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It includes the following steps: extract trivalent iron ion and divalent iron ion in water phase through organic extractant, get predecessor of; absterge it with secondary distilled water for2-3 times and get pure load metal predecessor of organic phase; mix organic phase of Mg2 and Fe3 with mol rate of 1:2 and introduce them into autoclave, add distilled water according to the rate of 3:1 or 4:1 of organic phase and water phase and airproof it, and then mix it fiercely, stripping with hydrothermal method at temperature between 200 degree C and 300 degree C and make them react for 2.5 hours; cool it to the room temperature under natural condition, separate liquid and centrifugalize it, absterge it with absolute alcohol for 2-3 times and dry it at temperature of 50 degree C for 30-180 minutes, then get product of magnesium ferrite.

包括如下步骤:通过有机萃取剂来萃取水相中的三价铁离子和二价镁离子,制得有机相前驱物;用二次蒸馏水洗涤2-3次,获得纯净的负载金属有机相前驱物;按照Mg 2 和Fe 3 摩尔比1∶2将有机相混合均匀后引入高压釜中,按照有机相与水相的比例为3∶1或4∶1加入蒸馏水,密封后,对溶液进行强力搅拌,水热反萃的温度在200-300℃之间反应2.5小时;自然冷却至室温,分液,离心分离,用无水乙醇洗涤2-3次,在50℃下干燥30-180分钟,得铁酸镁产品。

The result indicated that manganese chloride,acetylacetone,sodium hydroxide,were grinded for 15 mins at room temperature with the molar ratio of 1∶4∶1.8,the yield of manganese ac...

结果表明:氯化锰、乙酰丙酮、固体NaOH按1∶4∶1.8的摩尔比,在室温下研磨15 min所得产率最高,产率为68%,比传统液相法的产率(25%)高出43%。

Weaned pigs were exposed to cold environment (-3~3℃) for 24 h, and then moved into room temperature (15~18℃) to recover. Blood samples were collected to investigate the dynamic changes of adrenocorticotropic hormone and cortisol concentration.

断乳仔猪在-3~3℃低温条件下冷暴露24h,然后在15~18℃室温条件下恢复,检测血浆促肾上腺皮质激素和皮质醇的动态变化。

The results show pH between 4 and 6, room temperature around 20℃ could reach preferable adsorptive rate above 87%.

结果表明,pH=4~6,在室温20℃去除率可达到87%以上。

When AlCA reacts with HPAM, the lower the pH value of AlCA, the faster the rate of gelling reaction. At a certain pH value, the smaller the ratio of /, the slower the rate of the gelling reaction.

结果表明,柠檬酸铝在碱性条件下的稳定性、热稳定性及室温下的放置稳定性均随/的减小而提高,pH值过高或过低的柠檬酸铝均不能长期稳定存在。

The allylation reactions of aldehydes with allyl bromide were carried out in 76%~93% yields with Nd-SnCl2-H2O under ultrasound irradiation at room temperature for 50~60 min.

在Nd-SnCl2-H2O体系中,用烯丙基溴超声诱发下进行了一系列芳香醛的烯丙基反应,室温反应50~60min得76%~93%烯丙基化产物;而不用超声波时同样体系中搅拌3~4h高烯丙基醇产率为30%~86%。

The allylation reactions of aromatic aldehydes or ketones with allyl bromide were carried out in 60%~98% yields with Sn/H2O under ultrasound irradiation at room temperature for 45 min.

超声波作用下,Sn/H2O体系中,芳香醛酮在室温下进行烯丙基化反应,45min内得到60%~98%的烯丙基化产物

Bulk nanocrystalline Fe3Al materials containing mass-fraction of Ni as 5%, 10% and 15% were prepared by means of aluminothermic reaction. Compressive strength, bending strength and hardness of the materials were tested.

通过铝热反应熔化方法制备Ni质量分数分别为5%、10%、15%的块体纳米晶Fe3Al材料,研究材料在室温压缩和弯曲下的力学性能及硬度。

The synthesis of molecular beacon. CdTe QDs, DNA and EDC were added into the phosphate-buffered saline solution, reacted for 24 h at room temperature. In this period, carboxyl on the CdTe reacted with amido on DNA.

二、在PBS缓冲溶液中,将CdTe量子点、DNA和脱水剂EDC混合,于室温下反应24小时,CdTe量子点表面的羧基与DNA5'端的氨基缩合,合成分子灯塔探针。

The coordination process and structure between amidoxime modified polyacrylonitrile fiber and FeCl3 in aqueous solution were studied by using X-ray photoelectron spectroscopy, Fourier transforminfrared spectrometer, dynamic thermal mechanical analyzer, and electrical conductivity method, respectively.

室温条件下应用偕胺肟改性聚丙烯腈纤维与FeCl3反应制备了聚丙烯腈纤维铁配合物,并分别使用X射线光电子能谱、傅立叶红外光谱、动态热机械分析和电导法对Fe-AO-PAN进行了表征以确定其组成结构。

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