In light of the problem of radiolysis of the solvent system in PUREX(plutonium uranium recovery by extraction) process, γ and α irradiation stabilities of tributylphosphate(TBP)/n-dodecane/nitric acid system were st...In light of the problem of radiolysis of the solvent system in PUREX(plutonium uranium recovery by extraction) process, γ and α irradiation stabilities of tributylphosphate(TBP)/n-dodecane/nitric acid system were studied using60 Co γ-rays and α particles from238 Pu. The main degradation products, dibutyl phosphate(HDBP)and monobutyl phosphate(H2MBP) were detected by the gas chromatography-mass spectrometry(GC-MS),and the degradation products that could not be easily removed by the washing procedure were measured by the Pu retention. Effects of the absorbed dose, the HNO3 concentration, and the cumulative dose on the irradiation stability of the systems were investigated. The yields of HDBP, H2 MBP and the Pu retention increased with the absorbed dose. The HNO3 concentration affected significantly on the yield of HDBP, but had little impact on the output of H2 MBP and Pu retention. For a similar absorbed dose, the Pu retention of the solvent by alpha irradiation is larger than that by gamma irradiation.展开更多
To evaluate the extraction process of Huidouba polysaccharides(HDBP)and its anti-diabetic activity,this study focused on the two contents as follows:extraction process of HDBP,which was optimized by orthogonal experim...To evaluate the extraction process of Huidouba polysaccharides(HDBP)and its anti-diabetic activity,this study focused on the two contents as follows:extraction process of HDBP,which was optimized by orthogonal experiments using the extraction ratio of HDBP for the index;and bioactivity evaluation of HDBP on streptozotocin-induced diabetic rat model based on the histological,biochemical and enzyme linked immunosorbent assay(ELISA)method for histological observation,physiological and biochemical index such as fasting blood glucose(FBG),nitric oxide(NO),malondialdehyde(MDA),super oxide dismutase(SOD)and insulin level detection in pancreas tissue respectively.The results showed that HDBP extraction ratio was the highest under following conditions:the extraction temperature at 90℃,the extraction time of 1.5 h,and the solid-liquid ratio at 1:10.Compared with the normal control group and the model group,histological observation,physiological and biochemical index and insulin level in pancreas tissue significantly increased and FBG significantly decreased according to the dosage administrated.HDBP affected Streptozotocin-induced diabetic rats.展开更多
基金Supported by the Special Fund of Central University Basic Scientific Research Fee(No.HEUCFD1415)
文摘In light of the problem of radiolysis of the solvent system in PUREX(plutonium uranium recovery by extraction) process, γ and α irradiation stabilities of tributylphosphate(TBP)/n-dodecane/nitric acid system were studied using60 Co γ-rays and α particles from238 Pu. The main degradation products, dibutyl phosphate(HDBP)and monobutyl phosphate(H2MBP) were detected by the gas chromatography-mass spectrometry(GC-MS),and the degradation products that could not be easily removed by the washing procedure were measured by the Pu retention. Effects of the absorbed dose, the HNO3 concentration, and the cumulative dose on the irradiation stability of the systems were investigated. The yields of HDBP, H2 MBP and the Pu retention increased with the absorbed dose. The HNO3 concentration affected significantly on the yield of HDBP, but had little impact on the output of H2 MBP and Pu retention. For a similar absorbed dose, the Pu retention of the solvent by alpha irradiation is larger than that by gamma irradiation.
基金Supported by the Funding from the Science and Technology Training Plan Project of Sichuan Province(2016KZ0007)Veterinary Medicine Discipline Program of Southwest University for Nationalities(2014XWD-S0906)the Fundamental Research Funds for the Central Universities of Southwest Minzu University(2017NZYQN38)
文摘To evaluate the extraction process of Huidouba polysaccharides(HDBP)and its anti-diabetic activity,this study focused on the two contents as follows:extraction process of HDBP,which was optimized by orthogonal experiments using the extraction ratio of HDBP for the index;and bioactivity evaluation of HDBP on streptozotocin-induced diabetic rat model based on the histological,biochemical and enzyme linked immunosorbent assay(ELISA)method for histological observation,physiological and biochemical index such as fasting blood glucose(FBG),nitric oxide(NO),malondialdehyde(MDA),super oxide dismutase(SOD)and insulin level detection in pancreas tissue respectively.The results showed that HDBP extraction ratio was the highest under following conditions:the extraction temperature at 90℃,the extraction time of 1.5 h,and the solid-liquid ratio at 1:10.Compared with the normal control group and the model group,histological observation,physiological and biochemical index and insulin level in pancreas tissue significantly increased and FBG significantly decreased according to the dosage administrated.HDBP affected Streptozotocin-induced diabetic rats.
