Muscle trematode infection of alien cyprinids in the basin of the Middle Ob (Sibiria, Russia)

The book represents proceedings of Sixth International Symposium “Invasion of Alien Species in Holarctic. Borok -VI” (11 Oct. – 15 Oct. 2021, Borok – Uglich, Russia). The wide spectrum of problems related to appearance and spread of invasive plants and animals is discussed. The book may be interested for specialists in many fields, such as limnologists, hydrobiologists, ecologists, botanists, zoologists, geographers, managers of dealing with nature preservation and fisheries

Wetting of Superfluid 4He by Liquid 3He

We have investigated optically the spreading of He3 on top of the He4-rich solution in phase-separated helium-mixture films, 20-50 μm thick. In equilibrium, the He3 layer wets the He4-rich phase completely, but nearly circular or stripelike pools of He3-rich phase are stabilized instead when He4 atoms are condensed to the liquid sample at the rate 10 exp 15-5 × 10 exp 15 atoms/cm2s. For the contact angle we obtain about 10 mrad, which suggests a fractional change of the He3 surface tension by a factor of 10 exp −5 from the equilibrium value.Peer reviewe

Methodology of identifying critical objects of infrastructure

This work is aimed at creating of methodology of identifying critical objects of infrastructure. Various infrastructure - a guarantee a successful existence of any state. The main vulnerability of infrastructures - are critical elements within their structure. Failure of critical element leads to a significant drop in efficiency of functioning of infrastructure. Therefore, security of critical infrastructure elements is the basis for the security of infrastructure. Infrastructure have been considered as non-deterministic complex systems that enter interaction with their environment and consist of a large number of objects and relations between them. Methods of system analysis and system engineering were the main instruments of research infrastructures in this paper. The developed methodology involves three major stages: decomposition, analysis and synthesis. All necessary information about the infrastructure will be obtained by performing these stages. Methodology allows us to study any infrastructure from side of its functions and from side of its structure. The result of research of infrastructure by this method should be full infrastructure model that accurately represents structure and functioning of infrastructure. This model is sufficiently complete for using by specialists in the development of recommendations for improvements in the safety of critical objects of infrastructure. The methodology is simple and not labor that allows verifying vulnerability of infrastructure in the shortest time

Preprofile and specialized education of pupils in professional education system

Представлена практика Центра по профессиональной ориентации и содействия трудоустройству ГАПОУ СО «ЕПТТ им. В.М. Курочкина» на основе преемственности общего и профессионального образования, действующего на принципах сетевого взаимодействия образовательных учреждений, организаций и предприятий. Обращается внимание на значение предпрофильной подготовки обучающихся основной школы с использованием элективных курсов и профессиональных проб.The practice of the Centre of professional orientation and assistance to the employment of CO GAPOU "EPTT them. named after VM Kurochkin" is presented here, on the basis of continuity of general and professional education, working on the principles of network interaction of educational institutions, organizations and enterprises. The special attention is drawn to the importance of preprofile training of students with elective courses and professional trials

Observations on Superfluid Meniscus in Rotating 3He-B

The parabolic superfluid meniscus has been seen for states in which only (1) the normal or (2) the superfluid component of 3He-B rotates. A reduced, temperature-dependent meniscus (1) was formed at small speeds Ω≲0.21 rad /s. A deeper-than-expected meniscus (2) was observed after a rapid halt of the cryostat, when the normal fluid stops during a short relaxation time, followed by slow decay of the superfluid circulation. The depth of the meniscus (2) was explained by a reactive radial force between the rotating superfluid and the stationary normal liquid.Peer reviewe

ИЗУЧЕНИЕ МИКРОБНО-ТКАНЕВОГО КОМПЛЕКСА КИШЕЧНИКА У БОЛЬНЫХ АТОПИЧЕСКИМ ДЕРМАТИТОМ В РАЗЛИЧНЫЕ ПЕРИОДЫ ТЕЧЕНИЯ ДЕРМАТОЗА

It was examined 40 patients with atopic dermatitis in various stages of the clinical course of dermatosis. It has revealed typical endoscopic changes of the gastrointestinal tract in patients with atopic dermatitis in quiescent and acute stages. It has studied the cellular composition of infiltrates and histomorphology of mucous coat of stomach and distal part of sigmoid colon. It has found the generic dysbiotic malfunctions of intestinal microflora in different periods of the clinical course of dermatosis. It is suggested an assumption about the relations between morphological changes of mucous coat of stomach and distal part of sigmoid colon in patients with atopic dermatitis with symtomatic dysbiotic disorders of the intestine and the severity of skin lesions in atopic dermatitis.Обследовано 40 пациентов с атопическим дерматитом в различные стадии течения дерматоза. Выявлены типичные эндоскопические изменения желудочно-кишечного тракта у больных атопическим дерматитом в стадии ремиссии и обострения. Изучены клеточный состав инфильтратов и гистоморфология слизистой оболочки желудка и дистальных отделов сигмовидной кишки. Обнаружены характерные дисбиотические нарушения микрофлоры кишечника в различные периоды течения дерматоза. Сделано предположение о связи морфологических изменений слизистой оболочки желудка, дистальных отделов сигмовидной кишки у больных атопическим дерматитом с выраженными дисбиотическими нарушениями кишечника и с тяжестью поражения кожи при атопическом дерматите

The role of non-commercial cyprinids in maintenance and spread of the opisthorchiasis focus in the middle Ob River basin (Tomsk region, Russia)

The study assessed the role of non-commercial cyprinid species in maintaining the opisthorchiasis focus in the middle Ob River basin, Tomsk region, Russia. The source of O. felineus infection for humans and carnivores is fish of the family Cyprinidae. This is the most numerous family, 14 species live in the middle Ob River basin, which includes 6 commercial species and 8 non-commercial species. This study aimed to investigate the current situation on infestation of non-commercial cyprinids with O. felineus metacercariae and their role in maintaining and spreading the natural focus of opisthorchiasis in the middle Ob River basin. We investigated 4 non-commercial species (tench, sunbleak, common bleak, gudgeon), which are highly abundant in water bodies. Tench, common bleak and gudgeon are objects of amateur fishing. These species are traditionally included in the diet of the local population. Opisthorchis felineus metacercariae were recorded in muscles of all the examined fish species. The identification of metacercariae was confirmed by morphological methods and PCR diagnostics. Tench and sunbleak are the main sources of opisthorchiasis infection in the floodplain lakes of the Ob River basin (the prevalence of tench infection is 89.3% and mean intensity of infection is 11.2 metacercariae per fish, the prevalence of sunbleak infection is 50.9% and the intensity of infection is 4.25 metacercariae per fish). The prevalence of infection in the introduced common bleak from the rivers of the middle Ob River basin is rapidly increasing from 2.4 (2016-2018) to 37.5% (2020-2021), and mean intensity of infection increased from 1 to 4.15. The epizootic state of water bodies in the middle Ob River basin remains unfavorable in relation to opisthorchiasis. Tench, common bleak and sunbleak, along with ide and dace, are the main source of infection for humans and animals, which is evidenced by high infection with Opisthorchis felineus metacercariae in these numerous fish species. They pose the greatest danger of infection of people and animals with opisthorchiasis. These species should be included in the campaign to avoid raw and poorly cooked fish in the diet. In addition, such species as roach, bream and sunbleak also pose the danger of infection with opisthorchiasis, but to a lesser extent