Inhibitory Effect of Salt Marsh Halophyte Salicornia Europaea on Prorocentrum Donghaiense

利用植物抑制藻类生长是目前海洋赤潮治理的有效生态手段之一。以东海原甲藻为材料,研究了滩涂盐生植物盐角草对东海原甲藻生长的抑制效应。结果显示:盐角草过滤培养液和4种根的有机相提取物(甲醇相、正丁醇相、氯仿相和石油醚相)能显著抑制东海原甲藻的生长,改变细胞大小。其中,石油醚相和正丁醇相提取物还能影响藻细胞CHl A含量。有机相提取物中以甲醇相提取物的抑制效果最强,对盐角草甲醇相提取物进行gC-MS分析,得到27种化合物,含量最高的3个组分为5-羟甲基-2-呋喃甲醛、棕榈酸和4-乙烯基-2-甲氧基-苯酚。研究表明:滩涂盐生植物盐角草能够抑制东海原甲藻的生长,具备开发新型赤潮生物抑藻剂的潜力,有望应用于海洋赤潮的防治。Phytoremediation, as one of the mechanisms for controlling marine algal blooms, is becoming an ecologically sustainable approach in recent years.In this work, we investigated the inhibitory effect of salt marsh halophyte Salicornia europaea on Prorocentrum donghaiense.Growth of P.donghaiense was not inhibited by the water extracts of S.europaea root, but the culture filtrate of S.europaea and four organic extracts.The inhibitory of organic extracts was dosedependent, and P.donghaiense was most sensitive to the methanol extract.GC-MS analysis of the methanol extract revealed 27 lipophilic compounds, in which 2-furancarboxaldehyde, 5-(hydroxymethyl)-, n-hexadecanoic acid and 2-methoxy-4-vinylphenol were the most abundant components.Together, our results suggested that salt marsh halophyte S.europaea might be applied as a new type material to control the growth of P.donghaiense.国家“863”计划项目(2007AA091704); 浙江省重点科技创新团队项目(2010R50039); 杭州市科技计划项目(20120433B19&20130533B11

1.3μm InGaAsP—InP双异质结边发光管

本文报道一种短条结构的高速大功率1.3μmInGaAsP—InP双异质结边发光管。在100mA的驱动电流下,耦合进入芯径50μm,数值孔径0.2的梯度折射率光纤的光功率大于60μW,上升时间、下降时间均约2ns,光谱半宽600～800A

正相模式/反相模式的二维液相色谱系统的构建与应用

以50mm×4.6mm的Hypersil SiO2正相色谱柱为第一维色谱系统,250mm×4.6mm的Kromasil C18反相色谱柱为第二维色谱系统,通过升高第二维色谱温度增加两维色谱流动相间互溶性的方法构建了定量环-阀切换接口的二维液相色谱系统（NPLC×RPLC）。根据有机溶剂的特征,在第一维正相色谱流动相中加入二氧六环,第二维反相色谱流动相中加入异丙醇,由此改善流动相兼容性的同时,有效地调整了分离选择性。采用此系统对中成药正天丸样品进行分离分析,峰容量达到1220的色谱系统

正相模式/反相模式的二维液相色谱系统的构建与应用

以50mm×4.6mm的Hypersil SiO2正相色谱柱为第一维色谱系统,250mm×4.6mm的Kromasil C18反相色谱柱为第二维色谱系统,通过升高第二维色谱温度增加两维色谱流动相间互溶性的方法构建了定量环-阀切换接口的二维液相色谱系统（NPLC×RPLC）。根据有机溶剂的特征,在第一维正相色谱流动相中加入二氧六环,第二维反相色谱流动相中加入异丙醇,由此改善流动相兼容性的同时,有效地调整了分离选择性。采用此系统对中成药正天丸样品进行分离分析,峰容量达到1220的色谱系统

滩涂盐生植物盐角草对东海原甲藻生长的抑制效应

利用植物抑制藻类生长是目前海洋赤潮治理的有效生态手段之一。以东海原甲藻为材料,研究了滩涂盐生植物盐角草对东海原甲藻生长的抑制效应。结果显示:盐角草过滤培养液和4种根的有机相提取物(甲醇相、正丁醇相、氯仿相和石油醚相)能显著抑制东海原甲藻的生长,改变细胞大小。其中,石油醚相和正丁醇相提取物还能影响藻细胞Chl a含量。有机相提取物中以甲醇相提取物的抑制效果最强,对盐角草甲醇相提取物进行GC-MS分析,得到27种化合物,含量最高的3个组分为5-羟甲基-2-呋喃甲醛、棕榈酸和4-乙烯基-2-甲氧基-苯酚。研究表明:滩涂盐生植物盐角草能够抑制东海原甲藻的生长,具备开发新型赤潮生物抑藻剂的潜力,有望应用于海洋赤潮的防治

A metal-semiconductor-metal detector based on ZnO nanowires grown on a graphene layer

National Natural Science Foundation of China [61176049, 61307047]; Program for New Century Excellent Talents in Fujian Province University (NCETFJ); China Scholarship Council (CSC)High quality ZnO nanowires (NWs) were grown on a graphene layer by a hydrothermal method. The ZnO NWs revealed higher uniform surface morphology and better structural properties than ZnO NWs grown on SiO2/Si substrate. A low dark current metal-semiconductor-metal photodetector based on ZnO NWs with Au Schottky contact has also been fabricated. The photodetector displays a low dark current of 1.53 nA at 1 V bias and a large UV-to-visible rejection ratio (up to four orders), which are significantly improved compared to conventional ZnO NW photodetectors. The improvement in UV detection performance is attributed to the existence of a surface plasmon at the interface of the ZnO and the graphene

GaN light-emitting diodes with an Al-coated graphene layer as a transparent electrode

We fabricated GaN light-emitting diodes with a layer of graphene as a transparent electrode. A 3-nm-thick Al layer was deposited on the graphene layer by electron-beam evaporation. This Al layer plays an important role in protecting the graphene layer during the device fabrication process. Moreover, this Al layer can also enhance the light emission of GaN light-emitting diodes through the investigation of electroluminescence spectra. The significantly improved light emission is attributed to the current expansion, the enhanced plasmonic density of states, and the decreased nonradiative recombination rate. ? 2014 The Japan Society of Applied Physics