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Chris Powers

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https://www.readbyqxmd.com/read/28807991/torque-depression-following-active-shortening-is-associated-with-a-modulation-of-cortical-and-spinal-excitation-a-history-dependent-study
#1
Jordan Grant, Chris J McNeil, Leah R Bent, Geoffrey A Power
The reduction in steady-state isometric torque following a shortening muscle action when compared to a purely isometric contraction at the same muscle length and level of activation is termed torque depression (TD). The purpose of this study was to investigate spinal and supraspinal neural responses during the TD state of a maximal voluntary activation of the ankle dorsiflexors. Thirteen subjects (10 male) were recruited for the study. To explore alterations in corticospinal excitability during voluntary muscle activation in the TD state, motor evoked potentials (MEPs), cervicomedullary motor evoked potentials (CMEPs), and maximal compound muscle action potentials (Mmax) were elicited during the isometric steady-state following active shortening (i...
August 2017: Physiological Reports
https://www.readbyqxmd.com/read/28798989/perceived-postoperative-support-differentiates-responders-from-non-responders-3%C3%A2-years-after-laparoscopic-roux-en-y-gastric-bypass
#2
Ulrike B J M Ter Braak, Chris Hinnen, Marjolein M C de Jong, Arnold van de Laar
BACKGROUND: Bariatric surgery is an effective intervention for the majority of patients with morbid obesity, but a significant minority fails to achieve substantial weight loss. In the search of possible predictors of weight loss following bariatric surgery, preoperative factors turn out to have limited predictive power. This study will examine the impact of two postoperative factors on weight loss: perceived social support and stressful life events. METHODS: From the entire 2013 cohort that underwent laparoscopic Roux-and-Y gastric bypass (LRYGB) in a general hospital in the Netherlands, a group of 56 non-responders and a matched group of 56 responders were selected, using an alterable weight loss (%AWL)-based percentile chart...
August 11, 2017: Obesity Surgery
https://www.readbyqxmd.com/read/28782541/investigating-the-efficacy-of-web-based-transfer-training-on-independent-wheelchair-transfers-through-randomized-control-trials
#3
Lynn Worobey, Stephanie Rigot, Nathan Hogaboom, Chris Venus, Michael L Boninger
OBJECTIVES: To determine the efficacy of a web-based transfer training module at improving transfer technique across three groups: web-based training, in-person training (current standard of practice), and a waitlist control group (WLCG). Secondarily, to determine subject factors that can be used to predict improvements in transfer ability after training. DESIGN: Randomized control trials. SETTING: Summer and winter sporting events for disabled veterans...
August 3, 2017: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/28780387/evaluation-of-the-response-of-intracranial-xenografts-to-vegf-signaling-inhibition-using-multiparametric-mri
#4
Jessica K R Boult, Gary Box, Maria Vinci, Lara Perryman, Suzanne A Eccles, Chris Jones, Simon P Robinson
Vascular endothelial growth factor A (VEGF-A) is considered one of the most important factors in tumor angiogenesis, and consequently, a number of therapeutics have been developed to inhibit VEGF signaling. Therapeutic strategies to target brain malignancies, both primary brain tumors, particularly in pediatric patients, and metastases, are lacking, but targeting angiogenesis may be a promising approach. Multiparametric MRI was used to investigate the response of orthotopic SF188(luc) pediatric glioblastoma xenografts to small molecule pan-VEGFR inhibitor cediranib and the effects of both cediranib and cross-reactive human/mouse anti-VEGF-A antibody B20-4...
August 3, 2017: Neoplasia: An International Journal for Oncology Research
https://www.readbyqxmd.com/read/28778114/comparison-of-hill-rbf-barrett-universal-and-current-third-generation-formulas-for-the-calculation-of-intraocular-lens-power-during-cataract-surgery
#5
Timothy V Roberts, Chris Hodge, Gerard Sutton, Michael Lawless
IMPORTANCE: This study represents a novel comparison of recently introduced intraocular lens (IOL) power calculation formulas. BACKGROUND: To compare current new generation formulas for calculating the IOL power for a standard cohort of patients undergoing cataract and lens replacement surgery in a private group practice in Australia. DESIGN: Retrospective case series comparison. PARTICIPANTS: Postoperative results from 400 consecutive patients undergoing implantation of an SN60WF IOL post cataract removal by 12 surgeons were used...
August 4, 2017: Clinical & Experimental Ophthalmology
https://www.readbyqxmd.com/read/28777381/mixotrophy-drives-niche-expansion-of-verrucomicrobial-methanotrophs
#6
Carlo R Carere, Kiel Hards, Karen M Houghton, Jean F Power, Ben McDonald, Christophe Collet, Daniel J Gapes, Richard Sparling, Eric S Boyd, Gregory M Cook, Chris Greening, Matthew B Stott
Aerobic methanotrophic bacteria have evolved a specialist lifestyle dependent on consumption of methane and other short-chain carbon compounds. However, their apparent substrate specialism runs contrary to the high relative abundance of these microorganisms in dynamic environments, where the availability of methane and oxygen fluctuates. In this work, we provide in situ and ex situ evidence that verrucomicrobial methanotrophs are mixotrophs. Verrucomicrobia-dominated soil communities from an acidic geothermal field in Rotokawa, New Zealand rapidly oxidised methane and hydrogen simultaneously...
August 4, 2017: ISME Journal
https://www.readbyqxmd.com/read/28764717/a-longitudinal-cohort-study-of-malaria-exposure-and-changing-serostatus-in-a-malaria-endemic-area-of-rural-tanzania
#7
Ryan A Simmons, Leonard Mboera, Marie Lynn Miranda, Alison Morris, Gillian Stresman, Elizabeth L Turner, Randall Kramer, Chris Drakeley, Wendy P O'Meara
BACKGROUND: Measurements of anti-malarial antibodies are increasingly used as a proxy of transmission intensity. Most serological surveys are based on the use of cross-sectional data that, when age-stratified, approximates historical patterns of transmission within a population. Comparatively few studies leverage longitudinal data to explicitly relate individual infection events with subsequent antibody responses. METHODS: The occurrence of seroconversion and seroreversion events for two Plasmodium falciparum asexual stage antigens (MSP-1 and AMA-1) was examined using three annual measurements of 691 individuals from a cohort of individuals in a malaria-endemic area of rural east-central Tanzania...
August 2, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28747378/nadph-oxidase-nox5-accelerates-renal-injury-in-diabetic-nephropathy
#8
Jay C Jha, Claudine Banal, Jun Okabe, Stephen P Gray, Thushan Hettige, Bryna S M Chow, Vicki Thallas-Bonke, Lisanne De Vos, Chet E Holterman, Melinda T Coughlan, David A Power, Alison Skene, Elif I Ekinci, Mark E Cooper, Rhian M Touyz, Chris R Kennedy, Karin Jandeleit-Dahm
NADPH-oxidase derived excessive production of reactive oxygen species (ROS) in the kidney plays a key role in mediating renal injury in diabetes. Pathological changes in diabetes include mesangial expansion and accumulation of extracellular matrix (ECM) leading to glomerulosclerosis. There is a paucity of data about the role of the Nox5 isoform of NADPH oxidase in animal models of diabetic nephropathy since Nox5 is absent in the mouse genome. Thus, we examined the role of Nox5 in human diabetic nephropathy, in human mesangial cells and in an inducible human Nox5 transgenic mouse exposed to STZ-induced diabetes...
July 26, 2017: Diabetes
https://www.readbyqxmd.com/read/28739478/an-overview-of-clinical-guidelines-for-the-management-of-vertebral-compression-fracture-a-systematic-review
#9
REVIEW
Patrícia Parreira, Chris G Maher, Rodrigo Z Megale, Lyn March, Manuela L Ferreira
BACKGROUND CONTEXT: Vertebral compression fractures are the most common type of osteoporotic fracture comprising approximately 1.4 million cases worldwide. Clinical practice guidelines can be powerful tools for promoting evidence-based practice, as they integrate research findings in order to support decision-making. However, currently available clinical guidelines and recommendations, established by different medical societies, are sometimes contradictory. PURPOSE: The aim of this study was to appraise the recommendations and methodological quality of international clinical guidelines for the management of VCFs...
July 21, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28738276/the-impact-of-accelerated-high-frequency-rtms-on-brain-neurochemicals-in-treatment-resistant-depression-insights-from-1-h-mr-spectroscopy
#10
Chris Baeken, Jean-Pascal Lefaucheur, Peter Van Schuerbeek
OBJECTIVE: Although accelerated repetitive transcranial magnetic stimulation (rTMS) designs seem to be able to alleviate mood over a relatively short period of time, no studies yet examined the cellular effects on neurochemicals with regard to working mechanisms, safety and neural integrity. METHODS: Eighteen right-handed antidepressant-free unipolar treatment resistant depressed (TRD) patients participated in this sham-controlled accelerated high frequency (aHF)-rTMS (1)H MR spectroscopy study applied to the left dorsolateral prefrontal cortex (DLPFC)...
September 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28736409/putting-the-community-back-into-community-health-needs-assessments-maximizing-partnerships-via-community-based-participatory-research
#11
Chris Michael Kirk, Sharon Johnson-Hakim, Ashley Anglin, Catherine Connelly
THE PROBLEM: The community health needs assessment (CHNA) mandate of the Patient Protection and Affordable Care Act (ACA) has the potential to make significant and sustainable change in the health of communities. However, to date many hospital-led assessments have used traditional, top-down data collection approaches that overemphasize individualized community member deficits and underutilize collaboration across sectors. PURPOSE: The purpose of this paper is to present the principles of community-based participatory research (CBPR) as a framework for conducting CHNAs in a way that mitigates the potential for harm, waste, and misrepresentation of community assets and needs that characterizes many existing CHNA processes, illustrating the power of applying CBPR partnerships to this process...
2017: Progress in Community Health Partnerships: Research, Education, and Action
https://www.readbyqxmd.com/read/28718977/effect-of-simulated-gastrointestinal-digestion-and-fermentation-on-polyphenolic-content-and-bioactivity-of-brown-seaweed-phlorotannin-rich-extracts
#12
Giulia Corona, Maria Magdalena Coman, Yuxuan Guo, Sarah Hotchkiss, Chris Gill, Parveen Yaqoob, Jeremy P E Spencer, Ian Rowland
SCOPE: Unlike other classes of polyphenols, there is a lack of knowledge regarding brown seaweed phlorotannins and their bioactivity. We investigated the impact of in vitro gastrointestinal digestion and colonic fermentation on the bioactivity of a seaweed phlorotannin extract from Ascophyllum nodosum and its high molecular weight (HMW) and low molecular weight (LMW) fractions. METHODS AND RESULTS: The highest phlorotannin and total polyphenol (TP) concentration was observed in the HMW fraction...
July 18, 2017: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/28701505/remotely-sensed-wind-speed-predicts-soaring-behaviour-in-a-wide-ranging-pelagic-seabird
#13
Rory Gibb, Akiko Shoji, Annette L Fayet, Chris M Perrins, Tim Guilford, Robin Freeman
Global wind patterns affect flight strategies in many birds, including pelagic seabirds, many of which use wind-powered soaring to reduce energy costs during at-sea foraging trips and migration. Such long-distance movement patterns are underpinned by local interactions between wind conditions and flight behaviour, but these fine-scale relationships are far less well understood. Here we show that remotely sensed ocean wind speed and direction are highly significant predictors of soaring behaviour in a migratory pelagic seabird, the Manx shearwater (Puffinus puffinus)...
July 2017: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/28689855/planyourlifespan-org-an-intervention-to-help-seniors-make-choices-for-their-fourth-quarter-of-life-results-from-the-randomized-clinical-trial
#14
Lee A Lindquist, Vanessa Ramirez-Zohfeld, Priya D Sunkara, Chris Forcucci, Dianne S Campbell, Phyllis Mitzen, Jody D Ciolino, Dyanna Gregory, Gayle Kricke, Kenzie A Cameron
OBJECTIVE: Few older adults contemplate their home support and health needs that may be required for aging-in-place. We sought to assess the efficacy of PlanYourLifespan.org (PYL), in influencing seniors' planning behaviors, perception of the importance of planning, and confidence accessing services. METHOD: Randomized controlled trial, of adults, age ≥65 years in urban, suburban, rural areas of Texas, Illinois, Indiana. RESULTS: Among 385 participants, mean age was 71...
June 27, 2017: Patient Education and Counseling
https://www.readbyqxmd.com/read/28686555/heat-related-mortality-in-japan-after-the-2011-fukushima-disaster-an-analysis-of-potential-influence-of-reduced-electricity-consumption
#15
Yoonhee Kim, Antonio Gasparrini, Masahiro Hashizume, Yasushi Honda, Chris Fook Sheng Ng, Ben Armstrong
BACKGROUND: In March 2011, the Great East Japan Earthquake devastated several power stations and caused severe electricity shortages. This accident was followed by the implementation of policies to reduce summer electricity consumption in the affected areas, for example, by limiting air-conditioning (AC) use. This provided a natural experimental scenario to investigate if these policies were associated with an increase in heat-related mortality. OBJECTIVES: We examined whether the reduced electricity consumption in warm season modified heat-related mortality from 2008 to 2012...
July 6, 2017: Environmental Health Perspectives
https://www.readbyqxmd.com/read/28671471/solution-processed-carbon-nanotube-true-random-number-generator
#16
William A Gaviria Rojas, Julian J McMorrow, Michael L Geier, Qianying Tang, Chris H Kim, Tobin J Marks, Mark C Hersam
With the growing adoption of interconnected electronic devices in consumer and industrial applications, there is an increasing demand for robust security protocols when transmitting and receiving sensitive data. Toward this end, hardware true random number generators (TRNGs), commonly used to create encryption keys, offer significant advantages over software pseudorandom number generators. However, the vast network of devices and sensors envisioned for the "Internet of Things" will require small, low-cost, and mechanically flexible TRNGs with low computational complexity...
July 7, 2017: Nano Letters
https://www.readbyqxmd.com/read/28658073/monitoring-changes-in-power-speed-agility-and-endurance-in-elite-cricketers-during-the-off-season
#17
Chris Bishop, Ross Herridge, Anthony Turner
The purpose of this study was to monitor changes in power, speed, agility and endurance in elite cricketers during the 20-week off-season period. Fourteen elite male cricketers (age 26.2 ± 5.3years; height 180.8 ± 8.5cm; mass 83.5 ± 6.7kg) conducted a physical testing battery in week 1 and week 18 of the off-season period. The testing included a yoyo intermittent recovery test (yoyo IRT), bilateral and unilateral countermovement jumps (CMJ), squat jump (SJ), broad jump (BJ), drop jump (to calculate reactive strength index - [RSI]), pro agility and 5, 10, 20m sprint tests...
June 22, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28656157/opportunities-lost-and-gained-changes-in-progenitor-competence-during-nervous-system-development
#18
REVIEW
Dylan R Farnsworth, Chris Q Doe
During development of the central nervous system, a small pool of stem cells and progenitors generate the vast neural diversity required for neural circuit formation and behavior. Neural stem and progenitor cells often generate different progeny in response to the same signaling cue (e.g. Notch or Hedgehog), including no response at all. How does stem cell competence to respond to signaling cues change over time? Recently, epigenetics particularly chromatin remodeling - has emerged as a powerful mechanism to control stem cell competence...
2017: Neurogenesis (Austin, Tex.)
https://www.readbyqxmd.com/read/28650739/the-effect-of-high-intensity-exercise-and-anticipation-on-trunk-and-lower-limb-biomechanics-during-a-crossover-cutting-manoeuvre
#19
Enda F Whyte, Chris Richter, Siobhan O'connor, Kieran A Moran
We investigated the effects of high intensity, intermittent exercise (HIIP) and anticipation on trunk, pelvic and lower limb biomechanics during a crossover cutting manoeuvre. Twenty-eight male, varsity athletes performed crossover cutting manoeuvres in anticipated and unanticipated conditions pre- and post-HIIP. Kinematic and kinetic variables were captured using a motion analysis system. Statistical parametric mapping (repeated-measures ANOVA) was used to identify differences in biomechanical patterns. Results demonstrated that both unanticipation and fatigue (HIIP) altered the biomechanics of the crossover cutting manoeuvre, whereas no interactions effects were observed...
June 26, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28644195/considerations-for-selecting-field-based-strength-and-power-fitness-tests-to-measure-asymmetries
#20
Chris Bishop, Anthony Turner, Paul Jarvis, Shyam Chavda, Paul Read
Bishop, C, Turner, A, Jarvis, P, Chavda, S, and Read, P. Considerations for selecting field-based strength and power fitness tests to measure asymmetries. J Strength Cond Res 31(9): 2635-2644, 2017-The prevalence of lower limb asymmetries has been reported in numerous studies; however, methodological differences exist in the way they can be detected. Strength and jumping-based tasks have been most commonly used to examine these differences across both athlete and nonathlete populations. The aim of this review was to critically analyze the utility of strength and jumping tests that are frequently used to measure asymmetry...
September 2017: Journal of Strength and Conditioning Research
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