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Praveen K Gupta, Ajith A Pillai, Santhosh Satheesh, Raja Selvaraj, Jayaram Balachander
No abstract text is available yet for this article.
September 18, 2017: International Journal of Cardiovascular Imaging
Yunfei Liu, Jun Chen, Shunjing Luo, Cheng Li, Jiangping Ye, Chengmei Liu, Robert G Gilbert
Pregelatinized starch was made from indica rice starch using a so-called "improved extrusion cooking technology" (IECT) under 30%-70% moisture content. IECT-pregelatinized starch (IPS) had higher water solubility and water absorbability compared to native starch at low temperature. For pasting properties, the breakdown and setback viscosities of IPS were significantly (p<0.05) lower than native starch, suggesting improved gel stability and reduced short-term retrogradation. The rice starch granules lost their integrity in IPS, and formed a honeycomb-like structure with increased moisture content in the raw material...
November 1, 2017: Carbohydrate Polymers
Stephen M Winter, Alexander A Tsirlin, Maria Daghofer, Jeroen van den Brink, Yogesh Singh, Philipp Gegenwart, Roser Valenti
The exactly solvable Kitaev model on the honeycomb lattice has recently received enormous attention linked to the hope of achieving novel spin-liquid states with fractionalized Majorana-like excitations. In this review, we analyze the mechanism proposed by G. Jackeli and G. Khaliullin to identify Kitaev materials based on spin-orbital dependent bond interactions and provide a comprehensive overview of its implications in real materials. We set the focus on experimental results and current theoretical understanding of planar honeycomb systems (Na2IrO3, γ-Li2IrO3, and α-RuCl3), three-dimensional Kitaev materials (β- and γ-Li2IrO3), and other potential candidates, completing the review with the list of open questions awaiting new insights...
September 15, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
Gunter Heymann, Elisabeth Selb, Michaela Kogler, Thomas Götsch, Eva-Maria Köck, Simon Penner, Martina Tribus, Oliver Janka
A tellurate compound with Co(II)/Co(III) mixed valence states and lithium ions within orthogonally oriented channels was realized in Li3Co1.06(1)TeO6. The single-crystal structure determination revealed two independent and interpenetrating Li/O and (Co,Te)/O substructures with octahedral oxygen coordination of the metal atoms. In contrast to other mixed oxides, a honeycomb-like ordering of CoO6 and TeO6 octahedra was not observed. Li3Co1.06(1)TeO6 crystallizes orthorhombically with the following unit cell parameters and refinement results: Fddd, a = 588...
September 15, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
Yaqin Wen, Lin Wang, Yue Jin, Jinzhen Zhang, Lei Su, Xiaoling Zhang, Jinhui Zhou, Yi Li
The bacterial and fungal communities of vitex honey were surveyed by sequencing the 16S rRNA gene and the internal transcribed spacer region of ribosomal DNA. Vitex honey samples were analyzed at different stage of ripening; the vitex flower was also analyzed, and the effect of the chemical composition in the experimental setup was assessed. The results confirmed the presence of dominant Bacillus spp. as the dominant bacterial in honey, and yeast related genera was the main fungal in the honey, respectively...
2017: Frontiers in Microbiology
Yimeng Feng, Guojing Wang, Jiecui Liao, Wei Li, Chienhua Chen, Mingyang Li, Zhengcao Li
A new structure of honeycomb-like ZnO mesoporous nanowall arrays (MNWAs) with highly efficient photocatalytic activity was designed and successfully synthesized on Al foil by hydrothermal method. The nanowalls of ZnO-MNWAs have mesopores, which possess a large surface area. The visible light absorption of ZnO-MNWAs was efficiently stronger than ZnO nanowire, resulting in that the photocatalytic activity of ZnO-MNWAs, whose bandgap energy was 3.12 eV, was 5.97 times than that of ZnO nanowires in the degradation of methyl orange...
September 14, 2017: Scientific Reports
Tyler Reyno, P Ross Underhill, Thomas W Krause, Catharine Marsden, Diane Wowk
Surface damage on honeycomb aircraft panels is often measured manually, and is therefore subject to variation based on inspection personnel. Eddy current testing (ECT) is sensitive to variations in probe-to-specimen spacing, or lift-off, and is thus promising for high-resolution profiling of surface damage on aluminum panels. Lower frequency testing also allows inspection through the face sheet, an advantage over optical 3D scanning methods. This paper presents results from the ECT inspection of surface damage on an approximately flat aluminum honeycomb aircraft panel, and compares the measurements to those taken using optical 3D scanning technology...
September 14, 2017: Sensors
M Eldafrawy, M G Ebroin, P A Gailly, J-F Nguyen, M J Sadoun, A K Mainjot
The objective of this study was to evaluate the interfacial fracture toughness (IFT) of composite cement with dispersed filler (DF) versus polymer-infiltrated ceramic network (PICN) computer-aided design and computer-aided manufacturing (CAD-CAM) composite blocks after 2 different surface pretreatments using the notchless triangular prism (NTP) test. Two DFs (Cerasmart [CRT] and Lava Ultimate [LVA]), 2 PICNs (Enamic [ENA] and experimental PICN [EXP]), and e.max CAD lithium disilicate glass-ceramic (EMX, control) prism samples were bonded to their counterparts with Variolink Esthetic DC composite cement after either hydrofluoric acid etching (HF) or gritblasting (GR)...
September 1, 2017: Journal of Dental Research
Nhi N Bui, Maria Ledina, Theodore J Reber, Jin Jung, John L Stickney
Germanene is a 2D material whose structure and properties are of great interest for integration with Si technology. Preparation of germanene experimentally remains a challenge because, unlike graphene, bulk germanene does not exist. Thus, germanene cannot be directly exfoliated and is mostly grown in ultrahigh vacuum. The present report uses electrodeposition in an aqueous HGeO3(-) solution at pH 9. Germanene deposition has been limited to 2-3 monolayers, thus greatly restricting many applicable characterization methods...
September 14, 2017: ACS Nano
Yaowen Liu, Guisen Xu, Jiaojun Wei, Qiang Wu, Xiaohong Li
Challenges remain in engineering cardiac tissues with functional and morphological properties similar to those of native myocardium. In the current study, micropatterned fibrous mats are obtained by deposition of electrospun fibers on lithographic collectors to reproduce the anisotropic structure of myocardium, and carbon nanotubes are included in fibers to provide conductivities at the same level of cardiac muscles. The patterned mats are assembled layer-by-layer into patterned scaffolds for coculture of primary cardiomyocytes (CMs) with cardiac fibroblasts (CFs) and endothelial cells (ECs)...
December 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
Chaochao Yang, Rui Xue, Qingsong Zhang, Shulin Yang, Pengfei Liu, Li Chen, Ke Wang, Xiaoyong Zhang, Yen Wei
High antibacterial and skin-like hydrogels have always been the perfect wound dressing for human to protect wound from infection. Here, based on silk sericin, we design a series of nanoclay lithium magnesium silicate hydrate (LMSH) cross-linked semi-IPN sericin/poly(NIPAm/LMSH) (HSP) nanocomposite hydrogels and demonstrate advantages in serving as antibacterial wound dressing in comparison with gauze. Firstly, the effect of mass ratios of sericin/(sericin+NIPAm) upon pore structure, feasibility of mechanics and gas permeability of HSP nanocomposite hydrogels were evaluated...
December 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
Regis Stephan, Mickael Derivaz, Marie-Christine Hanf, Didier Dentel, Natalia Massara, Ahmed Mehdaoui, Philippe Sonnet, Carmelo Pirri
A new germanene crystallographic structure is investigated by scanning tunnelling microscopy and density functional theory calculations. We found that germanene can crystallize in two stable but different structures when grown on Al(111) at the same temperature. These structures are evidenced in scanning tunnelling images by a honeycomb contrast and by a hexagonal contrast. These contrasts are relevant of a Ge network with one (hexagonal) or two (honeycomb) Ge atoms per unit cell shifted upward with respect to the other Ge atoms...
September 12, 2017: Journal of Physical Chemistry Letters
Masae Takahashi
Silicene is the silicon equivalent of graphene, which is composed of a honeycomb carbon structure with one atom thickness and has attractive characteristics of a perfect two-dimensional π-conjugated sheet. However, unlike flat and highly stable graphene, silicene is relatively sticky and thus unstable due to its puckered or crinkled structure. Flatness is important for stability, and to obtain perfect π-conjugation, electron-donating atoms and molecules should not interact with the π electrons. The structural differences between silicene and graphene result from the differences in their building blocks, flat benzene and chair-form hexasilabenzene...
September 7, 2017: Scientific Reports
Chad A Galloway, Sonal Dalvi, Sandy S C Hung, Leslie A MacDonald, Lisa R Latchney, Raymond C B Wong, Robyn H Guymer, David A Mackey, David S Williams, Mina M Chung, David M Gamm, Alice Pébay, Alex W Hewitt, Ruchira Singh
Age-related macular degeneration (AMD) and related macular dystrophies (MDs) are a major cause of vision loss. However, the mechanisms underlying their progression remain ill-defined. This is partly due to the lack of disease models recapitulating the human pathology. Furthermore, in vivo studies have yielded limited understanding of the role of specific cell types in the eye vs. systemic influences (e.g., serum) on the disease pathology. Here, we use human induced pluripotent stem cell-retinal pigment epithelium (hiPSC-RPE) derived from patients with three dominant MDs, Sorsby's fundus dystrophy (SFD), Doyne honeycomb retinal dystrophy/malattia Leventinese (DHRD), and autosomal dominant radial drusen (ADRD), and demonstrate that dysfunction of RPE cells alone is sufficient for the initiation of sub-RPE lipoproteinaceous deposit (drusen) formation and extracellular matrix (ECM) alteration in these diseases...
September 6, 2017: Proceedings of the National Academy of Sciences of the United States of America
Xu-Dong Wang, Yang Cao, Yuan Teng, Hong-Yan Chen, Yang-Fan Xu, Dai-Bin Kuang
Transition metal phosphides have regarded as robust, inexpensive electrocatalysts for both the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) recently. Thus far, tremendous scientific efforts have been applied to improve the catalytic activity of catalyst, whereas the scale-up fabrication of morphology-controlled catalysts while maintaining their desired performance remains a great challenge. Herein, we present a facile and scalable approach to fabricate the macroporous Ni2P/nickel foam (mp-Ni2P/Ni foam) electrode...
September 6, 2017: ACS Applied Materials & Interfaces
Zhiyong Guo, Dillip K Panda, Monica A Gordillo, Amina Khatun, Hui Wu, Wei Zhou, Sourav Saha
A new honeycomb-shaped electroactive metal-organic framework (MOF) has been constructed from an electron deficient naphthalenediimide (NDI) ligand equipped with two terminal salicylic acid groups. π-Intercalation of electron-rich planar tetrathiafulvalene (TTF) guests between the NDI ligands stacked along the walls lowers the electronic band gap of the material by ca. 1 eV. An improved electron delocalization through the guest-mediated π-donor/acceptor stacks is attributed to the diminished band gap of the doped material, which forecasts an improved electrical conductivity...
September 15, 2017: ACS Applied Materials & Interfaces
Eizaburo Ohno, Yoshiki Hirooka, Hiroki Kawashima, Takuya Ishikawa, Akira Kanamori, Hideki Ishikawa, Yoji Sasaki, Koji Nonogaki, Kazuo Hara, Senju Hashimoto, Hiroshi Matsubara, Takanori Hirai, Hajime Sumi, Hiroyuki Sugimoto, Hidemi Goto
BACKGROUD AND AIM: To elucidate the natural history of pancreatic cystic lesions (PCLs), including branch-duct intraductal papillary mucinous neoplasm (BD-IPMN), via mid-term follow-up analysis of a multicenter prospective observational study (NSPINAL study). METHODS: From July 2011 to October 2016, 881 patients with PCLs were enrolled in NSPINAL study, and 664 patients with >12 months of follow-up were analysed. Every patient was asymptomatic, and endoscopic ultrasound (EUS) was performed at the initial diagnosis to exclude high-risk individuals...
September 5, 2017: Journal of Gastroenterology and Hepatology
Andrew Wildes, Virginie Simonet, E Ressouche, Rafik Ballou, Garry J McIntyre
The magnetic properties and magnetic structure are presented for CoPS<sub>3</sub>, a quasi-two-dimensional antiferromagnet on a honeycomb lattice with a Néel temperature of T<sub>N</sub> ∽ 120 K. The compound is shown to have XY-like anisotropy in its susceptibility, and the anisotropy is analysed to extract crystal field parameters. For temperatures between 2 K and 300 K, no phase transitions were observed in the field-dependent magnetization up to 10 Tesla. Single-crystal neutron diffraction shows that the magnetic propagation vector is <b>k</b> = [010] with the moments mostly along the <b>a</b> axis and with a small component along the <b>c</b> axis, which largely verifies the previously-published magnetic structure for this compound...
September 5, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
Weiwei Tie, Surjya Sarathi Bhattacharyya, Yuanhao Gao, Zhi Zheng, Eun Jeong Shin, Tae Hyung Kim, MinSu Kim, Joong Hee Lee, Seung Hee Lee
Electric field-induced reorientation of suspended graphitic (GP) flakes and its relaxation back to the original state in a nematic liquid crystal (NLC) host are of interest not only in academia, but also in industrial applications, such as polarizer-free and optical film-free displays, and electro-optic light modulators. As the phenomenon has been demonstrated by thorough observation, the detailed study of the physical properties of the host NLC (the magnitude of dielectric anisotropy, elastic constants, and rotational viscosity), the size of the GP flakes, and cell thickness, are urgently required to be explored and investigated...
September 1, 2017: Nanomaterials
Yanan Zhang, Wei Liu, Bin Quan, Guangbin Ji, Jianna Ma, Daoran Li, Wei Meng
Design of dielectric/magnetic heterostructure and multiple interfaces is a challenge for the microwave absorption. Thus, in this study, a novel C/Fe3C nanocomposites have been fabricated by annealing the precursors obtained by the facile chemical blowing of polyvinyl pyrrolidone (PVP) and Fe(NO3)3·9H2O. By changing the content of Fe(NO3)3·9H2O, the honeycomb-like structure with scads of pores and electromagnetic parameters could be successfully tailored. When the addition of Fe(NO3)3·9H2O is ranging from 1 to 2g, honeycomb-structured nanocomposites possess high performance microwave absorption when mixed with 90wt% paraffin...
August 23, 2017: Journal of Colloid and Interface Science
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