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https://www.readbyqxmd.com/read/28098445/circular-and-chainlike-copper-ii-lanthanide-iii-complexes-generated-by-assembly-reactions-of-racemic-and-chiral-copper-ii-cross-linking-ligand-complexes-with-ln-iii-no3-3%C3%A2-6h2o-ln-iii-gd-iii-tb-iii-dy-iii
#1
Takahiro Ueno, Takeshi Fujinami, Naohide Matsumoto, Masaki Furusawa, Ryo Irie, Nazzareno Re, Takuya Kanetomo, Takayuki Ishida, Yukinari Sunatsuki
The 1:1 assembly reaction of the racemic form of the cross-linking ligand complex Na[Cu(II)L(dpen(1R2R/1S2S))] with Ln(III)(NO3)3·6H2O gave the centrosymmetric circular (Cu(II)Ln(III))2 complex [Cu(II)L(dpen(1R2R/1S2S))Ln(III)(NO3)2]2 (1Ln: Ln = Gd, Tb, Dy), while the reaction of the enantiopure form Na[Cu(II)L(dpen(1R2R))] with Ln(III)(NO3)3·6H2O gave the chiral chainlike (Cu(II)Ln(III))1∞ complex [Cu(II)L(dpen(1R2R))Ln(III)(NO3)2(CH3CN)]1∞·CH3CN (2Ln: Ln = Gd, Tb, Dy), where {Cu(II)L(dpen(1R2R))}(-) is (N-((1R,2R)-2-(((E)-3-ethoxy-2-oxybenzylidene)amino)-1,2-diphenylethyl)-2-oxybenzamide)copper(II) and {Cu(II)L(dpen(1R2R/1S2S))}(-) is the racemic mixture of {Cu(II)L(dpen(1R2R))}(-) and {Cu(II)L(dpen(1S2S))}(-)...
January 18, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28098440/corrosion-protection-of-copper-using-al2o3-tio2-zno-hfo2-and-zro2-atomic-layer-deposition
#2
James S Daubert, Grant T Hill, Hannah N Gotsch, Antoine P Gremaud, Jennifer S Ovental, Philip S Williams, Christopher J Oldham, Gregory N Parsons
Atomic layer deposition (ALD) is a viable means to add corrosion protection to copper metal. Ultrathin films of Al2O3, TiO2, ZnO, HfO2, and ZrO2 were deposited on copper metal using ALD, and their corrosion protection properties were measured using electrochemical impedance spectroscopy (EIS) and linear sweep voltammetry (LSV). Analysis of ∼50 nm thick films of each metal oxide demonstrated low electrochemical porosity and provided enhanced corrosion protection from aqueous NaCl solution. The surface pretreatment and roughness was found to affect the extent of the corrosion protection...
January 18, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28096233/role-of-the-constant-region-domain-in-the-structural-diversity-of-human-antibody-light-chains
#3
Emi Hifumi, Hiroaki Taguchi, Ryuichi Kato, Taizo Uda
Issues regarding the structural diversity (heterogeneity) of an antibody molecule have been the subject of discussion along with the development of antibody drugs. Research on heterogeneity has been extensive in recent years, but no clear solution has been reached. Heterogeneity is also observed in catalytic antibody κ light chains (CLs). In this study, we investigated how the constant region domain of CLs concerns structural diversity because it is a simple and good example for elucidating heterogeneity. By means of cation-exchange chromatography, SDS-PAGE, and 2-dimensional electrophoresis for the CL, multimolecular forms consisting of different electrical charges and molecular sizes coexisted in the solution, resulting in the similar heterogeneity of the full length of CLs...
January 17, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28094856/percent-depth-doses-and-x-ray-beam-characterizations-of-a-fluoroscopic-system-incorporating-copper-filtration
#4
Kevin A Wunderle, Andrew R Godley, Zhilei Liu Shen, Joseph T Rakowski, Frank F Dong
PURPOSE: In this investigation, we sought to characterize X-ray beam qualities and quantify percent depth dose (PDD) curves for fluoroscopic X-ray beams incorporating added copper (Cu) filtration, such as those commonly used in fluoroscopically guided interventions (FGI). The intended application of this research is for dosimetry in soft tissue from FGI procedures using these data. METHODS: All measurements in this study were acquired on a Siemens (Erlangen, Germany) Artis zeego fluoroscope...
January 17, 2017: Medical Physics
https://www.readbyqxmd.com/read/28094358/ascorbate-as-a-pro-oxidant-mild-n-terminal-modification-with-vinylboronic-acids
#5
Jun Ohata, Zachary T Ball
We describe divergent reactivity of vinylboronic acids for protein modification. In addition to previously reported copper-catalyzed backbone N-H modification, ascorbate in air mediates N-terminal functionalization with the same vinylboronate reagents. This mild and selective aqueous reactivity enables selective single-modification of the B chain of human insulin.
January 17, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28094025/mechanical-and-microbiological-properties-and-drug-release-modeling-of-an-etch-and-rinse-adhesive-containing-copper-nanoparticles
#6
M F Gutiérrez, P Malaquias, T P Matos, A Szesz, S Souza, J Bermudez, A Reis, A D Loguercio, P V Farago
OBJECTIVES: To evaluate the effect of addition of copper nanoparticles (CN) at different concentrations into a two-step etch-and-rinse (2-ER) adhesive on antimicrobial activity (AMA), copper release (CR), ultimate tensile strength (UTS), degree of conversion (DC), water sorption (WS), solubility (SO), as well as the immediate (IM) and 1-year resin-dentin bond strength (μTBS) and nanoleakage (NL). METHODS: Seven adhesives were formulated according to the addition of CN (0, 0...
January 13, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28093470/active-site-maturation-and-activity-of-the-copper-radical-oxidase-glxa-is-governed-by-a-tryptophan-residue
#7
Amanda K Chaplin, Dimitri A Svistunenko, Michael Hough, Michael T Wilson, Erik Vijgenboom, Jonathan Ar Worrall
GlxA from Streptomyces lividans is a mononuclear copper-radical oxidase and a member of the auxiliary activity family 5 (AA5). Its domain organisation and low sequence homology make it a distinct member of the AA5 family in which the fungal galactose 6-oxidase (Gox) is the best-characterized. GlxA is a key cuproenzyme in the copper-dependent morphological development of S. lividans with a function that is linked to the processing of an extracytoplasmic glycan. The catalytic site in GlxA and Gox contain two distinct one-electron acceptors comprising the copper ion and a 3'-(S-cysteinyl) tyrosine...
January 16, 2017: Biochemical Journal
https://www.readbyqxmd.com/read/28081364/relative-contributions-of-copper-oxide-nanoparticles-and-dissolved-copper-to-cu-uptake-kinetics-of-gulf-killifish-fundulus-grandis-embryos
#8
Chuanjia Jiang, Benjamin T Castellon, Cole W Matson, George R Aiken, Heileen Hsu-Kim
The toxicity of soluble metal-based nanomaterials may be due to the uptake of metals in both dissolved and nanoparticulate forms, but the relative contributions of these different forms to overall metal uptake rates under environmental conditions are not quantitatively defined. Here we investigated the linkage between the dissolution rates of copper(II) oxide (CuO) nanoparticles (NPs) and their bioavailability to Gulf killifish (Fundulus grandis) embryos, with the aim of quantitatively delineating the relative contributions of nanoparticulate and dissolved species for Cu uptake...
January 12, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28078576/feeding-problems-and-nutrient-intake-in-children-with-and-without-autism-a-comparative-study
#9
Prahbhjot Malhi, Lolam Venkatesh, Bhavneet Bharti, Pratibha Singhi
OBJECTIVE: To compare parent reported feeding difficulties and nutritional adequacy of children with Autism Spectrum Disorders (ASD) to an age and socio-economically matched group of typically developing children. METHODS: The scores on Children's Eating Behavior Inventory (CEBI), three-day food records, anthropometric measures and adequacy of micro- and macro- nutrients were compared for 63 children diagnosed with ASD and 50 typically developing children enrolled from the department of pediatrics of a tertiary care teaching hospital from North India...
January 12, 2017: Indian Journal of Pediatrics
https://www.readbyqxmd.com/read/28075138/control-of-chemo-regio-and-enantioselectivity-in-copper-hydride-reductions-of-morita-baylis-hillman-adducts
#10
Roscoe T H Linstadt, Carl A Peterson, Carina I Jette, Zarko V Boskovic, Bruce H Lipshutz
Nonracemically ligated copper hydride can be used to effect tandem SN2'/1,2-reductions of racemic Morita-Baylis-Hillman (MBH) acetates to access enantioenriched chiral allylic alcohols with defined olefin geometry. MBH esters, including those with β-substitution, can be transformed to stereodefined enoates by taking advantage of a bulky, oligomeric, in situ generated trialkoxysiloxane leaving group. Finally, an atypical conversion of easily arrived at MBH alcohol derivatives to nonracemic allylic alcohols is disclosed...
January 11, 2017: Organic Letters
https://www.readbyqxmd.com/read/28071764/aligned-copper-nanorod-arrays-for-highly-efficient-generation-of-intense-ultra-broadband-thz-pulses
#11
S Mondal, Q Wei, W J Ding, H A Hafez, M A Fareed, A Laramée, X Ropagnol, G Zhang, S Sun, Z M Sheng, J Zhang, T Ozaki
We demonstrate an intense broadband terahertz (THz) source based on the interaction of relativistic-intensity femtosecond lasers with aligned copper nanorod array targets. For copper nanorod targets with a length of 5 μm, a maximum 13.8 times enhancement in the THz pulse energy (in ≤20 THz spectral range) is measured as compared to that with a thick plane copper target under the same laser conditions. A further increase in the nanorod length leads to a decrease in the THz pulse energy at medium frequencies (≤20 THz) and increase of the electromagnetic pulse energy in the high-frequency range (from 20-200 THz)...
January 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28069487/stabilization-of-the-cyclodecadiene-derivative-isofuranodiene-by-silver-i-coordination-mechanistic-and-biological-aspects
#12
Filippo Maggi, Fabrizio Papa, Stefania Pucciarelli, Massimo Bramucci, Luana Quassinti, Luciano Barboni, Diego Dal Ben, Anna Teresa Ramadori, Claudia Graiff, Rossana Galassi
The industrial extraction and further applications of isofuranodiene are limited because at room temperature it spontaneously converts to curzerene, a structurally less active isomer. This work definitively identified the structure of isofuranodiene in the solid state, showing the two methyl groups in syn position. In addition, two bioactive metal cations, namely, silver(I) and copper(II) ions, were used in the attempt to obtain the chemical stability of isofuranodiene: in the case of silver(I), a labile adduct was formed, while in the case of copper(II), a more stable 1:1 adduct was achieved...
January 6, 2017: Fitoterapia
https://www.readbyqxmd.com/read/28067393/longitudinal-assessment-of-metal-concentrations-and-copper-isotope-ratios-in-the-g93a-sod1-mouse-model-of-amyotrophic-lateral-sclerosis
#13
T Gabriel Enge, Heath Ecroyd, Dianne F Jolley, Justin J Yerbury, Anthony Dosseto
Amyotrophic lateral sclerosis (ALS) is a motor neuron disease, which involves progressive motor neuron degeneration in the central nervous system (CNS). The G93A SOD1 mouse model simulates one of the most common causes of familial ALS through the overexpression of a mutated form of the human gene encoding copper/zinc superoxide dismutase (SOD1). Transition metals, particularly Cu and Zn, have been shown to behave abnormally in the disease context and have been hypothesized to contribute to and potentially trigger the disease...
January 9, 2017: Metallomics: Integrated Biometal Science
https://www.readbyqxmd.com/read/28067248/deformation-mechanisms-to-ameliorate-the-mechanical-properties-of-novel-trip-twip-co-cr-mo-cu-ultrafine-eutectic-alloys
#14
J T Kim, S H Hong, H J Park, Y S Kim, J Y Suh, J K Lee, J M Park, T Maity, J Eckert, K B Kim
In the present study, the microstructural evolution and the modulation of the mechanical properties have been investigated for a Co-Cr-Mo (CCM) ternary eutectic alloy by addition of a small amount of copper (0.5 and 1 at.%). The microstructural observations reveal a distinct dissimilarity in the eutectic structure such as a broken lamellar structure and a well-aligned lamellar structure and an increasing volume fraction of Co lamellae as increasing amount of copper addition. This microstructural evolution leads to improved plasticity from 1% to 10% without the typical tradeoff between the overall strength and compressive plasticity...
January 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28062094/synthesis-of-bioactive-and-fluorescent-pyridine-triazole-coumarin-peptidomimetics-through-sequential-click-multicomponent-reactions
#15
T V Soumya, C Muhammed Ajmal, D Bahulayan
An easy synthetic protocol for the peptide randomization of 3,5-dicyano pyridine derivatives by linking the pyridine core with a coumarin chromophore spaced by a linker triazole via copper (I) catalyzed [3+2] azide-alkyne cycloaddition (CuAAC) is described. The new peptidomimetics thus obtained are extended rule of 5 (eRo5) molecules suitable for the development of therapeutic agents for undruggable targets. The structural and photophysical properties of the molecules are also promising for the development of potential bio imaging agents based on these molecules...
December 18, 2016: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/28059181/simultaneous-two-wavelength-phase-unwrapping-using-an-external-module-for-multiplexing-off-axis-holography
#16
Nir A Turko, Natan T Shaked
We present a dual-wavelength external holographic microscopy module for quantitative phase imaging of 3D structures with extended thickness range. This is done by simultaneous acquisition of two off-axis interferograms, each at a different wavelength, and generation of a synthetic wavelength, which is larger than the sample optical thickness, allowing two-wavelength unwrapping. The simultaneous acquisition is carried out by using optical multiplexing of the two interferograms onto the camera, where each of them has orthogonal off-axis interference fringe direction in relation to the other one...
January 1, 2017: Optics Letters
https://www.readbyqxmd.com/read/28057574/a-proteomic-approach-to-identify-metalloproteins-and-metal-binding-proteins-in-liver-from-diabetic-rats
#17
Camila Pereira Braga, José Cavalcante Souza Vieira, Ryan A Grove, Cory H T Boone, Aline de Lima Leite, Marília Afonso Rabelo Buzalaf, Ana Angélica Henrique Fernandes, Jiri Adamec, Pedro de Magalhaes Padilha
Proteins play crucial roles in biological systems, thus studies comparing the protein pattern present in a healthy sample with an affected sample have been widely used for disease biomarker discovery. Although proteins containing metal ions constitute only a small proportion of the proteome, they are essential in a multitude of structural and functional processes. The correct association between metal ions and proteins is essential because this binding can significantly interfere with normal protein function...
January 3, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28054665/overproduction-of-superoxide-dismutase-and-catalase-confers-cassava-resistance-to-tetranychus-cinnabarinus
#18
Fuping Lu, Xiao Liang, Hui Lu, Qian Li, Qing Chen, Peng Zhang, Kaimian Li, Guanghua Liu, Wei Yan, Jiming Song, Chunfang Duan, Linhui Zhang
To explore the role of protective enzymes in cassava (Manihot esculenta Crantz) resistance to mites, transgenic cassava lines overproducing copper/zinc superoxide dismutase (MeCu/ZnSOD) and catalase (MeCAT1) were used to evaluate and molecularly confirm cassava resistance to Tetranychus cinnabarinus. Laboratory evaluation demonstrated that, compared with the control cultivar TMS60444 (wild type, WT), the survival, reproduction, development and activities of SOD and CAT in T. cinnabarinus feeding on transgenic cassava lines SC2, SC4, and SC11 significantly inhibited...
January 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28050710/the-copper-bis-thiosemicarbazone-complex-cu-ii-atsm-is-protective-against-cerebral-ischemia-through-modulation-of-the-inflammatory-milieu
#19
Mikko T Huuskonen, Qing-Zhang Tuo, Sanna Loppi, Hiramani Dhungana, Paula Korhonen, Lachlan E McInnes, Paul S Donnelly, Alexandra Grubman, Sara Wojciechowski, Katarina Lejavova, Yuriy Pomeshchik, Laura Periviita, Lotta Kosonen, Martina Giordano, Frederick R Walker, Rong Liu, Ashley I Bush, Jari Koistinaho, Tarja Malm, Anthony R White, Peng Lei, Katja M Kanninen
Developing new therapies for stroke is urgently needed, as this disease is the leading cause of death and disability worldwide, and the existing treatment is only available for a small subset of patients. The interruption of blood flow to the brain during ischemic stroke launches multiple immune responses, characterized by infiltration of peripheral immune cells, the activation of brain microglial cells, and the accumulation of immune mediators. Copper is an essential trace element that is required for many critical processes in the brain...
January 3, 2017: Neurotherapeutics: the Journal of the American Society for Experimental NeuroTherapeutics
https://www.readbyqxmd.com/read/28048037/su-f-t-127-charged-particle-transport-in-condensed-media
#20
M Dingfelder, R McLawhorn, E Maertz, J Shinpaugh
PURPOSE: Provide quality interaction cross sections for charged particle Monte Carlo (MC) track structure codes and evaluate low energy electron transport in condensed media. METHODS: MC methods and codes are often used to model or simulate charged particle radiation transport in matter. Detailed (or event-by-event) track structure simulations are of special interest for the modeling of the physical and chemical stages of radiation action with matter and the initial radiation damage to biological systems...
June 2016: Medical Physics
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