锌介导的炔酰胺串联氧化/卤化反应合成α-卤代酰胺

α-卤代酰胺是一类十分重要的羰基化合物,广泛存在于众多天然产物和生物活性分子之中.本工作实现了通过卤化锌同时作为催化剂和卤素源的炔酰胺串联氧化/卤化反应,从而避免使用其他的外加卤化试剂.该反应可以中等到良好的产率得到一系列合成上非常有用的α-卤代酰胺化合物

Mechanisms on Mangrove Ecosystem Degradation from Waves by Boats

通过分析波浪在林内和光滩上传播途径,阐述了船舶引起的频繁巨浪造成红树植物死亡、林内动物种群和数量减少、滩涂断层及红树植物难以自然扩展等生态系统退化机理;在此基础上提出消除和减少船舶兴波对红树林生态系统危害的有效对策。In this paper,different paths of wave spreading in the bare mudflat and vegetated areas were analyzed,and damages from boat-generated waves to mangrove ecosystems were summarized as follows: the death of mangrove plants,decrease of benthic animal species and quantity,erosion of tidal flat,restriction of mangrove natural extension.Finally,some feasible strategies were proposed to eliminate and/or reduce hazards from boat-generated wave to mangrove ecosystems.国家海洋局海洋公益性行业科研专项(200805072);国家海洋局908项目(908-02-04-04);教育部新世纪优秀人才计划资

长臀遗传多样性的微卫星标记分析

利用55对微卫星引物对珠江和海南长臀基因组DNA进行了扩增,有23对能扩增出清晰条带,其中有11对在珠江长臀中表现多态性,9对在海南长臀中表现多态。这些多态性位点的等位基因数在2~4之间,平均等位基因数2.91个。结果显示:珠江长臀的平均观测杂合度(Ho)是0.45,平均期望杂合度(He)是0.46,平均多态信息含量(PIC)为0.377;海南长臀的平均观测杂合度(Ho)和平均期望杂合度(He)分别是0.58、0.53,平均多态信息含量(PIC)为0.426。两群体间的遗传相似度为0.875、

Fractal characteristics and related affecting factors of particle size distribution in mangrove soils in Dongzhai Harbor of Hainan

应用分形理论分析了海南东寨港红树林土壤粒径分布的分形特征及其影响因素,海南东寨港土壤的分形维数为2.302～2.575,分形维数的大小与土壤中的粘粒、盐分、有机质、全氮含量呈显著正相关,外滩红树林土壤的分形维数低于中滩和内滩;随着土壤质地由砂壤土、轻壤土、中壤土、重壤土的变化,分形维数逐渐增大;从陆到海土壤分形维数逐渐减小。群落类型、土壤质地、滩位、含盐量、有机质、全氮含量等是影响海南东寨港红树林土壤分形维数的主要因子。The analysis with fractal theory on the fractal characteristics and related affecting factors of particle size distribution in mangrove soils in Dongzhai Harbor of Hainan showed that the fractal dimension of mangrove soils ranged from 2.302-2.575.There was a significant positive linear relationship between the fractal dimension and the contents of soil clay,salts,organic matter and total nitrogen.The fractal dimension was lower in outside beach than in middle and inner beach,and changed with soil texture,being in the order of sandy loam<light loam<medium loam<heavy loam.From land to sea,the fractal dimension decreased gradually.The main factors affecting the fractal dimension were community type,soil texture,beach position,soil salinity,and organic matter and total nitrogen contents.教育部新世纪优秀人才计划(NCET);; 国家自然科学基金资助项目(40476040

Pig farm waste treatment and recycling

随着养猪业向集约化、规模化发展,猪场粪污排放过度集中,超过周边环境承载负荷,造成环境污染问题日益严重。本文综述了国内外规模化猪场的粪污处理技术,为规模化养猪场粪污治理与循环再利用模式建立,实现“达标“排放或冲栏回用无排放提供参考。As pig farming becomes increasingly concentrated and scaling up in size,its sewage discharge and waste disposal has overwhelmed the surrounding areas causing deepened concerns on environmental pollution.This paper reviews the related literature published in China,as well as foreign countries.It is intended to provide the pig farmers with available information on technologies for the effluent treatments and material recycling so that their operations could be improved and a pollution-free environment realized.国家科技支撑项目(2007BAD89B13);福建省科技星火计划项目(2008S0055);福州市科技计划项目(2007-N-85);福建省农科院科技支撑项目(Zymb0805

试论中国古代海洋文化及其农业性

中国有着漫长的海岸线,沿海地区自古有着发达的农业经济区。本文从海洋文明的曙光、海洋类型的生产、生活、科技、自然观、文学、艺术、宗教、迷信活动、风俗习惯以及海洋政策等方面来论证:中国古代不仅有着海洋文化,而且是充分发展的。本文进一步认为中国传统海洋文化有着十分明显的农业性。如果把西方的海洋文化称为海洋商业文化,那末中国的海洋文化可称为海洋农业文化。两者均是海洋文化的基本类型