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Then, nanoparticles were prepared with a reprecipitation method and tested. We found that the nanoparticles with small size and lower poly-dispersion index can be prepared though shortening deposited time, decreasing concentration, increasing deposited temperature and adding surfactant.

利用二次沉淀法制备出三种有机分子不同粒径的纳米微粒,通过改变时间、浓度、温度、表面活性剂等实验条件分析这些因素对纳米微粒粒度的影响,发现缩短放置时间、减少有机溶液的注入量、升高放置温度、加入表面活性剂可以得到小粒度,低分散度的纳米微粒。

To broaden desert shrub new utilizing fields, accelerate desert shrub developing to the direction of high added-value and high benefit, the paper studied on the liquefaction of Salix, Caragana and Poplar in the presence of Phenol under sulfuric acid catalysis. The optimum processing parameters for Salix, Caragana and Poplar liquefaction and resinification were investigated. The effect of molar ratio of formaldehyde to liquefied products and NaOH to liquefied products on the character and glue strength of liquefied products resin was studied.

摘 要:为了开辟沙生灌木资源新的应用领域,促使沙生灌木资源的利用向高附加值、高效益的方向发展,本文以苯酚作液化剂,以硫酸作催化剂对沙柳、柠条和杨木进行液化实验,分析了反应温度、液比、催化剂用量及液化时间对液化反应的影响;并研究了沙柳、柠条和杨木液化产物树脂化合成工艺和配方,分析了不同的甲醛与液化产物摩尔比以及氢氧化钠与液化产物摩尔比对沙柳、柠条和杨木液化产物树脂的各项性能的影响。

Endoplasmic reticula in enlarged C-tapetal cells were aggregated in stacks at first, and then produced numerous ER-vesicles. As inclusions in the vesicles increased, the cytoplasm in these cells decreased until it was replaced by starch grains and lipid droplets.

膨胀的C-绒毡层细胞中,内质网先发生聚集,之后断裂并产生大量内质网小泡;随着内质网小泡内容物增浓,细胞质逐渐变;最后,细胞内容物几乎全部变成多糖颗粒和以脂类物质为主的滴状物。

According to orthogonal experiments,thick salt method and thin alkali method for extraction of ribonucleic acid from waste yeast were compared.

通过正交实验对浓盐法和碱法提取啤酒废酵母核糖核酸进行了比较。

The high concentration of salt treatment and the thin alkaline treatment both of whom are used in extracting ribonucleic acid from waste beer yeast were studied in this work.

本文对浓盐法和碱法提取啤酒废酵母中的核糖核酸技术进行了研究,并对这2种方法进行了比较和优化,提出了浓盐法与碱法相结合提取核糖核酸的工艺技术路线,酵母中核糖核酸的提取率达90%以上,样品的纯度达90.3%。

Objective To investigate the protective efficacy of Lingzhi decoction on acute kidney injury caused by russula subnigricans in rats.

目的 探讨灵芝煎剂对亚褶黑菇急性中毒大鼠肾脏的保护作用。

All day long they fought by the Scaean gates and would have taken the city there and then, had not Apollo vouchsafed glory to Hector and slain the valiant son of Menoetius after he had done the Trojans much evil.

他们在斯卡亚门边奋战终日,当天即可攻下城堡,倘若福伊波斯·阿波罗不在前排里杀了墨诺伊提俄斯骁勇的儿郎――他已把特洛伊人捣得里哗拉――使赫克托耳争得荣光。

The optimal harvest time,preserving the green,boiling and technique of preserving the brittleness of Mongolia Scorzonera was studied.

研究了蒙古鸦葱的采收时机,护绿、烫漂和保脆技术,实验表明:选择叶龄在18~20d采收,在浓度为0.2%的碱溶液中浸泡30min保绿,烫漂温度98℃、时间叶柄1.5min、叶片0.5min,在烫漂液中加入0.15%的氯化钙保脆等措施,解决了产品速冻时的褪色、质地变软等问题。

In this case, the mother's way is to first change the milk powder, milk will not do so will dilute the concentration of tune, if they do not drink milk晾凉points, or nipple change, If this does not help your baby sleep就趁slaphappy continue to milk feeding.

在这种情况下,母亲的做法应该是,先改换奶粉,不行的话将牛奶浓度调点,如果还不喝就把牛奶晾凉点,或者将奶嘴换一换,如果还是不行就趁孩子睡得糊里糊涂的把奶喂下去。

Blend this mixture until it becomes soupy and even.

把這些混合攪拌直到成湯或更

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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。

There is no differences of cell proliferation vitality between labeled and unlabeled NSCs.

双标记神经干细胞的增殖、分化活力与未标记神经干细胞相比无改变。