In this paper, glasshouse experiments were conducted to determine the accumulation, distribution and transformation of DDTs and HCHs by maize under pot culture conditions. The culture soil was spiked with the organic ...In this paper, glasshouse experiments were conducted to determine the accumulation, distribution and transformation of DDTs and HCHs by maize under pot culture conditions. The culture soil was spiked with the organic pollutants and samples were collected in different durations. Analysis of the plants at harvest showed that the selected plant varied widely in their ability to remove and translo- cate DDTs and HCHs from the soil, the bioconcentration factor ranged from 0.004 to 0.027 for the shoot and from 0.036 to 0.097 for the roots, and the translocation factors were lower than 0.1 with variation between DDTs and HCHs, but no signifi- cant differences were observed. DDTs appeared to have accumulated by both pas- sive adsorption and active absorption, p,p＇-DDT and p,p＇-DDE were the major metabolite and the transformation was mediated by reductive dehalogenation, the affinity of the OCPs for lipids is one of the major factors affecting their uptake and translocation within the plants.展开更多
Patients with osteomyelitis require lengthy antibiotic treatment, often only to see the inflammation flare up once antibiotics are suspended. Unfortunately, patients often discontinue the antibiotic treatment due to c...Patients with osteomyelitis require lengthy antibiotic treatment, often only to see the inflammation flare up once antibiotics are suspended. Unfortunately, patients often discontinue the antibiotic treatment due to collateral effects. Patients with osteitis are often polymorbid patients with other severe diseases such as diabetes mellitus and polyneuropathy, arteriopathy or polyarthfitis with immunosuppression. The eight patients included in the study presented nine bones with osteomyelitis （macroscopically, bacteriologically, histologically or radiologically）. The diseased part of the bone was resected, a locally radical debridement was done and a biopsy for bacteriology and histology were taken. The residual bone was then drilled out and filled with antibiotic-loaded （gentamicin） resorbable bone-graft substitute under radiologic imaging control. In total, seven patients are currently without recurrent osteomyelitis with a mean follow-up of 5.77 months （2-11 months）. The Kaplan Meier curve shows 80% survival rate without recurrent osteomyelitis at 11 months. Only one patient suffering from Morbus Buerger had a relapse osteomyelitis after cutting off severing his foot while swimming in the sea. Antibiotic-loaded resorbable bone-graft substitute is easy to use, has in our hands few complications and low recurrence rate.展开更多
基金Supported by the Youth Innovation Fund of Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences(2009QNJJN01)the Science and Technology Innovation Fund of Inner Mongolia(2011CXJJN01)the Application Technology Research and Development Program from Department of Science and Technology of Inner Mongolia(20110516)~~
文摘In this paper, glasshouse experiments were conducted to determine the accumulation, distribution and transformation of DDTs and HCHs by maize under pot culture conditions. The culture soil was spiked with the organic pollutants and samples were collected in different durations. Analysis of the plants at harvest showed that the selected plant varied widely in their ability to remove and translo- cate DDTs and HCHs from the soil, the bioconcentration factor ranged from 0.004 to 0.027 for the shoot and from 0.036 to 0.097 for the roots, and the translocation factors were lower than 0.1 with variation between DDTs and HCHs, but no signifi- cant differences were observed. DDTs appeared to have accumulated by both pas- sive adsorption and active absorption, p,p＇-DDT and p,p＇-DDE were the major metabolite and the transformation was mediated by reductive dehalogenation, the affinity of the OCPs for lipids is one of the major factors affecting their uptake and translocation within the plants.
文摘Patients with osteomyelitis require lengthy antibiotic treatment, often only to see the inflammation flare up once antibiotics are suspended. Unfortunately, patients often discontinue the antibiotic treatment due to collateral effects. Patients with osteitis are often polymorbid patients with other severe diseases such as diabetes mellitus and polyneuropathy, arteriopathy or polyarthfitis with immunosuppression. The eight patients included in the study presented nine bones with osteomyelitis （macroscopically, bacteriologically, histologically or radiologically）. The diseased part of the bone was resected, a locally radical debridement was done and a biopsy for bacteriology and histology were taken. The residual bone was then drilled out and filled with antibiotic-loaded （gentamicin） resorbable bone-graft substitute under radiologic imaging control. In total, seven patients are currently without recurrent osteomyelitis with a mean follow-up of 5.77 months （2-11 months）. The Kaplan Meier curve shows 80% survival rate without recurrent osteomyelitis at 11 months. Only one patient suffering from Morbus Buerger had a relapse osteomyelitis after cutting off severing his foot while swimming in the sea. Antibiotic-loaded resorbable bone-graft substitute is easy to use, has in our hands few complications and low recurrence rate.
