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Olen nõus

Kati Helmja

https://www.etis.ee/CV/Kati_Helmja/est
29.03.1980
5244561
kati@tftak.eu

Teenistuskäik

Töökohad ja ametid
01.08.2011–...   
AS Toidu- ja Fermentatsioonitehnoloogia Arenduskeskus, Teadur (1,00)
01.09.2010–31.08.2011   
Tallinna Tehnikaülikool, Matemaatika-loodusteaduskond, Keemiainstituut, Analüütilise keemia õppetool, Assistent (1,00)
01.09.2008–31.08.2010   
Tallinna Tehnikaülikool, Matemaatika-loodusteaduskond, Keemiainstituut, Anorgaanilise keemia õppetool, Assistent (1,00)
01.01.2006–31.12.2007   
Põllumajandusuuringute Keskus, peaspetsialist
 
 
Haridustee
2005–2010   
Tallinna Tehnikaülikool, doktor
2003–2005   
Tallinna Tehnikaülikool, magister
1998–2003   
Tallinna Tehnikaülikool, bakalaureus

Kvalifikatsioon

Teaduskraadid
Kati Helmja, doktorikraad, 2010, (juh) Merike Vaher; Mihkel Kaljurand, Determination of phenolic compounds and their antioxidative capability in plant extracts (Meetodid fenoolsete ühendite määramiseks ja nende antioksüdatiivuse hindamiseks), Tallinna Tehnikaülikool, Matemaatika-loodusteaduskond, Keemiainstituut.
Kati Helmja, magistrikraad (teaduskraad), 2005, (juh) Mihkel Kaljurand, Optimization of the conditions of the bioprocess analysis using on-line capillary electrophoresis (Bioprotsesside reaalajas toimuva kapillaarelektroforeesi analüüsi tingimuste optimeerimine), Tallinna Tehnikaülikool, Matemaatika-loodusteaduskond, Keemiainstituut.
 
 
Teadustöö põhisuunad
ETIS KLASSIFIKAATOR: 4. Loodusteadused ja tehnika; 4.11. Keemia ja keemiatehnika; TÄPSUSTUS: Kapillaarelektroforees, bioaktiivsed ühendid
ETIS KLASSIFIKAATOR: 4. Loodusteadused ja tehnika; 4.11. Keemia ja keemiatehnika

Juhendatud väitekirjad

Publikatsioonid

Klass
Aasta
Publikatsioon
 
1.1.
2012
Vaher, M.; Helmja, K.; Käsper, A.; Kurasin, M.; Väljamäe, P.; Kudrjasova, M.; Koel, M.; Kaljurand, M. (2012). Capillary electrophoretic monitoring of hydrothermal pre-treatment and enzymatic hydrolysis of willow: comparison with HPLC and NMR. Catalysis Today, 196 (1), 34−41.10.1016/j.cattod.2012.02.047.
1.1.
2011
Helmja, K.; Vaher, M.; Püssa, T.; Orav, A.; Viitak, A.; Levandi, T.; Kaljurand, M. (2011). Variation in the composition of the essential oils, phenolic compounds and mineral elements of Hypericum perforatum L. growing in Estonia. Natural Product Research, 25 (5), 496−510.10.1080/14786411003792165.
5.2.
2011
Helmja, K.; Käsper, A.; Kudrjasova, M.; Vaher, M. (2011). Capillary electrophoretic monitoring of products of enzymatic digestion of willow sawdust. Abstract Book & Program: nternational Conference on Materials and Technologies for Green chemistry. Ed. M. Borissova. Tallinn, Estonia: Tallinn University of Technology Press, 105.
5.2.
2011
Vaher, M.; Helmja, K.; Käsper, A.; Kudrjasova, M.; Gorbatsova, J.; Kaljurand, M. (2011). Determination of Carbohydrates in Cellulose and Enzymatically Pretreated Wood Fractions Using Capillary Electrophoresis. Program and Abstract Book: Nordic Separation Science Society 6th Conference, Riga, Latvia, August 24th-27th, 2011. Ed. H.Kazoka. Riga, Latvia: Latvian Institute of Organic synthesis, 98.
1.1.
2010
Schmitz, A.; Thormann, W.; Moessner, L.; Theurillat, R.; Helmja, K.; Mevissen, M. (2010). Enantioselective CE analysis of hepatic ketamine metabolism in different species in vitro. Electrophoresis, 31, 1506−1516.10.1002/elps.200900703.
1.1.
2010
Vaher, M.; Matso, K.; Levandi, T.; Helmja, K.; Kaljurand, M. (2010). Phenolic compounds and antioxidant activity of bran, flour and whole grain of different wheat varieties. Procedia Chemistry, 2, 76−82.
5.2.
2010
Knjazeva, T.; Makarõtševa, N.; Kobrin, E-G.; Helmja, K.; Seiman, A.; Vaher, M.; Kaljurand, M. (2010). Portatiivne kapillaarelektroforeesi aparaat keskkonnareostuse analüüsiks. XXXI Eesti Keemiapäevad/31st Estonian Chemistry Days; Tallinn, 2010.
1.1.
2009
Helmja, K.; Vaher, M.; Püssa, T.; Kaljurand, M. (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.
1.1.
2009
Helmja, K.; Borissova, M.; Knjazeva, T.; Jaanus, M.; Muinasmaa, U.; Kaljurand, M.; Vaher, M. (2009). Fraction collection in capillary electrophoresis for various stand-alone mass spectrometers. Journal of Chromatography A, 1216 (17), 3666−3673.
5.2.
2009
Matso, K; Levandi, T; Helmja, K; Vaher, M (2009). Comparison of the composition of phenolic acids and antioxidativity of different wheat varieties. Abstract Book and Program: 5th Conference on Separation and Related Techniques by Nordic Science Society: 5th Conference on Separation and Related Techniques by Nordic Science Society, Tallinn, Estonia, 2009. Ed. M.Borissova, M. Vaher. Tallinn: Tallinn Technical University Press, 116.
5.2.
2009
Orav, A; Viitak, A., Helmja, K., Vaher, M. (2009). Identification of bioactive compounds in leaves and stems of Aegopodium podagraria by various analytical technics. Abstract Book and Program: NoSSS 2009: 5th Conference on Separation and Related Techniques by Nordic Separation Science Society, Tallinn, Estonia, 26-29 Aug 2009. Ed. Maria Borissova, Merike Vaher. Tallinn: Tallinn Technical University Press, 144.
5.2.
2009
Püssa, Tõnu; Vaher, Merike; Helmja, Kati; Raudsepp, Piret; Kaljurand, Mihkel (2009). Methods of comparative analysis of the free radical scavenging capability of components of antioxidant mixtures, oral presentation. Abstract Book and Program: 5th Conference of Nordic Separation Science Society, Tallinn, 26-29 August, 2009. Ed. Maria Borissova, Merike Vaher. Tallinn: Tallinn Technical University Press, 56−56.
1.1.
2008
Helmja, K.; Vaher, M.; Püssa, T.; Raudsepp, P.; Kaljurand, M. (2008). Evaluation of antioxidative capability of the tomato (Solanum lycopersicum) skin constituents by capillary electrophoresis and high-perfoemance liquid chromatography. Electrophoresis, 3980−3988.
5.2.
2008
Helmja, K.; Vaher, M.; Orav, A.; Viitak, A.; Püssa, T.; Kaljurand, M. (2008). Comprehensive investigation of St. John's Wort (Hypericum perforatum): polyphenolic compounds, essential oils and metals. 14th International Symposium on Separation Science, Primosten, Croatia, 30 Sept - 3 Oct 2008. Zagreb: Croatian Society of Chemical Engeneerings, 59.
5.2.
2008
Vaher, M.; Borissova, M.:; Kaljurand, M.; Helmja, K. (2008). Development of fraction collection system for off-line capillary electrophoresis-mass-spectrometry. 16th International Symposium on Capillary Electroseparation Techniques, August 31-September 4, 2008, Iatly.
5.2.
2008
Raudsepp, Piret; Helmja, Kati; Raal, Ain; Vaher, Merike; Püssa, Tõnu (2008). Comparitive study of antioxidant capacity of Rheum raponticum root polyphenols. International conference on polyphenols, Salamanca, 8-11 juuli 2008.
1.1.
2007
Helmja, K.; Vaher, M.; Püssa, T.; Kamsol, K.; Orav, A.; Kaljurand, M. (2007). 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.
1.2.
2007
Helmja, K.; Vaher, M.; Gorbatsova, J.; Kaljurand, M. (2007). Characterization of bioactive compounds contained in vegetables of the Solanaceae family by capillary electrophoresis. Proceedings of the Estonian Academy of Sciences. Chemistry, 56 (4), 172−186.
5.2.
2007
Helmja, K.; Gorbatshova, J.; Vaher, M.; Püssa, T.; Kaljurand, M. (2007). Complex study of bioactive compounds in egglant (Solanum Melongena). Abstracts book: 4th Nordic Separation Science Society (NoSSS) International Conference, Kaunas, August 26-29, 2007.. Kaunas: Vytautas Magnus University Press, 77.
1.1.
2006
Tahkoniemi, H.; Helmja, K.; Menert, A.; Kaljurand, M. (2006). Fermentation reactor coupled with capillary electropherophoresis for on-line bioprocess monitoring. Journal of Pharmaceutical and Biomedical Analysis, 41 (5), 1585−1591. DOI: 10.1016/j.jpba.2006.01.042.
5.2.
2005
Menert, A.; Michelis, M.; Helmja, K.; Tahkoniemi, H.; Vaalu, T.; Malsub, T.; Vilu, R.; Kaljurand, M. (2005). Study of VFAs formation during anaerobic digestion of thermally treated sludge by respirometric Oxitop® method. Proceedings: Kalmar Eco-Tech '05 Conference on Waste to Energy, Bioremediation and Leachate Treatment, Kalmar, Sweden, 28 - 30 November 2005. Ed. W. Hogland, T. Broby. Kalmar, Sweden: RVFs UTVECKLINGSSATSNING DEPONERING , 563−564. (Rapport nr 3, 2005).
1.2.
2004
Helmja, Kati; Kaljurand, Mihkel; Kudrjashova, Marina; Tahkoniemi, Heli (2004). Capillary electrophoretic monitoring of microbial growth: determination of organic acids. Proceedings of the Estonian Academy of Sciences. Chemistry, 53 (2), 51−64.
18.04.2019

Kati Helmja

https://www.etis.ee/CV/Kati_Helmja/eng
29.03.1980
5244561
kati@tftak.eu

Career

Institutions and positions
01.08.2011–...   
Center of Food and Fermentation Technologies, Researcher (1,00)
01.09.2010–31.08.2011   
Tallinn University of Technology , Faculty of Science, Department of Chemistry, Chair of Analytical Chemistry, Assistant (1,00)
01.09.2008–31.08.2010   
Tallinn University of Technology , Faculty of Science, Department of Chemistry, Chair of Inorganic Chemistry, Assistant (1,00)
01.01.2006–31.12.2007   
Agricultural Research Centre, cheaf specialist
 
 
Education
2005–2010   
Tallinn University of Technology, PhD
2003–2005   
Tallinn University of Technology, Master of Sciences
1998–2003   
Tallinn University of Technology, bachelor

Qualifications

Academic degrees
Kati Helmja, Doctor's Degree, 2010, (sup) Merike Vaher; Mihkel Kaljurand, Determination of phenolic compounds and their antioxidative capability in plant extracts, Tallinn University of Technology Faculty of Science, Department of Chemistry.
Kati Helmja, Research Master's Degree, 2005, (sup) Mihkel Kaljurand, Optimization of the conditions of the bioprocess analysis using on-line capillary electrophoresis, Tallinn University of Technology Faculty of Science, Department of Chemistry.
 
 
Fields of research
ETIS CLASSIFICATION: 4. Natural Sciences and Engineering; 4.11. Chemistry and Chemical Technology
 
 

Supervised dissertations

Publications

Category
Year
Publication
 
1.1.
2012
Vaher, M.; Helmja, K.; Käsper, A.; Kurasin, M.; Väljamäe, P.; Kudrjasova, M.; Koel, M.; Kaljurand, M. (2012). Capillary electrophoretic monitoring of hydrothermal pre-treatment and enzymatic hydrolysis of willow: comparison with HPLC and NMR. Catalysis Today, 196 (1), 34−41.10.1016/j.cattod.2012.02.047.
1.1.
2011
Helmja, K.; Vaher, M.; Püssa, T.; Orav, A.; Viitak, A.; Levandi, T.; Kaljurand, M. (2011). Variation in the composition of the essential oils, phenolic compounds and mineral elements of Hypericum perforatum L. growing in Estonia. Natural Product Research, 25 (5), 496−510.10.1080/14786411003792165.
5.2.
2011
Helmja, K.; Käsper, A.; Kudrjasova, M.; Vaher, M. (2011). Capillary electrophoretic monitoring of products of enzymatic digestion of willow sawdust. Abstract Book & Program: nternational Conference on Materials and Technologies for Green chemistry. Ed. M. Borissova. Tallinn, Estonia: Tallinn University of Technology Press, 105.
5.2.
2011
Vaher, M.; Helmja, K.; Käsper, A.; Kudrjasova, M.; Gorbatsova, J.; Kaljurand, M. (2011). Determination of Carbohydrates in Cellulose and Enzymatically Pretreated Wood Fractions Using Capillary Electrophoresis. Program and Abstract Book: Nordic Separation Science Society 6th Conference, Riga, Latvia, August 24th-27th, 2011. Ed. H.Kazoka. Riga, Latvia: Latvian Institute of Organic synthesis, 98.
1.1.
2010
Schmitz, A.; Thormann, W.; Moessner, L.; Theurillat, R.; Helmja, K.; Mevissen, M. (2010). Enantioselective CE analysis of hepatic ketamine metabolism in different species in vitro. Electrophoresis, 31, 1506−1516.10.1002/elps.200900703.
1.1.
2010
Vaher, M.; Matso, K.; Levandi, T.; Helmja, K.; Kaljurand, M. (2010). Phenolic compounds and antioxidant activity of bran, flour and whole grain of different wheat varieties. Procedia Chemistry, 2, 76−82.
5.2.
2010
Knjazeva, T.; Makarõtševa, N.; Kobrin, E-G.; Helmja, K.; Seiman, A.; Vaher, M.; Kaljurand, M. (2010). Portatiivne kapillaarelektroforeesi aparaat keskkonnareostuse analüüsiks. XXXI Eesti Keemiapäevad/31st Estonian Chemistry Days; Tallinn, 2010.
1.1.
2009
Helmja, K.; Vaher, M.; Püssa, T.; Kaljurand, M. (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.
1.1.
2009
Helmja, K.; Borissova, M.; Knjazeva, T.; Jaanus, M.; Muinasmaa, U.; Kaljurand, M.; Vaher, M. (2009). Fraction collection in capillary electrophoresis for various stand-alone mass spectrometers. Journal of Chromatography A, 1216 (17), 3666−3673.
5.2.
2009
Matso, K; Levandi, T; Helmja, K; Vaher, M (2009). Comparison of the composition of phenolic acids and antioxidativity of different wheat varieties. Abstract Book and Program: 5th Conference on Separation and Related Techniques by Nordic Science Society: 5th Conference on Separation and Related Techniques by Nordic Science Society, Tallinn, Estonia, 2009. Ed. M.Borissova, M. Vaher. Tallinn: Tallinn Technical University Press, 116.
5.2.
2009
Orav, A; Viitak, A., Helmja, K., Vaher, M. (2009). Identification of bioactive compounds in leaves and stems of Aegopodium podagraria by various analytical technics. Abstract Book and Program: NoSSS 2009: 5th Conference on Separation and Related Techniques by Nordic Separation Science Society, Tallinn, Estonia, 26-29 Aug 2009. Ed. Maria Borissova, Merike Vaher. Tallinn: Tallinn Technical University Press, 144.
5.2.
2009
Püssa, Tõnu; Vaher, Merike; Helmja, Kati; Raudsepp, Piret; Kaljurand, Mihkel (2009). Methods of comparative analysis of the free radical scavenging capability of components of antioxidant mixtures, oral presentation. Abstract Book and Program: 5th Conference of Nordic Separation Science Society, Tallinn, 26-29 August, 2009. Ed. Maria Borissova, Merike Vaher. Tallinn: Tallinn Technical University Press, 56−56.
1.1.
2008
Helmja, K.; Vaher, M.; Püssa, T.; Raudsepp, P.; Kaljurand, M. (2008). Evaluation of antioxidative capability of the tomato (Solanum lycopersicum) skin constituents by capillary electrophoresis and high-perfoemance liquid chromatography. Electrophoresis, 3980−3988.
5.2.
2008
Helmja, K.; Vaher, M.; Orav, A.; Viitak, A.; Püssa, T.; Kaljurand, M. (2008). Comprehensive investigation of St. John's Wort (Hypericum perforatum): polyphenolic compounds, essential oils and metals. 14th International Symposium on Separation Science, Primosten, Croatia, 30 Sept - 3 Oct 2008. Zagreb: Croatian Society of Chemical Engeneerings, 59.
5.2.
2008
Vaher, M.; Borissova, M.:; Kaljurand, M.; Helmja, K. (2008). Development of fraction collection system for off-line capillary electrophoresis-mass-spectrometry. 16th International Symposium on Capillary Electroseparation Techniques, August 31-September 4, 2008, Iatly.
5.2.
2008
Raudsepp, Piret; Helmja, Kati; Raal, Ain; Vaher, Merike; Püssa, Tõnu (2008). Comparitive study of antioxidant capacity of Rheum raponticum root polyphenols. International conference on polyphenols, Salamanca, 8-11 juuli 2008.
1.1.
2007
Helmja, K.; Vaher, M.; Püssa, T.; Kamsol, K.; Orav, A.; Kaljurand, M. (2007). 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.
1.2.
2007
Helmja, K.; Vaher, M.; Gorbatsova, J.; Kaljurand, M. (2007). Characterization of bioactive compounds contained in vegetables of the Solanaceae family by capillary electrophoresis. Proceedings of the Estonian Academy of Sciences. Chemistry, 56 (4), 172−186.
5.2.
2007
Helmja, K.; Gorbatshova, J.; Vaher, M.; Püssa, T.; Kaljurand, M. (2007). Complex study of bioactive compounds in egglant (Solanum Melongena). Abstracts book: 4th Nordic Separation Science Society (NoSSS) International Conference, Kaunas, August 26-29, 2007.. Kaunas: Vytautas Magnus University Press, 77.
1.1.
2006
Tahkoniemi, H.; Helmja, K.; Menert, A.; Kaljurand, M. (2006). Fermentation reactor coupled with capillary electropherophoresis for on-line bioprocess monitoring. Journal of Pharmaceutical and Biomedical Analysis, 41 (5), 1585−1591. DOI: 10.1016/j.jpba.2006.01.042.
5.2.
2005
Menert, A.; Michelis, M.; Helmja, K.; Tahkoniemi, H.; Vaalu, T.; Malsub, T.; Vilu, R.; Kaljurand, M. (2005). Study of VFAs formation during anaerobic digestion of thermally treated sludge by respirometric Oxitop® method. Proceedings: Kalmar Eco-Tech '05 Conference on Waste to Energy, Bioremediation and Leachate Treatment, Kalmar, Sweden, 28 - 30 November 2005. Ed. W. Hogland, T. Broby. Kalmar, Sweden: RVFs UTVECKLINGSSATSNING DEPONERING , 563−564. (Rapport nr 3, 2005).
1.2.
2004
Helmja, Kati; Kaljurand, Mihkel; Kudrjashova, Marina; Tahkoniemi, Heli (2004). Capillary electrophoretic monitoring of microbial growth: determination of organic acids. Proceedings of the Estonian Academy of Sciences. Chemistry, 53 (2), 51−64.
18.04.2019

Otsi projekti

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Asutus on projekti finantseerija   Asutus on projekti teostaja  
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Kõik   Tavaprojektid   Ülemprojektid   Alamprojektid  
Uus Frascati (2015)
Uus ja vana Frascati (otsing uue järgi väljastab ka seotud vanad)
Kõik
Käimasolevad
Lõppenud
Algus
Hajus
Täpne
Lihtotsing Tühjenda
  • Leitud 8 kirjet
ProgrammLiikNumberNimiProjekti algusProjekti lõppVastutav täitjaAsutusFinantseerijapoolne rahastamine
SFSF0140023s08Analüütilised lahutusmeetodid biomeditsiinis ja keskkonnakeemias01.01.200831.12.2013Mihkel KaljurandTallinna Tehnikaülikool, Matemaatika-loodusteaduskond802 264,57 EUR
MUUG5145 (ETF5145)Bioprotsesside kapillaarelektroforeetiline seire01.01.200231.12.2004Mihkel KaljurandTallinna Tehnikaülikool; Tallinna Tehnikaülikool, Matemaatika-loodusteaduskond, Keemiainstituut, Analüütilise keemia õppetool28 312,86 EUR
ETFETF7818Fraktsioonide kogumine kapillaarelektroforeesis01.01.200931.12.2011Mihkel KaljurandTallinna Tehnikaülikool, Matemaatika-loodusteaduskond37 279,92 EUR
ETFETF6166Kapillaarelektroforeetiline seire proovi limiteeritud koguste korral01.01.200531.12.2007Mihkel KaljurandTallinna Tehnikaülikool, Matemaatika-loodusteaduskond29 143,71 EUR
ETFETF5889Keskkonnasaastajate anaeroobne degradatsioon humiinainete kui elektronaktseptorite juuresolekul01.01.200431.12.2006Anne MenertTallinna Tehnikaülikool, Matemaatika-loodusteaduskond29 541,77 EUR
SFSF0142500s03Keskkonnasõbralike analüütiliste lahutusmeetodite uurimine ja kasutamine bioloogiliselt aktiivsete ühendite määramiseks.01.01.200331.12.2007Mihkel KaljurandTallinna Tehnikaülikool, Matemaatika-loodusteaduskond440 095,61 EUR
ETFETF7303Poorsete nanomaterjalide modifitseerimine01.01.200831.12.2010Mihkel KoelTallinna Tehnikaülikool, Matemaatika-loodusteaduskond27 155,81 EUR
MUULKM8135Portatiivse analüsaatori arendamine16.12.200831.12.2010Mihkel KaljurandTallinna Tehnikaülikool; Tallinna Tehnikaülikool, Matemaatika-loodusteaduskond, Keemiainstituut281 211,25 EUR