Keith Helliwell

1.2k total citations
11 papers, 965 citations indexed

About

Keith Helliwell is a scholar working on Pathology and Forensic Medicine, Biochemistry and Molecular Biology. According to data from OpenAlex, Keith Helliwell has authored 11 papers receiving a total of 965 indexed citations (citations by other indexed papers that have themselves been cited), including 5 papers in Pathology and Forensic Medicine, 5 papers in Biochemistry and 2 papers in Molecular Biology. Recurrent topics in Keith Helliwell's work include Phytochemicals and Antioxidant Activities (5 papers), Tea Polyphenols and Effects (5 papers) and Berberine and alkaloids research (2 papers). Keith Helliwell is often cited by papers focused on Phytochemicals and Antioxidant Activities (5 papers), Tea Polyphenols and Effects (5 papers) and Berberine and alkaloids research (2 papers). Keith Helliwell collaborates with scholars based in United Kingdom, United States and Austria. Keith Helliwell's co-authors include Huafu Wang, Gordon J. Provan, J W Fairbairn and W. Kubelka and has published in prestigious journals such as Food Chemistry, Trends in Food Science & Technology and Food Research International.

In The Last Decade

Keith Helliwell

11 papers receiving 886 citations

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Keith Helliwell United Kingdom	8	521	512	276	168	128	11	965
Bernd Weinreich Germany	9	272 0.5×	278 0.5×	192 0.7×	114 0.7×	131 1.0×	11	715
Józef Korczak Poland	22	352 0.7×	680 1.3×	493 1.8×	136 0.8×	248 1.9×	54	1.5k
Frank Otto Germany	7	269 0.5×	241 0.5×	138 0.5×	80 0.5×	91 0.7×	17	574
Ana Belščak Croatia	8	317 0.6×	466 0.9×	351 1.3×	141 0.8×	73 0.6×	8	857
Ebru Pelvan Türkiye	17	361 0.7×	501 1.0×	447 1.6×	110 0.7×	128 1.0×	30	1.1k
Howard M. Merken United States	6	133 0.3×	429 0.8×	207 0.8×	105 0.6×	243 1.9×	7	804
Matteo Bonoli Italy	12	123 0.2×	440 0.9×	357 1.3×	218 1.3×	93 0.7×	15	917
Yongwen Jiang China	21	804 1.5×	478 0.9×	697 2.5×	184 1.1×	117 0.9×	48	1.2k
Dejiang Ni China	23	699 1.3×	425 0.8×	573 2.1×	202 1.2×	256 2.0×	55	1.4k
Dunja Horžić Croatia	12	697 1.3×	754 1.5×	623 2.3×	233 1.4×	117 0.9×	16	1.6k

Countries citing papers authored by Keith Helliwell

Since Specialization

Citations

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

Fields of papers citing papers by Keith Helliwell

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Keith Helliwell

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

All Works

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11 of 11 papers shown

Kubelka, W., et al.. (2017). Quality Standards for Herbal Drugs and Herbal Drug Preparations – Appropriate or Improvements Necessary?. Planta Medica. 84(06/07). 350–360. 27 indexed citations

Wang, Huafu, Gordon J. Provan, & Keith Helliwell. (2003). Determination of hamamelitannin, catechins and gallic acid in witch hazel bark, twig and leaf by HPLC. Journal of Pharmaceutical and Biomedical Analysis. 33(4). 539–544. 54 indexed citations

Wang, Huafu, Gordon J. Provan, & Keith Helliwell. (2003). HPLC determination of catechins in tea leaves and tea extracts using relative response factors. Food Chemistry. 81(2). 307–312. 137 indexed citations

Wang, Huafu, Gordon J. Provan, & Keith Helliwell. (2002). Determination of bronopol and its degradation products by HPLC. Journal of Pharmaceutical and Biomedical Analysis. 29(1-2). 387–392. 22 indexed citations

Wang, Huafu & Keith Helliwell. (2001). Determination of flavonols in green and black tea leaves and green tea infusions by high-performance liquid chromatography. Food Research International. 34(2-3). 223–227. 216 indexed citations

Wang, Huafu, Gordon J. Provan, & Keith Helliwell. (2000). Tea flavonoids: their functions, utilisation and analysis. Trends in Food Science & Technology. 11(4-5). 152–160. 294 indexed citations

Wang, Huafu, et al.. (2000). Isocratic elution system for the determination of catechins, caffeine and gallic acid in green tea using HPLC. Food Chemistry. 68(1). 115–121. 188 indexed citations

Helliwell, Keith, et al.. (1987). Determination of the aryltetralin lignan content of podophyllum resins and roots/rhizomes. Journal of Pharmacy and Pharmacology. 39(9). 738–739. 3 indexed citations

Fairbairn, J W & Keith Helliwell. (1977). Papaver bracteatum Lindley: thebaine content in relation to plant development. Journal of Pharmacy and Pharmacology. 29(1). 65–69. 5 indexed citations

10.

Helliwell, Keith & J W Fairbairn. (1976). Isolation of meconic acid from Papaver, section Macrantha (Oxytona). Journal of Pharmacy and Pharmacology. 28(12). 940–940. 1 indexed citations

11.

Fairbairn, J W & Keith Helliwell. (1975). The determination of thebaine in Papaver bracteatum Lindl by gas-liquid chromatography. Journal of Pharmacy and Pharmacology. 27(4). 217–221. 18 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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