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| 本帖產(chǎn)生 1 個 翻譯EPI ，點(diǎn)擊這里進(jìn)行查看 | |||
407599831木蟲 (著名寫手)
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[求助]
翻譯幾句話——土壤方面
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1. 題目：Association of macroaggregates and metals in coastal waters（不清楚這里的Association of翻譯成什么合適） 2. The composition and structure of marine dissolved organic matter(DOM) are important features that can affect the rates and extent of its degradation (Kujawinski et al., 2004) and aggregation into colloids—aggregates and macrogels (Verdugo et al., 2004).（不清楚colloids—aggregates and macrogels翻譯成什么合適 ） 3. Macroaggregates (macrogels) occurring episodically in the northern Adriatic, offer a rare opportunity to study interactions between marine organic macromolecules and metals and metalloids (Me). Macrogels are formed by agglomeration of dissolved heteropolysaccharides, mostly of phytoplankton origin. Filtration and centrifugation were used to discriminate between macrogel matrix and interstitial water colloids. The interstitial fraction was then used in an incubation experiment to follow the progress of microbial degradation of colloids. The colloids were ultrafiltered through membranes and each size class of colloids (N30 kDa, 10–30 kDa and 5–10 kDa) was analyzed for metal, metalloid, organic carbon (Corg) and total nitrogen (Ntot) content. Higher Me concentrations and lower Me/Corgratios in matrix, which are an indicator of Me bound to organic matter, suggest that Me in a matrix can also be bound onto Me containing particles. All the studied Me in macroaggregate colloidal fraction, except Se, proved to be bound to large macromolecules (N30 kDa), mainly glycoproteins and aminopolysaccharides. During the rapid degradation of all, except the 5–10 kDa fraction, the Me associated with theN30 kDa fraction were markedly preserved. Consequently, the Me/Corgratios increased due to the loss of Corgand relative increase of metal-binding sites. The observed differences between our Me/Corgratios and the Irving–Williams series can be explained by variable background concentrations of the studied Me in the northern Adriatic. Comparison between Me levels in macroaggregate colloids and dissolved marine colloids, considered to be macroaggregate precursors, revealed similar values. Distribution coefficients (Kd)between colloidal and truly dissolved Me were lower than Kdfor particulate matter, suggesting that organic colloids, including macroaggregates, exhibit rather weak Me binding capacity and that Me are not distributed homogenously in the various particle pools in the northern Adriatic coastal waters |
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【答案】應(yīng)助回帖
★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ...
RXMCDM: 金幣+1, 多謝應(yīng)助！ 2014-07-24 00:16:46
407599831: 金幣+85, 翻譯EPI+1, ★★★★★最佳答案, 翻譯的很不錯，但是有些感覺不是很確切。可能是領(lǐng)域不同的原因吧 2014-07-25 16:58:08
RXMCDM: 金幣+1, 多謝應(yīng)助！ 2014-07-24 00:16:46
407599831: 金幣+85, 翻譯EPI+1, ★★★★★最佳答案, 翻譯的很不錯，但是有些感覺不是很確切。可能是領(lǐng)域不同的原因吧 2014-07-25 16:58:08
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1，沿海水域中大顆粒物和金屬物質(zhì)的聯(lián)系。 2，沿海溶解有機(jī)物（DOM）的組成和結(jié)構(gòu)式很重要的，它們能影響海洋的降解速率和程度（Kujawinski et al., 2004），并且也能影響海洋聚集膠體或者大顆粒凝膠的速率和程度。 3，大團(tuán)聚體（大粒凝膠）在亞得里亞海北部比較常見，它為我們研究海洋中有機(jī)大分子及金屬和非金屬物質(zhì)的關(guān)系提供了難得的機(jī)會。大粒凝膠是由溶解的雜化糖聚集而成，浮游植物為它的大量來源。采用過濾及離心兩種方法來區(qū)分大粒凝膠基質(zhì)和間隙水膠體。隨后在溫育實驗中采用間質(zhì)餾分方法來跟蹤膠體的微生物降解過程。膠體經(jīng)過細(xì)胞膜進(jìn)行超濾，每個單位的膠體(N30 kDa, 10–30 kDa and 5–10 kDa)，對其進(jìn)行金屬，非金屬，及總氮含量分析。在矩陣中的低濃度，高濃度的非金屬物質(zhì)濃度與有機(jī)物的指標(biāo)是相呼應(yīng)的，表明矩陣的非金屬物的濃度能反映實際的非金屬物質(zhì)的濃度。在大顆粒膠體中研究的非金屬物質(zhì)，除了硒之外，都和大分子(N30 kDa)相綁定，主要是糖蛋白及多糖胺基物。在所有的快速降解的組分中，除了5–10 kDa 組分，和(N30 kDa組分有關(guān)系的非金屬組分都被保存。因此，金屬結(jié)合位點(diǎn)的相對增多導(dǎo)致了corgand的損失，從而矩陣中非金屬濃度增大。本文我們研究的非金屬/corgand系統(tǒng)與歐文-威廉姆斯系列之間存在顯著差異是因為研究的亞得里亞海的非金屬物的不同背景濃度，對大顆粒膠體和溶解的海洋膠體中的非金屬量進(jìn)行比較，發(fā)現(xiàn)兩者值類似。膠體及溶解的非金屬物質(zhì)的分配系數(shù)比懸浮顆粒的分配系數(shù)要小，表明有機(jī)膠體，包括大顆粒膠團(tuán)，表現(xiàn)出相當(dāng)弱的自我結(jié)合能力，并且在亞得里亞海沿海水域中非金屬物質(zhì)分布并不均勻。 |
2樓2014-07-23 16:33:07
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