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Tytuł:
Deciphering the soybean molecular stress response via high-throughput approaches
Autorzy:
Tyczewska, Agata
Gracz, Joanna
Kuczyński, Jakub
Twardowski, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/1038715.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
soybean
transcriptome
miRNA
proteome
stress conditions
Opis:
As a result of thousands of years of agriculture, humans had created many crop varieties that became the basis of our daily diet, animal feed and also carry industrial application. Soybean is one of the most important crops worldwide and because of its high economic value the demand for soybean products is constantly growing. In Europe, due to unfavorable climate conditions, soybean cultivation is restricted and we are forced to rely on imported plant material. The development of agriculture requires continuous improvements in quality and yield of crop varieties under changing or adverse conditions, namely stresses. To achieve this goal we need to recognize and understand the molecular dependencies underlying plant stress responses. With the advent of new technologies in studies of plant transcriptomes and proteomes, now we have the tools necessary for fast and precise elucidation of desirable crop traits. Here, we present an overview of high-throughput techniques used to analyze soybean responses to different abiotic (drought, flooding, cold stress, salinity, phosphate deficiency) and biotic (infections by F. oxysporum, cyst nematode, SMV) stress conditions at the level of the transcriptome (mRNAs and miRNAs) and the proteome.
Źródło:
Acta Biochimica Polonica; 2016, 63, 4; 631-643
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Prokaryotic toxin-antitoxin systems - the role in bacterial physiology and application in molecular biology
Autorzy:
Bukowski, Michal
Rojowska, Anna
Wladyka, Benedykt
Powiązania:
https://bibliotekanauki.pl/articles/1039939.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
bacteria physiology
toxin-antitoxin systems
environmental stress conditions
antibiotic resistance
Opis:
Bacteria have developed multiple complex mechanisms ensuring an adequate response to environmental changes. In this context, bacterial cell division and growth are subject to strict control to ensure metabolic balance and cell survival. A plethora of studies cast light on toxin-antitoxin (TA) systems as metabolism regulators acting in response to environmental stress conditions. Many of those studies suggest direct relations between the TA systems and the pathogenic potential or antibiotic resistance of relevant bacteria. Other studies point out that TA systems play a significant role in ensuring stability of mobile genetic material. The evolutionary origin and relations between various TA systems are still a subject of a debate. The impact of toxin-antitoxin systems on bacteria physiology prompted their application in molecular biology as tools allowing cloning of some hard-to-maintain genes, plasmid maintenance and production of recombinant proteins.
Źródło:
Acta Biochimica Polonica; 2011, 58, 1; 1-9
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
METHOD VALIDATION AND STABILITY STUDIES OF DIFFERENTIAL ACTIVITY OF HYDROXYPROPYL-β-CYCLODEXTRIN AND HYDROPHILIC CARRIERS OF CARVEDILOL.
Autorzy:
Boakye-Yiadom, Kofi O.
Kesse, Samuel
Korto, Kwabena
Sarkodie, Emmanuel K.
Baidoo, Sarah A.
Filli, Mensura S.
Wang, Bo
Powiązania:
https://bibliotekanauki.pl/articles/895503.pdf
Data publikacji:
2020-07-10
Wydawca:
Polskie Towarzystwo Farmaceutyczne
Tematy:
method validation
Carvedilol
stress conditions
solid dispersion
percentage degradation
reverse phase liquid chromatography
Opis:
Stability studies of the formulations of CAR solid dispersions were analyzed at 300C/65%RH for a period of three months. A simple reverse phase HPLC was developed and validated for the quantification of CAR solid dispersions. Chromatographic separation was achieved on Waters Atlantis dC18 (4.6 X 150mm) column with a mobile phase consisting of 0.033M phosphate buffer and methanol (35:65). The mobile phase was filtered using an organic filter paper and sonicated for about 20 min. The flow rate was 1ml/min and 242nm wavelength was used for detection. Force degradation studies were conducted under three conditions namely; acidic, basic and hydroxide peroxide conditions. With the HPLC linearity concentration was in the range of 5-80μg/ml with a correlation coefficient (R2) of 0.9995. There was no interference with drug carriers. The suggested reverse phase HPLC methodology is simple, selective, linear and robust in quantifying the amount of CAR in the various solid dispersion samples. In hydrogen peroxide a degraded product was found on the chromatogram unlike that of the acidic and basic conditions. Degradation occurred more strongly in the acidic condition than in the basic condition. The binary systems were less stable than the ternary system solid dispersions due to the presence of HP-β-CD.
Źródło:
Acta Poloniae Pharmaceutica - Drug Research; 2020, 77, 3; 423-430
0001-6837
2353-5288
Pojawia się w:
Acta Poloniae Pharmaceutica - Drug Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The mechanism of roadway deformation in conditions of laminated rocks
Autorzy:
Khalymendyk, I.
Baryshnikov, A.
Powiązania:
https://bibliotekanauki.pl/articles/91973.pdf
Data publikacji:
2018
Wydawca:
Główny Instytut Górnictwa
Tematy:
chodnik
warunki dużych naprężeń
współczynnik naprężenia
anizotropia wytrzymałości
konwergencja pionowa
roadway
high stress conditions
stress ratio
strength anisotropy
wedge of rocks extrusion
vertical convergence
Opis:
The high stress condition of the rock mass requires a change in the approach to the design and usage of roadway support. It is necessary to take into account the mutual deformations of the "support - rock mass" system, as well as the peculiarities of the deformation mechanism of the roadway rock contour. The purpose of this paper is to analyze the mechanism of roadway deformation in conditions of laminated rocks and "deep mine". A simple approach to the analysis of stress distribution around the roadway that includes Kirsch equations is used. It is shown that the strength anisotropy determines the weakest place in the roadway contour, where destruction takes place. The deformation of the rock mass around a single roadway occurs in the form of extrusion wedges of laminated rocks in the roof and floor is also show. The results of in-situ observations over the displacement of the roof and the floor of "deep mine" roadways are analyzed. The linear correlation between roof sag and floor heave is established. It is stressed that roof sag must be prevented in order to effectively counteract the extrusion of the floor rock.
Źródło:
Journal of Sustainable Mining; 2018, 17, 2; 41-47
2300-1364
2300-3960
Pojawia się w:
Journal of Sustainable Mining
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mathematical modeling of the stress-strain state of the annular preventer seal using the theory of reinforced shells
Autorzy:
Grydzhuk, Jaroslav
Chudyk, Ihor
Slabyi, Orest
Mosora, Yurii
Kovbaniuk, Mariana
Krynke, Marek
Powiązania:
https://bibliotekanauki.pl/articles/26073542.pdf
Data publikacji:
2022
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
pierścieniowy zawór odcinający
wzmocniona powłoka
kombinowana uszczelka gumowo-metalowa
stan naprężenia-odkształcenia
annular preventer
reinforced shell
combined rubber-metal seal
stress-strain conditions
Opis:
Management of wells in the process of their construction is one of the important factors in ensuring the safety of the technological process. Blowout equipment, which includes annular preventers, is used to control the wells. This applies to the construction of oil and gas wells, or wells that provide degassing of coal seams to reduce their gas-dynamic activity. For the purpose of safe and long-term operation of annular preventers on the basis of the theory of thick-walled combined reinforced shells and the carried-out analytical research, the mathematical model for research of a stress-strain condition of a seal of an annular preventer has been offered. Taking into consideration the real design, the seal of the annular preventer is modeled by a rubber shell, reinforced in the circular direction by rubber frames, and in the longitudinal direction by metal stringers. The mathematical model provides for determining the stiffness, internal force factors and stresses in the longitudinal and transverse sections of the combined rubber-metal seal, considering the peculiarities of its operation. At the same time, the model includes the conditions of interaction of the rubber base of the seal with a pipe, as well as the action of sealing pressure under operating conditions. The use of the proposed mathematical model reduces the costs of experimental research and will contribute to ensuring the reliability of simulation modeling results. The advantage of the method is the determination of calculated loads at different points of the combined seal under the existing state of dangerous zones and the influence of operating conditions. In the meantime, prerequisites have been created for expanding the possibilities of simulation modeling and designing structural elements of annular preventers with increased operational characteristics. The practical value of the obtained results is determined by the possibility of using them to ensure the performance of the rubber-metal seal both at the stage of its design and during the operation.
Źródło:
Production Engineering Archives; 2022, 28, 4; 375--380
2353-5156
2353-7779
Pojawia się w:
Production Engineering Archives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of solutions for microseismic focal mechanism estimation
Autorzy:
Wandycz, P.
Święch, E.
Pasternacki, A.
Powiązania:
https://bibliotekanauki.pl/articles/184552.pdf
Data publikacji:
2016
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
stress condition
strain conditions
subsurface
Opis:
One of the major advantages of microseismic data, recorded during hydraulic fracturing of prospective shale intervals is ability to use both P and S wave in the analysis, not only to determine epicentral locations of events but also to describe source itself. The information about the mechanisms of located microseismic events allows better understanding of in situ stress and strain conditions and the local subsurface geomechanical properties and forces (Kamei et al. 2015). As Duncan stated in his work, a proper characterization of the observed events mechanisms is the key to understand radiation pattern of the signals in the investigated area (Duncan & Eisner 2010). Moreover, an understanding of the nature of the rock failure supports reservoir simulation models and stimulated reservoir volume estimates (Kratz & Thorton 2016). Proper assessment of event strike, dip and rake provides the geometry of the fracture plane assuming double couple focal mechanism, while full moment tensor inversion provides information about shear and tensile nature of the calculated mechanisms. The common method to obtain reliable focal mechanisms of observed microseismic events is decomposing of the full moment tensor. Seismic moment tensor is powerful tool which provides a general mathematical solution of sources that can be used to distinguish between various types of microseismic events. The method comes to reliably estimation of the six independent components of a full moment tensor by lestsquares inversion (Eaton & Forouhideh 2010). The motivation for this analysis was to determine microseismic focal mechanisms based on P – wave peak amplitude, P and S – waves peak amplitudes and S – wave peak amplitude only to estimate the differences and uncertainties between these three different solutions. Furthermore authors decided to check how the mechanisms changes with different geometries of downhole monitoring array. In this study only synthetic data computed in MiVu GeoTomo software using raytracing method and simple layered velocity model were used. The mentioned velocity model was constructed based on well logs data delivered by PGNiG from measurements done in Northern Poland where active exploration of shale gas takes place. In this analysis authors focused only on double couple (DC) and compensated linear vector dipole (CLVD) mechanisms which are two most common types of microseismic focal mechanisms occur during hydraulic fracturing of shale deposits. Performed analysis proved that the best and most consistent results with the lowest uncertainties reflected in the condition number parameter can be obtained by using both P and S peak amplitudes.
Źródło:
Geology, Geophysics and Environment; 2016, 42, 1; 137-138
2299-8004
2353-0790
Pojawia się w:
Geology, Geophysics and Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sub-level stoping in an underground limestone quarry: an analysis of the state of stress in an evolutionary scenario
Wybieranie podpoziomowe wapienia w podziemnych kamieniołomach: analiza stanów naprężeń w scenariuszu rozwojowym
Autorzy:
Cardu, M.
Dipietromaria, S.
Oreste, P.
Powiązania:
https://bibliotekanauki.pl/articles/220245.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
eksploatacja podziemna
wybieranie podpoziomowe
stan naprężeń i odkształceń
współczynnik bezpieczeństwa
modelowanie numeryczne
metoda wybierania
underground exploitation
sub-level stoping
stress-strain conditions
safety factor
numerical modelling
mining method
Opis:
The aim of this study was to evaluate the state of stress of a „voids-pillar“ structure excavated by means of the sub-level stoping method in an underground limestone quarry near Bergamo (Italy). Both the current structure of the quarry (i.e. the rooms exploited till now) and a possible future scenario were analysed using the (FDM) FLAC 2D code. The quarry has been in operation since 1927; at present, exploitation is carried out underground via the sub-level stoping method. Exploitation involves two levels, with 5 rooms on the upper level and 9 rooms on the lower level. After analysing data obtained from laboratory and in situ tests carried out on rock samples and natural discontinuities, the geomechanical properties of the medium, knowledge of which is essential in order to establish the parameters that must be included in the numerical model, were evaluated. The implementation of three numerical models made it possible to study both the present conditions of quarry exploitation and the evolution of the exploited rooms, as well as a possible expansion involving a third level of rooms. Using the results obtained regarding the stress-strain present in the pillars, a potential change in room geometry was proposed aimed at reducing the stress state inside the pillars, decreasing plasticity and increasing overall quarry safety.
Celem pracy było zbadanie stanów naprężeń w strukturach składających się z filarów i pustek po wybieraniu wapienia w podziemnym kamieniołomie w pobliżu Bergamo (Włochy), metodą wybierania podpoziomowego. Zarówno obecna struktury kamieniołomu (komory powstałe po dotychczasowym wydobyciu) oraz możliwe scenariusze na przyszłość przeanalizowano przy użyciu kodu (FDM) FLAC 2D. Eksploatacja kamieniołomu trwa od 1972, w chwili obecnej wydobycie odbywa się pod ziemią, metodą wybierania podpoziomowego, na dwóch poziomach wybierania: 5 komór na poziomie wyższym i 9 komór – na niższym. Po analizie danych uzyskanych drogą testów laboratoryjnych oraz badania w terenie próbek skalnych i stref nieciągłości, określono właściwości geomechaniczne ośrodka niezbędne do obliczenia parametrów do modelu numerycznego. Implementacja trzech modeli numerycznych umożliwiła analizę zarówno obecnych warunków eksploatacji kamieniołomu, procesów zachodzących w wyeksploatowanych komorach, jak i projektowanie ewentualnego rozszerzenia wydobycia, w tym powstanie trzeciego poziomu. Wykorzystując otrzymane zależności naprężeń i odkształceń, zaproponowano zmiany w geometrii komór mające na celu obniżenie poziomu naprężeń w filarach, zmniejszenie ich podatności i ogólne podniesienie stanu bezpieczeństwa w kamieniołomie.
Źródło:
Archives of Mining Sciences; 2016, 61, 1; 199-216
0860-7001
Pojawia się w:
Archives of Mining Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analytical solution of mixed boundary value problems using the displacement potential approach for the case of plane stress and plane strain conditions
Autorzy:
Deb Nath, S. K.
Powiązania:
https://bibliotekanauki.pl/articles/266247.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
rozwiązanie analityczne
naprężenie płaskie
odkształcenie
wartość graniczna
analytical solution
displacement potential approach
plane stress and plane strain conditions
mixed boundary value problems
Opis:
Two elastic plate problems made of duralumin are solved analytically using the displacement potential approach for the case of plane strain and plane stress conditions. Firstly, a one end fixed plate is considered in which the rest of the edges are stiffened and a uniform load is applied to the opposite end of the fixed end. Secondly, a plate is considered in which all of the edges are stiffened and a uniform tension is applied at its both ends. Solutions to both of the problems are presented for the case of plane stress and plane strain conditions. The effects of plane stress and plane strain conditions on the solutions are explained. In the case of stiffening of the edges of the plate, the shape of the plate does not change abruptly, which is clearly observed in both of the cases. For the plane strain condition, the plates become stiffer in the loading direction as compared to the plane stress condition. For the plane strain condition, there is a significant variation of the normal stress component, σzz at different sections of the plate. The graphical results, clearly identify the critical regions of the plate for the case of the plane stress and plane strain condition.
Źródło:
International Journal of Applied Mechanics and Engineering; 2017, 22, 2; 269-291
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Work in stressful conditions in medical emergency system during the COVID-19 pandemic
Autorzy:
Wojtysiak, Katarzyna
Zielińska-Więczkowska, Halina
Powiązania:
https://bibliotekanauki.pl/articles/2082506.pdf
Data publikacji:
2022-06-20
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
COVID-19
pandemic
stress
emergency medical care system
paramedic
work conditions
Opis:
The pandemic caused a change in the way of providing healthcare services, limiting direct access to doctors, suspending planned treatments and medical consultations, but despite the risks and restrictions, the medical rescue system as a key element of health care for the society continues to function. The system provides medical assistance to patients in the most severe condition, both with a negative result for SARS-CoV-2, as well as with a positive or undiagnosed result. It is a review aimed at analyzing the most important psychological aspects of the work of emergency medical care system personnel during the COVID-19 pandemic. PubMed, Cochrane Library, and Google Scholar search were used to analyze the problem. The following keywords were used to search for information sources: paramedic, work, emergency medical care system, emergency department, ambulance service, COVID-19, pandemic, SARS-CoV-2, coronavirus. The articles were selected in terms of the psychological aspects of the work of the emergency medical care system personnel during the pandemic in 2020–2021. The psychosocial problems that come to the fore during a pandemic include increased levels of stress, anxiety, depression, burnout, emotional exhaustion, vicarious traumatization, and post-traumatic stress disorder. In the context of the increased risk of psychological problems due to pandemic, it is necessary to provide psychological support to the medical staff, both in terms of psychological support for the entire team and individually.
Źródło:
Medycyna Pracy; 2022, 73, 3; 241-250
0465-5893
2353-1339
Pojawia się w:
Medycyna Pracy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stany człowieka wpływające na jego niezawodność
Humans conditions which impact on their reliability at work
Autorzy:
Gembalska-Kwiecień, A.
Powiązania:
https://bibliotekanauki.pl/articles/113626.pdf
Data publikacji:
2016
Wydawca:
STE GROUP
Tematy:
niezawodność człowieka
stany człowieka
stres zawodowy
human reliability
employees conditions
professional stress
Opis:
W artykule został przedstawiono stany człowieka – pracownika, mające wpływ na jego niezawodność. Wiedza o treści i zakresie możliwości człowieka jest konieczna do poprawy bezpieczeństwa pracy. Po pierwsze służy do kształtowania środowiska pracy, tak by było ono dostosowane do tych możliwości. Po wtóre wpływa na zapewnienia warunków rozwoju tychże możliwości, aby nie zostały one niewykorzystane.
Following article presents employees conditions and its impact on their reliability. Knowledge about human’s capabilities is necessary to enhance safety at work. Firstly it serves developing a work environment which would be adapted to these capabilities. Secondly it impacts on providing conditions to enhancing mentioned capabilities, so they would not be wasted.
Źródło:
Systemy Wspomagania w Inżynierii Produkcji; 2016, 2 (14); 131-138
2391-9361
Pojawia się w:
Systemy Wspomagania w Inżynierii Produkcji
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The impact of the plate diameter on the determined value of the pre-compaction stress of samples made of silt soil
Wpływ średnicy stempla na wyznaczaną wartość naprężenia granicznego próbek wytworzonych z gleby pylastej
Autorzy:
Błażejczak, D.
Dawidowski, J. B.
Powiązania:
https://bibliotekanauki.pl/articles/93667.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Inżynierii Rolniczej
Tematy:
precompaction stress
methodology
conditions of deformation
gleba
naprężenie graniczne
metodyka
warunki odkształcania
Opis:
The objective of the paper was to investigate the impact of the plate diameter on the value of the measured pre-compaction stress of soil. The investigations were carried out on model samples with 100 mm diameter and 30 mm height made of the silt loam and the percentage moisture content of 13.7 and 21.9%. The following properties of the used material were measured: the granulation group, density of solid particles, humus content, reaction, plastic and liquid limit and the degree of saturation of samples. The samples were loaded with a testing machine using plates with varied diameters: 20, 30, 50, 70, 80, 90, 96, 98 and 99 mm. The pre-compaction stress value was measured with the method of searching for the crossing point of tangents with the secondary stress curve and original stress curve (a classic method). It was found out that for samples with saturation amounting to 13.7% of the moisture content the pre-compaction stress does not significantly depend on the plate diameter. For samples with saturation amounting to 21.9% of the moisture content the pre-compaction stress may significantly depend on the plate diameter. Based on the obtained results a conclusion was made that in the research on the pre-compaction stress with the method of uni-axial deformations, the relation of the plate diameter (d) to the diameter of the cylinder (D) should be within 0.3 ≤ d/D < 0.8.
Celem pracy było zbadanie wpływu średnicy stempla na wartość wyznaczanego naprężenia granicznego gleby. Badania przeprowadzono na próbkach modelowych o średnicy 100 mm i wysokości 30 mm, wytwarzanych z materiału glebowego o uziarnieniu pyłu gliniastego i wilgotnościach 13,7 oraz 21,9% wag. Oznaczono następujące cechy użytego materiału: skład granulometryczny, gęstość fazy stałej, zawartość próchnicy, odczyn, granicę plastyczności i płynności oraz obliczono stopień wilgotności próbek. Wytworzone próbki były obciążane za pomocą maszyny wytrzymałościowej stemplami o średnicach: 20, 30, 50, 70, 80, 90, 96, 98 i 99 mm. Wartość naprężenia granicznego gleby wyznaczano metodą poszukiwania punktu przecięcia stycznych do krzywej naprężeń wtórnych i krzywej naprężeń pierwotnych (metoda klasyczna). Stwierdzono, że dla próbek o wilgotności równej 13,7 % wag. naprężenie graniczne nie zależy istotnie od średnicy stempla. Dla próbek o wilgotności 21,9% wag. naprężenie graniczne może zależeć istotnie od średnicy stempla. Na podstawie uzyskanych wyników sformułowano wniosek, że w badaniach naprężenia granicznego metodą jednoosiowych odkształceń stosunek średnicy stempla (d) do średnicy cylindra (D) powinien mieścić się w przedziale 0,3 ≤ d/D < 0,8.
Źródło:
Agricultural Engineering; 2016, 20, 2; 5-14
2083-1587
Pojawia się w:
Agricultural Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Winter UTCI variability in Poland in the 21st century
Autorzy:
Wereski, Sylwester
Krzyżewska, Agnieszka
Dobek, Mateusz
Powiązania:
https://bibliotekanauki.pl/articles/946933.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
Tematy:
UTCI
Universal Thermal Climate Index
biothermal conditions
cold stress
winter season
Polska
Opis:
The study analyses spatial and temporal variability of the UTCI index during winter seasons in Poland in the 21st century. The most frequent UTCI thermal stress category was moderate cold stress with a frequency varying from 45.8% in Łeba (Coastal region) to 66.1% in Zielona Góra (Central region). In mountain areas, this class was less frequent (7.3-12.3%). The second most frequent class was strong cold stress with values from 11.1% in Zakopane (Carpathian region) to 43.4% in Suwałki (North-East region). In mountain areas, very strong cold stress and extreme cold stress occurred frequently (25.0-35.5% and 17.7-52.0%, respectively). Few cases of extreme cold stress were observed on other Polish stations. Thermoneutral zone was not recorded in the mountain area, although on other Polish stations its frequency ranged from 0.1% in Chojnice, Suwałki and Białystok located in northern part of Poland to 4.3% in Zakopane (Carpathian region).
Źródło:
Miscellanea Geographica. Regional Studies on Development; 2020, 24, 3; 128-137
0867-6046
2084-6118
Pojawia się w:
Miscellanea Geographica. Regional Studies on Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stress at work on drilling rigs in Poland in a 20-year research perspective: time as a determinant of the stress-at-work dynamics
Autorzy:
Leszczyńska, Irena
Powiązania:
https://bibliotekanauki.pl/articles/21375392.pdf
Data publikacji:
2023-11-13
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
work in difficult and dangerous conditions
prospective study
stress at work
stress dynamics
psychosocial burdens
work on drilling rigs
Opis:
Objectives: Adapting to stress over time is a process involving various cognitive and emotional assessments; it also depends on the objective situation related to working conditions, as well as on individual factors. The aim of this paper is to outline the dynamic nature of stress experienced by workers employed on oil rigs over a period of 20 years. The presented research is part of a larger project and concerns subjective stress. Material and Methods: Longitudinal studies included the analysis of data regarding the period of 1993–2014. They concerned 167 Polish oil rig workers, all men; the average age at the beginning of the study was 29 years. Each employee was surveyed at least 4 times over a period of 20 years at intervals of 4–6 years in the workplace. The subjective level of stress at work (based on the Subjective Job Evaluation Questionnaire) and the level of declared stress (based on the Stress Survey) were examined. Results: Oil rig workers show different adaptations to stress over a long term, depending on their subjective perception of stress. Baseline stress levels can vary from person to person over the years. The first group was characterized by high initial stress, but the stress decreased systematically over 20 years (“stress resisting”). Employees from the second group were characterized by low initial stress, but declared a systematic increase in stress in the same period (“stress sensitizing”). Finally, employees from the third group adapted to stress in a flexible way, with subjective stress being most strongly associated with objective stress (“flexible group”). Conclusions: The presented prospective study showed differences between the subjective levels of stress depending on the distinguished groups over 20 years, i.e., between-group and intra-group variability. The method of prospective research shows that the perception of stress at work is a dynamic process and it changes over time.
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2023, 36, 4; 477-492
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stres wśród pracowników starszych (1)
Psychosocial stress among elderly workers
Autorzy:
Widerszal-Bazyl, M.
Powiązania:
https://bibliotekanauki.pl/articles/179000.pdf
Data publikacji:
2008
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
stres
pracownik
warunki pracy
psychologia pracy
stress
worker
working conditions
psychology of work
Opis:
W artykule przedstawiono wybrane dane statystyczne wskazujące na starzenie się populacji i związany z tym wzrost odsetka starszych pracowników na rynku pracy. Dane te wskazują na konieczność zwrócenia uwagi na warunki pracy starszych pracowników. Na podstawie dostępnych badań scharakteryzowano specyfikę psychospołecznych warunków pracy starszych pracowników w zakresie: zadowolenia z pracy, spostrzeganych wymagań, kontroli, wsparcia społecznego, niepewności pracy, konfliktu praca-dom.
This article presents selected statistical data concerning the aging population and the related increase in the percentage of older workers in the labour market. These data indicate that it is necessary to focus on the working conditions of older workers. On the basis of available research some job characteristics of older workers are described: job satisfaction, perceived job demands, job control, social support at work, job insecurity and work-family conflict.
Źródło:
Bezpieczeństwo Pracy : nauka i praktyka; 2008, 6; 6-8
0137-7043
Pojawia się w:
Bezpieczeństwo Pracy : nauka i praktyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kompleksowa ocena psychospołecznych warunków pracy kierowców autobusów miejskich i dalekobieżnych
Psychosocial working conditions of urban and long-distance bus drivers
Autorzy:
Kapica, Łukasz
Najmiec, Andrzej
Baka, Łukasz
Powiązania:
https://bibliotekanauki.pl/articles/31342472.pdf
Data publikacji:
2022
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
psychospołeczne warunki pracy
wymagania pracy
kierowcy autobusów
stres
psychosocial working conditions
job demands
bus drivers
stress
Opis:
Celem badania przedstawionego w artykule była kompleksowa ocena psychospołecznych warunków pracy kierowców autobusów miejskich i dalekobieżnych. Badaniem objęto 500 kierowców autobusów z 52 różnych firm przewozowych. Narzędziem badawczym był Kopenhaski Kwestionariusz Psychospołecznych Warunków Pracy - COPSOQ II. Analizę przeprowadzono za pomocą testu t-studenta, w którym porównywano średnie wyników kierowców miejskich i dalekobieżnych. Przeprowadzone badanie wykazało, że kierowcy tych pojazdów nie stanowią jednorodnej grupy zawodowej pod kątem występujących zagrożeń psychospołecznych w środowisku pracy. Kierowcy autobusów miejskich mają wyższy poziom wymagań emocjonalnych i tempa pracy, różnią się także od kierowców autobusów dalekobieżnych pod względem warunków organizacji pracy oraz poziomami stresu i dobrostanu.
The aim of the study was to comprehensively assess the psychosocial working conditions of city and long-distance bus drivers. Data were collected among 500 bus drivers from 52 different companies. The variables was measured with the Copenhagen Psychosocial Working Conditions Questionnaire - COPSOQ II. The analysis was carried out using the t-test, which compared the mean results of urban and long-distance drivers. The study showed that city and long-distance bus drivers do not constitute a homogeneous professional group in terms of psychosocial risks in the work environment. City bus drivers have a higher level of emotional demands and work pace, and they also differ from long-distance bus drivers in terms of work organization conditions, stress and well-being.
Źródło:
Bezpieczeństwo Pracy : nauka i praktyka; 2022, 4; 18-22
0137-7043
Pojawia się w:
Bezpieczeństwo Pracy : nauka i praktyka
Dostawca treści:
Biblioteka Nauki
Artykuł
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