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Kovačević M, Sokić D, Ristić A, Berisavac I, Ercegovac M, Milićević O, Vojvodić N. Familial occurrence of seizure disorders across MRI defined structural focal epilepsy etiology. J Clin Neurosci 2024; 123:15-22. [PMID: 38508018 DOI: 10.1016/j.jocn.2024.03.010] [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] [Received: 10/29/2023] [Revised: 03/10/2024] [Accepted: 03/13/2024] [Indexed: 03/22/2024]
Abstract
BACKGROUND Previous studies have established familial occurrence of epilepsy and seizure disorders and early age of epilepsy onset as predictors of genetic epilepsy, but have not evaluated the rate of their occurrence in patients with different epilepsy etiology. Our study determines the distribution of familial occurrence and age of epilepsy onset across structural focal epilepsy (FE) etiology in a large FE cohort. METHODS Records of 1354 consecutive patients evaluated for epilepsy and seizure disorders in The Neurology Clinic, University Clinical Center of Serbia from 2008 to 2019 were screened for FE. Structural etiology, lobar diagnosis, familial occurrence, and age at epilepsy onset were determined. Patients with a. nonlesional focal epilepsy (NLFE), b. hippocampal sclerosis (HS) and c. congenital or perinatal etiology (CPE) were classified as NAFE, while patients with an identified acquired focal epilepsy (AFE) constituted the control group. RESULTS We identified 965 patients with FE, 329 (34.1 %) with NLFE, 213 (22.1 %) with HS, 174 (18.0 %) with CPE and 249 (25.8 %) with AFE. Familial occurrence was identified in 160 (16.6 %), 19.1 % of patients with NAFE and 9.2 % of AFE (p = 0.003). Patients with NAFE had a younger age of epilepsy onset (13 vs. 18 years, p < 0.001). The highest proportion of familial occurrence was found in patients with NLFE (23.7 %), while the youngest median age of epilepsy onset was identified in patients with HS (12 years) and CPE (11 years). CONCLUSION Patients with NAFE frequently have familial occurrence of epilepsy and have an earlier age of epilepsy onset than patients with AFE.
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Affiliation(s)
- Maša Kovačević
- Neurology Clinic, University Clinical Center of Serbia, University of Belgrade Faculty of Medicine, Serbia; Faculty of Medicine, University of Belgrade, Serbia.
| | - Dragoslav Sokić
- Neurology Clinic, University Clinical Center of Serbia, University of Belgrade Faculty of Medicine, Serbia; Faculty of Medicine, University of Belgrade, Serbia
| | - Aleksandar Ristić
- Neurology Clinic, University Clinical Center of Serbia, University of Belgrade Faculty of Medicine, Serbia; Faculty of Medicine, University of Belgrade, Serbia
| | - Ivana Berisavac
- Neurology Clinic, University Clinical Center of Serbia, University of Belgrade Faculty of Medicine, Serbia; Faculty of Medicine, University of Belgrade, Serbia
| | - Marko Ercegovac
- Neurology Clinic, University Clinical Center of Serbia, University of Belgrade Faculty of Medicine, Serbia; Faculty of Medicine, University of Belgrade, Serbia
| | | | - Nikola Vojvodić
- Neurology Clinic, University Clinical Center of Serbia, University of Belgrade Faculty of Medicine, Serbia; Faculty of Medicine, University of Belgrade, Serbia
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Kovačević M, Milićević O, Branković M, Janković M, Novaković I, Sokić D, Ristić A, Shamsani J, Vojvodić N. Novel variants in established epilepsy genes in focal epilepsy. Seizure 2023; 110:146-152. [PMID: 37390664 DOI: 10.1016/j.seizure.2023.06.005] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 05/30/2023] [Accepted: 06/06/2023] [Indexed: 07/02/2023] Open
Abstract
INTRODUCTION Next generation sequencing (NGS) has greatly expanded our understanding of genetic contributors in multiple epilepsy syndromes, including focal epilepsy. Describing the genetic architecture of common syndromes promises to facilitate the diagnostic process as well as aid in the identification of patients who stand to benefit from genetic testing, but most studies to date have been limited to examining children or adults with intellectual disability. Our aim was to determine the yield of targeted sequencing of 5 established epilepsy genes (DEPDC5, LGI1, SCN1A, GRIN2A, and PCHD19) in an extensively phenotyped cohort of focal epilepsy patients with normal intellectual function or mild intellectual disability, as well as describe novel variants and determine the characteristics of variant carriers. PATIENTS AND METHODS Targeted panel sequencing was performed on 96 patients with a strong clinical suspicion of genetic focal epilepsy. Patients had previously gone through a comprehensive diagnostic epilepsy evaluation in The Neurology Clinic, University Clinical Center of Serbia. Variants of interest (VOI) were classified using the American College of Medical Genetics and the Association for Molecular Pathology criteria. RESULTS Six VOI in eight (8/96, 8.3%) patients were found in our cohort. Four likely pathogenic VOI were determined in six (6/96, 6.2%) patients, two DEPDC5 variants in two patients, one SCN1A variant in two patients and one PCDH19 variant in two patients. One variant of unknown significance (VUS) was found in GRIN2A in one (1/96, 1.0%) patient. Only one VOI in GRIN2A was classified as likely benign. No VOI were detected in LGI1. CONCLUSION Sequencing of only five known epilepsy genes yielded a diagnostic result in 6.2% of our cohort and revealed multiple novel variants. Further research is necessary for a better understanding of the genetic basis in common epilepsy syndromes in patients with normal intellectual function or mild intellectual disability.
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Affiliation(s)
- Maša Kovačević
- Neurology Clinic, University Clinical Center of Serbia, Belgrade, Serbia; Faculty of Medicine, University of Belgrade, Belgrade, Serbia.
| | | | | | - Milena Janković
- Neurology Clinic, University Clinical Center of Serbia, Belgrade, Serbia
| | - Ivana Novaković
- Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - Dragoslav Sokić
- Neurology Clinic, University Clinical Center of Serbia, Belgrade, Serbia; Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - Aleksandar Ristić
- Neurology Clinic, University Clinical Center of Serbia, Belgrade, Serbia; Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | | | - Nikola Vojvodić
- Neurology Clinic, University Clinical Center of Serbia, Belgrade, Serbia; Faculty of Medicine, University of Belgrade, Belgrade, Serbia
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Kovačević M, Janković M, Branković M, Milićević O, Novaković I, Sokić D, Ristić A, Shamsani J, Vojvodić N. Novel GATOR1 variants in focal epilepsy. Epilepsy Behav 2023; 141:109139. [PMID: 36848747 DOI: 10.1016/j.yebeh.2023.109139] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 02/03/2023] [Accepted: 02/05/2023] [Indexed: 02/27/2023]
Abstract
INTRODUCTION Variants in GATOR1 genes are well established in focal epilepsy syndromes. A strong association of GATOR1 variants with drug-resistant epilepsy as well as an increased risk of sudden unexplained death in epilepsy warrants developing strategies to facilitate the identification of patients who could potentially benefit from genetic testing and precision medicine. We aimed to determine the yield of GATOR1 gene sequencing in patients with focal epilepsy typically referred for genetic testing, establish novel GATOR1 variants and determine clinical, electroencephalographic, and radiological characteristics of variant carriers. PATIENTS AND METHODS Ninety-six patients with clinical suspicion of genetic focal epilepsy with previous comprehensive diagnostic epilepsy evaluation in The Neurology Clinic, University Clinical Center of Serbia, were included in the study. Sequencing was performed using a custom gene panel encompassing DEPDC5, NPRL2, and NPRL3. Variants of interest (VOI) were classified according to criteria proposed by the American College of Medical Genetics and the Association for Molecular Pathology. RESULTS Four previously unreported VOI in 4/96 (4.2%) patients were found in our cohort. Three likely pathogenic variants were determined in 3/96 (3.1%) patients, one frameshift variant in DEPDC5 in a patient with nonlesional frontal lobe epilepsy, one splicogenic DEPDC5 variant in a patient with nonlesional posterior quadrant epilepsy, and one frameshift variant in NPRL2 in a patient with temporal lobe epilepsy associated with hippocampal sclerosis. Only one VOI, a missense variant in NPRL3, found in 1/96 (1.1%) patients, was classified as a variant of unknown significance. CONCLUSION GATOR1 gene sequencing was diagnostic in 3.1% of our cohort and revealed three novel likely pathogenic variants, including a previously unreported association of temporal lobe epilepsy with hippocampal sclerosis with an NPRL2 variant. Further research is essential for a better understanding of the clinical scope of GATOR1 gene-associated epilepsy.
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Affiliation(s)
- Maša Kovačević
- Neurology Clinic, University Clinical Center of Serbia, Serbia; Faculty of Medicine, University of Belgrade, Serbia.
| | - Milena Janković
- Neurology Clinic, University Clinical Center of Serbia, Serbia
| | | | | | | | - Dragoslav Sokić
- Neurology Clinic, University Clinical Center of Serbia, Serbia; Faculty of Medicine, University of Belgrade, Serbia
| | - Aleksandar Ristić
- Neurology Clinic, University Clinical Center of Serbia, Serbia; Faculty of Medicine, University of Belgrade, Serbia
| | | | - Nikola Vojvodić
- Neurology Clinic, University Clinical Center of Serbia, Serbia; Faculty of Medicine, University of Belgrade, Serbia
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Mandić J, Kosmač I, Kovačević M, Hodnik B, Hodnik Ž, Vrečer F, Gašperlin M, Perissutti B, Zvonar Pobirk A. Evaluation of solid carvedilol-loaded SMEDDS produced by the spray drying method and a study of related substances. Int J Pharm 2021; 605:120783. [PMID: 34111547 DOI: 10.1016/j.ijpharm.2021.120783] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 05/16/2021] [Accepted: 06/03/2021] [Indexed: 11/16/2022]
Abstract
In this study, various formulations of solidified carvedilol-loaded SMEDDS with high SMEDDS loading (up to 67% w/w) were produced with the spray drying process using various porous silica-based carriers. The process yield was improved with higher atomization gas flow rate during the spray drying process and with prolonged mixing time of dispersion of liquid SMEDDS and solid porous carriers prior to the spray drying process. Depending on the choice of the carrier and the SMEDDS:carrier ratio in solid SMEDDS, different drug loading, self-microemulsifying properties, drug release rates, and released drug fractions were obtained. The products exhibited fast drug release due to preserved self-microemulsifying properties and the absence of crystalline carvedilol, which was confirmed with XRD and Raman mapping. A decrease in drug content during the stability study was observed and investigated. This was at least partially attributed to the chemical degradation of the drug. Key degradation products determined by the LC-MS method were amides formed by in situ reaction of carvedilol with fatty acids present in the oily phase of SMEDDS.
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Affiliation(s)
- J Mandić
- University of Ljubljana, Faculty of Pharmacy, Aškerčeva cesta 7, 1000 Ljubljana, Slovenia; Krka, d.d, Novo mesto, Šmarješka cesta 6, 8000 Novo mesto, Slovenia
| | - I Kosmač
- University of Ljubljana, Faculty of Pharmacy, Aškerčeva cesta 7, 1000 Ljubljana, Slovenia; Krka, d.d, Novo mesto, Šmarješka cesta 6, 8000 Novo mesto, Slovenia
| | - M Kovačević
- University of Ljubljana, Faculty of Pharmacy, Aškerčeva cesta 7, 1000 Ljubljana, Slovenia
| | - B Hodnik
- Krka, d.d, Novo mesto, Šmarješka cesta 6, 8000 Novo mesto, Slovenia
| | - Ž Hodnik
- Krka, d.d, Novo mesto, Šmarješka cesta 6, 8000 Novo mesto, Slovenia
| | - F Vrečer
- University of Ljubljana, Faculty of Pharmacy, Aškerčeva cesta 7, 1000 Ljubljana, Slovenia; Krka, d.d, Novo mesto, Šmarješka cesta 6, 8000 Novo mesto, Slovenia
| | - M Gašperlin
- University of Ljubljana, Faculty of Pharmacy, Aškerčeva cesta 7, 1000 Ljubljana, Slovenia
| | - B Perissutti
- University of Trieste, Dept. of Chemical and Pharmaceutical Sciences, P.le Europa 1, Trieste, Italy
| | - A Zvonar Pobirk
- University of Ljubljana, Faculty of Pharmacy, Aškerčeva cesta 7, 1000 Ljubljana, Slovenia.
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Petrović M, Milovančev A, Kovačević M, Miljković T, Ilić A, Stojšić-Milosavljević A, Golubović M. Impact of COVID-19 outbreak on hospital admissions and outcome of acute coronary syndromes in a single high-volume centre in southeastern Europe. Neth Heart J 2021; 29:230-236. [PMID: 33704668 PMCID: PMC7950419 DOI: 10.1007/s12471-021-01554-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [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] [Accepted: 02/17/2021] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND As coronavirus disease 2019 (COVID-19) has reached pandemic status, authors from the most severely affected countries have reported reduced rates of hospital admissions for patients with acute coronary syndrome (ACS). AIM The aim of the present study was to investigate the influence of the COVID-19 outbreak on hospital admissions and outcomes in ACS patients in a single high-volume centre in southeastern Europe. METHODS This retrospective observational study aimed to investigate the number of hospital admissions for ACS, clinical findings at admission, length of hospitalisation, major complications and in-hospital mortality during the COVID-19 outbreak and to compare the data with the same parameters during an equivalent time frame in 2019. For the ST-elevated myocardial infarction (STEMI) subgroup of patients, changes in ischaemic times were analysed as well. RESULTS There was a significant reduction of 44.3% in the number of patients admitted for ACS during the COVID-19 outbreak when compared with the same period in 2019 (151 vs 271; 95% confidence interval 38.4-50.2, p < 0.01) with a higher mortality rate (13.2% vs 7.2%, p = 0.03). In 2020, patients with non-ST-elevated myocardial infarction presented more often with acute heart failure (3.3% vs 0.7%, p = 0.04). During the COVID-19 outbreak, we observed increases in the total ischaemic time (303 ± 163.4 vs 200.8 ± 156.8 min, p < 0.05) and door-to-balloon time (69.2 ± 58.4 vs 50.5 ± 31.3 min, p < 0.01) in STEMI patients. CONCLUSIONS These findings should increase the awareness of morbidity and mortality related to missed or delayed treatment of ACS among the public and the healthcare services.
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Affiliation(s)
- M Petrović
- Faculty of Medicine, University of Novi Sad, Novi Sad, Serbia
- Institute of Cardiovascular Diseases of Vojvodina, Sremska Kamenica, Serbia
| | - A Milovančev
- Faculty of Medicine, University of Novi Sad, Novi Sad, Serbia.
- Institute of Cardiovascular Diseases of Vojvodina, Sremska Kamenica, Serbia.
| | - M Kovačević
- Faculty of Medicine, University of Novi Sad, Novi Sad, Serbia
- Institute of Cardiovascular Diseases of Vojvodina, Sremska Kamenica, Serbia
| | - T Miljković
- Faculty of Medicine, University of Novi Sad, Novi Sad, Serbia
- Institute of Cardiovascular Diseases of Vojvodina, Sremska Kamenica, Serbia
| | - A Ilić
- Faculty of Medicine, University of Novi Sad, Novi Sad, Serbia
- Institute of Cardiovascular Diseases of Vojvodina, Sremska Kamenica, Serbia
| | - A Stojšić-Milosavljević
- Faculty of Medicine, University of Novi Sad, Novi Sad, Serbia
- Institute of Cardiovascular Diseases of Vojvodina, Sremska Kamenica, Serbia
| | - M Golubović
- Faculty of Medicine, University of Novi Sad, Novi Sad, Serbia
- Institute of Cardiovascular Diseases of Vojvodina, Sremska Kamenica, Serbia
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Kovačević M. On the Maximum Entropy of a Sum of Independent Discrete Random Variables. Theory Probab Appl 2021. [DOI: 10.1137/s0040585x97t99054x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Sokić N, Ristić AJ, Bukumirić Z, Vojvodić N, Kovačević M, Sokić D. Validation of the Serbian version of the Liverpool Adverse Events Profile of antiseizure therapy in patients with epilepsy. Epilepsy Behav 2020; 111:107309. [PMID: 32698103 DOI: 10.1016/j.yebeh.2020.107309] [Citation(s) in RCA: 3] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Revised: 06/26/2020] [Accepted: 06/28/2020] [Indexed: 10/23/2022]
Abstract
The Liverpool Adverse Event Profile (LAEP) is a useful instrument in assessing the consequences of adverse events in patients using antiseizure medication. The LAEP scale has been validated in several languages to date. The aim of our study was to validate the LAEP scale in the Serbian language (SVLAEP). Validation of the SVLAEP scale was conducted by translating the original English version into the Serbian language and backtranslated into the English language. The translation was accepted when the two versions of the text were compatible. The questionnaire is then given to a group of patients with epilepsy treated with a stable dose of antiseizure medication. For the assessment of the quality of life and depression, we used the Serbian version of the Quality of Life in Epilepsy Inventory-31 (SVQOLIE-31) and the Serbian version of the Neurological Disorders Depression Inventory for Epilepsy (SVNDDI-E). From a total of 166 patients, 118 patients were included, and the remaining 48 were excluded because of other comorbidities and using other psychotropic drugs. Internal consistency (Cronbach's α = 0.87) and test-retest reliability (intraclass correlation coefficient (ICC) = 0.80) were satisfactory. The SVLAEP and SVQOLIE-31 had a strong negative statistical correlation (rs = -0.73; p < 0.001). The SVLAEP and SVNDDI-E final scores had a positive moderate correlation (rs = 0.52; p < 0.001). A moderate negative statistical correlation was found between SVNDDI-E and SVQOLIE-31 (rs = -0.56; p < 0.001). Our study showed that the LAEP scale is a useful indicator for the frequency of the adverse events in antiepileptic drug (AED) usage, despite a minor overlap with the symptoms of depression.
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Affiliation(s)
- Nataša Sokić
- Faculty of Medicine, University in Belgrade, Serbia
| | | | - Zoran Bukumirić
- Medical Statistics and Informatics, Faculty of Medicine, University of Belgrade, Serbia
| | - Nikola Vojvodić
- Clinic for Neurology, Faculty of Medicine, University in Belgrade, Serbia
| | - Maša Kovačević
- Clinic for Neurology, Faculty of Medicine, University in Belgrade, Serbia
| | - Dragoslav Sokić
- Clinic for Neurology, Faculty of Medicine, University in Belgrade, Serbia
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Kovačević M, Sokić D, Ristić AJ, Baščarević V, Đukić T, Pejović A, Vojvodić N. Focal-to-bilateral motor seizures in temporal lobe epilepsy during video-EEG monitoring: effects on surgical outcome. Acta Neurol Belg 2020:10.1007/s13760-020-01452-w. [PMID: 32740874 DOI: 10.1007/s13760-020-01452-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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Accepted: 07/23/2020] [Indexed: 09/29/2022]
Abstract
The aim of this study was to determine whether the occurrence of focal-to-bilateral motor seizures in the course of partial drug withdrawal during video-EEG monitoring (FTBMS-M) had a predictive value for seizure recurrence in surgically treated patients with mesial temporal lobe epilepsy (MTLE). We analyzed the outcomes of 59 patients who underwent temporal lobe resection and had postoperative follow-up from 6 to 58 months. In total, 48 out of 59 patients were rendered seizure free (81.4%). We analyzed seizure recurrence after surgery with reference to: (i) occurrence of seizures after partial drug withdrawal during video-EEG monitoring (FTBMS-M); (ii) history of secondarily generalized seizures during antiepileptic drug treatment prior to presurgical evaluation (FTBMS-H) and (iii) other possible confounding factors (sex, age, epilepsy duration, side of surgery, presence of hippocampal sclerosis, and history of febrile seizures). We found no differences in the frequency of seizure recurrences between patients with FTBMS-M and patients without FTBMS-M (4/20 vs. 7/39; p = 0.848). Conversely, the frequency of seizure recurrence was significantly higher among the patients with FTBMS-H than among the patients without FTBMS-H (7/20 vs. 4/39; p = 0.021). The predictive value of FTBMS-H for postoperative seizure recurrence was confirmed in logistic regression analysis. We found a statistically significant influence of FTBMS-H on poor outcome after surgery, but not of FTBMS-M or other confounding variables, which suggests that withdrawal seizures do not affect post-surgical seizure control.
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Affiliation(s)
- Maša Kovačević
- Neurology Clinic, Clinical Center of Serbia, Dr. Subotić Street 6, 11 000, Belgrade, Serbia.
| | - Dragoslav Sokić
- Neurology Clinic, Clinical Center of Serbia, Dr. Subotić Street 6, 11 000, Belgrade, Serbia
- Faculty of Medicine, University of Belgrade, Dr. Subotić Street 8, 11 000, Belgrade, Serbia
| | - Aleksandar J Ristić
- Neurology Clinic, Clinical Center of Serbia, Dr. Subotić Street 6, 11 000, Belgrade, Serbia
- Faculty of Medicine, University of Belgrade, Dr. Subotić Street 8, 11 000, Belgrade, Serbia
| | - Vladimir Baščarević
- Faculty of Medicine, University of Belgrade, Dr. Subotić Street 8, 11 000, Belgrade, Serbia
- Clinic for Neurosurgery, Clinical Center of Serbia, Kosta Todorović Street 4, 11 000, Belgrade, Serbia
| | - Tijana Đukić
- Neurology Clinic, Clinical Center of Serbia, Dr. Subotić Street 6, 11 000, Belgrade, Serbia
| | - Aleksa Pejović
- Neurology Clinic, Clinical Center of Serbia, Dr. Subotić Street 6, 11 000, Belgrade, Serbia
| | - Nikola Vojvodić
- Neurology Clinic, Clinical Center of Serbia, Dr. Subotić Street 6, 11 000, Belgrade, Serbia
- Faculty of Medicine, University of Belgrade, Dr. Subotić Street 8, 11 000, Belgrade, Serbia
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Despotović V, Kordić B, Kovačević M, Petrović S, Jović B. Investigation of N H⋯O interactions in N-monosubstituted caproamide – Ether systems: FT–IR and FT–NIR spectroscopic study. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2018.12.081] [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: 12/01/2022]
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Jović B, Ćirić V, Kovačević M, Šeremešić S, Kordić B. Empirical equation for preliminary assessment of soil texture. Spectrochim Acta A Mol Biomol Spectrosc 2019; 206:506-511. [PMID: 30176426 DOI: 10.1016/j.saa.2018.08.039] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Revised: 08/20/2018] [Accepted: 08/22/2018] [Indexed: 06/08/2023]
Abstract
In this paper, for the first time type and texture of northern Serbian soils were examined using DRIFT spectroscopy. It was investigated whether it is possible to use the specular reflection of the quartz band for the purpose of the preliminary quantitative determination of texture properties. Investigation is conducted on the five most common soil types in Vojvodina: Arenosols, Fluvisols, Chernozems, Vertisols and Solonetz. Spectra were obtained using diffuse reflectance (DRIFT) technique in mid-IR. Spectral characteristics for five characteristic soil types in this region were determined. Certain regularities were observed regarding inorganic bands and main relations between these inorganic components and the texture parameters were determined. The empirical equation for the rough preliminary estimation of the soil texture was determined based on the absorbance values on the 2228 and 1211 cm-1.
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Affiliation(s)
- B Jović
- University of Novi Sad, Faculty of Sciences, Trg Dositeja Obradovića 3, 21000 Novi Sad, Serbia.
| | - V Ćirić
- University of Novi Sad, Faculty of Agriculture, Trg Dositeja Obradovića 8, 21000 Novi Sad, Serbia
| | - M Kovačević
- University of Novi Sad, Faculty of Sciences, Trg Dositeja Obradovića 3, 21000 Novi Sad, Serbia
| | - S Šeremešić
- University of Novi Sad, Faculty of Agriculture, Trg Dositeja Obradovića 8, 21000 Novi Sad, Serbia
| | - B Kordić
- University of Novi Sad, Faculty of Sciences, Trg Dositeja Obradovića 3, 21000 Novi Sad, Serbia
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Kordić B, Kovačević M, Sloboda T, Vidović A, Jović B. FT-IR and NIR spectroscopic investigation of hydrogen bonding in indole-ether systems. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2017.05.035] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Rotim K, Sajko T, Škoro I, Kovačević M, Koprek I. The Impact of Alcohol Intoxication and Craniocerebral Injury Type on Treatment Outcome for Patients Operated with Craniocerebral Injury. J Neurol Surg A Cent Eur Neurosurg 2015. [DOI: 10.1055/s-0035-1566437] [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: 10/22/2022]
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Ristić AJ, Sokić D, Baščarević V, Spasić S, Vojvodić N, Savić S, Raičević S, Kovačević M, Savić D, Spasojević I. Metals and electrolytes in sclerotic hippocampi in patients with drug-resistant mesial temporal lobe epilepsy. Epilepsia 2014; 55:e34-e37. [DOI: 10.1111/epi.12593] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/10/2014] [Indexed: 11/26/2022]
Affiliation(s)
- Aleksandar J. Ristić
- Center for Epilepsy and Sleep Disorders; Neurology Clinic; Clinical Center of Serbia; Belgrade Serbia
| | - Dragoslav Sokić
- Center for Epilepsy and Sleep Disorders; Neurology Clinic; Clinical Center of Serbia; Belgrade Serbia
| | | | - Snežana Spasić
- Department of Chemistry; Institute of Chemistry, Technology and Metallurgy; University of Belgrade; Belgrade Serbia
| | - Nikola Vojvodić
- Center for Epilepsy and Sleep Disorders; Neurology Clinic; Clinical Center of Serbia; Belgrade Serbia
| | - Slobodan Savić
- Institute of Forensic Medicine; Medical School; University of Belgrade; Belgrade Serbia
| | - Savo Raičević
- Institute for Neurosurgery; Clinical Center of Serbia; Belgrade Serbia
| | - Maša Kovačević
- Center for Epilepsy and Sleep Disorders; Neurology Clinic; Clinical Center of Serbia; Belgrade Serbia
| | - Danijela Savić
- Department of Neurobiology; Institute for Biological Research ‘Siniša Stanković’; University of Belgrade; Belgrade Serbia
| | - Ivan Spasojević
- Life Sciences Department; Institute for Multidisciplinary Research; University of Belgrade; Belgrade Serbia
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Kovačević M, Đurić Z, Jović J, Perković G, Lolić B, Hrnčić S, Toševski I, Delić D. First Report of Stolbur Phytoplasma Associated with Maize Redness Disease of Maize in Bosnia and Herzegovina. Plant Dis 2014; 98:418. [PMID: 30708409 DOI: 10.1094/pdis-04-13-0371-pdn] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Maize redness (MR), caused by stolbur phytoplasma (16SrXII-A, 'Candidatus phytoplasma solani') and vectored by the cixiid planthopper Reptalus panzeri (Löw), is a severe and emerging disease of maize in southeastern Europe (2). Symptoms of MR include midrib, leaf, and stalk reddening, followed by desiccation of the entire plant, abnormal ear development, and incomplete kernel set. MR may cause significant economic losses (2). During 2010, 2011, and 2012, the presence of MR-like symptoms on maize accompanied by significant yield losses were frequently observed in maize fields in the Semberija region of northeastern Bosnia and Herzegovina. From mid-June to early July, potential vectors were collected using mouth-aspirators from maize plants in fields at three locations in the Semberija region where MR-like symptoms were previously observed. At the end of July, symptomatic maize plants were collected from six fields in the same region for phytoplasma identification. In addition, we sampled asymptomatic johnsongrass (Sorghum halepense L.), bindweed (Convolvulus arvensis L.), and volunteer wheat (Triticum aestivum L.) in areas adjacent to maize fields with MR-like symptoms, as potential phytoplasma reservoirs (2,3). A total of 49 plants (38 maize, 6 johnsongrass, 3 bindweed, and 2 wheat) and 43 R. panzeri were tested for the presence of stolbur phytoplasma. Leaves of four maize seedlings, grown in insect-proof greenhouse conditions, were used as controls. Total DNA was extracted from roots of each plant and R. panzeri using the CTAB methods (2). Initial phytoplasma detection was conducted on 16S rRNA gene using nested PCR assay with phytoplasma universal primers P1/P7 and F2n/R2 (4). Subsequently, all phytoplasma positive samples were retested employing stolbur-specific Stol11 protocol with the f2r/f3r2 primer set (1). Molecular characterization of identified phytoplasmas was performed by PCR-RFLP analysis of the tuf gene (3) and by sequence analyses of the 16S rRNA nested PCR products (GenBank Accession No. KC852868). All samples that tested positive on 16S rRNA gene using phytoplasma generic primers gave positive reaction in assays with stolbur-specific primers. Stolbur phytoplasma was identified in 36 of 49 plant samples (34 of 38 symptomatic maize plants and in 2 of 6 johnsongrass) and in 2 of 43 R. panzeri individuals. None of the control plants, bindweed, or wheat samples were positive for the presence of any phytoplasma. Tuf gene RFLP analyses enabled affiliation of all isolates to the stolbur type tuf-b. Comparison of the 16S rRNA sequence using BLAST analyses further confirmed identification of the phytoplasmas as being 'Candidatus phytoplasma solani.' The obtained sequence showed 100% identity with 'Candidatus phytoplasma solani' from corn in Serbia (JQ730750). These data clearly demonstrated association of stolbur phytoplasma with MR symptoms on maize in Semberija, which represents the first report of the MR disease and stolbur phytoplasma in maize, R. panzeri, and johnsongrass in Bosnia and Herzegovina. In the Semberija region, maize-wheat crop rotation is a traditional practice, which is a key factor for MR occurrence and persistence (2). References: (1) D. Clair et al. Vitis 42:151, 2003. (2) J. Jović et al. Phytopathology 99:1053, 2009. (3) M. Langer and M. Maixner. Vitis 43, 191, 2004. (4) I. M. Lee et al. Int. J. Syst. Bacteriol. 48:1153, 1998.
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Affiliation(s)
- M Kovačević
- University of Banjaluka, Faculty of Agriculture, Bulevar vojvode Petra Bojovića 1A, 78000 Banjaluka, Bosnia and Herzegovina
| | - Z Đurić
- University of Banjaluka, Faculty of Agriculture, Bulevar vojvode Petra Bojovića 1A, 78000 Banjaluka, Bosnia and Herzegovina
| | - J Jović
- Institute for Plant Protection and Environment, Department of Plant Pests, Banatska 33, 11800 Zemun, Serbia
| | - G Perković
- University of East Sarajevo, Faculty of Agriculture, Vuka Karadžića 30, 71123 East Sarajevo, Bosnia and Herzegovina
| | - B Lolić
- University of Banjaluka, Faculty of Agriculture, Bulevar vojvode Petra Bojovića 1A, 78000 Banjaluka, Bosnia and Herzegovina
| | - S Hrnčić
- University of Banjaluka, Faculty of Agriculture, Bulevar vojvode Petra Bojovića 1A, 78000 Banjaluka, Bosnia and Herzegovina, and University of Montenegro, Biotechnical Faculty, Centre for Plant Protection, Mihaila Lalića 1, 81000 Podgorica, Montenegro
| | - I Toševski
- Institute for Plant Protection and Environment, Department of Plant Pests, Banatska 33, 11080 Zemun, Serbia, and CABI, 1 Rue des Grillons, 2800 Delémont, Switzerland
| | - D Delić
- University of Banjaluka, Faculty of Agriculture, Bulevar vojvode Petra Bojovića 1A, 78000 Banjaluka, Bosnia and Herzegovina
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Janković S, Sokić D, Vojvodić N, Ristić A, Kovačević M. 20. Catathrenia: A disease with central sleep apnea accompanied by a sound. Clin Neurophysiol 2013. [DOI: 10.1016/j.clinph.2012.12.029] [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: 10/26/2022]
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Zidverc-Trajković JJ, Kovačević M, Jovanović D, Prokopljević-Bugarski C, Beslać-Bumbaširević L. 5-07-43 Prognosis in patients with intracerebral haemathomas — Prospective study in 144 patients. J Neurol Sci 1997. [DOI: 10.1016/s0022-510x(97)86280-6] [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: 11/16/2022]
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Beslać-Bumbaširević L, Bošković D, Tomin D, Čolović M, Kovačević M, Bumbaširević V. 1-39-01 Nervous system involvement in acute leukemia of adults. J Neurol Sci 1997. [DOI: 10.1016/s0022-510x(97)85119-2] [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: 11/24/2022]
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Prokopljević C, Kovačević M, Jovanović D, Bumbaširević L, Trajković J. 4-26-01 Dynamics of neurological and biochemical disorders in acute intermittent porphyria (AIP) — A study of 120 cases. J Neurol Sci 1997. [DOI: 10.1016/s0022-510x(97)86059-5] [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: 10/18/2022]
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Jovanović DR, Kovačević M, Zidverc-Trajković J, Beslać-Bumbaširević L, Prokopljević-Bugarski C, Pećić O. 5-07-11 The causes of brain infarction in young adults. J Neurol Sci 1997. [DOI: 10.1016/s0022-510x(97)86245-4] [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: 11/25/2022]
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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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Balaban A, Brunvoll J, Cioslowski J, Cyvin BN, Cyvin SJ, Gutman I, Wenchen H, Wenjie H, Knop J, Kovačević M, Müller WR, Szymanski K, Tošić R, Trinajstić N. Enumeration of Benzenoid and Coronoid Hydrocarbons. ACTA ACUST UNITED AC 1987. [DOI: 10.1515/zna-1987-0817] [Citation(s) in RCA: 56] [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: 11/15/2022]
Abstract
This is a report on the present status of computer-aided enumeration and classification of benzenoids and coronoids (polyhexes). The existing data from previous works are displayed in comprehensive tables. Numerous data from papers in press are included, as well as original contributions.
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Affiliation(s)
| | | | | | | | | | - I. Gutman
- 5University of Kragujevac, Yugoslavia
| | - He Wenchen
- 6Hebei Chemical Engineering Institute, Shijiazhuang, PR China
| | - He Wenjie
- 7Hebei Academy of Sciences, Shijiazhuang, PR China
| | - J.V. Knop
- 8Computer Centre, The University of Düsseldorf, FR Germany
| | | | - W. R. Müller
- 8Computer Centre, The University of Düsseldorf, FR Germany
| | - K. Szymanski
- 8Computer Centre, The University of Düsseldorf, FR Germany
| | - R. Tošić
- 9University of Novi Sad, Yugoslavia
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