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https://www.readbyqxmd.com/read/28633847/the-role-of-ultrasound-in-hydrogen-removal-and-microstructure-refinement-by-ultrasonic-argon-degassing-process
#1
Xuan Liu, Cheng Zhang, Zhiqiang Zhang, Jilai Xue, Qichi Le
In this work, the role of ultrasound in hydrogen removal and microstructure refinement by the ultrasonic argon degassing has been fully investigated by the experimental work in water and AZ91-0.4Ca magnesium melt, respectively. Ultrasound is able to break up argon gas into numbers of small bubbles and drive them diving deeply to the bottom of water, which are responsible for the efficient degassing regime of ultrasonic argon process. The argon flowrate plays a dominant role in promoting hydrogen removal effect...
September 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28631742/kidney-cancer-diving-into-the-genome-of-papillary-rcc-unearths-therapeutic-pearls
#2
Annette Fenner
No abstract text is available yet for this article.
June 20, 2017: Nature Reviews. Urology
https://www.readbyqxmd.com/read/28623225/high-peripheral-temperatures-in-king-penguins-while-resting-at-sea-thermoregulation-versus-fat-deposition
#3
Agnes Lewden, Manfred R Enstipp, Baptiste Picard, Tessa van Walsum, Yves Handrich
Marine endotherms living in cold water face an energetically challenging situation. Unless properly insulated these animals will lose heat rapidly. The field metabolic rate of king penguins at sea is about twice that on land. However, when at sea, their metabolic rate is higher during extended resting periods at the surface than during foraging, when birds descend to great depth in pursuit of their prey. This is most likely explained by differences in thermal status. During foraging peripheral vasoconstriction leads to a hypothermic shell, which is rewarmed during extended resting bouts at the surface...
June 16, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28622756/effects-of-implied-motion-and-facing-direction-on-positional-preferences-in-single-object-pictures
#4
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/28620696/tuning-ubiquinone-position-in-biomimetic-monolayer-membranes
#5
Javier Hoyo, Ester Guaus, Juan Torrent-Burgués
Artificial lipid bilayers have been extensively studied as models that mimic natural membranes (biomimetic membranes). Several attempts of biomimetic membranes inserting ubiquinone (UQ) have been performed to enlighten which the position of UQ in the lipid layer is, although obtaining contradictory results. In this work, pure components (DPPC and UQ) and DPPC:UQ mixtures have been studied using surface pressure-area isotherms and Langmuir-Blodgett (LB) films of the same compounds have been transferred onto solid substrates being topographically characterized on mica using atomic force microscopy and electrochemically on indium tin oxide slides...
June 2017: European Physical Journal. E, Soft Matter
https://www.readbyqxmd.com/read/28618495/robustness-of-synthetic-oscillators-in-growing-and-dividing-cells
#6
Joris Paijmans, David K Lubensky, Pieter Rein Ten Wolde
Synthetic biology sets out to implement new functions in cells, and to develop a deeper understanding of biological design principles. Elowitz and Leibler [Nature (London) 403, 335 (2000)NATUAS0028-083610.1038/35002125] showed that by rational design of the reaction network, and using existing biological components, they could create a network that exhibits periodic gene expression, dubbed the repressilator. More recently, Stricker et al. [Nature (London) 456, 516 (2008)NATUAS0028-083610.1038/nature07389] presented another synthetic oscillator, called the dual-feedback oscillator, which is more stable...
May 2017: Physical Review. E
https://www.readbyqxmd.com/read/28617634/dramatic-fighting-by-male-cuttlefish-for-a-female-mate
#7
Justine J Allen, Derya Akkaynak, Alexandra K Schnell, Roger T Hanlon
Male cuttlefish compete for females with a repertoire of visually dramatic behaviors. Laboratory experiments have explored this system in Sepia officinalis, but corroborative field data have eluded collection attempts by many researchers. While scuba diving in Turkey, we fortuitously filmed an intense sequence of consort/intruder behaviors in which the consort lost and then regained his female mate from the intruder. These agonistic bouts escalated in stages, leading to fast dramatic expression of the elaborate intense zebra display and culminating in biting and inking as the intruder male attempted a forced copulation of the female...
July 2017: American Naturalist
https://www.readbyqxmd.com/read/28612723/-circulating-tumor-cells-a-real-time-dive-into-malignant-plasticity
#8
Alexia Lopresti, Claire Acquaviva, Daniel Birnbaum, Émilie Mamessier
No abstract text is available yet for this article.
May 2017: Médecine Sciences: M/S
https://www.readbyqxmd.com/read/28600260/diving-into-research-of-biomedical-engineering-in-scuba-diving
#9
Tobias Cibis, Alistair McEwan, Bjoern Eskofier, John Lippmann, Karl Friedl, Michael Bennett
The physiologic response of the human body to different environments is a complex phenomenon to ensure survival. Immersion and compressed gas diving, together trigger a set of responses. Monitoring those responses in real-time may increase our understanding of these and help to develop safety procedures and equipment. This review outlines diving physiology and diseases and identifies physiological parameters worthy of monitoring. Subsequently, we have investigated technological approaches matched to those in order to evaluated their capability for underwater application...
June 7, 2017: IEEE Reviews in Biomedical Engineering
https://www.readbyqxmd.com/read/28598405/design-and-validation-of-a-breathing-detection-system-for-scuba-divers
#10
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/28594515/cervical-spine-injuries-in-the-athlete
#11
Gregory D Schroeder, Alexander R Vaccaro
Cervical spine injuries are common and range from relatively minor injuries, such as cervical muscle strains, to severe, life-threatening cervical fractures with spinal cord injuries. Although cervical spine injuries are most common in athletes who participate in contact and collision sports, such as rugby and American football, they also have been reported in athletes who participate in noncontact sports, such as baseball, gymnastics, and diving. Cervical spine injuries in athletes are not necessarily the result of substantial spine trauma; some athletes have chronic conditions, such as congenital stenosis, that increase their risk for a serious cervical spine injury after even minor trauma...
February 15, 2017: Instructional Course Lectures
https://www.readbyqxmd.com/read/28589838/a-novel-symbiotic-ciliate-ciliophora-peritrichia-in-the-hindgut-of-a-stag-beetle-coleoptera-lucanidae
#12
Masahiko Tanahashi, Xian Ying Meng, Takema Fukatsu
Bell-shaped ciliates of the subclass Peritrichia, such as Vorticella, Carchesium and Epistylis, are commonly found in freshwater and other aquatic environments, either solitary or colonial. Peritrichs attach to a substratum via a contractile or non-motile stalk, and collect food particles by water current using ciliary rows around the edge of the bell, called the peristome. Some peritrichs are epibiotic and ectocommensalistic associates of aquatic insects and other animals, settling on the surface of their specific hosts...
June 2017: Zoological Science
https://www.readbyqxmd.com/read/28586686/vision-and-lack-of-vision-in-the-ocean
#13
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/28579483/s-nitrosylation-of-gad65-is-implicated-in-decreased-gad-activity-and-oxygen-induced-seizures
#14
Heath G Gasier, Ivan T Demchenko, Lynn G Tatro, Claude A Piantadosi
Breathing oxygen at partial pressures ≥2.5 atmospheres absolute, which can occur in diving and hyperbaric oxygen (HBO2) therapy, can rapidly become toxic to the central nervous system (CNS). This neurotoxicity culminates in generalized EEG epileptiform discharges, tonic-clonic convulsions and ultimately death. Increased production of neuronal nitric oxide (NO) has been implicated in eliciting hyperoxic seizures by altering the equilibrium between glutamatergic and GABAergic synaptic transmission. Inhibition of glutamic acid decarboxylase (GAD) activity in HBO2 promotes this imbalance; however, the mechanisms by which this occurs is unknown...
June 1, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28578589/the-practice-of-health-program-evaluation
#15
Sarah R Lewis
The Practice of Health Program Evaluation provides an overview of the evaluation process for public health programs while diving deeper to address select advanced concepts and techniques. The book unfolds evaluation as a three-phased process consisting of identification of evaluation questions, data collection and analysis, and dissemination of results and recommendations. The text covers research design, sampling methods, as well as quantitative and qualitative approaches. Types of evaluation are also discussed, including economic assessment and systems research as relative newcomers...
June 1, 2017: Health Promotion Practice
https://www.readbyqxmd.com/read/28572687/defining-risk-variables-causing-gas-embolism-in-loggerhead-sea-turtles-caretta-caretta-caught-in-trawls-and-gillnets
#16
Andreas Fahlman, Jose Luis Crespo-Picazo, Blair Sterba-Boatwright, Brian A Stacy, Daniel Garcia-Parraga
Incidental capture, or 'bycatch' in fishing gear is a major global threat to sea turtle populations. A recent study showed that underwater entrapment in fishing gear followed by rapid decompression may cause gas bubble formation within the blood stream (embolism) and tissues leading to organ injury, impairment, and even mortality in some bycaught individuals. We analyzed data from 128 capture events using logistic and ordinal regression to examine risk factors associated with gas embolism in sea turtles captured in trawls and gillnets...
June 1, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28570332/environmental-neurologic-injuries
#17
Rodolfo Savica
PURPOSE OF REVIEW: This article discusses neurologic complications resulting from environmental injuries and the treatment modalities for these conditions. RECENT FINDINGS: Recent advances include improved management of altitude sickness. Relatively uncommon conditions, such as keraunoparalysis (lightning-induced paralysis) and high-pressure neurologic syndrome, are areas of ongoing study. SUMMARY: Environmental injuries may be associated with serious neurologic sequelae...
June 2017: Continuum: Lifelong Learning in Neurology
https://www.readbyqxmd.com/read/28552251/avoidance-responses-of-minke-whales-to-1-4khz-naval-sonar
#18
Petter H Kvadsheim, Stacy DeRuiter, Lise D Sivle, Jeremy Goldbogen, Rune Roland-Hansen, Patrick J O Miller, Frans-Peter A Lam, John Calambokidis, Ari Friedlaender, Fleur Visser, Peter L Tyack, Lars Kleivane, Brandon Southall
Minke whales are difficult to study and little information exists regarding their responses to anthropogenic sound. This study pools data from behavioural response studies off California and Norway. Data are derived from four tagged animals, of which one from each location was exposed to naval sonar signals. Statistical analyses were conducted using Mahalanobis distance to compare overall changes in parameters summarising dive behaviour, avoidance behaviour, and potential energetic costs of disturbance. Our quantitative analysis showed that both animals initiated avoidance behaviour, but responses were not associated with unusual dive behaviour...
May 25, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28550896/pediatric-near-drowning-events-do-they-warrant-trauma-team-activation
#19
Pranit N Chotai, Lisa Manning, Benjamin Eithun, Joshua C Ross, James W Eubanks, Chad Hamner, Ankush Gosain
BACKGROUND: The purpose of this study was to determine the incidence of traumatic injuries, factors associated with mortality, and need for pediatric trauma surgery involvement for drowning and near-drowning events in children. MATERIALS AND METHODS: An institutional review board-approved, retrospective chart review was performed at three American College of Surgeons-verified Pediatric Trauma Centers (2011-2014). Patients with International Classification of Diseases, Ninth Revision, codes or E-codes for fatal-nonfatal drowning, fall into water, accidental drowning, or submersion were included...
May 15, 2017: Journal of Surgical Research
https://www.readbyqxmd.com/read/28545600/hydrocarbon-assessment-and-prediction-due-to-the-gulf-war-oil-disaster-north-kuwait
#20
Yohannes Yihdego, Radwan A Al-Weshah
  Oil spill in the Gulf was the biggest disaster in history. The scale of damage was enormous, ranging from destruction caused by oil fires and oil spills, to economic decline for the Kuwaiti oil industry. The transport modelling of the freshwater aquifers in north Kuwait was undertaken to assess potential remediation scenarios using the MODFLOW-SURFACT numerical code. Three interlinked models were calibrated: flow, density (salinity), and transport. The model domain is a subregional area encompassing the Al-Raudhatain and Umm Al-Aish Basins...
June 1, 2017: Water Environment Research: a Research Publication of the Water Environment Federation
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