The vapor phase concentration of durene could be adjusted by the self-made adjustor.
自制物料气相浓度调控仪能很好地调控气相中均四甲苯
浓度,具有推广应用价值。
The vapor phase concentration of durene could be adjusted by the self-made adjustor.
自制物料气相浓度调控仪能很好地调控气相中均四甲苯
浓度,具有推广应用价值。
The structure and working principle of the devices for melting point measurement by means of thin film comparative method of cryoscopy were introduced.
介绍凝固下降薄层比较法测量
标准物质
测量装置
构成与工作原理。
Nonnatural amino acid 3-(4-thiazolyl)-D,L-alanine hydrochloride and its four intermediates were synthesized, their structures were detenmined by IR,NMR,elementary analysis and melting point.
合成了非天然氨基3-(4-噻唑基)-D,L-丙氨
盐
盐以及三个中间体,其结构分别通过红外光谱、核磁共振、元素分析、
等测试手段得到确证。
The paper is made by the dividable composite fibers(DCF) and ES fibers, the proportioning of the two kinds of fibers effects the absorption and tensile strength of the paper distinctly.
采用分裂纤维和低纤维抄造纸页,纤维配比
改变对纸页
吸收及强度性能有很大
影响。
Rapid growth of “mother dendrites” in a given location of a melt at just below the liquidus temperature, that growth being the result of rapid heat extraction from the melt, or from recalescence.
在特,以低于液相线
温度快速生成“母晶枝”,这是使
融金属或复辉快速散热
结果。
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