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https://www.readbyqxmd.com/read/28445071/polymorphic-assembly-from-beveled-gold-triangular-nanoprisms
#1
Juyeong Kim, Xiaohui Song, Fei Ji, Binbin Luo, Nicole F Ice, Qipeng Liu, Qiao Zhang, Qian Chen
The shape anisotropy of nanoparticle building blocks is of critical importance in determining their packing symmetry and assembly directionality. While there has been extensive research on the effect of their overall geometric shapes, the importance of nanometer morphology details is not well-recognized or understood. Here we draw on shape-anisotropic gold triangular nanoprism building blocks synthesized based on a method we recently developed; besides the "large-scale" triangular prism shape (79.8 nm in side length and 22...
April 26, 2017: Nano Letters
https://www.readbyqxmd.com/read/28435556/anterior-knee-pain-after-tibial-intra-medullary-nailing-is-it-predictable
#2
P C Soraganvi, B S Anand-Kumar, R Rajagopalakrishnan, B A Praveen-Kumar
Introduction: Intramedullary nailing has been used frequently for the treatment of tibial diaphyseal fractures. Chronic anterior knee pain has been considered the most frequent post-operative complication of this technique. We investigated the relationship between anterior knee pain and position of nail tip in proximal tibia. Methods: 103 patients were selected among patients who underwent interlocking nailing in our institution. Patients with other factors that might cause anterior knee pain were excluded...
July 2016: Malaysian Orthopaedic Journal
https://www.readbyqxmd.com/read/28434944/dose-dependent-t-cell-dynamics-and-cytokine-cascade-following-rvsv-zebov-immunization
#3
Christine Dahlke, Rahel Kasonta, Sebastian Lunemann, Verena Krähling, Madeleine E Zinser, Nadine Biedenkopf, Sarah K Fehling, My L Ly, Anne Rechtien, Hans C Stubbe, Flaminia Olearo, Saskia Borregaard, Alen Jambrecina, Felix Stahl, Thomas Strecker, Markus Eickmann, Marc Lütgehetmann, Michael Spohn, Stefan Schmiedel, Ansgar W Lohse, Stephan Becker, Marylyn M Addo
BACKGROUND: The recent West African Ebola epidemic led to accelerated efforts to test Ebola vaccine candidates. As part of the World Health Organisation-led VSV Ebola Consortium (VEBCON), we performed a phase I clinical trial investigating rVSV-ZEBOV (a recombinant vesicular stomatitis virus-vectored Ebola vaccine), which has recently demonstrated protection from Ebola virus disease (EVD) in phase III clinical trials and is currently in advanced stages of licensing. So far, correlates of immune protection are incompletely understood and the role of cell-mediated immune responses has not been comprehensively investigated to date...
April 5, 2017: EBioMedicine
https://www.readbyqxmd.com/read/28433153/polyethylenimine-kappa-carrageenan-micro-arc-oxidation-coating-for-passivation-of-magnesium-alloy
#4
A Golshirazi, M Kharaziha, M A Golozar
The aim of this study was to combine micro-arc oxidation (MAO) and self-assembly technique to improve corrosion resistivity of AZ91 alloy. While a silicate-fluoride electrolyte was adopted for MAO treatment, polyethylenimine (PEI)/kappa carrageenan (KC) self-assembly coating was applied as the second coating layer. Resulted demonstrated the formation of forsterite-fluoride containing MAO coating on AZ91 alloy depending on the voltage and time of anodizing process. Addition of the second PEI/KC coating layer on MAO treated sample effectively enhanced the adhesive strength of MAO coated sample due to filling the pores with polymers and increase in the mechanical interlocking of coating to the substrate...
July 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28432806/rapid-acceptance-testing-of-modern-linac-using-on-board-mv-and-kv-imaging-systems
#5
Sridhar Yaddanapudi, Bin Cai, Taylor Harry, Steven Dolly, Baozhou Sun, Hua Li, Keith Stinson, Camille Noel, Lakshmi Santanam, Todd Pawlicki, Sasa Mutic, S Murty Goddu
PURPOSE: The purpose of this study was to develop a novel process for using on-board MV and kV Electronic Portal Imaging Devices (EPIDs) to perform linac acceptance testing (AT) for two reasons: 1) to standardize the assessment of new equipment performance, and 2) to reduce the time to clinical use while reducing physicist workload. METHODS AND MATERIALS: In this study, Varian TrueBeam linacs equipped with amorphous silicon based EPID (aS1000) were used. The conventional set of AT tests and tolerances were used as a baseline guide...
April 22, 2017: Medical Physics
https://www.readbyqxmd.com/read/28411649/nanoarmoring-of-enzymes-by-interlocking-in-cellulose-fibers-with-poly-acrylic-acid
#6
Caterina M Riccardi, Rajeswari M Kasi, Challa V Kumar
A simple method for interlocking glucose oxidase (GOx) and horseradish peroxidase (HRP) in cellulose fibers using poly(acrylic acid) (PAA) as an armor around the enzyme, without any need for activation of the cellulose support, is reported here. The resulting enzyme paper is an inexpensive, stable, simple, wearable, and washable biosensor. PAA functions as a multifunctional tether to interlock the enzyme molecules around the paper fibers so that the enzymes are protected against thermal/chemical denaturation and not released from the paper when washed with a detergent...
2017: Methods in Enzymology
https://www.readbyqxmd.com/read/28409334/investigation-of-x-ray-focal-spot-alignment-using-a-jig-of-novel-design
#7
Lockie Yuen, Cameron McLucas
The X-ray focal spot and the centre of the flattening filter should be placed as close as possible to the central axis (CAX) on a linear accelerator (linac) to produce a radially symmetric beam. The aim of this study is to devise a method to easily optimise the focal spot position of Varian linac photon beams generated with a flattening filter. A simple and robust jig was designed and built to be inserted into the largest electron applicator. Accessory and jaw position interlocks were overridden to enable photon beam operation...
April 13, 2017: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/28399048/pediatric-femoral-shaft-fractures-a-multicenter-review-of-the-aaos-clinical-practice-guidelines-before-and-after-2009
#8
John D Roaten, Derek M Kelly, Joseph L Yellin, John M Flynn, Micaela Cyr, Sumeet Garg, Alexander Broom, Lindsay M Andras, Jeffrey R Sawyer
BACKGROUND: To determine if the AAOS clinical practice guidelines (CPG) for the treatment of pediatric femoral shaft fractures (2009) changed treatment, we analyzed pediatric femoral shaft fractures at 4 high-volume, geographically separated, level-1 pediatric trauma centers over a 10-year period (2004 to 2013). METHODS: Consecutive series of pediatric femoral shaft fractures (ages, birth to 18 y) treated at the 4 centers were reviewed. Treatment methods were analyzed by age and treatment method for each center and in aggregate...
April 10, 2017: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/28383172/effect-of-alumina-particle-size-on-the-bond-strength-between-autopolymerized-acrylic-resin-and-commercially-pure-titanium
#9
Sara A Alfadda
PURPOSE: To address the following null hypothesis: when the Rocatec bonding system is used, the various sizes of aluminum oxide particles used to roughen the surface area of the commercially pure (CP) titanium prior to bonding to autopolymerized resin have no effect on the average shear bond strength. MATERIALS AND METHODS: One hundred specimens were randomly allocated to five equally sized groups: Ti-no air abrasion (group A), Ti-air-abraded with 50 μm (group B), Ti-110 μm (group C), Ti-250 μm (group D), and Co-Cr-50 μm (group E) grain-size aluminum oxide...
April 6, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/28381671/slide-ring-materials-using-cyclodextrin
#10
REVIEW
Kohzo Ito
We have recently synthesized slide-ring materials using cyclodextrin by cross-linking polyrotaxanes, a typical supramolecule. The slide-ring materials have polymer chains with bulky end groups topologically interlocked by figure-of-eight shaped junctions. This indicates that the cross-links can pass through the polymer chains similar to pulleys to relax the tension of the backbone polymer chains. The slide-ring materials also differ from conventional polymers in that the entropy of rings affects the elasticity...
2017: Chemical & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/28369838/sustaining-corporate-class-consciousness-across-the-new-liquid-managerial-elite-in-britain
#11
Aeron Davis
This article asks: how is class consciousness and cohesiveness amongst the UK business elite maintained in the twenty-first century? Elite studies traditionally sought to account for the construction and circulation of dominant ideology through exclusive education systems, institutional board interlocks and club memberships. The problem is that business elite membership of all these institutions has been steady declining in recent decades. Contemporary corporate elites now appear more mobile and fragmented in an age of globalization...
April 1, 2017: British Journal of Sociology
https://www.readbyqxmd.com/read/28363681/a-network-model-of-the-emotional-brain
#12
REVIEW
Luiz Pessoa
Emotion is often understood in terms of a circumscribed set of cortical and subcortical brain regions. I propose, instead, that emotion should be understood in terms of large-scale network interactions spanning the entire neuroaxis. I describe multiple anatomical and functional principles of brain organization that lead to the concept of 'functionally integrated systems', cortical-subcortical systems that anchor the organization of emotion in the brain. The proposal is illustrated by describing the cortex-amygdala integrated system and how it intersects with systems involving the ventral striatum/accumbens, septum, hippocampus, hypothalamus, and brainstem...
March 28, 2017: Trends in Cognitive Sciences
https://www.readbyqxmd.com/read/28363415/graphitic-carbon-nitride-nanofibers-in-seaweed-like-architecture-for-gas-chromatographic-separations
#13
Yunzhong Zheng, Qing Han, Meiling Qi, Liangti Qu
Seaweed-like graphitic carbon nitride (g-C3N4) has a unique porous architecture composed of interlocking g-C3N4 nanofibers (NF-C3N4) with much higher surface area than bulk g-C3N4 and shows good potential in separation science. This work investigated the separation performance of NF-C3N4 as stationary phase for capillary gas chromatographic (GC) separations. The NF-C3N4 column exhibits weak polarity and high column efficiency of 4728 plates/m for n-dodecane. Importantly, it displays good separation performance for a wide range of analytes and shows different retention behaviors from the bulk g-C3N4 column and commercial HP-5MS column with 5% phenylpolysiloxane...
March 23, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28358137/identification-and-evolution-of-a-plant-cell-wall-specific-glycoprotein-glycosyl-transferase-exad
#14
Svenning Rune Møller, Xueying Yi, Silvia Melina Velásquez, Sascha Gille, Pernille Louise Munke Hansen, Christian P Poulsen, Carl Erik Olsen, Martin Rejzek, Harriet Parsons, Yang Zhang, Hans H Wandall, Henrik Clausen, Robert A Field, Markus Pauly, Jose M Estevez, Jesper Harholt, Peter Ulvskov, Bent Larsen Petersen
Extensins are plant cell wall glycoproteins that act as scaffolds for the deposition of the main wall carbohydrate polymers, which are interlocked into the supramolecular wall structure through intra- and inter-molecular iso-di-tyrosine crosslinks within the extensin backbone. In the conserved canonical extensin repeat, Ser-Hyp4, serine and the consecutive C4-hydroxyprolines (Hyps) are substituted with an α-galactose and 1-5 β- or α-linked arabinofuranoses (Arafs), respectively. These modifications are required for correct extended structure and function of the extensin network...
March 30, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28357422/interlocked-benzenes-in-triangular-%C3%AF-architectures-anchoring-groups-dictate-ion-binding-and-transmission
#15
S Chandra Shekar, Sanjay Kumar Meena, R S Swathi
Macrocyclic compounds like crown ethers, calixarenes, etc. are well explored in the literature as receptors for alkali metal ions. In most of these studies, the size of the macrocyclic cavity has evolved as the prominent determining criterion for the selective binding of various ions. However, approaches to systematically tailor the ion transport properties via the interplay of topological as well as electronic properties of the hosts are rarely addressed. Herein, we investigate the performance of [2.2.2]PCPs ([2...
April 19, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28345764/the-tarsal-metatarsal-complex-of-caviomorph-rodents-anatomy-and-functional-adaptive-analysis
#16
Adriana M Candela, Nahuel A Muñoz, César M García-Esponda
Caviomorph rodents represent a major adaptive radiation of Neotropical mammals. They occupy a variety of ecological niches, which is also reflected in their wide array of locomotor behaviors. It is expected that this radiation would be mirrored by an equivalent disparity of tarsal-metatarsal morphology. Here, the tarsal-metatarsal complex of Erethizontidae, Cuniculidae, Dasyproctidae, Caviidae, Chinchillidae, Octodontidae, Ctenomyidae, and Echimyidae was examined, in order to evaluate its anatomical variation and functional-adaptive relevance in relation to locomotor behaviors...
March 27, 2017: Journal of Morphology
https://www.readbyqxmd.com/read/28344052/keeping-fat-on-time-circadian-control-of-adipose-tissue
#17
REVIEW
Stine Ninel Hansen, Julia Peics, Zachary Gerhart-Hines
Circadian clocks harmonize processes ranging from intracellular biochemistry to whole-body physiology in accordance with the Earth's 24h rotation. These intrinsic oscillators are based on an interlocked transcriptional-translational feedback loop comprised from a set of core clock factors. In addition to maintaining rhythmicity in nearly every cell of the body, these clock factors also mediate tissue specific metabolic functions. In this review, we will explore how the molecular clock shapes the unique features of different adipose depots...
March 23, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/28344013/a-self-adherent-bullet-shaped-microneedle-patch-for-controlled-transdermal-delivery-of-insulin
#18
Keum-Yong Seong, Min-Soo Seo, Dae Yeon Hwang, Eoin D O'Cearbhaill, Seamus Sreenan, Jeffrey M Karp, Seung Yun Yang
Proteins are important biologic therapeutics used for the treatment of various diseases. However, owing to low bioavailability and poor skin permeability, transdermal delivery of protein therapeutics poses a significant challenge. Here, we present a new approach for transdermal protein delivery using bullet-shaped double-layered microneedle (MN) arrays with water-swellable tips. This design enabled the MNs to mechanically interlock with soft tissues by selective distal swelling after skin insertion. Additionally, prolonged release of loaded proteins by passive diffusion through the swollen tips was obtained...
March 23, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28338143/mastering-the-non-equilibrium-assembly-and-operation-of-molecular-machines
#19
Cristian Pezzato, Chuyang Cheng, J Fraser Stoddart, R Dean Astumian
In mechanically interlocked compounds, such as rotaxanes and catenanes, the molecules are held together by mechanical rather than chemical bonds. These compounds can be engineered to have several well-defined mechanical states by incorporating recognition sites between the different components. The rates of the transitions between the recognition sites can be controlled by introducing steric "speed bumps" or electrostatically switchable gates. A mechanism for the absorption of energy can also be included by adding photoactive, catalytically active, or redox-active recognition sites, or even charges and dipoles...
March 24, 2017: Chemical Society Reviews
https://www.readbyqxmd.com/read/28333377/circadian-rhythms-in-adipose-tissue-physiology
#20
Jana-Thabea Kiehn, Anthony H Tsang, Isabel Heyde, Brinja Leinweber, Isa Kolbe, Alexei Leliavski, Henrik Oster
The different types of adipose tissues fulfill a wide range of biological functions-from energy storage to hormone secretion and thermogenesis-many of which show pronounced variations over the course of the day. Such 24-h rhythms in physiology and behavior are coordinated by endogenous circadian clocks found in all tissues and cells, including adipocytes. At the molecular level, these clocks are based on interlocked transcriptional-translational feedback loops comprised of a set of clock genes/proteins. Tissue-specific clock-controlled transcriptional programs translate time-of-day information into physiologically relevant signals...
March 16, 2017: Comprehensive Physiology
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