Objective To investigate the influence of sodium fluoride(NaF)on alkaline phosphatase(ALP)activity and bone gla protein(BGP)synthesis in yellow ligament cells from different surgical simples in vitro.Methods The human...Objective To investigate the influence of sodium fluoride(NaF)on alkaline phosphatase(ALP)activity and bone gla protein(BGP)synthesis in yellow ligament cells from different surgical simples in vitro.Methods The human ligament cells展开更多
This study was carried out to observe the effects of sodium fluoride on acetylcholinesterase (AChE) activities in the cerebral synaptic membranes (SPM) and the peripheral red blood cells (RBC) of rats by in vivo and i...This study was carried out to observe the effects of sodium fluoride on acetylcholinesterase (AChE) activities in the cerebral synaptic membranes (SPM) and the peripheral red blood cells (RBC) of rats by in vivo and in vitro experiments. In the in vivo study,pregnant rats ingested ad libitum fluorinated drinking water (5, 15, 50 ppm F ) during their gestation and lactation. It was shown that the AChE activities of the SPM and peripheral RBCs in maternal rats exposed 5 ~ 50 ppm F for 60 days were elevated significantly by 30. 0 ~ 67. 6 % and 12. 5 ~ 31. 9 % in a dose-dependent manner, respectively. The AChE activities of their offspring 80 days after birth were also increaased (8. 7 ~ 28. 7 % for SPM and20. 6 ~ 32. 4 % for RBC). In contrast, the AChE activities of SPM in vitro were inhibited by 5. 0~ 50 .0 mmol F /L treatment in a time-and dose dependent manner. Analaysis with the Hanes plots suggested that the enzymesubstrate kinetics are consistent with a mixed type ofinhibition.展开更多
A new process for manufacturing organically compounded bentonite was devcloped successfully based on the organic intercalation andlayered structure of bentonitc.The main steps in the proposed process included wet sodi...A new process for manufacturing organically compounded bentonite was devcloped successfully based on the organic intercalation andlayered structure of bentonitc.The main steps in the proposed process included wet sodium activation of bentonite ore,organic com-pounding and high-pressure roll grinding.The optimum procedure is recommended as follows:5 mass%of sodium carbonate powderand 30 wt.%water are added to activate the bentonite ore for 24 h to prepare activated bentonice;0.5 wt.%of organic molecules are adiedinto the activated bentonite for organic compounding for 12 h:then,the high-pressure rollgrinding is followed to treat the organicallycompounded bentonice;:and finally,drying and fine prinding are performed for prenaring the final organically compounded bentoniteprodiuct with 10 wt.%moisture and 98% passing 0.074 mm.The obtained organically compounded bentonite was characterized usingan X-ray diffractometer,a scanning electron microscope and anX-ray photoelectron spectrometer.To confirm the effect of organicallycompounded bentonite on green balls,the pelletizing tests were carried out.The rexsults showed that high-pressure roll grinding can notonly enhance the ability of the crystal layer to hold the combined water.but also strengthen the intercalation compounding of the organicadditive,which is beneficial for the formation of a fiber-interlaced structure of the organically compounded bentonite and improvesthe quality index of the bentonite itself.Also,the organically compounded bentonite is helpiul to improve the indexes of green balls.展开更多
Cupric oxide （CuO） and copper-cuprous oxide （Cu-Cu2O） nanoparticles were prepared by a simple hydrothermal method for the synthesis of diethyi carbonate （DEC） from ethanol. During these syntheses, varying NaOH a...Cupric oxide （CuO） and copper-cuprous oxide （Cu-Cu2O） nanoparticles were prepared by a simple hydrothermal method for the synthesis of diethyi carbonate （DEC） from ethanol. During these syntheses, varying NaOH and glucose concentrations were applied to explore and pinpoint the active species. It was found that PdCl2/CuO and PdCI2/Cu-Cu2O both catalysts exhibited good thermal stability and morphology. The results of catalytic tests showed that the catalysts prepared with 5 mol/L NaOH show superior catalytic performances because of their lower extent of agglomeration. It is noteworthy that the PdC12/Cu-Cu2O catalysts were the most active, especially the PdCl2/Cu-Cu2O catalyst prepared with 10 mmol glucose and having a higher Cu2O concentration. In Pd（ll）-Cu（II） （PdCl2/CuO） catalysts, there is an induction period, during which Pd（II） is reduced to Pd（0）, that must occur prior to electron transfer between Pd and Cu, and this can slow the catalytic reaction. To further pinpoint the active species, PdCl2/Cu-Cu2O catalysts with different Cu2O contents were prepared by controlling the dosages of glucose. The maximum DEC yield obtained with these catalysts was 151.9 mg.g-1.h-1, corresponding to an ethanol conversion of 7.2% and 97.9% DEC selectivity on an ethanol basis. Therefore, it was concluded that Cu＋ was the active species in this catalytic system, possibly because a higher proportion of Cu＋ reduces the Pd2＋ concentration and limits the CO oxidation side reaction, thus increasing DEC selectivity. In addition, Cu＋ promotes electron transfer between Pd and Cu without an induction period, which could also promote the catalytic activity.展开更多
Objective: To explore the therapeutic effect and its mechanism mainly using traditional Chinese medicine (TCM) of Replenishing Qi and Nourishing Yin (RQNY) with a small dosage of Tapazole for treatment of Graves’ dis...Objective: To explore the therapeutic effect and its mechanism mainly using traditional Chinese medicine (TCM) of Replenishing Qi and Nourishing Yin (RQNY) with a small dosage of Tapazole for treatment of Graves’ disease (GD).Methods: The changes of thyroid function and the activity of sodium pump of human erythrocyte in the patients with Graves’ disease were observed and compared before and after treatment between the treated group (42 cases) by combining treatment mainly using TCM of RQNY and a small amount of Tapazole and a control group (42 cases) by Tapazole alone.Results: After treatment for half a year, one and two years, the serum levels of T3, T4 in above two groups were markedly decreased than those of before treatment, the therapeutic effect of treated group was superior to that of the control group. The activity of sodium pump in human erythrocyte in the GD patients was obviously higher than that of normal group and that of before treatment. After treatment for one and two years mainly by TCM or western medicine, the erythrocyte sodium pump activity was obviously lower than that of normal group and that of before treatment. The decrease of erythrocyte sodium pump activity in the treated group was markedly lower than that in the control group.展开更多
文摘Objective To investigate the influence of sodium fluoride(NaF)on alkaline phosphatase(ALP)activity and bone gla protein(BGP)synthesis in yellow ligament cells from different surgical simples in vitro.Methods The human ligament cells
文摘This study was carried out to observe the effects of sodium fluoride on acetylcholinesterase (AChE) activities in the cerebral synaptic membranes (SPM) and the peripheral red blood cells (RBC) of rats by in vivo and in vitro experiments. In the in vivo study,pregnant rats ingested ad libitum fluorinated drinking water (5, 15, 50 ppm F ) during their gestation and lactation. It was shown that the AChE activities of the SPM and peripheral RBCs in maternal rats exposed 5 ~ 50 ppm F for 60 days were elevated significantly by 30. 0 ~ 67. 6 % and 12. 5 ~ 31. 9 % in a dose-dependent manner, respectively. The AChE activities of their offspring 80 days after birth were also increaased (8. 7 ~ 28. 7 % for SPM and20. 6 ~ 32. 4 % for RBC). In contrast, the AChE activities of SPM in vitro were inhibited by 5. 0~ 50 .0 mmol F /L treatment in a time-and dose dependent manner. Analaysis with the Hanes plots suggested that the enzymesubstrate kinetics are consistent with a mixed type ofinhibition.
基金The authors wish to express thanks to NationalNatural Science Foundation of China(No.5147416l)Innovation-driven Project of Guangxi Zhuang Autonomous Region(Nos.AA18242003 and AA148242003)。
文摘A new process for manufacturing organically compounded bentonite was devcloped successfully based on the organic intercalation andlayered structure of bentonitc.The main steps in the proposed process included wet sodium activation of bentonite ore,organic com-pounding and high-pressure roll grinding.The optimum procedure is recommended as follows:5 mass%of sodium carbonate powderand 30 wt.%water are added to activate the bentonite ore for 24 h to prepare activated bentonice;0.5 wt.%of organic molecules are adiedinto the activated bentonite for organic compounding for 12 h:then,the high-pressure rollgrinding is followed to treat the organicallycompounded bentonice;:and finally,drying and fine prinding are performed for prenaring the final organically compounded bentoniteprodiuct with 10 wt.%moisture and 98% passing 0.074 mm.The obtained organically compounded bentonite was characterized usingan X-ray diffractometer,a scanning electron microscope and anX-ray photoelectron spectrometer.To confirm the effect of organicallycompounded bentonite on green balls,the pelletizing tests were carried out.The rexsults showed that high-pressure roll grinding can notonly enhance the ability of the crystal layer to hold the combined water.but also strengthen the intercalation compounding of the organicadditive,which is beneficial for the formation of a fiber-interlaced structure of the organically compounded bentonite and improvesthe quality index of the bentonite itself.Also,the organically compounded bentonite is helpiul to improve the indexes of green balls.
基金supported by the National Natural Science Foundation of China(21106054)~~
文摘Cupric oxide （CuO） and copper-cuprous oxide （Cu-Cu2O） nanoparticles were prepared by a simple hydrothermal method for the synthesis of diethyi carbonate （DEC） from ethanol. During these syntheses, varying NaOH and glucose concentrations were applied to explore and pinpoint the active species. It was found that PdCl2/CuO and PdCI2/Cu-Cu2O both catalysts exhibited good thermal stability and morphology. The results of catalytic tests showed that the catalysts prepared with 5 mol/L NaOH show superior catalytic performances because of their lower extent of agglomeration. It is noteworthy that the PdC12/Cu-Cu2O catalysts were the most active, especially the PdCl2/Cu-Cu2O catalyst prepared with 10 mmol glucose and having a higher Cu2O concentration. In Pd（ll）-Cu（II） （PdCl2/CuO） catalysts, there is an induction period, during which Pd（II） is reduced to Pd（0）, that must occur prior to electron transfer between Pd and Cu, and this can slow the catalytic reaction. To further pinpoint the active species, PdCl2/Cu-Cu2O catalysts with different Cu2O contents were prepared by controlling the dosages of glucose. The maximum DEC yield obtained with these catalysts was 151.9 mg.g-1.h-1, corresponding to an ethanol conversion of 7.2% and 97.9% DEC selectivity on an ethanol basis. Therefore, it was concluded that Cu＋ was the active species in this catalytic system, possibly because a higher proportion of Cu＋ reduces the Pd2＋ concentration and limits the CO oxidation side reaction, thus increasing DEC selectivity. In addition, Cu＋ promotes electron transfer between Pd and Cu without an induction period, which could also promote the catalytic activity.
文摘Objective: To explore the therapeutic effect and its mechanism mainly using traditional Chinese medicine (TCM) of Replenishing Qi and Nourishing Yin (RQNY) with a small dosage of Tapazole for treatment of Graves’ disease (GD).Methods: The changes of thyroid function and the activity of sodium pump of human erythrocyte in the patients with Graves’ disease were observed and compared before and after treatment between the treated group (42 cases) by combining treatment mainly using TCM of RQNY and a small amount of Tapazole and a control group (42 cases) by Tapazole alone.Results: After treatment for half a year, one and two years, the serum levels of T3, T4 in above two groups were markedly decreased than those of before treatment, the therapeutic effect of treated group was superior to that of the control group. The activity of sodium pump in human erythrocyte in the GD patients was obviously higher than that of normal group and that of before treatment. After treatment for one and two years mainly by TCM or western medicine, the erythrocyte sodium pump activity was obviously lower than that of normal group and that of before treatment. The decrease of erythrocyte sodium pump activity in the treated group was markedly lower than that in the control group.
