选择28套新装修住房,分别检测主卧室、儿童卧室、保姆或客房、客厅和书房室内空气中甲醛浓度。结果本市新装修居室内空气甲醛污染的超标率达25.00%,甲醛最高浓度为0.81mg/m3,是国家标准的8.1倍。在不同类型的房间中,以儿童卧室和书房较为严重。结论本市新装修居室内空气中污染严重,应引起人们的重视。     

老年机械通气患者气管内导管生物被膜形成状况的研究

目的：探讨老年机械通气患者气管内导管生物被膜的形成状况,明确相关性和危险因素.方法：分析22例老年患者的25个气管导管各留置时间段与细菌培养结果.结果：25个气管导管细菌培养阳性22个,占88%,培养阴性的3个,占12%.结论：细菌密度与气管插管时间密切相关,随着插管时间的延长,细菌计量明显增加.     

微型空气净化器的创新技术

近年来．随着新技术的大量涌入人类赖以生存的环境变得越来越恶化．尤其是“室内空气的污染”已成为危害人们健康的最重要的因素。综合调查研究结果显示，主要污染物分为3类；①可吸入颗粒；②微生物；③有害挥发气体。2年前我们研制出纳米光催化空气消毒器，已在各大医院推广应用，收到良好的效果．但仍有一定的缺陷。目前我们利用纳米级二氧化钛的强氧化作用．制作出具有光催化降解和吸附一体化功能的微型空气净化器．能在极短的时间内清除空气的污染，是办公室、病房、车内等小环境最有效、携带方便的空气净化器。该产品特点：①材料技术创新：采用新载体装载和单分子层稀土元素装饰纳米级二氧化钛；②结构技术创新：采用紫外LED作为紫外光源，将光波长由360纳米提升到400纳米，使机器体积缩小，寿命延长；③机器外观创新：微型带来创作的人性化。     

室内空气中苯的热解吸气相色谱测定法

目的建立了用热解吸气相色谱法测定室内空气中苯的方法。方法用活性炭管采集空气,将吸附管放入热解吸仪中加热,通氮气解吸出苯,用气相色谱仪FID检测器分析。结果采样量为20 L时,检出浓度为0.5μg/m3,样品回收率为94.6%~96.0%,相对标准偏差为1.83%~5.33%。并与国标方法进行了对比实验,经检验差异无显著性。结论该法操作简便,准确灵敏,适用于室内和工作场所空气中苯的测定。     

Utensil Swab Test

The effectiveness of the utensil swab test as part of the periodic inspection of food establishments was studied both as an indicator of cleanliness during the period between inspections and as an educational tool.

Two to seven samplings were taken at intervals of two to three months at 95 food establishments in rural areas in the northern part of Israel. A statistical analysis showed a high variation and almost no correlation between repeated samplings of the same establishment. Also, no trend to suggest an educational effect was found. We concluded that, though the swab test had proved to be useful in special projects, it had no value as part of the periodic sanitary inspections.     

Asbestos exposure and tuberculous pleurisy as developmental causes of progressive unilateral upper-lung field pulmonary fibrosis radiologically consistent with pleuroparenchymal fibroelastosis

BackgroundUnilateral upper-lung field pulmonary fibrosis (upper-PF), which is radiologically consistent with pleuroparenchymal fibroelastosis, develops after thoracic surgery. In most patients with unilateral upper-PF, aberrant intra-/extra thoracic air commonly emerges and an autopsy shows chronic pleuritis, which indicates that pleural involvement is associated with upper-PF development. If so, there may be patients with unilateral upper-PF who have a history of pleural involvement, including tuberculous pleurisy (TP) or asbestos exposure (AE). This study aimed to examine this supposition.MethodsWe examined the radiological reports of all consecutive patients from 2012 to 2018 to investigate whether there were patients having unilateral upper-PF and a history of TP or AE.ResultsEight patients were included in the study. Five patients had a history of TP, and the remaining three had that of AE. All patients were men and had respiratory symptoms, and seven patients presented with restrictive ventilatory impairment. The interval between TP or last AE and upper-PF development was long, with a median of over 20 years. The upper-PF lesion was commonly located in the right lung, and aberrant intrathoracic air was observed in five patients during their clinical course. Additionally, the upper-PF lesion transformed into a cystic lesion in six patients, which resulted in Aspergillus infection in two patients. The prognosis was poor, with a median overall survival of 38 months.ConclusionsUnilateral upper-PF developed even in patients with a history of pleural involvement. Our results indicate that pleural involvement plays an important role in the development of unilateral upper-PF.