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- 저자 : Yingquan Tan (검색결과 2 건)
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The mechanism of higher alcohol formation on ZrO2-based catalyst from syngas
Yingquan Wu,Hongjuan Xie,Yongli Kou,Noritatsu Tsubaki,Yizhuo Han,Yisheng Tan 한국화학공학회 2015 Korean Journal of Chemical Engineering Vol.32 No.3
A chain growth scheme for the synthesis of alcohols from carbon monoxide and hydrogen is proposedbased on the chemical enrichment method on ZrO2-based catalyst. Methanol addition has no obvious effect on theSTY of C2+ alcohols, indicating that COH→CCOH is a slow initial growth step. Addition of ethanol and propanols canenhance the STY of isobutanol, especially n-propanol, revealing that n-propanol is largely the precursor of isobutanol. Results of large alcohols addition further reveal the relationship between small alcohols and large alcohols of formation. Also, addition of aldehydes has a similar effect on the formation of higher alcohols, indicating that alcohols existin the form of aldehydes before desorption. Anisole are introduced into syngas for confirmation of predicted intermediatesand the result indicates that formyl species is participated both in the formation of methanol and higher alcohols. Reaction temperature has a significant effect on the chain growth of alcohols synthesis. Under low temperature,chain growth occurs with CO insertion and alcohols are linear products. Isobutanol appears and becomes the mainproduct during C2+ alcohols undergo an aldo-condensation reaction at high temperature.
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Yang Zhao,Xiaojian Peng,Wenbo Chai,Yingquan Tan,Qing Dong,Haiyang Jiang,Beijiu Cheng 한국유전학회 2017 Genes & Genomics Vol.39 No.1
Integrated networks of gene expression, hormonal signaling and metabolite sensing regulate phyllotaxy pattern development. In this study, we characterized differentially expressed genes (DEGs) between maize plants with alternate and opposite phyllotaxies. Gene ontology and Kyoto Encyclopedia of Genes and Genomes analyses showed that 2432 DEGs were involved in biological processes, molecular functions, cellular components and many pathways. Importantly, we identified 19 DEGs related to plant hormone signal transduction. Additionally, we identified four main alternative splicing types: skipped exons, retained introns, alternative 50-splice sites, and alternative 30-splice sites, which exhibited different characteristics in the alternate and opposite phyllotaxy libraries. The reliability of the sequencing data was verified through using quantitative real-time reverse transcription PCR analysis of the 19 genes: 15 were validated to play a role in phytohormone signal transduction pathways. Taken together, our data provide new insight into the mechanisms of phyllotaxy pattern development, and will increase our understanding of how relative changes in gene expression determine alternate/opposite phyllotaxy in maize.
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