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I. Helander · SciRah

Researcher profile · Semantic Scholar

I. Helander

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I. Helander — researcher profile on SciRah

h-index: 31
Works: 60
Citations: 8,283

Most-cited papers

Characterization of the action of selected essential oil components on gram-negative bacteria
I. Helander, H. Alakomi, K. Latva-Kala, T. Mattila-Sandholm +3 more
19981,758 citations Open access
Semantic Scholar
Chitosan disrupts the barrier properties of the outer membrane of gram-negative bacteria.
I. Helander, E. Nurmiaho-Lassila, R. Ahvenainen, J. Rhoades +1 more
2001Journal of food microbiology1,289 citations
Semantic Scholar
Lactic Acid Permeabilizes Gram-Negative Bacteria by Disrupting the Outer Membrane
H. Alakomi, E. Skyttä, M. Saarela, T. Mattila-Sandholm +2 more
2000Applied and Environmental Microbiology1,129 citations Open access
Semantic Scholar
Berry Phenolics: Antimicrobial Properties and Mechanisms of Action Against Severe Human Pathogens
L. Nohynek, H. Alakomi, M. Kähkönen, M. Heinonen +3 more
2006Nutrition and Cancer552 citations
Semantic Scholar
Fluorometric assessment of Gram‐negative bacterial permeabilization
I. Helander, T. Mattila-Sandholm
2000Journal of Applied Microbiology527 citations
Semantic Scholar
Potential of lactic acid bacteria and novel antimicrobials against Gram-negative bacteria
I. Helander, T. Mattila-Sandholm
1997316 citations
Semantic Scholar
Pulmonary function and symptoms after inhalation of endotoxin.
R. Rylander, B. Bake, J. Fischer, I. Helander
1989American Review of Respiratory Disease287 citations
Semantic Scholar
Low biological activity of Helicobacter pylori lipopolysaccharide
A. Muotiala, I. Helander, L. Pyhälä, T. Kosunen +1 more
1992Infection and Immunity257 citations Open access
Semantic Scholar
Compositional analysis of Helicobacter pylori rough-form lipopolysaccharides
A. P. Moran, I. Helander, T. U. Kosunen
1992Journal of Bacteriology192 citations Open access
Semantic Scholar
Characterization of the lipopolysaccharide from the polymyxin‐resistant pmrA mutants of Salmonella typhimurium
M. Vaara, T. Vaara, M. Jensen, I. Helander +3 more
1981FEBS Letters188 citations Open access
Semantic Scholar
Permeability barrier of the gram-negative bacterial outer membrane with special reference to nisin.
I. Helander, T. Mattila-Sandholm
2000Journal of food microbiology170 citations
Semantic Scholar
Weakening Effect of Cell Permeabilizers on Gram-Negative Bacteria Causing Biodeterioration
H. Alakomi, A. Paananen, M.-L. Suihko, I. Helander +1 more
2006Applied and Environmental Microbiology147 citations
Semantic Scholar
Lack of O‐antigen is essential for plasminogen activation by Yersinia pestis and Salmonella enterica
M. Kukkonen, M. Suomalainen, Päivi Kyllönen, K. Lähteenmäki +5 more
2003Molecular Microbiology141 citations
Semantic Scholar
Permeabilizing action of polyethyleneimine on Salmonella typhimurium involves disruption of the outer membrane and interactions with lipopolysaccharide.
I. Helander, K. Latva-Kala, K. Lounatmaa
1998Microbiology120 citations Open access
Semantic Scholar
Characterization of lipopolysaccharides of polymyxin-resistant and polymyxin-sensitive Klebsiella pneumoniae O3.
I. Helander, Y. Kato, I. Kilpeläinen, R. Kostiainen +4 more
1996European Journal of Biochemistry117 citations Open access
Semantic Scholar
Weakening of salmonella with selected microbial metabolites of berry-derived phenolic compounds and organic acids.
H. Alakomi, R. Puupponen-Pimiä, A. Aura, I. Helander +3 more
2007Journal of Agricultural and Food Chemistry103 citations Open access
Semantic Scholar
Microbiological methods for testing disinfectant efficiency on Pseudomonas biofilm.
G. Wirtanen, S. Salo, I. Helander, T. Mattila-Sandholm
2001Colloids and Surfaces B: Biointerfaces84 citations
Semantic Scholar
Effect of EDTA on Salmonella enterica serovar Typhimurium involves a component not assignable to lipopolysaccharide release.
H. Alakomi, M. Saarela, I. Helander
2003Microbiology79 citations Open access
Semantic Scholar
Bacteriophage T4 resistant mutants of the plant pathogen Erwinia carotovora.
M. Pirhonen, P. Heino, I. Helander, P. Harju +1 more
1988Microbial Pathogenesis79 citations
Semantic Scholar
New Salmonella typhimurium mutants with altered outer membrane permeability
S. Sukupolvi, Martti Vaara, I. Helander, P. Viljanen +1 more
1984Journal of Bacteriology75 citations Open access
Semantic Scholar
Pulmonary toxicity of endotoxins: comparison of lipopolysaccharides from various bacterial species
I. Helander, H. Saxén, M. Salkinoja-salonen, R. Rylander
1982Infection and Immunity51 citations Open access
Semantic Scholar
Pectinatus, Megasphaera and Zymophilus
A. Haikara, I. Helander
200648 citations
Semantic Scholar
Porphyromonas somerae sp. nov., a Pathogen Isolated from Humans and Distinct from Porphyromonas levii
P. Summanen, B. Durmaz, Marja-Liisa Väisänen, Cheng-Xu Liu +4 more
2005Journal of Clinical Microbiology46 citations Open access
Semantic Scholar
Morphological and physiological characteristics and lipopolysaccharide composition of N2-fixing (C2H2-reducing) root-associated Pseudomonas sp.
K. Haahtela, I. Helander, E. Nurmiaho-Lassila, V. Sundman
1983Canadian Journal of Microbiology (print)40 citations
Semantic Scholar
Outer Membrane Proteins and Lipopolysaccharides in Pathovars of Xanthomonas campestris
T. Ojanen, I. Helander, K. Haahtela, Timo K. Korhonen +1 more
1993Applied and Environmental Microbiology37 citations Open access
Semantic Scholar
rfaP mutants of Salmonella typhimurium.
I. Helander, M. Vaara, S. Sukupolvi, M. Rhen +3 more
1989European Journal of Biochemistry37 citations Open access
Semantic Scholar
Biochemical characterization of Campylobacter fetus lipopolysaccharides
A. Moran, D. O'Malley, J. Vuopio-Varkila, K. Varkila +3 more
1994FEMS Immunology & Medical Microbiology35 citations Open access
Semantic Scholar
Chemical structure and inhalation toxicity of lipopolysaccharides from bacteria on cotton
I. Helander, M. Salkinoja-salonen, R. Rylander
1980Infection and Immunity34 citations Open access
Semantic Scholar
Separation of two lipopolysaccharide populations with different contents of O‐antigen factor 122 in Salmonella enterica serovar Typhimurium
I. Helander, A. Moran, P. Mäkela
1992Molecular Microbiology32 citations
Semantic Scholar
Separation and characterization of two chemically distinct lipopolysaccharides in two Pectinatus species
I. Helander, R. Hurme, A. Haikara, A. Moran
1992Journal of Bacteriology32 citations Open access
Semantic Scholar
Lipopolysaccharides of anaerobic beer spoilage bacteria of the genus Pectinatus--lipopolysaccharides of a Gram-positive genus.
I. Helander, A. Haikara, I. Sadovskaya, E. Vinogradov +1 more
2004FEMS Microbiology Reviews31 citations
Semantic Scholar
Cellular fatty acyl and alkenyl residues in Megasphaera and Pectinatus species: contrasting profiles and detection of beer spoilage.
I. Helander, A. Haikara
1995Microbiology31 citations Open access
Semantic Scholar
Biological activities of lipoteichoic acid and peptidoglycan-teichoic acid of Bacillus subtilis 168 (Marburg).
J. Himanen, L. Pyhälä, R. Olander, O. Merimskaya +6 more
1993Journal of General Microbiology28 citations Open access
Semantic Scholar
Membrane proteins of Francisella tularensis LVS differ in ability to induce proliferation of lymphocytes from tularemia-vaccinated individuals.
H. Surcel, M. Sarvas, I. Helander, E. Herva
1989Microbial Pathogenesis27 citations
Semantic Scholar
Structures of the O-specific polysaccharide chains of Pectinatus cerevisiiphilus and Pectinatus frisingensis lipopolysaccharides.
Sof'ya N. Senchenkova, A. S. Shashkov, A. Moran, I. Helander +1 more
1995European Journal of Biochemistry23 citations Open access
Semantic Scholar
Toxic bacterial dusts associated with plants.
M. Salkinoja-salonen, I. Helander, R. Rylander
1982Society for Applied Bacteriology symposium series18 citations
Semantic Scholar
Preferential synthesis of heptaacyl lipopolysaccharide by the ssc permeability mutant of Salmonella typhimurium.
I. Helander, L. Hirvas, J. Tuominen, M. Vaara
1992European Journal of Biochemistry17 citations
Semantic Scholar
The structure of the carbohydrate backbone of the lipopolysaccharide of Pectinatus frisingensis strain VTT E-79104.
E. Vinogradov, Jianjun Li, I. Sadovskaya, Saïd Jabbouri +1 more
2004Carbohydrate Research15 citations
Semantic Scholar
Biochemical characterization of Campylobacter fetus lipopolysaccharides.
A. Moran, D. T. O'Malley, T. Kosunen, I. Helander
1994Infection and Immunity12 citations Open access
Semantic Scholar
Characterization of lipopolysaccharides of Pectinatus cerevisiophilus
I. Helander, E. Hakalehto, J. Ahvenainen, A. Haikara
198312 citations Open access
Semantic Scholar
Cleavage of the O antigen 4,5,12 of Salmonella typhimurium by hydrofluoric acid
I. Helander, V. Kitunen
1989FEBS Letters11 citations
Semantic Scholar
7 – The hurdle concept
H. Alakomi, E. Skyttä, I. Helander, R. Ahvenainen +2 more
200210 citations
Semantic Scholar
Acute pulmonary toxicity and pyrogenicity of inhaled lipid A
I. Helander
19829 citations Open access
Semantic Scholar
Biological activities of lipopolysaccharides from Pectinatus cerevisiophilus
I. Helander, K. Saukkonen, E. Hakalehto, M. Vaara
19848 citations Open access
Semantic Scholar
Alkali‐Treated LPS of Yersinia enterocolitica does not Induce Expression of E‐Selectin, ICAM‐1 or VCAM‐1 on Endothelial Cells but may Mediate Antibody‐ and Complement‐Dependent Cell Injury
H. Repo, R. Renkonen, I. Helander, M. Leirisalo-Repo
1994Scandinavian Journal of Immunology6 citations
Semantic Scholar
Ultrastructure of Gram-negative cotton bacteria with different pulmonary toxicities
Kari Lounatmaa, I. Helander
1982Infection and Immunity6 citations Open access
Semantic Scholar
A dairy cow model to assess aflatoxin transmission from feed into milk – Evaluating efficacy of the mycotoxin binder Mycosorb®
C. Moran, H. Kettunen, A. Yiannikouris, S. Ojanperä +3 more
20135 citations
Semantic Scholar
Structure of the exceptionally large nonrepetitive carbohydrate backbone of the lipopolysaccharide of Pectinatus frisingensis strain VTT E-82164.
E. Vinogradov, B. Petersen, I. Sadovskaya, Saïd Jabbouri +2 more
2003European Journal of Biochemistry5 citations
Semantic Scholar
Acute pulmonary toxicity of lipopolysaccharides in defined salt forms
I. Helander, J. Piiparinen, R. Rylander
19824 citations Open access
Semantic Scholar
Abstract form for the Irish Journal of Medical Science v workshop on gastroduodenal pathology and Helicobacter pylori July 5th — 7th 1992 — Dublin, Ireland
R. Logan, P. Gummett, M. Walker, Q. Karim +437 more
19923 citations
Semantic Scholar

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H. Alakomi×7
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A. Moran×6
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T. Mattila-Sandholm×5
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A. Haikara×5
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M. Salkinoja-salonen×4

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R. Rylander — researcher profile on SciRah

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L. Pyhälä — researcher profile on SciRah

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T. Kosunen — researcher profile on SciRah

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P. Mäkelä — researcher profile on SciRah

I. Sadovskaya×3

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I. Sadovskaya — researcher profile on SciRah