Items where Author is "Helmke, Elisabeth"

Article

Abele, D.

, Vazquez, S. , Buma, A. , Hernandez, E. , Quiroga, C. , Held, C.

, Frickenhaus, S.

, Harms, L.

, Lopez, J. , Helmke, E. and Mac Cormack, W. (2017)
Pelagic and benthic communities of the Antarctic ecosystem of Potter Cove: Genomics and ecological implications ,

Marine Genomics .

doi:10.1016/j.margen.2017.05.001 , hdl:10013/epic.51144

Article

Vázquez, S. , Monien, P. , Minetti, R. P. , Jürgens, J. , Curtosi, A. , Villalba Primitz, J. , Frickenhaus, S.

, Abele, D.

, Mac Cormack, W. P. and Helmke, E. (2017)
Bacterial communities and chemical parameters in soils and coastal sediments in response to diesel spills at Carlini Station, Antarctica ,

Science of The Total Environment, 605-60 , pp. 26-37 .

doi:10.1016/j.scitotenv.2017.06.129 , hdl:10013/epic.51490

Conference -Talk

Uhlig, C.

, Helmke, E. , Damm, E.

and AWECS, B. G. (2015)
Degradation of DMSP in Antarctic winter sea ice: Who is responsible? ,

Gordon Research Seminar on Polar Marine Sciences, Barga, Italy, 14 March 2015 - 15 March 2015 .

hdl:10013/epic.45345

Conference -Poster

Helmke, E. , Beszteri, B.

, Frickenhaus, S.

, Valentin, K. U. , Wichels, A.

, Wohlrab, S.

, Thoms, S. , Kube, M. and Reinhardts, R. (2013)
GENOMICS OF GLACIECOLA SP., A PREDOMINANT BACTERIUM IN ANTARCTIC WINTER SEA-ICE ,

Annual Conference of the Association for General and Applied Microbiology (VAAM) in collaboration with the Royal Netherlands Society for Microbiology (KNVM), Bremen, March 2013 - unspecified .

hdl:10013/epic.42050

Conference -Poster

Helmke, E. , Jürgens, J. , Uhlig, C.

and Fandrich, J. (2013)
Bacterial communities of sea ice, melt pools, and surface water in the Central Arctic Ocean during summer 2011 ,

5th Int. Conference on Polar and Alpine Microbiology, Big Sky, Montana, USA, 2013 - unspecified .

hdl:10013/epic.42052

Article

Mau, S. , Blees, J. , Helmke, E. , Niemann, H. and Damm, E.

(2013)
Different methanotrophic potentials in stratified polar fjord water (Storfjorden, Spitsbergen) identified by using a combination of methane oxidation techniques ,

Biogeosciences Discussion, 10 , pp. 6461-6491 .

doi:10.5194/bgd-10-6461-2013 , hdl:10013/epic.42043

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Conference -Poster

Toebe, K. , Wilhelms, F.

, Frickenhaus, S.

, Meyer, J. , John, U.

, Jürgens, J. and Helmke, E. (2013)
Exploration of microbial biodiversity in polar glacial ice ,

Jahrestagung der Vereinigung für Allgemeine und Angewandte Mikrobiologie (VAAM) zusammen mit der Koninklijke Nederlands Vereniging voor Microbiologie (KNVM), Congress Center Bremen and Messe Bremen, 10 March 2013 - 13 March 2013 .

hdl:10013/epic.41819

Book

Boetius, A.

, Gutt, J. , Helmke, E. and Meyer, B.

(2013)
Leben im und unter dem Eis / Beck, E. (editor) ,

Weinheim, Wiley-VCH Verlag, 246 p., ISBN: 978-3-52733212-0 .

hdl:10013/epic.cd6b6d0c-a0ba-49ca-85d5-28fdacf65191

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Conference -Poster

Vázquez, S. , Jürgens, J. , Monien, P. , Minetti, R. P. , MacCormack, W. P. and Helmke, E. (2012)
Response of bacterial soil communities to a small diesel-spill at the Argentine station Carlini on King George Island (Antarctica) ,

14th Int. Symposium on Microbial Ecology,, Copenhaven, Denmark .

hdl:10013/epic.42051

Article

Zendah, I. , Shaaban, K. A. , Helmke, E. , Maier, A. , Fiebig, H. and Laatsch, H. (2012)
Barakacin: a thiazolyl-indole alkaloid isolated from a ruminal Pseudomonas sp. ,

Zeitschrift Naturf. B, 67b , pp. 417-420 .

doi:10.5560/ZNB.2011-0277 , hdl:10013/epic.42048

Inbook

Boetius, A.

, Gutt, J. , Helmke, E. and Meyer, B.

(2012)
Leben im und unter dem Eis. / Beck, E. (editor) ,

In: Die Vielfalt des Lebens: Wie hoch, wie komplex, warum?, Die Vielfalt des Lebens: Wie hoch, wie komplex, warum?, Wiley-VCH .

hdl:10013/epic.40605

Article

Shaaban, K. A. , Helmke, E. , Keller, G. , Fiebig, H. and Laatsch, H. (2011)
Glucopiericidin C: a cytotoxic pieridin glucoside antibiotic produced by a marine Streptomyces isolate. ,

Journal of Antibiotics, 64 (2), pp. 205-209 .

doi:10.1038/ja.2010.125 , hdl:10013/epic.42049

Conference -Poster

Damm, E.

, Thoms, S. and Helmke, E. (2011)
Hotspots of methane formation A response to melting sea ice in nitrate stressed Polar surface water ,

European Geosciences Union General Assembly, Vienna, Austria08 April 2011. .

hdl:10013/epic.37322

Article

Abdalla, M. A. , Helmke, E. and Laatsch, H. (2010)
Fujianmycin C, A Bioactive Angucyclinone from a Marine Derived Streptomyces sp. B6219 ,

Natural Product Communications, 12 , pp. 1917-1920 .

hdl:10013/epic.36746

Conference -Poster

Helmke, E. , Thoms, S. , Beszteri, B.

, Frickenhaus, S.

, Valentin, K. U. , Kube, M. and Reinhardt, R. (2010)
GENOMICS OF GLACIECOLA SP.ANT9081: A PREDOMINANT BACTERIUM IN ANTARCTIC WINTER SEA-ICE ,

SCAR Open Science Conference, Buenos Aires, Argentina, August .

hdl:10013/epic.35665

Article

Damm, E.

, Helmke, E. , Thoms, S. , Schauer, U. , Nöthig, E. M.

, Bakker, K. and Kiene, R. P. (2010)
Methane production in aerobic oligothrophic surface water in the central Arctic Ocean ,

Biogeosciences, 7 (3), pp. 1099-1108 .

hdl:10013/epic.34729

Article

Rahman, H. , Shabaan, M. , Shabaan, K. A. , Saleem, M. , Helmke, E. , Grün-Wollny, I. and Laatsch, H. (2009)
An Imidazopyridinone and further metabolites from Streptomcetes ,

Natural product communications, 4 , pp. 965-970 .

hdl:10013/epic.33909

Article

Hawas, U. W. , Shaaban, M. , Shabaan, K. A. , Speitling, M. , Maier, A. , Keller, G. , Fiebig, H. H. , Meiners, M. , Helmke, E. and Laatsch, H. (2009)
Mansouramycins A-D, Cytotoxic Isoquinolinequinones from a marine streptomycete ,

Journal of Natural Products, 72 (12), pp. 2120-2124 .

doi:10.1021/np900160g , hdl:10013/epic.33911

Article

Schuhmann, I. , Yao, C. B. F. F. , Al-Zereini, W. , Anke, H. , Helmke, E. and Laatsch, H. (2009)
Nitro derivatives from the Arctic ice bacterium Salegentibacter sp. isolate T436 ,

Journal of Antibiotics, 62 , pp. 453-460 .

doi:10.1038/ja.2009.71 , hdl:10013/epic.33910

Conference -Invited talk

Helmke, E. (2009)
Nutzung von Mikroorganismen und Enzymen aus polaren Gewässern in der Lebensmitteltechnologie. ,

Symposium Fortschritte in der Lebensmitteltechnologie. .

hdl:10013/epic.33655

Other

Gerdes, B. , Reuter, K. , Jürgens, J. and Helmke, E. (2008)
Bioremediationsverfahren zum beschleunigten biologischen Abbau von Petroleum-Kohlenwasserstoffen in den polaren meereisbedckten Regionen und Bakterien- und Enzymgemische als Mittel zur Verfahrensdurchführung DE 10 2007 003 644 A1 2008.07.24 ,

[Other]

hdl:10013/epic.39570

Inbook

Helmke, E. and Gerdes, B. (2008)
Effect of oil contamination and bioremediation on bacterial communities in polar sea-ice environments ,

Microbes and the Environments: Perspectives and Challenges., ISBN: 978-7-03-021405-8 .

hdl:10013/epic.31133

Article

Shaaban, K. A. , Shaaban, M. , Facey, P. , Fotso, S. , Frauendorf, H. , Helmke, E. , Maier, A. , Fiebig, H. H. and Laatsch, H. (2008)
Electrospray ionization mass spectra of piperazimycins A and B and gamma-butyrolactones from a marine-derived Streptomyces sp. ,

Journal of Antibiotics, 61 , pp. 736-746 .

hdl:10013/epic.33908

Conference -Invited talk

Helmke, E. , Töbe, K. , Wilhelms, F.

and Miller, H. (2008)
Exploration of microbial diversity in polar glacial ice and sub-glacial water ,

SCAR Open Science Conference, St Petersburg, Russia. .

hdl:10013/epic.31108

Article

Sohn, R. A. , Willis, C. , Humphris, S. , Shank, T. M. , Singh, H. , Edmonds, H. N. , Kunz, C. , Hedman, U. , Helmke, E. , Jakuba, M. , Liljebladh, B. , Linder, J. , Murphy, C. , Nakamura, K. I. , Sato, T. , Schlindwein, V.

, Stranne, C. , Tausenfreund, M. , Upchurch, L. , Winsor, P. , Jakobsson, M. and Soule, A. (2008)
Explosive volcanism on the ultraslow-spreading Gakkel ridge, Arctic Ocean ,

Nature, 453 (7199), pp. 1236-1238 .

doi:10.1038/nature07075 , hdl:10013/epic.31132

Conference -Invited talk

Helmke, E. and Gerdes, B. (2007)
Effect of oil contamination and bioremediation on bacterial communities in polar sea-ice environments ,

China-Germany Symposium on Microbes and the Environment, September 2007, Beijing, China. .

hdl:10013/epic.30066

Article

Shaaban, M. , Schröder, D. , Shaaban, K. A. , Helmke, E. , Grün-Wollny, I. , Wagner-Döbler, I. and Laatsch, H. (2007)
Flazin, Perlolyrin, and other ß-Carbolines from marine derived Bacteria ,

Revista Latinoamericana de Química, 35 , pp. 58-67 .

hdl:10013/epic.31131

Conference -Talk

Sauter, E.

, Baum, C. , Biebow, N. , Boebel, O.

, Buck, B. H.

, Gerdes, B. , Helmke, E. , Klages, M. , Köhler, A. and Schröder, A. (2007)
Meerestechnologien für den Umweltschutz - Entwicklungen am Alfred-Wegener-Institut ,

Vortrag anlässlich des Besuches von Bundesumweltminister Sigmar Gabriel (MdB) am 21. März 2007. .

hdl:10013/epic.26442

Conference -Talk

Helmke, E. , Jürgens, J. , Tausendfreund, M. , Wollenburg, J.

, Shank, T. , Edmundson, H. , Humphris, S. , Nakamura, K. , Liliebladh, B. , Windsor, P. , Singh, H. and Reves- Sohn, R. (2007)
Microbial Communities at Non-Volcanic and Volcanic Sites of the Gakkel Ridge ,

AGU (American Geophysical Union) Fall Meeting, San Francisco, USA, December 2007. .

hdl:10013/epic.31157

Article

Al-Zereini, W. , Schuhmann, I. , Laatsch, H. , Helmke, E. and Anke, H. (2007)
New aromatic nitro compounds from Salegentibacter sp T436, an Arctic Sea ice bacterium: Taxonomy, fermentation, isolation, and biological activities ,

Journal of Antibiotics, 60 , pp. 301-308 .

hdl:10013/epic.28795

Conference -Talk

Reves-Sohn, R. , Edmonds, H. , Humphris, S. , Shank, T. , Singh, H. , Helmke, E. , Jakuba, M. , Kunz, C. , Liljebladh, B. , Linder, J. , Murphy, C. , Nakamura, K. , Sato, T. , Schlindwein, V.

, Tausendfreund, M. , Upchurch, L. , Willis, C. and Winsor, P. (2007)
Scientific Scope and Summary of the Arctic Gakkel Vents (AGAVE) Expedition ,

AGU Fall Meeting, San Francicso, December .

hdl:10013/epic.28738

Conference -Poster

Baum, C. , Canfield, P. , Dubitscher, C. , Helmke, E. , Passow, U. , Reuter, K. , von Bistram, M. , Wendorff, J. , Flies, K. , Keim, E. , Schmidt, A. , Kerner, M. , Kroon, S. and Kroon, B. (2006)
BioBod: Biofiltration mit Nanofasern ,

Bionik-Kongress Bremen. .

hdl:10013/epic.26311

Conference -Poster

Helmke, E. , Jürgens, J. , Reuter, K. and Gerdes, B. (2006)
Comparison between bacterial communities of different deep-sea basins in the east Atlantic Ocean ,

11th International Symposium on Microbial Ecology, Wien, Austria, 2006, A205. .

hdl:10013/epic.28796

Article

Poumale, H. M. P. , Ngadjui, B. T. , Helmke, E. and Laatsch, H. (2006)
New anthraquinones from a marine Streptomyces sp. isolation, structure determination and biological activities ,

Zeitschrift für Naturforschung section B-A Journal of chemical Sciences, 61 , pp. 1450-1454 .

hdl:10013/epic.28794

Article

Yao, C. B. F. , Schiebel, M. , Helmke, E. , Anke, H. and Laatssch, H. (2006)
Prefluostatin and new urauchimycin derivatives produced by Streptomycete isolates ,

Zeitschrift für Naturforschung Section B-A Journal of Chemical Sciences, 61 , pp. 320-325 .

hdl:10013/epic.28793

Article

Kock, I. , Maskey, R. P. , Biabani, M. A. , Helmke, E. and Laatsch, H. (2005)
1-Hydroxy-1-norresistomycin and resistoflavin methylether: new antibiotics from marine-derived streptomycetes ,

Journal of antibiotics, 58 (8), pp. 530-534 .

hdl:10013/epic.24226

Article

Helmke, E. (2005)
The Expeditions ANTARKTIS XXI/3-4-5 of the research vessel "POLARSTERN" in 2004 ,

Berichte zur Polar- und Meeresforschung, 500, 269 , pp. 277-278 .

hdl:10013/epic.24500

Article

Gerdes, B. , Brinkmeyer, R. , Dieckmann, G. and Helmke, E. (2005)
Influence of crude oil on changes of bacterial communities in Arctic sea-ice ,

Fems microbiology ecology, 53 , pp. 129-139 .

hdl:10013/epic.22198

Conference -Invited talk

Helmke, E. , Jürgens, J. , Klauke, U. and Brinkmeyer, R. (2005)
Potential of sea ice and benthic bacterial communities to adapt to changing environmental conditions. ,

Invited lecture, ASLO Summer Meeting 2005, 19-24 June, Santiago de Compostella, Spain. .

hdl:10013/epic.24501

Conference -Invited talk

Helmke, E. and Gerdes, B. (2005)
Response of marine microbial communities to environmental changes and to human impact in polar and temperate marine habitats ,

Workshop "Human activity and marine enivironment", Ningbo, ChinaOct. 2005. .

hdl:10013/epic.24505

Conference -Poster

Helmke, E. , Jürgens, J. , Klauke, U. , Gerdes, B. and Brinkmeyer, R. (2005)
Response of sea ice and benthic bacterial communities to changing environmental conditions ,

HGF-International Workshop on Diversity. München, GermanyOct. 2005. .

hdl:10013/epic.31147

Conference -Invited talk

Helmke, E. (2005)
Tolerance limits of microbes in ice environments ,

DFG Colloquium: Mars and the Terrestrial Plantes, BerlinAug. 2005. .

hdl:10013/epic.24504

Article

Dickschat, J. S. , Helmke, E. and Schulz, S. (2005)
Volatile Organic compounds from arctic bacteria of the Cytophaga-Flavobacterium-Bacteroides group. A retrobiosynthetic approach in chemotaxonomic investigations ,

Chemistry & Biodiversity, 2 , pp. 318-353 .

hdl:10013/epic.22199

"Berichte zur Polar- und Meeresforschung" Expedition reports

Smetacek, V. , Bathmann, U. and Helmke, E. (2005)
The expeditions ANTARKTIS XXI/3-4-5 of the research vessel "Polarstern" in 2004 = Die Expeditionen ANTARKTIS XXI/3-4-5 des Forschungsschiffes "Polarstern" 2004 / ,

Berichte zur Polar- und Meeresforschung (Reports on Polar and Marine Research), Bremerhaven, Alfred Wegener Institute for Polar and Marine Research, 500 , 302 p. .

doi:10.2312/BzPM_0500_2005 , hdl:10013/epic.10505

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Article

Maskey, R. P. , Helmke, E. , Kayser, O. , Fiebig, H. H. , Maier, A. , Busche, A. and Laatsch, H. (2004)
Anti-cancer and anti-bacterial trioxacarcins with high anti-malaria activity from a marine Streptomycete and their absolute stereochemistry ,

Journal of antibiotics, 57 , pp. 771-779 .

hdl:10013/epic.28791

Conference -Poster

Helmke, E. , Jürgens, J. and Klauke, U. (2004)
Cold and depth adaptation of benthic bacterial communities in the sea ice covered Arctic Ocean ,

0th International Symposium on Microbial Ecology, Cancun, Mexico.Aug. 2004. .

hdl:10013/epic.24507

Conference -Poster

Helmke, E. , Jürgens, J. and Klauke, U. (2004)
Comparison between benthic bacterial communities of the Southern and Arctic Ocean ,

XXVIII SCAR Open Science Conference, Bremen, Germany, 25-31 June, 2004,. .

hdl:10013/epic.31146

Article

Maskey, R. P. , Sevvana, M. , Uson, I. , Helmke, E. and Laatsch, H. (2004)
Gutingimycin: A Highly Complex Metabolite from a Marine Streptomycete ,

Angewandte chemie-international edition, 43 , pp. 1281-1283 .

doi:10.1002/anie.200352312 , hdl:10013/epic.20687

Article

Maskey, R. P. , Sevvana, M. , Uson, I. , Helmke, E. and Laatsch, H. (2004)
Gutingimycin: ein komplexer Metabolit aus einem marinen Streptomyceten ,

Angewandte Chemie, 116 , pp. 1301-1303 .

doi:10.1002/ange.200352312 , hdl:10013/epic.20688

Article

Sobolevskaya, M. P. , Fotso, S. , Havash, U. , Denisenko, V. A. , Helmke, E. , Prokofeva, N. G. , Kuznetsova, T. A. , Laatsch, H. and Elyakov, G. B. (2004)
Metabolites of the sea isolate of bacteria Streptomyces SP 6167 ,

Chemistry of natural compounds, 40 , pp. 282-285 .

hdl:10013/epic.24499

Article

Sobolevskaya, M. P. , Fotso, S. , Havash, U. , Denisenko, V. A. , Helmke, E. , Prokofeva, N. G. , Kuznetsova, T. A. , Laatsch, H. and Elyakov, G. B. (2004)
Metabolites of the sea isolate of bacteria Streptomyces SP 6167. ,

Chemistry of natural compounds, 40 (3), pp. 282-285 .

doi:10.1023/B:CONC.0000039143.59854.6e , hdl:10013/epic.24508

Article

Stritzke, K. , Schulz, S. , Laatsch, H. , Helmke, E. and Beil, W. (2004)
Novel Caprolactones from a Marine Streptomycete ,

Journal of natural products, 67 , pp. 395-401 .

doi:10.1021/np030321z , hdl:10013/epic.20637

Article

Brinkmeyer, R. , Glöckner, F. O.

, Helmke, E. and Amann, R. (2004)
Predominance of beta-proteobacteria in summer melt pools on Arctic pack ice ,

Limnology and oceanography, 49 (4), pp. 1013-1021 .

hdl:10013/epic.21101

Article

Helmke, E. and Weyland, H. (2004)
Psychrophilic versus Psychrotolerant bacteria- Occurrence and significance in polar and temperate marine habitats ,

Cellular and molecular biology, 50 (5), pp. 553-561 .

doi:10.1170/T545 , hdl:10013/epic.21828

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Conference -Poster

Gerdes, B. , Brinkmeyer, R. , Dieckmann, G. and Helmke, E. (2004)
Response of Arctic bacterial sea ice communities to contamination of crude oil ,

International Conference on Arctic Microbiology, 22-25 March 2004, Rovaniemi, Finland .

hdl:10013/epic.24361

Weekly Reports

Helmke, E. (2004)
Weekly report for R.V. Polarstern expedition ANT-XXI/5, report no. 1 (08.05.2004), german version ,

Alfred-Wegener-Institute for Polar- and Marine Research, Bremerhaven, Bremerhaven, Alfred Wegener Institute for Polar and Marine Research .

hdl:10013/epic.27183

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Weekly Reports

Helmke, E. (2004)
Weekly report for R.V. Polarstern expedition ANT-XXI/5, report no. 2 (16.05.2004), german version ,

Alfred-Wegener-Institute for Polar- and Marine Research, Bremerhaven, Bremerhaven, Alfred Wegener Institute for Polar and Marine Research .

hdl:10013/epic.27184

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Weekly Reports

Helmke, E. (2004)
Weekly report for R.V. Polarstern expedition ANT-XXI/5, report no. 3 (24.05.2004), german version ,

Alfred-Wegener-Institute for Polar- and Marine Research, Bremerhaven, Bremerhaven, Alfred Wegener Institute for Polar and Marine Research .

hdl:10013/epic.27185

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Weekly Reports

Helmke, E. (2004)
Weekly reports for R.V. Polarstern expedition ANT-XXI/5 (2004-05-08 - 2004-06-02, Cape Town - Bremerhaven), German version ,

Alfred-Wegener-Institute for Polar- and Marine Research, Bremerhaven, Bremerhaven, Alfred Wegener Institute for Polar and Marine Research .

hdl:10013/epic.44525

[thumbnail of ANT-XXI_5_weekly_reports.pdf]

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Conference -Invited talk

Helmke, E. (2003)
Biodiversität mikrobieller Gemeinschaften in polaren Meeren ,

Kolloquium, Institut für Biotechnologische Wirkstoff-Forschung, Universität Kaiserslautern. .

hdl:10013/epic.17843

Article

Brinkmeyer, R. , Knittel, K. , Jürgens, J. , Weyland, H. , Amann, R. and Helmke, E. (2003)
Diversity and structure of bacterial communities in Arctic versus Antarctic sea ice: A comparison ,

Applied and environmental microbiology, 69 , pp. 6610-6619 .

hdl:10013/epic.16788

Conference -Invited talk

Helmke, E. , Weyland, H. and Laatsch, H. (2003)
From mangrove to polar sea ice - occurrence and bioactive potential of marine actinomcetes. ,

International Symposium on Biology of Actinomycetes, ISBA13, Melbourne AustraliaDec. 2003. .

hdl:10013/epic.24506

Article

Maskey, R. P. , Helmke, E. and Laatsch, H. (2003)
Himalomycin A and B: Isolation and structure elucidation of new fridamycin type antibiotics from a marine Streptomyces isolate ,

Journal of antibiotics, 56 , pp. 942-949 .

hdl:10013/epic.24296

Conference -Poster

Gerdes, B. , Brinkmeyer, R. , Dieckmann, G. and Helmke, E. (2003)
Influence of oil on the development of bacterial communities in Arctic sea ice and melt pools ,

Workshop on Cold Adaptations of Aquatic Microorganisms, 11-14 May 2003, Bremen, Germany. .

hdl:10013/epic.24366

Article

Maskey, R. P. , Kock, I. , Helmke, E. and Laatsch, H. (2003)
Isolation and Structure Determination of Phenazostatin D, a New Phenazine from a Marine Actinomycete Isolate Pseudonocardia sp. B6273 ,

Zeitschrift fur naturforschung section b-a journal of chemical sciencesb, 58 , pp. 692-694 .

hdl:10013/epic.19638

Article

Borriss, M. , Helmke, E. , Hanschke, R. and Schweder, T. (2003)
Isolation and characterization of marine psychrophilic phage-host-systems from Arctic sea ice ,

Extremophiles, 7 , pp. 377-384 .

doi:10.1007/s00792-003-0334-7 , hdl:10013/epic.19168

Article

Helmke, E. (2003)
Ist Leben auf dem Jupiter Mond Europa möglich? ,

Raumfahrt Concret, 3 , pp. 21-24 .

hdl:10013/epic.19762

Preview

Article

Brinkmeyer, R. , Glöckner, F. O.

, Helmke, E. and Amann, R. (2003)
Predominance of beta-proteobacteria in summer melt pools on Arctic pack ice ,

Limnology and Oceanography. .

hdl:10013/epic.19320

Article

Maskey, R. P. , Pusecker, K. , Speitling, M. , Monecke, P. , Helmke, E. and Laatsch, H. (2002)
2- and 4-Chartreusin-monoacetates, new Natural Products with Unusual Anisotropy Effects from the marine Isolates Streptomyces sp. B5525 and B5342 ,

Zeitschrift fur naturforschung section b-a journal of chemical sciencesb, 57 , pp. 823-829 .

hdl:10013/epic.16060

Article

Asolkar, R. N. , Maskey, R. P. , Helmke, E. and Laatsch, H. (2002)
Chalcomycin B, a new macrolide antibiotic from the marine isolate Streptomyces sp B7064 ,

Journal of antibiotics, 55 , pp. 893-898 .

hdl:10013/epic.20386

Article

Helmke, E. and Quéric, N. (2002)
Deep-sea microbiology ,

Berichte zur Polar- und Meeresforschung, 422 , pp. 24-26 .

hdl:10013/epic.18242

Article

Maskey, R. P. , Kock, I. , Shaaban, M. , Grün-Wollny, I. , Helmke, E. , Mayer, F. , Wagner-Döbler, I. and Laatsch, H. (2002)
Low molecular weight oligo-ß-hydroxybutyric acids and 3-hydroxy-N-phenethyl-butyramide- new products from microorganisms ,

Polymer Bulletin, 49 , pp. 87-93 .

hdl:10013/epic.16577

Article

Maskey, R. P. , Helmke, E. , Fiebig, H. H. and Laatsch, H. (2002)
Parimycin: Isolation and stucture elucidation of a novel cytotoxic 2,3-dihydroquinizarin analogue of gamma-indomycinone from a marine streptomycete isolate ,

Journal of antibiotics, 55 , pp. 1031-1035 .

hdl:10013/epic.20384

Article

Riemann, F. and Helmke, E. (2002)
Symbiotic Relations of Sediment-Agglutinating Nematodes and Bacteria in Detrital Habitats: The Enzyme-Sharing Concept ,

Marine ecology-pubblicazioni della stazione zoologica di napoli i:, 23 (2), pp. 93-113 .

doi:10.1046/j.1439-0485.2002.02765.x , hdl:10013/epic.16021

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Conference -Invited talk

Helmke, E. (2001)
Biodiversity microbial communities in polar seas ,

Ladenburger Diskurs zum Thema : Marine Biodiversity. .

hdl:10013/epic.17940

Article

Le, V. T. , Ho, T. , Helmke, E. , Le, T. B. and Schweder, T. (2001)
Cloning of two pectate lyase genes from the marine Antarctic bacterium Pseudoalteromonas haloplanktis strain ANT/505 and characterization of the enzymes ,

Extremophiles, 5 (1), pp. 35-44 .

doi:10.1007/s007920000170 , hdl:10013/epic.14884

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Article

Bendt, A. , Hüller, H. , Kammel, U. , Helmke, E. and Schweder, T. (2001)
Cloning, expression, and characterization of a chitinase gene from the Antarctic psychrotolerant bacterium Vibrio sp. strain Fi:7 ,

Extremophiles, 5 (2), pp. 119-126 .

doi:10.1007/s007920100179 , hdl:10013/epic.14885

Article

Mukku, J. R. V. , Speitling, M. , Laatsch, H. and Helmke, E. (2000)
New Butenolides from Two Marine Streptomycetes ,

Journal of Natural Products, 63 , pp. 1570-1572 .

hdl:10013/epic.14798

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Article

Mukku, J. R. V. , Speitling, M. , Laatsch, H. and Helmke, E. (2000)
New Butenolides from Two Marine Streptomycetes ,

Journal of Natural Products, 63 , pp. 1570-1572 .

hdl:10013/epic.14800

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Conference -Poster

Helmke, E. , Jürgens, J. , Drebing, W. and Weber, K. (2000)
Occurrence and function of a hydrophobic polyene in cold and pressure adapted bacteria ,

Extremophiles, Hamburg.Sept. 2000. .

hdl:10013/epic.31870

Conference -Invited talk

Helmke, E. (1999)
From ecology to biotechnology of sea ice bacteria ,

Marine biotechnology and biosensoric symposium, Greifswald .

hdl:10013/epic.17840

Conference -Invited talk

Helmke, E. (1999)
Ökologische und physiologische Charakteristika der arktischen und antarktischen Meereisflora ,

Institut für Polarökologie, Universität Kiel. .

hdl:10013/epic.17845

Article

Biabani, M. A. F. , Bakke, M. , Lovisetto, B. , Laatsch, H. , Helmke, E. and Weyland, H. (1998)
Anthranilamides: New antimicroalgal active substances from a marine Streptomyces sp ,

Journal of antibiotics, 51 (3), pp. 333-340 .

hdl:10013/epic.10885

Article

Pusecker, K. , Laatsch, H. , Helmke, E. and Weyland, H. (1997)
Dihydrophencomycin methyl ester, a new phenazine derivative from a marine Streptomycete ,

Journal of antibiotics, 50 (6), pp. 479-483 .

hdl:10013/epic.13056

Conference -Invited talk

Helmke, E. (1997)
Leben unter hohem hydrostatischen Druck ,

Kolloquium des Inst. f. organische Chemie der Universität Göttingen. .

hdl:10013/epic.17849

Conference -Invited talk

Helmke, E. (1997)
Sind psychrophile and barophile Bakterien Kuriosa oder erfüllen sie an extremen Standorten wesentliche Funktionen ,

Kolloquium des Inst. f. Mikrobiologie und Molekularbiologie der Universität Greifswald. .

hdl:10013/epic.17848

Conference -Invited talk

Helmke, E. (1997)
Welche Rolle spielen psychrophile und barophile Bakterien in den pelagischen und benthischen Tiefseegemienschaften des Südpolarmeeres? ,

Kolloquium des Instituts für Meereskunde Kiel. .

hdl:10013/epic.17846

Article

Helmke, E. and Weyland, H. (1995)
Bacteria in sea ice and underlying water of the eastern Weddell Sea in midwinter ,

Marine Ecology Progress Series, 117 , pp. 269-287 .

hdl:10013/epic.11859

Article

Balk-Bindseil, W. , Helmke, E. , Weyland, H. and Laatsch, H. (1995)
Maremycin A and B, new diketopiperazines from a marine Streptomyces sp. ,

Liebigs Annalen, 1995 , pp. 1291-1294 .

hdl:10013/epic.10751

Conference -Invited talk

Helmke, E. (1995)
Mikrobielle Besiedlung und Abbau partikulärer Substanz in kalten Habitaten ,

Kolloquium des Inst. f. Technische Biochemie der Universität Stuttgart. .

hdl:10013/epic.17868

Conference -Invited talk

Helmke, E. (1995)
Mikrobielle Besiedlung und Abbau partikulärer Substanz in kalten Habitaten ,

Kolloquium des Inst. f. Technische Biochemie der Universität Stuttgart. .

hdl:10013/epic.17869

Article

Rüger, H. J. , Helmke, E. , Grossmann, S. , Schaumann, K. and Tan, T. L. (1995)
Mikrobiologie am Alfred-Wegener-Institut für Polar- und Meeresforschung in Bremerhaven ,

Mitteilungen Deutsche Gesellschaft für Meeresforschung, 95 (2), pp. 5-10 .

hdl:10013/epic.13290

Conference -Invited talk

Helmke, E. and Weyland, H. (1993)
Some aspects of deep-sea microbiology with emphasis on the environment of the Southern Ocean ,

Proceedings International Marine Biotechnology Conference (W. Fenical, M. Greenberg, H. O. Halvorson, F. C. Hunter-Cevera, eds. ) Brown Publishers, Dubuque, IA,pp. .

hdl:10013/epic.11858

Article

Helmke, E. and Weyland, H. (1991)
Effect of temperature on extracellular enzymes occurring in permanently cold marine environments ,

Kieler Meeresforschung ,Sonderheft. 8, pp. 198-204 .

hdl:10013/epic.11857

Article

Weyland, H. and Helmke, E. (1989)
Barophilic and psychrophilic bacteria in the Antarctic Ocean ,

Recent advances in microbial ecology Proceedings of the 5th International Symposium on Microbial Ecology (T Hattori et al eds ) Japan Scient. Soc. Press, Tokyo,pp., pp. 43-47 .

hdl:10013/epic.13950