The effects of different Zn contents in Al-Mg alloy on the microstructure characterizations were observed by advanced electron microscopy and the corrosion properties were investigated by the inter-granular corrosion ...The effects of different Zn contents in Al-Mg alloy on the microstructure characterizations were observed by advanced electron microscopy and the corrosion properties were investigated by the inter-granular corrosion tests,the exfoliation corrosion tests,and the Potentiodynamic polarizaion tests.The τ phase(Mg_(32)(Al,Zn)_(49)) forms on the pre-existing Mn-rich particles and at the grain boundaries.According to the theory of binding energy,the formation of τ phase is much easier than that of β phase(Al_3Mg_2),somehow replacing β phase and reducing the possibility of β phase precipitation.This change dramatically decreases the susceptibility of corrosion.The Zn addition increases the corrosion resistance of Al-Mg alloy with an optimal value of 0.31%.When the Zn addition is increased to 0.78%,however,the corrosion resistance of alloy decreases once again but it is still better than that of the alloy without Zn addition.展开更多
Objective: To investigate effect of electroacupuncture (EA) on serum copper, zinc, calcium and magnesium levels in the rat models of depression. Methods: Forty healthy SD male rats were divided into a normal group, a ...Objective: To investigate effect of electroacupuncture (EA) on serum copper, zinc, calcium and magnesium levels in the rat models of depression. Methods: Forty healthy SD male rats were divided into a normal group, a model group, an EA group, and a maprotiline group, 10 in each with completely random. The depression models were prepared with isolated chronic unpredictable stress method in the latter three groups. EA was given at Baihui (GV 20), Yintang (EX-HN3), Fenglong (ST 40), and Taichong (LR 3) in the EA group from the second day of modeling, once every other day, 15 min each time. The maprotiline group was administered intragastrically suspension of maprotiline (10 mg/kg), once each day. After treatment for 3 weeks, serum copper and zinc levels were detected with atomic absorption method, and the serum calcium with Arsenazo Ⅲ method and magnesium with MTB method. Results: Compared with the normal group, the serum copper level (3.90±1.20mmol/L) significantly increased and the serum zinc level (2.08±0.44mmol/L) significantly decreased in the model group (P<0.05). Compared with the model group, the serum copper level (2.62±1.03mmol/L) significantly decreased, the serum zinc level (2.55±0.38mmol/L) significantly increased (P<0.05), but the serum calcium and magnesium levels did not significantly change in the EA group and the maprotiline group. Conclusion: EA can regulate the change of copper and zinc levels in the body induced by depression, which is possibly one of mechanisms of effectively improving depression symptoms.展开更多
OBJECTIVE:To investigate the correlation between the patterns of Traditional Chinese Medicine(TCM)syndromes and the serum concentration of zinc,iron,copper and magnesium of patients with chronic hepatitis B(CHB) and h...OBJECTIVE:To investigate the correlation between the patterns of Traditional Chinese Medicine(TCM)syndromes and the serum concentration of zinc,iron,copper and magnesium of patients with chronic hepatitis B(CHB) and hepatitis B virus(HBV)-induced liver cirrhosis.METHODS:A total of 86 patients were included in the study between March 1,2009 and January 1,2010.All were diagnosed with CHB or HBV-induced liver cirrhosis according to the diagnosis standard of the Chinese Medical Association.Fasting serum concentrations of zinc,iron,copper and magnesium were measured.Patients were classified into different patterns of TCM symptoms according to TCM theory and clinical experience.RESULTS:In the HBV-induced liver cirrhosis group,the mean zinc concentration in patients with the TCM pattern of stagnation of fluid-Dampness was lower than that in patients with obstruction of collaterals by Blood stasis(P < 0.034).In the CHB group,the mean magnesium concentration in patients with toxic Heat flourishing was significantly lower than that in those with Damp-Heat in the Liver and Gallbladder,and those with Liver depression and Spleen deficiency(P < 0.021).The concentrations of iron and copper showed little difference among the different TCM symptom patterns.CONCLUSION:The serum zinc and magnesium concentrations correlated with certain TCM patterns of symptoms in patients with HBV-induced liver cirrhosis and CHB.It may be helpful to interpret the pathogenic change in the TCM symptom patterns in liver cirrhosis and CHB,and also to conduct clinical treatment of the diseases based on identified TCM patterns.展开更多
基金Project(2011-006)supported by the State Administration of Science,Technology and Industry for National Defence,China
文摘The effects of different Zn contents in Al-Mg alloy on the microstructure characterizations were observed by advanced electron microscopy and the corrosion properties were investigated by the inter-granular corrosion tests,the exfoliation corrosion tests,and the Potentiodynamic polarizaion tests.The τ phase(Mg_(32)(Al,Zn)_(49)) forms on the pre-existing Mn-rich particles and at the grain boundaries.According to the theory of binding energy,the formation of τ phase is much easier than that of β phase(Al_3Mg_2),somehow replacing β phase and reducing the possibility of β phase precipitation.This change dramatically decreases the susceptibility of corrosion.The Zn addition increases the corrosion resistance of Al-Mg alloy with an optimal value of 0.31%.When the Zn addition is increased to 0.78%,however,the corrosion resistance of alloy decreases once again but it is still better than that of the alloy without Zn addition.
基金supported by the International Classical CulturalAssociation (No. XDHT2009023A)
文摘Objective: To investigate effect of electroacupuncture (EA) on serum copper, zinc, calcium and magnesium levels in the rat models of depression. Methods: Forty healthy SD male rats were divided into a normal group, a model group, an EA group, and a maprotiline group, 10 in each with completely random. The depression models were prepared with isolated chronic unpredictable stress method in the latter three groups. EA was given at Baihui (GV 20), Yintang (EX-HN3), Fenglong (ST 40), and Taichong (LR 3) in the EA group from the second day of modeling, once every other day, 15 min each time. The maprotiline group was administered intragastrically suspension of maprotiline (10 mg/kg), once each day. After treatment for 3 weeks, serum copper and zinc levels were detected with atomic absorption method, and the serum calcium with Arsenazo Ⅲ method and magnesium with MTB method. Results: Compared with the normal group, the serum copper level (3.90±1.20mmol/L) significantly increased and the serum zinc level (2.08±0.44mmol/L) significantly decreased in the model group (P<0.05). Compared with the model group, the serum copper level (2.62±1.03mmol/L) significantly decreased, the serum zinc level (2.55±0.38mmol/L) significantly increased (P<0.05), but the serum calcium and magnesium levels did not significantly change in the EA group and the maprotiline group. Conclusion: EA can regulate the change of copper and zinc levels in the body induced by depression, which is possibly one of mechanisms of effectively improving depression symptoms.
文摘OBJECTIVE:To investigate the correlation between the patterns of Traditional Chinese Medicine(TCM)syndromes and the serum concentration of zinc,iron,copper and magnesium of patients with chronic hepatitis B(CHB) and hepatitis B virus(HBV)-induced liver cirrhosis.METHODS:A total of 86 patients were included in the study between March 1,2009 and January 1,2010.All were diagnosed with CHB or HBV-induced liver cirrhosis according to the diagnosis standard of the Chinese Medical Association.Fasting serum concentrations of zinc,iron,copper and magnesium were measured.Patients were classified into different patterns of TCM symptoms according to TCM theory and clinical experience.RESULTS:In the HBV-induced liver cirrhosis group,the mean zinc concentration in patients with the TCM pattern of stagnation of fluid-Dampness was lower than that in patients with obstruction of collaterals by Blood stasis(P < 0.034).In the CHB group,the mean magnesium concentration in patients with toxic Heat flourishing was significantly lower than that in those with Damp-Heat in the Liver and Gallbladder,and those with Liver depression and Spleen deficiency(P < 0.021).The concentrations of iron and copper showed little difference among the different TCM symptom patterns.CONCLUSION:The serum zinc and magnesium concentrations correlated with certain TCM patterns of symptoms in patients with HBV-induced liver cirrhosis and CHB.It may be helpful to interpret the pathogenic change in the TCM symptom patterns in liver cirrhosis and CHB,and also to conduct clinical treatment of the diseases based on identified TCM patterns.
