keyword
MENU ▼
Read by QxMD icon Read
search

Magnet

keyword
https://www.readbyqxmd.com/read/29778076/design-and-synthesis-of-core-shell-fe-3-o-4-ptmt-composite-magnetic-microspheres-for-adsorption-of-heavy-metals-from-high-salinity-wastewater
#1
Xin Huang, Jinyue Yang, Jingkang Wang, Jingtao Bi, Chuang Xie, Hongxun Hao
In this study, a novel magnetic nanoparticles (MNP) modified by an organodisulfide polymer (PTMT) was designed for adsorption of heavy metals (Hg(II), Pb(II) and Cd(II)) from simulated coal chemical high salinity wastewater. The MNP-PTMT nano-composite was synthesize and characterized by SEM, TEM, FTIR, BET, VSM, TGA and XRD. The results indicate that the wanted MNP-PTMT magnetic nanoparticles were successfully obtained by modification. Adsorption experiments were systematically carried out to evaluate the performance of the obtained nanoparticles and to build up the adsorption models...
May 10, 2018: Chemosphere
https://www.readbyqxmd.com/read/29778075/efficient-removal-of-dyes-from-aqueous-solutions-using-a-novel-hemoglobin-iron-oxide-composite
#2
Matthew Essandoh, Rafael A Garcia
Magnetic particles entrapped in different matrices that display high thermal stability, low toxicity, interactive functions at the surface, and high saturation magnetization are of great interest. The objective of this work was to synthesize a novel hemoglobin/iron oxide composite (Hb/Fe3 O4 ) for the removal of different dyes (indigo carmine, naphthol blue black, tartrazine, erythrosine, eriochrome black T and bromophenol blue) from aqueous solutions. The Hb/Fe3 O4 composite was characterized using scanning electron microscopy (SEM), laser diffraction particle size analysis, FT-IR spectroscopy, isoelectric point determination and thermogravimetric analysis (TGA)...
May 10, 2018: Chemosphere
https://www.readbyqxmd.com/read/29778072/nmr-at-pressures-up-to-90-gpa
#3
Thomas Meier, Saiana Khandarkhaeva, Sylvain Petitgirard, Thomas Körber, Alexander Lauerer, Ernst Rössler, Leonid Dubrovinsky
The past 15 years have seen an astonishing increase in Nuclear Magnetic Resonance (NMR) sensitivity and accessible pressure range in high-pressure NMR experiments, owing to a series of new developments of NMR spectroscopy applied to the diamond anvil cell (DAC). Recently, with the application of electro-magnetic lenses, so-called Lenz lenses, in toroidal diamond indenter cells, pressures of up to 72 GPa with NMR spin sensitivities of about 1012  spin/Hz1/2 has been achieved. Here, we describe the implementation of a refined NMR resonator structure using a pair of double stage Lenz lenses driven by a Helmholtz coil within a standard DAC, allowing to measure sample volumes as small as 100 pl prior to compression...
May 14, 2018: Journal of Magnetic Resonance
https://www.readbyqxmd.com/read/29778068/evaluation-of-the-structural-morphology-of-starch-graft-poly-acrylic-acid-on-its-scale-inhibition-efficiency
#4
Wei Yu, Yawen Wang, Aimin Li, Hu Yang
The development of phosphorus-free and biodegradable scale inhibitors has been paid considerable attention. Two series of starch-graft-poly(acrylic acid) (St-g-PAA) samples with different grafting ratios and grafted-chain distributions, that is, the number and length of grafted PAA chains on the starch backbone, were designed and prepared in this study. Fourier transform infrared and 1 H nuclear magnetic resonance spectra were used to further characterize the molecular structures of the St-g-PAAs. In addition to dose, the effects of the structural morphologies of St-g-PAA, namely, grafting ratio and grafted-chain distribution, on the scale-inhibition performance against calcium carbonate were investigated systematically...
April 9, 2018: Water Research
https://www.readbyqxmd.com/read/29778058/plasma-polymer-facilitated-magnetic-technology-for-removal-of-oils-from-contaminated-waters
#5
Satriyo Krido Wahono, Alex Cavallaro, Krasimir Vasilev, Agnieszka Mierczynska
Oil pollution of waters is one of the most serious environmental problems globally. The long half-life and persistence within the environment makes oil particularly toxic and difficult to remediate. There is a significant need for efficient and cost-effective oil recovery technologies to be brought in to practice. In this study, we developed a facile and efficient magnetic separation method. The surface of 316L stainless steel nanoparticles was modified by plasma deposition of 1,7-octadiene and perfluorooctane, producing relatively hydrophobic coatings having water contact angles of 86 and 100°, respectively...
May 16, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29778024/simultaneous-glucose-production-from-cellulose-and-fouling-reduction-using-a-magnetic-responsive-membrane-reactor-with-superparamagnetic-nanoparticles-carrying-cellulolytic-enzymes
#6
Abaynesh Yihdego Gebreyohannes, Madhav Dharmjeet, Tom Swusten, Matthias Mertens, Joran Verspreet, Thierry Verbiest, Christophe M Courtin, Ivo F J Vankelecom
This work aimed at investigating simultaneous hydrolysis of cellulose and in-situ foulant degradation in a cellulose fed superparamagnetic biocatalytic membrane reactor (BMRSP ). In this reactor, a dynamic layer of superparamagnetic bionanocomposites with immobilized cellulolytic enzymes were reversibly immobilized on superparamagnetic polymeric membrane using an external magnetic field. The formation of a dynamic layer of bionanocomposites on the membrane helped to prevent direct membrane-foulant interaction...
May 2, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/29778001/patchy-gold-coated-fe-3-o-4-nanospheres-with-enhanced-catalytic-activity-applied-for-paper-based-bipolar-electrode-electrochemiluminescence-aptasensors
#7
Xin Zhang, Ning Bao, Xiliang Luo, Shou-Nian Ding
In this work, novel multifunctional patchy gold coated Fe3 O4 hybrid nanoparticles (PG-Fe3 O4 NPs) have been successfully synthesized in aqueous medium via a facile adsorption-reduction method. A rational formation mechanism has been proposed by monitoring the morphological evolution. The PG-Fe3 O4 NPs retained the good magnetic property and exhibited excellent catalytical effeciency towards the electrochemical reduction of hydrogen peroxide. Chronoamperometric and amperometric experiments indicated a relatively high catalytic rate constant of 3...
May 10, 2018: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/29777885/posttraumatic-cerebrospinal-fluid-leak-associated-with-an-upper-cervical-meningeal-diverticulum
#8
Noriya Enomoto, Hideo Mure, Toshiyuki Okazaki, Mai Azumi, Shinya Okita, Shinji Nagahiro, Yasushi Takagi
Spontaneous intracranial hypotension (SIH) has been increasingly recognized as a phenomenon caused by cerebrospinal fluid (CSF) leaks; however, its pathogenesis is still unclear. Here, we report two cases of SIH as a result of CSF leak from a meningeal diverticulum at the C2 nerve root sleeve. The first case is that of a 46-year-old man who had suffered from orthostatic headache after a bicycle accident at age 45. Computed tomography (CT) myelography revealed CSF leaks at the C1/2 level. He underwent epidural blood patch (EBP) therapy, but it was unsuccessful...
May 16, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29777863/comparison-of-histological-and-morphometrical-changes-underlying-subchondral-bone-abnormalities-in-inflammatory-and-degenerative-musculoskeletal-disorders-a-systematic-review
#9
REVIEW
M Loef, S van Beest, F P B Kroon, J L Bloem, O M Dekkers, M Reijnierse, J W Schoones, M Kloppenburg
OBJECTIVE: Subchondral bone abnormalities (SBAs) on magnetic resonance imaging (MRI) are observed frequently and associated with disease course in various musculoskeletal disorders. This review aims to map the existing knowledge of their underlying histological features, and to identify needs for future research. DESIGN: We conducted a systematic review following PRISMA guidelines until September 2017, including all studies correlating histological features to on MRI defined SBAs in patients with osteoarthritis (OA), rheumatoid arthritis (RA), spondyloarthritis (SpA) and degenerative disc disease (DDD)...
May 16, 2018: Osteoarthritis and Cartilage
https://www.readbyqxmd.com/read/29777859/three-dimensional-model-of-the-female-perineum-and-pelvic-floor-muscles
#10
Géraldine Giraudet, Laurent Patrouix, Christian Fontaine, Xavier Demondion, Michel Cosson, Chrystèle Rubod
OBJECTIVE: The anatomy of the perineum and the pelvic diaphragm of woman is complex. A numerical complete three-dimensional (3D) model of every muscle of the woman pelvis doesn't exist. The pathophysiology of genital prolapse is still debated. Knowledge of anatomy is essential to better understand its mechanisms. The aim of this research was to build a complete three-dimensional model of the female perineum and pelvic floor muscles. STUDY DESIGN: To model the pelvic muscles we reconstructed them in three dimensions from tracing a magnetic resonance imaging (MRI) of a female pelvis from a cadaver...
May 16, 2018: European Journal of Obstetrics, Gynecology, and Reproductive Biology
https://www.readbyqxmd.com/read/29777846/an-academic-tertiary-referral-center-s-experience-with-a-vascular-surgery-based-uterine-artery-embolization-program
#11
Naiem Nassiri, Adrian Balica, Nolan C Cirillo-Penn, Dustin Tyler Crystal, Gloria A Bachmann
OBJECTIVE: Despite growing endovascular experience within the vascular surgery community, some catheter-based interventions - such as uterine artery embolization (UAE) - remain outside the clinical scope of most vascular surgeons, owing in part to established referral patterns and limited awareness among referring colleagues. We present our experience with a vascular surgery-based, multidisciplinary UAE program at an academic tertiary referral center. METHODS: In a collaborative effort between vascular surgery and gynecology, a Pelvic Vascular Disease Program has been established to provide palliative, prophylactic, and therapeutic embolizations including, but not limited to, UAE...
May 16, 2018: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/29777822/effects-of-global-signal-regression-and-subtraction-methods-on-resting-state-functional-connectivity-using-arterial-spin-labeling-data
#12
João Paulo Santos Silva, Luciana da Mata Mônaco, André Monteiro Paschoal, Ícaro Agenor Ferreira de Oliveira, Renata Ferranti Leoni
BACKGROUND: Arterial spin labeling (ASL) is an established magnetic resonance imaging (MRI) technique that is finding broader applications in functional studies of the healthy and diseased brain. To promote improvement in cerebral blood flow (CBF) signal specificity, many algorithms and imaging procedures, such as subtraction methods, were proposed to eliminate or, at least, minimize noise sources. Therefore, this study addressed the main considerations of how CBF functional connectivity (FC) is changed, regarding resting brain network (RBN) identification and correlations between regions of interest (ROI), by different subtraction methods and removal of residual motion artifacts and global signal fluctuations (RMAGSF)...
May 16, 2018: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/29777819/7-tesla-magnetic-resonance-imaging-of-caudal-anterior-cingulate-and-posterior-cingulate-cortex-atrophy-in-patients-with-trigeminal-neuralgia
#13
Hyeong Cheol Moon, Chan-A Park, Yeong-Jae Jeon, Soon Tae You, Hyun Man Baek, Youn Joo Lee, Chul Beom Cho, Chae Joon Cheong, Young Seok Park
The cingulate cortex (CC) is a brain region that plays a key role in pain processing, but CC abnormalities are not unclear in patients with trigeminal neuralgia (TN). The purpose of this study was to determine the central causal mechanisms of TN and the surrounding brain structure in healthy controls and patients with TN using 7 Tesla (T) magnetic resonance imaging (MRI). Whole-brain parcellation in gray matter volume and thickness was assessed in 15 patients with TN and 16 healthy controls matched for sex, age, and regional variability using T1-weighted imaging...
May 16, 2018: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/29777719/purification-and-identification-of-an-actinomycin-d-analogue-from-actinomycetes-associated-with-ganoderma-applanatum-via-magnetic-molecularly-imprinted-polymers-and-tandem-mass-spectrometry
#14
Chang-Gen Li, Bo Yuan, Meng-Meng Dong, Pin-Yu Zhou, Yu-Xin Hao, Ying-Ying Sun, Meng-Ke Xu, Dan Li, Guo-Yin Kai, Ji-Hong Jiang
Actinomycetes are main producers of antibiotics and targeted screening could improve the efficiency of discovering new drugs. This study describes, for the first time, the isolation of endophytic actinomycetes from the macrofungus Ganoderma applanatum. To increase the efficiency of screening, novel actinomycin D (Act D) molecularly-imprinted polymers were adsorbed to the surface of Fe3 O4 @SiO2 magnetic microspheres (MMIPs) and using in the isolation. A monolithic column prepared with magnetic molecularly imprinted polymers was employed to adsorb actinomycin D and its analogues for selective analysis and identification via MS/MS spectroscopy...
May 16, 2018: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/29777568/cost-efficient-magnetic-nanoporous-carbon-derived-from-citrus-peel-for-the-selective-adsorption-of-seven-insecticides
#15
Yuantao Zhou, Shurui Cao, Cunxian Xi, Jiuyan Chen, Lei Zhang, Xianliang Li, Guomin Wang, Zhiqiong Chen
A magnetic solid-phase extraction adsorbent that consisted of citrus peel-derived nanoporous carbon and silica-coated Fe3 O4 microspheres (C/SiO2 @Fe3 O4 ) was successfully fabricated by co-precipitation. As a modifier for magnetic microspheres, citrus peel-derived nanoporous carbon was not only economical and renewable for its raw material, but exerted enormous nanosized pore structure, which could directly influence the type of adsorbed analytes. The C/SiO2 @Fe3 O4 also possessed the advantages of Fe3 O4 microspheres like superparamagnetism, that could be easily separated magnetically after adsorption...
May 18, 2018: Journal of Separation Science
https://www.readbyqxmd.com/read/29777451/telemedicine-based-system-for-quality-management-and-peer-review-in-radiology
#16
Sergey Morozov, Ekaterina Guseva, Natalya Ledikhova, Anton Vladzymyrskyy, Dmitry Safronov
OBJECTIVES: Quality assurance is the key component of modern radiology. A telemedicine-based quality assurance system helps to overcome the "scoring" approach and makes the quality control more accessible and objective. METHODS: A concept for quality assurance in radiology is developed. Its realization is a set of strategies, actions, and tools. The latter is based on telemedicine-based peer review of 23,199 computed tomography (CT) and magnetic resonance imaging (MRI) images...
May 18, 2018: Insights Into Imaging
https://www.readbyqxmd.com/read/29777402/a-national-study-of-the-use-of-asymptomatic-systemic-imaging-for-surveillance-following-breast-cancer-treatment-aft-01
#17
Jessica R Schumacher, Heather B Neuman, George J Chang, Benjamin D Kozower, Stephen B Edge, Menggang Yu, David J Vanness, Yajuan Si, Elizabeth A Jacobs, Amanda B Francescatti, Patricia A Spears, Jeffrey Havlena, Taiwo Adesoye, Daniel McKellar, David Winchester, Elizabeth S Burnside, Caprice C Greenberg
BACKGROUND: Although not guideline recommended, studies suggest 50% of locoregional breast cancer patients undergo systemic imaging during follow-up, prompting its inclusion as a Choosing Wisely measure of potential overuse. Most studies rely on administrative data that cannot delineate scan intent (prompted by signs/symptoms vs. asymptomatic surveillance). This is a critical gap as intent is the only way to distinguish overuse from appropriate care. OBJECTIVE: Our aim was to assess surveillance systemic imaging post-breast cancer treatment in a national sample accounting for scan intent...
May 17, 2018: Annals of Surgical Oncology
https://www.readbyqxmd.com/read/29777389/iron-based-metal-organic-frameworks-as-a-theranostic-carrier-for-local-tuberculosis-therapy
#18
Gabriela Wyszogrodzka, Przemysław Dorożyński, Barbara Gil, Wieslaw J Roth, Maciej Strzempek, Bartosz Marszałek, Władysław P Węglarz, Elżbieta Menaszek, Weronika Strzempek, Piotr Kulinowski
PURPOSE: The purpose of the study was initial evaluation of applicability of metal organic framework (MOF) Fe-MIL-101-NH2 as a theranostic carrier of antituberculous drug in terms of its functionality, i.e. drug loading, drug dissolution, magnetic resonance imaging (MRI) contrast and cytotoxic safety. METHODS: Fe-MIL-101-NH2 was characterized using X-ray powder diffraction, FTIR spectrometry and scanning electron microscopy. The particle size analysis was determined using laser diffraction...
May 18, 2018: Pharmaceutical Research
https://www.readbyqxmd.com/read/29777360/crossed-aphasia-following-cerebral-infarction-in-a-right-handed-patient-with-atypical-cerebral-language-dominance
#19
Xiaoping Tan, Yang Guo, Saihong Dun, Hongzan Sun
OBJECTIVE: Crossed aphasia (CA), usually referred to as an acquired language disturbance, is caused by a lesion in the cerebral hemisphere ipsilateral to the dominant hand, and the exact mechanism is not clear. The development of handedness is influenced by education and training and the impact of habitualization, while language is more susceptible to the impact of speech habits, and it is not absolutely accurate to judge cerebral language dominance by the degree of hand preference. METHODS: We describe a case of CA after right hemispheric stroke in a right-handed patient with atypical language dominance and attempt to analyze the mechanism of CA based on functional imaging methods, including arterial spin labeling (ASL) and positron emission tomography/magnetic resonance imaging (PET-MRI)...
May 18, 2018: Journal of Neurology
https://www.readbyqxmd.com/read/29777345/placenta-accreta-and-balloon-catheterization-the-experience-of-a-single-center-and-an-update-of-latest-evidence-of-literature
#20
Ferdinando Antonio Gulino, F Di Guardo, E Zambrotta, L M Di Gregorio, Andrea Miranda, Stella Capriglione, M A Palumbo
PURPOSE: We studied the efficacy of using pre-cesarean delivery (CD) temporary occlusion of internal iliac arteries with balloon catheters in case of placenta previa-accreta in terms of maternal and neonatal outcomes and to test accuracy of ultrasound (US) and magnetic resonance imaging (MRI) for prenatal diagnosis. METHODS: From March 2014 to January 2018, women with an US and/or MRI diagnosis of placenta previa-accreta and a planned delivery were enrolled and divided into two groups: balloon catheterization group (women treated with preoperative catheters and CD) and control group (women candidates to elective CD)...
May 18, 2018: Archives of Gynecology and Obstetrics
keyword
keyword
45238
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"