Zobrazeno 1 - 10
of 150
pro vyhledávání: '"Teobald Kupka"'
Autor:
Teobald Kupka, Natalina Makieieva, Michał Jewgiński, Magdalena Witek, Barbara Blicharska, Oimahmad Rahmonov, Karel Doležal, Tomáš Pospíšil
Publikováno v:
Molecules, Vol 29, Iss 18, p 4382 (2024)
Caffeine is an alkaloid with a purine structure and has been well known for centuries due to its presence in popular drinks—tea and coffee. However, the structural and spectroscopic parameters of this compound, as well as its chemical and biologica
Externí odkaz:
https://doaj.org/article/3c453ef586b642198dd21f7bd7d81d8b
Publikováno v:
Biotechnologia Acta, Vol 16, Iss 3, Pp 5-23 (2023)
An analytical review of the biotechnological process of production of various hard and semi-hard cheeses in the EU and Ukraine, as well as domestic recipes of fermented cheeses for production at craft cheese factories and at home, was conducted. An a
Externí odkaz:
https://doaj.org/article/49d66905a9c140f999cce7899145fe7e
Publikováno v:
Biotechnologia Acta, Vol 16, Iss 1, Pp 40-50 (2023)
The article is devoted to highlighting the state and prospects for the development of organic production in Ukraine. The main requirements for the production, classification and labeling of organic products of animal and plant origin are presented. T
Externí odkaz:
https://doaj.org/article/4e3458e35d984a399ea8bed268d9f433
Publikováno v:
Molecules, Vol 27, Iss 23, p 8230 (2022)
The quality of theoretical NMR shieldings calculated at the quantum-chemical level depends on various theoretical aspects, of which the basis set type and size are among the most important factors. Nevertheless, not much information is available on t
Externí odkaz:
https://doaj.org/article/e97a72dfa4e24a14973ed33f0398994c
Autor:
Daria L. Melnikova, Zilya F. Badrieva, Mikhail A. Kostin, Corina Maller, Monika Stas, Aneta Buczek, Malgorzata A. Broda, Teobald Kupka, Anne-Marie Kelterer, Peter M. Tolstoy, Vladimir D. Skirda
Publikováno v:
Molecules, Vol 25, Iss 23, p 5706 (2020)
In this work, the nuclear magnetic resonance (NMR) and IR spectroscopic markers of the complexation between 5-fluorouracil (5-FU) and β-cyclodextrin (β-CD) in solid state and in aqueous solution are investigated. In the attenuated total reflectance
Externí odkaz:
https://doaj.org/article/65abf39edefe44e8bba9726a783f95fc
Publikováno v:
Molecules, Vol 25, Iss 17, p 3931 (2020)
We report on the density functional theory (DFT) modelling of structural, energetic and NMR parameters of uracil and its derivatives (5-halogenouracil (5XU), X = F, Cl, Br and I) in vacuum and in water using the polarizable continuum model (PCM) and
Externí odkaz:
https://doaj.org/article/0e8ceb8ca4014bad84a2ad6d3973e196
Publikováno v:
Advances in Materials Science and Engineering, Vol 2014 (2014)
Externí odkaz:
https://doaj.org/article/963c5994fd914c0c96444632439c09ac
Autor:
Natalina Makieieva, Teobald Kupka, Grzegorz Spaleniak, Oimahmad Rahmonov, Agata Marek, Alfred Błażytko, Leszek Stobiński, Nataliya Stadnytska, Danuta Pentak, Aneta Buczek, Małgorzata A. Broda, Piotr Kuś, Joachim Kusz, Maria Książek
Publikováno v:
Structural Chemistry. 33:2133-2145
Chelidonic acid (4-oxo-4H-pyran-2,6-dicarboxylic acid) is present in plants of Papaveraceae family, especially in Chelidonium majus. Due to its anticancer, antibacterial, hepatoprotective, and antioxidant properties, it has been used in medical treat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ae5b9bdaa96439161990d640b81f5fd3
https://doi.org/10.1007/s11224-022-02026-7
https://doi.org/10.1007/s11224-022-02026-7
Publikováno v:
International Journal of Environmental Research and Public Health
Volume 20
Issue 5
Pages: 3887
Volume 20
Issue 5
Pages: 3887
Anthropogenic ecological ecosystems create favourable conditions for the growth of the nitrophilous medicinal species Chelidonium majus in six urban parks in Southern Poland. This study focuses on the concentrations of trace elements in the soils, le
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::952d00a0c09aab7df75c605f77ccea52
Publikováno v:
Structural Chemistry. 32(1):275-283
The problem of aromaticity in heterocyclic rings of uracil and its 5-halogenoderivatives (5XU) was analyzed theoretically by calculating modified harmonic oscillator model of aromaticity (HOMA) for Heterocycle Electron Delocalization (HOMHED), nucleu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5eb47cd17fa4e1ecdec40fc0a7f4c442
https://link.springer.com/article/10.1007/s11224-020-01682-x
https://link.springer.com/article/10.1007/s11224-020-01682-x