Ilkka M. Helander

8.8k citations

69 papers · 7.1k indexed · 3 hit papers · h-index 31

Impact in

Food Science top 0.1%
- Essential Oils and Antimicrobial Activity
- Probiotics and Fermented Foods
Molecular Medicine top 0.5%
- Antibiotic Resistance in Bacteria

Papers in

Molecular Medicine 7
- Antibiotic Resistance in Bacteria 7
Food Science 22
- Salmonella and Campylobacter epidemiology 7
- Probiotics and Fermented Foods 7

Co-authors: Hanna‐Leena Alakomi T. Mattila-Sandholm Kyösti Latva‐Kala Tiina Mattila‐Sandholm Eeva‐Liisa Nurmiaho‐Lassila Jonathan Rhoades Raija Ahvenainen Sibel Roller
Journals: European Journal of Biochemistry (12 papers)Infection and Immunity (6 papers)Microbiology (5 papers)FEBS Letters (4 papers)Applied and Environmental Microbiology (3 papers)
Partner nations: Finland United States Germany

In The Last Decade

Ilkka M. Helander

68 papers receiving 6.7k citations

Hit Papers

align trajectories log scale

Chitosan disrupts the barrier properties of the outer membrane of Gram-negative bacteria 2001 · 1.1k citations

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if any of the following hold:

it has ≥500 total citations;
it reaches ≥1.5× the top-1% citation threshold for papers in the same subfield and year (the threshold is the minimum needed to enter the top 1%, not the average within it);
it reaches the top citation threshold in at least one of its specific research topics.

2001 International Journal of Food Microbiology
2000 Applied and Environmental Microbiology
1998 Journal of Agricultural and Food Chemistry

Peers

Countries citing papers authored by Ilkka M. Helander

Since Specialization

Citations

This map shows the geographic impact of Ilkka M. Helander's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Ilkka M. Helander with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Ilkka M. Helander more than expected).

Fields of papers citing papers by Ilkka M. Helander

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Ilkka M. Helander. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Ilkka M. Helander. The network helps show where Ilkka M. Helander may publish in the future.

Co-authors

The 25 scholars most cited alongside Ilkka M. Helander, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.

Border = papers with Ilkka M. Helander Line = papers co-authored together Ilkka M. Helander links everyone, so they are left out of the graph.

All Works

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20 of 20 papers shown

#	Work
1	The structure of the carbohydrate backbone of the lipopolysaccharide of Pectinatus frisingensis strain VTT E-79104 Carbohydrate Research ·Evgeny Vinogradov, Jianjun Li, Irina Sadovskaya, Saı̈d Jabbouri, Ilkka M. Helander	2004	12
2	Lipopolysaccharides of anaerobic beer spoilage bacteria of the genusPectinatus– lipopolysaccharides of a Gram-positive genus FEMS Microbiology Reviews ·Ilkka M. Helander, Auli Haikara, Irina Sadovskaya, Evgeny Vinogradov, Mirja Salkinoja‐Salonen	2004	17
3	Chitosan disrupts the barrier properties of the outer membrane of Gram-negative bacteria International Journal of Food Microbiology ·Ilkka M. Helander, Eeva‐Liisa Nurmiaho‐Lassila, Raija Ahvenainen, Jonathan Rhoades, Sibel Roller Hit paper breakdown →	2001	1078
4	Permeability barrier of the Gram-negative bacterial outer membrane with special reference to nisin International Journal of Food Microbiology ·Ilkka M. Helander, Tiina Mattila‐Sandholm	2000	132
5	Fluorometric assessment of Gram-negative bacterial permeabilization Journal of Applied Microbiology ·Ilkka M. Helander, T. Mattila-Sandholm	2000	417
6	Phosphate groups in lipopolysaccharides of Salmonella typhimurium rfaP mutants FEBS Letters ·Ilkka M. Helander, Ilkka Kilpeläinen, Martti Vaara	1997	9
7	Characterization of Lipopolysaccharides of Polymyxin‐Resistant and Polymyxin‐Sensitive Klebsiella pneumoniae O3 European Journal of Biochemistry ·Ilkka M. Helander, Yutaka Kato, Ilkka Kilpeläinen, Risto Kostiainen, Buko Lindner, Kim Nummila, Tsuyoshi Sugiyama, Takashi Yokochi	1996	94
8	Chemical Structure of the Lipid A Component of Lipopolysaccharides of the Genus Pectinatus European Journal of Biochemistry ·Ilkka M. Helander, Ilkka Kilpeläinen, Martti Vaara, Anthony P. Moran, Buko Lindner, Ulrich Seydel	1994	20
9	Assessment of non-protein impurities in potential vaccine proteins produced by Bacillus subtilis Vaccine ·Juha‐Pekka Himanen, Matti Sarvas, Ilkka M. Helander	1993	6
10	Biological activities of lipoteichoic acid and peptidoglycan--teichoic acid of Bacillus subtilis 168 (Marburg) Journal of General Microbiology ·Juha P. Himanen, L. Pyhälä, Rose‐Marie Ölander, O. Merimskaya, T. Kuzina, O. Lysyuk, А В Пронин, Sanin Av, Ilkka M. Helander, Matti Sarvas	1993	24
11	Defective biosynthesis of the lipid A component of temperature‐sensitive firA (omsA) Mutant of Escherichia coli European Journal of Biochemistry ·Ilkka M. Helander, Buko LINDNER, Ulrich Seydel, Martti Vaara	1993	13
12	Separation of two lipopolysaccharide populations with different contents of O‐antigen factor 12₂ in Salmonella enterica serovar Typhimurium Molecular Microbiology ·Ilkka M. Helander, Anthony P. Moran, P. Helena Mäkelä	1992	25
13	Bacterial Lipopolysaccharides: Relationship of Structure and Conformation to Endotoxic Activity, Serological Specificity and Biological Function Advances in experimental medicine and biology ·E. Rietschel, Lore Brade, Ulrich F. Schade, Ulrich Seydel, Ulrich Zähringer, Klaus Brandenburg, Ilkka M. Helander, Otto Holst, S. Kondo, H M Kuhn, Buko Lindner, E. Röhrscheidt, Ryszard Russa, Harald Labischinski, D. Naumann, Helmut Brade	1990	42
14	Cleavage of the O antigen 4,5,12 of Salmonella typhimurium by hydrofluoric acid FEBS Letters ·Ilkka M. Helander, Veikko Kitunen	1989	15
15	rfaP mutants of Salmonella typhimurium European Journal of Biochemistry ·Ilkka M. Helander, Martti Vaara, Soila Sukupolvi, Mikael Rhen, Sirkku Saarela, Ulrich Zähringer, P. Helena Mäkelä	1989	39
16	Lipopolysaccharides of three classes of supersensitive mutants ofSalmonella typhimurium FEMS Microbiology Letters ·Soila Sukupolvi, Ilkka M. Helander, Ritva Hukari, Martti Vaara, P. Helena Mäkelä	1985	7
17	Characterization of lipopolysaccharides of Pectinatus cerevisiophilus FEMS Microbiology Letters ·Ilkka M. Helander	1983	1
18	Characterization of lipopolysaccharides ofPectinatus cerevisiophilus FEMS Microbiology Letters ·Ilkka M. Helander, Elias Hakalehto, Juha Ahvenainen, Auli Haikara	1983	11
19	Acute pulmonary toxicity and pyrogenicity of inhaled lipid A FEMS Microbiology Letters ·Ilkka M. Helander	1982	9
20	Pulmonary toxicity of endotoxins: comparison of lipopolysaccharides from various bacterial species Infection and Immunity ·Ilkka M. Helander, Harri Saxén, Mirja Salkinoja‐Salonen, Ragnar Rylander	1982	46

About Ilkka M. Helander

Ilkka M. Helander is a scholar working on Molecular Medicine, Food Science, Microbiology, Endocrinology and Genetics, having authored 69 papers that have together received 7.1k indexed citations. Recurring topics across this work include Bacterial Genetics and Biotechnology (17 papers), Carbohydrate Chemistry and Synthesis (12 papers), Polysaccharides and Plant Cell Walls (10 papers), Immune Response and Inflammation (9 papers), Salmonella and Campylobacter epidemiology (7 papers), Glycosylation and Glycoproteins Research (7 papers), Antibiotic Resistance in Bacteria (7 papers) and Probiotics and Fermented Foods (7 papers). The work is most often cited by research in Food Science (2.7k citations), Molecular Medicine (556 citations), Microbiology (593 citations), Endocrinology (437 citations) and Biomaterials (972 citations). Ilkka M. Helander has collaborated with scholars based in Finland, United States and Germany. Frequent co-authors include Hanna‐Leena Alakomi, T. Mattila-Sandholm, Kyösti Latva‐Kala, Tiina Mattila‐Sandholm, Eeva‐Liisa Nurmiaho‐Lassila, Jonathan Rhoades, Raija Ahvenainen, Sibel Roller, Maria Saarela and Eddy J. Smid. Their work appears in journals such as European Journal of Biochemistry, Infection and Immunity, Microbiology, FEBS Letters and Applied and Environmental Microbiology.

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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