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

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

JUNO Sensitivity on Proton Decay p→νˉK+p\to \bar\nu K^+ Searches

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in $p\to \bar\nu K^+$ mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar\nu K^+$ is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is $9.6 \times 10^{33}$ years, competitive with the current best limits on the proton lifetime in this channel