6 results on '"Guan, Xueying"'
Search Results
2. Modelling extendedly reacting porous absorbers with the Kirchhoff-Helmholtz integral equation
- Author
-
Guan, Xueying and Guan, Xueying
- Published
- 2022
Catalog
3. Genome-wide analysis reveals rapid and dynamic changes in miRNA and siRNA sequence and expression during ovule and fiber development in allotetraploid cotton (Gossypium hirsutum L)
- Author
-
Pang, Mingxiong, Pang, Mingxiong, Woodward, Andrew W, Agarwal, Vikram, Guan, Xueying, Ha, Misook, Ramachandran, Vanitharani, Chen, Xuemei, Triplett, Barbara A, Stelly, David M, Chen, Z Jeffrey, Pang, Mingxiong, Pang, Mingxiong, Woodward, Andrew W, Agarwal, Vikram, Guan, Xueying, Ha, Misook, Ramachandran, Vanitharani, Chen, Xuemei, Triplett, Barbara A, Stelly, David M, and Chen, Z Jeffrey more...
- Abstract
Background Cotton fiber development undergoes rapid and dynamic changes in a single cell type, from fiber initiation, elongation, primary and secondary wall biosynthesis, to fiber maturation. Previous studies showed that cotton genes encoding putative MYB transcription factors and phytohormone responsive factors were induced during early stages of ovule and fiber development. Many of these factors are targets of microRNAs (miRNAs) that mediate target gene regulation by mRNA degradation or translational repression. Results Here we sequenced and analyzed over 4 million small RNAs derived from fiber and non-fiber tissues in cotton. The 24-nucleotide small interfering RNAs (siRNAs) were more abundant and highly enriched in ovules and fiber-bearing ovules relative to leaves. A total of 31 miRNA families, including 27 conserved, 4 novel miRNA families and a candidate-novel miRNA, were identified in at least one of the cotton tissues examined. Among 32 miRNA precursors representing 19 unique miRNA families identified, 7 were previously reported, and 25 new miRNA precursors were found in this study. Sequencing, miRNA microarray, and small RNA blot analyses showed a trend of repression of miRNAs, including novel miRNAs, during ovule and fiber development, which correlated with upregulation of several target genes tested. Moreover, 223 targets of cotton miRNAs were predicted from the expressed sequence tags derived from cotton tissues, including ovules and fibers. The cotton miRNAs examined triggered cleavage in the predicted sites of the putative cotton targets in ovules and fibers. Conclusions Enrichment of siRNAs in ovules and fibers suggests active small RNA metabolism and chromatin modifications during fiber development, whereas general repression of miRNAs in fibers correlates with upregulation of a dozen validated miRNA targets encoding transcription and phytohormone response factors, including the genes found to be highly expressed in cotton fibers. Rapid and more...
- Published
- 2009
4. A case study of selecting suppliers in China
- Author
-
Guan, Xueying, Wang, Shenning, Guan, Xueying, and Wang, Shenning
- Abstract
Based on current competitive market, supply chain becomes to be more and more important to overall corporate strategy. Finding good suppliers makes much more senses for the companies nowadays as purchasing is one of the basis parts on the upstream of the supply chain. China has been very successful on turning itself into a production powerhouse in just two decades, so how to find and select the convenient suppliers in China is a very important and modern topic. The thesis has been starting with the introduction part, where the importance of outsourcing, Chinese current manufacturing capabilities and some other factors will be introduced. Besides, the purpose of this thesis is to study and analysis the criteria and processes are used by PCH International on the selection of suppliers in China. The authors try to understand how foreign companies find the right Chinese suppliers based on a case studying, which is PCH International, an Irish company. Within the theoretical framework part, the authors discussed the supplier selection criteria firstly, which are very important and necessary to evaluate suppliers’ performances. Then the thesis was provided with an insight into some common theoretical methods, which followed by the supplier selection processes. Total Cost of Ownership, Data Envelopment Analysis and Mathematical Programming are presented in basic term. The part in the theoretical review was informed about the structure of the supplier selection process, starting with the preparation step, followed by prequalification and evaluation steps and resulting in the final selection of the suppliers. In the methodology part, the approach for the research will be presented, it will be divided into four parts, which are choice of topic, choice of method, data collection, research’s validity and reliability. The empirical finding part consists of practical information which was provided by the case company mentioned above through questionnaires and interviews. The value more...
- Published
- 2009
5. Genome-wide analysis reveals rapid and dynamic changes in miRNA and siRNA sequence and expression during ovule and fiber development in allotetraploid cotton (Gossypium hirsutum L)
- Author
-
Pang, Mingxiong, Pang, Mingxiong, Woodward, Andrew W, Agarwal, Vikram, Guan, Xueying, Ha, Misook, Ramachandran, Vanitharani, Chen, Xuemei, Triplett, Barbara A, Stelly, David M, Chen, Z Jeffrey, Pang, Mingxiong, Pang, Mingxiong, Woodward, Andrew W, Agarwal, Vikram, Guan, Xueying, Ha, Misook, Ramachandran, Vanitharani, Chen, Xuemei, Triplett, Barbara A, Stelly, David M, and Chen, Z Jeffrey more...
- Abstract
Background Cotton fiber development undergoes rapid and dynamic changes in a single cell type, from fiber initiation, elongation, primary and secondary wall biosynthesis, to fiber maturation. Previous studies showed that cotton genes encoding putative MYB transcription factors and phytohormone responsive factors were induced during early stages of ovule and fiber development. Many of these factors are targets of microRNAs (miRNAs) that mediate target gene regulation by mRNA degradation or translational repression. Results Here we sequenced and analyzed over 4 million small RNAs derived from fiber and non-fiber tissues in cotton. The 24-nucleotide small interfering RNAs (siRNAs) were more abundant and highly enriched in ovules and fiber-bearing ovules relative to leaves. A total of 31 miRNA families, including 27 conserved, 4 novel miRNA families and a candidate-novel miRNA, were identified in at least one of the cotton tissues examined. Among 32 miRNA precursors representing 19 unique miRNA families identified, 7 were previously reported, and 25 new miRNA precursors were found in this study. Sequencing, miRNA microarray, and small RNA blot analyses showed a trend of repression of miRNAs, including novel miRNAs, during ovule and fiber development, which correlated with upregulation of several target genes tested. Moreover, 223 targets of cotton miRNAs were predicted from the expressed sequence tags derived from cotton tissues, including ovules and fibers. The cotton miRNAs examined triggered cleavage in the predicted sites of the putative cotton targets in ovules and fibers. Conclusions Enrichment of siRNAs in ovules and fibers suggests active small RNA metabolism and chromatin modifications during fiber development, whereas general repression of miRNAs in fibers correlates with upregulation of a dozen validated miRNA targets encoding transcription and phytohormone response factors, including the genes found to be highly expressed in cotton fibers. Rapid and more...
- Published
- 2009
6. A case study of selecting suppliers in China
- Author
-
Guan, Xueying, Wang, Shenning, Guan, Xueying, and Wang, Shenning
- Abstract
Based on current competitive market, supply chain becomes to be more and more important to overall corporate strategy. Finding good suppliers makes much more senses for the companies nowadays as purchasing is one of the basis parts on the upstream of the supply chain. China has been very successful on turning itself into a production powerhouse in just two decades, so how to find and select the convenient suppliers in China is a very important and modern topic. The thesis has been starting with the introduction part, where the importance of outsourcing, Chinese current manufacturing capabilities and some other factors will be introduced. Besides, the purpose of this thesis is to study and analysis the criteria and processes are used by PCH International on the selection of suppliers in China. The authors try to understand how foreign companies find the right Chinese suppliers based on a case studying, which is PCH International, an Irish company. Within the theoretical framework part, the authors discussed the supplier selection criteria firstly, which are very important and necessary to evaluate suppliers’ performances. Then the thesis was provided with an insight into some common theoretical methods, which followed by the supplier selection processes. Total Cost of Ownership, Data Envelopment Analysis and Mathematical Programming are presented in basic term. The part in the theoretical review was informed about the structure of the supplier selection process, starting with the preparation step, followed by prequalification and evaluation steps and resulting in the final selection of the suppliers. In the methodology part, the approach for the research will be presented, it will be divided into four parts, which are choice of topic, choice of method, data collection, research’s validity and reliability. The empirical finding part consists of practical information which was provided by the case company mentioned above through questionnaires and interviews. The value more...
- Published
- 2009
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