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https://www.readbyqxmd.com/read/28532091/design-and-fabrication-of-carbon-fibers-with-needle-like-nano-ha-coating-to-reinforce-granular-nano-ha-composites
#1
Xudong Wang, Xueni Zhao, Li Zhang, Wanying Wang, Jing Zhang, Fuzhen He, Jianjun Yang
Carbon fibers (CFs) with needle-like nano-hydroxyapatite (nHA) coating were first used as reinforcing materials named nHA-CFs to improve the mechanical properties of pure HA. A powder mixture containing nHA-CFs and granular nano-HA (gHA) was directly sintered by hot pressing at appropriate sintering pressure and temperature. A three-phase nHA-CFs/gHA composite was designed, fabricated, and used as an artificial bone. Results show that the bending strengths of the nHA-CFs/gHA composite are approximately 41.1% and 59...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28531999/zro2-toughened-al2o3-based-near-net-shaped-femoral-head-unique-fabrication-approach-3d-microstructure-burst-strength-and-muscle-cell-response
#2
Debasish Sarkar, Sourav Mandal, B S Reddy, Nitu Bhaskar, D C Sundaresh, Bikramjit Basu
The development of reliable biomedical devices demands the use of an integrated manufacturing protocol with comprehensive understanding of prototype characterization in terms of 3D microstructural analysis along with biocompatibility. While addressing these issues for ZrO2 (3mol% Y2O3 stabilized)-toughened Al2O3-based femoral head prototypes, the present work reports a unique fabrication protocol involving a sequence of uniaxial compaction followed by pre-sintering, machining, final sintering and polishing to ensure dimensional tolerance with respect to the design of patient-specific femoral head...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28531268/implementation-of-an-integrated-approach-to-the-national-hiv-aids-strategy-for-improving-human-immunodeficiency-virus-care-for-youths
#3
J Dennis Fortenberry, Linda J Koenig, Bill G Kapogiannis, Carrie L Jeffries, Jonathan M Ellen, Craig M Wilson
Importance: Youths aged 13 to 24 years old living with human immunodeficiency virus (HIV) are less likely than adults to receive the health and prevention benefits of HIV treatments, with only a small proportion having achieved sustained viral suppression. These age-related disparities in HIV continuum of care are owing in part to the unique developmental issues of adolescents and young adults as well as the complexity and fragmentation of HIV care and related services. This article summarizes a national, multiagency, and multilevel approach to HIV care for newly diagnosed youths designed to bridge some of these fragmentations by addressing National HIV/AIDS Strategy goals for people living with HIV...
May 22, 2017: JAMA Pediatrics
https://www.readbyqxmd.com/read/28531158/impact-analysis-of-flow-shaping-in-ethernet-avb-tsn-and-afdx-from-network-calculus-and-simulation-perspective
#4
Feng He, Lin Zhao, Ershuai Li
Ethernet-AVB/TSN (Audio Video Bridging/Time-Sensitive Networking) and AFDX (Avionics Full DupleX switched Ethernet) are switched Ethernet technologies, which are both candidates for real-time communication in the context of transportation systems. AFDX implements a fixed priority scheduling strategy with two priority levels. Ethernet-AVB/TSN supports a similar fixed priority scheduling with an additional Credit-Based Shaper (CBS) mechanism. Besides, TSN can support time-triggered scheduling strategy. One direct effect of CBS mechanism is to increase the delay of its flows while decreasing the delay of other priority ones...
May 22, 2017: Sensors
https://www.readbyqxmd.com/read/28531096/the-lys-asp-tyr-triad-within-the-mite-allergen-der-p-1-propeptide-is-a-critical-structural-element-for-the-ph-dependent-initiation-of-the-protease-maturation
#5
Andy Chevigné, Vincenzo Campizi, Martyna Szpakowska, David Bourry, Marie-Eve Dumez, José C Martins, André Matagne, Moreno Galleni, Alain Jacquet
The major house dust mite allergen, Der p 1, is a papain-like cysteine protease expressed as an inactive precursor, proDer p 1, carrying an N-terminal propeptide with a unique structure. The maturation of the zymogen into an enzymatically-active form of Der p 1 is a multistep autocatalytic process initiated under acidic conditions through conformational changes of the propeptide, leading to the loss of its inhibitory ability and its subsequent gradual cleavage. The aims of this study were to characterize the residues present in the Der p 1 propeptide involved in the initiation of the zymogen maturation process, but also to assess the impact of acidic pH on the propeptide structure, the activity of Der p 1 and the fate of the propeptide...
May 20, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28530865/integrated-call-system-bridges-gap-between-htm-and-it
#6
Gavin Stern
No abstract text is available yet for this article.
May 2017: Biomedical Instrumentation & Technology
https://www.readbyqxmd.com/read/28530817/inherently-chiral-upper-rim-bridged-calix-4-arenes-possessing-a-seven-membered-ring
#7
Martin Tlustý, Petr Slavík, Michal Kohout, Václav Eigner, Pavel Lhoták
The mercuration of calix[4]arene immobilized in the cone conformation allowed the introduction of an amino group at the meta position of the basic skeleton. Acylation and subsequent intramolecular Bischler-Napieralski-type cyclization led to a novel type of bridged calixarene containing a seven-membered ring. These compounds with an enlarged and rigidified cavity represent a unique and inherently chiral system that may potentially be applicable for the design of chiral receptors. The absolute configuration of one enantiomer, obtained by resolution of the racemate using chiral HPLC, was assigned by single-crystal structure determination...
May 22, 2017: Organic Letters
https://www.readbyqxmd.com/read/28530623/-laparoscopic-boari-flap-ureteral-reimplantation
#8
Ignacio Castilló-Vela, Gema Del Pozo Jiménez, Jorge Turo Antona, David Vázquez Alba, Javier Sáenz Medina, Joaquín Carballido Rodríguez
OBJECTIVES: To report our initial experience with laparoscopic Boari flap ureteral reimplantation and to review the main technical elements in ureteral reconstructive surgery. METHODS: In a 10-year period we performed 23 laparoscopic ureteral reimplantations. Three cases required a Boari flap. Two patients presented ureteral stenosis above the iliac vessels and the third one a urothelial tumor of the pelvic ureter. RESULTS: Two cases were completed laparoscopically; the third one was electively converted to open surgery to avoid prolonged OR time...
May 2017: Archivos Españoles de Urología
https://www.readbyqxmd.com/read/28530413/inverting-the-power-dynamic-the-process-of-first-sessions-of-psychotherapy-with-therapists-of-color-and-non-latino-white-patients
#9
Lia Okun, Doris F Chang, Gregory Kanhai, Jordan Dunn, Hailey Easley
The present study is the first to apply Trawalter, Richeson, and Shelton's (2009) stress and coping framework to qualitatively examine interracial interactions in initial sessions of psychotherapy. The sample included 22 dyads: 15 therapists of color administering various treatment modalities to 15 treatment-seeking non-Latino White (NLW) patients and a comparison group of 7 intraracial (NLW-NLW) dyads. In Phase 1, videorecordings of the first session of treatment were analyzed using inductive thematic analysis (TA) to describe patient and therapist behaviors...
May 22, 2017: Journal of Counseling Psychology
https://www.readbyqxmd.com/read/28529791/crystal-structure-of-1-4-8-11-tetra-azonia-cyclo-tetra-decane-bis-dichromate-monohydrate-from-synchrotron-data
#10
Dohyun Moon, Jong-Ha Choi
The asymmetric unit of the hydrated title salt, (C10H28N4)[Cr2O7]2·H2O [C10H28N4 = H4(cyclam) = 1,4,8,11-tetra-azonia-cyclo-tetra-deca-ne], contains two half-cations (both completed by crystallographic inversion symmetry), two dichromate anions and one water mol-ecule. The two [CrO7](2-) anions exhibit a nearly staggered conformation, with bridging angles of 133.37 (11) and 136.28 (12)°. The distortions of the dichromate anions are due to their participation in hydrogen-bonding inter-actions with the water mol-ecule and the cations...
May 1, 2017: Acta Crystallographica. Section E, Crystallographic Communications
https://www.readbyqxmd.com/read/28529784/%C3%AE-3-chlorido-%C3%AE-2-chlorido-%C3%AE-3-pyrrolidine-1-carbo-dithio-ato-%C3%AE%C2%BA-4-s-s-s-s-tris-tri-ethyl-phosphane-%C3%AE%C2%BAp-copper-i-crystal-structure-and-hirshfeld-surface-analysis
#11
Yi Jiun Tan, Chien Ing Yeo, Nathan R Halcovitch, Mukesh M Jotani, Edward R T Tiekink
The title trinuclear compound, [Cu3(C5H8NS2)Cl2(C6H15P)3], has the di-thio-carbamate ligand symmetrically chelating one Cu(I) atom and each of the S atoms bridging to another Cu(I) atom. Both chloride ligands are bridging, one being μ3- and the other μ2-bridging. Each Et3P ligand occupies a terminal position. Two of the Cu(I) atoms exist within Cl2PS donor sets and the third is based on a ClPS2 donor set, with each coordination geometry based on a distorted tetra-hedron. The constituents defining the core of the mol-ecule, i...
May 1, 2017: Acta Crystallographica. Section E, Crystallographic Communications
https://www.readbyqxmd.com/read/28529781/crystal-structure-of-catena-poly-di-aqua-bis-2-4-6-tri-methyl-benzoato-%C3%AE%C2%BAo-cobalt-ii-%C3%AE-aqua-%C3%AE%C2%BA-2-o-o-dihydrate
#12
Tuncer Hökelek, Nurcan Akduran, Safiye Özkaya, Hacali Necefoğlu
The asymmetric unit of the title one-dimensional polymeric compound, {[Co(C10H11O2)2(H2O)3]·2H2O} n , contains one Co(II) cation situated on a centre of inversion, one-half of a coordinating water mol-ecule, one 2,4,6-tri-methyl-benzoate (TMB) anion together with one coordinating and one non-coordinating water mol-ecule; the TMB anion acts as a monodentate ligand. In the anion, the carboxyl-ate group is twisted away from the attached benzene ring by 84.9 (2)°. The Co(II) atom is coordinated by two TMB anions and two water mol-ecules in the basal plane, while another water mol-ecule bridges the Co(II) atoms in the axial directions, forming polymeric chains running along [001]...
May 1, 2017: Acta Crystallographica. Section E, Crystallographic Communications
https://www.readbyqxmd.com/read/28529777/crystal-structures-of-titanium-aluminium-and-gallium-complexes-bearing-two-%C3%AE-2-ch3-units
#13
Tim Oswald, Mira Diekmann, Annika Frey, Marc Schmidtmann, Rüdiger Beckhaus
The isotypic crystal structures of two titanocene complexes containing an EMe3 unit (E = Al, Ga; Me = meth-yl) with two μ2-coordinating methyl groups, namely [μ-1(η(5))-(adamantan-1-yl-2κC(1))cycylo-penta-dien-yl]di-μ2-methyl-methyl-2κC-[1(η(5))-penta-methyl-cyclo-penta-dien-yl]aluminiumtitanium(III), [AlTi(CH3)3(C10H15)(C15H18)], and [μ-1(η(5))-(adamantan-1-yl-2κC(1))cycylo-penta-dien-yl]di-μ2-methyl-methyl-2κC-[1(η(5))-penta-methyl-cyclo-penta-dien-yl]galliumtitanium(III), [GaTi(CH3)3(C10H15)(C15H18)], are reported...
May 1, 2017: Acta Crystallographica. Section E, Crystallographic Communications
https://www.readbyqxmd.com/read/28529774/synthesis-and-crystallographic-characterization-of-a-mononuclear-cobalt-iii-complex-possessing-both-thiol-ate-and-thio-ether-donors-reactivity-of-an-thiol-ate-bridged-penta-nuclear-co2ag3-complex-with-iodo-methane
#14
Yosuke Fukuda, Nobuto Yoshinari, Takumi Konno
Treatment of an S-bridged penta-nuclear Ag(I)3Co(III)2 complex, [Ag3{Co(L)}2](3+) [L(3-) = N(CH2NHCH2CH2S(-))3], in which two tris-(thiol-ate)-type mononuclear Co(III) units ([Co(L)]) are bridged by three Ag(I) ions through S atoms, with iodo-methane (CH3I) gave a new Co(III) mononuclear complex, [Co(LMe2)](2+) [LMe2(-) = N(CH2NHCH2CH2S(-))(CH2NHCH2CH2SCH3)2], systematic name: {2-[(bis{[2-(methylsulfanyl)ethyl]aminomethyl}aminomethyl)amino]ethanethiolato}cobalt(III) bis(hexafluoridophosphate). This cationic complex was crystallized with PF6(-) anions to form the title compound, [Co(LMe2)](PF6)2...
May 1, 2017: Acta Crystallographica. Section E, Crystallographic Communications
https://www.readbyqxmd.com/read/28529736/use-of-dabigatran-vs-warfarin-with-low-molecular-weight-heparin-bridging-in-catheter-ablation-for-atrial-fibrillation-patients-with-a-low-chads2-score
#15
Li Hao, Bing Rong, Fei Xie, Ming-Jie Lin, Jing-Quan Zhong
The purpose of the present study was to compare the efficacy and safety of dabigatran and interrupted warfarin with low-molecular-weight heparin bridging in non-valvular atrial fibrillation (AF) catheter ablation. Previously, there has been concerns that bridging therapy increases bleeding events without the benefit of stroke prevention. It has been suggested that bridging therapy should be considered only for patients at high-risk of thrombosis. Nevertheless, bridging therapy in AF patients with a low CHADS2 score may be safe and effective...
May 2017: Biomedical Reports
https://www.readbyqxmd.com/read/28529100/transcriptional-and-post-transcriptional-gene-regulation-by-long-non-coding-rna
#16
REVIEW
Iain Dykes, Costanza Emanueli
Advances in genomics technology over recent years have led to the surprising discovery that the genome is far more pervasively transcribed than was previously appreciated. Much of the newly-discovered transcriptome appears to represent long non-coding RNA (lncRNA), a heterogeneous group of largely uncharacterised transcripts. Understanding the biological function of these molecules represents a major challenge and in this review we discuss some of the progress made to date. One major theme of lncRNA biology seems to be the existence of a network of interactions with microRNA (miRNA) pathways...
May 18, 2017: Genomics, Proteomics & Bioinformatics
https://www.readbyqxmd.com/read/28529053/unusual-intra-parenchymal-pontomedullary-epidermoid-cyst-in-a-2-year-old-case-report-and-literature-review
#17
Anan Shtaya, Bassam Dabbous, Evgenia Fanou, Leslie Bridges, Samantha Hettige
BACKGROUND: Intrinsic brainstem epidermoid cysts are rare, benign, slow growing lesions. Their eloquence preclude complete excision, however subtotal resection will often result in prolonged or sometimes permanent relief of presenting symptoms and signs. We describe an unusual case and review the literature of this pathology in the paediatric population. CASE DESCRIPTION: We report an intra-axial pontine epidermoid cyst in a 2-year-old girl who presented with developmental delay, multiple cranial nerve palsies and pneumonia...
May 18, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28528643/a-new-method-for-cryo-sectioning-cell-monolayers-using-a-correlative-workflow
#18
Androniki Kolovou, Martin Schorb, Abul Tarafder, Carsten Sachse, Yannick Schwab, Rachel Santarella-Mellwig
Cryo-electron microscopy (cryo-EM) techniques have made a huge advancement recently, providing close to atomic resolution of the structure of protein complexes. Interestingly, this imaging technique can be performed in cells, giving access to the molecular machines in their natural context, therefore bridging structural and cell biology. However, in situ structural electron microscopy faces one major challenge, which is the ability to focus on specific subcellular regions to capture the objects of interest...
2017: Methods in Cell Biology
https://www.readbyqxmd.com/read/28528282/management-options-in-the-treatment-of-femoral-pseudoaneurysms-secondary-to-intravenous-drug-abuse-a-case-series
#19
James Rammell, Nisheeth Kansal, Vish Bhattacharya
INTRODUCTION: Infected femoral pseudoaneurysms are a common presentation in intravenous drug users with little consensus as to the optimum management of these patients. Whilst emergency revascularisation options are available, excision and ligation of the femoral artery remains the most common operative intervention but risks leaving the patient with critical ischaemia or intermittent claudication. This case series reviewed the outcomes of 4 patients who underwent excision-ligation without revascularisation of an infected femoral pseudoaneurysm at a district general hospital...
May 5, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28528213/optimal-electrostatic-interactions-between-substrate-and-protein-are-essential-for-radical-chemistry-in-ornithine-4-5-aminomutase
#20
Caitlyn Makins, Douglas A Whitelaw, Michael McGregor, Alix Petit, Robert G Mothersole, Kathleen E Prosser, Kirsten R Wolthers
Ornithine 4,5-aminomutase (OAM) from Clostridium sticklandii is an adenosylcobalamin (AdoCbl) and pyridoxal 5'-phosphate (PLP)-dependent enzyme that catalyzes a 1,2-amino shift, interconverting D-ornithine and 2S, 4R-diaminopentanoate. The reaction occurs via a radical-based mechanism whereby a PLP-bound substrate radical undergoes intramolecular isomerization via an azacyclopropylcarbinyl radical intermediate. Herein, we investigated the catalytic role of active site residues that form non-covalent interactions with PLP and/or substrate, D-ornithine...
May 17, 2017: Biochimica et Biophysica Acta
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