A novel Hadamard transform(HT) microscopic image detection system which can generate 511× 512 pixel format images of fluorescence or absorptive light for small samples has been developed, when spatial multiplexin...A novel Hadamard transform(HT) microscopic image detection system which can generate 511× 512 pixel format images of fluorescence or absorptive light for small samples has been developed, when spatial multiplexing is performed with a 511 slit one dimensional Hadamard mask and a highly sensitive linear CCD. The weak native fluorescence imaging for Zephyranthes candida (Lindl.) Herb. Pollen cells can be realized within 1 min. The spatial resolution of 0 6 μm per pixel has been achieved with a 40× objective. The imaging speed, sensitivity and spatial resolution are satisfactory, hence the system has a good application prospect in cell biology and medicine. Some factors that influence imaging speed and quality have been discussed preliminarily.展开更多
目的建立微型近红外光谱仪测定硫酸羟氯喹颗粒水分含量的定量分析模型。方法真空干燥和加湿实验改变硫酸羟氯喹颗粒的含水量范围,采用标准正则变换(standard normal variate transformation,SNV)、二阶导数(second derivative,2nd Deriv...目的建立微型近红外光谱仪测定硫酸羟氯喹颗粒水分含量的定量分析模型。方法真空干燥和加湿实验改变硫酸羟氯喹颗粒的含水量范围,采用标准正则变换(standard normal variate transformation,SNV)、二阶导数(second derivative,2nd Derivative)和Karl Norris平滑的光谱预处理方法,选择617~1 068 nm波段,运用偏最小二乘回归(partial least squares,PLS)建立近红外定量分析模型。结果所建模型的校正误差均方根(root mean square error of calibration,RMSEC)为0.178,相关系数Rc为0.991 6,预测误差均方根(root mean square error of prediction,RMSEP)为0.197,相关系数Rp为0.989 6,验证集标准偏差与预测标准偏差的比值(ratio of standard deviation of the validation set to error of prediction,RPD)为6.95,方法学验证中准确度和重复性符合要求。结论微型近红外光谱仪应用于测定硫酸羟氯喹颗粒的含水量是可行的,为微型近红外光谱仪应用于药物的在线干燥过程提供了实验基础。展开更多
文摘A novel Hadamard transform(HT) microscopic image detection system which can generate 511× 512 pixel format images of fluorescence or absorptive light for small samples has been developed, when spatial multiplexing is performed with a 511 slit one dimensional Hadamard mask and a highly sensitive linear CCD. The weak native fluorescence imaging for Zephyranthes candida (Lindl.) Herb. Pollen cells can be realized within 1 min. The spatial resolution of 0 6 μm per pixel has been achieved with a 40× objective. The imaging speed, sensitivity and spatial resolution are satisfactory, hence the system has a good application prospect in cell biology and medicine. Some factors that influence imaging speed and quality have been discussed preliminarily.
文摘目的建立微型近红外光谱仪测定硫酸羟氯喹颗粒水分含量的定量分析模型。方法真空干燥和加湿实验改变硫酸羟氯喹颗粒的含水量范围,采用标准正则变换(standard normal variate transformation,SNV)、二阶导数(second derivative,2nd Derivative)和Karl Norris平滑的光谱预处理方法,选择617~1 068 nm波段,运用偏最小二乘回归(partial least squares,PLS)建立近红外定量分析模型。结果所建模型的校正误差均方根(root mean square error of calibration,RMSEC)为0.178,相关系数Rc为0.991 6,预测误差均方根(root mean square error of prediction,RMSEP)为0.197,相关系数Rp为0.989 6,验证集标准偏差与预测标准偏差的比值(ratio of standard deviation of the validation set to error of prediction,RPD)为6.95,方法学验证中准确度和重复性符合要求。结论微型近红外光谱仪应用于测定硫酸羟氯喹颗粒的含水量是可行的,为微型近红外光谱仪应用于药物的在线干燥过程提供了实验基础。
