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Expression level of rhGH could reach 250 mg/L culture solution by means of selecting components of original culture media, components of supplemental media, volume of supplemental media, the time of supplying supplemental media and supplying speed of supplemental media, secretion rhGH was found to represent 44%~54% of the total proteins in periplasm, and the fermentation time was reduced to 8 hrs.

通过对发酵培养基成分、补料成分、补料体积、补料时机和滴加流速的选择,分泌表达rhGH的量可达到250 mg/L,占周质蛋白的44%~54%,发酵周期缩短为8小时。

Expression level of rhGH could reach 250 mg/L culture solution by means of selecting components of original culture media, components of supplemental media, volume of supplemental media, the time of supplying supplemental media and supplying speed of supplemental media, secretion rhGH was found to represent 44%-54% of the total proteins in periplasm, and the fermentation time was reduced to 8 hrs.

通过对发酵培养基成分、补料成分、补料体积、补料时机和滴加流速的选择,分泌表达重组人生长激素的量可达到250mg/L,占周质蛋白的44%~54%,发酵周期缩短为8小时。

A rapid and effective' test of SOD activity in fresh tomato by the polarographic oxygen electrode is reported in this paper.

本文用极谱氧电极法检测新鲜西红柿中SOD的活力,使用了不同的抽提方法,结果表明用pH7.8磷酸缓冲液加定量KH2PO4的抽提方法,可达到快速、微量、准确的检测效果

As a key step of the synthesis, the Friedel-crafts acylation was researched. And the optimal operation variables were determined through orthogonal experiment: when 0.lmol acetanilide, 0.26mol aluminum chloride, 0.12mol propionyl chloride and 200ml carbon disulfide are introduced, and the reaction time is 5 hour, the yield can be up to 57.3%. The solid super acid catalyst was preliminary studied. Four solid super acid catalysts were prepared to take the place of aluminum chloride, and it was indicated that AlCl3 acidic resin can better catalyze the Friedel-Crafts reaction of acetanilide.

对合成路线中的Friedel-Crafts酰基化反应进行了研究,运用正交实验设计确定了最佳工艺条件:当乙酰苯胺用量为0.1mol时,AlCl_3用量为0.26mol、丙酰氯用量为0.12mol、溶剂用量为200ml、反应时间为5h,产率可达到57.3%;对于固体超强酸催化剂进行了初步研究,合成了四种催化剂,其中负载AlCl_3强酸性树脂对于乙酰苯胺的Friedel-Crafts酰基化具有一定的催化活性。

Experimental results indicate the proposed method is feasible,and the designed filter banks can obtain the satisfying reconstructive precision.

实验结果表明此方法是可行的,所设计的滤波器组可达到令人满意的重构精度。

A new fullerene derivative containing energy-producing groups was prepared, and the reaction conditions affecting the yield were studied by the kroenecker method. The optimal reaction conditions with a 53.5% yield (based on consumed C60) are: 1:3:6 of molar ratio of C60 , o–nitrobenzaldehyde and sarcosine , 55℃ of reaction temperature, 12 h of reaction time, 40mL of toluene solvent.

利用N-甲基甘氨酸、邻-硝基苯甲醛和C60反应,合成分离出了含有硝基的新型富勒烯吡咯烷衍生物,通过正交试验对其工艺条件进行了研究,探讨了反应物剂量比、温度、时间和溶剂体积对产物产率的影响,得到了合成产物的最佳工艺条件:反应物剂量比为1:3:6、温度为55℃、反应时间为12h、溶剂甲苯体积为40mL,此时产物产率可达到53.5%(以消耗的C60计)。

Stage army interior has sound to think, army is standing by the shallow mountain area of central mountain range to build subterranean car fortress, as use scatteredly; Purchase perpendicular case fall opportunity for combat, should be the important way that prospective air force proposes armament fight; In addition, the opportunity for combat with huge amount is scattered maintain machine level ground, can achieve camouflage result.

台军方内部有声音认为,陆军应该在靠近中央山脉的浅山地区建造地下车堡,作为疏散之用;采购垂直起降战机,应是未来空军建军备战的重要方向;此外,数量庞大的战机疏散保养机坪,可达到伪装效果。

The effect of the special monomers on the properties of the emulsion was studied. The results showed that when the amount of GMA was 4.4% and the amount of actyflon was 1.0% of the monomers, salt spray resistance of the emulsion, could be up to 240 h without rust spots and babbles.

结果表明,当环氧单体甲基丙烯酸缩水甘油醋用量为总单体用量的4.4%,含氟单体用量为总单体用量的1.0%时,能够显著提高乳液的交联度和疏水性,乳液成膜后进行中性盐雾实验,中性盐雾时间可达到240h,板面无锈点,主体无起泡。

In different treatments there were significant differences in male sterility among INACs, of which I TA showed the highest rate of sterility and the best sterility stability under different conditions; meanwhile, altering nucleo cytoplasmic relationship by substitutional backcrosses could modify and improve male sterility of CMS lines.

结果表明,同核异质不育系不育度在年份间、播期间、实生稻与再生稻间差异极显著,不同细胞质不育系间差异显著,其中I特A在各种处理条件下均表现出最高的不育度和最好的不育稳定性。通过回交核置换技术培育新核质关系的同核异质不育系,可达到修饰改良育性的目的。

According to our experimental results, no information can be revealed through observing any camouflaged image.

由我们的实验结果显示,在实验中我们知道一般人并无法从任意一张伪装影像中观察出机密二元图的相关资讯,同时我们的方法可达到一定的安全水准。

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推荐网络例句

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了,但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场,你等着挨绳子吧!

Several theories about reigniting and extinguishing of the arc have been refered.

本文综合考虑了几种电弧重燃和熄灭理论。