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酶粉     
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  enzyme powder
     Enzyme powder and sodium alginate were dissolved in an HAc-NaAc buffer at pH 5.0,and then the mixture was added dropwise into a 0.05 mol/L CaCl_2 solution.
     将酶粉和海藻酸钠溶于pH 5.0的HAc-NaAc缓冲溶液,用注射器将此混合液滴入到0.05 mol/L无菌CaCl2溶液中,静置固化45 min,经过滤、洗涤和干燥后得到球状固定化酶.
短句来源
     The application of cellulase in jeans finishing was studied. The cellulase was produced by solid-state fermentation with Trichodcrma Koning 92-01. The activity of cxtracted enzyme powder on CMC was 2800U/g. The influences of various factors on enzyme-washing effects were tested, and the optimal operation conditions were determined.
     以生物技术对织物进行后整理的角度出发,着重研究了纤维素酶对牛仔布的酶洗工艺,通过固态发酵法培养纤维素酶产生菌康氏木霉92-01,分离提取出纤维素酶,所制得的酶粉水解CMC活性为2800U/g.通过正交实验,研究了各种主要因素对酶洗效果的影响,获得了较佳的工艺条件。
短句来源
     The results of orthogonal-regression experiment indicated that pH played the most important role in enzymatic hydrolysis, the content of NaCl was important factor. The optimum enzymatic hydrolysis conditions were optimized by RSA at room temperature(20℃), which were:pH 6.56, NaCl% 3.47, using quantity of crude enzyme powder was 5.37mg(5ml , 20%Brassica juncea Coss juice).
     RSA优化试验得出,在室温20℃下20%雪菜汁中芥子苷酶解的最佳条件为:pH6.56,NaCl浓度3.47%,冷冻干燥芥子酶粗酶粉添加量5.37mg(5ml20%雪菜汁中),反应1h,最大酶活可达7.67u。 研究结果可供腌制雪菜加工参考使用。
短句来源
     Abstract Alkaline cellulase was produced by alkalophilic Bacillus SHY8 5725. The fermented broth was pretreated by flocculant, then enzyme was precipitated by the addition of mixed salt. The recovery of enzyme activity with salt extraction was over 95% and the CMCase activity of enzyme powder was over 500 u/g.
     产碱性纤维素酶的嗜碱芽孢杆菌SHY8-5725发酵液经絮凝预处理后,采用混合盐析方法沉淀酶,盐析收率可达95%以上,所制得酶粉CMCase可达500u/g以上。
短句来源
     Crude enzyme powder could be prepared after ultra-filtration.
     酶液经超滤浓缩可制备得率较高的粗酶粉
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  enzymes powder
     Two Kinds of xylanase enzymes powder were obtained by both freezer drying and at 40℃ heating drying,and the rate of recovery were 68.3% and 45.7% respectively.
     木聚糖酶在 60— 65%硫酸铵饱和度下盐析效果最好。 冷冻干燥和 4 0℃烘干酶粉得率分别为 68 3 %和 4 5 7%。
短句来源
  bromelin powder
     re-covery 79. 8% ,and finally bromelin powder preparation activity is 5. 62×106u/g.
     最终酶粉活性为5.62×10~6u/g。
短句来源
  enzyme were studied
     The crude xylanase was obtained by salting out in 50% (NH 4) 2SO 4 and dried at 45~50 ℃ for 10 h. Some basic characteristics of this crude enzyme were studied.
     在 2 0℃条件下 ,采用相对饱和度为 50 %的 (NH4) 2 SO4一步盐析并经 4 5~ 50℃烘干 1 0h得到木聚糖酶粗酶粉 .
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      enzyme powder
    The production of crude enzyme powder, having a lytic activity of 100 units/mg, in batches of 80 kg is feasible.
          
    The crude enzyme powder from Rhizopus nigricans was immobilized by sorption and subsequent cross-linking with glutaraldehyde on collagen and polytetrafluoroethylene (PTFE) membranes.
          
    Its production was investigated at different moisture content of lipase enzyme powder because it is known that moisture content of enzyme affects the reaction in the gas phase.
          
    The complexes expressed higher specific catalytic activity in organic solvents as compared to a corresponding amount of enzyme deposited on to Celite or lyophilized enzyme powder.
          
    The complexes were considerably more active than enzyme powder or the complexes prepared with conventional synthesized detergents in organic media.
          
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      enzyme were studied
    Polymers and copolymers of horseradish root peroxidase (HRP) and Penicillium funiculosum 46.1 glucose oxidase (GO) have been synthesized and their catalytic properties have been characterized (free and immobilized forms of each enzyme were studied).
          
    Properties of the homogeneous enzyme were studied.
          
    A procedure for the isolation and purification of the enzyme was developed; the biochemical properties of the enzyme were studied.
          
    The cbo-type oxidase of Methylobacillus flagellatus KT was purified to homogeneity by preparative native gel electrophoresis, and the kinetic properties and substrate specificity of the enzyme were studied.
          
    The main properties of the immobilized enzyme were studied.
          
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    The work is based on a paper by Ronald C. Roberts (1980). Protein sample, after centrifugation and dialysis, is seperated into zones by disc electrophoresis. And then the gel column is made to contact directly (or after being immersed in a proper buffer to change its pH) with an agarose gel plate containing casein for enzyme reaction. After incubation, the casein is hydrolysed by proteinase in the gel and the colorles:s proteinase zones on the agarose plate can be seen in contrast with the blue background, which...

    The work is based on a paper by Ronald C. Roberts (1980). Protein sample, after centrifugation and dialysis, is seperated into zones by disc electrophoresis. And then the gel column is made to contact directly (or after being immersed in a proper buffer to change its pH) with an agarose gel plate containing casein for enzyme reaction. After incubation, the casein is hydrolysed by proteinase in the gel and the colorles:s proteinase zones on the agarose plate can be seen in contrast with the blue background, which ap-pears through prdtein fixation, staining and destaining procedures. The results of this method have been compared with those of the direct method (direct visualization of proteinase zones on the gel).

    本法是在Ronald C.Roberts(1980)酶谱方法的基础上发展的,先在盘电泳凝胶上分离样品,再在载玻片琼脂糖平板上显示酶谱.我们用此方法来显示枯草杆菌商品酶粉的蛋白酶酶谱.蛋白酶样品经离心、透析后,先作盘电泳分离,电泳毕凝胶直接(或先浸在适当缓冲液中改变凝胶pH)与含酪素的琼脂糖平板贴在一起保温,使凝胶中的蛋白酶水解酪素,平板经固定、染色、脱色处理后,酪素未水解部分被染成蓝色背景,把无色的水解区域作为酶带衬托出来.还与在电泳凝胶上直接显示蛋白酶酶谱的方法作了比较.此外,以贴印法显示的各种酶谱,也存在着酶反应pH与电泳凝胶pH不一致的共同问题,对已有的改变凝胶pH的方法作了较为详细的检查,发现有的不能达到预期的结果,对此提出了相应的措施.

    The penicillin acylase was extracted from Escherichia coli by method of solvent-freeze thawing, and purified by precipitation with (NH_4)_2SO_4, then dialysed and freeze-dried. The extraction yield was 47. 93%.

    采用冻融-溶媒法从大肠杆菌中提取青霉素酰化酶(经硫酸铵沉淀、透析、冷冻干燥),制得酶粉,活力为1100.37u/g,经六批提取试验,平均提取收率47.93%。分别测定游离酶及其固定化酶米氏常数Km值。游离酶的Km值为2.39mM,固定化酶按其颗粒大小不同,Km值分别为5.62、8.46、8.42mM。 在对pH稳定性测定中,游离酶最适pH为7~8,而固定化后在pH5~9之间都较稳定。对温度的稳定性测定中,游离酶与固定化酶在40℃以下都较稳定,但在45℃保温一小时后,游离酶只存留活力39.51%,而固定化酶却存留活力86.92%,二者有显著差异、温度再高相差更大。因此酶经固定化后,对pH和温度的稳定性都有明显提高。金属离子对青霉素酰化酶的活力有所影响。特别是铁离子和铜离子影响较大,故酶反应容器不能采用铁和铜的材料。

    Cellulase ZA-P was developed from Trichoderma reesei ZA-1.Optimum conditons for submerged culture for the strain were investigated. Its special activity of paperase in culture filtrate was assayed as 1.0-2.5 IU/ml. The enzyme was refined by adjusting pH of culture filtrate, precipitation with (NH_4)_2SO_4 sotution at low concentrations, then decolored and desalted. The whole process was simple and economical. Comparison tests between Cellulase ZA-P and Onozuka R—10 on protoplast preparation of rice and tomato...

    Cellulase ZA-P was developed from Trichoderma reesei ZA-1.Optimum conditons for submerged culture for the strain were investigated. Its special activity of paperase in culture filtrate was assayed as 1.0-2.5 IU/ml. The enzyme was refined by adjusting pH of culture filtrate, precipitation with (NH_4)_2SO_4 sotution at low concentrations, then decolored and desalted. The whole process was simple and economical. Comparison tests between Cellulase ZA-P and Onozuka R—10 on protoplast preparation of rice and tomato were conducted, and they were well-matched in protoplast yield, recovery and regeneration of protoplasts. Cellulase ZA-P was not poisonous to plant protoplasts. Cellulase ZA-P has also been used to prepare other protoplasts such as that of tobacco, cabbage, broad bean, wheat, barley etc.

    Cellulase ZA-P的产生菌为李氏木霉(Trichoderma reesei ZA-1)。研究出适于此菌产酶的液体发酵培养基配方和最佳发酵条件。其发酵液的滤纸酶活力达1.0~2.5IU/ml。发酵液经调节pH值,硫酸铵低浓度盐析和聚苯胺酚树脂脱色等处理后酶液得到纯化,最后经一种简便经济的脱盐干燥方法获得精制酶粉。Cellulase ZA-P可用于蚕豆、大小麦、番茄、烟草和青菜等多种科属植物的原生质体制备。在水稻和番茄上进行的测定试验表明,Cellulase ZA-P能分离产生大量的原生质体,其中番茄原生质体的成活率大于90%,经培养后能正常分裂形成细胞团,并进一步发育成植株。对细胞脱壁效果,原生质体成活率及原生质体分裂频率等方面与Onozuka R-10及RS的效果相当,而对原生质体无毒害。

     
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