In-situ time-resolved Raman spectroscopy(TRRS)has been applied on studies of electrochemical adsorption of thiocyanate at silver electrode during potential cycles and potential step.It is shown that some dynamic infor...In-situ time-resolved Raman spectroscopy(TRRS)has been applied on studies of electrochemical adsorption of thiocyanate at silver electrode during potential cycles and potential step.It is shown that some dynamic information about the adsorption and desorption processes can be obtained.展开更多
The properties of the triplet excited state of [60]fullerene-containing cyclic sulphoxide have been investigated by time-resolved absorption spectroscopy. Transient absorption bands of [60]fullerene-containing cyclic...The properties of the triplet excited state of [60]fullerene-containing cyclic sulphoxide have been investigated by time-resolved absorption spectroscopy. Transient absorption bands of [60]fullerene-containing cyclic sulphoxide showed two decay-components, which were attributed to triplet excited states of different spin multiplicity. The properties of photoexcited states of [60]fullerene-containing cyclic sulphoxide are also reported.展开更多
Film coating is an important unit operation to produce solid dosage forms,thereby,the monitoring of this process is helpful to find problems in time and improve the quality of coated products.Traditional methods adopt...Film coating is an important unit operation to produce solid dosage forms,thereby,the monitoring of this process is helpful to find problems in time and improve the quality of coated products.Traditional methods adopted to monitor this process include measurement of coating weight gain,performance of disintegration and dissolution test,etc.However,not only do these methods cause destruction to the samples,but also consume time and energy.There have recently emerged the applications of process analytical technologies(PAT)on film coating,especially some novel spectroscopic and imaging technologies,which have the potential to real-time track the progress in film coating and optimize production efficiency.This article gives an overview on the application of such technologies for film coating,with the goal to provide a reference for the further researches.展开更多
The terahertz（THz）region of the electromagnetic spectrum,spanning the range between 0.1THz and 10THz,has experienced a renaissance due to technological developments in sources and detectors.The terahertz time domain...The terahertz（THz）region of the electromagnetic spectrum,spanning the range between 0.1THz and 10THz,has experienced a renaissance due to technological developments in sources and detectors.The terahertz time domain spectroscopy（THz-TDS）system is by far one of the most important methods to generate and detect the THz wave.In physics,THz-TDS is a spectroscopic technique in which the properties of a material are probed with shortpulses of terahertz radiation.展开更多
目的:制备阿司匹林磷脂复合物(ASP-PC)并进行表征。方法:以ASP与PC的复合率为指标,采用单因素试验筛选ASP-PC的制备方法、PC种类、溶剂种类、反应时间、反应温度、溶剂体积和药脂比,并进行验证。采用紫外分光光度法、热重分析法、X射线...目的:制备阿司匹林磷脂复合物(ASP-PC)并进行表征。方法:以ASP与PC的复合率为指标,采用单因素试验筛选ASP-PC的制备方法、PC种类、溶剂种类、反应时间、反应温度、溶剂体积和药脂比,并进行验证。采用紫外分光光度法、热重分析法、X射线衍射法和傅里叶红外光谱分析对所制ASP-PC进行表征。结果:采用磁力搅拌-冷凝回流法,药物-大豆磷脂比为1∶3(mol/mol),溶剂为四氢呋喃(50 m L),58℃下反应3 h,所制ASP-PC的平均复合率为83.52%(RSD=1.16%,n=3)。与ASP、ASP和PC的物理混合物比较,紫外光谱显示ASP-PC没有出现新的吸收峰;热重分析、X射线衍射分析和傅里叶红外光谱分析显示ASP-PC中的ASP与PC发生了相互作用,且ASP-PC在0~300℃范围内质量变化较小。结论:成功制得ASP-PC,其中ASP与PC复合成功,但仍有微量ASP以晶体形式存在。展开更多
采用乙醇浸提法提取芜菁种子中的黄酮类化合物。结果表明:浸提提取的最佳条件是50 ml 70%乙醇在70℃下提取2 h。本试验采用分光光度法,以芦丁标准品测定芜菁种子提取物中总黄酮的含量,总黄酮含量为2.01%.方法简便,快速,重现性好,可作为...采用乙醇浸提法提取芜菁种子中的黄酮类化合物。结果表明:浸提提取的最佳条件是50 ml 70%乙醇在70℃下提取2 h。本试验采用分光光度法,以芦丁标准品测定芜菁种子提取物中总黄酮的含量,总黄酮含量为2.01%.方法简便,快速,重现性好,可作为检测芜菁种子提取物中黄酮含量的一种手段。展开更多
文摘In-situ time-resolved Raman spectroscopy(TRRS)has been applied on studies of electrochemical adsorption of thiocyanate at silver electrode during potential cycles and potential step.It is shown that some dynamic information about the adsorption and desorption processes can be obtained.
文摘The properties of the triplet excited state of [60]fullerene-containing cyclic sulphoxide have been investigated by time-resolved absorption spectroscopy. Transient absorption bands of [60]fullerene-containing cyclic sulphoxide showed two decay-components, which were attributed to triplet excited states of different spin multiplicity. The properties of photoexcited states of [60]fullerene-containing cyclic sulphoxide are also reported.
基金supported by National Natural Science Foundation of China(81202476)Medical Research Foundation of Guangdong Province(B2012079).
文摘Film coating is an important unit operation to produce solid dosage forms,thereby,the monitoring of this process is helpful to find problems in time and improve the quality of coated products.Traditional methods adopted to monitor this process include measurement of coating weight gain,performance of disintegration and dissolution test,etc.However,not only do these methods cause destruction to the samples,but also consume time and energy.There have recently emerged the applications of process analytical technologies(PAT)on film coating,especially some novel spectroscopic and imaging technologies,which have the potential to real-time track the progress in film coating and optimize production efficiency.This article gives an overview on the application of such technologies for film coating,with the goal to provide a reference for the further researches.
文摘The terahertz（THz）region of the electromagnetic spectrum,spanning the range between 0.1THz and 10THz,has experienced a renaissance due to technological developments in sources and detectors.The terahertz time domain spectroscopy（THz-TDS）system is by far one of the most important methods to generate and detect the THz wave.In physics,THz-TDS is a spectroscopic technique in which the properties of a material are probed with shortpulses of terahertz radiation.
文摘目的:制备阿司匹林磷脂复合物(ASP-PC)并进行表征。方法:以ASP与PC的复合率为指标,采用单因素试验筛选ASP-PC的制备方法、PC种类、溶剂种类、反应时间、反应温度、溶剂体积和药脂比,并进行验证。采用紫外分光光度法、热重分析法、X射线衍射法和傅里叶红外光谱分析对所制ASP-PC进行表征。结果:采用磁力搅拌-冷凝回流法,药物-大豆磷脂比为1∶3(mol/mol),溶剂为四氢呋喃(50 m L),58℃下反应3 h,所制ASP-PC的平均复合率为83.52%(RSD=1.16%,n=3)。与ASP、ASP和PC的物理混合物比较,紫外光谱显示ASP-PC没有出现新的吸收峰;热重分析、X射线衍射分析和傅里叶红外光谱分析显示ASP-PC中的ASP与PC发生了相互作用,且ASP-PC在0~300℃范围内质量变化较小。结论:成功制得ASP-PC,其中ASP与PC复合成功,但仍有微量ASP以晶体形式存在。
