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https://www.readbyqxmd.com/read/29131641/qcm-d-investigation-of-swelling-behavior-of-layer-by-layer-thin-films-upon-exposure-to-monovalent-ions
#1
Joshua T O'Neal, Ethan Y Dai, Yanpu Zhang, Kyle B Clark, Kathryn G Wilcox, Ian M George, Nandha E Ramasamy, Daisy Enriquez, Piotr Batys, Maria Sammalkorpi, Jodie L Lutkenhaus
Polyelectrolyte multilayers and layer-by-layer assemblies are susceptible to structural changes in response to ionic environment. By altering the salt type and ionic strength, structural changes can be induced by disruption of intrinsically bound ion pairs within the multilayer network via electrostatic screening. Notably, high salt concentrations have been used for the purposes of salt-annealing and self-healing of LbL assemblies with KBr, in particular, yielding a remarkably rapid response. However, to date, the structural and swelling effects of various monovalent ion species on the behavior of LbL assemblies remain unclear, including a quantitative view of ion content in the LbL assembly and thickness changes over a wide concentration window...
November 13, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29114161/a-new-species-of-ophryotrocha-annelida-eunicida-dorvilleidae-from-hydrothermal-vents-on-the-southwest-indian-ridge
#2
Dong-Sheng Zhang, Ya-Dong Zhou, Chun-Sheng Wang, Greg W Rouse
Dorvilleids were collected from hydrothermal vents on the Southwest Indian Ridge by manned submersible Jiaolong. These represent a new species of Ophryotrocha that is here described as Ophryotrocha jiaolongisp. n. This is the first dorvilleid described from vents on the Southwest Indian Ridge. It most closely resembles another vent species, Ophryotrocha akessoni Blake, 1985 from the Galapagos Rift, but can be distinguished by its antennae, palps, jaw structure. The new species has particularly distinctive mandibles, which allow it to be easily identified...
2017: ZooKeys
https://www.readbyqxmd.com/read/29099523/a-potential-strategy-for-counteracting-age-related-sarcopenia-preliminary-evidence-of-combined-exercise-training-and-leucine-supplementation
#3
Z Xia, J M Cholewa, Y Zhao, Y Yang, H Shang, H Jiang, Q Su, N E Zanchi
Previous research has demonstrated the positive effects of concurrent/combined aerobic and resistance exercise or leucine supplementation on skeletal muscle protein synthesis (MPS) and hypertrophy in aging organisms. However, the effects of a multimodal intervention which combines both aerobic and resistance exercise and leucine supplementation has not been fully elucidated. Eighteen month old and 2 month old C57BL/6 mice were assigned to aging control (AC, n = 8), aging and multimodal intervention (AMI, n = 8) and young control (YC, n = 8)...
November 3, 2017: Food & Function
https://www.readbyqxmd.com/read/29096439/capillary-effect-enabled-water-electrolysis-for-enhanced-electrochemical-ozone-production-by-using-bulk-porous-electrode
#4
Chen Zhang, Yingfeng Xu, Ping Lu, Xiaohua Zhang, FangFang Xu, Jianlin Shi
A significant overpotential necessary for the electrochemical oxygen evolution reaction (OER) is one of the most serious disad-vantages in water electrolysis, which, on the contrary, gives the probability to electrochemically produce ozone alternative to the common corona discharge. To effectively suppress the competitive OER and improve gaseous ozone escaping, here, we present a capillary effect-enabled electrolysis strategy by employing an unusual partial-submersed mode of anode composed of a β-PbO2 cuboids-loaded bulk porous Pb, and realize a much enhanced electrocatalytic gaseous ozone production in comparison to the cases of solid Pb counterpart and/or usual submersion operation...
November 2, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29089835/a-new-species-of-deep-sea-sponge-associated-shrimp-from-the-north-west-pacific-decapoda-stenopodidea-spongicolidae
#5
Peng Xu, Yadong Zhou, Chunsheng Wang
A new species of the deep-sea spongicolid genus Spongicoloides Hansen, 1908 is described and illustrated based on material from the northwestern Pacific. Spongicoloides weijiaensissp. n. was found inside a hexactinellid sponge, Euplectella sp., sampled by the Chinese manned submersible "Jiaolong" at depths of 2279 m near the Weijia Guyot, in the Magellan Seamount Chain. The new species can be distinguished from all congeneric species by several morphological features, involving gill formula, spination of the carapace, antennal scale, third pereiopod, telson and uropod, posteroventral teeth of the pleura, and dactyli of the fourth and fifth pereiopods...
2017: ZooKeys
https://www.readbyqxmd.com/read/29071453/donor-cornea-tissue-in-cases-of-drowning-or-water-submersion-eye-banks-practice-patterns-and-tissue-outcomes
#6
Nithya P Vijayakumar, Purak Parikh, Shahzad I Mian, Brad Tennant, Gregory H Grossman, Bob Albrecht, Leslie M Niziol, Maria A Woodward
Surgical use of donor corneal tissue from victims of water submersion (drowning or submersion secondary to death) remains controversial due to limited evidence about the quality of these tissues. To assess the safety of donor corneal tissue from victims of water submersion, an investigation of eye banks' practice patterns and tissue outcomes was conducted. All 79 Eye Bank Association of America accredited eye banks were contacted for a phone interview of practices regarding tissue from victims of water submersion...
October 25, 2017: Cell and Tissue Banking
https://www.readbyqxmd.com/read/29064712/superhydrophobicity-from-the-inside
#7
Tomer Simovich, Cameron Ritchie, George Belev, Robert Norman Lamb
The nature of trapped air on submersed ultra-water-repellent interfaces has been investigated. These gaseous layers (plastrons) can last from hours to, in some examples such as the Salvinia molesta fern, months. The interface of submerged superhydrophobic surfaces with carefully controlled micro-patterned surface roughness has been probed using synchrotron based high resolution X-ray phase tomography. This technique looks in situ, through the aqueous/gas interface in three dimensions. Long term plastron stability appears to correlate with the appearance of scattered micro-droplets less than 20 μm in diameter that are sandwiched within the 30 μm thick gaseous interfacial layer...
October 24, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29063587/carbon-dioxide-and-submersed-macrophytes-in-lakes-linking-functional-ecology-to-community-composition
#8
John E Titus, Angela M Pagano
Evaluating plant community response to atmospheric CO2 rise is critical to predicting ecosystem level change. Freshwater lakes offer a model system for examining CO2 effects as submersed macrophyte species differ greatly in their growth responses to CO2 enrichment, and free CO2 concentrations among these habitats show a wide range of natural, spatial variation. We determined free CO2 concentrations in the water column and sediment porewater in littoral zones with pH < 6.0 in Adirondack Mountain (New York, USA) lakes, and derived a community CO2 responsiveness index (CCRI) based on quantitative sampling of 15 submersed macrophyte communities coupled with greenhouse-derived growth responses to CO2 enrichment of constituent species to test two hypotheses: (1) CCRI, which is higher for communities dominated by species with greater growth responses to CO2 enrichment, is positively correlated to free [CO2 ] in the water column, and (2) in natural communities, the percent of sediment CO2 -using species, which are relatively unresponsive to CO2 enrichment, is negatively correlated to free [CO2 ]...
October 24, 2017: Ecology
https://www.readbyqxmd.com/read/29059514/organic-solvent-free-fabrication-of-durable-and-multifunctional-superhydrophobic-paper-from-waterborne-fluorinated-cellulose-nanofiber-building-blocks
#9
Avijit Baidya, Mohd Azhardin Ganayee, Swathy Jakka Ravindran, Kam Chiu Tam, Sarit Kumar Das, Robin H A Ras, Thalappil Pradeep
In view of a great demand for paper-based technologies, nonwettable fibrous substrates with excellent durability have drawn much attention in recent years. In this context, the use of cellulose nanofibers (CNFs), the smallest unit of cellulosic substrates (5-20 nm wide and 500 nm to several microns in length), to design waterproof paper can be an economical and smart approach. In this study, an eco-friendly and facile methodology to develop a multifunctional waterproof paper via the fabrication of fluoroalkyl functionalized CNFs in the aqueous medium is presented...
October 27, 2017: ACS Nano
https://www.readbyqxmd.com/read/29019627/dry-drowning-myths-and-misconceptions
#10
M Denise Dowd
Drowning is a leading cause of death in children and is highly preventable. More than 10 people die of drowning in the United States each day, most of them adults. Rates of drowning are highest in children given their developmental vulnerabilities. Drowning incidents that result in cardiopulmonary arrest have a straightforward emergency clinical response, but the management approaches to the more common scenario of brief, nonfatal submersion is less clear. Clinicians must make clinical-care decisions based on evidence to provide safe and effective care in a timely manner and to help families avoid unnecessary anxiety...
October 1, 2017: Pediatric Annals
https://www.readbyqxmd.com/read/28961275/eggshell-ultrastructure-and-delivery-of-pharmacological-inhibitors-to-the-early-embryo-of-r-prolixus-by-ethanol-permeabilization-of-the-extraembryonic-layers
#11
Larissa Bomfim, Priscila Vieira, Ariene Fonseca, Isabela Ramos
Most vectors of arthropod-borne diseases produce large eggs with hard and opaque eggshells. In several species, it is still not possible to induce molecular perturbations to the embryo by delivery of molecules using microinjections or eggshell permeabilization without losing embryo viability, which impairs basic studies regarding development and population control. Here we tested the properties and permeability of the eggshell of R. prolixus, a Chagas disease vector, with the aim to deliver pharmacological inhibitors to the egg cytoplasm and allow controlled molecular changes to the embryo...
2017: PloS One
https://www.readbyqxmd.com/read/28954516/high-resolution-in-situ-measurement-of-nitrate-in-runoff-from-the-greenland-ice-sheet
#12
Alexander D Beaton, Jemma L Wadham, Jon Hawkings, Elizabeth A Bagshaw, Guillaume Lamarche-Gagnon, Matthew C Mowlem, Martyn Tranter
We report the first in situ high-resolution nitrate time series from two proglacial meltwater rivers draining the Greenland Ice Sheet, using a recently developed submersible analyzer based on lab-on-chip (LOC) technology. The low sample volume (320 μL) required by the LOC analyzer meant that low concentration (few micromolar to submicromolar), highly turbid subglacial meltwater could be filtered and colorimetrically analyzed in situ. Nitrate concentrations in rivers draining Leverett Glacier in southwest Greenland and Kiattuut Sermiat in southern Greenland exhibited a clear diurnal signal and a gradual decline at the commencement of the melt season, displaying trends that would not be discernible using traditional daily manual sampling...
November 7, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28922960/cognitive-performance-in-transient-global-hypoxic-brain-injury-due-to-moderate-drowning
#13
Mariana Penteado Nucci, Katerina Lukasova, Gilson Vieira, João Ricardo Sato, Edson Amaro Júnior
INTRODUCTION: Drowning is a serious and frequently neglected public health threat. Primary respiratory impairment after submersion often leads to brain dysfunction. Depending on the period of global hypoxia (respiratory failure), clinical aspects of neurological dysfunction are evident on the first evaluation after the water rescue. Nowadays, many neuropsychological assessments after drowning are inconclusive, with some studies reporting only minor neurological or cognitive impairments...
September 19, 2017: Journal of Clinical and Experimental Neuropsychology
https://www.readbyqxmd.com/read/28915277/a-portable-bioelectronic-sensing-system-bessy-for-environmental-deployment-incorporating-differential-microbial-sensing-in-miniaturized-reactors
#14
Alyssa Y Zhou, Moshe Baruch, Caroline M Ajo-Franklin, Michel M Maharbiz
Current technologies are lacking in the area of deployable, in situ monitoring of complex chemicals in environmental applications. Microorganisms metabolize various chemical compounds and can be engineered to be analyte-specific making them naturally suited for robust chemical sensing. However, current electrochemical microbial biosensors use large and expensive electrochemistry equipment not suitable for on-site, real-time environmental analysis. Here we demonstrate a miniaturized, autonomous bioelectronic sensing system (BESSY) suitable for deployment for instantaneous and continuous sensing applications...
2017: PloS One
https://www.readbyqxmd.com/read/28915131/body-mass-index-and-saltwater-drowning
#15
Roger W Byard
Comparison of body mass index (BMI) was undertaken between 30 cases of salt water drowning and 30 age- and sex-matched controls randomly selected from the autopsy files of Forensic Science SA, Adelaide, Australia, during the period 2000 to 2017. The age range of drowning cases and controls was 18 to 80 (average, 49) years, with a male to female ratio of 19:11. The BMIs of the drowning cases ranged from 15.5 to 37.5 (average, 25.4; median, 23). The control cases had higher BMIs ranging from 22.9 to 44.3 (average, 29...
December 2017: American Journal of Forensic Medicine and Pathology
https://www.readbyqxmd.com/read/28898829/sugarcane-vinasse-treatment-by-two-stage-anaerobic-membrane-bioreactor-effect-of-hydraulic-retention-time-on-changes-in-efficiency-biogas-production-and-membrane-fouling
#16
Fábio S Santos, Bárbara C Ricci, Luzia S França Neta, Míriam C S Amaral
This research investigated the effect of hydraulic retention time (HRT) on two-stage anaerobic membrane bioreactor (2-SAnMBR) performance treating sugarcane vinasse. The experimental setup consisted of an upflow acidogenic reactor and a continuous stirred methanogenic reactor, fitted with submersed microfiltration hollow-fiber membranes. The results indicated excellent performance and robustness of 2-SAnMBR. The reduction in HRT of 5.3-3.1days did not cause loss of its performance. The 2-SAnMBR showed high capacity of removing organic matter (97%), producing biogas (6...
December 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28890175/effect-of-the-pulmonary-deposition-and-in-vitro-permeability-on-the-prediction-of-plasma-levels-of-inhaled-budesonide-formulation
#17
Sharareh Salar-Behzadi, Shengqian Wu, Annalisa Mercuri, Claudia Meindl, Sandra Stranzinger, Eleonore Fröhlich
The growing interest in the inhalable pharmaceutical products requires advanced approaches to safe and fast product development, such as in silico tools that can be used for estimating the bioavailability and toxicity of developed formulation. GastroPlus™ is one of the few available software packages for in silico simulation of PBPK profile of inhalable products. It contains a complementary module for calculating the lung deposition, the permeability and the systemic absorption of inhalable products. Experimental values of lung deposition and permeability can also be used...
September 7, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28840329/organ-and-effective-dose-rate-coefficients-for-submersion-exposure-in-occupational-settings
#18
K G Veinot, S A Dewji, M M Hiller, K F Eckerman, C E Easterly
External dose coefficients for environmental exposure scenarios are often computed using assumption on infinite or semi-infinite radiation sources. For example, in the case of a person standing on contaminated ground, the source is assumed to be distributed at a given depth (or between various depths) and extending outwards to an essentially infinite distance. In the case of exposure to contaminated air, the person is modeled as standing within a cloud of infinite, or semi-infinite, source distribution. However, these scenarios do not mimic common workplace environments where scatter off walls and ceilings may significantly alter the energy spectrum and dose coefficients...
November 2017: Radiation and Environmental Biophysics
https://www.readbyqxmd.com/read/28833853/the-pediatric-submersion-score-predicts-children-at-low-risk-for-injury-following-submersions
#19
Rohit P Shenoi, Sachin Allahabadi, Daniel M Rubalcava, Elizabeth A Camp
OBJECTIVES: Pediatric submersion victims often require admission. We wanted to identify a cohort of children at low risk for submersion-related injury who can be safely discharged from the emergency department (ED) after a period of observation. METHODS: This was a single-center retrospective derivation/validation cross-sectional study of children (0-18 years) who presented postsubmersion to a tertiary care, children's hospital ED from 2008 to 2015. We reviewed demographics, comorbidities, and prehospital and ED course...
August 18, 2017: Academic Emergency Medicine: Official Journal of the Society for Academic Emergency Medicine
https://www.readbyqxmd.com/read/28832830/using-in-situ-flow-cytometry-images-of-ciliates-and-dinoflagellates-for-aquatic-system-monitoring
#20
G C Pereira, A R Figueiredo, N F F Ebecken
Short-period variability in plankton communities is poorly documented, especially for variations occurring in specific groups in the assemblage because traditional analysis is laborious and time-consuming. Moreover, it does not allow the high sampling frequency required for decision making. To overcome this limitation, we tested the submersible CytoSub flow cytometer. This device was anchored at a distance of approximately 10 metres from the low tide line at a depth of 1.5 metres for 12 hours to monitor the plankton at a site in the biological reserve of Barra da Tijuca beach, Rio de Janeiro...
August 17, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
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