The chiral chromatographic fixed phase stuffing of vancomycin phenylisocyanate after assembled to column may be used in forward phase, reverse phase and polar organic phase chromatographic condition.

用这种方法合成的万古霉素苯异氰酸酯手性色谱固定相填料装柱 后，可以在正相、反相及极性有机相色谱条件下使用。

youdao

Aluminum electrolytic capacitors are polar. Make sure that no reverse voltage or ac voltage is applied to the capacitors.

铝电解电容器是有极性的，不应加反向电压或交流电压。

youdao

Starch is a commonly used hematite depressor in reverse flotation of hematite and dissolved waste Saccharomyces Cerevisiae contains a polar group similar to starch.

淀粉是赤铁矿反浮选工艺中常用的赤铁矿抑制剂，而废啤酒酵母溶解相中含有与淀粉中相似的极性基团。

youdao

Even as she professed her affection for them, Palin had, in early August, filed suit against Dirk Kempthorne, the United States Secretary of the Interior, seeking to reverse his decision to list the polar bear as a threatened species under the Endangered Species Act.

NEWYORKER: The State of Sarah Palin