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https://www.readbyqxmd.com/read/29341781/valley-polarized-quantum-anomalous-hall-effect-in-ferrimagnetic-honeycomb-lattices
#1
Jian Zhou, Qiang Sun, Puru Jena
The valley-polarized quantum anomalous Hall effect (VP-QAHE), which combines valleytronics and topology in one material, is of significant fundamental and practical importance in condensed-matter physics and materials science. In previous model studies, VP-QAHE occurs under strong Rashba spin-orbit coupling (SOC), which is an extrinsic effect. Here, using a low energy k·p model, we propose a different mechanism of VP-QAHE by introducing an intrinsic staggered magnetic exchange field and develop a general picture of valley dependent band inversion in honeycomb lattice...
July 28, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/29341729/printing-non-euclidean-solids
#2
Giuseppe Zurlo, Lev Truskinovsky
Geometrically frustrated solids with a non-Euclidean reference metric are ubiquitous in biology and are becoming increasingly relevant in technological applications. Often they acquire a targeted configuration of incompatibility through the surface accretion of mass as in tree growth or dam construction. We use the mechanics of incompatible surface growth to show that geometrical frustration developing during deposition can be fine-tuned to ensure a particular behavior of the system in physiological (or working) conditions...
July 28, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/29341611/moving-boundary-truncated-grid-method-for-wave-packet-dynamics
#3
Tsung-Yen Lee, Chia-Chun Chou
The moving boundary truncated grid method is developed to significantly reduce the number of grid points required for wave packet propagation. The time-dependent Schrodinger equation (TDSE) and the imaginary time Schrodinger equation (ITSE) are integrated using an adaptive algorithm which economizes on the number of grid points. This method employs a variable number of grid points in the Eulerian frame (grid points fixed in space) and adaptively defines the boundaries of the truncated grid. The truncated grid method is first applied to the time integration of the TDSE for the photodissociation dynamics of NOCl and a three-dimensional quantum barrier scattering problem...
January 17, 2018: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/29340248/depth-and-range-dependent-variation-in-the-performance-of-aquatic-telemetry-systems-understanding-and-predicting-the-susceptibility-of-acoustic-tag-receiver-pairs-to-close-proximity-detection-interference
#4
Stephen R Scherrer, Brendan P Rideout, Giacomo Giorli, Eva-Marie Nosal, Kevin C Weng
Background: Passive acoustic telemetry using coded transmitter tags and stationary receivers is a popular method for tracking movements of aquatic animals. Understanding the performance of these systems is important in array design and in analysis. Close proximity detection interference (CPDI) is a condition where receivers fail to reliably detect tag transmissions. CPDI generally occurs when the tag and receiver are near one another in acoustically reverberant settings. Here we confirm transmission multipaths reflected off the environment arriving at a receiver with sufficient delay relative to the direct signal cause CPDI...
2018: PeerJ
https://www.readbyqxmd.com/read/29340241/risk-factors-for-osteoporosis-in-male-patients-with-chronic-obstructive-pulmonary-disease-in-taiwan
#5
Chu-Hsu Lin, Kai-Hua Chen, Chien-Min Chen, Chia-Hao Chang, Tung-Jung Huang, Chia-Hung Lin
Objective: To investigate the risk factors for osteoporosis in male Taiwanese patients with chronic obstructive pulmonary disease (COPD). Methods: This cross-sectional study evaluated male COPD outpatients and age-matched male subjects at a regional teaching hospital. The following data were obtained and analyzed: bone mineral density of the lumbar spine and hip on dual-energy X-ray absorptiometry, demographic characteristics, questionnaire interview results, pulmonary function test results, chest posterior-anterior radiographic findings, and biochemical and high-sensitivity C-reactive protein (hs-CRP) levels...
2018: PeerJ
https://www.readbyqxmd.com/read/29340240/refining-amino-acid-hydrophobicity-for-dynamics-simulation-of-membrane-proteins
#6
Ronald D Hills
Coarse-grained (CG) models have been successful in simulating the chemical properties of lipid bilayers, but accurate treatment of membrane proteins and lipid-protein molecular interactions remains a challenge. The CgProt force field, original developed with the multiscale coarse graining method, is assessed by comparing the potentials of mean force for sidechain insertion in a DOPC bilayer to results reported for atomistic molecular dynamics simulations. Reassignment of select CG sidechain sites from the apolar to polar site type was found to improve the attractive interfacial behavior of tyrosine, phenylalanine and asparagine as well as charged lysine and arginine residues...
2018: PeerJ
https://www.readbyqxmd.com/read/29339687/subclinical-left-ventricular-systolic-dysfunction-in-patients-with-severe-aortic-stenosis-a-speckle-tracking-echocardiography-study
#7
Betül Cengiz, Şükrü Taylan Şahin, Selen Yurdakul, Serkan Kahraman, Ayşen Bozkurt, Saide Aytekin
OBJECTIVE: In patients with aortic stenosis (AS), the left ventricular (LV) geometry changes due to the increased LV afterload. However, subclinical myocardial dysfunction can develop despite a normal LV ejection fraction (EF). This study was an investigation of subclinical LV systolic dysfunction in patients with severe AS with a normal LV EF using a strain imaging method, speckle-tracking echocardiography (STE), and an evaluation of its correlation with novel indices to assess the severity of AS...
January 2018: Türk Kardiyoloji Derneği Arşivi: Türk Kardiyoloji Derneğinin Yayın Organıdır
https://www.readbyqxmd.com/read/29339612/industrial-wastewater-treatment-with-a-bioelectrochemical-process-assessment-of-depuration-efficiency-and-energy-production
#8
Daniele Molognoni, Stefania Chiarolla, Daniele Cecconet, Arianna Callegari, Andrea G Capodaglio
Development of renewable energy sources, efficient industrial processes, energy/chemicals recovery from wastes are research issues that are quite contemporary. Bioelectrochemical processes represent an eco-innovative technology for energy and resources recovery from both domestic and industrial wastewaters. The current study was conducted to: (i) assess bioelectrochemical treatability of industrial (dairy) wastewater by microbial fuel cells (MFCs); (ii) determine the effects of the applied organic loading rate (OLR) on MFC performance; (iii) identify factors responsible for reactor energy recovery losses (i...
January 2018: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/29339598/design-parameter-estimations-for-adjustable-bubble-size-in-bubble-generating-system
#9
Tschung-Il Kim, Hyunju Park, Mooyoung Han
In this study, we developed a customized low cost and low energy bubble generator that can control bubble size. Hence, it can be used not only in the water treatment process but also in various other processes. This device was able to generate bubbles with a very simple system using only a general pump and a mixing chamber. Increasing the number of partition walls in the mixing chamber reduced the bubble size. Furthermore, bubbles of a few hundred nanometers were produced by the shear stress caused by increasing the thickness of the partition wall...
January 2018: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/29339333/coral-reefs-for-coastal-protection-a-new-methodological-approach-and-engineering-case-study-in-grenada
#10
Borja G Reguero, Michael W Beck, Vera N Agostini, Philip Kramer, Boze Hancock
Coastal communities in tropical environments are at increasing risk from both environmental degradation and climate change and require urgent local adaptation action. Evidences show coral reefs play a critical role in wave attenuation but relatively little direct connection has been drawn between these effects and impacts on shorelines. Reefs are rarely assessed for their coastal protection service and thus not managed for their infrastructure benefits, while widespread damage and degradation continues. This paper presents a systematic approach to assess the protective role of coral reefs and to examine solutions based on the reef's influence on wave propagation patterns...
January 12, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29337367/correlation-of-simulation-finite-element-analysis-to-the-separation-of-intrinsically-magnetic-spores-and-red-blood-cells-using-a-microfluidic-magnetic-deposition-system
#11
Jianxin Sun, L Moore, Wei Xue, James Kim, Maciej Zborowski, Jeffrey J Chalmers
Magnetic separation of cells has been, and continues to be, widely used in a variety of applications, ranging from healthcare diagnostics to detection of food contamination. Typical, these technologies require cells labeled with antibody magnetic particle conjugate and a high magnetic energy gradient created in the flow containing the labeled cells (i.e. a column packed with magnetically inducible material), or dense packing of magnetic particles next to the flow cell. Such designs while creating high magnetic energy gradients, are not amenable to easy, highly detailed, mathematic characterization...
January 16, 2018: Biotechnology and Bioengineering
https://www.readbyqxmd.com/read/29336868/the-therapeutic-potential-of-targeting-the-peripheral-endocannabinoid-cb1-receptor-system
#12
REVIEW
Joseph Tam, Liad Hinden, Adi Drori, Shiran Udi, Shahar Azar, Saja Baraghithy
Endocannabinoids (eCBs) are internal lipid mediators recognized by the cannabinoid-1 and -2 receptors (CB1R and CB2R, respectively), which also mediate the different physiological effects of marijuana. The endocannabinoid system, consisting of eCBs, their receptors, and the enzymes involved in their biosynthesis and degradation, is present in a vast number of peripheral organs. In this review we describe the role of the eCB/CB1R system in modulating the metabolism in several peripheral organs. We assess how eCBs, via activating the CB1R, contribute to obesity and regulate food intake...
January 11, 2018: European Journal of Internal Medicine
https://www.readbyqxmd.com/read/29335642/controlled-dynamic-screening-of-excitonic-complexes-in-2d-semiconductors
#13
Andrey R Klots, Benjamin Weintrub, Dhiraj Prasai, Daniel Kidd, Kalman Varga, Kirill A Velizhanin, Kirill I Bolotin
We report a combined theoretical/experimental study of dynamic screening of excitons in media with frequency-dependent dielectric functions. We develop an analytical model showing that interparticle interactions in an exciton are screened in the range of frequencies from zero to the characteristic binding energy depending on the symmetries and transition energies of that exciton. The problem of the dynamic screening is then reduced to simply solving the Schrodinger equation with an effectively frequency-independent potential...
January 15, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29334340/identification-of-anti-filarial-leads-against-aspartate-semialdehyde-dehydrogenase-of-wolbachia-endosymbiont-of-brugia-malayi-combined-molecular-docking-and-molecular-dynamics-approaches
#14
Dhamodharan Prabhu, Sundaraj Rajamanikandan, Mathimaran Amala, Surekha Kanagarajan, Jeyaraman Jeyakanthan
Lymphatic filariasis is a debilitating vector borne parasitic disease that infects human lymphatic system by nematode Brugia malayi. Currently available anti-filarial drugs are effective only on the larval stages of parasite. So far, no effective drugs are available for humans to treat filarial infections. In this regard, aspartate semialdehyde dehydrogenase (ASDase) in lysine biosynthetic pathway from Wolbachia endosymbiont Brugia malayi represents an attractive therapeutic target for the development of novel anti-filarial agents...
January 15, 2018: Journal of Biomolecular Structure & Dynamics
https://www.readbyqxmd.com/read/29333735/hot-electron-assisted-femtosecond-all-optical-modulation-in-plasmonics
#15
Mohammad Taghinejad, Hossein Taghinejad, Zihao Xu, Yawei Liu, Sean P Rodrigues, Kyu-Tae Lee, Tianquan Lian, Ali Adibi, Wenshan Cai
The optical Kerr nonlinearity of plasmonic metals provides enticing prospects for developing reconfigurable and ultracompact all-optical modulators. In nanostructured metals, the coherent coupling of light energy to plasmon resonances creates a nonequilibrium electron distribution at an elevated electron temperature that gives rise to significant Kerr optical nonlinearities. Although enhanced nonlinear responses of metals facilitate the realization of efficient modulation devices, the intrinsically slow relaxation dynamics of the photoexcited carriers, primarily governed by electron-phonon interactions, impedes ultrafast all-optical modulation...
January 15, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29333661/nanocage-therapeutics-prevailing-phagocytosis-and-immunogenic-cell-death-awakens-immunity-against-cancer
#16
Eun Jung Lee, Gi-Hoon Nam, Na Kyeong Lee, Minwoo Kih, Eunee Koh, Yoon Kyoung Kim, Yeonsun Hong, Soyoun Kim, Seung-Yoon Park, Cherlhyun Jeong, Yoosoo Yang, In-San Kim
A growing appreciation of the relationship between the immune system and the tumorigenesis has led to the development of strategies aimed at "re-editing" the immune system to kill tumors. Here, a novel tactic is reported for overcoming the activation-energy threshold of the immunosuppressive tumor microenvironment and mediating the delivery and presentation of tumor neoantigens to the host's immune system. This nature-derived nanocage not only efficiently presents ligands that enhance cancer cell phagocytosis, but also delivers drugs that induce immunogenic cancer cell death...
January 15, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29333574/unique-metabolic-activation-of-adipose-tissue-macrophages-in-obesity-promotes-inflammatory-responses
#17
Lily Boutens, Guido J Hooiveld, Sourabh Dhingra, Robert A Cramer, Mihai G Netea, Rinke Stienstra
AIMS/HYPOTHESIS: Recent studies have identified intracellular metabolism as a fundamental determinant of macrophage function. In obesity, proinflammatory macrophages accumulate in adipose tissue and trigger chronic low-grade inflammation, that promotes the development of systemic insulin resistance, yet changes in their intracellular energy metabolism are currently unknown. We therefore set out to study metabolic signatures of adipose tissue macrophages (ATMs) in lean and obese conditions...
January 14, 2018: Diabetologia
https://www.readbyqxmd.com/read/29333470/history-and-perspectives-of-nuclear-medicine-in-myanmar
#18
Win Mar
Nuclear Medicine was established in Myanmar in 1963 by Dr Soe Myint and International Atomic Energy expert Dr R. Hochel at Yangon General Hospital. Nuclear medicine diagnostic and therapeutic services started with Probe Scintillation Detector Systems and rectilinear scanner. In the early stage, many Nuclear Medicine specialists from the International Atomic Energy Agency (IAEA) spent some time in Myanmar and made significant contributions to the development of Nuclear Medicine in our country. The department participated in various IAEA technical cooperation projects and regional cooperation projects...
2018: Asia Oceania Journal of Nuclear Medicine & Biology
https://www.readbyqxmd.com/read/29331915/theory-of-water-treatment-by-capacitive-deionization-with-redox-active-porous-electrodes
#19
Fan He, P M Biesheuvel, Martin Z Bazant, T Alan Hatton
Capacitive deionization (CDI) for water treatment, which relies on the capture of charged species to sustain the electrical double layers (EDLs) established within porous electrodes under an applied electrical potential, can be enhanced by the chemical attachment of fixed charged groups to the porous electrode electrodes (ECDI). It has recently been demonstrated that further improvements in capacity and energy storage can be gained by functionalization of the electrode surfaces with redox polymers in which the charge on the electrodes can be modulated through Faradaic reactions under different cell voltages in a capacitive process that can be called "Faradaic CDI" (FaCDI)...
January 3, 2018: Water Research
https://www.readbyqxmd.com/read/29331827/pilot-scale-outdoor-photobioreactor-culture-of-the-marine-dinoflagellate-karlodinium-veneficum-production-of-a-karlotoxins-rich-extract
#20
L López-Rosales, A Sánchez-Mirón, F García-Camacho, A R Place, Yusuf Chisti, E Molina-Grima
A pilot-scale bioprocess was developed for the production of karlotoxin-enriched extracts of the marine algal dinoflagellate Karlodinium veneficum. A bubble column and a flat-panel photobioreactors (80-281 L) were used for comparative assessment of growth. Flow hydrodynamics and energy dissipation rates (EDR) in the bioreactors were characterized through robust computational fluid dynamic simulations. All cultures were conducted monoseptically outdoors. Bubble column (maximum cell productivity in semicontinuous operation of 58 × 103 cell mL-1 day-1) proved to be a better culture system for this alga...
December 30, 2017: Bioresource Technology
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