1) 2-trees
2-树
1.
By using the concept of Perron vector,this paper characterized the extremal graphs of all 2-trees with n vertices(n fixed)which have the second and the third largest spectral radius,respectively.
利用Perron向量的概念,分别刻画出谱半径达到第二大和第三大的n阶2-树。
2) XAD-2 resin
XAD-2树脂
1.
In order to investigate passive air sampler's feasibility and assess its basic performance and application features,XAD-2 resin based passive air samplers were used to collect air samples for five months in Beijing and six months in Wolong Nature Reserve,Sichuan Province.
为了研究大气被动采样技术的可行性,评价其技术性能、特色和应用价值,采用以XAD-2树脂为吸附介质的被动采样器,对北京市和四川卧龙自然保护区大气中的典型持久性有机氯污染物分别进行了为期5个月和半年的样品采集,利用气相色谱-高分辨质谱方法对HCB,HCHs,DDTs和PCBs等进行了测定。
2.
A method for determination of microcystins in freshwater by XAD-2 resin concentration-HPLC was established.
建立了XAD-2树脂富集-高效液相色谱(HPLC)检测淡水水体中痕量微囊藻毒素(MCs)的方法。
3.
The results showed that XAD-2 was the best resin for refining isoflavones of chickpea,then the adsorption kinetics and thermodynamics of XAD-2 resin for chickpea isoflavones were studied.
粗提液用6种大孔吸附树脂精制,精制效果表明XAD-2树脂的精制效果最好,并研究了XAD-2树脂的吸附动力学及吸附热力学。
3) HD-2 resin
HD-2树脂
1.
The adsorption behavior and mechanism of HD-2 resin for Dy~(3+)is investigated.
研究了镝离子在HD-2树脂上的吸附行为。
4) D201 2# resin
D201~(2＃)树脂
5) 2-3tree
2-3树
6) 2-3-4 tree
2-3-4树
补充资料：(S)-10-羟基喜树碱
分子式：C20H16N2O5
分子量：364.35
CAS号：19685-09-7
性质：密度1.60。熔点265-270°C。
分子量：364.35
CAS号：19685-09-7
性质：密度1.60。熔点265-270°C。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条