[Trends in the incidence of mental and behavioral disorders during the COVID-19 pandemic in Penza Oblast]. / Dinamika zabolevaemosti psikhicheskimi rasstroistvami i rasstroistvami povedeniya v period pandemii COVID-19 v Penzenskoi oblasti.

OBJECTIVE: An analysis of the trend of overall and primary incidence of mental and behavioral disorders, including those caused by the use of psychoactive substances, in different age groups during the COVID-19 pandemic in Penza Oblast. MATERIAL AND METHODS: The data were obtained from statistical report №12 for Penza Oblast. These included the overall and primary incidence of mental and behavioral disorders (MBD), as well as substance use-related MBD (MBDSUR), as calculated per 100.000 people for the period 2015 to 2022. The period 2015 to 2019 was the reference period and 2020 to 2022 was the pandemic period. The calculation was carried out by age groups: children (0-14 years), adolescents (15-17 years), adults (over 18 years), adults over working age (from 55 years for women and from 60 years for men). Statistical processing of the results included regression analysis, calculation of incidence forecast for 2023-2025, and assessment of the significance of the changes using the t-criterion. RESULTS: The decrease in the overall incidence of MBD in adults was highly deterministic (R2=0.82; p=0.012) and significant between 2017-2018 (p=0.009), 2018-2019 (p=0.001) and 2019-2020 (p=0.004). High determination with a logarithmic trend line was characteristic of almost all models, except for the primary incidence of MBD in children and overall incidence of MBDSUR in adults over working age, including after 2020. Among adolescents, the overall incidence of MBDSUR decreased significantly from 2015 to 2022 (p=0.042). CONCLUSION: There was no significant increase in the incidence of MBD, including MBDURS, during the pandemic. At the same time, there was a trend towards the decrease in adults, as well as the increase in the primary incidence of MBD in children and the overall incidence of MBDSUR in adults over working age, which determines the need for further identification of risk factors and development of specific rehabilitation measures for patients in these groups.

Effect of Inducers and Inhibitors of the Keap1/Nrf2/ARE System on the Viability and Functional Activity of Model Neuronal-Like and Glial Cells.

On mouse neuroblastoma (Neuro-2a) and human glioblastoma (U-87 MG) cell lines, we studied the effect of inducers and inhibitors of redox-sensitive signaling system of the antioxidant-responsive element Keap1/Nrf2/ARE on the main processes that determine nerve cell viability and vital activity (proliferative activity, apoptosis, autophagy, and activation of the Keap1/Nrf2/ARE system). Inhibitors of the Keap1/Nrf2/ARE system stimulate apoptosis more pronouncedly than inducers, have a weaker effect on autophagy, and do not change the nuclear to cytoplasmic Nrf2 ratio. In general, the revealed effects testify in favor of the potential effectiveness of stimulating the Keap1/Nrf2/ARE system for the prevention and adjuvant therapy of neurodegenerative diseases.

[Application of narrow-band optical radiation with a wavelength of 650 nm in complex treatment of children with developmental speech delay]. / Primenenie uzkopolosnogo opticheskogo izlucheniya s dlinoi volny 650 nm v kompleksnom lechenii detei s zaderzhkoi rechevogo razvitiya.

OBJECTIVE: To substantiate the use of photochromotherapy (narrow-band optical radiation with an average wavelength of 650 nm) in the complex treatment of children with developmental speech delay on the type of general speech underdevelopment (GSU) of I and II degree. MATERIAL AND METHODS: A number of children equal 70 aged from 4 to 6 years with developmental speech delay were examined. All patients were randomized into 2 clinically comparable groups: the 1st (study) group included 35 patients who received medical treatment in accordance with clinical recommendations in combination with the use of narrow-band optical radiation with an average wavelength of 650nm for 10 days; the 2nd (comparison) group consisted of 35 subjects who received standard drug therapy according to the established clinical recommendations. All patients underwent a comprehensive clinical examination and a special neurological investigation, including electroencephalography and electromyography, as well as an assessment of the development of speech functions and dynamic coordination of gesture, the level of social and communication skills development and neuropsychological processes. RESULTS: The following data were obtained during the complex treatment with the inclusion of narrow-band optical radiation with an average wavelength of 650 nm (red radiation): statistically significant improvement of speech development (p<0.05); improvement of values of social adaptation skills of medium (71%) (Z=2.769; p=006) and low level (29%) (Z=2.691; p=0.007); significant positive dynamics of speech status (Z=3.911; p=0.000); spontaneous activity relief at rest, indicating normalization of muscle tone. CONCLUSION: The inclusion of photochromotherapy in standard therapeutic regimens for children with developmental speech delay on the GSU type of I, II degrees contributes to a significantly confirmed pronounced clinical improvement and can be recommended for practical health care.

[Total DNA methylation profile in assessing the MGMT gene promoter status in malignant gliomas]. / Rezul'taty i perspektivy ispol'zovaniya obshchego profilya metilirovaniya DNK dlya otsenki statusa promotora gena MGMT v zlokachestvennykh gliomakh.

Methylation of the O-6-methylguanine-DNA methyltransferase (MGMT) gene promoter is currently the most important prognostic biomarker in therapy of IDH-wild-type glioblastoma. One can obtain information about this methylation from total DNA methylation profile. OBJECTIVE: To analyze the DNA methylation signal intensity in the MGMT gene in samples of malignant gliomas and identify the most significant genomic positions for calculating the MGMT gene promoter status for further improvement of diagnostics and prediction of therapeutic options in patients with malignant gliomas. MATERIAL AND METHODS: The study is based on 43 samples (frozen tissue or paraffin blocks) from patients with malignant gliomas. Tumor DNA samples were prepared using the Illumina Infinium MethylationEPIC BeadChip Kit and the Illumina Next-Seq 550 Sequencing System platform. DNA methylation profiles were analyzed using computational algorithms in the R language, specialized libraries minfi and mgmtstp27, as well as basic statistical functions in the Rstudio environment. RESULTS: We established the MGMT gene promoter status in 43 samples of malignant gliomas considering total DNA methylation profile. In 24 samples (55%), the MGMT gene promoter was methylated. We compared methylation signal in certain CpG islands in groups with methylated and unmethylated MGMT gene promoters and identified the most significant positions for further improvement of data analysis algorithm. CONCLUSION: These data demonstrate the possibilities and prospects for further improvement of algorithm for analysis of the MGMT gene promoter status based on total DNA methylation profile in patients with malignant gliomas as an alternative to methyl-specific PCR. Our results are consistent with data of other neuro-oncology researchers. Indeed, computational methods like MGMT-STP27 are quite powerful and can be used in scientific and clinical practice to assess prognosis and make decisions about chemotherapy with alkylating agents.

[Verification of the diagnosis of supratentorial ependymomas by real-time PCR]. / Verifikatsiya diagnoza supratentorial'nykh ependimom metodom PTsR v rezhime real'nogo vremeni.

BACKGROUND: Differential diagnosis of supratentorial ependymomas is of particular difficulty in neurooncology due to nonspecific clinical and radiographic findings, a rare seen «classic¼ morphological picture, and a nonspecific immunophenotype. Thanks to molecular genetic methods, in particular real-time PCR, it has become possible to verify supratentorial ependymomas and identify their molecular group, on which further prognosis depends. OBJECTIVE: To develop a set of molecular genetic tests based on real-time PCR to verify supratentorial ependymomas. MATERIAL AND METHODS: 56 tissue samples were collected from patients with supratentorial ependymomas, WHO Grade II, and anaplastic ependymomas, WHO Grade III. We developed primers and fluorescent TaqMan probes for real-time PCR analysis to detect the ZFTA::RELA, ZFTA::MAML2, ZFTA::NCOA2, ZFTA::MAML3, YAP1::MAMLD1, and YAP1::FAM118B gene fusions. For immunohistochemical analysis, monoclonal rabbit anti-NF-kb p65 antibodies (HUABIO, China) were used, the study was carried out on AutostainerLink 48 immunostainer (DAKO, Denmark). RESULTS: Real-time PCR was able to verify the diagnosis for 69.9% (n=39) of samples and classify them into molecular groups of ZFTA- or YAP1-positive supratentorial ependymomas. Immunohistochemically it was possible to verify 58% (n=29) ependymomas. CONCLUSION: Diagnosis by real-time PCR is a relatively fast, accessible and easily interpreted method that allows verification of the molecular group in 70% of cases of supratentorial ependymomas without the use of additional methods.

[Pathological changes in the nervous structures of the aortic wall tissue adjacent to an unstable atherosclerotic plaque]. / Patologicheskie izmeneniya nervnykh struktur v tkanyakh stenki aorty, prilezhashchikh k nestabil'noi ateroskleroticheskoi blyashke.

OBJECTIVE: To study of nerve structures in the aortic wall in atherosclerosis using a complex of immunohistochemical markers. MATERIAL AND METHODS: The objects of the study were excised fragments of the wall of the thoracic and abdominal aorta along with visually determined unstable atherosclerotic plaques. To study nerve structures on paraffin sections, immunohistochemical reactions were performed for the PGP 9.5 protein, tyrosine hydroxylase, and synaptophysin. RESULTS: It has been established that pronounced pathological changes are observed in the nervous structures of the aortic wall near unstable atherosclerotic plaques. Reactive, dystrophic, and severe degenerative changes in neurocytes, nerve fibers, and glial cells are described in the elements of the nervous apparatus of the adventitia (microganglia, nerve trunks, and nerve plexuses). It was found that only sympathetic neurons and their postganglionic fibers remain in the intramural ganglia, while the structures of the parasympathetic nervous apparatus undergo degeneration. Destruction of perivascular nerve plexuses and vasa vasorum in the adventitia, as well as degeneration of varicose axons of the main terminal synaptic plexus at the border of adventitia and superficial smooth muscle layer of the media were demonstrated. CONCLUSION: It is assumed that the presence of inflammatory infiltrates in the adventitia and intima, denervation and death of vasa vasorum can serve as factors determining the development of the atherosclerotic process.

[The role of inflammation in the development of diabetic polyneuropathy and the possibility of its correction]. / Rol' vospaleniya v razvitii diabeticheskoi polineiropatii i vozmozhnost' ego korrektsii.

OBJECTIVE: To study the effect of the combined drug Cytoflavin on the mechanisms of nonspecific inflammation in the treatment of diabetic polyneuropathy (DPN) with an assessment of the dynamics of the TNF-α index. MATERIAL AND METHODS: An open comparative prospective observation of patients with a history of DPN for more than 5 years and a high level of TNF-α was carried out. All patients underwent basic oral combined hypoglycemic therapy, the main group used the combined drug Cytoflavin 10 ml (per 200 ml 0.9% NaCl) for 10 days, followed by the transition to the enteral form of the drug, 2 tablets 2 times a day for 1 months The main indication for the appointment of Cytoflavin was the presence of comorbid pathology in the form of cerebrovascular disease in all studied patients. The severity of clinical symptoms of DPN, the quality of life (QOL) of patients, as well as the dynamics of the level of TNF-α as an indicator reflecting the process of inflammation were assessed. RESULTS: As a result of the treatment in the study group, there was an improvement in QoL, a decrease in the severity of sensory complaints and a decrease in the level of TNF-α, which may indicate a possible anti-inflammatory mechanism of the combined drug Cytoflavin. CONCLUSION: Cytoflavin can inhibit inflammation and reduce the severity of sensitive disorders in patients with DPN.

[A study of genetic variants in patients with ischemic stroke in human rat gene orthologues]. / Izuchenie geneticheskikh variantov u patsientov s ishemicheskim insul'tom v chelovecheskikh ortologakh krysinykh genov.

OBJECTIVE: To study the associations of nine genetic variants with the risk and dynamics of recovery (outcome) of ischemic stroke (IS) using the developed protocol for the search for genomic markers based on a bioinformatic approach to the study of single nucleotide polymorphisms (SNPs) in human orthologues of rat genes differentially expressed under conditions of induced cerebral ischemia. MATERIAL AND METHODS: We identified and analyzed nine SNPs in 553 Russians (331 IS patients and 222 controls). The National Institutes of Health Stroke Scale (NIHSS) was used to assess stroke severity. Functional recovery after stroke was assessed using the modified Rankin scale (mRS). The principles of selection of polymorphic markers analyzed in the study were determined according to the protocol developed by us earlier. Selected SNP tags were genotyped using real-time polymerase chain reaction (PCR) TaqMan. RESULTS: The relationship of SNP with both the risk of IS and the dynamics of its recovery was investigated. SNP rs66782529 (LGALS3) was associated with negative IS outcomes (p=0.048). SNPs rs62278647 and rs2316710 (PTX3) were significantly associated with IS risk (p=0.000029 and p=0.0025, respectively). The associations for rs62278647 and rs2316710 were found only in females, suggesting a gender-related PTX3 polymorphism. CONCLUSION: This study not only reveals some new genetic links to IS and its consequences, but also shows how the study of gene variations in a rat model of cerebral ischemia can be useful in the search for genetic markers of this disease in humans.

[An overview of risk factors for stroke]. / Obzor faktorov riska insul'ta.

Stroke is a heterogeneous syndrome, and the definition of risk factors, treatment and prevention tactics depends on the specific pathogenesis of the disease. Risk factors for ischemic and hemorrhagic stroke are similar, but at the same time there are significant differences. The concept of stroke triggers is discussed separately. In addition, a deep understanding of the pathogenetic mechanisms and the development of new strategies for therapy and prevention require an understanding of the genetic mechanisms of stroke risk. Genetic factors may be more modifiable than previously thought. To reduce the burden of stroke in the population, timely identification and management of modifiable risk factors is essential.

[Multiple gliomas]. / Mnozhestvennye gliomy.

The authors present 2 patients. One of them had typical multifocal primary multiple synchronous wild-type IDH1/2 glioblastoma subtype RTK1, chromosome 7 duplication, homozygous CDKN2A deletion and chromosome 10 deletion. In another patient, the nature of tumors remains debatable. We can talk about either a rare atypical case of metachronous multicentric various glial tumors (oligodendroglioma, IDH1-mutant and 1p/19q-codeleted, WHO grade 2 and RTK2-glioblastoma) or secondary glioblastoma after previous oligodendroglioma arose a year after radiotherapy.

[Features of innervation of epicardial adipose tissue in rats during aging (immunohistochemical study).]

The purpose of the article is to study the structure, innervation and state of the epicardial adipose tissue of the aortic-pulmonary region of the heart of rats at the age of 3-4 months and 18-23 months using neuroimmunohistochemical markers. Using a complex of histological and immunohistochemical methods, various nervous apparatus (ganglia, clusters of chromaffin cells, nerve trunks, nerve fibers, nerve plexuses, synaptic endings) with different mediators were identified in the white and brown adipose tissue of the base of the rat heart. It was found that parasympathetic and sympathetic postganglionic nerve fibers are involved in the innervation of white and brown adipose tissue. They penetrate into adipose tissue as part of Remak's cords of varicose axons along arterial vessels, form terminal synaptic plexuses of the en passant type, and are involved in the innervation of adipocytes of both types of epicardial adipose tissue. It was found that PGP 9.5+ cholinergic terminal nerve fibers predominate over catecholaminergic ones. During aging of rats, neurodegenerative, involutive (desimatization), and destructive pathological changes in white adipocytes were noted in epicardial adipose tissue.

[Efficiency of the attention networks and severity of positive and negative symptoms in schizophrenia]. / Effektivnost' setei vnimaniya i vyrazhennost' pozitivnoi i negativnoi simptomatiki pri shizofrenii.

OBJECTIVE: To examine the characteristics of the event related potentials during the attention network test in patients with schizophrenia depending on the severity of positive and negative symptoms. MATERIAL AND METHODS: The study included 20 patients with schizophrenia, 10 of them with a predominance of positive symptoms and 10 patients with a predominance of negative symptoms. All patients were diagnosed with paranoid schizophrenia (F20.0). Attention function was assessed using the attention network test with parallel recording of evoked responses. Differences in the amplitude and latency of N100 potential when presented with different types of cues, as well as P300 potential when identifying a congruent and incongruent flanker were analyzed. RESULTS: A comparative analysis of N100 potential for neutral cues and flankers showed significantly lower amplitude and longer latency in the group of patients with a predominance of negative symptoms (Cz channel).The amplitude of the evoked N100 response upon presentation of central and spatial cues was significantly higher in the group of patients with a predominance of positive symptoms. An analysis of P300 potential in Fz channel with congruent and incongruent flankers revealed no differences in the amplitude of both stimuli in the group of patients with a predominance of negative symptoms, while the amplitude of the evoked response to congruent and incongruent flankers was significantly higher in the group with a predominance of positive symptoms. In the group of patients with a predominance of positive symptoms, an inverse flanker response was established - P300 amplitude was significantly higher upon presentation of an incongruent flanker. CONCLUSION: The specific characteristics of evoked responses describing the features of such systems of attention as vigilance, orientation and conflict resolution have been established.

[The psychological characteristics of food behavior of the youth in conditions of self-isolation].

The article presents the results of psychological study of characteristics of food behavior in young people in the conditions of forced self-isolation and COVID-19 coronavirus infection pandemic. The common research methods were applied to establish actual food disorders and intensification of their symptoms during isolation. The food behavior of each individual can be considered as network of interactions between various natural factors (physiological, psychological, economic, sociocultural ones). It is conditioned by stress level due to pandemic. The comparative analysis of study results concerning specifics of food behavior in conditions of self-isolation in young and middle-aged people demonstrated that there is significant relationship between external, emotionogenic food behavior, restrictive food behavior and age of subjects. The correlation analysis established statistical significance of a number of scales. In sample of middle-aged objects, relationships between external and emotionogenic food behavior were established. The emotionogenic condition was associated with dissatisfaction with one's own body, and body image - with restrictive food behavior. The direct statistical significance of dependence of restrictive behavior from age was revealed. In all cases, more intensive manifestation of food disorders was detected in sampling of young people that confirms hypothesis that middle-aged people are inclined to other types of food disorders as compared with young people. The severity of disorders is also less pronounced. The actuality of the analyzed problem is determined by both trends in development of scientific knowledge and existing needs of social practice.

[The effect of the use of the drug recognan (citicoline) on the state of higher mental functions in patients with mild cognitive impairment]. / Vliyanie preparata Rekognan na sostoyanie vysshikh psikhicheskikh funktsii u patsientov s legkimi kognitivnymi narusheniyami.

OBJECTIVE: The aim of the observational program was to study the effect of the use of the drug recognan (citicoline) on the state of higher mental functions (memory, attention, visual-motor coordination, dynamic praxis,verbal thinking and imagination) in patients with mild cognitive impairment. MATERIAL AND METHODS: A survey of 54 subjects (16 of them male and 38 female) aged 18-50 years (average age 28.5±10.5 years) was conducted with a diagnosis of «Mild cognitive impairment¼ («F06.7¼). The group was randomized into 2 subgroups: the main subgroup (26 people) received oral therapy with the drug Recognan, for 30 days, with the daily dosage of the drug being 500 mg. In the control group (28 people), nootropic drug therapy was not performed. Standard psychometric techniques were used to study higher mental functions. All subjects were examined three times (initially, in the middle of the study - on day 15, at the end of the study - on day 30). RESULTS AND CONCLUSION: After 2 weeks of treatment with recognan, there was an improvement in concentration in 81.9%, memory in 50% (p=0.008), verbal imagination productivity in 68.2% (p=0.015), counting functions in 60% (p=0.015), visual-motor coordination and dynamic praxis - in 86.4% (p=0.003), increased speed and efficiency of mental work (p=0.001). After a 30-day course of treatment with recognan, there was an improvement in memory in 58.3% of patients (p=0.007), an increase in concentration in 64%, an improvement in counting functions in 64.3% (p=0.011), verbal imagination productivity in 63.3%, visual-motor coordination and dynamic praxis in 86.4% (p=0.007), speed and efficiency of mental work (p=0.006), which indicates a complex positive effect of recognan on higher mental functions in patients with mild cognitive impairment cognitive impairment.

Changes in the Thickness of Rat Nerve Sheaths after Single Subperineural Administration of Rat Bone Marrow Mesenchymal Stem Cells.

The sheaths of the damaged peripheral nerve of Wistar-Kyoto rats were studied after single subperineural administration of bromodeoxyuridine (BrdU)-labeled bone marrow mesenchymal stem cells (MSC) from the same rats. The sciatic nerve was damaged by ligation for 40 sec directly before MSC administration. BrdU+ MSC were identified in the recipient nerve within 1 week after transplantation and were detected not only in the endoneurium, but also in the epineurium and perineurium. It was found that single administration of MSC into the damaged nerve trunk led to an almost 2-fold increase in the thickness of its sheaths (perineurium and epineurium) in comparison with the control group (ligation). It can be hypothesized that MSC induce thickening of nerve sheaths through the production of factors that stimulate angiogenesis and adipogenesis.

A simple nomogram for early postoperative risk prediction of clinically relevant pancreatic fistula after pancreatoduodenectomy.

PURPOSE: Postoperative pancreatic fistulae (POPF) present a serious and life-threatening complication after pancreatic head resections (PD). Therefore, reliable risk stratification to identify those at risk is urgently needed. The aim of this study was to identify postoperative laboratory parameters for the prediction of POPF in the early postoperative period. METHODS: One hundred eighty-two patients who underwent PD from 2012 until 2017 were retrospectively analyzed. Multivariate logistic regression was performed using the GLM (general linear model) method for model building. Two nomograms were created based on the GLM models of postoperative day one and postoperative day one to five. A cohort of 48 patients operated between 2018 and 2019 served as internal validation. RESULTS: Clinically relevant pancreatic fistulae (CR-POPF) were present in 16% (n = 29) of patients. Patients with CR-POPF experienced significantly more insufficiencies of gastroenterostomies, delayed gastric emptying, and more extraluminal bleeding than patients without CR-POPF. Multivariate analysis revealed multiple postoperative predictive models, the best one including ASA, main pancreatic duct diameter, operation time, and serum lipase as well as leucocytes on day one. This model was able to predict CR-POPF with an accuracy of 90% and an AUC of 0.903. Two nomograms were created for easier use. CONCLUSION: Clinically relevant fistula can be predicted using simple laboratory and clinical parameters. Not serum amylase, but serum lipase is an independent predictor of CR-POPF. Our simple nomograms may help in the identification of patients for early postoperative interventions.

[Unspecified encephalitis in HIV-infected patients: clinical and postmortem evaluation].

BACKGROUND: The search for an aetiology of central nervous system (CNS) lesions In HIV patients can be extremely challenging. AIM: To establish the nature and character of CNS lesion according to the data of pathological examination of deceased HIV-patients who had an antemortem clinical diagnosis of unspecified encephalitis. MATERIALS AND METHODS: We analysed clinical and laboratory data of 225 HIV-patients admitted to the ICU at the Infectious Clinical Hospital №2 (Moscow, 2018). The principal diagnosis was unspecified encephalitis characterized by cerebral oedema. Had died 183 (67.9%) patients. We conducted pathological examination in 43 (23.5%). RESULTS: CNS lesions occurred in 331 patients (58.8% of 563 ICU). The antemortem diagnosis established were as follows: 12.1% toxoplasmosis; 6.6% HIV-encephalitis; 5.1% CNS lymphoma; 3.6% cryptococcal meningoencephalitis; 3.0% cytomegaloviral diseases; 2.1% progressive multifocal leukoencephalopathy. The cause of the pathology remained unidentified in 225 patients (68% with CNS lesions). Majority of patients were ART-naive. Post-mortem verification was conducted in 29 (67.4%) deceased patients, of which HIV-encephalitis 34.5%, toxoplasmosis 10.3%, progressive multifocal leukoencephalopathy 3.4%. The nature of brain damage in the remaining 20.7% cases was not established even after post-mortem investigation. Productive lepto-meningitis 8 (27.6%), indicating a prolonged duration of the inflammatory process. In the brain 48.1% patients with subacute and productive changes, had a pre-hospital time of more than 30 days, in contrast to 11.1% of patients who had acute pathological processes in the CNS (p0.05). Autopsy didnt reveal any inflammatory changes in the brain in 14 (32.6%) patients, though cerebral oedema 93.3%, haemorrhagic syndrome 60% cases. CONCLUSION: Accurate retrospective identification of the aetiology of CNS lesions combined with assessing in vivo characterisation of the pathological process plays an essential role in subsequent formation of diagnostic approaches in pathologies of the CNS in HIV-patients.

[Morphological signs of neurogenic inflammation in the heart of rats during aging.]

Using histological methods of staining with toluidine blue, hematoxylin-eosin and immunohistochemical reactions for the PGP 9,5 protein, tyrosine hydroxylase (TH), Iba-1 protein, cellular changes in different parts of the heart of Wistar rats at the age of 18-23 months were studied. In the connective tissue of the heart base, focal inflammatory infiltrates were found, near which PGP 9.5+ and TH+ plexuses, consisting of parasympathetic and sympathetic nerve fibers, were detected. In the area of the valvular heart apparatus, at the border of the anneau fibreux and the myocardium of the right atrium, pathological changes in nerve structures were found: degeneration of nerve fibers and granular destruction varicose axons of the terminal plexus. A close relationship has been established between axons of the terminal nervous network and cells of inflammatory infiltrates and blood capillaries. The features of the localization of neurocellular inflammatory complexes consisting of nerve fibers, blood capillaries and cells participating in the local inflammatory process (mast cells, histiocytes, monocytes, fibroblasts, plasma cells) in various parts of the myocardium in old animals are described. The chronic nature of neurogenic inflammation in the heart during aging has been established.

Bjurböle L/LL4 ordinary chondrite properties studied by Raman spectroscopy, X-ray diffraction, magnetization measurements and Mössbauer spectroscopy.

Bjurböle L/LL4 ordinary chondrite was studied using scanning electron microscopy with energy dispersive spectroscopy, Raman spectroscopy, X-ray diffraction, magnetization measurements and Mössbauer spectroscopy. The phase composition and the relative iron fractions in the iron-bearing phases were determined. The unit cell parameters for olivine, orthopyroxene and clinopyroxene are similar to those observed in the other ordinary chondrites. The higher contents of forsterite and enstatite were detected by Raman spectroscopy. Magnetization measurements showed that the temperature of the ferrimagnetic-paramagnetic phase transition in chromite is around 57 K and the saturation magnetic moment is ~7 emu/g. The values of the 57Fe hyperfine parameters for all components in the Bjurböle Mössbauer spectrum were determined and related to the corresponding iron-bearing phases. The relative iron fractions in Bjurböle and the 57Fe hyperfine parameters of olivine, orthopyroxene and troilite were compared with the data obtained for the selected L and LL ordinary chondrites. The Fe2+ occupancies of the M1 and M2 sites in silicate crystals were determined using both X-ray diffraction and Mössbauer spectroscopy. Then, the temperatures of equilibrium cation distribution were determined, using two independent techniques, for olivine as 666 K and 850 K, respectively, and for orthopyroxene as 958 K and 1136 K, respectively. Implications of X-ray diffraction, magnetization measurements and Mössbauer spectroscopy data for the classification of the studied Bjurböle material indicate its composition being close to the LL group of ordinary chondrites.

Characterization of Kemer L4 meteorite using Raman spectroscopy, X-ray diffraction, magnetization measurements and Mössbauer spectroscopy.

The bulk interior of Kemer L4 ordinary chondrite was characterized for the first time by means of optical microscopy, scanning electron microscopy with energy dispersive spectroscopy, Raman spectroscopy, X-ray diffraction, magnetization measurements and Mössbauer spectroscopy with a high velocity resolution. The main and minor iron-bearing phases were found as well as ferrihydrite as a result of weathering. The Fe2+ partitioning among the M1 and M2 sites in olivine, orthopyroxene and clinopyroxene was determined from the X-ray diffraction. The ratios of Fe2+ occupancies for these crystals were estimated from both X-ray diffraction and Mössbauer spectroscopy data and appeared to be in a good agreement. The distribution coefficients KD and the temperatures of equilibrium cation distribution Teq were also evaluated for olivine and orthopyroxene from two independent techniques and were in a good consistence: KD = 1.77, Teq = 441 K (X-ray diffraction) and KD = 1.77, Teq = 439 K (Mössbauer spectroscopy) for olivine and KD = 0.10, Teq = 806 K (X-ray diffraction) and KD = 0.09, Teq = 787 K (Mössbauer spectroscopy) for orthopyroxene. The fusion crust of Kemer L4 was studied using X-ray diffraction, magnetization measurements and Mössbauer spectroscopy. Magnesioferrite and probably maghemite were found in the fusion crust in addition to other phases observed in the bulk interior.