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2018-12-03 16:06發(fā)布了問答
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. [判斷題] 作為脂類,膽固醇、甘油三酯都是不溶于水的小分子。()a對(duì)b錯(cuò)
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2018-12-03 13:53發(fā)布了問答
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什么是PDE5YZ劑?
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2018-11-26 00:03發(fā)布了問答
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甲型H1N1流感的ZL
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2018-11-22 04:42發(fā)布了問答
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哪里有賣添加了脲酶YZ劑或者硝化YZ劑的氮肥?
- 麻煩提供公司名稱、聯(lián)系方式
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2018-11-20 23:46發(fā)布了問答
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Z近頭屑多了.用了氨基酸洗發(fā)水感覺沒什么用,偉大的
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2018-11-20 23:44發(fā)布了問答
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肽面膜和平常用的面膜有什么區(qū)別
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2018-11-13 11:35發(fā)布了問答
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組蛋白去乙?;竃Z劑的介紹
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2018-11-12 17:35發(fā)布了問答
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物理和生物化學(xué):發(fā)光現(xiàn)象的計(jì)算
- 1.A chromophore solution is places in a 1 × 1 cm regular fluorescence cuvette. The absorbance of this solution, at 1 cm path length, is 0.80 at 450 nm and 0.30 at 530 nm. When the sample is excited at 450 nm and the fluorescence emission... 1.A chromophore solution is places in a 1 × 1 cm regular fluorescence cuvette. The absorbance of this
solution, at 1 cm path length, is 0.80 at 450 nm and 0.30 at 530 nm. When the sample is excited at 450
nm and the fluorescence emission is measured at 530 nm (both were set at a very narrow 5 nm slit for
spectral band width), the observed fluorescence emission is 100 arbitrary unit. Calculate the theoretical
fluorescence emission intensity (using the same arbitrary unit) after corrections for the inner filter effects
on both excitation and emission. Show critical steps of calculation.
2.
For a particular Donor:Acceptor pair, the spectral overlap integral “J” between the corrected donor
fluorescence emission and the acceptor absorption is
1.58 x10-13 (cm3 M-1) and the efficiency of
fluorescence energy transfer is 0.667. Assuming 2/3 for the dipole orientation factor κ2 and 1.4 for therefractive index “n” of the medium, calculate the value of R. Show critical steps of calculation. 展開
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2018-11-12 04:39發(fā)布了問答
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維生素c有什么作用?
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2018-05-01 22:16發(fā)布了問答
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丙酮酸鈉的摩爾質(zhì)量是多少?
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2018-04-11 02:38發(fā)布了問答
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氨基酸分解
- 氨基酸分解尿液中的尿素來(lái)自于氨基酸的氨基,不是人體在萬(wàn)不得已的情況下才分解氨基酸獲取能量嗎,為什么我們的尿液中會(huì)有尿素等物質(zhì)呢
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2017-12-15 00:16發(fā)布了問答
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維生素B可以解酒嗎
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2017-11-18 20:56發(fā)布了問答
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脂類全合成機(jī)油為什么沒人用?
- 感覺用酯類全合成機(jī)油的人好少啊,是不是這個(gè)油不好???... 感覺用酯類全合成機(jī)油的人好少啊,是不是這個(gè)油不好??? 展開
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2017-11-16 23:49發(fā)布了問答
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貓會(huì)帶狂犬病毒嗎
- 貓會(huì)帶狂犬病毒嗎
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2017-08-06 23:23發(fā)布了問答
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固體膠是怎么做的?
- 固體膠是怎么做的?固體膠是怎么做的?
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2017-07-06 03:40發(fā)布了問答
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氨基酸注射液的作用?
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