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黄牛供体细胞处理及冷冻保存对核移植率的影响
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作者 郭杰 方南洙 《中国畜禽种业》 2012年第10期59-60,共2页
本试验以延边黄牛耳部皮肤成纤维细胞作为核移植供体细胞,研究不同的供体处理方式对体细胞核移植胚胎发育的影响。使用血清饥饿和汇合处理供体细胞,并进行了体细胞的冷冻保存,研究冷冻后的核移植效果。结果显示:(1)使用血清饥饿处理和... 本试验以延边黄牛耳部皮肤成纤维细胞作为核移植供体细胞,研究不同的供体处理方式对体细胞核移植胚胎发育的影响。使用血清饥饿和汇合处理供体细胞,并进行了体细胞的冷冻保存,研究冷冻后的核移植效果。结果显示:(1)使用血清饥饿处理和汇合处理后,均能提高重组胚的卵裂率及囊胚发育率。(2)未冷冻组重组胚卵裂率及囊胚发育率显著高于冷冻组(P<0.05)。 展开更多
关键词 延边黄牛 体细胞核移植 血清饥饿 汇合处理 冷冻
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Chinese EFL Learners' Actual Word Processing and Lexical Learning in Performing a Collaborative Output Task
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作者 牛瑞英 《Chinese Journal of Applied Linguistics》 2014年第3期309-333,406,共26页
The word processing depth hypothesis implies a positive association between learners' word processing and their lexical learning. In research, learners' task-inherent involvement load (i.e., word processing) has n... The word processing depth hypothesis implies a positive association between learners' word processing and their lexical learning. In research, learners' task-inherent involvement load (i.e., word processing) has not been found to be consistently associated with their lexical learning. Meanwhile, existing studies have not obtained consensus results, either, from directly associating learners' actual word processing and their lexical learning. Against this backdrop, this paper reports a study investigating the association between Chinese EFL learners' actual word processing and their lexical learning in performing a collaborative oral output task. Interactional and statistical analyses revealed that the participants engaged in four types of word processing; their overall word processing was significantly correlated with both their productive and receptive word acquisition and retention; their different types of word processing were significantly correlated with their productive word learning, but showed variances in correlations with their receptive word learning. The findings were discussed from the perspectives of word processing in collaborative output, word processing and lexical learning, and word processing and different modes of lexical learning. 展开更多
关键词 collaborative oral output actual word processing lexical learning association between actual word processing and lexical learning
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