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https://www.readbyqxmd.com/read/28922211/acute-effects-of-ammonia-inhalants-on-strength-and-power-performance-in-trained-men
#1
Sandro Bartolomei, Federico Nigro, Gubellini Luca, Semprini Gabriele, Simone Ciacci, Jay R Hoffman, Franco Merni
The aim of the present study was to investigate the influence of ammonia inhalants on lower body power and maximal isometric strength in trained men. Twenty experienced resistance trained men (age = 26.7 ± 3.7 y; body weight = 80.59 ± 9.0 kg; body height = 179.5 ± 5.7 cm) were tested for counter movement jump power (CMJP), maximal force and rate of force development (pRFD20) expressed during an isometric mid-thigh pull (IMTP). Assessments were performed using either an ammonia salt inhalants (AI), a placebo (PL) or no inhalants (N)...
September 12, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28918606/kinetic-coupling-of-phosphate-release-force-generation-and-rate-limiting-steps-in-the-cross-bridge-cycle
#2
Robert Stehle, Chiara Tesi
A basic goal in muscle research is to understand how the cyclic ATPase activity of cross-bridges is converted into mechanical force. A direct approach to study the chemo-mechanical coupling between Pi release and the force-generating step is provided by the kinetics of force response induced by a rapid change in [Pi]. Classical studies on fibres using caged-Pi discovered that rapid increases in [Pi] induce fast force decays dependent on final [Pi] whose kinetics were interpreted to probe a fast force-generating step prior to Pi release...
September 16, 2017: Journal of Muscle Research and Cell Motility
https://www.readbyqxmd.com/read/28915733/ab-initio-studies-of-the-diffusion-of-intrinsic-defects-and-silicon-dopants-in-bulk-inas
#3
Mardochee Reveil, Hsien-Lien Huang, Huang-Ta Chen, Jason Liu, Michael O Thompson, Paulette Clancy
We expose the predominant diffusional pathways for In and As in InAs, as well as dopant Si atoms in InAs, using Nudged Elastic Band calculations in conjunction with accurate Density Functional Theory calculations of the energy of defective systems. Our results show that As is a very fast diuser compared to In and Si for both vacancy-assisted and interstitially mediated mechanisms. Larger indium atoms, on the other hand, are very slow diffusers and strongly prefer to remain on the In sublattice. Silicon also prefers to stay in substitutional sites in the In sublattice, in agreement with the fact that Si is used to create n-doped InAs...
September 15, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28912725/enhanced-strength-and-sprint-levels-and-changes-in-blood-parameters-during-a-complete-athletics-season-in-800-m-high-level-athletes
#4
Beatriz Bachero-Mena, Fernando Pareja-Blanco, Juan J González-Badillo
The purpose of this study was to analyze changes in sprint, strength, hematological, and hormonal parameters in high-level 800 m athletes during a complete athletics season. Thirteen male athletes of national and international level in 800 m (personal best ranging from 1:43 to 1:58 min:ss) participated in this study. A total of 5 tests were conducted during a complete athletics season. Athletes performed sprint tests (20 and 200 m), countermovement jump (CMJ), jump squat (JS), and full squat (SQ) tests. Blood samples (red and white blood profile) and hormones were collected in test 1 (T1), test 3 (T3), and test 5 (T5)...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28912650/the-effects-combining-cryocompression-therapy-following-an-acute-bout-of-resistance-exercise-on-performance-and-recovery
#5
William H DuPont, Brek J Meuris, Vincent H Hardesty, Emily C Barnhart, Landon H Tompkins, Morricia J P Golden, Clayton J Usher, Paul A Spence, Lydia K Caldwell, Emily M Post, Matthew K Beeler, William J Kraemer
Compression and cold therapy used separately have shown to reduce negative effects of tissue damage. The combining compression and cold therapy (cryocompression) as a single recovery modality has yet to be fully examined. To examine the effects of cryocompression on recovery following a bout of heavy resistance exercise, recreationally resistance trained men (n =16) were recruited, matched, and randomly assigned to either a cryocompression group (CRC) or control group (CON). Testing was performed before and then immediately after exercise, 60 minutes, 24 hours, and 48 hours after a heavy resistance exercise workout (barbell back squats for 4 sets of 6 reps at 80% 1RM, 90 sec rest between sets, stiff legged deadlifts for 4 sets of 8 reps at 1...
September 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28905711/automated-tracking-of-motion-and-body-weight-for-objective-monitoring-of-rats-in-colony-housing
#6
Christian Brenneis, Andreas Westhof, Jeannine Holschbach, Martin Michaelis, Hans Guehring, Kerstin Kleinschmidt-Doerr
Living together in large social communities within an enriched environment stimulates self-motivated activity in rats. We developed a modular housing system in which a single unit can accommodate as many as 48 rats and contains multiple functional areas. This rat colony cage further allowed us to remotely measure body weight and to continuously measure movement, including jumping and stair walking between areas. Compared with pair-housed, age-, strain-, and weight-matched rats in conventional cages, the colony-housed rats exhibited higher body mass indices, had more exploratory behavior, and were more cooperative during handling...
January 1, 2017: Journal of the American Association for Laboratory Animal Science: JAALAS
https://www.readbyqxmd.com/read/28902120/competition-intensity-and-fatigue-in-elite-fencing
#7
Anthony N Turner, Liam Kilduff, Geoff Marshall, James Phillips, Angelo Noto, Conor Buttigieg, Marcela Gondek, Frank Hills, Lygeri Dimitriou
As yet, no studies have characterised fencing competitions. Therefore in elite male foilists and across two competitions, we investigated their countermovement jump (CMJ) height, testosterone (T), cortisol (C), alpha-amylase (AA), immunoglobulin A (IgA), heart rate (HR), blood lactate (BL) and rating of perceived exertion (RPE). Average (± SD) scores for RPE, BL and HR (average, max and percentage of time ≥ 80% HRmax) were highest in the knockout bouts compared to poules (8.5 ± 1.3 vs. 5.7 ± 1.3, 3.6 ± 1...
September 7, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28902118/concurrent-training-followed-by-detraining-does-the-resistance-training-intensity-matter
#8
António C Sousa, Daniel A Marinho, Maria H Gil, Mikel Izquierdo, David Rodríguez-Rosell, Henrique P Neiva, Mário C Marques
The aim of the present study was to analyze the training and detraining effects of concurrent aerobic training and resistance training against three different external loads on strength and aerobic variables. Thirty-two men were randomly assigned to four groups: low-load (LLG, n=9), moderate-load (MLG, n=9), high-load (HLG, n=8), and control group (CG, n=6). Resistance training consisted of FS with a low-load (40-55% 1RM), a moderate-load (55-70% 1RM) or a high-load (70-85% 1RM) combined with jump and sprint exercises...
September 6, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28902117/factors-influencing-spike-jump-height-in-female-college-volleyball-players
#9
Yusuke Ikeda, Yusuke Sasaki, Shingo Sorimachi, Rena Hamano
The purpose of this study was to examine factors influencing spike jump (SPJ) performance by female competitive volleyball players through comparisons of the kinematic data of SPJ with those of the standing long jump (SLJ) and vertical jump (VJ). Seventeen female competitive volleyball players were asked to perform SPJ, SLJ, and VJ. Motion data of SPJ including the approach phase were recorded. Regarding SLJ and VJ, jumping motion and ground reaction force were recorded during each performance. The results obtained showed that SPJ height correlated with vertical velocity at take-off, horizontal velocity at third step contact, and the deceleration of horizontal velocity from third step contact to take-off...
September 6, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28892693/a-modelling-approach-to-study-the-fouling-of-an-anaerobic-membrane-bioreactor-for-industrial-wastewater-treatment
#10
Amine Charfi, Narumol Thongmak, Boumediene Benyahia, Muhammad Aslam, Jérôme Harmand, Nihel Ben Amar, Geoffroy Lesage, Porntip Sridang, Jeonghwan Kim, Marc Heran
An Anaerobic Membrane BioReactors (AnMBR) model is presented in this paper based on the combination of a simple fouling model and the Anaerobic Model 2b (AM2b) to describe biological and membrane dynamic responses in an AnMBR. In order to enhance the model calibration and validation, Trans-Membrane Pressure (TMP), Total Suspended Solid (TSS), COD, Volatile Fatty Acid (VFA) and methane production were measured. The model shows a satisfactory description of the experimental data with R(2)≈0.9 for TMP data and R(2)≈0...
August 14, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28890790/evaluating-pair-versus-solitary-housing-in-kennelled-domestic-dogs-canis-familiaris-using-behaviour-and-hair-cortisol-a-pilot-study
#11
Emma K Grigg, Belle Marie Nibblett, James Q Robinson, Judit E Smits
Numerous studies conducted to assess welfare of domestic dogs housed in kennel facilities have reported that these dogs experience suboptimal living conditions. One important goal of improving welfare of kennelled dogs is to reduce their stress levels, and one recommended approach for improving welfare of kennelled dogs is group or social housing. The beneficial effects of management changes designed to achieve this goal should be measurable in individual animals. Stress is evident through behaviours exhibited, as well as via the concentration of cortisol, a key hormone reflecting stress...
2017: Veterinary Record Open
https://www.readbyqxmd.com/read/28890688/metastability-of-neuronal-dynamics-during-general-anesthesia-time-for-a-change-in-our-assumptions
#12
Andrew E Hudson
There is strong evidence that anesthetics have stereotypical effects on brain state, so that a given anesthetic appears to have a signature in the electroencephalogram (EEG), which may vary with dose. This can be usefully interpreted as the anesthetic determining an attractor in the phase space of the brain. How brain activity shifts between these attractors in time remains understudied, as most studies implicitly assume a one-to-one relationship between drug dose and attractor features by assuming stationarity over the analysis interval and analyzing data segments of several minutes in length...
2017: Frontiers in Neural Circuits
https://www.readbyqxmd.com/read/28889217/best-dispersal-strategies-in-spatially-heterogeneous-environments-optimization-of-the-principal-eigenvalue-for-indefinite-fractional-neumann-problems
#13
Benedetta Pellacci, Gianmaria Verzini
We study the positive principal eigenvalue of a weighted problem associated with the Neumann spectral fractional Laplacian. This analysis is related to the investigation of the survival threshold in population dynamics. Our main result concerns the optimization of such threshold with respect to the fractional order [Formula: see text], the case [Formula: see text] corresponding to the standard Neumann Laplacian: when the habitat is not too fragmented, the principal positive eigenvalue can not have local minima for [Formula: see text]...
September 9, 2017: Journal of Mathematical Biology
https://www.readbyqxmd.com/read/28885626/evidence-for-a-primate-origin-of-zoonotic-helicobacter-suis-colonizing-domesticated-pigs
#14
Bram Flahou, Mirko Rossi, Jaco Bakker, Jan Am Langermans, Edwin Heuvelman, Jay V Solnick, Miriam E Martin, Jani O'Rourke, Le Duc Ngoan, Nguyen Xuan Hoa, Masahiko Nakamura, Anders Øverby, Hidenori Matsui, Hiroyoshi Ota, Takehisa Matsumoto, Dennis L Foss, Laurice A Kopta, Oladipo Omotosho, Maria Pia Franciosini, Patrizia Casagrande Proietti, Aizhen Guo, Han Liu, Gabriela Borilova, Ana Paula Bracarense, Sara K Lindén, Sofie De Bruyckere, Guangzhi Zhang, Chloë De Witte, Annemieke Smet, Frank Pasmans, Richard Ducatelle, Jukka Corander, Freddy Haesebrouck
Helicobacter suis is the second most prevalent Helicobacter species in the stomach of humans suffering from gastric disease. This bacterium mainly inhabits the stomach of domesticated pigs, in which it causes gastric disease, but it appears to be absent in wild boars. Interestingly, it also colonizes the stomach of asymptomatic rhesus and cynomolgus monkeys. The origin of modern human-, pig- or non-human primate-associated H. suis strains in these respective host populations was hitherto unknown. Here we show that H...
September 8, 2017: ISME Journal
https://www.readbyqxmd.com/read/28883790/impedance-control-for-robotic-rehabilitation-a-robust-markovian-approach
#15
Andres L Jutinico, Jonathan C Jaimes, Felix M Escalante, Juan C Perez-Ibarra, Marco H Terra, Adriano A G Siqueira
The human-robot interaction has played an important role in rehabilitation robotics and impedance control has been used in the regulation of interaction forces between the robot actuator and human limbs. Series elastic actuators (SEAs) have been an efficient solution in the design of this kind of robotic application. Standard implementations of impedance control with SEAs require an internal force control loop for guaranteeing the desired impedance output. However, nonlinearities and uncertainties hamper such a guarantee of an accurate force level in this human-robot interaction...
2017: Frontiers in Neurorobotics
https://www.readbyqxmd.com/read/28880326/fast-flip-flop-of-halogenated-cobalt-bis-dicarbollide-anion-in-a-lipid-bilayer-membrane
#16
Tatyana I Rokitskaya, Irina D Kosenko, Igor B Sivaev, Yuri N Antonenko, Vladimir I Bregadze
Transmembrane translocation (flip-flop) of cobalt bis(dicarbollide) (COSAN) anions, elicited by application of a voltage-jump across the lipid bilayer membrane, manifested itself in monoexponential electrical current transients in the microsecond time scale. Halogenation of COSAN led to multi-fold acceleration of the flip-flop, the effect increasing with the molecular weight of the halogens. The exception was a fluorinated analog which exhibited slowing of the translocation kinetics. Measurements of the fluorescence ratio of the dye di-4-ANEPPS in lipid vesicles showed significant differences in the adsorption of studied hydrophobic anions...
September 7, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28880175/hyper-lapse-from-multiple-spatially-overlapping-videos
#17
Miao Wang, Jun-Bang Liang, Song-Hai Zhang, Shao-Ping Lu, Ariel Shamir, Shi-Min Hu
Hyper-lapse video with high speed-up rate is an efficient way to overview long videos such as a human activity in first-person view. Existing hyper-lapse video creation methods produce a fast-forward video effect using only one video source. In this work, we present a novel hyper-lapse video creation approach based on multiple spatially-overlapping videos. We assume the videos share a common view or location, and find transition points where jumps from one video to another may occur. We represent the collection of videos using a hyper-lapse transition graph; the edges between nodes represent possible hyper-lapse frame transitions...
September 4, 2017: IEEE Transactions on Image Processing: a Publication of the IEEE Signal Processing Society
https://www.readbyqxmd.com/read/28878460/the-effects-of-dance-music-jump-rope-exercise-on-pulmonary-function-and-body-mass-index-after-music-jump-rope-exercise-in-overweight-adults-in-20-s
#18
KyoChul Seo
[Purpose] The purpose of this study was to examine the effect of a dance music jump rope exercise on changes Pulmonary Function and body mass index in female overweight subjects in their 20's. [Subjects and Methods] The subjects were randomly assigned to the dance music jump rope exercise group and the stationary cycle exercise group. All subjects have conducted the exercises three times a week for four weeks. Pulmonary function was evaluated using a spirometer, and body mass index was evaluated using an InBody 3...
August 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28872370/neuromuscular-responses-to-conditioned-soccer-sessions-assessed-via-gps-embedded-accelerometers-insights-into-tactical-periodization
#19
Martin Buchheit, Mathieu Lacome, Yannick Cholley, Ben M Simpson
PURPOSE: To 1) examine the reliability of field-based running-specific measures of neuromuscular function assessed via GPS-embedded accelerometers and 2) examine their responses to three typical conditioned sessions (i.e., Strength, Endurance and Speed) in elite soccer players. METHODS: Before and immediately after each session, vertical jump (CMJ) and adductors squeeze strength (Groin) performances were recorded. Players also performed a 4-min run at 12 km/h followed by 4 ~60-m runs (run =12 s, r =33 s)...
September 5, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28871900/effects-of-a-modified-ballet-class-on-strength-and-jumping-ability-in-college-ballet-dancers
#20
Aikaterini Tsanaka, Vasiliki Manou, Spiros Kellis
The ability to jump high with precision is an important component of the ballet dancer's technique. The aim of this study was to evaluate the effect of a modified ballet class on strength and jumping ability in high level female dancers. Seventeen female ballet students were divided into two groups, experimental and control, and tested before and after an 8-week, 2 times/week intervention for peak torque of knee extensors and flexors at 60°and 180°, and jumping ability (squat jump, countermovement jump, countermovement with arm swing jump, sauté in first position, and sauté in first position with port de bras)...
September 15, 2017: Journal of Dance Medicine & Science
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