weight differential

The products were characterized by nuclear magnetic resonance, differential scanning calorimetry, gel permeation chromatograph, dynamic mechanical analysis and thermogravimetry. The results indicated that the products were high molecular weight atactic polypropylene which showed dynamic mechanical behavior of rubber and good thermal stability.

用核磁共振碳谱、差示扫描量热法、动态力学分析等测试表明，该产物为高分子量无规聚丙烯（APP），呈现橡胶的动态力学行为，并具有良好热稳定性。

Use the results and methods of operator theory in the Krein space L2 ( I, w) ( indefinite inner product space) to investigate the spectrum of differential operators with indefinite weight function w;

二是利用完备的不定度规空间L w~2（Krein空间）内的算子理论和方法来研究和处理带有不定权函数的微分算子；

Method: We use sealed cotton swab to sample in cervix. We get the weight of secretion by differential subtract method then to detect the Uu by FQ-PCR.

方法对门诊的阴道炎患者，采用特制密封棉拭子宫颈管内取样，然后采用重量差减法，求出分泌物的重量，采用荧光定量PCR测定解脲脲原体。

This paper describes the measurement of Second Virial coefficients ( A2) and spe-cific refractive index increment ( dn/ dc) of low molecular weight heparines by low angle laser light scattering photometer ( LALLS) and laser differential refractometer.

用激光小角光散射仪（LALLS）和激光示差折射仪（KMX-16），分别测定了低分子肝素的第二维利系数（A2）和折光指数浓度增量（dn/dc）。

Thermal gravimetric analysis ( TG) and differential thermal analysis ( DAT) showed that the weight loss was caused by the release of the absorbed water and the decomposition of Zr ( OH) 4 gel.

DTA－TG结果表明，吸附水的释放和Zr（OH）4。凝胶的热分解分别引起失重；