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https://www.readbyqxmd.com/read/28534391/understanding-electron-transport-in-disk-shaped-triphenylene-tris-naphthaleneimidazole-s-through-structural-modification-and-theoretical-investigation
#1
Yue Zhang, David A Hanifi, M Paz Fernandez-Liencres, Liana M Klivansky, Biwu Ma, Amparo Navarro, Yi Liu
Disk-shaped molecules with large aromatic π-surface are a class of organic semiconductors of which the charge carrier transport properties could be greatly facilitated by preferred intermolecular stacking of the π-surfaces. The optical and electronic properties are not only determined by the core aromatic structure of these disk-shaped molecules, but also strongly dependent on the sidechains, which directly impact the molecular self-assembly behavior in condensed phases. Triphenylene-tris(naphthaleneimidazole) (TP-TNI) is a recently reported n-type semiconductor featuring a large π-core and branched sidechains with an electron transporting mobility reaching 10-4 cm2V-1s-1...
May 23, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28533378/pyrite-sulfur-isotopes-reveal-glacial-interglacial-environmental-changes
#2
Virgil Pasquier, Pierre Sansjofre, Marina Rabineau, Sidonie Revillon, Jennifer Houghton, David A Fike
The sulfur biogeochemical cycle plays a key role in regulating Earth's surface redox through diverse abiotic and biological reactions that have distinctive stable isotopic fractionations. As such, variations in the sulfur isotopic composition (δ(34)S) of sedimentary sulfate and sulfide phases over Earth history can be used to infer substantive changes to the Earth's surface environment, including the rise of atmospheric oxygen. Such inferences assume that individual δ(34)S records reflect temporal changes in the global sulfur cycle; this assumption may be well grounded for sulfate-bearing minerals but is less well established for pyrite-based records...
May 22, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28531984/bioactive-materials-driven-primary-stability-on-titanium-biocomposites
#3
T A Dantas, C S Abreu, M M Costa, G Miranda, F S Silva, N Dourado, J R Gomes
The Ti6Al4V alloy constitutes an alternative choice to the most common metal-polymer solutions for total hip arthroplasty (THA) due to good biocompatibility, optimal mechanical properties and high load bearing capacity. However, as Ti6Al4V is not bioactive in its conventional form, hydroxyapatite (HAp) and tricalcium phosphate (TCP) have been widely used as coatings of metal prostheses due to their osteogenic properties and ability to form strong bonds with bone tissue. A promising approach consists in creating a bioactive surface metal matrix composite Ti6Al4V+β-TCP or Ti6Al4V+HAp, obtained by hot pressing (HP) of powders...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28530799/bioinspired-interface-engineering-for-moisture-resistance-in-nacre-mimetic-cellulose-nanofibrils-clay-nanocomposites
#4
Kun Yao, Shu Huang, Hu Tang, Yeping Xu, Gerd Buntkowsky, Lars A Berglund, Qi Zhou
The interfacial adhesion design between "mortar" and "bricks" is essential for mechanical and barrier performance of nanocellulose-based nacre-mimetic nanocomposites, especially at high moisture conditions. To address this fundamental challenge, dopamine (DA) has been conjugated to cellulose nanofibrils (CNFs) and subsequently assembled with montmorillonite (MTM) to generate layered nanocomposite films inspired by the strong adhesion of mussel adhesive proteins to inorganic surfaces under water. The selective formation of catechol/metal ion chelation and hydrogen bonding at the interface between MTM platelets and CNFs bearing DA renders transparent films with strong mechanical properties, particularly at high humidity and in wet state...
May 22, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28530795/modelling-living-cells-response-to-surface-tension-and-chemical-patterns
#5
Marco Macis, Francesca Lugli, Francesco Zerbetto
Mechanobiology is an important epigenetic factor. It influences cell functioning and bears on gene induction, protein synthesis, cell growth and differentiation. In the presence of patterned chemical cues, living cells can take shapes that are far from that of a drop of fluid. These shapes are characterized by inward curvatures that are pinned at the points of location of the cues. The mechano-chemical interactions that orchestrate cell behavior is simulated and controlled by modeling the cells as made by parcels of fluid...
May 22, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28530247/long-range-ferrimagnetic-order-in-a-two-dimensional-supramolecular-kondo-lattice
#6
Jan Girovsky, Jan Nowakowski, Md Ehesan Ali, Milos Baljozovic, Harald R Rossmann, Thomas Nijs, Elise A Aeby, Sylwia Nowakowska, Dorota Siewert, Gitika Srivastava, Christian Wäckerlin, Jan Dreiser, Silvio Decurtins, Shi-Xia Liu, Peter M Oppeneer, Thomas A Jung, Nirmalya Ballav
Realization of long-range magnetic order in surface-supported two-dimensional systems has been challenging, mainly due to the competition between fundamental magnetic interactions as the short-range Kondo effect and spin-stabilizing magnetic exchange interactions. Spin-bearing molecules on conducting substrates represent a rich platform to investigate the interplay of these fundamental magnetic interactions. Here we demonstrate the direct observation of long-range ferrimagnetic order emerging in a two-dimensional supramolecular Kondo lattice...
May 22, 2017: Nature Communications
https://www.readbyqxmd.com/read/28529109/late-dislocations-after-total-hip-arthroplasty-is-the-bearing-a-factor
#7
Siddharth M Shah, William L Walter, Stephen M Tai, Michelle F Lorimer, Richard N de Steiger
BACKGROUND: Dislocation is a leading cause of revision after primary total hip arthroplasty (THA). Although more common in the first few years after the procedure, dislocation can occur at any time. This study investigated the difference in late dislocation in ceramic-on-ceramic (CoC) bearings compared with metal-on-polyethylene and ceramic-on-polyethylene bearings in THA. METHODS: Data were used from the Australian Orthopaedic Association National Joint Replacement Registry, and the cumulative percent revision for dislocation was estimated using the Kaplan-Meier method for the different bearing surfaces...
April 27, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28527917/spatial-distribution-of-vanadium-and-microbial-community-responses-in-surface-soil-of-panzhihua-mining-and-smelting-area-china
#8
Xuelong Cao, Muhe Diao, Baogang Zhang, Hui Liu, Song Wang, Meng Yang
Spatial distribution of vanadium in surface soils from different processing stages of vanadium-bearing titanomagnetite in Panzhihua mining and smelting area (China) as well as responses of microbial communities including bacteria and fungi to vanadium were investigated by fieldwork and laboratory incubation experiment. The vanadium contents in this region ranged from 149.3 to 4793.6 mg kg(-1), exceeding the soil background value of vanadium in China (82 mg kg(-1)) largely. High-throughput DNA sequencing results showed bacterial communities from different manufacturing locations were quite diverse, but Bacteroidetes and Proteobacteria were abundant in all samples...
May 17, 2017: Chemosphere
https://www.readbyqxmd.com/read/28527835/biomechanical-study-on-surgical-fixation-methods-for-minimally-invasive-treatment-of-hallux-valgus
#9
Rui Mao, Junchao Guo, Chenyu Luo, Yubo Fan, Jianmin Wen, Lizhen Wang
Hallux valgus (HV) was one of the most frequent female foot deformities. The aim of this study was to evaluate mechanical responses and stabilities of the Kirschner, bandage and fiberglass fixations after the distal metatarsal osteotomy in HV treatment. Surface traction of different forefoot regions in bandage fixation and the biomechanical behavior of fiberglass bandage material were measured by a pressure sensor device and a mechanical testing, respectively. A three-dimensional foot finite element (FE) model was developed to simulate the three fixation methods (Kirschner, bandage and fiberglass fixations) in weight bearing...
May 17, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28526475/identification-and-preliminary-structure-activity-relationships-of-1-indanone-derivatives-as-novel-indoleamine-2-3-dioxygenase-1-ido1-inhibitors
#10
Dingding Gao, Yingxia Li
Indoleamine 2,3-dioxygenase 1 (IDO1) plays a vital role in the catabolism of tryptophan along with the kynurenine pathway which is involved in many human diseases including cancer, Alzheimer's disease, etc. In this study, compound 1 bearing a 1-Indanone scaffold was identified as a novel IDO1 inhibitor by structure-based virtual screening, with moderate to good enzymatic and cellular inhibitory activities. Also, surface plasmon resonance analysis validated the direct interaction between compound 1 and IDO1 protein...
May 10, 2017: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/28523427/-total-ankle-arthroplasty-with-simultaneous-subtalar-fusion
#11
J Mainzer, P Rippstein
OBJECTIVE: Pain free weight bearing ability with orthograde hindfoot position and preserved tibiotalar motion. INDICATIONS: Symptomatic arthritis of the ankle and subtalar joint, additional subtalar hindfoot malalignment. CONTRAINDICATIONS: Absolute: acute infection, noncorrectable ligamentous instability or bony defects, restricted perfusion, diabetic foot syndrome. Relative: inability to comply with postoperative partial weight bearing, only moderate symptoms of subtalar arthritis, smoking, intricate soft tissue situation...
May 18, 2017: Operative Orthopädie und Traumatologie
https://www.readbyqxmd.com/read/28516279/a-new-carbon-based-magnetic-material-for-the-dispersive-solid-phase-extraction-of-uv-filters-from-water-samples-before-liquid-chromatography-tandem-mass-spectrometry-analysis
#12
Susy Piovesana, Anna Laura Capriotti, Chiara Cavaliere, Giorgia La Barbera, Roberto Samperi, Riccardo Zenezini Chiozzi, Aldo Laganà
Magnetic solid-phase extraction is one of the most promising new extraction methods for liquid samples before ultra-high-performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS) analysis. Several types of materials, including carbonaceous ones, have been prepared for this purpose. In this paper, for the first time, the preparation, characterization, and sorption capability of Fe3O4-graphitized carbon black (mGCB) composite toward some compounds of environmental interest were investigated. The synthesized mGCB consisted of micrometric GCB particles with 55 m(2) g(-1) surface area bearing some carbonyl and hydroxyl functionalities and the surface partially decorated by Fe3O4 microparticles...
May 18, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28515980/investigating-the-effectiveness-of-kinesio%C3%A2-taping-space-correction-method-in-healthy-adults-on-patellofemoral-joint-and-subcutaneous-space
#13
Katie J Lyman, Kassiann Keister, Kara Gange, Christopher D Mellinger, Thomas A Hanson
BACKGROUND: Limited quantitative, physiological evidence exists regarding the effectiveness of Kinesio® Taping methods, particularly with respect to the potential ability to impact underlying physiological joint space and structures. To better understand the impact of these techniques, the underlying physiological processes must be investigated in addition to the examination of more subjective measures related to pain in unhealthy tissues. HYPOTHESIS/PURPOSE: The purpose of this study was to determine whether the Kinesio® Taping Space Correction Method created a significant difference in patellofemoral joint space, as quantified by diagnostic ultrasound...
April 2017: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/28515978/variation-in-medial-and-lateral-gastrocnemius-muscle-activity-with-foot-position
#14
Michael Cibulka, April Wenthe, Zach Boyle, Dylan Callier, Adam Schwerdt, Deidra Jarman, Michael J Strube
BACKGROUND: The gastrocnemius has two heads, medial gastrocnemius (MG) and lateral gastrocnemius (LG); little is known how they contract with different foot positions. The MG is more frequently strained than the LG; and gastrocnemius activation pattern altered by foot position may play a role in injury. Leg exercises often use a toe-in versus toe-out foot position to isolate one gastrocnemius head over another. PURPOSE: The purpose of this study was to determine the electromyographic gastrocnemius muscle activity in the toe-out and toe-in foot positions during weight bearing and non-weight bearing activities...
April 2017: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/28515942/a-tandem-cd19-cd20-car-lentiviral-vector-drives-on-target-and-off-target-antigen-modulation-in-leukemia-cell-lines
#15
Dina Schneider, Ying Xiong, Darong Wu, Volker Nӧlle, Sarah Schmitz, Waleed Haso, Andrew Kaiser, Boro Dropulic, Rimas J Orentas
BACKGROUND: Clinical success with chimeric antigen receptor (CAR)- based immunotherapy for leukemia has been accompanied by the associated finding that antigen-escape variants of the disease are responsible for relapse. To target hematologic malignancies with a chimeric antigen receptor (CAR) that targets two antigens with a single vector, and thus potentially lessen the chance of leukemic escape mutations, a tandem-CAR approach was investigated. METHODS: Antigen binding domains from the FMC63 (anti-CD19) and Leu16 (anti-CD20) antibodies were linked in differing configurations to transmembrane and T cell signaling domains to create tandem-CARs...
2017: Journal for Immunotherapy of Cancer
https://www.readbyqxmd.com/read/28515662/tempo-functionalized-c60-fullerene-deposited-on-gold-surface-for-catalytic-oxidation-of-selected-alcohols
#16
Piotr Piotrowski, Joanna Pawłowska, Jarosław Grzegorz Sadło, Renata Bilewicz, Andrzej Kaim
C60TEMPO10 catalytic system linked to a microspherical gold support through a covalent S-Au bond was developed. The C60TEMPO10@Au composite catalyst had a particle size of 0.5-0.8 μm and was covered with the fullerenes derivative of 2.3 nm diameter bearing ten nitroxyl groups; the organic film showed up to 50 nm thickness. The catalytic composite allowed for the oxidation under mild conditions of various primary and secondary alcohols to the corresponding aldehyde and ketone analogues with efficiencies as high as 79-98%, thus giving values typical for homogeneous catalysis, while retaining at the same time all the advantages of heterogeneous catalysis, e...
2017: Journal of Nanoparticle Research: An Interdisciplinary Forum for Nanoscale Science and Technology
https://www.readbyqxmd.com/read/28513982/plasmon-enhanced-fluorescence-based-on-porphyrin-peptoid-hybridized-gold-nanoparticle-platform
#17
Younghye Kim, Boyeong Kang, Hyo-Yong Ahn, Jiwon Seo, Ki Tae Nam
A porphyrin-peptoid-hybridized silica-coated gold nanoparticle is developed, which is inspired by the protein-chlorophyll ensemble found in photosynthetic antenna. In the natural antenna, chlorophylls are integrated into dense assemblies that are supported by frameworks of proteins, which ensure optimal pigment arrangement for effective light harvesting. In the subject platform, porphyrins are conjugated to the peptoid helix scaffold in a structurally well-defined alignments and subsequently immobilized on the surface of nanoparticles...
May 17, 2017: Small
https://www.readbyqxmd.com/read/28513653/3d-and-2d-supramolecular-assemblies-and-thermotropic-behaviour-of-a-carbo-benzenic-mesogen
#18
Chongwei Zhu, Tsai-Hui Wang, Chien-Jhang Su, Shern-Long Lee, Arnaud Rives, Carine Duhayon, Brice Kauffmann, Valérie Maraval, Chun-Hsien Chen, Hsiu-Fu Hsu, Remi Chauvin
Hexaalkoxy-di(phenylethynyl)-tetraphenyl-carbo-benzenes bearing six CnH2n+1 aliphatic chains (n = 12, 18) have been synthesized and characterized, including by single crystal XRD analysis. For n = 12, a liquid crystal behaviour was observed in the range of 109-130 °C. DSC, POM and PXRD analyses evidenced a rectangular columnar mesophase at 115 °C. The determined 3D lattice constants are consistent with 2D STM images of the so-called "carbo-mesogen" deposited on an HOPG surface.
May 17, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28513415/the-fungal-cell-wall-structure-biosynthesis-and-function
#19
Neil A R Gow, Jean-Paul Latge, Carol A Munro
The molecular composition of the cell wall is critical for the biology and ecology of each fungal species. Fungal walls are composed of matrix components that are embedded and linked to scaffolds of fibrous load-bearing polysaccharides. Most of the major cell wall components of fungal pathogens are not represented in humans, other mammals, or plants, and therefore the immune systems of animals and plants have evolved to recognize many of the conserved elements of fungal walls. For similar reasons the enzymes that assemble fungal cell wall components are excellent targets for antifungal chemotherapies and fungicides...
May 2017: Microbiology Spectrum
https://www.readbyqxmd.com/read/28512850/in-situ-handheld-3d-bioprinting-for-cartilage-regeneration
#20
Claudia Di Bella, Serena Duchi, Cathal D O'Connell, Romane Blanchard, Cheryl Augustine, Zhilian Yue, Fletcher Thompson, Christopher Richards, Stephen Beirne, Carmine Onofrillo, Sebastien H Bauquier, Stewart D Ryan, Peter Pivonka, Gordon G Wallace, Peter F Choong
Articular cartilage injuries experienced at an early age can lead to the development of osteoarthritis later in life. In situ 3D printing is an exciting and innovative bio-fabrication technology that enables the surgeon to deliver tissue- engineering techniques at the time and location of need. We have created a hand- held 3D printing device (Biopen) that allows the simultaneous co-axial extrusion of bioscaffold and cultured cells directly into the cartilage defect in vivo in a single session surgery. This pilot study assesses the ability of the Biopen to repair a full thickness chondral defect and the early outcomes in cartilage regeneration, and compares these results to other treatments in a large animal model...
May 17, 2017: Journal of Tissue Engineering and Regenerative Medicine
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