FG Umweltmikrobiologie

21 Items

Recent Submissions
Cylindrospermopsin transformation by manganese-oxidizing bacteria

Martínez Ruiz, Erika Berenice (2021)

Cylindrospermopsin is a highly persistent and toxic alkaloid toxin produced by cyanobacteria. Information regarding biological transformation of cylindrospermopsin is scarce, only a few cylindrospermopsin -removing microbial isolates and communities have been described, and so far, transformation products of biological processes have not been identified. Owing to the ability to remove a variety...

Impact of management measures on the biogas microbiome on the example of feedstock changes

Klang, Eva Johanna (2021)

Regarding the current political and social-economic situation, the biogas industry in Germany is standing at a crossroad as a transition to a residue-based biogas production is imminent. In future biogas plants, the microbial communities will often be exposed to varying process conditions while an overall stable process has to be ensured. Hence an understanding of how biogas microbiomes respons...

Charakterisierung des Tigecyclinresistenzmechanismus in Enterococcus faecium und Enterococcus faecalis

Fiedler, Stefan (2020)

Tigecyclin ist ein Reserveantibiotikum der Stoffklasse der Glycylcycline und ein Tetracyclinderivat. Es findet Anwendung bei der Behandlung von Infektionen mit MRSA, VRE und gramnegativen Bakterien. Im NRZ für Staphylokokken und Enterokokken sind zwischen 2010 und 2015 über 90 tigecyclinresistente E.-faecium- und E.-faecalis-Isolate eingegangen. Aufgrund der umfangreichen Stammsammlung und des ...

Antibiotic resistance and dissemination in MRSA: novel antimicrobial coatings to combat a clinical MRSA strain

Vaishampayan, Ankita (2020)

Bacterial resistance to antibiotics and spread of antibiotic resistance, especially among pathogens is one of the biggest problems today. It is not only a serious concern in the clinical and environmental settings but also in space, on manned space crafts. Bacteria use horizontal gene transfer, a highly effective mechanism for dissemination of antibiotic resistance. Some bacteria like methicill...

Effects of micropollutants on the Panke River microbial communities and degradation of selected pharmaceuticals by manganese-oxidizing bacteria

Nega, Marcella (2020)

Pharmaceuticals and other anthropogenic substances are detectable worldwide in trace concentrations in surface waters since they are only partially retained in wastewater treatment plants (WWTPs). In metropolitan areas, high consumption rates of pharmaceuticals can induce an increase of organic compounds in surface waters, and these biologically active compounds can be a burden to aquatic envir...

Effect of a Profound Feedstock Change on the Structure and Performance of Biogas Microbiomes

Klang, Johanna ; Szewzyk, Ulrich ; Bock, Daniel ; Theuerl, Susanne (2020-01-25)

In this study the response of biogas-producing microbiomes to a profound feedstock change was investigated. The microbiomes were adapted to the digestion of either 100% sugar beet, maize silage, or of the silages with elevated amounts of total ammonium nitrogen (TAN) by adding ammonium carbonate or animal manure. The feedstock exchange resulted in a short-range decrease or increase in the bioga...

Neutrophile Eisenbakterien

Schmidt, Bertram (2019)

The aim of this work was to study a group of bacteria, which has been investigated since many years but still remains mysterious: the neutrophilic iron bacteria. These were explored on the one hand in their natural habitats, which were places in the National Park "Lower Oder Valley" in Germany and newly found sites on the island Tierra del Fuego in Argentina. Furthermore there was the opportuni...

Entwicklung eines Frühwarnsystems zur Steigerung der Raum-Zeit-Ausbeute einstufiger NawaRo-Biogasanlagen durch Additivzugabe

Schröder, Patrick (2018)

Zur Steigerung der Raum-Zeit-Ausbeute in einstufigen, landwirtschaftlichen Biogasanlagen wurden Versuche zur Entwicklung von Frühwarnindikatoren (FWI) für Prozessstörungen und von Maßnahmen zur Prozessstabilisierung, sowie zur Substratzusammensetzung durchgeführt. Ein neuer FWI wurde entwickelt, der A/elCon, das Verhältnis aus der Konzentration organischer Säuren (engl.: org. acids) zur elektr...

Draft genome sequence of strain B 225, an iron-depositing isolate of the genus Novosphingobium

Braun, Burga ; Künzel, Sven ; Szewzyka, Ulrich (2018-04-12)

Here, we report the draft genome sequence of Novosphingobium sp. strain B 225, an iron-depositing bacterium isolated from a phenazone-amended naturally grown biofilm. This biofilm was grown in the Unteres Odertal National Park, Germany. Illumina NextSeq sequencing was used to determine the genome of the strain.

Draft genome sequence of actinobacterial strain Kineosporia sp. R_H_3, a neutrophilic iron-depositing bacterium

Braun, Burga ; Künzel, Sven ; Schröder, Josephin ; Szewzyk, Ulrich (2018-04-12)

The draft genome sequence of a neutrophilic iron-depositing actinobacterial strain, Kineosporia sp. R_H_3, is reported here. Detailed analysis of the genome can elucidate the role of specific cytochromes for Fe oxidation and how this organism might receive energy from Fe oxidation. To date, this is the second publicly available genome sequence of a Kineosporia strain.

Microbial population composition of ochrous biofilms and water samples obtained from technical groundwater-fed systems

Schröder, Josephin (2018)

This study assessed the abundance, composition, diversity and functional organisation of bacterial communities correlated to chemical water parameters in four technical groundwater-fed systems. Each sampling site was vulnerable to iron-clogging and was characterised by its own specific technical and hydrochemical conditions. Biofilm and groundwater samples were obtained and compared for drinkin...

Draft Genome Sequence of a Potential Nitrate-Dependent Fe(II)-Oxidizing Bacterium, Aquabacterium parvum B6

Zhang, Xiaoxin ; Ma, Fang ; Szewzyk, Ulrich (2016)

Aquabacterium parvum B6 is a potential nitrate-dependent Fe(II)-oxidizing bacterium. The genes related to its denitrifying mechanism and iron metabolisms were unknown. We present the draft genome of Aquabacterium parvum B6, which could provide further insight into the nitrate-dependent Fe(II)-oxidizing mechanism of strain B6.

Complete Genome Sequence of “Candidatus Viadribacter manganicus” Isolated from a German Floodplain Area

Braun, Burga ; Szewzyk, Ulrich (2016)

Iron- and manganese-depositing bacteria occur in many soils and all water systems, and their biogenic depositions of ochre in technical systems may cause severe clogging problems and monetary losses. “Candidatus Viadribacter manganicus” is a small coccoid, iron- and manganese-depositing bacterium isolated from the Lower Oder Valley National Park, Germany.

Draft Genome Sequence of Rheinheimera sp. Strain SA_1 Isolated from Iron Backwash Sludge in Germany

Schröder, Josephin ; Braun, Burga ; Liere, Karsten ; Szewzyk, Ulrich (2016)

Rheinheimera sp. strain SA_1 is an iron-depositing bacterium for which we report a draft genome sequence. Strain SA_1 was isolated from iron backwash sludge of a waterworks in Germany. The Illumina MiSeq technique was used to sequence the genome of the strain.

Draft Genome Sequence of Ideonella sp. Strain A 288, Isolated from an Iron-Precipitating Biofilm

Braun, Burga ; Künzel, Sven ; Szewzyk, Ulrich (2017)

Here, we report the draft genome sequence of the betaproteobacterium Ideonella sp. strain A_228. This isolate, obtained from a bog iron ore-containing floodplain area in Germany, provides valuable information about the genetic diversity of neutrophilic iron-depositing bacteria. The Illumina NextSeq technique was used to sequence the draft genome sequence of the strain.

Draft Genome Sequence of the Gram-Positive Neutrophilic Iron-Precipitating Kineosporia sp. Strain A_224

Braun, Burga ; Künzel, Sven ; Szewzyk, Ulrich (2017)

We report here the draft genome sequence of the neutrophilic iron-precipitating Kineosporia sp. strain A_224. Analysis of the predicted genes may improve our knowledge of its role in ochrous formations in natural and technical water systems. This is the first public genome sequence of a Kineosporia aurantiaca strain.

Draft Genome Sequence of Rheinheimera sp. F8, a Biofilm-Forming Strain Which Produces Large Amounts of Extracellular DNA

Schuster, Anna-Kathrin ; Szewzyk, Ulrich (2016)

Rheinheimera sp. strain F8 is a biofilm-forming gammaproteobacterium that has been found to produce large amounts of filamentous extracellular DNA. Here, we announce the de novo assembly of its genome. It is estimated to be 4,464,511 bp in length, with 3,970 protein-coding sequences and 92 RNA-coding sequences.

Zum Verhalten ausgewählter Triazolfungizide in der Umwelt und unter technischen Bedingungen

Mülow-Stollin, Ulrike (2018)

In order to ensure acceptable crop yield the use of plant protection products is inevitable. Triazole fungicides are a class of pesticides often used against a variety of fungal diseases in plants. During application an involuntary introduction into soil and surface water is possible, as well as a subsequent leaching into groundwater. In these environmental compartments the fungicides are s...

Production of extracellular DNA (eDNA) of the γ-Proteobacterium Rheinheimera sp. F8 in biofilms

Schuster, Anna-Kathrin (2017)

Abstract F8 is a gram-negative γ-Proteobacterium, which belongs to the genus Rheinheimera. The strain has been isolated from the South Saskatchewan River in Canada (Böckelmann, 2002). It has been discovered in previous studies that F8 releases DNA into the extracellular space (Böckelmann et al., 2006; Böckelmann et al., 2007). The aim of this study was a more detailed analysis of the F8 extrace...

Provision of water by halite deliquescence for Nostoc commune biofilms under Mars relevant surface conditions

Jänchen, Jochen ; Feyh, Nina ; Szewzyk, Ulrich ; Vera, Jean-Pierre Paul de (2015)

Motivated by findings of new mineral related water sources for organisms under extremely dry conditions on Earth we studied in an interdisciplinary approach the water sorption behaviour of halite, soil component and terrestrial Nostoc commune biofilm under Mars relevant environmental conditions. Physicochemical methods served for the determination of water sorption equilibrium data and survival...