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        <h1 class="header center teal-text text-lighten-2">Micro Holmes</h1>
 
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          <h5 class="header col s12 "> <span class="light-blue-text text-accent-4"> A Novel Device for Monitoring Heavy Metal Ions</span></h5>
 
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          <a href="http://7xlnim.com1.z0.glb.clouddn.com/igemshipin.mp4" class="btn-large waves-effect waves-light teal lighten-1">Watch video</a>
 
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            <h4 class="center">Abstract</h4>
 
  
            <p class="light">With the global industrialization, heavy metal ions have become significant factors of water pollution, which may cause serious damage to human health. However, the devices to measure the concentration of heavy metals are complex and expensive. Therefore, the aim of our project was to create a cheaper and portable device. In our project, we have applied several transcription factors which are sensitive to the concentration of copper ions and chromium ions to regulate the expression of protein ribB.<em>RibB</em> will enhance the production of riboflavin. Riboflavin, as the electron carrier, improves the electricity producing performance of the Microbial Fuel Cells (MFCs). So in this way, we successfully correlated the concentration of heavy metal ions together with the output voltage of the MFC. This process is used within a convenient new device we created, Micro Holmes (a combination of MFC and electronic components), to monitor heavy metal ions in water sample any place any time.</p>
 
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          <strong><span class="light-blue-text text-accent-4">Contents</span></strong>
 
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                 <li><a href="badges">Notes</a></li>
                  <p><a href="https://2015.igem.org/Team:LZU-China/Practices"><span class="light-green-text text-darken-4"><strong>For more details</strong></span> </a></p>
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                 <li><a href="badges">Collaboration</a></li>
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                  <span class="card-title grey-text text-darken-4">Human Practice<i class="material-icons right">close</i></span>
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                  <p>We've done an investigation about water pollution in the past few months. Through street interviews and online questionnaires,369 valid replies were collected from 9 countries. Here's the conclusion: Although different countries have varying degrees of water pollution, people are uniformly worried about this. Accordingly, there is support, and even demand for a method that is both cheap and convenient to tell them whether their water is safe to drink. And that's the reason for this project.</p>
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                  <a href="https://2015.igem.org/Team:LZU-China/Practices"><span class="blue-text text-darken-2">more details</span></a>
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                  <p><a href="https://2015.igem.org/Team:LZU-China/project#wetlab"><span class="light-green-text text-darken-4"><strong>For more details</strong></span></a></p>
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                  <p>We had constructed 14 different parts. All of them, including several ion sensors, have <em>ribB</em> CDS. Our experiments confirmed that the expression degree of <em>ribB</em> can influence the riboflavin production. Then we took them into MFC and the voltage showed that our genetically engineered E.coli responded to the change of Cu<sup>2+</sup> concentration. Thus we linked the concentration of metal ion to the electricity production.</p>
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                  <a href="https://2015.igem.org/Team:LZU-China/project#wetlab"><span class="blue-text text-darken-2">more details</span></a>
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                  <p><a href="https://2015.igem.org/Team:LZU-China/project#drylab"><span class="light-green-text text-darken-4"><strong>For more details</strong></span></a></p>
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                  <span class="card-title grey-text text-darken-4">Dry Lab<i class="material-icons right">close</i></span>
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                  <p>Based on the wet lab results, we constructed the Micro Holmes concentration measurement system' which contained a Microbial Fuel Cell, a Microprogrammed Control Unit, a voltage magnification circuit board, an Analogue-to-Digital Conversion chip, a set of input and output devices and one or several kinds of bacteria.</p>
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                  <a href="https://2015.igem.org/Team:LZU-China/project#drylab"><span class="blue-text text-darken-2">more details</span></a>
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          Main
 
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<h6>&nbsp;</h6>
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                  Project Description
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      <div class="collapsible-header"><i class="material-icons">place</i> <p><h5>1.The new application of <em>ribB</em></h5></p></div>
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      <div class="collapsible-body"><p>ribB protein is able to increase and stabilize electrical current generated by microbial fuel cells. Expression level of <em>ribB</em> is correlated with MFC voltage.</p></div>
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      <div class="collapsible-header"><i class="material-icons">place</i><p><h5>2.Heavy metals sensors</h5></p></div>
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      <div class="collapsible-body"><p>Copper, Mercury, zinc, chromium sensors were used to regulate <em>ribB</em> gene's expression in bio-engineered strains and concentrations of heavy metals are correlated with <em>ribB</em> protein production. </p></div>
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      <div class="collapsible-header"><i class="material-icons">place</i><p><h5>3.MFC voltage correlated with heavy metal ions</h5></p></div>
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      <div class="collapsible-body"><p>When grown our bio-engineered strains in the anode of MFC, voltage is correlated with heavy metal ion concentration.</p></div>
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      <div class="collapsible-header"><i class="material-icons">place</i><p><h5>4.A novel device for heavy metal ion detection/measurement</h5></p> </div>
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      <div class="collapsible-body"><p>A novel device for heavy metal ion detection/measurement has been developed based on our findings. Comparing to current heavy metal measurement instruments, our device is simpler, cheaper and easier to use.</p></div>
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      <div class="collapsible-header"><i class="material-icons">place</i><p><h5>5.An innovative Human Practices activity</h5></p></div>
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      <div class="collapsible-body"><p>Through street interview and online questionnaires, 369 valid replies were collected from 30 provinces in China, and 9 different foreign countries. What's more the innovative public education activity garnered a huge response.</p></div>
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<h6>&nbsp;</h6>
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        <h2 class="header col s12 light white-text"><strong><span class="light-blue-text text-accent-4">Medal Fullfillment</span></strong></h2>
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        </div>
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      </div>
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    </div>
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    <div class="parallax"><img src="https://static.igem.org/mediawiki/2015/c/c9/LZU-China-2015-modal.png" alt="Unsplashed background img 3"></div>
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<div class="container">
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                     <span class="card-title">Bronze</span>
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                   </div>
 
                   </div>
                   <div class="card-content">
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                   <div class="col s3 l3">
 +
                    <img src="http://of5b4n94d.bkt.clouddn.com/img/main/LanZhou16_background_bike.png" style="margin-right: 17.6%;margin-left:37.6% ">
 +
                   
 
                   </div>
 
                   </div>
                   <div class="card-action">
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                   <div class="col s3 l3">
                      <ul class="collapsible popout" data-collapsible="accordion">
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                    <img src="http://of5b4n94d.bkt.clouddn.com/img/main/LanZhou16_background_bookshelf.png" style="margin-right: 37.6%;margin-left:17.6% " >
                        <li>
+
                   
                          <div class="collapsible-header"><i class="material-icons">done</i><p><strong>Register the team</strong></p></div>
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                          <div class="collapsible-body"><p>The team <a href="https://igem.org/Team.cgi?year=2015&team_name=LZU-China">LZU-China</a> has been registered successfully. </p></div>
+
                        </li>
+
                        <li>
+
                          <div class="collapsible-header"><i class="material-icons">done</i><p><strong>Judging form</strong></p></div>
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                          <div class="collapsible-body"><p>Our <a href="https://igem.org/2015_Judging_Form?id=1755">Judging form</a></p></div>
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                        </li>
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                        <li>
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                          <div class="collapsible-header"><i class="material-icons">done</i><p><strong>Team wiki</strong></p></div>
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                          <div class="collapsible-body"><p>You are reading our team wiki now.</p></div>
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                        </li>
+
                        <li>
+
                          <div class="collapsible-header"><i class="material-icons">done</i><p><strong>Poster and Talk</strong></p></div>
+
                          <div class="collapsible-body"><p>Our Poster will be exhibited in the Hynes Convention Center during the Giant Jamboree. And the presentation will be given in Room 312 Sep. 26, 2:00 pm</p></div>
+
                        </li>
+
                        <li>
+
                          <div class="collapsible-header"><i class="material-icons">done</i><p><strong>Attribution page</strong></p></div>
+
                          <div class="collapsible-body"><p>Click here to see our<a href="https://igem.org/Team.cgi?year=2015&team_name=LZU-China"> Attribution page.</a></p></div>
+
                        </li>
+
                        <li>
+
                          <div class="collapsible-header"><i class="material-icons">done</i><p><strong>Document parts</strong></p></div>
+
                          <div class="collapsible-body"><p><a href="http://parts.igem.org/Part:BBa_K1755001">BBa_K1755001</a><br/> <a href="http://parts.igem.org/Part:BBa_K1755005">BBa_K1755005</a> <br/><a href="http://parts.igem.org/Part:BBa_K1755006">BBa_K1755006</a><br/><a href="http://parts.igem.org/Part:BBa_K1755007">BBa_K1755007</a><br/><a href="https://2015.igem.org/Team:LZU-China/Parts">Our parts on wiki</a> </p></div>
+
                        </li>
+
                      </ul>
+
 
                   </div>
 
                   </div>
                </div>
+
                  <div class="col s3 l3">
  </div>
+
                     <img src="http://of5b4n94d.bkt.clouddn.com/img/main/LanZhou16_background_brightness.png" style="margin-right: 47.6%;margin-left:7.6% ">
 
+
                      
 
+
  <div class="col s12 m4 l4">
+
      <div class="card">
+
                  <div class="card-image">
+
                     <img src="https://static.igem.org/mediawiki/2015/1/15/LZU-China-2015-silver.jpg">
+
                    <span class="card-title">Sliver</span>
+
                  </div>
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                  <div class="card-content">
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                  </div>
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                  <div class="card-action">
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                      <ul class="collapsible popout" data-collapsible="accordion">
+
                        <li>
+
                          <div class="collapsible-header"><i class="material-icons">done</i><p><strong>New parts</strong></p></div>
+
                          <div class="collapsible-body"><p><a href="http://parts.igem.org/Part:BBa_K1755301">BBa_K1755301</a> <br/>
+
                          <a href="http://parts.igem.org/Part:BBa_K1755302">BBa_K1755302</a></p></div>
+
                        </li>
+
                        <li>
+
                          <div class="collapsible-header"><i class="material-icons">done</i><p><strong>Interlab Study</strong></p></div>
+
                          <div class="collapsible-body"><p>We have participated the <a href="https://2015.igem.org/Team:LZU-China/project#interlab">Interlab Study</a>  and documented the data.</p></div>
+
                        </li>
+
                        <li>
+
                          <div class="collapsible-header"><i class="material-icons">done</i><p><strong>Human Practices</strong></p></div>
+
                          <div class="collapsible-body"><p>We have investigated and addressed the issues related to water safety especially about water pollution.
+
                          <br/><a href="https://2015.igem.org/Team:LZU-China/Practices">More details </a>
+
                          </p></div>
+
                        </li>
+
                      </ul>
+
                  </div>
+
                </div>
+
  </div>
+
 
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  <div class="col s12 m4 l4">
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      <div class="card">
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                  <div class="card-image">
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                    <img src="https://static.igem.org/mediawiki/2015/d/d0/LZU-China-2015-gold.jpg">
+
                     <span class="card-title">Gold</span>
+
                  </div>
+
                  <div class="card-content">
+
                  </div>
+
                  <div class="card-action">
+
                      <ul class="collapsible popout" data-collapsible="accordion">
+
                        <li>
+
                          <div class="collapsible-header"><i class="material-icons">done</i><p><strong>Improvement</strong></p></div>
+
                          <div class="collapsible-body"><p>We constructed the cheap and convenient device to measure the pollution.</br>
+
                          <a href="https://2015.igem.org/Team:LZU-China/project#parts">More details</a></p>
+
                          </div>
+
                        </li>
+
                        <li>
+
                          <div class="collapsible-header"><i class="material-icons">done</i><p><strong>Portability</strong></p></div>
+
                          <div class="collapsible-body"><p>The accessibility and portability have been demonstrated by other teams.</br>
+
                          <a href="https://2015.igem.org/Team:LZU-China/project#Accessibility and portability">More details</a></p>
+
                          </div>
+
                        </li>
+
                        <li>
+
                          <div class="collapsible-header"><i class="material-icons">done</i><p><strong>Innovative H.P.</strong></p></div>
+
                          <div class="collapsible-body"><p>hrough street interview and online questionnaires, 369 valid replies were collected from 30 provinces in China, and 9 different foreign countries. What’s more the innovative public education activity garnered a huge response.<a href="https://2015.igem.org/Team:LZU-China/Practices">More details</a></p></div>
+
                        </li>
+
                        <li>
+
                          <div class="collapsible-header"><i class="material-icons">done</i><p><strong>Collaboration</strong></p></div>
+
                          <div class="collapsible-body"><p>Mentored Shiyan_SY_China<a href="https://2015.igem.org/Team:LZU-China/Collaborations#SHI_SY_CHINA">More details</a><br/>Characterize parts for <a href="https://2015.igem.org/Team:LZU-China/Collaborations#attri">TJU</a>  & <a href="https://2015.igem.org/Team:LZU-China/Collaborations#advis">SZU</a><br/>Help modifying E.coli for TJU<br/>
+
                          <a href="https://2015.igem.org/Team:LZU-China/Collaborations">More details</a></p></div>
+
                        </li>
+
                      </ul>
+
 
                   </div>
 
                   </div>
 
                 </div>
 
                 </div>
 
             </div>
 
             </div>
 
+
            <div class="col s4 l4" style="margin-top: 60px;">
 
+
              <p style="text-align: justify;">
 
+
                <i>Mercury is a poisonous heavy metal that poses a threat to aquatic life and humans. Recently, increasing attention has been paid to mercury remediation and its detection in the environment by biological technology. In our project, a series of mercury-specific binding peptide termed metal catcher (MC), which has a high affinity and selectivity toward mercury, was examined. The subsequent IC and GFP were fused and displayed on Escherichia coli cell surface by using an N-terminal region ice nucleation protein anchor. </i>
  </div>
+
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+
         <div class="col s12 l12">
 
+
           <p style="text-align: justify;">
 
+
            <i>Whole-cell sorbents of construction facilitated selective adsorption of mercury ions from a solution containing different heavy metal ions and detection mercury and cooper. The MC aided rapid detection of copper, mercury, and cadmium in 2 min with a low detection limit (1 uM).Additionally, mercury levels were reduced by approximately 36% by using the MC. The transformant strains were then fed to Cyprinus carpio and colonized in the microbiota. C. carpio with transformants showed significantly lower accumulation of heavy metals compared to the control group. The control group was E. coli BL21 containing a pET23b plasmid without any exogenous gene. Moreover, the metal remediation ability of the microbiota with transformants was improved by Illumina MiSeq 16S rRNA amplicon sequencing. The surface-engineered E. coli effectively protected fish from the toxicity of mercury ions at high concentrations in an aquatic environment. Thus, gut remediation is an ideal approach to control heavy metal contamination in fish.</i>
 
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Latest revision as of 01:55, 18 October 2016


Main Team:LZU 2015

Main

Project Description

Mercury is a poisonous heavy metal that poses a threat to aquatic life and humans. Recently, increasing attention has been paid to mercury remediation and its detection in the environment by biological technology. In our project, a series of mercury-specific binding peptide termed metal catcher (MC), which has a high affinity and selectivity toward mercury, was examined. The subsequent IC and GFP were fused and displayed on Escherichia coli cell surface by using an N-terminal region ice nucleation protein anchor.

Whole-cell sorbents of construction facilitated selective adsorption of mercury ions from a solution containing different heavy metal ions and detection mercury and cooper. The MC aided rapid detection of copper, mercury, and cadmium in 2 min with a low detection limit (1 uM).Additionally, mercury levels were reduced by approximately 36% by using the MC. The transformant strains were then fed to Cyprinus carpio and colonized in the microbiota. C. carpio with transformants showed significantly lower accumulation of heavy metals compared to the control group. The control group was E. coli BL21 containing a pET23b plasmid without any exogenous gene. Moreover, the metal remediation ability of the microbiota with transformants was improved by Illumina MiSeq 16S rRNA amplicon sequencing. The surface-engineered E. coli effectively protected fish from the toxicity of mercury ions at high concentrations in an aquatic environment. Thus, gut remediation is an ideal approach to control heavy metal contamination in fish.

Please Visit Us

Oct. 29th 1:30AM Room 304