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E. Helmke · SciRah

Researcher profile · Semantic Scholar

E. Helmke

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E. Helmke — researcher profile on SciRah

h-index: 31
Works: 111
Citations: 3,328

Most-cited papers

Diversity and Structure of Bacterial Communities in Arctic versus Antarctic Pack Ice
R. Brinkmeyer, K. Knittel, J. Jürgens, H. Weyland +2 more
2003Applied and Environmental Microbiology430 citations Open access
Semantic Scholar
Methane production in aerobic oligotrophic surface water in the central Arctic Ocean
E. Damm, E. Helmke, S. Thoms, U. Schauer +3 more
2009236 citations Open access
Semantic Scholar
Influence of crude oil on changes of bacterial communities in Arctic sea-ice.
B. Gerdes, R. Brinkmeyer, G. Dieckmann, E. Helmke
2005FEMS Microbiology Ecology170 citations
Semantic Scholar
Explosive volcanism on the ultraslow-spreading Gakkel ridge, Arctic Ocean
R. Sohn, C. Willis, S. Humphris, T. Shank +18 more
2008Nature145 citations Open access
Semantic Scholar
Anti-cancer and antibacterial trioxacarcins with high anti-malaria activity from a marine Streptomycete and their absolute stereochemistry.
R. P. Maskey, E. Helmke, O. Kayser, H. Fiebig +3 more
2004Journal of antibiotics (Tokyo. 1968)141 citations Open access
Semantic Scholar
Vertical distribution of methane oxidation and methanotrophic response to elevated methane concentrations in stratified waters of the Arctic fjord Storfjorden (Svalbard, Norway)
S. Mau, J. Blees, E. Helmke, H. Niemann +1 more
2013111 citations Open access
Semantic Scholar
Himalomycin A and B: isolation and structure elucidation of new fridamycin type antibiotics from a marine Streptomyces isolate.
R. P. Maskey, E. Helmke, H. Laatsch
2003Journal of antibiotics (Tokyo. 1968)104 citations Open access
Semantic Scholar
Isolation and characterization of marine psychrophilic phage-host systems from Arctic sea ice
Michael Borriss, E. Helmke, R. Hanschke, T. Schweder
2003Extremophiles99 citations
Semantic Scholar
Mansouramycins A-D, cytotoxic isoquinolinequinones from a marine streptomycete.
Usama W. Hawas, Mohamed A. Shaaban, Khaled A. Shaaban, M. Speitling +6 more
2009Journal of Natural Products97 citations
Semantic Scholar
Psychrophilic versus psychrotolerant bacteria--occurrence and significance in polar and temperate marine habitats.
E. Helmke, H. Weyland
2004Cellular and Molecular Biology89 citations
Semantic Scholar
Symbiotic Relations of Sediment‐Agglutinating Nematodes and Bacteria in Detrital Habitats: The Enzyme‐Sharing Concept
F. Riemann, E. Helmke
200286 citations Open access
Semantic Scholar
Cloning of two pectate lyase genes from the marine Antarctic bacterium Pseudoalteromonas haloplanktis strain ANT/505 and characterization of the enzymes
Le Van Truong, H. Tuyen, E. Helmke, L. Bình +1 more
2001Extremophiles79 citations
Semantic Scholar
Novel caprolactones from a marine streptomycete.
K. Stritzke, Stefan E. Schulz, H. Laatsch, E. Helmke +1 more
2004Journal of Natural Products78 citations
Semantic Scholar
Chalcomycin B, a new macrolide antibiotic from the marine isolate Streptomyces sp. B7064.
R. Asolkar, R. P. Maskey, E. Helmke, H. Laatsch
2002Journal of antibiotics (Tokyo. 1968)75 citations Open access
Semantic Scholar
New butenolides from two marine streptomycetes.
Venugopal Mukku, M. Speitling, H. Laatsch, E. Helmke
2000Journal of Natural Products74 citations Open access
Semantic Scholar
1-Hydroxy-1-norresistomycin and Resistoflavin Methyl Ether: New Antibiotics from Marine-derived Streptomycetes†, ††
Ines Kock, R. P. Maskey, M. A. Farooq Biabani, E. Helmke +1 more
2005Journal of antibiotics (Tokyo. 1968)73 citations
Semantic Scholar
Gutingimycin: a highly complex metabolite from a marine streptomycete.
R. P. Maskey, M. Sevvana, I. Usón, E. Helmke +1 more
2004Angewandte Chemie61 citations
Semantic Scholar
Dihydrophencomycin methyl ester, a new phenazine derivative from a marine Streptomycete.
K. Pusecker, H. Laatsch, E. Helmke, H. Weyland
1997Journal of antibiotics (Tokyo. 1968)60 citations Open access
Semantic Scholar
New Aromatic Nitro Compounds from Salegentibacter sp. T436, an Arctic Sea Ice Bacterium: Taxonomy, Fermentation, Isolation and Biological Activities
W. Al-Zereini, Imelda Schuhmann, H. Laatsch, E. Helmke +1 more
2007Journal of antibiotics (Tokyo. 1968)56 citations
Semantic Scholar
Volatile Organic Compounds from Arctic Bacteria of the Cytophaga‐Flavobacterium‐Bacteroides Group: A Retrobiosynthetic Approach in Chemotaxonomic Investigations
Jeroen S. Dickschat, E. Helmke, S. Schulz
2005Chemistry and Biodiversity51 citations
Semantic Scholar
Cloning, expression, and characterization of a chitinase gene from the Antarctic psychrotolerant bacterium Vibrio sp. strain Fi:7
A. Bendt, Heike Hüller, Ulrike Kammel, E. Helmke +1 more
2001Extremophiles48 citations
Semantic Scholar
Predominance of β‐proteobacteria in summer melt pools on Arctic pack ice
R. Brinkmeyer, F. Glöckner, E. Helmke, R. Amann
200446 citations Open access
Semantic Scholar
Parimycin: isolation and structure elucidation of a novel cytotoxic 2,3-dihydroquinizarin analogue of gamma-indomycinone from a marine streptomycete isolate.
R. P. Maskey, E. Helmke, H. Fiebig, H. Laatsch
2002Journal of antibiotics (Tokyo. 1968)46 citations Open access
Semantic Scholar
Isolation and Structure Determination of Phenazostatin D, a New Phenazine froma Marine Actinomycete Isolate Pseudonocardia sp. B6273
R. P. Maskey, Ines Kock, E. Helmke, H. Laatsch
200340 citations
Semantic Scholar
Bacterial communities and chemical parameters in soils and coastal sediments in response to diesel spills at Carlini Station, Antarctica.
S. Vázquez, P. Monien, R. P. Pepino Minetti, J. Jürgens +6 more
2017Science of the Total Environment37 citations
Semantic Scholar
Seasonal methane accumulation and release from a gas emission site in the central North Sea
S. Mau, T. Gentz, J. Körber, M. Torres +6 more
201436 citations Open access
Semantic Scholar
Glucopiericidin C: a cytotoxic piericidin glucoside antibiotic produced by a marine Streptomyces isolate*
Khaled A. Shaaban, E. Helmke, G. Kelter, H. Fiebig +1 more
2011Journal of antibiotics (Tokyo. 1968)33 citations Open access
Semantic Scholar
Pelagic and benthic communities of the Antarctic ecosystem of Potter Cove: Genomics and ecological implications.
D. Abele, S. Vázquez, A. Buma, E. Hernández +7 more
2017Marine Genomics32 citations Open access
Semantic Scholar
New Anthraquinones from a Marine Streptomyces sp. – Isolation, Structure Determination and Biological Activities
H. M. P. Poumale, B. Ngadjui, E. Helmke, H. Laatscha
200622 citations Open access
Semantic Scholar
Nitro derivatives from the Arctic ice bacterium Salegentibacter sp. isolate T436*
Imelda Schuhmann, C. B. F. Yao, W. Al-Zereini, H. Anke +2 more
2009Journal of antibiotics (Tokyo. 1968)21 citations Open access
Semantic Scholar
Marine Bacteria, XLVII – Psychrotolerant Bacteria from Extreme Antarctic Habitats as Producers of Rare Bis- and Trisindole Alkaloids
V. Nair, Imelda Schuhmann, H. Anke, G. Kelter +3 more
2016Planta Medica19 citations
Semantic Scholar
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 /
V. Smetacek, U. Bathmann, E. Helmke
200517 citations
Semantic Scholar
Oligomycins and pamamycin homologs impair motility and induce lysis of zoospores of the grapevine downy mildew pathogen, Plasmopara viticola.
Zerihun T. Dame, M. Islam, E. Helmke, A. von Tiedemann +1 more
2016FEMS Microbiology Letters14 citations Open access
Semantic Scholar
Flazin, Perlolyrin, and other ß-Carbolines from marine derived Bacteria
Mohamed A. Shaaban, Dirk Schröder, Khaled A. Shaaban, E. Helmke +3 more
200713 citations
Semantic Scholar
Fujianmycin C, A Bioactive Angucyclinone from a Marine Derived Streptomyces sp. B6219 [1]
M. Abdalla, E. Helmke, H. Laatsch
2010Natural Product Communications11 citations Open access
Semantic Scholar
Barakacin: A Thiazolyl-indole Alkaloid Isolated from a Ruminal Pseudomonas sp.
Imene Zendah, Khaled A. Shaaban, E. Helmke, A. Maier +2 more
201210 citations Open access
Semantic Scholar
An Imidazopyridinone and Further Metabolites from Streptomycetes [1]
Hafizur Rahman, Mohamed A. Shaaban, Khaled A. Shaaban, M. Saleem +3 more
2009Natural Product Communications10 citations Open access
Semantic Scholar
Electrospray Ionization Mass Spectra of Piperazimycins A and B and γ-Butyrolactones from a Marine-derived Streptomyces sp.†
Khaled A. Shaaban, Mohamed A. Shaaban, P. Facey, S. Fotso +5 more
2008Journal of antibiotics (Tokyo. 1968)10 citations Open access
Semantic Scholar
Biological and Geological Characteristics of the Gakkel Ridge
T. Shank, J. Bailey, H. Edmonds, P. Forte +7 more
200710 citations
Semantic Scholar
Scientific Scope and Summary of the Arctic Gakkel Vents (AGAVE) Expedition
R. Reves-Sohn, H. Edmonds, S. Humphris, T. Shank +14 more
20079 citations
Semantic Scholar
Diversity and structure of bacterial communities in Arctic versus Antarctic sea ice: A comparison
R. Brinkmeyer, K. Knittel, J. Jürgens, H. Weyland +2 more
20038 citations
Semantic Scholar
Structure elucidation and synthesis of hydroxylated isatins from Streptomycetes
Khaled A. Shaaban, Mohamed A. Shaaban, V. Nair, Imelda Schuhmann +6 more
20165 citations
Semantic Scholar
Different methanotrophic potentials in stratified polar fjord waters (Storfjorden, Spitsbergen) identified by using a combination of methane oxidation techniques
S. Mau, J. Blees, E. Helmke, H. Niemann +1 more
20135 citations Open access
Semantic Scholar
Low molecular weight oligo-β-hydroxybutyric acids and 3-hydroxy-N-phenethyl-butyramide – new products from microorganisms
R. P. Maskey, Ines Kock, Mohamed A. Shaaban, I. Grün-Wollny +4 more
20025 citations
Semantic Scholar
Marine Bacteria. Part 28. Anticancer and Antibacterial Trioxacarcins with High Antimalaria Activity from a Marine Streptomycete and Their Absolute Stereochemistry
R. P. Maskey, E. Helmke, O. Kayser, H. Fiebig +3 more
20054 citations Open access
Semantic Scholar
Macrolide Antibiotic from the Marine Isolate Streptomyces sp
R. Asolkar, R. P. Maskey, E. Helmke, H. Laatsch
20034 citations
Semantic Scholar
2-Hydroxy-luisol A, a New Quinone-derived Tetraol from a Marine Streptomyces sp. and Oxidation Products of Luisol A*
S. Fotso, Clarisse B. Fotso-Fondja Yao, E. Helmke, H. Laatsch
20113 citations Open access
Semantic Scholar
Marine Bacteria. Part 20. Parimycin: Isolation and Structure Elucidation of a Novel Cytotoxic 2,3‐Dihydroquinizarin. Analogue of γ‐Indomycinone from a Marine Streptomycete Isolate.
R. P. Maskey, E. Helmke, H. Fiebig, H. Laatsch
20033 citations
Semantic Scholar
Secondary Metabolites of Marine Bacteria. Part 10. δ-Indomycinone: A New Member of Pluramycin Class of Antibiotics Isolated from Marine Streptomyces sp.
M. Biabani, H. Laatsch, E. Helmke, H. Weyland
19983 citations
Semantic Scholar
Isolation and Structural Elucidation of Nitrogenous Secondary Metabolites from Terrestrial and Marine Streptomyces spp
Mohamed A. Shaaban, Khaled A. Shaaban, E. Helmke, I. Grün-Wollny +1 more
2017Natural Product Communications2 citations Open access
Semantic Scholar

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