Table 7 . Tensiograms of serum obtained from healthy people of different age^a .

Sex	Age	Surface tension parameters b
		γ 1 (mNm -1 )	γ 2 (mNm -1 )	γ 3 (mNm -1 )
Males	>20	64-68	64-68	56-59
	20-35	68-72	65-69	57-60
	36-50	68-72	66-69	57-63
	≤50	68-74	66-71	57-66
Females	>20	66-70	65-69	58-61
	20-35	68-74	66-70	59-62
	36-50	70-74	67-70	59-65
	≤50	70-76	67-72	59-68

^a Data taken from reference 6.

^b γ₁ surface tension for t=0.01 s; γ₂ surface tension for t=1 s; γ₃ surface tension t→∞.