Applied Immobilized algae bacteria (ABI) to remove ammonia of freshwater aquaculture wastewater. Temperature (T),PH,light intensity (I),dissolved oxygen (DO) and filling rate five factors plays important role in the p...Applied Immobilized algae bacteria (ABI) to remove ammonia of freshwater aquaculture wastewater. Temperature (T),PH,light intensity (I),dissolved oxygen (DO) and filling rate five factors plays important role in the process of ammonia nitrogen removal ,related data between ammonia removal and five factors was received through multi-factor orthogonal test,and established relations model between the five factor and nitrogen removal. The results show that five-factors had significant effect on AR,and the best combinations for removing AR was temperature 30 ℃,pH=7.0,light intensity 6 000 lux,dissolved oxygen 5.0 mg/L and the fill rate 10%. According to the experimental data,equation model was proposed and coefficient of determination R2 =0.864 8,P<0.05. Samples T-test was done between the model predictions and the actual measured values.Test results showed that the significant difference of overall mean value sig. (2-tailed) was 0.978 (P>0.05),it Shows that had no significant difference between model predictions and the actual measured value,and model had a high degree of fitting.展开更多
Background:Nitric oxide(NO)plays a significant role in physiological and pathological processes in the retina.In the Larginine-NO pathway,NO synthase(NOS)converts L-arginine to NO and L-citrulline.Increased NO product...Background:Nitric oxide(NO)plays a significant role in physiological and pathological processes in the retina.In the Larginine-NO pathway,NO synthase(NOS)converts L-arginine to NO and L-citrulline.Increased NO production,mediated by inducible NOS has been implicated in the pathogenesis of various vitreoretinal diseases.In the present study it is hypothesized that in rhegmatogenous retinal detachment(RRD),the production of NO pathway metabolites might be upregulated.Methods:Using high-pressure liquid chromatography citrulline,arginine and nitrite were measured in vitreous fluid of 93 eyes with RRD,nine eyes with a traction retinal detachment due to proliferative diabetic retinopathy(PDR),and in 49 control samples of vitreous fluid from eyes without retinal detachment.Results:The mean vitreous concentrations of citrulline and arginine were significantly increased in eyes with RRD(9.6± 4.3 and 97.3± 29.2;respectively)or in eyes with a traction retinal detachment(25.8± 10.3 and 130.7± 23.7;respectively)as compared to control eyes(7.1± 3.2 and 75.9± 18.1;respectively).The mean level of nitrite was also higher in vitreous fluid of patients with RRD(2.24± 1.4)or patients with a traction retinal detachment(2.21± 0.72)than in the controls(2.01± 0.72),although not significantly so.Conclusions:We found increased levels of NO pathway metabolites in the vitreous fluid of eyes with retinal detachment,which may reflect a possible role of NO in the pathogenesis of this disease.展开更多
基金Supported by the National Natural Science Foundation of China(No.30972260)~~
文摘Applied Immobilized algae bacteria (ABI) to remove ammonia of freshwater aquaculture wastewater. Temperature (T),PH,light intensity (I),dissolved oxygen (DO) and filling rate five factors plays important role in the process of ammonia nitrogen removal ,related data between ammonia removal and five factors was received through multi-factor orthogonal test,and established relations model between the five factor and nitrogen removal. The results show that five-factors had significant effect on AR,and the best combinations for removing AR was temperature 30 ℃,pH=7.0,light intensity 6 000 lux,dissolved oxygen 5.0 mg/L and the fill rate 10%. According to the experimental data,equation model was proposed and coefficient of determination R2 =0.864 8,P<0.05. Samples T-test was done between the model predictions and the actual measured values.Test results showed that the significant difference of overall mean value sig. (2-tailed) was 0.978 (P>0.05),it Shows that had no significant difference between model predictions and the actual measured value,and model had a high degree of fitting.
文摘Background:Nitric oxide(NO)plays a significant role in physiological and pathological processes in the retina.In the Larginine-NO pathway,NO synthase(NOS)converts L-arginine to NO and L-citrulline.Increased NO production,mediated by inducible NOS has been implicated in the pathogenesis of various vitreoretinal diseases.In the present study it is hypothesized that in rhegmatogenous retinal detachment(RRD),the production of NO pathway metabolites might be upregulated.Methods:Using high-pressure liquid chromatography citrulline,arginine and nitrite were measured in vitreous fluid of 93 eyes with RRD,nine eyes with a traction retinal detachment due to proliferative diabetic retinopathy(PDR),and in 49 control samples of vitreous fluid from eyes without retinal detachment.Results:The mean vitreous concentrations of citrulline and arginine were significantly increased in eyes with RRD(9.6± 4.3 and 97.3± 29.2;respectively)or in eyes with a traction retinal detachment(25.8± 10.3 and 130.7± 23.7;respectively)as compared to control eyes(7.1± 3.2 and 75.9± 18.1;respectively).The mean level of nitrite was also higher in vitreous fluid of patients with RRD(2.24± 1.4)or patients with a traction retinal detachment(2.21± 0.72)than in the controls(2.01± 0.72),although not significantly so.Conclusions:We found increased levels of NO pathway metabolites in the vitreous fluid of eyes with retinal detachment,which may reflect a possible role of NO in the pathogenesis of this disease.
