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Oxidation of pyrene using a hemoglobin-catalyzed biocatalytic reaction
금혜인,강구영,정남현 한국응용생명화학회 2017 Applied Biological Chemistry (Appl Biol Chem) Vol.60 No.5
The efficiency to remove polycyclic aromatic hydrocarbons (PAHs) was determined using a hemoglobincatalyzed biocatalytic reaction. The present study employed pyrene as a model of PAHs to study its oxidative removal in the presence of H2O2 and hemoglobin in mass ratio of 3:1. The extent of pyrene removal reached up to 91.1% in the presence of H2O2 and hemoglobin. However, the extent of pyrene removal was 21.3% in the presence of H2O2 only. The results indicate that pyrene removal might be due to pyrene oxidation by the biocatalytic reaction. Overall, this study demonstrated that hemoglobin-catalyzed biocatalytic reactions could remediate pyrene effectively.
Endosinus Bone Gain after Osteotome Sinus Floor Elevation Without Bone Grafting
금혜인,임헌준 대한구강악안면임플란트학회 2024 대한구강악안면임프란트학회지 Vol.28 No.1
Purpose: This retrospective study evaluated the radiographic and clinical outcomes of osteotome sinus floor elevation (OSFE) without bone grafts, and analyzed the factors influencing endosinus bone remodeling. Materials and Methods: Radiographic and clinical data from 44 implants in 36 patients were collected after a follow-up period of 6 months to 6.5 years (mean, 2.04 years). Mean residual bone height (RBH) was 5.0 ± 1.3 mm. The length of the implant protruding into the sinus and endosinus bone gain (ESBG) on radiographs were measured. Results: All the 44 implants survived until the final follow-up period. Groups were divided according to an RBH of 5 mm at the time of implant placement, with 22 implants per group. Mean ESBG was 2.40 ± 1.48 mm in an RBH <5 mm group and 2.01 ± 0.87 mm in an RBH ≥5 mm group. Endosinus bone gain was significantly higher in the RBH <5 mm group for up to one year after the implant placement; however, there was no significant difference between the two groups at the final follow-up period. Conclusion: Osteotome sinus floor elevation without bone grafting is a predictable procedure for achieving endosinus bone remodeling when RBH is <5 mm.