Morphologic and cytological characteristics of hybrid F1 between E. canadensis and E. sibidcus were studied. The results showed that hybrid F1 were obviously exceeded parents in plant growth vigor, and spike type of F...Morphologic and cytological characteristics of hybrid F1 between E. canadensis and E. sibidcus were studied. The results showed that hybrid F1 were obviously exceeded parents in plant growth vigor, and spike type of F1 was between parents. The karyotype formula of hybrid F1 which was true hybrid was 2n =4x=16M ＋ 10m ＋2st. At meiotic anaphase, chromosome lagging behaviors were frequently observed. The frequency of lagging chromosomes of F1 was 87.37%. At meiotic metaphase, there were many univalents and multivalents, and the rod bivalent formed greatly.展开更多
The aim of this study was to determine the volatile composition of essential oil of four Picea Mill. species （Piceapungens Engelm., Picea mariana （Mill.） Britton, Picea glauca （Moench） Voss., Picea rubens Sarg.）...The aim of this study was to determine the volatile composition of essential oil of four Picea Mill. species （Piceapungens Engelm., Picea mariana （Mill.） Britton, Picea glauca （Moench） Voss., Picea rubens Sarg.） needles. The volatile components extracted from these four species needles were analyzed by using headspace solid phase microextraction （HS-SPME）/gas chromatography-mass spectrum （GC-MS） and 31, 34, 27 and 24 compounds were identified representing 91.77%, 92.70% 92.38% and 94.06% of the total oil, respectively. The major constituents were found to be bornylacetate （29.40%）, camphor （26.43%）, 13-myrcene （7.47%） and camphene （7.01%） in P. pungens; camphene （22.03%）, bornylacetate （21.64%）, α-pinene （16.62%） and borneol （7.79%） in P. mariana; bornylacetate （31.25%）, limonene （17.27%）, α-pinene （15.85%）; camphene （13.65%） in P. glauca and borneol （12.38%）, α-pinene （10.36%）, germacrene D （9.86%） and δ-cadinene （8.25%） in P. rubens. This study sought to detecte new phytochemical data on the Picea genus to help chemotaxonomy and usable of studied species.展开更多
The tradition of the west defines its modernity as a radical rupture with endless possibilities for egalitarian futures; yet western modernity was rooted in the genocide of indigenous populations, transatlantic racial...The tradition of the west defines its modernity as a radical rupture with endless possibilities for egalitarian futures; yet western modernity was rooted in the genocide of indigenous populations, transatlantic racial slavery and colonialism. Moreover, as the war on terror demonstrates, racial/gender violence continues to be linked to the formation of western identity, culture and politics in the early twenty-first century. This paper examines how the histories of race and coloniality feature in the contemporary formation of the west, with a particular focus on US nationalism and Canadian multiculturalism. These nation-states are most often defined as antithetical, with the latter confirming that western society has transcended its originary racial/colonial politics. I begin with a brief discussion of the reformation of the west in the mid-twentieth century as the USA became the dominant western power. I then move to compare the contemporary national politics of the USA and Canada to highlight the divergence and convergence in their ddineation of their identity and values. My study demonstrates that although the white supremacist discourse that presently constitutes US nationalism is at variance with the multi- culturalism that shapes Canadian identity, these discourses can be defined as twin aspects of the racial/colonial politics that continue to give meaning to the idea of the west.展开更多
基金Supported by Research on Distant Hybridization Breeding of Forage(2008BADB3B02)in the Eleventh Five-year Plan Periodthe Major Scientific and Technical Project of Inner Mongolia Autonomous Region,"Products Development of High Quality Adequet Grass"~~
文摘Morphologic and cytological characteristics of hybrid F1 between E. canadensis and E. sibidcus were studied. The results showed that hybrid F1 were obviously exceeded parents in plant growth vigor, and spike type of F1 was between parents. The karyotype formula of hybrid F1 which was true hybrid was 2n =4x=16M ＋ 10m ＋2st. At meiotic anaphase, chromosome lagging behaviors were frequently observed. The frequency of lagging chromosomes of F1 was 87.37%. At meiotic metaphase, there were many univalents and multivalents, and the rod bivalent formed greatly.
文摘The aim of this study was to determine the volatile composition of essential oil of four Picea Mill. species （Piceapungens Engelm., Picea mariana （Mill.） Britton, Picea glauca （Moench） Voss., Picea rubens Sarg.） needles. The volatile components extracted from these four species needles were analyzed by using headspace solid phase microextraction （HS-SPME）/gas chromatography-mass spectrum （GC-MS） and 31, 34, 27 and 24 compounds were identified representing 91.77%, 92.70% 92.38% and 94.06% of the total oil, respectively. The major constituents were found to be bornylacetate （29.40%）, camphor （26.43%）, 13-myrcene （7.47%） and camphene （7.01%） in P. pungens; camphene （22.03%）, bornylacetate （21.64%）, α-pinene （16.62%） and borneol （7.79%） in P. mariana; bornylacetate （31.25%）, limonene （17.27%）, α-pinene （15.85%）; camphene （13.65%） in P. glauca and borneol （12.38%）, α-pinene （10.36%）, germacrene D （9.86%） and δ-cadinene （8.25%） in P. rubens. This study sought to detecte new phytochemical data on the Picea genus to help chemotaxonomy and usable of studied species.
文摘The tradition of the west defines its modernity as a radical rupture with endless possibilities for egalitarian futures; yet western modernity was rooted in the genocide of indigenous populations, transatlantic racial slavery and colonialism. Moreover, as the war on terror demonstrates, racial/gender violence continues to be linked to the formation of western identity, culture and politics in the early twenty-first century. This paper examines how the histories of race and coloniality feature in the contemporary formation of the west, with a particular focus on US nationalism and Canadian multiculturalism. These nation-states are most often defined as antithetical, with the latter confirming that western society has transcended its originary racial/colonial politics. I begin with a brief discussion of the reformation of the west in the mid-twentieth century as the USA became the dominant western power. I then move to compare the contemporary national politics of the USA and Canada to highlight the divergence and convergence in their ddineation of their identity and values. My study demonstrates that although the white supremacist discourse that presently constitutes US nationalism is at variance with the multi- culturalism that shapes Canadian identity, these discourses can be defined as twin aspects of the racial/colonial politics that continue to give meaning to the idea of the west.
