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https://www.readbyqxmd.com/read/28227853/fast-submicrometer-scale-imaging-of-whole-zebrafish-using-the-knife-edge-scanning-microscope
#1
Daniel E Miller, Raj S Shah, Wencong Zhang, Jaewook Yoo, Jaerock Kwon, David Mayerich, John Keyser, Louise C Abbott, Yoonsuck Choe, Daniel E Miller, Raj S Shah, Wencong Zhang, Jaewook Yoo, Jaerock Kwon, David Mayerich, John Keyser, Louise C Abbott, Yoonsuck Choe, Jaewook Yoo, Louise C Abbott, Wencong Zhang, John Keyser, Raj S Shah, Daniel E Miller, Jaerock Kwon, David Mayerich, Yoonsuck Choe
Advances in high-resolution 3D microscopy have enabled the investigation of subcellular microstructures in biological specimen. For a full understanding of the organism's structure and function, it is mandatory to obtain data from the whole animal, not just parts of it. In this paper, we present our work with the Knife-Edge Scanning Microscope (KESM) for imaging a Nissl-stained whole zebrafish larva. KESM combines a diamond microtome and line-scan imaging for simultaneous sectioning and imaging in 3D. We show that using the KESM, a zebrafish, less than 3 mm long and diameter less than 500 μm, can be imaged within 1 hour at a resolution of 0...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226436/optimizing-rtms-treatment-of-a-balance-disorder-with-eeg-neural-synchrony-and-functional-connectivity
#2
Guofa Shou, Han Yuan, Diamond Urbano, Yoon-Hee Cha, Lei Ding, Guofa Shou, Han Yuan, Diamond Urbano, Yoon-Hee Cha, Lei Ding, Han Yuan, Yoon-Hee Cha, Diamond Urbano, Lei Ding, Guofa Shou
Repetitive transcranial magnetic stimulation (rTMS) has been increasingly used for its potential treatment effects across diverse mental disorders. However, the treatment effect is elusive and the rate of positive responders is not high, which make it in great demand of optimizing rTMS protocols to improve the treatment effects and the rate. In this regard, neural activity guided optimization has indicated great potential in several neuroimaging studies. In this paper, we present our ongoing work on optimizing rTMS treatment of a balance disorder, i...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28225759/crystallization-of-silicon-dioxide-and-compositional-evolution-of-the-earth-s-core
#3
Kei Hirose, Guillaume Morard, Ryosuke Sinmyo, Koichio Umemoto, John Hernlund, George Helffrich, Stéphane Labrosse
The Earth's core is about ten per cent less dense than pure iron (Fe), suggesting that it contains light elements as well as iron. Modelling of core formation at high pressure (around 40-60 gigapascals) and high temperature (about 3,500 kelvin) in a deep magma ocean predicts that both silicon (Si) and oxygen (O) are among the impurities in the liquid outer core. However, only the binary systems Fe-Si and Fe-O have been studied in detail at high pressures, and little is known about the compositional evolution of the Fe-Si-O ternary alloy under core conditions...
February 22, 2017: Nature
https://www.readbyqxmd.com/read/28224450/artificial-neural-network-based-model-enhances-risk-stratification-and-reduces-non-invasive-cardiac-stress-imaging-compared-to-diamond-forrester-and-morise-risk-assessment-models-a-prospective-study
#4
Hussain A Isma'eel, George E Sakr, Mustapha Serhan, Nader Lamaa, Ayman Hakim, Paul C Cremer, Wael A Jaber, Torkom Garabedian, Imad Elhajj, Antoine B Abchee
BACKGROUND: Coronary artery disease (CAD) accounts for more than half of all cardiovascular events. Stress testing remains the cornerstone for non-invasive assessment of patients with possible or known CAD. Clinical utilization reviews show that most patients presenting for evaluation of stable CAD by stress testing are categorized as low risk prior to the test. Attempts to enhance risk stratification of individuals who are sent for stress testing seem to be more in need today. The present study compares artificial neural networks (ANN)-based prediction models to the other risk models being used in practice (the Diamond-Forrester and the Morise models)...
February 21, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28222903/modified-mrna-vaccines-protect-against-zika-virus-infection
#5
Justin M Richner, Sunny Himansu, Kimberly A Dowd, Scott L Butler, Vanessa Salazar, Julie M Fox, Justin G Julander, William W Tang, Sujan Shresta, Theodore C Pierson, Giuseppe Ciaramella, Michael S Diamond
The emergence of ZIKV infection has prompted a global effort to develop safe and effective vaccines. We engineered a lipid nanoparticle (LNP) encapsulated modified mRNA vaccine encoding wild-type or variant ZIKV structural genes and tested immunogenicity and protection in mice. Two doses of modified mRNA LNPs encoding prM-E genes that produced virus-like particles resulted in high neutralizing antibody titers (∼1/100,000) that protected against ZIKV infection and conferred sterilizing immunity. To offset a theoretical concern of ZIKV vaccines inducing antibodies that cross-react with the related dengue virus (DENV), we designed modified prM-E RNA encoding mutations destroying the conserved fusion-loop epitope in the E protein...
February 16, 2017: Cell
https://www.readbyqxmd.com/read/28218843/gaussian-based-coupled-cluster-theory-for-the-ground-state-and-band-structure-of-solids
#6
James McClain, Qiming Sun, Garnet Kin-Lic Chan, Timothy C Berkelbach
We present the results of Gaussian-based ground-state and excited-state equation-of-motion coupled-cluster theory with single and double excitations for three-dimensional solids. We focus on diamond and silicon, which are paradigmatic covalent semiconductors. In addition to ground-state properties (the lattice constant, bulk modulus, and cohesive energy), we compute the quasiparticle band structure and band gap. We sample the Brillouin zone with up to 64 k-points using norm-conserving pseudopotentials and polarized double- and triple-zeta basis sets, leading to canonical coupled-cluster calculations with as many as 256 electrons in 2,176 orbitals...
February 20, 2017: Journal of Chemical Theory and Computation
https://www.readbyqxmd.com/read/28218441/reduction-of-dislocations-in-single-crystal-diamond-by-lateral-growth-over-a-macroscopic-hole
#7
Alexandre Tallaire, Ovidiu Brinza, Vianney Mille, Ludovic William, Jocelyn Achard
A low dislocation diamond is obtained by homoepitaxial chemical vapor deposition on a standard moderate quality substrate hollowed out by a large square hole. Dislocations are found to propagate vertically and horizontally from the substrate and to terminate at the top surface or at the sides of the hole, thus leaving the central part with a strongly reduced dislocation density.
February 20, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28218237/coherent-control-of-a-strongly-driven-silicon-vacancy-optical-transition-in-diamond
#8
Yu Zhou, Abdullah Rasmita, Ke Li, Qihua Xiong, Igor Aharonovich, Wei-Bo Gao
The ability to prepare, optically read out and coherently control single quantum states is a key requirement for quantum information processing. Optically active solid-state emitters have emerged as promising candidates with their prospects for on-chip integration as quantum nodes and sources of coherent photons connecting these nodes. Under a strongly driving resonant laser field, such quantum emitters can exhibit quantum behaviour such as Autler-Townes splitting and the Mollow triplet spectrum. Here we demonstrate coherent control of a strongly driven optical transition in silicon vacancy centre in diamond...
February 20, 2017: Nature Communications
https://www.readbyqxmd.com/read/28218234/durability-enhanced-two-dimensional-hole-gas-of-c-h-diamond-surface-for-complementary-power-inverter-applications
#9
Hiroshi Kawarada, Tetsuya Yamada, Dechen Xu, Hidetoshi Tsuboi, Yuya Kitabayashi, Daisuke Matsumura, Masanobu Shibata, Takuya Kudo, Masafumi Inaba, Atsushi Hiraiwa
Complementary power field effect transistors (FETs) based on wide bandgap materials not only provide high-voltage switching capability with the reduction of on-resistance and switching losses, but also enable a smart inverter system by the dramatic simplification of external circuits. However, p-channel power FETs with equivalent performance to those of n-channel FETs are not obtained in any wide bandgap material other than diamond. Here we show that a breakdown voltage of more than 1600 V has been obtained in a diamond metal-oxide-semiconductor (MOS) FET with a p-channel based on a two-dimensional hole gas (2DHG)...
February 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28217750/novamene-a-new-class-of-carbon-allotropes
#10
Larry A Burchfield, Mohamed Al Fahim, Richard S Wittman, Francesco Delodovici, Nicola Manini
We announce a new class of carbon allotropes. The basis of this new classification resides on the concept of combining hexagonal diamond (sp(3) bonded carbon - lonsdaleite) and ring carbon (sp(2) bonded carbon - graphene). Since hexagonal diamond acts as an insulator and sp(2) bonded rings act as conductors, these predicted materials have potential applications for transistors and other electronic components. We describe the structure of a proposed series of carbon allotropes, novamene, and carry out a detailed computational analysis of the structural and electronic properties of the simplest compound in this class: the single-ring novamene...
February 2017: Heliyon
https://www.readbyqxmd.com/read/28216841/effect-of-simulated-chairside-grinding-procedures-using-commercially-available-abrasive-agents-on-the-surface-properties-of-zirconia
#11
Ramandeep Sandhu, Mohit Kheur, Supriya Kheur
AIM: The aim of the present study was to assess the change in physical properties (surface roughness, surface hardness and phase transformation) after surface grinding of zirconia by using three commercially available abrasives. MATERIALS AND METHODS: Thirty sintered zirconia specimens were prepared and divided into three groups namely Group M (grinded using Mani Dia diamond bur standard grit), Group T (grinded using Tri Hawk diamond bur coarse grit) and Group P (grinded using Predator carbide bur)...
January 2017: Journal of Indian Prosthodontic Society
https://www.readbyqxmd.com/read/28215832/variation-in-the-clinical-and-genetic-evaluation-of-undervirilized-boys-with-bifid-scrotum-and-hypospadias
#12
J M Swartz, R Ciarlo, E Denhoff, A Abrha, D A Diamond, J N Hirschhorn, Y-M Chan
BACKGROUND: Bifid scrotum and hypospadias can be signs of undervirilization, yet boys presenting with these findings often do not undergo genetic evaluation. In some cases, identifying an underlying genetic diagnosis can help to optimize clinical care and improve guidance given to patients and families. OBJECTIVES: The aim of this study was to characterize current practice for genetic evaluation of patients with bifid scrotum, and to identify approaches with a good diagnostic yield...
January 30, 2017: Journal of Pediatric Urology
https://www.readbyqxmd.com/read/28214733/flexible-camphor-diamond-like-carbon-coating-on-polyurethane-to-prevent-candida-albicans-biofilm-growth
#13
Thaisa B Santos, Angela A Vieira, Luciana O Paula, Everton D Santos, Polyana A Radi, Sônia Khouri, Homero S Maciel, Rodrigo S Pessoa, Lucia Vieira
Camphor was incorporated in diamond-like carbon (DLC) films to prevent the Candida albicans yeasts fouling on polyurethane substrates, which is a material commonly used for catheter manufacturing. The camphor:DLC and DLC film for this investigation was produced by plasma enhanced chemical vapor deposition (PECVD), using an apparatus based on the flash evaporation of organic liquid (hexane) containing diluted camphor for camphor:DLC and hexane/methane, mixture for DLC films. The film was deposited at a low temperature of less than 25°C...
February 16, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28211564/the-genomics-of-inherited-bone-marrow-failure-from-mechanism-to-the-clinic
#14
REVIEW
Talia Wegman-Ostrosky, Sharon A Savage
The inherited bone marrow failure syndromes (IBMFS) typically present with significant cytopenias in at least one haematopoietic cell lineage that may progress to pancytopenia, and are associated with increased risk of cancer. Although the clinical features of the IBMFS are often diagnostic, variable disease penetrance and expressivity may result in diagnostic dilemmas. The discovery of the genetic aetiology of the IBMFS has been greatly facilitated by next-generation sequencing methods. This has advanced understanding of the underlying biology of the IBMFS and been essential in improving clinical management and genetic counselling for affected patients...
February 17, 2017: British Journal of Haematology
https://www.readbyqxmd.com/read/28211262/superlight-and-superflexible-three-dimensional-semiconductor-frameworks-a-x%C3%A2-y-4-a-si-ge-x-y-c-b-n-with-tunable-optoelectronic-and-mechanical-properties-from-first-principles
#15
Xinrui Cao, Xiao-Fei Li, Zi-Zhong Zhu
Silicon carbide materials as the leading wide-bandgap semiconductor holds significant importance in semiconductor technologies. Here, diamond-like three-dimensional (3D) materials with low density but high elasticity properties have been designed from first-principles calculations. They are porous single-crystalline materials composed of sp3-hybridized Si (or Ge) and sp-type C≡C (or B≡N) linear moieties, while their stabilities are found to be comparable to the recently prepared SiC4 materials. Moreover, we find that such wide-bandgap semiconductors have strong absorption in a wide range of UV region and exhibit superlight, superflexible, and incompressible mechanical properties, and their optoelectronic and mechanical properties can be well tuned via structural modifications...
February 17, 2017: Chemistry, An Asian Journal
https://www.readbyqxmd.com/read/28209890/electrical-detection-of-diamond-defects
#16
Ian S Osborne
No abstract text is available yet for this article.
February 17, 2017: Science
https://www.readbyqxmd.com/read/28208240/application-toward-confocal-full-field-microscopic-x-ray-absorption-near-edge-structure-spectroscopy
#17
Pieter Tack, Bart Vekemans, Brecht Laforce, Jennifer Rudloff-Grund, Willinton Y Hernández, Jan Garrevoet, Gerald Falkenberg, Frank Brenker, Pascal Van Der Voort, Laszlo Vincze
Using X-ray absorption near edge structure (XANES) spectroscopy, information on the local chemical structure and oxidation state of an element of interest can be acquired. Conventionally, this information can be obtained in a spatially resolved manner by scanning a sample through a focused X-ray beam. Recently, full-field methods have been developed to obtain direct 2D chemical state information by imaging a large sample area. These methods are usually in transmission mode, thus restricting the use to thin and transmitting samples...
February 7, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28207910/a-single-mutation-in-the-envelope-protein-modulates-flavivirus-antigenicity-stability-and-pathogenesis
#18
Leslie Goo, Laura A VanBlargan, Kimberly A Dowd, Michael S Diamond, Theodore C Pierson
The structural flexibility or 'breathing' of the envelope (E) protein of flaviviruses allows virions to sample an ensemble of conformations at equilibrium. The molecular basis and functional consequences of virus conformational dynamics are poorly understood. Here, we identified a single mutation at residue 198 (T198F) of the West Nile virus (WNV) E protein domain I-II hinge that regulates virus breathing. The T198F mutation resulted in a ~70-fold increase in sensitivity to neutralization by a monoclonal antibody targeting a cryptic epitope in the fusion loop...
February 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28207260/theoretical-investigations-of-the-reactions-of-n-and-o-containing-species-on-a-c-100-h-2%C3%A3-1-reconstructed-diamond-surface
#19
Mark W Kelly, Sarah C Halliwell, W Jeff Rodgers, Jason D Pattle, Jeremy N Harvey, Michael N R Ashfold
Quantum mechanical and hybrid quantum mechanical/molecular mechanical (QM/MM) cluster models have been used to investigate possible reaction mechanisms whereby gas phase NHx (x = 0-2), CNHx (x = 0, 1) and OH radicals can add to, and incorporate in, a C-C dimer bond on the C(100):H 21 diamond surface during chemical vapor deposition from microwave activated C/H containing gas mixtures containing trace amounts of added N or O. Three N incorporation routes are identified, initiated by N, NH and CN(H) addition to a surface radical site, whereas only OH addition was considered as the precursor to O incorporation...
February 16, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28203013/-curing-mode-of-universal-adhesives-affects-the-bond-strength-of-resin-cements-to-dentin
#20
Z R Fu, F C Tian, L Zhang, B Han, X Y Wang
OBJECTIVE: To determine the effects of curing mode of one-step and two-step universal adhesives on the micro-tensile bond strength (μTBS) of different dual-cure resin cements to dentin. METHODS: One-step universal adhesive Single Bond Universal (SBU), and two-step universal adhesive OptiBond Versa (VSA) were chosen as the subjects, one-step self-etching adhesive OptiBond All in One (AIO) and two-step self-etching adhesive Clearfil SE Bond (SEB) were control groups, and two dual-cure resin cements RelyX Ultimate (RLX) and Nexus 3 Universal (NX3) were used in this study...
February 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
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