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Mostovoy A, Bekeshev A, Brudnik S, Yakovlev A, Shcherbakov A, Zhanturina N, Zhumabekova A, Yakovleva E, Tseluikin V, Lopukhova M. Studying the Structure and Properties of Epoxy Composites Modified by Original and Functionalized with Hexamethylenediamine by Electrochemically Synthesized Graphene Oxide. Nanomaterials (Basel) 2024; 14:602. [PMID: 38607136 PMCID: PMC11013947 DOI: 10.3390/nano14070602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 03/23/2024] [Accepted: 03/27/2024] [Indexed: 04/13/2024]
Abstract
In this study, we used multilayer graphene oxide (GO) obtained by anodic oxidation of graphite powder in 83% sulfuric acid. The modification of GO was carried out by its interaction with hexamethylenediamine (HMDA) according to the mechanism of nucleophilic substitution between the amino group of HMDA (HMDA) and the epoxy groups of GO, accompanied by partial reduction of multilayer GO and an increase in the deformation of the carbon layers. The structure and properties of modified HMDA-GO were characterized using research methods such as scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction spectroscopy and Raman spectroscopy. The conducted studies show the effectiveness of using HMDA-OG for modifying epoxy composites. Functionalizing treatment of GO particles helps reduce the free surface energy at the polymer-nanofiller interface and increase adhesion, which leads to the improvement in physical and mechanical characteristics of the composite material. The results demonstrate an increase in the strength and elastic modulus in bending by 48% and 102%, respectively, an increase in the impact strength by 122%, and an increase in the strength and elastic modulus in tension by 82% and 47%, respectively, as compared to the pristine epoxy composite which did not contain GO-HMDA. It has been found that the addition of GO-HMDA into the epoxy composition initiates the polymerization process due to the participation of reactive amino groups in the polymerization reaction, and also provides an increase in the thermal stability of epoxy nanocomposites.
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Affiliation(s)
- Anton Mostovoy
- Laboratory of Modern Methods of Research of Functional Materials and Systems, Yuri Gagarin State Technical University of Saratov, Polytechnichskaya Str., 77, 410054 Saratov, Russia
| | - Amirbek Bekeshev
- Laboratory of Polymer Composites, K. Zhubanov Aktobe Regional State University, Aliya Moldagulova Avenue 34, Aktobe 030000, Kazakhstan;
| | - Sergey Brudnik
- Department of Chemistry and Chemical Technology of Materials, Yuri Gagarin State Technical University of Saratov, Polytechnichskaya Str., 77, 410054 Saratov, Russia; (S.B.); (A.Y.)
| | - Andrey Yakovlev
- Department of Chemistry and Chemical Technology of Materials, Yuri Gagarin State Technical University of Saratov, Polytechnichskaya Str., 77, 410054 Saratov, Russia; (S.B.); (A.Y.)
| | - Andrey Shcherbakov
- Laboratory of Support and Maintenance of the Educational Process, Yuri Gagarin State Technical University of Saratov, Polytechnichskaya Str., 77, 410054 Saratov, Russia
| | - Nurgul Zhanturina
- Department of Physics, K. Zhubanov Aktobe Regional State University, Aliya Moldagulova Avenue 34, Aktobe 030000, Kazakhstan;
| | - Arai Zhumabekova
- Department of Chemistry, Chemical Technology and Ecology, Kazakh University of Technology and Business, Kayym Mukhamedkhanov Str., Building 37 A, Astana 010000, Kazakhstan;
| | - Elena Yakovleva
- Department of Ecology and Technosphere Safety, Yuri Gagarin State Technical University of Saratov, Polytechnichskaya Str., 77, 410054 Saratov, Russia;
| | - Vitaly Tseluikin
- Department of Technology and Equipment for Chemical, Oil and Gas and Food Industries, Yuri Gagarin State Technical University of Saratov, Polytechnichskaya Str., 77, 410054 Saratov, Russia;
| | - Marina Lopukhova
- Department of Economics and Humanitarian Sciences, Yuri Gagarin State Technical University of Saratov, Polytechnichskaya Str., 77, 410054 Saratov, Russia;
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Kofeynikova O, Alekseeva D, Vershinina T, Fetisova S, Peregudina O, Kovalchuk T, Yakovleva E, Sokolnikova P, Klyushina A, Chueva K, Kostareva A, Pervunina T, Vasichkina E. The phenotypic and genetic features of arrhythmogenic cardiomyopathy in the pediatric population. Front Cardiovasc Med 2023; 10:1216976. [PMID: 37781308 PMCID: PMC10541206 DOI: 10.3389/fcvm.2023.1216976] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Accepted: 09/04/2023] [Indexed: 10/03/2023] Open
Abstract
Introduction The present study aimed to describe the phenotypic features and genetic spectrum of arrhythmogenic cardiomyopathy (ACM) presented in childhood and test the validity of different diagnostic approaches using Task Force Criteria 2010 (TFC) and recently proposed Padua criteria. Patients and methods Thirteen patients (mean age at diagnosis 13.6 ± 3.7 years) were enrolled using "definite" or "borderline" diagnostic criteria of ACM according to the TFC 2010 and the Padua criteria in patients <18 years old. Clinical data, including family history, 12-lead electrocardiogram (ECG), signal-averaged ECG, 24-h Holter monitoring, imaging techniques, genetic testing, and other relevant information, were collected. Results All patients were classified into three variants: ACM of right ventricle (ACM-RV; n = 6, 46.1%), biventricular ACM (ACM-BV; n = 3, 23.1%), and ACM of left ventricle (ACM-LV; n = 4, 30.8%). The most common symptoms at presentations were syncope (n = 6; 46.1%) and palpitations (n = 5; 38.5%). All patients had more than 500 premature ventricular contractions per day. Ventricular tachycardia was reported in 10 patients (76.9%), and right ventricular dilatation was registered in 8 patients (61.5%). An implantable cardiac defibrillator was implanted in 61.5% of cases, and three patients with biventricular involvement underwent heart transplantation. Desmosomal mutations were identified in 8 children (53.8%), including four patients with PKP2 variants, two with DSP variants, one with DSG2 variant, and one with JUP. Four patients carried compound heterozygous variants in desmosomal genes associated with left ventricular involvement. Conclusion Arrhythmias and structural heart disease, such as chamber dilatation, should raise suspicion of different ACM phenotypes. Diagnosis of ACM might be difficult in pediatric patients, especially for ACM-LV and ACM-BV forms. Our study confirmed that using "Padua criteria" in combination with genetic testing improves the diagnostic accuracy of ACM in children.
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Affiliation(s)
- Olga Kofeynikova
- World-Class Research Centre for Personalized Medicine, Almazov National Medical Research Centre, Saint Petersburg, Russia
| | - Daria Alekseeva
- World-Class Research Centre for Personalized Medicine, Almazov National Medical Research Centre, Saint Petersburg, Russia
| | - Tatiana Vershinina
- World-Class Research Centre for Personalized Medicine, Almazov National Medical Research Centre, Saint Petersburg, Russia
| | - Svetlana Fetisova
- World-Class Research Centre for Personalized Medicine, Almazov National Medical Research Centre, Saint Petersburg, Russia
| | - Olga Peregudina
- World-Class Research Centre for Personalized Medicine, Almazov National Medical Research Centre, Saint Petersburg, Russia
| | - Tatiana Kovalchuk
- World-Class Research Centre for Personalized Medicine, Almazov National Medical Research Centre, Saint Petersburg, Russia
| | - Elena Yakovleva
- World-Class Research Centre for Personalized Medicine, Almazov National Medical Research Centre, Saint Petersburg, Russia
| | - Polina Sokolnikova
- World-Class Research Centre for Personalized Medicine, Almazov National Medical Research Centre, Saint Petersburg, Russia
| | - Alexandra Klyushina
- World-Class Research Centre for Personalized Medicine, Almazov National Medical Research Centre, Saint Petersburg, Russia
| | - Kseniia Chueva
- Department of Pediatric Cardiology, Almazov National Medical Research Centre, Saint Petersburg, Russia
| | - Anna Kostareva
- Institute of Molecular Biology and Genetics, Almazov National Medical Research Centre, Saint Petersburg, Russia
- Department of Women’s and Children’s Health and Center for Molecular Medicine, Karolinska Institutet (KI), Solna, Sweden
| | - Tatiana Pervunina
- Institute of Perinatology and Pediatrics, Almazov National Medical Research Centre, Saint Petersburg, Russia
| | - Elena Vasichkina
- World-Class Research Centre for Personalized Medicine, Almazov National Medical Research Centre, Saint Petersburg, Russia
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Kovalchuk T, Yakovleva E, Fetisova S, Vershinina T, Lebedeva V, Lyubimtseva T, Lebedev D, Mitrofanova L, Ryzhkov A, Sokolnikova P, Fomicheva Y, Kozyreva A, Zhuk S, Smolina N, Zlotina A, Pervunina T, Kostareva A, Vasichkina E. Case Reports: Emery-Dreifuss Muscular Dystrophy Presenting as a Heart Rhythm Disorders in Children. Front Cardiovasc Med 2021; 8:668231. [PMID: 34026875 PMCID: PMC8137911 DOI: 10.3389/fcvm.2021.668231] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Accepted: 04/07/2021] [Indexed: 01/06/2023] Open
Abstract
Emery-Dreifuss muscular dystrophy (EDMD) is inherited muscle dystrophy often accompanied by cardiac abnormalities in the form of supraventricular arrhythmias, conduction defects and sinus node dysfunction. Cardiac phenotype typically arises years after skeletal muscle presentation, though, could be severe and life-threatening. The defined clinical manifestation with joint contractures, progressive muscle weakness and atrophy, as well as cardiac symptoms are observed by the third decade of life. Still, clinical course and sequence of muscle and cardiac signs may be variable and depends on the genotype. Cardiac abnormalities in patients with EDMD in pediatric age are not commonly seen. Here we describe five patients with different forms of EDMD (X-linked and autosomal-dominant) caused by the mutations in EMD and LMNA genes, presented with early onset of cardiac abnormalities and no prominent skeletal muscle phenotype. The predominant forms of cardiac pathology were atrial arrhythmias and conduction disturbances that progress over time. The presented cases discussed in the light of therapeutic strategy, including radiofrequency ablation and antiarrhythmic devices implantation, and the importance of thorough neurological and genetic screening in pediatric patients presenting with complex heart rhythm disorders.
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Affiliation(s)
- Tatiana Kovalchuk
- World-Class Research Centre for Personalized Medicine, Almazov National Medical Research Centre, Saint Petersburg, Russia
| | - Elena Yakovleva
- World-Class Research Centre for Personalized Medicine, Almazov National Medical Research Centre, Saint Petersburg, Russia
| | - Svetlana Fetisova
- World-Class Research Centre for Personalized Medicine, Almazov National Medical Research Centre, Saint Petersburg, Russia
| | - Tatiana Vershinina
- World-Class Research Centre for Personalized Medicine, Almazov National Medical Research Centre, Saint Petersburg, Russia
| | - Viktoriya Lebedeva
- Institute of Heart and Vessels, Almazov National Medical Research Centre, Saint Petersburg, Russia
| | - Tamara Lyubimtseva
- Institute of Heart and Vessels, Almazov National Medical Research Centre, Saint Petersburg, Russia
| | - Dmitriy Lebedev
- Institute of Heart and Vessels, Almazov National Medical Research Centre, Saint Petersburg, Russia
| | - Lubov Mitrofanova
- Pathology Unit, Almazov National Medical Research Centre, Saint Petersburg, Russia
| | - Anton Ryzhkov
- Radiology Unit, Almazov National Medical Research Centre, Saint Petersburg, Russia
| | - Polina Sokolnikova
- Institute of Molecular biology and Genetics, Almazov National Medical Research Centre, Saint Petersburg, Russia
| | - Yuliya Fomicheva
- Institute of Molecular biology and Genetics, Almazov National Medical Research Centre, Saint Petersburg, Russia
| | - Alexandra Kozyreva
- Institute of Molecular biology and Genetics, Almazov National Medical Research Centre, Saint Petersburg, Russia
| | - Sergey Zhuk
- Institute of Molecular biology and Genetics, Almazov National Medical Research Centre, Saint Petersburg, Russia
| | - Natalia Smolina
- Institute of Molecular biology and Genetics, Almazov National Medical Research Centre, Saint Petersburg, Russia
| | - Anna Zlotina
- Institute of Molecular biology and Genetics, Almazov National Medical Research Centre, Saint Petersburg, Russia
| | - Tatiana Pervunina
- Institute of Perinatology and Pediatrics, Almazov National Medical Research Centre, Saint Petersburg, Russia
| | - Anna Kostareva
- Institute of Molecular biology and Genetics, Almazov National Medical Research Centre, Saint Petersburg, Russia.,Department of Women's and Children's Health and Center for Molecular Medicine, Karolinska Institutet, Solna, Sweden
| | - Elena Vasichkina
- World-Class Research Centre for Personalized Medicine, Almazov National Medical Research Centre, Saint Petersburg, Russia
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Yakovleva E. Psychosexual Indicators of Sexual Violence in Children and Adolescents. Eur Psychiatry 2009. [DOI: 10.1016/s0924-9338(09)71064-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Purpose:Searchof psychosexual indicators of sexual violence.Object:Infant and juvenile victims of sexual offends (51 persons).Method:Sexological.Results:Psychosexual disorders associated with sexual violence were observed in 24%.For children of 3-7 years set is significant:Sexualization of behavior:– french kissing with friends;– interest to intimate parts of body;– a frequent situating of fingers in perineum;– inserting into genitals different subjects;– seizing for a breast or genitals.Description to strangers those sexual actions which with them were realized.For children of 7-12 years set is significant:Sexualization of behavior: – tempting behavior with persons of an opposite sex with make a suggestion of sexual contact;– imitation of sexual contact;– masturbation in public place.Unusual sexual knowledge for this age.For male adolescents set is significant:Psychosexual dissociation: platonic and erotic libido is heterosexual, sexual libido is homosexual.Disorders of identity: feminine identity and hyper-role behavior only with coevals of own sex.For female adolescents set is significant:Psychosexual dissociation:– love for the concrete coeval with lack of sexual desire to him;– presence of physiological sexual reactions on without personality object (heroes of books, television movies, etc.).Illegible erotic behavior and lack of sexual desire.Sexual aversion, restrictions of verbal contacts with young men, victims terminate to use of formal female attributes.Conclusion:Results may be used for differential diagnostics of sexual development's disorders of different genesis.
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Kolchinsky A, Kanazin V, Yakovleva E, Gazumyan A, Kole C, Ananiev E. 5S-RNA genes of barley are located on the second chromosome. Theor Appl Genet 1990; 80:333-336. [PMID: 24220965 DOI: 10.1007/bf00210068] [Citation(s) in RCA: 8] [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] [Received: 10/01/1989] [Accepted: 04/11/1990] [Indexed: 06/02/2023]
Abstract
The genes coding for 5S RNA in barley were cloned, sequenced, and their cluster was assigned to chromosome 2 using wheat-barley chromosome addition lines. High-resolution gel-electrophoresis of DNA and subsequent hybridization revealed new details of the organization of 5S DNA both in wheat and barley. The in situ hybridization of the cloned 5S gene with triploid endosperm nuclei also suggests that these genes are located in a single locus.
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Affiliation(s)
- A Kolchinsky
- Laboratory of Plant Molecular Genetics, N. I. Vavilov Institute of General Genetics of the USSR Academy of Sciences, Gubkin str. 3, B-333, Moscow, USSR
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