WebApr 26, 2024 · 一、 实验原理和目的 . 根据朗伯—比尔定律,某有色溶液的吸光度A与其中溶质浓度C和液层厚度L成正比 。 叶绿素和类胡萝卜素在95%的乙醇提取液中的最大吸收峰波长不同, 叶绿素(95%乙醇)在665nm、649nm,类胡萝卜素在470nm有最大吸收峰,根据在分光光度计下测定的吸光度,求得叶绿素及类胡萝卜素的 ... WebThe number 7 is often considered lucky, and it has a definite mystique, perhaps because it is a prime number—that is, it cannot be obtained by multiplying two smaller numbers together. There are seven days of the week, named after various ancient gods and planets (Sun-day, Moon-day, Tiw’s-day, Woden’s-day, Thor’s-day, Frigg’s-day ...
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