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https://www.readbyqxmd.com/read/28449298/all-silicon-switchable-magnetoelectric-effect-via-interlayer-exchange-coupling
#1
Hang Liu, Jia Tao Sun, Huixia Fu, Peijie Sun, Yuanping Feng, Sheng Meng
The magnetoelectric (ME) effect originating from the effective coupling between electric field and magnetism is an exciting frontier in nanoscale science such as magnetic tunneling junction (MTJ), ferroelectric/piezoelectric heterojunctions etc. The realization of switchable ME effect under external electric field in d^0 semiconducting materials of single composition is needed especially for all-silicon spintronics applications because of its natural compatibility with current industry. We employ the density functional theory (DFT) to reveal that the pristine Si(111)-√3×√3R30º (Si√3 hereafter) reconstructed surfaces of thin films with thickness smaller than eleven bilayers support sizeable linear ME effect with switchable direction of magnetic moment under external electric field...
April 27, 2017: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
https://www.readbyqxmd.com/read/28448911/adsorption-of-polar-organic-molecules-on-sediments-case-study-on-callovian-oxfordian-claystone
#2
S Rasamimanana, G Lefèvre, R V H Dagnelie
The release and transport of anthropogenic organic matter through the geosphere is often an environmental criterion of safety. Sedimentary rocks are widely studied in this context as geological barriers for waste management. It is the case of Callovian-Oxfordian claystone (COx), for which several studies report adsorption of anthropogenic organic molecules. In this study, we evaluated and reviewed adsorption data of polar organic molecules on COx claystone. Experiments were performed on raw claystone, decarbonated and clay fractions...
April 21, 2017: Chemosphere
https://www.readbyqxmd.com/read/28448831/computer-simulations-analysis-for-determining-the-polarity-of-charge-generated-by-high-energy-electron-irradiation-of-a-thin-film
#3
Marek Malac, Simon Hettler, Misa Hayashida, Masahiro Kawasaki, Yuji Konyuba, Yoshi Okura, Hirofumi Iijima, Isamu Ishikawa, Marco Beleggia
Detailed simulations are necessary to correctly interpret the charge polarity of electron beam irradiated thin film patch. Relying on systematic simulations we provide guidelines and movies to interpret experimentally the polarity of the charged area, to be understood as the sign of the electrostatic potential developed under the beam with reference to a ground electrode. We discuss the two methods most frequently used to assess charge polarity: Fresnel imaging of the irradiated area and Thon rings analysis...
April 3, 2017: Micron: the International Research and Review Journal for Microscopy
https://www.readbyqxmd.com/read/28448743/circular-rnas-with-hammerhead-ribozymes-encoded-in-eukaryotic-genomes-the-enemy-at-home
#4
Marcos de la Peña, Amelia Cervera
A new family of non-autonomous retrotransposons with self-cleaving hammerhead ribozymes, the so called retrozymes, has recently been found encoded in a number of plant genomes. These retroelements can be actively transcribed, and their RNAs accumulate in the cells as abundant non-coding circular RNAs (circRNAs) of small size (600-1000 nt). Related circRNAs with self-cleaving ribozymes had already been described in plants, and belong to a group of infectious RNA agents with an uncertain origin: the viroids and viroid-like satellites of plant RNA viruses...
April 27, 2017: RNA Biology
https://www.readbyqxmd.com/read/28448610/characterization-and-expression-analysis-of-galnts-in-developing-strongylocentrotus-purpuratus-embryos
#5
Amber L Famiglietti, Zheng Wei, Thomas M Beres, Adina L Milac, Duy T Tran, Divya Patel, Robert C Angerer, Lynne M Angerer, Lawrence A Tabak
Mucin-type O-glycosylation is a ubiquitous posttranslational modification in which N-Acetylgalactosamine (GalNAc) is added to the hydroxyl group of select serine or threonine residues of a protein by the family of UDP-GalNAc:Polypeptide N-Acetylgalactosaminyltransferases (GalNAc-Ts; EC 2.4.1.41). Previous studies demonstrate that O-glycosylation plays essential roles in protein function, cell-cell interactions, cell polarity and differentiation in developing mouse and Drosophila embryos. Although this type of protein modification is highly conserved among higher eukaryotes, little is known about this family of enzymes in echinoderms, basal deuterostome relatives of the chordates...
2017: PloS One
https://www.readbyqxmd.com/read/28448431/a-type-2-block-component-decomposition-based-2d-aoa-estimation-algorithm-for-an-electromagnetic-vector-sensor-array
#6
Yu-Fei Gao, Guan Gui, Wei Xie, Yan-Bin Zou, Yue Yang, Qun Wan
This paper investigates a two-dimensional angle of arrival (2D AOA) estimation algorithm for the electromagnetic vector sensor (EMVS) array based on Type-2 block component decomposition (BCD) tensor modeling. Such a tensor decomposition method can take full advantage of the multidimensional structural information of electromagnetic signals to accomplish blind estimation for array parameters with higher resolution. However, existing tensor decomposition methods encounter many restrictions in applications of the EMVS array, such as the strict requirement for uniqueness conditions of decomposition, the inability to handle partially-polarized signals, etc...
April 27, 2017: Sensors
https://www.readbyqxmd.com/read/28448276/white-light-emission-of-monolithic-ingan-gan-grown-on-morphology-controlled-nanostructured-gan-templates
#7
Keun Man Song, Do Hyun Kim, Jong Min Kim, Chu-Young Cho, Jehyuk Choi, Ka Hee Kim, Jinsub Park, Hogyoung Kim
We demonstrated an InGaN/GaN-based, monolithic, white light-emitting diode (LED) without phosphors by using morphology-controlled active layers formed on multi-facet GaN templates containing polar and semipolar surfaces. The nanostructured surface morphology was controlled by changing the growth time, and distinct multiple photoluminescence peaks were observed at 360, 460, and 560 nm; these features were caused by InGaN/GaN-based multiple quantum wells (MQWs) on the nanostructured facets. The origin of each multi-peak was related to the different indium (In) compositions in the different planes of the quantum wells grown on the nanostructured GaN...
April 27, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28448132/eu-iii-chiral-coordination-polymer-with-a-structural-transformation-system
#8
Naoyuki Koiso, Yuichi Kitagawa, Takayuki Nakanishi, Koji Fushimi, Yasuchika Hasegawa
A luminescent Eu(III) chiral coordination polymer with a structural transformation system, [Eu(hfa)3((R)-bidp)]n (hfa: haxafluoroacetylacetonato, (R)-bidp: (R)-1,1'-binaphthyl-2,2'-bis(diphenylphosphinate), is reported. Single-crystal X-ray analysis revealed a characteristic helical polymer structure of [Eu(hfa)3((R)-bidp)]n with hydrogen-fluorine/π interactions. [Eu(hfa)3((R)-bidp)]n shows high thermostability (decomposition temperature = 320 °C) and strong luminescence properties (the 4f-4f emission quantum yield = 76%) in the solid state due to its tight packing and asymmetric structure...
April 27, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28448060/small-rna-transfection-in-primary-human-th17-cells-by-next-generation-electroporation
#9
Misty M Montoya, K Mark Ansel
CD4(+) T cells can differentiate into several subsets of effector T helper cells depending on the surrounding cytokine milieu. Th17 cells can be generated from naïve CD4(+) T cells in vitro by activating them in the presence of the polarizing cytokines IL-1β, IL-6, IL-23, and TGFβ. Th17 cells orchestrate immunity against extracellular bacteria and fungi, but their aberrant activity has also been associated with several autoimmune and inflammatory diseases. Th17 cells are identified by the chemokine receptor CCR6 and defined by their master transcription factor, RORγt, and characteristic effector cytokine, IL-17A...
April 13, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28448046/a-novel-technique-for-raman-analysis-of-highly-radioactive-samples-using-any-standard-micro-raman-spectrometer
#10
Jean-Yves Colle, Mohamed Naji, Mark Sierig, Dario Manara
A novel approach for the Raman measurement of nuclear materials is reported in this paper. It consists of the enclosure of the radioactive sample in a tight capsule that isolates the material from the atmosphere. The capsule can optionally be filled with a chosen gas pressurized up to 20 bars. The micro-Raman measurement is performed through an optical-grade quartz window. This technique permits accurate Raman measurements with no need for the spectrometer to be enclosed in an alpha-tight containment. It therefore allows the use of all options of the Raman spectrometer, like multi-wavelength laser excitation, different polarizations, and single or triple spectrometer modes...
April 12, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28447985/methods-for-the-self-integration-of-megamolecular-biopolymers-on-the-drying-air-lc-interface
#11
Kosuke Okeyoshi, Kensuke Osada, Maiko K Okajima, Tatsuo Kaneko
Living organisms that use water are always prone to drying in the environment. Their activities are driven by biopolymer-based micro- and macro-structures, as seen in the cases of moving water in vascular bundles and moisturizing water in skin layers. In this study, we developed a method for assessing the effect of aqueous liquid crystalline (LC) solutions composed of biopolymers on drying. As LC biopolymers have megamolecular weight, we chose to study polysaccharides, cytoskeletal proteins, and DNA. The observation of biopolymer solutions during drying under polarized light reveals milliscale self-integration starting from the unstable air-LC interface...
April 7, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28447893/ultra-small-solid-archaeolipid-nanoparticles-for-active-targeting-to-macrophages-of-the-inflamed-mucosa
#12
Leticia Herminia Higa, Horacio Emanuel Jerez, Marcelo Alexandre de Farias, Rodrigo Villares Portugal, Eder Lilia Romero, Maria Jose Morilla
AIM: Develop nanoparticulate agents for oral targeted delivery of dexamethasone (Dex) to macrophages of inflamed mucosa. MATERIALS & METHODS: Solid archaeolipid nanoparticles (SAN-Dex) (compritol/Halorubrum tebenquichense polar archaeolipids/soybean phosphatidylcholine/Tween-80 4; 0.9; 0.3; 3% w/w) loaded with Dex were prepared. Their mucopenetration, stability under digestion and in vitro anti-inflammatory activity, were determined. RESULTS: Ultra-small SAN-Dex strongly reduced the levels of TNF-α, IL-6 and IL-12 on J774A1 cells stimulated with lipopolysaccharides as compared with free Dex or loaded in ordinary solid lipid nanoparticles-Dex...
April 27, 2017: Nanomedicine
https://www.readbyqxmd.com/read/28447744/cyclic-compression-stimulates-osteoblast-differentiation-via-activation-of-the-wnt-%C3%AE-catenin-signaling-pathway
#13
Xi Chen, Jianmin Guo, Yu Yuan, Zhongguang Sun, Binglin Chen, Xiaoyang Tong, Lingli Zhang, Chao Shen, Jun Zou
It is widely accepted that mechanical stress is an important factor in bone associated cell differentiation, including that of mesenchymal stem cells, osteoblasts and osteocytes. The present study aimed to determine the effect of mechanical cyclic compressive load on osteoblast differentiation, and whether this was associated with activation of the wingless‑type (Wnt)/β-catenin signaling pathway. Using a 3D scaffold model, MC3T3‑E1 cells were exposed to cyclic compressive loading via the Flexcell‑5000C™ Compression system...
March 15, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28447702/structures-in-the-meniscus-of-smectic-membranes-the-role-of-dislocations
#14
M Selmi, J-C Loudet, P V Dolganov, T Othman, P Cluzeau
We report an experimental investigation of the structure of periodic patterns observed in the meniscus of free-standing smectic films. Combination of polarizing optical microscopy and phase shifting interferometry enabled us to obtain new information on the structure of the meniscus, and in particular, on the topography of the smectic-air interface. We investigate the profile of the undulations in the striped structure in the thin part of the meniscus, change of the stripe period with the meniscus thickness and subsequent transition into a two-dimensional structure...
April 27, 2017: Soft Matter
https://www.readbyqxmd.com/read/28447612/distinct-molecular-cues-ensure-a-robust-microtubule-dependent-nuclear-positioning-in-the-drosophila-oocyte
#15
Nicolas Tissot, Jean-Antoine Lepesant, Fred Bernard, Kevin Legent, Floris Bosveld, Charlotte Martin, Orestis Faklaris, Yohanns Bellaïche, Maïté Coppey, Antoine Guichet
Controlling nucleus localization is crucial for a variety of cellular functions. In the Drosophila oocyte, nuclear asymmetric positioning is essential for the reorganization of the microtubule (MT) network that controls the polarized transport of axis determinants. A combination of quantitative three-dimensional live imaging and laser ablation-mediated force analysis reveal that nuclear positioning is ensured with an unexpected level of robustness. We show that the nucleus is pushed to the oocyte antero-dorsal cortex by MTs and that its migration can proceed through distinct tracks...
April 27, 2017: Nature Communications
https://www.readbyqxmd.com/read/28447602/spatial-computation-of-intratumoral-t-cells-correlates-with-survival-of-patients-with-pancreatic-cancer
#16
Julienne L Carstens, Pedro Correa de Sampaio, Dalu Yang, Souptik Barua, Huamin Wang, Arvind Rao, James P Allison, Valerie S LeBleu, Raghu Kalluri
The exact nature and dynamics of pancreatic ductal adenocarcinoma (PDAC) immune composition remains largely unknown. Desmoplasia is suggested to polarize PDAC immunity. Therefore, a comprehensive evaluation of the composition and distribution of desmoplastic elements and T-cell infiltration is necessary to delineate their roles. Here we develop a novel computational imaging technology for the simultaneous evaluation of eight distinct markers, allowing for spatial analysis of distinct populations within the same section...
April 27, 2017: Nature Communications
https://www.readbyqxmd.com/read/28447597/resonant-and-non-resonant-magnetic-scatterings-with-circularly-polarized-x-rays-magnetic-scattering-factor-and-electron-density-of-gadolinium-iron-garnet
#17
Yo Sasaki, Maki Okube, Satoshi Sasaki
Theoretical and experimental studies on resonant magnetic scattering have been carried out using circularly polarized X-rays. Polarization dependence of the asymmetric ratio between right- and left-handed polarized scattering amplitudes has revealed that resonant and non-resonant magnetic scatterings can be observed simultaneously. In this study, synchrotron X-ray intensity experiments were conducted on Gd iron garnet (GdIG) at the pre-edge of the Fe K absorption edge. The asymmetric ratio between circular polarizations exhibited three peaks due to the resonant magnetic responses of Fe(3+) in the Fe2 (24d) site...
May 1, 2017: Acta Crystallographica. Section A, Foundations and Advances
https://www.readbyqxmd.com/read/28447450/band-bending-of-ga-polar-gan-interfaced-with-al2o3-through-ultraviolet-ozone-treatment
#18
Kwangeun Kim, Jae Ha Ryu, Jisoo Kim, Sang June Cho, Dong Liu, Jeongpil Park, In-Kyu Lee, Baxter Moody, Weidong Zhou, John Albrecht, Zhenqiang Ma
Understanding the band bending at the interface of GaN/dielectric under different surface treatment conditions is critically important for device design, device performance, and device reliability. The effects of ultraviolet/ozone (UV/O3) treatment of the GaN surface on the energy band bending of atomic-layer-deposition (ALD) Al2O3 coated Ga-polar GaN were studied. The UV/O3 treatment and post-ALD anneal can be used to effectively vary the band bending, valence band offset, conduction band offset, and interface dipole at the Al2O3/GaN interfaces...
April 27, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28447346/a-charge-equilibration-formalism-for-treating-charge-transfer-effects-in-md-simulations-application-to-water-clusters
#19
Sudipta Kumar Sinha, Mohit Mehta, Sandeep Patel
Conventional classical force fields by construction do not explicitly partition intermolecular interactions to include polarization and charge transfer effects, whereas fully quantum mechanical treatments allow a means to effect this dissection (although not uniquely due to the lack of a charge transfer operator). Considering the importance of polarization in a variety of systems, a particular class of classical models, charge equilibration models, have been extensively developed to study those systems; since these types of interaction models are inherently based on movement of charge throughout a system, they are natural platform for including polarization and charge transfer effects within the context of molecular simulations...
June 15, 2017: Journal of Computational Chemistry
https://www.readbyqxmd.com/read/28447183/optical-and-photophysical-investigation-of-2e-1-2-5-dimethylfuran-3-yl-3-9-ethyl-9h-carbazol-3-yl-prop-2-en-1-one-depo-by-spectrofluorometer-in-organized-medium
#20
Abdullah M Asiri, Al-Anood M Al-Dies, Salman A Khan
(2E)-1-(2,5-dimethylfuran-3-yl)-3-(9-ethyl-9H-carbazol-3-yl)prop-2-en-1-one (DEPO) was prepared by the reaction of 9-ethyl-9H-carbazole-3-carbaldehyde with 1-(2,5-dimethylfuran-3-yl)ethanone under microwave irradiation. The structure of DEPO was established experimentally by EI-MS, FT-IR, (1)H and (13)C NMR spectral studies. Electronic absorption and emission spectra of DEPO were studied in different solvents on the basis of polarities, and the obtain data were used to determine the solvatochromic properties such as extinction coefficient, oscillator strength, transition dipole moment, stokes shift, fluorescence quantum yield and photochemical quantum yield...
April 26, 2017: Journal of Fluorescence
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