TJIS-Ⅲ型野外工业探伤安全控制系统设计与应用

为了有效控制野外工业探伤作业引发的辐射安全事故,我们采用红外线监控技术与PLC控制技术相结合的方法,研制了一套安全控制系统。系统测试结果表明,该系统能够有效防止由人员闯入造成的辐射安全事故。     

Polyaniline nanofibers: acute toxicity and teratogenic effect on Rhinella arenarum embryos

The fate and effect of nanomaterials in the environment is of paramount importance towards the technological application of the materials. This work shows the ecotoxicological potential of polyaniline (PANI) nanofibers in the larvae Rhinella arenarum by means of AMPHITOX test. Acute toxicity of PANI nanofibers towards embryos of the common South American toad R. arenarum (Anura: bufonidae) was evaluated in the premetamorphosis (stage 25) larvae. The exposure of R. arenarum larvae to at dose of 150, 250 and 400 mg L⁻¹ resulted in 100% viability within 96 h exposure. The embryos at 2-4 blastomers stage (early life stage teratogenic test) revealed that embryos were not killed and no teratogenic effects were observed when embryos were incubated with PANI nanofibers (150 and 250 mg L⁻¹), while only a growth retardation of embryos was induced at levels of 250 mg PANI nanofibers L⁻¹. On the other hand, at 400 mg L⁻¹ concentration, a reduction in the body length of larvae and tail malformation was observed. This results suggest that a concentration-dependent toxicity is operative, typified by phenotypes that had abnormal body axes. The presence of PANI nanofibers in gut contents and its excretion by larval stages of R. arenarum was confirmed by UV-visible spectroscopy.     

红外林火探测仪高速数字图像接口的设计

由于红外林火探测仪的视频输出采用高速的LVDS接口;不能直接与DSP处理器直接连接,这里介绍了一种在视频输出的LVDS接口与DSP处理器之间利用FPGA接口实现高速数字图信号的缓冲的方法。     

红外光度法测定水中矿物油的技术和应用

系统讨论了红外光度法测定水中矿物油的原理、技术特性及应用中的种种技术问题,着重探讨了多基团带权重累加法定量原理,并推导了三波长红外光谱法测油数学模型.     

生物吸附剂ZL5-2对Cr(Ⅵ)的吸附机理

为测定环境样品中氯菊酯农药残留,用活泼酯法将氯菊酯半抗原(Py)与卵白蛋白(OVA)偶联,制备合成抗原Py-OVA作包被原,建立间接竞争酶联免疫吸附测定法.方阵滴定确定了抗血清最佳稀释度(1∶2 500),包被抗原的最适工作浓度0.45μg/mL,并建立了标准工作曲线.工作曲线表明在10～800μg/L浓度范围内呈良好的线性关系,回收率>97%.     

Determination of soil content in chlordecone (organochlorine pesticide) using near infrared reflectance spectroscopy (NIRS)

Chlordecone is a toxic organochlorine insecticide that was used in banana plantations until 1993 in the French West Indies. This study aimed at assessing the potential of near infrared reflectance spectroscopy (NIRS) for determining chlordecone content in Andosols, Nitisols and Ferralsols from Martinique. Using partial least square regression, chlordecone content conventionally determined through gas chromatography–mass spectrometry could be correctly predicted by NIRS (Q² = 0.75, R² = 0.82 for the total set), especially for samples with chlordecone content <12 mg kg⁻¹ or when the sample set was rather homogeneous (Q² = 0.91, R² = 0.82 for the Andosols). Conventional measures and NIRS predictions were poorly correlated for chlordecone content >12 mg kg⁻¹, nevertheless ca. 80% samples were correctly predicted when the set was divided into three or four classes of chlordecone content. Thus NIRS could be considered a time- and cost-effective method for characterising soil contamination by chlordecone.     

根瘤菌菌体及胞外多糖红外光谱特征

记录并分析了根瘤菌４个新类群菌株的菌体与胞外多糖的红外光谱,表明它们在特定光谱区显示特征吸收峰．根瘤菌菌体光谱特征在鉴定上具有一定意义;胞外多糖的结构为β－配糖键连接,其光谱特征与数值分类结果关系不明显     

浓硫酸低温分解废弃稀土抛光粉工艺研究

采用浓硫酸低温分解回收废弃稀土抛光粉,考察了硫酸用量、分解温度和反应时间对分解效果的影响,结果显示,较佳实验条件下,稀土收率可达95%以上。通过热重-差热与红外光谱联用技术实时在线监测技术,表明分解过程分为2个阶段,分别在270℃和300℃温度范围附近,稀土氧化物和稀土氟氧化物与硫酸发生反应。     

海水中石油类国标分析方法存在的问题及改进建议

当前海水石油类分析三种国标方法存在代表性和适用性不足的问题,不同方法的数据间缺乏可比性,给政府和民众控制水体污染、评价水质状况带来偏差和不便。建议国家相关部门修订海水石油类分析方法,将水质石油类分析国标方法统一为红外分光光度法。通过海水样品加标实验验证了该方法的可行性,实际操作简便、准确。     

餐饮业废油脂皂化工艺的探索

研究了废油脂的皂化方法和皂化机理。通过红外光谱分析废油脂皂化样品 ,对皂化度的影响因素进行了讨论。摸索出最佳皂化工艺条件 :皂化时间 4h ,皂化温度 10 0℃ ,碱液用量 (NaOH与废油脂的质量比 ) 1∶2 ,皂化用NaOH碱液浓度为 30 %。