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https://www.readbyqxmd.com/read/29665487/application-of-the-kinetic-and-isotherm-models-for-better-understanding-of-the-behaviors-of-silver-nanoparticles-adsorption-onto-different-adsorbents
#1
REVIEW
Achmad Syafiuddin, Salmiati Salmiati, Jonbi Jonbi, Mohamad Ali Fulazzaky
It is the first time to do investigation the reliability and validity of thirty kinetic and isotherm models for describing the behaviors of adsorption of silver nanoparticles (AgNPs) onto different adsorbents. The purpose of this study is therefore to assess the most reliable models for the adsorption of AgNPs onto feasibility of an adsorbent. The fifteen kinetic models and fifteen isotherm models were used to test secondary data of AgNPs adsorption collected from the various data sources. The rankings of arithmetic mean were estimated based on the six statistical analysis methods of using a dedicated software of the MATLAB Optimization Toolbox with a least square curve fitting function...
April 14, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29663322/quantitatively-characterizing-drug-induced-arrhythmic-contractile-motions-of-human-stem-cell-derived-cardiomyocytes
#2
Plansky Hoang, Nathaniel Huebsch, Shin Hyuk Bang, Brian A Siemons, Bruce R Conklin, Kevin E Healy, Zhen Ma, Sabir Jacquir
Quantification of abnormal contractile motions of cardiac tissue has been a noteworthy challenge and significant limitation in assessing and classifying the drug-induced arrhythmias (i.e. Torsades de pointes). To overcome these challenges, researchers have taken advantage of computational image processing tools to measure contractile motion from cardiomyocytes derived from human induced pluripotent stem cells (hiPSC-CMs). However, the amplitude and frequency analysis of contractile motion waveforms doesn't produce sufficient information to objectively classify the degree of variations between two or more sets of cardiac contractile motions...
April 16, 2018: Biotechnology and Bioengineering
https://www.readbyqxmd.com/read/29659769/landscape-context-affects-aphid-parasitism-by-lysiphlebus-testaceipes-hymenoptera-aphidiinae-in-wheat-fields
#3
Norman C Elliott, Michael J Brewer, Kristopher L Giles
Winter wheat is Oklahoma's most widely grown crop, and is planted during September and October, grows from fall through spring, and is harvested in June. Winter wheat fields are typically interspersed in a mosaic of habitats in other uses, and we hypothesized that the spatial and temporal composition and configuration of landscape elements, which contribute to agroecosystem diversity also influence biological control of common aphid pests. The parasitoid Lysiphlebus testaceipes (Cresson; Hymenoptera: Aphidiinae) is highly effective at reducing aphid populations in wheat in Oklahoma, and though a great deal is known about the biology and ecology of L...
April 12, 2018: Environmental Entomology
https://www.readbyqxmd.com/read/29644628/quantitatively-characterizing-drug-induced-arrhythmic-contractile-motions-of-human-stem-cell-derived-cardiomyocytes
#4
Plansky Hoang, Nathaniel Huebsch, Shin Hyuk Bang, Brian A Siemons, Bruce R Conklin, Kevin E Healy, Zhen Ma, Sabir Jacquir
Quantification of abnormal contractile motions of cardiac tissue has been a noteworthy challenge and significant limitation in assessing and classifying the drug-induced arrhythmias (i.e. Torsades de pointes). To overcome these challenges, researchers have taken advantage of computational image processing tools to measure contractile motion from cardiomyocytes derived from human induced pluripotent stem cells (hiPSC-CMs). However, the amplitude and frequency analysis of contractile motion waveforms doesn't produce sufficient information to objectively classify the degree of variations between two or more sets of cardiac contractile motions...
April 12, 2018: Biotechnology and Bioengineering
https://www.readbyqxmd.com/read/29617565/generalized-electrodiffusion-equation-with-fractality-of-space-time-theory-and-application
#5
Petro Kostrobij, Ivan Grygorchak, Fedir Ivashchyshyn, Bohdan Markovych, Oleksandra Viznovych, Myhajlo Tokarchuk
Physical and technological principles of formation of clathrate structures for supramolecular electronics are given in this paper. It has been established that supramolecular nature of the ``host--guest'' conjunction, in general, and hierarchical architecture of the corresponding clathrates, in particular, provide realization of such an extraordinary effect as an optically or a magnetically controlled phenomenon of colossal ``negative capacity'' with a predicted frequency interval of manifestation, magnitude, and multiplicity...
April 4, 2018: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/29615717/age-is-reflected-in-the-fractal-dimensionality-of-mri-diffusion-based-tractography
#6
Gernot Reishofer, Fritz Studencnik, Karl Koschutnig, Hannes Deutschmann, Helmut Ahammer, Guilherme Wood
Fractal analysis is a widely used tool to analyze the geometrical complexity of biological structures. The geometry of natural objects such as plants, clouds, cellular structures, blood vessel, and many others cannot be described sufficiently with Euclidian geometric properties, but can be represented by a parameter called the fractal dimension. Here we show that a specific estimate of fractal dimension, the correlation dimension, is able to describe changes in the structural complexity of the human brain, based on data from magnetic resonance diffusion imaging...
April 3, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29608847/crystallization-induced-morphological-tuning-towards-denim-like-graphene-nanosheets-in-a-kcl-copolymer-solution
#7
Yaxin Chen, Liluo Shi, Qiong Yuan, Ang Li, Shaozhuan Huang, Hui Ying Yang, Xiaohong Chen, Jisheng Zhou, Huaihe Song
Although nucleation and crystallization in solution-processed materials synthesis is a natural phenomenon, the morphology design of graphene nanosheets by controlling the dual crystallization has not been established. In this work, we systematically demonstrate how the dual crystallization of ice and potassium chloride induces the morphological variation of the freeze-dried scaffold from fractal structure towards stepped sheet-like structure. Denim-like graphene nanosheet (DGNS) has been fabricated by annealing the F127-coated stepped sheet-like scaffold in nitrogen...
April 2, 2018: ACS Nano
https://www.readbyqxmd.com/read/29577071/temporal-fractals-in-movies-and-mind
#8
James E Cutting, Jordan E DeLong, Kaitlin L Brunick
Fractal patterns are seemingly everywhere. They can be analyzed through Fourier and power analyses, and other methods. Cutting, DeLong, and Nothelfer (2010) analyzed as time-series data the fluctuations of shot durations in 150 popular movies released over 70 years. They found that these patterns had become increasingly fractal-like and concluded that they might be linked to those found in the results of psychological tasks involving attention. To explore this possibility further, we began by analyzing the shot patterns of almost twice as many movies released over a century...
2018: Cognitive Research: Principles and Implications
https://www.readbyqxmd.com/read/29489458/template-mediated-protein-self-assembly-as-a-valuable-tool-in-regenerative-therapy
#9
Banani Kundu, Mohamed R Eltohamy, Vamsi K Yadavalli, Rui Luis Reis, Hae-Won Kim
The assembly of natural proteinaceous biopolymers into macro-scale architectures is of great importance in synthetic biology, soft-material science and regenerative therapy. The self-assembly of protein tends to be limited due to anisotropic interactions among protein molecules, poor solubility and stability. Here, we introduce a unique platform to self-immobilize diverse proteins (fibrous and globular, positively and negatively charged, low and high molecular weight) using silicon surfaces with pendant -NH2 groups via a facile one step diffusion limited aggregation (DLA) method...
February 28, 2018: Biomedical Materials
https://www.readbyqxmd.com/read/29443966/global-patterns-of-tropical-forest-fragmentation
#10
Franziska Taubert, Rico Fischer, Jürgen Groeneveld, Sebastian Lehmann, Michael S Müller, Edna Rödig, Thorsten Wiegand, Andreas Huth
Remote sensing enables the quantification of tropical deforestation with high spatial resolution. This in-depth mapping has led to substantial advances in the analysis of continent-wide fragmentation of tropical forests. Here we identified approximately 130 million forest fragments in three continents that show surprisingly similar power-law size and perimeter distributions as well as fractal dimensions. Power-law distributions have been observed in many natural phenomena such as wildfires, landslides and earthquakes...
February 14, 2018: Nature
https://www.readbyqxmd.com/read/29364649/architectonics-design-of-molecular-architecture-for-functional-applications
#11
M B Avinash, Thimmaiah Govindaraju
The term architectonics has its roots in the architectural and philosophical (as early as 1600s) literature that refers to "the theory of structure" and "the structure of theory", respectively. The concept of architectonics has been adapted to advance the field of molecular self-assembly and termed as molecular architectonics. In essence, the methodology of organizing molecular units in the required and controlled configurations to develop advanced functional systems for materials and biological applications comprises the field of molecular architectonics...
February 20, 2018: Accounts of Chemical Research
https://www.readbyqxmd.com/read/29350187/multifractal-dynamics-of-resting-state-functional-connectivity-in-the-prefrontal-cortex
#12
Frigyes Samuel Racz, Peter Mukli, Zoltan Nagy, Andras Eke
Brain function is organized as a network of functional connections between different neuronal populations with connection strengths dynamically changing in time and space. Studies investigating functional connectivity (FC) usually follow a static approach when describing FC by considering the connectivity strengths constant, however a dynamic approach seems more reasonable, as this way the spatio-temporal dynamics of the underlying system can also be captured. OBJECTIVE: The scale-free, i...
February 28, 2018: Physiological Measurement
https://www.readbyqxmd.com/read/29347787/direct-determination-approach-for-the-multifractal-detrending-moving-average-analysis
#13
Hai-Chuan Xu, Gao-Feng Gu, Wei-Xing Zhou
In the canonical framework, we propose an alternative approach for the multifractal analysis based on the detrending moving average method (MF-DMA). We define a canonical measure such that the multifractal mass exponent τ(q) is related to the partition function and the multifractal spectrum f(α) can be directly determined. The performances of the direct determination approach and the traditional approach of the MF-DMA are compared based on three synthetic multifractal and monofractal measures generated from the one-dimensional p-model, the two-dimensional p-model, and the fractional Brownian motions...
November 2017: Physical Review. E
https://www.readbyqxmd.com/read/29347592/diffusion-subdiffusion-and-localization-of-active-colloids-in-random-post-lattices
#14
Alexandre Morin, David Lopes Cardozo, Vijayakumar Chikkadi, Denis Bartolo
Combining experiments and theory, we address the dynamics of self-propelled particles in crowded environments. We first demonstrate that motile colloids cruising at constant speed through random lattices undergo a smooth transition from diffusive to subdiffusive to localized dynamics upon increasing the obstacle density. We then elucidate the nature of these transitions by performing extensive simulations constructed from a detailed analysis of the colloid-obstacle interactions. We evidence that repulsion at a distance and hard-core interactions both contribute to slowing down the long-time diffusion of the colloids...
October 2017: Physical Review. E
https://www.readbyqxmd.com/read/29347559/how-anisotropy-beats-fractality-in-two-dimensional-on-lattice-diffusion-limited-aggregation-growth
#15
Denis S Grebenkov, Dmitry Beliaev
We study the fractal structure of diffusion-limited aggregation (DLA) clusters on a square lattice by extensive numerical simulations (with clusters having up to 10^{8} particles). We observe that DLA clusters undergo strongly anisotropic growth, with the maximal growth rate along the axes. The naive scaling limit of a DLA cluster by its diameter is thus deterministic and one-dimensional. At the same time, on all scales from the particle size to the size of the entire cluster it has a nontrivial box-counting fractal dimension which corresponds to the overall growth rate, which, in turn, is smaller than the growth rate along the axes...
October 2017: Physical Review. E
https://www.readbyqxmd.com/read/29347273/additive-scaling-law-for-structural-organization-of-chromatin-in-chicken-erythrocyte-nuclei
#16
E G Iashina, E V Velichko, M V Filatov, W G Bouwman, C P Duif, A Brulet, S V Grigoriev
Small-angle neutron scattering (SANS) on nuclei of chicken erythrocytes demonstrates the cubic dependence of the scattering intensity Q^{-3} in the range of momentum transfer Q∈10^{-3}-10^{-2}nm^{-1}. Independent spin-echo SANS measurements give the spin-echo function, which is well described by the exponential law in a range of sizes (3×10^{2})-(3×10^{4}) nm. Both experimental dependences reflect the nature of the structural organization of chromatin in the nucleus of a living cell, which corresponds to the correlation function γ(r)=ln(ξ/r) for r<ξ, where ξ=(3...
July 2017: Physical Review. E
https://www.readbyqxmd.com/read/29347113/counting-statistics-of-chaotic-resonances-at-optical-frequencies-theory-and-experiments
#17
Domenico Lippolis, Li Wang, Yun-Feng Xiao
A deformed dielectric microcavity is used as an experimental platform for the analysis of the statistics of chaotic resonances, in the perspective of testing fractal Weyl laws at optical frequencies. In order to surmount the difficulties that arise from reading strongly overlapping spectra, we exploit the mixed nature of the phase space at hand, and only count the high-Q whispering-gallery modes (WGMs) directly. That enables us to draw statistical information on the more lossy chaotic resonances, coupled to the high-Q regular modes via dynamical tunneling...
July 2017: Physical Review. E
https://www.readbyqxmd.com/read/29324784/multiscale-modelling-of-blood-flow-in-cerebral-microcirculation-details-at-capillary-scale-control-accuracy-at-the-level-of-the-cortex
#18
Myriam Peyrounette, Yohan Davit, Michel Quintard, Sylvie Lorthois
Aging or cerebral diseases may induce architectural modifications in human brain microvascular networks, such as capillary rarefaction. Such modifications limit blood and oxygen supply to the cortex, possibly resulting in energy failure and neuronal death. Modelling is key in understanding how these architectural modifications affect blood flow and mass transfers in such complex networks. However, the huge number of vessels in the human brain-tens of billions-prevents any modelling approach with an explicit architectural representation down to the scale of the capillaries...
2018: PloS One
https://www.readbyqxmd.com/read/29280979/perturbation-theory-for-scattering-from-multilayers-with-randomly-rough-fractal-interfaces-remote-sensing-applications
#19
Pasquale Imperatore, Antonio Iodice, Daniele Riccio
A general, approximate perturbation method, able to provide closed-form expressions of scattering from a layered structure with an arbitrary number of rough interfaces, has been recently developed. Such a method provides a unique tool for the characterization of radar response patterns of natural rough multilayers. In order to show that, here, for the first time in a journal paper, we describe the application of the developed perturbation theory to fractal interfaces; we then employ the perturbative method solution to analyze the scattering from real-world layered structures of practical interest in remote sensing applications...
December 27, 2017: Sensors
https://www.readbyqxmd.com/read/29259083/extracellular-dna-and-type-iv-pilus-expression-regulate-the-structure-and-kinetics-of-biofilm-formation-by-nontypeable-haemophilus-influenzae
#20
Jayajit Das, Elaine Mokrzan, Vinal Lakhani, Lucia Rosas, Joseph A Jurcisek, William C Ray, Lauren O Bakaletz
Biofilms formed in the middle ear by nontypeable Haemophilus influenzae (NTHI) are central to the chronicity, recurrence, and refractive nature of otitis media (OM). However, mechanisms that underlie the emergence of specific NTHI biofilm structures are unclear. We combined computational analysis tools and in silico modeling rooted in statistical physics with confocal imaging of NTHI biofilms formed in vitro during static culture in order to identify mechanisms that give rise to distinguishing morphological features...
December 19, 2017: MBio
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