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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。

Numerical experiments declare that those filled functions have fairish calculated performance.

理论证明分析和数值实验的结果表明,此类填充函数具有较好计算性质。

The holders of 6.2 per cent stake in the company Yahoo Gedeng Ke Luo Fute leaders Monday to the Yahoo by re-voting results.

这家持有6.2%雅虎股份的公司领导人戈登。柯罗福特周一时向雅虎提出重新计算投票结果。

The simulation results for three testing functions validate the high speed and precision of the AMSCIOA with mutative scale.

应用该算法对3个测试函数进行优化计算得到了比较满意的结果。

AQMC algorithm progresses in the nondifferentiable optimization. First, we develop the local search such that the search direction, search radius and number of search points are adjusted according to the previous search result.

首先改进了局部搜索算法,使得搜索方向,搜索半径和搜索所计算的函数值个数根据已有的搜索结果而自适应调整。

In our calculation, it is found that the nonlocal potentials can be suitably used and bring about reasonable results.

在计算过程中我们直接采用了非定域势,得到了合理的结果。

Subsequently, tryptic peptide mapping was performed by high performance liquid chromatography on a C 8 column with tandem UV and MS detection.

结果 分子量测定值与理论值不符,质谱解析表明样品中存在 3个氨基酸变异现象,由此计算的分子量与测定值吻合。

This method is simple and easy. and can get better results under some circumstances.

这种方法计算简单,使用方便,对某些情况较好的结果。

For halos in the ground states, 28S and 45S are choused as examples, two-proton halo in 28S and one-neutron halo in 45S are suggested.

对于奇特核中的丰中子晕,选择了~(28)S和~(45)S计算,结果表明指出~(28)S可能存在一个双质子晕,~(45)S可能存在一个单中子晕。

The combinations of crucibles with different thermal properties were investigated.

本文对不同坩埚热物性组合时计算得到的结果进行了比较。

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And discuss some key point of integrated management system design, include hazard identification and risk assessment and risk control in the occupational health and safety management, the measure of satisfaction target of customer, the flawlessness of law system, the integration of the integrated management system and enterprise standardization system, unify lead institution and work orgnization, integreted internal audit and integrated management review.

同时,论述了一体化管理体系构建中的几个主要问题,包括职业健康安全管理中的危险源辨识、风险评价和风险控制、顾客满意度的科学监测、法律、法规体系的完善、一体化管理体系与企业标准化体系的有机结合、统一的领导机构和工作机构、一体化的内部审核和管理评审。

Deepwater Taranaki is investigated for its petroleum potential, using all available seismic data tied to shallow-water wells.

运用与浅水井相关的现有全部震波探测数据考察了深海区塔拉纳基盆地的油藏前景。

If you're huffing and puffing at any point during the run, slow down and make sure you can take deep breathes.

如果你任何时候在跑步过程中气喘如牛,降低速度并且确保你能够深呼吸。