贵金属氧化物电极电解处理有机废水

对经热分解法制备所得Ti基IrOr-Ta2O5涂层电极及掺杂Sn，Pb的三元氧化物电极电解处理染料厂废水及模拟有机废水进行了研究．COD测试结果表明，使用IrO2-Ta2O5／Ti电极可以电解去除废水中的有机物．随电解时间增加废水COD值降低，高COD值时电解效率高，COD值很低的有机废水中加入NaCl对电解去除有机物有很好的促进效果．电极掺杂第三元素Sn，Pb可以促进电解去除废水中的有机物，与IrO2-Ta2O5/Ti相比，PbO2/IrO2-Ta2O5／Ti电极电解废水的COD去除率提高了11．2%。     

4种杂交杨荧光光响应曲线

比较研究伊犁地区杂交杨4个不同品系(P.deltaids cv-64(P64)、P.balsamifera L.(Da)、P.euramericana(I-262)和P.euramerieanacv(I-467))的荧光参数与光量子通量密度(DPF)的响应变化特征.4种杂交杨的光照下最大可变荧光(F′m)大小直接影响光合反应中心最大的开放程度和实际的开放程度(ΦPSⅡ)的大小;光照下最小荧光(F′o)更多地参与4种杂交杨的ΦPSⅡ能量捕获效率.光合速率(Pn)作为植物生物行为对于植物叶绿素光捕获的光化学行为存在滞后效应,而真正决定植物转化光能的总量由植物叶片叶绿素捕获光量子量决定.vETR反映植物驱动PSⅡ的实际量子流量,vETR达到最大值时,光化学反应转化的光能量PE也同样达到最大值,是植物最大限度转化利用太阳能的点.建议用vETR和DPF的荧光光响应曲线作为计算和估算植物对光能的利用及叶片光能转化为净能量的能力,是比表观量子效率更为理想的指标.     

中国自然灾害生态风险评价

进行中国（陆地）生态风险评价研究,旨在探讨大尺度的区域生态风险评价方法并实施评价,为生态系统的风险识别和风险防范提供科技支持。选择10种自然灾害作为生态风险源,22种生态系统作为风险受体,并考虑生态-环境脆弱性的影响。在各单项灾害生态风险评价的基础上,完成了中国灾害生态风险综合评价与制图。评价结果显示,从诸种自然灾害风...     

两类地震风险评估模型的对比与讨论

回顾了传统的地震危险性评估的方法,介绍了基于离散事件仿真的地震风险评估方法,并以云南省永胜县为例,运用2类不同的方法对永胜县面临的地震风险进行了计算,得到了永胜县的地震烈度超越概率曲线.结果显示2类不同评估方法的结果有着很高的吻合度;结合保险行业地震风险管理的实际需求进一步讨论了基于离散事件的地震模型的优点及其合理性.     

Preparation and Magnetic Property of La_(0.7)Sr_(0.3)MnO_3 Nanorod by Combination Sol-Gel with Molten Salt

La0.7Sr0.3MnO3(LSMO) nanorods were synthesized by a method combining sol-gel with molten salts at 950 °C for 10 h, which employed KCl+NaCl(mass ratio 4:1) as eutectic molten salts. The morphologies and magnetic properties of the resulting LSMO nanorods were investigated by X-ray diffraction(XRD), scanning electron microscopy(SEM), transmission electron microscopy(TEM), and vibrating sample magnetometer(VSM) measurements. It was found that the obtained perovskite manganite LSMO was a uniform nanorod with a d...     

Bioaccumulation and single and joint toxicities of penta-BDE and cadmium to earthworms (Eisenia fetida) exposed to spiked soils

Bioaccumulation of penta-BDE(DE-71) in earthworms(Eisenia fetida) and the induced toxicities on the growth and reproduction of earthworms were investigated.All the major congeners in DE-71 could be bioaccumulated in earthworms and the concentration found in earthworms correlated to the spiked concentration in soil.DE-71 might inhibit the growth and reproduction of cocoons and juveniles of earthworms.The toxicities were dose dependent and increased with exposure time.Exposing earthworms to combination of DE-...     

Feasibility Study of Aluminum Hydroxide Sol as Adjuvant to Prepare Stable Vaccine Using Newcastle Disease Virus as a Model

Aluminum hydroxide sol (consisting of aluminum hydroxide nano-particles) prepared by a hydrothermal method was used as nano-aluminum adjuvant adsorbed the inactived Newcastle disease virus (NDV). The zeta potential of aluminum hydroxide colloidal particles,the inactivated NDV and the nano-aluminum adjuvant NDV are +48.16 mV,?13.8 mV and +39.97 mV,respec-tively. The nano-aluminum adjuvant vaccine was transparent and stable without precipitate,whereas the conventional aluminum ad-juvant vaccine was turbid and a white precipitate was visible soon. The hemagglutination inhibition (HI) titers of the nano-aluminum adjuvant group were generally higher than those of the conventional aluminum group except the titer on day 29. The results show that the nano-aluminum adjuvant has better stability and higher levels of antibodies for a longer time than the conventional aluminum adjuvant.     

An experimental study of dehydration melting of phengite-bearing eclogite at 1.5―3.0 GPa

Dehydration melting experiments were performed on ultrahigh-pressure eclogite from Bixiling in the Dabie orogen at 1.5―3.0 GPa and 800―950℃ using piston cylinder apparatus. The results show that (1) eclogite with ~5% phengite started to melt at T≤800―850℃ and P = 1.5―2.0 GPa and produced about 3% granitic melt; (2) the products of dehydration melting of phengite-bearing eclogite vary with temperature and pressure. Fluid released from dehydration of phengite and zoisite leads to partial melting of eclogite a...     

双层辉光离子渗Ni-Cr-Mo-Cu合金的工艺

在20钢基材上,利用双层辉光离子渗金属技术进行Ni-Cr-Mo-Cu多元共渗正交实验工艺研究.结果表明,工艺参数对渗层的元素总含量以及渗层的厚度有较大的影响,并确定了最佳工艺参数为源极电压1 050 V,工件电压250 V,气压35 Pa, 极间距15 mm.     

The Synthesis of 2, 4, 6-Triisopropyl-1, 3, 5-trioxane Catalyzed by Ionic Liquids

The synthesis of 2, 4, 6-triisopropyl- 1, 3, 5-trioxane with high yield and desirable selectivity from solvent-free cyclotrimerization of isobutyraldehyde catalyzed by ionic liquids was reported in this work.