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https://www.readbyqxmd.com/read/28227687/characteristic-of-a-force-sensing-guide-wire-for-minimally-invasive-cardiac-surgery
#1
N Stefanova, M Hessinger, T Opitz, R Werthschutzky, N Stefanova, M Hessinger, T Opitz, R Werthschutzky, N Stefanova, M Hessinger, T Opitz
In minimal invasive cardiac surgery (MICS), the surgeon is missing haptic feedback of the guide wire for navigation through the vessels. A wide range of guide wires with various properties and performance characteristics are available to reduce the risk of complications during the intervention. This paper presents a force sensing guide wire for cardiac catheterization, which provides the surgeon a haptic feedback on the guide wire tip. Three conventional wires for the recanalization of chronic total coronary occlusions (CTO) are investigated and general design requirements for the force sensing guide wire are determined...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226251/effects-of-sulfate-on-heavy-metal-release-from-iron-corrosion-scales-in-drinking-water-distribution-system
#2
Huifang Sun, Baoyou Shi, Fan Yang, Dongsheng Wang
Trace heavy metals accumulated in iron corrosion scales within a drinking water distribution system (DWDS) could potentially be released to bulk water and consequently deteriorate the tap water quality. The objective of this study was to identify and evaluate the release of trace heavy metals in DWDS under changing source water conditions. Experimental pipe loops with different iron corrosion scales were set up to simulate the actual DWDS. The effects of sulfate levels on heavy metal release were systemically investigated...
February 13, 2017: Water Research
https://www.readbyqxmd.com/read/28225625/spin-orbit-coupling-effects-on-ligand-free-icosahedral-matryoshka-superatoms
#3
Feiyun Long, Haitao Liu, Dafang Li, Jun Yan
With the help of density functional theory, a series of matryoshka superatoms $\rm{X@Y_{12}@X_{20}}$ (X=Ge, Y=Zn; X=Sn, Y=Mg, Mn, Zn or Cd; X=Pb, Y= Mg, Mn, Cd or Hg) with icosahedral symmetry has been extensively studied, to focus on the influence of the spin-orbit coupling on geometries, stabilities, electronic structures and magnetic moments for these clusters. Generally speaking, the effect of spin-orbit coupling is highly correlated with composition elements of these clusters. $\rm{Ge@Zn_{12}@Ge_{20}}$ is little affected by the spin-orbit coupling, while clusters containing Sn atom will generally undergo a moderate influence on their atomization energy, HOMO-LUMO gap and projected density of states...
February 22, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28225585/two-step-process-to-create-roll-off-superamphiphobic-paper-surfaces
#4
Lu Jiang, Zhenguan Tang, Rahmat M Clinton, Victor Breedveld, Dennis W Hess
Surface modification of cellulose-based paper which displays roll-off properties for water and oils (surface tension ≥ 23.8 mN·m-1) and good repellency towards n-heptane (20.1 mN·m-1) is reported. Droplets of water, diiodomethane, motor oil, hexadecane and decane all "bead up", i.e. exhibit high contact angles, and roll off the treated surface under the influence of gravity. Unlike widely used approaches that rely on the deposition of nanoparticles or electrospun nanofibers to create superamphiphobic surfaces, our method generates a hierarchical structure as an inherent property of the substrate and displays good adhesion between the film and substrate...
February 22, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28225171/complete-1-h-13-c-1-h-and-31-p-nmr-spectral-parameters-of-some-pyrophosphates
#5
Esa Haapaniemi
The (1) H, (13) C{(1) H}, and (31) P NMR spectral parameters of some pyrophosphates were determined in CDCl3 . The most complicated (1) H spectrum can be solved fully only as (A3 MN)R6 XX'R6 '(MNA3 )', where R6 (= -N(CH3 )2 ) is coupled only to phosphorus (X). Second order coupling between phosphorus was found and solved with iterative analysis. A signal shape of one of the carbon resonance cannot be explained only with couplings. Explanation for exceptional shape was searched from molecular modeling results...
February 22, 2017: Magnetic Resonance in Chemistry: MRC
https://www.readbyqxmd.com/read/28225027/variable-salinity-responses-of-12-alfalfa-genotypes-and-comparative-expression-analyses-of-salt-response-genes
#6
Devinder Sandhu, Monica V Cornacchione, Jorge F S Ferreira, Donald L Suarez
Twelve alfalfa genotypes that were selected for biomass under salinity, differences in Na and Cl concentrations in shoots and K/Na ratio were evaluated in this long-term salinity experiment. The selected plants were cloned to reduce genetic variability within each genotype. Salt tolerance (ST) index of the genotypes ranged from 0.39 to 1. The most salt-tolerant genotypes SISA14-1 (G03) and AZ-90ST (G10), the top performers for biomass, exhibited the least effect on shoot number and height. SISA14-1 (G03) accumulated low Na and Cl under salinity...
February 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28224917/regulation-of-the-wheat-map-kinase-phosphatase-1-by-14-3-3-proteins
#7
Mouna Ghorbel, Valérie Cotelle, Chantal Ebel, Ikram Zaidi, Mélanie Ormancey, Jean-Philippe Galaud, Moez Hanin
Plant MAP kinase phosphatases (MKPs) are major regulators of MAPK signaling pathways and play crucial roles in controlling growth, development and stress responses. The presence of several functional domains in plant MKPs such as a dual specificity phosphatase catalytic domain, gelsolin, calmodulin-binding and serine-rich domains, suggests that MKPs can interact with distinct cellular partners, others than MAPKs. In this report, we identified a canonical mode I 14-3-3-binding motif (574KLPSLP579) located at the carboxy-terminal region of the wheat MKP, TMKP1...
April 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28223549/membranous-nephropathy-associated-with-hepatitis-c-virus-infection-treated-with-corticosteroids-and-ledipasvir-sofosbuvir-a-case-report-and-review-of-literature
#8
Qinjie Weng, Xiao Li, Hong Ren, Jingyuan Xie, Xiaoxia Pan, Jing Xu, Nan Chen
BACKGROUND: Membranous nephropathy (MN) is the most common cause of nephrotic syndrome in adults. As many clinical cases have reported, it may be associated with hepatitis C virus (HCV) infection. Antiviral therapy can be various. CASE SUMMARY: We report a case of patient with chronic HCV infection and MN, who presented with was proteinuria. He was treated with ledipasvir and sofosbuvir (Harvoni; Gilead Sciences, Foster City, CA) and was found to be virus-free. CONCLUSION: We have reported this case to provide insight into whether Ledipasvir-Sofosbuvir should be administered for HCV-related glomerulonephritis...
February 16, 2017: Oncotarget
https://www.readbyqxmd.com/read/28223356/molecular-insights-into-hydrogen-peroxide-sensing-mechanism-of-the-metalloregulator-mntr-in-controlling-bacterial-resistance-to-oxidative-stresses
#9
Zhaoyuan Chen, Xinhui Wang, Fan Yang, Qingqing Hu, Huichun Tong, Xiuzhu Dong
Manganese contributes to anti-oxidative stress particularly in catalase-devoid bacteria, and DtxR family metalloregulators, through sensing cellular Mn(2+) content, regulate its homeostasis. Here, we show that metalloregulator MntR (So-MntR) functions dually as Mn(2+) and H2O2 sensors in mediating H2O2 resistance by an oral streptococcus. H2O2 disrupted So-MntR's binding to Mn(2+) transporter mntABC promoter, and induced disulfide-linked dimerization of the protein. Mass spectrometry identified Cys11-Cys156 and Cys11-Cys11 disulfide-linked peptides in H2O2 treated So-MntR...
February 21, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28222184/ecological-and-human-health-risks-associated-with-abandoned-gold-mine-tailings-contaminated-soil
#10
Veronica Mpode Ngole-Jeme, Peter Fantke
Gold mining is a major source of metal and metalloid emissions into the environment. Studies were carried out in Krugersdorp, South Africa, to evaluate the ecological and human health risks associated with exposure to metals and metalloids in mine tailings contaminated soils. Concentrations of arsenic (As), cadmium (Cd), chromium (Cr), cobalt (Co), copper (Cu), lead (Pb), manganese (Mn), nickel (Ni), and zinc (Zn) in soil samples from the area varied with the highest contamination factors (expressed as ratio of metal or metalloid concentration in the tailings contaminated soil to that of the control site) observed for As (3...
2017: PloS One
https://www.readbyqxmd.com/read/28222153/dissecting-nutrient-related-co-expression-networks-in-phosphate-starved-poplars
#11
Mareike Kavka, Andrea Polle
Phosphorus (P) is an essential plant nutrient, but its availability is often limited in soil. Here, we studied changes in the transcriptome and in nutrient element concentrations in leaves and roots of poplars (Populus × canescens) in response to P deficiency. P starvation resulted in decreased concentrations of S and major cations (K, Mg, Ca), in increased concentrations of N, Zn and Al, while C, Fe and Mn were only little affected. In roots and leaves >4,000 and >9,000 genes were differently expressed upon P starvation...
2017: PloS One
https://www.readbyqxmd.com/read/28221038/molecular-and-electronic-structures-of-m2o7-m-mn-tc-re
#12
Keith V Lawler, Bradley C Childs, Daniel S Mast, Kenneth R Czerwinski, Alfred P Sattelberger, Frederic Poineau, Paul M Forster
The molecular and electronic structures of the group 7 heptoxides were investigated by computational methods as both isolated molecules and in the solid-state. The metal-oxygen-metal bending angle of the single molecule increased with increasing atomic number, with Re2O7 preferring a linear structure. Natural bond orbital and localized orbital bonding analyses indicate that there is a three-center covalent bond between the metal atoms and the bridging oxygen, and the increasing ionic character of the bonds favors larger bond angles...
February 21, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28220925/slow-relaxation-of-the-magnetization-observed-in-an-antiferromagnetically-ordered-phase-for-scm-based-two-dimensional-layered-compounds
#13
Koichi Kagesawa, Yuki Nishimura, Hiroki Yoshida, Brian K Breedlove, Masahiro Yamashita, Hitoshi Miyasaka
Two-dimensional layered compounds with different counteranions, [{Mn(salen)}4C6](BF4)2·2(CH3OH) (1) and [{Mn(salen)}4C6](PF6)2·2(CH3OH) (2) (salen(2-) = N,N'-bis(salicylideneiminato), C6(2-) = C6H12(COO)2(2-)), were synthesized by assembling [Mn(salen)(H2O)]X (X(-) = BF4(-) and PF6(-)) and C6H12(CO2(-))2 (C6(2-)) in a methanol/2-propanol medium. The compounds have similar structures, which are composed of Mn(salen) out-of-plane dimers bridged by μ(4)-type C6(2-) ions, forming a brick-wall-type network of [-{Mn2}-OCO-] chains alternately connected via C6H12 linkers of C6(2-) moieties...
February 21, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28220705/comparison-of-methods-for-determining-the-mechanical-properties-of-semiconducting-polymer-films-for-stretchable-electronics
#14
Daniel Rodriquez, Jae-Han Kim, Samuel E Root, Zhuping Fei, Pierre Boufflet, Martin Heeney, Taek-Soo Kim, Darren J Lipomi
This paper describes a comparison of two characterization techniques for determining the mechanical properties of thin-film organic semiconductors for applications in soft electronics. In the first method, the film is supported by water (film-on-water, FOW), and a stress-strain curve is obtained using a direct tensile test. In the second method, the film is supported by an elastomer (film-on-elastomer, FOE), and is subjected to three tests to reconstruct the key features of the stress-strain curve: the buckling test (tensile modulus), the onset of buckling (yield point), and the crack-onset strain (strain at fracture)...
February 21, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28220661/tunable-luminescence-and-energy-transfer-in-ca3-sio4-cl2-ce-3-li-mn-2-eu-2-phosphors
#15
Xiangqi Li, Xiuzhen Xie, Haiting Wei, Minzhen Zhong
A series of color-tunable Ca3-2x-y-z SiO4 Cl2 (CSC):xCe(3+) ,xLi(+) ,yMn(2+) ,zEu(2+) phosphors with low temperature phase structure was synthesized via the sol-gel method. An energy transfer process from Ce(3+) to Mn(2+) in CSC:0.01Ce(3+) ,0.01Li(+) ,yMn(2+) (y = 0.03-0.09) and the mechanism was verified to be an electric dipole-dipole interaction. The Ce(3+) and Mn(2+) emission intensities were greatly enhanced by co-doping Eu(2+) ions into CSC:0.01Ce(3+) ,0.01Li(+) ,0.07Mn(2+) phosphors due to competitive energy transfers from Eu(2+) /Ce(3+) to Mn(2+) , and Ce(3+) to Eu(2+) ...
February 21, 2017: Luminescence: the Journal of Biological and Chemical Luminescence
https://www.readbyqxmd.com/read/28220282/serum-trace-elements-are-associated-with-hemostasis-lipid-spectrum-and-inflammatory-markers-in-men-suffering-from-acute-ischemic-stroke
#16
Anatoly V Skalny, Lydmila L Klimenko, Aliya A Turna, Maria N Budanova, Ivan S Baskakov, Marina S Savostina, Aksana N Mazilina, Anatoly I Deyev, Margarita G Skalnaya, Alexey A Tinkov
The primary objective of the study is investigation of the association between trace elements status and hemostasis, lipid spectrum and inflammatory markers in acute ischemic stroke (AIS). A total of 30 men suffering from AIS and 30 healthy controls were involved in the current survey. Blood count, serum lipid spectrum, complement components C4 and C3a, vascular endothelial growth factor (VEGF), S100B protein, NR2 antibodies (NR2Ab), and total antioxidant status (TAS), as well as plasma fibrinogen, and D-dimer levels and activated partial thromboplastin time (APTT) were assessed...
February 20, 2017: Metabolic Brain Disease
https://www.readbyqxmd.com/read/28219244/an-alternative-route-to-nanoscale-aggregates-with-a-ph-responsive-random-copolymer
#17
Jonathan C Pegg, Adam Czajka, Christopher Hill, Craig James, Jocelyn Alice Peach, Sarah E Rogers, Julian Eastoe
A random copolymer, poly(methyl methacrylate-co-2-dimethylaminoethyl methacrylate) (poly(MMA-co-DMAEMA)) is shown to form nano-scale aggregates (NAs) (~20 nm) at copolymer concentrations ≥ 10 % w/w, directly from the pre-formed surfactant-stabilised latex (~120 nm) in aqueous solution. The copolymer is prepared by a conventional emulsion polymerisation. Introducing a small mole fraction of DMAEMA (~10 %) allows the copolymer hydrophilicity to be adjusted by pH and external temperature, generating NAs with tuneable sizes and defined weight-average aggregation number, as observed by dynamic-light scattering (DLS) and small-angle neutron scattering (SANS)...
February 20, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28219239/toward-ultra-low-interfacial-tension-measurement-through-jetting-dripping-transition
#18
Marie Moiré, Yannick Peysson, Benjamin Herzhaft, Nicolas Pannacci, François Gallaire, Laura Angello, Christine Dalmazzone, Andrea Fani, Annie Colin
In this paper, we present a dynamic microfluidic tensiometer able to perform measurements over more than four decades and which is suitable for high throughput experimentations. Depending on the flow rate of each phase, either droplets or jetting will be obtained. The transition between these two regimes relays on the Rayleigh-Plateau instability. This transition can be theoretically computed thanks to a linear analysis based on the convective and absolute instabilities theory. From this model, the interfacial tension between the two phases can be calculated...
February 20, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28218983/single-radial-haemolysis-compared-to-hemagglutinin-inhibition-and-microneutralization-as-a-correlate-of-protection-against-influenza-a-h3n2-in-children-and-adolescents
#19
Biao Wang, Margaret L Russell, Angela Brewer, Jennifer Newton, Pardeep Singh, Brian J Ward, Mark Loeb
BACKGROUND: Serum antibodies are often used as correlates of protection for influenza. Three commonly used serological assays for detecting influenza-specific serum antibodies are single radial haemolysis (SRH), hemagglutinin inhibition (HAI), and microneutralization (MN). However, here are limited data on SRH as well as HAI and MN as correlates of protection against influenza in children and adolescents. There are also limited data that compare SRH to HAI and MN. OBJECTIVES: We sought primarily to understand how SRH titres correlate to protection against influenza infection in children and adolescents...
February 20, 2017: Influenza and Other Respiratory Viruses
https://www.readbyqxmd.com/read/28218854/long-range-dispersion-effects-on-the-water-vapor-interface-simulated-using-the-most-common-models
#20
Marcello Sega, Christoph Dellago
The long-range contribution to dispersion forces is known to have a major impact on the properties of inhomogeneous fluids, and its correct treatment is increasingly recognized as being a necessary requirement to avoid cutoff-related artefacts. Although analytical corrections for quantities like the surface tension are known, these can not take into account the structural changes induced by the long-range contributions. Here, we analyze the interfacial properties of seven popular water models, comparing the results with the cut-off version of the dispersion potential...
February 20, 2017: Journal of Physical Chemistry. B
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