In order to elucidate the phylogenetic relationship of fish, DNA and deduced amino acid sequences of myoglobin （Mb） were used for the phylogenetic analyses based on different approaches, namely, maximum likelihood ...In order to elucidate the phylogenetic relationship of fish, DNA and deduced amino acid sequences of myoglobin （Mb） were used for the phylogenetic analyses based on different approaches, namely, maximum likelihood （ML）, neighbor joining （NJ）, unweighted pair group method with arithmetic means （UPGMA） and maximum parsimony （MP） methods in comparison with the conventional molecular markers, mitochondrial cytochrome b （cyt-b） and cytochrome c oxidase subunit I （COI）. The phylogenetic trees drawn based on Mb sequences were similar to those by the traditional classification based on the other molecular markers. The primary and secondary structures, as well as the modeled tertiary structures of Mbs were similar to each other, but were clearly distinguishable among those species. Such differences in structure would be associated with adaptation of Mb molecule to the physiological conditions of each species. These results suggest that Mb can be a molecular marker for the phylogenetic relationship of fish.展开更多
Toni Morrison＇s fiction may arguably be characterized as postmodern discourse on memory, history and culture. In her novels, the Nobel laureate frequently returns to the past to search for answers to the questions sh...Toni Morrison＇s fiction may arguably be characterized as postmodern discourse on memory, history and culture. In her novels, the Nobel laureate frequently returns to the past to search for answers to the questions she poses about African American realities in the contemporary United States. In doing so, Morrison often creates alternative histories or, more specifically, a usable past----one that allows her to engage in a literary （re-）construction of the Black historical and cultural material which traditional histories have chosen to ignore or disremember. Therefore, as a present-day writer of African American descent, Morrison attempts to reassemble all the fragmentary historical and cultural accounts available to her as a novelist and narrate them in the form of a convincing story. With regard to the above considerations, this article seeks to discuss some of the mechanisms employed by Morrison for weaving her postmodern, memory-filled narrative on the example of her eighth novel, Love （2003）. In particular, the analysis focuses on the book＇s central figure, Bill Cosey, and his Southern ocean-side resort--both seen against the backdrop of the pre- and post-World War II racist America, followed by the 1960s decade of the Civil Rights Movement. Finally, it is also demonstrated how the author＇s use of split narrative as well as the ＂I＂ narrator-cum-character technique contribute to recounting in retrospect Love＇s main, historicized story---one viewed and judged from a present-time perspective.展开更多
文摘In order to elucidate the phylogenetic relationship of fish, DNA and deduced amino acid sequences of myoglobin （Mb） were used for the phylogenetic analyses based on different approaches, namely, maximum likelihood （ML）, neighbor joining （NJ）, unweighted pair group method with arithmetic means （UPGMA） and maximum parsimony （MP） methods in comparison with the conventional molecular markers, mitochondrial cytochrome b （cyt-b） and cytochrome c oxidase subunit I （COI）. The phylogenetic trees drawn based on Mb sequences were similar to those by the traditional classification based on the other molecular markers. The primary and secondary structures, as well as the modeled tertiary structures of Mbs were similar to each other, but were clearly distinguishable among those species. Such differences in structure would be associated with adaptation of Mb molecule to the physiological conditions of each species. These results suggest that Mb can be a molecular marker for the phylogenetic relationship of fish.
文摘Toni Morrison＇s fiction may arguably be characterized as postmodern discourse on memory, history and culture. In her novels, the Nobel laureate frequently returns to the past to search for answers to the questions she poses about African American realities in the contemporary United States. In doing so, Morrison often creates alternative histories or, more specifically, a usable past----one that allows her to engage in a literary （re-）construction of the Black historical and cultural material which traditional histories have chosen to ignore or disremember. Therefore, as a present-day writer of African American descent, Morrison attempts to reassemble all the fragmentary historical and cultural accounts available to her as a novelist and narrate them in the form of a convincing story. With regard to the above considerations, this article seeks to discuss some of the mechanisms employed by Morrison for weaving her postmodern, memory-filled narrative on the example of her eighth novel, Love （2003）. In particular, the analysis focuses on the book＇s central figure, Bill Cosey, and his Southern ocean-side resort--both seen against the backdrop of the pre- and post-World War II racist America, followed by the 1960s decade of the Civil Rights Movement. Finally, it is also demonstrated how the author＇s use of split narrative as well as the ＂I＂ narrator-cum-character technique contribute to recounting in retrospect Love＇s main, historicized story---one viewed and judged from a present-time perspective.
