抽提

The precursors of mast cell degranulating peptide genes were amplified by RT PCR from the total RNA of venom gland of two honeybee species, Apis mellifera ligustica,Apis cerana cerana ,and three wasp species, Vespa magnifica,Vespa velutina nigrothorax and Polistes hebraeus ,respectively.

从中华蜜蜂、意大利蜜蜂、大胡蜂、墨胸胡蜂和亚非马蜂 5种雌成蜂毒腺中快速抽提总RNA ，用RT PCR方法分别扩增各得到大小约为 35 0bp的cDNA片段，进一步将这 5个片段克隆入pGEM T easy载体，进行测序和序列分析。

Some evidences prove that the viscosity of straw soda pulping black liquor will be reduced after it is circulated for several times in the cooking, and the contents of silica and polyose are decreased.

结果表明，随着黑液循环达到平衡，抽提的黑液黏度下降，黑液中二氧化硅含量以及聚糖含量减少。

Variance in chemical components of the former is similarto the latter;the content of α-cellulose,lignin increase with the growth of age,the content of extract,hemicellucose,polysaccharose and mineral elementsdecrease with the grow of age;pH value is acid and increase with growth.

早园竹的化学成分含量随年龄的变异规律基本类似于毛竹，α-纤维素含量、木质素含量随着年龄增大而增大；抽提物、半纤维素、聚戊糖、灰分含量随着年龄增大而降低；pH值呈酸性，酸性随着年龄增大而减弱。

Fromthe point of view of chemical components,α-cellulose content for differentage-degrees bamboo is mostly the same,slightly increasing with the growth ofage,lignin content increases with the growth of age,the contents of extract,hemicellulose,polysaccharose,mineral elememts decrease with the growth ofage;the result shows the electric conductivity of bamboo is mainly decided bythe content of mineral elements,with the growth of age,volume resistivitybecomes great.pH value shows acid,acidity decreases with the growth of age,this is mainly due to the decrease of fraction of bamboo parenchyma with thegrowth of age.

从化学成分角度来说，不同年龄竹材α-纤维素含量差异不大，一般随着年龄增大而增大；木质素含量随着年龄增大而增大；抽提物、半纤维素、聚戊糖、灰分含量随着年龄增大而降低；研究表明竹材的导电性主要由矿质元素含量大小决定，随着年龄增大，体积电阻率越来越大；pH值呈酸性，酸性随着年龄增大而减弱，这主要由于竹材薄壁组织比量随着年龄增加而减少，内含物如淀粉减少，导致酸性减弱。

The possibility is studied for producing bean extractive solvent oil boiling range of 60～90℃with the aromatic raffinate of splitting light-end products.

研究了轻烃裂解的芳烃油余油生产大豆抽提溶剂油（60～90℃馏分）的可能性。

Aging mechanism of wood-plastic composite was: light and heat break down the long molecular chains of wood flour and plastic; the free radicals reacted with the oxygen, which generated carbonyl groups, hydroperoxides and so on; the free radicals also had cross linking reaction, which generated alkoxy; Water destroyed the interface of wood flour and plastic, hydrolyzed ester additives, extracted the small molecule additives and degradation products; Microorganism degraded cellulose, semicellulose, lignin and ester additives; degradation product from different component accelerated the aging, which could be exampled by the fact that HCl from degradation of PVC accelerated the hydrolyzation of cellulose and semicellulose.

木塑复合材料的老化机理为：光和热引发木塑复合材料中木质组分和塑料组分大分子链断裂，产生的自由基与氧气作用，发生链支化反应生成羰基、氢过氧化物等，发生交联反应生成烷氧基等；水分破坏木-塑界面、水解酯类添加剂、抽提小分子添加剂和降解产物；微生物分解纤维素、半纤维素、木素和酯类添加剂；木塑复合材料中各组分的降解产物相互促进老化，PVC降解产生的HCl溶于水，促进了纤维素和半纤维素的水解。

Two DNA slices separated on denaturing gradient gel from Sonneratia alba soil sample were recovered and the recovered DNA were used to establish two clone libraries.

不经微生物分离培养步骤，直接从土壤中抽提总DNA ，分析其中 16SrDNA的序列多态性，以此反映微生物的种群构成，是近 10年来逐步发

This study discussed the composition of coal pyridine soluble from column-chromatography and the Soxhlet extraction method.

本研究以吡啶为溶剂，对准葛尔黑岱沟、平朔、潞安常村3种不同变质程度的煤样进行了柱色谱分离和索氏抽提。

7 typical Chinese coal samples were extracted by NMP/CS2 system at around 90 ℃ by Soxhlet method.

在90 ℃～100 ℃温和实验条件下，采用溶剂N-甲基-2吡咯烷酮及其与二硫化碳(NMP+CS2)混合溶剂体系对我国7个典型煤种进行抽提研究。

The mixture (10–16 g) was introduced into the cellulose extraction thimble of a Soxhlet apparatus.

混合物(10-16 g)被介绍了入索格利特用具的纤维素抽提套管。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。