新浪登录
腾讯登录Envir Sci & Tech：揭示有效杀灭致病菌的新型过滤除菌法
| 导读 | <p align="center"><em><img src="http://www.bioon.com/biology/UploadFiles/201208/2012080922254059.jpg" alt="" width="531" height="251" b... |
<p align="center"><em><img src="http://www.bioon.com/biology/UploadFiles/201208/2012080922254059.jpg" alt="" width="531" height="251" border="0" /></em></p>
和一般大众的想法相反，来自家庭水龙头的可饮用纯净水包含了数以百万计的不同细菌（每加仑），然而科学家近日开发了一种新的方法来“操纵”水中的有益细菌，使其给饮水者带来健康效应，避免其感染。这项研究刊登在了ACS旗下的杂志<em>Environment Science & Technology</em>上。
研究者Lutgarde解释道，市政污水处理厂尽力去减少过滤器中细菌的生存的同时，其也会去除一些颗粒和物质，这些东西恰恰是细菌的营养供给，使得细菌可以生长。相应的措施会增加水中的氯或者消毒剂来杀灭细菌以阻止其在水管中生长。尽管如此，当前的技术并不可能完全小鼠饮用水中的细菌，因此研究过滤器和其它的水处理设施如何影响细菌的类型显得尤为重要，这也就是研究者开展此项研究的初衷。
<!--more-->
研究者的研究提供了一些建议，关于如何终结饮用水中的细菌的一些策略。科学家们发现特定类型的细菌吸附于过滤器中，在过滤器中细菌可以产生生物被膜，从而使其进入饮用水中，引发人类的感染。水体的PH值就是指示细菌进入饮用水的一个典型的指标，改变水体PH值或者清理过滤器可以有效改变有益和有害细菌的比率，从而降低有害细菌感染人类。
编译自：<a title="" href="http://www.sciencedaily.com/releases/2012/08/120808121820.htm" target="_blank">Leveraging Bacteria in Drinking Water to Benefit Consumers</a>
<div id="ztload">
<div> </div>
<div>
<div>
<img src="http://www.bioon.com/biology/UploadFiles/201208/2012080922250947.jpg" alt="" width="113" height="149" border="0" />
<a title="" href="http://dx.doi.org/doi:10.1021/es302042t" target="_blank">doi:10.1021/es302042t</a>
PMC:
PMID:
</div>
<div>
<br/><strong>Bacterial Community Structure in the Drinking Water Microbiome Is Governed by Filtration Processes</strong><br/>
Ameet J. Pinto†, Chuanwu Xi‡, and Lutgarde Raskin†*
The bacterial community structure of a drinking water microbiome was characterized over three seasons using 16S rRNA gene based pyrosequencing of samples obtained from source water (a mix of a groundwater and a surface water), different points in a drinking water plant operated to treat this source water, and in the associated drinking water distribution system. Even though the source water was shown to seed the drinking water microbiome, treatment process operations limit the source water’s influence on the distribution system bacterial community. Rather, in this plant, filtration by dual media rapid sand filters played a primary role in shaping the distribution system bacterial community over seasonal time scales as the filters harbored a stable bacterial community that seeded the water treatment processes past filtration. Bacterial taxa that colonized the filter and sloughed off in the filter effluent were able to persist in the distribution system despite disinfection of finished water by chloramination and filter backwashing with chloraminated backwash water. Thus, filter colonization presents a possible ecological survival strategy for bacterial communities in drinking water systems, which presents an opportunity to control the drinking water microbiome by manipulating the filter microbial community. Grouping bacterial taxa based on their association with the filter helped to elucidate relationships between the abundance of bacterial groups and water quality parameters and showed that pH was the strongest regulator of the bacterial community in the sampled drinking water system.
<br/>来源：生物谷
</div>
</div>
</div>
和一般大众的想法相反，来自家庭水龙头的可饮用纯净水包含了数以百万计的不同细菌（每加仑），然而科学家近日开发了一种新的方法来“操纵”水中的有益细菌，使其给饮水者带来健康效应，避免其感染。这项研究刊登在了ACS旗下的杂志<em>Environment Science & Technology</em>上。
研究者Lutgarde解释道，市政污水处理厂尽力去减少过滤器中细菌的生存的同时，其也会去除一些颗粒和物质，这些东西恰恰是细菌的营养供给，使得细菌可以生长。相应的措施会增加水中的氯或者消毒剂来杀灭细菌以阻止其在水管中生长。尽管如此，当前的技术并不可能完全小鼠饮用水中的细菌，因此研究过滤器和其它的水处理设施如何影响细菌的类型显得尤为重要，这也就是研究者开展此项研究的初衷。
<!--more-->
研究者的研究提供了一些建议，关于如何终结饮用水中的细菌的一些策略。科学家们发现特定类型的细菌吸附于过滤器中，在过滤器中细菌可以产生生物被膜，从而使其进入饮用水中，引发人类的感染。水体的PH值就是指示细菌进入饮用水的一个典型的指标，改变水体PH值或者清理过滤器可以有效改变有益和有害细菌的比率，从而降低有害细菌感染人类。
编译自：<a title="" href="http://www.sciencedaily.com/releases/2012/08/120808121820.htm" target="_blank">Leveraging Bacteria in Drinking Water to Benefit Consumers</a>
<div id="ztload">
<div> </div>
<div>
<div>
<img src="http://www.bioon.com/biology/UploadFiles/201208/2012080922250947.jpg" alt="" width="113" height="149" border="0" />
<a title="" href="http://dx.doi.org/doi:10.1021/es302042t" target="_blank">doi:10.1021/es302042t</a>
PMC:
PMID:
</div>
<div>
<br/><strong>Bacterial Community Structure in the Drinking Water Microbiome Is Governed by Filtration Processes</strong><br/>
Ameet J. Pinto†, Chuanwu Xi‡, and Lutgarde Raskin†*
The bacterial community structure of a drinking water microbiome was characterized over three seasons using 16S rRNA gene based pyrosequencing of samples obtained from source water (a mix of a groundwater and a surface water), different points in a drinking water plant operated to treat this source water, and in the associated drinking water distribution system. Even though the source water was shown to seed the drinking water microbiome, treatment process operations limit the source water’s influence on the distribution system bacterial community. Rather, in this plant, filtration by dual media rapid sand filters played a primary role in shaping the distribution system bacterial community over seasonal time scales as the filters harbored a stable bacterial community that seeded the water treatment processes past filtration. Bacterial taxa that colonized the filter and sloughed off in the filter effluent were able to persist in the distribution system despite disinfection of finished water by chloramination and filter backwashing with chloraminated backwash water. Thus, filter colonization presents a possible ecological survival strategy for bacterial communities in drinking water systems, which presents an opportunity to control the drinking water microbiome by manipulating the filter microbial community. Grouping bacterial taxa based on their association with the filter helped to elucidate relationships between the abundance of bacterial groups and water quality parameters and showed that pH was the strongest regulator of the bacterial community in the sampled drinking water system.
<br/>来源：生物谷
</div>
</div>
</div>
还没有人评论，赶快抢个沙发