Sentence:  For the <WSD>albumin</WSD> method , equal volumes of 30 % bovine albumin , sample and 2 % cells suspended in saline were allowed to stand at room temperature for 1 hr and then were centrifuged at 1000 rpm for 1 min . 
Meaning of the word marked with <WSD> tags:  a simple water-soluble protein found in many animal tissues and liquids