共查询到15条相似文献,搜索用时 71 毫秒
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小球藻光生物反应器脱除空气中二氧化碳的研究 总被引:2,自引:0,他引:2
采用自制的光生物反应器,研究了不同条件对小球藻脱除空气中CO2效果的影响.光生物反应器为圆柱形有机玻璃容器,底面积0.0154m2,高0.2m,容积为3L,反应器内小球藻藻体干重约为7.2g.实验结果表明,用小球藻来固定CO2不仅能脱除通入气体中的CO2,而且可以促进小球藻生长.通入气体的流量和CO2浓度对CO2的脱除率有很大影响.在适宜的实验条件下(通入气体流速为0.6L/min、CO2浓度约1%、温度25~30℃、光强3500lux、pH9.5~8.5),入口气体中CO2约有50%被脱除,该光生物反应器脱除CO2的能力约为0.118g/(L.h).可见利用小球藻光生物反应器固定CO2具有较好的脱除效果,值得进一步研究. 相似文献
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氧化亚铜防污漆表面附着的异养细菌的研究 总被引:4,自引:1,他引:3
研究了浸海氧化亚铜防污漆表面粘膜中异养细菌的组成和数量变动情况。结果表明,粘膜中异养细菌由气单胞菌属、发光杆菌属、假单胞菌属、弧菌属、莫拉氏菌属及产碱菌属等组成,形态特征为具有鞭毛的革兰氏阴性杆菌或球杆菌。浸海初期气单胞菌属为优势类群,但是,随着浸海时间的延长,生物粘膜中优势类群频繁发生演替。粘膜中细菌数量初期增加很快,但当达到一定数量后,就处于一种平衡状态,这表明防污漆表面逐渐形成了成熟的生物粘膜。 相似文献
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几种浸海工程用材料表面生物粘膜中异养细菌的演化 总被引:2,自引:0,他引:2
比较了 4种浸海材料 (氧化亚铜防污漆、防锈漆、钢片和玻片 )表面粘膜中异养细菌的组成和数量。结果表明 ,粘膜中异养细菌主要由气单孢菌属、发光杆菌属、假单孢菌属、弧菌属、色杆菌属、莫拉氏菌属、产碱菌属、噬纤维菌属等组成。浸海初期的优势类群和先锋菌属为气单孢菌属 ,在整个试验过程中优势类群频繁发生演替 ,表面异氧细菌数量变动趋势基本一致。氧化亚铜防污漆和防锈漆表面的异养细菌数量多于钢片和玻片表面的异养细菌数量 ,异养细菌种类则少于钢片、玻片表面的 ,其中以防污漆表面异养细菌的数量为最多 ,达到 1 0 7cfu cm2 。 相似文献
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由于叶绿素a外环境极性的不同,其荧光行为有很大的改变。通过小球藻体内叶绿素荧光光谱特性的研究,发现其体内叶绿素的激发波长有在丙酮溶剂中的相同,均为430 nm,但发射波长为680 nm,红移了13 nm。利用小球藻的叶绿素荧光强度进行水体中叶绿素a的定量检测,在浓度为1~100μg/L的浓度范围内,相对荧光强度与叶绿素浓度有很好的相关性,线性方程为y=0.5338x+1.8515,线性相关系数R2为0.9974。 相似文献
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转基因植物生物反应器的研究进展 总被引:5,自引:0,他引:5
叙述了利用转基因植物作为生物反应器生产重组药物蛋白的研究和商业化现状及其发展趋势,并对其表达和纯化策略以及表达效率的提高作了讨论. 相似文献
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为了探讨颗粒填料在减缓膜污染方面的作用,通过正交实验,研究了颗粒填料复合式膜生物反应器(HMBR)中膜通量、悬浮污泥浓度、颗粒填料体积三个运行参数对膜污染的影响.在实验过程中用平均膜过滤阻力的上升速率(K)来表征膜污染速率.结果表明,膜污染速率与膜通量、悬浮污泥浓度成正比,与填料体积成反比,填料颗粒能够有效地减缓膜污染和提高膜生物反应器的运行稳定性.各运行参数对膜污染速率的影响次序为:膜通量>悬浮污泥浓度>填料体积.在本实验条件下HMBR的最佳操作参数是:X=4g MLSS/L,C=20%,J=4.5L/(m2·h). 相似文献
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The study was designed to evaluate skin permeation enhancement effect of essential oils from Eugenia caryophyllata (clove oil) in rabbits and to compare the in vitro absorption and in vivo permeation using ibuprofen as a model drug. The in vitro results indicated a significant permeation enhancement effect of the clove oil. The group with 1% oil appeared to the flux (239 μg/cm2/hr), and 3% oil was 293 μg/cm2/hr to some extent similar with 2% azone group (327 μg/cm2/hr). The enhancement ratio of clove oil was 7.3. In vivo results also demonstrated that clove oil showed a significant permeation enhancement effect, but the enhancement of clove oil was relatively weak than in vitro. The group with 3% oil exhibited the higher value of area under the curve (AUC) of 80.8 μg/mL·hr, which was 2.4 times the high of control. The AUC value of 3% oil group was similar to that of 2% azone group (89.8 μg/mL·hr). The GC-MS results indicated eugenol and acetyleugenol identified from clove oil might mainly contribute to enhance in vitro and in vivo absorption of ibuprofen because of its large quantities (90.93%). 相似文献
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Svetozar Zhelev Krustev Nikolina Velizarova Rusenova 《Drug development and industrial pharmacy》2014,40(11):1459-1462
The purpose of this study was to analyze ciprofloxacin and lomefloxacin penetration into the anterior eye tissues after topical instillation in healthy rabbits and with experimental Staphylococcus aureus endophthalmitis. Additionally, effect of diclofenac sodium eye drops on the distribution of both fluoroquinolones in the inflamed eye tissues was investigated. An intense protocol with frequent antibiotic administration was chosen. Samples from aqueous humor were obtained 2 and 6?h after the start of the treatment. Samples from cornea and iris were obtained at the end of the experiment, after euthanasia of the animals. Drug concentrations were measured by HPLC method. The median levels of ciprofloxacin and lomefloxacin in aqueous humor of healthy animals, 2 and 6?h after drug administration were 6.39–9.65 and 5.30–6.81?µg/ml, respectively. Ciprofloxacin levels were neither changed from the inflammation nor after instillation of diclofenac. In contrary, lomefloxacin concentrations in aqueous humour of inflamed eye were significantly increased 12.15–15.08?µg/ml, especially after diclofenac administration (17.12–27.76?µg/ml). Levels of both fluoroquinolones in cornea (13.08?µg/g for ciprofloxacin and 12.25?µg/g for lomefloxacin) and in iris (0.84?µg/g for ciprofloxacin and 1.34?µg/g for lomefloxacin) were higher than MIC and MBC values against S. aureus ATCC 25923. Although higher lomefloxacin concentrations were observed in the aqueous humor after instillation of diclofenac, the levels of both fluoroquinolones in iris and in cornea were not significantly changed. Topical administration of lomefloxacin and diclofenac in combination improved penetration of the antibacterial agent in the aqueous humor which can be of clinical importance. 相似文献