Search results for " STRESS"
showing 10 items of 3936 documents
Patient-specific computational evaluation of stiffness distribution in ascending thoracic aortic aneurysm
2021
Quantifying local aortic stiffness properties in vivo is acknowledged as essential to assess the severity of an ascending thoracic aortic aneurysm (ATAA). Recently, the LESI (local extensional stiffness identification) methodology has been established to quantify non-invasively local stiffness properties of ATAAs using electrocardiographic-gated computed tomography (ECG-gated CT) scans. The aim of the current study was to determine the most sensitive markers of local ATAA stiffness estimation with the hypothesis that direct measures of local ATAA stiffness could better detect the high-risk patients. A cohort of 30 patients (12 BAV and 18 TAV) referred for aortic size evaluation by ECG-gated…
Diurnal Cycle Relationships between Passive Fluorescence, PRI and NPQ of Vegetation in a Controlled Stress Experiment
2017
In order to estimate vegetation photosynthesis from remote sensing observations; some critical parameters need to be quantified. From all absorbed light; the plant needs to release any excess that is not used for photosynthesis; by non-photochemical quenching; by fluorescence emission and unregulated thermal dissipation. Non-photochemical quenching (NPQ) processes are controlled photoprotective mechanisms which; once activated; strongly control the dynamics of photochemical efficiency. With illumination conditions increasing and decreasing during a diurnal cycle; photoprotection mechanisms needs to change accordingly. The goal of this work is to quantify dynamic NPQ; measured from active fl…
Apmierinātība ar partnerattiecībām un uztvertais stress saplūdušās un nukleārās ģimenēs.
2021
Bakalaura darba mērķis ir noskaidrot, kādas atšķirības apmierinātībā ar partnerattiecībām un uztverto stresu pastāv starp indivīdiem nukleārās un saplūdušās ģimenēs. Pētījuma izlasi veido 610 indivīdi, no kuriem 430 ir partnerattiecībās nukleārā ģimenē un 180 — saplūdušā ģimenē. Darbā tiek izmantotas divas aptaujas: Apmierinātība ar partnerattiecībām un Uztvertā stresa skala. Pētījuma rezultāti liecina, ka nav statistiski nozīmīgas atšķirības starp salīdzināmajām grupām attiecībā uz apmierinātību ar partnerattiecībām un uztverto stresu. Rezultāti atklāj statistiski nozīmīgas sakarības starp apmierinātību ar partnerattiecībām un uztverto stresu, proti, palielinoties uztvertajam stresam, sama…
Effect of Non-Surgical Periodontal Treatment on Oxidative Stress Markers in Leukocytes and Their Interaction with the Endothelium in Obese Subjects w…
2020
Aim: The primary objective of this pilot study was to evaluate the effect of non-surgical periodontal treatment. The secondary aim was to evaluate the effect of dietary therapy on both parameters of oxidative stress in leukocytes and leukocyte-endothelial cell interactions in an obese population. Methods: This was a pilot study with a before-and-after design. Forty-nine obese subjects with periodontitis were randomized by means of the minimization method and assigned to one of two groups, one of which underwent dietary therapy while the other did not. All the subjects underwent non-surgical periodontal treatment. We determined periodontal, inflammatory and oxidative stress parameters&mdash
The corticotrophin-releasing factor/urocortin system regulates white fat browning in mice through paracrine mechanisms.
2015
Objectives:\ud The corticotrophin-releasing factor (CRF)/urocortin system is expressed in the adipose tissue of mammals, but its functional role in this tissue remains unknown.\ud \ud Methods:\ud Pharmacological manipulation of the activity of CRF receptors, CRF1 and CRF2, was performed in 3T3L1 white pre-adipocytes and T37i brown pre-adipocytes during in vitro differentiation. The expression of genes of the CRF/urocortin system and of markers of white and brown adipocytes was evaluated along with mitochondrial biogenesis and cellular oxygen consumption. Metabolic evaluation of corticosterone-deficient or supplemented Crhr1-null (Crhr1−/−) mice and their wild-type controls was performed alo…
Study of the mechanisms of oxidative stress, mitochondrial function and endoplasmic reticulum stress in obesity. Role in subclinical atherosclerosis …
2019
El aumento alarmante de la prevalencia de obesidad a nivel mundial y la enorme carga de enfermedad asociada ha generado una creciente demanda de estrategias para frenar la epidemia y / o mitigar los efectos dañinos de la obesidad sobre la salud. Para ello se requiere un compromiso firme y sinérgico por parte de todas las fuerzas sociales, no sólo para desarrollar estrategias preventivas, sino también para contribuir al conocimiento de los eventos patológicos y los mecanismos involucrados en el desarrollo de esta enfermedad. Por ello, el objetivo principal de la presente tesis doctoral es profundizar en los mecanismos subyacentes de la obesidad, especialmente en aquellos relacionados con el …
Using the Questionnaire on Experience and Assessment of Work with the Italian Population
2010
The assessment of work-related stress has been an issue that has attracted attention of Italian psychologists for a long time, but only in recent years it has been remarked in the laws protecting workers. In fact, it has just been recalled the need, in a legislative decree, to place special emphasis on psychological well-being of the worker and not just on his security. The Italian professionals (Work, Organizational or Personnel Psychologists) who worked on the assessment of psychological risks of work-related stress, used instruments to assess the organizational climate primarily, by integrating qualitative m ethodologies (such as focus group) with quantitative instruments. These instrume…
Taking the acid test: Mediterranean limpets face up to climate change
2014
Impacts of climate change involve the interactions of multiple stressors on intertidal organisms, but rarely are the impacts of these stressors examined together. Many tests are also conducted in artificial, controlled laboratory conditions, without making use of natural opportunities to test performance of organisms under different environmental stressors. Given its small tidal range, the Mediterranean Sea provides such an opportunity, with a very fine scale environmental gradient and species living very close to each other over the tidal gradient. The vertical distribution of the limpets, Patella rustica and P. caerulea overlap in Palermo, Sicily, but despite this they have different ther…
WRKY gene family drives dormancy release in onion bulbs
2022
Onion (Allium cepa L.) is an important bulb crop grown worldwide. Dormancy in bulbous plants is an important physiological state mainly regulated by a complex gene network that determines a stop of vegetative growth during unfavorable seasons. Limited knowledge on the molecular mechanisms that regulate dormancy in onion were available until now. Here, a comparison between uninfected and onion yellow dwarf virus (OYDV)-infected onion bulbs highlighted an altered dormancy in the virus-infected plants, causing several symptoms, such as leaf striping, growth reduction, early bulb sprouting and rooting, as well as a lower abscisic acid (ABA) level at the start of dormancy. Furthermore, by compar…
Teachers' physiological and self-reported stress, teaching practices and students' learning outcomes in Grade 1.
2022
Background Teachers' self-reported stress is related to the quality of teacher–student interactions and students' learning outcomes. However, it is unclear if teachers' physiological stress is related to child-centred teaching practices in the classroom and whether teaching practices mediate the link between teachers' stress and students' learning outcomes. Aims We studied the effect of teachers' physiological stress and self-reported stress on their teaching practices and thereby on students' learning outcomes in math. Sample A total of 53 classroom teachers and 866 Grade 1 students participated in the study. Methods Salivary cortisol in the middle of the school day and cortisol slope from…