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glucoside bond
相关语句
  苷键
     By IR analysis,SPA 1 and SPA 2 are mainly composed of residues by β glucoside bond;
     经红外光谱分析,SPA1、SPA2 均以糖残基通过β苷键连接而成;
短句来源
     SPA 3 is mainly composed of residues by α glucoside bond.
     SPA3 以糖残基通过α苷键连接而成
短句来源
  糖苷键
     The major SCS is chondroitin sulfate C (CSC) that is the polymer of disaccharide units, which are glucuronic acid connect with sulfated N-acetylgalactosamine by β1→3 glucosidic bond. And the disaccharide units are connect by β1→4 glucoside bond to each other, forming the liner chain polysaccharides.
     其中SCS主要为硫酸软骨素C(又称6-硫酸软骨素),其化学结构由葡糖醛酸与硫酸化N-乙酰氨基半乳糖通过β1→3糖苷键组成的二糖单位为主要重复双糖单位,双糖之间通过β1→4糖苷键连接形成线形分子。
短句来源
     According to the infrared spectrum and gaseous phase mass spectroscopy, the hemp polysaccharides HS1 was consisted of xylose which was linked by β(1,5)glucoside bond and the HS2 was consisted of glucose which was linked by β(1,4) glucoside bond.
     通过红外光谱和甲基化以及气相质谱分析得出,火麻多糖HS1的分子结构是以β(1,5)糖苷键连接的木糖为主链,多糖HS2的分子结构是以β(1,4)糖苷键连接的葡萄糖为主链。
短句来源
     Lysozyme is a kind of glucoside hydrolytic enzyme,and its molecular weight is about 14000-15000Da. Lysozyme can hydrolyze the glucoside bond 8-1,4 between N-acetylglucosamine and N-acetyl muramic acid , so that it can dissolve the cell wall of gram-positive bacteria and bacteriolyze.
     溶菌酶是糖苷水解酶,分子量14000Da~15000Da,溶菌酶能水解N-乙酰葡萄糖胺与N-乙酰胞壁酸之间的β-1.4糖苷键,因此可以溶解革兰氏阳性菌的细胞壁而具有溶菌作用。
短句来源
     The main backbone of the water soluble polysaccharides from leaves of panax quinquefolium linn is consisted of glucose which is linked by β(1,4) glucoside bond. The branching ratio of the main strand is 25%,while that of the molecule is 47.8%. \;
     西洋参叶的水溶性多糖是以 β(1,4)糖苷键连接的葡萄糖为主链 ,主链上的分枝率为 2 5 % ,分子的分枝点率为 47 8%。
短句来源
     The results show that BOS-2 is composed of D-fructose and D-glucose in a molar ratio of about 12∶1, which is confirmed by the composition of 12 fructose residues linked by -{β(2→1)-} glucoside bond and 1 glucose residue linked by α(1→2) glucoside bond at the end of linear straight sugar chain. It is shown to be a single homogeneous component.
     结果表明,BO S-2由果糖和葡萄糖组成,摩尔比约为12∶1,纯度较高,为均一性组分; 由12个呋喃型的果糖以β(2→1)糖苷键相连,1个吡喃型的葡萄糖以α(1→2)糖苷键连接在果糖末端的线性直链结构,是一种菊糖构型的低聚果糖.
短句来源
  葡萄糖苷键
     Being not able to cut α-1.6glucoside bond, isomaltosyl, maltose G4 may be remained when amylopectin or glycogen is acted In addition, BSA has some catalytic activity for intermolecular transglycosylation.
     BSA不能切割1.6-葡萄糖苷键,作用于支链淀粉时残留异麦芽糖苷麦芽糖BSA还有一定的分子间糖基转移催化活性。
短句来源
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  glucoside bond
This Α-amylase readily hydrolyzed the Α-1,4 glucoside bond in soluble starch and amylose A (MW, 2900), but did not hydrolyze the Α-1,6 bond and cyclic polysaccharides such as Α- and Β-cyclodextrin.
      


The foundamental properties of Saccharogenic α-amylase Is similar to liquefying α-amylase when they act on starch. They cut α-1.4-glucoside bond randomly, produce lower dextrin and oligosaccharides. BSA is able to hydrolyze oligosaccharides (G7-G4) and has a weak ability for hydrolyzing G3, the main products are G2 and G. As compared with BLA, BSA can split starch more completely. The reducing ends produced by BSA are more than that produced by BLA when the blue values are at the same level. Being not...

The foundamental properties of Saccharogenic α-amylase Is similar to liquefying α-amylase when they act on starch. They cut α-1.4-glucoside bond randomly, produce lower dextrin and oligosaccharides. BSA is able to hydrolyze oligosaccharides (G7-G4) and has a weak ability for hydrolyzing G3, the main products are G2 and G. As compared with BLA, BSA can split starch more completely. The reducing ends produced by BSA are more than that produced by BLA when the blue values are at the same level. Being not able to cut α-1.6glucoside bond, isomaltosyl, maltose G4 may be remained when amylopectin or glycogen is acted In addition, BSA has some catalytic activity for intermolecular transglycosylation.

糖化型α-淀粉酶(BSA)作用于淀粉时与液化型α-淀粉酶(BLA)具有相同的基本特性——随机切割α-1.4葡萄糖苷键,产生小分子糊精、低聚糖。BSA能水解低聚糖(G7-G4),且对G3有一定的分解力,主要产物为G2和G。其水解淀粉程度比BLA彻底,同一蓝值时产生的还原端比BLA多。BSA不能切割1.6-葡萄糖苷键,作用于支链淀粉时残留异麦芽糖苷麦芽糖BSA还有一定的分子间糖基转移催化活性。

Corn starches were processed in Creusot-Loire BC-45 co-rotating twin screw extruder. Macromolecular structure of extruded corn starches was studied, using Sepharose CL-2B agarose gel filtration chromatography (AGFC), intrinsic Viscosity and determination of ferricyanide number. Both intrinsic viscosity and AGFC results showed that the average molecular size significantly decreased as a result of extrusion processing, the amount of carbohydrate excluded by Sepharose CL-2B lower for extruded sample than for unprocessed...

Corn starches were processed in Creusot-Loire BC-45 co-rotating twin screw extruder. Macromolecular structure of extruded corn starches was studied, using Sepharose CL-2B agarose gel filtration chromatography (AGFC), intrinsic Viscosity and determination of ferricyanide number. Both intrinsic viscosity and AGFC results showed that the average molecular size significantly decreased as a result of extrusion processing, the amount of carbohydrate excluded by Sepharose CL-2B lower for extruded sample than for unprocessed corn starches and thisresult was contributed to mechanical stress. Ferricyanide number resultes showed that some of the glucoside bonds of starches polymer was broken apart.

用Creusot-Loire BC-45型同向旋转双螺杆挤出机加工玉米淀粉。通过特性粘度,Sepharose CL-2B琼脂糖凝胶过滤层析,铁氰化钾数测定等方法,对挤出产物进行了研究。结果表明,经过挤压,玉米淀粉被降解,其平均分子大小降低,支链淀粉级分显著减小,淀粉聚合物中的部分糖苷键被裂解,应力是淀粉聚合物降解的主要原因。

Kinetics of hydrolytic degradation of bleached Populus davidiana and unbleached 72-poplarpulps with lignin contents of 0.23%and l.05%respectively was investigated.It was shown that the characteristics of this process is similar to that observed previously for celluloses of cotton,birch and conif-erous species,i.e. the existence of two stages of hydrolysis(a rapld and slow stage) and the attainment of“limiting”DP_L(DP_L=180 for cellulose of aspen;DP_L=206 for cellulose of popular).The kinetics of the hy-drolytic...

Kinetics of hydrolytic degradation of bleached Populus davidiana and unbleached 72-poplarpulps with lignin contents of 0.23%and l.05%respectively was investigated.It was shown that the characteristics of this process is similar to that observed previously for celluloses of cotton,birch and conif-erous species,i.e. the existence of two stages of hydrolysis(a rapld and slow stage) and the attainment of“limiting”DP_L(DP_L=180 for cellulose of aspen;DP_L=206 for cellulose of popular).The kinetics of the hy-drolytic degradation of celluloses are expressed by two stages characterized by different rates. The calcula-tion of reaction rate constants was based on the experimental data :that bleached Populus davidiana cellu-lose are hydrolyzed at a higher rate(K=2.5 × 10 ̄(-4)/min) than that of 72-poplar cellulose(K=1.6×10 ̄(-4)/min).The yield of the residue after hydrolysis decreases with increasing hydrolysis time and theterminal product yield was 83%~84%of initial materials. The lignin contents of samples were determined. Results showed that lignin contents varid greatlyonly in the early stages of hydrolysis (10~40 min).The lignin contents of unbleached and bleached pulpsdecreased 38%and 48%,respecaively. However,in the late stages (40~120 min),there were little differ-ences in the lignin contents. The presence of lignin plays a blocking role in the heterogeneous hydrolysisand decreases the rate constant.The greater amount of lignin present,the slower the penetration of hy-drolyzing agents into β-D-glucoside bond of the cellulose chain.

研究了木质素含量为0.23%的山杨漂白浆和1.05%的速生杨未漂浆稀酸低温多相水解降解反应动力学特性。结果表明,该过程与棉浆、桦木和针叶材浆具有相类似的特点,即纤维素多相水解降解过程分为两个明显阶段(快速降解和缓慢降解),而最终降至极限聚合度(山杨漂白浆为180;速生杨未漂浆为206)。两个阶段的纤维素水解降解动力学以其不同反应速度为特征,根据试验数据计算出反应速度常数:山杨漂白浆为K=2.5×10 ̄(-4)/min;速生杨未漂浆为K=1.6×10 ̄(-4)/min,前者明显地高于后者。随着水解时间的增加,水解残渣得率下降,最终结果达到83%~84%。测定了各水解试样的木质素含量,结果表明,水解前期(10~40min)木质素变化较大,山杨漂白浆下降48%,速生杨未漂浆下降38%;水解后期,木质素含量变化不大。木质素的存在对于多相(固-液)水解降解反应起着阻碍作用并降低其反应速度常数。木质素含量越高水解液渗透至纤维素大分子链之β-D-葡糖键的速度越慢。

 
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