Theoretical Studies of Sidewall Functionalization of Single Wall Carbon Nanotubes

摘要由于其独特几何结构、物理、化学性质及电子性质，碳纳米管吸引了大量的研究。然而，碳纳米管极低的溶解性大大阻碍了碳纳米管的分离、表征、应用等。新近研究表明碳纳米管管壁的共价化学修饰可望成为解决碳纳米管低溶解度问题的一条重要途径。本文通过量子化学计算考察了单壁碳纳米管管壁(SingleWallCarbonNanotube,简称SWNT)上的一系列化学反应，研究结果如下：1)经典的共轭双烯即1,3-丁二烯不太可能与SWNT管壁发生Diels-Alder反应。而由于芳香稳定化作用的存在，醌并二烯可以与SWNT管壁发生DA加成反应。2)甲亚胺叶立德、臭氧在碳纳米管管壁的1,3-DC反应容易发生而生成管...Abstract Carbon nanotube (CNT) has recently attracted much attention for its unique structure, special electronic and mechanic properties. The notorious insolubility of CNTs impedes the separations, characterizations, and applications of CNTs. One promising way to circumvent such a bottleneck is the chemical functionalization of CNTs. In this work, a systematic theoretical investigation has ...学位：理学硕士院系专业：化学化工学院化学系_物理化学(含化学物理)学号：20012503

Isolation and Classification of Marine Oil Degrading Bacteria and Their Application in Bioremediation of Marine Oil Pollution

由于全球性广泛的石油生产、运输、使用和处置，在许多环境特别是海洋环境中，石油污染已经成为一个普遍而严重的问题。目前，我国沿海地区海水含油量已超过国家规定的海水水质标准2～8倍。本文以原油或柴油为唯一碳源从厦门近海表层海水样品中通过富集筛选得到了2组降解菌群。从柴油富集物中分离得到了2株细菌，经16SrDNA鉴定分别属于假单胞菌属（Pseudomonaspseudoalcaligenes，97%）和食烷菌属(Alcanivoraxdieselolei，99%)。从原油富集物中分离得到了7株细菌，经16SrDNA鉴定，分别属于不动杆菌属(Acinetobacterradioresistens，99...Petroleum pollution has been a serious problem in environments, especially in the marine environments due to oil production and transportation disposal. In the coastal areas of China, the oil concentration in seawater is 2-8 times that of normal seawater. By enrichment with crude oil or diesel as the sole carbon source, two oil-degrading consortia were obtained; one is a diesel degrading consor...学位：理学硕士院系专业：生命科学学院生物学系_生物化学与分子生物学学号：20032611

Relating the ecological characters of the zooplankton in the coastal waters of central Fujian Province and the middle area of Subei Shoal to the seasonal variation of water masses

本研究根据2009年12月，2010年4月、8月在福建中部近海24°55'-25°13'N、119°11'-119°32'E水域三个航次的浮游动物调查资料，分析了该海域浮游动物的种类组成、生态类群组成、优势种、多样性指数和数量分布，讨论了这些生态特征的季节变化及其与台湾海峡内的水团变化的关系。同时还分析了2009年5月和8月在苏北浅滩33°04'-33°12'N、121°02'-121°12'E水域两个航次的浮游动物调查资料，并通过比较两处调查水域的浮游动物生态特征探讨了水团对浮游动物的影响。这对于明确调查水域浮游动物的资源状况，以及了解大尺度气候与水文因素对浮游动物的影响有一定的科学意义。主...During three oceanographic surveys conducted in the coastal waters of central Fujian Province (24°55'-25°13'N、119°11'-119°32'E) during December 2009, April and August 2010, and two oceanographic surveys conducted in the middle area of Subei Shoal (33°04'-33°12'N、121°02'-121°12'E) during May & Aug.2009, the species composition, eco-groups, dominant species, diversity index and horizontal distributi...学位：理学硕士院系专业：海洋与环境学院海洋学系_海洋生物学学号：2242009115115

产业政策与企业跨行业并购:市场导向还是政策套利

本文利用2006—2016年中国上市公司发起的并购数据和人工搜集整理的同一时期国家产业政策支持信息,在考虑并购双方所受国家产业政策支持情况的基础上,实证研究了国家产业政策支持对企业跨行业并购行为的影响问题。研究发现,国家产业政策实质上是一种政府通过对各行业进行不同程度的政策支持,引导社会资源向受支持行业流动以实现政府主导产业结构转型升级的政策工具。实证结果显示,主并企业更可能对受到产业政策支持的目标企业发起跨行业并购;在此基础上,如果主并企业自身没有受到产业政策支持,上述结论会得到进一步强化;考虑企业所有权性质后发现,国有企业更可能发起与产业政策导向一致的跨行业并购;但是,如果主并企业本身受到产业政策支持,那么国有企业也将比非国有企业更少进行跨行业并购。进一步的分析发现,部分企业跨行业并购后主营收入占比不降反增,其并购后并未将资源转移至新行业,可能仅是一种套取政府补贴的"政策套利"行为;而相对于非国有企业,国有企业出于"政策套利"动机进行跨行业并购的可能性更低。本文丰富了政府宏观政策对企业微观决策的影响研究,并对充实企业并购行为的研究做出了一定贡献。国家社会科学基金重大项目“新常态下金融部门与实体经济良性互动的现代经济治理体系问题研究”(批准号15ZDA028);;国家自然科学基金面上项目“资本市场中的社会关系与政治地理中的资本市场:来自中国的理论与实证”(批准号71373219);;中央高校基本科研业务费项目“政府干预、产业政策与企业行为”(批准号20720181109

Ecological characters of zooplankton in middle area of Subei Shoal in spring and summer

根据2009年5月和8月在苏北浅滩33°04′--33°12′、121°02′--121°12′水域两个航次浮游动物调查,分析了该水域春夏季浮游动物数量分布、种类组成和优势种特征。结果表明,该区浮游动物优势种季节演替明显,春季(5月)主要优势种为真刺唇角水蚤(lAbIdOCErA EuCHAETA)、小拟哲水蚤(PArACAlAnuS PArVuS)、左突唇角水蚤(l.SInIlObATA)、中华哲水蚤(CAlAnuSSInICuS);夏季(8月)主要优势种为真刺唇角水蚤、百陶箭虫(SAgITTA bEdOTI)、太平洋纺锤水蚤(ACArTIA PACIfICA)。各优势种的季节变化主要受温度影响,呈现夏季暖温种减少、暖水种增多的趋势。春、夏季浮游动物平均生物量分别为1 091.23 Mg/M3和487.11 Mg/M3,平均丰度为1 855.59个/M3和871.37个/M3,春季生物量和丰度都明显高于夏季。苏北浅滩大丰水域春夏季浮游动物数量较高,生物多样性好,群落结构稳定,可为该区各种鱼类及其仔稚幼鱼提供丰富饵料,是鱼类良好的产卵和育幼场所。Based on the zooplankton samples collected from the middle area of Subei Shoal(33°04′～33°12′,121°02′～121°12′) during May & Aug 2009,the ecological characters of zooplankton in the area were studied,such as the quantity,dominant species and season changes.The result showed that the succession of dominant species in the two seasons was obvious.Labidocera euchaeta,Paracalanus parvus,L.sinilobata and Calanus sinicus were the primary dominant species in spring(May).L.euchaeta,Sagitta bedoti,Acartia pacifica were the primary species in summer(Aug.).The seasonal variations of dominant species were mainly determined by the change of temperature.In summer the species were decreased and the warm water species added.The average biomass of zooplankton was 1 091.23 mg/m3 in spring and 487.11 mg/m3 in summer.Moreover,the average abundance of zooplankton was 1 855.59 d/m3 in spring and 871.37 d/m3 in summer.According to the large quantity and high diversity of zooplankton in the studied area,in Subei Shoal,some fishes' spawning and nursing grounds provided the abundant food for the fish larvae and juveniles.国家重点基础研究发展计划(973计划)项目(2010CB428705);国家自然科学基金项目(40776077

Relating the distribution of zooplankton abundance in the coastal waters of central Fujian Province to the seasonal variation of water masses

根据2009—2010年在福建中部近海24°55'—25°13'n、119°11'—119°32'E水域冬、春、夏3个季节的调查资料,探讨了该水域浮游动物总丰度与生物量的平面分布、季节变化及其与台湾海峡水团变化的关系。结果表明,调查水域浮游动物的数量在冬、春之交变化较大,而在春、夏季变化较小。浮游动物冬、春两季的平均丰度分别为8.90个/M3和245.65个/M3,夏季为236.82个/M3。冬、春两季,该水域浮游动物的分布特征相近。其数量在近岸较高,向外侧水域逐渐降低。冬季浮游动物的丰度最高为31.56个/M3,春季最高达到831.67个/M3。中华哲水蚤(CAlAnuS SInICuS)是冬、春季影响总丰度变化最主要的种类。与冬、春季不同,夏季浮游动物的数量在离岸水域较高,丰度最高达1053.13个/M3,而在近岸较低,最低值仅19.17个/M3。汉森莹虾(luCIfEr HAnSEnI)、双生水母(dIPHyES CHAMISSOnIS)是影响总丰度变化最主要的种类。浮游动物在各季的不同分布特征与台湾海峡的季节性水团变化有关。受季风转换影响,从冬季到夏季,海峡内沿岸流势力逐渐减弱,台湾暖流水势力逐渐增强,并影响到沿岸的水文环境。这导致调查水域内浮游动物的优势种类由暖温种向暖水种演替。由于冬、春季的重要优势种类中华哲水蚤与夏季的汉森莹虾、双生水母具有不同的温度适应性,受不同性质水团的影响,在近岸和离岸水域各自呈现出不同的数量高低。从而进一步影响到各季浮游动物总数量的分布。In three oceanographic surveys conducted in the coastal waters of central Fujian Province(24°55′—25°13′ N,119°11′—119°32′ E) in December 2009 and April and August 2010,the abundance,biomass,horizontal distribution,and seasonal variation of zooplankton were investigated,and their relation to the seasonal variation of water masses in the Taiwan Strait was examined.The results showed that the numbers of zooplankton changed between winter and spring,but remained steady between spring and summer.In winter and spring,the zooplankton showed similar patterns of distribution,though the distribution pattern was different in summer.The average number of zooplankton was 8.90 ind./m3 in winter and 245.65 ind./m3 in spring.In these two seasons,the zooplankton were most abundant in nearshore waters and gradually diminished offshore.In summer,the average number of zooplankton was 236.82 ind./m3.The zooplankton abundance in nearshore waters was low,but the zooplankton were abundant in offshore waters.To ascertain which species made the greatest contribution to these distribution patterns,the regression contribution of each dominant species′ abundance was computed.In winter and spring,Calanus sinicus was the species whose distribution determined the distribution of zooplankton abundance.In summer,Lucifer hanseni and Diphyes chamissonis exerted the greatest influence on the distribution of zooplankton abundance.As a warm-temperate species,Calanus sinicus usually prospers in low-temperature waters.By contrast,Lucifer hanseni and Diphyes chamissonis are warm-water species;they are usually abundant in high-temperature waters.The adaptability of these three species to water temperature is an important factor in determining the distribution patterns of zooplankton abundance in each season.However,the most important factor is the seasonal variation of the water masses in the Taiwan Strait.This variation leads to the seasonal alternation of the dominant species.In winter,the west side of the Taiwan Strait is controlled by China′s coastal water,which has a low temperature.The dominant species in the investigated waters in winter were warm-temperate species like Calanus sinicus.In spring,as the northeast monsoon weakens,China′s coastal water wanes and the Taiwan Warm Current becomes stronger.However,the west side of the Taiwan Strait is still controlled by China′s coastal water so warm-temperate species are still dominant.In winter and spring,the offshore water has a relatively high temperature because of the Taiwan Warm Current.Correspondingly,in the offshore water Calanus sinicus had a low abundance.The greatest abundance of Calanus sinicus was in the nearshore water.In summer,the southwest monsoon begins and the Taiwan Warm Current dominates.The major species were mainly warm-water species,such as Lucifer hanseni and Diphyes chamissonis.In summer,the water is heavily stratified,and there is an upwelling of bottom water in the nearshore region of the western side of the strait.As a result,the water temperature in this region was the lowest.Accordingly,warm-water species such as Lucifer hanseni and Diphyes chamissonis,were less abundant in the nearshore water.The different distribution patterns of these important zooplankton species further influenced the total abundance and overall distribution patterns in different seasons.国家重点基础研究发展计划(973计划)项目(2010CB428705);国家自然科学基金项目(40776077

The influence of upwelling and water mass on the ecological group distribution of zooplankton in Zhejiang coastal waters

依据2010年4月、7月和11月对浙江中部近海上升流海域进行的海洋调查资料,运用定量、定性方法,探讨了上升流对该海域浮游动物生态类群分布的影响。结果表明:3个季节共鉴定浮游动物64种,桡足类占主要优势,包括5个生态类群,分别是暖温带近海种、暖温带外海种、亚热带近海种、亚热带外海种和热带大洋种。在种类数组成上,春季以暖温带近海种为主,夏季则是亚热带近海种和亚热带外海种居多,秋季也是亚热带种居多,其中夏季暖温带种种类数要高于春季和秋季,这一现象与同时期东黄海沿海有所不同,主要是由于上升流将一些在海洋底部度夏的暖温种带至海洋表面造成的。此外,3个季节生态类群都是以近海种为主,表明沿岸流是影响这一海域的最主要的水团。在丰度组成上,4月暖温带近海种占总丰度的98.79%,7月暖温带近海种也是组成丰度的重要部分,10月则是亚热带近海种丰度最高。丰度组成所反映的规律与种类数组成规律一致。上升流的存在导致夏季近海暖温带种大量出现,是影响这一海域浮游动物生态类群组成的重要因素;受长江径流和椒江径流的影响,近海种成为主要生态类群,是这一海域浮游动物的一个重要的生态特征。The Zhejiang region experiences coastal upwelling characterized by low temperatures and high salinities throughout the year but particularly during the summer months.The upwelling in this area brings nutrients from the bottom to the surface,providing nutrients for large numbers of breeding plankton.The large quantities of zooplankton are a major food source for many fish and consequently the offshore waters of Zhejiang are productive fishing grounds.Another effect of the upwelling is that temperate warm water species that normally occur in deeper waters and offshore species are taken along with the current resulting in shifts in local zooplankton species composition and changes to the ecological structure and function of this group.This research was based on data from three oceanographic surveys in the offshore waters of the Yushan fishery during April,July and November of 2010.Using quantitative and qualitative methods,the primary aim of this paper was to examine the influence of upwelling on the ecological distribution of zooplankton in this area.A total of 64 species mainly dominated by copepods were identified which were classified into five major ecological groups including coastal temperate warm water species,offshore temperate warm water species,coastal subtropical water species,offshore subtropical water species and oceanic tropical water species.Coastal temperate warm water species were prevalent in spring,coastal subtropical water species and offshore subtropical water species in summer and subtropical species in autumn.The higher abundance of temperate warm water species such as Calanus sinicus,Paracalanus parvus and Sagitta nagae in summer relative to spring and autumn was primarily caused by the upwelling that transported these species from the bottom to the surface.This phenomenon is very different from the hydrodynamic processes that occur in the East and Yellow China Seas.Additionally,coastal species were the dominant zooplankton group,which means that coastal currents have the greatest influence on species composition in these waters.According to the research of Hu Dun-Xin,the main power of the Zhejiang coastal upwelling comes from the upward movement of subsurface water from the Kuroshio current as it follows the continental shelf.The subsurface water of the Kuroshio current runs southeast to northwest and shifts to the east forming an upwelling when it is blocked by the Chen Island Archipelago.With low temperatures and high salinities,the subsurface water of the Kuroshio current carries temperate warm water species and offshore species.As a result,during periods of coastal upwelling temperate warm water species are carried to the surface from the bottom,producing the unusual phenomenon were the number of temperate warm water species in summer is higher than in spring and autumn,contrary to the situation in other areas that have similar climatic conditions.In terms of abundance,coastal temperate warm water species accounted for 98.79% of the zooplankton in April and also a large proportion in July,whereas coastal subtropical water species were the dominant zooplankton group in October.Upwelling leading to the appearance of large numbers of temperate warm water species is a key factor affecting the ecological composition of zooplankton in these waters.The dominance of coastal species that are influenced by Jiao-Jiang runoff was a prime ecological characteristic of zooplankton in this region.国家自然科学基金项目(40776077); 国家重点基础研究发展计划(973计划)项目(2010CB428705