目的观察755nm皮秒激光联合纳晶微针导入氨甲环酸治疗黄褐斑的疗效临床疗效。方法将40例黄褐斑患者随机分为两组,试验组采用755nm皮秒激光联合纳晶微针导入氨甲环酸治疗,对照组采用单纯皮秒激光治疗,两组患者治疗前、治疗第2个月、第4...目的观察755nm皮秒激光联合纳晶微针导入氨甲环酸治疗黄褐斑的疗效临床疗效。方法将40例黄褐斑患者随机分为两组,试验组采用755nm皮秒激光联合纳晶微针导入氨甲环酸治疗,对照组采用单纯皮秒激光治疗,两组患者治疗前、治疗第2个月、第4个月、第7个月拍照存档,按照黄褐斑皮损面积和严重度指数(melasma area and severity index,MASI)进行评分。结果试验组和对照组从开始治疗的第二个月MASI值就开始出现下降,试验组治疗后第七个月MSAI分值最低,从治疗前(14.86±3.33)下降至(8.33±2.39),对照组的MASI分值下降至(10.23±2.84).试验组分值明显低于对照组(P<0.05)。试验组治疗后MASI下降率为(44.82±5.73)%,明显高于对照组,差异具有统计学意义。结论755nm皮秒激光联合纳晶微针导入氨甲环酸能有效治疗黄褐斑,安全性好,不良反应少。展开更多
A bench-scale experiment for control of hydrogen sulfide （H2S） emissions was carried out continuously for nearly four months by using bio-trickling filter packed with ZX01 stuffing. The results suggested that the bi...A bench-scale experiment for control of hydrogen sulfide （H2S） emissions was carried out continuously for nearly four months by using bio-trickling filter packed with ZX01 stuffing. The results suggested that the bio-trickling filter had proven excellent performance over substantial operational periods. Removal efficiency of H2S was nearly 100% when volumetric loading of the bio-trickling filter varied from 0.64 g/（m^3·h） to 38.20 g/（m^3·h） and metabolism products of H2S were mainly composed of SO4^2-. When inlet concentration of H2S was 250 mg/m^3, the optimum gas retention time was 30 s and the optimum spray water flow rate was 0.005 9-0.012 L/（cm^2·h）. The bio-trickling filter had good ability to resist shock of high volumetric loading, and was not blocked during experiments for nearly four months during which resistance was maintained at relatively lower value, so that the bio-trickling filter need not carry out back washing frequently and can be operated steadily for long-term.展开更多
文摘目的观察755nm皮秒激光联合纳晶微针导入氨甲环酸治疗黄褐斑的疗效临床疗效。方法将40例黄褐斑患者随机分为两组,试验组采用755nm皮秒激光联合纳晶微针导入氨甲环酸治疗,对照组采用单纯皮秒激光治疗,两组患者治疗前、治疗第2个月、第4个月、第7个月拍照存档,按照黄褐斑皮损面积和严重度指数(melasma area and severity index,MASI)进行评分。结果试验组和对照组从开始治疗的第二个月MASI值就开始出现下降,试验组治疗后第七个月MSAI分值最低,从治疗前(14.86±3.33)下降至(8.33±2.39),对照组的MASI分值下降至(10.23±2.84).试验组分值明显低于对照组(P<0.05)。试验组治疗后MASI下降率为(44.82±5.73)%,明显高于对照组,差异具有统计学意义。结论755nm皮秒激光联合纳晶微针导入氨甲环酸能有效治疗黄褐斑,安全性好,不良反应少。
基金Project supported by the Foundation for Scientific Research Col-laborating with Overseas Scholar of Heilongjiang Province, China (No. WC03305)the Foundation for Science and Technology of Harbin City, China (No. 2002AA4CS087)
文摘A bench-scale experiment for control of hydrogen sulfide （H2S） emissions was carried out continuously for nearly four months by using bio-trickling filter packed with ZX01 stuffing. The results suggested that the bio-trickling filter had proven excellent performance over substantial operational periods. Removal efficiency of H2S was nearly 100% when volumetric loading of the bio-trickling filter varied from 0.64 g/（m^3·h） to 38.20 g/（m^3·h） and metabolism products of H2S were mainly composed of SO4^2-. When inlet concentration of H2S was 250 mg/m^3, the optimum gas retention time was 30 s and the optimum spray water flow rate was 0.005 9-0.012 L/（cm^2·h）. The bio-trickling filter had good ability to resist shock of high volumetric loading, and was not blocked during experiments for nearly four months during which resistance was maintained at relatively lower value, so that the bio-trickling filter need not carry out back washing frequently and can be operated steadily for long-term.
