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超速离心提取了正常人低密度脂蛋白（ＬＤＬ，密度１．０２５－１．０５０ｇ／ｍＬ），再运用密度梯度离心将ＬＤＬ分成不同亚组分，观察它们的组成和抗氧化性。结果表明密度越高的亚组分，电泳迁移率越快。甘油三酯（ＴＧ）／胆固醇（ＣＨ）比值越低。通过观察体外Ｃｕ２氧化ＬＤＬ不同亚组分裂化产物２３４ｎｍ处吸光度的变化（氧化曲线），示ＴＧ／ＣＨ比值越高的亚组分抗氧化修饰的能力越低，氧化曲线中表现为延迟时间缩短。实验中在氧化体系中加入刺梨汁。能明显延长延迟时间，起到抗氧化作用，提示刺梨汁中有关成份对动脉粥样硬化（Ａｓ）的防治有一定价值。
Ultracentrifugal extraction of normal human low density lipoprotein (LDL, density 1.025-1.050g / mL), and then use density gradient centrifugation LDL divided into different sub-components, to observe their composition and anti-oxidation. The results showed that the higher the density of sub-components, electrophoretic mobility faster. The lower the triglyceride (TG) / cholesterol (CH) ratio. By observing the change of absorbance at 234 nm (oxidation curve) of different sub-component products of Cu2 oxidation LDL in vitro, the lower the antioxidant capacity of the sub-components with higher TG / CH ratio, the shorter the oxidation delay. Experiment in the oxidation system by adding Rosa juice. Can significantly extend the delay time, play an antioxidant role, suggesting that the relevant components of Cili juice of atherosclerosis (As) prevention and treatment have some value.