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https://www.readbyqxmd.com/read/28902189/admixture-on-the-northern-front-population-genomics-of-range-expansion-in-the-white-footed-mouse-peromyscus-leucopus-and-secondary-contact-with-the-deer-mouse-peromyscus-maniculatus
#1
A Garcia-Elfring, R D H Barrett, M Combs, T J Davies, J Munshi-South, V Millien
Range expansion has genetic consequences expected to result in differentiated wave-front populations with low genetic variation and potentially introgression from a local species. The northern expansion of Peromyscus leucopus in southern Quebec provides an opportunity to test these predictions using population genomic tools. Our results show evidence of recent and post-glacial expansion. Genome-wide variation in P. leucopus indicates two post-glacial lineages are separated by the St. Lawrence River, with a more recent divergence of populations isolated by the Richelieu River...
September 13, 2017: Heredity
https://www.readbyqxmd.com/read/28893919/antigen-localisation-influences-the-magnitude-and-kinetics-of-the-endogenous-adaptive-immune-response-to-recombinant-salmonella-vaccines
#2
Yanina R Sevastsyanovich, David R Withers, Claire L Marriott, Faye C Morris, Timothy J Wells, Douglas F Browning, Irene Beriotto, Ewan Ross, Hossam Omar Ali, Catherine A Wardius, Adam F Cunningham, Ian R Henderson, Amanda E Rossiter
The use of recombinant attenuated Salmonella vaccine (RASV) strains is a promising strategy to present heterologous antigens to the mammalian immune system to induce both cellular and humoral immune responses. However, studies on RASV development differ in where heterologous antigens are expressed and localised within the bacterium and it is unclear how antigen localisation modulates the immune response. Previously, we exploited the plasmid-encoded toxin (Pet) autotransporter system for accumulation of heterologous antigens in the cell culture supernatant...
September 11, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28873436/detection-of-axonal-synapses-in-3d-two-photon-images
#3
Cher Bass, Pyry Helkkula, Vincenzo De Paola, Claudia Clopath, Anil Anthony Bharath
Studies of structural plasticity in the brain often require the detection and analysis of axonal synapses (boutons). To date, bouton detection has been largely manual or semi-automated, relying on a step that traces the axons before detection the boutons. If tracing the axon fails, the accuracy of bouton detection is compromised. In this paper, we propose a new algorithm that does not require tracing the axon to detect axonal boutons in 3D two-photon images taken from the mouse cortex. To find the most appropriate techniques for this task, we compared several well-known algorithms for interest point detection and feature descriptor generation...
2017: PloS One
https://www.readbyqxmd.com/read/28846492/planktonic-subsidies-to-surf-zone-and-intertidal-communities
#4
Steven G Morgan, Alan L Shanks, Jamie H MacMahan, Ad J H M Reniers, Falk Feddersen
Plankton are transported onshore, providing subsidies of food and new recruits to surf-zone and intertidal communities. The transport of plankton to the surf zone is influenced by wind, wave, and tidal forcing, and whether they enter the surf zone depends on alongshore variation in surf-zone hydrodynamics caused by the interaction of breaking waves with coastal morphology. Areas with gently sloping shores and wide surf zones typically have orders-of-magnitude-higher concentrations of plankton in the surf zone and dense larval settlement in intertidal communities because of the presence of bathymetric rip currents, which are absent in areas with steep shores and narrow surf zones...
August 28, 2017: Annual Review of Marine Science
https://www.readbyqxmd.com/read/28840091/the-relationship-between-subjective-perception-and-the-psychological-effects-of-patients-in-spatial-isolation
#5
Fabienne Ibert, Monika Eckstein, Frank Günther, Nico T Mutters
Background: Spatial isolation is a common infection control measure, but negative psychological effects are often neglected. We investigated which factors influence the perception of single room isolated patients. Methods: In the present correlative cross-sectional study, 32 isolated patients have been interviewed within three departments of the Heidelberg University Hospital, one of Germany's largest hospitals. The following questionnaires were used: 10-Item Big Five Inventory (BFI-10), Positive and Negative Affect Schedule (PANAS), Hospital Anxiety and Depression Scale (HADS) and a self-developed questionnaire to evaluate the individual experience of isolation...
2017: GMS Hygiene and Infection Control
https://www.readbyqxmd.com/read/28830342/genetic-diversity-and-differentiation-patterns-in-micromeria-from-the-canary-islands-are-congruent-with-multiple-colonization-dynamics-and-the-establishment-of-species-syngameons
#6
M Curto, P Puppo, S Kratschmer, H Meimberg
BACKGROUND: Especially on islands closer to the mainland, such as the Canary Islands, different lineages that originated by multiple colonization events could have merged by hybridization, which then could have promoted radiation events (Herben et al., J Ecol 93: 572-575, 2005; Saunders and Gibson, J Ecol 93: 649-652, 2005; Caujapé-Castells, Jesters, red queens, boomerangs and surfers: a molecular outlook on the diversity of the Canarian endemic flora, 2011). This is an alternative to the scenario where evolution is mostly driven by drift (Silvertown, J Ecol 92: 168-173, 2004; Silvertown et al...
August 22, 2017: BMC Evolutionary Biology
https://www.readbyqxmd.com/read/28829928/green-tree-frog-hyla-cinerea-and-ground-squirrel-xerospermophilus-spilosoma-mortality-attributed-to-inland-brevetoxin-transportation-at-padre-island-national-seashore-texas-2015
#7
Danielle E Buttke, Alicia Walker, I-Shuo Huang, Leanne Flewelling, Julia Lankton, Anne E Ballmann, Travis Clapp, James Lindsay, Paul V Zimba
On 16 September 2015, a red tide (Karenia brevis) bloom impacted coastal areas of Padre Island National Seashore Park. Two days later and about 0.9 km inland, 30-40 adult green tree frogs (Hyla cinerea) were found dead after displaying tremors, weakness, labored breathing, and other signs of neurologic impairment. A rainstorm, accompanied by high winds, rough surf, and high tides, which could have aerosolized brevetoxin, occurred on the morning of the mortality event. Frog carcasses were healthy but contained significant brevetoxin in tissues...
August 22, 2017: Journal of Wildlife Diseases
https://www.readbyqxmd.com/read/28807668/evidence-that-blood-flukes-trematoda-aporocotylidae-of-chondrichthyans-infect-bivalves-as-intermediate-hosts-indications-of-an-ancient-diversification-of-the-schistosomatoidea
#8
Thomas H Cribb, Rowan C Chick, Wayne O'Connor, Stephan O'Connor, Daniel Johnson, Kim B Sewell, Scott C Cutmore
Blood flukes (Aporocotylidae) of actinopterygians (bony fishes) have been shown to infect freshwater gastropods and marine polychaetes as intermediate hosts. However, no life cycle is known for any aporocotylid of chondrichthyans (cartilaginous fishes) and no adult aporocotylid has been linked to a cercaria infecting a bivalve. Here we report two novel infections that fill these gaps. Cercariae consistent with the family Aporocotylidae were found developing in sporocysts in the gonad of the surf pipi, Donax deltoides Lamarck, 1818 (Bivalvia: Donacidae), from Stockton Beach, central New South Wales, Australia...
August 12, 2017: International Journal for Parasitology
https://www.readbyqxmd.com/read/28800640/knockdown-of-the-plasmodium-falciparum-surfin4-1-antigen-leads-to-an-increase-of-its-cognate-transcript
#9
Tatiane Macedo-Silva, Rosana Beatriz Duque Araujo, Kamila Anna Meissner, Wesley Luzetti Fotoran, Márcia Melo Medeiros, Mauro Ferreira de Azevedo, Gerhard Wunderlich
The genome of the malaria parasite Plasmodium falciparum contains the surf gene family which encodes large transmembrane proteins of unknown function. While some surf alleles appear to be expressed in sexual stages, others occur in asexual blood stage forms and may be associated to virulence-associated processes and undergo transcriptional switching. We accessed the transcription of surf genes along multiple invasions by real time PCR. Based on the observation of persistent expression of gene surf4.1, we created a parasite line which expresses a conditionally destabilized SURFIN4...
2017: PloS One
https://www.readbyqxmd.com/read/28792465/the-relationship-between-obesity-and-urban-environment-in-seoul
#10
Jungah Kim, Changwoo Shon, Seonju Yi
Obesity is a global pandemic that brings about a myriad of health consequences. In the past, policies for combating obesity mainly focused on improving individual health and behavior, but nowadays some policies have changed and now concentrate on improving the built environment believing this can improve health through positive changes to health-related behaviors. We examined whether both individual and environmental factors were associated with body mass index in Seoul, the capital city of South Korea. Data from the 2011 and 2013 Community Health Surveys were used (n = 20,147 men and 25,300 women)...
August 9, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28792063/youth-homelessness-and-vulnerability-how-does-couch-surfing-fit
#11
Susanna R Curry, Matthew Morton, Jennifer L Matjasko, Amy Dworsky, Gina M Samuels, David Schlueter
Youth homelessness is a problem characterized by high levels of vulnerability. The extent to which couch surfing - moving from one temporary housing arrangement to another - is part of youth homelessness is not well understood. Chapin Hall's Voices of Youth Count, a national research initiative, involves a multicomponent approach to studying youth homelessness. This study reports emerging findings regarding couch surfing and homelessness primarily from a national survey of 13,113 adults with youth ages 13-25 in their households or who are themselves ages 18-25...
August 9, 2017: American Journal of Community Psychology
https://www.readbyqxmd.com/read/28779843/ssm-based-electrophysiology-for-transporter-research
#12
Andre Bazzone, Maria Barthmes, Klaus Fendler
Functional characterization of transport proteins using conventional electrophysiology can be challenging, especially for low turnover transporters or transporters from bacteria and intracellular compartments. Solid-supported membrane (SSM)-based electrophysiology is a sensitive and cell-free assay technique for the characterization of electrogenic membrane proteins. Purified proteins reconstituted into proteoliposomes or membrane vesicles from cell culture or native tissues are adsorbed to the sensor holding an SSM...
2017: Methods in Enzymology
https://www.readbyqxmd.com/read/28764436/extraction-of-scattering-echo-time-by-surf-noise-background-subtracted-autocorrelation
#13
Xiaolei Li, Jing Chi, Dazhi Gao, Jie Li, Ning Wang
Extracting echo time is an important step in scatterer detection by ambient noise, while in general the scattered signal is weak and submerged in the background. An experiment of a Polyvinyl chloride pipe in a coastline surf noise environment is designed to extract the pipe's echo time by noise autocorrelation. As expected, the scattered wave of the pipe is submerged in an autocorrelation signal. A method called background subtracted autocorrelation is proposed in this paper, which can retrieve scattered echo time from autocorrelation signal effectively...
July 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28753349/surfing-on-protein-waves-proteophoresis-as-a-mechanism-for-bacterial-genome-partitioning
#14
J-C Walter, J Dorignac, V Lorman, J Rech, J-Y Bouet, M Nollmann, J Palmeri, A Parmeggiani, F Geniet
Efficient bacterial chromosome segregation typically requires the coordinated action of a three-component machinery, fueled by adenosine triphosphate, called the partition complex. We present a phenomenological model accounting for the dynamic activity of this system that is also relevant for the physics of catalytic particles in active environments. The model is obtained by coupling simple linear reaction-diffusion equations with a proteophoresis, or "volumetric" chemophoresis, force field that arises from protein-protein interactions and provides a physically viable mechanism for complex translocation...
July 14, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28735885/surface-hydrodynamics-of-viscoelastic-fluids-and-soft-solids-surfing-bulk-rheology-on-capillary-and-rayleigh-waves
#15
REVIEW
Francisco Monroy
From the recent advent of the new soft-micro technologies, the hydrodynamic theory of surface modes propagating on viscoelastic bodies has reinvigorated this field of technology with interesting predictions and new possible applications, so recovering its scientific interest very limited at birth to the academic scope. Today, a myriad of soft small objects, deformable meso- and micro-structures, and macroscopically viscoelastic bodies fabricated from colloids and polymers are already available in the materials catalogue...
July 18, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28730125/hard-exudates-referral-system-in-eye-fundus-utilizing-speeded-up-robust-features
#16
Syed Ali Gohar Naqvi, Hafiz Muhammad Faisal Zafar, Ihsanul Haq
In the paper a referral system to assist the medical experts in the screening/referral of diabetic retinopathy is suggested. The system has been developed by a sequential use of different existing mathematical techniques. These techniques involve speeded up robust features (SURF), K-means clustering and visual dictionaries (VD). Three databases are mixed to test the working of the system when the sources are dissimilar. When experiments were performed an area under the curve (AUC) of 0.9343 was attained. The results acquired from the system are promising...
2017: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/28727747/plant-species-dispersed-by-galapagos-tortoises-surf-the-wave-of-habitat-suitability-under-anthropogenic-climate-change
#17
Diego Ellis-Soto, Stephen Blake, Alaaeldin Soultan, Anne Guézou, Fredy Cabrera, Stefan Lötters
Native biodiversity on the Galapagos Archipelago is severely threatened by invasive alien species. On Santa Cruz Island, the abundance of introduced plant species is low in the arid lowlands of the Galapagos National Park, but increases with elevation into unprotected humid highlands. Two common alien plant species, guava (Psidium guajava) and passion fruit (Passiflora edulis) occur at higher elevations yet their seeds are dispersed into the lowlands by migrating Galapagos tortoises (Chelonoidis spp.). Tortoises transport large quantities of seeds over long distances into environments in which they have little or no chance of germination and survival under current climate conditions...
2017: PloS One
https://www.readbyqxmd.com/read/28708277/first-detection-of-gas-bubble-disease-and-rickettsia-like-organisms-in-paphies-ventricosa-a-new-zealand-surf-clam
#18
P M Ross, A Pande, J B Jones, J Cope, G Flowers
No abstract text is available yet for this article.
July 14, 2017: Journal of Fish Diseases
https://www.readbyqxmd.com/read/28703611/smartphone-based-momentary-intervention-for-alcohol-cravings-amongst-individuals-with-an-alcohol-use-disorder
#19
Patrick L Dulin, Vivian M Gonzalez
Smartphone-based alcohol interventions represent an innovative strategy for providing in-the-moment intervention to individuals with an alcohol use disorder. While early research into their overall effectiveness is promising, little is known about the efficacy of specific intervention tools in reducing drinking subsequent to a cued craving. This study examined the influence of smartphone-delivered in-the-moment coping strategies on drinking after experiencing a craving among participants utilizing the Location-Based Monitoring and Intervention for Alcohol Use Disorders (LBMI-A)...
August 2017: Psychology of Addictive Behaviors: Journal of the Society of Psychologists in Addictive Behaviors
https://www.readbyqxmd.com/read/28703066/cardiopulmonary-resuscitation-on-a-moving-boat
#20
(no author information available yet)
A study has found that surf lifeguards can deliver good-quality cardiopulmonary resuscitation (CPR) on moving inflatable rescue boats, but that it is less effective than when delivered onshore.
July 13, 2017: Emergency Nurse: the Journal of the RCN Accident and Emergency Nursing Association
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