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Goniometry

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https://www.readbyqxmd.com/read/28920673/work-function-control-of-germanium-through-carborane-carboxylic-acid-surface-passivation
#1
Andrew C Serino, Mary E Anderson, Liban M A Saleh, Rafal Miroslaw Dziedzic, Harrison Mills, Liv K Heidenreich, Alexander M Spokoyny, Paul S Weiss
Self-assembled monolayers (SAMs) of carborane isomers with different dipole moments passivate germanium to modulate surface work function while maintaining chemical environment and surface energy. To identify head groups capable of monolayer formation on germanium surfaces, we studied thiol-, hydroxyl-, and carboxyl-terminated carboranes. These films were successfully formed with carboxylic acid head groups instead of the archetypal thiol, suggesting that the carborane cluster significantly affects head group reactivity...
September 18, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28902253/bacterial-adhesion-on-conventional-and-self-ligating-metallic-brackets-after-surface-treatment-with-plasma-polymerized-hexamethyldisiloxane
#2
Rogerio Amaral Tupinambá, Cristiane Aparecida de Assis Claro, Cristiane Aparecida Pereira, Celestino José Prudente Nobrega, Ana Paula Rosifini Alves Claro
Introduction: Plasma-polymerized film deposition was created to modify metallic orthodontic brackets surface properties in order to inhibit bacterial adhesion. Methods: Hexamethyldisiloxane (HMDSO) polymer films were deposited on conventional (n = 10) and self-ligating (n = 10) stainless steel orthodontic brackets using the Plasma-Enhanced Chemical Vapor Deposition (PECVD) radio frequency technique. The samples were divided into two groups according to the kind of bracket and two subgroups after surface treatment...
July 2017: Dental Press Journal of Orthodontics
https://www.readbyqxmd.com/read/28887986/biomineralized-diamond-like-carbon-films-with-incorporated-titanium-dioxide-nanoparticles-improved-bioactivity-properties-and-reduced-biofilm-formation
#3
F S Lopes, J R Oliveira, J Milani, L D Oliveira, J P B Machado, V J Trava-Airoldi, A O Lobo, F R Marciano
Recently, the development of coatings to protect biomedical alloys from oxidation, passivation and to reduce the ability for a bacterial biofilm to form after implantation has emerged. Diamond-like carbon films are commonly used for implanted medical due to their physical and chemical characteristics, showing good interactions with the biological environment. However, these properties can be significantly improved when titanium dioxide nanoparticles are included, especially to enhance the bactericidal properties of the films...
December 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28884315/is-digital-photography-an-accurate-and-precise-method-for-measuring-range-of-motion-of-the-hip-and-knee
#4
Russell R Russo, Matthew B Burn, Sabir K Ismaily, Brayden J Gerrie, Shuyang Han, Jerry Alexander, Christopher Lenherr, Philip C Noble, Joshua D Harris, Patrick C McCulloch
BACKGROUND: Accurate measurements of knee and hip motion are required for management of musculoskeletal pathology. The purpose of this investigation was to compare three techniques for measuring motion at the hip and knee. The authors hypothesized that digital photography would be equivalent in accuracy and show higher precision compared to the other two techniques. METHODS: Using infrared motion capture analysis as the reference standard, hip flexion/abduction/internal rotation/external rotation and knee flexion/extension were measured using visual estimation, goniometry, and photography on 10 fresh frozen cadavers...
September 7, 2017: Journal of Experimental Orthopaedics
https://www.readbyqxmd.com/read/28875099/surface-functionalization-of-3d-printed-plastics-via-initiated-chemical-vapor-deposition
#5
Christine Cheng, Malancha Gupta
3D printing is a useful fabrication technique because it offers design flexibility and rapid prototyping. The ability to functionalize the surfaces of 3D-printed objects allows the bulk properties, such as material strength or printability, to be chosen separately from surface properties, which is critical to expanding the breadth of 3D printing applications. In this work, we studied the ability of the initiated chemical vapor deposition (iCVD) process to coat 3D-printed shapes composed of poly(lactic acid) and acrylonitrile butadiene styrene...
2017: Beilstein Journal of Nanotechnology
https://www.readbyqxmd.com/read/28872411/smartphone-photography-utilized-to-measure-wrist-range-of-motion
#6
Eric R Wagner, Megan Conti Mica, Alexander Y Shin
The purpose was to determine if smartphone photography is a reliable tool in measuring wrist movement. Smartphones were used to take digital photos of both wrists in 32 normal participants (64 wrists) at extremes of wrist motion. The smartphone measurements were compared with clinical goniometry measurements. There was a very high correlation between the clinical goniometry and smartphone measurements, as the concordance coefficients were high for radial deviation, ulnar deviation, wrist extension and wrist flexion...
January 1, 2017: Journal of Hand Surgery, European Volume
https://www.readbyqxmd.com/read/28861038/alleviation-of-motor-impairments-in-patients-with-cerebral-palsy-acute-effects-of-whole-body-vibration-on-stretch-reflex-response-voluntary-muscle-activation-and-mobility
#7
Anne Krause, Eckhard Schönau, Albert Gollhofer, Ibrahim Duran, Anja Ferrari-Malik, Kathrin Freyler, Ramona Ritzmann
INTRODUCTION: Individuals suffering from cerebral palsy (CP) often have involuntary, reflex-evoked muscle activity resulting in spastic hyperreflexia. Whole-body vibration (WBV) has been demonstrated to reduce reflex activity in healthy subjects, but evidence in CP patients is still limited. Therefore, this study aimed to establish the acute neuromuscular and kinematic effects of WBV in subjects with spastic CP. METHODS: 44 children with spastic CP were tested on neuromuscular activation and kinematics before and immediately after a 1-min bout of WBV (16-25 Hz, 1...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28856053/microscope-objective-based-4%C3%AF-spectroscopic-tissue-scattering-goniometry
#8
Z J Simmons, J D Rogers
The measurement of optical scattering as a function of angle, goniometry, can provide a wealth of information about tissue. The goniometry technique described here measures the intensity profile at the pupil planes of two microscope objectives with a scattering sample between them. The maximum observable scattering angle is extended by employing off-axis illumination. This configuration permits several advantages including: i) rapid measurement of scattering into 4π sr to characterize the entire scattering phase function in isotropic tissue, ii) sensitivity to axially asymmetric scattering from anisotropic fibrous tissue, iii) selective interrogation of small regions within spatially inhomogenous tissue, iv) concurrent measurement of scattering coefficient μs , and v) measurement of wavelength dependent scattering properties via spectrally tunable source...
August 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/28841697/dynamic-thoracohumeral-kinematics-are-dependent-upon-the-etiology-of-the-shoulder-injury
#9
Juan López-Pascual, Álvaro Page, Pilar Serra-Añó
Obtaining kinematic patterns that depend on the shoulder injury may be important when planning rehabilitation. The main goal of this study is to explore whether the kinematic patterns of continuous and repetitive shoulder elevation motions are different according to the type of shoulder injury in question, specifically tendinopathy or rotator cuff tear, and to analyze the influence of the load handled during its assessment. For this purpose, 19 individuals with tendinopathy and 9 with rotator cuff tear performed a repetitive scaption movement that was assessed with stereophotogrammetry...
2017: PloS One
https://www.readbyqxmd.com/read/28831135/study-on-physio-chemical-properties-of-plasma-polymerization-in-c2h2-n2-plasma-and-their-impact-on-col-x
#10
Samaneh Ghafouri, Sara Abdijahed, Shirin Farivar, Seyed Iman Hosseini, Fatemeh Rezaei, Abdolreza Ardeshirylajimi, Babak Shokri
Nitrogen-containing plasma polymerization is of considerable interest for tissue engineering due to their properties on cell adhesion and mesenchymal stem cells (MSCs) response. In this study, low-pressure RF plasma of acetylene and nitrogen was used to deposit nitrogen-containing plasma polymerized coatings on several substrates. Deposition kinetics and surface characteristics of coatings were investigated in terms of RF power and gas flow ratio. OES was used to monitor the plasma process and investigate the relation between the film structure and plasma species...
August 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28822862/testing-the-performance-of-superhydrophobic-aluminum-surfaces
#11
F Javier Montes Ruiz-Cabello, Pablo F Ibáñez-Ibáñez, J Francisco Gómez-Lopera, José Martínez-Aroza, Miguel Cabrerizo-Vílchez, Miguel A Rodríguez-Valverde
The analysis of wetting properties of superhydrophobic surfaces may be a difficult task due to the restless behavior of drops on this type of surfaces and the limitations of goniometry for high contact angles. A method to validate the performance of superhydrophobic surfaces, rather than standard goniometry, is required. In this work, we used bouncing drop dynamics as a useful tool to predict the water repellency of different superhydrophobic surfaces. From bouncing drop experiments conducted over a wide range of superhydrophobic surfaces, we found that those surfaces with a proper roughness degree and homogeneous chemical composition showed higher water-repellency...
August 12, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28807566/electrospun-collagen-based-nanofibres-a-sustainable-material-for-improved-antibiotic-utilisation-in-tissue-engineering-applications
#12
Ivan J Hall Barrientos, Eleonora Paladino, Peter Szabó, Sarah Brozio, Peter J Hall, Charles I Oseghale, Melissa K Passarelli, Susan J Moug, Richard A Black, Clive G Wilson, Romana Zelkó, Dimitrios A Lamprou
For the creation of scaffolds in tissue engineering applications, it is essential to control the physical morphology of fibres and to choose compositions which do not disturb normal physiological function. Collagen, the most abundant protein in the human body, is a well-established biopolymer used in electrospinning compositions. It shows high in-vivo stability and is able to maintain a high biomechanical strength over time. In this study, the effects of collagen type I in polylactic acid-drug electrospun scaffolds for tissue engineering applications are examined...
August 12, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28750987/evaluation-of-knee-range-of-motion-correlation-between-measurements-using-a-universal-goniometer-and-a-smartphone-goniometric-application
#13
Rafael Aparecido Dos Santos, Viviane Derhon, Michelle Brandalize, Danielle Brandalize, Luciano Pavan Rossi
BACKGROUND: Goniometers are commonly used to measure range of motion in the musculoskeletal system. Recently smartphone goniometry applications have become available to clinicians. OBJECTIVE: Compare angular measures using a universal goniometer and a smartphone application. METHODS: Thirty four healthy women with at least 20° of limited range of motion regarding knee extension were recruited. Knee flexion angles of the dominant limb were measured with a universal goniometer and the ROM(©) goniometric application for the smartphone...
July 2017: Journal of Bodywork and Movement Therapies
https://www.readbyqxmd.com/read/28750788/autologous-platelet-concentrates-as-treatment-for-avascular-necrosis-of-femoral-head-in-a-dog
#14
Estefanía Parra, Andrea Vergara, Raúl F Silva
Avascular necrosis of the femoral head is a developmental disturbance that generally affects young dogs of small breeds and produces ischemic necrosis of the femoral head resulting in an incongruous and malformed joint. The most common treatment is the excisional arthroplasty of the head and femoral neck. The aim of this study is to describe the treatment of avascular necrosis in a Yorkshire dog using intra-articular injections of autologous platelet concentrate. Evaluations were made at 0, 15, 30, 60, and 120 days of treatment, describing the following parameters: clinical gait analysis, perimetry, goniometry, and radiographic evaluations...
March 2017: Topics in Companion Animal Medicine
https://www.readbyqxmd.com/read/28745494/surface-anchored-thiol-reactive-soft-interfaces-engineering-effective-platforms-for-biomolecular-immobilization-and-sensing
#15
Tugce Nihal Gevrek, Irem Kosif, Amitav Sanyal
Fabrication of antibiofouling, specifically reactive polymeric coatings that undergo facile functionalization with thiol-bearing small molecules and ligands, yields effective platforms for biomolecular immobilization and sensing. Poly(ethylene glycol) (PEG)-based copolymers containing alkoxysilyl groups to enable surface-anchoring and furan-protected maleimide groups as latent thiol-reactive moieties as side-chains were synthesized. Reactive interfaces were obtained by coating these copolymers onto Si/SiO2 or glass surfaces and activating the maleimide groups to their thiol-reactive forms via thermal treatment...
August 8, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28740988/sandwiched-gold-pnipam-gold-microstructures-for-smart-plasmonics-application-towards-the-high-detection-limit-and-raman-quantitative-measurements
#16
R Elashnikov, D Mares, T Podzimek, V Švorčík, O Lyutakov
A smart plasmonic sensor, comprising a layer of a stimuli-responsive polymer sandwiched between two gold layers, is reported. As a stimuli-responsive material, a monolayer of poly(N-isopropylacrylamide) (PNIPAm) crosslinked globules is used. A quasi-periodic structure of the top gold layer facilitates efficient excitation and serves as a support for plasmon excitation and propagation. The intermediate layer of PNIPAm efficiently entraps targeted molecules from solutions. The sensor structure was optimized for efficient light focusing in the "active" PNIPAm layer...
August 7, 2017: Analyst
https://www.readbyqxmd.com/read/28735233/a-model-system-to-mimic-environmentally-active-surface-film-roughness-and-hydrophobicity
#17
Jacob S Grant, Scott K Shaw
This work presents the development and initial assessment of a laboratory platform to allow quantitative studies on model urban films. The platform consists of stearic acid and eicosane mixtures that are solution deposited from hexanes onto smooth, solid substrates. We show that this model has distinctive capabilities to better mimic a naturally occurring film's morphology and hydrophobicity, two important parameters that have not previously been incorporated into model film systems. The physical and chemical properties of the model films are assessed using a variety of analytical instruments...
October 2017: Chemosphere
https://www.readbyqxmd.com/read/28733044/management-of-displaced-inferior-patellar-pole-fractures-with-modified-tension-band-technique-combined-with-cable-cerclage-using-cable-grip-system
#18
Xu Yang, Qinfen Wu, Chin-Hui Lai, Xin Wang
INTRODUCTION: We present a modified tension band technique combined with cable cerclage using Cable Grip System for the treatment of displaced inferior patellar pole fractures and report the knee functional outcome. PATIENTS AND METHODS: The patients who had had operative treatment of a displaced inferior patellar pole fracture (AO/OTA 34-A1) between December 2013 and December 2015 were studied retrospectively. Eleven consecutive patients had had open reduction and internal fixation with the modified technique using Cable Grip System, of whom, five males and six females with an average age of 60...
July 13, 2017: Injury
https://www.readbyqxmd.com/read/28727103/effects-of-dietary-calcium-fructoborate-supplementation-on-joint-comfort-and-flexibility-and-serum-inflammatory-markers-in-dogs-with-osteoarthritis
#19
A K Price, M R C de Godoy, T A Harper, K E Knap, S Joslyn, Z Pietrzkowski, B K Cross, K B Detweiler, K S Swanson
Our objective was to evaluate the short-term effects of calcium fructoborate (CFB) on gait, joint range of motion, serum inflammatory markers, and owner perception of pain in client-owned dogs. We used 59 osteoarthritic dogs with impairment, with dogs being randomly assigned to 4 treatments: placebo (60 mg fructose; = 15), low dose (69 mg CFB; = 14), high dose (127 mg CFB; = 14), or combination (69 mg CFB, 500 mg glucosamine hydrochloride and 200 mg chondroitin sulfate; = 16). Dogs up to 22.9 kg received 1 capsule/d, while dogs weighing 23 to 50 kg received 2 capsules/d...
July 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28719187/exploring-the-role-of-habitat-on-the-wettability-of-cicada-wings
#20
Junho Oh, Catherine E Dana, Sungmin Hong, Jessica K Román, Kyoo Dong Jo, Je Won Hong, Jonah Nguyen, Donald M Cropek, Marianne Alleyne, Nenad Miljkovic
Evolutionary pressure has pushed many extant species to develop micro/nanostructures that can significantly affect wettability and enable functionalities such as droplet jumping, self-cleaning, antifogging, antimicrobial, and antireflectivity. In particular, significant effort is underway to understand the insect wing surface structure to establish rational design tools for the development of novel engineered materials. Most studies, however, have focused on superhydrophobic wings obtained from a single insect species, in particular, the Psaltoda claripennis cicada...
August 16, 2017: ACS Applied Materials & Interfaces
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