Objective:To optimize the extraction technology of radix scutellariae. Methods: The extraction of radix scutellariae was scanned by ultraviolet spectrophotometry from 200 to 400nm. The content of baicalin was determined by HPLC. The ultraviolet ab-sorption, baicalin content and extraction rate were used as the indices, and the optimal extraction conditions were investigated by single factor experiments and orthogonal design tests. Results: The optimal extraction conditions were as follows: the ethanol concentration was 60%, the solid-liquid ratio was 1∶40, ultrasound extraction time and temperature was 40 min and 60℃, respectively. Conclusion:The extraction of radix scutellariae has good sunscreen with promising ultraviolet absorption in UVB. Ultrasound extraction has high ex-traction yield with short time, which can be used to extract sun-screening constituents from radix scutellariae.

To establish the quality standard for Pingyou granules. Methods: Paeoniae radix, Carthamus tinctorius, Coicis semen and Nutgrass galingale rhizome were qualitatively identified by TLC. The content of peoniflorin was determined by HPLC. The separation was performed on a Lichrospher-C18 (250 mm × 4. 6 mm, 5 μm) column with the mobile phase of methanol-acetic acid (24∶76). The detection wavelength was 232nm. Results:Paeoniae radix, Carthamus tinctorius, Coicis semen and Nutgrass galingale rhizome could be identified by TLC without any interference from the negative control. The linear range of peoniflorin was 6. 560-104. 920 μg·ml-1(r=0. 999 9) with the average recovery of 98. 77%(RSD=2. 73%,n=9). Conclusion:The qualitative identifi-cation is specific and reproducible, and the quantitative method is simple, accurate and reliable, which can be used in the quality con-trol of Pingyou granules.

Objective To improve the quality standard of Qixue Shuangbu Oral Liquid;To provide guarantee for the quality of oral liquids.Methods HPLC was used to simultaneously determine the contents of paeoniflorin and icariin in the oral liquid. The determination was performed on a Agiltnt TC-C18 (2) column (250 mm × 4.6 mm, 5μm) with the mobile phase of acetonitrile and 0.1% H3PO4 gradient mode. The flow rate was 1.0 mL/min;the column temperature was set at 25℃; the detection wavelength was 232 nm.Results The linear ranges of paeoniflorin and icariin were obtained between 0.542-8.677μg (r=0.999 9) and 0.185-2.963μg (r=0.999 9), with the average recoveries (n=6) of 99.29% (RSD=1.06%) and 98.91% (RSD=1.97%), respectively.Conclusion This method is accurate and feasible, which can be used conveniently in quality control ofQixue Shuangbu Oral Liquid.

AIM: To study the current density of transient outward potassium current (I_(to)) in cells from the epicardial zone of the 1-week and 2-month infarcted rabbit heart. METHODS: Rabbits were infarcted by ligation of the left anterior descending coronary artery, 1 week as well as 2 months later, the single ventricular myocytes were isolated enzymatically from the infracted area of 1-week infracted rabbit heart (PMI-1 week) and 2-month infracted heart (PMI-2 months), region remote from the infracted zone of 2-month infracted heart (REM-2 months) and free wall of left ventricule from noninfarcted heart (CON). I_(to) was recorded using whole cell patch-clamp techniques. (RESULTS:) Membrane capacitance of myocytes in REM-2 months group was signifitantly larger than that in CON. I_(to)current density (at +60 mV) was significantly reduced in PMI-1 week [(7.5?2.4) pA/pF, n=12] and PMI-2 months [(10.6?4.1) pA/pF, n=18] compared with CON [(17.4?5.2) pA/pF, n=16], P

AIM: To study the effect of experimental acute necrotizing pancreatitis (ANP) on sodium and L-type calcium current in rat cardiomyocytes. METHODS: I Na and I Ca-L were recorded using whole cell patch-clamp techniques from left ventricular myocytes in ANP model established by retrograde injection of 3 5% sodium taurocholate 2 5 mL/kg into pancreatic duct. RESULTS: Peak I Na current density (at -30 mV) was significantly reduced in ANP [(12 45?2 26) pA/pF, n =16] compared with sham [(25 32?3 31) pA/pF, n= 14], P

Objective:To improve the quality standard of Tongsai Yinao oral liquids for the quality control. Methods: TLC was used for the qualitative identification of Rhizoma corydails, Rhizoma chuanxiong and Rhizoma acori tatarinowii. HPLC was used to sim-ultaneously determine the content of total ferulic acid in the oral liquids. The determination was performed on a Lichrospher-C18 (250 mm×4.6 mm,5 μm)column with the mobile phase of methanol-0.1% H3PO4(30∶70). The flow rate was 1.0 ml·min-1,the col-umn temperature was at 30℃, the detection wavelength was 321nm and the injection volume was 20μl. Results:The spots on the TLC plates were clear without the interference of negative control. The linear range of ferulic acid was obtained between 2. 24 and 35. 84 μg ·ml-1(r=0. 999 9), and the average recovery was 102. 54%(RSD=0. 85%, n=6). Conclusion:The improved method is accu-rate and feasible. It can be used very conveniently in the quality control.

AIM: To study the current density and function of Na + channel in cells from the epicardial border zone of the 1-week infarcted rabbit heart. METHODS: Rabbits were infarcted by ligation of the left anterior descending coronary artery. 1 week later, I Na was recorded using whole cell patch-clamp techniques in ventricular myocytes from infarcted heart(IZs) and compared with the I Na from noninfarcted heart(NZs). RESULTS: Peak I Na current density(at -30 mV) was significantly reduced in IZs(22 48?4 62 PA/PF, n= 14) compared with NZs(45 50?5 33 PA/PF, n= 12), P

Objective To establish method of the determination of aloe-emodin ,rhein ,emodin ,chrysophanol and physcion in Xinbaoshen tablet ,for the production of quality protection .Methods HPLC was performed on a Lichrospher-C18 column (250 mm × 4 .6mm ,5 μm)with the mobile phase of methanol-0 .1% H3 PO4 (70:30) .The flow rate was 1 .0 ml/min ,the col-umn temperature was at 35 ℃ and the detection wavelength was 254 nm .Results The linear rang of aloe-emodin ,rhein ,emod-in ,chrysophanol and physcion were obtained between 2 .30-18 .4 μg/ml ( r= 1 .0) ,2 .930-23 .44 μg/ml( r= 1 .0) ,5 .00-40 .0 μg/ml ( r=1 .0) ,14 .870-118 .96μg/ml( r= 0 .9998 ) and 7 .410-59 .28 μg/ml(r=0 .999 9) ,the average recoveries were 100 .16% ,102 .91% ,99 .76% ,100 .32% ,100 .44% ,RSD were 1 .58% ,1 .27% ,1 .67% ,1 .33% ,1 .03% (n=9) .Conclusion The improved method was accurate and feasible which could be used convenient in quality control .