| 5 | 1/1 | 返回列表 |
| 查看: 1837 | 回復(fù): 6 | |||
| 當(dāng)前只顯示滿足指定條件的回帖,點(diǎn)擊這里查看本話題的所有回帖 | |||
[求助]
測(cè)定藥物釋放曲線是否可以用在比色皿底部放置納米顆粒的方法?
|
|||
|
我想使用介孔硅納米顆粒載藥,由于樣品的量很少,1mL左右,感覺不太適合用透析的方法測(cè)釋放曲線,查了一下文獻(xiàn),看到一篇08年的JACS是這么測(cè)定的: _______________________________________________________________ The dye-loaded, stoppered particles (15 mg) were placed in the corner of a cuvette before carefully adding HEPES buffer (50 mM, 12 mL, pH ) 7.5). To open the snap-tops, a solution of PLE [0.12 mL, 10 mg/mL in 3.2 M (NH4)2SO4] was carefully added while the solution was stirred. The emission of rhodamine B in the solution above the particles was measured as a function of time using a 514 nm probe beam (15 mW), both before and after addition of PLE. ———————————————————————————————————————— 簡言之,就是在比色皿底部角落放納米顆粒,然后加入緩沖液,加入另一試劑(某種酶)后,被包裹的染料羅丹明B開始釋放出來,體現(xiàn)在熒光強(qiáng)度的變化上。 這種方法的優(yōu)點(diǎn)時(shí)對(duì)試劑樣需要得少,但我的疑問是,納米顆粒是如何在角落被放置的?加入溶劑后納米顆粒不就被沖起來,分散在整個(gè)溶液體系中了嗎?測(cè)得的熒光數(shù)據(jù)不一定是被釋放出來的染料,也有可能是仍被包裹載體中的染料所發(fā)出的熒光吧? 那么測(cè)定藥物釋放曲線是否可以用這種方法?如果可以,具體該如何操作?歡迎討論,謝謝 [ Last edited by oasis0709 on 2012-12-10 at 21:03 ] |
TOMA'S INDEX |
銅蟲 (小有名氣)

|
另外一篇advanced material也是這么做的 ——————————————————————————————————— Releasing experiments. Guest loaded Si-SS-CD was placed at the bottom of a quartz cuvette which was then filled with PBS. After addition of GSH or DTT, the fluorescence intensity of the solution of guest loaded Si-SS-CD was measured as a function of incubation time. ——————————————————————————————————— 難道dox在硅球內(nèi)和在硅球外的熒光還不一樣嗎? |
| 最具人氣熱帖推薦 [查看全部] | 作者 | 回/看 | 最后發(fā)表 | |
|---|---|---|---|---|
|
[考研] 求調(diào)劑 +7 | 研研,接電話 2026-03-24 | 8/400 |
|
|---|---|---|---|---|
|
[考研] 0703本科鄭州大學(xué)求調(diào)劑 +7 | nhj_ 2026-03-25 | 7/350 |
|
|
[考研] 283求調(diào)劑(080500) +14 | A child 2026-03-27 | 14/700 |
|
|
[考研] 282求調(diào)劑 +4 | wcq131415 2026-03-24 | 4/200 |
|
|
[考研] 348求調(diào)劑 +6 | 小懶蟲不懶了 2026-03-28 | 6/300 |
|
|
[考研] 311求調(diào)劑 +10 | lin0039 2026-03-26 | 10/500 |
|
|
[考研] 085600,專業(yè)課化工原理,320分求調(diào)劑 +4 | 大饞小子 2026-03-29 | 4/200 |
|
|
[考研] 考研調(diào)劑 +7 | 小蠟新筆 2026-03-29 | 7/350 |
|
|
[考研] 085600,專業(yè)課化工原理,321分求調(diào)劑 +5 | 大饞小子 2026-03-28 | 5/250 |
|
|
[考研] 數(shù)一英一271專碩(085401)求調(diào)劑,可跨 +7 | 前行必有光 2026-03-28 | 8/400 |
|
|
[考研] 調(diào)劑 +3 | 好好讀書。 2026-03-28 | 3/150 |
|
|
[考研] 308求調(diào)劑 +7 | 墨墨漠 2026-03-27 | 7/350 |
|
|
[考研] 272求調(diào)劑 +7 | 腳滑的守法公民 2026-03-27 | 7/350 |
|
|
[考博] 26申博 +3 | 加油沖! 2026-03-26 | 3/150 |
|
|
[考研] 305求調(diào)劑 +5 | 哇盧卡庫 2026-03-26 | 5/250 |
|
|
[考研] 求調(diào)劑 +3 | 劉柯@ 2026-03-24 | 4/200 |
|
|
[考研] 考研調(diào)劑 +9 | 小蠟新筆 2026-03-26 | 9/450 |
|
|
[論文投稿] Journal of Mechanical Science and Technology +3 | Russ_ss 2026-03-25 | 5/250 |
|
|
[考研] 求調(diào)劑 +3 | 李李不服輸 2026-03-25 | 3/150 |
|
|
[考研] 材料調(diào)劑 +3 | iwinso 2026-03-23 | 3/150 |
|