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https://www.readbyqxmd.com/read/28645788/effects-of-acute-altered-gravity-during-parabolic-flight-and-or-vestibular-loss-on-cell-proliferation-in-the-rat-dentate-gyrus
#1
Yiwen Zheng, Catherine M Gliddon, Phillip Aitken, Lucy Stiles, Marie-Laure Machado, Bruno Philoxene, Pierre Denise, Paul F Smith, Stephane Besnard
Both parabolic flight, i.e. a condition of altered gravity, and loss of vestibular function, have been suggested to affect spatial learning and memory, which is known to be influenced by neurogenesis in the hippocampus. In this study we investigated whether short alternated micro- and hyper-gravity stimulations during parabolic flight and/or loss of vestibular function, would alter cell proliferation in the hippocampal dentate gyrus of rats, by measuring the number of bromodeoxyuridine (BrdU)-incorporated cells...
June 20, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28642052/impact-of-planetary-ball-mills-on-corn-stover-characteristics-and-enzymatic-digestibility-depending-on-grinding-ball-properties
#2
Jin Hyung Lee, Jeong Heo Kwon, Tae Hyun Kim, Won Il Choi
The impact of planetary mill pretreatment on corn stover size, crystallinity, and enzyme digestibility was investigated based on the grinding ball properties in an effort to reduce energy consumption. Alumina, zirconia, and steel balls were used, of which steel balls had the highest specific gravity but the lowest surface roughness while alumina balls had the lowest specific gravity and the highest roughness. The planetary mill pretreatment effectively reduced the size and crystallinity of the corn stover for all the ball types...
June 12, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28641686/a-case-study-of-human-roll-tilt-perception-in-hypogravity
#3
Torin K Clark, Laurence R Young
BACKGROUND: Increased gravito-inertial acceleration, or hypergravity, such as produced in a centrifuge or in an aircraft coordinated turn, causes humans to systematically overestimate their roll tilt in the dark. This is known as the "G-excess" illusion. We have previously modified a mathematical observer model of dynamic orientation perception to replicate these illusory tilt perceptions. This modified model also made a novel, previously untested, prediction that humans would underestimate acute roll tilt in reduced gravitational environments (hypogravity)...
July 1, 2017: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/28641266/an-approach-to-identifying-phenomena-accompanying-micro-and-nanoparticles-in-contact-with-irregular-vessel-walls
#4
K Talaska, A Ferreira
OBJECTIVE: The objective of this manuscript is to present the method for determining the nature and values of the forces needed to set micro and nanoparticles sitting immobile at the blood vessel wall in motion. METHODS: The problem was tackled in two ways. Microparticles were examined as objects coming into contact with the wall with the actual large arteriole-type vessel structure. The forces acting on microparticles 10 μm, 30 μm and 50 μm in diameter were determined: drag force FD, lift force FL, electrostatic force FE and gravity force FG...
June 19, 2017: IEEE Transactions on Nanobioscience
https://www.readbyqxmd.com/read/28638101/naked-singularity-firewall-and-hawking-radiation
#5
Hongsheng Zhang
Spacetime singularity has always been of interest since the proof of the Penrose-Hawking singularity theorem. Naked singularity naturally emerges from reasonable initial conditions in the collapsing process. A recent interesting approach in black hole information problem implies that we need a firewall to break the surplus entanglements among the Hawking photons. Classically, the firewall becomes a naked singularity. We find some vacuum analytical solutions in R (n) -gravity of the firewall-type and use these solutions as concrete models to study the naked singularities...
June 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28634399/terrestrial-water-load-and-groundwater-fluctuation-in-the-bengal-basin
#6
W G Burgess, M Shamsudduha, R G Taylor, A Zahid, K M Ahmed, A Mukherjee, D J Lapworth, V F Bense
Groundwater-level fluctuations represent hydraulic responses to changes in groundwater storage due to aquifer recharge and drainage as well as to changes in stress that include water mass loading and unloading above the aquifer surface. The latter 'poroelastic' response of confined aquifers is a well-established phenomenon which has been demonstrated in diverse hydrogeological environments but is frequently ignored in assessments of groundwater resources. Here we present high-frequency groundwater measurements over a twelve-month period from the tropical, fluvio-deltaic Bengal Aquifer System (BAS), the largest aquifer in south Asia...
June 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28634369/forecasting-effusive-dynamics-and-decompression-rates-by-magmastatic-model-at-open-vent-volcanoes
#7
Maurizio Ripepe, Marco Pistolesi, Diego Coppola, Dario Delle Donne, Riccardo Genco, Giorgio Lacanna, Marco Laiolo, Emanuele Marchetti, Giacomo Ulivieri, Sébastien Valade
Effusive eruptions at open-conduit volcanoes are interpreted as reactions to a disequilibrium induced by the increase in magma supply. By comparing four of the most recent effusive eruptions at Stromboli volcano (Italy), we show how the volumes of lava discharged during each eruption are linearly correlated to the topographic positions of the effusive vents. This correlation cannot be explained by an excess of pressure within a deep magma chamber and raises questions about the actual contributions of deep magma dynamics...
June 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28633800/two-view-gravity-stress-imaging-protocol-for-nondisplaced-type-ii-supination-external-rotation-ankle-fractures-introducing-the%C3%A2-gravity%C3%A2-stress-cross-table-lateral-view
#8
Troy J Boffeli, Rachel C Collier, Samuel J Gervais
Assessing ankle stability in nondisplaced Lauge-Hansen supination external rotation type II injuries requires stress imaging. Gravity stress mortise imaging is routinely used as an alternative to manual stress imaging to assess deltoid integrity with the goal of differentiating type II from type IV injuries in cases without a posterior or medial fracture. A type II injury with a nondisplaced fibula fracture is typically treated with cast immobilization, and a type IV injury is considered unstable and often requires operative repair...
July 2017: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/28632499/model-based-sphere-localization-mbsl-in-x-ray-projections
#9
Stefan Sawall, Joscha Maier, Carsten Leinweber, David Prox, Carsten Funck, Jan Kuntz, Marc Kachelriess
The detection of spherical markers in x-ray projections is an important task in a variety of applications, e.g. geometric calibration and detector distortion correction. Therein, the projection of the sphere center on the detector is of particular interest as the used spherical beads are no ideal point-like objects. Only few methods have been proposed to estimate this respective position on the detector with sufficient accuracy and surrogate positions, e.g. the center of gravity, are used, impairing the results of subsequent algorithms...
June 20, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28632045/comparison-of-crossover-and-jab-step-start-techniques-for-base-stealing-in-baseball
#10
Tomohisa Miyanishi, So Endo, Ryu Nagahara
Base stealing is an important tactic for increasing the chance of scoring in baseball. This study aimed to compare the crossover step (CS) and jab step (JS) starts for base stealing start performance and to clarify the differences between CS and JS starts in terms of three-dimensional lower extremity joint kinetics. Twelve male baseball players performed CS and JS starts, during which their motion and the force they applied to the ground were simultaneously recorded using a motion-capture system and two force platforms...
February 24, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/28630631/urinalysis-and-clinical-correlations-in-patients-with-p-vivax-or-p-falciparum-malaria-from-colombia
#11
Alberto Tobón-Castaño, Sebastián Barrera Escobar, Cecilia Giraldo Castro
BACKGROUND: Urinalysis is a poorly reviewed diagnostic tool in malaria patients; its application can show the presence of severe malaria. METHODS: Urinalysis was performed in a total of 620 patients diagnosed with malaria by thick blood smear; complications were classified according to WHO major criteria for severity and minor criteria according to the Colombian malaria guideline. RESULTS: Severe or moderate clinical complications were diagnosed in 31...
2017: Journal of Tropical Medicine
https://www.readbyqxmd.com/read/28629106/tannin-extraction-pretreatment-and-very-high-gravity-fermentation-of-acorn-starch-for-bioethanol-production
#12
Bin Chao, Ruiliang Liu, Xueling Zhang, Xu Zhang, Tianwei Tan
The bioethanol production from a novel non-grain feedstock, acorn starch, was studied in this work. The inhibition of tannin in strain growth was investigated, and the effect of tannin was negligible when the tannin concentration was lower than 1g/L in medium. Therefore, the extraction of tannin was performed using 40% (v/v) ethanol-water solution as the solvent for three times under the conditions of solid/liquid ratio 1:20, 60°C, 3h, by which more than 80% of tannin in acorn was extracted and the content of tannin in acorn decreased from 7...
June 8, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28628006/live-tracking-of-moving-samples-in-confocal-microscopy-for-vertically-grown-roots
#13
Daniel von Wangenheim, Robert Hauschild, Matyáš Fendrych, Vanessa Barone, Eva Benková, Jiří Friml
Roots navigate through soil integrating environmental signals to orient their growth. The Arabidopsis root is a widely used model for developmental, physiological and cell biological studies. Live imaging greatly aids these efforts, but the horizontal sample position and continuous root tip displacement present significant difficulties. Here, we develop a confocal microscope setup for vertical sample mounting and integrated directional illumination. We present TipTracker - a custom software for automatic tracking of diverse moving objects usable on various microscope setups...
June 19, 2017: ELife
https://www.readbyqxmd.com/read/28626305/inter-rater-and-intra-rater-reliability-of-the-fluid-goniometer-for-measuring-active-knee-flexion-in-painful-knees-correlations-do-not-mean-agreement
#14
Wilton Remigio, Nancy Tsai, Leonivic Layos, Michelle Chavez
[Purpose] The fluid goniometer is an instrument for measuring range of motion. Reliability of the fluid goniometer has not been established for subjects with painful knee joints. The purpose of this study was to determine the inter-rater and intra-rater reliability of the fluid goniometer in measuring active knee flexion of painful knees and to test its agreement with the gold standard ruler goniometer. [Subjects and Methods] Twenty-five individuals with either unilateral or bilateral painful knees participated in the study...
June 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28625033/hydration-status-of-pregnant-women-in-west-jakarta
#15
Erry Yudhya Mulyani, Hardinsyah, Dodik Briawan, Budi Iman Santoso
BACKGROUND AND OBJECTIVES: During pregnancy, the body exhibits dynamic changes in fluid composition. More than 50%of women experience nausea and vomiting during the first trimester. Studies of hydration status in pregnant women are limited, and not in tropical countries, like in Indonesia. The objective of this study was to investigate the hydration status and appropriate biomarkers for determination of hydration status in pregnant women in West Jakarta. METHODS AND STUDY DESIGN: This study was cross-sectional...
June 2017: Asia Pacific Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28624636/water-geochemistry-of-shallow-lakes-from-the-southeastern-pampa-plain-argentina-and-their-implications-on-mollusk-shells-preservation
#16
Paula A Cristini, Eleonor Tietze, Claudio G De Francesco, Daniel E Martínez
A seasonal sampling of sediments, column and interstitial water for physico-chemical analysis were performed in littoral and open water areas in three freshwater shallow lakes (Nahuel Rucá, Las Mostazas and Los Carpinchos) from Southeastern Pampa plain, Argentina. The main objective of the present study is to evaluate how the characteristics of the depositional environments could be affecting mollusk shell preservation. These lakes are very shallow (2m) and are characterized by an extensive littoral area, dominated by the emergent macrophyte Schoenoplectus californicus, which forms a complete ring around the lake, and an open water area, in general free of vegetation...
June 15, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28622787/monitoring-of-the-newborn-dog-and-prediction-of-neonatal-mortality
#17
Hanna Mila, Aurélien Grellet, Marine Delebarre, Claire Mariani, Alexandre Feugier, Sylvie Chastant-Maillard
Despite the high neonatal mortality rate in puppies, pertinent criteria for health evaluation of the newborns are not defined. This study was thus designed to measure and to characterize factors of variation of six health parameters in dog neonates, and to evaluate their value as predictors of neonatal mortality. A total of 347 purebred puppies under identical conditions of housing and management were examined within the first 8h after birth and then at Day 1. The first health evaluation included Apgar score, weight, blood glucose, lactate and β-hydroxybutyrate concentration, rectal temperature and urine specific gravity (SG)...
August 1, 2017: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/28621995/two-and-three-dimensional-probes-of-parity-in-primordial-gravity-waves
#18
Kiyoshi Wesley Masui, Ue-Li Pen, Neil Turok
We show that three-dimensional information is critical to discerning the effects of parity violation in the primordial gravity-wave background. If present, helical gravity waves induce parity-violating correlations in the cosmic microwave background (CMB) between parity-odd polarization B modes and parity-even temperature anisotropies (T) or polarization E modes. Unfortunately, EB correlations are much weaker than would be naively expected, which we show is due to an approximate symmetry resulting from the two-dimensional nature of the CMB...
June 2, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28620249/comparison-of-surti-goat-milk-with-cow-and-buffalo-milk-for-physicochemical-characteristics-selected-processing-related-parameters-and-activity-of-selected-enzymes
#19
Darshna B Prajapati, Dharti B Kapadiya, Amit Kumar Jain, Bhavbhuti M Mehta, Vijaykumar B Darji, Kishorkumar D Aparnathi
AIM: The study was undertaken to find out the physicochemical characteristics, selected processing-related parameters and activity of selected enzymes in Surti goat milk. MATERIALS AND METHODS: Milk samples from Surti goats and buffalo milk samples were collected during the period from July 2013 to January 2014 at Reproductive Biology Research Unit, Anand Agricultural University (AAU), Anand. Milk samples from Kankrej cows were collected from Livestock Research Station, AAU, Anand...
May 2017: Veterinary World
https://www.readbyqxmd.com/read/28618830/acoustic-levitation-of-an-object-larger-than-the-acoustic-wavelength
#20
Marco A B Andrade, Fábio T A Okina, Anne L Bernassau, Julio C Adamowski
Levitation and manipulation of objects by sound waves have a wide range of applications in chemistry, biology, material sciences, and engineering. However, the current acoustic levitation techniques are mainly restricted to particles that are much smaller than the acoustic wavelength. In this work, it is shown that acoustic standing waves can be employed to stably levitate an object much larger than the acoustic wavelength in air. The levitation of a large slightly curved object weighting 2.3 g is demonstrated by using a device formed by two 25 kHz ultrasonic Langevin transducers connected to an aluminum plate...
June 2017: Journal of the Acoustical Society of America
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