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Zibolenová J, Malobická E, Ulbrichtová R, Novák M, Chladná Z, Waczulíková I, Litvová S, Mikas J, Mečochová A, Hudečková H. Probability of exposure to the wild measles virus in adult population - Estimation from seroepidemiology and historical data. Vaccine 2024; 42:1648-1655. [PMID: 38342718 DOI: 10.1016/j.vaccine.2024.02.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Revised: 01/30/2024] [Accepted: 02/01/2024] [Indexed: 02/13/2024]
Abstract
Vaccination against measles is one of the most effective public health interventions which has saved millions of lives and interrupted circulation of the natural virus in the population. However, it is widely accepted that the immunity after vaccination can wane, especially in those who have had no contact with the virus. This study aimed to classify the particular birth cohorts of adults with regard to their exposure to the wild measles virus in the population with a long history of mandatory vaccination. We introduced two methods. In the first, we estimated the probability of exposure to the wild virus through an analysis of antibody levels from the Immunologic Survey performed in the Slovak Republic in 2018, while the second was based on historical epidemiological data. Both methods resulted in similar estimations. Cohorts born in Slovakia before 1964 can be considered to be cohorts in which most people were exposed to the wild measles virus. Cohorts born after 1977 can be designated as cohorts that most likely did not come into the contact with the wild virus. Cohorts born between 1965 and 1976 are composed of a mixture, with a decreasing proportion of people exposed to the wild virus with increasing year of birth. The proposed methods can help identify potential immunity gaps in the adult population. They can be applied in other countries with high measles vaccination coverage to estimate the probability of exposure to the wild measles virus in particular birth cohorts.
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Affiliation(s)
- Jana Zibolenová
- Department of Public Health, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Malá Hora 11149/4B, 036 01 Martin, Slovakia
| | - Eva Malobická
- Department of Public Health, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Malá Hora 11149/4B, 036 01 Martin, Slovakia
| | - Romana Ulbrichtová
- Department of Public Health, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Malá Hora 11149/4B, 036 01 Martin, Slovakia
| | - Martin Novák
- Department of Public Health, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Malá Hora 11149/4B, 036 01 Martin, Slovakia.
| | - Zuzana Chladná
- Department of Applied Mathematics and Statistics, Faculty of Mathematics, Physics and Informatics, Comenius University in Bratislava, Mlynská dolina F1, 842 48 Bratislava, Slovakia
| | - Iveta Waczulíková
- Department of Nuclear Physics and Biophysics, Faculty of Mathematics, Physics and Informatics, Comenius University in Bratislava, Mlynská dolina F1, 842 48 Bratislava, Slovakia
| | - Slávka Litvová
- Faculty of Healthcare, Alexander Dubcek University of Trencin, Trencin, Slovakia
| | - Ján Mikas
- Public Health Authority of the Slovak Republic, Trnavská cesta 52, 826 45 Bratislava, Slovakia
| | - Adriana Mečochová
- Public Health Authority of the Slovak Republic, Trnavská cesta 52, 826 45 Bratislava, Slovakia
| | - Henrieta Hudečková
- Department of Public Health, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Malá Hora 11149/4B, 036 01 Martin, Slovakia
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2
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Vrbová H, Kubišová M, Měřínská D, Novák M, Pata V, Knedlová J, Sedlačík M, Šuba O. The Implementation of Neural Networks for Polymer Mold Surface Evaluation. Micromachines (Basel) 2024; 15:102. [PMID: 38258221 PMCID: PMC10821243 DOI: 10.3390/mi15010102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 12/13/2023] [Accepted: 12/27/2023] [Indexed: 01/24/2024]
Abstract
This paper presents the measurement and evaluation of the surfaces of molds produced using additive technologies. This is an emerging trend in mold production. The surfaces of such molds must be treated, usually using laser-based alternative machining methods. Regular evaluation is necessary because of the gradually deteriorating quality of the mold surface. However, owing to the difficulty in scanning the original surface of the injection mold, it is necessary to perform surface replication. Therefore, this study aims to describe the production of surface replicas for in-house developed polymer molds together with the determination of suitable descriptive parameters, the method of comparing variances, and the mean values for the surface evaluation. Overall, this study presents a new summary of the evaluation process of replicas of the surfaces of polymer molds. The nonlinear regression methodology provides the corresponding functional dependencies between the relevant parameters. The statistical significance of a neural network with two hidden layers based on the principle of Rosenblatt's perceptron has been proposed and verified. Additionally, machine learning was utilized to better compare the original surface and its replica.
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Affiliation(s)
- Hana Vrbová
- Faculty of Technology, Tomas Bata University in Zlin, Vavreckova 5669, 760 01 Zlin, Czech Republic; (H.V.); (D.M.); (M.N.); (V.P.); (J.K.); (M.S.); (O.Š.)
| | - Milena Kubišová
- Faculty of Technology, Tomas Bata University in Zlin, Vavreckova 5669, 760 01 Zlin, Czech Republic; (H.V.); (D.M.); (M.N.); (V.P.); (J.K.); (M.S.); (O.Š.)
| | - Dagmar Měřínská
- Faculty of Technology, Tomas Bata University in Zlin, Vavreckova 5669, 760 01 Zlin, Czech Republic; (H.V.); (D.M.); (M.N.); (V.P.); (J.K.); (M.S.); (O.Š.)
| | - Martin Novák
- Faculty of Technology, Tomas Bata University in Zlin, Vavreckova 5669, 760 01 Zlin, Czech Republic; (H.V.); (D.M.); (M.N.); (V.P.); (J.K.); (M.S.); (O.Š.)
| | - Vladimir Pata
- Faculty of Technology, Tomas Bata University in Zlin, Vavreckova 5669, 760 01 Zlin, Czech Republic; (H.V.); (D.M.); (M.N.); (V.P.); (J.K.); (M.S.); (O.Š.)
| | - Jana Knedlová
- Faculty of Technology, Tomas Bata University in Zlin, Vavreckova 5669, 760 01 Zlin, Czech Republic; (H.V.); (D.M.); (M.N.); (V.P.); (J.K.); (M.S.); (O.Š.)
| | - Michal Sedlačík
- Faculty of Technology, Tomas Bata University in Zlin, Vavreckova 5669, 760 01 Zlin, Czech Republic; (H.V.); (D.M.); (M.N.); (V.P.); (J.K.); (M.S.); (O.Š.)
- Centre of Polymer Systems, University Institute, Tomas Bata University in Zlin, Trida T. Bati 5678, 760 01 Zlin, Czech Republic
| | - Oldřich Šuba
- Faculty of Technology, Tomas Bata University in Zlin, Vavreckova 5669, 760 01 Zlin, Czech Republic; (H.V.); (D.M.); (M.N.); (V.P.); (J.K.); (M.S.); (O.Š.)
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3
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Bouz G, Šlechta P, Jand'ourek O, Konečná K, Paterová P, Bárta P, Novák M, Kučera R, Dal NJK, Fenaroli F, Zemanová J, Forbak M, Korduláková J, Pavliš O, Kubíčková P, Doležal M, Zitko J. Correction to "Hybridization Approach Toward Novel Antituberculars: Design, Synthesis, and Biological Evaluation of Compounds Combining Pyrazinamide and 4-Aminosalicylic Acid". ACS Infect Dis 2023; 9:1674. [PMID: 37486740 DOI: 10.1021/acsinfecdis.3c00335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/25/2023]
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Zibolenová J, Hudečková H, Chladná Z, Malobická E, Novák M, Waczulíková I, Mikas J, Mečochová A. Quantification of Waning Immunity After Measles Vaccination-Evidence From a Seroprevalence Study. Am J Epidemiol 2023; 192:1379-1385. [PMID: 36935110 DOI: 10.1093/aje/kwad065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 12/07/2022] [Accepted: 03/14/2023] [Indexed: 03/21/2023] Open
Abstract
We aimed to quantify rates of waning immunity after measles vaccination from seroprevalence data collected in a study of a population with high vaccination coverage and a fixed vaccination schedule. Data were collected during a national survey (the Immunological Survey) carried out in the Slovak Republic in 2018. The average rate of waning immunity against measles after the first dose of measles, mumps, and rubella (MMR) vaccine (ages 1.5-10 years) was 9.7% per year from the geometric mean titer value of 2,634 mUI/mL. The average waning rate after the second dose of MMR vaccine (ages 10-33 years) was significantly lower: 4.8% per year from the lower geometric mean titer of 1,331 mUI/mL. This decline in antibody levels suggests that vaccine-induced protection may be compromised and results in an increase in the proportion of seronegative/borderline individuals. These outcomes may provide a valuable source for critical assessment of direct and indirect effects of MMR vaccination.
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Nawrot DE, Bouz G, Janďourek O, Konečná K, Paterová P, Bárta P, Novák M, Kučera R, Zemanová J, Forbak M, Korduláková J, Pavliš O, Kubíčková P, Doležal M, Zitko J. Antimycobacterial pyridine carboxamides: From design to in vivo activity. Eur J Med Chem 2023; 258:115617. [PMID: 37423128 DOI: 10.1016/j.ejmech.2023.115617] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 06/29/2023] [Accepted: 06/29/2023] [Indexed: 07/11/2023]
Abstract
Tuberculosis is the number one killer of infectious diseases caused by a single microbe, namely Mycobacterium tuberculosis (Mtb). The success rate of curing this infection is decreasing due to emerging antimicrobial resistance. Therefore, novel treatments are urgently needed. As an attempt to develop new antituberculars effective against both drugs-sensitive and drug-resistant Mtb, we report the synthesis of a novel series inspired by combining fragments from the first-line agents isoniazid and pyrazinamide (series I) and isoniazid with the second-line agent 4-aminosalicylic acid (series II). We identified compound 10c from series II with selective, potent in vitro antimycobacterial activity against both drug-sensitive and drug-resistant Mtb H37Rv strains with no in vitro or in vivo cytotoxicity. In the murine model of tuberculosis, compound 10c caused a statistically significant decrease in colony-forming units (CFU) in spleen. Despite having a 4-aminosalicylic acid fragment in its structure, biochemical studies showed that compound 10c does not directly affect the folate pathway but rather methionine metabolism. In silico simulations indicated the possibility of binding to mycobacterial methionine-tRNA synthetase. Metabolic study in human liver microsomes revealed that compound 10c does not have any known toxic metabolites and has a half-life of 630 min, overcoming the main drawbacks of isoniazid (toxic metabolites) and 4-aminosalicylic acid (short half-life).
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Affiliation(s)
- Daria Elżbieta Nawrot
- Faculty of Pharmacy in Hradec Králové, Charles University, Heyrovského 1203, 50005, Hradec Králové, Czech Republic.
| | - Ghada Bouz
- Faculty of Pharmacy in Hradec Králové, Charles University, Heyrovského 1203, 50005, Hradec Králové, Czech Republic.
| | - Ondřej Janďourek
- Faculty of Pharmacy in Hradec Králové, Charles University, Heyrovského 1203, 50005, Hradec Králové, Czech Republic.
| | - Klára Konečná
- Faculty of Pharmacy in Hradec Králové, Charles University, Heyrovského 1203, 50005, Hradec Králové, Czech Republic.
| | - Pavla Paterová
- Department of Clinical Microbiology, University Hospital, Sokolská 581, 500 05, Hradec, Králové, Czech Republic.
| | - Pavel Bárta
- Faculty of Pharmacy in Hradec Králové, Charles University, Heyrovského 1203, 50005, Hradec Králové, Czech Republic.
| | - Martin Novák
- Faculty of Pharmacy in Hradec Králové, Charles University, Heyrovského 1203, 50005, Hradec Králové, Czech Republic; Biomedical Research Center, University Hospital Hradec Kralove, Sokolská 581, 50005, Hradec Králové, Czech Republic.
| | - Radim Kučera
- Faculty of Pharmacy in Hradec Králové, Charles University, Heyrovského 1203, 50005, Hradec Králové, Czech Republic.
| | - Júlia Zemanová
- Department of Biochemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynská Dolina, Ilkovičova 6, 84215, Bratislava, Slovakia.
| | - Martin Forbak
- Department of Biochemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynská Dolina, Ilkovičova 6, 84215, Bratislava, Slovakia.
| | - Jana Korduláková
- Department of Biochemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynská Dolina, Ilkovičova 6, 84215, Bratislava, Slovakia.
| | - Oto Pavliš
- Military Health Institute, Military Medical Agency, Tychonova 1, 160 01, Prague 6, Czech Republic.
| | - Pavla Kubíčková
- Military Health Institute, Military Medical Agency, Tychonova 1, 160 01, Prague 6, Czech Republic.
| | - Martin Doležal
- Faculty of Pharmacy in Hradec Králové, Charles University, Heyrovského 1203, 50005, Hradec Králové, Czech Republic.
| | - Jan Zitko
- Faculty of Pharmacy in Hradec Králové, Charles University, Heyrovského 1203, 50005, Hradec Králové, Czech Republic.
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Naumann L, Haun A, Höchsmann A, Mohr M, Novák M, Flottmann D, Neusüß C. Augmented region of interest for untargeted metabolomics mass spectrometry (AriumMS) of multi-platform-based CE-MS and LC-MS data. Anal Bioanal Chem 2023:10.1007/s00216-023-04715-6. [PMID: 37225900 DOI: 10.1007/s00216-023-04715-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 04/16/2023] [Accepted: 04/20/2023] [Indexed: 05/26/2023]
Abstract
In mass spectrometry (MS)-based metabolomics, there is a great need to combine different analytical separation techniques to cover metabolites of different polarities and apply appropriate multi-platform data processing. Here, we introduce AriumMS (augmented region of interest for untargeted metabolomics mass spectrometry) as a reliable toolbox for multi-platform metabolomics. AriumMS offers augmented data analysis of several separation techniques utilizing a region-of-interest algorithm. To demonstrate the capabilities of AriumMS, five datasets were combined. This includes three newly developed capillary electrophoresis (CE)-Orbitrap MS methods using the recently introduced nanoCEasy CE-MS interface and two hydrophilic interaction liquid chromatography (HILIC)-Orbitrap MS methods. AriumMS provides a novel mid-level data fusion approach for multi-platform data analysis to simplify and speed up multi-platform data processing and evaluation. The key feature of AriumMS lies in the optimized data processing strategy, including parallel processing of datasets and flexible parameterization for processing of individual separation methods with different peak characteristics. As a case study, Saccharomyces cerevisiae (yeast) was treated with a growth inhibitor, and AriumMS successfully differentiated the metabolome based on the augmented multi-platform CE-MS and HILIC-MS investigation. As a result, AriumMS is proposed as a powerful tool to improve the accuracy and selectivity of metabolome analysis through the integration of several HILIC-MS/CE-MS techniques.
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Affiliation(s)
- Lukas Naumann
- Department of Chemistry, Aalen University, Beethovenstraße 1, 73430, Aalen, Germany
| | - Adrian Haun
- Department of Chemistry, Aalen University, Beethovenstraße 1, 73430, Aalen, Germany
| | - Alisa Höchsmann
- Department of Chemistry, Aalen University, Beethovenstraße 1, 73430, Aalen, Germany
| | - Michael Mohr
- Department of Chemistry, Aalen University, Beethovenstraße 1, 73430, Aalen, Germany
| | - Martin Novák
- Department of Chemistry, Aalen University, Beethovenstraße 1, 73430, Aalen, Germany
| | - Dirk Flottmann
- Department of Chemistry, Aalen University, Beethovenstraße 1, 73430, Aalen, Germany
| | - Christian Neusüß
- Department of Chemistry, Aalen University, Beethovenstraße 1, 73430, Aalen, Germany.
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7
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Qubaiová J, Jakubec P, Montoya-Molina S, Novák M, Šuláková H. The Impact of Diet and Photoperiodism on the Life History of Thanatophilus sinuatus (Coleoptera: Silphidae). J Med Entomol 2023; 60:453-459. [PMID: 36779808 DOI: 10.1093/jme/tjad012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Indexed: 05/13/2023]
Abstract
The forensically important genus Thanatophilus Leach, 1815 (Coleoptera: Silphidae) is a widespread group of carrion beetles that occupies the Holarctic and Afrotropical realms. It has recently received more recognition, as its species are frequently detected on large carrion, including humans, and can be useful in estimating the time of colonization (TOC) and the post-mortem interval (PMI). The immature stages of Thanatophilus sinuatus (Fabricius, 1775) were reared on three different meat diets (pork liver, pork muscle, and chicken muscle). Diet influence on some of the essential life history traits of the species was examined for different populations. Our findings indicated an accelerated development on pork muscle followed closely by pork liver and a prolonged development on chicken muscle. The diet significantly affected the size, and the body condition (weight/ size) as both pork muscle and liver produced individuals in better physical condition (larger and heavier). The impact of two cyclic photoperiod regimes (16 h Light (L): 8 h Dark (D) and 12 h L: 12 h D) was further evaluated and indicated no significant variability.
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Affiliation(s)
- J Qubaiová
- Department of Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, CZ-165 00 Praha - Suchdol, Czech Republic
| | - P Jakubec
- Department of Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, CZ-165 00 Praha - Suchdol, Czech Republic
| | - S Montoya-Molina
- Department of Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, CZ-165 00 Praha - Suchdol, Czech Republic
| | - M Novák
- Department of Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, CZ-165 00 Praha - Suchdol, Czech Republic
| | - H Šuláková
- Department of Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, CZ-165 00 Praha - Suchdol, Czech Republic
- Police of the Czech Republic, Institute of Criminalistics Prague, P.O. Box 62/KUP, CZ-170 89 Praha, Czech Republic
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Hůnová I, Novák M, Kurfürst P, Škáchová H, Štěpánová M, Přechová E, Veselovský F, Čuřík J, Bohdálková L, Komárek A. Comparison of vertical and horizontal atmospheric deposition of nitrate at Central European mountain-top sites during three consecutive winters. Sci Total Environ 2023; 869:161697. [PMID: 36690116 DOI: 10.1016/j.scitotenv.2023.161697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 01/13/2023] [Accepted: 01/15/2023] [Indexed: 06/17/2023]
Abstract
Nitrogen (N) deposition, a key process of atmospheric self-cleaning, represents an important pathway for nutrients and pollutants to ecosystems. Enhanced N deposition flux contributes to acidification, eutrophication and loss of biodiversity. N-NO3- concentrations in rime and snow were measured at 10 Czech plots situated in borderline mountains in 2009-2011 winters. The results were put in context with data-driven geostatistical modelling results of annual wet vertical and horizontal deposition. Our hypotheses were that: (i) rime and snow would be more polluted in the highly industrialized north than in the south, (ii) the N-NO3- concentrations would differ in the three winters studied, and (iii), that N-NO3- rime deposition is not negligible in Central European mountain ranges. Our results indicated that winter N-NO3- concentrations were significantly higher in rime than in snow and that there were much larger between-site differences in N-NO3- concentrations for rime than for snow. Relatively large differences were found between individual years. Atmospheric input of N-NO3- in winter was dominated by vertical deposition, i.e., snow. Modelled results showed that mean winter rime deposition corresponded to about 6-25 %, and mean winter snow deposition made up 25-72.5 % of mean annual N-NO3- wet-only deposition. Model N-NO3-occult deposition estimated from throughfall and total (wet and dry) deposition is highly uncertain, however: N throughfall is not a relevant proxy for estimation of realistic total N deposition due to N exchange between the tree canopy and atmosphere.
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Affiliation(s)
- Iva Hůnová
- Czech Hydrometeorological Institute, Na Šabatce 17, 143 06 Prague 4, Komořany, Czech Republic.
| | - Martin Novák
- Czech Geological Survey, Department of Environmental Geochemistry and Biogeochemistry, Geologicka 6, 152 00 Prague 5, Czech Republic
| | - Pavel Kurfürst
- Czech Hydrometeorological Institute, Na Šabatce 17, 143 06 Prague 4, Komořany, Czech Republic
| | - Hana Škáchová
- Czech Hydrometeorological Institute, Na Šabatce 17, 143 06 Prague 4, Komořany, Czech Republic
| | - Markéta Štěpánová
- Czech Geological Survey, Department of Environmental Geochemistry and Biogeochemistry, Geologicka 6, 152 00 Prague 5, Czech Republic
| | - Eva Přechová
- Czech Geological Survey, Department of Environmental Geochemistry and Biogeochemistry, Geologicka 6, 152 00 Prague 5, Czech Republic
| | - František Veselovský
- Czech Geological Survey, Department of Rock Geochemistry, Geologická 6, 152 00 Prague 5, Czech Republic
| | - Jan Čuřík
- Czech Geological Survey, Department of Environmental Geochemistry and Biogeochemistry, Geologicka 6, 152 00 Prague 5, Czech Republic
| | - Leona Bohdálková
- Czech Geological Survey, Department of Environmental Geochemistry and Biogeochemistry, Geologicka 6, 152 00 Prague 5, Czech Republic
| | - Arnošt Komárek
- Faculty of Mathematics and Physics, Charles University, Sokolovská 83, 186 75 Prague 8, Czech Republic
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Petrash DA, Krám P, Pérez-Rivera KX, Bůzek F, Čuřík J, Veselovský F, Novák M. Soil solution data from Bohemian headwater catchments record atmospheric metal deposition and legacy pollution. Environ Sci Pollut Res Int 2023; 30:48232-48247. [PMID: 36752921 PMCID: PMC10097769 DOI: 10.1007/s11356-023-25673-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Accepted: 01/28/2023] [Indexed: 06/18/2023]
Abstract
Soil solution chemistry depends largely on mineralogy and organic matter properties of soil horizons with which they interact. Differing lithologies within a given catchment area can influence variability in soil cation exchange capacities and affect solute transport. Zero-tension and tension lysimeters were used to evaluate the fast transport of solutes in the topsoil vs. slow diffusional matrix flow at the subsoil of three contrasting lithology catchments in a mid-elevation mountain forest. Our aim was to test the feasibility of lysimeters' hydrochemical data as a gauge for legacy subsoil pollution. Due to contrasting lithologies, atmospheric legacy pollution prevailing at the soil-regolith interface is differently yet consistently reflected by beryllium, lead, and chromium soil solution concentrations of the three catchments. Geochemical (dis)equilibrium between the soil and soil matrix water governed the hydrochemistry of the soil solutions at the time of collection, potentially contributing to decreased dissolved concentrations with increased depths at sites with higher soil pH. A complementary isotopic δ18O runoff generation model constrained potential seasonal responses and pointed to sufficiently long water-regolith interactions as to permit important seasonal contributions of groundwater enriched in chemical species to the topsoil levels. Our study also reflects subsoil equilibration with atmospheric solutes deposited at the topsoil and thus provides guidance for evaluating legacy pollution in soil profiles derived from contrasting lithology.
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Affiliation(s)
- Daniel A Petrash
- Department of Environmental Geochemistry and Biogeochemistry, Czech Geological Survey, Geologická 6, 152 00, Prague 5, Czechia.
- Institute of Soil Biology and Biogeochemistry, Biology Centre of the Czech Academy of Sciences, Na Sádkách 7, 37005, České Budějovice, Czechia.
| | - Pavel Krám
- Department of Environmental Geochemistry and Biogeochemistry, Czech Geological Survey, Geologická 6, 152 00, Prague 5, Czechia
| | - Katherine X Pérez-Rivera
- Department of Environmental Geochemistry and Biogeochemistry, Czech Geological Survey, Geologická 6, 152 00, Prague 5, Czechia
- Department of Biological Sciences, Virginia Tech, 926 West Campus Drive, Blacksburg, VA, 24061, USA
| | - František Bůzek
- Department of Environmental Geochemistry and Biogeochemistry, Czech Geological Survey, Geologická 6, 152 00, Prague 5, Czechia
| | - Jan Čuřík
- Department of Environmental Geochemistry and Biogeochemistry, Czech Geological Survey, Geologická 6, 152 00, Prague 5, Czechia
| | - Frantisek Veselovský
- Department of Environmental Geochemistry and Biogeochemistry, Czech Geological Survey, Geologická 6, 152 00, Prague 5, Czechia
| | - Martin Novák
- Department of Environmental Geochemistry and Biogeochemistry, Czech Geological Survey, Geologická 6, 152 00, Prague 5, Czechia
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10
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Bouz G, Šlechta P, Jand'ourek O, Konečná K, Paterová P, Bárta P, Novák M, Kučera R, Dal NJK, Fenaroli F, Zemanová J, Forbak M, Korduláková J, Pavliš O, Kubíčková P, Doležal M, Zitko J. Hybridization Approach Toward Novel Antituberculars: Design, Synthesis, and Biological Evaluation of Compounds Combining Pyrazinamide and 4-Aminosalicylic Acid. ACS Infect Dis 2023; 9:79-96. [PMID: 36577009 DOI: 10.1021/acsinfecdis.2c00433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Apart from the SARS-CoV-2 virus, tuberculosis remains the leading cause of death from a single infectious agent according to the World Health Organization. As part of our long-term research, we prepared a series of hybrid compounds combining pyrazinamide, a first-line antitubercular agent, and 4-aminosalicylic acid (PAS), a second-line agent. Compound 11 was found to be the most potent, with a broad spectrum of antimycobacterial activity and selectivity toward mycobacterial strains over other pathogens. It also retained its in vitro activity against multiple-drug-resistant mycobacterial strains. Several structural modifications were attempted to improve the in vitro antimycobacterial activity. The δ-lactone form of compound 11 (11') had more potent in vitro antimycobacterial activity against Mycobacterium tuberculosis H37Rv. Compound 11 was advanced for in vivo studies, where it was proved to be nontoxic in Galleria mellonella and zebrafish models, and it reduced the number of colony-forming units in spleens in the murine model of tuberculosis. Biochemical studies showed that compound 11 targets mycobacterial dihydrofolate reductases (DHFR). An in silico docking study combined with molecular dynamics identified a viable binding mode of compound 11 in mycobacterial DHFR. The lactone 11' opens in human plasma to its parent compound 11 (t1/2 = 21.4 min). Compound 11 was metabolized by human liver fraction by slow hydrolysis of the amidic bond (t1/2 = 187 min) to yield PAS and its starting 6-chloropyrazinoic acid. The long t1/2 of compound 11 overcomes the main drawback of PAS (short t1/2 necessitating frequent administration of high doses of PAS).
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Affiliation(s)
- Ghada Bouz
- Faculty of Pharmacy in Hradec Králové, Charles University, Heyrovského 1203, Hradec Králové 500 05, Czech Republic
| | - Petr Šlechta
- Faculty of Pharmacy in Hradec Králové, Charles University, Heyrovského 1203, Hradec Králové 500 05, Czech Republic
| | - Ondřej Jand'ourek
- Faculty of Pharmacy in Hradec Králové, Charles University, Heyrovského 1203, Hradec Králové 500 05, Czech Republic
| | - Klára Konečná
- Faculty of Pharmacy in Hradec Králové, Charles University, Heyrovského 1203, Hradec Králové 500 05, Czech Republic
| | - Pavla Paterová
- Department of Clinical Microbiology, University Hospital, Sokolská 581, Hradec Králové 500 05, Czech Republic
| | - Pavel Bárta
- Faculty of Pharmacy in Hradec Králové, Charles University, Heyrovského 1203, Hradec Králové 500 05, Czech Republic
| | - Martin Novák
- Faculty of Pharmacy in Hradec Králové, Charles University, Heyrovského 1203, Hradec Králové 500 05, Czech Republic.,Biomedical Research Center, University Hospital Hradec Kralove, Sokolská 581, Hradec Králové 500 05, Czech Republic
| | - Radim Kučera
- Faculty of Pharmacy in Hradec Králové, Charles University, Heyrovského 1203, Hradec Králové 500 05, Czech Republic
| | | | - Federico Fenaroli
- Department of Biosciences, University of Oslo, Blindernveien 31, Oslo 0371, Norway
| | - Júlia Zemanová
- Department of Biochemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynská Dolina, Ilkovičova 6, Bratislava 84215, Slovakia
| | - Martin Forbak
- Department of Biochemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynská Dolina, Ilkovičova 6, Bratislava 84215, Slovakia
| | - Jana Korduláková
- Department of Biochemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynská Dolina, Ilkovičova 6, Bratislava 84215, Slovakia
| | - Oto Pavliš
- Military Health Institute, Military Medical Agency, Tychonova 1, Prague 6 160 01, Czech Republic
| | - Pavla Kubíčková
- Military Health Institute, Military Medical Agency, Tychonova 1, Prague 6 160 01, Czech Republic
| | - Martin Doležal
- Faculty of Pharmacy in Hradec Králové, Charles University, Heyrovského 1203, Hradec Králové 500 05, Czech Republic
| | - Jan Zitko
- Faculty of Pharmacy in Hradec Králové, Charles University, Heyrovského 1203, Hradec Králové 500 05, Czech Republic
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11
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Pačes T, Krachler M, Novák M, Štěpánová M, Bohdálková L, Přechová E. Atmospheric deposition and trajectories of antimony in Central Europe. Environ Pollut 2023; 316:120518. [PMID: 36341823 DOI: 10.1016/j.envpol.2022.120518] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Revised: 10/20/2022] [Accepted: 10/21/2022] [Indexed: 06/16/2023]
Abstract
Antimony (Sb) concentrations were measured in wet atmospheric deposition at 10 high-elevation sites in the Czech Republic (Central Europe) during three winter seasons (2009-2011). Soluble and insoluble Sb forms were quantified in snow (vertical deposition) and rime (horizontal deposition) on mountain summits located equidistantly near the Czech borders with Austria, Germany and Poland. The highest Sb concentrations were found in the soluble form in rime (0.47 μg L-1), while the lowest Sb concentrations were those in the insoluble form in snow (0.017 μg L-1). The estimated average Sb deposition rate in Central Europe amounted to 1.3. 10-4 g m-2 yr-1. Most Sb was deposited in the soluble form in snow (7.9. 10-5 g m-2 yr-1), followed by the soluble form in rime (3.5. 10-5 g m-2 yr-1). The corresponding insoluble fraction contained less Sb, namely 1.2. 10-5 g m-2 yr-1 in snow and 2.3. 10-6 g m-2 yr-1 in rime. The average Sb deposition in Central Europe, measured at an altitude of 1000 m a.s.l., was by six orders of magnitude higher compared to Sb deposition in the Arctic (7. 10-10 g m-2 yr-1), and by four orders of magnitude lower compared to Sb deposition in a Sb-Hg mining district in China (7 g m-2 yr-1). Using the HYSPLIT model, backward trajectories of air masses indicated that the Sb sources were predominantly situated in Upper and Lower Silesia.
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Affiliation(s)
- Tomas Pačes
- Czech Geological Survey, Geologicka 6, 152 00 Prague 5, Czech Republic.
| | | | - Martin Novák
- Czech Geological Survey, Geologicka 6, 152 00 Prague 5, Czech Republic
| | - Markéta Štěpánová
- Czech Geological Survey, Geologicka 6, 152 00 Prague 5, Czech Republic
| | - Leona Bohdálková
- Czech Geological Survey, Geologicka 6, 152 00 Prague 5, Czech Republic; Global Change Research Institute of the Czech Academy of Sciences, Belidla 986/4a, 603 00 Brno, Czech Republic
| | - Eva Přechová
- Czech Geological Survey, Geologicka 6, 152 00 Prague 5, Czech Republic
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12
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Qubaiová J, Jakubec P, Montoya-Molina S, Novák M, Šuláková H. Diet Impact on the Development and Survival of Oiceoptoma thoracicum (Coleoptera: Silphidae). J Med Entomol 2022; 59:1905-1910. [PMID: 36073525 PMCID: PMC9667723 DOI: 10.1093/jme/tjac129] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Indexed: 05/26/2023]
Abstract
We assessed the influence of diet on the development and survival in the immature stages of the necrophagous beetle Oiceoptoma thoracicum (Linnaeus, 1758). The species is frequently observed on large cadavers, including humans, and thus can be of potential forensic relevance. We compared multiple meat tissues from three animal sources, and detected the optimal diet for rearing the species for further entomological and forensic objectives. We reared 203 individuals to adulthood at the constant temperature of 20°C. Our results represent the first robust data set of the development time for this species. They further confirmed a significant relationship between survival and the type of diet, as the highest survival rates were detected in larvae fed with both pork liver and pork muscle.
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Affiliation(s)
- Jarin Qubaiová
- Department of Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, CZ-165 00 Praha, Suchdol, Czech Republic
| | | | - Santiago Montoya-Molina
- Department of Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, CZ-165 00 Praha, Suchdol, Czech Republic
| | - Martin Novák
- Department of Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, CZ-165 00 Praha, Suchdol, Czech Republic
| | - Hana Šuláková
- Department of Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, CZ-165 00 Praha, Suchdol, Czech Republic
- Police of the Czech Republic, Institute of Criminalistics Prague, P.O. Box 62/KUP, CZ-170 89 Praha, Czech Republic
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13
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Novák M, Gloor C, Wicki E, Herb D, Schibli A, Richner G. Assessment of a novel, easy-to-implement, aerosolized H 2O 2 decontamination method for single-use filtering facepiece respirators in case of shortage. J Occup Environ Hyg 2022; 19:663-675. [PMID: 36107018 DOI: 10.1080/15459624.2022.2125519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The COVID-19 pandemic has affected the world and caused a supply shortage of personal protection equipment, especially filtering facepiece respirators (FFP). This has increased the risk of many healthcare workers contracting SARS-CoV-2. Various strategies have been assessed to tackle these supply issues. In critical shortage scenarios, reusing single-use-designed respirators may be required. Thus, an easily applicable and reliable FFP2 (or alike) respirator decontamination method, allowing safe re-use of FFP2 respirators by healthcare personnel, has been developed and is presented in this study. A potent and gentle aerosolized hydrogen peroxide (12% wt) method was applied over 4 hr to decontaminate various brands of FFP2 respirators within a small common room, followed by adequate aeration and storage overnight. The microbial efficacy was tested on unused respirator pieces using spores of Geobacillus stearothermophilus. Further, decontamination effectiveness was tested on used respirators after one 12-hr shift by swabbing before and after the decontamination. The effects of up to ten decontamination cycles on the respirators' functionality were evaluated using material properties, the structural integrity of the respirators, and fit tests with subjects. The suggested H2O2 decontamination procedure was proven to be (a) sufficiently potent (no microbial recovery, total inactivation of biological indicators as well as spore inoculum on critical respirator surfaces), (b) gentle as no significant damage to the respirator structural integrity and acceptable fit factors were observed, and (c) safe as no H2O2 residue were detected after the defined aeration and storage. Thus, this easy-to-implement and scalable method could overcome another severe respirator shortage, providing enough flexibility to draft safe, effective, and logistically simple crisis plans. However, as highlighted in this study, due to the wealth of design and material used in different models and brands of respirators, the decontamination process should be validated for each FFP respirator model before its field implementation.
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Affiliation(s)
- Martin Novák
- Research and Strategic Business Development, SKAN AG, Allschwil, Switzerland
| | - Christian Gloor
- Federal Office for Civil Protection, Spiez Laboratory, Spiez, Switzerland
| | - Esther Wicki
- Division of Infectious Diseases and Hospital Epidemiology, Zurich City Hospital, Zurich, Switzerland
| | - Dorothea Herb
- Division of Infectious Diseases and Hospital Epidemiology, Zurich City Hospital, Zurich, Switzerland
| | - Adrian Schibli
- Division of Infectious Diseases and Hospital Epidemiology, Zurich City Hospital, Zurich, Switzerland
| | - Gilles Richner
- Federal Office for Civil Protection, Spiez Laboratory, Spiez, Switzerland
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14
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Bokányi E, Novák M, Jakobi Á, Lengyel B. Urban hierarchy and spatial diffusion over the innovation life cycle. R Soc Open Sci 2022; 9:211038. [PMID: 35592759 PMCID: PMC9066303 DOI: 10.1098/rsos.211038] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Accepted: 03/31/2022] [Indexed: 05/03/2023]
Abstract
Successful innovations achieve large geographical coverage by spreading across settlements and distances. For decades, spatial diffusion has been argued to take place along the urban hierarchy. Yet, the role of geographical distance was difficult to identify in hierarchical diffusion due to missing data on spreading events. In this paper, we exploit spatial patterns of individual invitations sent from registered users to new users over the entire life cycle of a social media platform. We demonstrate that hierarchical diffusion overlaps with diffusion to close distances and these factors co-evolve over the life cycle. Therefore, we disentangle them in a regression framework that estimates the yearly number of invitations sent between pairs of towns. We confirm that hierarchical diffusion prevails initially across large towns only but emerges in the full spectrum of settlements in the middle of the life cycle when adoption accelerates. Unlike in previous gravity estimations, we find that after an intensifying role of distance in the middle of the life cycle a surprisingly weak distance effect characterizes the last years of diffusion. Our results stress the dominance of urban hierarchy in spatial diffusion and inform future predictions of innovation adoption at local scales.
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Affiliation(s)
- Eszter Bokányi
- ELKH Centre for Economic and Regional Studies, Agglomeration and Social Networks Lendület Research Group, Budapest 1097, Hungary
- Corvinus University of Budapest, Laboratory for Networks, Technology and Innovation, Budapest 1093, Hungary
| | - Martin Novák
- ELKH Centre for Economic and Regional Studies, Agglomeration and Social Networks Lendület Research Group, Budapest 1097, Hungary
- ELKH Wigner Research Centre for Physics, Budapest 1121, Hungary
| | - Ákos Jakobi
- Department for Regional Science, Eötvös Loránd University, Budapest 1117, Hungary
- ELKH Research Centre for Astronomy and Earth Sciences, Spatial Big Data Lab, Budapest 1121, Hungary
| | - Balázs Lengyel
- ELKH Centre for Economic and Regional Studies, Agglomeration and Social Networks Lendület Research Group, Budapest 1097, Hungary
- Corvinus University of Budapest, Laboratory for Networks, Technology and Innovation, Budapest 1093, Hungary
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15
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Qubaiová J, Jakubec P, Montoya-Molina S, Novák M, Šuláková H. Influence of Diet on Development and Survival of Thanatophilus rugosus (Coleoptera: Silphidae). J Med Entomol 2021; 58:2124-2129. [PMID: 34426839 DOI: 10.1093/jme/tjab141] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Indexed: 06/13/2023]
Abstract
This study examined the effects of various diets on the development time and survival of the carrion beetle Thanatophilus rugosus (Fabricius, 1775). We attempted to find the best diet for rearing the species in laboratory conditions for entomological research and forensic purposes, and to further understand its feeding habits. The larval stages were monitored while feeding on three types of meat under a constant temperature. We discovered that the shortest development time in total was achieved in larvae fed with pork liver, followed closely by pork muscle. The longest development and lowest survival rates were observed when introducing a chicken diet. We were also able to identify specific stages during which the diet significantly affected the development.
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Affiliation(s)
- Jarin Qubaiová
- Department of Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, CZ-165 00 Praha - Suchdol, Czech Republic
| | - Pavel Jakubec
- Department of Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, CZ-165 00 Praha - Suchdol, Czech Republic
| | - Santiago Montoya-Molina
- Department of Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, CZ-165 00 Praha - Suchdol, Czech Republic
| | - Martin Novák
- Department of Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, CZ-165 00 Praha - Suchdol, Czech Republic
| | - Hana Šuláková
- Department of Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, CZ-165 00 Praha - Suchdol, Czech Republic
- Police of the Czech Republic, Institute of Criminalistics Prague, CZ-170 89 Praha, Czech Republic
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16
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Montoya-Molina S, Jakubec P, Qubaiová J, Novák M, Šuláková H, Růžička J. Developmental Models of the Forensically Important Carrion Beetle, Thanatophilus sinuatus (Coleoptera: Silphidae). J Med Entomol 2021; 58:1041-1047. [PMID: 33200199 DOI: 10.1093/jme/tjaa255] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Indexed: 06/11/2023]
Abstract
Carrion beetles of genus Thanatophilus (Leach, 1815) are an important group of necrophagous insects, with great potential for forensic entomology in temperate zones of Africa, America, Asia, and Europe. Developmental models for majority of Thanatophilus species remain unknown. In this study, we will provide new thermal summation models for all the developmental stages of Thanatophilus sinuatus (Fabricius, 1775), one of the most abundant and widespread species of the genus. The beetles were bred at seven different constant temperatures, and developmental time was measured for each developmental stage (egg, three larval instars, postfeeding stage, and pupa). Temperature-sex influence was tested, and thermal summation constants were calculated to be used for postmortem interval estimation during criminal investigations.
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Affiliation(s)
- Santiago Montoya-Molina
- Department of Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká, Praha - Suchdol, Czech Republic
| | - Pavel Jakubec
- Department of Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká, Praha - Suchdol, Czech Republic
| | - Jarin Qubaiová
- Department of Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká, Praha - Suchdol, Czech Republic
| | - Martin Novák
- Department of Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká, Praha - Suchdol, Czech Republic
| | - Hana Šuláková
- Department of Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká, Praha - Suchdol, Czech Republic
- Police of the Czech Republic, Institute of Criminalistics Prague, Praha, Czech Republic
| | - Jan Růžička
- Department of Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká, Praha - Suchdol, Czech Republic
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17
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Náprstková N, Novák M, Marek M, Šramhauser K, Sviantek J, Stančeková D, Ťavodová M. Analyses of Influence on Chromium Coating after Grinding from the View of Final Microstructure and Microhardness in the Surface Layer. Materials (Basel) 2021; 14:ma14092396. [PMID: 34064512 PMCID: PMC8125006 DOI: 10.3390/ma14092396] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Revised: 04/26/2021] [Accepted: 04/29/2021] [Indexed: 11/30/2022]
Abstract
The article deals with the analysis of chromium layer grinding on a steel substrate, where this issue was addressed with regard to the requirements of the manufacturing sector, specifically in the aerospace industry. The experimental samples were chromium-plated and ground under different cutting conditions by the grooving method of grinding. Two types of grinding wheels for grinding were used, grinding wheel based on SG (solgel) a grinding wheel based on SiC. The resulting microstructure and microhardness in the machined layer were evaluated with using of confocal laser microscopy, inverted materials microscopy, and hardness testing. Based on the results, recommendations were made regarding a suitable approach to grinding the chromium coating. We used a confocal laser microscope and hardness tester for the evaluation of presented values. It was found that, on the base of analyses values, with both grinding wheel and using cutting conditions used, good results have been achieved. This could be stated, because the analysis of the samples microstructure after grinding for the given cutting conditions showed that it is possible that a small influence is completely acceptable from the point of the final product view and there are no major negative phenomena. Measurements of surface microhardness after grinding showed similar results for all samples. The SiC-based grinding wheel showed slightly better results, but both grinding wheels can be used without problems for the presented cutting conditions, and the presented cutting conditions with both grinding wheels can be recommended for the grinding of the given material.
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Affiliation(s)
- Nataša Náprstková
- Faculty of Mechanical Engineering, Jan Evangelista Purkyně University in Ústí nad Labem, Pasteurova 7, 40096 Ústí nad Labem, Czech Republic; (M.N.); (K.Š.); (J.S.)
- Correspondence: ; Tel.: +420-475-285-513
| | - Martin Novák
- Faculty of Mechanical Engineering, Jan Evangelista Purkyně University in Ústí nad Labem, Pasteurova 7, 40096 Ústí nad Labem, Czech Republic; (M.N.); (K.Š.); (J.S.)
| | - Martin Marek
- Solar Turbines AEME Ltd., 43108 Bitozeves, Czech Republic;
| | - Karel Šramhauser
- Faculty of Mechanical Engineering, Jan Evangelista Purkyně University in Ústí nad Labem, Pasteurova 7, 40096 Ústí nad Labem, Czech Republic; (M.N.); (K.Š.); (J.S.)
| | - Jan Sviantek
- Faculty of Mechanical Engineering, Jan Evangelista Purkyně University in Ústí nad Labem, Pasteurova 7, 40096 Ústí nad Labem, Czech Republic; (M.N.); (K.Š.); (J.S.)
| | - Dana Stančeková
- Faculty of Mechanical Engineering, University of Zilina, Univerzitná 8215/1, 01026 Žilina, Slovakia;
| | - Miroslava Ťavodová
- Faculty of Technology, Technical University in Zvolen, Študentská 26, 96001 Zvolen, Slovakia;
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Kovács KD, Novák M, Hajnal Z, Hős C, Szabó B, Székács I, Fang Y, Bonyár A, Horvath R. Label-free tracking of whole-cell response on RGD functionalized surfaces to varied flow velocities generated by fluidic rotation. J Colloid Interface Sci 2021; 599:620-630. [PMID: 33984760 DOI: 10.1016/j.jcis.2021.04.091] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 04/11/2021] [Accepted: 04/18/2021] [Indexed: 10/21/2022]
Abstract
Fluidic flow plays important roles in colloid and interface sciences. Measuring adsorption, aggregation processes and living cell behavior under a fluidic environment with varied flow velocities in a parallel and high-throughput manner remains to be a challenging task. Here a method is introduced to monitor cell response to well-defined flow with varied velocities over an array of label-free resonant waveguide grating (RWG) based optical biosensors. The arrangement consists of a circular well with an array of biosensors at the bottom surface. By rotating the liquid over the biosensor array using a magnetic stirrer bar, flow velocities from zero to a predefined maximum can be easily established over different locations within the biosensor array as characterized in detail by numerical simulations. Cell adhesion and detachment measurements on an Arg-Gly-Asp (RGD) peptide functionalized surface were performed to demonstrate i) measurements at a wide range of simultaneous flow velocities over the same interface; ii) the possibility of parallel measurements at the same flow conditions in one run; and iii) the simple tuning of the employed range of flow velocities. Our setup made it possible to analyze the magnitude and rate of cell detachment at various flow velocities in parallel and determine the critical velocity and force where cells start to detach from the RGD motif displaying biomimetic surface. Furthermore, cellular response to simultaneous mechanical (flow) and chemical stimulation was also investigated using trypsin as a model. This study opens a new possibility to investigate interface phenomena under predefined and conveniently varied flow conditions.
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Affiliation(s)
- Kinga Dóra Kovács
- Nanobiosensorics Laboratory, ELKH EK MFA, Budapest, Hungary; Department of Biological Physics, Eötvös University, Budapest, Hungary
| | - Martin Novák
- Nanobiosensorics Laboratory, ELKH EK MFA, Budapest, Hungary
| | - Zoltán Hajnal
- Microsystems Laboratory, ELKH EK MFA, Budapest, Hungary
| | - Csaba Hős
- Department of Hydrodynamic Systems, Budapest University of Technology and Economics, Budapest, Hungary
| | - Bálint Szabó
- Department of Biological Physics, Eötvös University, Budapest, Hungary
| | - Inna Székács
- Nanobiosensorics Laboratory, ELKH EK MFA, Budapest, Hungary
| | - Ye Fang
- EIG New Programs, Corning Research and Development Corporation, Corning Incorporated, NY, USA
| | - Attila Bonyár
- Department of Electronics Technology, Faculty of Electrical Engineering and Informatics, Budapest University of Technology and Economics, Budapest, Hungary.
| | - Robert Horvath
- Nanobiosensorics Laboratory, ELKH EK MFA, Budapest, Hungary.
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Petrash DA, Novák M, Bohdálková L, Krachler M, Čuřík J, Veselovský F, Štěpánová M, Umbría-Salinas K, Přechová E, Komárek A. Winter arsenic pollution in 10 forest ecosystems in the mountainous border regions of the Czech Republic. Environ Sci Pollut Res Int 2021; 28:16107-16121. [PMID: 33247400 DOI: 10.1007/s11356-020-11738-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Accepted: 11/17/2020] [Indexed: 06/12/2023]
Abstract
Arsenic (As) concentrations and deposition fluxes were measured in snow and rime at 10 mountain-top sites near the borders between the Czech Republic and Austria, Germany, Poland, and Slovakia during three consecutive winter seasons (2009-2011). Our study was performed at a time following several decades of sharply decreasing regional atmospheric pollution and following the 2006 implementation of stricter air quality standards across Europe. Our objective was to compare vertical and horizontal depositions of soluble and insoluble As forms throughout the Czech Republic and define a recent Central European As pollution gradient. Arsenic soluble in weak nitric acid contributed 83 to 85% to the total As deposition, with the remaining 17-15% bound to stable particulate forms. The highest As deposition rates were recorded in the eastern Czech Republic near the borders with Poland and Slovakia. Complementary hydrochemical monitoring in four mountain-slope catchments situated near selected main study sites revealed a further decrease in open-area As deposition by the end of 2018 in the east of the country. In contrast, spruce canopy throughfall flux did not change significantly between 2009-2011 and 2016-2018. The site-specific relative roles of coal-burning-derived and ore-smelting-derived atmospheric As are discussed.
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Affiliation(s)
- Daniel A Petrash
- Department of Environmental Geochemistry and Biogeochemistry, Czech Geological Survey, Geologicka 6, 152 00, Prague 5, Czech Republic.
- Soil and Water Research Infrastrucutre, Biology Centre, Czech Academy of Sciences, Ceske Budejovice, Czech Republic.
| | - Martin Novák
- Department of Environmental Geochemistry and Biogeochemistry, Czech Geological Survey, Geologicka 6, 152 00, Prague 5, Czech Republic
| | - Leona Bohdálková
- Department of Environmental Geochemistry and Biogeochemistry, Czech Geological Survey, Geologicka 6, 152 00, Prague 5, Czech Republic
| | - Micheal Krachler
- European Commission, Joint Research Centre Karlsruhe, P.O. Box 2340, 76125, Karlsruhe, Germany
| | - Jan Čuřík
- Department of Environmental Geochemistry and Biogeochemistry, Czech Geological Survey, Geologicka 6, 152 00, Prague 5, Czech Republic
| | - František Veselovský
- Department of Environmental Geochemistry and Biogeochemistry, Czech Geological Survey, Geologicka 6, 152 00, Prague 5, Czech Republic
| | - Markéta Štěpánová
- Department of Environmental Geochemistry and Biogeochemistry, Czech Geological Survey, Geologicka 6, 152 00, Prague 5, Czech Republic
| | - Karelys Umbría-Salinas
- Soil and Water Research Infrastrucutre, Biology Centre, Czech Academy of Sciences, Ceske Budejovice, Czech Republic
| | - Eva Přechová
- Department of Environmental Geochemistry and Biogeochemistry, Czech Geological Survey, Geologicka 6, 152 00, Prague 5, Czech Republic
| | - Arnost Komárek
- Faculty of Mathematics and Physics, Charles University, Sokolovska 49, 186 75, Prague 8, Czech Republic
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Jakubec P, Qubaiová J, Novák M, Růžička J. Developmental Biology of Forensically Important Beetle, Necrophila (Calosilpha) brunnicollis (Coleoptera: Silphidae). J Med Entomol 2021; 58:64-70. [PMID: 32829403 DOI: 10.1093/jme/tjaa170] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Indexed: 06/11/2023]
Abstract
The postmortem interval (PMI) estimation, in cases where the body was discovered in an advanced stage of decomposition, is predominantly based on entomological evidence. However, very few forensically important species are sufficiently known in detail to allow a practical application. One of them is the carrion beetle, Necrophila (Calosilpha) brunnicollis (Kraatz, 1877). Its development from egg to adulthood was studied under a range of ecologically relevant constant temperatures to find parameters of thermal summation models. Developmental sexual dimorphism and the presence of developmental rate isomorphy were investigated. Herein we present the lower developmental thresholds and sum of effective temperatures for all developmental stages of N. brunnicollis (egg, first-third larval instar, postfeeding stage, and pupae). We did not find any evidence of developmental sexual dimorphism nor was the presence of developmental rate isomorphy confirmed. Our results present the first thermal summation model of the East Asian carrion beetle that can be used for the PMI estimation.
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Affiliation(s)
- Pavel Jakubec
- Department of Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká, Praha, Suchdol, Czech Republic
| | - Jarin Qubaiová
- Department of Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká, Praha, Suchdol, Czech Republic
| | - Martin Novák
- Department of Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká, Praha, Suchdol, Czech Republic
| | - Jan Růžička
- Department of Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká, Praha, Suchdol, Czech Republic
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21
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Bohdálková L, Novák M, Krachler M, Míková J, Chrastný V, Veselovský F, Voldřichová P, Pacherová P, Komárek A, Přechová E. Cadmium contents of vertically and horizontally deposited winter precipitation in Central Europe: Spatial distribution and long-term trends. Environ Pollut 2020; 265:114949. [PMID: 32563118 DOI: 10.1016/j.envpol.2020.114949] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 05/28/2020] [Accepted: 06/02/2020] [Indexed: 06/11/2023]
Abstract
Cadmium (Cd) and its forms has recently been a focus of attention due to its toxic effects on human health and the environment. We evaluated the atmospheric deposition of Cd during three consecutive winter seasons (2009-2011) at 10 mountain-top locations in the Czech Republic along the borders with Poland, Germany, Austria and Slovakia. Cadmium concentrations of soluble and insoluble forms in both horizontal (rime) and vertical (snow) deposition were determined using sector-field ICP-MS. Across the sites, 94% of the total winter Cd deposition occurred in the soluble (environmentally available) Cd form. Mean concentrations of soluble Cd in rime were six times higher than in snow (398 vs. 66 ng L-1). Vertical deposition contributed as much as 41% to the total winter Cd input. Between-site variability in Cd deposition was large, ranging between 13 and 108 μg m-2 winter-1. Overall, Cd concentrations in winter deposition did not reach the drinking water limits and did not pose a direct threat for human health. Long-term trends (1996-2017) in winter Cd deposition were evaluated at six GEOMON sites (a monitoring network of small forested catchments). Since 1996, Cd input in winter atmospheric deposition decreased by 73-93%. Simultaneously, we found declines in between-site variability in winter Cd inputs. The highest recent winter Cd inputs were found at sites located in the northeast of the country. A north-south pollution gradient, which has frequently been mentioned in the literature, was not observed, with both northwestern sites and southern sites being among those with the lowest Cd pollution. Backward trajectories of the HYSPLIT model for fresh snow samples identified Poland and Germany as major transboundary Cd pollution sources for the Czech Republic.
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Affiliation(s)
- Leona Bohdálková
- Czech Geological Survey, Geologická 6, 152 00, Prague 5, Czech Republic; Global Change Research Institute of the Czech Academy of Sciences, Bělidla 986/4a, 603 00 Brno, Czech Republic.
| | - Martin Novák
- Czech Geological Survey, Geologická 6, 152 00, Prague 5, Czech Republic
| | - Michael Krachler
- European Commission, Joint Research Centre, P.O. Box 2340, D-76125, Karlsruhe, Germany
| | - Jitka Míková
- Czech Geological Survey, Geologická 6, 152 00, Prague 5, Czech Republic
| | - Vladislav Chrastný
- Faculty of Environmental Sciences, Czech University of Life Sciences, Kamýcká 129, 165 00 Prague-Suchdol, Czech Republic
| | | | - Petra Voldřichová
- Czech Geological Survey, Geologická 6, 152 00, Prague 5, Czech Republic
| | - Petra Pacherová
- Czech Geological Survey, Geologická 6, 152 00, Prague 5, Czech Republic
| | - Arnošt Komárek
- Faculty of Mathematics and Physics, Charles University, Sokolovská 83, 186 75, Prague 8, Czech Republic
| | - Eva Přechová
- Czech Geological Survey, Geologická 6, 152 00, Prague 5, Czech Republic
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22
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Montesdeoca-Esponda S, Torres-Padrón ME, Novák M, Krchová L, Sosa-Ferrera Z, Santana-Rodríguez JJ. Occurrence of benzotriazole UV stabilizers in coastal fishes. J Environ Manage 2020; 269:110805. [PMID: 32561012 DOI: 10.1016/j.jenvman.2020.110805] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Revised: 05/13/2020] [Accepted: 05/19/2020] [Indexed: 06/11/2023]
Abstract
Chemicals added in personal care products are of emerging concern because their fate and their effect on the environment is not completely known. Benzotriazole UV stabilizers (BUVSs) are compounds used in different cosmetic products, which may reach the marine environment through marine discharge from treated waters or directly from bathing areas. Once released into the aquatic ecosystem, BUVSs can be bioaccumulated by aquatic organisms. To identify the human exposure risk, it is important to have suitable analytical methods to determine the presence of BUVSs in these organisms. Because of the complexity of such a biological matrix, selective extraction and detection techniques are required to isolate and quantify these kinds of pollutants at trace levels. In the present work, we optimized a method based on microwave-assisted extraction combined with ultra-high performance liquid chromatography and mass spectrometry detection to determine six benzotriazole compounds in fish samples. The absolute extraction yields provided by the proposed method were higher than 40% for most compounds, with intra-day and inter-day relative standard deviations ranging from 0.27 to 6.06 and 1.12-21.3%, respectively. The limits of quantification were in the range of 1.13-9.66 ng g-1 (dry weight). The method was applied to the study of three species of fish (Boops boops, Sphyraena viridensis, Sphoeroides marmoratus) that were collected close to three marine outfalls of treated waters on the Gran Canaria Island (Spain) for two years. Four of the six studied compounds, UV-326, UV-328, UV-329 and UV-360, were found with concentrations ranging from 1.34 ng g-1 to 45.6 ng g-1 (dry weight).
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Affiliation(s)
- Sarah Montesdeoca-Esponda
- Instituto Universitario de Estudios Ambientales y Recursos Naturales (i-UNAT), Universidad de Las Palmas de Gran Canaria, 35017, Las Palmas de Gran Canaria, Spain
| | - María Esther Torres-Padrón
- Instituto Universitario de Estudios Ambientales y Recursos Naturales (i-UNAT), Universidad de Las Palmas de Gran Canaria, 35017, Las Palmas de Gran Canaria, Spain
| | - Martin Novák
- Biomedical Research Centre, University Hospital Hradec Kralove, Sokolska 581, Hradec Kralove, Czech Republic; Department of Pharmaceutical Chemistry and Pharmaceutical Analysis, Faculty of Pharmacy in Hradec Kralove, Charles University, Heyrovskeho 1203, Hradec Kralove, Czech Republic
| | - Lucie Krchová
- Faculty of Pharmacy in Hradec Kralove, Charles University, Heyrovskeho 1203, Hradec Kralove, Czech Republic
| | - Zoraida Sosa-Ferrera
- Instituto Universitario de Estudios Ambientales y Recursos Naturales (i-UNAT), Universidad de Las Palmas de Gran Canaria, 35017, Las Palmas de Gran Canaria, Spain
| | - José Juan Santana-Rodríguez
- Instituto Universitario de Estudios Ambientales y Recursos Naturales (i-UNAT), Universidad de Las Palmas de Gran Canaria, 35017, Las Palmas de Gran Canaria, Spain.
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Lewis SM, Wong CH, Owens ACS, Fallon C, Jepsen S, Thancharoen A, Wu C, De Cock R, Novák M, López-Palafox T, Khoo V, Reed JM. Corrigendum: A Global Perspective on Firefly Extinction Threats. Bioscience 2020. [DOI: 10.1093/biosci/biaa026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Sara M Lewis
- Firefly Specialist Group of the International Union for the Conservation of Nature Species Survival Commission (IUCN SSC)
- Department of Biology, Tufts University
| | - Choong Hay Wong
- Firefly Specialist Group of the International Union for the Conservation of Nature Species Survival Commission (IUCN SSC)
- Malaysia Nature Society, in Kuala Lumpur, Malaysia
| | - Avalon C S Owens
- Firefly Specialist Group of the International Union for the Conservation of Nature Species Survival Commission (IUCN SSC)
- Department of Biology, Tufts University
| | - Candace Fallon
- Firefly Specialist Group of the International Union for the Conservation of Nature Species Survival Commission (IUCN SSC)
- The Xerces Society for Invertebrate Conservation, Portland, Oregon
| | - Sarina Jepsen
- Firefly Specialist Group of the International Union for the Conservation of Nature Species Survival Commission (IUCN SSC)
- The Xerces Society for Invertebrate Conservation, Portland, Oregon
| | - Anchana Thancharoen
- Firefly Specialist Group of the International Union for the Conservation of Nature Species Survival Commission (IUCN SSC)
- Department of Entomology, Faculty of Agriculture, Kasetsart University, in Bangkok, Thailand
| | - Chiahsiung Wu
- Firefly Specialist Group of the International Union for the Conservation of Nature Species Survival Commission (IUCN SSC)
- Huafan University, in Taipei City, Taiwan
| | - Raphael De Cock
- Firefly Specialist Group of the International Union for the Conservation of Nature Species Survival Commission (IUCN SSC)
- Department of Biology's Evolutionary Ecology Research Group, University of Antwerp, Belgium
| | - Martin Novák
- Firefly Specialist Group of the International Union for the Conservation of Nature Species Survival Commission (IUCN SSC)
- Department of Ecology, Czech University of Life Sciences, Prague, Czech Republic
| | - Tania López-Palafox
- Firefly Specialist Group of the International Union for the Conservation of Nature Species Survival Commission (IUCN SSC)
- Instituto de Ecología, Universidad Nacional Autónoma de México, México City, México
| | - Veronica Khoo
- Firefly Specialist Group of the International Union for the Conservation of Nature Species Survival Commission (IUCN SSC)
- Forest Biodiversity Division of the Forest Research Institute Malaysia, Selangor, Malaysia
| | - J Michael Reed
- Firefly Specialist Group of the International Union for the Conservation of Nature Species Survival Commission (IUCN SSC)
- Department of Biology, Tufts University
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Lewis SM, Wong CH, Owens ACS, Fallon C, Jepsen S, Thancharoen A, Wu C, De Cock R, Novák M, López-Palafox T, Khoo V, Reed JM. A Global Perspective on Firefly Extinction Threats. Bioscience 2020. [DOI: 10.1093/biosci/biz157] [Citation(s) in RCA: 55] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Insect declines and their drivers have attracted considerable recent attention. Fireflies and glowworms are iconic insects whose conspicuous bioluminescent courtship displays carry unique cultural significance, giving them economic value as ecotourist attractions. Despite evidence of declines, a comprehensive review of the conservation status and threats facing the approximately 2000 firefly species worldwide is lacking. We conducted a survey of experts from diverse geographic regions to identify the most prominent perceived threats to firefly population and species persistence. Habitat loss, light pollution, and pesticide use were regarded as the most serious threats, although rankings differed substantially across regions. Our survey results accompany a comprehensive review of current evidence concerning the impact of these stressors on firefly populations. We also discuss risk factors likely to increase the vulnerability of certain species to particular threats. Finally, we highlight the need to establish monitoring programs to track long-term population trends for at-risk firefly taxa.
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Affiliation(s)
| | | | | | - Candace Fallon
- The Xerces Society for Invertebrate Conservation, Portland, Oregon
| | - Sarina Jepsen
- The Xerces Society for Invertebrate Conservation, Portland, Oregon
| | - Anchana Thancharoen
- Department of Entomology, Faculty of Agriculture, Kasetsart University, Bangkok, Thailand
| | | | - Raphael De Cock
- Department of Biology's Evolutionary Ecology Research Group, University of Antwerp, Belgium
| | - Martin Novák
- Department of Ecology, Czech University of Life Sciences, Prague, Czech Republic
| | - Tania López-Palafox
- Instituto de Ecología, Universidad Nacional Autónoma de México, México City, México
| | - Veronica Khoo
- Forest Biodiversity Division of the Forest Research Institute Malaysia, Selangor, Malaysia
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Doležal R, Houdková I, Kalász H, Andrýs R, Novák M, Maltsevskaya NV, Karásková N, Kolář K, Novotná E, Kuča K, Žďárová Karasová J. Determination of Hypericin in Hypericum perforatum (St. John’s Wort) Using Classical C18 and Pentafluorophenyl Stationary Phases: Contribution of Pi–Pi Interactions to High-Performance Liquid Chromatography (HPLC). ANAL LETT 2019. [DOI: 10.1080/00032719.2019.1571076] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Rafael Doležal
- Biomedical Research Center, University Hospital Hradec Kralove, Hradec Kralove, Czech Republic
- Department of Chemistry Faculty of Sciences, University of Hradec Kralove, Hradec Kralove, Czech Republic
- Center for Basic and Applied Research, Faculty of Informatics and Management, University of Hradec Kralove, Hradec Kralove, Czech Republic
| | - Iva Houdková
- Department of Chemistry Faculty of Sciences, University of Hradec Kralove, Hradec Kralove, Czech Republic
| | - Huba Kalász
- Department of Pharmacology and Pharmacotherapy, Semmelweis University, Budapest, Hungary
| | - Rudolf Andrýs
- Department of Chemistry Faculty of Sciences, University of Hradec Kralove, Hradec Kralove, Czech Republic
| | - Martin Novák
- Biomedical Research Center, University Hospital Hradec Kralove, Hradec Kralove, Czech Republic
| | | | - Natálie Karásková
- Department of Chemistry Faculty of Sciences, University of Hradec Kralove, Hradec Kralove, Czech Republic
| | - Karel Kolář
- Department of Chemistry Faculty of Sciences, University of Hradec Kralove, Hradec Kralove, Czech Republic
| | - Eva Novotná
- Department of Biochemical Sciences, Faculty of Pharmacy in Hradec Kralove, Charles University, Hradec Kralove, Czech Republic
| | - Kamil Kuča
- Biomedical Research Center, University Hospital Hradec Kralove, Hradec Kralove, Czech Republic
- Department of Chemistry Faculty of Sciences, University of Hradec Kralove, Hradec Kralove, Czech Republic
| | - Jana Žďárová Karasová
- Biomedical Research Center, University Hospital Hradec Kralove, Hradec Kralove, Czech Republic
- Department of Toxicology and Military Pharmacy Faculty of Military Health Sciences, Hradec Kralove, University of Defense, Brno, Czech Republic
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26
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Tatarková M, Baška T, Sovičová M, Kuka S, Štefanová E, Novák M, Váňová B, Hudečková H. Lead contamination of fruit spirits intended for own consumption as a potential overlooked public health issue? A pilot study. Cent Eur J Public Health 2019; 27:110-114. [PMID: 31241285 DOI: 10.21101/cejph.a5524] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Accepted: 04/24/2019] [Indexed: 11/15/2022]
Abstract
OBJECTIVE The aim of the study was to analyse the occurrence of lead in selected samples of fruit distilled spirits for own consumptions in terms of possible contribution to the occurrence of alcohol-attributable diseases. METHODS In a pilot study, we analysed 18 samples of fruit spirits for own consumption. Most of the samples were distilled in the local growing distilleries in the Žilina Region with exception of 3 samples collected in the Trnava Region (one of them was of Hungarian origin). Sample preparation included previous mineralization with use of microwave decomposition system Multiwave 60 50 Hz. The samples were analysed by atomic absorption spectroscopy with graphic furnace (AAS GBC XplorAA 5000 with GF 5000). RESULTS The average ethanol level in our samples was higher in comparison with distributed spirits. We detected lead in all samples. In two of them the concentration was lower than the limit of quantitation (LOQ). The highest lead concentrations were observed in plum spirit from Hungary (581.0 μg/l), and in grape spirit made in the Trnava Region (466.3 μg/l). CONCLUSIONS Lead is a widespread contaminant of fruit spirits prepared for own consumption. Taking into consideration its common occurrence and possible multiplicative effect with ethanol, we can assume that lead can contribute to the occurrence of several alcohol-attributable chronic diseases. Due to the insufficient information in this field, our results provide significant insight into the issue and present an important starting point for further research.
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Affiliation(s)
- Mária Tatarková
- Department of Public Health, Jessenius Faculty of Medicine in Martin, Comenius University, Martin, Slovak Republic
| | - Tibor Baška
- Department of Public Health, Jessenius Faculty of Medicine in Martin, Comenius University, Martin, Slovak Republic
| | - Miroslava Sovičová
- Department of Public Health, Jessenius Faculty of Medicine in Martin, Comenius University, Martin, Slovak Republic
| | - Stanislav Kuka
- Department of Public Health, Jessenius Faculty of Medicine in Martin, Comenius University, Martin, Slovak Republic
| | - Eliška Štefanová
- Department of Public Health, Jessenius Faculty of Medicine in Martin, Comenius University, Martin, Slovak Republic
| | - Martin Novák
- Department of Public Health, Jessenius Faculty of Medicine in Martin, Comenius University, Martin, Slovak Republic
| | - Barbora Váňová
- Department of Molecular Biology, Jessenius Faculty of Medicine in Martin, Comenius University, Martin, Slovak Republic
| | - Henrieta Hudečková
- Department of Public Health, Jessenius Faculty of Medicine in Martin, Comenius University, Martin, Slovak Republic
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27
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Barna D, Novák M, Brunner K, Kirby G, Goddard B, Borburgh J, Atanasov MG, Sanz Ull A, Renner E, Bartmann W, Szakály M. Conceptual design of a high-field septum magnet using a superconducting shield and a canted-cosine-theta magnet. Rev Sci Instrum 2019; 90:053302. [PMID: 31153287 DOI: 10.1063/1.5096020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Accepted: 04/17/2019] [Indexed: 06/09/2023]
Abstract
A zero-field cooled superconducting shield was previously proposed to realize a high-field (at least 3 T) septum magnet for the Future Circular Collider proton-proton ring. In this paper, we present the conceptual design of a complete septum magnet prototype including a shield with an optimized shape and a simple and cost-effective superconducting magnet using the canted cosine theta concept. 2D optimization of the coil geometry and a realistic 2D simulation of the fieldmap and field homogeneity are presented taking into account the nonlinear penetration of the magnetic field into the shield.
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Affiliation(s)
- Dániel Barna
- Wigner Research Centre for Physics, Institute for Particle and Nuclear Physics, Konkoly-Thege M. 29-33, H-1121 Budapest, Hungary
| | - Martin Novák
- Wigner Research Centre for Physics, Institute for Particle and Nuclear Physics, Konkoly-Thege M. 29-33, H-1121 Budapest, Hungary
| | - Kristóf Brunner
- CERN, TE-VSC-VSM, Esplanade des Particules 1, 1217 Meyrin, Switzerland
| | - Glyn Kirby
- CERN, TE-MSC-MDT, Esplanade des Particules 1, 1217 Meyrin, Switzerland
| | - Brennan Goddard
- CERN, TE-ABT, Esplanade des Particules 1, 1217 Meyrin, Switzerland
| | - Jan Borburgh
- CERN, TE-ABT-SE, Esplanade des Particules 1, 1217 Meyrin, Switzerland
| | | | | | - Elisabeth Renner
- CERN, TE-ABT-BTP, Esplanade des Particules 1, 1217 Meyrin, Switzerland
| | - Wolfgang Bartmann
- CERN, TE-ABT-BTP, Esplanade des Particules 1, 1217 Meyrin, Switzerland
| | - Marcell Szakály
- Department of Physics, University of Oxford, Oxford OX1 3PU, United Kingdom
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Jakubec P, Novák M, Qubaiová J, Šuláková H, Růžička J. Description of immature stages of Thanatophilus sinuatus (Coleoptera: Silphidae). Int J Legal Med 2019; 133:1549-1565. [DOI: 10.1007/s00414-019-02040-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Accepted: 03/06/2019] [Indexed: 10/27/2022]
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Faber J, Novák M, Kovaljov M, Chalupová R, Bouchner P. Dynamics of sinusoidal alpha waves asymmetry in brain electrical field. NEURAL NETW WORLD 2019. [DOI: 10.14311/nnw.2019.29.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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30
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Jakubec P, Novák M, Qubaiová J. Chroma+, a new automontage method of image background selection for Insects and other structurally complex objects. Zookeys 2018:67-76. [PMID: 30429658 PMCID: PMC6232239 DOI: 10.3897/zookeys.795.26870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Accepted: 09/10/2018] [Indexed: 11/29/2022] Open
Abstract
Obtaining taxonomic-grade images is a vital part of probably every present-day morphological study of insects, even though the task itself is perceived as a “necessary evil” due to high investment of both time and effort to produce representable images. Cleaning the background and making it appear as a solid color of known properties is probably one of the most time-demanding tasks. Several techniques have been developed to reduce the time requirement; the most convenient and cost-effective one presumably being the chroma isolation. This method uses a green background that can be isolated and conveniently replaced with another picture or solid color, as used in the film industry. However, the main drawback of this technique is spilling of color onto the object, which is unavoidable and can be corrected only by sacrificing the true color of the object to some extent. Our improved Chroma+ method is based on classical chroma isolation workflow and helps to overcome this problem by taking an additional image of the object with a neutral color background and applying a selection obtained from the chroma-isolated picture on it. This technique is, in terms of the resulting image quality, superior to classical chroma isolation, while the time difference between these two methods is negligible. Furthermore, it does not require any additional equipment (hardware or software), thus being accessible to both employed taxonomists, low budget laboratories, and enthusiasts.
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Affiliation(s)
- Pavel Jakubec
- Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, Praha - Suchdol, 165 00, Czech Republic Czech University of Life Sciences Prague Prague Czech Republic
| | - Martin Novák
- Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, Praha - Suchdol, 165 00, Czech Republic Czech University of Life Sciences Prague Prague Czech Republic
| | - Jarin Qubaiová
- Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, Praha - Suchdol, 165 00, Czech Republic Czech University of Life Sciences Prague Prague Czech Republic
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31
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Jurček O, Valkenier H, Puttreddy R, Novák M, Sparkes HA, Marek R, Rissanen K, Davis AP. Anion Recognition by a Bioactive Diureidodecalin Anionophore: Solid-State, Solution, and Computational Studies. Chemistry 2018; 24:8178-8185. [PMID: 29603485 PMCID: PMC6055605 DOI: 10.1002/chem.201800537] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Revised: 03/26/2018] [Indexed: 12/31/2022]
Abstract
Recent work has identified a bis-(p-nitrophenyl)ureidodecalin anion carrier as a promising candidate for biomedical applications, showing good activity for chloride transport in cells yet almost no cytotoxicity. To underpin further development of this and related compounds, a detailed structural and binding investigation is reported. Crystal structures of the transporter as five solvates confirm the diaxial positioning of urea groups while revealing a degree of conformational flexibility. Structures of complexes with Cl- , Br- , NO3- , SO42- and AcO- , supported by computational studies, show how the binding site can adapt to accommodate these anions. 1 H NMR binding studies revealed exceptionally high affinities for anions in DMSO, decreasing in the order SO42- >H2 PO4- ≈HCO3- ≈AcO- ≫HSO4- >Cl- >Br- >NO3- >I- . Analysis of the binding results suggests that selectivity is determined mainly by the H-bond acceptor strength of different anions, but is also modulated by receptor geometry.
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Affiliation(s)
- Ondřej Jurček
- Department of ChemistryUniversity of JyvaskylaP.O. Box 3540014JyväskyläFinland
- School of ChemistryUniversity of BristolCantock's CloseBristolBS8 1TSUK
- CEITEC—Central European Institute of TechnologyMasaryk UniversityKamenice 5/A4BrnoCzech Republic
| | - Hennie Valkenier
- School of ChemistryUniversity of BristolCantock's CloseBristolBS8 1TSUK
- Engineering of Molecular NanoSystems, Ecole Polytechnique de BruxellesUniversité Libre de BruxellesAvenue F.D. Roosevelt 50, CP165/641050BrusselsBelgium
| | - Rakesh Puttreddy
- Department of ChemistryUniversity of JyvaskylaP.O. Box 3540014JyväskyläFinland
| | - Martin Novák
- CEITEC—Central European Institute of TechnologyMasaryk UniversityKamenice 5/A4BrnoCzech Republic
| | - Hazel A. Sparkes
- School of ChemistryUniversity of BristolCantock's CloseBristolBS8 1TSUK
| | - Radek Marek
- CEITEC—Central European Institute of TechnologyMasaryk UniversityKamenice 5/A4BrnoCzech Republic
- Department of Chemistry, Faculty of ScienceMasaryk UniversityKamenice 5/A4625 00BrnoCzech Republic
| | - Kari Rissanen
- Department of ChemistryUniversity of JyvaskylaP.O. Box 3540014JyväskyläFinland
| | - Anthony P. Davis
- School of ChemistryUniversity of BristolCantock's CloseBristolBS8 1TSUK
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Doležal R, Karásková N, Musil K, Novák M, Maltsevskaya NV, Maliňák D, Kolář K, Soukup O, Kuča K, Žďárová Karasová J. Characterization of the Penetration of the Blood–Brain Barrier by High-Performance Liquid Chromatography (HPLC) Using a Stationary Phase with an Immobilized Artificial Membrane. ANAL LETT 2018. [DOI: 10.1080/00032719.2018.1424175] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- Rafael Doležal
- Department of Chemistry, Faculty of Sciences, University of Hradec Kralove, Hradec Kralove, Czech Republic
- Biomedical Research Center, University Hospital Hradec Kralove, Hradec Kralove, Czech Republic
- Center for Basic and Applied Research, Faculty of Informatics and Management, University of Hradec Kralove, Hradec Kralove, Czech Republic
| | - Natálie Karásková
- Department of Chemistry, Faculty of Sciences, University of Hradec Kralove, Hradec Kralove, Czech Republic
| | - Karel Musil
- Biomedical Research Center, University Hospital Hradec Kralove, Hradec Kralove, Czech Republic
| | - Martin Novák
- Biomedical Research Center, University Hospital Hradec Kralove, Hradec Kralove, Czech Republic
| | | | - Dávid Maliňák
- Department of Chemistry, Faculty of Sciences, University of Hradec Kralove, Hradec Kralove, Czech Republic
- Biomedical Research Center, University Hospital Hradec Kralove, Hradec Kralove, Czech Republic
| | - Karel Kolář
- Department of Chemistry, Faculty of Sciences, University of Hradec Kralove, Hradec Kralove, Czech Republic
- Department of Chemistry and Chemical Education, Faculty of Education, Charles University, Prague, Czech Republic
| | - Ondřej Soukup
- Biomedical Research Center, University Hospital Hradec Kralove, Hradec Kralove, Czech Republic
- Department of Toxicology and Military Pharmacy, Faculty of Military Health Sciences, University of Defense, Hradec Kralove, Brno, Czech Republic
| | - Kamil Kuča
- Department of Chemistry, Faculty of Sciences, University of Hradec Kralove, Hradec Kralove, Czech Republic
- Biomedical Research Center, University Hospital Hradec Kralove, Hradec Kralove, Czech Republic
- Center for Basic and Applied Research, Faculty of Informatics and Management, University of Hradec Kralove, Hradec Kralove, Czech Republic
| | - Jana Žďárová Karasová
- Biomedical Research Center, University Hospital Hradec Kralove, Hradec Kralove, Czech Republic
- Department of Toxicology and Military Pharmacy, Faculty of Military Health Sciences, University of Defense, Hradec Kralove, Brno, Czech Republic
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Chyba J, Novák M, Munzarová P, Novotný J, Marek R. Through-Space Paramagnetic NMR Effects in Host–Guest Complexes: Potential Ruthenium(III) Metallodrugs with Macrocyclic Carriers. Inorg Chem 2018; 57:8735-8747. [DOI: 10.1021/acs.inorgchem.7b03233] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Novák M, Jakubec P, Qubaiová J, Šuláková H, Růžička J. Revisited larval morphology of Thanatophilus rugosus (Coleoptera: Silphidae). Int J Legal Med 2017; 132:939-954. [DOI: 10.1007/s00414-017-1764-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Accepted: 12/12/2017] [Indexed: 10/18/2022]
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Gregor A, Filová E, Novák M, Kronek J, Chlup H, Buzgo M, Blahnová V, Lukášová V, Bartoš M, Nečas A, Hošek J. Designing of PLA scaffolds for bone tissue replacement fabricated by ordinary commercial 3D printer. J Biol Eng 2017; 11:31. [PMID: 29046717 PMCID: PMC5641988 DOI: 10.1186/s13036-017-0074-3] [Citation(s) in RCA: 155] [Impact Index Per Article: 22.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Accepted: 08/01/2017] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The primary objective of Tissue engineering is a regeneration or replacement of tissues or organs damaged by disease, injury, or congenital anomalies. At present, Tissue engineering repairs damaged tissues and organs with artificial supporting structures called scaffolds. These are used for attachment and subsequent growth of appropriate cells. During the cell growth gradual biodegradation of the scaffold occurs and the final product is a new tissue with the desired shape and properties. In recent years, research workplaces are focused on developing scaffold by bio-fabrication techniques to achieve fast, precise and cheap automatic manufacturing of these structures. Most promising techniques seem to be Rapid prototyping due to its high level of precision and controlling. However, this technique is still to solve various issues before it is easily used for scaffold fabrication. In this article we tested printing of clinically applicable scaffolds with use of commercially available devices and materials. Research presented in this article is in general focused on "scaffolding" on a field of bone tissue replacement. RESULTS Commercially available 3D printer and Polylactic acid were used to create originally designed and possibly suitable scaffold structures for bone tissue engineering. We tested printing of scaffolds with different geometrical structures. Based on the osteosarcoma cells proliferation experiment and mechanical testing of designed scaffold samples, it will be stated that it is likely not necessary to keep the recommended porosity of the scaffold for bone tissue replacement at about 90%, and it will also be clarified why this fact eliminates mechanical properties issue. Moreover, it is demonstrated that the size of an individual pore could be double the size of the recommended range between 0.2-0.35 mm without affecting the cell proliferation. CONCLUSION Rapid prototyping technique based on Fused deposition modelling was used for the fabrication of designed scaffold structures. All the experiments were performed in order to show how to possibly solve certain limitations and issues that are currently reported by research workplaces on the field of scaffold bio-fabrication. These results should provide new valuable knowledge for further research.
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Affiliation(s)
- Aleš Gregor
- Department of Instrumentation and Control Engineering, Faculty of Mechanical Engineering, Czech Technical University in Prague, Technická 4, 166 07 Prague 6, Czechia
| | - Eva Filová
- Institute of Experimental Medicine of the Czech Academy of Sciences, Vídeňská 1083, 14220 Prague 4, Czechia
- Second Faculty of Medicine, Charles University, V Úvalu 84, 150 06 Prague 6, Czechia
| | - Martin Novák
- Department of Instrumentation and Control Engineering, Faculty of Mechanical Engineering, Czech Technical University in Prague, Technická 4, 166 07 Prague 6, Czechia
| | - Jakub Kronek
- Department of Mechanics, Biomechanics and Mechatronics, Faculty of Mechanical Engineering, Czech Technical University in Prague, Technická 4, 166 07 Prague 6, Czechia
| | - Hynek Chlup
- Department of Mechanics, Biomechanics and Mechatronics, Faculty of Mechanical Engineering, Czech Technical University in Prague, Technická 4, 166 07 Prague 6, Czechia
| | - Matěj Buzgo
- University Centre for Energy Efficient Buildings, Třinecká 1024, 273 43 Buštěhrad, Czechia
| | - Veronika Blahnová
- Institute of Experimental Medicine of the Czech Academy of Sciences, Vídeňská 1083, 14220 Prague 4, Czechia
- Second Faculty of Medicine, Charles University, V Úvalu 84, 150 06 Prague 6, Czechia
| | - Věra Lukášová
- Institute of Experimental Medicine of the Czech Academy of Sciences, Vídeňská 1083, 14220 Prague 4, Czechia
- Faculty of Science, Charles University, Albertov 6, 12843 Prague 2, Czechia
| | - Martin Bartoš
- Department of Stomatology, First Faculty of Medicine, Charles University and General University Hospital in Prague, Kateřinská 32, 12801 Prague 2, Czechia
| | - Alois Nečas
- University of Veterinary and Pharmaceutical Sciencies Brno, Palackého tř. 1946/1, 612 42 Brno, Czechia
| | - Jan Hošek
- Department of Instrumentation and Control Engineering, Faculty of Mechanical Engineering, Czech Technical University in Prague, Technická 4, 166 07 Prague 6, Czechia
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Affiliation(s)
- Martin Novák
- CEITEC-Central European Institute of Technology; Masaryk University; Kamenice 5 62500 Brno Czech Republic
| | - Radek Marek
- CEITEC-Central European Institute of Technology; Masaryk University; Kamenice 5 62500 Brno Czech Republic
- Department of Chemistry, Faculty of Science; Masaryk University; Kamenice 5 62500 Brno Czech Republic
| | - Cina Foroutan-Nejad
- CEITEC-Central European Institute of Technology; Masaryk University; Kamenice 5 62500 Brno Czech Republic
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Bora PL, Novák M, Novotný J, Foroutan-Nejad C, Marek R. Supramolecular Covalence in Bifurcated Chalcogen Bonding. Chemistry 2017; 23:7315-7323. [DOI: 10.1002/chem.201700179] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Indexed: 12/13/2022]
Affiliation(s)
- Pankaj Lochan Bora
- CEITEC-Central European Institute of Technology; Masaryk University; Kamenice 5 62500 Brno Czech Republic
- Department of Chemistry; Faculty of Science; Masaryk University; Kamenice 5 62500 Brno Czech Republic
| | - Martin Novák
- CEITEC-Central European Institute of Technology; Masaryk University; Kamenice 5 62500 Brno Czech Republic
- National Center for Biomolecular Research; Faculty of Science; Masaryk University; Kamenice 5 62500 Brno Czech Republic
| | - Jan Novotný
- CEITEC-Central European Institute of Technology; Masaryk University; Kamenice 5 62500 Brno Czech Republic
| | - Cina Foroutan-Nejad
- CEITEC-Central European Institute of Technology; Masaryk University; Kamenice 5 62500 Brno Czech Republic
| | - Radek Marek
- CEITEC-Central European Institute of Technology; Masaryk University; Kamenice 5 62500 Brno Czech Republic
- Department of Chemistry; Faculty of Science; Masaryk University; Kamenice 5 62500 Brno Czech Republic
- National Center for Biomolecular Research; Faculty of Science; Masaryk University; Kamenice 5 62500 Brno Czech Republic
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Šídlo L, Novák M, Štych P, Burcin B. [Assessing health care accessibility in the Czech republic]. Cas Lek Cesk 2017; 156:43-50. [PMID: 28264581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The article looks at the accessibility of health care in the Czech republic in relation to the relevant legislation. Health care access is a frequently debated issue, but quantifying it is a difficult task. There are no official regulations in our country for determining the capacity of health care workers by category and type of health care provision that could be used to ensure health care is accessible to the inhabitants of a given region. Nonetheless, a government regulation came into force in 2013 regulating local health care access and travel time. This regulation is the first of its kind in the Czech rep., but (perhaps because of this) it contains a number of ambiguities, and this lack of detail makes it impossible to ensure the regulation is fully implemented and adhered to.The aim of this article is to attempt to identify these ambiguities and to broadly pinpoint the main factors potentially affecting health care access. To achieve this, an analysis is performed on the data on health care providers and methods using advanced GIS (geographic information systems) are utilized. Given the wide range of health care services on offer, the examples relate to primary health care, specifically practical medicine for children and adolescents.
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Crha K, Novák M, Lenz J. [Carcinoid of the appendix during pregnancy]. Ceska Gynekol 2017; 82:126-128. [PMID: 28585845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
OBJECTIVE Early diagnosis of the appendiceal carcinoid during first trimester of pregnancy. DESIGN Case report. SETTING Department of Obstetrics and Gynaecology, Merciful Brothers Hospital, Brno. METHODS Own observation, review of literature. CONCLUSION In case of unclear clinical or intraoperative finding, the appendectomy may reveal a serious disease. Thorough examination of the appendix should be a part of every gynaecological operation.
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Novák M, Foroutan-Nejad C, Marek R. Modulating Electron Sharing in Ion-π-Receptors via Substitution and External Electric Field: A Route toward Bond Strengthening. J Chem Theory Comput 2016; 12:3788-95. [DOI: 10.1021/acs.jctc.6b00586] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Martin Novák
- CEITEC −
Central European Institute of Technology, Masaryk University, Kamenice 5/A4, CZ-625 00 Brno, Czech Republic
| | - Cina Foroutan-Nejad
- CEITEC −
Central European Institute of Technology, Masaryk University, Kamenice 5/A4, CZ-625 00 Brno, Czech Republic
| | - Radek Marek
- CEITEC −
Central European Institute of Technology, Masaryk University, Kamenice 5/A4, CZ-625 00 Brno, Czech Republic
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Novák M, Procházka V, Turcsányi P, Papajík T. Numbers of CD8+PD-1+ and CD4+PD-1+ Cells in Peripheral Blood of Patients with Chronic Lymphocytic Leukemia Are Independent of Binet Stage and Are Significantly Higher Compared to Healthy Volunteers. Acta Haematol 2016; 134:208-14. [PMID: 26066608 DOI: 10.1159/000381468] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2015] [Accepted: 03/06/2015] [Indexed: 11/19/2022]
Abstract
The programmed cell death pathway is involved in functional impairment of cytotoxic CD8+ T cells in chronic viral infection and in tumor immune evasion. The interaction of programmed cell death-1 (PD-1) with its ligand suppresses antitumor T cell function and stimulates the regulatory T cell population. The objectives were to investigate whether examining PD-1 expression in peripheral T cells of patients with chronic lymphocytic leukemia (CLL) reflected the disease phase and Binet stage and to compare the results with those in healthy volunteers. The study analyzed peripheral blood from previously untreated patients with CLL, patients with relapsed or refractory disease under treatment and healthy blood donors using flow cytometry. PD-1 expression in peripheral blood CD4+ and CD8+ cells was markedly different between disease stages and in comparison with healthy subjects. The highest numbers of both CD8+PD-1+ and CD4+PD-1+ cells were present in patients with relapsed/refractory disease. No distinct difference according to Binet stage was found. These facts support the hypothesis that tumor clones may switch effector CD8+ cells through the PD-1/PD-1L pathway into an immunotolerant state. The extent to which the mechanisms of antitumor immunity are influenced by enhanced expression of the programmed cell death depends on the disease phase but not Binet stage.
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Marín SDT, Novák M, Klančnik K, Gaberščik A. Spectral Signatures of Conifer Needles Mainly Depend on Their Physical Traits. Polish Journal of Ecology 2016. [DOI: 10.3161/15052249pje2016.64.1.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Abstract
Halogen bonding (XB) is being extensively explored for its potential use in advanced materials and drug design. Despite significant progress in describing this interaction by theoretical and experimental methods, the chemical nature remains somewhat elusive, and it seems to vary with the selected system. In this work we present a detailed DFT analysis of three-center asymmetric halogen bond (XB) formed between dihalogen molecules and variously 4-substituted 1,2-dimethoxybenzene. The energy decomposition, orbital, and electron density analyses suggest that the contribution of electrostatic stabilization is comparable with that of non-electrostatic factors. Both terms increase parallel with increasing negative charge of the electron donor molecule in our model systems. Depending on the orientation of the dihalogen molecules, this bifurcated interaction may be classified as 'σ-hole - lone pair' or 'σ-hole - π' halogen bonds. Arrangement of the XB investigated here deviates significantly from a recent IUPAC definition of XB and, in analogy to the hydrogen bonding, the term bifurcated halogen bond (BXB) seems to be appropriate for this type of interaction.
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Affiliation(s)
- Martin Novák
- CEITEC - Central European Institute of Technology, Masaryk University, Kamenice 5/A4, CZ-625 00 Brno, Czech Republic.
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Burget F, Foltán O, Kraus J, Kudrna K, Novák M, Ulrych J. [Influence of the Weather on the Incidence of Fractures in the Elderly]. Acta Chir Orthop Traumatol Cech 2016; 83:269-273. [PMID: 28026728] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
PURPOSE OF THE STUDY The incidence of geriatric fractures (proximal femur, distal radius, proximal humerus and thoracolumbar spine injuries) in the population increases with ageing. However, the role of weather conditions, such as icy and slippery winter, should not be overlooked. A deeper insight into this relationship may bring about a better understanding of the fracture aetiology and thus allow for improvement in the prevention of fractures in elderly people. MATERIAL AND METHODS This prospective study included 676 patients (469 women and 207 men) aged 65 and over. Relationships between the incidence of geriatric fractures in these patients and the season, weather phenomena (i.e., air temperature, atmospheric pressure, air humidity, wind speed, visibility, rain, snow, mist and storm) and global biometeorological data in the period from 1 January 2012 to 31 December 2013 were investigated. Patients with high velocity trauma or those with pathological fractures were excluded. Time (day/night), the place of injury (outdoor/indoor/home environment), comorbidities and chronicuse medication were also recorded. Weather forecast records with weather health loads (biotropic indices) were obtained from the commercial service Weather Underground and the Czech Hydrometeoro-logical Institute. The results were statistically analysed using the Statistika 12 programme. RESULTS The incidence of fractures was higher in winter months but there was no statistically significant correlation between the number of fractures and various weather characteristics (temperature, atmospheric pressure, air humidity, wind speed, visibility, rainfall, snow, mist or storm). On the other hand, a relationship between the incidence of geriatric fractures and the biometeorological data (biotropic index) for that day was significant (r = 0.65, p= 0.0401). The majority of fractures occurred during the daytime (83.7%) and in the indoor environment (83.1%); of the latter fractures, 85.2% were home injuries. The most frequent comorbidities included cardiovascular disease (36.2%), obesity (31.1%) and diabetes mellitus (25.4%). DISCUSSION Studies investigating seasonal patterns in relation to the incidence of geriatric fractures are contradictory. Sixteen previous studies have examined seasonal variations and the incidence of some types of geriatric fractures in different parts of the world. The majority of them have dealt with hip fractures, three with forearm injuries and one compared the incidence of hip, distal forearm, proximal humerus and ankle fractures in the four seasons of the year. Of 13 studies in geographic areas located north of 40°latitude, eight showed no seasonal variation in the incidence of fractures, four recorded an increase in the number of fractures in winter and two showed an increased number of fractures in summer. Three of them also studied the effect of daily temperature. Only one study paid attention to biometeorological data and related the biotropic index to the number of injuries treated at the emergency department. Three studies showed that fractures occurred most frequently in the home environment and during the daytime. CONCLUSIONS This study did not prove any statistically significant relationship between the incidence of geriatric fractures and different weather phenomena. Nevertheless, it showed a higher incidence of fractures in winter, from December to February. Most fractures occurred in indoor environments and during the day. A high value of the biotropic index was significantly related to the incidence of geriatric fractures. The most frequent comorbidities included cardiovascular disease, obesity and diabetes mellitus. Key words: geriatric fracture, season, weather, biometeorological forecast.
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Affiliation(s)
- F Burget
- I. chirurgická klinika 1. lékařské fakulty Univerzity Karlovy v Praze a Všeobecné fakultní nemocnice, Praha
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Novák M, Foroutan-Nejad C, Marek R. Solvent effects on ion–receptor interactions in the presence of an external electric field. Phys Chem Chem Phys 2016; 18:30754-30760. [DOI: 10.1039/c6cp05781k] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The solvation shells of different ions break at different electric field strengths.
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Affiliation(s)
- Martin Novák
- CEITEC – Central European Institute of Technology
- Masaryk University
- Brno
- Czech Republic
| | - Cina Foroutan-Nejad
- CEITEC – Central European Institute of Technology
- Masaryk University
- Brno
- Czech Republic
| | - Radek Marek
- CEITEC – Central European Institute of Technology
- Masaryk University
- Brno
- Czech Republic
- Department of Chemistry
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Hlinomaz O, Groch L, Sitar J, Rezek M, Seménka J, Novák M, Penkov N. New Imaging Methods of Coronary Arteries in Acute Coronary Syndromes. Journal Of Cardiovascular Emergencies 2015. [DOI: 10.1515/jce-2015-0008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
Coronary angiography is still the most widely used method for the assessment of lumen of coronary arteries and for diagnosis and treatment of coronary artery disease. New imaging modalities of coronary arteries play an increasing role in interventional cardiology. Intravascular ultrasound (IVUS) is the oldest technology, however due to its high tissue penetration remains very important for imaging of left main coronary artery and saphenous vein grafts. IVUS was used in many clinical trials and clinical experience with it is huge. Optical coherence tomography (OCT) is a new, very fast developing method. It has ten times higher axial resolution than IVUS. It gives us the opportunity to assess the inner structures of coronary artery wall, to evaluate the characteristics of atherosclerotic plaques, quality of stent implantation and its healing. It helps us to find the culprit lesion of acute coronary syndrome in some cases, to diagnose the cause of stent thrombosis, and to evaluate stent apposition which has a direct relation to prognosis. We use it to perform complex percutaneous coronary interventions and after heart transplantation to diagnose the vascular graft disease. We strongly believe that OCT is important for the assessment of plaque instability and patient´s prognosis. Near infrared spectroscopy combined with IVUS can distinguish fibrous from lipid core plaques. Lipid core burden index is in relation to a risk of periprocedural myocardial infarction and to prognosis. It is the only method which can sufficiently detect the amount of lipids in coronary wall.
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Affiliation(s)
- Ota Hlinomaz
- Department of Cardioangiology, ICRC, St. Anne University Hospital, Brno, Czech Republic
- SBALK Varna, Bulgarian Cardiac Institute, Bulgaria
| | - Ladislav Groch
- Department of Cardioangiology, ICRC, St. Anne University Hospital, Brno, Czech Republic
- SBALK Varna, Bulgarian Cardiac Institute, Bulgaria
| | - Jan Sitar
- Department of Cardioangiology, ICRC, St. Anne University Hospital, Brno, Czech Republic
- SBALK Varna, Bulgarian Cardiac Institute, Bulgaria
| | - Michal Rezek
- Department of Cardioangiology, ICRC, St. Anne University Hospital, Brno, Czech Republic
- SBALK Varna, Bulgarian Cardiac Institute, Bulgaria
| | - Jiří Seménka
- Department of Cardioangiology, ICRC, St. Anne University Hospital, Brno, Czech Republic
- SBALK Varna, Bulgarian Cardiac Institute, Bulgaria
| | - Martin Novák
- Department of Cardioangiology, ICRC, St. Anne University Hospital, Brno, Czech Republic
- SBALK Varna, Bulgarian Cardiac Institute, Bulgaria
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Abstract
Physiological function of a prion protein (PrP) is not known yet. Regarding the relation of PrP to heavy metals it is known that PrP is able to bind divalent ions of copper, zinc, manganese and nickel through its octarepeat region. It has been hypothesized but not yet confirmed that PrP could play a role in copper metabolism. In this study, cells expressing human full-length PrP (HuPrP1) and PrP-knockout (PrP0/0/1) cells were incubated with various concentrations of copper, zinc, manganese and nickel for 4 days and then were assayed for intracellular content of these metals and cell viability. The results showed that HuPrP1 cells accumulated less heavy metals than PrP0/0/1 cells when concentrations of heavy metals exceeded physiological level. In conclusion, HuPrP1 cells are more resistant to chronic overload with copper, manganese, zinc or nickel than PrP0/0/1 cells. The resistance to metals overload is caused solely by the presence of PrP, since HuPrP1 and PrP0/0/1 cells differ only in the expression of PrP. These results indicate that one of the functions of PrP can be the modulation of trace heavy metal concentrations in cells and protection of cells against heavy metals overload and subsequent oxidative stress.
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Faber E, Divoká M, Skoumalová I, Novák M, Marešová I, Mičová K, Friedecký D, Adam T, Jarošová M, Indrák K. A lower dosage of imatinib is sufficient to maintain undetectable disease in patients with chronic myeloid leukemia with long-term low-grade toxicity of the treatment. Leuk Lymphoma 2015; 57:370-375. [DOI: 10.3109/10428194.2015.1056184] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Prochazka M, Slavik L, Prochazkova J, Ulehlova J, Novák M, Polak P, Pilka R. C0322: The Role of Tissue Factor in Activation Coagulation System at Pregnancy Complications. Thromb Res 2014. [DOI: 10.1016/s0049-3848(14)50344-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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