烟台近海大型底栖动物群落特征

根据2010年和2011年对烟台近海大型底栖动物的周年调查资料,采用优势度指数、物种多样性指数及Cluster聚类和MDS排序方法,进行群落特征和群落演替情况的。研究。结果表明,该海域共采集大型底栖动物176种,其中优势类群为多毛类。群落中的优势种主要包括短叶索沙蚕和不倒翁虫。烟台近海年平均生物量和丰度分别为16.72g/m~2和1022ind/m~2,且存在季节性差异。丰富度指数(D)、均匀度指数(J)和多样性指数(H')的年平均值分别为2.30、0.70和1.91。烟台近海大型底栖动物群落与底质和水深关系密切。群落特征发生了一定程度的变化,软体动物比例减少,多毛类比例增加。人类活动包括污水排放、养殖和捕捞、港口建设和船舶航运等干扰是导致上述变化的主要原因

一种新型微孔聚合物电解质的制备与表征

以介孔分子筛SBA-15为填料,探索出一种无需使用增塑剂制备微孔型聚合物电解质的新方法.当SBA-15︰PVdF-HFP(偏氟乙烯-六氟丙烯共聚物)=3︰8时,所制备的复合固体聚合物电解质(CSPE)室温电导率达0.30mS·cm~(-1).红外透射光谱显示,成膜液中溶剂分子和SBA-15分子筛之间的相互作用所引发的相分离导致微孔的形成.X射线衍射(XRD)结果表明,SBA-15分子筛的加入,降低了聚合物电解质的结晶度,而SBA-15分子筛仍保持原有的骨架结构.所组装的Li/CSPE/MCF电池具有较为平稳的充放电平台,首次循环的库仑效率约为85.0%,经过20次循环后,容量保持率为94.0%

Effects of electro-acupuncture at stomach meridian acupoints on serum and urine metabolic profiles of gastric ulcer model rats

目的:采用核磁共振氢谱技术(1H NMR)研究电针胃经穴对胃溃疡模型大鼠血清和尿液代谢轮廓的影响。方法:40只SD大鼠随机分为空白组、模型组、胃经穴组和胆经穴组,每组10只。除空白组外,利用束缚冷应激法制备大鼠胃溃疡模型,造模成功后用电针分别刺激胃经组和胆经组相关穴位,收集大鼠的血清和尿液,获取一维1H NMR谱,并利用模式识别方法分析各组间的代谢轮廓差异。结果:与模型组比较,胃经穴组血清中的肌醇、甘氨酸、谷氨酰胺、异亮氨酸、缬氨酸和尿液中的肌酸酐、乳酸、醋酸盐、肌酸、琥珀酸盐、牛磺酸、甘氨酸、苯乙酰甘氨酸、尿囊素、胆碱、三甲胺、甲酸盐、甜菜碱代谢物的表达水平得到了明显地恢复(P<0.05),更接近空白组的代谢水平。结论:电针胃经穴可通过调节胃溃疡大鼠的氨基酸代谢和脂肪代谢促进胃黏膜损伤的修复。Objective: To explore the effects of electro-acupuncture at stomach meridian acupoints on serum and urine metabolic profiles of gastric ulcer model rats by application of 1H nuclear magnetic resonance(1H NMR) spectroscopy. Methods: Forty SD rats were randomly divided into the control group, model group, stomach meridian group and gallbladder meridian group, with 10 rats in each group. The gastric ulcer rat model was established by the restrained cold stress method. After modeling, the model rats were treated with electro-acupuncture at the stomach meridian and gallbladder meridian respectively, the serum and urine of rats were collected to obtain one dimensional 1H NMR spectrum, and the differences of metabolic profiles between these groups were analyzed by the pattern recognition method. Results: Compared to model group, the concentration of myo-inositol, glycine, glutamine, isoleucine, valine in serum from the stomach meridian group have obviously recovered and returning to normal level. The urinary metabolites such as Creatinine, lactic acid, acetic acid salt, acid, succinic acid salt, taurine, glycine, phenylacetyl glycine, allantoin, choline, trimethylamine, formate, betaine have also partly recovered after electro-acupuncture stimulation in the stomach meridian(P<0.05). Conclusion: Electro-acupuncture at stomach meridian acupoints could repair the gastric ulcer lesion by regulating the metabolism of lipid and amino acid in rats with gastric ulcer.国家自然科学基金项目(No.81473751,No.81260556);; 广东省自然科学基金项目(No.2014 A030313005);; 福建省自然科学基金项目(No.2015J05168);; 福建省卫生厅科研项目(No.wzpw201301)~

Influence of Electrolyte Composition on the Intercalation-Deintercalation Process of Lithium Ion in Spinel LiMn_2O_4

运用电化学阻抗谱(EIS)研究了尖晶石lIMn2O4正极在1MOl·l-1lIPf6-EC(碳酸乙烯酯)∶dEC(碳酸二乙酯)∶dMC(碳酸二甲酯),1MOl·l-1lIPf6-EC∶dEC∶EMC(碳酸甲乙酯)和1MOl·l-1lIPf6-EC∶dMC三种不同电解液中,-20-20℃范围内的阻抗谱特征随温度的变化.研究结果表明,温度强烈影响尖晶石lIMn2O4正极的阻抗谱特征,而电解液组成对尖晶石lIMn2O4正极阻抗谱特征的影响较小,但电解液组成对锂离子在尖晶石lIMn2O4正极中嵌入脱出过程相关动力学参数影响较大.测得尖晶石lIMn2O4正极在上述三种电解液中,锂离子迁移通过固体电解质相界面(SEI)膜的离子跳跃能垒平均值分别为7.60、16.40和18.40kJ·MOl-1;电子电导率的热激活化能平均值分别为44.77、35.47和68.06kJ·MOl-1;嵌入反应活化能平均值分别为52.19、46.19和69.86kJ·MOl-1.Variations in the impedance spectra of the commercially available spinel LiMn2O4 electrode from -20 to 20 ℃ were investigated by electrochemical impedance spectroscopy(EIS) in 1 mol·L-1 LiPF6-EC(ethylene carbonate):DEC(diethyl carbonate):DMC(dimethyl carbonate),1 mol·L-1 LiPF6-EC:DEC:EMC(ethyl methyl carbonate) and 1 mol·L -1 LiPF6-EC :DMC electrolyte solutions.We found that the impedance spectral characteristics of the spinel LiMn2O4 electrode was strongly influenced by temperature and only slightly influenced by the electrolyte composition.However,the electronic resistance and the resistance of the SEI film as well as the charge transfer reaction resistance of the spinel LiMn2O4 electrode were strongly influenced by the electrolyte composition.In 1 mol·L-1 LiPF6-EC:DEC:DMC,1 mol·L-1 LiPF6-EC:DEC:EMC and 1 mol·L-1 LiPF6-EC:DMC electrolyte solutions,the energy barriers for the ion jump relating to the migration of lithium ions through the solid electrolyte interphase(SEI) film of the spinel LiMn2O4 electrode were determined to be 7.60,16.40,and 18.40 kJ·mol-1.The thermal active energies of the electronic conductivities were 44.77,35.47,and 68.06 kJ·mol-1 and the intercalation-deintercalation reaction active energies were 52.19,46.19,and 69.86 kJ·mol-1,respectively.国家重点基础研究发展规划(973)(2009CB220102);中国矿业大学青年科技基金(ON080282);中国矿业大学科技攀登计划(ON090237)资助项目---

Preparation and characterization of a novel composite microporous polymer electrolyte for Li-ion batteries

A novel composite microporous polymer electrolyte composed of poly(vinylidene fluoride-co-hexafluoropropylene) (PVdF-HFP) and mesoporous SBA-15 was prepared. The composite solid polymer electrolyte (CSPE) exhibits ionic conductivity as high as 0.30 mS-(cm-1) with a composition of SBA-15 : PVdF-HFP=3 : 8 at room temperature. Infrared transmission spectroscopic results suggested that the mechanism of micropore formation is similar to that of the phase inversion. X-ray diffraction (XRD) results demonstrated that the addition of SBA-15 inhibits the crystallization of PVdF-HFP, while the SBA-15 preserves well its ordered mesoporous structure during the course of preparation. The Li/CSPE/MCF of half-cell was assembled, and it showed a good electrochemical and cyclability performance during charge-discharge cycles

Long-Term Trends of Macrobenthos in Southern Bohai Sea, China, in Relation toEnvironmental Changes

根据50多年来渤海南部海域大型底栖动物群落的历史资料,以及2011~2013年的现场调查数据,从渤海南部包括黄河口邻近海域及莱州湾大型底栖动物群落结构变化特征出发,分析了其长期演变的过程和规律,旨在阐明底栖动物群落的演变趋势,识别其重要的演变时段.并结合50年来渤海南部海域相关底栖环境因子的变化特征,探讨底栖动物群落的演变原因.过去50余年来,渤海南部海域大型底栖动物群落在物种数、生物量、丰度以及群落结构组成等方面都发生了较大的变动,具体表现为寿命长、体积大、具有高竞争力的K对策种的优势地位正逐渐丧失,而被寿命短、适应能力宽、具有高繁殖能力的R对策种所取代.按照50余年来渤海南部海域大型底栖动..

Ａｐｐｌｉｃａｔｉｏｎ ｏｆ Ｚｉｇｂｅｅ ｉｎ Ｉｒｒｉｇａｔｉｏｎ Ｆｏｒｅｃａｓｔ ｉｎ Ｉｒｒｉｇａｔｉｏｎ Ｄｉｓｔｒｉｃｔ

：针对大尺度灌区进行准确灌溉预报过程中存在的土壤水分空间变异性和预报实时性的问题，设计了通过对灌区合理划分基本单元及优化布置土墒采集节点，应用Ｚｉｇｂｅｅ无线传感网络分区域采集土壤墒情，由水量平衡方程对各单元实测数据进行预报，并逐层汇总、分析得到灌区总预报。通过ＧＰＲＳ无线网络实现远程ＰＣ机与区域Ｚｉｇｂｅｅ网络的数据连接，不仅实时监控灌区土壤墒情而且可执行远程灌溉控制，提高了灌区灌溉管理效率，对于灌区灌溉管理的数字化、实时性发展具有重要意义。Ａｂｓｔｒａｃｔ：Ｓｏｉｌ　ｗａｔｅｒ　ｖａｒｉａｂｉｌｉｔｙ　ａｎｄ　ｒｅａｌ－ｔｉｍｅ　ｆｏｒｅｃａｓｔ　ａｒｅ　ｔｈｅ　ｍａｊｏｒ　ｐｒｏｂｌｅｍｓ　ｉｎｖｏｌｖｅｄ　ｉｎ　ｐｒｅｃｉｓｅ　ｉｒｒｉｇａｔｉｏｎ　ｆｏｒｅｃａｓｔ　ｆｏｒ　ｂｉｇ　ｓｃａｌｅ　ｉｒｒｉｇａｔｉｏｎ　ｄｉｓｔｒｉｃｔ．Ｉｎ　ｔｈｉｓ　ｐａｐｅｒ，ｔｈｅ　ｒｅａｓｏｎａｂｌｅ　ｂａｓｉｃ　ｕｎｉｔ　ｄｉｖｉｓｉｏｎ　ｍｅｔｈｏｄ　ｉｓ　ｄｅｓｉｇｎｅｄ　ａｎｄ　ｔｈｅ　ｌａｙｏｕｔ　ｏｆ　ｗａｔｅｒ　ｓｏｉｌ　ｓｅｎｓｏｒ　ｓｉｔｅｓ　ｉｓ　ｏｐｔｉｍｉｚｅｄ．Ｔｈｅｎ　ｔｈｅ　Ｚｉｇｂｅｅ　ｗｉｒｅｌｅｓｓ　ｎｅｔ　ｔｅｃｈｎｏｌｏｇｙ　ｉｓ　ｕｓｅｄ　ｔｏ　ｃｏｌｌｅｃｔ　ｓｏｉｌ　ｗａｔｅｒ　ｃｏｎｔｅｎｔ　ｉｎ　ｅａｃｈ　ｕｎｉｔ　ａｎｄ　ｔｏ　ｆｏｒｅｃａｓｔ　ｔｈｅ　ｗａｔｅｒ　ｄｅｍａｎｄｗｉｔｈ　ｗａｔｅｒ　ｂａｌａｎｃｅ　ｅｑｕａｔｉｏｎ．Ａｌｌ　ｔｈｅ　ｆｏｒｅｃａｓｔ　ｄａｔａ　ｉｎ　ｂａｓｉｃ　ｌａｙｅｒ　ｏｒ　ｂａｓｉｃ　ｕｎｉｔｓ　ａｒｅ　ａｎａｌｙｚｅｄ　ｔｏ　ｐｒｅｄｉｃｔ　ｔｈａｔ　ｉｎ　ｔｈｅ　ｔｏｐ　ｌａｙｅｒ　ａｎｄ　ｆｉｎａｌｌｙｔｏ　ｏｂｔａｉｎ　ｔｈａｔ　ｏｆ　ｔｈｅ　ｇｌｏｂａｌ　ｉｒｒｉｇａｔｉｏｎ　ｄｉｓｔｒｉｃｔ．Ｔｈｅ　Ｚｉｇｂｅｅ　ｎｅｔ　ｄａｔａ　ｔｒａｎｓｍｉｔｔｉｎｇ　ｔｏ　ｒｅｍｏｔｅ　ＰＣ　ｔｈｒｏｕｇｈ　ＧＰＲＳ　ｃａｎ　ｎｏｔ　ｏｎｌｙ　ｍｏｎｉｔｏｒ　ｔｈｅｒｅａｌ－ｔｉｍｅ　ｓｏｉｌ　ｗａｔｅｒ　ｃｏｎｔｅｎｔ，ｂｕｔ　ａｌｓｏ　ｃｏｎｄｕｃｔ　ｔｈｅ　ｒｅｍｏｔｅ　ｉｒｒｉｇａｔｉｏｎ　ｃｏｎｔｒｏｌ．Ｔｈｉｓ　ｔｅｃｈｎｏｌｏｇｙ　ｉｓ　ｓｉｇｎｉｆｉｃａｎｔ　ｉｎ　ａｃｃｅｌｅｒａｔｉｎｇ　ｔｈｅ　ｄｉｇｉｔａｌｍａｎａｇｅｍｅｎｔ　ｏｆ　ｉｒｒｉｇａｔｉｏｎ　ａｎｄ　ｉｎｃｒｅａｓｉｎｇ　ｉｒｒｉｇａｔｉｏｎ　ｍａｎａｇｅｍｅｎｔ　ｅｆｆｉｃｉｅｎｃｙ

辽宁獐子岛马牙滩潮间带及近岸海区大型底栖动物群落特征

为摸清辽宁獐子岛潮间带及近岸海区的大型底栖动物的分布现状和群落受扰动情况,作者于2011年11月中旬在马牙滩潮间带和近岸海区采集大型底栖动物,采用优势度指数、Shannon-Wiener多样性指数、Margalef丰富度指数、Pielou均匀度指数,Bray-Curtis相似性聚类分析、MDS标序和ABC曲线等方法,分析该区域内大型底栖动物群落的生态学特点。结果表明,在潮间带共鉴定大型底栖动物39种,优势类群为多毛类、甲壳类和软体类;优势种均为多毛类,即小头虫(Capitella capitata)、多美沙蚕(Lycastopsis augenari)、仙居虫(Naineris laeviga..

Macrobenthic fauna in the intertidal and offshore areas of Zhangzi Island

为摸清辽宁獐子岛潮间带及近岸海区的大型底栖动物的分布现状和群落受扰动情况,作者于2011年11月中旬在马牙滩潮间带和近岸海区采集大型底栖动物,采用优势度指数、Shannon-Wiener多样性指数、Margalef丰富度指数、Pielou均匀度指数,Bray-Curtis相似性聚类分析、MDS标序和ABC曲线等方法,分析该区域内大型底栖动物群落的生态学特点。结果表明,在潮间带共鉴定大型底栖动物39种,优势类群为多毛类、甲壳类和软体类;优势种均为多毛类,即小头虫(Capitella capitata)、多美沙蚕(Lycastopsis augenari)、仙居虫(Naineris laeviga..