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https://www.readbyqxmd.com/read/28524686/anomalous-thermal-conductivity-and-magnetic-torque-response-in-the-honeycomb-magnet-%C3%AE-rucl_-3
#1
Ian A Leahy, Christopher A Pocs, Peter E Siegfried, David Graf, S-H Do, Kwang-Yong Choi, B Normand, Minhyea Lee
We report on the unusual behavior of the in-plane thermal conductivity κ and torque τ response in the Kitaev-Heisenberg material α-RuCl_{3}. κ shows a striking enhancement with linear growth beyond H=7  T, where magnetic order disappears, while τ for both of the in-plane symmetry directions shows an anomaly at the same field. The temperature and field dependence of κ are far more complex than conventional phonon and magnon contributions, and require us to invoke the presence of unconventional spin excitations whose properties are characteristic of a field-induced spin-liquid phase related to the enigmatic physics of the Kitaev model in an applied magnetic field...
May 5, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28522669/liquid-embolic-agents-for-endovascular-embolization-evaluation-of-an-established-onyx-and-a-novel-phil-embolic-agent-in-an-in-vitro-avm-model
#2
D F Vollherbst, C M Sommer, C Ulfert, J Pfaff, M Bendszus, M A Möhlenbruch
BACKGROUND AND PURPOSE: Embolization plays a key role in the treatment of arteriovenous malformations. The aim of this study was to evaluate an established (Onyx) and a novel (precipitating hydrophobic injectable liquid [PHIL]) liquid embolic agent in an in vitro AVM model. MATERIALS AND METHODS: An AVM model was integrated into a circuit system. The artificial nidus (subdivided into 28 honeycomb-like sections) was embolized with Onyx 18 (group Onyx; n = 8) or PHIL 25 (group PHIL; n = 8) with different pause times between the injections (30 and 60 seconds, n = 4 per study group) by using a 1...
May 18, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28507711/interfacial-engineering-of-renewable-metal-organic-framework-derived-honeycomb-like-nanoporous-aluminum-hydroxide-with-tunable-porosity
#3
Ye-Tang Pan, Lu Zhang, Xiaomin Zhao, De-Yi Wang
Novel honeycomb-like mesoporous aluminum hydroxide (pATH) was synthesized via a facile one-step reaction by employing ZIF-8 as a template. This self-decomposing template was removed automatically under acidic conditions without the need for any tedious or hazardous procedures. Meanwhile, the pore size of pATH was easily modulated by tuning the dimensions of the ZIF-8 polyhedrons. Of paramount importance was the fact that the dissolved ZIF-8 in solution was regenerated upon deprotonation of the ligand under mild alkali conditions, and was reused in the preparation of pATH, thus forming a delicate synthesis cycle...
May 1, 2017: Chemical Science
https://www.readbyqxmd.com/read/28506068/viologen-based-conjugated-covalent-organic-networks-via-zincke-reaction
#4
Gobinda Das, Tina Skorjanc, Sudhir Kumar Sharma, Felipe Gándara, Matteo Lusi, D S Shankar Rao, Sridurai Vimala, Subbarao Krishna Prasad, Jesus Raya, Dong Suk Han, Ramesh Jagannathan, John-Carl Olsen, Ali Trabolsi
Morphology influences the functionality of covalent organic networks and determines potential applica-tions. Here, we report for the first time the use of Zincke reaction to fabricate, under either solvothermal or microwave conditions, a viologen-linked covalent organic network in the form of hollow particles or nanosheets. The synthesized materials are stable in acidic, neutral and basic aqueous solutions. Under basic conditions, the neutral network as-sumes radical cationic character without decomposing or changing structure...
May 16, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28505791/driven-flow-with-exclusion-and-spin-dependent-transport-in-graphenelike-structures
#5
S L A de Queiroz, R B Stinchcombe
We present a simplified description for spin-dependent electronic transport in honeycomb-lattice structures with spin-orbit interactions, using generalizations of the stochastic nonequilibrium model known as the totally asymmetric simple exclusion process. Mean field theory and numerical simulations are used to study currents, density profiles, and current polarization in quasi-one-dimensional systems with open boundaries, and externally imposed particle injection (α) and ejection (β) rates. We investigate the influence of allowing for double site occupancy, according to Pauli's exclusion principle, on the behavior of the quantities of interest...
April 2017: Physical Review. E
https://www.readbyqxmd.com/read/28504264/absorptive-pinhole-collimators-for-ballistic-dirac-fermions-in-graphene
#6
Arthur W Barnard, Alex Hughes, Aaron L Sharpe, Kenji Watanabe, Takashi Taniguchi, David Goldhaber-Gordon
Ballistic electrons in solids can have mean free paths far larger than the smallest features patterned by lithography. This has allowed development and study of solid-state electron-optical devices such as beam splitters and quantum point contacts, which have informed our understanding of electron flow and interactions. Recently, high-mobility graphene has emerged as an ideal two-dimensional semimetal that hosts unique chiral electron-optical effects due to its honeycomb crystalline lattice. However, this chiral transport prevents the simple use of electrostatic gates to define electron-optical devices in graphene...
May 15, 2017: Nature Communications
https://www.readbyqxmd.com/read/28497504/semiconducting-coordination-polymers-based-on-the-pre-designed-ternary-te-fe-cu-carbonyl-cluster-and-conjugation-interrupted-dipyridyl-linkers
#7
Minghuey Shieh, Chia-Chi Yu, Chia-Yeh Miu, Chang-Hung Kung, Chung-Yi Huang, Yu-Hsin Liu, Hsiang-Lin Liu, Chih-Chiang Shen
A series of semiconducting cluster-incorporated Cu-based coordination polymers, namely, 1D zigzag polymers [[{TeFe3(CO)9Cu2}(L)]n (L = 1,2-bis(4-pyridyl)ethane (bpea), 1; L = 1,2-bis(4-pyridyl)ethylene (bpee), 5), 2D honeycomb-like polymers [{TeFe3(CO)9Cu}Cu(L)2.5]n (L = bpea, 2; L =bpee, 6), and 2D wave-like cation-anion polymer [{Cu2(L)4}{{TeFe3(CO)9Cu}2(L)}]n (L = 1,3-bis(4-pyridyl)propane (bpp), 4), as well as the macrocycle [{TeFe3(CO)9Cu2}2(bpp)2] (3) have been quantitatively synthesized via the liquid-assisted grinding from the pre-designed cluster [TeFe3(CO)9Cu2(MeCN)2] with conjugated or conjugation-interrupted dipyridyl linkers...
May 11, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28491175/mri-characteristics-of-primary-fallopian-tube-choriocarcinoma-a-case-report
#8
Hui-Ru Jia, Jing Zhang, You-Min Guo
Tubal choriocarcinoma is uncommon, and its magnetic resonance imaging characteristics have not yet been reported. In this report, a 39-year-old woman presented with irregular painless vaginal bleeding and a palpable left lower abdominal lump for 2 months following 6 weeks' amenorrhea and positive urine pregnancy test. Her serum β-human chorionic gonadotropin value was significantly increased. Ultrasound revealed a left adnexal mass, which showed no blood flow signal on Color doppler flow imaging. A further MR examination showed a well-defined cystic-solid mass with cystic component accounting for a large proportion in the left lower abdomen...
June 2017: Radiology case reports
https://www.readbyqxmd.com/read/28485915/formation-of-g-c3n4-ni-oh-2-honeycomb-nanostructure-and-asymmetric-supercapacitor-with-high-energy-and-power-density
#9
Bitao Dong, Mingyan Li, Sheng Chen, Dawei Ding, Wei Wei, Guoxin Gao, Shujiang Ding
Nickel hydroxide (Ni(OH)2) has drawn intense research interest due to its high theoretical specific capacitance as one of the promising next generation electrode materials for supercapacitors, however, the practical applications of Ni(OH)2 is hindered by its lower cycling life. To overcome the inherent defects, herein we demonstrate a unique interconnect honeycomb structure of g-C3N4 and Ni(OH)2 synthesized by an environmental-friendly one-step method. In this work, g-C3N4 support a perpendicular charge transporting direction in charge-discharge process, which is beneficial for electron diffusion...
May 9, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28472939/chronic-hypersensitivity-pneumonitis-identification-of-key-prognostic-determinants-using-automated-ct-analysis
#10
Joseph Jacob, Brian J Bartholmai, Ryoko Egashira, Anne Laure Brun, Srinivasan Rajagopalan, Ronald Karwoski, Maria Kokosi, David M Hansell, Athol U Wells
BACKGROUND: Chronic hypersensitivity pneumonitis (CHP) has a variable disease course. Computer analysis of CT features was used to identify a subset of CHP patients with an outcome similar to patients with idiopathic pulmonary fibrosis (IPF). METHODS: Consecutive patients with a multi-disciplinary team diagnosis of CHP (n = 116) had pulmonary function tests (FEV1, FVC, DLco, Kco, and a composite physiologic index [CPI]) and CT variables predictive of mortality evaluated by analysing visual and computer-based (CALIPER) parenchymal features: total interstitial lung disease (ILD) extent, honeycombing, reticular pattern, ground glass opacities, pulmonary vessel volume (PVV), emphysema, and traction bronchiectasis...
May 4, 2017: BMC Pulmonary Medicine
https://www.readbyqxmd.com/read/28464661/sound-transmission-loss-characteristics-of-sandwich-panels-with-a-truss-lattice-core
#11
S Ehsan Moosavimehr, A Srikantha Phani
Sandwich panels are extensively used in constructional, naval, and aerospace structures due to the high stiffness and strength-to-weight ratios. In contrast, the sound transmission properties are adversely influenced by the low effective mass. Phase velocity matching of structural waves propagating within the panel and the incident pressure waves from the fluid medium leads to coincidence effects resulting in reduced impedance and high sound transmission. Truss-like lattice cores with porous microarchitecture and reduced inter panel connectivity offer the potential to satisfy the conflicting structural and vibroacoustic response requirements...
April 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28463292/investigation-on-vibration-excitation-of-debonded-sandwich-structures-using-time-average-digital-holography
#12
Binu P Thomas, S Annamala Pillai, C S Narayanamurthy
Sandwich structures, in the modern aerospace industry, are more sought after due to their high strength to stiffness ratio resulting in significant weight gains. Optical techniques like time-average holography and shearography are preferred in industries for inspection of huge sandwich and composite panels because of whole-field (full coverage) inspection in a lesser time leading to large savings in cost. These techniques conventionally use sinusoidal frequency sweep to capture the local resonance of defective regions...
May 1, 2017: Applied Optics
https://www.readbyqxmd.com/read/28462151/honeycomb-liver-abscess
#13
Nobuaki Mori, Koichi Murakami
No abstract text is available yet for this article.
2017: IDCases
https://www.readbyqxmd.com/read/28448414/computed-tomography-features-of-benign-and-malignant-calcified-thyroid-nodules-a-single-center-study
#14
Donghyun Kim, Dong Wook Kim, Young Jin Heo, Jin Wook Baek, Yoo Jin Lee, Young Mi Park, Hye Jin Baek, Soo Jin Jung
OBJECTIVE: No previous studies have investigated thyroid calcification on computed tomography (CT) quantitatively by using Hounsfield unit (HU) values. This study aimed to analyze quantitative HU values of thyroid calcification on preoperative neck CT and to assess the characteristics of benign and malignant calcified thyroid nodules (CTNs). MATERIALS AND METHODS: Two hundred twenty patients who underwent neck CT before thyroid surgery from January 2015 to June 2016 were included...
April 26, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28447322/successful-hepatectomy-for-hepatic-abscess-with-chronic-granulomatous-disease-a-case-report
#15
Ryo Muranushi, Makoto Suzuki, Kenichiro Araki, Norio Kubo, Sayaka Otake, Yutaka Nishida, Takashi Ishige, Hirokazu Arakawa, Hiroyuki Kuwano, Ken Shirabe
BACKGROUND: Chronic granulomatous disease (CGD), a rare inherited disorder, is characterized by impaired ability of phagocytic cells to kill certain bacteria and fungi. Although liver abscess is a common manifestation of CGD, its optimal management in these patients is unknown. Here, we present a case of successful hepatectomy for hepatic abscess in a patient with CGD. CASE PRESENTATION: An adolescent patient with previously diagnosed CGD presented to the pediatrics department of our institution with fever...
December 2017: Surgical Case Reports
https://www.readbyqxmd.com/read/28445071/polymorphic-assembly-from-beveled-gold-triangular-nanoprisms
#16
Juyeong Kim, Xiaohui Song, Fei Ji, Binbin Luo, Nicole F Ice, Qipeng Liu, Qiao Zhang, Qian Chen
The shape anisotropy of nanoparticle building blocks is of critical importance in determining their packing symmetry and assembly directionality. While there has been extensive research on the effect of their overall geometric shapes, the importance of nanometer morphology details is not well-recognized or understood. Here we draw on shape-anisotropic gold triangular nanoprism building blocks synthesized based on a method we recently developed; besides the "large-scale" triangular prism shape (79.8 nm in side length and 22...
May 1, 2017: Nano Letters
https://www.readbyqxmd.com/read/28440615/monolith-supported-amine-functionalized-mg2-dobpdc-adsorbents-for-co2-capture
#17
Lalit A Darunte, Yuri Terada, Christopher R Murdock, Krista S Walton, David S Sholl, Christopher W Jones
The potential of using an amine-functionalized metal organic framework (MOF), mmen-M2(dobpdc) (M = Mg and Mn), supported on a structured monolith contactor for CO2 capture from simulated flue gas is explored. The stability of the unsupported MOF powders under humid conditions is explored using nitrogen physisorption and X-ray diffraction analysis before and after exposure to humidity. Based on its superior stability to humidity, mmen-Mg2(dobpdc) is selected for further growth on a honeycomb cordierite monolith that is wash-coated with α-alumina...
May 9, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28426290/development-of-a-thoracic-personal-sampler-system-for-co-sampling-of-sulfuric-acid-mist-and-sulfur-dioxide-gas
#18
Chih-Hsiang Chien, Alexandros Theodore, Chufan Zhou, Chang-Yu Wu, Yu-Mei Hsu, Brian Birky
A novel personal sampler was designed to measure inorganic acid mists and gases for determining human exposure levels to these acids in workplaces. This sampler consists of (1) a parallel impactor for classifying aerosol by size following the ISO/CEN/ACGIH defined human thoracic fraction, (2) a cellulose filter to collect the residual acid mist but allowing penetration of sulfur dioxide gas, and (3) an accordion-shaped porous membrane denuder (aPMD) for adsorbing the penetrating sulfur dioxide gas. Acid-resistant PTFE was chosen as the housing material to minimize sampling interference...
April 20, 2017: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/28421741/uphill-water-transport-on-a-wettability-patterned-surface-experimental-and-theoretical-results
#19
Yuji Hirai, Hiroyuki Mayama, Yasutaka Matsuo, Masatsugu Shimomura
In nature, there exist many functional water-controlling surfaces, such as the water-repellent surface of lotus leaves, the superhydrophobic water-adhesive surface of rose petals, the water-harvesting surface of a beetle's back, and the water-transporting surface of the legs of Ligia exotica. These natural surfaces suggest that surface chemistry and hierarchical structures are essential for controlling the water behavior. We have reported the preparation of superhydrophobic and antireflection silicon nanospike-array structures using self-organized honeycomb-patterned films as three-dimensional dry-etching masks...
May 1, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28419733/interphotoreceptor-matrix-based-biomaterial-impact-on-human-retinal-progenitor-cell-attachment-and-differentiation
#20
Joydip Kundu, Andrew Michaelson, Petr Baranov, Marco Chiumiento, Tom Nigl, Michael J Young, Rebecca L Carrier
While cell transplantation therapies show great promise as treatments for retinal degeneration, the challenge of low cell survival upon transplantation motivates exploration of materials that may serve as cell delivery vehicles and promote survival and differentiation. In this study, we explored the native matrix that surrounds the outer segments of photoreceptors and promotes their homeostasis, interphotoreceptor matrix (IPM), as a substrate for human retinal progenitor cells (hRPCs). Bovine IPM was characterized to determine its structure and biochemical composition, and processed to develop substrates for cells...
April 18, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
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