目的基于超分子印迹模板自主识别理论,以茜草素为印迹模板功能单体进行猪不同组织的体外亲和色谱实验,验证茜草素归肝经机制,为创立中药归经体外研究方法奠定基础。方法将猪的肝、肺、舌、腹部肌肉、腿部肌肉等组织作固定相制成色谱柱,...目的基于超分子印迹模板自主识别理论,以茜草素为印迹模板功能单体进行猪不同组织的体外亲和色谱实验,验证茜草素归肝经机制,为创立中药归经体外研究方法奠定基础。方法将猪的肝、肺、舌、腹部肌肉、腿部肌肉等组织作固定相制成色谱柱,以PBS为流动相,进行归肝经的茜草素与归脾经的白砂糖（阴性对照）体外亲和色谱实验,采用HPLC测定各洗脱液中茜草素的量,UV法测定阴性对照组各洗脱液中葡萄糖的量,采用总量统计矩分析法获得各亲和色谱参数,获得色谱方程。结果茜草素在肝、肺、舌、腹部肌肉、腿部肌肉的色谱参数为C0：0.250 9～4.813 mg/m L;AUC：2.509～48.13 mg;VR：20.42～30.77 m L;σ2：282.6～532.7 m L2;H：14.13～26.63 m L;n：1.212～1.777;S：0.759 0～1.000。肝脏对茜草素的吸附性最强,腹部肌肉、腿部肌肉、肺、舌对茜草素的吸附作用依次减弱。阴性对照组中,肝脏对葡萄糖的吸附性并非最强。结论猪的肝器官对茜草素的吸附最大,两者存在超分子印迹模板亲合作用,这与茜草归肝经理论相吻合,由此可建立中药归经的体外初步研究方法。展开更多
建立以4种离子液体为萃取剂,结合超声辅助萃取,利用高效液相色谱法来测定茜草中茜草素与大叶茜草素素含量的方法。采用Purospher star RP-C18柱（4.6 mm×250 mm,5μm）,以B为甲醇、C为0.4%乙酸-水溶液为流动相,梯度洗脱,流速为0.85...建立以4种离子液体为萃取剂,结合超声辅助萃取,利用高效液相色谱法来测定茜草中茜草素与大叶茜草素素含量的方法。采用Purospher star RP-C18柱（4.6 mm×250 mm,5μm）,以B为甲醇、C为0.4%乙酸-水溶液为流动相,梯度洗脱,流速为0.85 m L·min-1,紫外检测波长为250 nm,柱温为室温。结果显示,茜草素和大叶茜草素的最佳萃取条件均为0.6 mo L·L-1的[HMIM]PF6甲醇溶液作为萃取剂,1∶80（g·m L-1）作为最佳固液比;茜草素进样量在0.01～0.04μg呈良好的线性关系（r=0.999 9）,平均回收率为97.12%;大叶茜草素进样量在0.41～1.35μg呈良好的线性关系（r=0.999 9）,平均回收率为98.10%。该实验采取环境友好型试剂作为萃取剂,提高了萃取效率,避免了有机溶剂对环境的污染,减少了对人体的伤害,操作简单,重复性好,对中药活性成分提取研究方法的创新有重要参考意义。展开更多
In order to decisively determine the adsorption selectivity of zirconium MOF(UiO-66) towards anionic versus cationic species, the adsorptive removal of the anionic dyes(Alizarin Red S.(ARS), Eosin(E), Fuchsin Acid(FA)...In order to decisively determine the adsorption selectivity of zirconium MOF(UiO-66) towards anionic versus cationic species, the adsorptive removal of the anionic dyes(Alizarin Red S.(ARS), Eosin(E), Fuchsin Acid(FA)and Methyl Orange(MO)) and the cationic dyes(Neutral Red(NR), Fuchsin Basic(FB), Methylene Blue(MB),and Safranine T(ST)) has been evaluated. The results clearly reveal a significant selectivity towards anionic dyes. Such an observation agrees with a plethora of reports of UiO-66 superior affinity towards other anionic species(Floride, PO_4^(3-), Diclofenac sodium, Methylchlorophenoxy-propionic acid, Phenols, CrO_4^(2-), SeO_3^(2-), and AsO_4^-). The adsorption process of ARS as an example has been optimized using the central composite design(CCD). The resultant statistical model indicates a crucial effect of both pH and sorbent mass. The optimum conditions were determined to be initial dye concentration 11.82 mg.L^(-1), adsorbent amount 0.0248 g, shaking time of 36 min and pH 2. The adsorption process proceeds via pseudo-second order kinetics(R^2= 0.999). The equilibrium data were fit to Langmuir and Tempkin models(R^2= 0.999 and 0.997 respectively). The results reveal an exceptional removal for the anionic dye(Alizarin Red S.) with a record adsorption capacity of400 mg·g^(-1). The significantly high adsorption capacity of UiO-66 towards ARS adds further evidence to the recently reported exceptional performance of MOFs in pollutants removal from water.展开更多
Black rockfish Sebastes schlegelii juveniles （30-40 mm total length） were immersed in a range of calcein （CAL） solutions at concentrations ranging from 50 to 250 mg/L and alizarin red S （ARS） solutions at concen...Black rockfish Sebastes schlegelii juveniles （30-40 mm total length） were immersed in a range of calcein （CAL） solutions at concentrations ranging from 50 to 250 mg/L and alizarin red S （ARS） solutions at concentrations ranging from 100 to 500 mg/L in filtered seawater （salinity 30） for 24 h. Fluorescent marks were detected in otoliths （sagittae, asteriscus）, scales, fin rays （dorsal, pectoral, ventral, anal, and caudal fin rays）, and fin spines （dorsal, ventral, and anal fin spines） after a 60-d growth experiment. With the exception of 50-100 rng/L CAL, acceptable marks were produced in the otoliths and fin spines by all concentrations of CAL and ARS. In particular, marks were clearly visible under normal light in the sagittae, asteriscus, and fin spines offish immersed in 200 500 mg/L, 300-500 rag/L, and 200-500 mg/LARS, respectively. Scales and fin rays had acceptable marks at much higher concentrations （≥50 mg/L CAL, ≥300 mg/L ARS for scales and ≥50 mg/L CAL,≥200 mg/L ARS for fin rays）. The mark quality was highest （i.e., acceptable marks were observed in all sampled structures after immersion marking） in fish immersed in 150-250 mg/L CAL or 300-500 mg/LARS. In addition, there was no significant difference in survival and growth of marked fish compared with controls 60 d post-marking （P〉0.05）.展开更多
文摘目的基于超分子印迹模板自主识别理论,以茜草素为印迹模板功能单体进行猪不同组织的体外亲和色谱实验,验证茜草素归肝经机制,为创立中药归经体外研究方法奠定基础。方法将猪的肝、肺、舌、腹部肌肉、腿部肌肉等组织作固定相制成色谱柱,以PBS为流动相,进行归肝经的茜草素与归脾经的白砂糖（阴性对照）体外亲和色谱实验,采用HPLC测定各洗脱液中茜草素的量,UV法测定阴性对照组各洗脱液中葡萄糖的量,采用总量统计矩分析法获得各亲和色谱参数,获得色谱方程。结果茜草素在肝、肺、舌、腹部肌肉、腿部肌肉的色谱参数为C0：0.250 9～4.813 mg/m L;AUC：2.509～48.13 mg;VR：20.42～30.77 m L;σ2：282.6～532.7 m L2;H：14.13～26.63 m L;n：1.212～1.777;S：0.759 0～1.000。肝脏对茜草素的吸附性最强,腹部肌肉、腿部肌肉、肺、舌对茜草素的吸附作用依次减弱。阴性对照组中,肝脏对葡萄糖的吸附性并非最强。结论猪的肝器官对茜草素的吸附最大,两者存在超分子印迹模板亲合作用,这与茜草归肝经理论相吻合,由此可建立中药归经的体外初步研究方法。
文摘建立以4种离子液体为萃取剂,结合超声辅助萃取,利用高效液相色谱法来测定茜草中茜草素与大叶茜草素素含量的方法。采用Purospher star RP-C18柱（4.6 mm×250 mm,5μm）,以B为甲醇、C为0.4%乙酸-水溶液为流动相,梯度洗脱,流速为0.85 m L·min-1,紫外检测波长为250 nm,柱温为室温。结果显示,茜草素和大叶茜草素的最佳萃取条件均为0.6 mo L·L-1的[HMIM]PF6甲醇溶液作为萃取剂,1∶80（g·m L-1）作为最佳固液比;茜草素进样量在0.01～0.04μg呈良好的线性关系（r=0.999 9）,平均回收率为97.12%;大叶茜草素进样量在0.41～1.35μg呈良好的线性关系（r=0.999 9）,平均回收率为98.10%。该实验采取环境友好型试剂作为萃取剂,提高了萃取效率,避免了有机溶剂对环境的污染,减少了对人体的伤害,操作简单,重复性好,对中药活性成分提取研究方法的创新有重要参考意义。
文摘In order to decisively determine the adsorption selectivity of zirconium MOF(UiO-66) towards anionic versus cationic species, the adsorptive removal of the anionic dyes(Alizarin Red S.(ARS), Eosin(E), Fuchsin Acid(FA)and Methyl Orange(MO)) and the cationic dyes(Neutral Red(NR), Fuchsin Basic(FB), Methylene Blue(MB),and Safranine T(ST)) has been evaluated. The results clearly reveal a significant selectivity towards anionic dyes. Such an observation agrees with a plethora of reports of UiO-66 superior affinity towards other anionic species(Floride, PO_4^(3-), Diclofenac sodium, Methylchlorophenoxy-propionic acid, Phenols, CrO_4^(2-), SeO_3^(2-), and AsO_4^-). The adsorption process of ARS as an example has been optimized using the central composite design(CCD). The resultant statistical model indicates a crucial effect of both pH and sorbent mass. The optimum conditions were determined to be initial dye concentration 11.82 mg.L^(-1), adsorbent amount 0.0248 g, shaking time of 36 min and pH 2. The adsorption process proceeds via pseudo-second order kinetics(R^2= 0.999). The equilibrium data were fit to Langmuir and Tempkin models(R^2= 0.999 and 0.997 respectively). The results reveal an exceptional removal for the anionic dye(Alizarin Red S.) with a record adsorption capacity of400 mg·g^(-1). The significantly high adsorption capacity of UiO-66 towards ARS adds further evidence to the recently reported exceptional performance of MOFs in pollutants removal from water.
基金Supported by the Special Fund for Agro-scientific Research in the Public Interest(No.201003068)the National Natural Science Foundation of China(Nos.31172447,41176117)
文摘Black rockfish Sebastes schlegelii juveniles （30-40 mm total length） were immersed in a range of calcein （CAL） solutions at concentrations ranging from 50 to 250 mg/L and alizarin red S （ARS） solutions at concentrations ranging from 100 to 500 mg/L in filtered seawater （salinity 30） for 24 h. Fluorescent marks were detected in otoliths （sagittae, asteriscus）, scales, fin rays （dorsal, pectoral, ventral, anal, and caudal fin rays）, and fin spines （dorsal, ventral, and anal fin spines） after a 60-d growth experiment. With the exception of 50-100 rng/L CAL, acceptable marks were produced in the otoliths and fin spines by all concentrations of CAL and ARS. In particular, marks were clearly visible under normal light in the sagittae, asteriscus, and fin spines offish immersed in 200 500 mg/L, 300-500 rag/L, and 200-500 mg/LARS, respectively. Scales and fin rays had acceptable marks at much higher concentrations （≥50 mg/L CAL, ≥300 mg/L ARS for scales and ≥50 mg/L CAL,≥200 mg/L ARS for fin rays）. The mark quality was highest （i.e., acceptable marks were observed in all sampled structures after immersion marking） in fish immersed in 150-250 mg/L CAL or 300-500 mg/LARS. In addition, there was no significant difference in survival and growth of marked fish compared with controls 60 d post-marking （P〉0.05）.
