排序方式： 共有2条查询结果，搜索用时 15 毫秒
1
1.
In this paper,the low-temperature properties of the spin-1 two-dimensional frustrated Heisenberg antiferromagnet with the single-ion anisotropy are investigated on a square lattice by using the spin-wave theory.The influence of the frustration and anisotropy is found in the thermodynamics of the model,such as the temperature dependence of the staggered magnetization and specific heat.For some selected values of the frustration and anisotropy parameters,the results for the specific heat are compared with those of existing theories and numerical estimates.Within a spin-wave analysis,we have found the evidence for an intermediate magnetically disorder phase to separate the N′eel and collinear phases. 相似文献
2.
利用顶空固相微萃取/气相色谱/质谱(HS/SPME/GC/MS)联用技术对凤丹白和凤丹粉两种鲜花的挥发性成分进行研究,比较分析两种凤丹鲜花挥发性成分.两种凤丹鲜花中共检测出50种挥发性成分,其共有的挥发性成分有27种.在凤丹白鲜花中检测出41种挥发性成分,占挥发性总成分的89.00％,主要为碳氢类、醛类、醚类、醇类、酚类和酯类化合物,分别占挥发性总成分的55.78％、21.15％、9.22％、2.32％、0.27％和0.26％;在凤丹粉鲜花中检测出36种挥发性成分,占挥发性总成分的89.00％,主要为碳氢类、醚类、醇类、醛类、酯类和酚类化合物,分别占挥发性总成分的78.76％、4.07％、2.72％、2.70％、0.42％和0.33％.两种凤丹鲜花挥发性成分及含量差异比较显著,差异性成分主要表现为:凤丹白含有(R)-3,7-二甲基-6-辛烯醛、壬醛、正己醛、2,2,4,6,6-五甲基-庚烷等,而凤丹粉含有6,9-十七烷二烯. 相似文献
1