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https://www.readbyqxmd.com/read/28211276/tuning-the-pseudospin-polarization-of-graphene-by-a-pseudo-magnetic-field
#1
Alexander Georgi, Peter Nemes-Incze, Ramon Carrillo-Bastos, Daiara Faria, Silvia Viola Kusminskiy, Dawei Zhai, Martin Schneider, Dinesh Subramaniam, Torge Mashoff, Nils Michael Freitag, Marcus Liebmann, Marco Pratzer, Ludger Wirtz, Colin R Woods, Roman Vladislavovich Gorbachev, Yang Cao, Kostya S Novoselov, Nancy Sandler, Markus Morgenstern
One of the intriguing characteristics of honeycomb lattices is the appearance of a pseudo-magnetic field as a result of mechanical deformation. In the case of graphene, the Landau quantization resulting from this pseudo-magnetic field has been measured using scanning tunneling microscopy. Here we show that a signature of the pseudo-magnetic field is a local sublattice symmetry breaking observable as a redistribution of the local density of states. This can be interpreted as a polarization of graphene's pseudospin due to a strain induced pseudo-magnetic field, in analogy to the alignment of a real spin in a magnetic field...
February 17, 2017: Nano Letters
https://www.readbyqxmd.com/read/28211058/a-feasibility-study-of-a-hybrid-breast-immobilization-system-for-early-breast-cancer-in-proton-beam-therapy
#2
Takeshi Arimura, Takashi Ogino, Takashi Yoshiura, Mitsugi Matsuyama, Naoaki Kondo, Hideki Miyazaki, Akari Sakuragi, Takayuki Ohara, Etsuyo Ogo, Yoshio Hishikawa
PURPOSE: We aimed to develop a new breast-immobilizing system for proton beam therapy (PBT) of early breast cancer (EBC) that would provide the optimum breast shape during the treatment as well as increased fixation reliability by reducing the influence of respiratory movement. METHODS: The breast-immobilizing system (HyBIS; Hybrid Breast-Immobilizing System) consists of a whole body immobilization system (WBIS), position converting device (to change patient position), photo scanning system, breast cup (made using a three-dimensional printer), breast cup fitting apparatus, breast cup holding device (to ensure the breast remains lifted in the supine position), and dedicated stretcher fixed to the WBIS (to carry the patient)...
February 16, 2017: Medical Physics
https://www.readbyqxmd.com/read/28209380/space-maintaining-management-in-maxillary-sinus-lifting-a-novel-technique-using-a-resorbable-polymeric-thermo-reversible-gel
#3
G Cossellu, G Farronato, D Farronato, G Ceschel, F Angiero
Several techniques have been proposed to achieve sinus floor elevation and the formation of new bone through the grafting of autologous, heterologous, or alloplastic materials. The grafted materials act as a scaffold for bone formation inside the maxillary sinus. This study investigated a non-graft sinus lifting procedure using a resorbable polymeric thermo-reversible gel. A space-maintaining approach to sinus lifting, using a resorbable polymeric thermo-reversible gel, was applied in 11 patients undergoing implant treatment in the atrophic posterior maxilla...
February 10, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28209278/the-impact-of-coronal-plane-alignment-on-polyethylene-wear-and-damage-in-total-knee-arthroplasty-a-retrieval-study
#4
Pieter-Jan T K Vandekerckhove, Matthew G Teeter, Douglas D R Naudie, James L Howard, Steven J MacDonald, Brent A Lanting
BACKGROUND: Coronal plane alignment is one of the contributing factors to polyethylene wear in total knee arthroplasty. METHODS: Based on 95 retrieved polyethylene inserts, wear and damage patterns were analyzed in relationship to the overall mechanical alignment and to the position of the tibial component. RESULTS: A progression of wear was observed with progressively mechanical varus alignment. However, there was significantly more damage in the lateral compartment in the mild and moderate varus group compared to the valgus group...
January 4, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28208670/eutrophication-and-warming-boost-cyanobacterial-biomass-and-microcystins
#5
Miquel Lürling, Frank van Oosterhout, Elisabeth Faassen
Eutrophication and warming are key drivers of cyanobacterial blooms, but their combined effects on microcystin (MC) concentrations are less studied. We tested the hypothesis that warming promotes cyanobacterial abundance in a natural plankton community and that eutrophication enhances cyanobacterial biomass and MC concentrations. We incubated natural seston from a eutrophic pond under normal, high, and extreme temperatures (i.e., 20, 25, and 30 °C) with and without additional nutrients added (eutrophication) mimicking a pulse as could be expected from projected summer storms under climate change...
February 11, 2017: Toxins
https://www.readbyqxmd.com/read/28207598/newly-formed-bone-induced-by-recombinant-human-bone-morphogenetic-protein-2-a-histological-observation
#6
Azumi Hirata, Takaaki Ueno, Peter K Moy
PURPOSE: To observe, histologically, bone induced by recombinant human bone morphogenetic protein-2 (rhBMP-2) in onlay grafted and sinus lifted alveolaris. MATERIAL AND METHODS: Eighteen patients were treated with rhBMP-2 at concentration 1.5 mg/mL with an absorbable collagen sponge (ACS). The treated bone was harvested with small trephine bur at 5 or 7 months after surgery for the micro Computer Scanning (CT) and light microscopic observation. RESULTS: Micro CT showed clearly 3-dimensional trabecular bone structure...
February 14, 2017: Implant Dentistry
https://www.readbyqxmd.com/read/28207597/implant-anchorage-in-the-nasopalatine-canal-for-the-rehabilitation-of-severely-atrophic-maxilla
#7
Pâmela Leticia Dos Santos, Gustavo Henrique Souza Silva, Raquel Damazia da Silva, Fernanda Rayssa Da Silva Pereira, Jéssica Lemos Gulinelli
PURPOSE: This study aimed to describe the clinical case of implant placement in the nasopalatine canal as an aid for atrophic maxilla rehabilitation. CASE REPORT: The surgical procedure was carried out in 2 stages, the first part consisted of a surgery to lift the maxillary sinus membrane associated with the xenogeneic bone placement and the second part consisted of the surgery for the implants placement, both under local anesthesia. A number of seven osseointegrated implants were placed in the maxilla, one was anchored in the nasopalatine canal region after having its neurovascular content emptied by means of the use of drill threads of the implant system...
February 14, 2017: Implant Dentistry
https://www.readbyqxmd.com/read/28206730/sinus-presurgical-evaluation-a-literature-review-and-a-new-classification-proposal
#8
Lorenzo Tavelli, Andrea E Borgonovo, Dino Re, Carlo Maiorana
Presurgical evaluation with cone beam computed tomography (CBCT) or computed tomography (CT) has become an essential tool for diagnosis and surgical planning, including maxillary sinus floor elevation. Before performing a sinus lift, the clinician's attention should not be only directed to the patency of the ostium through CBCT or CT, because many anatomical features could influence the surgical approach of sinus floor elevation. The goal of this article was to facilitate the communication between clinicians regarding the type of maxillary sinus, encourage in-depth analysis prior to surgery and reduce the risk of complications due to possible underestimation of important parameters...
February 15, 2017: Minerva Stomatologica
https://www.readbyqxmd.com/read/28205508/global-dynamics-of-non-equilibrium-gliding-in-animals
#9
Isaac Yeaton, Jake Socha, Shane Ross
Gliding flight - moving horizontally downward through the air without power - has evolved in a broad diversity of taxa and serves numerous ecologically relevant functions such as predator escape, expanding foraging locations, and finding mates, and has been suggested as an evolutionary pathway to powered flight. Historically, gliding has been conceptualized using the idealized conditions of equilibrium, in which the net aerodynamic force on the glider balances its weight. While this assumption is appealing for its simplicity, recent studies of glide trajectories have shown that equilibrium gliding is not the norm for most species...
February 16, 2017: Bioinspiration & Biomimetics
https://www.readbyqxmd.com/read/28205475/trigonometry-integrated-lift-technique-tilt-for-restoring-volar-tilt-in-distal-radius-fractures-description-of-technique-and-preliminary-results
#10
Sreedharan Sechachalam, Mala Satku, Jian Hao Kevin Wong, Lester Teong Jin Tan, Fok Chuan Yong
BACKGROUND: Restoration of extra-articular and intra-articular parameters are important considerations during operative fixation of distal radius fractures. Restoration of volar tilt by using visual estimation and the 'lift' technique has previously been described. The aim of our study was to describe a mathematical technique for accurately restoring the volar tilt of the distal radius to acceptable anatomic values. METHODS: A retrospective review of cases performed using the trigonometry-integrated ' lift' technique (TILT) was performed...
March 2017: Journal of Hand Surgery Asian-Pacific Volume
https://www.readbyqxmd.com/read/28204808/bone-morphogenetic-protein-2-enhances-the-osteogenic-differentiation-capacity-of-mesenchymal-stromal-cells-derived-from-human-bone-marrow-and-umbilical-cord
#11
Kulisara Marupanthorn, Chairat Tantrawatpan, Pakpoom Kheolamai, Duangrat Tantikanlayaporn, Sirikul Manochantr
Mesenchymal stromal cells (MSCs) are multipotent cells that can give rise to different cell types of the mesodermal lineages. They are powerful sources for cell therapy in regenerative medicine as they can be isolated from various tissues, and can be expanded and induced to differentiate into multiple lineages. Recently, the umbilical cord has been suggested as an alternative source of MSCs. Although MSCs derived from the umbilical cord can be induced to differentiate into osteoblasts with a phenotypic similarity to that of bone marrow-derived MSCs, the differentiation ability is not consistent...
February 1, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/28199538/analysis-of-factors-associated-with-rhytidectomy-malpractice-litigation-cases
#12
Aron Kandinov, Sean Mutchnick, Vaibhuv Nangia, Peter F Svider, Giancarlo F Zuliani, Mahdi A Shkoukani, Michael A Carron
Importance: This study investigates the financial burden of medical malpractice litigation associated with rhytidectomies, as well as factors that contribute to litigation and poor defendant outcomes, which can help guide physician practices. Objective: To comprehensively evaluate rhytidectomy malpractice litigation. Data Sources and Study Selection: Jury verdict and settlement reports related to rhytidectomy malpractice litigations were obtained using the Westlaw Next database...
February 9, 2017: JAMA Facial Plastic Surgery
https://www.readbyqxmd.com/read/28198798/patterned-transparent-electrode-with-a-continuous-distribution-of-silver-nanowires-produced-by-an-etching-free-patterning-method
#13
Kwonwoo Shin, Ji Sun Park, Jong Hun Han, Yunsu Choi, Dae Sung Chung, Se Hyun Kim
The outstanding electrical, optical, and mechanical properties of silver nanowire transparent electrodes are attractive for use in many optoelectronic devices, and the recent developments related to these electrodes have led to their commercialization. To more fully utilize the advantages of this technology, developing new process technologies in addition to performance improvements is important. In this report, we propose a novel ultra-simple patterning technology to generate a silver nanowire transparent layer and a unique patterned structure with continuously distributed silver nanowires without any etched areas...
February 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28198493/correction-the-magnitude-of-lift-forces-acting-on-drops-and-bubbles-in-liquids-flowing-inside-microchannels
#14
Claudiu A Stan, Audrey K Ellerbee, Laura Guglielmini, Howard A Stone, George M Whitesides
Correction for 'The magnitude of lift forces acting on drops and bubbles in liquids flowing inside microchannels' by Claudiu A. Stan et al., Lab Chip, 2013, 13, 365-376.
February 15, 2017: Lab on a Chip
https://www.readbyqxmd.com/read/28196279/effect-of-head-lift-exercise-on-kinematic-motion-of-the-hyolaryngeal-complex-and-aspiration-in-patients-with-dysphagic-stroke
#15
J S Park, N K Hwang, D H Oh, M Y Chang
The head lift exercise (HLE) is a head-raising workout performed in a supine position. This exercise facilitates activation of the submental muscles located above the hyoid bone in front of the neck. HLE is a potential method to improve the movement of the hyolaryngeal movement and swallowing functions. The purpose of this study was to investigate the effect of HLE on the hyolaryngeal movement and aspiration in patients with dysphagic stroke. A total of 27 patients with stroke were randomly assigned either into the experimental (n=13) or the control group (n=14)...
February 14, 2017: Journal of Oral Rehabilitation
https://www.readbyqxmd.com/read/28196182/what-surgeons-need-to-know-about-gender-confirmation-surgery-when-providing-care-for-transgender-individuals-a-review
#16
Jens U Berli, Gail Knudson, Lin Fraser, Vin Tangpricha, Randi Ettner, Frederic M Ettner, Joshua D Safer, Julie Graham, Stan Monstrey, Loren Schechter
Importance: In 2014, the US Department of Health and Human Services decided that its 1981 exclusion of transsexual surgical treatments from Medicare coverage was based on outdated, incomplete, and biased science and did not reflect current evidence or standards of care, and the exclusion was therefore lifted. As a direct result of this decision, surgeons nationwide are seeing an increase in consultations for surgical therapy to help transgender and gender-nonconforming individuals. Although some clinicians may have the technical training for such surgical procedures, in many cases, they may not have a full understanding of the complex and comprehensive care required to provide optimal health care for transgender individuals...
February 8, 2017: JAMA Surgery
https://www.readbyqxmd.com/read/28196148/from-the-track-to-the-ocean-using-flow-control-to-improve-marine-bio-logging-tags-for-cetaceans
#17
Giovani Fiore, Erik Anderson, C Spencer Garborg, Mark Murray, Mark Johnson, Michael J Moore, Laurens Howle, K Alex Shorter
Bio-logging tags are an important tool for the study of cetaceans, but superficial tags inevitably increase hydrodynamic loading. Substantial forces can be generated by tags on fast-swimming animals, potentially affecting behavior and energetics or promoting early tag removal. Streamlined forms have been used to reduce loading, but these designs can accelerate flow over the top of the tag. This non-axisymmetric flow results in large lift forces (normal to the animal) that become the dominant force component at high speeds...
2017: PloS One
https://www.readbyqxmd.com/read/28195977/fat-grip-resistance-training-improves-driving-performance-in-division-i-male-golfers
#18
Patrick M Cummings, Hunter S Waldman, Ben M Krings, JohnEric W Smith, Matthew J McAllister
Fat Grip (FG) training is implemented into strength and conditioning programs with the overall goal of increasing grip strength. Previous research assessing the effect of training with increased grip diameters compared to standard Olympic bar diameters has mainly been in acute settings. Therefore, the purpose of this study was to examine to effects FG training compared to normal diameter grip (CON) training during an eight week periodized resistance training (RT) program in Division I male golfers. Subjects (n = 10) were randomly assigned into two groups: the FG group (n = 5, scoring average: 75...
February 8, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28195975/the-high-bar-and-low-bar-back-squats-a-biomechanical-analysis
#19
Daniel J Glassbrook, Scott R Brown, Eric R Helms, J Scott Duncan, Adam G Storey
No prior study has compared the joint angle and ground reaction force (Fv) differences between the high-bar back-squat (HBBS) and low-bar back-squat (LBBS) above 90% 1RM. Six male powerlifters (height: 179.2 ± 7.8 cm; bodyweight: 87.1 ± 8.0 kg; age: 27.3 ± 4.2 years) of international level, six male Olympic weightlifters (height: 176.7 ± 7.7 cm; bodyweight: 83.1 ± 13 kg; age: 25.3 ± 3.1 years) of national level, and six recreationally trained male athletes (height: 181.9 ± 8.7 cm; bodyweight: 87.9 ± 15...
February 8, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28193020/viscoelastic-separation-of-particles-by-size-in-straight-rectangular-microchannels-a-parametric-study-for-a-refined-understanding
#20
Di Li, Xinyu Lu, Xiangchun Xuan
Microfluidic separation of particles has been implemented using a variety of force fields. We demonstrate in this work a continuous sheath-free separation of both a binary and a ternary particle mixture in viscoelastic polymer solutions through straight rectangular microchannels. This label-free separation arises from the flow-induced lift force that directs particles toward size-sensitive focusing positions in a high width/height channel. It is found to be a strong function of multiple experimental parameters, which is systematically investigated in terms of dimensionless numbers...
December 20, 2016: Analytical Chemistry
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