Sentence:  Because negative pressure dialysis gave <WSD>better</WSD> recovery of proteins , permitted detection of proteins concentrated from very dilute solutions and was a gentler procedure , it was used in all but the earliest experiments . 
Meaning of the word marked with <WSD> tags:  (comparative of `good') superior to another (of the same class or set or kind) in excellence or quality or desirability or suitability; more highly skilled than another