英语中两种名词属格的认知对比

英语中,名词属格有两种形式即’s属格结构和＂名词＋of＋名词＂结构。由于这两种结构表达的都是所属关系,在译成汉语时都译成＂的＂,所以引起很多学者的关注。但是以往的研究和努力都是在划分两种属格的语义关系,通过区分语义关系的不同来找出两者用法上的差异。利用认知语言学的原型范畴理论探讨两种名词属格的属性及其互补性可以帮助英语学习者更清晰明了地掌握两种结构的使用规则,在应用中做出正确的选择和判断。     

Characterization of an endo-1,4-β-glucanase from Lilium longiflorum that functioned in pollen germination and pollen tube growth

Endo-β-glucanases play vital roles in the regulation of pollen tube growth. Here, a previously identified endo-l,4-β-glucanase from Lilium Iongiflorum （lily）, named LlpCell, was expressed in Escherichia coli, purified, and further investigated for its physiological function. The recombinant LlpCell protein hydrolyzed carboxy-methylcellulose （CMC） and exhibited activity towards laminarin from Eisenia. arborea and 1,3：l,4-β-glucan of barley. The pH for the optimum activity was 6.0 and the value of Km calculated from CMC was 5.0 mg/mL. Adding EDTA resulted in the total loss of the enzymatic activity, and this effect could be restored by the addition of Ca^2＋. Western blotting analysis showed that LlpCell protein was present in pollen grains and rehydrated pollen grains, and the amount of the protein was increased during pollen germinating, but not in the pollen tube. Consistently, the immunofluorescence labeling study with the antibody against LIpCell also indicated the presence of LIpCell at the begin-ning of germination, but not in the elongating pollen tube. Furthermore, incubation of LlpCell with pollen at the beginning of pollen germination increased the germination percentage and the length of pollen tube. All of these results suggested that LlpCell could play an important role in the regulation of lily pollen germination and the initiation of pollen tube growth.     

广西悠背蚱属二新种记述(直翅目:蚱科)

记述蚱科（Ｔｅｔｒｉｇｉｄａｅ）悠背蚱属（Ｅｕｐａｒａｔｅｔｔｉｘ Ｈａｎｃｏｃｋ）的２个新种,即白条悠背蚱（Ｅｕｐａｒａｔｅｔｔｉｘ ｌｅｕｃｏｎｏｔｕｓ ｓｐ．ｎｏｖ．）,条斑悠背蚱（Ｅｕｐａｒａｔｅｔｔｉｘ ｓｔｒｉｍａｃｕｌａｔｕｓ ｓｐ．ｎｏｖ．）。     

砂珍棘豆之学名考

本文认为ＯｘｙｔｒｏｐｉｓｒａｃｅｍｏｓａＴｕｒｃｚ．与Ｏ．ｇｒａｃｉｌｌｉｍａＢｕｎｇｅ同为一种，砂珍棘豆的合法学名应为Ｏ．ｒａｃｅｍｏｓａＴｕｒｃｚ．     

山东堇菜属（Viola）植物花粉形态研究及其分类意义

通过光学显微镜和扫描电镜观察了山东Viola属20种、亚种的花粉超微结构,探讨了花粉特征的分类意义,研究揭示了各个种花粉粒的大小、形状、萌发孔沟类型及表面纹饰等特征,是研究该属分类的新资料。     

中国重科一新属一新种(目:粉亚目)

本文记述重科一新属及一新种。     

福建省盖蛛属一新种（蜘蛛目：皿蛛科）

记述了采自福建省将乐龙栖山的盖蛛属Ｎｅｒｉｅｎｅ一新种，模式标本保存于湖北大学生态学研究所。