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https://www.readbyqxmd.com/read/28548510/density-propagator-for-many-body-localization-finite-size-effects-transient-subdiffusion-and-exponential-decay
#1
Soumya Bera, Giuseppe De Tomasi, Felix Weiner, Ferdinand Evers
We investigate charge relaxation in quantum wires of spinless disordered fermions (t-V model). Our observable is the time-dependent density propagator Π_{ϵ}(x,t), calculated in windows of different energy density ϵ of the many-body Hamiltonian and at different disorder strengths W, not exceeding the critical value W_{c}. The width Δx_{ϵ}(t) of Π_{ϵ}(x,t) exhibits a behavior dlnΔx_{ϵ}(t)/dlnt=β_{ϵ}(t), where the exponent function β_{ϵ}(t)≲1/2 is seen to depend strongly on L at all investigated parameter combinations...
May 12, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28548504/theory-of-magnetic-ordering-in-the-heavy-rare-earths-ab%C3%A2-initio-electronic-origin-of-pair-and-four-spin-interactions
#2
Eduardo Mendive-Tapia, Julie B Staunton
We describe a disordered local moment theory for long-period magnetic phases and investigate the temperature and magnetic field dependence of the magnetic states in the heavy rare earth elements (HREs), namely, paramagnetic, conical and helical antiferromagnetic (HAFM), fan, and ferromagnetic (FM) states. We obtain a generic HRE magnetic phase diagram which is consequent on the response of the common HRE valence electronic structure to f-electron magnetic moment ordering. The theory directly links the first-order HAFM-FM transition to the loss of Fermi surface nesting, induced by this magnetic ordering, as well as provides a template for analyzing the other phases and exposing where f-electron correlation effects are particularly intricate...
May 12, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28548501/structure-and-properties-of-sodium-enneaborate-na2-b8o11-oh-4-%C3%A2-b-oh-3%C3%A2-2h2o
#3
Doinita Neiner, Yulia V Sevryugina, Larry S Harrower, David M Schubert
Millions of tons of sodium borates are used annually by global industries in diverse applications important to modern society. The Na2O-B2O3-H2O phase diagram in the 0-100 °C temperature range contains 13 unique hydrated crystalline sodium borates, including five important industrial products. Structures were previously reported for each of these except for that having the highest boron content, known as sodium enneaborate, Na4B18O29·11H2O or 2Na2O·9B2O3·11H2O (1). Here we report the single-crystal structure of 1, revealing the structural formula Na2[B8O11(OH)4]·B(OH)3·2H2O, and describe some of its properties and relationships to other sodium borates...
May 26, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28546841/the-effect-of-cyclodextrin-complexation-on-the-solubility-and-photostability-of-nerolidol-as-pure-compound-and-as-main-constituent-of-cabreuva-essential-oil
#4
Joyce Azzi, Pierre-Edouard Danjou, David Landy, Steven Ruellan, Lizette Auezova, Hélène Greige-Gerges, Sophie Fourmentin
Nerolidol (Ner), a major component of many plant essential oils, is known for its various biological properties. However, the low solubility of Ner in water and its susceptibility to degradation limit its application. The aim of our study was to improve the solubility and photostability of Ner through its encapsulation in different cyclodextrins (CDs). The formation constants of cis-, trans-Ner and their commercial mixture with various CDs (α-CD, β-CD, γ-CD, HP-β-CD, RAMEB, CRYSMEB and SBE-β-CD) were determined by phase solubility studies and confirmed by the spectral displacement UV-visible method...
2017: Beilstein Journal of Organic Chemistry
https://www.readbyqxmd.com/read/28546106/enhanced-dissolution-and-skin-permeation-profiles-of-epalrestat-with-%C3%AE-cyclodextrin-derivatives-using-a-cogrinding-method
#5
Takayuki Furuishi, Shoma Takahashi, Noriko Ogawa, Mihoko Gunji, Hiromasa Nagase, Toyofumi Suzuki, Tomohiro Endo, Haruhisa Ueda, Etsuo Yonemochi, Kazuo Tomono
Epalrestat (EPL) is a water-insoluble drug (14μM) that inhibits aldose reductase. This study investigated the interactions between β-cyclodextrin (CD) derivatives and EPL to determine the solubilizing effect on EPL from phase solubility diagrams. We improved the solubility of EPL in water by adding β-CD derivatives. Moreover, the solubility of EPL mixed with β-CD derivatives by cogrinding in a ball mill method was about 2-3 times higher than those of EPL with the same CD concentration (5mM) calculated from phase solubility diagrams...
May 22, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28546070/efficient-loading-of-ethionamide-in-cyclodextrin-based-carriers-offers-enhanced-solubility-and-inhibition-of-drug-crystallization
#6
Jitendra Wankar, Giuseppina Salzano, Elisabetta Pancani, Gabor Benkovics, Milo Malanga, Francesco Manoli, Ruxandra Gref, Eva Fenyvesi, Ilse Manet
Ethionamide (ETH) is a second line antitubercular drug suffering from poor solubility in water and strong tendency to crystallize. These drawbacks were addressed by loading ETH in β-cyclodextrin (βCyD)-based carriers. The drug was incorporated in a molecular state avoiding crystallization even for long-term storage and obtaining a tenfold increased solubility up to 25mM. The binding of ETH to polymeric βCyD nanoparticles (pβCyD NPs) was investigated in neutral aqueous medium by means of solubility phase diagrams, circular dichroism (CD) and UV-vis absorption and compared with the corresponding βCyD monomer...
May 22, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28545652/using-quality-improvement-to-increase-human-milk-use-for-preterm-infants
#7
Margaret G Parker, Aloka L Patel
This review will provide an overview of quality improvement methods that have been used to improve human milk use (mother's own milk and donor milk) for very low-birth-weight infants in the hospital setting in the last decade. We will review the following: (1) evidence-based practices known to increase mother's own milk for very low-birth-weight infants; (2) individual hospitals with exemplary lactation programs and past and current US-based statewide quality improvement collaboratives focused on increasing mother's own milk; and (3) existing quality metrics for human milk and gaps in metrics...
May 23, 2017: Seminars in Perinatology
https://www.readbyqxmd.com/read/28545236/thermal-characterization-of-dynamic-silicon-cantilever-array-sensors-by-digital-holographic-microscopy
#8
Marjan Zakerin, Antonin Novak, Masaya Toda, Yves Emery, Filipe Natalio, Hans-Jürgen Butt, Rüdiger Berger
In this paper, we apply a digital holographic microscope (DHM) in conjunction with stroboscopic acquisition synchronization. Here, the temperature-dependent decrease of the first resonance frequency (S₁(T)) and Young's elastic modulus (E₁(T)) of silicon micromechanical cantilever sensors (MCSs) are measured. To perform these measurements, the MCSs are uniformly heated from T₀ = 298 K to T = 450 K while being externally actuated with a piezo-actuator in a certain frequency range close to their first resonance frequencies...
May 23, 2017: Sensors
https://www.readbyqxmd.com/read/28545232/sensors-and-actuators-on-determining-parameters-for-being-considered-in-selection-of-elastomers-for-biomimetic-hands
#9
Vlad Cârlescu, Dumitru N Olaru, Gheorghe Prisăcaru, Cezar Oprişan, José Machado
In this paper, the authors present a new methodology to study the viscoelastic behaviour of the human finger. The methodology is based on experimental research consisting of a finger's indentation with a small steel cylindrical object for various indentation speeds. The tests were realized on a CETR UMT-2 Tribometer for indentation speed between 0.02 mm/s and 4 mm/s with a normal load of up to 22 N. Using the force-deformation diagrams recorded at the smallest indentation speed determined the elastic modulus of the human finger according to an adapted Hertzian model...
May 23, 2017: Sensors
https://www.readbyqxmd.com/read/28541928/temperature-probing-and-emission-color-tuning-by-morphology-and-size-control-of-upconverting-%C3%AE-nayb0-67gd0-30f4-tm0-015-ho0-015-nanoparticles
#10
Emille M Rodrigues, Diogo A Gálico, Italo O Mazali, Fernando A Sigoli
The chemical composition, shape and size of upconverting nanoparticles are known to have a great influence on their spectroscopic properties, such as the emission color and the emission intensity variation as a function of temperature. This work shows the color tuning and the thermal sensitivity of NaYb0.67Gd0.30F4:Tm0.015:Ho0.015 nanoparticles synthesized by two different approaches of the same synthetic method showing the influence of size and morphology, 250 nm hexagonal-plated and 30 nm spheroidal nanoparticles, on the visible upconversion color under NIR irradiation...
May 25, 2017: Methods and Applications in Fluorescence
https://www.readbyqxmd.com/read/28535589/water-soluble-organic-aerosols-in-indo-gangetic-plain-igp-insights-from-aerosol-mass-spectrometry
#11
Abhishek Chakraborty, Pradhi Rajeev, Prashant Rajput, Tarun Gupta
Filter samples collected during winter of 2015-16 from two polluted urban locations (Allahabad and Kanpur) residing within Indo-Gangetic plain (IGP) showed high levels of water-soluble organic aerosols (WSOA). Total organic aerosols (OA) in submicron fraction, measured at Kanpur in real time via Aerosol Mass Spectrometer also showed substantially high concentration levels. WSOA to OA contribution in Kanpur was found to be very high (around 55%) indicating significant contributions from secondary OA (SOA). On average, WSOA oxidation ratio (O/C) was found to be higher (15-20%) in Kanpur than at Allahabad...
May 19, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28535555/paresthesia-independence-an-assessment-of-technical-factors-related-to-10-khz-paresthesia-free-spinal-cord-stimulation
#12
Giuliano De Carolis, Mery Paroli, Lara Tollapi, Matthew W Doust, Abram H Burgher, Cong Yu, Thomas Yang, Donna M Morgan, Kasra Amirdelfan, Leonardo Kapural, B Todd Sitzman, Richard Bundschu, Ricardo Vallejo, Ramsin M Benyamin, Thomas L Yearwood, Bradford E Gliner, Ashley A Powell, Kerry Bradley
BACKGROUND: Spinal cord stimulation (SCS) has been successfully used to treat chronic intractable pain for over 40 years. Successful clinical application of SCS is presumed to be generally dependent on maximizing paresthesia-pain overlap; critical to achieving this is positioning of the stimulation field at the physiologic midline. Recently, the necessity of paresthesia for achieving effective relief in SCS has been challenged by the introduction of 10 kHz paresthesia-free stimulation...
May 2017: Pain Physician
https://www.readbyqxmd.com/read/28535461/raman-spectroscopic-study-of-cyclohexane-at-pressures-below-1000mpa
#13
Erwei Qiao, Haifei Zheng
At present, the room temperature freezing pressure of cyclohexane is still uncertain, and the phase transition pressure of solid I - solid III is not reliable at ambient temperature. In this work, we have performed a Raman spectroscopic study of cyclohexane in a Moissanite anvil cell at pressures below 1000MPa at 25°C, and analyzed the characteristic of Raman brands νs(CH2), νas(CH2) and νb(Ring). Two phase transition pressures 80MPa and 550MPa were determined by a quartz pressure gauge, and they are the room temperature freezing pressure of cyclohexane and the phase transition pressure of solid I to solid III, respectively...
May 16, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28534778/the-lloydrelaxer-an-approach-to-minimize-scaling-effects-for-multivariate-projections
#14
Dirk J Lehmann, Holger Theisel
Star Coordinates are a popular projection technique in order to analyze and to disclose characteristic patterns of multidimensional data. Unfortunately, the shape, appearance, and distribution of such patterns are strongly affected by the given scaling of the data and can mislead the projection-based data analysis. In an extreme case, patterns might be more related to the choice of scaling than to the data themselves. Thus, we present the LloydRelaxer : a tool to minimize scaling-based effects in Star Coordinates...
May 17, 2017: IEEE Transactions on Visualization and Computer Graphics
https://www.readbyqxmd.com/read/28534285/development-of-self-forming-doxorubicin-loaded-polymeric-depots-as-an-injectable-drug-delivery-system-for-liver-cancer-chemotherapy
#15
Pinunta Nittayacharn, Norased Nasongkla
The objective of this work was to develop self-forming doxorubicin-loaded polymeric depots as an injectable drug delivery system for liver cancer chemotherapy and studied the release profiles of doxorubicin (Dox) from different depot formulations. Tri-block copolymers of poly(ε-caprolactone), poly(D,L-lactide) and poly(ethylene glycol) named PLECs were successfully used as a biodegradable material to encapsulate Dox as the injectable local drug delivery system. Depot formation and encapsulation efficiency of these depots were evaluated...
July 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/28534043/familiarity-detection-is-an-intrinsic-property-of-cortical-microcircuits-with-bidirectional-synaptic-plasticity
#16
Xiaoyu Zhang, Han Ju, Trevor B Penney, Antonius M J VanDongen
Humans instantly recognize a previously seen face as "familiar." To deepen our understanding of familiarity-novelty detection, we simulated biologically plausible neural network models of generic cortical microcircuits consisting of spiking neurons with random recurrent synaptic connections. NMDA receptor (NMDAR)-dependent synaptic plasticity was implemented to allow for unsupervised learning and bidirectional modifications. Network spiking activity evoked by sensory inputs consisting of face images altered synaptic efficacy, which resulted in the network responding more strongly to a previously seen face than a novel face...
May 2017: ENeuro
https://www.readbyqxmd.com/read/28533467/the-current-and-future-state-of-animal-coloration-research
#17
REVIEW
John A Endler, Johanna Mappes
Animal colour patterns are a model system for understanding evolution because they are unusually accessible for study and experimental manipulation. This is possible because their functions are readily identifiable. In this final paper of the symposium we provide a diagram of the processes affecting colour patterns and use this to summarize their functions and put the other papers in a broad context. This allows us to identify significant 'holes' in the field that only become obvious when we see the processes affecting colour patterns, and their interactions, as a whole...
July 5, 2017: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/28532901/long-term-surveillance-of-zinc-implant-in-murine-artery-surprisingly-steady-biocorrosion-rate
#18
Adam Drelich, Shan Zhao, Roger J Guillory, Jaroslaw W Drelich, Jeremy Goldman
Metallic zinc implanted into the abdominal aorta of rats out to 6 months has been demonstrated to degrade while avoiding responses commonly associated with the restenosis of vascular implants. However, major questions remain regarding whether a zinc implant would ultimately passivate through the production of stable corrosion products or via a cell mediated fibrous encapsulation process that prevents the diffusion of critical reactants and products at the metal surface. Here, we have conducted clinically relevant long term in vivo studies in order to characterize late stage zinc implant biocorrosion behavior and products to address these critical questions...
May 19, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28532153/the-photochemical-reactivity-of-1-6-methano-10-annulene
#19
Laura Moroni, Marco Pagliai, Riccardo Chelli, Giangaetano Pietraperzia, Pier Remigio Salvi, Cristina Gellini
1,6-methano[10]annulene solutions into cyclohexane have been subjected to continuous and pulsed UV irradiation. Photolysis occurs in both cases, giving naphthalene as a minor and major product, respectively. The wavelength dependence of the reaction in solution indicates that the photochemical process occurs exciting 1,6-methano[10]annulene in the second and third singlet electronic excited states. The reaction kinetics has been determined under pulsed irradiation. From the time dependence of concentrations, along with the support of density functional theory calculations and early published data, two mechanisms are proposed for naphthalene production...
May 23, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28531326/relationship-among-establishment-durations-kin-relatedness-aggressiveness-and-distance-between-populations-of-eight-invasive-argentine-ant-hymenoptera-formicidae-supercolonies-in-japan
#20
K Sato, H Sakamoto, M Hirata, M Kidokoro-Kobayashi, M Ozaki, S Higashi, T Murakami
We investigated kin relatedness and kin-recognition abilities of the Argentine ant, Linepithema humile (Mayr), an invader from North America that has pervaded Japan for 20 yr, using genetic analyses and behavioral bioassays. From these data and interactions among factors, we formulated an eradication and management time-scale pattern diagram. Relatedness within a colony using microsatellite markers was effectively zero, whereas relatedness estimated by multilocus DNA fingerprinting markers was relatively high...
May 22, 2017: Journal of Economic Entomology
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