点阵激光用于痤疮患者的临床治疗对疗效、皮损改善、经表皮失水量、皮肤表面pH值、血红素含量的影响观察

目的探讨点阵激光用于痤疮患者的临床治疗对疗效、皮损改善、经表皮失水量、皮肤表面pH值、血红素含量的影响。方法选取2017年2月—2019年2月本院收治的86例面部痤疮患者,随机分为观察组与对照组,各43例。对照组患者口服异维A酸软胶囊,外用阿达帕林凝胶进行治疗。观察组患者采用点阵激光联合药物进行治疗,使用药物同对照组。比较2组治疗前后临床疗效、皮损改善、经表皮失水量、皮肤表面pH值、血红素含量的变化。结果治疗后观察组和对照组的总有效率分别为95.35%和79.07%,观察组显著高于对照组(P<0.05)。治疗后2组患者各部位经表皮失水量、皮肤表面pH值、血红素含量较治疗前显著降低,且观察组各项皮肤生理指标均低于对照组(P<0.05)。治疗后2组患者均出现不同程度面部脱屑、干燥、潮红等不良反应,观察组不良反应总发生率为20.93%,对照组不良反应总发生率为16.28%,2组不良反应总发生率相当(P>0.05)。结论点阵激光用于痤疮患者临床治疗,可有效改善患者皮损情况,降低经表皮失水量、皮肤表面pH值、血红素含量等各项皮肤生理指标水平,有助于患者面部痤疮的恢复,还可有效降低治疗后患者疼痛感和红斑水肿等不良反应的发生,治疗有一定安全性。

亚铁离子对厌氧氨氧化反应器脱氮性能的影响

研究通过投加厌氧氨氧化污泥,待反应器稳定运行后考察不同浓度Fe2+对厌氧氨氧化污泥活性的影响.实验结果表明:经过210 d的连续培养,发现Fe2+可以促进厌氧氨氧化菌的细胞合成并且增加其基质代谢,当溶液中Fe2+浓度为0.085 mmol/L(4.76 mg/L)时,氨氮转化率维持在90%以上;添加Fe2+可以增加厌氧氨氧化菌亚铁血红素含量.此时样品中亚铁血红素C含量达到0.143μmol/mg,是同期对照反应器的2.04倍.通过SEM电镜发现当Fe2+浓度为0.085 mmol/L时,厌氧氨氧化菌群结构与形态趋于稳定.

Vitreoscilla hemoglobin gene(vgb)improves lutein production in Chlorella vulgaris

Vitreoscilla hemoglobin is an oxygen-binding protein that promotes oxygen delivery and reduces oxygen consumption under low oxygen conditions to increase the effi ciency of cell respiration and metabolism.In this study,we introduced a Vitreoscilla hemoglobin gene(vgb)into Chlorella vulgaris by Agrobacterium tumefaciens-mediated transformation(ATMT).PCR analysis confi rmed that the vgb gene was successfully integrated into the Chlorella vulgaris genome.Analysis of biomass obtained in shake fl asks revealed transformant biomass concentrations as high as 3.28 g/L,which was 38.81% higher than that of the wild-type strain.Lutein content of transformants also increased slightly.Further experiments recovered a maximum lutein yield of 2.91 mg/L from the transformants,which was 36.77% higher than that of the wild-type strain.The above results suggest that integrated expression of the vgb gene may improve cell growth and lutein yield in Chlorella vulgaris,with applications to lutein production from Chlorella during fermentation.