Search results for "Stress."
showing 10 items of 5934 documents
Subjective stress, objective heart rate variability-based stress, and recovery on workdays among overweight and psychologically distressed individual…
2015
Background: The present study aimed to investigate how subjective self-reported stress is associated with objective heart rate variability (HRV)-based stress and recovery on workdays. Another aim was to investigate how physical activity (PA), body composition, and age are associated with subjective stress, objective stress, and recovery. Methods: Working-age participants (n = 221; 185 women, 36 men) in this cross-sectional study were overweight (body mass index, 25.3-40.1 kg/m(2)) and psychologically distressed (>= 3/12 points on the General Health Questionnaire). Objective stress and recovery were based on HRV recordings over 1-3 workdays. Subjective stress was assessed by the Perceived St…
Heat shock protein 70 and exercise: morphofunctional relationships
2008
Plēsēju smaržas un mehāniskā kairinājuma izraisītā stresa kāpura stadijā ietekme uz Drosophila melanogaster pieaugušo īpatņu ķermeņa oglekļa un slāpe…
2020
Vispārīgā stresa paradigma paredz, ka plēsonības izraisīts stress ietekmē upuru vielmaiņu, to ķermenim liekot noārdīt enerģētiskās rezerves, kas noved pie pastiprinātas slāpekļa savienojumu izdalīšanas vidē. Darbā novērtēta plēsēja smaržas un mehāniskā kairinājuma ietekme kāpura stadijā uz augļu mušu imago fenotipu. Noskaidrots, ka plēsēja smaržas izraisīts stress samazina mušu ķermeņa masu, palielina slāpekļa koncentrāciju un samazina oglekļa un slāpekļa koncentrāciju attiecību. Līdzīgas fenotipa izmaiņas iepriekš novērotas audzējot kāpurus kopā ar dzīvu zirnekli un liecina, ka kāpuru ožai plēsēja atpazīšanā ir būtiskāka nozīme nekā citām maņām. Rezultāti ir pretrunā vispārīgajai stresa pa…
Ergonomiskie riski ārstu pneimonologu darba vietās un to risināšanas iespējas
2016
“Ergonomiskie riski ārstiem pneimonologiem, to mazināšanas iespējas” Darba autors: Andis Šnēvelis. Darba zinātniskā vadītāja: asoc. prof., Dr.med. Ženija Roja. Darbs izklāstīts uz 75 lpp., ietver 13 attēlus, 19 tabulas, 5 pielikumus, 59 informatīvos avotus. Pētījums sastāv no 4 daļām. Pirmajā ir apkopota, analizēta literatūra par pneimonologu amata specifiku, ergonomiskiem, psihoemocionāliem riskiem. Otrajā daļā apskatītas pētījumā lietotās metodes: 9 ballu, SGR – A, SGR – C metodes, Dž. Adamsa spriedzes anketa, DSI, psiholoģiskā klimata noteikšanas skala. Trešajā daļā ir iegūto datu apkopošana, rezultātu analīze, uz kā pamata izstrādāti ceturtajā daļā izklāstītie veselības veicināšanas pas…
Policijas darba stress un pāru attiecības
2021
Bakalaura darbā tika noskaidrots, vai pastāv statistiski nozīmīgas saistības starp policistu darba stresu un pāru attiecību kvalitāti. Pētījumā piedalījās (N=52) policijas darbinieki vecumā no 25-60 (M=41), (SD=8,90). Tika papildus ievākti demogrāfiskie dati, grupējot pēc dzimuma, izglītības līmeņa un attiecību statusa. Ar vidējo izglītību bija (N=17) 32,7% un ar augstāko izglītību (N=35) 67,3% respondenti. Pētījumā piedalījās vīrieši (N=24) 46,2% un sievietes (N=28) 53,8%. Pēc attiecību statusa – precējušies (N=32) 61,5%, dzīvo kopā ar partneri (N=20) 38,5%. Bakalaura darbā tika izmantotas Uztvertā stresa skala (Perceived Stress Scale, Cohen, Kamarck, & Mermelstein, 1983), Darba Stresa apt…
Effects of Polyacrylic Acid Pre-Treatment on Bonded-Dentine Interfaces Created with a Modern Bioactive Resin-Modified Glass Ionomer Cement and Subjec…
2018
Objectives: Resin-modified glass ionomer cements (RMGIC) are considered excellent restorative materials with unique therapeutic and anti-cariogenic activity. However, concerns exist regarding the use of polyacrylic acid as a dentine conditioner as it may influence the bonding performance of RMGIC. The aim of this study was to evaluate the effect of different protocols for cycling mechanical stress on the bond durability and interfacial ultramorphology of a modern RMGIC applied to dentine pre-treated with/without polyacrylic acid conditioner (PAA). Methods: The RMGIC was applied onto human dentine specimens prepared with silicon-carbide (SiC) abrasive paper with or without the use of a PAA c…
«Sykt lykkelig på sosiale medier» : ungdom og sosiale medier i det postmoderne samfunn : hvordan bruker – og fremstiller dagens ungdom seg på sosiale…
2019
Masteroppgave samfunnskunnskap SV505 - Universitetet i Agder 2019 Denne oppgaven omhandler ungdoms bruk av og fremstilling av seg selv på sosiale medier i lys av samtiden, det postmoderne samfunn. Oppgaven tar for seg hvilke medier ungdom bruker, hvordan og hvorfordebruker sosiale medier, samt hvor mye tid de bruker på sosiale medier. Også hvordan unge presenterer og fremstiller seg selv i ulike sosiale medier blir undersøkt. Med utgangpunkt i den såkalte«Generasjon prestasjon» vies ungdoms opplevelse av press og stress på sosiale medier ekstra oppmerksomhet.Oppgaven baserer seg på en empirisk –kvantitativ spørreundersøkelse av til sammen 148 ungdommer i ungdomsskolen og på videregående sko…
Simple metal under tensile stress: layer-dependent herringbone reconstruction of thin potassium films on graphite
2014
While understanding the properties of materials under stress is fundamentally important, designing experiments to probe the effects of large tensile stress is difficult. Here tensile stress is created in thin films of potassium (up to 4 atomic layers) by epitaxial growth on a rigid support, graphite. We find that this “simple” metal shows a long-range, periodic “herringbone” reconstruction, observed in 2- and 3- (but not 1- and 4-) layer films by low-temperature scanning tunneling microscopy (STM). Such a pattern has never been observed in a simple metal. Density functional theory (DFT) simulations indicate that the reconstruction consists of self-aligned stripes of enhanced atom density fo…
Oxidative Stress in the Pathogenesis of Aorta Diseases as a Source of Potential Biomarkers and Therapeutic Targets, with a Particular Focus on Ascend…
2022
Aorta diseases, such as ascending aorta aneurysm (AsAA), are complex pathologies, currently defined as inflammatory diseases with a strong genetic susceptibility. They are difficult to manage, being insidious and silent pathologies whose diagnosis is based only on imaging data. No diagnostic and prognostic biomarkers or markers of outcome have been known until now. Thus, their identification is imperative. Certainly, a deep understanding of the mechanisms and pathways involved in their pathogenesis might help in such research. Recently, the key role of oxidative stress (OS) on the pathophysiology of aorta disease has emerged. Here, we describe and discuss these aspects by revealing some OS …
Partial Discharges in HVDC Cables - The Effect of the Temperature Gradient During Load Transients
2021
The paper investigates the role of the space charge accumulation phenomena in the inception of Partial Discharges (PD) in a defect within the bulk of the dielectrics of a High Voltage Direct Current (HVDC) cable. It is widespread accepted that the number of PD occurring in an HVDC cable during its lifetime is largely less than that under AC voltage stress. This is essentially due to higher values of the voltage between the conductor and the screen needed to trigger PD under a steady DC voltage than the same value under AC stress. Nevertheless, due to the dependency of the electrical conductivity of the insulation on the electric field and temperature, PD in HVDC cables is strongly influence…