Programme

Unfurtunately the monastery Irsee has been closed by the Bavarian government due to the corona virus.

Therefore we have decided to offer the conference as a web conference only.

In those unpredictable times, protecting our participants’ health has the highest priority for us!

The scientific exchange must not come to a complete standstill and we believe that with this web solution we have found a way to keep the scientific community going.

In order to participate in the livestream of the conference as easy as possible and to give your presentation, we recommend the use of the web browsers Google Chrome or Microsoft Edge.

Here you can find detailed instructions for using the livestream.

As a participant of the Bioinspired 2020 you have received an e-mail containing the login data for the web conference.

The login data for the sessions are provided daily.

In order to allow all conference participants access to the posters, we ask you to upload your poster by login on the conference homepage and clicking on the button "My Submission" in the upper right corner of the conference homepage. Then select the submission to which you want to upload the poster and upload the poster at the bottom of the page.

Furthermore we would like to ask all poster authors to prepare 4 PowerPoint slides to present your poster to the audience.
Please also include your contact details on the digital poster to allow participants to reach you with questions.

Please note that your poster will be pictured publically.

As poster author you can upload your poster similar to the way you submitted your abstract.
Click on "My Submissions" in the upper right corner at the homepage.

Poster documents can be found by opening the respective abstract in the online programme.
If a poster document has already been uploaded for the abstract, it can then be opened and downloaded.

Please note that your poster will be pictured publically.

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Please use for this the Q&A (F&A) button!

For further scientific exchange we implemented a discussion forum on the homepage of the DGM.
Please visit discussion.dgm.de and use your DGM or Bioinspired user credentials to login.

Back to overview

Poster with short presentation

Patterns of mineral organization in EPS-hydrogel-calcite composite aggregates: texture based biosignatures of Bacillus subtilis, Mycobacterium phley, Mycobacterium smegmatis, and Pseudomonas putida microorganisms

Monday (16.03.2020)
17:56 - 17:59

For understanding the directing influence of primary biopolymers on composite material formation, we synthesized with Bacillus subtilis, Mycobacterium phley, Mycobacterium smagmatis, Pseudomonas putida EPS composite aggregates and investigated the influence of EPS matrices on calcite organization and composite aggregate formation. Aggregates were characterized with FTIR, FE-SEM and EBSD; the occluded EPS/hydrogel polymers were visualized with selective etching techniques and kernel-misorientation-analysis gained from EBSD data.

Relative to reference aggregates that are devoid of bacterial EPS, composites that contain EPS are reduced in size and show, for the EPS of a specific bacterium, distinctive morphologies. Bacterial EPS/agarose hydrogel distribution within aggregates is inhomogeneous. In P. putida and M. phley composites the occluded polymer is mainly present as membranes, while for M. smagmatis and B. subtilis the occluded biopolymer is developed as membranes and as networks of fibrils. Relative to reference aggregates, subunit formation in EPS/hydrogel-calcite-composites is extensive. These vary significantly in shape, size and mode of organization. For M. smagmatis and B. subtilis subunit organization is radial to spherulitic, for P. putida it is almost random, for M. phley subunit organization is highly co-aligned.

Bacterial EPS changes the microstructure and texture of the composite in a substantial and specific manner. This is a specific characteristic for a given bacterium and can be developed as a tool for the recognition/identification of bacterially mediated calcification in present and past environments (1).

(1) Xiaofei Yin, Florian Weitzel, Concepción Jiménez-López, Erika Griesshaber, Lurdes Fernández-Díaz, Alejandro Rodríguez-Navarro, Andreas Ziegler, Wolfgang. W. Schmahl (2019). The directing effect of bacterial EPS on calcite organization and EPS-carbonate composite aggregate formation, accepted manuscript in Crystal Growth and Design 2019.


 

Speaker:
Dr. Erika Griesshaber
Ludwig-Maximilians-Universität München (LMU)
Additional Authors:
  • Dr. Xiaofei Yin
    Ludwig-Maximilians-Universität München (LMU)
  • Florian Weitzel
    Ludwig-Maximilians-Universität München (LMU)
  • Prof. Lourdes Fernandez-Diaz
    Universidad Complutense de Madrid
  • Prof. Conception Jimenez-Lopez
    Universidad de Granada
  • Dr. Andreas Ziegler
    Universität Ulm
  • Prof. Alejandro Rodríguez-Navarro
    Universidad de Granada

Dateien

Category Short file description File description File Size
Poster Patterns of mineral organization in EPS-hydrogel-calcite composite aggregates: texture based biosignatures of Bacillus subtilis, Mycobacterium phley, Mycobacterium smegmatis, and Pseudomonas putida microorganisms 3 MB Download