渗透势(osmotic potential)
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亦称溶质势( solute po-tential)。由于水溶液中有溶质的存在,降低了水的自由能,因而其水势低于纯水的水势,这种水势差即为该溶液的渗透势。因为纯水水势被定为零,所以渗透势为负值。某溶液的渗透势的绝对值与该溶液的渗透压的数值相等。
互联网
亦称溶质势( solute po-tential)。由于水溶液中有溶质的存在,降低了水的自由能,因而其水势低于纯水的水势,这种水势差即为该溶液的渗透势。因为纯水水势被定为零,所以渗透势为负值。某溶液的渗透势的绝对值与该溶液的渗透压的数值相等。
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