高频电磁场对工人行为功能的影响

采用世界卫生组织推荐的神经行为核心测试组合（ＷＨＯ－ＮＣＴＢ），对高频作业工人４１名（平均工龄１３．９ａ（年）及年龄、性别、文化程度与接触组相匹配的对照组工人３９名（平均工龄１３．３ａ）分别进行了行为功能测试。结果表明高频作业工人部分情感状态得分和某些行为功能得分与对照组相比差异有显著性。长期接触高频电磁场可能引起工人情感状态改变，记忆力减退、注意力分散及心理运动稳定度下降。     

H^＋—ISFET的性能特点及应用研究

本文报道由我们研制的氢离子半导体传感器的性能特点，并与普通离子选择电极（玻璃电极）比较。Ｈ＾＋－ＩＳＦＥＴ具有体积小、取样少、快速、稳定、全固体化、不用预先活化等优点，对氢离子的敏感性也优于普通玻璃电极。本文还成功地将Ｈ＾＋－ＩＳＦＥＴ应用于有复杂成分并存的尿、血及其他生物材料的ｐＨ值测试，并改进胆碱酯酶活力测定方法，将Ｈ＾＋－ＩＳＦＥＴ应用于有机磷中毒后胆碱酯酶活力的快速定量测定。     

Certain characteristics of myocardial contractility of isovolumic dog heart at randomly variable heart rhythm

Summary The relationship heart rate-left ventricular pressure was investigated in the isolated canine heart perfused with constant pressure at different preloads. Rhythmical stimulation was performed with constant stimulus interval duration and with stimulus intervals randomly changed near the average value (150–200 stimuli in series).Correlation and dispersion function analysis show that rhythm dispersion had a negative inotropic effect which was independent of the preload of the ventricle in the range of 120–180 beat/min, but this dependence occurred with low rates of stimulation.This method is proposed for the assessment of contractility under conditions of heart rate variations (physiological and pathological arrhythmias).     

扩散法采集环境空气中氨

目的探讨采集氨的新方法方法采用扩散法将空气中氨采集在磷酸—甘油浸渍的无纺布吸收层上。结果采样速率为（１３７．６±８．４）ｍｌ／ｍｉｎ,与动力采样法现场对比测定,总不确定度为±１９．３％。结论采样器体积小、无噪声、操作方便,适于个体接触量与室内空气污染监测。     

选煤厂粉尘的职业危害与控制技术

目的通过对煤矿选煤厂粉尘职业危害的调研,找出关键控制点,并提出相应的控制技术。方法运作危害分析与关键控制点(HACCP)的原理,对选煤厂的生产工艺,作业环境进行现场调研,识别各种职业危害因素,从粉尘浓度、分散度及健康损失等方面了解职业危害的严重程度,并据此找出关键控制点,提出预防控制措施。结果选煤厂装卸、破碎、筛选工种粉尘危害相对较大。选煤厂粉尘的危害主要为煤尘,煤尘游离SiO2平均含量为4.9%。各地粉尘浓度差异较大,江西煤尘的平均浓度为250.8 mg/m3。选煤厂各工种均未检出尘肺病例,选煤厂尘肺病的危害少于煤矿其他工种。结论选煤厂部分工种粉尘浓度超标,对工人的潜在危害仍然存在,除加强管理外,要从8个方面改进降尘措施。     

Possibility of inducing glandular stomach cancer in rats exposed to asbestos.

The possibility of glandular stomach cancer being induced was studied in 75 random bred white rats exposed to chrysotile asbestos. A perforated polyethylene capsule containing 100 mg asbestos and filler (beef fat and natural wax mixture 1:1) was introduced in an artificial bag placed on the greater curvature of the stomach. A capsule containing filler only was introduced in a similar way in 40 control rats. In the following 25 months, 18 tumors of the stomach and abdominal cavity were found in the rats treated with asbestos (eight adenomas, two adenocarcinomas, one carcinosarcoma, one forestomach cancer, one intestinal adenocarcinoma, two peritoneal mesotheliomas, and three abdominal lymphoreticulosarcomas.) Among the control rats no such tumors were found. The results of the experiment are discussed in connection with epidemiological data on stomach cancer in asbestos workers.     

大鼠实验性矽肺血清血管紧张素Ⅰ转换酶活性探讨

The level of serum angiotensin-I-converting enzyme (SACE) activity on experimental silicosis in rats at different stages and under treatment with PVNO is reported. The results showed that levels of SACE in each dust groups begun to rise significantly higher than control groups as from the fifth day until 180th day (P less than 0.05). The levels of SACE of treatment groups with PVNO were significantly lower than the dust groups and similar to normal groups of the same age. It is suggested that SACE activity might be used as a reference index of silicosis.     

铊的特殊毒性研究

研究表明,碳酸铊剂量在0.48mg/kg以上能诱发小鼠骨髓细胞做核数增加;浓度为0.047mg/ml时,诱发体外培养细胞形态转化;剂量为0.83～2.5mg/kg的小鼠致畸试验结果,见胚胎吸收率和胸骨及枕骨缺失(或骨化不全)的胎鼠数明显高于对照组,但未见内脏和外观畸形。     

黄麻纺织女工肺通气功能调查

对214名黄麻纺织女工作肺通气功能测定结果显示，麻纺女工有较明显的急性肺功能损害，班后FEV1.0，FEV1．0％和MMEF明显低于班前（分别P＜0．01，0．05和0．05），但慢性肺功能损害则不明显，认为可能主要跟调查对象的接尘工龄较短（平均6．38年）有关．