TY - JOUR AU - Murillo, Enrique AU - Nagy, Veronika AU - Menchaca, Dania AU - Deli, József AU - Agócs, Attila TI - Changes in the Carotenoids of Zamia dressleri Leaves during Development JF - PLANTS-BASEL J2 - PLANTS-BASEL VL - 13 PY - 2024 IS - 9 PG - 11 SN - 2223-7747 DO - 10.3390/plants13091251 UR - https://m2.mtmt.hu/api/publication/34832995 ID - 34832995 AB - It has been observed that the leaves of some Zamia species undergo a kind of “reverse ripening”; that is, they change from their original brown color to green during development. We assumed that this strange color change was due to the change in carotenoid composition, so we followed the changes for several weeks. The detailed carotenoid composition and content at different stages of development of the leaves was determined with HPLC-DAD focusing on the changes in red and yellow carotenoids. The total and relative amounts of red and yellow carotenoids were determined simultaneously from one measurement from a saponified and/or unsaponified extract. At the beginning of development, the concentration of red carotenoids was higher than that of the yellow ones; it decreased drastically until 22 days and continued to decrease slowly until they completely disappeared. The concentration of yellow carotenoids decreased at the beginning as well, but after 22 days it started to increase. The amount of red carotenoids started to decrease when the leaflet stopped growing. Lutein is the main component in old leaflets, which is not a red carotenoid precursor. Red carotenoids can always be found in their esterified form in the leaves. These findings support the hypothesis that red and yellow carotenoid accumulation are independent and probably have different functions in the leaflet. The strange color change was explained based on the compartmentalization of red and yellow carotenoids and on the changing activity of the enzyme capsanthin–capsorubin synthase responsible for the synthesis of red carotenoids capsorubin and capsanthin. LA - English DB - MTMT ER - TY - CONF AU - Koloh, Regina AU - Farkas, Ágnes AU - Balázs, Viktória Lilla AU - Kocsis, Béla ED - Kovács, Bettina ED - Glázer-Kniesz, Adrienn ED - Tislér, Ádám TI - A gesztenyeméz biofilm képződést gátló hatása T2 - Absztraktkötet: XII. Interdiszciplináris Doktorandusz Konferencia = Book of Abstract: XII. Interdisciplinary Doctoral Conference PB - Pécsi Tudományegyetem Doktorandusz Önkormányzat C1 - Pécs SN - 9789636262457 PY - 2024 SP - 87 EP - 87 PG - 1 UR - https://m2.mtmt.hu/api/publication/34814487 ID - 34814487 LA - Hungarian DB - MTMT ER - TY - CONF AU - Nagy, Anett AU - Ormai, Edit AU - Horváth, Györgyi AU - Kocsis, Béla AU - Balázs, Viktória Lilla ED - Kovács, Bettina ED - Glázer-Kniesz, Adrienn ED - Tislér, Ádám TI - Mi az evidenciaalapú megközelítés alapján megítélt összefüggés a Pseudomonas aeruginosa baktérium és a kakukkfű illóolaj között? T2 - Absztraktkötet: XII. Interdiszciplináris Doktorandusz Konferencia = Book of Abstract: XII. Interdisciplinary Doctoral Conference PB - Pécsi Tudományegyetem Doktorandusz Önkormányzat C1 - Pécs SN - 9789636262457 PY - 2024 SP - 86 EP - 86 PG - 1 UR - https://m2.mtmt.hu/api/publication/34814458 ID - 34814458 LA - Hungarian DB - MTMT ER - TY - CONF AU - Ángyán, Virág Diána AU - Farkas, Ágnes AU - Kocsis, Béla AU - Radványi, Lilla ED - Kovács, Bettina ED - Glázer-Kniesz, Adrienn ED - Tislér, Ádám TI - Hársméz, levendula illóolaj és kombinációjuk antibakteriális aktivitása T2 - Absztraktkötet: XII. Interdiszciplináris Doktorandusz Konferencia = Book of Abstract: XII. Interdisciplinary Doctoral Conference PB - Pécsi Tudományegyetem Doktorandusz Önkormányzat C1 - Pécs SN - 9789636262457 PY - 2024 SP - 85 EP - 85 PG - 1 UR - https://m2.mtmt.hu/api/publication/34814440 ID - 34814440 LA - Hungarian DB - MTMT ER - TY - CONF AU - Ormai, Edit AU - Kocsis, Béla AU - Böszörményi, Andrea AU - Horváth, Györgyi AU - Balázs, Viktória Lilla ED - Kovács, Bettina ED - Glázer-Kniesz, Adrienn ED - Tislér, Ádám TI - Nozokomiális patogének és a szegfűszeg illóolaj kapcsolatának bemutatása evidenciaalapú megközelítésben T2 - Absztraktkötet: XII. Interdiszciplináris Doktorandusz Konferencia = Book of Abstract: XII. Interdisciplinary Doctoral Conference PB - Pécsi Tudományegyetem Doktorandusz Önkormányzat C1 - Pécs SN - 9789636262457 PY - 2024 SP - 83 EP - 83 PG - 1 UR - https://m2.mtmt.hu/api/publication/34814410 ID - 34814410 LA - Hungarian DB - MTMT ER - TY - CONF AU - Shubail, Sarah AU - Csikós, Eszter AU - Kemény, Ágnes AU - Jaber, Areej AU - Utczás, Margita AU - Horváth, Györgyi ED - Szabó, Szilvia TI - Növényi kivonatok vizsgálata in vivo kontakt dermatisz modellben T2 - Abstract Book of the 7th International Cholnoky Symposium PY - 2024 SP - 25 EP - 25 PG - 1 UR - https://m2.mtmt.hu/api/publication/34795176 ID - 34795176 LA - Hungarian DB - MTMT ER - TY - CONF AU - Nagy, Anett AU - Ormai, Edit AU - Horváth, Györgyi AU - Kocsis, Béla AU - Balázs, Viktória Lilla ED - Szabó, Szilvia TI - Négy gyógyszerkönyvi illóolaj antibakteriális hatásának vizsgálata a Pseudomonas aeruginosa baktériummal szemben T2 - Abstract Book of the 7th International Cholnoky Symposium PY - 2024 SP - 23 EP - 23 PG - 1 UR - https://m2.mtmt.hu/api/publication/34795108 ID - 34795108 LA - Hungarian DB - MTMT ER - TY - CONF AU - Koloh, Regina AU - Farkas, Ágnes AU - Kocsis, Béla AU - Kocsis, Marianna AU - Balázs, Viktória Lilla ED - Szabó, Szilvia TI - A gesztenyeméz biofilmgátló hatása az idő függvényében T2 - Abstract Book of the 7th International Cholnoky Symposium PY - 2024 SP - 21 EP - 21 PG - 1 UR - https://m2.mtmt.hu/api/publication/34795054 ID - 34795054 LA - Hungarian DB - MTMT ER - TY - CONF AU - Ormai, Edit AU - Kocsis, Béla AU - Böszörményi, Andrea AU - Horváth, Györgyi AU - Balázs, Viktória Lilla ED - Szabó, Szilvia TI - A borsmenta illóolaj hatása kórházi környezetben előforduló patogéneken T2 - Abstract Book of the 7th International Cholnoky Symposium PY - 2024 SP - 19 EP - 19 PG - 1 UR - https://m2.mtmt.hu/api/publication/34795038 ID - 34795038 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Balázs, Viktória Lilla AU - Böszörményi, Andrea AU - Kocsis, Béla AU - Horváth, Györgyi TI - Gram-negative rough mutants used as test bacteria can increase sensitivity of direct bioautography JF - JPC - JOURNAL OF PLANAR CHROMATOGRAPHY - MODERN TLC J2 - J PLANAR CHROMATOGR MOD TLC PY - 2024 SN - 0933-4173 DO - 10.1007/s00764-024-00293-0 UR - https://m2.mtmt.hu/api/publication/34753258 ID - 34753258 N1 - * Megosztott szerzőség AB - Currently, the antimicrobial activity of essential oils (EOs) is an outstanding research field due to antibiotic resistance of microorganisms. Thin-layer chromatography‒direct bioautography (TLC‒DB) is an effective, fast method to find components with antimicrobial activity in a mixture of plant compounds, e.g., in EOs. The volatility and hydrophobic characters of EOs require special experimental conditions, and disc diffusion assay is not appropriate to explore the antimicrobial activity of them. The aim of this study was to use “R” mutants, which are more sensitive to synthetic antimicrobial drugs, in DB to increase the sensitivity of this method. Our hypothesis was that these mutants show sensitivity to some EOs (thyme, clove, and peppermint) as well. The chemical composition of our tested EOs was measured with gas chromatography‒mass spectrometry (GC‒MS). The main compounds (39.8% thymol, 78.8% eugenol, and 50.4% menthol) of EOs showed notable antibacterial activity in TLC‒DB. Based on our results, we suggest to use Salmonella minnesota Re595 rough strain as test bacterium in bioautography, because it showed the highest sensitivity to the tested antibiotics (gentamicin and cephalexin) and EOs. Furthermore, this rough mutant could make TLC‒DB more faster, because only 4 h incubation time was enough to detect the inhibition zones of the active compounds used in this study. LA - English DB - MTMT ER -