The extraction of red pigment from red sweet pepper with methanol was reported. Effect of the PH value, heat and sunlight on the stability were researched in depth.

本文报道了采用甲醇从红甜椒中提取甜椒红色素的工艺，并对P H值、光、热等因素对其稳定性的影响，作了较深的研究。

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The availability of exogenous lanthanum and its effect on soil pH in red soil were studied.

通过培养试验及盆栽试验研究了外源镧在红壤中的有效性及其对土壤酸度的影响。

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