564名医用诊断X线工作人员眼晶状体检查结果分析

眼晶状体对X射线是敏感器官之一，长期小剂量的X射线外照射，可引起眼晶状体混浊、视力减退，为了解扬州市医用诊断X线工作人员眼晶状体的损伤情况，我们对564名医用诊断X线工作人员眼晶状体进行检查，检查结果报告如下：     

电离辐射防护涂料的研究

针对电离辐射的危害及防护,重点介绍了具有吸收、屏蔽射线功能的防辐射涂料的构成及要求。报导了一种对χ—射线(γ—射线)具有良好的屏蔽、吸收功能的涂料的研制过程和测试结果。该涂料由一种单相、均匀、化学性质稳定、分散性能优良、有较优的屏蔽能力的无机固熔体填料,配以经改性的耐高温骨架材料而构成。该涂料施工方便、涂膜光亮、无公害,可望在广泛的领域内有大的应用前景。     

我国压力容器标准与ASME规范中射线检测的比较分析

对我国压力容器标准和ASME规范对射线检测的要求进行比较，简要阐述了两种不同标准对射线检测要求的不同，旨在和相关人士探讨如何深入理解和使用ASME规范对射线检测的要求。     

在用压力容器射线底片缺陷位置的判断

在用压力容器的定期检验中，经常涉及到对压力容器焊缝的射线检测：在发现焊缝存在超标缺陷时，需对焊缝缺陷进行消除处理，由此需对焊缝中缺陷位置进行准确的判断。由于射线检测与超声波检测机理不同．射线检测不能象超声波检测那样直接确定缺陷深度．因此在射线底片上判断缺陷的位置，全凭探伤评片人员的经验判断，一般来说可以从阱下四个方面考虑分析。     

放射性同位素与射线装置安全和防护条例

第一条 为了加强对放射性同位素、射线装置安全和防护的监督管理，促进放射性同位素、射线装置的安全应用，保障人体健康，保护环境，制定本条例。     

输气管道焊接工艺评定和焊缝射线检测存在问题及对策

从2003年8月起，我所对靖（边）西（安）输气管道扩建工程压力管道安装进行安全性能监督检验。通过近几年的监检实践，我们认为，目前在输气管道焊接工艺评定及焊缝射线检测方面尚存在一些问题，必须引起管道的设计、安装施工、监理和建设单位的重视。     

闻遍天下

在这个版块中,已经存在了两个新闻类栏目:时政要闻、浮世绘漫画。前者严肃、正统、威仪;后者轻松、活泼、甚至有那么一点“八卦”。他们相得益彰,“软硬兼施”,带您快速扫描近来发生的大事小情。但“时政要闻”从上期起就已移至“主体领域”版块。为了更加满足您的需求,从本期开始,本版块又推出一个新栏目:“闻遍天下”,它的风格介于前两档栏目之间,中规中矩,既关注职业,也紧扣安康,突出“视”字,更贴近于这个版块的定位。希望让您看得更宽更广,国内国外、东南西北中,在短时间里获取有益的信息。4月28日是世界职业安全卫生日,针对此活动,我们对国际劳工组织北京局项目官员朱常有进行了访问,同时在“国际”版也有今年活动主题的简介和对去年全球职业安全卫生日的回顾。此外,已经连载两期的美国搜救机制也在本期上演完结篇。从读者的反馈来看,很多朋友喜欢看这样有借鉴性、实用性的文章。我们将尽量满足大家的要求,同时也向各位诚征国际稿件,内容可以是职业安全,也可以反映公共安全,以他国之石,攻我中国美玉。人间四月天,春色犹存,芳菲未尽。新栏目出炉,老栏目希望得到您一如既往的关注和支持。让我们共同经营好这片大家共有的园地。     

一种大型铝合金薄壁件高效加工工艺研究

通过对某型号卫星贮箱支架的数控加工实践,研究了大型铝合金框架式薄壁结构件的高效数控加工工艺技术。通过合理选择机械加工规程和工艺参数,解决了这类零件加工过程中极易超差等难题,可靠地满足了型号研制的要求。同时利用MastercamX软件研究了高效数控加工问题。     

Morphology of single inhalable particle inside public transit biodiesel fueled bus

In an urban-transit bus,fueled by biodiesel in Toledo,Ohio,single inhalable particle samples in October 2008 were collected and detected by scanning electron microscopy and energy dispersive X-ray spectrometry(SEM/EDS).Particle size analysis found bimodal distribution at 0.2 and 0.5 μm.The particle morphology was characterized by 14 different shape clusters:square,pentagon,hexagon,heptagon,octagon,nonagon,decagon,agglomerate,sphere,triangle,oblong,strip,line or stick,and unknown,by quantitative order.The square particles were common in the samples.Round and triangle particles are more,and pentagon,hexagon,heptagon,octagon,nonagon,decagon,strip,line or sticks are less.Agglomerate particles were found in abundance.The surface of most particles was coarse with a fractal edge that can provide a suitable chemical reaction bed in the polluted atmospheric environment.The three sorts of surface patterns of squares were smooth,semi-smooth,and coarse.The three sorts of square surface patterns represented the morphological characteristics of single inhalable particles in the air inside the bus in Toledo.The size and shape distribution results were compared to those obtained for a bus using ultra low sulfur diesel.     

Effect of functional groups on sludge for biosorption of reactive dyes

The sludge, which was collected from a biological coke wastewater treatment plant, was used as a low-cost adsorbent in the removal of reactive dyes (methylene blue (MB) and reactive red 4 (RR4)) from aqueous solution. The pH of dye solution played an important role on the dye uptake. As the solution pH increase, the MB uptake increased, while the RR4 uptake decreased. The maximum uptake of RR4 by protonated sludge was 73.7 mg/g at pH 1, and the maximum uptake of MB by sludge was 235.3 mg/g at pH 9. Three functional groups, including carboxyl, phosphonate, and amine group, were identified by potentiometric titration, fourier transform infrared (FT-IR) spectrometry, and X-ray photoelectron spectroscopy (XPS). The anionic functional groups, phosphonate and carboxyl group, were identified as the binding sites for the cationic MB. Amine groups were identified to bind RR4. The main mechanism of the reactive dyestuffs adsorption is electrostatic interaction.