建立基于傅里叶变换红外光谱的香附水分、灰分和浸出物的快速测定模型。运用ANTARIS II FT-NIR Analyzer对60个香附样品进行近红外光谱采集。依照2015版药典中的方法测得60个香附样品的水分、灰分以及浸出物含量数据。运用TQ Analyst软...建立基于傅里叶变换红外光谱的香附水分、灰分和浸出物的快速测定模型。运用ANTARIS II FT-NIR Analyzer对60个香附样品进行近红外光谱采集。依照2015版药典中的方法测得60个香附样品的水分、灰分以及浸出物含量数据。运用TQ Analyst软件对所得香附的近红外光谱与试验所得的香附样品的水分、灰分以及浸出物含量数据建立快速测定的模型。所建立的香附水分、灰分、浸出物含量快速测定模型能较准确地对香附水分、灰分、浸出物含量进行识别与验证。其中香附水分含量模型R2为0.9027,校正集预测均方差(root mean square error of calibration,RMSEC)为0.774,预测集的预测均方差(root mean square error of prediction,RMSEP)为0.521;香附灰分含量模型R2为0.9884,RMSEC为0.0619,RMSEP为0.0585;香附浸出物含量模型R2为0.8903,RMSEC为1.25,RMSEP为2.33。所建立的模型能够较准确地实现香附水分、灰分、浸出物含量的快速测定。展开更多
Stevioside（1）, an ent-kaurene glycoside commercially extracted from Stevia rebaudiana Bertoni is used as a non-caloric sweetener for food in many countries. The increasing demand for low calory and natural food cont...Stevioside（1）, an ent-kaurene glycoside commercially extracted from Stevia rebaudiana Bertoni is used as a non-caloric sweetener for food in many countries. The increasing demand for low calory and natural food contributes to the increasing popularity of that glycoside. It has recently been demonstrated that stevioside and its derivatives have inhibitory effects on the inflammatory ear edema of mice and suppress the tumor-promoting effect in mouse skin.展开更多
Reaction of Cu with dibenzovi peroxide, 2-aminothiazol gave a binuclear complex [Cu_2 (C_6H_5COO)_4(C_3H_4N_2S)_2]. Crystal of the title compound is monoclinic system space group P2_1/n , M_r = 807. 84 with cell param...Reaction of Cu with dibenzovi peroxide, 2-aminothiazol gave a binuclear complex [Cu_2 (C_6H_5COO)_4(C_3H_4N_2S)_2]. Crystal of the title compound is monoclinic system space group P2_1/n , M_r = 807. 84 with cell parameters a= 10. 685 ( 1 ), b=19. 028(6), c=17. 046(9) , β=96. 49(33)￣°, Z=4, V=3443. 4, D_c=1. 565 g/cm￣-3, μ= 14. 078 cm￣-1, F(000)= 824. The final refinement with 3429 observed reflections is converged with R= 0. 046 and R_w=0. 053. X-ray crystal structure analysis revealed that each copper ion is coordinated by four bridging birfentate benzoate ligandsand one Zaminothiazol to form a binuclear molecule. In the crvstal, there are intramolecular hydrogen bonds N (1)- H ( 1 )-O(4) and N (3)- H (3)-O(1) with NO distance of 3. 005, N-H-O angle of 131. 9°.展开更多
文摘建立基于傅里叶变换红外光谱的香附水分、灰分和浸出物的快速测定模型。运用ANTARIS II FT-NIR Analyzer对60个香附样品进行近红外光谱采集。依照2015版药典中的方法测得60个香附样品的水分、灰分以及浸出物含量数据。运用TQ Analyst软件对所得香附的近红外光谱与试验所得的香附样品的水分、灰分以及浸出物含量数据建立快速测定的模型。所建立的香附水分、灰分、浸出物含量快速测定模型能较准确地对香附水分、灰分、浸出物含量进行识别与验证。其中香附水分含量模型R2为0.9027,校正集预测均方差(root mean square error of calibration,RMSEC)为0.774,预测集的预测均方差(root mean square error of prediction,RMSEP)为0.521;香附灰分含量模型R2为0.9884,RMSEC为0.0619,RMSEP为0.0585;香附浸出物含量模型R2为0.8903,RMSEC为1.25,RMSEP为2.33。所建立的模型能够较准确地实现香附水分、灰分、浸出物含量的快速测定。
基金Supported by the National Natural Science Foundation of China(No.20572103).
文摘Stevioside（1）, an ent-kaurene glycoside commercially extracted from Stevia rebaudiana Bertoni is used as a non-caloric sweetener for food in many countries. The increasing demand for low calory and natural food contributes to the increasing popularity of that glycoside. It has recently been demonstrated that stevioside and its derivatives have inhibitory effects on the inflammatory ear edema of mice and suppress the tumor-promoting effect in mouse skin.
文摘Reaction of Cu with dibenzovi peroxide, 2-aminothiazol gave a binuclear complex [Cu_2 (C_6H_5COO)_4(C_3H_4N_2S)_2]. Crystal of the title compound is monoclinic system space group P2_1/n , M_r = 807. 84 with cell parameters a= 10. 685 ( 1 ), b=19. 028(6), c=17. 046(9) , β=96. 49(33)￣°, Z=4, V=3443. 4, D_c=1. 565 g/cm￣-3, μ= 14. 078 cm￣-1, F(000)= 824. The final refinement with 3429 observed reflections is converged with R= 0. 046 and R_w=0. 053. X-ray crystal structure analysis revealed that each copper ion is coordinated by four bridging birfentate benzoate ligandsand one Zaminothiazol to form a binuclear molecule. In the crvstal, there are intramolecular hydrogen bonds N (1)- H ( 1 )-O(4) and N (3)- H (3)-O(1) with NO distance of 3. 005, N-H-O angle of 131. 9°.
