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https://www.readbyqxmd.com/read/28333234/horizontal-transfer-of-the-blandm-1-gene-to-pseudomonas-aeruginosa-and-acinetobacter-baumannii-in-biofilms
#1
Windy D Tanner, Robyn M Atkinson, Ramesh K Goel, Mark A Toleman, Lowell Scott Benson, Christina A Porucznik, James A VanDerslice
Horizontal gene transfer has contributed to the global spread of the blaNDM-1 gene. Multiple studies have demonstrated plasmid transfer of blaNDM-1 between Gram-negative bacteria, primarily Enterobacteriaceae species, but conjugational transfer of natural blaNDM-1 plasmids from Enterobacteriaceae into Pseudomonas aeruginosa and Acinetobacter baumannii has not previously been shown. As P. aeruginosa and A. baumannii are both typically strong biofilm-formers, transfer of natural blaNDM-1 plasmids could potentially occur more readily in this environment...
February 25, 2017: FEMS Microbiology Letters
https://www.readbyqxmd.com/read/28319713/observational-evidence-on-the-effects-of-mega-fires-on-the-frequency-of-hydrogeomorphic-hazards-the-case-of-the-peloponnese-fires-of-2007-in-greece
#2
M Diakakis, E I Nikolopoulos, S Mavroulis, E Vassilakis, E Korakaki
Even though rare, mega-fires raging during very dry and windy conditions, record catastrophic impacts on infrastructure, the environment and human life, as well as extremely high suppression and rehabilitation costs. Apart from the direct consequences, mega-fires induce long-term effects in the geomorphological and hydrological processes, influencing environmental factors that in turn can affect the occurrence of other natural hazards, such as floods and mass movement phenomena. This work focuses on the forest fire of 2007 in Peloponnese, Greece that to date corresponds to the largest fire in the country's record that burnt 1773km(2), causing 78 fatalities and very significant damages in property and infrastructure...
March 16, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28163878/foraging-in-an-unsteady-world-bumblebee-flight-performance-in-field-realistic-turbulence
#3
J D Crall, J J Chang, R L Oppenheimer, S A Combes
Natural environments are characterized by variable wind that can pose significant challenges for flying animals and robots. However, our understanding of the flow conditions that animals experience outdoors and how these impact flight performance remains limited. Here, we combine laboratory and field experiments to characterize wind conditions encountered by foraging bumblebees in outdoor environments and test the effects of these conditions on flight. We used radio-frequency tags to track foraging activity of uniquely identified bumblebee (Bombus impatiens) workers, while simultaneously recording local wind flows...
February 6, 2017: Interface Focus
https://www.readbyqxmd.com/read/28041723/muddy-conditions-reduce-hygiene-and-lying-time-in-dairy-cattle-and-increase-time-spent-on-concrete
#4
Jennifer M Chen, Carolyn L Stull, David N Ledgerwood, Cassandra B Tucker
Dairy cattle spend less time lying and show signs of increased stress when housed in rainy and windy conditions, but no work has separated the effects of exposure to inclement weather from muddy conditions underfoot. Our objective was to evaluate the effects of muddy conditions alone on lying behavior, hygiene, and physiological responses. We housed pairs of pregnant, nonlactating dairy cattle (n = 12; 6 primigravid heifers, 6 multiparous cows) in enclosed pens with dirt floors and a concrete feed apron. Cattle were exposed to 3 levels of soil moisture: 90 (dry), 74 (muddy), or 67% (very muddy) dry matter for 5 d each in a replicated 3 × 3 Latin square design...
March 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/27988439/biomechanical-characterization-of-spider-webs
#5
Rakesh Das, Amit Kumar, Anurag Patel, Sahil Vijay, Shashank Saurabh, Navin Kumar
In light of recent focus on the behaviour of the natural structures for revolutionary technological growth, spider web seems to have seized considerable attention of product designer due to its amazing behaviour. In present work, mechanism behind the structural integrity of the spider web along with the materialistic analysis of its constituent silk threads has been extensively investigated. The nanoindentation tool both in static and dynamic mode has been utilized for complete analysis of the mechanical behaviour of the spiral and radial threads separately...
December 13, 2016: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/27904582/the-role-of-peroxisome-proliferator-activated-receptor-coactivator-1-gene-in-skin-aging
#6
REVIEW
Shahrzad Aghaei, Mohammad Ali Nilforoushzadeh, Maryam Aghaei
Skin aging is a continuous process that exhibits fine and deep wrinkles, thin and transparent skin, loss of underlying fat, dry skin and itch, following decreased collagen and elastin synthesis. Both extrinsic and intrinsic agents are considered in the pathogenesis on skin aging. Extrinsic factors such as sun exposure, windy and dry weather, nutrition, and lifestyle may induce premature aging, toxic-free radicals, and reactive oxygen species due to decreasing normal function of mitochondria which play the major intrinsic factors in premature skin aging...
2016: Journal of Research in Medical Sciences: the Official Journal of Isfahan University of Medical Sciences
https://www.readbyqxmd.com/read/27893946/predicting-animal-home-range-structure-and-transitions-using-a-multistate-ornstein-uhlenbeck-biased-random-walk
#7
Greg A Breed, Emily A Golson, M Tim Tinker
The home-range concept is central in animal ecology and behavior, and numerous mechanistic models have been developed to understand home range formation and maintenance. These mechanistic models usually assume a single, contiguous home range. Here we describe and implement a simple home-range model that can accommodate multiple home-range centers, form complex shapes, allow discontinuities in use patterns, and infer how external and internal variables affect movement and use patterns. The model assumes individuals associate with two or more home-range centers and move among them with some estimable probability...
October 6, 2016: Ecology
https://www.readbyqxmd.com/read/27875525/precision-medicine-in-cancer-challenges-and-recommendations-from-an-eu-funded-cervical-cancer-biobanking-study
#8
Sanne Samuels, Balazs Balint, Heiko von der Leyen, Philippe Hupé, Leanne de Koning, Choumouss Kamoun, Windy Luscap-Rondof, Ulrike Wittkop, Ksenia Bagrintseva, Marina Popovic, Atttila Kereszt, Els Berns, Gemma G Kenter, Ekaterina S Jordanova, Maud Kamal, Susy Scholl
BACKGROUND: Cervical cancer (CC) remains a leading cause of gynaecological cancer-related mortality worldwide. CC pathogenesis is triggered when human papillomavirus (HPV) inserts into the genome, resulting in tumour suppressor gene inactivation and oncogene activation. Collecting tumour and blood samples is critical for identifying these genetic alterations. METHODS: BIO-RAIDs is the first prospective molecular profiling clinical study to include a substantial biobanking effort that used uniform high-quality standards and control of samples...
December 6, 2016: British Journal of Cancer
https://www.readbyqxmd.com/read/27864497/the-impact-of-infertility-on-women-s-mental-health
#9
Windy Ezzell
No abstract text is available yet for this article.
November 2016: North Carolina Medical Journal
https://www.readbyqxmd.com/read/27788935/caregivers-perceptions-of-illness-severity-and-end-of-life-service-utilization-in-advanced-heart-failure
#10
Windy Alonso, Judith E Hupcey, Lisa Kitko
OBJECTIVES: To assess perceptions of illness severity and terminality in caregivers of advanced heart failure (HF) patients and how these perceptions influence utilization of palliative care and end-of life services. BACKGROUND: HF is a terminal disease; yet patients and caregivers do not understand the severity of HF or acknowledge disease terminality. METHODS: This study was conducted using a qualitative design with in-depth interviews and content analysis...
January 2017: Heart & Lung: the Journal of Critical Care
https://www.readbyqxmd.com/read/27788339/collective-response-of-leaf-cutting-ants-to-the-effects-of-wind-on-foraging-activity
#11
Andrea Marina Alma, Alejandro G Farji-Brener, Luciana Elizalde
One advantage of sociality is to mitigate environmental restrictions through collective behavior. Here we document a colony-level response of leaf-cutting ants to wind, an environmental factor that impedes foraging. Given that larger ants adhere more strongly to the substrate, increasing forager size in windy conditions should reduce the negative effect of wind. We tested this idea for Acromyrmex lobicornis in windy regions of Patagonia. We examined (1) whether the fraction of larger ants versus smaller ants increased in windy conditions and (2) whether the effect of wind on the ants' movement was lower for larger ants...
November 2016: American Naturalist
https://www.readbyqxmd.com/read/27701794/gabaergic-hyperinnervation-of-dentate-granule-cells-in-the-ts65dn-mouse-model-of-down-syndrome-exploring-the-role-of-app
#12
Fatemeh S Mojabi, Atoossa Fahimi, Shahrzad Moghadam, Sarah Moghadam, M Windy McNerneny, Ravikumar Ponnusamy, Alexander Kleschevnikov, William C Mobley, Ahmad Salehi
It has been suggested that increased GABAergic innervation in the hippocampus plays a significant role in cognitive dysfunction in Down syndrome (DS). Bolstering this notion, are studies linking hyper-innervation of the dentate gyrus (DG) by GABAergic terminals to failure in LTP induction in the Ts65Dn mouse model of DS. Here, we used extensive morphometrical methods to assess the status of GABAergic interneurons in the DG of young and old Ts65Dn mice and their 2N controls. We detected an age-dependent increase in GABAergic innervation of dentate granule cells (DGCs) in Ts65Dn mice...
December 2016: Hippocampus
https://www.readbyqxmd.com/read/27686571/physical-exercise-induces-structural-alterations-in-the-hippocampal-astrocytes-exploring-the-role-of-bdnf-trkb-signaling
#13
Atoossa Fahimi, Mehmet Akif Baktir, Sarah Moghadam, Fatemeh S Mojabi, Krithika Sumanth, M Windy McNerney, Ravikumar Ponnusamy, Ahmad Salehi
While it has been known that physical activity can improve cognitive function and protect against neurodegeneration, the underlying mechanisms for these protective effects are yet to be fully elucidated. There is a large body of evidence indicating that physical exercise improves neurogenesis and maintenance of neurons. Yet, its possible effects on glial cells remain poorly understood. Here, we tested whether physical exercise in mice alters the expression of trophic factor-related genes and the status of astrocytes in the dentate gyrus of the hippocampus...
September 29, 2016: Brain Structure & Function
https://www.readbyqxmd.com/read/27663788/estimates-of-the-risk-of-large-or-long-lasting-outbreaks-of-middle-east-respiratory-syndrome-after-importations-outside-the-arabian-peninsula
#14
Damon J A Toth, Windy D Tanner, Karim Khader, Adi V Gundlapalli
We quantify outbreak risk after importations of Middle East respiratory syndrome outside the Arabian Peninsula. Data from 31 importation events show strong statistical support for lower transmissibility after early transmission generations. Our model projects the risk of ≥10, 100, and 500 transmissions as 11%, 2%, and 0.02%, and ≥1, 2, 3, and 4 generations as 23%, 14%, 0.9%, and 0.05%, respectively. Our results suggest tempered risk of large, long-lasting outbreaks with appropriate control measures.
September 2016: Epidemics
https://www.readbyqxmd.com/read/27662594/morphological-response-of-eight-quercus-species-to-simulated-wind-load
#15
Tonggui Wu, Peng Zhang, Lei Zhang, Geoff G Wang, Mukui Yu
Leaf shape, including leaf size, leaf dissection index (LDI), and venation distribution, strongly impacts leaf physiology and the forces of momentum exerted on leaves or the canopy under windy conditions. Yet, little has been known about how leaf shape affects the morphological response of trees to wind load. We studied eight Quercus species, with different leaf shapes, to determine the morphological response to simulated wind load. Quercus trees with long elliptical leaves, were significantly affected by wind load (P< 0...
2016: PloS One
https://www.readbyqxmd.com/read/27634102/temporal-variations-of-black-carbon-during-haze-and-non-haze-days-in-beijing
#16
Qingyang Liu, Tangming Ma, Michael R Olson, Yanju Liu, Tingting Zhang, Yu Wu, James J Schauer
Black carbon (BC) aerosol has been identified as one of key factors responsible for air quality in Beijing. BC emissions abatement could help slow regional climate change while providing benefits for public health. In order to quantify its variations and contribution to air pollution, we systematically studied real-time measurements of equivalent black carbon (eBC) in PM2.5 aerosols at an urban site in Beijing from 2010 to 2014. Equivalent black carbon (eBC) is used instead of black carbon (BC) for data derived from Aethalometer-31 measurement...
2016: Scientific Reports
https://www.readbyqxmd.com/read/27606562/factors-implicated-in-safety-related-firefighter-fatalities
#17
Steven A Kahn, Tina L Palmieri, Soman Sen, Jason Woods, Oliver L Gunter
Firefighting is wrought with risk, as 80-100 firefighters (FFs) die on the job each year in the United States. Many of the fatalities have been analyzed by the National Institute for Occupational Safety and Health (NIOSH) to determine contributing factors. The purpose of this study is to determine variables that put FFs at risk for potentially preventable workplace mortality such as use of personal protective equipment (PPE), seat belts, and appropriate training/fitness/clearance for duty. The NIOSH FF Fatality Database reports from 2009 to 2014 were analyzed...
January 2017: Journal of Burn Care & Research: Official Publication of the American Burn Association
https://www.readbyqxmd.com/read/27593954/autonomous-homing-control-of-a-powered-parafoil-with-insufficient-altitude
#18
Jin Tao, Qing-Lin Sun, Pan-Long Tan, Zeng-Qiang Chen, Ying-Ping He
In order to realize safe and accurate homing of a powered parafoil under the condition of insufficient initial altitude, a multiphase homing path is designed according to the flight characteristics of the vehicle. With consideration that the traditional control methods cannot ensure the quality of path following because of the nonlinear, large inertial and longtime delay existed in the system and strong disturbances in a complex environment, a homing controller, composed of the vertical and horizontal trajectory tracking controllers, is designed based on active disturbance rejection control (ADRC)...
September 1, 2016: ISA Transactions
https://www.readbyqxmd.com/read/27575467/the-impact-of-human-and-vector-distributions-on-the-spatial-prevalence-of-malaria-in-sub-saharan-africa
#19
Shawn A Means, Robert J Smith
Eradication of malaria from the world in the latter part of the twentieth century proved an elusive, albeit desirable, objective. Unfortunately, resurgence of malarial incidence is currently underway. Key to understanding effective control schemes such as indoor residual spraying (spraying insecticide inside houses to kill the malarial vector mosquitoes) is the impact of spatial distributions for communities exposed to the malarial vector mosquito populations. Densities of human dwellings in small communities vary considerably in regions exposed to larval breeding sites...
November 21, 2016: Journal of Theoretical Biology
https://www.readbyqxmd.com/read/27566445/editor-s-highlight-comparative-toxicity-of-organophosphate-flame-retardants-and-polybrominated-diphenyl-ethers-to-caenorhabditis-elegans
#20
Mamta Behl, Julie R Rice, Marjo V Smith, Caroll A Co, Matthew F Bridge, Jui-Hua Hsieh, Jonathan H Freedman, Windy A Boyd
With the phasing-out of the polybrominated diphenyl ether (PBDE) flame retardants due to concerns regarding their potential developmental toxicity, the use of replacement compounds such as organophosphate flame retardants (OPFRs) has increased. Limited toxicity data are currently available to estimate the potential adverse health effects of the OPFRs. The toxicological effects of 4 brominated flame retardants, including 3 PBDEs and 3,3',5,5'-tetrabromobisphenol A, were compared with 6 aromatic OPFRs and 2 aliphatic OPFRs...
December 2016: Toxicological Sciences: An Official Journal of the Society of Toxicology
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