id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
cet-2768		cet-2768		6	.pdf	application/pdf	3392	150	51	Figure 3: Foam (a) without Betaines; (b) with Betaines Figure 4: (a) Foam collapse completely at about 5 minutes for PEGB; and foam height at 60 minutes for (b) PEGDME and (c) LS Figure 5: Foam height versus time with different polymeric surfactant 3.4 Effects of crude oil on foam stability This section aims to examine the destruction mechanism on AOS-stabilized foam when oil is present. The effects of different types of crude oil on foam stability were also analyzed.	cache/cet-2768.pdf	txt/cet-2768.txt