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Content of essential oil and valerenic acids in valerian (Valeriana officinalis L.) roots at the selected developmental phases / Katarzyna Seidler-Lozykowska in The journal of essential oil research, Vol. 21 N° 5 (Septembre/Octobre 2009) 

Public ISBD [article]  in The journal of essential oil research > Vol. 21 N° 5 (Septembre/Octobre 2009) . - pp. 413-416 Titre : Content of essential oil and valerenic acids in valerian (Valeriana officinalis L.) roots at the selected developmental phases Type de document : texte imprimé Auteurs : Katarzyna Seidler-Lozykowska, Auteur ; Sebastian Mielcarek, Auteur ; Marek Baraniak, Auteur Article en page(s) : pp. 413-416 Note générale : Génie Chimique Langues : Anglais (eng) Mots-clés : Valeriana  officinalis  Valerianaceae  Valerian  Oil  yield  Valerenic  acid  Developmental  stage Index. décimale : 646 Résumé : The content of essential oil and valerenic acids and the yield of roots were analyzed in valerian cultivar ‘Polka’ and strain no. 4 during the nine following phases: the beginning of vegetation, spring rosette, pedicel development, the beginning of flowering, full bloom, seed harvest, three weeks after the seed harvest, fall rosette, and after the first frost. The yield of valerian roots was different at the investigated phases and in years of cultivation, while tested genotypes produced similar root yields. The highest contents of essential oil and valerenic acids were obtained at different phases by the tested genotypes: strain no. 4 in full bloom (1.3% and 0.266%, respectively) and cultivar ‘Polka’ three weeks after seed harvest (1.25%) and during seed harvest (0.218%). The lowest contents of the investigated substances were detected at the beginning of growth and after the first frost in both genotypes. The obtained results revealed significant differences in essential oil and valerenic acids content, which depend on genotype, plant age, harvest time and the year of cultivation. The results suggest that higher amounts of valerenic acids could be obtained in the second year of cultivation over the period from full bloom (0.278%) to fall rosette phase (0.316%). DEWEY : 665 ISSN : 1041-2905 En ligne : http://www.jeoronline.com/archive/detail/42#top [article] Content of essential oil and valerenic acids in valerian (Valeriana officinalis L.) roots at the selected developmental phases [texte imprimé] / Katarzyna Seidler-Lozykowska, Auteur ; Sebastian Mielcarek, Auteur ; Marek Baraniak, Auteur . - pp. 413-416. Génie Chimique Langues : Anglais (eng) in The journal of essential oil research > Vol. 21 N° 5 (Septembre/Octobre 2009) . - pp. 413-416 Mots-clés : Valeriana  officinalis  Valerianaceae  Valerian  Oil  yield  Valerenic  acid  Developmental  stage Index. décimale : 646 Résumé : The content of essential oil and valerenic acids and the yield of roots were analyzed in valerian cultivar ‘Polka’ and strain no. 4 during the nine following phases: the beginning of vegetation, spring rosette, pedicel development, the beginning of flowering, full bloom, seed harvest, three weeks after the seed harvest, fall rosette, and after the first frost. The yield of valerian roots was different at the investigated phases and in years of cultivation, while tested genotypes produced similar root yields. The highest contents of essential oil and valerenic acids were obtained at different phases by the tested genotypes: strain no. 4 in full bloom (1.3% and 0.266%, respectively) and cultivar ‘Polka’ three weeks after seed harvest (1.25%) and during seed harvest (0.218%). The lowest contents of the investigated substances were detected at the beginning of growth and after the first frost in both genotypes. The obtained results revealed significant differences in essential oil and valerenic acids content, which depend on genotype, plant age, harvest time and the year of cultivation. The results suggest that higher amounts of valerenic acids could be obtained in the second year of cultivation over the period from full bloom (0.278%) to fall rosette phase (0.316%). DEWEY : 665 ISSN : 1041-2905 En ligne : http://www.jeoronline.com/archive/detail/42#top

Effect of the selected weather conditions on essential oil, a-bisabolol and chamazulene content in flower heads of chamomile [Chamomilla recutita (L.) Rausch.] / Katarzyna Seidler-Lozykowska in The journal of essential oil research, Vol. 22 N° 1 (Janvier/Fevrier 2010) 

Public ISBD [article]  in The journal of essential oil research > Vol. 22 N° 1 (Janvier/Fevrier 2010) . - pp. 45-48 Titre : Effect of the selected weather conditions on essential oil, a-bisabolol and chamazulene content in flower heads of chamomile [Chamomilla recutita (L.) Rausch.] Type de document : texte imprimé Auteurs : Katarzyna Seidler-Lozykowska, Auteur Article en page(s) : pp. 45-48 Note générale : Génie Chimique Langues : Anglais (eng) Mots-clés : Chamomilla  recutita  Asteraceae  Oil  content  α-bisabolol  Chamazulene  Weather  conditions Index. décimale : 646 Résumé : In 1994–2003 samples of chamomile flowers were analyzed in order to determine the essential oil, α-bisabolol and chamazulene content. The correlation between changes in weather conditions and these active compound contents was estimated to understand the reason of significant differences over the years. The results showed different reactions of chamomile genotypes to weather conditions. High temperature and intensive insolation had a negative effect on the oil content, whereas it had a strongly positive effect on the α-bisabolol content. DEWEY : 665 ISSN : 1041-2905 En ligne : http://www.jeoronline.com/archive/detail/47 [article] Effect of the selected weather conditions on essential oil, a-bisabolol and chamazulene content in flower heads of chamomile [Chamomilla recutita (L.) Rausch.] [texte imprimé] / Katarzyna Seidler-Lozykowska, Auteur . - pp. 45-48. Génie Chimique Langues : Anglais (eng) in The journal of essential oil research > Vol. 22 N° 1 (Janvier/Fevrier 2010) . - pp. 45-48 Mots-clés : Chamomilla  recutita  Asteraceae  Oil  content  α-bisabolol  Chamazulene  Weather  conditions Index. décimale : 646 Résumé : In 1994–2003 samples of chamomile flowers were analyzed in order to determine the essential oil, α-bisabolol and chamazulene content. The correlation between changes in weather conditions and these active compound contents was estimated to understand the reason of significant differences over the years. The results showed different reactions of chamomile genotypes to weather conditions. High temperature and intensive insolation had a negative effect on the oil content, whereas it had a strongly positive effect on the α-bisabolol content. DEWEY : 665 ISSN : 1041-2905 En ligne : http://www.jeoronline.com/archive/detail/47