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https://www.readbyqxmd.com/read/29048171/afm-colloidal-probe-measurements-implicate-capillary-condensation-in-punch-particle-surface-interactions-during-tableting
#1
Maria Badal Tejedor, Niklas Nordgren, Michael Schuleit, Anna Millqvist-Fureby, Mark W Rutland
Adhesion of the powders to the punches is a common issue during tableting. This phenomenon is known as sticking and affects the quality of the manufactured tablets. Defective tablets increase the cost of the manufacturing process. Thus the ability to predict the tableting performance of the formulation blend before the process is scaled-up is important. The adhesive propensity of the powder to the tableting tools is mostly governed by the surface-surface adhesive interactions. AFM colloid probe is a surface characterization technique that allows measurement of the adhesive interactions between two materials of interest...
October 19, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29047485/terahertz-bistability-and-multistability-in-graphene-dielectric-fibonacci-multilayer
#2
Hadiseh Nasari, Mohammad Sadegh Abrishamian
Here, we benefit from the strong nonlinear response of graphene and the rich variety of resonances provided by a graphene/dielectric Fibonacci multilayer to realize bistability and multistability in the terahertz (THz) frequency range. Toward this pursuit, we employ the nonlinear transfer matrix method. We examine the suitability of resonances in the Fibonacci multilayer for the bi/multistability purposes and determine the proper working point. We report various switching up/down manners via single or stepwise jumps between states of the same or different contrasts upon increasing followed by decreasing the intensity of the incident wave...
July 1, 2017: Applied Optics
https://www.readbyqxmd.com/read/29045411/mating-induced-sexual-inhibition-in-the-jumping-spider-servaea-incana-araneae-salticidae-a-fast-acting-and-long-lasting-effect
#3
Vivian Mendez, Rowan H McGinley, Phillip W Taylor
Mating-induced sexual inhibition has been studied extensively as an important facet of many insect mating systems but remains little understood in spiders. Once mated, females of many spider species become unreceptive and aggressive toward males, but the speed of onset and persistence of this effect are not known. Addressing this gap, the present study considers (1) mating tendency of virgins, latency to remating, and lifetime mating frequency and (2) how quickly sexual inhibition is expressed after the first mating in female Servaea incana jumping spiders...
2017: PloS One
https://www.readbyqxmd.com/read/29043110/neurodynamic-mobilization-and-foam-rolling-improved-delayed-onset-muscle-soreness-in-a-healthy-adult-population-a-randomized-controlled-clinical-trial
#4
Blanca Romero-Moraleda, Roy La Touche, Sergio Lerma-Lara, Raúl Ferrer-Peña, Víctor Paredes, Ana Belén Peinado, Daniel Muñoz-García
OBJECTIVES: Compare the immediate effects of a Neurodynamic Mobilization (NM) treatment or foam roller (FR) treatment after DOMS. DESIGN: Double blind randomised clinical trial. SETTING: The participants performed 100 drop jumps (5 sets of 20 repetitions, separated by 2 min rests) from a 0.5-m high box in a University biomechanics laboratory to induce muscle soreness. The participants were randomly assigned in a counter-balanced fashion to either a FR or NM treatment group...
2017: PeerJ
https://www.readbyqxmd.com/read/29042214/synthetic-cannabinoid-am2201-induces-seizures-involvement-of-cannabinoid-cb1-receptors-and-glutamatergic-transmission
#5
Masahiko Funada, Mika Takebayashi-Ohsawa
Abuse of synthetic cannabinoids is a serious social problem worldwide. Intentional ingestion of synthetic cannabinoids can cause severe toxicity, including seizures. Here we investigated the effects of acute administration of synthetic cannabinoids on the induction of epileptic seizures by monitoring electroencephalographic activity in freely moving mice. The synthetic cannabinoid, AM2201, induced abnormal, high-amplitude (>2-fold baseline amplitude), sharp-wave activity. The abnormal spike-wave discharges were accompanied by epileptiform behavior: rigid posture, tail extension, rearing with forepaws extended, jumping, and intermittent tonic-clonic jerking movements...
October 14, 2017: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/29042090/the-natural-history-of-flail-chest-injuries
#6
Kamil Naidoo, Layth Hanbali, Peter Bates
PURPOSE: Flail chest (FC) injuries represent a significant burden on trauma services because of its high morbidity and mortality. Current gold standard conservative management strategies for FC, are now being challenged by renewed interest in surgical rib fixation. This retrospective epidemiological study sets out to evaluate FC patients, and quantify the natural history of this injury by studying the injury patterns, epidemiology and mortality of patients sustaining FC injuries admitted to a major trauma centre (MTC)...
September 19, 2017: Chinese Journal of Traumatology, Zhonghua Chuang Shang za Zhi
https://www.readbyqxmd.com/read/29039261/one-year-follow-up-of-the-capo-kids-trial-are-physical-benefits-maintained
#7
Rossana C Nogueira, Benjamin K Weeks, Belinda Beck
PURPOSE: To determine the 12-month maintenance of a 9-month, thrice-weekly, 10-minute high-intensity exercise program, delivered in schools, on bone and other health-related performance variables in prepubertal children. METHODS: All participants (N = 311) of the CAPO kids trial (testing times T1-T2) were contacted to undergo retesting (T3) of all original measures-including weight, standing and sitting height, calcaneal broadband ultrasound attenuation (Achilles, GE), and stiffness index (Achilles, GE)-waist circumference, resting heart rate, blood pressure, vertical jump, and aerobic capacity...
October 17, 2017: Pediatric Exercise Science
https://www.readbyqxmd.com/read/29035984/risk-factors-for-lower-extremity-injuries-among-contemporary-dance-students
#8
Christine van Seters, Rogier M van Rijn, Marienke van Middelkoop, Janine H Stubbe
OBJECTIVE: To determine whether student characteristics, lower-extremity kinematics, and strength are risk factors for sustaining lower-extremity injuries in preprofessional contemporary dancers. DESIGN: Prospective cohort study. SETTING: Codarts University of the Arts. PATIENTS: Forty-five first-year students of Bachelor Dance and Bachelor Dance Teacher. ASSESSMENT OF RISK FACTORS: At the beginning of the academic year, the injury history (only lower-extremity) and student characteristics (age, sex, educational program) were assessed using a questionnaire...
October 10, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/29035596/the-elevated-track-in-pole-vault-an-advantage-during-run-up
#9
Johan Cassirame, Hervé Sanchez, Jean Benoit Morin
Approach speed is a major determinant of pole-vault performance. Athletic jump events such as long jump, triple jump and pole vault can utilise an elevated track for the runway. Feedback from athletes indicates a benefit of using an elevated track on their results. However, there is no evidence that elevated tracks do increase athletes' performance. PURPOSE: The aim of this study is to investigate the potential advantage of using an elevated track during elite pole-vault competitions on run-up speed parameters...
October 16, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29035595/the-influence-of-physical-qualities-on-activity-profiles-of-female-australian-football-match-play
#10
Georgia M Black, Tim J Gabbett, Rich D Johnston, Michael H Cole, Geraldine Naughton, Brian Dawson
PURPOSE: The rapid transition of female Australian football players from amateur to semi-elite competitions has the potential for athletes to be underprepared for match-play. To gain an understanding the match demands of female football, the aims of this study were three-fold: (1) to highlight the physical qualities that discriminate selected and non-selected female Australian Football players, (2) to investigate activity profiles of female Australian Football players, and (3) to gain an understanding of the influence of physical qualities on running performance in female Australian Football match-play...
October 16, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29035546/the-gradient-adaptive-decomposition-grad-method-optimized-refinement-along-macrostate-borders-in-markov-state-models
#11
Pablo G Romano, Marina Giuseppina Guenza
Markov State Models (MSM) are used to model the kinetics of processes sampled by Molecular Dynamics (MD) simulations. MSM reduce the high dimensionality inherent to MD simulations as they partition the free energy landscape into discrete states, generating a kinetic model as a series of uncorrelated jumps between states. Here, we detail a new method, called GRadient Adaptive Decomposition, which optimizes coarse-grained MSM by refining borders with respect to the gradient along the free energy surface. The proposed method requires only a small number of initial microstates because it corrects for errors produced by limited sampling...
October 16, 2017: Journal of Chemical Information and Modeling
https://www.readbyqxmd.com/read/29035502/binding-mechanism-of-model-charged-dye-carboxyfluorescein-to-hyaluronan-polylysine-multilayers
#12
Vladimir Z Prokopovic, Anna S Vikulina, David Sustr, Elena M Shchukina, Dmitry G Shchukin, Dmitry V Volodkin
Biopolymer-based multilayers become more and more attractive due to the vast span of biological application they can be used for, e.g. implant coatings, cell culture supports, scaffolds. Multilayers have demonstrated superior capability to store enormous amount of small charged molecules such as drugs and release them in a controlled manner, however, the binding mechanism for drug loading into the multilayers is still poorly understood. Here we focus on this mechanism using model hyaluronan/polylysine (HA/PLL) multilayers and a model charged dye carboxyfluorescein (CF)...
October 16, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29031331/comparing-subjective-and-objective-evaluation-of-show-jumping-competition-and-warm-up-arena-surfaces
#13
E Hernlund, A Egenvall, S J Hobbs, M L Peterson, A J Northrop, A Bergh, J H Martin, L Roepstorff
The development of safety and quality standards for equestrian surfaces needs to be based on objective, repeatable measurements which allow comparisons between surfaces. These measurements should incorporate the assessment of surface performance by riders. This study provides data from objective and subjective assessment of functional properties of high-level show jumping competition and warm-up arenas. Twenty-five arenas in nine international show jumping events were evaluated by mechanical in-situ testing with a surface tester, rider assessments using visual analogue scales (198 riders provided 749 arena evaluations), descriptions of arena constructions and by laboratory tests of surface material...
September 2017: Veterinary Journal
https://www.readbyqxmd.com/read/29030644/how-to-prevent-the-detrimental-effects-of-two-months-of-bed-rest-on-muscle-bone-and-cardiovascular-system-an-rct
#14
Andreas Kramer, Albert Gollhofer, Gabriele Armbrecht, Dieter Felsenberg, Markus Gruber
Physical inactivity leads to a deconditioning of the skeletal, neuromuscular and cardiovascular system. It can lead to impaired quality of life, loss of autonomy, falls and fractures. Regular exercise would be a logical remedy, but the generally recommended high-volume endurance and strength training programs require a lot of time and equipment. In this randomized controlled study with 23 healthy participants, we established that a short, intensive jump training program can prevent the large musculoskeletal and cardiovascular deconditioning effects caused by two months of physical inactivity during bed rest, particularly the loss of bone mineral mass and density, lean muscle mass, maximal leg strength and peak oxygen uptake...
October 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29030546/spontaneous-jumping-bouncing-and-trampolining-of-hydrogel-drops-on-a-heated-plate
#15
Jonathan T Pham, Maxime Paven, Sanghyuk Wooh, Tadashi Kajiya, Hans-Jürgen Butt, Doris Vollmer
The contact between liquid drops and hot solid surfaces is of practical importance for industrial processes, such as thermal spraying and spray cooling. The contact and bouncing of solid spheres is also an important event encountered in ball milling, powder processing, and everyday activities, such as ball sports. Using high speed video microscopy, we demonstrate that hydrogel drops, initially at rest on a surface, spontaneously jump upon rapid heating and continue to bounce with increasing amplitudes. Jumping is governed by the surface wettability, surface temperature, hydrogel elasticity, and adhesion...
October 13, 2017: Nature Communications
https://www.readbyqxmd.com/read/29029725/bluetongue-virus-from-btv-1-to-btv-27
#16
Guillaume Belbis, Stéphan Zientara, Emmanuel Bréard, Corinne Sailleau, Grégory Caignard, Damien Vitour, Houssam Attoui
Bluetongue virus (BTV) is the type species of genus Orbivirus within family Reoviridae. Bluetongue virus is transmitted between its ruminant hosts by the bite of Culicoides spp. midges. Severe BT cases are characterized by symptoms including hemorrhagic fever, particularly in sheep, loss of productivity, and death. To date, 27 BTV serotypes have been documented. These include novel isolates of atypical BTV, which have been almost fully characterized using deep sequencing technologies and do not rely on Culicoides vectors for their transmission among hosts...
2017: Advances in Virus Research
https://www.readbyqxmd.com/read/29023199/responses-of-low-and-high-compression-during-recovery-after-repeated-sprint-training-in-well-trained-handball-players
#17
Christoph Zinner, Maximilian Pelka, Alexander Ferrauti, Tim Meyer, Mark Pfeiffer, Billy Sperlich
The aim of the study was to investigate the effects of wearing various levels of compression following repeated and exhausting sprint exercise on variables related to recovery. Twelve well-trained handball players performed three sessions of repeated and exhausting sprint exercise (30 × 30m). Directly after each session the participants wore tights extending from below the hip to the foot with either 0, 10, or 25 mm Hg of compression onto the thigh and calf muscles. 48 h after the training session all participants performed 5 × 30m sprints and counter movement jumps...
October 12, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/29018542/spatiotemporal-characteristics-of-motor-actions-by-blind-long-jump-athletes
#18
Miguel Angel Torralba, José María Padullés, Jose Luis Losada, Jose Luis López
BACKGROUND: Blind people depend on spatial and temporal representations to perform activities of daily living and compete in sport. OBJECTIVE: The aim of this study is to determine the spatiotemporal characteristics of long jumps performed by blind athletes and compare findings with those reported for sighted athletes. METHODS: We analysed a sample of 12 male athletes competing in the F11 Long Jump Finals at the Paralympic Games in London 2012...
2017: BMJ Open Sport & Exercise Medicine
https://www.readbyqxmd.com/read/29018362/effects-of-unloaded-vs-loaded-plyometrics-on-speed-and-power-performance-of-elite-young-soccer-players
#19
Ronaldo Kobal, Lucas A Pereira, Vinicius Zanetti, Rodrigo Ramirez-Campillo, Irineu Loturco
The purpose of this study was to investigate the effects of loaded and unloaded plyometric training strategies on speed and power performance of elite young soccer players. Twenty-three under-17 male soccer players (age: 15.9 ± 1.2 years, height: 178.3 ± 8.1 cm, body-mass (BM): 68.1 ± 9.3 kg) from the same club took part in this study. The athletes were pair-matched in two training groups: loaded vertical and horizontal jumps using an haltere type handheld with a load of 8% of the athletes' body mass (LJ; n = 12) and unloaded vertical and horizontal plyometrics (UJ; n = 11)...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/29016479/the-effects-of-foam-rolling-as-a-recovery-tool-in-professional-soccer-players
#20
Ezequiel Rey, Alexis Padrón-Cabo, Pablo B Costa, Roberto Barcala-Furelos
Foam rolling (FR) is a common strategy used after training and competition by players. However, no previous studies have assessed the effectiveness of FR as recovery tool in sports populations. The aim of this study was to examine the effectiveness of FR (20 minutes of foam rolling exercises on quadriceps, hamstrings, adductors, gluteals, and gastrocnemius) and passive recovery (20 minutes sit on a bench) interventions performed immediately after a training session on Total Quality Recovery (TQR), perceived muscle soreness, jump performance, agility, sprint, and flexibility 24 hours after the training...
October 7, 2017: Journal of Strength and Conditioning Research
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