• 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 spectrometryHelmja, Kati; Vaher, Merike; Püssa, Tõnu; Kaljurand, MihkelJournal of chromatography A2009 / p. 2417-2423 : ill
• Bioactive components of the hop strobilus : comparison of different extraction methods by capillary electrophoretic and chromatographic methodsHelmja, Kati; Vaher, Merike; Püssa, Tõnu; Kamsol, Kristjan; Orav, Anne; Kaljurand, MihkelJournal of chromatography A2007 / p. 222-229 : ill https://www.academia.edu/60646251/Bioactive_components_of_the_hop_strobilus_Comparison_of_different_extraction_methods_by_capillary_electrophoretic_and_chromatographic_methods
• Bioaktiivsete ühendite lahutamine ja antioksüdatiivsuse hindamine maavitsaliste perekonda Solanaceae kuuluvatel taimedelHelmja, Kati; Vaher, Merike; Püssa, Tõnu; Kaljurand, MihkelXXX Eesti keemiapäevad : teaduskonverentsi teesid = 30th Estonian Chemistry Days : abstracts of scientific conference2007 / lk. 36-37
• Chemical Composition and Antibacterial Effect of Mentha spp. Grown in EstoniaKapp, Karmen; Püssa, Tõnu; Orav, Anne; Roasto, Mati; Raal, Ain; Vuorela, Pia; Vuorela, Heikki; Tammela, PäiviNatural product communications2020 / 14 p https://doi.org/10.1177/1934578X20977615 https://www.scopus.com/sourceid/17700155034 https://www.scopus.com/record/display.uri?eid=2-s2.0-85097412659&origin=inward&txGid=b869977bb1300f7e7de4e8d212553f87 https://jcr.clarivate.com/jcr-jp/journal-profile?journal=NAT%20PROD%20COMMUN&year=2022 https://www.webofscience.com/wos/woscc/full-record/WOS:000599497600001
• Chemical composition of red wines made from hybrid grape and common grape (Vitis vinifera L.) cultivarsPedastsaar, Priit; Vaher, Merike; Helmja, Kati; Kulp, Maria; Kaljurand, Mihkel; Karp, Kadri; Raal, Ain; Karathanos, Vaios; Püssa, TõnuProceedings of the Estonian Academy of Sciences2014 / p. 444-453 : ill https://artiklid.elnet.ee/record=b2707387*est
• Comparative study of antioxidant capacity of Rheum rhaponticum root polyphenolsRaudsepp, Piret; Helmja, Kati; Raal, Ain; Vaher, Merike; Püssa, TõnuXXIVth International Conference on Polyphenols : Polyphenols Communications 2008 : Salamanca, 8th-11th July 2008. Volume 12008 / p. 231-232 : ill https://www.researchgate.net/publication/286933217_Comparative_study_of_antioxidant_capacity_of_Rheum_rhaponticum_root_polyphenols
• Complex study of bioactive compounds in egglant (Solanum melongena)Helmja, Kati; Gorbatšova, Jelena; Vaher, Merike; Püssa, Tõnu; Kaljurand, Mihkel4th Nordic Separation Science Society (NoSSS) International Conference : Kaunas, August 26-29, 2007 : abstracts book2007 / p. 77
• Composition and antibacterial effect of mint flavorings in candies and food supplementsKapp, Karmen; Orav, Anne; Roasto, Mati; Raal, Ain; Püssa, Tõnu; Vuorela, Heikki; Tammela, Päivi; Vuorela, PiaPlanta medica2020 / p. 1089−1096 https://doi.org/10.1055/a-1158-1699 https://www.scopus.com/sourceid/21744 https://www.scopus.com/record/display.uri?eid=2-s2.0-85089994272&origin=inward&txGid=930e6eb070220aa10da8fdaa2e3756ea https://jcr.clarivate.com/jcr-jp/journal-profile?journal=PLANTA%20MED&year=2022 https://www.webofscience.com/wos/woscc/full-record/WOS:000578759300006
• Comprehensive investigation of St.John's Worth (Hypernicum perforatum) : polyphenolic compounds, essential oils and metalsHelmja, Kati; Vaher, Merike; Orav, Anne; Viitak, Anu; Püssa, Tõnu; Kaljurand, Mihkel14th International Symposium on Separation Science : Primosten, Croatia, 30 Sept. - 3 Oct. 20082008 / p. 59
• Content of essential oil, terpenoids and polyphenols in commercial chamomile (Chamomilla recutita L. Rauschert) teas from different countriesRaal, Ain; Orav, Anne; Püssa, Tõnu; Valner, Catri; Malmiste, Birgit; Arak, ElmarFood chemistry2012 / p. 632-638 : ill https://www.sciencedirect.com/science/article/pii/S0308814611013008
• Evaluation of antioxidative capability of the tomato (Solanum lycopersicum) skin constituents by capillary electrophoresis and high-performanced liquid chromatographyHelmja, Kati; Vaher, Merike; Püssa, Tõnu; Raudsepp, Piret; Kaljurand, MihkelElectrophoresis2008 / p. 3980-3988 : ill https://pubmed.ncbi.nlm.nih.gov/18958890/
• Methods of comparative analysis of the free radical scavenging capability of components of antioxidant mixturesPüssa, Tõnu; Vaher, Merike; Helmja, Kati; Raudsepp, Piret; Kaljurand, MihkelNoSSS2009 : 5th Conference on Separation and Related Techniques by Nordic Separation Science Society : 26-29 August, 2009, Tallinn University of Technology, Estonia : abstract book and program2009 / p. 56
• Mint flavorings from candies inhibit the infectivity of Chlamydia pneumoniaeHanski, Leena L.; Kapp, Karmen; Tiirola, Terttu M.; Orav, Anne; Vuorela, Heikki; Püssa, Tõnu; Vuorela, PiaNatural Product Communications2016 / p. 1725 - 1728 https://doi.org/10.1177/1934578x1601101125 https://www.scopus.com/sourceid/17700155034 https://www.scopus.com/record/display.uri?eid=2-s2.0-85019109269&origin=resultslist&sort=plf-f&src=s&sid=9e20c12559a378c4f5ae87ccea863399&sot=b&sdt=b&s=DOI%2810.1177%2F1934578x1601101125%29&sl=139&sessionSearchId=9e20c12559a378c4f5ae87ccea863399&relpos=0 https://jcr.clarivate.com/jcr-jp/journal-profile?journal=NAT%20PROD%20COMMUN&year=2016 https://www.webofscience.com/wos/woscc/full-record/WOS:000388251200025
• Oxidation products of free polyunsaturated fatty acids in wheat varietiesLevandi, Tuuli; Püssa, Tõnu; Vaher, Merike; Toomik, Peeter; Kaljurand, MihkelEuropean journal of lipid science and technology2009 / 7, p. 715-722 : ill https://www.researchgate.net/publication/230008245_Oxidation_products_of_free_polyunsaturated_fatty_acids_in_wheat_varieties
• Polüfenoolsete ühendite antioksüdatiivsuse hindamine kapillaarelektroforeetiliselt ja vedelik-kromatograafiliseltHelmja, Kati; Vaher, Merike; Püssa, Tõnu; Kaljurand, MihkelXXXI Eesti keemiapäevad : [28. aprill 2010, Tallinn] : teaduskonverentsi teesid = 31st Estonian Chemistry Days : abstracts of scientific conference2010 / lk. 31
• Polyphenolic composition and antichlamydial effect of commercial peppermint (Mentha x piperita L.) teasKapp, Karmen; Hakala, Elina; Püssa, Tõnu; Orav, Anne; Raal, Ain; Hanski, L.Planta medica2013 / p. 1224
• Principal component analysis of HPLC-MS/MS patterns of wheat (Triticum aestivum) varietiesLevandi, Tuuli; Püssa, Tõnu; Vaher, Merike; Ingver, Anne; Koppel, Reine; Kaljurand, MihkelProceedings of the Estonian Academy of Sciences2014 / p. 86-92 : ill https://artiklid.elnet.ee/record=b2665228*est
• Resveratrooli sisalduse uurimine Reynoutria japonica'sAaviksaar, A.; Haga, M.; Hansen, M.; Kann, Jüri; Koel, Mihkel; Püssa, Tõnu; Vaher, MerikeXXVII Eesti keemiapäevad : teaduskonverentsi ettekannete referaadid = 27th Estonian Chemistry Days : abstracts of scientific conference2001 / lk. 15
• A study of primary oxidation products of free polyunsaturated fatty acids in wheat varietiesVaher, Merike; Levandi, Tuuli; Püssa, Tõnu; Toomik, Peeter; Kaljurand, MihkelProceedings of World Congress on Oils and Fats & 28th ISF Congress : Sydney, Australia, 27-30 September2009 / ? p
• The evaluation of the oxidation capability of bioactive compounds of Solanum melongena by capillary electrophoresis and by HPLC-MS/MSHelmja, Kati; Vaher, Merike; Püssa, Tõnu; Kaljurand, MihkelXXIVth International Conference on Polyphenols : Polyphenols Communications 2008 : Salamanca, 8th-11th July 2008. Volume 12008 / p. 165-166 : ill
• Variation in the composition of the essential oils, phenolic compounds and mineral elements of Hypericum perforatum L. growing in EstoniaHelmja, Kati; Vaher, Merike; Püssa, Tõnu; Orav, Anne; Viitak, Anu; Levandi, Tuuli; Kaljurand, MihkelNatural product research2011 / p. 496-510