Background:Differential scanning calorimetry as a method of investigating and monitoring the kinetics of herbal medicinal plants.Some instrumental and experimental aspects are discussed.Methods:A brief survey is made ...Background:Differential scanning calorimetry as a method of investigating and monitoring the kinetics of herbal medicinal plants.Some instrumental and experimental aspects are discussed.Methods:A brief survey is made of herbal medicinal plants and results of differential scanning calorimetry studies are reviewed and this discussion is presented the effects of the instrumental conditions like heating rate and the sample conditions like sample particle size,sample mass,sample purity,sample stability in the melting region and property of impurities.Conclusion:This study suggests that application of differential scanning calorimetry to study the interpretation on herbal medicinal drugs.展开更多
Spectroscopy is a perfect analyzer to find the elements of all matter. The application of spectroscopy has been used to interpret the effect of antibiotics and other medicines after its life duration. This has been st...Spectroscopy is a perfect analyzer to find the elements of all matter. The application of spectroscopy has been used to interpret the effect of antibiotics and other medicines after its life duration. This has been studied by using the diabetics tablet melmet, expired for an year, to visualize the changes physically and chemically [1-3]. It has been observed that the occurrence of changes in color and reduction of smell and also the formation of new peaks and shift by XRD and UV, FTIR characterization respectively [4].展开更多
采用示差扫描量热法(DSC),X射线衍射(XRD)和振动样品磁强计(VSM)研究了Co对Nd Fe Al大块非晶合金的非晶形成能力,晶化行为和磁性能的影响。结果表明:加入Co元素后可以显著提高Nd Fe Al大块非晶合金的非晶形成能力以及提高合金的居里... 采用示差扫描量热法(DSC),X射线衍射(XRD)和振动样品磁强计(VSM)研究了Co对Nd Fe Al大块非晶合金的非晶形成能力,晶化行为和磁性能的影响。结果表明:加入Co元素后可以显著提高Nd Fe Al大块非晶合金的非晶形成能力以及提高合金的居里温度。Nd60Fe30-xAl10Cox(x=0、5、10)大块非晶合金在室温有较高的内禀矫顽力,具有硬磁性。内禀矫顽力随着Co含量的增加变化不大,但是饱和磁化强度和剩磁则随着Co含量的增加有所下降。Nd60Fe30-xAl10Cox(x=0、5、10)大块非晶合金具有的硬磁性能来自于非晶相。合金少量晶化后,磁性能变化不大。完全晶化后合金的硬磁性迅速消失。展开更多
文摘Background:Differential scanning calorimetry as a method of investigating and monitoring the kinetics of herbal medicinal plants.Some instrumental and experimental aspects are discussed.Methods:A brief survey is made of herbal medicinal plants and results of differential scanning calorimetry studies are reviewed and this discussion is presented the effects of the instrumental conditions like heating rate and the sample conditions like sample particle size,sample mass,sample purity,sample stability in the melting region and property of impurities.Conclusion:This study suggests that application of differential scanning calorimetry to study the interpretation on herbal medicinal drugs.
文摘Spectroscopy is a perfect analyzer to find the elements of all matter. The application of spectroscopy has been used to interpret the effect of antibiotics and other medicines after its life duration. This has been studied by using the diabetics tablet melmet, expired for an year, to visualize the changes physically and chemically [1-3]. It has been observed that the occurrence of changes in color and reduction of smell and also the formation of new peaks and shift by XRD and UV, FTIR characterization respectively [4].
文摘 采用示差扫描量热法(DSC),X射线衍射(XRD)和振动样品磁强计(VSM)研究了Co对Nd Fe Al大块非晶合金的非晶形成能力,晶化行为和磁性能的影响。结果表明:加入Co元素后可以显著提高Nd Fe Al大块非晶合金的非晶形成能力以及提高合金的居里温度。Nd60Fe30-xAl10Cox(x=0、5、10)大块非晶合金在室温有较高的内禀矫顽力,具有硬磁性。内禀矫顽力随着Co含量的增加变化不大,但是饱和磁化强度和剩磁则随着Co含量的增加有所下降。Nd60Fe30-xAl10Cox(x=0、5、10)大块非晶合金具有的硬磁性能来自于非晶相。合金少量晶化后,磁性能变化不大。完全晶化后合金的硬磁性迅速消失。
