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Corning® 500mL Bottle Top Vacuum Filter, 0.45µm Pore 33.2cm2 CA Membrane, Fits 45mm Diameter Necks, Sterile

Corning ® 500mL瓶顶真空过滤器,0.45μm孔33.2cm²CA膜,适合45mm直径脖子,无菌

Company: Corning
Catalog#: 430514
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Enriching Acidophilic Fe(II)-oxidizing Bacteria in No-flow, Fed-batch Systems
Author:
Date:
2017-02-05
[Abstract]  Low-pH microbial Fe(II) oxidation occurs naturally in some Fe(II)-rich acid mine drainage (AMD) ecosystems across so-called terraced iron formations. Indigenous acidophilic Fe(II)-oxidizing bacterial communities can be incorporated into both passive and active treatments to remove Fe from the AMD solution. Here, we present a protocol of enriching acidophilic Fe(II)-oxidizing bacteria in no-flow, fed-batch systems. Mixed cultures of naturally occurring microbes are enriched from the fresh surface sediments at AMD sites using a chemo-static bioreactor (Eppendorf BioFlo®/Celligen® 115 Fermentor) with respect to constant stirring speed, temperature, pH and unlimited dissolved oxygen. Ferrous sulfate is discontinuously added to the reactor as the primary substrate to ... [摘要]  低pH微生物Fe(II)氧化在一些富含Fe(II)的酸性矿井排水(AMD)生态系统中自然发生在所谓的梯田铁层上。土着嗜酸性Fe(II) - 氧化细菌群落可纳入被动和主动处理以从AMD溶液中除去Fe。在这里,我们提出了在无流量,补料分批系统中富含嗜酸性Fe(II) - 氧化细菌的方案。天然存在的微生物的混合培养物使用化学静态生物反应器(Eppendorf BioFlo / Celligen 115发酵罐)从AMD位点的新鲜表面沉积物富集,相对于常数搅拌速度,温度,pH和无限溶解氧。将硫酸亚铁不连续地加入到反应器中作为主要底物,以富集嗜酸性Fe(II) - 氧化细菌。成功和有效地富集嗜酸性Fe(II) - 氧化细菌有助于将这种生物地球化学过程用于AMD治疗系统。

背景 低pH微生物Fe(II)氧化可以通过增强梯田铁地层的发展而被纳入到AMD被动处理系统中(DeSa等人,2010; Brown等人 ,2011; Larson等人,2014a和2014b)。对于非常难治疗的AMD(非常低的pH,非常高浓度的Fe(II)和相关金属),通过富含嗜酸性Fe(II)氧化细菌群落需要主动治疗生物反应器。这个过程可以有效地改变高酸度,高金属排放到中等酸度(仍然很低的pH),低金属排放(Sheng等人,2016)。
 嗜酸性好氧Fe(II)氧化剂酸性硫杆菌属,钩端螺旋体属和黑曲霉属Ferrovum ...

Preparation of Outer Membrane Vesicle from Escherichia coli
Author:
Date:
2013-12-05
[Abstract]  Outer membrane vesicles (OMVs) are spherical bilayered phospholipids of 20-200 nm in size produced from all Gram-negative bacteria and Gram-positive bacteria investigated to date. Previous biochemical and proteomic studies have revealed that the Gram-negative bacteria-derived OMVs are composed of various components like outer membrane proteins, lipopolysaccharides, outer membrane lipids, periplasmic proteins, DNA, and RNA. Here, in this protocol, we describe the method to isolate the OMVs from the culture supernatant of Escherichia coli (E. coli). [摘要]  外膜囊泡(OMV)是从所有革兰氏阴性细菌和革兰氏阳性细菌产生的20-200nm的球形双层磷脂,迄今为止研究。 以前的生物化学和蛋白质组学研究已经显示,革兰氏阴性细菌衍生的OMV由各种组分组成,如外膜蛋白,脂多糖,外膜脂质,周质蛋白,DNA和RNA。 在这里,在该方案中,我们描述了从大肠杆菌的培养物上清液中分离OMV的方法(大肠杆菌)。

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