Jan Koek

503 total citations
10 papers, 420 citations indexed

About

Jan Koek is a scholar working on Pathology and Forensic Medicine, Biochemistry and Molecular Biology. According to data from OpenAlex, Jan Koek has authored 10 papers receiving a total of 420 indexed citations (citations by other indexed papers that have themselves been cited), including 5 papers in Pathology and Forensic Medicine, 4 papers in Biochemistry and 3 papers in Molecular Biology. Recurrent topics in Jan Koek's work include Phytochemicals and Antioxidant Activities (4 papers), Tea Polyphenols and Effects (4 papers) and Fermentation and Sensory Analysis (2 papers). Jan Koek is often cited by papers focused on Phytochemicals and Antioxidant Activities (4 papers), Tea Polyphenols and Effects (4 papers) and Fermentation and Sensory Analysis (2 papers). Jan Koek collaborates with scholars based in Netherlands, Germany and India. Jan Koek's co-authors include Ghada H. Yassin, Nikolai Kuhnert, Sujatha Jayaraman, Quirinus B. Broxterman, Lumbertus A. Hulshof, Adriaan J. Minnaard, Bernard Kaptein, Ton R. Vries, Richard M. Kellogg and Wolter ten Hoeve and has published in prestigious journals such as Angewandte Chemie International Edition, Journal of Agricultural and Food Chemistry and Food Chemistry.

In The Last Decade

Jan Koek

10 papers receiving 407 citations

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Jan Koek Netherlands	8	161	111	109	85	81	10	420
Hiroyuki Tsutsumi Japan	14	184 1.1×	62 0.6×	105 1.0×	94 1.1×	118 1.5×	33	494
Ran Wei China	11	98 0.6×	59 0.5×	50 0.5×	119 1.4×	96 1.2×	24	442
Silvia A. Coran Italy	15	57 0.4×	192 1.7×	41 0.4×	50 0.6×	149 1.8×	43	479
M. Bambagiotti‐Alberti Italy	13	70 0.4×	129 1.2×	52 0.5×	56 0.7×	171 2.1×	38	462
Jan P. Steynberg South Africa	16	77 0.5×	66 0.6×	224 2.1×	236 2.8×	348 4.3×	50	716
Tomasz Bieńkowski Poland	13	69 0.4×	115 1.0×	49 0.4×	92 1.1×	180 2.2×	25	441
Michael Klaes Germany	12	39 0.2×	117 1.1×	29 0.3×	161 1.9×	225 2.8×	13	486
Masashi Ueda Japan	6	26 0.2×	29 0.3×	148 1.4×	156 1.8×	42 0.5×	8	407
Franz W. Nader Germany	12	31 0.2×	99 0.9×	56 0.5×	292 3.4×	107 1.3×	31	524
Subhendu N. Ganguly United States	11	59 0.4×	17 0.2×	38 0.3×	455 5.4×	91 1.1×	17	598

Countries citing papers authored by Jan Koek

Since Specialization

Citations

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

Fields of papers citing papers by Jan Koek

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Jan Koek

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

All Works

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10 of 10 papers shown

Yassin, Ghada H., Jan Koek, & Nikolai Kuhnert. (2015). Model system-based mechanistic studies of black tea thearubigin formation. Food Chemistry. 180. 272–279. 35 indexed citations

Yassin, Ghada H., Jan Koek, & Nikolai Kuhnert. (2014). Identification of trimeric and tetrameric flavan-3-ol derivatives in the SII black tea thearubigin fraction of black tea using ESI-tandem and MALDI-TOF mass spectrometry. Food Research International. 63. 317–327. 18 indexed citations

Pawar, Vikas, et al.. (2014). Investigation of Processes in Black Tea Manufacture through Model Fermentation (Oxidation) Experiments. Journal of Agricultural and Food Chemistry. 62(31). 7854–7861. 99 indexed citations

Yassin, Ghada H., Jan Koek, Sujatha Jayaraman, & Nikolai Kuhnert. (2014). Identification of Novel Homologous Series of Polyhydroxylated Theasinensins and Theanaphthoquinones in the SII Fraction of Black Tea Thearubigins Using ESI/HPLC Tandem Mass Spectrometry. Journal of Agricultural and Food Chemistry. 62(40). 9848–9859. 34 indexed citations

Chang, Xiaowei, et al.. (2010). Concise Synthesis of Ring-Fission Metabolites of Epicatechin: 5-(3,4-Dihydroxybenzyl)dihydrofuran-2(3H)-one M6. Synthetic Communications. 40(22). 3346–3352. 5 indexed citations

Kaptein, Bernard, Adriaan J. Minnaard, Quirinus B. Broxterman, et al.. (1999). Asymmetric borane reduction using mixtures of homochiral amino alcohol ligands. Tetrahedron Asymmetry. 10(7). 1413–1418. 9 indexed citations

Vries, Ton R., Hans Wynberg, Erik van Echten, et al.. (1998). The Family Approach to the Resolution of Racemates. Angewandte Chemie International Edition. 37(17). 2349–2354. 164 indexed citations

Vries, Ton R., Hans Wynberg, Erik van Echten, et al.. (1998). Racematspaltungen mit Substanzfamilien. Angewandte Chemie. 110(17). 2491–2496. 40 indexed citations

Peters, Joop A., et al.. (1990). Structural and conformational effects on the complexation of calcium by 2,3-dicarboxy derivatives of β-cyclodextrin (cyclomaltoheptaose), amylose, and cellulose. Carbohydrate Research. 203(1). 19–32. 14 indexed citations

10.

Koek, Jan, et al.. (1983). Nickel(II) compounds containing racemic and optically active 2-amino-1-propanol. Inorganica Chimica Acta. 73. 11–19. 2 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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