| 24小時(shí)熱門(mén)版塊排行榜 |
| 4 | 1/1 | 返回列表 |
| 查看: 913 | 回復(fù): 3 | |||
| 本帖產(chǎn)生 1 個(gè) 翻譯EPI ,點(diǎn)擊這里進(jìn)行查看 | |||
[交流]
英譯中,求助 超聲6
|
|||
|
It was also observed in experiment that as ethanol concentration increases, the polarity of solvent change, which would extract more impurity. It may be seen that 42% ethanol could product the highest extraction yield. The results suggest that 42% ethanol could offer the suitable vapour pressure, viscosity and surface tension of extraction solvent, which are very important physical characteristics of solvent influencing efficiency of sonication activity, for the flavonoids-enriched extract. On the other hand, presence of suitable water in solvent could facilitate increase at the extraction yields since water could helpful to enhance swelling of plant material, which is favourable to increase the contact surface area between the plant matrix and the solvent, resulting in increase of the extraction ratio |
禁蟲(chóng) (職業(yè)作家)
|
It was also observed in experiment that as ethanol concentration increases, the polarity of solvent change, which would extract more impurity. It may be seen that 42% ethanol could product the highest extraction yield. 在試驗(yàn)中,我們還觀察到隨著乙醇的濃度上升,溶劑的極性也會(huì)改變,結(jié)果是更多的雜質(zhì)被析出(萃。?梢酝茢42%的乙醇濃度可以造成最高的萃取率。 [ Last edited by zerohead on 2010-7-30 at 11:33 ] |
木蟲(chóng) (正式寫(xiě)手)
木蟲(chóng) (職業(yè)作家)
小呆家族之呆呆軍師
| 試驗(yàn)中觀察到溶劑的極性隨著乙醇濃度的增加而改變,從而增加雜質(zhì)的溶出。發(fā)現(xiàn)42%乙醇濃度下可達(dá)到最高萃取率。該結(jié)果提示了42%乙醇可提供最適合的蒸汽壓、粘滯性以及萃取劑的表面張力,而蒸汽壓、粘滯性以及萃取劑的表面張力是影響超聲法提取黃酮類(lèi)物質(zhì)有效性的重要物理特征。另一方面,溶劑中適當(dāng)比列的水有助于萃取率的提高。因?yàn)樗艽龠M(jìn)植物材料的膨脹,有利于增加提取物與溶液的接觸面積,進(jìn)而導(dǎo)致提取率的提高。 |

| 4 | 1/1 | 返回列表 |
| 最具人氣熱帖推薦 [查看全部] | 作者 | 回/看 | 最后發(fā)表 | |
|---|---|---|---|---|
|
[考研] 276求調(diào)劑。有半年電池和半年高分子實(shí)習(xí)經(jīng)歷 +9 | 材料學(xué)257求調(diào)劑 2026-03-23 | 10/500 |
|
|---|---|---|---|---|
|
[考研] 求調(diào)劑 +4 | 研研,接電話 2026-03-24 | 4/200 |
|
|
[考研] 環(huán)境學(xué)碩288求調(diào)劑 +8 | 皮皮皮123456 2026-03-22 | 8/400 |
|
|
[考研] 333求調(diào)劑 +6 | 87639 2026-03-21 | 10/500 |
|
|
[考研] 求調(diào)劑院校信息 +6 | CX 330 2026-03-21 | 6/300 |
|
|
[考博] 招收博士1-2人 +3 | QGZDSYS 2026-03-18 | 4/200 |
|
|
[考研] 考研調(diào)劑 +3 | 呼呼?~+123456 2026-03-21 | 3/150 |
|
|
[考研] 材料工程專(zhuān)碩 348分求調(diào)劑 +3 | 冬辭. 2026-03-17 | 5/250 |
|
|
[考研] 0703化學(xué)調(diào)劑 +4 | 妮妮ninicgb 2026-03-21 | 4/200 |
|
|
[考研] 一志愿 西北大學(xué) ,070300化學(xué)學(xué)碩,總分287,雙非一本,求調(diào)劑。 +3 | 晨昏線與星海 2026-03-18 | 3/150 |
|
|
[考研] 22408 344分 求調(diào)劑 一志愿 華電計(jì)算機(jī)技術(shù) +4 | solanXXX 2026-03-20 | 4/200 |
|
|
[考研] 308求調(diào)劑 +3 | 阿姐阿姐家啊 2026-03-18 | 3/150 |
|
|
[考研] 321求調(diào)劑 +9 | 何潤(rùn)采123 2026-03-18 | 11/550 |
|
|
[考研] 一志愿中海洋材料工程專(zhuān)碩330分求調(diào)劑 +8 | 小材化本科 2026-03-18 | 8/400 |
|
|
[考研] 330求調(diào)劑 +4 | 小材化本科 2026-03-18 | 4/200 |
|
|
[考研] 一志愿蘇州大學(xué)材料求調(diào)劑,總分315(英一) +5 | sbdksD 2026-03-19 | 5/250 |
|
|
[考研] 招收調(diào)劑碩士 +4 | lidianxing 2026-03-19 | 12/600 |
|
|
[考研] 085600材料與化工調(diào)劑 324分 +10 | llllkkkhh 2026-03-18 | 12/600 |
|
|
[考研] 材料考研調(diào)劑 +3 | xwt。 2026-03-19 | 3/150 |
|
|
[考研] 0703化學(xué)調(diào)劑 +3 | 妮妮ninicgb 2026-03-17 | 3/150 |
|