求质与创新:"非核心期刊"类学报反学术失范出版活动的视点及选择

“非核心期刊”类高校学报在总体上处于学术出版界的末端。相对于核心期刊,其偏轻于质量要求的审稿标准和稿源质量较差的现实,是形成较多失范之作的客观原因。因应当前学术界反学术失范形势的需要,“非核心期刊”类学报应该回归到以“传播优质的学术文化”为根本职能的定位上来,丰富角色内涵,创新工作方式,在出版活动中体现防范和规制学术失范现象的特点,强化抵御失范之作的意识和能力,切实履行反学术失范的职责。     

云南思茅常见大型食用真菌

思茅雨量丰富，光照充足，一年四季气候湿润，森林覆盖面积大，孕育了丰富的真菌植物。经采集、调查和鉴定，思茅常见的食用大型真菌植物有36种。     

广西附地菜属一新种

 Trigonotis  leyeensis  W .  T.  Wang  is  described  as  new  fromnorthwestern Guangxi.     

具有强迫项的广义Lotka-Volterra竞争系统的正周期解

对于具有周期性强迫项的Lotka-Volterra型种群竞争周期系统，我们证明了如果强迫项为负，则系统至少有两个正周期解.     

纳米科技及纳米材料的种类特性

纳米材料由于其无与伦比的奇异特性和非凡的特殊功能在各行各业中将有空前的应用前景，纳米科技将成为21世纪新技术革命的主导中心。     

广东植物区系学研究──Ⅰ.自然地理条件和植被的主要优势种

论述了广东现代植物区系生长和发育的基本自然地理条件，同时对组成植被的主要优势种和建群种进行了研究．     

Algal community composition and abundance near the confluence of the Jialing and Yangtze Rivers and in Shuanglong Lake in Chongqing, P. R. China

To understand the potential impact of the Three Gorges Reservoir on the aquatic ecosystem after the damming of the Yangtze River, we studied the community composition and temporal abundance distribution of algae in two types of water bodies： a segment of the Jialing River near its confluence with the Yangtze River as an example of the river-lake type, and Shuanglong Lake in Chongqing as an example of the lake type. In total, 107 species belonging to 58 genera of 7 phyla were identified in the study area of the Jialing River, dominated by three groups with 49.5% diatoms, 29.0% chlorophytes, and 11.4% cyanobacteria in the community composition. There were 122 species belonging to 66 genera of 8 phyla in Shuanglong Lake, dominated by the same three groups with 19.7% diatoms, 48.4% chlorophytes, and 22.2% cyanobacteria. The densities of total algae and individual dominant groups were all much higher in the lake. More species of diatoms were found in the river-lake segment; whereas more chlorophyte species and cyanobacteriaum species were in the lake. There were 17 dominant species including 8 diatoms, 4 chlorophytes, 3 cyanobacteria and 2 cryptophytes in the river-lake segment, and 21 species in the lake, including 2 diatoms, 9 chlorophytes, 6 cyanobacteria, 3 cryptophytes and a dinoflagellate. In eutrophic conditions, chlorophytes and cyanobacteria may proliferate in a lake-type area and diatoms may cause algal bloom in a relatively faster-flow lake-river type area.     

高领藓属(高领藓科)一新种——卷尖高领藓

描述了高领藓属Glyphomitrium(高领藓科Glyphomitriaceae)一新种——卷尖高领藓G. tortifolium Y. Jia, M. Z. Wang & Y. Liu。它因体形大,叶片卷曲和雌苞叶具长尾尖而与G. elatum Takaki相似,但是又因它植物体更大,叶片狭披针形,雌苞叶在骤尖基部两侧略凹陷而区别于后者。