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41.
Gui-xiao LA Ping FANG Yi-bo TENG Ya-juan LI Xian-yong LIN 《Journal of Zhejiang University. Science. B》2009,10(6)
The effects of CO2 enrichment on the growth and glucosinolate (GS) concentrations in the bolting stem of Chinese kale (Brassioa alboglabra L.) treated with three nitrogen (N) concentrations (5, 10, and 20 mmol/L) were investigated. Height,stem thickness, and dry weights of the total aerial parts, bolting stems, and roots, as well as the root to shoot ratio, significantly increased as CO2 concentration was elevated from 350 to 800 μl/L at each N concentration. In the edible part of the bolting stem,11 individual GSs were identified, including 7 aliphatic and 4 indolyl GSs. GS concentration was affected by the elevated CO2 concentration, N concentration, and CO2×N interaction. At 5 and 10 mmol N/L, the concentrations of aliphatic GSs and total GSs significantly increased, whereas those of indolyl GSs were not affected, by elevated atmospheric CO2. However, at 20 mmol N/L,elevated CO2 had no significant effects on the concentrations of total GSs and total indolyl GSs, but the concentrations of total aliphatic GSs significantly increased. Moreover, the bolting stem carbon (C) content increased, whereas the N and sulfur (S) contents decreased under elevated CO2 concentration in the three N treatments, resulting in changes in the C/N and N/S ratios.Also the C/N ratio is not a reliable predictor of change of GS concentration, while the changes in N and S contents and the N/S ratio at the elevated CO2 concentration may influence the GS concentration in Chinese kale bolting stems. The results demonstrate that high nitrogen supply is beneficial for the growth of Chinese kale, but not for the GS concentration in bolting stems, under elevated CO2 condition. 相似文献
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尼采用“重估一切价值”打倒一切偶像,对西方文化的基础进行彻底的反思,颠覆了传统道德、宗教、理性所设置的二元世界,把人从虚幻的外在世界拉回到本真的生命世界。其不乏深刻的见解,对当今生活在急剧变化的多样世界、却日益丧失精神家因的人们,无疑有积极意义。 相似文献
43.
针对目前高等师范教育中"现代教育技术"公共课的现状进行调查分析,指出了存在的一些不足之处,并提出了"现代教育技术"课程改革的一些建议. 相似文献
44.
PREDRAG LAŽETIĆ 《European Journal of Education》2010,45(4):549-562
This article analyses the work of the Bologna Follow Up Group as the main institution of the Bologna Process and the perceptions of the policy actors involved concerning the character of the process in terms of its functioning in contrast to similar multi-level multi-actor European processes, its modes of communication and consensus seeking, as well as its effectiveness in terms of policy formation and implementation. It argues that the Bologna Process is a unique multi-level multi-actor process shaped by its informality, the actors' political commitment and the participation of stakeholders. Its format seems to be more effective and suitable for purposes of policy formation than for those of policy monitoring or coordination of implementation. 相似文献
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