菰属系统与演化研究——花粉形态

本文首次报道了菰属Zizania L. 及其有关属，共7属，13种，3变种，1变型的花粉形 态。通过光学显微镜和扫描电镜，对其花粉的形状、外壁的层次及纹饰等进行了观察。经过研 究，笔者认为：  菰属应置于禾本科稻族内；菰属在稻族内的演化及菰属内的种间演化均存在 平行演化的现象；菰属在全世界有4种2亚种。这些结论大都吻合笔者对其它形态特征的研 究结果。     

二语心理词汇与词汇学习策略的相关性研究

通过词汇联想测试和词汇学习策略的使用情况调查,并进行两者的相关分析,探讨了中国英语学习者的二语心理词汇与词汇学习策略的关系。结果表明,两者在很多方面呈现复杂而显著的联系,这对二语词汇教学有一定的指导意义。     

Preservice teachers’ implementation of formative assessment in English writing class: Mentoring matters

This multiple-case study investigated the experience of three preservice teachers who attempted formative assessment (FA) strategies in their English as a second language writing class during their teaching practicum in a secondary school in Hong Kong. Based on data from 17 lesson observations and 24 interviews, the study examined the three teachers’ implementation of FA strategies during cycles of pre-, while- and post-writing stages. Also analyzed are the teachers’ reflections on and their mentors’ and students’ evaluation of their FA implementation. The study found the teachers could translate their understanding of FA principles into teaching and assessment strategies appropriately, but the school’s accountability culture worked against their innovation. School mentors’ open-mindedness and support to their FA attempts were found to be crucial. The findings are discussed centering on key issues in the relational, developmental and contextual dimensions of the teaching practicum and their impact on preservice teachers’ practice and attitude.     

黄枝油杉和矩鳞油杉的核型研究

本文研究了黄枝油杉Keteleeria calcarea Cheng et L．K．Fu．和矩鳞油杉Keteleeria   oblonga Cheng et L. K. Fu. 的核型。  并与江南油杉 K．cyclolepis Flous．和台湾油杉  K.   formosana Mast. 的核型比较，讨论四种油杉核型进化趋势。  黄枝油杉核型公式K(2n)=   24＝16m+8sm;矩鳞油杉核型公式K(2n)=24＝18m+6sm。  黄枝油杉在第1、3、6号   染色体短臂上具次缢痕;而矩鳞油杉在第2、4、6号染色体短臂上具次缢痕。二者均属较对称  的“2A“核型。  四种油杉核型进化趋势是江南油杉→矩鳞油杉→黄枝油杉→台湾油杉。     

不同视角下的语言迁移

语言迁移是二语习得过程中的特殊现象,母语干扰说、创造性重构说和深层共享假设从不同的视角对母语在二语学习过程中的角色进行了分析和探讨。母语的角色从被否定到重新被肯定的转变,揭示出语言迁移是一个与其他因素相互作用的复杂过程。     

酸角果荚色素的提取及性能初探

以酸角果荚为原料,用碱液提取天然棕色素,并对所提取的色素进行初步理化性质研究．实验结果表明：该色素在弱酸、中性、弱碱性条件下均稳定,对光、热稳定性好,对大部分金属离子稳定,是一种应用范围较广的天然色素,也为酸角的利用提供了一条新的途径．     

百合属中的四合花粉兼论玫红百合的分类问题

根据我们对国产百合属(Lilium)引种植物花粉形态的观察，已知该属有二个分类群具四合花粉, 本文依据花粉形态、外部形态及地理分布的特点，对其分类问题进行了讨论。