Use of a mnemonic technique to teach young children foreign language vocabulary

Children 3 to 6 years of age learned simple Spanish vocabulary items using an adaptation of the keyword method of foreign language vocabulary learning. Using this version of the keyword method, the learner remembered a picture of the translation referent of the vocabulary item interacting with the referent of a concrete English word which sounded like part of the foreign word (the keyword). Children who used the keyword method remembered more vocabulary translations than children who were not instructed in keyword method usage.     

关于有机反应SN1机理的注记

就单分子亲核取代反应 (SN1)的几个特征进行了探讨 ,指出了从反应产物的结构或生成数量的关系可判别SN1反应     

J2EE数据持久层的ORM设计模式

基于J2EE多层体系结构的数据持久层几种主流的解决方案：使用SQL/JDBC在业务类中硬编码、使用SQL/JDBC在存储过程或者单独的数据类中硬编码、CMP容器管理持久实体Bean、JDO对象一关系／映射模式（ORM模式）进行了简要介绍，分析了数据持久层的ORM设计模式，包括决定ORM实现工具设计标准的四个级别，其中完全的对象映射支持组合、继承、多态和“可达的持续性”等复杂的对象模型，本文对完全的对象映射的功能进行了阐述。最后，作为ORM例证，介绍了一个Java对象持久层轻量级封装框架Hibernate，探讨了它在实际应用中的技术优势。     

N-苯甲酰基-N′-(4-溴苯基)硫脲的合成

用二氯甲烷作溶剂，以PEG－400为催化剂，合成N－苯甲酰基－N′－（4－溴苯基）硫脲，并用红外光谱对其结构进行表征。     

“V你的N！”句式探析

“V你的N!”是汉语中一类特殊的祈使句式,是一种有标记祈使句式,其使用与言语交际中的移情策略有关,说话人采用凸显听话人来降低对听话人的移情度,从而表达对听话人的某种负面情态。此外,“V你的N!”是一种主观性很强的祈使句式,这种句式不仅仅表达祈使义,而且隐含着丰富的主观评价义。     

思政课程与课程思政双向融合的具体模式

思政课程和课程思政实现双向融合,需要二类课程的互相渗透,互为表里。二者渗透的具体模式可以设置为“1+N模式”,即一个思政教师和若干专业相同或相近的教师进行协同。这种模式具有现实性和可行性,效率较高,最易接受。在推进课程融合的过程中,可以从顶层设计、实施教师教授方式的转变以及学生提供考核促进三个方面进行着力。     

N8分子平衡几何构型的预测

用CNDO／2半经验量子化学计算方法对N8分子平衡几何构型作了预测，从计算结果看拱桥式结构为最稳定的构型，正方体型、畸变的拱桥式和正八面体型结构为较稳定构型，带二个双键的七员环构型是最不稳定的构型。     

芳基重氮盐—冠醚分子络合物的~(15)N和~(13)C核磁共振研究

本文报道一系列四氟硼酸芳基重氮盐与18-冠醚-6和二苯并24-冠醚-8形成分子络合物的~(15)N和~(13)C NMR,考察它们在络合前后的化学位移变化规律,结合取代基效应,推测这类络合物为重氮盐的π-电子由β-氮通过π-体系向冠醚提供电子而配位。在二苯并-24-冠醚-8络合物中,还可能存在π-π电子转移作用。     

绍鸭氮维持需要量的研究

本试验采用氮平衡试验法和无氮日粮法研究了绍鸭的氮维持需要（Nm），氮平衡试验结果：Nm与体重呈正相关，体重越大，Nm越大；单位体重的Nm与周龄呈负相关，周龄越小，单位体重的Nm越大，到20周龄后该值趋于稳定；单位代谢体重的Nm在整个试验过程的各龄段中没有显著差异，平均每天为454mg/kg。无氮日粮法结果：Nm与无氮日粮采食量呈负相关，随采食量减少，Nm增加，当无氮日粮采食量为零（绝食）时，Nm与氮平衡试验结果较接近，每天为467mg/kg。     

中国拟兰亚科的研究

Apostasioideae, a small subfamily of Orchidaceae, is largely distributed in tropical Asia with its northern limit extending to the Ryukyu Islands and south China. The first Chinese species of this subfamily was reported by E. D. Merrill (1927) based on a specimen collected from Hainan (McClure 9519, AMES), which he regarded as Apostasia wallichii R. Br. As later labelled by E. F. de Vogel, it is in fact identical with A. odorata Bl., a widespread spe- cies also found in southern Guangdong, Guangxi and Yunnan of China.  It was not until re- cently that the true A. wallichii was collected from southwestern Yunnan bordering on Burma, which is initially reported here.  In addition, an interesting new species, A. ramifera S. C. Chen et K. Y. Lang, is described from Hainan.       The only Chinese species of Neuwiedia has long been known as N. veratrifolia Bl. (of. Iconographia Cormophytorum Sinicorum 5: 602, t. 8034. 1976, and Flora Hainanica 4 180, t. 1078. 1977), which, however, was considered by de Vogel (1969) to be not found in China.  In de Vogel's revision, no Chinese taxon but a variety, N. zollingeri Rchb. f. var. singapureana (Baker) de Vogel, is cited with some doubt based on a specimen of Hainan (F. C. How 73122, in young fruit, AMES). N. zollingeri var. singapureana is in fact quite different from N. veratrifolia by having glandular hair, much shorter inflorescence and flattened filaments.  As recently pointed out by de Vogel and G. Barretto (in Journ. Taiwan Museum 37: 78. 1984), the plants found in Hongkong, as well as those in Guangdong and Yunnan, possess glandular hair and short inflorescence. They are identical with the Vietnamese species N. balansae Gagnep., which was reduced by de Vogel to a synonym of N. zollingeri var singapureana. E. F. de Vogel's suggestion seems to be acceptable except the varietal rank.  It is treated here as a se- parate species, N. singapureana (Baker) Rolfe, according to its fruit and hair characters.  Thus we have altogether one species of Neuwiedia and three species of Apostasia in China, including a new species and a newly recorded one.