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Problems in Chinese Teachers＇ Instructional Discourse --From the Perspective of Authenticity

Sino-US English Teaching 2016年第2期13卷 162-168页

作者： DING Xiao-xiao China Youth University of Political Studies Beijing China

In the English language classroom, authenticity is a basic discoursal feature of teachers＇ instructional discourse. Without authenticity, there will be a mismatch between what students learn in the classroom and what they use in real life. However, the notion of authenticity varies with the change between the natural mode and pedagogic mode in the classroom. Therefore, based on this assumption, retrieving and analyzing data from the corpus and classroom videos, the present paper identifies two categories of problems in Chinese teachers＇ instructional discourse. Sample extracts are discussed and predictions are made on how teachers＇ failure to produce authentic discourse may result in ineffective teaching and learning.

关键词： teachers' instructional discourse authenticity genuineness unnaturalness

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Barcoding Identification of Guangchenpi（Citri Reticulatae Pericarpium）

Barcoding Identification of Guangchenpi（Citri Reticulatae P...

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第十四届全国中药和天然药物学术研讨会

作者： Hui Cao Guiling Yang Pangchui Shaw China Academy of Chinese Medical Sciences National Engineering Research Center for Modernization of traditional Chinese Medicine Guangdong Food and Drug Vocational College The Chinese University of Hong Kong

Chenpi（Citri Reticulatae Pericarpium） is the dried peel of the mature fruits of Citrus reticulata Blanco.,which is widely used in drugs and foods as it is involved in 131 out of all 1063 formulae in Chinese Pharmacopoeia（2010 edition）.It grows on a wide range of southern China,there are various cultivars such as ’Chachi’,’Dahongpao’,’Unshiu’ and Tangerina’ and diversity of origins in the market,’Chachi’ from Xinhui in Guangdong which is well known as’ Daodi’（genuineness）-***,current identifying methods are mainly based on macroscopic and microscopic description,single component detection,which hardly demonstrated ***,it is necessary to apply a systemic research mean to be useful for identification of Citri Reticulatae *** study focus on DNA barcoding（psbA-trnH、rbcL、 matK、 ITS）.Based on the our results by DNA detection and statistical analysis,it shows that the difference between Guangchenpi and other Chenpi in barcode level,which points out the molecular marker of genuineness for Guangchenpi.

关键词： Citri Reticulatae Pericarpium genuineness DNA barcoding

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