Kati Helmja

482 total citations
11 papers, 407 citations indexed

About

Kati Helmja is a scholar working on Biochemistry, Food Science and Molecular Biology. According to data from OpenAlex, Kati Helmja has authored 11 papers receiving a total of 407 indexed citations (citations by other indexed papers that have themselves been cited), including 6 papers in Biochemistry, 5 papers in Food Science and 3 papers in Molecular Biology. Recurrent topics in Kati Helmja's work include Phytochemicals and Antioxidant Activities (6 papers), Fermentation and Sensory Analysis (3 papers) and Metabolomics and Mass Spectrometry Studies (2 papers). Kati Helmja is often cited by papers focused on Phytochemicals and Antioxidant Activities (6 papers), Fermentation and Sensory Analysis (3 papers) and Metabolomics and Mass Spectrometry Studies (2 papers). Kati Helmja collaborates with scholars based in Estonia, Switzerland and Greece. Kati Helmja's co-authors include Mihkel Kaljurand, Merike Vaher, Tuuli Levandi, Tõnu Püssa, Anne Orav, Piret Raudsepp, Meike Mevissen, Wolfgang Thormann, Andrea Schmitz and Regula Theurillat and has published in prestigious journals such as Journal of Chromatography A, Catalysis Today and Electrophoresis.

In The Last Decade

Kati Helmja

11 papers receiving 392 citations

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Kati Helmja Estonia	9	133	129	113	103	76	11	407
Xiya Feng China	10	199 1.5×	94 0.7×	78 0.7×	80 0.8×	94 1.2×	12	405
Pimiao Huang China	10	207 1.6×	97 0.8×	135 1.2×	90 0.9×	113 1.5×	30	460
Heidrun Unterweger Austria	9	238 1.8×	176 1.4×	153 1.4×	123 1.2×	138 1.8×	10	567
Helena Čížková Czechia	14	207 1.6×	105 0.8×	88 0.8×	124 1.2×	89 1.2×	57	504
Armin Amanpour Türkiye	16	307 2.3×	122 0.9×	86 0.8×	111 1.1×	88 1.2×	28	581
Sonia Cortacero‐Ramírez Spain	12	161 1.2×	90 0.7×	94 0.8×	86 0.8×	150 2.0×	14	483
Orquídea Vasconcelos dos Santos Brazil	14	243 1.8×	181 1.4×	142 1.3×	160 1.6×	113 1.5×	59	589
Ilko Marekov Bulgaria	11	172 1.3×	58 0.4×	62 0.5×	75 0.7×	86 1.1×	20	410
J. Mauricio Peñarrieta Bolivia	13	209 1.6×	89 0.7×	97 0.9×	127 1.2×	83 1.1×	47	457

Countries citing papers authored by Kati Helmja

Since Specialization

Citations

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

Fields of papers citing papers by Kati Helmja

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Kati Helmja

This figure shows the co-authorship network connecting the top 25 collaborators of Kati Helmja. A scholar is included among the top collaborators of Kati Helmja 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 Kati Helmja. Kati Helmja 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

Vaher, Merike, Kati Helmja, Maria Kulp, et al.. (2014). Chemical composition of red wines made from hybrid grape and common grape (Vitis vinifera L.) cultivars; pp. 444–453. Proceedings of the Estonian Academy of Sciences. 63(4). 444–453. 7 indexed citations

Vaher, Merike, et al.. (2012). Capillary electrophoretic monitoring of hydrothermal pre-treatment and enzymatic hydrolysis of willow: Comparison with HPLC and NMR. Catalysis Today. 196(1). 34–41. 13 indexed citations

Helmja, Kati, Merike Vaher, Tõnu Püssa, et al.. (2011). Variation in the composition of the essential oils, phenolic compounds and mineral elements ofHypericum perforatumL. growing in Estonia. Natural Product Research. 25(5). 496–510. 21 indexed citations

Helmja, Kati, Merike Vaher, & Mihkel Kaljurand. (2011). Evaluation of the free radical scavenging capability of wheat extracts by capillary electrophoresis and multivariate curve resolution. Electrophoresis. 32(9). 1094–1100. 1 indexed citations

Schmitz, Andrea, et al.. (2010). Enantioselective CE analysis of hepatic ketamine metabolism in different species in vitro. Electrophoresis. 31(9). 1506–1516. 33 indexed citations

Vaher, Merike, et al.. (2010). Phenolic compounds and the antioxidant activity of the bran, flour and whole grain of different wheat varieties. Procedia Chemistry. 2(1). 76–82. 182 indexed citations

Helmja, Kati, Merike Vaher, Tõnu Püssa, & Mihkel Kaljurand. (2009). Analysis of the stable free radical scavenging capability of artificial polyphenol mixtures and plant extracts by capillary electrophoresis and liquid chromatography–diode array detection–tandem mass spectrometry. Journal of Chromatography A. 1216(12). 2417–2423. 41 indexed citations

Helmja, Kati, et al.. (2008). Fraction collection in capillary electrophoresis for various stand-alone mass spectrometers. Journal of Chromatography A. 1216(17). 3666–3673. 18 indexed citations

Helmja, Kati, Merike Vaher, Tõnu Püssa, Piret Raudsepp, & Mihkel Kaljurand. (2008). Evaluation of antioxidative capability of the tomato (Solanum lycopersicum) skin constituents by capillary electrophoresis and high‐performance liquid chromatography. Electrophoresis. 29(19). 3980–3988. 39 indexed citations

10.

Helmja, Kati, et al.. (2006). Bioactive components of the hop strobilus: Comparison of different extraction methods by capillary electrophoretic and chromatographic methods. Journal of Chromatography A. 1155(2). 222–229. 36 indexed citations

11.

Helmja, Kati, et al.. (2006). Fermentation reactor coupled with capillary electrophoresis for on-line bioprocess monitoring. Journal of Pharmaceutical and Biomedical Analysis. 41(5). 1585–1591. 16 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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