样品

In this paper, using bupleurum as an example, a method of obtaining chromatograms of volatile oil in crude drugs by using gas chromatography and converting the data to retention index and percentage area in order to get the fingerprint of each sample was presented.

本文以生药柴胡为例，介绍了以气相色谱法获得含挥发油生药的气相色谱数据，并换算成保留指数和归一化峰面积，得到每一个样品的指纹图，将未知样品与标准样品的指纹图相比较，从而鉴别未知样品的方法。

With the increasing of NiFe_(2)O_(4) contents, the resistivity of composite samples Nd_(0.67)Sr_(0.33)MnO_(3)/niFe_(2)O_(4) is 1073K.

值得注意的是，在这一温区中，这种复合样品的磁电阻是负的，即给样品加磁场后，样品的电阻率反而增大，与纯Nd067sro33MnO3样品的磁电阻性能恰好相反，其机制有待进一步研究； 4。

The microstructures and second phases were examined by transmission electron microscopy.It is found that the specimen treated by 500 ℃/100 h has the best corrosion resistance among all the specimens.TEM analysis of the specimens tempered at 500 ℃ with different time shows that the second phase changes from the seriate strips to the banding...

用透射电镜研究了这些样品的显微组织和第二相，观测到随着保温时间延长，500℃下保温样品中的第二相由连续片层逐渐转变成带状分布的颗粒，保温时间达到100 h时，基体内析出βNb.560℃下保温样品与500℃下保温样品有相似的组织转变过程，只是时间大幅缩短，保温仅10 h时，基体已完全再结晶为等轴晶。

The latter has only one PL band peaking at about 1.48eV,while the former is a double-band PL spectrum with peaks at both 1.48eV and 1.97eV.The electroluminescenceform the Au／scored Si-rich SiO2 film／p-Si sample is about 6 times in intensity of that of the Au／unscored one.

未刻划样品的PL谱只有一个峰，位于840nm(1.48eV)，而刻划样品的PL谱是双峰结构，峰位分别位于630nm(1.97eV)和840nm.800℃退火的刻划富硅二氧化硅/p-Si样品在背面蒸铝制成欧姆接触和正面蒸上半透明金电极后在正向偏压10V下的电致发光强度约为同样制备的未经刻划样品在同样测试条件下的EL强度的6倍。

To the materials , there are rare dislocations in their crystal grains; to the unstrengthened samples, there are many dislocations which well-distributed in their grains; and to the strengthened samples, there are a large amount of dislocations scattered along their grain-boundaries, that is, the dislocations form a dislocation wall which is of great dislocation density.

又经透射电子显微镜对各种样品微观组织结构进行分析，发现其位错组态明显不同：①原材料样品中的晶粒内仅存在有非常稀疏的位错线；②未经过强化的样品中可观察到大量均匀分布的位错，分布密度相对较高；③在经过低载锻炼强化的样品中，可观察到大量的晶粒内在晶界附近聚集着一道密度很高的位错墙。

After purification, PCR products of 768 clones were printed on silanized glass slides automatically using arraying system.

该方法通过将连有不同接头的两种待检样品cDNA分别与过量的对照样品cDNA进行杂交后，合并继续进行第二轮杂交，并且在杂交后利用对应于接头的特异性引物进行两轮抑制性PCR，扩增的产物通常便是同对照样品相比待检样品中差异表达的基因。

For Method Ⅰ, the residues were extracted from homogenized tissue with acetone-ethylacetate-n-hexane (1∶1∶1, v/v/v), and then were redissolved in acetonitrile; for Method Ⅱ, the residues were extracted from homogenized tissue with acetonitrile-water under ultrasonication, and then were separated by liquid-liquid partition.

在样品前处理方法Ⅰ中，样品经丙酮-乙酸乙酯-正己烷(体积比为1∶1∶1)混合溶剂提取，乙腈转溶；在样品前处理方法Ⅱ中，样品用乙腈-水溶液均质，超声波辅助提取，液-液分配。

In this paper,the natural apple essence samples known only for the production date were identified by using electronic nose.

本文利用电子鼻检测仅知生产日期的天然苹果香精样品，并对所获数据进行PCA及DFA分析，结果表明：生产日期与产品质量有着密切的联系，其中牟平总公司样品以2004年10月31日为界分为两大组群，白水分公司2005年的样品明显区别于2004年的样品。

The origins of disturbed signals were analyzed for different earthed-conditions between PZT and sample. It is best to ensure that the upper surfaces of PZT and sample have independent earth wire respectively, and for semiconductors, an insulation glue between the PZT and sample was chosen.

在结构设计合理的探测器组件基础上，分析了探测器材料和样品在不同的接地状态下干扰信号的产生原因，指出了样品与探测器的上表面最好同时接不同的地线，而对半导体类样品，样品与探测器之间最好采用电绝缘的耦合剂。

The observed EMF values of oxygen concentration cell coincided withtheoretical values perfectly, indicating that the ceramics were purely oxide-ionicconductors with oxygen ion transference number of 1 under oxygen atmosphere over thewhole temperature range. The electrochemical oxygen permeation rates determined were inaccordance with the theoretical rates calculated from Faradays law, verifying directexperimentally that the oxide-ionic nature of the conduction under oxygen atmosphere. Athigh oxygen partialpressure range pO_2=10~(-5～10~5 Pa, they were almost pure ionicconductors, which was consistent with the result by means of oxygen concentration cell.Whereas at low oxygen partial pressure range pO_2=10~(-5～10~(-15)Pa, the samplesexhibited mixed ionic and electronic conduction.

结果表明，氧浓差电池电动势的实测值与理论值吻合得很好，氧离子迁移数为1，表明该系列样品在该温度下氧气气氛中为纯氧离子导体；氧泵实验结果进一步证实了该系列样品在氧气气氛中为纯氧离子导体；在氧分压pO_2=10~(-5)～10~5 Pa的高氧分压气氛中，电导率与氧分压变化基本无关，表明在该氧分压范围样品为纯离子导体，这与氧浓差电池电动势测定结果相吻合：在低氧分压为10~(-5)～10~(-15) Pa范围，总电导率随氧分压降低而稍有升高，表明在该氧分压范围样品为氧离子与电子的混合导体。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。