查询词典 precipitates

The experimental results show that the mean particle size of griseofulvin precipitated by RESS is smaller than 1, 0μm, narrow distribution and 95％ fine particles is smaller than 1. 0μm. Increase of the pre-expansion pressure, the extraction temperature, the expansion chamber temperature, the spraying distance, the concentration of cosolvent and decrease of the nozzle diameter resulted in decrease of the particle size under the operating condition studied. Enhancement of the pre-expansion temperature resulted in increase of the particles size. The SEM of GF shows that the shape of original is atactic and a wide size distribution, but the microparticles obtained by RESS is reverse. Similar melting points and XRD patterns were observed for the original material and the precipitates obtained by RESS.

实验结果表明，用含夹带剂的RESS法制备的灰黄霉素微粒的平均直径在1μm左右，且分布均匀，95％微粒在1μm以下，仅用CO〓作为超临界流体制备的微粒与上述方法制备的微粒的平均直径和分布相似，只是产量太低，而用机械法制备的微粒平均直径在3μm左右且分布较宽；不同的过程参数对沉析微粒尺寸有不同的影响，预膨胀压力、膨胀室温度、溶解温度以及夹带剂浓度的提高或增大，均可使沉析微粒的直径变小；预膨胀温度提高，所得微粒的直径变大；喷射距离的增加，沉析微粒的直径变小；喷嘴直径越小，由此制得的微粒的直径就越小；根据实验结果还可知道，通过理论计算的马赫盘处微粒的直径可以较好地估计出膨胀室中收集到的微粒的直径。

Whereas, the tapetum of Zhenshan 97A disaggregated at the pollen mother cell stage, the nuclear membrane and the cell membrane disaggregated, the phenomena continued to the binucleate pollen stage. The cytoplasm of the tapetum cells of Zhenshan 97A deposited a few Ca^2＋ precipitates at the pollen mother cell stage.

珍汕97A绒毡层细胞从花粉母细胞时期开始，细胞质内有少量颗粒状的Ca^2＋沉淀；减数分裂时期，绒毡层细胞的内切向壁表面有大量大颗粒的Ca^2＋沉淀；单核花粉时期绒毡层细胞周围集聚一层Ca^2＋沉淀。

The para-/ortho- product isomer ratio is 6.2 for the nitration of chlorobenzene at 18℃ for 8h with n/n(NH4NO3)=5. The para-/ortho- product isomer ratio is 14.0 for the nitration of bromobenzene at 0℃ for 8h with n/n(NH4NO3)=5. The pars-product, p-nitrobromobenzene, from the nitration of bromobenzene in [HSO4] under 0℃ precipitates with 98% purity, which facilitates the separation of the pure isomert.

其中氯苯在18℃下反应8h，三氟乙酸酐/硝酸铵为4时产物的对邻比达到6.2，而溴苯在0℃下反应8h，TFAA/硝酸铵为5时产物的对邻比可达到14.0，并且生成的对硝基溴苯可以从反应液中析出，得到对硝基溴苯含量为98%的产物。

Using an in vitro assay, we show that matrix proteins induced formation of amorphous CaCO3 precipitates prior to their transformation into the calcitic crystalline form.

利用体外分析法发现，基质蛋白诱导碳酸钙形成非晶态析出相先于其形成钙质的结晶态。

It is shown that the microstructure of ZJ510L is refined by increasing the rolling pass and the cooling rate. The size range of final ferrite is about 5-6μm. Precipitates consist mainly of Al2O3, MnS, AlN and lots of carbonide particles, and their size range is about 20-150nm. It is verified that ZJ510L steel possesses a good combination of strength and plasticity due to its fine microstructure and has excellent formability and notched bar impact strength.

通过光学显微镜、透射电镜和力学性能实验研究表明：ZJ510L显微组织随著轧制道次和冷却速度的增加而细化，最终铁素体晶粒尺寸约为5~6μm；析出的第二相粒子主要为Al2O3，MnS和AlN以及大量的碳化物，尺寸大多在20~150nm之间；成品板强度和延伸率较高，并具有良好的成形性能和低温冲击韧性。

Carbonitride precipitates have significant effects on the mechanical properties of steels via grain refinement and precipitation hardening.

钢中的碳氮析出物通过细晶强化和析出强化方式对钢的力学性能有非常重要的作用。

The equilibrium volume fraction, chemical driving force of carbonitride precipitates, atom fraction of each element in austenite and carbonitride at different temperatures were calculated.

以析出热力学为基础，对Fe-Nb-C-N系统中奥氏体/碳氮化物的热平衡过程，计算了不同温度下碳氮化物析出相的平衡摩尔分数、化学驱动力、各组元的原子分数及奥氏体组分等。

On acidifying and extracting the precipitates which are insoluble in organic solution, their corresponding dibasic acids can be obtained.

单一的二元酸可用红外光谱法鉴定，而混合二元酸则必须在异丙醇-氨水展开剂中用纸层析来鉴别。

In the alloy of 9/1 Ni-to-Fe ratio, the fine β phase precipitates dispersively during aging which hardens the alloy.

同时机械铆接效应也起一定的作用；合理的工艺参数可获得高结合强度的合金镀层。

Fine precipitates which are dispersively distributed in the annealed steel sheets make dislocations pin.

退火板中析出物分布比较细小弥散，对位错产生钉扎，起到了强化超低碳BH钢基体的作用。

This paper designs the communication system of radio telescope FAST.

针对500m口径球面射电望远镜FAST分布式控制系统的特点完成了其通信系统的设计。

Political sheep's step-by-step a large number of fossils unearthed in the county soil Ma Ali after rural village in the middle of sallow pelitic siltstone.

步氏和政羊化石大量出土于广河县阿力麻土乡后山村，产于灰黄色泥质粉砂岩中。