<?xml version="1.0" encoding="utf-8"?>
<export-example>
  <doc>
    <id>13933</id>
    <completedYear/>
    <publishedYear>2014</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>609</pageFirst>
    <pageLast>617</pageLast>
    <pageNumber/>
    <edition/>
    <issue>6</issue>
    <volume>6</volume>
    <type>articler</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2015-03-10</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Comparative Study of Different Methods for Analyzing Denitrifying Bacteria in Fresh Water Ecosystems</title>
    <abstract language="eng">Bacteria capable of denitrification play a significant role in the nitrogen cycle of freshwater ecosystems.&#13;
By metabolizing nitrogen compounds they e.g. counteract the eutrophication of natural&#13;
waters. To get detailed insights into the in situ turnover rates of nitrogen a reliable tool of quantification&#13;
for active microorganisms is essential. In the present investigation, quantification capabilities&#13;
of a molecular tool (Polymerase Chain Reaction—PCR) and a cultivation based tool (Most&#13;
probable number—MPN) were investigated and compared. The total bacterial concentration&#13;
yielded by the molecular PCR approach was up to 6-fold higher compared to the results of the MPN&#13;
approach. However, the portion of culturable denitrifying bacteria compared to the number of&#13;
specific gene copies (nirS) was much lower. Depending on the environmental conditions, the difference&#13;
between the PCR and the MPN approach was up to three orders of magnitude. From lab&#13;
scale experiments with a pure P. aeroginosa strain it can be concludes, that these differences are&#13;
not the result of inappropriate culture conditions but rather reflect the portion of so called viable&#13;
but not culturable bacteria (VBNC). Low nitrate concentrations as found in many fresh water ecosystems&#13;
induced a significant increase in the portion of non culturable denitrifying bacteria. Referred&#13;
to the investigation of dynamic populations, the number of metabolic active bacteria is&#13;
represented by the MPN rather than by the PCR approach.</abstract>
    <parentTitle language="eng">Journal of Water Resource and Protection</parentTitle>
    <identifier type="issn">1945-3094</identifier>
    <identifier type="issn">1945-3108</identifier>
    <enrichment key="BTU">an der BTU erstellt / created at BTU</enrichment>
    <author>
      <firstName>Kristina</firstName>
      <lastName>Rathsack</lastName>
    </author>
    <submitter>
      <firstName>Kristina</firstName>
      <lastName>Rathsack</lastName>
    </submitter>
    <author>
      <firstName>Jörg</firstName>
      <lastName>Böllmann</lastName>
    </author>
    <author>
      <firstName>Marion</firstName>
      <lastName>Martienssen</lastName>
    </author>
    <collection role="old_institute" number="04010">LS Biotechnologie der Wasseraufbereitung</collection>
    <collection role="institutes" number="2305">FG Biotechnologie der Wasseraufbereitung</collection>
  </doc>
  <doc>
    <id>14378</id>
    <completedYear/>
    <publishedYear>2001</publishedYear>
    <thesisYearAccepted/>
    <language>deu</language>
    <pageFirst>207</pageFirst>
    <pageLast>225</pageLast>
    <pageNumber/>
    <edition/>
    <issue>3</issue>
    <volume>21</volume>
    <type>articler</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2015-06-18</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="deu">Surface properties of bacteria from different waste water treatment plants</title>
    <parentTitle language="eng">Acta Biotechnologica</parentTitle>
    <enrichment key="BTU">nicht an der BTU erstellt / not created at BTU</enrichment>
    <author>
      <firstName>Marion</firstName>
      <lastName>Martienssen</lastName>
    </author>
    <submitter>
      <firstName>Marion</firstName>
      <lastName>Kretzschmar</lastName>
    </submitter>
    <author>
      <firstName>O.</firstName>
      <lastName>Reichel</lastName>
    </author>
    <author>
      <firstName>U.</firstName>
      <lastName>Kohlweyer</lastName>
    </author>
    <collection role="old_institute" number="04010">LS Biotechnologie der Wasseraufbereitung</collection>
    <collection role="institutes" number="2305">FG Biotechnologie der Wasseraufbereitung</collection>
  </doc>
  <doc>
    <id>14387</id>
    <completedYear/>
    <publishedYear>2008</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>133</pageFirst>
    <pageLast>146</pageLast>
    <pageNumber/>
    <edition/>
    <issue>3</issue>
    <volume>13</volume>
    <type>articler</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2015-06-18</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Contaminant mass flow rates between groundwater, strembed sediments and surface water at the regionally contaminated site Bitterfeld</title>
    <parentTitle language="eng">Grundwasser</parentTitle>
    <identifier type="issn">1430-483X</identifier>
    <enrichment key="BTU">an der BTU erstellt / created at BTU</enrichment>
    <enrichment key="UBICOIdent">005570</enrichment>
    <enrichment key="UBICOquelle">Grundwasser 13(2008)3, S. 133-146</enrichment>
    <author>
      <firstName>Christian</firstName>
      <lastName>Schmidt</lastName>
    </author>
    <submitter>
      <firstName>Marion</firstName>
      <lastName>Kretzschmar</lastName>
    </submitter>
    <author>
      <firstName>Edda</firstName>
      <lastName>Kalbus</lastName>
    </author>
    <author>
      <firstName>Ronald</firstName>
      <lastName>Krieg</lastName>
    </author>
    <author>
      <firstName>Marti</firstName>
      <lastName>Bayer-Raich</lastName>
    </author>
    <author>
      <firstName>Sebastian</firstName>
      <lastName>Leschik</lastName>
    </author>
    <author>
      <firstName>Frido</firstName>
      <lastName>Reinstorf</lastName>
    </author>
    <author>
      <firstName>Marion</firstName>
      <lastName>Martienssen</lastName>
    </author>
    <author>
      <firstName>Mario</firstName>
      <lastName>Schirmer</lastName>
    </author>
    <collection role="old_institute" number="04010">LS Biotechnologie der Wasseraufbereitung</collection>
    <collection role="institutes" number="2305">FG Biotechnologie der Wasseraufbereitung</collection>
  </doc>
  <doc>
    <id>14388</id>
    <completedYear/>
    <publishedYear>2008</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>971</pageFirst>
    <pageLast>1001</pageLast>
    <pageNumber/>
    <edition/>
    <issue>2</issue>
    <volume>5</volume>
    <type>articler</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2015-06-18</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">The influence of heterogeneous groundwater discharge on the timescales of contaminant mass flux from streambed sediments field evidence and long-term predictions</title>
    <parentTitle language="eng">Hydrology and Earth System Sciences Discussions</parentTitle>
    <identifier type="issn">1812-2116</identifier>
    <enrichment key="BTU">an der BTU erstellt / created at BTU</enrichment>
    <author>
      <firstName>C.</firstName>
      <lastName>Schmidt</lastName>
    </author>
    <submitter>
      <firstName>Marion</firstName>
      <lastName>Kretzschmar</lastName>
    </submitter>
    <author>
      <firstName>Edda</firstName>
      <lastName>Kalbus</lastName>
    </author>
    <author>
      <firstName>Marion</firstName>
      <lastName>Martienssen</lastName>
    </author>
    <author>
      <firstName>Mario</firstName>
      <lastName>Schirmer</lastName>
    </author>
    <collection role="old_institute" number="04010">LS Biotechnologie der Wasseraufbereitung</collection>
    <collection role="institutes" number="2305">FG Biotechnologie der Wasseraufbereitung</collection>
  </doc>
  <doc>
    <id>14844</id>
    <completedYear/>
    <publishedYear>2015</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>15042</pageFirst>
    <pageLast>15048</pageLast>
    <pageNumber/>
    <edition/>
    <issue>4</issue>
    <volume>7</volume>
    <type>articler</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2016-01-12</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Effect of high biowaste moisturie content on phatogens hygienization potential of in-vessel composting technology during compost production</title>
    <parentTitle language="eng">International Journal of Current Research</parentTitle>
    <identifier type="issn">0975-833X</identifier>
    <enrichment key="BTU">an der BTU erstellt / created at BTU</enrichment>
    <author>
      <firstName>Jacob Paul</firstName>
      <lastName>Muhondwa</lastName>
    </author>
    <submitter>
      <firstName>Marion</firstName>
      <lastName>Kretzschmar</lastName>
    </submitter>
    <author>
      <firstName>Marion</firstName>
      <lastName>Martienssen</lastName>
    </author>
    <author>
      <firstName>Marko</firstName>
      <lastName>Burkhardt</lastName>
    </author>
    <collection role="old_institute" number="04010">LS Biotechnologie der Wasseraufbereitung</collection>
    <collection role="institutes" number="2305">FG Biotechnologie der Wasseraufbereitung</collection>
  </doc>
  <doc>
    <id>14845</id>
    <completedYear/>
    <publishedYear>2015</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>203</pageFirst>
    <pageLast>212</pageLast>
    <pageNumber/>
    <edition/>
    <issue>74</issue>
    <volume/>
    <type>articler</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2016-01-12</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Nitrogen transforming community in a horizontal subsurface-flow constructed wetland</title>
    <parentTitle language="eng">Water research</parentTitle>
    <identifier type="issn">1879-2448</identifier>
    <identifier type="doi">0.1016/j.watres.2015.02.018</identifier>
    <enrichment key="BTU">an der BTU erstellt / created at BTU</enrichment>
    <author>
      <firstName>Oksana</firstName>
      <lastName>Coban</lastName>
    </author>
    <submitter>
      <firstName>Marion</firstName>
      <lastName>Kretzschmar</lastName>
    </submitter>
    <author>
      <firstName>Peter</firstName>
      <lastName>Kuschk</lastName>
    </author>
    <author>
      <firstName>Uwe</firstName>
      <lastName>Kappelmeyer</lastName>
    </author>
    <author>
      <firstName>Oliver</firstName>
      <lastName>Spott</lastName>
    </author>
    <author>
      <firstName>Marion</firstName>
      <lastName>Martienssen</lastName>
    </author>
    <author>
      <firstName>Mike S. M.</firstName>
      <lastName>Jetten</lastName>
    </author>
    <author>
      <firstName>Kay</firstName>
      <lastName>Knöller</lastName>
    </author>
    <collection role="old_institute" number="04010">LS Biotechnologie der Wasseraufbereitung</collection>
    <collection role="institutes" number="2305">FG Biotechnologie der Wasseraufbereitung</collection>
  </doc>
  <doc>
    <id>14846</id>
    <completedYear/>
    <publishedYear>2015</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>481</pageFirst>
    <pageLast>488</pageLast>
    <pageNumber/>
    <edition/>
    <issue>2</issue>
    <volume>9</volume>
    <type>articler</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2016-01-12</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Feasibility of Anaerobic Digestion of Potato peels for Biogas as Mitigation of Greenhouse gases Emission Potential</title>
    <parentTitle language="eng">International journal of environmental research</parentTitle>
    <identifier type="issn">1735-6865</identifier>
    <enrichment key="BTU">an der BTU erstellt / created at BTU</enrichment>
    <author>
      <firstName>Jacob Paul</firstName>
      <lastName>Muhondwa</lastName>
    </author>
    <submitter>
      <firstName>Marion</firstName>
      <lastName>Kretzschmar</lastName>
    </submitter>
    <author>
      <firstName>Marion</firstName>
      <lastName>Martienssen</lastName>
    </author>
    <author>
      <firstName>Marko</firstName>
      <lastName>Burkhardt</lastName>
    </author>
    <collection role="old_institute" number="04010">LS Biotechnologie der Wasseraufbereitung</collection>
    <collection role="institutes" number="2305">FG Biotechnologie der Wasseraufbereitung</collection>
  </doc>
  <doc>
    <id>16478</id>
    <completedYear/>
    <publishedYear>2016</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>42</pageFirst>
    <pageLast>47</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume>126</volume>
    <type>articler</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2016-06-07</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">The precision of bacterial quantification techniques on different kinds of environmental samples and the effect of ultrasonic treatment</title>
    <abstract language="eng">The precision of cell number quantification in environmental samples depends on the complexity of the sample and on the applied technique. We compared fluorescence microscopy after filtration, quantification of gene copies and the cultivation based most probable number technique for their precision. We further analyzed the effect of increasing complexity of the sample material on the precision of the different methods by using pure cultures of Pseudomonas aeruginosa, fresh water samples and sediment slurries with and without ultrasonic treatment for analyses. Microscopy reached the highest precision, which was similar between pure cultures and water samples, but lower for sediment samples due to a higher percentage of cells in clusters and flocks. The PCR based quantification was most precise for pure cultures. Water and sediment samples were similar but less precise, which might be caused by the applied DNA extraction techniques. MPN measurements were equally precise for pure cultures and water samples. For sediment slurries the precision was slightly lower. The applied ultrasonic treatment of the slurries dispersed the cell clusters and flocks, increased the precision of microscopical and MPN measurements and also increased the number of potential colony forming units. However, the culturable cell number decreased by half. For MPN quantification of viable cells in samples with a high proportion of clustered cells we therefore recommend an optimization of ultrasonic treatment and a confirmation by microscopy and cultivation to reach highest possible dispersion of the cells with a minimum of inactivation. As a result of these observations we suggest a correction factor for MPN measurements to consider the effect of sonication on complex samples. The results are most likely applicable to other complex samples such as soil or biofilms.</abstract>
    <parentTitle language="eng">Journal of Microbiological Methods</parentTitle>
    <identifier type="doi">10.1016/j.mimet.2016.05.006</identifier>
    <identifier type="issn">0167-7012</identifier>
    <enrichment key="BTU">an der BTU erstellt / created at BTU</enrichment>
    <author>
      <firstName>Jörg</firstName>
      <lastName>Böllmann</lastName>
    </author>
    <submitter>
      <firstName>Jörg</firstName>
      <lastName>Böllmann</lastName>
    </submitter>
    <author>
      <firstName>Kristina</firstName>
      <lastName>Rathsack</lastName>
    </author>
    <author>
      <firstName>Marion</firstName>
      <lastName>Martienssen</lastName>
    </author>
    <collection role="institutes" number="2305">FG Biotechnologie der Wasseraufbereitung</collection>
  </doc>
  <doc>
    <id>18465</id>
    <completedYear/>
    <publishedYear>2016</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>01</pageFirst>
    <pageLast>06</pageLast>
    <pageNumber/>
    <edition/>
    <issue>3</issue>
    <volume>5</volume>
    <type>articler</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2017-02-03</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Millennium development goal on sustainable sanitation in Ghana: A reality or a mirage?</title>
    <parentTitle language="eng">African Journal of science and research</parentTitle>
    <identifier type="issn">2306-5877</identifier>
    <enrichment key="BTU">an der BTU erstellt / created at BTU</enrichment>
    <author>
      <firstName>Isaac Mbir</firstName>
      <lastName>Bryant</lastName>
    </author>
    <submitter>
      <firstName>Marion</firstName>
      <lastName>Kretzschmar</lastName>
    </submitter>
    <author>
      <firstName>Marion</firstName>
      <lastName>Martienssen</lastName>
    </author>
    <author>
      <firstName>Marko</firstName>
      <lastName>Burkhardt</lastName>
    </author>
    <collection role="institutes" number="2305">FG Biotechnologie der Wasseraufbereitung</collection>
  </doc>
  <doc>
    <id>19168</id>
    <completedYear/>
    <publishedYear>2016</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>1911</pageFirst>
    <pageLast>1918</pageLast>
    <pageNumber/>
    <edition/>
    <issue>8</issue>
    <volume>74</volume>
    <type>articler</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2017-03-10</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Highly efficient long-term storage of carrier-bound anammox biomass</title>
    <abstract language="eng">The anammox process is a potential alternative to the conventional nitrogen removal from wastewater. However, due to large generation times of anammox bacteria, the start-up of treatment reactors may be impeded. An efficient storage technique can handle this drawback and may be also suitable for seasonally operated treatment plants like in touristic areas. In the current study, several storage techniques were investigated with respect to its suitability for the&#13;
preservation of the specific anammox activity after long-term storage. Storing conditions differed in terms of temperature, redox buffer and nutrient supplementation. The specific activity of immobilized anammox bacteria (Candidatus Kuenenia stuttgartiensis) was determined three times during a long-term preservation of 78 days and 106 days, respectively. The highest activity was ensured at a storing temperature of 4 WC, providing nitrate as redox buffer and a nutrient&#13;
supplement every 23 days. Thus, 91.4% of the initial anammox activity could be preserved after a storage of 106 days. Superiority of the presented treatment condition was confirmed by a calculated nitrate-ammonium consumption rate close to the optimal ratio of 1.32. This technique&#13;
provided an economical and simple method suitable for long-term storage of immobilized anammox biomass.</abstract>
    <parentTitle language="eng">Water Science &amp; Technology</parentTitle>
    <identifier type="doi">10.2166/wst.2016.364</identifier>
    <identifier type="issn">0273-1223</identifier>
    <identifier type="issn">1996-9732</identifier>
    <enrichment key="BTU">an der BTU erstellt / created at BTU</enrichment>
    <author>
      <firstName>Steffen</firstName>
      <lastName>Engelbrecht</lastName>
    </author>
    <submitter>
      <firstName>Steffen</firstName>
      <lastName>Engelbrecht</lastName>
    </submitter>
    <author>
      <firstName>Mbengamina Terence</firstName>
      <lastName>Fondengcap</lastName>
    </author>
    <author>
      <firstName>Marion</firstName>
      <lastName>Martienssen</lastName>
    </author>
    <author>
      <firstName>Kristina</firstName>
      <lastName>Rathsack</lastName>
    </author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>anammox</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>biofilm</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Candidatus Kuenenia stuttgartiensis</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>long-term storage</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>reactivation</value>
    </subject>
    <collection role="institutes" number="2305">FG Biotechnologie der Wasseraufbereitung</collection>
  </doc>
</export-example>
