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Lazarević LB, Knežević G, Purić D, Teovanović P, Petrović MB, Ninković M, Živanović M, Stanković S, Branković M, Lukić P, Opačić G, Žeželj I. Tracking variations in daily questionable health behaviors and their psychological roots: a preregistered experience sampling study. Sci Rep 2023; 13:14058. [PMID: 37640927 PMCID: PMC10462719 DOI: 10.1038/s41598-023-41243-w] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Accepted: 08/23/2023] [Indexed: 08/31/2023] Open
Abstract
People resort to various questionable health practices to preserve or regain health - they intentionally do not adhere to medical recommendations (e.g. self-medicate or modify the prescribed therapies; iNAR), or use traditional/complementary/alternative (TCAM) medicine. As retrospective reports overestimate adherence and suffer from recall and desirability bias, we tracked the variations in daily questionable health behaviors and compared them to their retrospectively reported lifetime use. We also preregistered and explored their relations to a wide set of psychological predictors - distal (personality traits and basic thinking dispositions) and proximal (different unfounded beliefs and biases grouped under the term irrational mindset). A community sample (N = 224) tracked daily engagement in iNAR and TCAM use for 14 days, resulting in 3136 data points. We observed a high rate of questionable health practices over the 14 days; daily engagement rates roughly corresponded to lifetime ones. Both iNAR and TCAM were weakly, but robustly positively related. Independent of the assessment method, an irrational mindset was the most important predictor of TCAM use. For iNAR, however, psychological predictors emerged as relevant only when assessed retrospectively. Our study offers insight into questionable health behaviors from both a within and between-person perspective and highlights the importance of their psychological roots.
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Affiliation(s)
- L B Lazarević
- Faculty of Philosophy, Institute of Psychology, University of Belgrade, Belgrade, Serbia
- Faculty of Philosophy, Laboratory for Research of Individual Differences, University of Belgrade, Belgrade, Serbia
| | - G Knežević
- Faculty of Philosophy, Laboratory for Research of Individual Differences, University of Belgrade, Belgrade, Serbia
- Faculty of Philosophy, Department of Psychology, University of Belgrade, Čika Ljubina 18-20, 11000, Belgrade, Serbia
| | - D Purić
- Faculty of Philosophy, Laboratory for Research of Individual Differences, University of Belgrade, Belgrade, Serbia
- Faculty of Philosophy, Department of Psychology, University of Belgrade, Čika Ljubina 18-20, 11000, Belgrade, Serbia
| | - P Teovanović
- Faculty of Philosophy, Laboratory for Research of Individual Differences, University of Belgrade, Belgrade, Serbia
- Faculty of Special Education and Rehabilitation, University of Belgrade, Belgrade, Serbia
| | - M B Petrović
- Faculty of Philosophy, Laboratory for Research of Individual Differences, University of Belgrade, Belgrade, Serbia
- Faculty of Philosophy, Department of Psychology, University of Belgrade, Čika Ljubina 18-20, 11000, Belgrade, Serbia
| | - M Ninković
- Faculty of Philosophy, Laboratory for Research of Individual Differences, University of Belgrade, Belgrade, Serbia
- Faculty of Philosophy, Department of Psychology, University of Belgrade, Čika Ljubina 18-20, 11000, Belgrade, Serbia
| | - M Živanović
- Faculty of Philosophy, Institute of Psychology, University of Belgrade, Belgrade, Serbia
- Faculty of Philosophy, Laboratory for Research of Individual Differences, University of Belgrade, Belgrade, Serbia
| | - S Stanković
- Faculty of Philosophy, Institute of Psychology, University of Belgrade, Belgrade, Serbia
- Faculty of Philosophy, Laboratory for Research of Individual Differences, University of Belgrade, Belgrade, Serbia
| | - M Branković
- Faculty of Philosophy, Laboratory for Research of Individual Differences, University of Belgrade, Belgrade, Serbia
- Institute for Philosophy and Social Theory, University of Belgrade, Belgrade, Serbia
- Faculty of Media and Communication, Singidunum University, Belgrade, Serbia
| | - P Lukić
- Faculty of Philosophy, Laboratory for Research of Individual Differences, University of Belgrade, Belgrade, Serbia
- Faculty of Philosophy, Department of Psychology, University of Belgrade, Čika Ljubina 18-20, 11000, Belgrade, Serbia
| | - G Opačić
- Faculty of Philosophy, Laboratory for Research of Individual Differences, University of Belgrade, Belgrade, Serbia
- Faculty of Philosophy, Department of Psychology, University of Belgrade, Čika Ljubina 18-20, 11000, Belgrade, Serbia
| | - I Žeželj
- Faculty of Philosophy, Laboratory for Research of Individual Differences, University of Belgrade, Belgrade, Serbia.
- Faculty of Philosophy, Department of Psychology, University of Belgrade, Čika Ljubina 18-20, 11000, Belgrade, Serbia.
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Purić D, Petrović MB, Živanović M, Lukić P, Zupan Z, Branković M, Ninković M, Lazarević LB, Stanković S, Žeželj I. Development of a novel instrument for assessing intentional non-adherence to official medical recommendations (iNAR-12): a sequential mixed-methods study in Serbia. BMJ Open 2023; 13:e069978. [PMID: 37369402 PMCID: PMC10410978 DOI: 10.1136/bmjopen-2022-069978] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Accepted: 06/13/2023] [Indexed: 06/29/2023] Open
Abstract
OBJECTIVES We aimed to (1) develop a novel instrument, suitable for the general population, capturing intentional non-adherence (iNAR), consisting of non-adherence to prescribed therapy, self-medication and avoidance of seeking medical treatment; (2) differentiate it from other forms of non-adherence, for example, smoking; and (3) relate iNAR to patient-related factors, such as sociodemographics, health status and endorsement of irrational beliefs (conspiratorial thinking and superstitions) and to healthcare-related beliefs and experiences ((mis)trust and negative experiences with the healthcare system, normalisation of patient passivity). DESIGN То generate iNAR items, we employed a focus group with medical doctors, supplemented it with a literature search and invited a public health expert to refine it further. We examined the internal structure and predictors of iNAR in an observational study. SETTING Data were collected online using snowball sampling and social networks. PARTICIPANTS After excluding those who failed one or more out of three attention checks, the final sample size was n=583 adult Serbian citizens, 74.4% female, mean age 39.01 years (SD=12.10). PRIMARY AND SECONDARY OUTCOME MEASURES The primary, planned outcome is the iNAR Questionnaire, while smoking was used for comparison purposes. RESULTS Factor analysis yielded a one-factor solution, and the final 12-item iNAR Questionnaire had satisfactory internal reliability (alpha=0.72). Health condition and healthcare-related variables accounted for 14% of the variance of iNAR behaviours, whereas sociodemographics and irrational beliefs did not additionally contribute. CONCLUSIONS We constructed a brief yet comprehensive measure of iNAR behaviours and related them to health and sociodemographic variables and irrational beliefs. The findings suggest that public health interventions should attempt to improve patients' experiences with the system and build trust with their healthcare practitioners rather than aim at specific demographic groups or at correcting patients' unfounded beliefs. STUDY REGISTRATION The design and confirmatory analyses plan were preregistered (https://osf.io/pnugm).
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Affiliation(s)
- D Purić
- Department of Psychology, University of Belgrade, Belgrade, Serbia
- Laboratory for Research of Individual Differences, University of Belgrade, Belgrade, Serbia
| | - M B Petrović
- Department of Psychology, University of Belgrade, Belgrade, Serbia
- Laboratory for Research of Individual Differences, University of Belgrade, Belgrade, Serbia
| | - M Živanović
- Laboratory for Research of Individual Differences, University of Belgrade, Belgrade, Serbia
- Institute for Psychology, University of Belgrade, Belgrade, Serbia
| | - P Lukić
- Department of Psychology, University of Belgrade, Belgrade, Serbia
- Laboratory for Research of Individual Differences, University of Belgrade, Belgrade, Serbia
| | - Z Zupan
- Laboratory for Research of Individual Differences, University of Belgrade, Belgrade, Serbia
- Institute for Psychology, University of Belgrade, Belgrade, Serbia
| | - M Branković
- Institute for Philosophy and Social Theory, Belgrade, Serbia
- Singidunum University, Belgrade, Serbia
| | - M Ninković
- Department of Psychology, University of Belgrade, Belgrade, Serbia
- Laboratory for Research of Individual Differences, University of Belgrade, Belgrade, Serbia
| | - L B Lazarević
- Laboratory for Research of Individual Differences, University of Belgrade, Belgrade, Serbia
- Institute for Psychology, University of Belgrade, Belgrade, Serbia
| | - S Stanković
- Laboratory for Research of Individual Differences, University of Belgrade, Belgrade, Serbia
- Institute for Psychology, University of Belgrade, Belgrade, Serbia
| | - I Žeželj
- Department of Psychology, University of Belgrade, Belgrade, Serbia
- Laboratory for Research of Individual Differences, University of Belgrade, Belgrade, Serbia
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Beletić A, Dudvarski-Ilić A, Nagorni-Obradović L, Milenković B, Ljujić M, Radojković D, Đorđević V, Stanković S. W138 Interpretative cut-off for alpha-1-antitrypsin concentration in detection of alpha-1-antitrypsin deficiency among adults – a pilot study in the Republic of Serbia. Clin Chim Acta 2022. [DOI: 10.1016/j.cca.2022.04.893] [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: 11/28/2022]
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Soldat-Stanković V, Popović-Pejičić S, Stanković S, Prtina A, Malešević G, Bjekić-Macut J, Livadas S, Ognjanović S, Mastorakos G, Micić D, Macut D. The effect of metformin and myoinositol on metabolic outcomes in women with polycystic ovary syndrome: role of body mass and adiponectin in a randomized controlled trial. J Endocrinol Invest 2022; 45:583-595. [PMID: 34665453 DOI: 10.1007/s40618-021-01691-5] [Citation(s) in RCA: 2] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2021] [Accepted: 10/08/2021] [Indexed: 12/20/2022]
Abstract
PURPOSE To compare the effects of insulin sensitizers metformin (MET) and myo-inositol (MI) on adiponectin levels and metabolic characteristics in women with polycystic ovary syndrome (PCOS) with respect to their body mass index (BMI). METHODS In this open label, parallel randomized clinical trial, 66 women with PCOS (33 normal-weight and 33 overweight/obese) were randomized to either MI (4 g/day) or MET (1500 mg/day) for a period of 6 months. Serum concentration of adiponectin, hormonal and metabolic laboratory outcomes and clinical assessment of BMI, body composition and Ferriman-Gallwey score (FG score) were evaluated before and after treatment. RESULTS After the 6-month intervention, comparison between MET and MI in time to treatment analysis showed no significant differences between the two treatments for all analyzed parameters. Only borderline significantly lower AUC glucose was found in the MET group in comparison to the MI group (p = 0.071). The main effect of treatment was shown for glucose concentration at 120 min OGTT (p = 0.032) and testosterone (p = 0.002). The main effect of time was shown for body mass (p = 0.004), waist circumference (p < 0.001), BMI (p = 0.003), body fat mass (p = 0.001), adiponectin (p = 0.020), fasting glucose (p = 0.001), testosterone (p = 0.015), SHBG (p = 0.013), 17OH progesterone (p = 0.008), LH (p = 0.004) and estradiol (p = 0.014). CONCLUSION Our study showed similar effects of MET and MI on BMI, body composition, hormonal profile, metabolism of glucose and insulin, and adiponectin level. The two insulin sensitizers, MET and MI, were useful in reducing BMI and improving body composition without significant differences between the two treatments in PCOS women. TRIAL REGISTRATION ISRCTN13199265. Trial registration date: 14.04.2021. (ISRCTN Registry), retrospectively registered.
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Affiliation(s)
- V Soldat-Stanković
- University Clinical Center of the Republic of Srpska, Internal Medicine Clinic, Faculty of Medicine, University of Banja Luka, Banja Luka, Bosnia and Herzegovina
| | - S Popović-Pejičić
- University Clinical Center of the Republic of Srpska, Internal Medicine Clinic, Faculty of Medicine, University of Banja Luka, Banja Luka, Bosnia and Herzegovina
| | - S Stanković
- Faculty of Medicine, University of Banja Luka, Banja Luka, Bosnia and Herzegovina
| | - A Prtina
- Faculty of Medicine, University of Banja Luka, Banja Luka, Bosnia and Herzegovina
| | - G Malešević
- University Clinical Center of the Republic of Srpska, Internal Medicine Clinic, Faculty of Medicine, University of Banja Luka, Banja Luka, Bosnia and Herzegovina
| | - J Bjekić-Macut
- Department of Endocrinology, CHC Bežanijska Kosa, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - S Livadas
- Endocrine Unit, Metropolitan Hospital, Athens, Greece
| | - S Ognjanović
- Clinic of Endocrinology, Diabetes and Metabolic Diseases, Clinical Center of Serbia, Faculty of Medicine, University of Belgrade, dr Subotica 13, 11000, Belgrade, Serbia
| | - G Mastorakos
- Unit of Endocrine Diseases, Aretaieion Hospital, National and Kapodistrian University of Athens, Athens, Greece
| | - D Micić
- Department of Medical Sciences, Serbian Academy of Sciences and Arts, Belgrade, Serbia
| | - D Macut
- Clinic of Endocrinology, Diabetes and Metabolic Diseases, Clinical Center of Serbia, Faculty of Medicine, University of Belgrade, dr Subotica 13, 11000, Belgrade, Serbia.
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Savić I, Nikolić M, Nikolić A, Kandić V, Vico I, Duduk N, Stanković S. First Report of Fusarium verticillioides Causing Fusariosis on Triticale Grain in Serbia. Plant Dis 2022; 106:1071. [PMID: 34735280 DOI: 10.1094/pdis-07-21-1579-pdn] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Affiliation(s)
- I Savić
- Maize Research Institute, Zemun Polje, Slobodana Bajića 1, 11185 Belgrade, Serbia
| | - M Nikolić
- Maize Research Institute, Zemun Polje, Slobodana Bajića 1, 11185 Belgrade, Serbia
| | - A Nikolić
- Maize Research Institute, Zemun Polje, Slobodana Bajića 1, 11185 Belgrade, Serbia
| | - V Kandić
- Maize Research Institute, Zemun Polje, Slobodana Bajića 1, 11185 Belgrade, Serbia
| | - I Vico
- University in Belgrade, Faculty of Agriculture, Nemanjina 6, 11080 Belgrade, Serbia
| | - N Duduk
- University in Belgrade, Faculty of Agriculture, Nemanjina 6, 11080 Belgrade, Serbia
| | - S Stanković
- Maize Research Institute, Zemun Polje, Slobodana Bajića 1, 11185 Belgrade, Serbia
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Knežević M, Berić T, Buntić A, Delić D, Nikolić I, Stanković S, Stajković-Srbinović O. Potential of root nodule nonrhizobial endophytic bacteria for growth promotion of Lotus corniculatus L. and Dactylis glomerata L. J Appl Microbiol 2021; 131:2929-2940. [PMID: 34003543 DOI: 10.1111/jam.15152] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [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: 03/10/2021] [Revised: 05/11/2021] [Accepted: 05/11/2021] [Indexed: 11/29/2022]
Abstract
AIMS This research aimed to isolate and characterize nonrhizobial endophytic bacteria from root nodules of Medicago sativa L. and Lotus corniculatus L. with plant growth-promoting characteristics and to test its activity in a pot experiment with acid soil. METHODS AND RESULTS Out of 44 nonrhizobial isolates, the majority exhibited indole-3-acetic acid (IAA) production; 29 produced siderophores, few isolates performed phosphate solubilization and/or produced lytic enzymes, while 30% of isolates showed notable antifungal activity. The most promising strains were identified as members of Bacillus, Pseudomonas and Serratia genera, based on 16S rRNA. Bacillus megaterium DZK1BH exhibited the overall best attributes for plant growth promotion and positively influenced the growth of L. corniculatus and Dactylis glomerata. CONCLUSIONS Root nodule endophytic B. megaterium DZK1BH could potentially be used as a biofertilizer for growing L. corniculatus L. and D. glomerata L. in acid soils, while Bacillus mojavensis L3 is a candidate for further antifungal potential investigation. SIGNIFICANCE OF IMPACT OF THE STUDY The use of root nodule endophytic bacteria with PGP traits may find its future application in organic agriculture, as their utilization could decrease the use of chemical fertilizers and pesticides and simultaneously promote plant growth, especially in soils with low production quality.
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Affiliation(s)
- M Knežević
- Department of Microbiology, Institute of Soil Science, Belgrade, Serbia
| | - T Berić
- Faculty of Biology, University of Belgrade, Belgrade, Serbia
| | - A Buntić
- Department of Microbiology, Institute of Soil Science, Belgrade, Serbia
| | - D Delić
- Department of Microbiology, Institute of Soil Science, Belgrade, Serbia
| | - I Nikolić
- Faculty of Biology, University of Belgrade, Belgrade, Serbia
| | - S Stanković
- Faculty of Biology, University of Belgrade, Belgrade, Serbia
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Janakiev T, Dimkić I, Bojić S, Fira D, Stanković S, Berić T. Bacterial communities of plum phyllosphere and characterization of indigenous antagonistic Bacillus thuringiensis R3/3 isolate. J Appl Microbiol 2019; 128:528-543. [PMID: 31606926 DOI: 10.1111/jam.14488] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [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: 08/27/2019] [Revised: 09/30/2019] [Accepted: 10/08/2019] [Indexed: 12/01/2022]
Abstract
AIMS The characterization of bacterial communities diversity on four local plum cultivars in two phenological stages using culture-dependent and culture-independent methods and screening among culturable plum community for indigenous bacteria active against phytopathogens. METHODS AND RESULTS The bacterial communities associated with leaves and fruits of four local Serbian plum cultivars (Požegača, Ranka, Čačanska Lepotica and Čačanska Rodna) were investigated in two phenological stages during early (May) and late (July) fruit maturation. Metagenomic approach revealed Methylobacterium, Sphingomonas and Hymenobacter as dominant genera. The most frequently isolated representatives with cultivable approach were pseudomonads with Pseudomonas syringae and Pseudomonas graminis, the most likely resident species of plum community. Antagonistic Bacillus thuringiensis R3/3 isolate from plum phyllosphere had ability to produce exoenzymes, reduce the growth of phytopathogenic bacteria in co-culture environment and show quorum quenching activity. CONCLUSIONS Plum cultivar and growth season contribute to the structure of the bacterial community associated with plum. Plum phyllosphere is good source of antagonists effective against phytopathogens. SIGNIFICANCE AND IMPACT OF STUDY Knowledge of bacterial communities on plum will have an impact on studies related to phyllosphere ecology and biocontrol. The indigenous antagonistic isolate, B. thuringiensis R3/3, from plum could be further investigated for its potential use in biological control of plum diseases.
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Affiliation(s)
- T Janakiev
- University of Belgrade - Faculty of Biology, Belgrade, Serbia
| | - I Dimkić
- University of Belgrade - Faculty of Biology, Belgrade, Serbia
| | - S Bojić
- University of Belgrade - Faculty of Biology, Belgrade, Serbia
| | - D Fira
- University of Belgrade - Faculty of Biology, Belgrade, Serbia
| | - S Stanković
- University of Belgrade - Faculty of Biology, Belgrade, Serbia
| | - T Berić
- University of Belgrade - Faculty of Biology, Belgrade, Serbia
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Nikolić I, Berić T, Dimkić I, Popović T, Lozo J, Fira D, Stanković S. Biological control of Pseudomonas syringae pv. aptata on sugar beet with Bacillus pumilus SS-10.7 and Bacillus amyloliquefaciens (SS-12.6 and SS-38.4) strains. J Appl Microbiol 2018; 126:165-176. [PMID: 30117660 DOI: 10.1111/jam.14070] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [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: 06/29/2018] [Revised: 08/06/2018] [Accepted: 08/13/2018] [Indexed: 12/20/2022]
Abstract
AIM Assessment of biological control of Pseudomonas syringae pv. aptata using crude lipopeptide extracts (CLEs) of two Bacillus amyloliquefaciens strains (SS-12.6 and SS-38.4) and one Bacillus pumilus strain (SS-10.7). METHODS AND RESULTS The minimum inhibitory concentration (MIC) of CLEs and their combinations against the pathogen and potential interaction between the extracts were determined in vitro. The most effective antibacterial activity was achieved with the CLE from B. amyloliquefaciens SS-12.6, with an MIC value of 0·63 mg ml-1 . Interactions between CLE combinations were mostly indifferent. The biocontrol potential of CLEs, mixtures of CLEs, and cell culture of B. amyloliquefaciens SS-12.6 was tested on sugar beet plants inoculated with P. syringae pv. aptata P53. The best result in inhibiting the appearance of tissue necrosis (up to 92%) was achieved with B. amyloliquefaciens SS-12.6 cell culture. CONCLUSION This work demonstrated significant biocontrol potential of the CLE and cell culture of B. amyloliquefaciens SS-12.6 which successfully suppress leaf spot disease severity on sugar beet plants. SIGNIFICANCE AND IMPACT OF THE STUDY The findings of biocontrol of sugar beet emerging pathogen will contribute to growers in terms of alternative disease control management. This study represents first assessment of biological control of P. syringae pv. aptata.
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Affiliation(s)
- I Nikolić
- Faculty of Biology, University of Belgrade, Belgrade, Serbia
| | - T Berić
- Faculty of Biology, University of Belgrade, Belgrade, Serbia
| | - I Dimkić
- Faculty of Biology, University of Belgrade, Belgrade, Serbia
| | - T Popović
- Institute for Plant Protection and Environment, Belgrade, Serbia
| | - J Lozo
- Faculty of Biology, University of Belgrade, Belgrade, Serbia
| | - D Fira
- Faculty of Biology, University of Belgrade, Belgrade, Serbia
| | - S Stanković
- Faculty of Biology, University of Belgrade, Belgrade, Serbia
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Kuzmanović M, Božanić DK, Milivojević D, Ćulafić DM, Stanković S, Ballesteros C, Gonzalez-Benito J. Sodium-alginate biopolymer as a template for the synthesis of nontoxic red emitting Mn2+-doped CdS nanoparticles. RSC Adv 2017. [DOI: 10.1039/c7ra11011a] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [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] Open
Abstract
Structural and optical characteristics of manganese doped cadmium sulfide nanoparticles prepared by in situ chemical synthesis using biocompatible Na-alginate biopolymer as a template is reported.
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Affiliation(s)
- M. Kuzmanović
- Department of Material Science and Engineering
- Faculty of Engineering and Architecture
- Ghent University
- Belgium
- Department of Materials Science and Engineering and Chemical Engineering
| | - D. K. Božanić
- Department of Materials Science and Engineering and Chemical Engineering
- IQMAAB
- Universidad Carlos III de Madrid
- 28911 Leganés (Madrid)
- Spain
| | - D. Milivojević
- University of Belgrade
- Vinča Institute of Nuclear Sciences
- 11001 Belgrade
- Serbia
| | - D. Mitić Ćulafić
- University of Belgrade
- Faculty of Biology
- Center for Genotoxicology and Ecogenotoxicology
- 11001 Belgrade
- Serbia
| | - S. Stanković
- University of Belgrade
- Faculty of Biology
- Center for Genotoxicology and Ecogenotoxicology
- 11001 Belgrade
- Serbia
| | - C. Ballesteros
- Department of Physics
- Universidad Carlos III de Madrid
- Avenida de la Universidad 30
- 28911 Leganés (Madrid)
- Spain
| | - J. Gonzalez-Benito
- Department of Materials Science and Engineering and Chemical Engineering
- IQMAAB
- Universidad Carlos III de Madrid
- 28911 Leganés (Madrid)
- Spain
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Hu Y, Thomson DJ, Khokhar AZ, Stanković S, Mitchell CJ, Gardes FY, Penades JS, Mashanovich GZ, Reed GT. Angled multimode interferometer for bidirectional wavelength division (de)multiplexing. R Soc Open Sci 2015; 2:150270. [PMID: 26587242 PMCID: PMC4632514 DOI: 10.1098/rsos.150270] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Accepted: 09/28/2015] [Indexed: 06/05/2023]
Abstract
We have demonstrated a bidirectional wavelength division (de)multiplexer (WDM) on the silicon-on-insulator platform using two 4-channel angled multimode interferometers (AMMIs) sharing the same multimode interference waveguide. An excellent match of the peak transmission wavelength of each channel between the two AMMIs was achieved. The input and output access waveguides were arranged in a configuration such that the propagation of light of one AMMI in the multimode interference waveguide suffered minimal perturbation by the input and output waveguides of the other AMMI. This type of device is ideal for the WDM system for datacom or telecom applications, e.g. an integrated optical transceiver, where the transmission wavelengths are required to match with the receiving wavelengths. The device also benefits from simple fabrication (as only a single lithography and etching step is required), improved convenience for the transceiver layout design, a reduction in tuning power and circuitry and efficient use of layout space. A low insertion loss of 3-4 dB, and low crosstalk of -15 to -20 dB, was achieved.
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Affiliation(s)
| | | | | | | | | | | | | | | | - G. T. Reed
- Optoelectronics Research Centre, University of Southampton, Southampton SO17 1BJ, UK
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Lozo J, Berić T, Terzić-Vidojević A, Stanković S, Fira D, Stanisavljević L. Microbiota associated with pollen, bee bread, larvae and adults of solitary bee Osmia cornuta (Hymenoptera: Megachilidae). Bull Entomol Res 2015; 105:470-6. [PMID: 25895542 DOI: 10.1017/s0007485315000292] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [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: 05/25/2023]
Abstract
Using cultivation-dependant method, we isolated 184 strains from fresh and old bee bread, pollen, larvae and adults of solitary bee Osmia cornuta. The 16S rDNA sequencing of 79 selected isolates gave the final species-specific identification of strains. Phylogenetic analysis indicated that microbiota isolated from five different sources were represented with 29 species within three different phyla, Firmicutes with 25 species, Actinobacteria with only one species and Proteobacteria with three species of Enterobacteriaceae. Bacterial biodiversity presented with Shannon-Wiener index (H') was highest in the alimentary tract of adults and old bee bread (H' = 2.43 and H' = 2.53, respectively) and in the same time no dominance of any species was scored. On the contrary, results obtained for Simpson index (D) showed that in pollen samples the dominant species was Pantoea agglomerans (D = 0.42) while in fresh bee bread that was Staphylococcus sp. (D = 0.27). We assume that microbial diversity detected in the tested samples of solitary bee O. cornuta probably come from environment.
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Affiliation(s)
- J Lozo
- Faculty of Biology,University of Belgrade,Studentski trg 16,11000 Belgrade,Serbia
| | - T Berić
- Faculty of Biology,University of Belgrade,Studentski trg 16,11000 Belgrade,Serbia
| | - A Terzić-Vidojević
- University of Belgrade - Institute of Molecular Genetics and Genetic Engineering,Vojvode Stepe 444a,P.O. Box 23,11010 Belgrade,Serbia
| | - S Stanković
- Faculty of Biology,University of Belgrade,Studentski trg 16,11000 Belgrade,Serbia
| | - D Fira
- Faculty of Biology,University of Belgrade,Studentski trg 16,11000 Belgrade,Serbia
| | - L Stanisavljević
- Faculty of Biology,University of Belgrade,Studentski trg 16,11000 Belgrade,Serbia
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Kostić M, Dražic S, Popović Z, Stanković S, Sivčev I, Živanović T. Developmental and Feeding Alternations inLeptinotarsa DecemlineataSay. (Coleoptera: Hrysomelidae) Caused bySalvia OfficinalisL. (Lamiaceae) Essential Oil. BIOTECHNOL BIOTEC EQ 2014. [DOI: 10.1080/13102818.2007.10817488] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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14
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D’hooghe M, De Kimpe N, Stanković S, Vanderhaegen T, Abbaspour Tehrani K. Application of 3-Bromo-3-ethylazetidines and 3-Ethylideneazetidines for the Synthesis of Functionalized Azetidines. Synlett 2013. [DOI: 10.1055/s-0033-1340250] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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15
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Berić T, Stanković S, Draganić V, Kojić M, Lozo J, Fira D. Novel antilisterial bacteriocin licheniocin 50.2 from Bacillus licheniformis VPS50.2 isolated from soil sample. J Appl Microbiol 2013; 116:502-10. [PMID: 24238327 DOI: 10.1111/jam.12393] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [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: 09/18/2013] [Revised: 11/08/2013] [Accepted: 11/08/2013] [Indexed: 11/28/2022]
Abstract
AIM To isolate and characterize bacteriocin, licheniocin 50.2, from soil bacteria identified as Bacillus licheniformis. METHODS AND RESULTS The strain B. licheniformis VPS50.2 was identified as bacteriocin producer, effective against Gram-positive bacteria, including Listeria monocytogenes, methicillin-resistant Staphylococcus aureus (MRSA) and β-haemolytic streptococci. The start of bacteriocin production coincides with the beginning of sporulation. Ammonium sulfate precipitation, chloroform extraction and ultrafiltration were used for bacteriocin purification. MALDI TOF/TOF mass spectrometry of purified sample detected the protein with molecular mass of 3253·209 Da. N-terminal sequencing recognized first 15 amino acids with the sequence: W E E Y N I I X Q L G N K G Q. We named the newly characterized bacteriocin as subclass II.3 bacteriocin, licheniocin 50·2. The bacteriocin activity was insensitive to lysozyme and proteinase K, heat stable after incubation at 100°C for 30 min and over wide range of pH (2-12). MICs of crude bacteriocin extract were determined for L. monocytogenes and MRSA. Time-kill study showed that licheniocin had bactericidal effect to L. monocytogenes. CONCLUSION A novel, thermostable, pH-tolerant bacteriocin active against Gram-positive bacteria was isolated. SIGNIFICANCE AND IMPACT OF THE STUDY Attributes of new, stable licheniocin 50.2 make it a promising agent for application as biopreservative in food industry.
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Affiliation(s)
- T Berić
- Faculty of Biology, University of Belgrade, Belgrade, Serbia
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Stanković S, Ilić N, Ilić T. 29.Subclinical cervical spondylotic myelopathy – Early detection of long tract pathways involvement. Clin Neurophysiol 2012. [DOI: 10.1016/j.clinph.2011.11.069] [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: 11/30/2022]
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17
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Stanković S, Goossens H, Catak S, Tezcan M, Waroquier M, Van Speybroeck V, D’hooghe M, De Kimpe N. Solvent-Controlled Selective Transformation of 2-Bromomethyl-2-methylaziridines to Functionalized Aziridines and Azetidines. J Org Chem 2012; 77:3181-90. [DOI: 10.1021/jo202637a] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sonja Stanković
- Department of Sustainable Organic
Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent,
Belgium
| | - Hannelore Goossens
- Center for Molecular
Modeling, Ghent University, Technologiepark
903, B-9052 Zwijnaarde,
Belgium, Member of QCMM-Alliance Ghent-Brussels
| | - Saron Catak
- Center for Molecular
Modeling, Ghent University, Technologiepark
903, B-9052 Zwijnaarde,
Belgium, Member of QCMM-Alliance Ghent-Brussels
| | - Meniz Tezcan
- Department of Sustainable Organic
Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent,
Belgium
| | - Michel Waroquier
- Center for Molecular
Modeling, Ghent University, Technologiepark
903, B-9052 Zwijnaarde,
Belgium, Member of QCMM-Alliance Ghent-Brussels
| | - Veronique Van Speybroeck
- Center for Molecular
Modeling, Ghent University, Technologiepark
903, B-9052 Zwijnaarde,
Belgium, Member of QCMM-Alliance Ghent-Brussels
| | - Matthias D’hooghe
- Department of Sustainable Organic
Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent,
Belgium
| | - Norbert De Kimpe
- Department of Sustainable Organic
Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent,
Belgium
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Goossens H, Vervisch K, Catak S, Stanković S, D’hooghe M, De Proft F, Geerlings P, De Kimpe N, Waroquier M, Van Speybroeck V. Reactivity of Activated versus Nonactivated 2-(Bromomethyl)aziridines with respect to Sodium Methoxide: A Combined Computational and Experimental Study. J Org Chem 2011; 76:8698-709. [DOI: 10.1021/jo201255z] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Hannelore Goossens
- Center for Molecular Modeling, Ghent University, Member of QCMM-Alliance Ghent-Brussels,
Technologiepark 903, B-9052 Zwijnaarde, Belgium
| | - Karel Vervisch
- Department of Sustainable Organic
Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent,
Belgium
| | - Saron Catak
- Center for Molecular Modeling, Ghent University, Member of QCMM-Alliance Ghent-Brussels,
Technologiepark 903, B-9052 Zwijnaarde, Belgium
| | - Sonja Stanković
- Department of Sustainable Organic
Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent,
Belgium
| | - Matthias D’hooghe
- Department of Sustainable Organic
Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent,
Belgium
| | - Frank De Proft
- Eenheid Algemene
Chemie (ALGC), Vrije Universiteit Brussel (VUB), Member of QCMM-Alliance
Ghent-Brussels, Pleinlaan 2, 1050 Brussels, Belgium
| | - Paul Geerlings
- Eenheid Algemene
Chemie (ALGC), Vrije Universiteit Brussel (VUB), Member of QCMM-Alliance
Ghent-Brussels, Pleinlaan 2, 1050 Brussels, Belgium
| | - Norbert De Kimpe
- Department of Sustainable Organic
Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent,
Belgium
| | - Michel Waroquier
- Center for Molecular Modeling, Ghent University, Member of QCMM-Alliance Ghent-Brussels,
Technologiepark 903, B-9052 Zwijnaarde, Belgium
| | - Veronique Van Speybroeck
- Center for Molecular Modeling, Ghent University, Member of QCMM-Alliance Ghent-Brussels,
Technologiepark 903, B-9052 Zwijnaarde, Belgium
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Stanković S, D'hooghe M, Catak S, Eum H, Waroquier M, Van Speybroeck V, De Kimpe N, Ha HJ. Regioselectivity in the ring opening of non-activated aziridines. Chem Soc Rev 2011; 41:643-65. [PMID: 21894345 DOI: 10.1039/c1cs15140a] [Citation(s) in RCA: 345] [Impact Index Per Article: 26.5] [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
In this critical review, the ring opening of non-activated 2-substituted aziridines via intermediate aziridinium salts will be dealt with. Emphasis will be put on the relationship between the observed regioselectivity and inherent structural features such as the nature of the C2 aziridine substituent and the nature of the electrophile and the nucleophile. This overview should allow chemists to gain insight into the factors governing the regioselectivity in aziridinium ring openings (81 references).
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Affiliation(s)
- Sonja Stanković
- Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
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Stanković S, Catak S, D’hooghe M, Goossens H, Abbaspour Tehrani K, Bogaert P, Waroquier M, Van Speybroeck V, De Kimpe N. Synthesis of 3-Methoxyazetidines via an Aziridine to Azetidine Rearrangement and Theoretical Rationalization of the Reaction Mechanism. J Org Chem 2011; 76:2157-67. [DOI: 10.1021/jo102555r] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sonja Stanković
- Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
| | - Saron Catak
- Center for Molecular Modeling, Ghent University, Technologiepark 903, B-9052 Zwijnaarde, Belgium, Member of QCMM-Alliance Ghent-Brussels
| | - Matthias D’hooghe
- Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
| | - Hannelore Goossens
- Center for Molecular Modeling, Ghent University, Technologiepark 903, B-9052 Zwijnaarde, Belgium, Member of QCMM-Alliance Ghent-Brussels
| | - Kourosch Abbaspour Tehrani
- Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
| | - Piet Bogaert
- Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
| | - Michel Waroquier
- Center for Molecular Modeling, Ghent University, Technologiepark 903, B-9052 Zwijnaarde, Belgium, Member of QCMM-Alliance Ghent-Brussels
| | - Veronique Van Speybroeck
- Center for Molecular Modeling, Ghent University, Technologiepark 903, B-9052 Zwijnaarde, Belgium, Member of QCMM-Alliance Ghent-Brussels
| | - Norbert De Kimpe
- Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
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Stanković S, Marković S, Gutman I, Sretenović S. Hydrogen-mediated Stone-Wales isomerization of dicyclopenta[de,mn]anthracene. J Mol Model 2010; 16:1519-27. [PMID: 20683790 DOI: 10.1007/s00894-010-0669-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2009] [Accepted: 01/18/2010] [Indexed: 10/19/2022]
Abstract
The mechanism of transformation of two radicals (R1p and R1i) obtained by addition of a hydrogen atom to an external and internal carbon atom of dicyclopenta[de,mn]anthracene (P1) was investigated. Two pathways were revealed. The first mechanism is a one-step process, whereas the second mechanism includes two transition states and a cyclobutyl intermediate. The formation of R1p and R1i and the homolytic cleavage of the radicals obtained during the isomerization processes were also examined. In both pathways the addition of a hydrogen atom to the internal carbon significantly lowers the activation energy for hydrogen-mediated isomerization of P1 to acefluoranthene. This finding could be explained by the specific electronic structures of the transition states and intermediates participating in the isomerization processes.
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Affiliation(s)
- Sonja Stanković
- Faculty of Science, University of Kragujevac, 12 Radoja Domanovića, 34000, Kragujevac, Serbia
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D'hooghe M, Catak S, Stanković S, Waroquier M, Kim Y, Ha HJ, Van Speybroeck V, De Kimpe N. Systematic Study of Halide-Induced Ring Opening of 2-Substituted Aziridinium Salts and Theoretical Rationalization of the Reaction Pathways. European J Org Chem 2010. [DOI: 10.1002/ejoc.201000486] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Stanković S, D'hooghe M, De Kimpe N. Microwave-assisted regioselective ring opening of non-activated aziridines by lithium aluminium hydride. Org Biomol Chem 2010; 8:4266-73. [DOI: 10.1039/c004960c] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Stanković S, Marković S, Radenković S, Gutman I. Formation and isomerization of dicyclopenta[de,mn]anthracene. Electronic structure study. J Mol Model 2009; 15:953-8. [PMID: 19184132 DOI: 10.1007/s00894-009-0453-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2008] [Accepted: 12/18/2008] [Indexed: 11/28/2022]
Abstract
The formation of dicyclopenta[de,mn]anthracene (P1) and its isomerization into dicyclopenta[jk,mn]phenanthrene (P3) was investigated using density functional theory. It was shown that P1 is formed from 1,4-diethynilanthracene, but due to its instability, it undergoes further transformation. This transformation involves rearrangements of some hydrogen atoms and ring contraction/ring expansion process, yielding as a final product the isomer P3. The energies of activation for the P1-->P3 intraconversion show that this reaction is competitive to the other, previously investigated isomerization of P1 into dicyclopenta[de,kl]anthracene (P2). In addition, our investigation shows that the formation of P3 from P1 is energetically more favorable than the formation of P3 from P2. Thus, the presence of the isomer P3 in the reaction mixtures could also be caused by the isomerization of the very unstable isomer P1.
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Affiliation(s)
- Sonja Stanković
- Faculty of Science, University of Kragujevac, P.O. Box 60, 34000, Kragujevac, Serbia.
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Ponec R, Fias S, Van Damme S, Bultinck P, Gutman I, Stanković S. The close relation between cyclic delocalization, energy effects of cycles and aromaticity. ACTA ACUST UNITED AC 2009. [DOI: 10.1135/cccc2008065] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
New evidence questioning the multidimensionality of the aromaticity phenomenon exemplified in what is called orthogonality between the classical (structural and energetic) and magnetic aromaticity indices and measures is reported. For this purpose, the recently proposed methodologies for the quantitative characterization of the energy benefits associated with the cyclic arrangement of mobile π-electrons in polycyclic aromatic hydrocarbons are compared with the indices characterizing the extent of cyclic delocalization in the corresponding conjugated circuits. The reported close correlation between both types of indices implies that no discrepancies between classical and magnetic aromaticity measures exist provided the comparison is based on the indices of inherently local nature and/or the interfering contributions of contaminating conjugated circuits is properly taken into account in the description of aromaticity measures like topological resonance energy (TRE) or nucleus independent chemical shift (NICS).
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Marković S, Stanković S, Radenković S, Gutman I. Electronic structure study of thermal intraconversions of some dicyclopenta-fused polycyclic aromatic compounds. J Chem Inf Model 2008; 48:1984-9. [PMID: 18816023 DOI: 10.1021/ci8002396] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The electronic structure of dicyclopenta[de,mn]anthracene (P1), dicyclopenta[ de,kl]anthracene (P2), and dicyclopenta[jk,mn]phenanthrene (P3) and their mutual isomerization processes are investigated using density functional theory. Two mechanisms for the thermal intraconversion of P1 to P2 were found. The first mechanism occurs via ethynylaceanthrylene (I0), and the second involves a 1,2-hydrogen shift. It is supposed that I0 is initially formed during the flash vacuum pyrolysis experiments, eventually rearranging to P2 on high temperatures. The energetics of the latter mechanism also indicate that P1 isomerizes to P2. The mechanism for a transformation of P2 to P3 is based on a ring contraction/ring conversion process and requires extremely high temperatures. Our investigation is in accord with the experimental results: unsuccessful synthesis of P1, stability of P2 at high temperature, and formation of P3 under extreme temperature regime.
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Affiliation(s)
| | - Ivan Gutman
- b Faculty of Science , University of Kragujevac , Serbia
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Abstract
The topological resonance energy (TRE) was conceived in the 1970s. From the very beginning, it was known that TRE is equal to the collective energy-effect of all cycles present in a conjugated molecule. Also in the 1970s a theory of cyclic conjugation was elaborated, by means of which it was possible to compute the energy-effect ef(Z) of each individual cycle Z present in a conjugated molecule. Yet, the connection between TRE and the ef(Z)-values was, until now, not studied. We now show that TRE and the sum of the ef(Z)-values are closely correlated but that a certain correction needs to be made by taking into account the energy-effects of pairs, triplets, quartets, etc. of cycles.
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Affiliation(s)
- Ivan Gutman
- Faculty of Science, University of Kragujevac, 34000 Kragujevac, Serbia.
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Klisurić O, Stanković S, Lazar D, Sakac M, Penov-Gasi K, Djurendić E, Zobel D, Wagner A. Hydrogen bonding and structure-activity analysis of some antiandrogens. Acta Crystallogr A 2006. [DOI: 10.1107/s0108767306094104] [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: 11/10/2022] Open
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Gojak S, Radenković S, Kovačević R, Stanković S, Đurđević J, Gutman I. A DIFFERENCE BETWEEN THE π-ELECTRON PROPERTIES OF CATAFUSENES AND PERIFUSENES. Polycycl Aromat Compd 2006. [DOI: 10.1080/10406630600760568] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Dragović S, Nedić O, Stanković S, Bacić G. Radiocesium accumulation in mosses from highlands of Serbia and Montenegro: chemical and physiological aspects. J Environ Radioact 2004; 77:381-388. [PMID: 15381328 DOI: 10.1016/j.jenvrad.2004.04.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2003] [Revised: 04/04/2004] [Accepted: 04/26/2004] [Indexed: 05/24/2023]
Abstract
The aim of this work was (i) to determine the activity levels of 137Cs in mosses from highland ecosystems of Serbia and Montenegro, (ii) to find out if radiocesium is associated with essential biomacromolecules, and (iii) to investigate 137Cs distribution among intracellular compartments. It was found that biomolecules of mosses do not bind significant amounts of radiocesium (2.3-3.3% of the absorbed 137Cs), a behavior that was independent of the moss species. Cellular fractionation of mosses showed that membranes are the primary 137Cs-binding sites at the cellular level. They contained 26.1-43.1% of the initial radiocesium activity. It seems that 137Cs-binding molecules in different mosses are of similar chemical nature, and their distribution between various cellular compartments is not species specific.
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Affiliation(s)
- S Dragović
- Institute for the Application of Nuclear Energy (INEP), Banatska 31b, 11080 Belgrade, Yugoslavia.
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Stanković S. [X-rays in molecular biophysics: structure-activity relationships and activity of steroid hormones]. Med Pregl 2001; 54:413-21. [PMID: 11876002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
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Stanković S, Djurović I, Pitas I. Watermarking in the space/spatial-frequency domain using two-dimensional Radon-Wigner distribution. IEEE Trans Image Process 2001; 10:650-658. [PMID: 18249654 DOI: 10.1109/83.913599] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
A two-dimensional (2-D) signal with a variable spatial frequency is proposed as a watermark in the spatial domain. This watermark is characterized by a linear frequency change. It can be efficiently detected by using 2-D space/spatial-frequency distributions. The projections of the 2-D Wigner distribution--the 2-D Radon-Wigner distribution, are used in order to emphasize the watermark detection process. The watermark robustness with respect to some very important image processing attacks, such as for example, the translation, rotation, cropping, JPEG compression, and filtering, is demonstrated and tested by using Stirmark 3.1.
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Affiliation(s)
- S Stanković
- Electrical Engineering Department, University of Montenegro, Podgorica, Montenegro, Yugoslavia.
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Stanković S, Glisic S, Alavanatić D. The effect of a gender difference in the apolipoprotein E gene DNA polymorphism on serum lipid levels in a Serbian healthy population. Clin Chem Lab Med 2000; 38:539-44. [PMID: 10987203 DOI: 10.1515/cclm.2000.079] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
To date, no data have been available on relationship between apolipoprotein E polymorphism and lipid levels in Serbian populations. Blood samples were obtained from 591 healthy normal individuals (193 women and 398 men). A 244 bp sequence of the apolipoprotein E gene including the two polymorphic sites was amplified by polymerase chain reaction. After digestion with Hhal, DNA fragments were visualized by microplate array diagonal gel electrophoresis. In men, levels of both total and low-density lipoprotein cholesterol among the three apolipoprotein E genotype groups differed significantly (p <0.05). The epsilon2 allele was associated with lower concentrations of both total and low-density lipoprotein cholesterol, where the epsilon4 allele had the opposite effects. No significant effects of apolipoprotein E polymorphism on serum lipid levels were observed in women. The presented data could be taken into consideration in any future disease risk evaluation in this population.
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Affiliation(s)
- S Stanković
- Department of Medical Biochemistry, University School of Pharmacy, Belgrade, Yugoslavia
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Miladinović D, Djujić I, Stanković S. Variation of selenium content in growing wild plants during vegetative period. J Environ Pathol Toxicol Oncol 1998; 17:217-20. [PMID: 9726793] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
There is evidence that selenium (Se) is essential for humans, animals, and some species of microorganisms. This study examines the dynamics of the change of Se accumulation in some growing wild plants: Astragalus onobrychis var. Chlorocarpus (Gris.) Stoj. et Stef. (Leguminosae), Oxytropis pilosa (L.) DC., Salvia officinalis, L., and Simphytum ottomanum L. The influences of some ecological factors (Se content in soil, temperature, and rainfall) have also been surveyed. The Se content of plants from Serbia was 44.5 to 177.0 microg/kg of dry weight. Astragalus onobrychis var. Chlorocarpus (Gris.) Stoj. et Stef. (Leguminosae) accumulates the highest Se content in the blooming stage (161.3 microg/kg). All soils studied were deficient in selenium (< 250 microg/kg). We found a significant correlation between Se content in plants and in the soil (p = 0.88). Rainfall has an influence on Se content in Oxytropis, Salvia, and Simphytum, but not in Astragalus. Our results suggest that Se cannot have a similar role in all plants examined.
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Affiliation(s)
- D Miladinović
- Department of Chemistry, University of Nis, Yugoslavia
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Stanković S, Lazar D, Pejanović V, Petrović J, Courseille C. D-Secoestrone Derivatives. IV. 3-Hydroxy-18-methyl-17-oxaestra-1,3,5(10)-trien-16-one. Acta Crystallogr C 1998. [DOI: 10.1107/s0108270197019161] [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: 11/10/2022] Open
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Avramović I, Benderać R, Veličković D, Stanković S, Kovačević M. Calibration of radon diffusion cup equipped with CR-39 track detector. RADIAT MEAS 1995. [DOI: 10.1016/1350-4487(95)00195-k] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Stanković S, Petrović J, Miljković D, Pejanović V, Stefanović A, Bruvo M. D-Secoestrone derivatives. III. 17-Fluoro-3-methoxy-16,17-secoestra-1,3,5(10)-triene-16-nitrile. Acta Crystallogr C 1994. [DOI: 10.1107/s0108270193012545] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Ribár B, Stanković S, Mészáros C, Miljković D, Pejanović V, Petrović J. Structure of 3-methoxy-6α,17β-dihydroxyestra-1,3,5(10)-trien-7-one oxime. Acta Crystallogr C 1993. [DOI: 10.1107/s0108270192003007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Morović M, Dzelalija B, Novaković S, Stanković S, Dujella J. Acute renal failure as the main complication of acute infection with Coxiella burnetii. Nephron Clin Pract 1993; 64:335. [PMID: 8321379 DOI: 10.1159/000187348] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
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Stanković S, Stefanović A, Bruvo M, Altomare A. D-Secoestrone derivatives. II. 16-Cyano-3-methoxy-16,17-secoestra-1,3,5(10)-trien-17-yl p-toluenesulfonate. Acta Crystallogr C 1992. [DOI: 10.1107/s0108270192006450] [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: 11/10/2022] Open
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Stanković S, Petrović J, Miljković D, Pejanović V, Kovačević R, Stefanović A, Bruvo M. Structures of some new D-secoestrone derivatives. Acta Crystallogr C 1992. [DOI: 10.1107/s0108270191014063] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Stanković S, Lazar D, Miljković D, Gaši K, Sakač M, Courseille C. Structure and crystallization pattern of (20S)-3β,20-dihydroxy-20-(2-pyridyl)-21-norallopregn-16-ene with water molecules. Acta Crystallogr C 1992. [DOI: 10.1107/s0108270191009034] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Stanković S, Argay G, Tabaković I, Gunić E. Structure of p-(N,N-dimethylamino)phenyl 1,2,4-triazol-1-yl ketone p-nitrophenylhydrazone. Acta Crystallogr C 1991. [DOI: 10.1107/s0108270190009222] [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: 11/11/2022] Open
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