First Measurement Using Elliptically Polarized Photons of the Double-Polarization Observable E for γp→pπ

We report the measurement of the helicity asymmetry E for the pπ^{0} and nπ^{+} final states using, for the first time, an elliptically polarized photon beam in combination with a longitudinally polarized target at the Crystal Ball experiment at MAMI. The results agree very well with data that were taken with a circularly polarized photon beam, showing that it is possible to simultaneously measure polarization observables that require linearly (e.g., G) and circularly polarized photons (e.g., E) and a longitudinally polarized target. The new data cover a photon energy range 270-1400 MeV for the pπ^{0} final state (230-842 MeV for the nπ^{+} final state) and the full range of pion polar angles, θ, providing the most precise measurement of the observable E. A moment analysis gives a clear observation of the pη cusp in the pπ^{0} final state.

[The personnel maintenance of primary health care physicians in condition of challenges from menaces to population health].

In condition of challenges from menaces to health due to COVID-19 the role of primary health care physicians increases that requires development of management decisions at the regional level. The purpose of the study. On the basis of analysis of medical demographic indicators and data concerning provision of primary health care personnel in the Russian Federation, proposals were made related to reforming of primary health care system in conditions of implementation of general medical practice with purpose to counteract menaces to population health. The analytical and statistical methods were applied. The official statistics data from the Minzdrav of the Russian Federation and Rosstat, results of original researches with content analysis and interpretation were used. The COVID-19 pandemic negatively impacted population health. The indicator of newly detected morbidity in the Russian Federation in 2020 decreased as compared to 2019 from 78024.3 to 75989.7‰oo (by 2.6%). This is the result of decreasing of dispensary and preventive activities among population. In next COVID-19 year (2021), as compared to 2020, indicator of primary morbidity increased to 85531.6‰oo that 12.6% higher than in 2020. The increase occurred in all classes of diseases that caused necessity of rehabilitation of these patients. The COVID-19 morbidity increased up to 2.4 times i.e. from 3391.1 in 2020 to 8085.7‰oo in 2021. The provision of physicians in the Russian Federation was 37.7‰o in 2021. Across the Federal Okrugs differences in indicators made up to 1.3 times and in subjects of the Russian Federation - up to 2.7 times. In conditions of COVID-19 significance of menaces to population health worsened. The situation requires both enhancement of primary health care and implementation of physicians of new formation - general practitioners responsible for patient health. The general practice (GP) widely developed in Russia in the 1990s during last ten years loses its significance in most subjects of the Russian Federation. In 2021, provision of general practitioners in the Russian Federation made up to 0.67‰o. In the Federal Okrugs, difference between indicators made up to 5.6 times. In the subjects of the Russian Federation the difference is enormous - 141.5 times. The article presents and scientifically substantiates prospective functional organizational models of general practice. The established situation with COVID-19 infection requires development of management decisions and measures at the regional level concerning improvement of organization of primary health care and implementation of general practice in conditions of counteracting risks of menaces to population health and health preservation.

[Public health risk threats associated with coronavirus infection in Moscow and the need to counteract].

PURPOSE OF THE STUDY: to determine the main threats to the health of the population of Moscow based on the analysis of the medical and demographic situation in Moscow and the Russian Federation in the context of the COVID-19 pandemic, in order to develop management decisions at the regional level. MATERIAL AND METHODS: Materials of the Federal State Statistics Service (Rosstat), as well as statistical collections of the Russian Research Institute of Health of the Ministry of Health of Russia for 2013-2022 were used. RESULTS: Coronavirus infection has changed the morbidity and mortality rates of the population of the Russian Federation and its constituent entities. In the Russian Federation mortality in 2019-2021 increased from 12.3 to 13.6‰, while in Moscow the increase in the indicator is significant - from 9.5 to 16.7‰. The incidence of COVID-19 in Moscow in 2020-2021 (over the two COVID years) increased from 6191.0 to 8976.0‰oo. The noted decrease in incidence rates across almost all classes of diseases during the COVID period (2019-2020) was associated with the lower medical check-ups and preventive activities, while during 2019-2021 there was an increase in disease incidence of the following classes: mental disorders, behavior disorders; diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism, etc., indicating the need for rehabilitation of this group of patients. CONCLUSIONS: The need to counter the threats to the health of the population of Moscow caused by the coronavirus infection requires the development of management decisions aimed at strengthening preventive activities and rehabilitation of patients in the post-COVID period.

[The medical demographic indicators and health preservation of rural population of the Russian Federation].

For the last 20 years of analysis, mortality rate of rural population was higher than that one of entire population; in 2020, increasing of mortality due to COVID-19 was noted.The indicators were 15.4 per 1000 population for rural population, and 14.3‰ for urban population. In 2021, the indicators increased up to 17.5 and 16.5‰, respectively. The birth rate of rural population over last 20 years tended to increasing. In 2013, mortality and birth rates became equal (14.5‰). In subsequent years, birth rate decreased and in 2021 amounted to 9.6‰ and in 2022 to 9.5‰. In 2021, the indicator of general morbidity of rural population of the Russian Federation was 124941.0‰oo For entire population the indicator was higher - 167713.8‰oo. In 2021, the highest rates of general morbidity of rural population were in the classes of diseases of the respiratory system - 34470.2‰oo and the circulatory system - 21588.2‰oo. In 2021, the ranking of general incidence of rural population in the Federal districts of the Russian Federation demonstrated difference in indicators by 1.5 times and in the subjects of the Russian Federation it reached 5.3 times. The highest indicator was noted in the Nenets Autonomous District - 278926.7‰oo, the lowest one in the Magadan Oblast - 52441.5‰oo. In 2021, the incidence of COVID-19 in rural population amounted to 2151.9‰oo. In 2021, the indicator increased by 2.8 times up to 6056.8‰oo. There is 2.4-fold increase in incidence of COVID-19 in rural population from 3391.1‰oo (2020) to 8085.7‰oo (2021). The ranking of incidence rates of rural population of COVID-19 in the subjects of the Russian Federation demonstrated difference in 15.6 times. The highest indicators were noted in the Republic of Khakassia - 14104.1 per 100 thousand population and the lowest in the Magadan region - 902.9‰oo. Conclusions. The unfavorable medical and demographic situation in the countryside indicates the low availability of medical care, the need for financial support of rural areas at the municipal, regional and Federal levels.

Measurement of polarization observables T, P, and H in π0 and η photoproduction off quasi-free nucleons.

The target asymmetry T, recoil asymmetry P, and beam-target double polarization observable H were determined in exclusive π0 and η photoproduction off quasi-free protons and, for the first time, off quasi-free neutrons. The experiment was performed at the electron stretcher accelerator ELSA in Bonn, Germany, with the Crystal Barrel/TAPS detector setup, using a linearly polarized photon beam and a transversely polarized deuterated butanol target. Effects from the Fermi motion of the nucleons within deuterium were removed by a full kinematic reconstruction of the final state invariant mass. A comparison of the data obtained on the proton and on the neutron provides new insight into the isospin structure of the electromagnetic excitation of the nucleon. Earlier measurements of polarization observables in the γp→π0p and γp→ηp reactions are confirmed. The data obtained on the neutron are of particular relevance for clarifying the origin of the narrow structure in the ηn system at W=1.68GeV. A comparison with recent partial wave analyses favors the interpretation of this structure as arising from interference of the S11(1535) and S11(1650) resonances within the S11-partial wave.

The application of trimetazidine in healthy individuals: a systematic review.

OBJECTIVE: Currently, there is no evidence to support trimetazidine (TMZ) administration aimed at enhancing physical performance or post-exercise recovery in healthy individuals or athletes from the general and athletic populations, respectively. Considering the lack of empirical data, from a scientific and practical perspective, it would be interesting to review research with high methodological quality that examines the effects of TMZ on healthy individuals and athletes from various age groups. MATERIALS AND METHODS: Data sources included English articles that were initially searched by keywords utilizing PubMed, Scopus databases, and the Cochrane Library and published prior to November 2022. Thus, a systematic review of the scientific literature was performed with a traditional PRISMA methodology. An initial keyword search found 2,673 publications, and further screening selected 66 articles, of which only two articles met the inclusion criteria. RESULTS: Two trials examining the effect of TMZ on healthy members of the general population that were published in 2017 and 2019 were analyzed. Publications examining athletes were not recruited for this analysis. CONCLUSIONS: Currently, there are no data reporting a positive effect of TMZ on physical performance, post-exercise recovery, or other health parameters in members of the general population, while its administration is associated with the development of relatively common adverse effects.

[The problems of rural health care and prospects of development].

Further reforming of the rural health care should be proceeded with special attention to availability of medical care in countryside.The purpose of the study is to develop on the basis of analysis of accounting data and research results recommendations for improving organizational forms of medical care to country dwellers. The exploration of peopleware and main performance indicators of medical organizations in rural areas was implemented.The statistical, analytical and sociological methods were applied. The reporting forms 47, 30, 12 of Federal statistical monitoring are analyzed.Results. The provision of population with medical personnel in rural municipalities in 2010-2018 increased from 12.5 to 14.5 per 10 thousand of rural population. The provision with paramedical personnel made up to 52.3%oo and during the same years indicator decreased from 55.4 to 52.3%oo. During the analysis period, 4241 feldsher obstetric posts were reduced and in 2018 their number made up to 33,350. The number of feldshers in rural areas decreased on 18.5%. In 2005-2018 number of central district hospitals and district hospitals decreased in 2.5 times. At that, provision of beds in municipalities of rural areas decreased from 49.6 to 38.8%oo. There significant winding up of district hospitals and their restructuring into branches of central district hospitals occurred. In 2018, remained only 47 out of them equipped with 1549 beds. Unfortunately, the reporting forms of the Ministry of Health of the Russian Federation do not account branches of central district hospitals. This information is to be included in accountability of the Ministry of Health.It is necessary to expand scope of authority of local government bodies in resolving medical and social problems in rural territories.

[THE AGE-RELATED FEATURES OF THE MORBIDITY OF THE POPULATION IN THE CONTEXT OF THE COVID-19 PANDEMIC].

The COVID-19 pandemic has led to changes in all medical and demographic indicators, including changes in the incidence of the population. The article provides an analysis of the age characteristics of the primary morbidity of the population in the conditions of the COVID-19 pandemic. A pattern has been determined: the highest rates of primary morbidity in the conditions of the COVID-19 pandemic (for 2020) were determined in the age group older than working age. It was in this group that the highest incidence rates of COVID-19 were established. On the contrary, a comparative analysis of the primary morbidity of children (0-14 years old) in Russia as a whole in the «pre-pandemic¼ year (2019) and in the conditions of the COVID-19 pandemic (2020) showed a decrease in the level of this indicator by 13.9% (from 172455.1 to 148537.7 per 100 thousand population, р < 0.05). Among the child population, 1208.3‱ cases of COVID-19 were registered. Thus, in the Central Federal District, the indicators of primary morbidity of children were lower than the general.

Measurement of Compton Scattering at MAMI for the Extraction of the Electric and Magnetic Polarizabilities of the Proton.

A precise measurement of the differential cross sections dσ/dΩ and the linearly polarized photon beam asymmetry Σ_{3} for Compton scattering on the proton below pion threshold has been performed with a tagged photon beam and almost 4π detector at the Mainz Microtron. The incident photons were produced by the recently upgraded Glasgow-Mainz photon tagging facility and impinged on a cryogenic liquid hydrogen target, with the scattered photons detected in the Crystal Ball/TAPS setup. Using the highest statistics Compton scattering data ever measured on the proton along with two effective field theories (both covariant baryon and heavy-baryon) and one fixed-t dispersion relation model, constraining the fits with the Baldin sum rule, we have obtained the proton electric and magnetic polarizabilities with unprecedented precision: α_{E1}=10.99±0.16±0.47±0.17±0.34, ß_{M1}=3.14±0.21±0.24±0.20±0.35; in units of 10^{-4} fm^{3} where the errors are statistical, systematic, spin polarizability dependent, and model dependent.

[The results and perspectives of primary health care reforming in Moscow].

The primary health care is characterized by its directivity to population health, while general practitioner is key figure in its organization and is responsible for assigned population health. The Russian Federation continues to suffer from overspecialization of medical care in outpatient health care. At that, the number of unreasonable visits to medical specialists is too high. The general practitioner, with appropriate training, can appoint patients by 11 specialties and in conditions of municipal polyclinic can undertake up to 81% of visits to medical specialists. The purpose of the study is to evaluate primary health care functioning in Moscow and to formulate proposals for reforming health care, considering development of general medical practices in a metropolis. The study was focused on analysis of morbidity of population of Moscow, on support of out-patient health care with physicians before and after implementation of three-level system of ambulatory polyclinic care, on evaluation of preventive activities of general practitioners and on development of proposals for improving organizational forms of activities with emphasis on health preservation. In the study were applied such methods as statistical, direct observation, sociological. The analysis was applied to forms of federal statistical observation i.e. form № 30 in Moscow and the Russian Federation for 2010-2019. The population sociological surveys concerning satisfaction with medical care were carried out. The research base was Moscow. The analysis demonstrated that results of Moscow health care system reformation is economically effective because of shortage of medical personnel primarily of administrative staff and its rational employment. The reformation results were positively assessed by patients, whose satisfaction with medical care made up to 95.6%. The general practitioner is to be responsible for health status of attached population and is called upon not only to carry out treatment and preventive activities, but also to coordinate organization of medical care of attached population at all stages of its provision. The implementation of general medical practice in conditions of municipality is to calculate complete transition of medical organizations providing out-patient medical care to general medical practice, that will result to certain extent, in reduction of staff positions of medical specialists. It is necessary to expand duties of medical nurse in general practice. The optimal model of joint work of general practitioner with feldsher and medical nurse of general practice. The complex general practice team can include medical registrar. The proposed perspective models permit to implement integrating role of general practitioner and to increase accessibility and efficiency of primary health care.

Single π 0 production off neutrons bound in deuteron with linearly polarized photons.

The quasifree γ → d → π 0 n ( p ) photon beam asymmetry, Σ , has been measured at photon energies, E γ , from 390 to 610 MeV, corresponding to center of mass energy from 1.271 to 1.424 GeV, for the first time. The data were collected in the A2 hall of the MAMI electron beam facility with the Crystal Ball and TAPS calorimeters covering pion center-of-mass angles from 49 ∘ to 148 ∘ . In this kinematic region, polarization observables are sensitive to contributions from the Δ ( 1232 ) and N(1440) resonances. The extracted values of Σ have been compared to predictions based on partial-wave analyses (PWAs) of the existing pion photoproduction database. Our comparison includes the SAID, MAID and Bonn-Gatchina analyses; while a revised SAID fit, including the new Σ measurements, has also been performed. In addition, isospin symmetry is examined as a way to predict π 0 n photoproduction observables, based on fits to published data in the channels π 0 p , π + n and π - p .

[The medical social characteristics and evaluation of life quality of patients with diseases of blood circulation system].

The increasing of longevity and quality of life and population health are considered as the most important component of human development index. The diseases of blood circulation system have leading rank in morbidity, disability and mortality of population of Russia representing one of the most actual problems of health care. The diseases of circulatory system negatively effect on physical and mental health, emotional conditions and social components of life activities. All the mentioned results related to cardiovascular diseases can be detected and measured through evaluation of indices of life quality of patients. In Russia, the directive documents and national programs concerning health care modernization were adopted to rectify the unfavorable medical demographic situation on national level through decreasing of mortality, morbidity and disability due to diseases of circulation system. The purpose of the study is to analyze social hygienic characteristic and life quality of patients with diseases of circulation system during 5 years prospective cross-sectional medical statistical study in the Nizhni Novgorod Oblast at the base of the "Specialized Cardio-surgery Clinical Hospital" of Nizhni Novgorod. The study included all patients with certain corresponding criteria of involvement being at hospital treatment in the pilot medical organization. The sampling included 420 patients. The life quality inventory SF-36 and questionnaire were applied to respondents during their first and control (5 years later) visits. The questionnaire covered social and working status, presence of risk factors of cardiovascular diseases. The study demonstrated that among respondents made no control of cholesterol level 40.3%, arterial blood pressure - 16% that determines necessity of amelioration of sanitary education activities of population. The low level of income (less than 6000 rubles per one member of family) was marked by 42% of respondents. At that, 77% had financial problems with medications purchasing that testifies necessity in co-financing with the state. The results of the study testify the positive impact of implementation of target programs of prevention of cardiovascular diseases on the life quality of patients in the pilot subject of The Russian Federation. The original technique of sociological surveys and evaluation of life quality of patients can be applied at the regional level in development of managerial decision making.

[Organizational reserves saving the population's health from diseases of the circulatory system].

Modern approaches to public health protection in the world are increasingly focused on health conservation, which involves focusing health care efforts on prevention. Timely identification of patients with arterial hypertension (AH) and provision of effective medical care is the main organizational reserve for preventing health losses. Based on the concept of "cardiovascular continuum", analysis of literature sources and the study itself, organizational measures have been developed to preserve health and prevent health losses and reduce mortality from diseases of the circulatory system. From the perspective of the concept of "cardiovascular continuum", the causes of death from BSC are two parallel interrelated processes: arterial hypertension and atherosclerosis, which are the consequences of endothelial dysfunction. Analysis of literature sources and survey results 123 of experts and healthcare professionals in a number of subjects of the Russian Federation show that adequate and timely medical care to the population at BSK, and a reduction in population systolic blood pressure and the reduction of lepidopteron low-density (LDL) are organizational reserves predotvratit loss health and reduce mortality from CVD. We have developed a set of measures to reduce mortality from circulatory diseases in accordance with the concept of the "cardiovascular continuum" include the following: increase population coverage with BSK medical assistance; medical surveillance and treatment of patients with prehypertension; decreased population levels of cholesterol in arterial hypertension (AH); carrying out of thrombolytic therapy; medical emergency cardiovascular conditions in accordance with the concept of "Golden hour"; improving the provision of medicines to the population, increasing the provision of cardiologists to the population. The implementation of a set of measures in the pilot rural district allowed reducing the total mortality of the population for the year of analysis by 12%.

Helicity-Dependent Cross Sections for the Photoproduction of π

The double-polarization observable E and helicity-dependent cross sections σ_{1/2}, σ_{3/2} have been measured for the photoproduction of π^{0} pairs off quasifree protons and neutrons at the Mainz MAMI accelerator with the Crystal Ball/TAPS setup. A circularly polarized photon beam was produced by bremsstrahlung from longitudinally polarized electrons and impinged on a longitudinally polarized deuterated butanol target. The reaction products were detected with an almost 4π covering calorimeter. The results reveal for the first time the helicity- and isospin-dependent structure of the γN→Nπ^{0}π^{0} reaction. They are compared to predictions from reaction models in view of nucleon resonance contributions and also to a refit of one model that predicted results for the proton and for the neutron target. The comparison of the prediction and the refit demonstrates the large impact of the new data.

Conservative treatment of Osgood-Schlatter disease among young professional soccer players.

BACKGROUND: The present-day conservative treatment algorithms of Osgood-Shlatter Disease (OSD) are often inadequate for young athletes because they require extremity immobilization and avoidance of sports, and hence the longer duration of rehabilitation. Therefore, the development of safe and efficacious treatment protocols for young athletes is of great practical importance. THE AIM OF THE STUDY: The aim of the study was to assess the efficacy and safety of the conservative treatment of Osgood-Schlatter disease in young professional soccer players. MATERIALS AND METHODS: Medical records of young soccer players from two different Russian soccer-academies from the period January 2016-July 2019 were analyzed in a retrospective cohort study. Trauma records of young soccer players aged 11-15 years were included in the analysis. Statistical analysis was performed using IBM SPSS Statistics software, 23.0. Descriptive statistics tools were applied for the analysis. RESULTS: A total of 280 soccer players were included in the study. The aged ranged between 11 and 15 years. Ten percent of players (n = 28, mean age 12.9 ± 1.3) were diagnosed with OSD during the observation period. The mean OSD treatment duration was 27.3 ± 13.9 days. Bilateral symptoms were observed in 42.9% of cases, and unilateral symptoms in 57.1%. In 53.6% of players, the first manifestation of OSD symptoms was observed during wintertime. All players were training on artificial turf playing fields. Conservative treatment without immobilization was applied to all patients. It included kinesiotherapy for quadriceps muscle lengthening and physiotherapy as well as gradual increase of physical activity. A total of 35.7% of players reported having discomfort upon resuming regular training, which caused some restrictions in exercise. However, the symptoms resolved spontaneously with time. Surgical treatment or complete avoidance of exercise was not used in any of the patients. CONCLUSION: High incidence of OSD was revealed among young soccer players of the leading Russian soccer academies. The OSD most commonly occurred during wintertime. Conservative treatment of OSD-i.e., physiotherapy and kinesiotherapy-enabled disease-free resuming of sports activity for the majority of patients.

Signatures of the d

We report a measurement of the spin polarization of the recoiling neutron in deuterium photodisintegration, utilizing a new large acceptance polarimeter within the Crystal Ball at MAMI. The measured photon energy range of 300-700 MeV provides the first measurement of recoil neutron polarization at photon energies where the quark substructure of the deuteron plays a role, thereby providing important new constraints on photodisintegration mechanisms. A very high neutron polarization in a narrow structure centered around E_{γ}∼570 MeV is observed, which is inconsistent with current theoretical predictions employing nucleon resonance degrees of freedom. A Legendre polynomial decomposition suggests this behavior could be related to the excitation of the d^{*}(2380) hexaquark.

[The analysis if disability because of diseases of blood circulation system in the Nizhny Novgorod oblast].

The article presents the analysis of disability on the cardiovascular diseases, according to the Bureau of Medical and Social Expertise in the Nizhny Novgorod region in dynamics for 2003-2013. The article analyzed the number of persons recognized as disabled according the Bureau of Medical and Social Expertise, calculated accumulated contingent disabled due to cardiovascular diseases according to the pension fund. The years of life lost due to disability in dynamics were calculated for 2004-2013 years.

Insight into the Narrow Structure in η Photoproduction on the Neutron from Helicity-Dependent Cross Sections.

The double polarization observable E and the helicity dependent cross sections σ_{1/2} and σ_{3/2} were measured for η photoproduction from quasifree protons and neutrons. The circularly polarized tagged photon beam of the A2 experiment at the Mainz MAMI accelerator was used in combination with a longitudinally polarized deuterated butanol target. The almost 4π detector setup of the Crystal Ball and TAPS is ideally suited to detect the recoil nucleons and the decay photons from η→2γ and η→3π^{0}. The results show that the narrow structure previously observed in η photoproduction from the neutron is only apparent in σ_{1/2} and hence, most likely related to a spin-1/2 amplitude. Nucleon resonances that contribute to this partial wave in η production are only N 1/2^{-} (S_{11}) and N 1/2^{+} (P_{11}). Furthermore, the extracted Legendre coefficients of the angular distributions for σ_{1/2} are in good agreement with recent reaction model predictions assuming a narrow resonance in the P_{11} wave as the origin of this structure.

Interaction of Serum Antibodies from Breast Cancer Patients with Synthetic Peptides.

The blood serum of tumor patients contains antibodies recognizing tumor-associated antigens and other molecular products of tumor growth. We studied the interaction of blood antibodies from breast cancer patients with synthetic peptides that were applied on the microchip surface. The serum from healthy volunteers and breast cancer patients was shown to contain antibodies that interact with various peptides. Statistically significant between-group differences were observed in the level of binding with 122 informative peptides (0.01% of the total number of peptides on a microchip). Analysis of antibodies that interact with the peptide panel holds much promise for the diagnostics of breast cancer.

[Study of arginase activity of mixed saliva in cancer].

The aim of the study was to investigate the activity of arginase of mixed saliva with the subsequent application of the results obtained in clinical laboratory diagnostics. Arginine metabolic parameters were studied in particular arginase activ- ity, concentration of nitric oxide, urea and uric acid. There was found a three-fold increase of arginase activity and a four- fold reduction of nitric oxide in mixed saliva of patients on the background of cancer. There was established inverse rela- tionship between arginase activity and nitric oxide as well as between the concentration of urea and nitrogen oxides. Basic possibility of differential diagnosis of benign and malignant neoplastic disease was showed .using chemometric methods. Imbalance of arginase activity and nitric oxide in the saliva of cancer patients could be an important diagnostic and prog- nostic criterion.