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gzsjls
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bijifu
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luckydogzhang
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nilei1201
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ifand163
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luckydogzhang(½ð±Ò+6,VIP+0):ºÃ¾Ã²»¼û°¡ 7-13 08:17
luckydogzhang(½ð±Ò+6,VIP+0):ºÃ¾Ã²»¼û°¡ 7-13 08:17
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Poly(N-isopropylacrylamide) (variously abbreviated PNIPA, PNIPAAm, PNIPAA or PNIPAm) is a temperature-responsive polymer that was first synthesized in the 1950s.[1] It forms a three-dimensional hydrogel when crosslinked with N,N¡¯-methylene-bis-acrylamide (MBAm) or N,N¡¯-cystamine-bis-acrylamide (CBAm). When heated in water above 33¡ãC, it undergoes a reversible phase transition from a swollen hydrated state to a shrunken dehydrated state, losing about 90% of its mass. Since PNIPAm expels its liquid contents at a temperature near that of the human body, PNIPAm has been investigated by many researchers for possible applications in controlled drug delivery.[2][3] ºÇºÇ£¬Ó¢ÎIJ»ÊǺܺã¬ÊDz»ÊÇ˵Ã÷²£Á§»¯×ª±äζÈΪ33¡æ°¡£¿´Óά»ù°Ù¿ÆÉÏÕÒµ½µÄ£¬²»ÖªµÀ¶Ô²»¶ÔŶ^_^ https://en.wikipedia.org/wiki/Poly(N-isopropylacrylamide) ![]() ![]() |
8Â¥2009-07-12 14:49:27
luckydogzhang
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9Â¥2009-07-13 08:16:44
10Â¥2010-04-25 22:26:58













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