Autor: Nikitina, A. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Mathematical model of deformation of railway sleeper track structure with the step change of stiffness on the elastic winkler foundation of the constant stiffness
Matematicheskaja model' deformacii rel'coshpal'nojj reshetki so stupenchatym izmeneniem zhestkosti na uprugom vinklerovom osnovanii postojannojj zhestkosti
Autorzy:: Slobodyanyuk, M.
Nikitina, A.
Nechayev, G.
Rakovskaya, N.
Powiązania:: https://bibliotekanauki.pl/articles/793557.pdf
Data publikacji:: 2014
Wydawca:: Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:: rolling stock
railway
stiffness
railway sleeper track structure
elastic foundation
deformation
deflection
cross-section
mathematical model
equation
Źródło:: Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2014, 14, 2
1641-7739
Pojawia się w:: Teka Komisji Motoryzacji i Energetyki Rolnictwa
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Environmental status of the Arctic soils
Autorzy:: Nikitina, M.
Popova, L.
Korobitcina, J.
Efremova, O.
Trofimova, A.
Nakvasina, E.
Volkov, A.
Powiązania:: https://bibliotekanauki.pl/articles/15937.pdf
Data publikacji:: 2015
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:: environmental status
Arctic soil
soil
agrochemical parameter
heavy metal
Opis:: The Arctic region is under an ever-increasing anthropogenic influence. The nature in the Arctic is extremely vulnerable to the effects of pollutants, which may eventually lead to certain irreversible ecological processes. Heavy metals occupy a special place among priority pollutants. Therefore, the aim of this study has been to assess the ecological status and the degree of contamination with heavy metals of the soils of Arctic and sub-Arctic areas. Arctic soils were studied in the region of the White Sea and the Barents Sea during the Arctic Floating University, a research expedition held in July 2012 by M. Lomonosov Northern (Arctic) Federal University. During the expedition, samples were collected and the landscapes (topography, vegetation) were described. In order to assess the impact of environmental contamination, the total content of heavy metals in soils was evaluated by X-ray fluorescence analysis (XRF). The level of soil contamination was assessed according to the maximum permissible concentrations ( MPC), temporary permissible concentrations (TPC), chemical substance factor (Kc) and the total pollution index (Zc). Our analysis of the experimental data showed a wide-range change in the soil agrochemical parameters. It has been demonstrated that the investigated soils of the Arctic and sub-Arctic areas represent different soil properties, are affected by different climatic conditions and belong to different texture taxonomic classes, e.g. the grain-size distribution varies from sand to clay loam; the pH ranges from strongly acid to neutral and the content of organic substances can be very low to high. According to the total pollution index, almost all the soils present an acceptable heavy metal contamination level. In most of the studied soils, the heavy metals in terms of amounts accumulated can be ordered as follows: Co > Pb > Cu > Zn > As > Ni > V > Mn.
Źródło:: Journal of Elementology; 2015, 20, 3
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Modern methods of aspergillosis diagnosis and biotechnological approaches to creation of allergy / aspergillosis diagnostic preparations
Autorzy:: Savchenko, Alina A.
Nikitina, Ekaterina I.
Galkin, Alexander Yu.
Dechtiarenko, Natalie V.
Powiązania:: https://bibliotekanauki.pl/articles/1032499.pdf
Data publikacji:: 2014
Wydawca:: Uniwersytet Kazimierza Wielkiego w Bydgoszczy
Tematy:: aspergillosis
allergy
diagnostics
preparations
biotechnology
Opis:: Fungi of the Aspergillus genus are widely distributed in nature, including more than 300 species, but only a few of them are pathogenic for humans and animals. Aspergillus can grows on organic substrates in soil, on plants. Spores are constantly present in air, and with it food, household items, outer integument and mucous person causing the disease to cause aspergillosis. When aspergillosis usually affects the respiratory system, in some cases, skin, kidneys, brain, eyes. Invasive pulmonary aspergillosis is associated with high mortality. In recent years, the number of cases has increased. At risk are people with immune deficiencies. Crucial in the fight against this disease promptly started playing antifungal therapy and early diagnosis. When selecting tests are important technical and economic indicators of the complexity or simplicity the study, its reproducibility, the applicability of automated screening and cost analysis. In the present article we have analyzed and compared different methods for aspergillosis diagnostics. Biotechnological approaches for development of allergy/aspergillosis diagnostic preparations also have been discussed.
Źródło:: Journal of Health Sciences; 2014, 4, 1; 363-374
1429-9623
Pojawia się w:: Journal of Health Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: The psychological and emotional state of patients with type 2 diabetes mellitus on the background of excessive body weight
Autorzy:: Velichko, V. I.
Nikitina, V. I.
Said, E. V.
Amirova, A. Yu.
Powiązania:: https://bibliotekanauki.pl/articles/765447.pdf
Data publikacji:: 2017
Wydawca:: Uniwersytet Mikołaja Kopernika w Toruniu. Wydział Nauk o Ziemi i Gospodarki Przestrzennej. Katedra Kultury Fizycznej
Tematy:: diabetes mellitus type 2, overweight, depressive disorders, anxiety disorders, psychoemotional status
Opis:: In the work, we studied the parameters of the psychological and emotional state of patients with type 2 diabetes mellitus on the background of excessive body weight. Psychological and emotional state studies were conducted using the Patient Health Questionnaire-PHQ-9, questionnaire the hospital scale of anxiety and depression (HADS). A comparison of the frequency of occurrence of anxiety-depressive disorders and the study of the degree of their severity in the patients under study. The study revealed that negative changes in the indicators of psychological and emotional state in patients with type 2 diabetes are six times more likely than in healthy people.
Źródło:: Journal of Education, Health and Sport; 2017, 7, 3
2391-8306
Pojawia się w:: Journal of Education, Health and Sport
Dostawca treści:: Biblioteka Nauki

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