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https://www.readbyqxmd.com/read/29161624/are-there-associations-with-age-and-sex-in-walking-stability-in-healthy-older-adults
#1
Daan van Kooten, Florentina Hettinga, Kim Duffy, Jo Jackson, Matthew J D Taylor
The variability of the centre of pressure (COP) during walking can provide information in relation to stability when walking. The aim of this study was to investigate if age and sex were associated with COP variability, COP excursions, and COP velocities during walking. One-hundred and fourteen older adults (age 65.1±5.5 yrs.) participated in the study. A Kistler force platform (1000Hz) recorded the ground reaction forces and COPs during walking at a self-selected walking speed. The stance phase was divided, using the vertical GRF, into four sub-phases: loading response (LR), mid-stance (MSt), terminal stance (TSt), and pre-swing (PSw)...
November 13, 2017: Gait & Posture
https://www.readbyqxmd.com/read/29156378/effect-of-robotic-assisted-gait-rehabilitation-on-dynamic-equilibrium-control-in-the-gait-of-children-with-cerebral-palsy
#2
L Wallard, G Dietrich, Y Kerlirzin, J Bredin
Due to the intensity and repetition of movement, roboticassisted gait training therapy could have a beneficial effect on the recovery and improvement of postural and locomotor functions of the patient. This study sought to highlight the effects of robotic-assisted gait rehabilitation in gait of children with Cerebral Palsy (CP). We analyzed the different strategies before and after this rehabilitation which was used in order to generate forward motion while maintaining balance. Data were collected by a motion analysis system (Vicon® - Oxford Metrics, Oxford, UK)...
November 11, 2017: Gait & Posture
https://www.readbyqxmd.com/read/29155704/experimental-system-of-solar-adsorption-refrigeration-with-concentrated-collector
#3
Z X Yuan, Y X Li, C X Du
To improve the performance of solar adsorption refrigeration, an experimental system with a solar concentration collector was set up and investigated. The main components of the system were the adsorbent bed, the condenser, the evaporator, the cooling sub-system, and the solar collector. In the first step of the experiment, the vapor-saturated bed was heated by the solar radiation under closed conditions, which caused the bed temperature and pressure to increase. When the bed pressure became high enough, the bed was switched to connect to the condenser, thus water vapor flowed continually from the bed to the condenser to be liquefied...
October 18, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29154264/the-effect-of-a-single-massage-based-on-the-tensegrity-principle-on-postural-stability-in-young-women
#4
Błażej Cieślik, Ireneusz Podsiadły, Michał Kuczyński, Bożena Ostrowska
OBJECTIVE: The aim of this study was to investigate the effects of normalized muscle tension via tensegrity-based massage on postural stability in a sample of female young adults. METHODS: Nineteen females aged 21.8 ± 1.9 years were recruited presenting abnormal tension at muscles adhering to any of the following structural sites: superior iliac spine, lateral sacropelvic surface, linea aspera at 1/2 of femur length, and superior nuchal line of the occiput. Balance and postural control were assessed during bipedal stance using a force platform in multiple conditions: hard surface or soft foam surface with the head in either a neutral posture or tilted backward...
November 6, 2017: Journal of Back and Musculoskeletal Rehabilitation
https://www.readbyqxmd.com/read/29153089/chromatographic-separation-of-the-theranostic-radionuclide-111-ag-from-a-proton-irradiated-thorium-matrix
#5
Tara Mastren, Valery Radchenko, Jonathan W Engle, John W Weidner, Allison Owens, Lance E Wyant, Roy Copping, Mark Brugh, F Meiring Nortier, Eva R Birnbaum, Kevin D John, Michael E Fassbender
Column chromatographic methods have been developed to separate no-carrier-added (111)Ag from proton irradiated thorium targets and associated fission products as an ancillary process to an existing (225)Ac separation design. Herein we report the separation of (111)Ag both prior and subsequent to (225)Ac recovery using CL resin, a solvent impregnated resin (SIR) that carries an organic solution of alkyl phosphine sulfides (R3P = S) and alkyl phosphine oxides (R3P = O). The recovery yield of (111)Ag was 93 ± 9% with a radiochemical purity of 99...
January 15, 2018: Analytica Chimica Acta
https://www.readbyqxmd.com/read/29149991/a-fast-and-low-cost-microfabrication-approach-for-six-types-of-thermoplastic-substrates-with-reduced-feature-size-and-minimized-bulges-using-sacrificial-layer-assisted-laser-engraving
#6
Longjun Gu, Guodong Yu, Cheuk-Wing Li
Since polydimethylsiloxane (PDMS) is notorious for its severe sorption to biological compounds and even nanoparticles, thermoplastics become a promising substrate for microdevices. Although CO2 laser engraving is an efficient method for thermoplastic device fabrication, it accompanies with poor bonding issues due to severe bulging and large feature size determined by the diameter of laser beam. In this study, a low-cost microfabrication method is proposed by reversibly sealing a 1 mm thick polymethylmethacrylate (PMMA) over an engraving substrate to reduce channel feature size and minimize bulges of laser engraved channels...
January 2, 2018: Analytica Chimica Acta
https://www.readbyqxmd.com/read/29149471/polyaniline-derived-n-doped-carbon-coated-cobalt-phosphide-nanoparticles-deposited-on-n-doped-graphene-as-an-efficient-electrocatalyst-for-hydrogen-evolution-reaction
#7
Jingwen Ma, Min Wang, Guangyu Lei, Guoliang Zhang, Fengbao Zhang, Wenchao Peng, Xiaobin Fan, Yang Li
The development of highly efficient and durable non-noble metal electrocatalysts for the hydrogen evolution reaction (HER) is significant for clean and renewable energy research. This work reports the synthesis of N-doped graphene nanosheets supported N-doped carbon coated cobalt phosphide (CoP) nanoparticles via a pyrolysis and a subsequent phosphating process by using polyaniline. The obtained electrocatalyst exhibits excellent electrochemical activity for HER with a small overpotential of -135 mV at 10 mA cm(-2) and a low Tafel slope of 59...
November 17, 2017: Small
https://www.readbyqxmd.com/read/29148969/the-structure-of-the-copi-coat-determined-within-the-cell
#8
Yury S Bykov, Miroslava Schaffer, Svetlana O Dodonova, Sahradha Albert, Jürgen M Plitzko, Wolfgang Baumeister, Benjamin D Engel, John Ag Briggs
COPI-coated vesicles mediate trafficking within the Golgi apparatus and from the Golgi to the endoplasmic reticulum. The structures of membrane protein coats, including COPI, have been extensively studied with in vitro reconstitution systems using purified components. In a previous paper (Dodonova et al., 2017), we determined a complete structural model of the in vitro reconstituted COPI coat. Here, we applied cryo-focused ion beam milling, cryo-electron tomography and subtomogram averaging to determine the native structure of the COPI coat within vitrified Chlamydomonas reinhardtii cells...
November 17, 2017: ELife
https://www.readbyqxmd.com/read/29142864/count-of-platelet-and-mean-platelet-volume-score-serologic-prognostic-factor-in-patients-with-oral-squamous-cell-carcinoma
#9
Jae Woo Park, Chul-Hwan Kim, Yong Chan Ha, Moon Young Kim, Sung Min Park
Objectives: TNM staging, especially for lymph node metastasis, is the scoring system most widely used among prognostic factors for cancer survival. Several biomarkers have been studied as serologic markers, but their specificity is low and clinical applications are difficult. This study aimed to establish a scoring system for patients with oral squamous cell carcinoma (OSCC) using platelet (PLT) and mean platelet volume (MPV) levels measured postoperatively and to evaluate their significance as prognostic factors...
October 2017: Journal of the Korean Association of Oral and Maxillofacial Surgeons
https://www.readbyqxmd.com/read/29141178/peri-conception-and-first-trimester-diet-modifies-reproductive-development-in-bulls
#10
K J Copping, M D Ruiz-Diaz, C S Rutland, N P Mongan, M J Callaghan, I C McMillen, R J Rodgers, V E A Perry
Nutritional perturbation during gestation alters male reproductive development in rodents and sheep. In cattle both the developmental trajectory of the feto-placental unit and its response to dietary perturbations is dissimilar to that of these species. This study examined the effects of dietary protein perturbation during the peri-conception and first trimester periods upon reproductive development in bulls. Nulliparous heifers (n=360) were individually fed a high- or low-protein diet (HPeri and LPeri) from 60 days before conception...
November 16, 2017: Reproduction, Fertility, and Development
https://www.readbyqxmd.com/read/29138873/effects-of-cognitive-load-on-the-amount-and-temporal-structure-of-postural-sway-variability-in-stroke-survivors
#11
Hajar Mehdizadeh, Kinda Khalaf, Hamed Ghomashchi, Ghorban Taghizadeh, Ismaeil Ebrahimi, Parvaneh Taghavi Azar Sharabiani, Seyed Javad Mousavi, Mohamad Parnianpour
This study aimed to investigate the variability in postural sway patterns during quiet standing in stroke survivors. The postural sway was measured in 19 stroke survivors, as well as 19 healthy demographically matched participants, at 3 levels of postural difficulty (rigid surface with closed and open eyes, and foam surface with closed eyes), and 3 levels of cognitive difficulty (without a cognitive task, easy and difficult cognitive tasks). Both linear analyses (the amount of postural sway variability, including the standard deviation of the COP velocity in both the anteroposterior (AP) and mediolateral (ML) directions), as well as non-linear analyses [the temporal structure of the COP variability, including % Recurrence, % Determinism, Shannon Entropy, Trend and the maximum diagonal line (D max)] were employed...
November 14, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/29136550/cerebellar-transcranial-direct-current-stimulation-improves-adaptive-postural-control
#12
Peter Poortvliet, Billie Hsieh, Andrew Cresswell, Jacky Au, Marcus Meinzer
OBJECTIVE: Rehabilitation interventions contribute to recovery of impaired postural control, but it remains a priority to optimize their effectiveness. A promising strategy may involve transcranial direct current stimulation (tDCS) of brain areas involved in fine-tuning of motor adaptation. This study explored the effects of cerebellar tDCS (ctDCS) on postural recovery from disturbance by Achilles tendon vibration. METHODS: Twenty-eight healthy volunteers participated in this sham-ctDCS controlled study...
October 20, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/29126606/balance-study-in-asymptomatic-subjects-determination-of-significant-variables-and-reference-patterns-to-improve-clinical-application
#13
Juan de la Torre, Javier Marin, Jose J Marin, Jose M Auria, Maria B Sanchez-Valverde
Postural control is essential when carrying out everyday activities and its possible disorders have a very significant impact on personal autonomy. To provide the means to accurately measure postural control in the clinical environment, this study checks and discusses the suitability of procedures for a new balance assessment system with a stabilometric platform (MoveHuman-Dyna © UZ-IDERGO), which meets the criteria of clinical stabilometric standardisation established by the International Society for Posture and Gait Research (ISPGR) at the Bologna meeting (2009)...
November 7, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/29125626/impact-of-air-frying-on-cholesterol-and-fatty-acids-oxidation-in-sardines-protective-effects-of-aromatic-herbs
#14
Fernanda S Ferreira, Geni R Sampaio, Laura M Keller, Alexandra C H F Sawaya, Davy W H Chávez, Elizabeth A F S Torres, Tatiana Saldanha
The high temperatures used to fry fish may induce thermo-oxidation of cholesterol, forming cholesterol oxidation products (COPs). COPs have been associated to coronary heart diseases, atherosclerosis, and other chronic diseases. Air fryers are an alternative thermal process technology to fry foods without oil, and are considered a healthier cooking method. This study is the 1st to evaluate the formation of COPs and the degradation of polyunsaturated fatty acids (PUFAs) in air-fried sardine fillets. Furthermore, we evaluated the effect of fresh herbs added as natural antioxidants to sardines subjected to air frying...
November 10, 2017: Journal of Food Science
https://www.readbyqxmd.com/read/29120261/effects-of-vision-and-cognitive-load-on-static-postural-control-in-subjects-with-and-without-patellofemoral-pain-syndrome
#15
Afsaneh Zeinalzadeh, Saeed Talebian, Soofia Naghdi, Mahyar Salavati, Salman Nazary-Moghadam, Bahareh Zeynalzadeh Ghoochani
OBJECTIVE: To compare the effects of vision and cognitive load on static postural control in subjects with and without patellofemoral pain syndrome (PFPS). METHODS: Twenty-eight PFPS patients and 28 controls participated in the study. Postural control was assessed in isolation as well as with visual manipulation and cognitive loading on symptomatic limb. The outcome measures of postural control were quantified in terms of area, anterior-posterior (AP), medial-lateral (ML), and mean velocity (MV) of the displacements of center of pressure (COP)...
November 9, 2017: Physiotherapy Theory and Practice
https://www.readbyqxmd.com/read/29117248/medial-knee-loading-is-altered-in-subjects-with-early-osteoarthritis-during-gait-but-not-during-step-up-and-over-task
#16
Susana Meireles, Mariska Wesseling, Colin R Smith, Darryl G Thelen, Sabine Verschueren, Ilse Jonkers
This study evaluates knee joint loading during gait and step-up-and-over tasks in control subjects, subjects with early knee OA and those with established knee OA. Thirty-seven subjects with varying degrees of medial compartment knee OA severity (eighteen with early OA and sixteen with established OA), and nineteen healthy controls performed gait and step-up-and-over tasks. Knee joint moments, contact forces (KCF), the magnitude of contact pressures and center of pressure (CoP) location were analyzed for the three groups for both activities using a multi-body knee model with articular cartilage contact, 14 ligaments, and six degrees of freedom tibiofemoral and patellofemoral joints...
2017: PloS One
https://www.readbyqxmd.com/read/29115125/heterostructured-arrays-of-nixp-s-se-nanosheets-on-coxp-s-se-nanowires-for-efficient-hydrogen-evolution
#17
Weiqiang Tang, Jianying Wang, Lixia Guo, Xue Teng, Thomas J Meyer, Zuofeng Chen
Development of efficient electrocatalysts for hydrogen evolution reaction (HER) is of increasing importance in energy conversion schemes. The earth abundant transition-metal phosphides, especially CoP and Ni2P, have emerged as promising catalysts for HER. We describe here the preparation and characterization of a hybrid catalyst of Ni2P nanosheets@CoP nanowires on carbon cloth (CC) for the reaction. The heterostructure and synergistic effects of the Ni2P and CoP components result in an extremely low overpotential of 55 mV for achieving a catalytic current density of 10 mA cm‒2, which is remarkable for transition-metal phosphide electrocatalysts...
November 8, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29111686/centrifugation-controlled-thermal-convection-and-its-application-to-rapid-microfluidic-polymerase-chain-reaction-devices
#18
Masato Saito, Kazuya Takahashi, Yuichiro Kiriyama, Wilfred Villariza Espulgar, Hiroshi Aso, Tadanobu Sekiya, Yoshikazu Tanaka, Tsuneo Sawazumi, Satoshi Furui, Eiichi Tamiya
Here, we report the developed cyclo olefin polymer (COP) microfluidic chip on a fabricated rotating heater stage that utilizes centrifugation-assisted thermal cycle in a ring-structured microchannel for polymerase chain reaction (PCR). The PCR solution could be driven by thermal convection and continuously exchanged high/low temperatures in a ring structured microchannel without the use of typical syringe pump. More importantly, the flow rate was controlled by the relative gravitational acceleration only. The platform enables amplification within 10 min at 5G and has a detection limit of 70...
November 17, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/29109444/highly-performance-core-shell-tio2-b-anatase-homojunction-nanobelts-with-active-cobalt-phosphide-cocatalyst-for-hydrogen-production
#19
Guang Yang, Hao Ding, Jiejie Feng, Qiang Hao, Sijia Sun, Weihua Ao, Daimei Chen
In this paper, a highly efficient core-shell structure of TiO2(B)/anatase photocatalyst with CoP cocatalyst has been synthesized via hydrothermal processes and a mechanical milling method. The designed core-shell TiO2(B)/anatase photocatalysts exhibit excellent performance by compared with pure TiO2(B) and anatase phase. With the participation of CoP particles, there is drastically enhanced  photocatalytic activity of TiO2(B)/anatase, and the H2-production rate can be up to 7400 μmol·g(-1), which is about 3...
November 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29103858/mental-stress-peripheral-vascular-reactivity-is-elevated-in-women-with-coronary-vascular-dysfunction-results-from-the-nhlbi-sponsored-cardiac-autonomic-nervous-system-cans-study
#20
Puja K Mehta, Melody Hermel, Michael D Nelson, Galen Cook-Wiens, Elizabeth A Martin, Ayman A Alkhoder, Janet Wei, Margo Minissian, Chrisandra L Shufelt, Sailaja Marpuri, David Hermel, Amit Shah, Michael R Irwin, David S Krantz, Amir Lerman, C Noel Bairey Merz
BACKGROUND: Women with chest pain, ischemia, and no obstructive coronary artery disease often have coronary vascular dysfunction (CVaD). Peripheral vascular reactivity to mental stress may contribute mechanistic understanding of stress-induced ischemia in women with CVaD. METHODS: 62 women (41 CVaD and 21 controls) underwent mental stress testing (MST) with anger recall, mental arithmetic, and forehead cold pressor (COP) challenge. Emotional arousal was measured (Likert scale)...
October 22, 2017: International Journal of Cardiology
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