Magnetic measurements and heavy metal analyses were performed on street dusts from the main urban area of Chibi（赤壁） City,Hubei（湖北） Province,China.Results revealed that a PSD/MD（pseudo-single-domain/multi-dom...Magnetic measurements and heavy metal analyses were performed on street dusts from the main urban area of Chibi（赤壁） City,Hubei（湖北） Province,China.Results revealed that a PSD/MD（pseudo-single-domain/multi-domain） magnetite-like phase dominates the magnetic phases of the street dust.Concentration-related magnetic parameters,such as magnetic susceptibility（χ）,anhysteretic remanent magnetization（ARM）,and saturation isothermal remanent magnetization（SIRM） of samples increased in the main roads but appeared lower in the landscape area of the Lushui（陆水） Lake and closely correlated with the concentration of heavy metal Fe,Cu,and Co,and the correlation coefficients are 0.786 for Fe-χ,0.548 for Cu-χ,and 0.580 for Co-χ,respectively.However,much strong correlations between SIRM and the concentrations of heavy metal suggest that SIRM is a better indicator for heavy metal pollution in the street dust in the study area.The magnetic particles in the street dust are mainly derived from anthropogenic activities,such as vehicle emissions,abrasion of tires,coal combustion,cement works,and building materials.These results make it possible to use magnetic techniques as simple,rapid,and nondestructive tools for assessing the heavy metal pollutions in urbanization process.展开更多
Purpose: To compare the surgical indicators, perioperative complications and postoperative psychological status of patients with coronary interventional therapy (CIT) by radical artery and femoral artery puncture appr...Purpose: To compare the surgical indicators, perioperative complications and postoperative psychological status of patients with coronary interventional therapy (CIT) by radical artery and femoral artery puncture approaches. Methods: 120 patients with CIT were divided into femoral artery group (FAG) and radial artery group (RAG) according to the operation ways. The interventional operation was performed by the same surgeon team and methods. Data of surgical indicators and perioperative complications were recorded and collected. The psychological questionare survey was made within 48 hours the after surgery by the hospital anxiety and depression scale (HAD), and the results were scored by the psychiatrist. Results: The age, sex, ethnicity, education level, disease type, and combined diseases of the two groups had homogeneity without statistical difference. There was no obvious difference in X-ray exposure time, contrast agent usage and operation time in two ways (P > 0.05). The success rate of one-time catheterization was higher in FAG than in RAG (P Conclusion: CIT via radial artery can reduce the incidence of postoperative complications, postoperative physical discomfort and psychological problems such as anxiety and depression of patients.展开更多
基金supported by the National Natural Science Foundation of China (No. 40474025)
文摘Magnetic measurements and heavy metal analyses were performed on street dusts from the main urban area of Chibi（赤壁） City,Hubei（湖北） Province,China.Results revealed that a PSD/MD（pseudo-single-domain/multi-domain） magnetite-like phase dominates the magnetic phases of the street dust.Concentration-related magnetic parameters,such as magnetic susceptibility（χ）,anhysteretic remanent magnetization（ARM）,and saturation isothermal remanent magnetization（SIRM） of samples increased in the main roads but appeared lower in the landscape area of the Lushui（陆水） Lake and closely correlated with the concentration of heavy metal Fe,Cu,and Co,and the correlation coefficients are 0.786 for Fe-χ,0.548 for Cu-χ,and 0.580 for Co-χ,respectively.However,much strong correlations between SIRM and the concentrations of heavy metal suggest that SIRM is a better indicator for heavy metal pollution in the street dust in the study area.The magnetic particles in the street dust are mainly derived from anthropogenic activities,such as vehicle emissions,abrasion of tires,coal combustion,cement works,and building materials.These results make it possible to use magnetic techniques as simple,rapid,and nondestructive tools for assessing the heavy metal pollutions in urbanization process.
文摘Purpose: To compare the surgical indicators, perioperative complications and postoperative psychological status of patients with coronary interventional therapy (CIT) by radical artery and femoral artery puncture approaches. Methods: 120 patients with CIT were divided into femoral artery group (FAG) and radial artery group (RAG) according to the operation ways. The interventional operation was performed by the same surgeon team and methods. Data of surgical indicators and perioperative complications were recorded and collected. The psychological questionare survey was made within 48 hours the after surgery by the hospital anxiety and depression scale (HAD), and the results were scored by the psychiatrist. Results: The age, sex, ethnicity, education level, disease type, and combined diseases of the two groups had homogeneity without statistical difference. There was no obvious difference in X-ray exposure time, contrast agent usage and operation time in two ways (P > 0.05). The success rate of one-time catheterization was higher in FAG than in RAG (P Conclusion: CIT via radial artery can reduce the incidence of postoperative complications, postoperative physical discomfort and psychological problems such as anxiety and depression of patients.
