Objective:to establish the assay method to detect the cholalic acid in bilis bovina by HPLC to establish the base to institute drug standard of processing drugs adjuvant bilis bovina.

目的：建立牛胆汁中胆酸HPLC含量测定的方法，为制定中药炮制辅料牛胆汁的药用标准打下基础。

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Defending champion Clijsters, 21, last played in early October when she retired in the second set of a match against Russia's Elena Bovina.

BBC: SPORT | Tennis | Clijsters marks comeback with win

Russia's Maria Kirilenko beat eighth-seeded compatriot Elena Bovina 6-3 6-1.

BBC: SPORT | Tennis | Clijsters eases into third round

In the remaining first-round matches, seventh seed Elena Bovina of Russia beat Jana Nejedly of Canada while eighth seed Meilen Tu fought back to defeat Brie Rippner 2-6 7-6 6-1.

BBC: Farina Elia into quarters