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https://www.readbyqxmd.com/read/28094424/ex-vivo-torsional-properties-of-a-2-5-mm-veterinary-interlocking-nail-system-in-canine-femurs-comparison-with-a-2-4-mm-limited-contact-bone-plate
#1
Aline S Macedo, Noel M M Moens, John Runciman, Tom W G Gibson, Bruno W Minto
OBJECTIVE: To evaluate the torsional properties of the Targon(®) Vet Nail System (TVS) in small canine femurs and to compare these properties to those of the 2.4 mm LC-DCP(®) plates. METHODS: Thirty-six cadaveric femurs were allocated to three groups (n = 12). In all bones, points just distal to the lesser trochanter and just proximal to the fabellae were marked and a midshaft transverse osteotomy was performed. Group 1: bones were fixed with the 2.5 mm TVS with the bolts applied at the pre-identified marks...
January 17, 2017: Veterinary and Comparative Orthopaedics and Traumatology: V.C.O.T
https://www.readbyqxmd.com/read/28094256/cymbiola-nobilis-shell-toughening-mechanisms-in-a-crossed-lamellar-structure
#2
Hongmei Ji, Xiaowu Li, Daolun Chen
Natural structural materials with intricate hierarchical architectures over several length scales exhibit excellent combinations of strength and toughness. Here we report the mechanical response of a crossed-lamellar structure in Cymbiola nobilis shell via stepwise compression tests, focusing on toughening mechanisms. At the lower loads microcracking is developed in the stacked direction, and channel cracking along with uncracked-ligament bridging and aragonite fiber bridging occurs in the tiled direction. At the higher loads the main mechanisms involve cracking deflection in the bridging lamellae in the tiled direction alongside step-like cracking in the stacked direction...
January 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28088034/an-evaluation-of-nova-scotia-s-alcohol-ignition-interlock-program
#3
Ward G M Vanlaar, Marisela Mainegra Hing, Robyn D Robertson
Alcohol ignition interlock programs for offenders aim to reduce recidivism among convicted drink drivers. This study presents an evaluation of Nova Scotia's interlock program implemented in 2008 in order to assess its effectiveness to reduce impaired driving and to help identify areas for improvement. Data used include conviction and crash records of individual participants; provincial monthly counts of alcohol-related charges, convictions and fatal and serious crashes; and interlock logged events. Methods used include descriptive statistics, survival analysis, time series and logistic regression analysis...
January 11, 2017: Accident; Analysis and Prevention
https://www.readbyqxmd.com/read/28087882/cooperatively-interlocked-2-1-type-%C3%AF-system-anion-complexes
#4
Ryohei Yamakado, Yukina Ashida, Ryuma Sato, Yasuteru Shigeta, Nobuhiro Yasuda, Hiromitsu Maeda
As fascinating examples of closely connected multiple π-electronic systems involving noncovalent interactions, the cooperatively interlocked [2+1]-type anion complexes of well-designed π-electronic molecules are reported. The anion-responsive π-electronic molecules investigated in this study are the boron complexes of dipyrrolyldiketones bearing arylethynyl moieties at the pyrrole α-positions. Diverse substituents were introduced at the terminal aryl moieties, thus controlling the cooperativity to form [2+1]-type complexes...
January 14, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28078460/imbedding-pancreaticojejunostomy-used-in-pure-laparoscopic-pancreaticoduodenectomy-for-nondilated-pancreatic-duct
#5
Min Wang, Simiao Xu, Hang Zhang, Shuyou Peng, Feng Zhu, Renyi Qin
BACKGROUND: LPD has been cautiously regarded as feasible and safe for resection and reconstruction. However, anastomosis of the remnant pancreas is still thought to be a critical obstacle to the dissemination of LPD in general practice. This study presents a new technique of pancreaticojejunostomy for nondilated pancreatic duct and evaluates its safety and reliability. METHODS: From July 2014 to June 2015, a total of 52 patients underwent LPD with the new technique...
January 11, 2017: Surgical Endoscopy
https://www.readbyqxmd.com/read/28071605/carbon-nanotube-on-eraser-based-eco-friendly-fabrication-of-skin-like-large-area-matrix-of-flexible-strain-and-pressure-sensor
#6
Parikshit Sahatiya, Sushmee Badhulika
This paper reports a new type of electronic, recoverable skin-like pressure and strain sensor on flexible, bio-degradable pencil eraser substrate and has been fabricated by a solvent-free, low-cost and energy efficient process. Multi-walled carbon nanotube (MWCNTs) film as strain sensing element was patterned on pencil eraser by rolling pin and pre-compaction mechanical press which induces high interfacial bonding between the MWCNTs and eraser substrate which enables the sensor to achieve recoverability under ambient conditions...
January 10, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28066951/a-divalent-pentastable-redox-switchable-donor-acceptor-rotaxane
#7
Hendrik V Schröder, Henrik Hupatz, Andreas J Achazi, Sebastian Sobottka, Biprajit Sarkar, Beate Paulus, Christoph A Schalley
Donor-acceptor materials with small HOMO-LUMO gaps are important in molecular electronics, but often difficult to synthesise. A simple and efficient way to position tetrathiafulvalene (TTF) as the donor and naphthalene diamide (NDI) as the acceptor in close proximity to each other in a divalent crown/ammonium pseudo[2]rotaxane is presented. The divalent design provides high chelate cooperativity and much stronger binding compared to a monovalent analogue. The pseudo[2]rotaxane is then doubly interlocked by stoppering it in a catalyst-free 1,3-dipolar cycloaddition...
January 9, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28065516/ignition-interlock-laws-effects-on-fatal-motor-vehicle-crashes-1982-2013
#8
Emma E McGinty, Gregory Tung, Juliana Shulman-Laniel, Rose Hardy, Lainie Rutkow, Shannon Frattaroli, Jon S Vernick
INTRODUCTION: Alcohol-involved motor vehicle crashes are a major cause of preventable mortality in the U.S., leading to more than 10,000 fatalities in 2013. Ignition interlocks, or alcohol-sensing devices connected to a vehicle's ignition to prevent it from starting if a driver has a predetermined blood alcohol content (BAC) level, are a promising avenue for preventing alcohol-involved driving. This study sought to assess the effects of laws requiring ignition interlocks for some or all drunk driving offenders on alcohol-involved fatal crashes...
December 27, 2016: American Journal of Preventive Medicine
https://www.readbyqxmd.com/read/28048649/tu-h-bra-07-design-construction-and-installation-of-an-experimental-beam-line-for-the-development-of-mri-linac-compatible-electron-accelerator
#9
B Whelan, P Keall, L Holloway, S Gierman, J Schmerge, S Tantawi, A Tremaine, A Trautwein, B Scott, R Fahrig
PURPOSE: MRI guided radiation therapy (MRIgRT) is a rapidly growing field; however, Linac operation in MRI fringe fields represents an ongoing challenge. We have previously shown in-silico that Linacs could be redesigned to function in the in-line orientation with no magnetic shielding by adopting an RF-gun configuration. Other authors have also published insilico studies of Linac operation in magnetic fields; however to date no experimental validation data is published. This work details the design, construction, and installation of an experimental beam line to validate our in-silico results...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048089/su-f-t-160-commissioning-of-a-single-room-double-scattering-proton-therapy-system
#10
H Jin, S Ahmad, Y Chen, V Keeling, A Lau, M Islam, C Ferreira, S Ferguson
PURPOSE: To report the detailed commissioning experience for a compact double-scattering Mevion S250 proton therapy system at a University Cancer Center site. METHODS: The commissioning of the proton therapy system mainly consisted of ensuring integrity of mechanical and imaging system, beam data collection, and commissioning of a treatment planning system (TPS). First, mechanical alignment and imaging were tested including safety, interlocks, positional accuracy of couch and gantry, image quality, mechanical and imaging isocenter and so on...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28045380/structure-and-conformational-plasticity-of-the-u6-small-nuclear-ribonucleoprotein-core
#11
Eric J Montemayor, Allison L Didychuk, Honghong Liao, Panzhou Hu, David A Brow, Samuel E Butcher
U6 small nuclear RNA (snRNA) is a key component of the active site of the spliceosome, a large ribonucleoprotein complex that catalyzes the splicing of precursor messenger RNA. Prior to its incorporation into the spliceosome, U6 is bound by the protein Prp24, which facilitates unwinding of the U6 internal stem-loop (ISL) so that it can pair with U4 snRNA. A previously reported crystal structure of the `core' of the U6 small nuclear ribonucleoprotein (snRNP) contained an ISL-stabilized A62G mutant of U6 bound to all four RNA-recognition motif (RRM) domains of Prp24 [Montemayor et al...
January 1, 2017: Acta Crystallographica. Section D, Structural Biology
https://www.readbyqxmd.com/read/28043310/electromagnetic-navigation-in-distal-locking-of-long-diaphyseal-interlocking-intramedullary-nailing
#12
Zhentao Zhou, Xiaozhong Zhou, Bingchen Shan, Haibin Zhou, Zhengfeng Lu, Qirong Dong
OBJECTIVE: To describe the applications and effects of electromagnetic navigation (EN) technology in distal locking for the treatment of long diaphyseal fracture (LDF) with interlocking intramedullary nailing (IIN). STUDY DESIGN: An interventional study. PLACE AND DURATION OF STUDY: The Second Affiliated Hospital of Soochow University, China, from March 2013 to July 2014. METHODOLOGY: Patients who underwent IIN-LDF were selected...
December 2016: Journal of the College of Physicians and Surgeons—Pakistan: JCPSP
https://www.readbyqxmd.com/read/28040075/results-of-geriatric-distal-radius-fractures-treated-by-intramedullary-fixation
#13
Steffi S I Falk, Thomas Mittlmeier, Georg Gradl
INTRODUCTION: Distal radius fracture are common injuries but no gold standard for their therapy exists. The aim of this study was to evaluate the quality of fracture care in distal radius fractures using an intramedullary implant (Targon DR interlocking nail). The nail had been developed to minimize the surgical exposure, increase fixation strength, to prevent tendon irritations and to allow for a fast return to activity. PATIENTS AND METHODS: Prospective study reports the result of 43 patients with an age over 70 years (range 70-91 years) treated by closed reduction and intramedullary fixation...
December 2016: Injury
https://www.readbyqxmd.com/read/28040070/humeral-head-necrosis-after-proximal-humeral-nailing-what-are-the-reasons-for-bad-outcomes
#14
Birgit Zirngibl, Roland Biber, Hermann Josef Bail
INTRODUCTION: Humeral head necrosis (HHN) remains a major problem in fracture care. Neither its occurrence, its extend, nor its impact on clinical outcomes is predictable on the long term. This study was designed to evaluate clinical and radiological outcomes in patients depending on the influence of HHN. PATIENTS AND METHODS: 32 patients with a 3-6 year follow up participated in this study. Their humeral fractures had been stabilized with a standard Targon PH nail (Aesculap, Tuttlingen, Germany) for an acute humeral head fracture...
December 2016: Injury
https://www.readbyqxmd.com/read/28034610/anterior-tibial-artery-pseudoaneurysm-due-to-interlocking-bolt-of-tibial-nail-a-case-report-and-review
#15
Nitesh Gahlot, Rajendra Kumar Kanojia
Vascular injuries associated with the tibial nailing have been reported in few case reports. We here report a unique case of anterior tibial artery (ATA) pseudoaneurysm caused by the second proximal coronal interlocking bolt. We found that the position of interlocking bolts on the nail brings them very close to the anatomical positions of arteries in leg. The reports of ATA injury by interlocking bolts highlight the need for reconsidering the nail design and screw hole positions.
December 26, 2016: Acta Orthopaedica et Traumatologica Turcica
https://www.readbyqxmd.com/read/28024599/ca-p-bioactive-coating-prepared-by-combining-microwave-hydrothermal-and-supersonic-atmospheric-plasma-spraying-methods
#16
Yangyang Su, Kezhi Li, Leilei Zhang, Shameel Farhan, Shoujie Liu, Guoge Shi
Ca-P based coatings on carbon/carbon composite (C/C) were manufactured via a combined method comprising of microwave-hydrothermal (MH) and supersonic atmospheric plasma spraying (SAPS) techniques. However, a weak mutual interaction between the coating and C/C substrate has been a critical issue for a long time. Herein, we reported a new method for shear strength enhancement without compromising the osteoconductivity and osteoproductivity. Results showed that the inner layer has a strong mechanical interlocking with C/C substrate and the failure mode of outer layer changed from the coating cohesion (within the coating) to adhesive (at the coating/substrate interface) fracture...
March 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28011321/cuticular-body-hairs-mediate-clumping-of-small-camponotus-floridanus-larvae
#17
Yiwen Wang, Renata Zuber, Annette Laudahn, Jürgen Berger, Bernard Moussian
The body surface of insects usually carries cuticular hairs. Commonly, important functions of these structures are to prevent drowning and to defend against predators. Here, we report on our studies on hairs at the surface of larvae of the ant species Camponotus floridanus and Camponotus sericeiventris. First, we present data supporting the hypothesis that anti-drowning properties of the surface might rely on cuticular hairs. Second, we show that especially in young larvae body hairs serve as attachment and interlocking devices mediating clumping of larvae facilitating transport by workers...
December 20, 2016: Arthropod Structure & Development
https://www.readbyqxmd.com/read/28008936/enhanced-locomotion-efficiency-of-a-bio-inspired-walking-robot-using-contact-surfaces-with-frictional-anisotropy
#18
Poramate Manoonpong, Dennis Petersen, Alexander Kovalev, Florentin Wörgötter, Stanislav N Gorb, Marlene Spinner, Lars Heepe
Based on the principles of morphological computation, we propose a novel approach that exploits the interaction between a passive anisotropic scale-like material (e.g., shark skin) and a non-smooth substrate to enhance locomotion efficiency of a robot walking on inclines. Real robot experiments show that passive tribologically-enhanced surfaces of the robot belly or foot allow the robot to grip on specific surfaces and move effectively with reduced energy consumption. Supplementing the robot experiments, we investigated tribological properties of the shark skin as well as its mechanical stability...
December 23, 2016: Scientific Reports
https://www.readbyqxmd.com/read/28008930/bio-inspired-self-shaping-ceramics
#19
Fabio L Bargardi, Hortense Le Ferrand, Rafael Libanori, André R Studart
Shaping ceramics into complex and intricate geometries using cost-effective processes is desirable in many applications but still remains an open challenge. Inspired by plant seed dispersal units that self-fold on differential swelling, we demonstrate that self-shaping can be implemented in ceramics by programming the material's microstructure to undergo local anisotropic shrinkage during heat treatment. Such microstructural design is achieved by magnetically aligning functionalized ceramic platelets in a liquid ceramic suspension, subsequently consolidated through an established enzyme-catalysed reaction...
December 23, 2016: Nature Communications
https://www.readbyqxmd.com/read/28006705/effect-of-calcium-oxide-cao-and-sawdust-on-adhesion-and-cohesion-characteristics-of-sewage-sludge-under-agitated-and-non-agitated-drying-conditions
#20
Wen-Yi Deng, Min-Hao Yuan, Jing Mei, Ya-Jun Liu, Ya-Xin Su
Stickiness phenomenon is widely observed in sewage sludge drying practices. This paper is aimed at demonstrating and comparing the sticky properties of sewage sludge through non-agitated and agitated drying tests specially designed for sewage sludge. Special attentions were paid to the effects of additives, i.e. CaO, fine sawdust (FSD) and coarse sawdust (CSD), on the adhesive and cohesive characteristics of sewage sludge. The results indicated that the sticky properties of the sludge were markedly different under the different testing methods, and was also greatly influenced by CaO or sawdust addition...
December 2, 2016: Water Research
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