Exposure to radiation from global system for mobile communications at 1,800 MHz significantly changes gene expression in rat hippocampus and cortex

We have earlier shown that radio frequency electromagnetic fields can cause significant leakage of albumin through the blood–brain barrier of exposed rats as compared to non-exposed rats, and also significant neuronal damage in rat brains several weeks after a 2 h exposure to a mobile phone, at 915 MHz with a global system for mobile communications (GSM) frequency modulation, at whole-body specific absorption rate values (SAR) of 200, 20, 2, and 0.2 mW/kg. We have now studied whether 6 h of exposure to the radiation from a GSM mobile test phone at 1,800 MHz (at a whole-body SAR-value of 13 mW/kg, corresponding to a brain SAR-value of 30 mW/kg) has an effect upon the gene expression pattern in rat brain cortex and hippocampus—areas where we have observed albumin leakage from capillaries into neurons and neuronal damage. Microarray analysis of 31,099 rat genes, including splicing variants, was performed in cortex and hippocampus of 8 Fischer 344 rats, 4 animals exposed to global system for mobile communications electromagnetic fields for 6 h in an anechoic chamber, one rat at a time, and 4 controls kept as long in the same anechoic chamber without exposure, also in this case one rat at a time. Gene ontology analysis (using the gene ontology categories biological processes, molecular functions, and cell components) of the differentially expressed genes of the exposed animals versus the control group revealed the following highly significant altered gene categories in both cortex and hippocampus: extracellular region, signal transducer activity, intrinsic to membrane, and integral to membrane. The fact that most of these categories are connected with membrane functions may have a relation to our earlier observation of albumin transport through brain capillaries.     

Investigation to meet China II emission legislation for marine diesel engine with diesel methanol compound combustion technology

In order to reduce the pollutant emission and alleviate the pressure of petroleum resources shortage and greenhouse gas emission at the same time, the use of clean and renewable alternative fuel for marine engines is a promising option. In this study, a marine diesel engine, which was modified to run in diesel methanol compound combustion (DMCC) mode, was investigated. After the diesel injection parameters were calibrated, and combined with a sample after-treatment device DOC (diesel oxidation catalyst), the engine could meet the requirements of China II legislation. The overall MSP (methanol substitute percent) reached 54.1%. The value of each pollutant emission was much lower than that in China II emission legislation, and there was almost no methanol and formaldehyde emissions. When methanol was injected into the inlet manifold, the intake air temperature decreased a lot, as well as the exhaust gas temperature, which were beneficial to increase engine thermal efficiency and improve engine room environment. Compared with the engine running in pure diesel mode, when the engine ran in diesel/methanol dual fuel mode, the combustion phase was advanced, and the combustion duration became shorter. Therefore, the engine thermal efficiency increased, and fuel consumption decreased significantly.     

邻苯二甲酸二丁酯降解过程的单体同位素分析

研究对比了邻苯二甲酸二丁酯（DBP）在不同降解过程（水解、UV/H₂O₂光解、直接光解、过硫酸钾光氧化）中的碳、氢同位素组成变化、分馏特征及二维同位素（Δδ²H-Δδ¹³C）的相关性.水解反应中DBP分子产生了显著的碳同位素分馏,未发现氢同位素分馏,而且碳同位素富集因子ε_C为（-2.7±0.4）‰,表明DBP水解时发生C-O键断裂,氢原子不参与反应.而UV/H₂O₂光解和直接光解反应（pH值分别为2、7和10）中,DBP分子呈现了相似的二维同位素相关性Λ值[（9±2）~（11±2）],推测经历了相同的反应过程.过硫酸钾光氧化降解时,明显偏大的Λ值（31±3）说明反应可能发生C-H键断裂.结果表明：二维单体同位素分析（2D-CSIA）技术可以有效区分DBP的水解、光解、光氧化3种不同类型的降解过程,有助于分析其降解路径.     

A study on the interactions among several plant secondary compounds and aphids

The research, focused on the specific interactions among seven plant secondary compounds and aphids, was carried out and the preliminary results showed: (1) "T-typed tube method" was regarded as the best method compared with others designed to observe the interactions. (2) Cabbage aphid was able to be attracted by laurolene while it was not susceptible to α-pinene, β-pinene and diamylene. (3) Gossypol, a major secondary substance in cotton, was able to be implicated as feeding attractant to cotton aphid. (4) Rutin might be implicated repellent to cotton aphid.     

悬浮态TiO_2光催化降解苯系物的方法研究

以高压汞灯为光源 ,在TiO2 粉末悬浮体系内 ,系统地研究了光照时间、光照距离、催化剂用量、苯系物浓度和溶液pH、空气流量、H2 O2 浓度、Fe3+ 浓度等因素对模拟水样中苯系物的光催化降解效率的影响。研究结果表明 ,当光照时间为 2 0min、光照距离为 6cm ,TiO2 用量为 4 0 0mg L、pH =7、苯系物浓度为 10 0mg L ,空气流量为 4 0 0mL min,苯系物降解率可达 93% ,添加H2 O2 与Fe3+ 能增加苯系物的降解率 ,当H2 O2 浓度为 6mmol L ,Fe3+ 浓度为 0 2mmol L ,苯系物可完全降解。实验测定精密度RSD为 0 5 %。     

商丘至开封高速公路声屏障效果分析

随着高速公路的快速发展和车流量的日益增加，环境噪声给沿线居民带来一定影响。为了解商丘至开封堂速公路沿线声屏障的效果选取一所村办小学和一座村庄，监测了声屏障设施的效果，得出了该段起到噪声保护敏感点和降噪作用的结论，随后提出设置声屏障的若干建议。     

沪杭高速公路嘉善段道路声屏障的设计及降噪效果

在详细调查沪杭高速公路喜善张家浜中桥路段（试验路段）未建道路声屏障噪声情况的基础上，介绍了试验路段工程概况及道路声屏障的设计，并分析了声屏障的现场降噪效果，试验路段声屏障的声学指标达到预期目标，具有良好的环境效益。     

酚类化合物在矿化垃圾中的吸附性能与结构相关性研究

采用静态吸附方法,对8种酚类化合物在矿化垃圾中的吸附行为进行了研究,并用Langmuir和Fieundlish等温吸附方程对其进行了拟合.研究结果表明,8种代酚的吸附能力大小顺序为3-甲基酚＞4-甲氧基酚＞4-氯酚＞2,4-二氯酚＞3-硝基酚＞4-硝基酚＞2-氯酚＞苯酚.对8种酚类化合物Langmuir和Frendlich等温吸附方程常数和18个量子化学参数采用PLS进行逐步回归分析,得到了以Frendlich方程参数lnκ为因变量的数学模型.该模型表明,有机酚在矿化垃圾中的吸附性能主要与有机酚分子的疏水性和极性有关.而且该模型得到的预测值与实测值接近,说明利用PLS进行回归处理得到的模型较为合理、能有效地预测有机酚类化合物在矿化垃圾中的吸附行为.     

秦沈客运专线路基声屏障工程设计与施工

秦沈客运专线首次在通过村庄附近地段的路基上设计安装声屏障工程 ,作为降低列车通过时的噪音、减弱扰民程度的重要措施。文中介绍了声屏障工程的设计与施工、管理等情况。     

矿区复合生态系统中土壤演替和植被演替的相互影响

在讨论矿区复合生态系统涵义的基础上，以平朔安太堡露天煤矿为例，探讨了大型露天矿区复合生态系统演替与原生态系统演替的不同，即露天矿区复合生态系统演替极大地受着社会--经济--自然三方面的控制，在演替过程中土壤演替与植被演替相互影响、相互协调，共同作用了矿区复合生态系统。同时，还阐述了进行矿区生态重建的两大关键措施：生态环境建设和群落建设。