基于小波变换的适合Quick Bird遥感影像的融合方法

在分析了IHS变换、PCA变换、Brovey变换、加权融合、PMⅠ(Proposed methodⅠ)等一般融合方法的基础上,针对Quick Bird全色与多光谱影像的融合,提出了基于átrous小波变换的小波比值方法;然后通过目视判别、定量统计参数两种方法对各融合结果进行了比较.结果表明,小波分解层数为3的小波比值方法既很大程度地提高了空间纹理细节信息,又高度保持了原始多光谱影像的光谱特征,适合于Quick Bird遥感影像融合.     

反透析法测定阿奇霉素囊泡的包封率

建立阿奇霉素囊泡的包封率测定方法.以紫外分光光度法为分析手段,采用反透析法测定阿奇霉素囊泡的包封率.反透析法透析平衡时间为8h,游离药物的绝对回收率符合要求.该方法测得自制阿奇霉素囊泡的平均包封率为92.51％±0.56％,10h内没有渗漏,方法重现性好.该法操作准确、简便,可用于测定阿奇霉素囊泡的包封率.     

Analysis of the Nucleoside Content of Cordyceps sinensis Using the Stepwise Gradient Elution Technique of Thin-Layer Chromatography

Nucleoside is the main class of active components in Cordyceps sinensis. Thin-layer chromatography (TLC) is one of the most commonly used methods in pharmacopoeias for analyzing chemical components of herbal medicine. Since the isocratic elution method cannot be applied successfully in TLC analysis for separating all the nucleoside components, the stepwise gradient elution has been developed in this work to separate eight nucleoside standards with success. In this way, quantitative analyses of the samples of Cordyceps sinensis were achieved via the proposed TLC procedure coupled with the scanning densitometric techniques of CAMAG and TLCQA methods for qualitative and quantitative analysis.     

间接法测定吴茱萸碱磷脂复合物的复合率

建立吴茱萸碱磷脂复合物复合率的测定方法。采用紫外分光光度法测定游离的吴茱萸碱的含量,从而计算吴茱萸碱磷脂复合物的复合率。结果表明,吴茱萸碱在225nm处有最大吸收,浓度在1.05—4.20μg.mL-1范围内与吸光度呈良好的线性关系,回归方程为：A=0.1776C＋0.006,r=0.9997;平均加标回收率为99.71%,RSD为1.26%（n=9）。该法操作简便、精密度好、结果准确可靠。     

吴茱萸碱磷脂复合物的含量测定

建立紫外分光光度法测定吴茱萸碱磷脂复合物含量的方法。以无水乙醇为空白,测定波长为225nm。结果表明,EVO在1.05—4.20μg.mL-1范围内吴茱萸碱的吸光度线性关系良好(r=0.9997),平均回收率为99.51%,RSD为0.72%(n=9)。本方法操作简便,灵敏度高,重现性好,能准确测定吴茱萸碱磷脂复合物中吴茱萸碱的含量。