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Balance force

Irena Branyikova, Monika Filipenska, Katerina Urbanova, Marek C Ruzicka, Martin Pivokonsky, Tomas Branyik
Alkaline flocculation has been studied due to its potential as a low-cost harvesting method for microalgae. However, surface properties (zeta potential, contact angles) as inputs into physicochemical interaction models have not yet been applied systematically. In this work, forced alkaline flocculation of the freshwater microalgae Chlorella vulgaris induced by calcium phosphate precipitates was studied as a model system. Response surface methodology was used to quantify the effect of independent variables (concentration of Ca2+ (0...
March 6, 2018: Colloids and Surfaces. B, Biointerfaces
Lin Lei, Dylan A Kovacevich, Michael P Nitzsche, Jihyun Ryu, Kutaiba Al-Marzoki, Gabriela Rodriguez, Lisa Klein, Andrei Jitianu, Jonathan P Singer
The electrospray process utilizes the balance of electrostatic forces and surface tension within a charged spray to produce charged microdroplets with a narrow dispersion in size. In electrospray deposition, each droplet carries a small quantity of suspended material to a target substrate. Past electrospray deposition results fall into two major categories: (1) continuous spray of films onto conducting substrates and (2) spray of isolated droplets onto insulating substrates. A cross-over regime, or a self-limited spray, has only been limitedly observed in the spray of insulating materials onto conductive substrates...
March 15, 2018: ACS Applied Materials & Interfaces
Joshua L Haworth, Adam J Strang, Mathias Hieronymus, Mark S Walsh
BACKGROUND AND AIM: Many people use balance training as a rehabilitation or habilitation modality. Although the time course of changes to temporal and spatial aspects of postural sway over the initial weeks of such training is as yet unclear. Particularly, we sought to explore the effects of training on sway during a dynamic task of stance on an ultra-compliant surface. Such a task provides different mechanical, and thus sensorimotor, constraints compared to stance on a solid surface...
March 15, 2018: Somatosensory & Motor Research
Doreen Huppert, Dominik Straumann, Mans Magnusson, Ilmari Pyykkö, Thomas Brandt
A common European Community driving licence was established in 1980. However, there are major differences among the countries as regards medical conditions that legally affect driving ability. This article discusses various assessment guidelines for dizzy patients. These range from a total absence of specified binding requirements in Finland or regulations open to clinical interpretation in Switzerland, to inappropriately strict regulations in Germany. We focus on requirements for patients with vestibular disorders in Germany which have been in force since 2014...
March 13, 2018: Journal of Neurology
Diego Hojsgaard
Polyploid genomes evolve and follow a series of dynamic transfigurations along with adaptation and speciation. The initial formation of a new polyploid individual within a diploid population usually involves a triploid bridge, a two-step mechanism of cell fusions between ubiquitous (reduced) and rare (unreduced) gametes. The primary fusion event creates an intermediate triploid individual with unbalanced genome sets, a situation of genomic-shock characterized by gene expression dysregulation, high dosage sensitivity, disturbed cell divisions, and physiological and reproductive attributes drastically altered...
2018: Frontiers in Plant Science
Santiago Martinez, Juan Miguel Garcia-Haro, Juan G Victores, Alberto Jardon, Carlos Balaguer
The computational complexity of humanoid robot balance control is reduced through the application of simplified kinematics and dynamics models. However, these simplifications lead to the introduction of errors that add to other inherent electro-mechanic inaccuracies and affect the robotic system. Linear control systems deal with these inaccuracies if they operate around a specific working point but are less precise if they do not. This work presents a model improvement based on the Linear Inverted Pendulum Model (LIPM) to be applied in a non-linear control system...
March 11, 2018: Sensors
Rachel Bennett, Philippa Waterhouse
Understanding the transition to adulthood has important implications for supporting young adults and understanding the roots of diversity in wellbeing later in life. In South Africa, the end of Apartheid means today's youth are experiencing their transition to adulthood in a changed social and political context which offers opportunities compared to the past but also threats. This paper presents the first national level analysis of the patterning of key transitions (completion of education, entry into the labour force, motherhood and marriage or cohabitation), and the association between the different pathways and health amongst young women...
March 2, 2018: Social Science & Medicine
Michael Wilkinson, Alistair Ewen, Nicholas Caplan, David O'Leary, Neil Smith, Richard Stoneham, Lee Saxby
The effect of textured insoles on kinetics and kinematics of overground running was assessed. 16 male injury-free-recreational runners attended a single visit (age 23 ± 5 yrs; stature 1.78 ± 0.06 m; mass 72.6 ± 9.2 kg). Overground 15-m runs were completed in flat, canvas plimsolls both with and without textured insoles at self-selected velocity on an indoor track in an order that was balanced among participants. Average vertical loading rate and peak vertical force (Fpeak ) were captured by force platforms...
March 12, 2018: European Journal of Sport Science
Manndy Nget, Kasorn Muijeen
Background: ASEAN integration aims to transform the GMS into a single market with free flows of products, services, and skilled labor, as well as investment openness, which will ultimately force regional economic growth. Therefore, this integration is likely to bring about a big change to this area in the new era; it can subsequently cause many problems as well, including mental health issues of the people in this region. The characteristic differences among the GMS member countries in terms of trade and investment, so-cial and cultural values, medical information and technology, and the living and working environment have become major problems affecting mental health disorders, which are usually identified as depression, stress, and substance abuse...
December 2017: Current Psychiatry Reviews
Ji-Hyun Lee, Hyo-Jung Jeong, Heon-Seock Cynn, Tae-Woo Kang
BACKGROUND AND OBJECTIVES: Normal dorsiflexion (DF) required for normal gait is achieved through balance of the tibialis anterior (TA) and extensor hallucis longus (EHL). Imbalance may induce ankle and foot deformities and exacerbate pathology. EHL dominance is associated with progressive TA weakness, attributable to muscle non-use. When the EHL dominantly dorsiflexes the ankle, the big toe extends at the metatarsophalangeal joint (MTPJ) and pure ankle DF is absent. The effects of active MTPJ flexion on TA and EHL muscles, TA/EHL ratio, and the force applied during active DF in EHL-dominant (EHL-D) and EHL-non-dominant (EHL-ND) subjects were compared...
March 2, 2018: Journal of Back and Musculoskeletal Rehabilitation
J K Dierijck, A D Wright, J D Smirl, K Bryk, P van Donkelaar
Although balance control has been studied extensively following acute concussion, little is known regarding repetitive sub-concussive head impacts or chronic exposure to multiple concussive events. Quiet stance postural control was characterized in contact sport athletes at pre-season (n = 135) and post-season (n = 48) to evaluate the effects of subconcussive trauma to the head. To determine the impact of acute concussion on postural control, athletes diagnosed with a concussion during the season (n = 12) were tested at 72-h, 2-weeks, and 1-month post-injury...
March 8, 2018: International Journal of Psychophysiology
A D Rogers, M Saggaf, N Ziolkowski
BACKGROUND: Patients with extensive burn injuries are susceptible to a host of accompanying adverse effects should they develop perioperative hypothermia, which occurs in up to ¼ of all major burn cases. This quality improvement project aimed to reduce the incidence of perioperative hypothermia to below 10% of cases in patients with major burn (Total Body Surface Area [TBSA] >15%), within a one year period. METHODS: A baseline diagnostic phase was undertaken to provide a greater understanding of the incidence, natural history and risk factors of perioperative hypothermia...
March 7, 2018: Burns: Journal of the International Society for Burn Injuries
Mozhgan Faraji Aylar, Amir Ali Jafarnezhadgero, Fatemeh Salari Esker
BACKGROUND: The association between visual sensory and sit-to-stand ground reaction force characteristics is not clear. Impulse is the amount of force applied over a period of time. Also, free moment represents the vertical moment applied in the center of pressure (COP). RESEARCH QUESTION: How the ground reaction force components, vertical loading rate, impulses and free moment respond to long and short term restricted visual information? METHODS: Fifteen female children with congenital blindness and 45 healthy girls with no visual impairments participated in this study...
March 5, 2018: Gait & Posture
Jonathan W Wallace, Brandon G Rasman, Brian H Dalton
Maintaining standing balance involves multisensory processing and integration to produce dynamic motor responses. Electrical vestibular stimulation (EVS) delivered over the mastoid processes can be used to explore the vestibular control of balance. The purpose of this study was to determine whether intrinsic foot muscles exhibit vestibular-evoked balance responses and to characterize the traits associated with these responses. Electromyography (EMG) of the abductor hallucis, abductor digiti minimi and medial gastrocnemius and anterior-posterior (AP) forces were sampled while quietly standing participants were subjected to a random continuous EVS signal (peak-to-peak amplitude = ±3 mA)...
March 7, 2018: Neuroscience
M P Serrano, P Gambín, T Landete-Castillejos, A García, J Cappelli, F J Pérez-Barbería, J A Gómez, L Gallego
This study describes the effects of Mn supplementation of 20 late-gestating and lactating Iberian red deer (Cervuselaphushispanicus) females (hinds) fed a balanced diet on milk production and milk composition over the lactation period. Body weight of their calves at birth and at weaning was also evaluated. In addition, the effect of lactation stage was studied. For these purposes, 2 groups of hinds, one composed by 12 individuals (experimental) and the other by 8 individuals (control) were compared. Experimental hinds were s...
March 6, 2018: Journal of Animal Science
Binu M Tripathi, James C Stegen, Mincheol Kim, Ke Dong, Jonathan M Adams, Yoo Kyung Lee
Little is known about the factors affecting the relative influences of stochastic and deterministic processes that govern the assembly of microbial communities in successional soils. Here, we conducted a meta-analysis of bacterial communities using six different successional soil datasets distributed across different regions. Different relationships between pH and successional age across these datasets allowed us to separate the influences of successional age (i.e., time) from soil pH. We found that extreme acidic or alkaline pH conditions lead to assembly of phylogenetically more clustered bacterial communities through deterministic processes, whereas pH conditions close to neutral lead to phylogenetically less clustered bacterial communities with more stochasticity...
March 7, 2018: ISME Journal
John R Speakman
Human obesity has a large genetic component, yet has many serious negative consequences. How this state of affairs has evolved has generated wide debate. The thrifty gene hypothesis was the first attempt to explain obesity as a consequence of adaptive responses to an ancient environment that in modern society become disadvantageous. The idea is that genes (or more precisely, alleles) predisposing to obesity may have been selected for by repeated exposure to famines. However, this idea has many flaws: for instance, selection of the supposed magnitude over the duration of human evolution would fix any thrifty alleles (famines kill the old and young, not the obese) and there is no evidence that hunter-gatherer populations become obese between famines...
March 7, 2018: Journal of Experimental Biology
Hiroshi Inui, Shuji Taketomi, Ryota Yamagami, Nobuyuki Shirakawa, Kouhei Kawaguchi, Sakae Tanaka
A new design of the so-called "guided-motion" total knee arthroplasty (TKA) is expected to produce normal-like kinematics. The implant behaves strictly as a mechanically constraint-guided motion system. However, no previous reports have demonstrated the most appropriate surgical technique or soft-tissue balance that would reproduce ideal kinematics. The purpose of this study was to clarify the relationship between soft-tissue balance and the intraoperative kinematics of guided-motion TKA. In this study, intraoperative kinematics of 95 patients whose TKA was performed with a guided-motion prosthesis (Journey II BCS Smith and Nephew) were measured using the computed tomography (CT)-free navigation system...
March 7, 2018: Journal of Knee Surgery
Apensu Dey, Victoria Sandre, Daniel Gerrard Marangoni, Soumen Ghosh
Ibuprofen (IBF), 2-(4-isobutylphenyl) propionic acid, is a surface active, common non-steroidal anti-inflammatory drug (NSAID); IBF possesses a high critical micelle concentration (cmc) when compared to conventional surfactants. The interactions of this common NSAID with an anionic surfactant, sodium octyl sulfosuccinate (AOT) were studied bytensiometric, fluorimetric, and calorimetric measurementsin order to investigate this system as a possible model drug delivery system for an NSAID like IBF, particularly in a high dose regime for IBF...
March 7, 2018: Journal of Physical Chemistry. B
Katie Stoll, Shobana Kubendran, Stephanie A Cohen
Precision medicine aims to approach disease treatment and prevention with consideration of the variability in genes, environment, and lifestyle for each person. This focus on the individual is also key to the practice of genetic counseling, whereby foundational professional values prioritize informed and autonomous patient decisions regarding their genetic health. Genetic counselors are ideally suited to help realize the goals of the precision medicine. However, a limited genetic counseling workforce at a time in which there is a rapidly growing need for services is challenging the balance of supply and demand...
March 7, 2018: American Journal of Medical Genetics. Part C, Seminars in Medical Genetics
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