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https://www.readbyqxmd.com/read/29793083/optimization-adsorption-of-norfloxacin-onto-polydopamine-microspheres-from-aqueous-solution-kinetic-equilibrium-and-adsorption-mechanism-studies
#1
Yibei Wan, Xiao Liu, Penglei Liu, Lei Zhao, Weihua Zou
Polydopamine microspheres (PDMPs) synthesized by a facile solution oxidation method were adopted as a potential adsorbent for the removal of Norfloxacin (NOR) from aqueous solution. The morphologies and properties of PDMPs were characterized using TEM, SEM, FTIR and pHPZC . Parameters effects such as contact time, initial pH, initial concentration and ionic strength on the adsorption capacity of NOR onto PDMPs were studied. To maximize NOR removal from liquid phase, Box-Behnken experimental design (BBD) combined with response surface modeling (RSM) was employed based on the 17 preliminary experiments at 308 K...
May 21, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29792807/micelles-protect-intact-metallo-supramolecular-block-copolymer-complexes-from-solution-to-gas-phase-during-electrospray-ionization
#2
Kai Hung Huang, Tsung-Han Tu, Shi-Cheng Wang, Yi-Tsu Chan, Cheng-Chih Hsu
Supramolecular diblock copolymers using metal-ligand coordination can be synthesized under ambient conditions by delicate design of the end groups of the homopolymer chains. However, mass spectrometric analysis of such metallo-supramolecular copolymers is challenging. One of the reasons is the nonpolarity of the polymer chains, making it hard to disperse the complexes in electrospray ionization (ESI)-friendly environments. The other difficulty is the noncovalent nature of such copolymers, which is easily disrupted during the ionization...
May 24, 2018: Analytical Chemistry
https://www.readbyqxmd.com/read/29792031/the-composition-in-the-interface-between-clay-mineral-surfaces-and-divalent-cation-electrolytes
#3
Stanislav Jelavić, A Rath Nielsen, S L S Stipp, N Bovet
The interfacial free energy of a solid, which determines its adsorption properties, depends on interactions between the surface and the fluid. A change in surface composition can completely change the behaviour of the solid. Decades of work have explored adsorption and its effects at solid-fluid interfaces from the macroscopic perspective and using molecular modelling so the concept of the electric double layer (EDL) is well established in the community. However, direct, molecular level, experimental observations of the composition within the interface region, and its change with time and conditions, is not abundant...
May 23, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29791707/evaluation-of-the-safety-and-efficacy-of-a-novel-radiofrequency-device-for-vaginal-treatment
#4
Jeffrey C Caruth
INTRODUCTION: Vaginal laxity and atrophy are caused mainly by aging and vaginal childbirth, which lead to a loss of strength and flexibility within the vaginal wall. As a result, women may experience vaginal, pelvic, sexual and urinary symptoms that significantly affect their quality of life. OBJECTIVE: The aim of this study was to evaluate the safety and efficacy of a novel radiofrequency (RF) device for internal and external vaginal treatment. METHODS: Thirty women who had been diagnosed with symptoms of vaginal laxity and pelvic relaxation received a single treatment that consisted of continuous RF in the internal genitalia and continuous RF followed by fractional RF in the external vulva...
June 1, 2018: Surgical Technology International
https://www.readbyqxmd.com/read/29791445/the-search-for-instantaneous-vection-an-oscillating-visual-prime-reduces-vection-onset-latency
#5
Stephen Palmisano, Bernhard E Riecke
Typically it takes up to 10 seconds or more to induce a visual illusion of self-motion ("vection"). However, for this vection to be most useful in virtual reality and vehicle simulation, it needs to be induced quickly, if not immediately. This study examined whether vection onset latency could be reduced towards zero using visual display manipulations alone. In the main experiments, visual self-motion simulations were presented to observers via either a large external display or a head-mounted display (HMD)...
2018: PloS One
https://www.readbyqxmd.com/read/29790739/universal-coatings-based-on-zwitterionic-dopamine-copolymer-microgels
#6
Mohammad Vatankhah-Varnoosfaderani, Xiaobo Hu, Qiaoxi Li, Hossein Adelnia, Maria Ina, Sergei S Sheiko
Multifunctional coatings that adhere to chemically-distinct substrates are vital in many industries, including automotive, aerospace, shipbuilding, construction, petrochemical, biomedical and pharmaceutical. We design well-defined, nearly monodisperse microgels that integrate hydrophobic dopamine methacrylamide (Dopamine-MA) monomers and hydrophilic zwitterionic monomers. The dopamine functionalities operate as both intra-particle crosslinkers and interfacial binders, respectively providing mechanical strength of the coatings and their strong adhesion to different substrates...
May 23, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29790195/a-licence-to-drive-neurological-illness-loss-and-disruption
#7
Melissa Stepney, Susan Kirkpatrick, Louise Locock, Suman Prinjha, Sara Ryan
The sense of freedom and independence that being able to drive generates may be taken for granted by many until it is threatened by illness. Drawing on the 'mobility turn' in social sciences that emphasises the social and emotional significance of the car (Sheller and Urry , ), this article presents secondary analysis of narratives of driving and its significance across four neurological conditions (epilepsy, Parkinson's disease, transient ischaemic attack and motor neurone disease). Taking an interactionist approach we explore how the withdrawal of a driving licence can represent not just a practical and emotional loss of independence, but also loss of enjoyment; of a sense and feeling of 'normal' adulthood and social participation; and of an identity (in some cases gendered) of strength and power...
May 22, 2018: Sociology of Health & Illness
https://www.readbyqxmd.com/read/29790033/biomechanical-properties-of-polymer-infiltrated-ceramic-crowns-on-one-piece-zirconia-implants-after-long-term-chewing-simulation
#8
Pia Baumgart, Holger Kirsten, Rainer Haak, Constanze Olms
BACKGROUND: Implant and superstructure provide a complex system, which has to withstand oral conditions. Concerning the brittleness of many ceramics, fractures are a greatly feared issue. Therefore, polymer-infiltrated ceramic networks (PICNs) were developed. Because of its low Young's modulus and high elastic modulus, the PICN crown on a one-piece zirconia implant might absorb forces to prevent the system from fracturing in order to sustain oral forces. Recommendations for the material of superstructure on zirconia implants are lacking, and only one study investigates PICN crowns on these types of implants...
May 23, 2018: International Journal of Implant Dentistry
https://www.readbyqxmd.com/read/29789578/sk-channel-activation-is-neuroprotective-in-conditions-of-enhanced-er-mitochondrial-coupling
#9
Birgit Honrath, Inge E Krabbendam, Carmen IJsebaart, Valentina Pegoretti, Nadia Bendridi, Jennifer Rieusset, Martina Schmidt, Carsten Culmsee, Amalia M Dolga
Alterations in the strength and interface area of contact sites between the endoplasmic reticulum (ER) and mitochondria contribute to calcium (Ca2+ ) dysregulation and neuronal cell death, and have been implicated in the pathology of several neurodegenerative diseases. Weakening this physical linkage may reduce Ca2+ uptake into mitochondria, while fortifying these organelle contact sites may promote mitochondrial Ca2+ overload and cell death. Small conductance Ca2+ -activated K+ (SK) channels regulate mitochondrial respiration, and their activation attenuates mitochondrial damage in paradigms of oxidative stress...
May 22, 2018: Cell Death & Disease
https://www.readbyqxmd.com/read/29789492/a-continuum-model-for-the-effect-of-dynamic-recrystallization-on-the-stress%C3%A2-strain-response
#10
H Kooiker, E S Perdahcıoğlu, A H van den Boogaard
Austenitic Stainless Steels and High-Strength Low-Alloy (HSLA) steels show significant dynamic recovery and dynamic recrystallization (DRX) during hot forming. In order to design optimal and safe hot-formed products, a good understanding and constitutive description of the material behavior is vital. A new continuum model is presented and validated on a wide range of deformation conditions including high strain rate deformation. The model is presented in rate form to allow for the prediction of material behavior in transient process conditions...
May 22, 2018: Materials
https://www.readbyqxmd.com/read/29788768/short-term-impact-of-tdcs-over-the-right-inferior-frontal-cortex-on-impulsive-responses-in-a-go-no-go-task
#11
Salvatore Campanella, Elisa Schroder, Marie-Anne Vanderhasselt, Chris Baeken, Charles Kornreich, Paul Verbanck, Boris Burle
Inhibitory control, a process deeply studied in laboratory settings, refers to the ability to inhibit an action once it has been initiated. A common way to process data in such tasks is to take the mean response time (RT) and error rate per participant. However, such an analysis ignores the strong dependency between spontaneous RT variations and error rate. Conditional accuracy function (CAF) is of particular interest, as by plotting the probability of a response to be correct as a function of its latency, it provides a means for studying the strength of impulsive responses associated with a higher frequency of fast response errors...
May 1, 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/29787273/restoring-size-consistency-of-approximate-functionals-constructed-from-the-adiabatic-connection
#12
Stefan Vuckovic, Paola Gori-Giorgi, Fabio Della Sala, Eduardo Fabiano
Approximate exchange-correlation functionals built by modeling in a non-linear way the adiabatic connection (AC) integrand of density functional theory have many attractive features, being virtually parameters-free and satisfying different exact properties, but they also have a fundamental flaw: they violate the size-consistency condition, crucial to evaluate interaction energies of molecular systems. We show that size consistency in the AC-based functionals can be restored in a very simple way at no extra computational cost...
May 22, 2018: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/29786631/comparison-between-elite-and-subelite-swimmers-on-dry-land-and-tumble-turn-leg-extensor-force-time-characteristics
#13
Julian V Jones, David B Pyne, G Greg Haff, Robert U Newton
Jones, JV, Pyne, DB, Haff, GG, and Newton, RU. Comparison between elite and subelite swimmers on dry land and tumble turn leg extensor force-time characteristics. J Strength Cond Res 32(6): 1762-1769, 2018-Elite swimmers demonstrate faster swimming turn times that are potentially a result of having better strength-power characteristics than subelite swimmers. We quantified differences between dry-land and swimming turn force-time characteristics in elite swimmers and subelite swimmers. Subelite (11 males: 17...
June 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29786630/effect-of-cadence-on-time-trial-performance-in-recreational-female-cyclists
#14
Patricia L Graham, Robert F Zoeller, Patrick L Jacobs, Michael A Whitehurst
Graham, PL, Zoeller, RF, Jacobs, PL, and Whitehurst, MA. Effect of cadence on time trial performance in recreational female cyclists. J Strength Cond Res 32(6): 1739-1744, 2018-The impact of pedaling cadence on cycling performance remains unresolved especially in female cyclists. The purpose of this study was to determine the effect of cadence on time trial (TT) performance in recreational female cyclists. Ten recreational female cyclists volunteered to participate in this study. Subjects performed 3 exercise sessions: 1 to assess peak oxygen uptake (V[Combining Dot Above]O2peak) and 2 TTs...
June 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29786626/observation-of-women-soccer-players-physiology-during-a-single-season
#15
Kathleen M Paulsen, Cory L Butts, Brendon P McDermott
Paulsen, KM, Butts, CL, and McDermott, BP. Observation of women soccer players' physiology during a single season. J Strength Cond Res 32(6): 1702-1707, 2018-The purpose of this study was to observe heart rate (HR) responses in match settings over the course of a conference season in National Collegiate Athletic Association Division I women's soccer. Twenty-one female collegiate soccer players were provided a HR monitor and instructed to wear it for the duration of match play. Player positions included 6 defenders (DEF), 6 midfielders (MID), and 9 forwards (FWD)...
June 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29786625/differences-in-glenohumeral-joint-rotation-and-peak-power-output-between-super-league-and-championship-rugby-league-players
#16
Matthew R Haines
Haines, MR. Differences in glenohumeral joint rotation and peak power output between Super League and Championship Rugby League players. J Strength Cond Res 32(6): 1685-1691, 2018-Rugby league is a high-intensity sport with large impact forces sustained during play, resulting in high prevalence of shoulder injury. Consequently, shoulder strength and player power are important considerations for injury prevention and performance. Additionally, professional teams regularly compete against semiprofessional teams, where differences in physical conditioning could be marked...
June 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29786612/a-formalism-for-reference-dosimetry-in-photon-beams-in-the-presence-of-a-magnetic-field
#17
Bram van Asselen, Simon J Woodings, Sara L Hackett, Theo L van Soest, Jan G M Kok, Bas W Raaymakers, Jochem W H Wolthaus
A generic formalism is proposed for reference dosimetry in the presence of a magnetic field. Besides the regular correction factors from the conventional reference dosimetry formalisms, two factors are used to take into account magnetic field effects: 1) a dose conversion factor to correct for the change in local dose distribution and 2) a correction of the reading of the dosimeter used for the reference dosimetry measurements. The formalism was applied to the Elekta MRI-Linac, for which the 1.5 T magnetic field is orthogonal to the 7 MV photon beam...
May 22, 2018: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29786415/tailoring-crystalline-morphology-by-high-efficiency-nucleating-fiber-towards-high-performance-poly-l-lactide-biocomposites
#18
Tao Gao, Zheng-Min Zhang, Le Li, Rui-Ying Bao, Zhengying Liu, Bang-Hu Xie, Ming-Bo Yang, Wei Yang
In this work, high melting point poly(L-lactide) fiber (hPLLA fiber) with high-efficiency nucleation activity was prepared and introduced into PLLA matrix to prepare fully biodegradable PLLA biocomposites. The highly active nucleating surfaces of hPLLA fiber induced chain ordering and lamellar organization, leading to preferable formation of well-organized PLLA transcrystallinity at the surface of hPLLA fiber in quiescent conditions. The construction of such compact transcrystallinity increased the crystallinity and enhanced the interfacial adhesion, which largely promoted the heat resistance, tensile strength, and barrier property of PLLA biocomposites at a low content of hPLLA fiber...
May 22, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29785242/role-of-oxidative-stress-as-key-regulator-of-muscle-wasting-during-cachexia
#19
REVIEW
Johanna Ábrigo, Alvaro A Elorza, Claudia A Riedel, Cristian Vilos, Felipe Simon, Daniel Cabrera, Lisbell Estrada, Claudio Cabello-Verrugio
Skeletal muscle atrophy is a pathological condition mainly characterized by a loss of muscular mass and the contractile capacity of the skeletal muscle as a consequence of muscular weakness and decreased force generation. Cachexia is defined as a pathological condition secondary to illness characterized by the progressive loss of muscle mass with or without loss of fat mass and with concomitant diminution of muscle strength. The molecular mechanisms involved in cachexia include oxidative stress, protein synthesis/degradation imbalance, autophagy deregulation, increased myonuclear apoptosis, and mitochondrial dysfunction...
2018: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/29784963/single-entity-resolution-valving-of-nanoscopic-species-in-liquids
#20
Patric Eberle, Christian Höller, Philipp Müller, Maarit Suomalainen, Urs F Greber, Hadi Eghlidi, Dimos Poulikakos
Investigating biological and synthetic nanoscopic species in liquids, at the ultimate resolution of single entity, is important in diverse fields1-5 . Progress has been made6-10 , but significant barriers need to be overcome such as the need for intense fields, the lack of versatility in operating conditions and the limited functionality in solutions of high ionic strength for biological applications. Here, we demonstrate switchable electrokinetic nanovalving able to confine and guide single nano-objects, including macromolecules, with sizes down to around 10 nanometres, in a lab-on-chip environment...
May 21, 2018: Nature Nanotechnology
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