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https://www.readbyqxmd.com/read/29338733/effect-of-metatarsal-osteotomy-and-open-lateral-soft-tissue-procedure-on-sesamoid-position-radiological-assessment
#1
Young Rak Choi, Sang-June Lee, Jun Hyun Kim, Tae Ho Kim, Chi Hoon Oh
BACKGROUND: Incomplete sesamoid reduction is a potential risk factor for the recurrence of hallux valgus. The purpose of this study was to radiologically investigate changes in sesamoid position after chevron osteotomy and the open lateral soft tissue procedure. METHODS: Sixty-eight feet that underwent operative correction for hallux valgus deformity were reviewed consecutively. The hallux valgus angle (HVA), first to second intermetatarsal angle (IMA), tibial sesamoid position (TSP), distance of the fibular sesamoid (DFS), and translation of the metatarsal head (TMH) were evaluated preoperatively and at final follow-up...
January 16, 2018: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/29307742/is-double-metatarsal-osteotomy-superior-to-proximal-chevron-osteotomy-in-treatment-of-hallux-valgus-with-increased-distal-metatarsal-articular-angle
#2
Chul Hyun Park, Woo-Chun Lee
We compared the results of proximal chevron osteotomy and double metatarsal osteotomy for hallux valgus with an increased distal metatarsal articular angle (DMAA). From October 2008 to December 2012, first metatarsal osteotomies were performed in 64 patients (69 feet) with symptomatic hallux valgus associated with an increased DMAA. Proximal chevron with Akin osteotomy and lateral soft tissue release was performed in 46 feet (PCO group); double metatarsal osteotomy and Akin osteotomy without lateral soft tissue release was performed in 23 feet (DMO group)...
January 5, 2018: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/29303586/denaturants-alter-the-flux-through-multiple-pathways-in-the-folding-of-pdz-domain
#3
Zhenxing Liu, Dave Thirumalai
Although we understand many aspects of how small proteins (number of residues less than about hundred) fold, it is a major challenge to understand how large proteins self-assemble. To partially overcome this challenge, we performed simulations using the Self-Organized Polymer model with Side Chains (SOP-SC) in guanidinium chloride (GdmCl), using the Molecular Transfer Model (MTM), to describe the folding of the 110-residue PDZ3 domain. The simulations reproduce the folding thermodynamics accurately including the melting temperature (Tm), the stability of the folded state with respect to the unfolded state...
January 5, 2018: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/29243927/orbitally-matched-edge-doping-in-graphene-nanoribbons
#4
Rebecca A Durr, Danny Haberer, Yea-Lee Lee, Raymond Blackwell, Alin Miksi Kalayjian, Tomas Marangoni, Jisoon Ihm, Steven G Louie, Felix R Fischer
A series of trigonal planar N-, O-, and S-dopant atoms incorporated along the convex protrusion lining the edges of bottom-up synthesized chevron graphene nanoribbons (cGNRs) induce a characteristic shift in the energy of conduction and valence band edge states along with a significant reduction of the band gap of up to 0.3 eV per dopant atom per monomer. A combination of scanning probe spectroscopy and density functional theory (DFT) calculations reveals that the direction and the magnitude of charge transfer between the dopant atoms and the cGNR backbone are dominated by inductive effects and follow the expected trend in electronegativity...
December 15, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29241361/clinical-and-radiological-outcomes-comparing-percutaneous-chevron-akin-osteotomies-vs-open-scarf-akin-osteotomies-for-hallux-valgus
#5
Mun Chun Lai, Inderjeet Singh Rikhraj, Yew Lok Woo, William Yeo, Yung Chuan Sean Ng, Kevin Koo
BACKGROUND: Minimally invasive surgeries have gained popularity due to less soft tissue trauma and better wound healing. To date, limited studies have compared the outcomes of percutaneous and open osteotomies. This study aims to investigate the clinical and radiological outcomes of percutaneous chevron-Akin osteotomies vs open scarf-Akin osteotomies at 24-month follow-up. METHOD: We reviewed a prospectively collected database in a tertiary hospital hallux valgus registry...
December 1, 2017: Foot & Ankle International
https://www.readbyqxmd.com/read/29201305/biomechanical-comparison-study-of-three-fixation-methods-for-proximal-chevron-osteotomy-of-the-first-metatarsal-in-hallux-valgus
#6
Jin Su Kim, Hun Ki Cho, Ki Won Young, Ji Soo Kim, Kyung Tai Lee
Background: Fixation of proximal chevron metatarsal osteotomy has been accomplished using K-wires traditionally and with a locking plate recently. However, both methods have many disadvantages. Hence, we developed an intramedullary fixation technique using headless cannulated screws and conducted a biomechanical study to evaluate the superiority of the technique to K-wire and locking plate fixations. Methods: Proximal chevron metatarsal osteotomy was performed on 30 synthetic metatarsal models using three fixation techniques...
December 2017: Clinics in Orthopedic Surgery
https://www.readbyqxmd.com/read/29199756/a-ferroelectric-liquid-crystal-confined-in-cylindrical-nanopores-reversible-smectic-layer-buckling-enhanced-light-rotation-and-extremely-fast-electro-optically-active-goldstone-excitations
#7
Mark Busch, Andriy V Kityk, Wiktor Piecek, Tommy Hofmann, Dirk Wallacher, Sylwia Całus, Przemysław Kula, Martin Steinhart, Manfred Eich, Patrick Huber
The orientational and translational order of a thermotropic ferroelectric liquid crystal (2MBOCBC) imbibed in self-organized, parallel, cylindrical pores with radii of 10, 15, or 20 nm in anodic aluminium oxide monoliths (AAO) are explored by high-resolution linear and circular optical birefringence as well as neutron diffraction texture analysis. The results are compared to experiments on the bulk system. The native oxidic pore walls do not provide a stable smectogen wall anchoring. By contrast, a polymeric wall grafting enforcing planar molecular anchoring results in a thermal-history independent formation of smectic C* helices and a reversible chevron-like layer buckling...
December 4, 2017: Nanoscale
https://www.readbyqxmd.com/read/29177282/dense-monolayer-films-of-atomically-precise-graphene-nanoribbons-on-metallic-substrates-enabled-by-direct-contact-transfer-of-molecular-precursors
#8
Jacob D Teeter, Paulo S Costa, Percy Zahl, Timothy H Vo, Mikhail Shekhirev, Wenwu Xu, Xiao Cheng Zeng, Axel Enders, Alexander Sinitskii
Atomically precise graphene nanoribbons (GNRs) of two types, chevron GNRs and N = 7 straight armchair GNRs (7-AGNRs), have been synthesized through a direct contact transfer (DCT) of molecular precursors on Au(111) and gradual annealing. This method provides an alternative to the conventional approach for the deposition of molecules on surfaces by sublimation and simplifies preparation of dense monolayer films of GNRs. The DCT method allows deposition of molecules on a surface in their original state and then studying their gradual transformation to polymers to GNRs by scanning tunneling microscopy (STM) upon annealing...
November 27, 2017: Nanoscale
https://www.readbyqxmd.com/read/29167752/a-prospective-study-of-distal-metatarsal-chevron-osteotomies-with-k-wire-fixations-to-treat-hallux-valgus-deformities
#9
M N Baig, Usman Baig, Ali Tariq, Robert Din
Introduction Hallux valgus is one of the most common forefoot deformities worldwide. Females are affected more often than males. The three most common clinical symptoms are the painful bunion, transfer metatarsalgia, and hammer or claw toes. Methods This case series consisted of 20 patients who had chevron osteotomy from January 2015 to January 2016. The clinical assessment was measured by The American Orthopedic Foot and Ankle Score (AOFAS), and radiologic assessment was determined by preoperative and postoperative hallux valgus angle (HVA) and intermetatarsal angle (IMA)...
September 20, 2017: Curēus
https://www.readbyqxmd.com/read/29148848/corrigendum
#10
(no author information available yet)
Klemola T, Leppilahti J, Laine V, et al. Effect of first tarsometatarsal joint derotational arthrodesis on first ray dynamic stability compared to distal chevron osteotomy. Foot Ankle Int. 2017;38(8):847-854. (Original DOI: 10.1177/1071100717706153).
November 1, 2017: Foot & Ankle International
https://www.readbyqxmd.com/read/29143040/probing-optical-excitations-in-chevron-like-armchair-graphene-nanoribbons
#11
Richard Denk, Alberto Lodi-Rizzini, Shudong Wang, Michael Hohage, Peter Zeppenfeld, Jinming Cai, Roman Fasel, Pascal Ruffieux, Reinhard Franz Josef Berger, Zongping Chen, Akimitsu Narita, Xinliang Feng, Klaus Müllen, Roberto Biagi, Valentina De Renzi, Deborah Prezzi, Alice Ruini, Andrea Ferretti
The bottom-up fabrication of graphene nanoribbons (GNRs) has opened new opportunities to specifically tune their electronic and optical properties by precisely controlling their atomic structure. Here, we address excitation in GNRs with periodic structural wiggles, the so-called chevron GNRs. Based on reflectance difference and high-resolution electron energy loss spectroscopies together with ab initio simulations, we demonstrate that their excited-state properties are of excitonic nature. The spectral fingerprints corresponding to different reaction stages in their bottom-up fabrication are also unequivocally identified, allowing us to follow the exciton build-up from the starting monomer precursor to the final GNR structure...
November 16, 2017: Nanoscale
https://www.readbyqxmd.com/read/29117197/new-records-of-the-dolphin-albertocetus-meffordorum-odontoceti-xenorophidae-from-the-lower-oligocene-of-south-carolina-encephalization-sensory-anatomy-postcranial-morphology-and-ontogeny-of-early-odontocetes
#12
Robert W Boessenecker, Erum Ahmed, Jonathan H Geisler
We report five new specimens of xenorophid dolphins from North and South Carolina. Four of the specimens represent the xenorophid Albertocetus meffordorum, previously only known from the holotype skull. The other is a fragmentary petrosal from the upper Oligocene Belgrade Formation that we refer to Echovenator sp, indicating at least two xenorophids from that unit. Two of the Albertocetus meffordorum specimens are from the lower Oligocene Ashley Formation: 1) a partial skeleton with neurocranium, fragmentary mandible, ribs, vertebrae, and chevrons, and 2) an isolated braincase...
2017: PloS One
https://www.readbyqxmd.com/read/29027088/redescription-of-philometra-filiformis-stossich-1896-nematoda-philometridae-a-gonad-infecting-parasite-of-the-common-pandora-pagellus-erythrinus-linnaeus-sparidae-in-the-mediterranean-sea-including-new-taxonomic-features-revealed-by-sem
#13
František Moravec, Nessrine Ghanmi, Amira Chaabane, Lamia Gargouri, Jean-Lou Justine
The insufficiently known nematode species Philometra filiformis (Stossich, 1896) (Philometridae) is redescribed based on light and scanning electron microscopical (SEM) examinations of specimens collected from the ovaries of the type-host, the common pandora Pagellus erythrinus (Linnaeus) (Perciformes, Sparidae), from off the Mediterranean coast of Tunisia. The male of this species was studied with SEM for the first time, which revealed some new, taxonomically important morphological features. The male posterior end has a caudal mound consisting of two lateral parts widely separated dorsally from each other, four pairs of small adanal papillae, a pair of large but moderately developed papillae located posterior to the cloacal aperture and a pair of small phasmids...
November 2017: Systematic Parasitology
https://www.readbyqxmd.com/read/29018185/laterally-extended-atomically-precise-graphene-nanoribbons-with-improved-electrical-conductivity-for-efficient-gas-sensing
#14
Mohammad Mehdi Pour, Andrey Lashkov, Adrian Radocea, Ximeng Liu, Tao Sun, Alexey Lipatov, Rafal A Korlacki, Mikhail Shekhirev, Narayana R Aluru, Joseph W Lyding, Victor Sysoev, Alexander Sinitskii
Narrow atomically precise graphene nanoribbons hold great promise for electronic and optoelectronic applications, but the previously demonstrated nanoribbon-based devices typically suffer from low currents and mobilities. In this study, we explored the idea of lateral extension of graphene nanoribbons for improving their electrical conductivity. We started with a conventional chevron graphene nanoribbon, and designed its laterally extended variant. We synthesized these new graphene nanoribbons in solution and found that the lateral extension results in decrease of their electronic bandgap and improvement in the electrical conductivity of nanoribbon-based thin films...
October 10, 2017: Nature Communications
https://www.readbyqxmd.com/read/28945240/atomically-precise-graphene-nanoribbon-heterojunctions-from-a-single-molecular-precursor
#15
Giang D Nguyen, Hsin-Zon Tsai, Arash A Omrani, Tomas Marangoni, Meng Wu, Daniel J Rizzo, Griffin F Rodgers, Ryan R Cloke, Rebecca A Durr, Yuki Sakai, Franklin Liou, Andrew S Aikawa, James R Chelikowsky, Steven G Louie, Felix R Fischer, Michael F Crommie
The rational bottom-up synthesis of atomically defined graphene nanoribbon (GNR) heterojunctions represents an enabling technology for the design of nanoscale electronic devices. Synthetic strategies used thus far have relied on the random copolymerization of two electronically distinct molecular precursors to yield GNR heterojunctions. Here we report the fabrication and electronic characterization of atomically precise GNR heterojunctions prepared through late-stage functionalization of chevron GNRs obtained from a single precursor...
November 2017: Nature Nanotechnology
https://www.readbyqxmd.com/read/28934690/butyl-benzyl-phthalate-bbp-induces-caudal-defects-during-embryonic-development
#16
Nicole M Roy, Ewelina Zambrzycka, Jenna Santangelo
Butyl benzyl phthalate (BBP) is commonly added during the manufacturing of plastics to increase flexibility and elasticity. However, BBP leaches off of plastic and environment presence has been detected in soil, groundwater and sediment potentially effecting organisms in the environment. Given the widespread uses of BBP in household, consumer goods and the presence of BBP in the environment, studies on developmental toxicity are needed. Here, we use a zebrafish model to investigate the early developmental toxicity of BBP...
September 18, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28883495/spatially-resolved-optical-and-structural-properties-of-semi-polar-formula-see-text-al-x-ga1-x-n-with-x-up-to-0-56
#17
Jochen Bruckbauer, Zhi Li, G Naresh-Kumar, Monika Warzecha, Paul R Edwards, Ling Jiu, Yipin Gong, Jie Bai, Tao Wang, Carol Trager-Cowan, Robert W Martin
Pushing the emission wavelength of efficient ultraviolet (UV) emitters further into the deep-UV requires material with high crystal quality, while also reducing the detrimental effects of built-in electric fields. Crack-free semi-polar [Formula: see text] Al x Ga1-x N epilayers with AlN contents up to x = 0.56 and high crystal quality were achieved using an overgrowth method employing GaN microrods on m-sapphire. Two dominant emission peaks were identified using cathodoluminescence hyperspectral imaging...
September 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28805214/the-low-populated-folding-intermediate-of-a-mutant-of-the-fyn-sh3-domain-identified-by-a-simple-model
#18
Jing Wu, Guojun Chen, Zhuqing Zhang, Ping Zhang, Tao Chen
Experimental studies indicate that the A39V/N53P/V55L Fyn SH3 domain folds from the unfolded state to the native state via a low-populated on-pathway intermediate, whereas the folding of the wildtype is two-state-like. To get insights into the biophysical basis of their different folding mechanisms, we used native-centric models with and without additional transferrable, sequence-dependent nonnative hydrophobic interactions to study the folding behaviors of the Fyn SH3 domain and its mutant. The pure native-centric model predicts that both the wildtype and the mutant fold in a two-state manner, without any detectable intermediate...
August 23, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28795092/-data-characterizing-microfabricated-human-blood-vessels-created-via-hydrodynamic-focusing
#19
Kyle A DiVito, Michael A Daniele, Steven A Roberts, Frances S Ligler, André A Adams
This data article provides further detailed information related to our research article titled "Microfabricated Blood Vessels Undergo Neovascularization" (DiVito et al., 2017) [1], in which we report fabrication of human blood vessels using hydrodynamic focusing (HDF). Hydrodynamic focusing with advection inducing chevrons were used in concert to encase one fluid stream within another, shaping the inner core fluid into 'bullseye-like" cross-sections that were preserved through click photochemistry producing streams of cellularized hollow 3-dimensional assemblies, such as human blood vessels (Daniele et al...
October 2017: Data in Brief
https://www.readbyqxmd.com/read/28719558/recurrence-of-hallux-valgus-can-be-predicted-from-immediate-postoperative-non-weight-bearing-radiographs
#20
Chul Hyun Park, Woo-Chun Lee
BACKGROUND: The aims of this study were to identify risk factors for the recurrence of hallux valgus deformity and to clarify whether recurrence after surgery to treat hallux valgus can be predicted using radiographic parameters assessed on immediate postoperative non-weight-bearing radiographs. METHODS: A proximal chevron osteotomy combined with a distal soft-tissue procedure was performed by a single surgeon to treat moderate to severe hallux valgus deformity in 93 patients (117 feet)...
July 19, 2017: Journal of Bone and Joint Surgery. American Volume
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