specific-element method

The experimental results indicated that the specific retention volume method through gas chromatography was easy to be used to evaluate non aqueous solvents for recovery of maleic anhydride and the difference between theoretical yield and the industrial yield of maleic anhydride was only 0.58%.

实验结果表明，气相色谱比保留体积法评选顺丁烯二酸酐非水回收溶剂简便易行，与已知工业化数据仅相差0.58%。

Determination of Specific Thermal Capacitance of Mixed Crude and Its Calculation Method

混合原油比热容的测定及计算方法

The heavy liquid separation with temperature changing has been applied to separate minerals of muscovite, biotite, sanidine and quartz to obtain several fractions with respect to specific gravity difference. All of them were dated by conventional Rb-Sr isochron method.

报道了应用重液变温分离法分离白云母、黑云母、透长石和石英等单矿物，进行铷锶等时线年龄测定的研究结果。

Theoretical specific impulse for two-phase flow in nozzle of rocket-ramjet engine& a simple estimation method

火箭冲压发动机喷管的两相流动理论比冲&一种简单估算方法

Synthetic method and stabilization of alpha-AlH_3 are reviewed. Introducing AlH_3 instead of aluminum powder in solid propellant. Theoretical specific impulse can be enhanced above 100N · s/ kg.

综述了三氢化铝晶体形态特征、α-AlH3的分子结构、合成方法及稳定化途径，在固体推进剂中用三氢化铝代替铝粉可使推进剂理论比冲可以增加100N·s/kg以上。