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https://www.readbyqxmd.com/read/28344448/is-empirical-research-on-periodization-trustworthy-a-comprehensive-review-of-conceptual-and-methodological-issues
#1
REVIEW
José Afonso, Pantelis T Nikolaidis, Patrícia Sousa, Isabel Mesquita
Periodization is a core concept in training. Recently, systematic reviews and meta-analyses have attempted to provide a comprehensive overview of the topic, but theoretical criticisms have arisen with regard to how such research has been conducted. The purpose of the study was to review comprehensively the conceptual and methodological issues surrounding empirical research on periodization in training with human subjects. A search was conducted late in February 2016 on Academic Search Complete, CINAHL Plus, MedicLatina, MEDLINE, PsycINFO, PubMed, Scielo, Scopus, SPORTDiscus and Web of Science...
March 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28341827/neural-basis-of-negativity-bias-in-the-perception-of-ambiguous-facial-expression
#2
Takehito Ito, Keita Yokokawa, Noriaki Yahata, Ayako Isato, Tetsuya Suhara, Makiko Yamada
Negativity bias, which describes the tendency to interpret ambiguous stimuli or events as negative, is often observed in patients with depression and may prevent psychological well-being. Here, we used ambiguous facial stimuli, with negative (sad) and positive (happy) emotions simultaneously accessible, to examine neural activation during perceptual decision-making in healthy participants. The negativity bias was positively correlated with the activity of the bilateral pregenual anterior cingulate cortex (pgACC) when ambiguous faces were perceived as sad versus happy...
March 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28336835/improving-powder-magnetic-core-properties-via-application-of-thin-insulating-silica-nanosheet-layers-on-iron-powder-particles
#3
Toshitaka Ishizaki, Hideyuki Nakano, Shin Tajima, Naoko Takahashi
A thin, insulating layer with high electrical resistivity is vital to achieving high performance of powder magnetic cores. Using layer-by-layer deposition of silica nanosheets or colloidal silica over insulating layers composed of strontium phosphate and boron oxide, we succeeded in fabricating insulating layers with high electrical resistivity on iron powder particles, which were subsequently used to prepare toroidal cores. The compact density of these cores decreased after coating with colloidal silica due to the substantial increase in the volume, causing the magnetic flux density to deteriorate...
December 23, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28335969/design-synthesis-and-application-of-a-new-class-of-stimuli-responsive-separation-materials
#4
Roshanak Sepehrifar, Reinhard I Boysen, Basil Danylec, Yuanzhong Yang, Kei Saito, Milton T W Hearn
A new class of efficient stationary phase has been investigated for use in the liquid chromatographic separation of low molecular weight analytes and high molecular weight biomolecules, based on the application of immobilised stimuli-responsive polymers (SRPs). To this end, two polymeric units, namely poly(2-dimethylaminoethyl methacrylate) (PDMAEMA) and poly(acrylic acid) (PAA) were tethered to a triazine core. The derived poly(2-dimethyl-aminoethyl methacrylate)-block-poly(acrylic acid) (PDMAEMA-b-PAA), as a diblock co-polymer, was then immobilised onto the surface of porous silica particles...
April 22, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28335306/ionic-adsorption-and-desorption-of-cnt-nanoropes
#5
Jun-Jun Shang, Qing-Sheng Yang, Xiao-Hui Yan, Xiao-Qiao He, Kim-Meow Liew
A nanorope is comprised of several carbon nanotubes (CNTs) with different chiralities. A molecular dynamic model is built to investigate the ionic adsorption and desorption of the CNT nanoropes. The charge distribution on the nanorope is obtained by using a modified gradient method based on classical electrostatic theory. The electrostatic interactions among charged carbon atoms are calculated by using the Coulomb law. It was found here that the charged nanorope can adsorb heavy metal ions, and the adsorption and desorption can be realized by controlling the strength of applied electric field...
September 28, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28334984/interdisciplinary-working-in-public-health-research-a-proposed-good-practice-checklist
#6
L Gavens, J Holmes, G Bühringer, J McLeod, M Neumann, A Lingford-Hughes, E S Hock, P S Meier
Background: Guidance on how different disciplines from the natural, behavioural and social sciences can collaborate to resolve complex public health problems is lacking. This article presents a checklist to support researchers and principle investigators to develop and implement interdisciplinary collaborations. Methods: Fourteen individuals, representing 10 disciplines, participated in in-depth interviews to explore the strengths and challenges of working together on an interdisciplinary project to identify the determinants of substance use and gambling disorders, and to make recommendations for future interdisciplinary teams...
March 14, 2017: Journal of Public Health
https://www.readbyqxmd.com/read/28333905/-the-inflammatory-processes-in-atherogenesis
#7
Natalia Cichoń, Dominika Lach, Angela Dziedzic, Michał Bijak, Joanna Saluk
Atherogenesis is the process of atherosclerotic plaque formation, leading to coronary artery heart disease. This process involves immune cells, mainly T and B cells, monocytes and macrophages. The process of atherogenesis is induced by inflammatory damage of endothelial cells. The characteristic construction features of the atherosclerotic plaque is a predisposing factor for acute coronary syndromes. The accumulation of inflammatory cells in the artery inner membrane enhances the local inflammatory process due to the secretion of reactive oxygen species, inflammatory cytokines and metalloproteinases, which accelerate the development of atherosclerotic lesions in the arteries...
March 21, 2017: Polski Merkuriusz Lekarski: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/28333244/the-retro-rectus-prosthesis-for-core-myofascial-restoration-in-cosmetic-abdominoplasty
#8
Sheldon M Lincenberg
Background: The retro-rectus placement of a prosthesis for reinforcement of a hernia repair is a powerful surgical maneuver and results in reduced hernia recurrence rates in the absence of ventral hernia. Fascial reinforcement theoretically should improve columnar support to the spine and enhance athletic activity. The purpose of this study was to demonstrate the long-term efficacy of the restoration of the cylindrical lumbar abdominal myofascial complex as an adjunct to cosmetic abdominoplasty...
February 24, 2017: Aesthetic Surgery Journal
https://www.readbyqxmd.com/read/28332396/salinity-dependent-contact-angle-alteration-in-oil-brine-silicate-systems-the-critical-role-of-divalent-cations
#9
Martin E J Haagh, Igor Siretanu, Michael H G Duits, Frieder Mugele
The effectiveness of water flooding oil recovery depends to an important extent on the competitive wetting of oil and water on the solid rock matrix. Here, we use macroscopic contact angle goniometry in highly idealized model systems to evaluate how brine salinity affects the balance of wetting forces and to infer the microscopic origin of the resulting contact angle alteration. We focus in particular on two competing mechanisms debated in the literature, namely double layer expansion and divalent cation bridging...
March 23, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28330651/serial-assessment-of-tissue-precursors-and%C3%A2-progression-of-coronary-calcification-analyzed-by-fusion-of-ivus-and-oct-5-year-follow-up-of-scaffolded-and-nonscaffolded-arteries
#10
Yaping Zeng, Hiroki Tateishi, Rafael Cavalcante, Erhan Tenekecioglu, Pannipa Suwannasom, Yohei Sotomi, Carlos Collet, Shaoping Nie, Hans Jonker, Jouke Dijkstra, Maria D Radu, Lorenz Räber, Dougal R McClean, Robert-Jan van Geuns, Evald H Christiansen, Therese Fahrni, Jacques Koolen, Yoshinobu Onuma, Nico Bruining, Patrick W Serruys
OBJECTIVES: The aim of this study was to assess calcium growth with fused grayscale intravascular ultrasound (IVUS), IVUS-virtual histology, and optical coherence tomography (OCT) from baseline to 5-year follow-up in patients treated with bioresorbable vascular scaffolds. BACKGROUND: IVUS and OCT have individual strengths in assessing plaque composition and volume. Fusion of images obtained using these methods could potentially aid in coronary plaque assessment...
March 10, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28329860/modeling-intraindividual-dynamics-using-stochastic-differential-equations-age-differences-in-affect-regulation
#11
Julie Wood, Zita Oravecz, Nina Vogel, Lizbeth Benson, Sy-Miin Chow, Pamela Cole, David E Conroy, Aaron L Pincus, Nilam Ram
Objectives: Life-span theories of aging suggest improvements and decrements in individuals' ability to regulate affect. Dynamic process models, with intensive longitudinal data, provide new opportunities to articulate specific theories about individual differences in intraindividual dynamics. This paper illustrates a method for operationalizing affect dynamics using a multilevel stochastic differential equation (SDE) model, and examines how those dynamics differ with age and trait-level tendencies to deploy emotion regulation strategies (reappraisal and suppression)...
March 2, 2017: Journals of Gerontology. Series B, Psychological Sciences and Social Sciences
https://www.readbyqxmd.com/read/28327760/exactly-solvable-model-for-self-assembly-of-hard-core-soft-shell-particles-at-interfaces
#12
A Ciach, J Pękalski
A generic model for self-assembly of a monolayer of hybrid core-shell particles at an interface is developed. We assume that for distances larger than the size of the incompressible core a soft repulsion appears, and the repulsion is followed by an attraction at larger separations. The model is solved exactly in a one-dimensional lattice version. One, two or three periodic structures and variety of shapes of the pressure-density isotherms may occur in different versions of the model. For strong interactions the isotherm consists of nearly vertical segments at densities optimal for the periodic structures that are connected by segments with a small slope...
March 22, 2017: Soft Matter
https://www.readbyqxmd.com/read/28327734/band-edge-oscillator-strength-of-colloidal-cdse-cds-dot-in-rods-comparison-of-absorption-and-time-resolved-fluorescence-spectroscopy
#13
I Angeloni, W Raja, A Polovitsyn, F De Donato, R Proietti Zaccaria, I Moreels
We studied the oscillator strength fgap of the band gap transition in heteronanocrystals (hNCs) with a spherical CdSe core embedded in an elongated CdS shell. A comparison with fgap of core-only CdSe NCs confirmed a reduction of the electron-hole overlap in hNCs with a band gap larger than 2.05 eV or smaller than 1.98 eV. However, the decrease in fgap is limited to about 50% when compared to CdSe NCs, suggesting that residual confinement still localizes the electron near the core. We correlated fgap with the radiative lifetime obtained from multiexponential photoluminescence (PL) decay traces...
March 22, 2017: Nanoscale
https://www.readbyqxmd.com/read/28326734/-research-on-bond-durability-among-different-core-materials-and-zirconia-ceramic-cemented-by-self-adhesive-resin-cements
#14
Luo Xinyu, Meng Xiangfeng
OBJECTIVE: This research estimated shear bond durability of zirconia and different substrates cemented by two self-adhesive resin cements (Clearfil SA Luting and RelyX U100) before and after aging conditioning. METHODS: Machined zirconia ceramic discs were cemented with four kinds of core material (cobalt-chromium alloy, flowable composite resin core material, packable composite resin, and dentin) with two self-adhesive resin cements (Clearfil SA Luting and RelyX U100)...
February 1, 2017: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
https://www.readbyqxmd.com/read/28325039/strong-pinned-spin-mediated-memory-effect-in-nio-nanoparticles
#15
Ashish Chhaganlal Gandhi, Ting Shan Chan, Jayashree Pant, Sheng Yun Wu
After a decade of effort, a large number of magnetic memory nanoparticles with different sizes and core/shell compositions have been developed. While the field-cooling memory effect is often attributed to particle size and distribution effects, other magnetic coupling parameters such as inter- and intra-coupling strength, exchange bias, interfacial pinned spins, and the crystallinity of the nanoparticles also have a significant influence on magnetization properties and mechanisms. In this study, we used the analysis of static- and dynamic-magnetization measurements to investigate NiO nanoparticles with different sizes and discussed how these field-cooling strengths affect their memory properties...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28320490/effect-of-cu-on-nanoscale-precipitation-evolution-and-mechanical-properties-of-a-fe-nial-alloy
#16
Qin Shen, Hao Chen, Wenqing Liu
The microstructural evolution of precipitation in two model alloys, Fe-NiAl and Fe-NiAl-Cu, was investigated during aging at 500°C for different times using atom probe tomography (APT). The APT results reveal that the addition of Cu effectively increases the number density of NiAl precipitates. This is attributed to Cu promoting the nucleation of NiAl particles by increasing the chemical driving force and decreasing the interfacial energy. The NiAl precipitates of the Fe-NiAl-Cu alloy grow and coarsen at a slower rate than that of the Fe-NiAl alloy, mainly due to the slower diffusion rate of the Cu atoms...
March 21, 2017: Microscopy and Microanalysis
https://www.readbyqxmd.com/read/28317975/exposing-the-g-quadruplex-to-electric-fields-the-role-played-by-telomeres-in-the-propagation-of-dna-errors
#17
José Pedro Cerón-Carrasco, Denis Jacquemin
To protect their core machinery from the attack of exogenous agents, cells locate DNA in their nucleus. Nevertheless, some reactive chemical species and physical agents might reach DNA and alter its natural double helix structure. For instance, pulsed electric fields can be used to selectively rewrite the stored genetic information. However, for such modification to be effective, one needs, as a prerequisite, that the replication mechanism is not stopped by the field, so that the changes propagate over the following generations...
March 20, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28317827/-direct-restoration-of-the-tooth-crown-using-various-core-build-up-materials
#18
L N Maksimovskaya, V A Krutov, P V Kuprin, M A Kuprina
The aim of the study was to assess direct restorations mechanical properties (both in vitro and in vivo) to improve dental restorations quality after root canal treatment. Laboratory tests showed that using nanocomposite materials of dual curing with the fiberglass reinforced posts improves restoration strength in endodontically treated teeth: by 3.9±5.8% in class II Peroz restorations, 12.6±5.9 and 24.2±4.2% in class III and IV, correspondently. Using fiberglass reinforced posts (LuxaPost) for the restoration of the tooth crown after endodontic treatment significantly decreases the number of complications associated with marginal leakage of the restoration during first 2 years after treatment (p<005)...
2017: Stomatologii︠a︡
https://www.readbyqxmd.com/read/28315442/adsorption-and-desorption-behaviors-of-cesium-on-rayon-fibers-coated-with-chitosan-immobilized-with-prussian-blue
#19
Duangkamol Dechojarassri, Shohei Asaina, Sahori Omote, Kensuke Nishida, Tetsuya Furuike, Hiroshi Tamura
Rayon fiber coated with chitosan (CTS) that contained immobilized Prussian blue (KFe) (KFe/CTS/rayon) were investigated for the removal of cesium ion (Cs(+)) from contaminated water. The morphology and mechanical strength of the fibers were observed using scanning electron microscopy (SEM) and a universal testing machine, respectively. The Cs(+) concentration was determined by inductively coupled plasma-atomic emission spectroscopy. SEM images revealed that the surface of the KFe/CTS/rayon fiber showed the most roughness...
March 14, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28306194/electrospun-biodegradable-microfibers-induce-new-collagen-formation-in-a-rat-abdominal-wall-defect-model-a-possible-treatment-for-pelvic-floor-repair
#20
Cecilie Glindtvad, Menglin Chen, Jens Vinge Nygaard, Lise Wogensen, Axel Forman, Carl Christian Danielsen, Mehmet Berat Taskin, Karl-Erik Andersson, Susanne Maigaard Axelsen
Half of the female population over age 50 years will experience pelvic organ prolapse. We suggest a new approach based on tissue engineering principles to functionally reconstruct the anatomical structures of the pelvic floor. The aim of this study is to investigate the mechanical performance and effect on collagen and elastin production of a degradable mesh releasing basic fibroblast growth factor (bFGF). Implantation of biodegradable mesh with or without bFGF in their core has been conducted in 40 rats in an abdominal wall defect model...
March 17, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
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