极性

Methods 9 kinds of macroporous resins with different polarities were used in the purification of the total flavonoids in Lignum Dalbergia odorifera.Results HPD?

选择9种不同极性的大孔吸附树脂，以降香总黄酮为指标，通过静态吸附和解吸附试验优选树脂，动态试验考察其纯化降香总黄酮的最佳工艺条件。

Temperature dependence of the effective mass of the strong coupling magnetopolaron in polar crystals are studied by means of an improved linear combination operator method.

采用改进的线性组合算符法研究极性晶体中强耦合磁极化子的有效质量与温度的关系。

Just pay attention to that the gains for plus and minus signals are the same, and the area of the signal around zero. I checked the LM35, the accuracy is good, but does it need 2 diodes in series to measure the temperature lower than -20 degree C? You could consider TC1047A that I used before, it doesn't need any other component, and it can go directly to A/D.

我用4051是想将AD620的＋/-输出信号不通过绝对值电路，而是接一个反相电路，反相前后的信号通过4051和极性判断电路有选择的将信号的绝对值电压再送入AD，用这个方法也能处理温度传感器LM35的输出信号，我想这是个比较安全的方法了吧！

The chemical constituents of Huperzia serrata Trev. are mainly flavonoids, triterpenoids and alkaloids. In order to get further comprehension of lycopodium alkaloids, we studied the low-polar section of the alkaloids extraction of Huperzia serrata and 19 alkaloids were isolated by ways of silica gel, RP-18 and Sephadex LH-20 etc. All of their structures, including five new compounds and two known ones that were firstly found from this genus, were elucidated with the help of Mass, IR, NMR spectra and so on. The five new alkaloids (HS-07, HS-08, HS-09, HS-10 and HS-11) are belonged to lycopodine class. The other two ones that were new to this genus (HS-18 and HS-19) are belonged to miscellaneous group.

蛇足石杉的主要化学成分为黄酮，三萜和生物碱，为进一步了解该植物的生物碱成分，我们研究了蛇足石杉氯仿总碱低极性部位的生物碱成分，运用正相硅胶、反相RP-18、凝胶LH-20等方法分得了19个生物碱，并通过质谱、红外、核磁共振等波谱鉴定了它们的结构，其中5个为新化合物，2个为首次从该属植物中分离得到的化合物，所分得的新化合物：HS-07、HS-08、HS-09、HS-10和HS-11均为lycopodine类石松生物碱，首次从该属植物中分得的化合物为miscellaneous类：HS-18和HS-19。

Magnetic storage technology works is by changing the polarity of the magnetic particles in the magnetic media to record data.

磁存储技术的工作原理是通过改变磁粒子的极性来在磁性介质上记录数据。

When the vehicles move, this kind of electro-magnet magnetic field cutting track both sides installment aluminum link, cause in which produces the induced current, simultaneously has a like polarity counter magnetic field, and causes the vehicles to push airborne to the top of rail in aerosol.

车辆运行时，这种电磁铁的磁场切割轨道两侧安装的铝环，致使其中产生感应电流，同时产生一个同极性反磁场，并使车辆推离轨面在空中悬浮起来。

To improve accuracy of detection of current direction, components of magnetizing current and torque current are transformed into two-phase stationary frame. Therefore compensating voltage vector can be decided according to the sector the current vector is locating.

为了提高电流极性检测的准确性，利用旋转轴系中的励磁电流和转矩电流分量经过坐标反变换，判断电流在两相静止轴系所处的扇区来决定需要施加的补偿电压。

This markedness theory has pragmatic, cognitive, and biological foundations and is thus functional in nature.

第六章阐述"极性词"（只能用于肯定句或只能用于否定句的词）形成的原因跟语用原则和认知规律有关。

The reaction with heterolytic mechanism is retarded severely in supercritical water, so do the hydrolysis of methyl acetate.

近临界水极性的巨大变化，使得异裂机理类型的醋酸甲酯水解在超临界水中反应速率反而大幅下降，实验数据显示，水解反应温度不宜超过水的临界点。

This paper deals with the design and development of bipolar Ni/MH batteries.

本文报道了双极性MH/Ni电池的设计与开发。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。