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2013

On rapid releases and software testing

Mäntylä, M. , V, Khomh, F., Adams, B., Engström, E., & Petersen, K. (2013). On rapid releases and software testing. In 2013 IEEE International Conference on Software Maintenance (S. 20–29).
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Petersen, Kai

Abteilung/Einrichtung

FLAIR - Flensburg Artificial Intelligence Research
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2013

Conference Paper

Mika Mäntylä V

Foutse Khomh

Bram Adams

Emelie Engström

Kai Petersen
Generalized class invariants with "Thetanullwerte"

Uzunkol, O. (2013). Generalized class invariants with "Thetanullwerte". Turkish Journal of Mathematics, 37, 165–181. http://doi.org/10.3906/mat-1106-4
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Uzunkol, Osmanbey

Fachbereich

Fachbereich 3: Information und Kommunikation
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2013

Journal Article

Osmanbey Uzunkol
Das betörende Blühen der Titanenwurz

Labes, A., Kaiser, H., & Tobin, S. (2013). Das betörende Blühen der Titanenwurz. In Vorträge des Freundeskreis des Botanischen Gartens Kiel. Abgerufen von http://oceanrep.geomar.de/23008/
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2013

Conference Paper

Antje Labes

H. Kaiser

S. Tobin
Improving software security with static automated code analysis in an industry setting

Baca, D., Carlsson, B., Petersen, K., & Lundberg, L. (2013). Improving software security with static automated code analysis in an industry setting. Software: Practice and Experience, 43, 259–279.
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Petersen, Kai

Abteilung/Einrichtung

FLAIR - Flensburg Artificial Intelligence Research
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2013

Journal Article

Dejan Baca

Bengt Carlsson

Kai Petersen

Lars Lundberg
Meeresschätze heben ? mit angewandter Forschung aus Norddeutschland

Labes, A., & Claussen, C. (2013). Meeresschätze heben ? mit angewandter Forschung aus Norddeutschland. In Kieler Salon. Abgerufen von http://oceanrep.geomar.de/23005/
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2013

Conference Paper

Antje Labes

C. Claussen
Development of a miniaturised screening method for fungal mutants with enhanced production of specific natural compounds

Kramer, A., Paun, L., Labes, A., Kempken, F., & Imhoff, J. F. (2013). Development of a miniaturised screening method for fungal mutants with enhanced production of specific natural compounds. In VAAM Jahrestagung 2013. Abgerufen von http://oceanrep.geomar.de/22029/
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2013

Conference Paper

Annemarie Kramer

Linda Paun

Antje Labes

Frank Kempken

Johannes Imhoff
Algae as important environment for bacteria - phylogenetic relationships among species isolated from algae

Goecke, F. R., Thiel, V., Wiese, J., Labes, A., & Imhoff, J. F. (2013). Algae as important environment for bacteria - phylogenetic relationships among species isolated from algae. Phycologia, 52, 14–24. Abgerufen von http://oceanrep.geomar.de/19593/

Abstract

Bacteria are an inherent part of the biotic environment of algae. Recent investigations revealed that bacterial communities associated with algae were generally highly host specific. Several new bacterial species and genera were isolated from algae, which suggested that algae were an interesting environment for discovery of new bacterial taxa; however, the distribution of the different phylogenetic groups among those isolates remained unclear, and this information could help to explain specific associations. We conducted a phylogenetic study based on 16S rRNA gene sequences available in GenBank, including 101 validly described bacterial species that were isolated from eukaryotic macro- and micro-algae from marine and freshwater environments. These species were distributed among six bacterial phyla, including: Bacteroidetes (42 species), Proteobacteria (36 species), and Firmicutes, Actinobacteria, Verrucomicrobia and Planctomycetes (23 species). Bacterial species and strains that carried out similar metabolic functions were found to colonize similar algal taxa or algal groups. This assumption was supported by information available from bacterial species descriptions: (1) Most of the bacteria described from microalgae grouped into the Roseobacter clade (Alphaproteobacteria), which indicated that members of this group were well adapted for life in close association with phytoplankton; and (2) 32\% of the bacterial species, mainly isolates from macroalgae, were able to decompose macroalgal polysaccharides. Because algal-bacterial association are still under-studied in various algal groups, we expect a great number of new bacterial taxa to be discovered in the future.
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2013

Journal Article

Franz Goecke

Vera Thiel

Jutta Wiese

Antje Labes

Johannes Imhoff

Enzyme

Macroalgae

Microbe-alga

Phytoplankton

DINOFLAGELLATE GYMNODINIUM-CATENATUM

MARINE ROSEOBACTER LINEAGE

DISSOLVED ORGANIC-MATTER

IN-SITU HYBRIDIZATION

EPIPHYTIC BACTERIAL

LAMINARIA-JAPONICA

GEN. NOV.

COMMUNITY COMPOSITION

ALEXANDRIUM SPP.

BROWN ALGA
Phylogenetic analysis and antibiotic activity of bacteria isolated from the surface of two co-occurring macroalgae from the Baltic Sea

Goecke, F. R., Labes, A., Wiese, J., & Imhoff, J. F. (2013). Phylogenetic analysis and antibiotic activity of bacteria isolated from the surface of two co-occurring macroalgae from the Baltic Sea. European Journal of Phycology, 48, 47–60. Abgerufen von http://oceanrep.geomar.de/19592/

Abstract

Bacteria associated with Fucus vesiculosus and Delesseria sanguinea, two macroalgae from the Kiel Fjord were investigated seasonally over two years by cultivation-based methods. A total of 166 bacterial strains were isolated from the macroalgae, affiliated to seven classes of bacteria (Actinobacteria, Bacilli, Alphaproteobacteria, Betaproteobacteria, Gammaproteobacteria, Cytophagia and Flavobacteria). According to 16S rRNA gene sequence similarities they were arranged in 82 phylotypes of\ensuremath>99.0\% sequence identity. Assuming that chemical factors rule the bacteriamacroalga and bacteriabacteria interactions on algal surfaces, we tested the antibiotic activity of the bacterial isolates not only against a panel of four standard test organisms (Bacillus subtilis, Candida glabrata, Escherichia coli and Staphylococcus lentus) but also four macroalga-associated microorganisms: Algicola bacteriolytica and Pseudoalteromonas elyakovii (macroalgal pathogens), and Bacillus algicola and Formosa algae (strains associated with algal surfaces). Organic extracts of more than 51\% of the isolates from the two macroalgae inhibited the growth of at least one of the tested microorganisms. As much as 46\% and 45\% of the isolates derived from F. vesiculosus and D. sanguinea, respectively, showed antimicrobial activity against the set of macroalga-associated bacteria, compared with 13 and 19\% against a standard set of microorganisms. High antibacterial activity against macroalgal pathogens and bacterial competitors support the assumption that complex chemical interactions shape the relationships of bacteria associated with macroalgae and suggest that these bacteria are a rich source of antimicrobial metabolites.
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2013

Journal Article

Franz Goecke

Antje Labes

Jutta Wiese

Johannes Imhoff

antimicrobial activities

bacterial cultures

chemical associations

Delesseria

epiphytic bacteria

Fucus

Kiel

macroalgabacteria associations
Visualization of Defect Inflow and Resolution Cycles: Before, During and After Transfer

Jabangwe, R., Petersen, K., & vSmite, D. \. (2013). Visualization of Defect Inflow and Resolution Cycles: Before, During and After Transfer. In 20th Asia-Pacific Software Engineering Conference.
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Petersen, Kai

Abteilung/Einrichtung

FLAIR - Flensburg Artificial Intelligence Research
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2013

Conference Paper

Ronald Jabangwe

Kai Petersen

Darja vSmite

2012

Beneficial effects of 2,4-diacetylphloroglucinol- producing pseudomonads on the marine alga Saccharina latissima

Nagel, K., Schneemann, I., Kajahn, I., Labes, A., Wiese, J., & Imhoff, J. F. (2012). Beneficial effects of 2,4-diacetylphloroglucinol- producing pseudomonads on the marine alga Saccharina latissima. Aquatic Microbial Ecology, 67, 239–249. Abgerufen von http://oceanrep.geomar.de/19108/ (Original work published 2025)

Abstract

Pseudomonas strains were shown to be regularly associated with the brown macroalga Saccharina latissima from the Baltic Sea, studied over several years, and were identified as producers of the antimicrobially active compound 2,4-diacetylphloroglucinol. These findings support the assumption of a stable association between the Pseudomonas spp. strains and S. latissima in the Baltic Sea. The metabolite profile of the Pseudomonas spp. comprised monoacetylphloroglucinol, 2,4-diacetylphloroglucinol, pyoluteorin and several rhizoxins, which exhibited broad-spectrum antibiotic activities against Gram-positive and Gram-negative bacteria as well as against fungi. Because the antibiotic activities included the inhibition of the 2 algal pathogens Pseudoalteromonas elyakovii and Algicola bacteriolytica, we propose a beneficial effect of these marine pseudomonads on their host S. latissima.
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2012

Journal Article

Kerstin Nagel

Imke Schneemann

Inga Kajahn

Antje Labes

Jutta Wiese

Johannes Imhoff

Pseudomonas protegens ? Alga?bacteria association ? 2

4-diacetylphloroglucinol ? Pyoluteorin ? Rhizoxin ? Brown macroalgae

RESISTANT STAPHYLOCOCCUS-AUREUS

FLUORESCENT PSEUDOMONAS

LAMINARIA-SACCHARINA

SECONDARY METABOLITES

IN-VITRO

BACTERIA

PF-5

JAPONICA

STRAINS

AGENT

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