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xiaoqi5992

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1.        ????????????Lambert??beer????????????
A????lgT????b c
A??????????????????O.D????
T????????? T??I / I???? I???????????????????????I??????????????????
??????????????????????????????L???N???1?????1????
b???????????cm??????????1.0cm ????????b=1cm??
C???????????mol/L????
???????????????????A??????????????????????????????C?????????
2.        DNA??RNA??OD?
2.1        ???
????????????§Û???????????????????????????????240~290nm???????????????????ÈÉ??????????????????????DNA???¦Å???????????260nm?????????????????3-25??????230nm???????????????????absorbance????A260?????A260??????????????RNA???¦Å???????????DNA?????????????????280nm????????????ÈÉ?¦Ê?§³??????????230nm?????????????????????A260?????????¨²????????????????????§Ü????????????????????????????1??g??mL???????????260nm?????????????????????DNA???????????0.020??????DNA??RNA???????????0.022?????????????????????A??-lgT????bc???c??A/??b????b????1cm????????????1OD?????50??g??mL?????DNA????40??g??mL??????DNA????RNA??????20??g??mL??????????
2.2        ????
DNA??RNA?????????????260nm??230nm??280nm?????????????????????DNA OD260??280??1.8-1.9??OD260??230?????2.0??????RNA OD260??280??1.9-2.0?????DNA???????1.8-1.9????????RNA??????????????DNA???§³??1.8-1.9????????§Ù??????????RNA?§Ü??§Ù?????????????????????OD260??230§³??2.0????§Ó§Õ???¦Ë?§³?????????????
2.3        ???
DNA??RNA?????????????????????????A??-lgT????bc??????????????c??A/??b????????0.020????b??1cm????????c??A/??0.020??1????50??A????¦Ä?????????????50??A????????????g??mL????50??A????????/1000??mg??mL??
2.4        ???????
1)        ???????????????????????????????????
2)        ??????OD260??? 0.15 ??1.0?????????????
3)        ????????????????????????????????0.25ul??ml????????§³??0.25ul??ml?????????????
4)        ?????RNA????§Ö???????????????????1.8??????????????????????????????RNA?????????????????§Ö??????
5)        A260/A280???????DNA?????????¦Ï?????A260/A280 ???????pH??????¦Ä??pH?????????????????????????????????????10 mM Tris Cl, pH 8.5?§Þ???????????DNA A260/A280?????1.8-2.0???????????????????????????
6)        ????OD????????????????????????????????§Ö?OD???
7)        ??????220-330 nm ????????Ñk??????????????????????????OD260??????325 nm ????????????????????????????)
8)        DNA??????260 nm????????????OD??????????????????????1??OD?????DNA????????33 mg??
3Â¥2013-03-13 08:21:47
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xiaoqi5992

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wizardfan: ½ð±Ò+2, ËÑË÷ÒýÇæÊǸöºÃ¶«Î÷ 2013-03-13 08:38:25
TLC²ËÄñ: ½ð±Ò+5, ¡ïÓаïÖú 2013-03-17 21:04:56
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wizardfan

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TLC²ËÄñ: ½ð±Ò+1, ¡ïÓаïÖú, ÒÑÖªµÀÔõô»ØÊÂÁË£¬Ð»Ð» 2013-03-17 21:05:21
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wizardfan: ½ð±Ò+1, лл²ÎÓë 2013-03-14 08:27:34
TLC²ËÄñ: ½ð±Ò+2 2013-03-17 21:05:47
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