Cubic phase of Mg O nanoparticles were prepared by microwave-assisted combustion synthesis and investigated for the removal of toxic dyes like Congo Red(CR)and Trypan blue(TB).The crystallite size of the Mg O nanopart...Cubic phase of Mg O nanoparticles were prepared by microwave-assisted combustion synthesis and investigated for the removal of toxic dyes like Congo Red(CR)and Trypan blue(TB).The crystallite size of the Mg O nanoparticle was calculated to be 18 nm from XRD pattern.The sample was further characterized by FTIR,TGA and FESEM techniques.The dyes were subjected to prototypical batch adsorption process,including investigation of different parameters like Mg O dosage,dye concentration,solution pH,agitation speed and temperature.It was found that,0.2 g of Mg O NPs showed maximum removal efficiency for both the dyes(more than 98%),having 25 ppm of dye concentration at an acidic p H(3–4).The maximum loading capacity of Mg O NPs was obtained to be 136 mg/g and 132 mg/g for CR and TB,respectively.Different thermodynamic parameters like△G^(0),△H^(0)and△S^(0)were measured.The negative△H^(0)and the positive△S^(0)values for both the dyes correspond to an exothermic process and an increase in randomness of the adsorbent and dye.The isotherm analysis exhibited that the Freundlich model fits better to the experimental equilibrium data,suggesting heterogeneous surface of the nanoparticles.Whereas,the kinetic data revealed a pseudo 2 nd order rate for adsorption process.展开更多
AIM: To evaluate the safety of using 0.03% trypan blue under air for anterior capsule staining in cataract surgery.METHODS: The current study involved a retrospective analysis of the medical records of 86 patients wit...AIM: To evaluate the safety of using 0.03% trypan blue under air for anterior capsule staining in cataract surgery.METHODS: The current study involved a retrospective analysis of the medical records of 86 patients with vitreous hemorrhage, who underwent pars plana vitrectomy and cataract surgery.The patients were classified into two groups.The trypan blue group(n=45) comprised patients who underwent anterior capsule staining with 0.03% trypan blue under an air bubble.The control group(n=41) comprised of patients who underwent intracameral illuminator-assisted capsulorhexis.The status of endothelial cell density(ECD) in both the groups was analyzed.RESULTS: The trypan blue group displayed significant decline in ECD at 1 mo(7.91% loss, P<0.001) and 3 mo(9.65% loss, P<0.001) after the surgery, whereas no significant changes were observed in the control group.Moreover, the number of patients who did not display a postoperative decline in ECD was significantly higher in the control group(43.9%;18 patients) than in the trypan blue group(17.1%;7 patients, P=0.004).CONCLUSION: Anterior capsule staining with trypan blue under the air bubble would not be as safe as the intracameral illuminator.The ECD loss might be attributed to the air bubble rather than to the deleterious effects of 0.03% trypan blue.Further studies are required to clarify this.展开更多
We examined a new method for visualization of the primo vascular system in the rat brain involving lateral ventricle injection of trypan blue.Results showed that the primo vascular system in the lateral ventricles and...We examined a new method for visualization of the primo vascular system in the rat brain involving lateral ventricle injection of trypan blue.Results showed that the primo vascular system in the lateral ventricles and arachnoid mater of the brain were preferentially stained relative to blood vessels and fascia.The primo-vessels along blood vessels in the brain were clearly exhibited.In addition,the primo vascular system was evident between the fourth ventricle and the quadrigeminal cistern.Our experimental findings indicate that this new technique of lateral ventricle injection of trypan blue can visualize the primo vascular system in lateral ventricles and arachnoid mater of rats in situ.展开更多
In weak acid medium,a significant enhancement of resonance Rayleigh scattering(RRS) spectrum and new RRS spectra were observed when amikacin reacted with acid bisazo dye trypan blue and new RRS spectra with amaximum p...In weak acid medium,a significant enhancement of resonance Rayleigh scattering(RRS) spectrum and new RRS spectra were observed when amikacin reacted with acid bisazo dye trypan blue and new RRS spectra with amaximum peak at 717nm.The characteristic of RRS spectra,the optimum conditions for the reaction and the influencing factors were studied.The concentration of amikacin in the range of 0～6.24μg/mL is linear to the resonance scattering intensity(IRRS)at 717nm.The detection limit(3σ) of this method for Amikacin Sulphate is 9.2 ng·mL-1.Therefore,a simple,high sensitivity,good selectivity and repeat method for the determination of Amikacin Sulphate injection samples by RRS is developed with satisfactory results.展开更多
文摘Cubic phase of Mg O nanoparticles were prepared by microwave-assisted combustion synthesis and investigated for the removal of toxic dyes like Congo Red(CR)and Trypan blue(TB).The crystallite size of the Mg O nanoparticle was calculated to be 18 nm from XRD pattern.The sample was further characterized by FTIR,TGA and FESEM techniques.The dyes were subjected to prototypical batch adsorption process,including investigation of different parameters like Mg O dosage,dye concentration,solution pH,agitation speed and temperature.It was found that,0.2 g of Mg O NPs showed maximum removal efficiency for both the dyes(more than 98%),having 25 ppm of dye concentration at an acidic p H(3–4).The maximum loading capacity of Mg O NPs was obtained to be 136 mg/g and 132 mg/g for CR and TB,respectively.Different thermodynamic parameters like△G^(0),△H^(0)and△S^(0)were measured.The negative△H^(0)and the positive△S^(0)values for both the dyes correspond to an exothermic process and an increase in randomness of the adsorbent and dye.The isotherm analysis exhibited that the Freundlich model fits better to the experimental equilibrium data,suggesting heterogeneous surface of the nanoparticles.Whereas,the kinetic data revealed a pseudo 2 nd order rate for adsorption process.
文摘AIM: To evaluate the safety of using 0.03% trypan blue under air for anterior capsule staining in cataract surgery.METHODS: The current study involved a retrospective analysis of the medical records of 86 patients with vitreous hemorrhage, who underwent pars plana vitrectomy and cataract surgery.The patients were classified into two groups.The trypan blue group(n=45) comprised patients who underwent anterior capsule staining with 0.03% trypan blue under an air bubble.The control group(n=41) comprised of patients who underwent intracameral illuminator-assisted capsulorhexis.The status of endothelial cell density(ECD) in both the groups was analyzed.RESULTS: The trypan blue group displayed significant decline in ECD at 1 mo(7.91% loss, P<0.001) and 3 mo(9.65% loss, P<0.001) after the surgery, whereas no significant changes were observed in the control group.Moreover, the number of patients who did not display a postoperative decline in ECD was significantly higher in the control group(43.9%;18 patients) than in the trypan blue group(17.1%;7 patients, P=0.004).CONCLUSION: Anterior capsule staining with trypan blue under the air bubble would not be as safe as the intracameral illuminator.The ECD loss might be attributed to the air bubble rather than to the deleterious effects of 0.03% trypan blue.Further studies are required to clarify this.
基金the National Natural Science Foundation of China for Youths (General Program),No.30801464the National Basic Research Program of China (973 Program),No.2007CB512705the GIST Systems Biology Program of Korea in 2010
文摘We examined a new method for visualization of the primo vascular system in the rat brain involving lateral ventricle injection of trypan blue.Results showed that the primo vascular system in the lateral ventricles and arachnoid mater of the brain were preferentially stained relative to blood vessels and fascia.The primo-vessels along blood vessels in the brain were clearly exhibited.In addition,the primo vascular system was evident between the fourth ventricle and the quadrigeminal cistern.Our experimental findings indicate that this new technique of lateral ventricle injection of trypan blue can visualize the primo vascular system in lateral ventricles and arachnoid mater of rats in situ.
文摘In weak acid medium,a significant enhancement of resonance Rayleigh scattering(RRS) spectrum and new RRS spectra were observed when amikacin reacted with acid bisazo dye trypan blue and new RRS spectra with amaximum peak at 717nm.The characteristic of RRS spectra,the optimum conditions for the reaction and the influencing factors were studied.The concentration of amikacin in the range of 0～6.24μg/mL is linear to the resonance scattering intensity(IRRS)at 717nm.The detection limit(3σ) of this method for Amikacin Sulphate is 9.2 ng·mL-1.Therefore,a simple,high sensitivity,good selectivity and repeat method for the determination of Amikacin Sulphate injection samples by RRS is developed with satisfactory results.
