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https://www.readbyqxmd.com/read/29791884/rainfall-as-primary-driver-of-discharge-and-solute-export-from-rock-glaciers-the-col-d-olen-rock-glacier-in-the-nw-italian-alps
#1
Nicola Colombo, Stephan Gruber, Maria Martin, Mery Malandrino, Andrea Magnani, Danilo Godone, Michele Freppaz, Simona Fratianni, Franco Salerno
Three hypotheses exist to explain how meteorological variables drive the amount and concentration of solute-enriched water from rock glaciers: (1) Warm periods cause increased subsurface ice melt, which releases solutes; (2) rain periods and the melt of long-lasting snow enhance dilution of rock-glacier outflows; and (3) percolation of rain through rock glaciers facilitates the export of solutes, causing an opposite effect as that described in hypothesis (2). This lack of detailed understanding likely exists because suitable studies of meteorological variables, hydrologic processes and chemical characteristics of water bodies downstream from rock glaciers are unavailable...
May 20, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29790617/plant-growth-chamber-design-for-subambient-pco-2-and-%C3%AE-13-c-studies
#2
William M Hagopian, Brian A Schubert, Robert A Graper, A Hope Jahren
RATIONALE: Subambient pCO2 has persisted across the major Phanerozoic ice ages, including the entire late Cenozoic (~30 Ma to present). Stable isotope analysis of plant-derived organic matter is used to infer changes in pCO2 and climate in the geologic past, but a growth chamber that can precisely control environmental conditions, including pCO2 and δ13 C value of CO2 (δ13 CCO2 ) at subambient pCO2 , is lacking. METHODS: We designed and built five identical chambers specifically for plant growth under stable subambient pCO2 (~100 to 400 ppm) and δ13 CCO2 conditions...
May 23, 2018: Rapid Communications in Mass Spectrometry: RCM
https://www.readbyqxmd.com/read/29790512/probing-the-interaction-between-solid-benzene-and-water-using-vacuum-ultraviolet-and-infrared-spectroscopy
#3
Anita Dawes, Natalia Pascual, Nigel J Mason, Sabrina Gärtner, Søren V Hoffmann, Nykola C Jones
We present results of a combined vacuum ultraviolet (VUV) and infrared (IR) photoabsorption study of amorphous benzene : water mixtures and layers to investigate the benzene-water interaction in the solid phase. VUV spectra of 1 : 1, 1 : 10 and 1 : 100 benzene : water mixtures at 24 K reveal a concentration dependent shift in the energies of the 1B2u, 1B1u and 1E1u electronic states of benzene. All the electronic bands blueshift from pure amorphous benzene towards gas phase energies with increasing water concentration...
May 23, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29790035/feasibility-of-intracardiac-echocardiography-imaging-from-the-left-superior-pulmonary-vein-for-left-atrial-appendage-occlusion
#4
Do Young Kim, Seung Yong Shin, Jin-Seok Kim, Seong Hwan Kim, Young-Hoon Kim, Hong Euy Lim
Intracardiac echocardiography (ICE) is considered an alternative imaging modality for left atrium appendage occlusion (LAAO) to avoid general anesthesia. However, the quality of ICE images obtained from right atrium can be suboptimal compared with transesophageal echocardiography (TEE) imaging. Although placing an ICE probe into left atrium can improve imaging quality, there are limited data regarding procedure outcomes of ICE-guided LAAO versus TEE-guided LAAO. One hundred forty four patients who underwent LAAO with Amplatzer Cardiac Plug, Amulet, or Watchman device were enrolled from two referral institutes...
May 22, 2018: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/29789733/why-your-feet-slip-and-slide-on-ice
#5
(no author information available yet)
No abstract text is available yet for this article.
May 2018: Nature
https://www.readbyqxmd.com/read/29789087/individual-differences-in-adaptability-to-isolated-confined-and-extreme-environments
#6
Paul T Bartone, Gerald P Krueger, Jocelyn V Bartone
INTRODUCTION: Future deep space missions will expose astronauts to more intense stressors than previously encountered. Isolation will be greater and more prolonged, living and work areas more confined, and communications and resupply channels to Earth longer and less reliable. Astronauts will need to function more autonomously, with less guidance and support from Earth. Thus, it is important to select and train astronauts who can adapt and function effectively under extreme and variable conditions...
June 1, 2018: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/29787251/carbon-dioxide-mediated-c-sp3-h-arylation-of-amine-substrates
#7
Mohit Kapoor, Daniel Liu, Michael C Young
Elaborating amines via C-H functionalization has been an important area of research over the last decade, but has generally relied on an added directing group or sterically hindered amine approach. Since free amine-directed C(sp3)-H activation is still primarily limited to cyclization reactions, and to improve the sustainability and reaction scope of amine-based C-H activation, we present a strategy using CO2 in the form of dry ice that facilitates intermolecular C‒H aryla-tion. This methodology has been used to enable an operationally simple procedure whereby 1º and 2º aliphatic amines can be ary-lated selectively at their γ-C-H positions...
May 22, 2018: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29785750/cellulose-membrane-modified-with-polypyrrole-as-an-extraction-device-for-the-determination-of-emerging-contaminants-in-river-water-with-gc-ms
#8
Bárbara Viero de Noronha, Márcio Fernando Bergamini, Luiz Humberto Marcolino Junior, Bruno José Gonçalves da Silva
In this study, a simple, efficient, and reusable device based on cellulose membranes modified with polypyrrole was developed to extract 14 emerging contaminants from aqueous matrices. For chemical polymerization, a low-cost cellulose membrane was immersed in 0.1 mol L-1 pyrrole and 0.5 mol L-1 ammonium persulfate for 40 min in an ice/water bath. The cellulose membranes modified with polypyrrole were accommodated in a polycarbonate holder suitable for solid-phase extraction disks. Solid-phase extraction parameters that affect extraction efficiency, such as sample volume, pH, flow-rate, and desorption were optimized...
May 21, 2018: Journal of Separation Science
https://www.readbyqxmd.com/read/29785525/beyond-the-border-and-into-the-heartland-spatial-patterning-of-u-s-immigration-detention
#9
Margot Moinester
The expansion of U.S. immigration enforcement from the borders into the interior of the country and the fivefold increase in immigration detentions and deportations since 1995 raise important questions about how the enforcement of immigration law is spatially patterned across American communities. Focusing on the practice of immigration detention, the present study analyzes the records of all 717,160 noncitizens detained by Immigration and Customs Enforcement (ICE) in 2008 and 2009-a period when interior enforcement was at its peak-to estimate states' detention rates and examine geographic variation in detention outcomes, net of individual characteristics...
May 21, 2018: Demography
https://www.readbyqxmd.com/read/29785345/greenland-shark-somniosus-microcephalus-feeding-behavior-on-static-fishing-gear-effect-of-smart-selective-magnetic-and-repellent-treated-hook-deterrent-technology-and-factors-influencing-entanglement-in-bottom-longlines
#10
Scott M Grant, Rennie Sullivan, Kevin J Hedges
The Greenland Shark ( Somniosus microcephalus ) is the most common bycatch in the Greenland halibut ( Reinhardtius hippoglossoides ) bottom longline fishery in Cumberland Sound, Canada. Historically, this inshore fishery has been prosecuted through the ice during winter but winter storms and unpredictable landfast ice conditions since the mid-1990s have led to interest in developing a summer fishery during the ice-free season. However, bycatch of Greenland shark was found to increase substantially with 570 sharks captured during an experimental Greenland halibut summer fishery (i...
2018: PeerJ
https://www.readbyqxmd.com/read/29785066/low-temperature-cmut-fabrication-process-with-dielectric-lift-off-membrane-support-for-improved-reliability
#11
Amirabbas Pirouz, F Levent Degertekin
This paper reports an improved CMOS compatible low temperature sacrificial layer fabrication process for Capacitive Micromachined Ultrasonic Transducers (CMUTs). The process adds the fabrication step of silicon oxide evaporation which is followed by a lift-off step to define the membrane support area without a need for an extra mask. This simple addition improves reliability by reducing the electric field between the top and bottom electrodes everywhere except the moving membrane without affecting the vacuum gap thickness...
August 2018: Journal of Micromechanics and Microengineering: Structures, Devices, and Systems
https://www.readbyqxmd.com/read/29784952/vanishing-river-ice-cover-in-the-lower-part-of-the-danube-basin-signs-of-a-changing-climate
#12
M Ionita, C -A Badaluta, P Scholz, S Chelcea
Many of the world's largest rivers in the extra tropics are covered with ice during the cold season, and in the Northern Hemisphere approximately 60% of the rivers experience significant seasonal effects of river ice. Here we present an observational data set of the ice cover regime for the lower part of the Danube River which spans over the period 1837-2016, and its the longest one on record over this area. The results in this study emphasize the strong impact of climate change on the occurrence of ice regime especially in the second part of the 20th century...
May 21, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29784779/strong-and-highly-variable-push-of-ocean-waves-on-southern-ocean-sea-ice
#13
Justin E Stopa, Peter Sutherland, Fabrice Ardhuin
Sea ice in the Southern Ocean has expanded over most of the past 20 y, but the decline in sea ice since 2016 has taken experts by surprise. This recent evolution highlights the poor performance of numerical models for predicting extent and thickness, which is due to our poor understanding of ice dynamics. Ocean waves are known to play an important role in ice break-up and formation. In addition, as ocean waves decay, they cause a stress that pushes the ice in the direction of wave propagation. This wave stress could not previously be quantified due to insufficient observations at large scales...
May 21, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29784681/use-of-intracardiac-echocardiography-in-interventional-cardiology-working-with-the-anatomy-rather-than-fighting-it
#14
REVIEW
Andres Enriquez, Luis C Saenz, Raphael Rosso, Frank E Silvestry, David Callans, Francis E Marchlinski, Fermin Garcia
The indications for catheter-based structural and electrophysiological procedures have recently expanded to more complex scenarios, in which an accurate definition of the variable individual cardiac anatomy is key to obtain optimal results. Intracardiac echocardiography (ICE) is a unique imaging modality able to provide high-resolution real-time visualization of cardiac structures, continuous monitoring of catheter location within the heart, and early recognition of procedural complications, such as pericardial effusion or thrombus formation...
May 22, 2018: Circulation
https://www.readbyqxmd.com/read/29782801/epr-evidence-of-liquid-water-in-ice-an-intrinsic-property-of-water-or-a-self-confinement-effect
#15
Muthulakshmi Thangswamy, Priya Maheshwari, Dhanadeep Dutta, Vinayak G Rane, Pradeep Kumar Pujari
Liquid water (LW) existence in pure ice below 273 K has been a controversial aspect primarily because of the lack of experimental evidences. Recently, electron paramagnetic resonance (EPR) has been used to study deeply supercooled water in a rapidly-frozen polycrystalline ice. The same technique can also be used to probe the presence of LW in polycrystalline ice that has formed through a more conventional, slow cooling one. In this context, the present study aims to emphasize that in case of an external probe involving techniques such as EPR, the results are influenced by the binary phase (BP) diagram of the probe-water system, which also predicts the existence of LW domains in ice, upto the eutectic point...
May 21, 2018: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/29782183/effect-of-cabbage-wraps-on-the-reduction-of-post-traumatic-knee-exudates-in-men
#16
Jacek Dygut, Monika Piwowar, Kinga Fijałkowska, Ibeth Guevara, Robert Jakubas, Gustaw Gonzales, Krzysztof Popławski, Anna Strokowska, Hanna Wikariak, Wiktor Jurkowski
OBJECTIVES: The study investigates measurable effects of cabbage leaf wraps on post-traumatic knee injury exudate absorption in men. DESIGN: Case-control experiment on the same group of patients (before and after treatment). SETTINGS/LOCATION: One academic center and two hospitals. SUBJECTS: The study was carried out on a group of patients with different degrees of injury severity in the acute stage of the knee injury who were divided into three groups based on the width of suprapatellar recess gap (3-5 mm in group 1, 6-10 mm in group 2, and 11 mm or more in group 3) as assessed by ultrasonography...
May 21, 2018: Journal of Alternative and Complementary Medicine: Research on Paradigm, Practice, and Policy
https://www.readbyqxmd.com/read/29781931/ultrasound-assessment-of-ice-ball-formation-by-cryoneurolysis-device-in-an-ex-vivo-model
#17
Adrian Kastler, Hannes Gruber, Elke Gizewski, Alexander Loizides
BACKGROUND AND OBJECTIVES: Real-time ice-ball formation during cryoneurolysis has sparsely been assessed with ultrasound (US). Cryoneurolysis in lower back pain syndrome represents a validated management option in cases of facet joint syndrome. Ultrasound may be a useful tool to perform facet joint cryodenervation. The objective of this study was to assess, ex vivo, the ability of US to assess the ice-ball formation of a cryoneurolysis device. METHODS: Ultrasound assessment of the ice-ball depiction was done using chicken muscle at 22°C in which several freezing cycles were performed with both 2...
May 17, 2018: Regional Anesthesia and Pain Medicine
https://www.readbyqxmd.com/read/29781392/adolescent-athletes-with-learning-disability-display-atypical-maturational-trajectories-on-concussion-baseline-testing-implications-based-on-a-finnish-sample
#18
Kati Peltonen, Matti Vartiainen, Tiina Laitala-Leinonen, Sanna Koskinen, Teemu Luoto, Jon Pertab, Laura Hokkanen
Previous research has reported lower cognitive test scores on baseline testing in athletes reporting multiple previous concussions or a history of learning disability (LD). Age also has an important influence on cognitive performance. While these factors have been considered individually in previous studies, the present study is the first to explore the interaction of age, self-reported LD, and history of concussion on baseline Immediate Post-Concussion Assessment and Cognitive Testing (ImPACT®) in a nationwide study of adolescent athletes...
May 21, 2018: Child Neuropsychology: a Journal on Normal and Abnormal Development in Childhood and Adolescence
https://www.readbyqxmd.com/read/29780979/entropy-connects-water-structure-and-dynamics-in-protein-hydration-layer
#19
Jayangika N Dahanayake, Katie R Mitchell-Koch
The enzyme Candida Antarctica lipase B (CALB) serves here as a model for understanding connections among hydration layer dynamics, solvation shell structure, and protein surface structure. The structure and dynamics of water molecules in the hydration layer were characterized for regions of the CALB surface, divided around each α-helix, β-sheet, and loop structure. Heterogeneous hydration dynamics were observed around the surface of the enzyme, in line with spectroscopic observations of other proteins. Regional differences in the structure of the biomolecular hydration layer were found to be concomitant with variations in dynamics...
May 21, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29780846/epidemiology-of-hip-and-groin-injuries-in-collegiate-athletes-in-the-united-states
#20
Yehuda E Kerbel, Christopher M Smith, John P Prodromo, Michael I Nzeogu, Mary K Mulcahey
Background: Hip and groin pain is a common complaint among athletes. Few studies have examined the epidemiology of hip and groin injuries in collegiate athletes across multiple sports. Purpose: To describe the rates, mechanisms, sex-based differences, and severity of hip/groin injuries across 25 collegiate sports. Study Design: Descriptive epidemiology study. Methods: Data from the 2009-2010 through 2013-2014 academic years were obtained from the National Collegiate Athletic Association Injury Surveillance Program (NCAA ISP)...
May 2018: Orthopaedic Journal of Sports Medicine
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