Objective To investigate the clinical curative effect of absorbable screw in the treatment of Limbs joint fracture. Methods From May 2009 to May 2011, 86 patients of Limbs joint fracture in our hospital were randomly divided into the observation group and the control group. The observation group were treated with absorbable screw while the control group were given conventional treatment methods of fracture treatment, and the clinical effect of the two groups were observed after treatment. Results The excellent rate was 56. 3% in control group and 96. 3% in observation group. The excellent rate of the clinical treatment in the observation group was significantly better than the control group with a statistically significant difference (P<0. 05). Conclusion The clinical efficacy of absorbable screw for limbs joint frac-ture is significant, and its operation safety is higher. It improves the life quality of patients and it is worth of clinical promotion.

The emission of hydrogen sulfide in the waste gas from slaughter plant, fishmeal feed processing and some other food industrial processing could cause serious air pollution to the surrounding environment. The purpose of this study was to screen heterotrophic bacterium strains for the removal of hydrogen sulfide odor. One heterotrophic bacterial mutant ZJNB-B3 was derived from the sulfide degrader Bacillus cereus XJ-2 and its sulfide removal efficiency was 97%. Based on the morphology studies, biochemical tests and 16S rRNA gene analysis, the strain was identified as Bacillus cereus ZJNB-B3. The NCBI GenBank accession number is MF679650. Batch tests showed that the strain tolerated up to 300 mg/L of toxic S²⁻ concentration. Response surface methodology was applied to optimize the conditions of degradation of sulfide. The optimal parameters were as follows: initial sulfide concentration 211.8 mg/L, initial pH 6.72, inoculum volume 5.04%, and incubation temperature 30 ℃. The accumulated sulfate concentration was 63.8 mg/L and the sulfide removal efficiency was 97.3% after 48 h incubation. No sulfuric acid was generated during sulfide oxidation by the strain. Sulfide could be removed effectively by this strain under mild pH conditions. The results suggested that the strain may have great industrial application potential. This study provides the fundamentals for the removal of hydrogen sulfide gas.