核心节能复合导电材料的制备涉及复合材料的改进。
A preparation of core energy saving compound conductive material relates to improvement of compound material.
改进的方法制备收率高，反应操作简单，更有利于实验教学。
This procedure is of high yield and simple operation and benefit to enhance teaching effect.
对药用植物牛膝的染色体制备技术进行了初步研究与改进。
This study was carried out with root tips of Achyranthes bidentata BI.
结果表明，使用改进的新工艺完全可以制备出质量符合要求的产品。
Results showed that carboxymethylpachymaran from the new technology was fine in quality.
结果表明，使用改进的新工艺完全可以制备出质量符合要求的产品。
Results showed that carboxymethylpachymaran from the new technology was fine in quality.
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