【求助】翻译二段句子

pengmu

2008/10/26

私聊

专业英语

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悬赏金额:11积分状态:已解决

Effect of pre-leaching time before MAE on
percentage extraction of tanshinones

Pre-leaching time at room temperature before
MAE for 2 min inﬂuenced the percentage extraction
of tanshinones (Fig. 6). If pre-leaching time was 45
min before MAE, the percentage extraction of tan-shinones can reach the highest. If the pre-leaching
time was more than 45 min, tanshinones had been
partly transferred from the root of Salvia miltiorrhiza
bunge to solvent before MAE. They were easy to
decompose at high temperature in the solvent [12],
so percentage extraction of tanshinones was de-
creased when pre-leaching time was more than 45
min. Pre-leaching for a short time before MAE was
of beneﬁt for improving the percentage extraction.
Comparison of MAE and conventional
extraction methods

Table 1 shows that MAE only for 2 min, ex-
traction at room temperature for 24 h, ultrasonic
extraction for 75 min, heating reﬂux extraction for
45 min, Soxhlet extraction for 90 min, MAE can
reach almost the same or even higher percentage
extraction of tanshinones. MAE obviously can re-
duce the extraction time in order to reach the same
percentage extraction.

lvjian1895 2008/10/27

室温下丹参酮在微波之前预浸2min就会对它的回采率有一定影响（图6）。微波前预浸45min丹参酮的回采率达到最大值。超过45min的话，丹参酮就会转变成赤参。高温下这种物质容易变质【12】，所以预浸时间超过45min，丹参酮的回采率就会降低。欲传统提取方法相比，在微波前对丹参酮短时间预浸有一定的好处。表1所示，微波2min，室温下提取24h，超声75min，加热回流提取45min，索氏提取90min，微波法是最好的，能够达到回采率的最大值。

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lvjian1895

第1楼2008/10/27

室温下丹参酮在微波之前预浸2min就会对它的回采率有一定影响（图6）。微波前预浸45min丹参酮的回采率达到最大值。超过45min的话，丹参酮就会转变成赤参。高温下这种物质容易变质【12】，所以预浸时间超过45min，丹参酮的回采率就会降低。欲传统提取方法相比，在微波前对丹参酮短时间预浸有一定的好处。
表1所示，微波2min，室温下提取24h，超声75min，加热回流提取45min，索氏提取90min，微波法是最好的，能够达到回采率的最大值。