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https://www.readbyqxmd.com/read/28803875/a-novel-plasma-membrane-anchored-protein-regulates-xylem-cell-wall-deposition-through-microtubule-dependent-lateral-inhibition-of-rho-gtpase-domains
#1
Yuki Sugiyama, Mayumi Wakazaki, Kiminori Toyooka, Hiroo Fukuda, Yoshihisa Oda
Spatial control of cell-wall deposition is essential for determining plant cell shape [1]. Rho-type GTPases, together with the cortical cytoskeleton, play central roles in regulating cell-wall patterning [2]. In metaxylem vessel cells, which are the major components of xylem tissues, active ROP11 Rho GTPases form oval plasma membrane domains that locally disrupt cortical microtubules, thereby directing the formation of oval pits in secondary cell walls [3-5]. However, the regulatory mechanism that determines the planar shape of active Rho of Plants (ROP) domains is still unknown...
August 7, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28800690/community-airborne-particulate-matter-from-mining-for-sand-used-as-hydraulic-fracturing-proppant
#2
Thomas M Peters, Patrick T O'Shaughnessy, Ryan Grant, Ralph Altmaier, Elizabeth Swanton, Jeffrey Falk, David Osterberg, Edith Parker, Nancy G Wyland, Sinan Sousan, Aimee Liz Stark, Peter S Thorne
Field and laboratory studies were conducted to evaluate the impact of proppant sand mining and processing activities on community particulate matter (PM) concentrations. In field studies outside 17 homes within 800m of sand mining activities (mining, processing, and transport), respirable (PM4) crystalline silica concentrations were low (<0.4μg/m(3)) with crystalline silica detected on 7 samples (2% to 4% of mass). In long-term monitoring at 6 homes within 800m of sand mining activities, the highest daily mean PM concentrations observed were 14...
August 7, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28792983/fear-no-colors-observer-clothing-color-influences-lizard-escape-behavior
#3
Breanna J Putman, Jonathan P Drury, Daniel T Blumstein, Gregory B Pauly
Animals often view humans as predators, leading to alterations in their behavior. Even nuanced aspects of human activity like clothing color affect animal behavior, but we lack an understanding of when and where such effects will occur. The species confidence hypothesis posits that birds are attracted to colors found on their bodies and repelled by non-body colors. Here, we extend this hypothesis taxonomically and conceptually to test whether this pattern is applicable in a non-avian reptile and to suggest that species should respond less fearfully to their sexually-selected signaling color...
2017: PloS One
https://www.readbyqxmd.com/read/28789692/diversity-of-use-and-local-knowledge-of-wild-and-cultivated-plants-in-the-eastern-cape-province-south-africa
#4
Alfred Maroyi
BACKGROUND: Traditional ecological knowledge among indigenous communities plays an important role in retaining cultural identity and achieving sustainable natural resource management. Hundreds of millions of people mostly in developing countries derive a substantial part of their subsistence and income from plant resources. The aim of this study was to assess useful plant species diversity, plant use categories and local knowledge of both wild and cultivated useful species in the Eastern Cape province, South Africa...
August 8, 2017: Journal of Ethnobiology and Ethnomedicine
https://www.readbyqxmd.com/read/28783038/photon-caliper-to-achieve-submillimeter-positioning-accuracy
#5
Kyle Joseph Gallagher, Jennifer Wong, Junan Zhang
The purpose of this study was to demonstrate the feasibility of using a commercial two-dimensional (2D) detector array with an inherent detector spacing of 5 mm to achieve submillimeter accuracy in localizing the radiation isocenter. This was accomplished by delivering the Vernier "dose" caliper to a 2D detector array where the nominal scale was the 2D detector array and the non-nominal Vernier scale was the radiation dose strips produced by the high-definition (HD) multileaf collimators (MLCs) of the linear accelerator...
August 7, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28778002/the-efficacy-of-combined-educational-and-site-management-actions-in-reducing-off-trail-hiking-in-an-urban-proximate-protected-area
#6
Karen S Hockett, Jeffrey L Marion, Yu-Fai Leung
Park and protected area managers are tasked with protecting natural environments, a particularly daunting challenge in heavily visited urban-proximate areas where flora and fauna are already stressed by external threats. In this study, an adaptive management approach was taken to reduce extensive off-trail hiking along a popular trail through an ecologically diverse and significant area in the Chesapeake and Ohio National Historical Park near Washington DC. Substantial amounts of off-trail hiking there had created an extensive 16...
August 1, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28755595/predicting-diffuse-microbial-pollution-risk-across-catchments-the-performance-of-scimap-and-recommendations-for-future-development
#7
Kenneth D H Porter, Sim M Reaney, Richard S Quilliam, Chris Burgess, David M Oliver
Microbial pollution of surface waters in agricultural catchments can be a consequence of poor farm management practices, such as excessive stocking of livestock on vulnerable land or inappropriate handling of manures and slurries. Catchment interventions such as fencing of watercourses, streamside buffer strips and constructed wetlands have the potential to reduce faecal pollution of watercourses. However these interventions are expensive and occupy valuable productive land. There is, therefore, a requirement for tools to assist in the spatial targeting of such interventions to areas where they will have the biggest impact on water quality improvements whist occupying the minimal amount of productive land...
July 26, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28752854/ctcf-fences-make-good-neighbours
#8
Ivan Krivega, Ann Dean
CCCTC-binding factor (CTCF) sites are enriched at the boundaries of topologically associated domains (TADs), but their function within TADs is unclear. Removal of sub-TAD CTCF sites adjacent to the α-globin enhancers is now shown to result in inappropriate activation of neighbouring genes. Intra-TAD enhancer insulation might be broadly important for tissue specificity of enhancers.
July 28, 2017: Nature Cell Biology
https://www.readbyqxmd.com/read/28740752/long-term-resource-addition-to-a-detrital-food-web-yields-a-pattern-of-responses-more-complex-than-pervasive-bottom-up-control
#9
Kendra L Lawrence, David H Wise
BACKGROUND: Theory predicts strong bottom-up control in detritus-based food webs, yet field experiments with detritus-based terrestrial systems have uncovered contradictory evidence regarding the strength and pervasiveness of bottom-up control processes. Two factors likely leading to contradictory results are experiment duration, which influences exposure to temporal variation in abiotic factors such as rainfall and affects the likelihood of detecting approach to a new equilibrium; and openness of the experimental units to immigration and emigration...
2017: PeerJ
https://www.readbyqxmd.com/read/28738669/evaluation-of-the-effectiveness-of-a-transfer-interhemispheric-training-programme-in-the-early-stages-of-fencing-training
#10
Mateusz Witkowski, Michał Bronikowski, Agnieszka Nowik, Maciej Tomczak, Jan Strugarek
BACKGROUND: A high level of motor coordination (with an emphasis on the accuracy of hand movements) is an important part of fencers' training. Research on motor coordination shows that both hemispheres of the brain are involved in controlling the action of each of the upper limbs. As the physical training of one hand is believed to significantly increase the performance of the other (untrained) hand [14], the authors attempt to verify the hypothesis that specialized training of the nondominant limb can improve the performance of the dominant hand in fencing...
July 24, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28737614/in-response-to-determinants-of-olympic-fencing-performance-and-implications-for-strength-and-conditioning-training-erratum
#11
(no author information available yet)
No abstract text is available yet for this article.
August 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28732294/soil-bacterial-community-response-to-vegetation-succession-after-fencing-in-the-grassland-of-china
#12
Quanchao Zeng, Shaoshan An, Yang Liu
Natural succession is an important process in terrestrial system, playing an important role in enhancing soil quality and plant diversity. Soil bacteria is the linkage between soil and plant, has an important role in aboveground community dynamics and ecosystem functioning in terrestrial ecosystems, driving the decomposition of soil organic matter and plant litter. However, the role of soil bacteria in the secondary succession has not been well understood, particularly in the degraded soil of Loess Plateau...
July 18, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28690919/plasma-membrane-is-compartmentalized-by-a-self-similar-cortical-actin-meshwork
#13
Sanaz Sadegh, Jenny L Higgins, Patrick C Mannion, Michael M Tamkun, Diego Krapf
A broad range of membrane proteins display anomalous diffusion on the cell surface. Different methods provide evidence for obstructed subdiffusion and diffusion on a fractal space, but the underlying structure inducing anomalous diffusion has never been visualized because of experimental challenges. We addressed this problem by imaging the cortical actin at high resolution while simultaneously tracking individual membrane proteins in live mammalian cells. Our data confirm that actin introduces barriers leading to compartmentalization of the plasma membrane and that membrane proteins are transiently confined within actin fences...
January 2017: Physical Review. X
https://www.readbyqxmd.com/read/28687532/studying-scale-up-and-spread-as-social-practice-theoretical-introduction-and-empirical-case-study
#14
James Shaw, Sara Shaw, Joseph Wherton, Gemma Hughes, Trisha Greenhalgh
BACKGROUND: Health and care technologies often succeed on a small scale but fail to achieve widespread use (scale-up) or become routine practice in other settings (spread). One reason for this is under-theorization of the process of scale-up and spread, for which a potentially fruitful theoretical approach is to consider the adoption and use of technologies as social practices. OBJECTIVE: This study aimed to use an in-depth case study of assisted living to explore the feasibility and usefulness of a social practice approach to explaining the scale-up of an assisted-living technology across a local system of health and social care...
July 7, 2017: Journal of Medical Internet Research
https://www.readbyqxmd.com/read/28677886/dogs-on-livestock-farms-a-cross-sectional-study-investigating-potential-roles-in-zoonotic-pathogen-transmission
#15
N E Moran, A K Ferketich, T E Wittum, J W Stull
Dogs are often present on livestock farms, where they serve important management and companion roles, yet may be involved in zoonotic pathogen transmission. Numerous factors can potentially alter the risk of exposure to zoonotic pathogens, such as the dog's access to livestock, close dog-human contact and an increasing immunocompromised human population. The objective of this study was to quantify and qualify dog ownership among livestock owners, their dog husbandry and biosecurity practices, the dogs' access to livestock and potential risks for zoonotic pathogen transmission...
July 5, 2017: Zoonoses and Public Health
https://www.readbyqxmd.com/read/28674607/fluoroacetate-in-plants-a-review-of-its-distribution-toxicity-to-livestock-and-microbial-detoxification
#16
REVIEW
Lex Ee Xiang Leong, Shahjalal Khan, Carl K Davis, Stuart E Denman, Chris S McSweeney
Fluoroacetate producing plants grow worldwide and it is believed they produce this toxic compound as a defence mechanism against grazing by herbivores. Ingestion by livestock often results in fatal poisonings, which causes significant economic problems to commercial farmers in many countries such as Australia, Brazil and South Africa. Several approaches have been adopted to protect livestock from the toxicity with limited success including fencing, toxic plant eradication and agents that bind the toxin. Genetically modified bacteria capable of degrading fluoroacetate have been able to protect ruminants from fluoroacetate toxicity under experimental conditions but concerns over the release of these microbes into the environment have prevented the application of this technology...
2017: Journal of Animal Science and Biotechnology
https://www.readbyqxmd.com/read/28665528/trauma-hazards-in-children-an-update-for-the-busy-clinician
#17
REVIEW
Andrew Ja Holland, Soundappan Sv Soundappan
Trauma and injury continue to be common in children and remain an important cause of mortality and morbidity. Legislation mandating the use of helmets for all cyclists appears to have been effective in reducing the incidence and severity of head and facial injuries, with no clear evidence of a reduction in cycling usage or activity. Straddle injuries, whilst uncommon and generally minor, require careful clinical assessment as they may be associated with urethral trauma. Quad bikes remain highly dangerous with continuing reports of deaths in child riders due to their inherent lack of stability: a ban on their use by children would seem the most effective solution...
June 30, 2017: Journal of Paediatrics and Child Health
https://www.readbyqxmd.com/read/28636623/the-basolateral-vesicle-sorting-machinery-and-basolateral-proteins-are-recruited-to-the-site-of-enteropathogenic-e-coli-microcolony-growth-at-the-apical-membrane
#18
Gitte A Pedersen, Helene H Jensen, Anne-Sofie B Schelde, Charlotte Toft, Hans N Pedersen, Maj Ulrichsen, Frédéric H Login, Manuel R Amieva, Lene N Nejsum
Foodborne Enteropathogenic Escherichia coli (EPEC) infections of the small intestine cause diarrhea especially in children and are a major cause of childhood death in developing countries. EPEC infects the apical membrane of the epithelium of the small intestine by attaching, effacing the microvilli under the bacteria and then forming microcolonies on the cell surface. We first asked the question where on epithelial cells EPEC attaches and grows. Using models of polarized epithelial monolayers, we evaluated the sites of initial EPEC attachment to the apical membrane and found that EPEC preferentially attached over the cell-cell junctions and formed microcolonies preferentially where three cells come together at tricellular tight junctions...
2017: PloS One
https://www.readbyqxmd.com/read/28633110/emerging-contaminants-related-to-the-occurrence-of-forest-fires-in-the-spanish-mediterranean
#19
Julian Campo, María Lorenzo, Erik L H Cammeraat, Yolanda Picó, Vicente Andreu
Forest fires can be a source of contamination because, among others, of the use of chemicals to their extinction (flame retardants, FRs), or by the production of Polycyclic Aromatic Hydrocarbons (PAHs) derived from high temperature alteration of organic matter. Up to our knowledge, this study is the first to assess the direct (PAHs 16 on the USA EPA's priority list), and indirect [tri- to hepta- brominated diphenyl ethers (PBDEs), organophosphorus flame retardants (PFRs) and perfluoroalkyl substances (PFASs)] contamination related to forest fires...
June 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28629881/cell-mediated-immune-response-of-postmetamorphic-sea-urchin-juveniles-against-infectious-stages-of-diatom-cylindrotheca-closterium-bacillariophyceae
#20
Adriano Magesky, Claude Belzile, Émilien Pelletier
In this study, successive infectious stages by diatom Cylindrotheca closterium (Bacillariophyceae) are described for the first time during the early development of sea urchin at low temperature (8°C). Diatom cell-types enclosed or not by typical theca were capable of infection. As an immune response, red spherulocytes and amoebocytes migrated towards infested areas and restrained the infection spreading over shells in 2- and 3-month old urchins. Only amoebocyte cells appeared to be involved in the immune reaction of 1-month old specimens which turned out to be a less effective fence to stop infestation...
September 2017: Journal of Invertebrate Pathology
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