Roland Appel

834 total citations
22 papers, 610 citations indexed

About

Roland Appel is a scholar working on Organic Chemistry, Epidemiology and Endocrinology, Diabetes and Metabolism. According to data from OpenAlex, Roland Appel has authored 22 papers receiving a total of 610 indexed citations (citations by other indexed papers that have themselves been cited), including 9 papers in Organic Chemistry, 7 papers in Epidemiology and 4 papers in Endocrinology, Diabetes and Metabolism. Recurrent topics in Roland Appel's work include Sepsis Diagnosis and Treatment (7 papers), Chemical Reaction Mechanisms (7 papers) and Asymmetric Synthesis and Catalysis (5 papers). Roland Appel is often cited by papers focused on Sepsis Diagnosis and Treatment (7 papers), Chemical Reaction Mechanisms (7 papers) and Asymmetric Synthesis and Catalysis (5 papers). Roland Appel collaborates with scholars based in Germany, Switzerland and United States. Roland Appel's co-authors include Herbert Mayr, Nicolai F. Hartmann, E. Kreuzer, Karl Werdan, Günter Pilz, Sami Lakhdar, Robert Loos, Takahiro Tokuyasu, Konstantin Troshin and Saloua Chelli and has published in prestigious journals such as Journal of the American Chemical Society, Angewandte Chemie International Edition and SHILAP Revista de lepidopterología.

In The Last Decade

Roland Appel

21 papers receiving 593 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Roland Appel Germany 12 416 77 63 58 50 22 610
James Wilfred Cook United States 10 131 0.3× 51 0.7× 8 0.1× 55 0.9× 17 0.3× 29 339
R. Venkataramanan India 13 338 0.8× 26 0.3× 25 0.4× 126 2.2× 27 0.5× 40 617
Brian C. Netzel United States 14 170 0.4× 43 0.6× 58 0.9× 134 2.3× 47 0.9× 29 614
Le Lu China 14 138 0.3× 35 0.5× 26 0.4× 305 5.3× 5 0.1× 34 621
Takashi Honjo Japan 16 340 0.8× 124 1.6× 151 2.4× 97 1.7× 25 0.5× 32 755
Chandan Patel India 15 218 0.5× 42 0.5× 65 1.0× 151 2.6× 31 0.6× 29 559
Xiaofan Zheng United States 11 143 0.3× 43 0.6× 45 0.7× 75 1.3× 35 0.7× 22 392
Philipp Nitschke Germany 14 111 0.3× 115 1.5× 16 0.3× 272 4.7× 64 1.3× 28 660
Sebastian Reiter Germany 16 147 0.4× 72 0.9× 17 0.3× 198 3.4× 21 0.4× 45 671
Chris Bell United States 15 96 0.2× 24 0.3× 13 0.2× 136 2.3× 95 1.9× 39 587

Countries citing papers authored by Roland Appel

Since Specialization
Citations

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

Fields of papers citing papers by Roland Appel

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Roland Appel

This figure shows the co-authorship network connecting the top 25 collaborators of Roland Appel. A scholar is included among the top collaborators of Roland Appel 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 Roland Appel. Roland Appel is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Appel, Roland, et al.. (2014). Quantification of Ion‐Pairing Effects on the Nucleophilic Reactivities of Benzoyl‐ and Phenyl‐Substituted Carbanions in Dimethylsulfoxide. Chemistry - A European Journal. 21(2). 875–884. 24 indexed citations
2.
Appel, Roland, Saloua Chelli, Takahiro Tokuyasu, Konstantin Troshin, & Herbert Mayr. (2013). Electrophilicities of Benzaldehyde-Derived Iminium Ions: Quantification of the Electrophilic Activation of Aldehydes by Iminium Formation. Journal of the American Chemical Society. 135(17). 6579–6587. 61 indexed citations
3.
Appel, Roland & Herbert Mayr. (2011). Quantification of the Electrophilic Reactivities of Aldehydes, Imines, and Enones. Journal of the American Chemical Society. 133(21). 8240–8251. 106 indexed citations
4.
Appel, Roland & Herbert Mayr. (2010). Nucleophilic Reactivities of Sulfur Ylides and Related Carbanions: Comparison with Structurally Related Organophosphorus Compounds. Chemistry - A European Journal. 16(29). 8610–8614. 63 indexed citations
5.
Appel, Roland, Nicolai F. Hartmann, & Herbert Mayr. (2010). Scope and Limitations of Cyclopropanations with Sulfur Ylides. Journal of the American Chemical Society. 132(50). 17894–17900. 76 indexed citations
6.
Lakhdar, Sami, Roland Appel, & Herbert Mayr. (2009). How Does Electrostatic Activation Control Iminium‐Catalyzed Cyclopropanations?. Angewandte Chemie International Edition. 48(27). 5034–5037. 35 indexed citations
7.
Lakhdar, Sami, Roland Appel, & Herbert Mayr. (2009). Wie werden Iminium‐katalysierte Cyclopropanierungen durch elektrostatische Aktivierung gesteuert?. Angewandte Chemie. 121(27). 5134–5137. 14 indexed citations
8.
Appel, Roland, Robert Loos, & Herbert Mayr. (2008). Nucleophilicity Parameters for Phosphoryl-Stabilized Carbanions and Phosphorus Ylides: Implications for Wittig and Related Olefination Reactions. Journal of the American Chemical Society. 131(2). 704–714. 47 indexed citations
9.
Appel, Roland, et al.. (2008). Nucleophilicities of the Anions of Arylacetonitriles and Arylpropionitriles in Dimethyl Sulfoxide. The Journal of Organic Chemistry. 74(1). 75–81. 48 indexed citations
10.
Appel, Roland & Folkert Kuiken. (2006). Nederlands als tweede taal. Geschiedenis van een jong vakgebied. UvA-DARE (University of Amsterdam). 2 indexed citations
11.
Groß-Fengels, W., et al.. (2002). PACS: Vom Projekt zur Realität. Der Radiologe. 42(2). 119–124. 9 indexed citations
12.
Verhallen, Marian J. A. J., Rob Schoonen, & Roland Appel. (2001). Verdiepen van woordkennis: een empirische studie naar de effecten van een trainingsprogramma. SHILAP Revista de lepidopterología. 78(4). 239–255. 1 indexed citations
13.
Pilz, Günter, Roland Appel, E. Kreuzer, & Karl Werdan. (1997). Comparison of Early IgM-Enriched Immunoglobulin vs Polyvalent IgG Administration in Score-Identified Postcardiac Surgical Patients at High Risk for Sepsis. CHEST Journal. 111(2). 419–426. 35 indexed citations
14.
Pilz, G., E. Kreuzer, Roland Appel, & Karl Werdan. (1997). PROCALCITONIN (PCT) SERUM LEVELS IN THE EARLY POSTOPERATIVE OF CARDIAC SURGICAL PATIENTS AT HIGH RISK FOR SEPSIS.. Shock. 7(Supplement). 124–124. 1 indexed citations
15.
Pilz, Georg, Roland Appel, E. Kreuzer, et al.. (1996). Bedeutung erhöhter TNF-Rezeptorspiegel bei herzchirurgischen Risikopatienten. Transfusion Medicine and Hemotherapy. 23(Suppl. 4). 29–34. 1 indexed citations
16.
Pilz, Günter, Peter Fraunberger, Roland Appel, et al.. (1996). Early prediction of outcome in score-identified, postcardiac surgical patients at high risk for sepsis, using soluble tumor necrosis factor receptor-p55 concentrations. Critical Care Medicine. 24(4). 596–600. 51 indexed citations
17.
Kühl, Peter, et al.. (1996). ARDS im Kindesalter. Monatsschrift Kinderheilkunde. 144(10). 1110–1116. 4 indexed citations
18.
Pilz, Günter, E. Kreuzer, Stefan Kääb, Roland Appel, & Karl Werdan. (1994). Early Sepsis Treatment With Immunoglobulins After Cardiac Surgery in Score-identified High-risk Patients. CHEST Journal. 105(1). 76–82. 28 indexed citations
19.
Pilz, G., Roland Appel, E. Kreuzer, & Karl Werdan. (1994). COMPARISON OF EARLY IgG VS. IgGMA ADMINISTRA-TION IN SCORE-IDENTIFIED POST-CARDIAC SURGICAL PATIENTS AT HIGH RISK FOR SEPSIS.. Shock. 2(Supplement). 17–17. 1 indexed citations
20.
Appel, Roland. (1990). Helmut Kohl im Spiegel seiner Macht. Bouvier eBooks. 1 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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