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https://www.readbyqxmd.com/read/28106419/probing-the-nodal-structure-of-landau-level-wave-functions-in-real-space
#1
J R Bindel, J Ulrich, M Liebmann, M Morgenstern
The inversion layer of p-InSb(110) obtained by Cs adsorption of 1.8% of a monolayer is used to probe the Landau level wave functions within smooth potential valleys by scanning tunneling spectroscopy at 14 T. The nodal structure becomes apparent as a double peak structure of each spin polarized first Landau level, while the zeroth Landau level exhibits a single peak per spin level only. The real space data show single rings of the valley-confined drift states for the zeroth Landau level and double rings for the first Landau level...
January 6, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28104432/relationship-between-physiological-excitatory-and-inhibitory-measures-of-excitability-in-the-left-vs-right-human-motor-cortex-and-peripheral-electrodermal-activity
#2
Martina Bracco, Patrizia Turriziani, Daniela Smirni, Renata Giuseppa Mangano, Massimiliano Oliveri
The current study was aimed at investigating the relationships of excitatory and inhibitory circuits of the left vs. right primary motor cortex with peripheral electrodermal activity (EDA). Ten healthy subjects participated in two experimental sessions. In each session, EDA was recorded for 10minutes from the palmar surface of the left hand. Immediately after EDA recording, Transcranial Magnetic Stimulation (TMS) was used to probe excitatory and inhibitory circuits of the left or right primary motor cortex using two protocols of stimulation: the input-output curve for recording of motor evoked potentials, for testing excitatory circuits; the long-interval cortical inhibition (LICI) protocol, for testing inhibitory circuits...
January 16, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28103664/relaxation-in-a-prototype-ionic-liquid-influence-of-water-on-the-dynamics
#3
David L Price, Oleg Borodin, Miguel A González, Maiko Kofu, Kaoru Shibata, Takeshi Yamada, Osamu Yamamuro, Marie-Louise Saboungi
The influence of water on the relaxation of a prototype ionic liquid (IL) C8mimBF4 is examined in the IL-rich regime combining quasi-elastic neutron scattering (QENS) and molecular dynamics (MD) simulations. The QENS and MD simulations results for relaxation of the IL and the equimolar mixture with water probed by the dynamics of the C8mim hydrogen atoms in the time range of 2 ps - 1 ns are in excellent agreement. The QENS data show that translational relaxation increases by a factor of 7 on addition of water, while rotational relaxation involving multiple processes fitted by a KWW function with low β values is speeded up by a factor of 3 on the timescale of QENS measurements...
January 20, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28072430/measurement-of-thermal-conductivity-of-porcine-liver-in-the-temperature-range-of-cryotherapy-and-hyperthermia-250-315k-by-a-thermal-sensor-made-of-a-micron-scale-enameled-copper-wire
#4
Z D Jiang, G Zhao, G R Lu
:   BACKGROUND: Cryotherapy and hyperthermia are effective treatments for several diseases, especially for liver cancers. Thermal conductivity is a significant thermal property for the prediction and guidance of surgical procedure. However, the thermal conductivities of organs and tissues, especially over the temperature range of both cryotherapy and hyperthermia are scarce. OBJECTIVE: To provide comprehensive thermal conductivity of liver for both cryotherapy and hyperthermia...
November 2016: Cryo Letters
https://www.readbyqxmd.com/read/28065982/circular-photogalvanic-effect-in-organometal-halide-perovskite-ch3nh3pbi3
#5
Junwen Li, Paul M Haney
We study the circular photogalvanic effect in the organometal halide perovskite solar cell absorber CH3NH3PbI3. The calculated photocurrent density for a system with broken inversion symmetry is about 10(-9) A/W, comparable to the previously studied quantum well and bulk Rashba systems. The circular photogalvanic effect relies on inversion symmetry breaking, so that by tuning the optical penetration depth, the degree of inversion symmetry breaking can be probed at different depths from the sample surface. We propose that measurements of this effect may clarify the presence or absence of inversion symmetry, which remains a controversial issue and has been argued to play an important role in the high conversion efficiency of this material...
November 2016: Applied Physics Letters
https://www.readbyqxmd.com/read/28065927/the-composite-water-and-solute-transport-of-barley-hordeum-vulgare-roots-effect-of-suberized-barriers
#6
Kosala Ranathunge, Yangmin X Kim, Friedrich Wassmann, Tino Kreszies, Viktoria Zeisler, Lukas Schreiber
BACKGROUND AND AIMS: Roots have complex anatomical structures, and certain localized cell layers develop suberized apoplastic barriers. The size and tightness of these barriers depend on the growth conditions and on the age of the root. Such complex anatomical structures result in a composite water and solute transport in roots. METHODS: Development of apoplastic barriers along barley seminal roots was detected using various staining methods, and the suberin amounts in the apical and basal zones were analysed using gas chromatography-mass spectometry (GC-MS)...
January 8, 2017: Annals of Botany
https://www.readbyqxmd.com/read/28064285/unusual-duplication-in-the-pericentromeric-region-of-chromosome-9-in-a-patient-with-phenotypic-alterations
#7
Andréa C M Malinverni, Mileny E Colovati, Ana B A Perez, Thamy P Caneloi, Hélio R Oliveira, Nadezda Kosyakova, Thomas Liehr, Ahmed B Hamid, Maria I Melaragno
Several alterations involving the pericentromeric region of chromosome 9 are considered as normal population variants. These heterochromatic variants or heteromorphisms can include 9qh+, 9cen+, 9ph+, 9ph-, inv(9)(p11q13), and other patterns which can only be defined by FISH studies. However, some heteromorphisms have been found more frequently in patients with several clinical disorders. Here, we report on a patient with intellectual disability, language and neurodevelopmental delay, as well as facial dysmorphism and an unusual chromosome 9...
January 7, 2017: Cytogenetic and Genome Research
https://www.readbyqxmd.com/read/28059332/probe-of-symmetry-reduction-at-domain-walls-by-nonlinear-cherenkov-measurement
#8
Bang Liu, Yuanlin Zheng, Xiaohui Zhao, Haigang Liu, Xianfeng Chen
We report on the investigation of symmetrical properties of lithium niobate (LiNbO<sub>3</sub>) domain walls utilizing the nonlinear Cherenkov radiation. Compared with LiNbO<sub>3</sub> bulk crystals, new nonzero elements of the χ<sup>(2)</sup> tensor at domain walls are found by the Cherenkov second harmonic generation (CSHG) and Cherenkov sum frequency generation (CSFG) measurement. Experimentally, we demonstrate the symmetry reduction of domain walls, where the mirror inversion symmetry of LiNbO<sub>3</sub> lattice is broken while the threefold rotational symmetry still remains...
December 26, 2016: Optics Express
https://www.readbyqxmd.com/read/28056528/spectrum-of-molecular-defects-in-216-chinese-families-with-hemophilia-a
#9
Zhiping Guo, Linhua Yang, Xiuyu Qin, Xiue Liu, Yaofang Zhang
Hemophilia A (HA) is an X-linked bleeding disorder caused by heterogeneous mutations in the factor VIII gene ( F8). Our aim is to identify the causative mutations in a large HA cohort from China. We studied 216 unrelated HA families. Molecular analyses of F8 were performed using a combination of molecular techniques, including polymerase chain reaction, direct sequencing, and multiplex ligation-dependent probe amplification. The deleterious consequences of the unreported missense mutations were evaluated using various bioinformatics approaches...
January 1, 2017: Clinical and Applied Thrombosis/hemostasis
https://www.readbyqxmd.com/read/28056165/probing-a-general-rule-towards-thermodynamic-stabilities-of-mono-bn-doped-lower-polyenes
#10
Alvi Muhammad Rouf, Jingjing Wu, Jun Zhu
The BN-doped organic analogues are interesting as aliphatic amineboranes for hydrogen storage, precursors for aromatic borazines and adsorbent cage azaboranes. However, BN-doped aliphatic polyenes remained undeveloped. Herein, we perform theoretical calculations on two mono BN-doped aliphatic lower polyenes, 1,3-butadiene and 1,3,5-hexatriene. A general rule is proposed, i.e., isomers with terminal nitrogen and directly BN-connected, N-B(R), in particular, are of significant thermodynamic stability than their inverse analogues (where boron is at the terminal position)...
January 5, 2017: Chemistry, An Asian Journal
https://www.readbyqxmd.com/read/28048696/mo-fg-campus-iep3-01-evaluation-of-specific-absorption-rate-and-temperature-increase-induced-by-artificial-medical-implants-during-mri-scan
#11
Y Seo
PURPOSE: Heating of patients or burning of biological tissues around medical implants by RF power during MRI scan is a significant patient safety concern. The purpose of this study is to not only measure SAR values, but also RF-induced temperature elevation due to artificial hip joints during MRI scans. METHODS: SAR measurement experiment was performed on three discrete manufacturers at 1.5 and 3T. Three MRI RF sequences (T1w TSE, T2w inversion recovery, and T2w TSE) with imaging parameters were selected...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047507/su-f-i-27-measurement-of-sar-and-temperature-elevation-during-mri-scans
#12
Y Seo
PURPOSE: The poor reliability and repeatability of the manufacturer-reported SAR values on clinical MRI systems have been acknowledged. The purpose of this study is to not only measure SAR values, but also RF-induced temperature elevation at 1.5 and 3T MRI systems. METHODS: SAR measurement experiment was performed at 1.5 and 3T. Three MRI RF sequences (T1w TSE, T1w inversion recovery, and T2w TSE) with imaging parameters were selected. A hydroxyl-ethylcelluose (HEC) gelled saline phantom mimicking human body tissue was made...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28045247/directed-evolution-of-key-residues-in-fluorescent-protein-inverses-the-polarity-of-voltage-sensitivity-in-the-genetically-encoded-indicator-arclight
#13
Jelena Platisa, Ganesh Vasan, Amy Yang, Vincent Allen Pieribone
Genetically encoded calcium indicators (GECIs) produce unprecedentedly large signals that have enabled routine optical recording of single neuron activity in vivo in rodent brain. Genetically encoded voltage indicators (GEVIs) offer a more direct measure of neuronal electrical status, however the signal to noise characteristics and signal polarity of the probes developed to date have precluded routine use in vivo. We applied directed evolution to target modulable areas of the fluorescent protein in GEVI ArcLight to create the first GFP-based GEVI (Marina) that exhibits a ∆F/∆V with a positive slope relationship...
January 3, 2017: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/28042924/nanotribological-investigation-of-polymer-brushes-with-lithographically-defined-and-systematically-varying-grafting-densities
#14
Zhenyu J Zhang, Mark Moxey, Abdullah Alswieleh, Steven P Armes, Andrew L Lewis, Mark Geoghegan, Graham J Leggett
Following controlled photodeprotection of a 2-nitrophenylpropyloxycarbonyl-protected (aminopropyl)triethoxysilane (NPPOC-APTES) film and subsequent derivatization with a bromoester-based initiator, poly(2-(methacryloyloxy)ethylphosphorylcholine) (PMPC) brushes with various grafting densities were grown from planar silicon substrates using atom transfer radical polymerization (ATRP). The grafting density correlated closely with the extent of deprotection of the NPPOC-APTES. The coefficient of friction for such PMPC brushes was measured by friction force microscopy in water and found to be inversely proportional to the grafting density due to the osmotic pressure that resists deformation...
January 12, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28038959/minispectrometer-with-handheld-probe-for-5-ala-based-fluorescence-guided-surgery-of-brain-tumors-preliminary-study-for-clinical-applications
#15
J F Cornelius, J M Placke, J Knipps, I Fischer, M Kamp, H J Steiger
INTRODUCTION: Recently a mini-spectrometer with a handheld probe quantifying 5-aminolevulinic acid (5-ALA) based fluorescence intensity of brain tumors was developped by Kim and co-workers to improve fluorescence-guided neurosurgery. OBJECTIVE: To evaluate if this new tool is capable to discriminate nuances of fluorescence intensity of strongly fluorescing tumors (glioblastomas (GBM) and meningiomas (MM)). To study different modes of measurement (touch/no-touch)...
December 27, 2016: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/28033707/unique-combination-of-surface-energy-and-lewis-acid-base-characteristics-of-superhydrophobic-cellulose-fibres
#16
José António Ferreira Gamelas, Alejandro Salvador, Jokin Hidalgo, Paulo J Ferreira, Álvaro Tejado
Cellulose fibres were first functionalized on the surface by silanization with trichloromethylsilane in an optimized gas-solid reaction and the occurrence of the reaction assessed by ATR-FTIR. Then, changes in the physicochemical surface properties of the material were thoroughly assessed by using inverse gas chromatography (IGC) and X-ray photoelectron spectroscopy as surface specific tools. A very surprising combination of results was obtained: (i) the dispersive component of the surface energy was found to decrease from 42 mJ m-2 to 14 mJ m-2 (at 40 ºC), the latter figure presenting as one of the lowest values ever reported (by IGC) for cellulose-based materials and (ii) both Lewis acidic and Lewis basic characters of the fibres surface, as measured by the injection into the IGC columns of 15 different vapour probes, significantly increased with silanization...
December 29, 2016: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28027029/mechanisms-of-chromosomal-diversification-in-species-of-rineloricaria-actinopterygii-siluriformes-loricariidae
#17
Cleberson C Primo, Larissa Glugoski, Mara C Almeida, Cláudio H Zawadzki, Orlando Moreira-Filho, Marcelo R Vicari, Viviane Nogaroto
Cytogenetic studies in fish of the Rineloricaria genus have already shown a high variation in diploid number (2n). Along with fusion/fission events for 2n alteration, inversions contribute to the diversification of chromosome formulae within this group. The present study assessed different populations/species of the Rineloricaria aiming to describe the karyotype organization of its members and understand the mechanisms that lead to the variation of chromosome numbers. Cytogenetic data showed distinct karyotype organization among Rineloricaria populations/species studied, ranging in diploid number from 46 to 64 chromosomes, syntopic species and two karyomorphs in Rineloricaria pentamaculata...
December 27, 2016: Zebrafish
https://www.readbyqxmd.com/read/28005337/colloidal-synthesis-of-bipolar-off-stoichiometric-gallium-iron-oxide-spinel-type-nanocrystals-with-near-ir-plasmon-resonance
#18
Carmine Urso, Mariam Barawi, Roberto Gaspari, Gianluca Sirigu, Ilka Kriegel, Margherita Zavelani-Rossi, Francesco Scotognella, Michele Manca, Mirko Prato, Luca De Trizio, Liberato Manna
We report the colloidal synthesis of ∼5.5 nm inverse spinel-type oxide Ga2FeO4 (GFO) nanocrystals (NCs) with control over the gallium and iron content. As recently theoretically predicted, some classes of spinel-type oxide materials can be intrinsically doped by means of structural disorder and/or change in stoichiometry. Here we show that, indeed, while stoichiometric Ga2FeO4 NCs are intrinsic small bandgap semiconductors, off-stoichiometric GFO NCs, produced under either Fe-rich or Ga-rich conditions, behave as degenerately doped semiconductors...
January 10, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28000731/electronic-structure-of-the-kitaev-material-%C3%AE-rucl3-probed-by-photoemission-and-inverse-photoemission-spectroscopies
#19
Soobin Sinn, Choong Hyun Kim, Beom Hyun Kim, Kyung Dong Lee, Choong Jae Won, Ji Seop Oh, Moonsup Han, Young Jun Chang, Namjung Hur, Hitoshi Sato, Byeong-Gyu Park, Changyoung Kim, Hyeong-Do Kim, Tae Won Noh
Recently, α-RuCl3 has attracted much attention as a possible material to realize the honeycomb Kitaev model of a quantum-spin-liquid state. Although the magnetic properties of α-RuCl3 have been extensively studied, its electronic structure, which is strongly related to its Kitaev physics, is poorly understood. Here, the electronic structure of α-RuCl3 was investigated by photoemission (PE) and inverse-photoemission (IPE) spectroscopies. The band gap was directly measured from the PE and IPE spectra and was found to be 1...
December 21, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27984605/-genetic-analysis-for-a-family-affected-with-hemophilia-type-a-due-to-a-large-deletion-of-f8-gene
#20
Nan Bai, Shiyue Mei, Ning Liu, Zhenhua Zhao, Jingjing Meng, Xiangdong Kong
OBJECTIVE: To detect potential mutation of F8 gene in a family affected with hemophilia type A. METHODS: Inverse-shifting PCR (IS-PCR), next-generation sequencing (NGS), multiplex ligation-dependent probe amplification (MLPA), and short tandem repeat (STR) assays were used. RESULTS: IS-PCR showed that no inversion of F8 gene has occurred in the family. NGS detected no point mutation or small InDel in the proband, but suggested that the exon 2 of the F8 gene may be deleted...
December 10, 2016: Zhonghua Yi Xue Yi Chuan Xue za Zhi, Zhonghua Yixue Yichuanxue Zazhi, Chinese Journal of Medical Genetics
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