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https://www.readbyqxmd.com/read/28541434/rapid-cold-hardening-capacity-and-its-impact-on-performance-of-russian-wheat-aphid-hemiptera-aphididae
#1
Fatemeh Saeidi, Saeid Moharramipour, Azam Mikani
The Russian wheat aphid, Diuraphis noxia (Kurdjumov), is one of the most important pests of wheat and barley in most wheat-producing countries. Rapid cold hardiness (RCH) is a capacity of insects to develop, within hours, protection against subfreezing temperatures that plays an important role in aphid survival in response to sudden decreases in air temperature. In this research, we investigated the duration and rate of cooling on the induction of RCH of D. noxia and the costs of RCH on aphid development and fecundity...
May 25, 2017: Environmental Entomology
https://www.readbyqxmd.com/read/28541063/getting-together-social-contact-frequency-across-the-life-span
#2
Julia Sander, Jürgen Schupp, David Richter
Frequent social interactions are strongly linked to positive affect, longevity, and good health. Although there has been extensive research on changes in the size of social networks over time, little attention has been given to the development of contact frequency across the life span. In this cohort-sequential longitudinal study, we examined intraindividual changes in the frequency of social contact with family and nonfamily members, and potential moderators of these changes. The data come from the 1998, 2003, 2008, and 2013 waves of the German Socio-Economic Panel (SOEP) study (N = 36,716; age range: 17-85 years)...
May 25, 2017: Developmental Psychology
https://www.readbyqxmd.com/read/28539178/gender-marital-status-and-longevity
#3
REVIEW
Gemma Tatangelo, Marita McCabe, Stephen Campbell, Cassandra Szoeke
Most studies report a positive relationship between marital status and health, with findings consistent across cultures and countries. Gender effects are significant, with men demonstrating greater health benefit than women. The vast majority of the research has examined heterosexual marriages, yet there has been rapid evolution in society of cohabitation patterns, who can marry, and roles in marriage. In this review, we summarise research findings and discuss important future challenges. Broader work looking at the impact of social connectedness, loneliness and support on survival should be supported...
June 2017: Maturitas
https://www.readbyqxmd.com/read/28539121/network-mirroring-for-drug-repositioning
#4
Sunghong Park, Dong-Gi Lee, Hyunjung Shin
BACKGROUND: Although drug discoveries can provide meaningful insights and significant enhancements in pharmaceutical field, the longevity and cost that it takes can be extensive where the success rate is low. In order to circumvent the problem, there has been increased interest in 'Drug Repositioning' where one searches for already approved drugs that have high potential of efficacy when applied to other diseases. To increase the success rate for drug repositioning, one considers stepwise screening and experiments based on biological reactions...
May 18, 2017: BMC Medical Informatics and Decision Making
https://www.readbyqxmd.com/read/28534286/development-of-a-novel-resin-based-dental-material-with-dual-biocidal-modes-and-sustained-release-of-ag-ions-based-on-photocurable-core-shell-agbr-cationic-polymer-nanocomposites
#5
Weiwei Cao, Yu Zhang, Xi Wang, Yinyan Chen, Qiang Li, Xiaodong Xing, Yuhong Xiao, Xuefeng Peng, Zhiwen Ye
Research on the incorporation of cutting-edge nano-antibacterial agent for designing dental materials with potent and long-lasting antibacterial property is demanding and provoking work. In this study, a novel resin-based dental material containing photocurable core-shell AgBr/cationic polymer nanocomposite (AgBr/BHPVP) was designed and developed. The shell of polymerizable cationic polymer not only provided non-releasing antibacterial capability for dental resins, but also had the potential to polymerize with other methacrylate monomers and prevented nanoparticles from aggregating in the resin matrix...
July 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/28534002/purposeful-engagement-healthy-aging-and-the-brain
#6
Carol D Ryff, Aaron S Heller, Stacey M Schaefer, Carien van Reekum, Richard J Davidson
PURPOSE OF REVIEW: Research on psychological well-being in later life has identified strengths and vulnerabilities that occur with aging. We review the conceptual and philosophical foundations of a eudaimonic model of well-being and its empirical translation into six key dimensions of positive functioning. We also consider its implications for health, broadly defined. RECENT FINDINGS: Numerous findings from national longitudinal samples of U.S. adults are described...
December 2016: Current Behavioral Neuroscience Reports
https://www.readbyqxmd.com/read/28521912/stressing-out-in-medieval-denmark-an-investigation-of-dental-enamel-defects-and-age-at-death-in-two-medieval-danish-cemeteries
#7
Julia A Gamble, Jesper L Boldsen, Robert D Hoppa
The influence of early life stress on later life experiences has become a major focus of research in medicine and more recently in bioarchaeology. Dental enamel, which preserves a record of childhood stress events, represents an important resource for this investigation when paired with the information from adult skeletal remains, such as age at death. The purpose of this research was to use a life history approach to the exploration of sex differences in the relationship between childhood stress and adult longevity by examining accentuated striae of Retzius (AS)...
June 2017: International Journal of Paleopathology
https://www.readbyqxmd.com/read/28520879/phylogenetic-relationship-and-ftir-spectroscopy-derived-lipid-determinants-of-lifespan-parameters-in-the-saccharomyces-cerevisiae-yeast
#8
Mateusz Molon, Jacek Zebrowski
Yeast aging has been gaining much attention in gerontology research, yet the process itself is still not entirely clear. One of the constraints related to the use of the Saccharomyces cerevisiae yeast in studies is the ambiguity of the results concerning aging determinants for different genetic backgrounds. In this paper, we compare reproductive potentials and lifespans of seven widely used haploid laboratory strains differing in daughter cells production capabilities and highlight the importance of choosing an appropriate genotype for the studies on aging...
May 17, 2017: FEMS Yeast Research
https://www.readbyqxmd.com/read/28514876/potential-support-ratios-cohort-versus-period-perspectives
#9
Søren Kjærgaard, Vladimir Canudas-Romo
The 'prospective potential support ratio' has been proposed by researchers as a measure that accurately quantifies the burden of ageing, by identifying the fraction of a population that has passed a certain measure of longevity, for example, 17 years of life expectancy. Nevertheless, the prospective potential support ratio usually focuses on the current mortality schedule, or period life expectancy. Instead, in this paper we look at the actual mortality experienced by cohorts in a population, using cohort life tables...
May 18, 2017: Population Studies
https://www.readbyqxmd.com/read/28513843/meeting-the-need-for-training-in-geriatrics-the-geriatrics-education-for-specialty-residents-program
#10
Myron Miller, Ronnie A Rosenthal
The imperative created by increasing numbers of aging Americans coupled with increasing longevity has generated recognition and acceptance within american medicine that education, from medical school through postgraduate training through continuing medical education, must include appropriate knowledge and skills in aging and geriatrics to provide for effective care of older adults. Such education and training is necessary not only for traditional primary care providers, but also for specialty physicians, including those in most surgical specialties and in related fields such as anesthesiology, emergency medicine and physical medicine and rehabilitation...
May 17, 2017: Journal of the American Geriatrics Society
https://www.readbyqxmd.com/read/28506252/the-impact-of-residential-status-on-cognitive-decline-among-older-adults-in-china-results-from-a-longitudinal-study
#11
Hanzhang Xu, Matthew E Dupre, Danan Gu, Bei Wu
BACKGROUND: Residential status has been linked to numerous determinants of health and well-being. However, the influence of residential status on cognitive decline remains unclear. The purpose of this research was to assess the changes of cognitive function among older adults with different residential status (urban residents, rural-to-urban residents, rural residents, and urban-to-rural residents), over a 12-year period. METHODS: We used five waves of data (2002, 2005, 2008/2009, 2011/2012, and 2014) from the Chinese Longitudinal Healthy Longevity Survey with 17,333 older adults age 65 and over who were interviewed up to five times...
May 15, 2017: BMC Geriatrics
https://www.readbyqxmd.com/read/28500880/motor-functioning-differentially-predicts-mortality-in-men-and-women
#12
Marie Ernsth Bravell, Deborah Finkel, Anna Dahl Aslan, Chandra A Reynolds, Jenny Hallgren, Nancy L Pedersen
INTRODUCTION: Research indicates gender differences in functional performance at advanced ages, but little is known about their impact on longevity for men and women. OBJECTIVE: To derive a set of motor function factors from a battery of functional performance measures and examine their associations with mortality, incorporating possible gender interactions. METHOD: Analyses were performed on the longitudinal Swedish Adoption/Twin Study of Aging (SATSA) including twenty-four assessments of motor function up to six times over a 19-year period...
May 2, 2017: Archives of Gerontology and Geriatrics
https://www.readbyqxmd.com/read/28497173/identifying-effective-and-sustainable-measures-for-community-based-environmental-monitoring
#13
Ariana J McKay, Chris J Johnson
Resource development projects typically result in monitoring programs that fail to fully consider the values and participation of surrounding communities. Also, monitoring protocols for single environmental values can be insufficient for addressing the cumulative impacts of resource development. Community-based environmental monitoring (CBEM) has emerged as a way to meaningfully include local citizens in the decision-making process and assessment of the development of natural resources. Our research explored how to develop effective and sustainable CBEM...
May 11, 2017: Environmental Management
https://www.readbyqxmd.com/read/28492829/inequalities-in-life-expectancy-among-us-counties-1980-to-2014-temporal-trends-and-key-drivers
#14
Laura Dwyer-Lindgren, Amelia Bertozzi-Villa, Rebecca W Stubbs, Chloe Morozoff, Johan P Mackenbach, Frank J van Lenthe, Ali H Mokdad, Christopher J L Murray
Importance: Examining life expectancy by county allows for tracking geographic disparities over time and assessing factors related to these disparities. This information is potentially useful for policy makers, clinicians, and researchers seeking to reduce disparities and increase longevity. Objective: To estimate annual life tables by county from 1980 to 2014; describe trends in geographic inequalities in life expectancy and age-specific risk of death; and assess the proportion of variation in life expectancy explained by variation in socioeconomic and race/ethnicity factors, behavioral and metabolic risk factors, and health care factors...
May 8, 2017: JAMA Internal Medicine
https://www.readbyqxmd.com/read/28490744/precision-radiology-predicting-longevity-using-feature-engineering-and-deep-learning-methods-in-a-radiomics-framework
#15
Luke Oakden-Rayner, Gustavo Carneiro, Taryn Bessen, Jacinto C Nascimento, Andrew P Bradley, Lyle J Palmer
Precision medicine approaches rely on obtaining precise knowledge of the true state of health of an individual patient, which results from a combination of their genetic risks and environmental exposures. This approach is currently limited by the lack of effective and efficient non-invasive medical tests to define the full range of phenotypic variation associated with individual health. Such knowledge is critical for improved early intervention, for better treatment decisions, and for ameliorating the steadily worsening epidemic of chronic disease...
May 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28489644/an-open-source-ultrasound-software-for-diagnosis-of-fistula-maturation
#16
Barry Belmont, Dae Woo Park, William F Weitzel, Albert J Shih
Vascular access is essential for hemodialysis patients. The mature native arteriovenous fistula has been the preferred vascular access for hemodialysis, because it has greater longevity than synthetic grafts. However, once surgically created, fistulas often fail to develop (mature) into viable points of vascular access, requiring surgical or radiologic interventions before their use. Because maturation depends on vascular mechanics (e.g., distensibility and wall shear), we developed open-source ultrasound software to investigate these metrics clinically...
May 8, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28487181/environmental-conditions-can-modulate-the-links-among-oxidative-stress-age-and-longevity
#17
Valeria Marasco, Antoine Stier, Winnie Boner, Kate Griffiths, Britt Heidinger, Pat Monaghan
Understanding the links between environmental conditions and longevity remains a major focus in biological research. We examined within-individual changes between early- and mid-adulthood in the circulating levels of four oxidative stress markers linked to ageing, using zebra finches (Taeniopygia guttata): a DNA damage product (8-hydroxy-2'-deoxyguanosine; 8-OHdG), protein carbonyls (PC), non-enzymatic antioxidant capacity (OXY), and superoxide dismutase activity (SOD). We further examined whether such within-individual changes differed among birds living under control (ad lib food) or more challenging environmental conditions (unpredictable food availability), having previously found that the latter increased corticosterone levels when food was absent but improved survival over a three year period...
May 6, 2017: Mechanisms of Ageing and Development
https://www.readbyqxmd.com/read/28486776/ultrasound-guided-cannulation-of-the-hemodialysis-arteriovenous-access
#18
Frank Ward, Rose Faratro, Rory F McQuillan
Successful cannulation of the arteriovenous access for patients with end-stage kidney failure to allow catheter-free hemodialysis is associated with superior patient outcomes. With an increasing rate of arteriovenous access creation, coupled with increasing dialysis patient age, the "difficult-to-cannulate" access is becoming more commonplace. Ultrasound-guided cannulation aims to improve first-time successful cannulations and minimize cannulation-associated complications such as infiltration and hematoma formation, minimizing delays in access use and reducing catheter dependency...
May 9, 2017: Seminars in Dialysis
https://www.readbyqxmd.com/read/28486678/the-paleosymbiosis-hypothesis-host-plants-can-be-colonized-by-root-symbionts-that-have-been-inactive-for-centuries-to-millenia
#19
Jason Pither, Brian J Pickles
Paleoecologists have speculated that post-glacial migration of tree species could have been facilitated by mycorrhizal symbionts surviving glaciation as resistant propagules belowground. The general premise of this idea, which we call the 'paleosymbiosis hypothesis', is that host plants can access and be colonized by fungal root symbionts that have been inactive for millennia. Here, we explore the plausibility of this hypothesis by synthesizing relevant findings from a diverse literature. For example, the paleoecology literature provided evidence of modern roots penetrating paleosols containing ancient (> 6000 yr) fungal propagules, though these were of unknown condition...
May 9, 2017: FEMS Microbiology Ecology
https://www.readbyqxmd.com/read/28481427/individual-versus-pseudo-repeatability-in-behaviour-lessons-from-translocation-experiments-in-a-wild-insect
#20
Petri T Niemelä, Niels J Dingemanse
1.Repeatability represents a key parameter in ecological and evolutionary research. Repeatability is underpinned by developmental plasticity and genetic variation but may become biased upwards by repeatable differences in environments to which individuals respond plastically. The extent of upward bias caused by the latter mechanism (causing "pseudo-repeatability") is important yet rarely investigated in ecological research. 2.We repeatedly assayed a key behaviour (flight initiation distance) affecting longevity in a wild cricket population (Gryllus campestris)...
May 8, 2017: Journal of Animal Ecology
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