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Emergency planing

Lessly P Sepulveda-Rincon, Delphine Dube, Pierre Adenot, Ludivine Laffont, Sylvie Ruffini, Laurence Gall, Bruce K Campbell, Veronique Duranthon, Nathalie Beaujean, Walid E Maalouf
The first lineage specification during mammalian embryo development can be visually distinguished at blastocyst stage. Two cell lineages are observed on the embryonic/abembryonic axis of the blastocyst: the inner cell mass and the trophectoderm. The timing and mechanisms driving this process are still not fully understood. In mouse embryos, cells seem pre-patterned to become certain cell lineage; as the first cleavage plane has been related with further embryonic-abembryonic axis at blastocyst stage. Nevertheless, this possibility has been very debatable...
October 19, 2016: Biology of Reproduction
Suman Chowdhury, Debnarayan Jana
Inspired by the success of graphene, various two dimensional (2D) structures in free standing (FS) (hypothetical) form and on different substrates have been proposed recently. Silicene, a silicon counterpart of graphene, is predicted to possess massless Dirac fermions and to exhibit an experimentally accessible quantum spin Hall effect. Since the effective spin-orbit interaction is quite significant compared to graphene, buckling in silicene opens a gap of 1.55 meV at the Dirac point. This band gap can be further tailored by applying in plane stress, an external electric field, chemical functionalization and defects...
October 18, 2016: Reports on Progress in Physics
Shruti Jain, Nazia Nazir, Rashid M Khan, Syed M Ahmed
INTRODUCTION: Extubation in deep plane of anesthesia followed by Guedel's oropharyngeal airway (OPA™) insertion is a routine method to avoid hemodynamic changes associated with tracheal extubation. Exchange of endotracheal tube (ETT) with Classic laryngeal mask airway (LMA™) prior to emergence from anesthesia also serves similar purpose. We had compared the hemodynamic changes involved during this ETT/LMA™ and ETT/OPA™ exchange technique. MATERIAL AND METHODS: This was a randomized prospective study on ASA I and 2 patients undergoing elective surgery under general anesthesia...
September 2016: Anesthesia, Essays and Researches
Kousaku Saotome, Akira Matsushita, Koji Matsumoto, Yoshiaki Kato, Kei Nakai, Koichi Murata, Tetsuya Yamamoto, Yoshiyuki Sankai, Akira Matsumura
PURPOSE: A fast spin-echo sequence based on the Periodically Rotated Overlapping Parallel Lines with Enhanced Reconstruction (PROPELLER) technique is a magnetic resonance (MR) imaging data acquisition and reconstruction method for correcting motion during scans. Previous studies attempted to verify the in vivo capabilities of motion-corrected PROPELLER in real clinical situations. However, such experiments are limited by repeated, stray head motion by research participants during the prescribed and precise head motion protocol of a PROPELLER acquisition...
October 11, 2016: Magnetic Resonance Imaging
F G Mitri
The analysis using the partial-wave series expansion (PWSE) method in spherical coordinates is extended to evaluate the acoustic radiation force experienced by rigid oblate and prolate spheroids centered on the axis of wave propagation of high-order Bessel vortex beams composed of progressive, standing and quasi-standing waves, respectively. A coupled system of linear equations is derived after applying the Neumann boundary condition for an immovable surface in a non-viscous fluid, and solved numerically by matrix inversion after performing a single numerical integration procedure...
September 30, 2016: Ultrasonics
Feng Qin, Ximin Cui, Qifeng Ruan, Yunhe Lai, Jianfang Wang, Hongge Ma, Hai-Qing Lin
A number of plasmonic devices and applications, such as chemical and biological sensors, plasmon-enhanced solar cells, optical nanoantennas, metamaterials and metasurfaces, require the deposition of plasmonic metal nanocrystals on various substrates. Because the localized plasmon resonance modes, energies and strengths are strongly dependent on the dielectric function of the surrounding environment, the substrate is expected to largely affect the plasmonic properties of supported metal nanocrystals. Therefore, understanding the effects of the substrate on the plasmonic properties of metal nanocrystals and the roles of the involved factors will be crucial for designing various plasmonic devices that are made of metal nanocrystals deposited on different substrates...
October 14, 2016: Nanoscale
Roozbeh Abedini-Nassab, Daniel Y Joh, Faris Albarghouthi, Ashutosh Chilkoti, David M Murdoch, Benjamin B Yellen
The ability to direct and sort individual biological and non-biological particles into spatially addressable locations is fundamentally important to the emerging field of single cell biology. Towards this goal, we demonstrate a new class of magnetophoretic transistors, which can switch single magnetically labeled cells and magnetic beads between different paths in a microfluidic chamber. Compared with prior work on magnetophoretic transistors driven by a two-dimensional in-plane rotating field, the addition of a vertical magnetic field bias provides significant advantages in preventing the formation of particle clumps and in better replicating the operating principles of circuits in general...
October 18, 2016: Lab on a Chip
Pin Chia Hsu, Damien Jefferies, Syma Khalid
Carbon fullerenes are emerging as promising components of devices for various biomedical applications, from the transportation of nanosized drugs, to the extraction of harmful oxidants and radicals. It has been proposed that fullerenes could also be used as antibacterial agents, given the realization that they can be used to kill pathogenic Gram-negative bacteria. To explore this at the molecular level, we have performed a series of coarse-grained (CG) molecular dynamics (MD) simulations with the Martini force field, to study how pristine C60 fullerenes interact with bacterial membranes...
October 7, 2016: Journal of Physical Chemistry. B
Jeffrey S Cannon, Larry E Overman
Allylic amides, amines, and esters are key synthetic building blocks. Their enantioselective syntheses under mild conditions is a continuing pursuit of organic synthesis methods development. One opportunity for the synthesis of these building blocks is by functionalization of prochiral double bonds using palladium(II) catalysis. In these reactions, nucleopalladation mediated by a chiral palladium(II) catalyst generates a new heteroatom-substituted chiral center. However, reactions where nucleopalladation occurs with antarafacial stereoselectivity are difficult to render enantioselective because of the challenge of transferring chiral ligand information across the square-planar palladium complex to the incoming nucleophile...
October 18, 2016: Accounts of Chemical Research
Giovanni I Martone, Francesco V Pepe, Paolo Facchi, Saverio Pascazio, Sandro Stringari
We study the zero-temperature phase diagram of a spin-orbit-coupled Bose-Einstein condensate of spin 1, with equally weighted Rashba and Dresselhaus couplings. Depending on the antiferromagnetic or ferromagnetic nature of the interactions, we find three kinds of striped phases with qualitatively different behaviors in the modulations of the density profiles. Phase transitions to the zero-momentum and the plane-wave phases can be induced in experiments by independently varying the Raman coupling strength and the quadratic Zeeman field...
September 16, 2016: Physical Review Letters
Young-Hoon Kim, Himchan Cho, Tae-Woo Lee
Twenty years after layer-type metal halide perovskites were successfully developed, 3D metal halide perovskites (shortly, perovskites) were recently rediscovered and are attracting multidisciplinary interest from physicists, chemists, and material engineers. Perovskites have a crystal structure composed of five atoms per unit cell (ABX3) with cation A positioned at a corner, metal cation B at the center, and halide anion X at the center of six planes and unique optoelectronic properties determined by the crystal structure...
September 27, 2016: Proceedings of the National Academy of Sciences of the United States of America
Catherine Chin, Adrian Bradu, Rongxuan Lim, Mona Khandwala, John Schofield, Lasse Leick, Adrian Podoleanu
Optical coherence tomography (OCT) is fast emerging as an additional non-interventional modality for skin tumor detection and diagnosis. A master/slave flying spot OCT configuration was assembled to detect periocular basal cell carcinomas (BCC). A swept source at 1300 nm and sweeping speed of 50 kHz were used. A three-step process was involved. First, 384 channeled spectra using a mirror were stored for 384 optical path differences at the master stage. Then, the stored channeled spectra (masks) were correlated with the channeled spectrum from the BCC tissue to produce 384 en face OCT images (200×200 pixels) for the optical path difference values used to acquire the masks...
September 10, 2016: Applied Optics
Vasiliki Tsaparli, Stavroula Kontoe, David M G Taborda, David M Potts
Soil liquefaction has been extensively investigated over the years with the aim to understand its fundamental mechanism and successfully remediate it. Despite the multi-directional nature of earthquakes, the vertical seismic component is largely neglected, as it is traditionally considered to be of much lower amplitude than the components in the horizontal plane. The 2010-2011 Canterbury earthquake sequence in New Zealand is a prime example that vertical accelerations can be of significant magnitude, with peak amplitudes well exceeding their horizontal counterparts...
August 2016: Proceedings. Mathematical, Physical, and Engineering Sciences
Ali Modabber, Florian Peters, Kristian Kniha, Evgeny Goloborodko, Alireza Ghassemi, Bernd Lethaus, Frank Hölzle, Stephan Christian Möhlhenrich
PURPOSE: Numerous three-dimensional (3D) facial scanners have emerged on the market; however, publications evaluating their accuracies are sparse. In this study, the accuracy of two 3D scanners used in facial scanning was evaluated. MATERIALS AND METHODS: A test specimen was attached at the right cheek and the forehead of 41 volunteers. These volunteers were scanned with Artec EVA(®) and FaceScan3D(®). The acquired data were aligned to a 3D model of the test specimen for comparing the mean error, original length and width and angles to the measured values...
August 18, 2016: Journal of Cranio-maxillo-facial Surgery
Chuan Qian, Jia Sun, Ling-An Kong, Guangyang Gou, Junliang Yang, Jun He, Yongli Gao, Qing Wan
Realization of biological synapses using electronic devices is regarded as the basic building blocks for neuromorphic engineering and artificial neural network. With the advantages of biocompatibility, low cost, flexibility, and compatible with printing and roll-to-roll processes, the artificial synapse based on organic transistor is of great interest. In this paper, the artificial synapse simulation by ion-gel gated organic field-effect transistors (FETs) with poly(3-hexylthiophene) (P3HT) active channel is demonstrated...
October 5, 2016: ACS Applied Materials & Interfaces
B Radha, A Esfandiar, F C Wang, A P Rooney, K Gopinadhan, A Keerthi, A Mishchenko, A Janardanan, P Blake, L Fumagalli, M Lozada-Hidalgo, S Garaj, S J Haigh, I V Grigorieva, H A Wu, A K Geim
Nanometre-scale pores and capillaries have long been studied because of their importance in many natural phenomena and their use in numerous applications. A more recent development is the ability to fabricate artificial capillaries with nanometre dimensions, which has enabled new research on molecular transport and led to the emergence of nanofluidics. But surface roughness in particular makes it challenging to produce capillaries with precisely controlled dimensions at this spatial scale. Here we report the fabrication of narrow and smooth capillaries through van der Waals assembly, with atomically flat sheets at the top and bottom separated by spacers made of two-dimensional crystals with a precisely controlled number of layers...
September 7, 2016: Nature
Hyeohn Kim, Taehoon Kim, Dohun Kim, Wooyoung Shim
The assembly of micro- and nanomaterials is a key issue in the development of potential bottom-up construction of building blocks, but creating periodic arrays of such materials in an efficient and scalable manner still remains challenging. Here, we show that a cymatic assembly approach in which micro- and nanomaterials in a liquid medium that resonate at low-frequency standing waves can be used for the assembly in a spatially periodic and temporally stationary fashion that emerges from the wave displacement antinodes of the standing wave...
October 12, 2016: Nano Letters
Joshua Meyers, Michael Carter, N Yi Mok, Nathan Brown
AIM: Many medicinal chemistry-relevant structures and core scaffolds tend toward geometric planarity, which hampers the optimization of physicochemical properties desirable in drug-like molecules. As challenging drug target classes emerge, the exploitation of molecular three-dimensionality in lead optimization is becoming increasingly important. While recent interest has emphasized the importance of enhanced three-dimensionality in molecular fragment designs, the extent to which this is required in core scaffolds remains unclear...
September 2016: Future Medicinal Chemistry
Na Ji, Jeremy Freeman, Spencer L Smith
Neural circuitry has evolved to form distributed networks that act dynamically across large volumes. Conventional microscopy collects data from individual planes and cannot sample circuitry across large volumes at the temporal resolution relevant to neural circuit function and behaviors. Here we review emerging technologies for rapid volume imaging of neural circuitry. We focus on two critical challenges: the inertia of optical systems, which limits image speed, and aberrations, which restrict the image volume...
August 26, 2016: Nature Neuroscience
Y Anahory, L Embon, C J Li, S Banerjee, A Meltzer, H R Naren, A Yakovenko, J Cuppens, Y Myasoedov, M L Rappaport, M E Huber, K Michaeli, T Venkatesan, Ariando, E Zeldov
Atomically sharp oxide heterostructures exhibit a range of novel physical phenomena that are absent in the parent compounds. A prominent example is the appearance of highly conducting and superconducting states at the interface between LaAlO3 and SrTiO3. Here we report an emergent phenomenon at the LaMnO3/SrTiO3 interface where an antiferromagnetic Mott insulator abruptly transforms into a nanoscale inhomogeneous magnetic state. Upon increasing the thickness of LaMnO3, our scanning nanoSQUID-on-tip microscopy shows spontaneous formation of isolated magnetic nanoislands, which display thermally activated moment reversals in response to an in-plane magnetic field...
2016: Nature Communications
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