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https://www.readbyqxmd.com/read/28634648/fasciola-hepatica-a-diver-in-the-biliary-tree
#1
Aires Martins, Álvaro Gonçalves, Teresa Almeida, Luís Lopes, Alberto Midões
Fasciola hepatica is an endemic trematode that affects millions of people worldwide. The human being can be an accidental host through consumption of contaminated food or water. The authors present a case of hepatic fascioliasis in a 69-year-old Portuguese woman who recently traveled from Egypt, Brazil, and India.
June 20, 2017: Journal of Gastrointestinal Surgery: Official Journal of the Society for Surgery of the Alimentary Tract
https://www.readbyqxmd.com/read/28622756/effects-of-implied-motion-and-facing-direction-on-positional-preferences-in-single-object-pictures
#2
Stephen E Palmer, Thomas A Langlois
Palmer, Gardner, and Wickens studied aesthetic preferences for pictures of single objects and found a strong inward bias: Right-facing objects were preferred left-of-center and left-facing objects right-of-center. They found no effect of object motion (people and cars showed the same inward bias as chairs and teapots), but the objects were not depicted as moving. Here we measured analogous inward biases with objects depicted as moving with an implied direction and speed by having participants drag-and-drop target objects into the most aesthetically pleasing position...
July 2017: Perception
https://www.readbyqxmd.com/read/28602946/whole-genome-analysis-reveals-unexpected-dynamics-of-mutant-subclone-development-in-a-patient-with-jak2-v617f-positive-chronic-myeloid-leukemia
#3
I Sloma, M Mitjavila-Garcia, O Feraud, F Griscelli, N Oudrhiri, S El Marsafy, E Gobbo, D Divers, A Proust, D M Smadja, C Desterke, A Carles, Y Ma, M Hirst, M A Marra, C J Eaves, A Bennaceur-Griscelli, A G Turhan
We report here the first use of whole genome sequencing (WGS) to examine the initial clonal dynamics in an unusual patient with chronic myeloid leukemia (CML) who presented in chronic phase (CP) with doubly marked BCR-ABL1(+)/JAK2(V617F)-mutant cells and over a 9 year period progressed into an accelerated phase (AP) and then terminal blast phase (BP). WGS showed the diagnostic cells also contained mutations in ASXL1, SEC23B, MAD1L1 and RREB1, as well as 12,000 additional uncommon DNA variants. WGS of endothelial cells generated from circulating precursors revealed many of these were shared with the CML clone...
June 7, 2017: Experimental Hematology
https://www.readbyqxmd.com/read/28599331/-the-aging-retina-in-the-context-of-cerebral-neurodegenerative-diseases
#4
Michael R R Böhm, Solon Thanos
Background Neurodegenerative diseases (ND) consist of divers affections of the central nervous system related to etiology, localization, and of course of the disease. Alzheimer's disease (AD) and related dementias are best investigated together with socioeconomic conditions and play an important role in its high prevalence. This work will present ND diseases in the context of analogous retinal degeneration mechanisms and ophthalmological diseases. Methods Based on epidemiological data, the current neurological bibliography of ND has been considered...
June 9, 2017: Klinische Monatsblätter Für Augenheilkunde
https://www.readbyqxmd.com/read/28598405/design-and-validation-of-a-breathing-detection-system-for-scuba-divers
#5
Corentin Altepe, S Murat Egi, Tamer Ozyigit, D Ruzgar Sinoplu, Alessandro Marroni, Paola Pierleoni
Drowning is the major cause of death in self-contained underwater breathing apparatus (SCUBA) diving. This study proposes an embedded system with a live and light-weight algorithm which detects the breathing of divers through the analysis of the intermediate pressure (IP) signal of the SCUBA regulator. A system composed mainly of two pressure sensors and a low-power microcontroller was designed and programmed to record the pressure sensors signals and provide alarms in absence of breathing. An algorithm was developed to analyze the signals and identify inhalation events of the diver...
June 9, 2017: Sensors
https://www.readbyqxmd.com/read/28594836/enhancing-fish-underwater-visual-census-to-move-forward-assessment-of-fish-assemblages-an-application-in-three-mediterranean-marine-protected-areas
#6
Giulia Prato, Pierre Thiriet, Antonio Di Franco, Patrice Francour
Monitoring fish assemblages is needed to assess whether Marine Protected Areas (MPAs) are meeting their conservation and fisheries management goals, as it allows one to track the progress of recovery of exploited species and associated communities. Underwater Visual Census techniques (UVC) are used to monitor fish assemblages in MPAs. UVCs should be adapted to fish abundance, body-size and behaviour, which can strongly affect fish detectability. In Mediterranean subtidal habitats, however, UVC strip transects of one surface area (25x5 m2) are commonly used to survey the whole fish assemblage, from large shy fish to small crypto-benthic fish...
2017: PloS One
https://www.readbyqxmd.com/read/28586687/marine-bioacoustics
#7
John C Montgomery, Craig A Radford
The marine environment is the planet's largest, yet in many respects the least accessible. Our human sensory repertoire, with its emphasis on vision and air-adapted hearing, does not serve us well underwater. Underwater vision is often limited and as divers we find hearing of little, or no, use. Yet we know from the physics that underwater sound has properties well suited to serve as sensory and communication channels for suitably-adapted marine animals. The rapidly developing area of marine bioacoustics seeks to characterise underwater sound in relation to the acoustic capability of particular species (acoustic habitat), and discover the role of acoustics in the lives of marine animals (acoustic ecology) (Clarke et al...
June 5, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28586686/vision-and-lack-of-vision-in-the-ocean
#8
Justin Marshall
As land-locked animals, when we visualise the ocean our mind's eye may see crashing waves or a vast blue expanse stretching to the horizon, a raft of torpedoing penguins, a glimpse of colourful coral reef fish from the shark-free safety of a sandy beach. Underwater, the crystal-clear, and in fact not at all silent, world of Jacques Cousteau, or more recently David Attenborough, is a wonderland that some cannot wait to witness first hand as divers, while others are content to see it on a screen. Spend a bit of time underwater, in the English Channel for example, and a few facts emerge...
June 5, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28583413/effect-of-pulmonary-hyperinflation-on-central-blood-volume-an-mri-study
#9
Tanja Mijacika, Kasper Kyhl, Daria Frestad, F Otto Barak, Ivan Drvis, Niels H Secher, Zeljko Dujic, Per Lav Madsen
Pulmonary hyperinflation attained by glossopharyngeal insufflation (GPI) challenges the circulation by compressing the heart and pulmonary vasculature. Our aim was to determine the amount of blood translocated from the central blood volume during GPI. Cardiac output and cardiac chamber volumes were assessed by magnetic resonance imaging in twelve breath-hold divers at rest and during apnea with GPI. Pulmonary blood volume was determined from pulmonary blood flow and transit times for gadolinium during first-pass perfusion after intravenous injection...
June 3, 2017: Respiratory Physiology & Neurobiology
https://www.readbyqxmd.com/read/28583179/comparison-between-the-effects-of-potassium-phosphite-and-chitosan-on-changes-in-the-concentration-of-cucurbitacin-e-and-on-antibacterial-property-of-cucumis-sativus
#10
Moazzameh Ramezani, Fatemeh Rahmani, Ali Dehestani
BACKGROUND: Cucurbitacins are mostly found in the members of the family Cucurbitaceae and are responsible for the bitter taste of cucumber. Pharmacological activities such as anti-bacterial and anti-tumor effects have been attributed to these structurally divers triterpens. The aim of this study was to investigate the effect of potassium phosphite (KPhi) and chitosan on Cucurbitacin E (CuE) concentration in different tissues of Cucumis sativus. The antibacterial effect of plant ethanolic extracts was also examined against E...
June 5, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28573007/depth-dependent-effects-of-culling-do-mesophotic-lionfish-populations-undermine-current-management
#11
Dominic A Andradi-Brown, Rachel Grey, Alicia Hendrix, Drew Hitchner, Christina L Hunt, Erika Gress, Konrad Madej, Rachel L Parry, Catriona Régnier-McKellar, Owen P Jones, María Arteaga, Andrea P Izaguirre, Alex D Rogers, Dan A Exton
Invasive lionfish (Pterois volitans and P. miles) have spread widely across the western Atlantic and are recognized as a major threat to native marine biodiversity. Although lionfish inhabit both shallow reefs and mesophotic coral ecosystems (MCEs; reefs from 30 to 150 m depth), the primary management response implemented by many countries has been diver-led culling limited to reefs less than 30 m. However, many reef fish undergo ontogenetic migrations, with the largest and therefore most fecund individuals found at greatest depths...
May 2017: Royal Society Open Science
https://www.readbyqxmd.com/read/28567151/trends-in-management-of-radial-head-and-olecranon-fractures
#12
Matthew Motisi, Jennifer Kurowicki, Derek D Berglund, Jacob J Triplet, Shanell Disla, Timothy Niedzielak, Jonathan C Levy
BACKGROUND: Advancement in surgical techniques and implants has improved the ability to manage radial head and olecranon fractures. However, trends in management of these fractures are largely unstudied. OBJECTIVE: This purpose of this study is to evaluate management trends for these common fractures. METHODS: A retrospective review of a comprehensive Humana database was performed using Pearl Diver supercomputer (Warsaw, IN, USA) for radial head and neck (RHNF) and olecranon fractures (OF) between 2007 and 2014...
2017: Open Orthopaedics Journal
https://www.readbyqxmd.com/read/28558306/user-fees-across-ecosystem-boundaries-are-scuba-divers-willing-to-pay-for-terrestrial-biodiversity-conservation
#13
Michaela Roberts, Nick Hanley, Will Cresswell
While ecological links between ecosystems have been long recognised, management rarely crosses ecosystem boundaries. Coral reefs are susceptible to damage through terrestrial run-off, and failing to account for this within management threatens reef protection. In order to quantify the extent to that coral reef users are willing to support management actions to improve ecosystem quality, we conducted a choice experiment with SCUBA divers on the island of Bonaire, Caribbean Netherlands. Specifically, we estimated their willingness to pay to reduce terrestrial overgrazing as a means to improve reef health...
May 27, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28554527/electroencephalographic-alpha-activity-modulations-induced-by-breath-holding-in-apnoea-divers-and-non-divers
#14
Fabian Steinberg, Nils Henrik Pixa, Michael Doppelmayr
Little is known regarding cortical responses to sustained breath-holding (BH) in expert apnoea divers. The present study therefore investigated electroencephalographic (EEG) alpha activity and asymmetries in apnoea divers (experts) compared to non-divers (novices). EEG of 10 apnoea and 10 non-divers were recorded in the laboratory for either four minutes or for two minutes of BH. Alpha activity and alpha asymmetry (i.e. hemispherical EEG differences) were calculated and compared between expertise level and BH duration...
May 26, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28531363/beneficial-effect-of-enriched-air-nitrox-on-bubble-formation-during-scuba-diving-an-open-water-study
#15
Anne-Kathrin Brebeck, Andreas Deussen, Ursula Range, Costantino Balestra, Sinclair Cleveland, Jochen D Schipke
Bubble formation during scuba diving might induce decompression sickness. This prospective randomised and double-blind study included 108 advanced recreational divers (38 females). Fifty-four pairs of divers, 1 breathing air and the other breathing nitrox28 undertook a standardised dive (24 ± 1 msw; 62 ± 5min) in the Red Sea. Venous gas bubbles were counted (Doppler) 30-<45 min (early) and 45-60 min (late) post-dive at jugular, subclavian and femoral sites. Only 7% (air) vs. 11% (air28®) (n.s.) were bubble-free after a dive...
May 21, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28525588/diving-and-long-term-cardiovascular-health
#16
K Åsmul, Å Irgens, M Grønning, A Møllerløkken
Background: Short-term cardiovascular effects from ambient pressure exposure are known. However, long-term cardiovascular effects from diving in humans have been less studied. Aims: To examine possible long-term cardiovascular health effects from occupational diving. Methods: We compared the prevalence of cardiovascular disease in former divers to non-divers. We obtained data on male former divers with a certificate valid for professional diving after 1980, from the Norwegian Diver 2011 project, and matched data on the general male population from the HUNT3 Survey...
May 19, 2017: Occupational Medicine
https://www.readbyqxmd.com/read/28518008/latent-presentation-of-decompression-sickness-after-altitude-chamber-training-in-an-active-duty-flier
#17
James Gentry, Juan Rango, Jianzhong Zhang, Shane Biedermann
BACKGROUND: Decompression sickness (DCS) is a potential danger and risk for both divers and aircrew alike. DCS is also a potential side effect of altitude (hypobaric) chamber training as well and can present long after training occurs. Literature review shows that altitude chamber induced DCS has approximately a 0.25% incidence. CASE REPORT: A 32-yr-old, active duty military member developed symptoms of DCS 3 h after his hypobaric chamber training. Unfortunately, he did not seek treatment for DCS until 48 h after the exposure...
April 1, 2017: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/28515170/respiratory-function-and-mechanics-in-pinnipeds-and-cetaceans
#18
REVIEW
Andreas Fahlman, Michael J Moore, Daniel Garcia-Parraga
In this Review, we focus on the functional properties of the respiratory system of pinnipeds and cetaceans, and briefly summarize the underlying anatomy; in doing so, we provide an overview of what is currently known about their respiratory physiology and mechanics. While exposure to high pressure is a common challenge among breath-hold divers, there is a large variation in respiratory anatomy, function and capacity between species - how are these traits adapted to allow the animals to withstand the physiological challenges faced during dives? The ultra-deep diving feats of some marine mammals defy our current understanding of respiratory physiology and lung mechanics...
May 15, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28501412/sudden-death-in-a-diver-a-diagnostic-conundrum
#19
Scott Dougherty, Maziar Khorsandi, Myra Adelbai, Vipin Zamvar, James Francis
We discuss the case of an experienced diver who ran out of air during his final ascent while scuba diving. He lost consciousness rapidly after surfacing and despite immediate cardiopulmonary resuscitation, could not be revived. On arrival at the emergency department he was noted to have copious amounts of blood in his upper airway and had developed extensive subcutaneous emphysema. Large amounts of air were observed in the central circulation following a postmortem computerized tomography scan as well as pneumomediastinum, a small right-sided hemothorax, and extensive subcutaneous emphysema...
May 10, 2017: Wilderness & Environmental Medicine
https://www.readbyqxmd.com/read/28480488/mishaps-and-unsafe-conditions-in-recreational-scuba-diving-and-pre-dive-checklist-use-a-prospective-cohort-study
#20
Shabbar I Ranapurwala, Steve Wing, Charles Poole, Kristen L Kucera, Stephen W Marshall, Petar J Denoble
BACKGROUND: Recreational scuba diving involves the use of complex instruments and specialized skills in an unforgiving environment. Errors in dive preparation in such an environment may lead to unsafe conditions, mishaps, injuries and fatalities. Diving mishaps can be major and minor based on their potential to cause injury and the severity of the resulting injury. The objective of this study is to assess the incidence of diving mishaps and unsafe conditions, and their associations with the participants' routine use of their own checklists...
December 2017: Injury Epidemiology
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