The utility of nickel/iron in the remediation of atrazine-contaminated water was investigated. The experimental results showed that nickel/iron had effective catalytic activity in dechlorinating atrazine under acidic ...The utility of nickel/iron in the remediation of atrazine-contaminated water was investigated. The experimental results showed that nickel/iron had effective catalytic activity in dechlorinating atrazine under acidic conditions. The dechlorination reaction approximately followed the first-order kinetics under the experimental conditions(nickel/iron:1.0 g/250 ml;C atrazine=20.0 mg/L), the reaction rate increased with decreasing pH value of the reaction solution and increasing the proportion of Ni:Fe within 2.95%. For condition with 2.95% nickel/iron, the reaction rate constants were 0.07518(R=0.9927), 0.06212(R=0.9846) and 0.00131 min -1(R=0.9565) at pH=2.0, 3.0 and 4.0, respectively. HPLC analysis was used to monitor the decline of atrazine concentration.展开更多
This paper briefly describes the research and practical application of the automatic sump cleaning and dredging machine and the sump cleaning system in Jiulong Mine, and emphatically discusses the application of the s...This paper briefly describes the research and practical application of the automatic sump cleaning and dredging machine and the sump cleaning system in Jiulong Mine, and emphatically discusses the application of the sump cleaning and dredging machine and the automatic sump cleaning and dredging machine from the aspects of the application background of the sump cleaning system, the main performance of the sump cleaning and dredging equipment, the main characteristics of the equipment, the field application effect, economic and social benefits, and the popularization and application prospect. In particular, the innovations in the ideas of water bin clarification, coal slurry stirring, pumping, dewatering, loading automation and mechanized flow-line operation of the water bin dredging machine have not only effectively improved the working efficiency of the coal mine water bin automatic dredging system and reduced the frequency of water bin dredging, but also have broad promotion and application prospects.展开更多
In 1990, nanobacterium was found and named by Kajander.~1 With distinct mineralizing ability, nanobacteria are thought to play a role in extraskeletal calcifying diseases. It have been found in many human tissues, but...In 1990, nanobacterium was found and named by Kajander.~1 With distinct mineralizing ability, nanobacteria are thought to play a role in extraskeletal calcifying diseases. It have been found in many human tissues, but whether they exist in the bile or gallbladder mucosa remains unclear. The present study was undertaken to investigate by ELISA, bacterial culturing, immunohistochemical staining and transmission electron microscopy (TEM), whether nanobacteria exist in serum, bile or gallbladder mucosa of healthy people and patients with cholecystolithiasis.展开更多
文摘The utility of nickel/iron in the remediation of atrazine-contaminated water was investigated. The experimental results showed that nickel/iron had effective catalytic activity in dechlorinating atrazine under acidic conditions. The dechlorination reaction approximately followed the first-order kinetics under the experimental conditions(nickel/iron:1.0 g/250 ml;C atrazine=20.0 mg/L), the reaction rate increased with decreasing pH value of the reaction solution and increasing the proportion of Ni:Fe within 2.95%. For condition with 2.95% nickel/iron, the reaction rate constants were 0.07518(R=0.9927), 0.06212(R=0.9846) and 0.00131 min -1(R=0.9565) at pH=2.0, 3.0 and 4.0, respectively. HPLC analysis was used to monitor the decline of atrazine concentration.
文摘This paper briefly describes the research and practical application of the automatic sump cleaning and dredging machine and the sump cleaning system in Jiulong Mine, and emphatically discusses the application of the sump cleaning and dredging machine and the automatic sump cleaning and dredging machine from the aspects of the application background of the sump cleaning system, the main performance of the sump cleaning and dredging equipment, the main characteristics of the equipment, the field application effect, economic and social benefits, and the popularization and application prospect. In particular, the innovations in the ideas of water bin clarification, coal slurry stirring, pumping, dewatering, loading automation and mechanized flow-line operation of the water bin dredging machine have not only effectively improved the working efficiency of the coal mine water bin automatic dredging system and reduced the frequency of water bin dredging, but also have broad promotion and application prospects.
文摘In 1990, nanobacterium was found and named by Kajander.~1 With distinct mineralizing ability, nanobacteria are thought to play a role in extraskeletal calcifying diseases. It have been found in many human tissues, but whether they exist in the bile or gallbladder mucosa remains unclear. The present study was undertaken to investigate by ELISA, bacterial culturing, immunohistochemical staining and transmission electron microscopy (TEM), whether nanobacteria exist in serum, bile or gallbladder mucosa of healthy people and patients with cholecystolithiasis.
