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https://www.readbyqxmd.com/read/28724029/-psychosocial-stress-at-work-and-alcohol-consumption-patterns-in-offshore-oil-workers
#1
Jahina Moura Vidal, Angela Mendes Abreu, Luciana Fernandes Portela
The objectives were to assess the association between psychosocial stress at work and alcohol consumption patterns in offshore oil workers. This was a cross-sectional study of 210 workers on offshore oil rigs in the state of Rio de Janeiro, Brazil, from July to September 2014. The data collection instrument was a self-completed multidimensional questionnaire. Exposure to stress was measured by the demand-control model and alcohol consumption pattern was measured with the Alcohol Use Disorders Identification Test (AUDIT)...
July 13, 2017: Cadernos de Saúde Pública
https://www.readbyqxmd.com/read/28720948/extracts-of-mauritian-carica-papaya-var-solo-protect-sw872-and-hepg2-cells-against-hydrogen-peroxide-induced-oxidative-stress
#2
Jhoti Somanah, Emmanuel Bourdon, Theeshan Bahorun
In line with literature documenting the pluripotent activities of tropical fruits, this study evaluated the antioxidant effects of Carica papaya fruit extracts at cellular level. Investigations using cellular models of oxidative stress provided complementary evidence of the antioxidant activities of papaya fruit. At 2 mg dry weight ml(-1), extracts of seed from ripe and unripe fruit significantly reduced oxidative stress levels within human pre-adipocytes (SW872) and hepatocellular carcinoma cells (HepG2) exposed to hydrogen peroxide (H2O2)...
June 2017: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28720286/stress-generation-during-pecking-motion-of-rotary-nickel-titanium-instruments-with-different-pecking-depth
#3
Jung-Hong Ha, Sang Won Kwak, Asgeir Sigurdsson, Seok Woo Chang, Sung Kyo Kim, Hyeon-Cheol Kim
INTRODUCTION: The aim of this study was to evaluate the effect of different pecking depth on the stress generated by the screw-in forces of a rotating endodontic file in simulated canals. METHODS: Twenty simulated resin blocks with a J-shaped curvature were used. Twenty OneG files (MicroMega, Besançon, France) were assigned for a screw-in test depending on the pecking depth in 2 groups (n = 10). The files were operated at 300 rpm, and the up and down speed was controlled at 1 mm/s stroke velocity and a 10-millisecond dwell time using a customized device...
July 15, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28720190/clinical-herpes-zoster-in-antarctica-as-a-model-for-spaceflight
#4
David P Reyes, Alaina A Brinley, Rebecca S Blue, Stephen K Gruschkus, Andrew T Allen, Scott E Parazynski
INTRODUCTION: Antarctica is a useful analog for spaceflight, as both environments are remote, isolated, and with limited resources. While previous studies have demonstrated increased asymptomatic viral shedding in both the Antarctic and spaceflight environments, clinical manifestations of reactivated viral disease have been less frequently identified. We sought to identify the incidence of clinical herpes zoster from viral reactivation in the Antarctic winter-over population. METHODS: Medical records from the 2014 winter season were reviewed for the incidence of zoster in U...
August 1, 2017: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/28718986/the-effect-of-selection-history-on-extinction-risk-during-severe-environmental-change
#5
Josianne Lachapelle, Nick Colegrave, Graham Bell
Environments rarely remain the same over time, and populations are therefore frequently at risk of going extinct when changes are significant enough to reduce fitness. While many studies have investigated what attributes of the new environments and of the populations experiencing these changes will affect their probability of going extinct, limited work has been directed toward determining the role of population history on the probability of going extinct during severe environmental change. Here we compare the extinction risk of populations with a history of selection in a benign environment, to populations with a history of selection in one or two stressful environments...
July 18, 2017: Journal of Evolutionary Biology
https://www.readbyqxmd.com/read/28718290/enhanced-long-term-and-thermal-stability-of-polymer-solar-cells-in-air-at-high-humidity-with-the-formation-of-unusual-quantum-dot-networks
#6
Long Tan, Fan Yang, Mee Rahn Kim, Pandeng Li, Deepak Thrithamarassery Gangadharan, Joelle Margot, Ricardo Izquierdo, Mohamed Chaker, Dongling Ma
Due to the practical applications of polymer solar cells (PSCs), their stability recently has received increasing attention. Herein, a new strategy was developed to largely enhance the long-term and thermal stability of PSCs in air with a relatively high humidity of 50-60% without any encapsulation. In this strategy, semiconductor PbS/CdS core/shell quantum dots (QDs) were incorporated into the photoactive blend of poly(3-hexylthiophene) (P3HT) and phenyl-C61-butyric acid methyl ester (PCBM). By replacing the initial ligands of oleic acid with halide ligands on the surface of PbS/CdS QDs via solution-phase-ligand-exchange, we were able to form unusual, continuous QD networks in the film of P3HT:PCBM, which effectively stabilized the photoactive layer...
July 18, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28717750/fear-of-treatments-surpasses-demographic-and-socioeconomic-factors-in-affecting-patients-with-breast-cancer-in-urban-south-africa
#7
Sarah Rayne, Kathryn Schnippel, Cynthia Firnhaber, Kathryne Wright, Deirdre Kruger, Carol-Ann Benn
PURPOSE: Breast cancer is the most common cause of cancer in women in South Africa, and often patients present late. There is little understanding of the psychosocial stresses affecting women with breast cancer in Africa. METHODS: A questionnaire was distributed to 263 patients with breast cancer at two sites (one government and one private facility) in Johannesburg. Self-reported levels of fear were recorded on summative scales and their relationship to demographic variables assessed through univariable and multivariable modified Poisson regression...
April 2017: Journal of Global Oncology
https://www.readbyqxmd.com/read/28716704/-psychosocial-working-conditions-of-physician-assistants-results-from-a-qualitative-study-on-occupational-stress-resources-possible-approaches-to-prevention-and-intervention-needs
#8
Patricia Vu-Eickmann, Adrian Loerbroks
BACKGROUND: Numerous studies have documented adverse psychosocial working conditions among health care staff. Working conditions may not only impair the health outcomes of this professional group, but can also affect the quality of care they deliver to patients. Previous work stress research has mainly focused on physicians and nurses. Comparable evidence remains limited, however, for physician assistants (Medizinische Fachangestellte, MFAs), who represent the largest professional group in German primary care...
July 14, 2017: Zeitschrift Für Evidenz, Fortbildung und Qualität Im Gesundheitswesen
https://www.readbyqxmd.com/read/28716466/chronic-low-back-pain-patients-walk-with-locally-altered-spinal-kinematics
#9
Guillaume Christe, François Kade, Brigitte M Jolles, Julien Favre
Various studies have reported alterations of spinal kinematics in patients with chronic low back pain (CLBP) during gait. However, while recent findings stressed the importance of multi-segment analysis, most of prior gait studies modelled the lumbar spine as one segment, when it was not the entire trunk that was considered as a single segment. Therefore, there is a need for comprehensive multi-segment research that could improve our understanding of CLBP pathomechanism and thus possibly contribute to better care for CLBP...
July 5, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28716117/stress-prevention-work-a-study-protocol-for-the-evaluation-of-a-multifaceted-integral-stress-prevention-strategy-to-prevent-employee-stress-in-a-healthcare-organization-a-cluster-controlled-trial
#10
Rianne J A Hoek, Bo M Havermans, Irene L D Houtman, Evelien P M Brouwers, Yvonne F Heerkens, Moniek C Zijlstra-Vlasveld, Johannes R Anema, Allard J van der Beek, Cécile R L Boot
BACKGROUND: Adequate implementation of work-related stress management interventions can reduce or prevent work-related stress and sick leave in organizations. We developed a multifaceted integral stress-prevention strategy for organizations from several sectors that includes a digital platform and collaborative learning network. The digital platform contains a stepwise protocol to implement work-related stress-management interventions. It includes stress screeners, interventions and intervention providers to facilitate access to and the selection of matching work-related stress-management interventions...
July 17, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28716048/transcriptome-analysis-uncovers-arabidopsis-f-box-stress-induced-1-as-a-regulator-of-jasmonic-acid-and-abscisic-acid-stress-gene-expression
#11
Lauren E Gonzalez, Kristen Keller, Karen X Chan, Megan M Gessel, Bryan C Thines
BACKGROUND: The ubiquitin 26S proteasome system (UPS) selectively degrades cellular proteins, which results in physiological changes to eukaryotic cells. F-box proteins are substrate adaptors within the UPS and are responsible for the diversity of potential protein targets. Plant genomes are enriched in F-box genes, but the vast majority of these have unknown roles. This work investigated the Arabidopsis F-box gene F-BOX STRESS INDUCED 1 (FBS1) for its effects on gene expression in order elucidate its previously unknown biological function...
July 17, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28715907/selective-effects-of-psychotherapy-on-frontopolar-cortical-function-in-ptsd
#12
Gregory A Fonzo, Madeleine S Goodkind, Desmond J Oathes, Yevgeniya V Zaiko, Meredith Harvey, Kathy K Peng, M Elizabeth Weiss, Allison L Thompson, Sanno E Zack, Colleen E Mills-Finnerty, Benjamin M Rosenberg, Raleigh Edelstein, Rachael N Wright, Carena A Kole, Steven E Lindley, Bruce A Arnow, Booil Jo, James J Gross, Barbara O Rothbaum, Amit Etkin
OBJECTIVE: Exposure therapy is an effective treatment for posttraumatic stress disorder (PTSD), but a comprehensive, emotion-focused perspective on how psychotherapy affects brain function is lacking. The authors assessed changes in brain function after prolonged exposure therapy across three emotional reactivity and regulation paradigms. METHOD: Individuals with PTSD underwent functional MRI (fMRI) at rest and while completing three tasks assessing emotional reactivity and regulation...
July 18, 2017: American Journal of Psychiatry
https://www.readbyqxmd.com/read/28715596/influence-of-physical-exercise-on-%C3%AE-amyloid-%C3%AE-synuclein-and-tau-accumulation-an-in-vitro-model-of-oxidative-stress-in-human-red-blood-cells
#13
C Iofrida, S Daniele, D Pietrobono, J Fusi, F Galetta, M L Trincavelli, U Bonuccelli, F Franzoni, C Martini
A common pathological feature of neurodegenerative disorders (NDs), such as Alzheimer's (AD) and Parkinson's (PD) diseases, is the abnormal accumulation and misfolding of specific proteins, primarily α-synuclein (α-syn), β-amyloid1-42 (Aβ) and tau, in brain and in peripheral tissues too. Oxidative stress has been proved to be involved in NDs at various levels and, in particular, in such protein alterations, on the contrary physical activity is emerging as a counteracting factor in NDs. In the present work, the content of Aβ, α-syn and tau in red blood cells (RBCs) derived from ten endurance athletes (ATHL) and ten sedentary volunteers (SED) were compared before and after in vitrooxidative stress treatment...
July 1, 2017: Archives Italiennes de Biologie
https://www.readbyqxmd.com/read/28715576/association-of-ozone-exposure-with-cardiorespiratory-pathophysiologic-mechanisms-in-healthy-adults
#14
Drew B Day, Jianbang Xiang, Jinhan Mo, Feng Li, Mingkei Chung, Jicheng Gong, Charles J Weschler, Pamela A Ohman-Strickland, Jan Sundell, Wenguo Weng, Yinping Zhang, Junfeng Jim Zhang
Importance: Exposure to ozone has been associated with cardiovascular mortality, but the underlying biological mechanisms are not yet understood. Objective: To examine the association between ozone exposure and cardiopulmonary pathophysiologic mechanisms. Design, Setting, and Participants: A longitudinal study involving 89 healthy adult participants living on a work campus in Changsha City, China, was conducted from December 1, 2014, to January 31, 2015...
July 17, 2017: JAMA Internal Medicine
https://www.readbyqxmd.com/read/28715409/zika-virus-inhibits-eif2%C3%AE-dependent-stress-granule-assembly
#15
Raquel Amorim, Abdelkrim Temzi, Bryan D Griffin, Andrew J Mouland
Zika virus (ZIKV), a member of the Flaviviridae family, is the most recent emerging arbovirus with pandemic potential. During infection, viruses trigger the host cell stress response, leading to changes in RNA translation and the assembly of large aggregates of stalled translation preinitiation complexes, termed stress granules (SGs). Several reports demonstrate that flaviviruses modulate the assembly of stress granules (SG). As an emerging pathogen, little is known however about how ZIKV modulates the host cell stress response...
July 17, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28715389/extraction-and-purification-of-polyphenols-from-freeze-dried-berry-powder-for-the-treatment-of-vascular-smooth-muscle-cells-in-vitro
#16
Rafaela G Feresin, Shirin Pourafshar, Jingwen Huang, Yitong Zhao, Bahram H Arjmandi, Gloria Salazar
Epidemiological studies indicate that increased flavonoid intake correlates with decreased mortality due to cardiovascular diseases (CVD) in the United States (US) and Europe. Berries are widely consumed in the US and have a high polyphenolic content. Polyphenols have been shown to interact with many molecular targets and to exert numerous positive biological functions, including antioxidant, anti-inflammatory, and cardioprotective effects. Polyphenols isolated from blackberry (BL), raspberry (RB), and black raspberry (BRB) reduce oxidative stress and cellular senescence in response to angiotensin II (Ang II)...
July 5, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28715223/plastic-deformation-through-dislocation-saturation-in-ultra-small-pt-nanocrystals-and-its-in-situ-atomistic-mechanisms
#17
Lihua Wang, Jiao Teng, Xuechao Sha, Jin Zou, Ze Zhang, Xiaodong Han
The atomic-scale deformation dynamic behaviors of Pt nanocrystals with size of ~18 nm were in situ investigated using our homemade device in a high resolution transmission electron microscope. It was discovered that the plastic deformation of the nanosized single crystalline Pt commenced with dislocation "appreciation" first, and then followed by a dislocation "saturation" phenomenon. The magnitude of strain plays a key role on dislocation behaviors. At the early to medium stage of deformation, the plastic deformation was controlled by the full dislocation activities accompanied with the formation of Lomer dislocation locks from reaction of full dislocations...
July 17, 2017: Nano Letters
https://www.readbyqxmd.com/read/28714511/tailoring-crack-morphology-in-coffee-ring-deposits-via-substrate-heating
#18
Hisay Lama, Madivala G Basavaraj, Dillip K Satapathy
The drying of a sessile drop consisting of colloidal particles and the formation of particulate deposits with spatially periodic cracks were ubiquitous. The drying induced stress, which is generated during the evaporation of a colloidal drop, is released by the formation of cracks. We find that the morphology of cracks formed in particulate films dried at substrate temperature, Tsub = 25 °C is markedly different from that of cracks formed at Tsub > 45 °C. The cracks are disordered in the former case, but ordered and periodic in the latter...
July 17, 2017: Soft Matter
https://www.readbyqxmd.com/read/28714151/resilience-as-a-moderator-of-the-indirect-effects-of-conflict-and-workload-on-job-outcomes-among-nurses
#19
Julie Jean Lanz, Valentina Bruk-Lee
AIM: To examine the relative effects of interpersonal conflict and workload on job outcomes (turnover intentions, burnout, injuries) and examine if resilience moderates the indirect effects of conflict and workload on job outcomes via job-related negative affect. BACKGROUND: There is interest in understanding resilience in the nursing profession. Placing resilience in the context of the Emotion-Centered Model of Occupational Stress (Spector, 1998) is a novel approach to understanding how resilience ameliorates the negative effects of workplace stressors...
July 16, 2017: Journal of Advanced Nursing
https://www.readbyqxmd.com/read/28713319/neuropsychological-predictors-of-trauma-centrality-in-oif-oef-veterans
#20
Roland P Hart, Rohini Bagrodia, Nadia Rahman, Richard A Bryant, Roseann Titcombe-Parekh, Charles R Marmar, Adam D Brown
This study examined whether reduced performance on two neuropsychological tasks, cognitive flexibility and working memory, were associated with higher levels of trauma centrality. A growing body of research has shown that trauma centrality, the extent to which a person believes a potentially traumatic event has become central to their self-identity and life story, is associated with post-traumatic stress disorder (PTSD). Furthermore, PTSD is often associated with alterations in neuropsychological functioning...
2017: Frontiers in Psychology
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