The sample was pretreated with microwave - assisted extraction , purified by a cationic resin and derivatized in pre - columri prior to the determination of free amino acid 结果表明：经过不同工艺处理的烟丝，其游离态氨基酸含量呈现出不同程度的变化，且不同地区的样本也表现出特征性差异。
2.
If the quantity of sr is over some value ( 0 . 02 % - 0 . 04 % ) , the melt will absorb hydrogen , and result in the formation of cavities . we think the reason is that the dissociated sr destroyed the compact oxide film of the melt Sr的加入量过多( 0 . 02 0 . 04 )后，反而出现吸气现象，导致形成孔洞缺陷，我们认为这是游离态sr破坏了al - si合金的致密氧化膜所致。
3.
The organoleptic quality , respiration rate , opening degree , opening rate , as well as fresh weight and dry weight were studied during the opening of jasmine flower . free - form aromas , bound - form aromas and the activities of enzymes participated in aroma releasing were also investigated 本文主要研究了茉莉花在离体开放过程中外观形态、感官品质、游离态香气和结合态香气、呼吸、鲜重、干重以及可能的香气释放酶活性的变化。
4.
A method was developed for the determination of free amino acids in tobacco of different areas ( yunnan , guizhou and henan ) and of different technological processes using reversed phase high performance liquid chromatography ( rp hplc ) 摘要选取云南、贵州、河南的经不同工艺处理生丝、薄板干燥、高温气流干燥的烟丝；采用微波协助萃取技术进行样品的前处理；经活化的阳离子交换柱进行纯化，再用柱前衍生反相高效液相色谱的方法对其游离态氨基酸进行含量分析。
5.
From the results , it supposed that the stripe with rf 0 . 325 had a negative correlation with the opening and the aroma releasing of jasmine flower , and that the stripe with rf 0 . 83 participated in aroma releasing . effects of temperature and humidity on free - form aroma , respiratory rate , fresh weight , dry weight and the activities of enzymes relating to aroma releasing were also researched 研究温度和水份对茉莉花开放过程中呼吸、鲜重、干重、游离态香气及部分香气释放酶活性的影响，结果显示，温度通过调控茉莉花的呼吸作用、香气释放酶活性和失水速率，从而影响茉莉花的开放释香， 35有利于茉莉花的开放释香。
6.
Apart from geochemists from western countries , which paid a particular attention on amorphous iron - manganese oxides extracted by enzyme or 0 . 1 ~ 0 . 25m nh2oh ? hc1 , our results show that the extraction of metals adsorbed by clay and bound to the carbonate in soil is most useful to identify the concealed mineralizations in the semiarid and loess covered terrains , northern china 但与国外重点关注非晶质铁锰氧化物如酶、盐酸羟氨提取结果不同，在我国北方半干旱黄土覆盖景观区，粘土吸附和碳酸盐结合态金属元素的提取为最有效的提取步骤。而游离态、有机结合态的提取效果则受景观控制变化较大。
7.
At lower growth temperature , the lower extracting rate of carbon atoms from catalyst particles due to the lower activity of the catalysts resulted in more defects formed in carbon nanotubes . moreover , the lower transportation rate of carbon atoms in catalyst particles also made lots of carbon atoms deposited on the surfaces of grown carbon nanotubes , or on carbon wrapped catalyst particles , even to form amorphous carbon layers 在较低温度时，由于催化剂的活性较低，导致石墨面在生长过程中引入的缺陷较多；另一方面，碳原子在催化剂颗粒内迁移速率较低，使得多余的游离态碳原子(或原子团)可能在纳米碳管表面以非晶形式沉积，或者包覆催化剂使其“中毒”失去催化活性，或者直接形成非晶的碳纳米颗粒。
