The above formula can be interpreted as follows. Part of the variance of XX is explained by the variance in X^MX^M. The remaining part is the variance in estimation error. In other words, if X^MX^M captures most of the variation in XX, then the error will be small. Note also that...
Formula: Dy2O3 CAS Number: 1308-87-8 Molecular Weight: 372.998 g/mol Density: 7.81 g/mL at 25°C Melting Point: 2408°C Particle size: 4~6 um Color: white and slightly hygroscopic powder Solubility: Moderately soluble in acid, not soluble in water. Moisture Sensitivity: slightly hy...
配置成浓度为0.1mg/mL的对照品溶液。 1.3供试品溶液的制备 精密称定藤黄健骨丸成品5g和中间体2.5g,分别置于50mL锥形瓶中,再精密量取甲醇25mL加 入使溶解,称定质量1,在功率为100W,频率为40kHz的条件下超声处理1h,放冷,称定质量2,用甲醇 补足2次称定的质量损失,摇匀,滤过,即得供试样品[11]。
Analyte Analyte Monotropein Monotropein Molecular Theoretical Mass MolFeocurmlarula Theoret(iDcaal )Mass Formula (Da) C16H22O11 389.1084 [M − H]− C16H22O11 389.1084 [M − H]− DDeaeacecetytyllaasspperuulloossiiddicic acid acidC16CH1262HO2121O11 38398.190.18048[4M[M− H−...
Fig. 1. Post-targeted screening strategy for the characterization of Qi-Yu-San-Long decoction (QYSLD)-related xenobiotics in rat urine samples. The red portions represent the molecular formula. First, a chemical compound database for QYSLD was established. Information on 166 constituents (name, ...
Note 3: The junction temperature (TJ, in °C) is calculated from the ambient temperature (TA, in °C) and power dissipation (PD, in Watts) according to the formula: TJ = TA + (PD • θJA), where θJA (in °C/W) is the package thermal impedance. Note 4: Dynamic supply ...
精密称定淫羊藿苷、松果菊苷、淫羊藿次苷Ⅱ、柚皮苷和毛蕊花糖苷对照品各1.0mg,加甲醇分别配置成浓度为0.1mg/mL的对照品溶液。 1.3供试品溶液的制备 精密称定藤黄健骨丸成品5g和中间体2.5g,分别置于50mL锥形瓶中,再精密量取甲醇25mL加入使溶解,称定质量1,在功率为100W,频率为40kHz的条件下超声处理1h,放冷,...