P Viljanen

589 total citations
15 papers, 504 citations indexed

About

P Viljanen is a scholar working on Molecular Medicine, Epidemiology and Microbiology. According to data from OpenAlex, P Viljanen has authored 15 papers receiving a total of 504 indexed citations (citations by other indexed papers that have themselves been cited), including 11 papers in Molecular Medicine, 6 papers in Epidemiology and 5 papers in Microbiology. Recurrent topics in P Viljanen's work include Antibiotic Resistance in Bacteria (11 papers), Antibiotics Pharmacokinetics and Efficacy (4 papers) and Pneumocystis jirovecii pneumonia detection and treatment (4 papers). P Viljanen is often cited by papers focused on Antibiotic Resistance in Bacteria (11 papers), Antibiotics Pharmacokinetics and Efficacy (4 papers) and Pneumocystis jirovecii pneumonia detection and treatment (4 papers). P Viljanen collaborates with scholars based in Finland, Japan and United States. P Viljanen's co-authors include Martti Vaara, P. Helena Mäkelä, Timo Vaara, Soila Sukupolvi, Pertti Koski, Ilkka M. Helander, Hisami Matsunaga, Yukio Kimura, P. Helena Mäkelä and T K Korhonen and has published in prestigious journals such as The Journal of Immunology, Biochemical and Biophysical Research Communications and Journal of Bacteriology.

In The Last Decade

P Viljanen

15 papers receiving 461 citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
P Viljanen Finland	10	211	202	163	104	91	15	504
Z Markiewicz Poland	15	162 0.8×	244 1.2×	112 0.7×	174 1.7×	160 1.8×	48	805
Toyoji Okubo Japan	11	221 1.0×	292 1.4×	86 0.5×	30 0.3×	23 0.3×	29	592
Ronan A. Murphy United Kingdom	9	213 1.0×	215 1.1×	84 0.5×	71 0.7×	138 1.5×	17	550
Aurel Negrea Sweden	10	153 0.7×	141 0.7×	144 0.9×	83 0.8×	125 1.4×	10	495
Deborah D. Jaworski United States	8	151 0.7×	353 1.7×	89 0.5×	150 1.4×	88 1.0×	8	763
María Fernández‐Reyes Spain	14	275 1.3×	257 1.3×	204 1.3×	29 0.3×	32 0.4×	16	614
Dolores Vargas Álvarez Spain	7	346 1.6×	123 0.6×	62 0.4×	69 0.7×	34 0.4×	15	531
Bushra Ilyas Canada	4	186 0.9×	157 0.8×	85 0.5×	61 0.6×	120 1.3×	6	434
Mélanie Falord France	7	147 0.7×	285 1.4×	153 0.9×	100 1.0×	93 1.0×	7	509
A. Alev Gerçeker Türkiye	12	94 0.4×	217 1.1×	135 0.8×	27 0.3×	66 0.7×	14	467

Countries citing papers authored by P Viljanen

Since Specialization

Citations

This map shows the geographic impact of P Viljanen'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 P Viljanen with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites P Viljanen more than expected).

Fields of papers citing papers by P Viljanen

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by P Viljanen. 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 P Viljanen. The network helps show where P Viljanen may publish in the future.

Co-authorship network of co-authors of P Viljanen

This figure shows the co-authorship network connecting the top 25 collaborators of P Viljanen. A scholar is included among the top collaborators of P Viljanen based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with P Viljanen. P Viljanen is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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15 of 15 papers shown

Yamamoto, Risako, et al.. (1995). In vitro selection of RNA aptamers that can bind specifically to Tat protein of HIV-1.. PubMed. 145–6. 9 indexed citations

Viljanen, P & Janusz Boratyński. (1991). The susceptibility of conjugative resistance transfer in Gram-negative bacteria to physicochemical and biochemical agents. FEMS Microbiology Letters. 88(1). 43–54. 17 indexed citations

Viljanen, P, Hisami Matsunaga, Yukio Kimura, & Martti Vaara. (1991). The outer membrane permeability-increasing action of deacylpolymyxins.. The Journal of Antibiotics. 44(5). 517–523. 47 indexed citations

Viljanen, P. (1991). The susceptibility of conjugative resistance transfer in Gram-negative bacteria to physicochemical and biochemical agents. FEMS Microbiology Letters. 88(1). 43–54. 3 indexed citations

Viljanen, P, Pertti Koski, & Martti Vaara. (1988). Effect of small cationic leukocyte peptides (defensins) on the permeability barrier of the outer membrane. Infection and Immunity. 56(9). 2324–2329. 42 indexed citations

Viljanen, P. (1987). Polycations which disorganize the outer membrane inhibit conjugation in Escherichia coli.. The Journal of Antibiotics. 40(6). 882–886. 7 indexed citations

Viljanen, P. (1987). The effect of polymyxin B nonapeptide (PMBN) on transformation. Biochemical and Biophysical Research Communications. 143(3). 923–927. 3 indexed citations

Nowicki, B., Jaana Vuopio‐Varkila, P Viljanen, T K Korhonen, & P. Helena Mäkelä. (1986). Fimbrial phase variation and systemic E. coli infection studied in the mouse peritonitis model. Microbial Pathogenesis. 1(4). 335–347. 48 indexed citations

Viljanen, P, Helena Käyhty, Martti Vaara, & Timo Vaara. (1986). Susceptibility of Gram-negative bacteria to the synergistic bactericidal action of serum and polymyxin B nonapeptide. Canadian Journal of Microbiology. 32(1). 66–69. 11 indexed citations

10.

Vaara, Martti & P Viljanen. (1985). Binding of polymyxin B nonapeptide to gram-negative bacteria. Antimicrobial Agents and Chemotherapy. 27(4). 548–554. 82 indexed citations

11.

Vaara, Martti, P Viljanen, Soila Sukupolvi, & Timo Vaara. (1985). Does polymyxin B nonapeptide increase outer membrane permeability in antibiotic supersensitive enterobacterial mutants?. FEMS Microbiology Letters. 26(3). 289–294. 16 indexed citations

12.

Viljanen, P & Martti Vaara. (1984). Susceptibility of gram-negative bacteria to polymyxin B nonapeptide. Antimicrobial Agents and Chemotherapy. 25(6). 701–705. 91 indexed citations

13.

Sukupolvi, Soila, Martti Vaara, Ilkka M. Helander, P Viljanen, & P. Helena Mäkelä. (1984). New Salmonella typhimurium mutants with altered outer membrane permeability. Journal of Bacteriology. 159(2). 704–712. 71 indexed citations

14.

Vaara, Martti, P Viljanen, Timo Vaara, & P. Helena Mäkelä. (1984). An outer membrane-disorganizing peptide PMBN sensitizes E. coli strains to serum bactericidal action.. The Journal of Immunology. 132(5). 2582–2589. 48 indexed citations

15.

Vaara, Martti & P Viljanen. (1983). Outer membrane phospholipase is not the mediator in the bactericidal or outer membrane permeability-increasing action of polycations. FEMS Microbiology Letters. 19(2-3). 253–256. 9 indexed citations

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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