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https://www.readbyqxmd.com/read/29642476/tailoring-of-perpendicular-magnetic-anisotropy-in-dy-13-fe-87-thin-films-with-hexagonal-antidot-lattice-nanostructure
#1
Mohamed Salaheldeen, Victor Vega, Angel Ibabe, Miriam Jaafar, Agustina Asenjo, Agustin Fernandez, Victor M Prida
In this article, the magnetic properties of hexagonally ordered antidot arrays made of Dy13 Fe87 alloy are studied and compared with corresponding ones of continuous thin films with the same compositions and thicknesses, varying between 20 nm and 50 nm. Both samples, the continuous thin films and antidot arrays, were prepared by high vacuum e-beam evaporation of the alloy on the top-surface of glass and hexagonally self-ordered nanoporous alumina templates, which serve as substrates, respectively. By using a highly sensitive magneto-optical Kerr effect (MOKE) and vibrating sample magnetometer (VSM) measurements an interesting phenomenon has been observed, consisting in the easy magnetization axis transfer from a purely in-plane (INP) magnetic anisotropy to out-of-plane (OOP) magnetization...
April 8, 2018: Nanomaterials
https://www.readbyqxmd.com/read/29625093/is-going-beyond-rasch-analysis-necessary-to-assess-the-construct-validity-of-a-motor-function-scale
#2
Tiffanie Guillot, Sylvain Roche, Pascal Rippert, Dalil Hamroun, Jean Iwaz, René Ecochard, Carole Vuillerot
OBJECTIVE: Examine whether a Rasch analysis is sufficient to establish the construct validity of the Motor Function Measure (MFM) and discuss whether weighting the MFM item scores would improve the MFM construct validity. DESIGN: Observational cross-sectional multicenter study. SETTING: 23 physical medicine departments, neurology departments, or reference centers for neuromuscular diseases PARTICIPANTS: 911 patients (aged 6 to 60 years) with Charcot-Marie-Tooth disease (CMT), facio-scapulo-humeral dystrophy (FSHD), or myotonic dystrophy type 1 (DM1) INTERVENTIONS: None...
April 3, 2018: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/29602471/early-and-midterm-outcome-of-multilayer-flow-modulator-stent-for-complex-aortic-aneurysm-treatment-in-germany
#3
Walid Ibrahim, Konstantinos Spanos, Andreas Gussmann, Christoph A Nienaber, Joerg Tessarek, Heinrich Walter, Jörg Thalwitzer, Sebastian E Debus, Nikolaos Tsilimparis, Tilo Kölbel
OBJECTIVE: The objective of this study was to assess the early and midterm outcomes of endovascular repair of complex aortic aneurysm cases using the Multilayer Flow Modulator (MFM; Cardiatis, Isnes, Belgium) endograft in Germany. METHODS: A retrospective study including patients presenting with abdominal aortic aneurysm (AAA), thoracic aortic aneurysm, or thoracoabdominal aortic aneurysm treated with the MFM was conducted in Germany. Mortality and morbidity (in terms of spinal cord ischemia, visceral ischemia, and stroke) at 30 days postoperatively were evaluated...
March 27, 2018: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/29587185/pregnancy-outcomes-among-women-with-epilepsy-a-retrospective-cohort-study
#4
Atiwat Soontornpun, Tararak Choovanichvong, Theera Tongsong
OBJECTIVE: The objective of this study was to compare adverse pregnancy outcomes between pregnancies that involve epilepsy and those that do not and are identified as normal for the purposes of this paper. METHODS: A retrospective cohort study was carried out by accessing the maternal-fetal medicine (MFM) database to identify and review records of singleton pregnancies with epilepsy but with no other underlying disease (study group). A parallel group of low-risk pregnancies was randomly allocated as the control group...
March 24, 2018: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/29572514/magnetic-domain-interactions-of-fe-3-o-4-nanoparticles-embedded-in-a-sio-2-matrix
#5
J A Fuentes-García, A I Diaz-Cano, A Guillen-Cervantes, J Santoyo-Salazar
Currently, superparamagnetic functionalized systems of magnetite (Fe3 O4 ) nanoparticles (NPs) are promising options for applications in hyperthermia therapy, drug delivery and diagnosis. Fe3 O4 NPs below 20 nm have stable single domains (SSD), which can be oriented by magnetic field application. Dispersion of Fe3 O4 NPs in silicon dioxide (SiO2 ) matrix allows local SSD response with uniaxial anisotropy and orientation to easy axis, 90° <001> or 180° <111>. A successful, easy methodology to produce Fe3 O4 NPs (6-17 nm) has been used with the Stöber modification...
March 23, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29548042/maternal-fetal-medicine-workforce-survey-are-we-ready-for-regionalized-levels-of-maternal-care
#6
Katharine D Wenstrom, Mary E D'Alton, Daniel F O'Keefe
OBJECTIVE:  To conduct a survey of the members of the Society for Maternal-Fetal Medicine (SMFM) to determine the practice patterns of maternal-fetal medicine (MFM) subspecialists in the United States and to estimate the likelihood that our work force is sufficient to support the proposed MFM staffing requirements for level III and IV maternity centers. STUDY DESIGN:  All regular SMFM members in the United States were invited to answer a 26 question survey by email...
March 16, 2018: American Journal of Perinatology
https://www.readbyqxmd.com/read/29531389/individually-grown-cobalt-nanowires-as-magnetic-force-microscopy-probes
#7
Shuaa Alotaibi, Joshua Samba, Sabin Pokharel, Yucheng Lan, Kelechi Uradu, Ayodeji Afolabi, Ilyas Unlu, Gobind Basnet, Kadir Aslan, Bret N Flanders, Abdellah Lisfi, Birol Ozturk
AC electric fields were utilized in the growth of individual high-aspect ratio cobalt nanowires from simple salt solutions using the Directed Electrochemical Nanowire Assembly method. Nanowire diameters were tuned from the submicron scale to 40 nm by adjusting the AC voltage frequency and the growth solution concentration. The structural properties of the nanowires, including shape and crystallinity, were identified using electron microscopy. Hysteresis loops obtained along different directions of an individual nanowire using vibrating sample magnetometry showed that the magnetocrystalline anisotropy energy has the same order of magnitude as the shape anisotropy energy...
February 26, 2018: Applied Physics Letters
https://www.readbyqxmd.com/read/29530675/the-conscience-of-an-mfm
#8
Steven J Ralston
No abstract text is available yet for this article.
March 9, 2018: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/29493671/locating-the-binding-domains-in-a-highly-selective-mixed-matrix-membrane-via-synchrotron-ir-microspectroscopy
#9
Nicholas M Jacques, Peter R E Rought, Detlev Fritsch, Mathew Savage, Harry G W Godfrey, Lei Li, Tamoghna Mitra, Mark D Frogley, Gianfelice Cinque, Sihai Yang, Martin Schröder
The binding domains within a mixed matrix membrane (MMM) that is selective for CO2 comprising MFM-300(Al) and the polymer 6FDA-Durene-DABA have been established via in situ synchrotron IR microspectroscopy. The MOF crystals are fully accessible and play a critical role in the binding of CO2 , creating a selective pathway to promote permeation of CO2 within and through the MMM. This study reveals directly the molecular mechanism for the overall enhanced performance of this MMM in terms of permeability, solubility and selectivity for CO2 ...
March 1, 2018: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/29476055/sub-cellular-in-situ-characterization-of-ferritin-iron-in-a-rodent-model-of-spinal-cord-injury
#10
A R Blissett, B Deng, P Wei, K J Walsh, B Ollander, J Sifford, A D Sauerbeck, D W McComb, D M McTigue, G Agarwal
Iron (Fe) is an essential metal involved in a wide spectrum of physiological functions. Sub-cellular characterization of the size, composition, and distribution of ferritin(iron) can provide valuable information on iron storage and transport in health and disease. In this study we employ magnetic force microscopy (MFM), transmission electron microscopy (TEM), and electron energy loss spectroscopy (EELS) to characterize differences in ferritin(iron) distribution and composition across injured and non-injured tissues by employing a rodent model of spinal cord injury (SCI)...
February 23, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29469056/stress-induced-magnetic-domain-evolution-in-magnetoelectric-composites
#11
Harsh Trivedi, Vladimir Shvartsman, Marco S A Medeiros, Rob Pullar, Doru Lupascu
Local observation of the stress mediated magnetoelectric (ME) effect in composites has gained a great deal of interest over the last decades. However, there is an apparent lack of rigorous methods for a quantitative characterization of the ME effect at the local scale, especially in polycrystalline microstructures. In the present work, we address this issue by locally probing surface magnetic state of barium titante - hexagonal barium ferrite (BaTiO&lt;sub&gt;3&lt;/sub&gt; - BaFe&lt;sub&gt;12&lt;/sub&gt;O&lt;sub&gt;19&lt;/sub&gt;) ceramic composites using Magnetic Force Microscopy (MFM)...
February 22, 2018: Nanotechnology
https://www.readbyqxmd.com/read/29463390/managing-congenital-heart-disease-in-the-obstetric-patient
#12
REVIEW
Heidi M Connolly
OBJECTIVE: Cardiovascular disease is the major cause of pregnancy-related maternal mortality in the United States, and congenital heart disease (CHD) is the most common form of structural heart disease affecting women of childbearing age. Most females born with CHD will reach childbearing age and consider pregnancy. Adult CHD and maternal-fetal medicine (MFM) specialists managing women with CHD should provide preconception counseling, cardiovascular risk assessment prior to pregnancy that estimates maternal and fetal risk, management during pregnancy, and in the peripartum period and also know the potential complications and special circumstances that may occur in the post-partum period...
February 2018: Seminars in Perinatology
https://www.readbyqxmd.com/read/29455594/vaginal-birth-after-a-cesarean-delivery-for-arrest-of-descent
#13
Nathan S Fox, Amalia G Namath, Munira Ali, Mariam Naqvi, Simi Gupta, Andrei Rebarber
OBJECTIVE: To determine vaginal birth after cesarean (VBAC) success rates for patients with a prior cesarean delivery (CD) for arrest of descent, as well as determine any predictors for success. STUDY DESIGN: This was a retrospective cohort study of all patients delivered by a single MFM practice from 2005-2017 with a singleton pregnancy and one prior CD for arrest of descent. We estimated the rate and associated risk factors for successful VBAC. RESULTS: We included 208 patients with one prior CD for arrest of descent, 100 (48...
February 18, 2018: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/29442873/magnetic-properties-of-nano-maghemites-with-different-crystal-shapes
#14
Yen-Hua Chen, Jia-Fang Zhang
The differences between the macroscopic and microscopic magnetic properties of granular, rod, and tubular nano-maghemites were studied. The macroscopic magnetic properties of the different nano-maghemites were all ferrimagnetic by using a superconducting quantum interference device (SQUID). However, the coercive magnetic field and magnetization per unit volume were both in the orders of grain > tube > rod, which indicated that the crystal shape influenced macroscopic magnetic properties. A magnetic force microscope (MFM) was used to observe the microscopic magnetic structures; the samples were all magnetic in multiple domains, but the form and distribution of these domains were different...
May 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29394049/unusual-and-tunable-negative-linear-compressibility-in-the-metal-organic-framework-mfm-133-m-m-zr-hf
#15
Yong Yan, Alice E O'Connor, Gopikkaa Kanthasamy, George Atkinson, David R Allan, Alexander J Blake, Martin Schröder
High pressure single-crystal X-ray structural analyses of isostructural MFM-133(M) (M = Zr, Hf) of flu topology and incorporating the tetracarboxylate ligand TCHB4- [H4TCHB = 3,3',5,5'-tetrakis(4-carboxyphenyl)-2,2',4,4',6,6'-hexamethyl-1,1'-biphenyl] and {M6(µ-OH)8(OH)8(COO)8} clusters, confirm negative linear compressibility (NLC) behavior along the c axis. This occurs via a three-dimensional wine-rack NLC mechanism leading to distortion of the octahedral cage towards a more elongated polyhedron under static compression...
February 2, 2018: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29361931/obstetrical-provider-knowledge-and-attitudes-towards-cell-free-dna-screening-results-of-a-cross-sectional-national-survey
#16
Wilson V Chan, Jo-Ann Johnson, R Douglas Wilson, Amy Metcalfe
BACKGROUND: Cell-free DNA (cfDNA) screening has recently acquired tremendous attention, promising patients and healthcare providers a more accurate prenatal screen for aneuploidy than other current screening modalities. It is unclear how much knowledge regarding cfDNA screening obstetrical providers possess which has important implications for the quality and content of the informed consent patients receive. METHODS: A survey was designed to assess obstetrical provider knowledge and attitudes towards cfDNA screening and distributed online through the Society of Obstetricians & Gynecologists of Canada (SOGC)...
January 23, 2018: BMC Pregnancy and Childbirth
https://www.readbyqxmd.com/read/29338979/dysregulated-autophagy-in-restrictive-cardiomyopathy-due-to-pro209leu-mutation-in-bag3
#17
A Schänzer, S Rupp, S Gräf, D Zengeler, C Jux, H Akintürk, L Gulatz, N Mazhari, T Acker, R Van Coster, B K Garvalov, A Hahn
Myofibrillary myopathies (MFM) are hereditary myopathies histologically characterized by degeneration of myofibrils and aggregation of proteins in striated muscle. Cardiomyopathy is common in MFM but the pathophysiological mechanisms are not well understood. The BAG3-Pro209Leu mutation is associated with early onset MFM and severe restrictive cardiomyopathy (RCM), often necessitating heart transplantation during childhood. We report on a young male patient with a BAG3-Pro209Leu mutation who underwent heart transplantation at eight years of age...
March 2018: Molecular Genetics and Metabolism
https://www.readbyqxmd.com/read/29306245/turkish-version-of-the-motor-function-measure-scale-mfm-32-forneuromuscular-diseases-a-cross-cultural-adaptation-reliability-and-validity-study
#18
Habibe Serap İnal, Ela Tarakçı, Devrim Tarakçı, Gülcan Aksoy, Sezan Mergen Kılıç, Hakan Beşer, Çiğdem Beşer, Arzu Razak Özdinçler, Hacer Durmuş Tekçe, Fatma Yeşim Parman, Feza Deymeer, Zehra Piraye Oflazer
Background/aim: The Motor Function Measure (MFM-32) is a classification system for ambulant and nonambulant patients with neuromuscular diseases (NMDs). We aimed to translate it into Turkish, culturally adapt it, and test its reliability and validity for Turkish patients with NMDs.Materials and methods: The translation of the 32 items assessing three functional areas: standing position and transfers (D1: 13), axial/proximal (D2: 12), and distal (D3: 7) motor functions was performed according to the established guidelines for cross-cultural adaptation...
December 19, 2017: Turkish Journal of Medical Sciences
https://www.readbyqxmd.com/read/29175250/smfm-special-report-putting-the-m-back-in-mfm-addressing-education-about-disparities-in-maternal-outcomes-and-care
#19
Leslie Moroz, Laura E Riley, Mary D'Alton, Haywood L Brown, Anne R Davis, Michael Foley, Cornelia R Graves, Jeanne S Sheffield, Matthew L Zerden, Allison S Bryant
At the 36th Annual meeting of the Society for Maternal-Fetal Medicine (SMFM), leaders in the field of maternal-fetal medicine (MFM) convened to address maternal outcome and care inequities from 3 perspectives: (1) education, (2) clinical care, and (3) research. Meeting attendees identified knowledge gaps regarding disparities within the provider community; reviewed possible frameworks to address these knowledge gaps; and identified models with which to address key clinical issues. Collaboration and communication between all stakeholders will be needed to gain a better understanding of these prevailing disparities and formulate strategies to eliminate them...
February 2018: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/29139570/distribution-of-segmental-foot-kinematics-in-patients-with-degenerative-joint-disease-of-the-ankle
#20
Karl Canseco, Karen M Kruger, Jessica M Fritz, Katherine A Konop, Sergey Tarima, Richard M Marks, Gerald F Harris
Degenerative joint disease (DJD) of the ankle is a debilitating chronic disease associated with severe pain and dysfunction resulting in antalgic gait alteration. Little information is available about segmental foot and ankle motion distribution during gait in ankle osteoarthritis. The aim of the current study was to dynamically characterize segmental foot and ankle kinematics of patients with severe ankle arthrosis requiring total ankle replacement. This was a prospective study involving 36 (19 M, 17 F) adult patients with a clinical diagnosis of ankle arthrosis ("DJD" group) and 36 (23 M, 13 F) healthy subjects ("Control" group)...
November 15, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
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