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[求助]
麻烦翻译一下，本人英文水平不太好
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Statistical optimization of dilute sulfuric acid pretreatment of corncob for xylose recovery and ethanol production The interest on use of lignocellulose for producing fuels and chemicals is increasing as these materials are low cost, renewable and widespread sources of sugars. Corncob is an ttractive raw material for xylose and fuel ethanol production due to its high content of xylan and glucan. In this study, the central composite design of response surface method was used to optimize dilute H2SO4 pretreatment of corncob, in respect to acid concentration (0.16-1.84%), treatment time(0.16-1.84 h) and temperature (105-130 C) for xylose production. Enzymatic hydrolysis of the remaining solid was carried out further to evaluate the acid pretreatment conditions for maximizing glucose production. The results showed that pretreatment conditions for the highest xylose production was 1% sulfuric acid for 1.5 h at 123 C, corresponding to 87.2% total xylan converted to xylose and that for the highest glucose+cellobiose recovery was 0.5% sulfuric acid for 30 min at 125 C, corresponding to 78.1% total glucan converted to glucose þ cellobiose. In the subsequent simultaneous saccharification and fermentation (SSF) experiments using 14% glucan substrates pretreated under above two kinds of conditions, 47 g l1 ethanol with a 65.8% theoretical yield and 50.2 g l1 ethanol with a 70.4% theoretical yield were obtained,respectively. |
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爱与雨下: 金币+1 2013-04-15 19:29:11
sltmac: 金币+5, 翻译EPI+1 2013-05-21 09:33:51
爱与雨下: 金币+1 2013-04-15 19:29:11
sltmac: 金币+5, 翻译EPI+1 2013-05-21 09:33:51
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木糖恢复和乙醇生产的玉米芯稀硫酸预处理的统计优化 利用木质纤维素生产燃料和化学品正在增加，因为这些材料成本低，可再生能源和广泛的糖源。玉米芯是作为生产木糖和燃料乙醇的原料，由于其有高的木聚糖和葡聚糖。在这次研究中，综合设计了响应面法，用来优化稀H2SO4浓度（0.16-1.84％），治疗时间（0.16-1.84小时）和温度（105-130？C木糖生产）对于预处理玉米芯的影响。进一步对剩余的固体进行酶水解评估以达到最大化的葡萄糖生产的条件。结果表明，最高的木糖生产的预处理条件为1％的硫酸，1.5小时在123℃时，对应于总效率87.2％木聚糖转化为木糖；而且达到最高的葡萄糖的总木聚糖+纤维二糖的回收率。当条件为0.5％的硫酸，30分钟，在125℃时，对应于78.1％的总转化成葡萄糖t纤维二糖的葡聚糖。在随后进行的糖化和发酵（SSF）的实验中使用14％的葡聚糖底物预处理根据以上两种条件下，47冰川1乙醇与理论产率的65.8％和50.2乙醇，分别得到具有70.4％的理论产率。 怎么说~你的这个英文貌似有点问题~~~~请见谅· |
2楼2013-04-15 14:24:47
