Chiral extractant plays a key role in chiral extraction,and considerable efforts have been undertaken for the development of new and efficient chiral extractants in recent years.This work demonstrated for the first ti...Chiral extractant plays a key role in chiral extraction,and considerable efforts have been undertaken for the development of new and efficient chiral extractants in recent years.This work demonstrated for the first time that chiral ferrocenyl diphosphine ligand(Mandyphos-Pd)had considerable ability to enantioseparate 3-Chlorophenylglycine enantiomers with separation factor(α)of 2.64.Mandyphos-Pd concentration and pH had significant influences on enantioselectivity,while operating temperature showed less influence.The extraction experiments can be performed at room temperature(20℃)which had the advantage of energy saving.After optimization,the highest performance factor(pf,0.08376)was obtained at the condition of pH 7.8 and Mandyphos-Pd concentration 1.2 mmol·L^(-1).According to the experimental results,the possible recognition mechanism was discussed.展开更多
This essay treats the understanding of poetry, especially lyric poetry, as representation. The theme is developed partly as a historical survey, from the Classical Age to Romanticism and to Modernism, and through the ...This essay treats the understanding of poetry, especially lyric poetry, as representation. The theme is developed partly as a historical survey, from the Classical Age to Romanticism and to Modernism, and through the history of aesthetics in Western terms. It offers critical scrutiny with the intention to explore a more justifiable theory of representation. Hopefully it may help to understand lyric poetry in historical contexts from Plato and Aristotle＇s imitation theories, to Beardsley＇s theory of illocutionary action and New Criticism. It is the image in lyric poetry that accounts for human action＇s being represented. Poetic beauty is an illusionary reality, as that in painting, and the role of image has been widely appreciated in producing this beauty as verbal icon. Finally, I mention the connection between Western theorizing of poetry as representation and Chinese poetry and poetics in general. We see the possibility that the importance of lyric poetry as representation can encourage comparative literature and world literature, and a general theory of representation. These might be informative in Chinese literary studies, from a theoretical point of view.展开更多
基金This work was financially supported by National Natural Science Foundation of China(Grant No.51703060)Hunan Provincial Innovation Foundation for Postgraduate(Grant No.CX2018B673).
文摘Chiral extractant plays a key role in chiral extraction,and considerable efforts have been undertaken for the development of new and efficient chiral extractants in recent years.This work demonstrated for the first time that chiral ferrocenyl diphosphine ligand(Mandyphos-Pd)had considerable ability to enantioseparate 3-Chlorophenylglycine enantiomers with separation factor(α)of 2.64.Mandyphos-Pd concentration and pH had significant influences on enantioselectivity,while operating temperature showed less influence.The extraction experiments can be performed at room temperature(20℃)which had the advantage of energy saving.After optimization,the highest performance factor(pf,0.08376)was obtained at the condition of pH 7.8 and Mandyphos-Pd concentration 1.2 mmol·L^(-1).According to the experimental results,the possible recognition mechanism was discussed.
文摘This essay treats the understanding of poetry, especially lyric poetry, as representation. The theme is developed partly as a historical survey, from the Classical Age to Romanticism and to Modernism, and through the history of aesthetics in Western terms. It offers critical scrutiny with the intention to explore a more justifiable theory of representation. Hopefully it may help to understand lyric poetry in historical contexts from Plato and Aristotle＇s imitation theories, to Beardsley＇s theory of illocutionary action and New Criticism. It is the image in lyric poetry that accounts for human action＇s being represented. Poetic beauty is an illusionary reality, as that in painting, and the role of image has been widely appreciated in producing this beauty as verbal icon. Finally, I mention the connection between Western theorizing of poetry as representation and Chinese poetry and poetics in general. We see the possibility that the importance of lyric poetry as representation can encourage comparative literature and world literature, and a general theory of representation. These might be informative in Chinese literary studies, from a theoretical point of view.
