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https://www.readbyqxmd.com/read/28881202/the-effect-of-solvent-polarity-on-wormlike-micelles-using-dipropylene-glycol-dpg-as-a-cosolvent-in-an-anionic-zwitterionic-mixed-surfactant-system
#1
Hanqiu Jiang, Gregory Beaucage, Karsten Vogtt, Michael Weaver
HYPOTHESIS: The behavior/properties of micellar solutions are governed by Coulombic interactions that are influenced by the polarity of the surfactant head groups, hydrophobic tails, and solvent molecules. The addition of co-solvent should have a direct impact on solvent polarity and the size of the micelles are expected to decrease accordingly. EXPERIMENTS: In this study, a mixed surfactant system is studied composed of a common anionic surfactant, sodium laureth sulfate-1, modified by a zwitterionic surfactant, cocamidopropyl betaine in deuterated water...
August 31, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28860567/the-novel-link-between-planar-m%C3%A3-bius-aromatic-and-third-order-nonlinear-optical-properties-of-metal-bridged-polycyclic-complexes
#2
Li Wang, Jinting Ye, Hongqiang Wang, Haiming Xie, Yongqing Qiu
Metal-bridged polcyclic aromatic complexes, exhibiting unusual optical effects such as near-infrared photoluminescence with particularly large Stokes shifts, long lifetimes and aggregation enhancement, have been established as unique "carbonloong chemistry". Herein, the electronic structures, aromaticities, absorption spectra and third order nonlinear optical (NLO) responses of metal-bridged polcyclic aromatic complexes (M = Fe, Re, Os and Ir) are investigated using the density functional theory computations...
August 31, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28857250/morphology-of-the-thoracic-limb-of-goat-as-evidenced-by-gross-osteology-and-radiology
#3
M Makungu, B Merere
The objective of this study was to provide the detailed normal gross osteology and radiographic anatomy of the thoracic limb in goats as a reference for clinical use and in biomedical research. Radiography of the thoracic limb was performed in five small East African goats. Radiographic findings were correlated with bone specimens from four adult small East African goats. The scapula was narrow. The major tubercle was large and extended proximally above the head of the humerus. The lateral supracondylar crest was less prominent...
August 31, 2017: Anatomia, Histologia, Embryologia
https://www.readbyqxmd.com/read/28832196/salvage-of-failed-achilles-tendon-interposition-arthroplasty-for-druj-instability-after-ulnar-head-resection-with-aptis-prosthesis
#4
Sunishka M Wimalawansa, Rocio Rodriguez Lopez, Fernando Garcia de Lucas, Luc De Smet, Michael A Boin, Matthew Dorweiler, Ilse Degreef
BACKGROUND: Historically, failed conservative treatment for irreparably damaged distal radioulnar joints (DRUJs) is treated via distal ulnar resection or DRUJ fusion; complications include disabling painful convergence of the radius and ulnar stump during lifting Various treatments for radioulnar impingement include distal radioulnar Achilles tendon allograft interpositional arthroplasty. This technique does not adequately prevent radioulnar impingement and we explore an alternative treatment...
September 2017: Hand: Official Journal of the American Association for Hand Surgery
https://www.readbyqxmd.com/read/28819519/simultaneous-ipsilateral-fractures-of-distal-and-proximal-ends-of-the-radius
#5
Khalid Ibn El Kadi, Mounir Benabid, Sarr Saliou, Oussama El Assil, Amine Marzouki, Kamal Lahrach, Fawzi Boutayeb
We treated a patient with a rare combination of ipsilateral fractures of the distal and proximal ends of the radius. A man aged 42 years had simultaneous fractures of the distal and proximal ends of the radius (radial neck) following a roadside accident. The distal end fracture of the radius was treated with surgical reduction and T-plate volar fixation, and the undisplaced radial neck fracture was treated by an above elbow splintage for 2 weeks. The elbow mobilization was started at 2 weeks. The distal radius was protected for another 4 weeks in a below elbow functional brace...
2017: Pan African Medical Journal
https://www.readbyqxmd.com/read/28818139/bed-rest-and-intermittent-centrifugation-effects-on-human-balance-and-neuromotor-reflexes
#6
William H Paloski, Millard F Reschke, Alan H Feiveson
INTRODUCTION: The effects of repeated centrifugation in association with head-down tilt (HDT) bed rest (BR) on the mediation of basic reflexes associated with the major postural muscles was investigated as a potential countermeasure for maintaining balance control and neuromotor reflex function. METHODS: There were 15 male volunteers who were exposed to 21 d of 6° HDT-BR. Eight were treated with daily 1-h artificial gravity (AG) exposures aboard a short radius centrifuge that provided 1-g footward loading at heart level...
September 1, 2017: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/28815738/the-effect-of-depression-generalized-anxiety-and-selective-serotonin-reuptake-inhibitors-on-change-in-bone-metabolism-in-adolescents-and-emerging-adults
#7
Chadi A Calarge, James A Mills, Kathleen F Janz, Trudy L Burns, Janet A Schlechte, William H Coryell, Babette S Zemel
OBJECTIVES: To prospectively examine the independent contribution of major depressive disorder (MDD), generalized anxiety disorder (GAD), and selective serotonin reuptake inhibitors (SSRIs) use to changes in bone metabolism in older adolescents and emerging adults. METHODS: Medically-healthy 15 to 20 year-olds who were unmedicated or within one month of starting an SSRI were prospectively followed. Psychiatric functioning and medication treatment were assessed monthly...
August 16, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/28809637/-comparison-of-short-therm-results-of-conservative-versus-operative-treatment-of-distal-ulna-fractures-associated-with-distal-radius-fracture-treated-by-plate-osteosynthesis
#8
P Meluzinová, L Kopp, P Dráč, K Edelmann, P Obruba
PURPOSE OF THE STUDY The study aims to evaluate and compare the results of conservative and operative treatment of individual types of distal ulna fractures associated with distal radius fracture treated by plate osteosynthesis and to verify the conclusions of the other authors regarding the recommended therapeutic procedures in these fractures. MATERIAL AND METHODS In the period from 08/2013 to 09/2015, a total of 81 patients participated in the prospective randomised study, with the mean follow-up period of 24 months (6-36)...
2017: Acta Chirurgiae Orthopaedicae et Traumatologiae Cechoslovaca
https://www.readbyqxmd.com/read/28795485/relationship-between-ultrasound-muscle-thickness-and-mri-measured-muscle-cross-sectional-area-in-the-forearm-a-pilot-study
#9
Takashi Abe, Miyuki Nakatani, Jeremy P Loenneke
Previous studies have investigated the relationship between ultrasound-measured muscle thickness (MT) and individual muscle cross-sectional area (CSA); however, the forearm muscle had not yet been studied. The purpose of this study was to examine the relationship between forearm MT by ultrasound and the muscle CSA of the forearm obtained by magnetic resonance imaging (MRI). Ten young and middle-aged adults had both ultrasound and MRI measurements at 30% the distance from the styloid process of the ulna to the head of the radius...
August 9, 2017: Clinical Physiology and Functional Imaging
https://www.readbyqxmd.com/read/28774596/patterns-of-failure-guided-biological-target-volume-definition-for-head-and-neck-cancer-patients-fdg-pet-and-dosimetric-analysis-of-dose-escalation-candidate-subregions
#10
Abdallah S R Mohamed, Carlos E Cardenas, Adam S Garden, Musaddiq J Awan, Crosby D Rock, Sarah A Westergaard, G Brandon Gunn, Abdelaziz M Belal, Ahmed G El-Gowily, Stephen Y Lai, David I Rosenthal, Clifton D Fuller, Michalis Aristophanous
BACKGROUND: To identify the radio-resistant subvolumes in pretreatment FDG-PET by mapping the spatial location of the origin of tumor recurrence after IMRT for head-and-neck squamous cell cancer to the pretreatment FDG-PET/CT. METHODS: Patients with local/regional recurrence after IMRT with available FDG-PET/CT and post-failure CT were included. For each patient, both pre-therapy PET/CT and recurrence CT were co-registered with the planning CT (pCT). A 4-mm radius was added to the centroid of mapped recurrence growth target volumes (rGTV's) to create recurrence nidus-volumes (NVs)...
August 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/28774256/anatomical-variations-of-the-extensor-carpi-ulnaris-groove-a-new-computed-tomography-based-evaluation
#11
Sho Kohyama, Toshikazu Tanaka, Eriko Okano, Ochiai Naoyuki
BACKGROUND: This study aimed to develop a classification that precisely describes the extensor carpi ulnaris (ECU) groove morphology. METHODS: Reconstructed axial plane computed tomography scans of the wrists of 200 patients were reviewed. Three groups of groove shape were created based on the position of the deepest point: deviated to the ulnar side (Type U), in the middle of the groove (Type M), and deviated to the radial side (Type R). Groove depth, width, carrying angle, and radius of the curvature were measured using the Picture Archiving and Communication System in a slice in which the ulnar head was the largest...
September 2017: Journal of Hand Surgery Asian-Pacific Volume
https://www.readbyqxmd.com/read/28764711/video-tactile-pneumatic-sensor-for-soft-tissue-elastic-modulus-estimation
#12
M M Gubenko, A V Morozov, A N Lyubicheva, I G Goryacheva, M Z Dosaev, M-Sh Ju, Ch-H Yeh, F-Ch Su
BACKGROUND: A new sensor for estimating elasticity of soft tissues such as a liver was developed for minimally invasive surgery application. METHODS: By measuring deformation and adjusting internal pressure of the pneumatic sensor head, the sensor can be used to do palpation (indentation) of tissues with wide range of stiffness. A video camera installed within the sensor shell is used to register the radius of the contact area. Based on finite element model simulations and the measured data, elastic modulus of the indented soft tissue can be calculated...
August 1, 2017: Biomedical Engineering Online
https://www.readbyqxmd.com/read/28753234/manipulative-interventions-for-reducing-pulled-elbow-in-young-children
#13
REVIEW
Marjolein Krul, Johannes C van der Wouden, Emma J Kruithof, Lisette Wa van Suijlekom-Smit, Bart W Koes
BACKGROUND: Pulled elbow (nursemaid's elbow) is a common injury in young children. It often results from a sudden pull on the arm, usually by an adult or taller person, which pulls the radius through the annular ligament, resulting in subluxation (partial dislocation) of the radial head. It can also be caused by a fall or twist. The child experiences sudden acute pain and loss of function in the affected arm. Pulled elbow is usually treated by manual reduction of the subluxed radial head...
July 28, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28742972/stimuli-responsive-directional-vesicular-assembly-with-tunable-surface-functionality-and-impact-on-enzyme-inhibition
#14
Amrita Sikder, Debes Ray, Vinod K Aswal, Suhrit Ghosh
The article describes the self-assembly of a series of unsymmetrical bola-shaped π-amphiphiles (NDI-1, NDI-1a, NDI-2, NDI-3, and NDI-4) consisting of a hydrophobic naphthalene-diimide (NDI) chromophore attached to a nonionic hydrophilic wedge and an anionic headgroup in the two opposite arms of the central NDI. By design, only a single hydrazide group is linked either on the ionic or nonionic arm of the NDI. NDI-1 and NDI-1a are regioisomers differing only in the location of the hydrazide group, placed in the nonionic or ionic arm, respectively...
August 8, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28729396/acute-volume-loading-exacerbates-direct-ventricular-interaction-in-a-model-of-copd
#15
William Spencer Cheyne, Alexandra Mackenzie Williams, Megan I Harper, Neil Derek Eves
Volume loading increases left ventricular (LV) stroke volume (LVSV) through series interaction but may paradoxically reduce LVSV in the presence of large increases in right ventricular (RV) afterload due to direct ventricular interaction (DVI). RV afterload is often increased in COPD as a result of pathological changes to respiratory mechanics, namely increased negative intrathoracic pressure (nITP), dynamic lung hyperinflation (DH) and increased pulmonary vascular resistance (PVR). These hallmarks of COPD negatively impact LV hemodynamics in normovolemia...
July 20, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28706795/measurement-of-hip-contact-pressure-during-arthroscopic-femoroacetabular-impingement-surgery
#16
Mitsunori Kaya
Cam impingement is caused by jamming of an abnormal femoral head with an increased radius into the acetabulum during motion. Therefore, the elevation of the contact pressure during the motion is suspected to be an essential pathology of femoroacetabular impingement. However, there is no method to quantify the hip contact pressure during motion. The purpose of this Technical Note is to introduce a technique to measure the hip contact pressure during arthroscopic surgery. The author believes that the current technique will be a useful tool for the detailed investigation of the pathophysiology femoroacetabular impingement and thorough evaluation of its therapeutic significance...
June 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/28663399/prediction-of-the-pre-morbid-3d-anatomy-of-the-proximal-humerus-based-on-statistical-shape-modelling
#17
S Poltaretskyi, J Chaoui, M Mayya, C Hamitouche, M J Bercik, P Boileau, G Walch
AIMS: Restoring the pre-morbid anatomy of the proximal humerus is a goal of anatomical shoulder arthroplasty, but reliance is placed on the surgeon's experience and on anatomical estimations. The purpose of this study was to present a novel method, 'Statistical Shape Modelling', which accurately predicts the pre-morbid proximal humeral anatomy and calculates the 3D geometric parameters needed to restore normal anatomy in patients with severe degenerative osteoarthritis or a fracture of the proximal humerus...
July 2017: Bone & Joint Journal
https://www.readbyqxmd.com/read/28636369/dynamics-of-charged-species-in-ionic-neutral-block-copolymer-and-surfactant-complexes
#18
Jose M Borreguero, Philip A Pincus, Bobby G Sumpter, Monojoy Goswami
Structure-property relationships of ionic block copolymer (BCP) surfactant complexes are critical toward the progress of favorable engineering design of efficient charge-transport materials. In this article, molecular dynamics simulations are used to understand the dynamics of charged-neutral BCP and surfactant complexes. The dynamics are examined for two different systems: charged-neutral double-hydrophilic and hydrophobic-hydrophilic block copolymers with oppositely charged surfactant moieties. The dynamics of the surfactant head, tails, and charges are studied for five different BCP volume fractions...
July 6, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28634923/osteoblastoma-of-the-elbow-analysis-of-13-patients-and-literature-review
#19
Andrea Angelini, Andrès Felipe Varela-Osorio, Giulia Trovarelli, Antonio Berizzi, Gabriele Zanotti, Pietro Ruggieri
PURPOSE: To analyze the clinical and radiographic characteristics, treatment, and outcome of patients with elbow osteoblastoma. PATIENTS AND METHODS: We present 13 patients (7 males and 6 females; mean age, 28 years) diagnosed and treated for an elbow osteoblastoma from 1975 to 2012. Mean follow-up was 29 months (range 12-60 months). Clinical presentation, imaging, surgical treatment, complications, range of elbow motion, and functional outcome were evaluated...
August 2017: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
https://www.readbyqxmd.com/read/28603568/current-concepts-in-radial-club-hand
#20
Takehiko Takagi, Atsuhito Seki, Shinichiro Takayama, Masahiko Watanabe
Radial club hand is a complex congenital abnormality of the radial or pre-axial border of the upper extremity. It has a wide range of phenotypes from hypoplasia of the thumb to complete absence of the radius and the first ray. Centralization with tendon transfer is a popular method for maintaining the correct position of radial club hand. On the other hand, various corrections were devised, e.g. radialization after distraction to emphasize the fact that the head of the ulna is positioned under the radial carpal bones and is no longer placed in a slot in the center of the carpus, microvascular epiphysis transfer, gradual correction using Ilizarov method, for Bayne Type III or Type IV...
2017: Open Orthopaedics Journal
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