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| 1 | 16S rRNA is a better choice than COI for DNA barcoding hydrozoans in the coastal waters of China显示文摘Identification of hydrozoan species is challenging, even for taxonomic experts, due to the scarcity of distinct morphological characters and phenotypic plasticity. DNA barcoding provides an efficient method for species identification, however, the choice between mitochondrial cytochrome c oxidase subunit I(COI) and large subunit ribosomal RNA gene(16S) as a standard barcode for hydrozoans is subject to debate. Herein, we directly compared the barcode potential of COI and 16S in hydrozoans using 339 sequences from 47 pelagic hydrozoan species. Analysis of Kimura 2-parameter genetic distances(K2P) documented the mean intraspecific/interspecific variation for COI and 16S to be 0.004/0.204 and 0.003/0.223, respectively. An obvious 'barcoding gap' was detected for all species in both markers and all individuals of a species clustered together in both the COI and 16S trees. These results suggested that the species within the studied taxa can be efficiently and accurately identified by COI and 16S. Furthermore, our results confirmed that 16S was a better phylogenetic marker for hydrozoans at the genus level, and in some cases at the family level. Considering the resolution and effectiveness for barcoding and phylogenetic analyses of Hydrozoa, we strongly recommend 16S as the standard barcode for hydrozoans. | ZHENG Lianming HE Jinru LIN Yuanshao CAO Wenqing ZHANG Wenjing | 2014 | Acta Oceanologica Sinica2014，33，4： | 7 |
| 2 | Study onplugging performance of cross-linked polymer micro-spheres with reservoir pores显示文摘 | HUA Zhao LIN Meiqin GUO Jinru | 2013 | Journal of PetroleumScience and Engineering2013，105，： | 1 |
| 3 | Study on plugging performance of cross-linked polymer micro- spheres with reservoir pores 显示文摘 | Hua Zhao Lin Meiqin Guo Jinru | 2013 | Journal of Petroleum Science and Engineering2013，105，： | 1 |
| 4 | Study on the Matching Between Cross-Linked Polymer Microspheres and Nuclear-Pore Membranes显示文摘 | Lin Meiqin Guo Jinru Xu Fengqiang | | 0，，3： | 1 |
| 5 | Study on plugging performance of cross-linked polymer microspheres with reservoir pores显示文摘 | Zhao Hua Lin Meiqin Guo Jinru | 2013 | Journal of Petroleum Science and Engineering2013，105，3： | 1 |
| 6 | Study on plugging performance of cross-linked polymer microspberes with reservoir pores显示文摘 | Zhao Hua Meiqin Lin Jinru Guo | 2013 | Journal of petroleum science and engineering2013，105，： | 1 |
| 7 | 富氯造岩矿物中溴的分子结构显示文摘卤族元素诸如氯和溴作为地球化学示踪剂,常用于指示岩浆、变质岩和热液的来源和演化过程。而认清溴在造岩矿物中的形态和结构有助于丰富和完善其在地质环境演变中的示踪作用。但是,溴在造岩矿物中的含量极低导致大多数结构分析方法都无法使用,因此造岩矿物中微量溴的结构研究极具挑战性。本文采用81Br魔角旋转核磁共振(MAS NMR)光谱和同步辐射吸收光谱(XAS)技术,首次对富氯造岩矿物中的微量溴进行了结构分析。结果表明溴离子在方硼石中的微区结构不同于该矿物中三配位Cl原子的结构环境,而与Mg3B7O13Br中八面体配位的溴离子相似,表明即使在微量条件下也存在域偏析。而对其他富氯造岩矿物的Br K边X光吸收近边结构(XANES)光谱白线峰的位置和扩展X射线吸收精细结构(EXAFS)分析表明微量溴离子替代了这些矿物中氯的位置,导致局部结构扭曲膨胀。溴离子在造岩矿物中的这一微观结构研究结果可为探索氯和溴在地质演变过程的指示作用提供新的科学依据。 | Yuanming Pan Ning Chen Jianfeng Zhu Neelege Hopps Eli Wiens Jinru Lin | 2020 | 地学前缘2020，27，5： | 0 |
| 8 | 砷在石膏中固定机制:掺杂态和表面吸附沉淀态以及其在砷污染控制中的作用显示文摘石膏是矿山开采及冶炼等工业过程产生的大宗固体废弃物。工业活动产生的废液普遍有高含量的砷等有毒元素,这导致所产生的石膏也含有较高浓度的砷等有毒元素。研究砷在石膏中地球化学行为和归趋对含砷石膏的砷污染控制具有重要的理论和实际意义。然而目前对含砷石膏中不同形态的砷的定量测定和分析尚存在问题。本文在不同pH值的条件下共沉淀砷和石膏,利用电感耦合等离子体质谱(ICP-MS)、同步辐射X-射线吸收近边光谱(XANES)和电子顺磁共振(EPR)对石膏中掺杂态和表面吸附沉淀态的砷进行定量分析。ICP-MS的结果表明随着pH从2升高到12和14,石膏中砷的含量由57×10^-6增加到67470×10^-6和63980×10^-6。同步辐射X-射线吸收近边光谱和电子顺磁共振光谱分析表明石膏样品中主要含有五价砷。在2≤pH≤7.5时,固体样品中同步辐射吸收边后的峰形状和掺杂态砷的形状类似,而在pH≥8时,其边后峰的形状发生明显的变化;粉末电子顺磁共振(EPR)定量分析表明在2≤pH≤7.5时砷在石膏中的含量和ICP-MS的分析结果一致,而在pH≥8时其含量明显小于ICP-MS的分析结果。这些结果揭示了在2≤pH≤7.5时,砷在石膏中主要以掺杂态的形式存在,而在pH≥8时大部分砷是以吸附态或表面沉淀的形式存在。五价砷在石膏中的含量和固定机制随着pH值的变化而变化,其研究对了解尾矿中石膏对砷污染的控制作用具有重要作用。此外,研究石膏中由辐射导致的g约为2.33的[AsO3]^2-自由基电子顺磁共振特征峰,有助于补充和完善石膏的电子顺磁共振特征谱在地质测年及辐射剂量学中的应用。 | Jinru Lin Ning Chen Yuanming Pan | 2020 | 地学前缘2020，27，5： | 0 |
| 9 | Enhanced removal of high-As(Ⅲ)from Cl(-Ⅰ)-diluted SO_(4)(-Ⅱ)-rich wastewater at pH 2.3 via mixed tooeleite and(Cl(-Ⅰ)-free)ferric arsenite hydroxychloride formation显示文摘An advanced cost-saving method of removal of high-As(Ⅲ)from SO_(4)(-Ⅱ)-rich metallurgical wastewater has been developed by diluting the SO_(4)(-Ⅱ)content with As(Ⅲ)-Cl(-Ⅰ)-rich metallurgical wastewater and then by the direct precipitation of As(Ⅲ)with Fe(Ⅲ)at pH 2.3.As(Ⅲ)removal at various SO_(4)(-Ⅱ)/Cl(-Ⅰ)molar ratios and temperatures was investigated.The results showed that 65.2–98.2%of As(Ⅲ)immobilization into solids occurred at the SO_(4)(-Ⅱ)/Cl(-I)molar ratios of 1:1–32 and 15–60℃in 3 days,which were far higher than those in aqueous sole SO4(-Ⅱ)or Cl(-Ⅰ)media at the equimolar SO_(4)(-Ⅱ)or Cl(-Ⅰ)and the same temperature.SO_(4)(-Ⅱ)/Cl(-Ⅰ)molar ratio of 1:4 and 25℃were optimal conditions to reach the As removal maximum.Mixed aqueous SO4(-Ⅱ)and Cl(-Ⅰ)played a synergetic role in the main tooeleite formation together with(Cl(-Ⅰ)-free)ferric arsenite hydroxychloride(FAHC)involving the substitution of AsO_(3)^(3−)for Cl(-Ⅰ)for enhanced As fixation.The competitive complexation among FeH_(2)AsO_(3)^(2+),FeSO_(4)^(+)and FeCl^(2+)complexes was the main mechanism for the maximum As(Ⅲ)precipitation at the SO4(-Ⅱ)/Cl(-I)molar ratio of 1:4.Low As(Ⅲ)immobilization at high temperature with increased Fe(Ⅲ)hydrolysis was due to the formation of As(Ⅲ)-bearing ferrihydrite with the relatively high Fe/As molar ratio at acidic pH. | Zidan Yuan Guoqing Zhang Xing Wu Xu Ma Jinru Lin Shaofeng Wang Yongfeng Jia | 2023 | Journal of Environmental Sciences2023，，2： | 0 |
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