显微图像分析技术在赤潮生物识别中的应用

为克服人工识别赤潮生物种类和数量时的困难，基于图像分析法对赤潮生物图像进行自动分析，针对赤潮生物显微图像的特点。研究图像的预处理、分割、特征提取和分类的处理过程，结合理论分析和实验结果。与其他自动分割方法进行比较，证明采用类别方差法可以有效进行赤潮生物图像的自动阈值分割，解决了赤湖生物显微图像自动分割的难题，采用形态学的方法，解决相连赤潮生物的分割问题，对获得的轮廓和灰度特征进行选择，作为分类器的测试和学习数据使用，建立分类树结构，采用树状判别机制实现几类赤潮生物的识别分类。实验结果表明，与人工识别相比，其识别正确率大于90％。     

齐齐哈尔市常见淡水藻类初报

本文采用活体观察、固定观察、绘图及显微摄影等方法,对从齐齐哈尔市5个不同水体中采取的淡水藻类进行了鉴定.鉴定到种的藻类69种,隶属16科41属.     

Interpreting grain-size trends associated with bedload transport on the intertidal flats at Dafeng, central Jiangsu coast

IN THE MARINE ENVIRONMENT, IT IS OFTEN DIFFICULT TO IDENTIFY THE NET SEDIMENT TRANSPORT PATHWAY BECAUSE OF THE COMPLICATED HYDRODYNAMICS AND SEDIMENT SOURCES. GAO AND COLLINS HAVE RE-EXAMINED A 1-D MODEL ORIGI- NALLY DERIVED BY MCLAREN AND BOWLES AND DEVE…     

菌藻共生系统处理污水的研究及应用前景

利用菌藻共生系统处理污水是一项资源化技术，也是净化水体富营养化的一个有效途径．文章主要介绍了菌藻共生系统净化水质的机理和国内外利用菌藻共生系统处理污水的研究成果，以及今后的发展趋势．     

Study on sterols from brown algae （Sargassum muticum）

Significance of sterol compounds in studying bio- logical precursors, evolution and application of bio- markers in geological bodies and fossil fuels such as oil and coal resulted in a research upsurge during the 1970s―1980s, and a lot of papers were the…     

疏水缔合阳离子淀粉的制备及其对滇池含藻水的絮凝研究

 采用氧化还原引发体系,通过反相悬浮聚合技术,进行四元St-OA-AM-DMDAAC聚合,合成疏水缔合阳离子淀粉;研究其对滇池含藻水的絮凝.结果表明:在m(St):m(AM):m(DMDAAC):m(OA)=4:8:1.5:0.6时,40℃反应3 h,单体转化率达92.4%,接枝率63.8%,黏均相对分子质量3.26×10⁶,阳离子化度7.3%;在处理pH为6.0的滇池含藻水时,加入量为15 mg/L时,透光率及COD_Cr去除率分别达93.5%,71.3%;市售PAM-C为91.3%及69.2%;同时疏水缔合阳离子淀粉用量在10-25 mg/L,pH在6-10范围内,对滇池含藻水有较好的絮凝效果.     

Progress in phototaxis mechanism research and micromanipulation techniques of algae cells

Phototactic movement is a characteristic of some microorganisms' response to light environment. Most of the algae have dramatically phototactic responses, underlying the complicated biological, physical and photochemical mechanisms are involved. With the development of the micro/nano and sensor techniques, great progress has been made in the research of the algae phototaxis. This review article summarizes the progress made in the research on the functional phototactic structures, the mechanisms of photo-response process and photodynamics of phototaxis in algae, and describes the latest developed micro-tracking technique and micromanipulation technique. Moreover, based on our own research results, the potential correlation between the phototaxis and photosynthesis is discussed, and the directions for future research of the phototactic mechanism are proposed.     

浮游植物光合色素的提取方法

光合色素是评价浮游植物生物量和生产力的重要指标,是海洋调查中必不可少的生化参数,而进行色素分析的首要步骤就是将色素从浮游植物中提取出来。色素提取的效率决定于溶剂的渗透力和溶解能力,而不能单单依赖机械破碎。文章综述了浮游植物光合色素的三种主要提取技术:直接浸泡提取法、浸泡研磨提取法和超声波破碎浸泡法,并从提取能力、保真性、广泛适用性、准确性、简单和安全六个方面进行评价。得到将DMF萃取液再超声破碎是最佳的提取方法,所有色素的提取率几乎达到100%。     

福建金门岛的藻类植物

福建金门岛淡水藻类的调查，经鉴定有50属155种21变种1变型（不包括硅藻门），隶属于5个门．它们分别是蓝藻门、甲藻门、裸藻门、绿藻门和黄藻门，绿藻门种类最多，有107种16变种1变型．其中，绿藻门栅藻属的伪瑞士栅藻Scenedesmus pseudohelveticus Kirjakov．和普通栅藻Scenedesum communis Hegew．在我国是第一次报道．