816,575 results match your criteria Magnetic Resonance Materials in Physics Biology and Medicine[Journal]


Repeat Surgery for Patients Operated in Childhood for Early-Onset Esotropia and Suffering from Persistent Residual, Recurrent or Consecutive Strabismus.

Klin Monbl Augenheilkd 2019 Apr 18;236(4):446-450. Epub 2019 Apr 18.

Pediatric Ophthalmology, Vision Rive Droite, Le Grand Saconnex, Switzerland.

Background: Patients operated in childhood for early esotropia may suffer from persistent strabismus, whether residual, recurrent, or consecutive, usually with a more complex oculomotor imbalance than in primitive strabismus.

History And Signs: The clinical data are fundamental, in particular, (1) the basic accommodation-free deviation, (2) the horizontal far/near incomitance, (3) the cyclovertical incomitances and/or A or V pattern, and (4) the motility restrictions. In complicated cases, magnetic resonance tomography of the orbits showed the anomalies of the eye and muscle position. Read More

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http://dx.doi.org/10.1055/a-0859-6974DOI Listing

Encephalopathy in neonates with subgaleal hemorrhage is a key predictor of outcome.

Pediatr Res 2019 Apr 18. Epub 2019 Apr 18.

Department of Pediatric Newborn Medicine, Brigham and Women's Hospital, Boston, MA, USA.

Objective: Subgaleal hemorrhage (SGH) is reported to be associated with severe hemodynamic instability, coagulopathy, and even mortality. The importance of the presence or absence of neonatal encephalopathy in predicting SGH outcomes has not been explored. The aim of this study was to determine the relationship of clinical encephalopathy to short-term outcomes in neonates with SGH. Read More

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http://www.nature.com/articles/s41390-019-0400-1
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http://dx.doi.org/10.1038/s41390-019-0400-1DOI Listing
April 2019
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Behavioral and Biochemical Features of the Course and Surgical Treatment of Experimental Obstructive Hydrocephalus in Young Rats.

Dev Neurosci 2019 Apr 18:1-10. Epub 2019 Apr 18.

Division of Pediatric Neurosurgery, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil.

Introduction: Hydrocephalus is a multifactorial disease, affecting the dynamics of cerebrospinal fluid (CSF) and leading to severe neurological impairment in children; in spite of the recent advances in hydrocephalus research, it has many physiopathological aspects that still remain poorly understood, especially after treatment.

Objectives: To analyze the clinical, radiological, histopathological, and biochemical aspects of kaolin-induced hydrocephalus in an experimental model, both in the acute phase and after shunt treatment, by means of behavioral tests, magnetic resonance imaging (MRI) scans, histopathological studies, and level of inflammatory interleukins in the CSF.

Methods: Seven-day-old Wistar rats were used and subdivided into three subgroups: treated hydrocephalic (n = 24), untreated hydrocephalic (n = 17), and controls (n = 5). Read More

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http://dx.doi.org/10.1159/000497433DOI Listing

Functional Connectivity and Metabolic Alterations in Medial Prefrontal Cortex in a Rat Model of Fetal Alcohol Spectrum Disorder: A Resting-State Functional Magnetic Resonance Imaging and in vivo Proton Magnetic Resonance Spectroscopy Study.

Dev Neurosci 2019 Apr 18:1-12. Epub 2019 Apr 18.

Department of Pediatrics, University of Maryland School of Medicine, Baltimore, Maryland, USA,

Prenatal ethanol exposure alters brain structure, functional connectivity, and behavior in humans and rats. Behavioral changes include deficits in executive function, which requires cooperative activity between the frontal cortices and other brain regions. In this study, we analyzed the functional connectivity and neurochemical levels of the prefrontal cortex (PFC) using resting-state functional magnetic resonance imaging (rsfMRI) and proton magnetic resonance spectroscopy (1H-MRS) in ethanol-exposed (Eth) and control (Ctr) rats. Read More

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http://dx.doi.org/10.1159/000499183DOI Listing

Influence of Gamma-Hydroxybutyric Acid-Use and Gamma-Hydroxybutyric Acid-Induced Coma on Affect and the Affective Network.

Eur Addict Res 2019 Apr 18:1-9. Epub 2019 Apr 18.

Department of Psychiatry, Amsterdam Neuroscience, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands.

Background: Gamma-hydroxybutyric acid (GHB) is a drug of abuse associated with increased emergency room attendances, due to GHB-induced comas. Withdrawal from GHB often increases social anxiety and is linked to alterations in emotion processing. However, little is known about the effects of GHB-use and GHB-induced comas on affect regulation in humans. Read More

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http://dx.doi.org/10.1159/000497381DOI Listing

Correlation effect on the electronic properties of pair-checkerboard AFM monolayer FeSe: a first-principles study.

J Phys Condens Matter 2019 Apr 18. Epub 2019 Apr 18.

Xiangtan University, Xiangtan, Hunan, CHINA.

We presented a study of the influence of on-site Coulomb correlation U and Hund coupling J on the electronic properties of monolayer FeSe in a pair-checkerboard antiferromagnetic (PAFM) state based on Hubbard-corrected density functional theory (DFT+U). The results demonstrated the Hubbard-U have a strong influence on the electronic bands and lattice structure of monolayer FeSe in PAFM state. The in-plane lattice constant changes under U>1. Read More

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http://dx.doi.org/10.1088/1361-648X/ab1afbDOI Listing

Intraoperative ultrasonography (ioUS) characteristics of focal cortical dysplasia (FCD) type II b.

Seizure 2019 Mar 12;69:80-86. Epub 2019 Mar 12.

Department of Neurosurgery, Fondazione IRCCS Istituto Neurologico C. Besta, Milan, Italy; Department of Neurological Surgery, Johns Hopkins Medical School, Baltimore, MD, USA.

Purpose: Focal cortical dysplasia (FCD) is one of the major causes of drug-resistant epilepsy. Surgery has proved to be the treatment of choice, however up to a third of patients experience only partial resection. Ill-defined borders and lesions embedded in eloquent areas are two of the main drawbacks of FCD surgery. Read More

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http://dx.doi.org/10.1016/j.seizure.2019.02.020DOI Listing

Refining memory assessment of elderly people with cognitive impairment: Insights from the short-term memory binding test.

Arch Gerontol Geriatr 2019 Apr 1;83:114-120. Epub 2019 Apr 1.

Department of Basic Psychology II (Cognitive Processes), Faculty of Psychology, Complutense University of Madrid, Spain.

Alzheimer's disease (AD) affects temporary memory for bound features more remarkably than for individual features. Such selective impairments manifest from presymptomatic through dementia stages via titration procedures. A recent study suggested that without titration and with high memory load the binding selectivity may disappear in people at risk of AD such as those with Mild Cognitive Impairment (MCI). Read More

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https://linkinghub.elsevier.com/retrieve/pii/S01674943193008
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http://dx.doi.org/10.1016/j.archger.2019.03.025DOI Listing
April 2019
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Quantification of drugs encapsulated in liposomes by H NMR.

Colloids Surf B Biointerfaces 2019 Mar 31;179:414-420. Epub 2019 Mar 31.

Centre of Biological Engineering, University of Minho, Braga, Portugal. Electronic address:

Liposomes are one of the most important and extensively studied drug delivery system due to their ability to encapsulate different kinds of drugs. Exploiting the advantages of H Nuclear Magnetic Resonance (NMR) spectrometry, we established a rapid and easy method for quantification of drugs encapsulated in liposomes. An internal standard, pyridine, was used for quantitative determination of drug concentration. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S09277765193018
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http://dx.doi.org/10.1016/j.colsurfb.2019.03.039DOI Listing
March 2019
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Fatty acid binding protein 4 (FABP4) as a potential biomarker reflecting myocardial lipid storage in type 2 diabetes.

Metabolism 2019 Apr 15. Epub 2019 Apr 15.

Vascular Medicine and Metabolism Unit, Research Unit on Lipids and Atherosclerosis, "Sant Joan" University Hospital, Universitat Rovira i Virgili, Institut de Investigació Sanitaria Pere Virgili (IISPV), Reus, Spain; Spanish Biomedical Research Centre in Diabetes and Associated Metabolic Disorders (CIBERDEM), Institute of Health Carlos III, Madrid, Spain. Electronic address:

Objective: Fatty acid binding protein 4 (FABP4) is an intracellular lipid chaperone involved in the crosstalk between adipose and peripheral tissues, and it contributes to widespread insulin resistance in cells, including cardiac cells. However, the role of this adipokine in regulating cardiac metabolism and myocardial neutral lipid content in patients with type 2 diabetes has not been elucidated.

Methods: The impact of circulating FABP4 on the cardiac neutral lipid content were measured by proton magnetic resonance spectroscopy (H-MRS) in patients with type 2 diabetes. Read More

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http://dx.doi.org/10.1016/j.metabol.2019.04.007DOI Listing

Development of a Bead-based Immunoassay Using Virus-like Particles for Detection of Alphaviral Humoral Response.

J Virol Methods 2019 Apr 15. Epub 2019 Apr 15.

Diagnostics Systems Division, United States Army Medical Research Institute of Infectious Diseases, Fort Detrick, Maryland, USA. Electronic address:

There is a pressing need for sustainable and sensitive immunodiagnostics for use in public health efforts to understand and combat the threat of endemic and emerging infectious diseases. In this proof-of-concept work, we describe an immunodiagnostic approach based on the utilization of virus-like particles (VLPs) in a magnetic bead-based platform for multiplexed detection of antiviral humoral response. A retroviral-based VLP, that presents Venezuelan equine encephalitis virus E1/E2 glycoprotein antigen on its surface, was synthesized and coupled to magnetic beads to create VLP-conjugated microspheres (VCMs). Read More

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http://dx.doi.org/10.1016/j.jviromet.2019.04.013DOI Listing

Impaired dynamic cerebral autoregulation in patients with cerebral amyloid angiopathy.

Brain Res 2019 Apr 15. Epub 2019 Apr 15.

Department of Neuroradiology, University Medical Center Freiburg, Germany.

Cerebral amyloid angiopathy (CAA) might disturb the sensitive mechanism of cerebral pressure autoregulation. This study examines whether dynamic cerebral autoregulation (CA) is impaired in the posterior or anterior circulation of CAA patients. Fifteen patients with known CAA on magnetic resonance imaging (MRI) and 14 age-matched controls were examined with transcranial Doppler. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S00068993193020
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http://dx.doi.org/10.1016/j.brainres.2019.04.014DOI Listing
April 2019
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Stability of Endolymphatic Hydrops in Ménière Disease Shown by 3-Tesla Magnetic Resonance Imaging During and After Vertigo Attacks.

JAMA Otolaryngol Head Neck Surg 2019 Apr 18. Epub 2019 Apr 18.

Department of Otolaryngology, University of Tokushima School of Medicine, Tokushima, Japan.

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http://dx.doi.org/10.1001/jamaoto.2019.0435DOI Listing

What is the effect of a Mediterranean compared with a Fast Food meal on the exercise induced adipokine changes? A randomized cross-over clinical trial.

PLoS One 2019 18;14(4):e0215475. Epub 2019 Apr 18.

Basic and Clinical Immunology, Department of Pathology, Faculty of Medicine, University of Porto, Porto, Portugal.

Background: Adipose tissue-derived adipokines are pro-inflammatory cytokines involved in metabolic-related diseases and can be influenced by diet and exercise. We aimed to compare the effect of a Mediterranean (MdM) compared with Fast Food (FFM) meal on the exercise induced adipokines changes.

Methods: In a double blinded cross over trial, 46 participants were randomly assigned to one of two standardized iso-energy pre-exercise meals: FFM or MdM-type. Read More

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http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0215475PLOS

A structural analog of ralfuranones and flavipesins promotes biofilm formation by Vibrio cholerae.

PLoS One 2019 18;14(4):e0215273. Epub 2019 Apr 18.

Department of Chemical Engineering, Howard University, Washington, District of Columbia, United States of America.

Phosphoenolpyruvate-carbohydrate phosphotransferase system (PTS) is a highly conserved, multistep chemical process which uses phosphate transfer to regulate the intake and use of sugars and other carbohydrates by bacteria. In addition to controlling sugar uptake, the PTS regulates several bacterial cellular functions such as chemotaxis, glycogen metabolism, catabolite repression and biofilm formation. Previous studies have shown that the phosphoenolpyruvate (PEP) to pyruvate ratio is a critical determinant of PTS functions. Read More

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http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0215273PLOS
April 2019
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Artificial intelligence and the analysis of multi-platform metabolomics data for the detection of intrauterine growth restriction.

PLoS One 2019 18;14(4):e0214121. Epub 2019 Apr 18.

Department of Obstetrics and Gynecology, William Beaumont Health, Royal Oak, MI, United States of America.

Objective: To interrogate the pathogenesis of intrauterine growth restriction (IUGR) and apply Artificial Intelligence (AI) techniques to multi-platform i.e. nuclear magnetic resonance (NMR) spectroscopy and mass spectrometry (MS) based metabolomic analysis for the prediction of IUGR. Read More

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http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0214121PLOS

Multichannel AC Biosusceptometry system to map biodistribution and assess the pharmacokinetic profile of magnetic nanoparticles by imaging.

IEEE Trans Nanobioscience 2019 Apr 18. Epub 2019 Apr 18.

In this paper, the application of a technique to evaluate in vivo biodistribution of magnetic nanoparticles (MNP) is addressed: the Multichannel AC Biosusceptometry System (MC-ACB). It allows real-time assessment of magnetic nanoparticles in both bloodstream clearance and liver accumulation, where a complex network of inter-related cells is responsible for MNP uptake. Based on the acquired MC-ACB images, we propose a mathematical model to help understand the distribution and accumulation pharmacokinetics of MNP. Read More

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http://dx.doi.org/10.1109/TNB.2019.2912073DOI Listing

Electric Stimulus-Responsive Chitosan/MNP composite Microbeads for a Drug Delivery System.

IEEE Trans Biomed Eng 2019 Apr 16. Epub 2019 Apr 16.

In the last several years, conventional Drug Delivery Systems (DDS) have evolved into DDS that are responsive to exogenous or endogenous stimuli. The objective of this work was to present a DDS that is responsive to an electric stimulus, in the form of bipolar electric pulses. The DDS structure is based on chitosan embedded with magnetic nanoparticles, and crosslinked with polyethylene glycol dimethacrylate to form microbeads. Read More

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http://dx.doi.org/10.1109/TBME.2019.2911579DOI Listing

Does Arthroscopic Suture-Spanning Augmentation of Single-Row Repair Reduce the Retear Rate of Massive Rotator Cuff Tear?

Am J Sports Med 2019 Apr 18:363546519836419. Epub 2019 Apr 18.

Department of Orthopaedics and Traumatology, Taipei Veterans General Hospital, Taipei, Taiwan.

Background: Several surgical techniques have been proposed for massive rotator cuff tears (MRCTs), but the failure rates remain high. The suture-spanning augmentation technique of single-row (SSA-SR) repair was shown to reduce failure rates in cadaveric studies, but the outcome in vivo remains unclear.

Purpose: To determine if adding spanning sutures to SR repair during MRCT repairs can improve functional outcome and reduce failure rates. Read More

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http://dx.doi.org/10.1177/0363546519836419DOI Listing

Construction of Paramagnetic Manganese-chelated Polymeric Nanoparticles Using Pyrene-end-modified Double-Hydrophilic Block-Copolymers for Enhanced Magnetic Resonance Relaxivity: A Comparative Study with Cisplatin Pharmacophore.

Langmuir 2019 Apr 18. Epub 2019 Apr 18.

Cationic metal-mediated self-assembly of double-hydrophilic block-copolymers (DHBCs) has been of great interest for the preparation of hybrid nanoparticles for versatile applications. Among many functional transition metal ions, manganese (Mn) is a highly attractive element due to the paramagnetic property with high coordination number. However, Mn does not lead to the efficient self-assembly of DHBCs because of the relatively high aqueous solubility of coordinated Mn. Read More

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http://dx.doi.org/10.1021/acs.langmuir.9b00406DOI Listing

Photomineralization of Effluent Organic Phosphorus to Orthophosphate under Simulated Light Illumination.

Environ Sci Technol 2019 Apr 18. Epub 2019 Apr 18.

CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry , University of Science and Technology of China , Hefei 230026 , P. R. China.

Organic phosphorus (OP), one of the main forms of phosphorus in effluent from biological wastewater treatment plants, may contribute to the bioavailable phosphorus pool as well as water eutrophication. However, little is known about the photomineralization of OP or the possible impacts on the phosphorus cycle in water bodies. Herein, the photomineralization of effluent OP was investigated. Read More

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http://dx.doi.org/10.1021/acs.est.9b00348DOI Listing

Effect of Noble Metals on Luminescence and Single-Molecule Magnet Behavior in the Cyanido-Bridged Ln-Ag and Ln-Au (Ln = Dy, Yb, Er) Complexes.

Inorg Chem 2019 Apr 18. Epub 2019 Apr 18.

Department of Chemistry, School of Science , The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku , Tokyo 113-0033 , Japan.

Self-assembly of lanthanide(III) complexes of 2,2':6',2″-terpyridine (terpy) with dicyanidoargentate(I) and dicyanidoaurate(I) anions in water results in the formation of six isostructural dinuclear systems [Ln(terpy)(HO)(NO)][M(CN)] (Ln/M = Dy/Ag, 1; Dy/Au, 2; Yb/Ag, 3; Yb/Au, 4; Er/Ag, 5; Er/Au, 6). They form three-dimensional supramolecular networks based on dinuclear molecules linked by hydrogen bonds, π-π interactions, and argentophilic (Ag···Ag) or aurophilic (Au···Au) interactions. All of the assemblies show complex solid-state strong UV and weak vis-NIR absorption due to overlapping contributions from 2,2':6',2″-terpyridine, dicyanidoargentate(I), dicyanidoaurate(I), and lanthanide(III) ions. Read More

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http://pubs.acs.org/doi/10.1021/acs.inorgchem.8b03634
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http://dx.doi.org/10.1021/acs.inorgchem.8b03634DOI Listing
April 2019
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Structure and Magnetism of (La/Sr)MIrO and Topochemically Reduced (La/Sr)MIrO (M = Fe, Co) Complex Oxides.

Inorg Chem 2019 Apr 18. Epub 2019 Apr 18.

Department of Chemistry, Inorganic Chemistry Laboratory , University of Oxford , South Parks Road , Oxford OX1 3QR , United Kingdom.

Neutron powder diffraction data show that SrFeIrO, SrCoIrO, and LaSrCoIrO all adopt undistorted, n = 1 Ruddlesden-Popper structures in which the Ir and Fe/Co/Co cations are statistically disordered over all the octahedral coordination sites. Magnetization data indicate the two cobalt phases are spin glasses at low temperature, while SrFeIrO appears to adopt an antiferromagnetic state with very small magnetically ordered domains. Topochemical reduction with a Zr getter converts the tetragonal AMIrO phases to the corresponding orthorhombic AMIrO phases in which the Ir and Fe/Co/Co cations are located in approximately square-planar coordination sites. Read More

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http://dx.doi.org/10.1021/acs.inorgchem.9b00541DOI Listing

Synthesis, Structure, and Magnetic Properties of Two Mercury Selenite Antiferromagnets HgM(SeO)(HO) (M = Co, Ni).

Inorg Chem 2019 Apr 18. Epub 2019 Apr 18.

State Key Laboratory of Structural Chemistry , Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences , Fuzhou , Fujian 350002 , PR China.

Two mercury selenite compounds HgM(SeO)(HO) (M = Co, Ni) are synthesized using a conventional hydrothermal method. Both compounds crystallize in the monoclinic structure with a C2/ c space group, and equivalent Co or Ni ions exhibit a stacked triangular lattice. Magnetic measurements suggest different magnetic properties between these two isostructural compounds, in which HgCo(SeO)(HO) undergoes a canted antiferromagnetic order below T = 7. Read More

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http://dx.doi.org/10.1021/acs.inorgchem.9b00008DOI Listing

Investigation of the molecular reactivity of bioactive oxiranylmethyloxy anthraquinones.

Arch Pharm (Weinheim) 2019 Apr 18:e1900030. Epub 2019 Apr 18.

Department of Molecular and Translational Medicine, University of Brescia, Brescia, Italy.

The design of a multitarget and multifunctional small molecule containing two functional groups reacting through different mechanisms represents an attractive goal for the medicinal chemist. The preparation of two bifunctional oxiranylmethyloxy anthraquinones, previously investigated as anticancer agents, is described here. These compounds combine a planar, DNA-intercalating and pro-oxidant anthraquinone scaffold and the alkylating epoxide functions which can covalently react with the nucleic acid. Read More

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https://onlinelibrary.wiley.com/doi/abs/10.1002/ardp.2019000
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http://dx.doi.org/10.1002/ardp.201900030DOI Listing
April 2019
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Correction: Facile N-functionalization and strong magnetic communication in a diuranium(v) bis-nitride complex.

Chem Sci 2019 Mar 6;10(12):3687. Epub 2019 Mar 6.

Institut des Sciences et Ingénierie Chimiques , Ecole Polytechnique Fédérale de Lausanne (EPFL) , CH-1015 Lausanne , Switzerland . Email:

[This corrects the article DOI: 10.1039/C8SC05721D.]. Read More

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http://dx.doi.org/10.1039/c9sc90049gDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6438353PMC

An exceptional group of non-small cell lung cancer difficult to diagnose: Evaluation of lipid-poor adrenal lesions.

Bosn J Basic Med Sci 2019 Apr 18. Epub 2019 Apr 18.

Nuclear Medicine Department, Firat University Medical Faculty, Elazığ, Turkey.

In some non-small cell lung cancer (NSCLC) patients, lipid-poor adrenal adenomas cannot be adequately differentiated from metastases using imaging methods. Invasive diagnostic procedures also have a low negative predictive value (NPV) in such cases. The current study aims to establish a specific and clinically practical metabolic parameter for lipid-poor adrenal lesions (ALs) in NSCLC patients. Read More

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http://dx.doi.org/10.17305/bjbms.2019.3837DOI Listing

Quantitative Analysis of SSEA3+ Cells from Human Umbilical Cord after Magnetic Sorting.

Cell Transplant 2019 Apr 18:963689719844260. Epub 2019 Apr 18.

2 W.M. Keck Center for Collaborative Neuroscience, Rutgers, the State University of New Jersey, Piscataway, New Jersey, USA.

Multilineage-differentiating stress-enduring (Muse) cells are a population of pluripotent stage-specific embryonic antigen 3 (SSEA3)+ mesenchymal stem cells first described by Mari Dezawa in 2010. Although some investigators have reported SSEA3+ mesenchymal cells in umbilical cord tissues, none have quantitatively compared SSEA3+ cells isolated from Wharton's jelly (WJ) and the cord lining (CL) of human umbilical cords (HUCs). We separated WJ and the CL from HUCs, cultured mesenchymal stromal cells (MSCs) isolated from these two tissues with collagenase, and quantified the percentage of SSEA3+ cells over three passages. Read More

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http://dx.doi.org/10.1177/0963689719844260DOI Listing

Sensitivity of Magnetic Anisotropy in the Solid State for Lanthanide Complexes with Small Crystal Field Splitting.

Inorg Chem 2019 Apr 18. Epub 2019 Apr 18.

School of Chemistry and Photon Science Institute , The University of Manchester , Oxford Road , Manchester , M13 9PL , U.K.

Knowledge of the crystal structure of a monometallic inorganic molecule is often sufficient to calculate its electronic structure and interpret its magnetic properties. Here we show that for a series of nine-coordinate lanthanide complexes based on the 1,4,7-tris[(6-carboxypyridin-2-yl)methyl]-1,4,7-triazacyclononane ligand, the electronic structure is hypersensitive to geometric structure and to the presence of noncoordinated lattice solvent, which renders the magnetic and spectroscopic properties very difficult to interpret. We explore possible explanations for the peculiar electron paramagnetic resonance (EPR) spectra and conclude that a number of entangled factors are at play across the samples. Read More

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http://dx.doi.org/10.1021/acs.inorgchem.9b00060DOI Listing

Three Co(II) Metal-Organic Frameworks with Diverse Architectures for Selective Gas Sorption and Magnetic Studies.

Inorg Chem 2019 Apr 18. Epub 2019 Apr 18.

Department of Chemistry , Indian Institute of Technology , Kharagpur , Kharagpur-721302 WB , India.

Three Co(II) metal-organic frameworks, namely, {[Co(L)(OBA)(HO)]· xG} (1), {[Co(L)(OBA)]· xG} (2), and {[Co(L)(OBA)(HO)]·DMA· xG} (3) [where L = 2,5-bis(3-pyridyl)-3,4-diaza-2,4-hexadiene, HOBA = 4,4'-oxybisbenzoic acid, DMF = dimethylformamide, DMA = dimethylacetamide, and G denotes disordered guest molecules], have been synthesized under diverse reaction conditions through self-assembly of a bent dicarboxylate and a linear spacer with a Co(II) ion. While 1 is crystallized at room temperature in DMF to form a 2D layer structure, 2 is formed by the assembly of similar components under solvothermal conditions with a 3D network structure. On the other hand, changing the solvent to DMA, 3 could be crystallized at room temperature with a 3D architecture. Read More

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http://dx.doi.org/10.1021/acs.inorgchem.9b00471DOI Listing

Surface Charge-Reversible Tubular Micromotors for Extraction of Nucleic Acids in Microsystems.

Chem Asian J 2019 Apr 17. Epub 2019 Apr 17.

Wuhan University of Technology, 122 Luoshi road, Wuhan, CHINA.

Extraction of nucleic acids in microsystems is of significance for biomedical applications, but the current extraction methods generally require sophisticated microchannels and external equipment, hindering their practical applications. In this work, we have demonstrated a simple, versatile and efficient approach to extract nucleic acids in microsystems by developing cationic branched polyethyleneimine (PEI)-functionalized tubular micromotors. The as-developed tubular micromotors are fabricated by a two-step process combining the template-assisted electrodeposition and carbodiimide chemistry, and contain an inner catalytic Pt layer, a middle magnetic Ni layer and an outer cationic PEI layer. Read More

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http://dx.doi.org/10.1002/asia.201900427DOI Listing

RNA dynamics by NMR.

Chembiochem 2019 Apr 17. Epub 2019 Apr 17.

Karolinska Institute, Medical Biochemistry and Biophysics, Scheeles Väg 2, 17177, Stockholm, SWEDEN.

An ever-increasing number of functional RNAs require mechanistic understanding. RNA function relies on changes in its structure, so-called dynamics. To reveal dynamic processes and higher energy structures, new Nuclear Magnetic Resonance (NMR) methods have been developed to elucidate these dynamics in RNA with atomic resolution. Read More

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http://dx.doi.org/10.1002/cbic.201900072DOI Listing

Single-Stimulus-Induced Modulation of Multiple Optical Properties.

Adv Mater 2019 Apr 18:e1900388. Epub 2019 Apr 18.

Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University-Western University Centre for Synchrotron Radiation Research, Soochow University, Suzhou, 215123, P. R. China.

Stimuli-responsive smart optical materials hold great promise for applications in active optics, display, sensing, energy conversion, military camouflage, and artificial intelligence. However, their applications are greatly restricted by the difficulty of tuning different optical properties within the same material, especially by a single stimulus. Here, magnetic modulations of multiple optical properties are demonstrated in a crystalline colloidal array (CCA) of magnetic nanorods. Read More

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http://dx.doi.org/10.1002/adma.201900388DOI Listing

Evidence of Spin Frustration in a Vanadium Diselenide Monolayer Magnet.

Adv Mater 2019 Apr 18:e1901185. Epub 2019 Apr 18.

Centre for Advanced 2D Materials (CA2DM) and Graphene Research Centre (GRC), National University of Singapore, 6 Science Drive 2, Singapore, 117546, Singapore.

Monolayer VSe , featuring both charge density wave and magnetism phenomena, represents a unique van der Waals magnet in the family of metallic 2D transition-metal dichalcogenides (2D-TMDs). Herein, by means of in situ microscopy and spectroscopic techniques, including scanning tunneling microscopy/spectroscopy, synchrotron X-ray and angle-resolved photoemission, and X-ray absorption, direct spectroscopic signatures are established, that identify the metallic 1T-phase and vanadium 3d electronic configuration in monolayer VSe grown on graphite by molecular-beam epitaxy. Element-specific X-ray magnetic circular dichroism, complemented with magnetic susceptibility measurements, further reveals monolayer VSe as a frustrated magnet, with its spins exhibiting subtle correlations, albeit in the absence of a long-range magnetic order down to 2 K and up to a 7 T magnetic field. Read More

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https://onlinelibrary.wiley.com/doi/abs/10.1002/adma.2019011
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http://dx.doi.org/10.1002/adma.201901185DOI Listing
April 2019
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17.493 Impact Factor

Three new ent-abietane diterpenoids from the roots of Euphorbia fischeriana and their cytotoxicity in human tumor cell lines.

Arch Pharm Res 2019 Apr 17. Epub 2019 Apr 17.

Department of Pharmacy, Taihe Hospital, Hubei University of Medicine, Shiyan, 442000, People's Republic of China.

Three new ent-abietane diterpenoids, termed fischerianoids A-C (1-3), were isolated and identified from the ethyl acetate extracts of roots of the medicinally valuable plant Euphorbia fischeriana. The planar and relative structures of 1-3 were established via high-resolution electrospray ionisation mass spectrometry and one- and two-dimensional nuclear magnetic resonance spectroscopic analyses, and the absolute configuration of 1 was further established via X-ray crystallography experiment. Compounds 1-3 showed selective inhibitory potency against certain human tumor cell lines with IC values ranging from 8. Read More

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http://dx.doi.org/10.1007/s12272-019-01151-yDOI Listing

Cellular Automata Tractography: Fast Geodesic Diffusion MR Tractography and Connectivity Based Segmentation on the GPU.

Authors:
Andac Hamamci

Neuroinformatics 2019 Apr 17. Epub 2019 Apr 17.

Faculty of Engineering, Department of Biomedical Engineering, Yeditepe University, Istanbul, Turkey.

Geodesic based tractography on diffusion magnetic resonance data is a method to devise long distance connectivities among the brain regions. In this study, cellular automata technique is applied to the geodesic tractography problem and the algorithm is implemented on a graphics processing unit. Cellular automaton based method is preferable to current techniques due to its parallel nature and ability to solve the connectivity based segmentation problem with the same computational complexity, which has important applications in neuroimaging. Read More

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http://link.springer.com/10.1007/s12021-019-09425-y
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http://dx.doi.org/10.1007/s12021-019-09425-yDOI Listing
April 2019
1 Read

Magnetic Resonance Imaging in 14 Patients with Congenital Oculomotor Nerve Palsy.

Clin Neuroradiol 2019 Apr 17. Epub 2019 Apr 17.

Department of Ophthalmology, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, Korea (Republic of).

Purpose: To elucidate the imaging findings of congenital oculomotor nerve palsy by evaluating the oculomotor nerve and extraocular muscles on magnetic resonance (MR) imaging in a relatively large series of 14 patients with congenital oculomotor nerve palsy.

Methods: Ophthalmologic examination of 14 consecutive patients diagnosed with congenital oculomotor nerve palsy, and MR imaging of the orbit and oculomotor nerves were performed.

Results: Of the 14 patients with congenital oculomotor nerve palsy, 13 patients (93%) were unilateral and 12 patients (86%) had incomplete palsy. Read More

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http://link.springer.com/10.1007/s00062-019-00781-5
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http://dx.doi.org/10.1007/s00062-019-00781-5DOI Listing
April 2019
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Sex-Related Differences in Brain Volumes and Cerebral Blood Flow Among Overweight and Obese Adults With Type 2 Diabetes: Exploratory Analyses from the Action for Health in Diabetes Brain Magnetic Resonance Imaging Study.

J Gerontol A Biol Sci Med Sci 2019 Apr 8. Epub 2019 Apr 8.

Biomedical Imaging Center, Pennington Biomedical Research Center, Baton Rouge, LA.

Background: Sex may be an important modifier of brain health in response to risk factors. We compared brain structure and function of older overweight and obese women and men with Type 2 diabetes mellitus (T2DM).

Methods: Cross-sectional cognitive assessments and magnetic resonance images (MRI) were obtained in 224 women and 95 men (mean age 69) with histories of T2DM and overweight or obesity. Read More

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http://dx.doi.org/10.1093/gerona/glz090DOI Listing

Computational study of the mixed B-site perovskite SmBCoO (B = Mn, Fe, Ni, Cu) for next generation solid oxide fuel cell cathodes.

Phys Chem Chem Phys 2019 Apr 18. Epub 2019 Apr 18.

Department of Chemistry, University College London, WC1H 0AJ, London, UK. and School of Chemistry, Cardiff University, Main Building, Park Place, CF10 3AT, Cardiff, UK.

SmCoO3 is a promising perovskite material for the next generation of intermediate temperature solid oxide fuel cells (SOFC), but its potential application is directly linked to, and dependent on, the presence of dopant ions. Doping on the Co-site is suggested to improve the catalytic and electronic properties of this cathode material. Fe, Mn, Ni, and Cu have been proposed as possible dopants and experimental studies have investigated and confirmed the potential of these materials. Read More

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http://dx.doi.org/10.1039/c9cp00995gDOI Listing

Heat transfer enhancement in the boundary layer flow of hybrid nanofluids due to variable viscosity and natural convection.

Heliyon 2019 Apr 4;5(4):e01469. Epub 2019 Apr 4.

Department of Studies and Research in Mathematics, Kuvempu University, Shankaraghatta, 577 451, Shimoga, Karnataka, India.

The aim of the current work is to explore how heat transfer can be enhanced by variations in the basic properties of fluids in the presence of free convection with the aid of suspended hybrid nanofluids. Also, the influence of the Laurentz force on the flow is considered. The mathematical equations are converted into a pair of self-similarity equations by applying appropriate transformations. Read More

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http://dx.doi.org/10.1016/j.heliyon.2019.e01469DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6451174PMC

Remote magnetic navigation-guided ventricular tachycardia ablation with continuous-flow mechanical circulatory support.

HeartRhythm Case Rep 2019 Apr 25;5(4):217-220. Epub 2019 Jan 25.

Department of Cardiology, Erasmus MC, University Medical Center, Rotterdam, The Netherlands.

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http://dx.doi.org/10.1016/j.hrcr.2019.01.002DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6453544PMC

An experimental study on the early diagnosis of traumatic brain injury in rabbits based on a noncontact and portable system.

PeerJ 2019 12;7:e6717. Epub 2019 Apr 12.

College of Biomedical Engineering, Army Medical University, Chongqing, China.

Closed cerebral hemorrhage (CCH) is a common symptom in traumatic brain injury (TBI) patients who suffer intracranial hemorrhage with the dura mater remaining intact. The diagnosis of CCH patients prior to hospitalization and in the early stage of the disease can help patients get earlier treatments that improve outcomes. In this study, a noncontact, portable system for early TBI-induced CCH detection was constructed that measures the magnetic induction phase shift (MIPS), which is associated with the mean brain conductivity caused by the ratio between the liquid (blood/CSF and the intracranial tissues) change. Read More

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http://dx.doi.org/10.7717/peerj.6717DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6463870PMC

Body-Mounted Robot for Image-Guided Percutaneous Interventions: Mechanical Design and Preliminary Accuracy Evaluation.

Rep U S 2018 Oct 7;2018:1443-1448. Epub 2019 Jan 7.

N. Patel, J. Yan, D. Levi and I. Iordachita are with the Laboratory for Computational Sensing and Robotics, Johns Hopkins University, 3400 N. Charles Street, Baltimore, MD 21218. J. Yan is also with Harbin Institute of Technology, Harbin, 150000 China.

This paper presents a body-mounted, four degree-of-freedom (4-DOF) parallel mechanism robot for image-guided percutaneous interventions. The design of the robot is optimized to be light weight and compact such that it could be mounted to the patient body. It has a modular design that can be adopted for assisting various image-guided, needle-based percutaneous interventions such as arthrography, biopsy and brachytherapy seed placement. Read More

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http://dx.doi.org/10.1109/IROS.2018.8593807DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6463871PMC
October 2018

Colossal left ventricular apical thrombus.

Clin Case Rep 2019 Apr 3;7(4):846-848. Epub 2019 Mar 3.

Section of Cardiology, Department of Internal Medicine, Max Rady College of Medicine, Rady Faculty of Health Sciences University of Manitoba Winnipeg Manitoba Canada.

Left ventricular apical thrombus is a known complication following an anterior ST-elevation myocardial infarction. Although left ventriculography may suggest an apical thrombus in the presence of a filling defect, additional imaging with echocardiography and/or cardiac magnetic resonance is strongly recommended to further characterize the thrombus post myocardial infarction. Read More

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http://dx.doi.org/10.1002/ccr3.2081DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6452471PMC

Apical hypertrophic cardiomyopathy with preexcitation presenting as a myocardial infarction and ischemic stroke with a history of recurrent syncope: A case report.

Clin Case Rep 2019 Apr 14;7(4):816-820. Epub 2019 Mar 14.

Centre for Research and Development Uppsala University/Region Gävleborg Gävle Sweden.

Contrast-enhanced echocardiography or cardiac magnetic resonance imaging is of value in the diagnosis of apical hypertrophic cardiomyopathy. Apical hypertrophic cardiomyopathy is rare in Caucasians, and gene negativity does not rule out the diagnosis. Risk stratification for sudden cardiac death and decisions about anticoagulation in cases with atrial fibrillation should be based on guidelines. Read More

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https://onlinelibrary.wiley.com/doi/abs/10.1002/ccr3.2104
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http://dx.doi.org/10.1002/ccr3.2104DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6452448PMC
April 2019
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Exercise-related sudden cardiac death of an American football player with arrhythmogenic right ventricular dysplasia/cardiomyopathy AND sarcoidosis.

Clin Case Rep 2019 Apr 19;7(4):686-688. Epub 2019 Feb 19.

Department of Electrophysiology, Heart Center University of Leipzig Leipzig Germany.

This case emphasizes the value of cardiac MRI and genetic testing in the early phase of ARVD/C. It also emphasizes the increased risk of SCD for patients with ARVD/C participating in competitive sports, even with immediate cardiopulmonary resuscitation. Read More

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http://dx.doi.org/10.1002/ccr3.2071DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6452462PMC

Highlighting spin selectivity properties of chiral electrode surfaces from redox potential modulation of an achiral probe under an applied magnetic field.

Chem Sci 2019 Mar 4;10(9):2750-2757. Epub 2019 Jan 4.

Dipartimento di Chimica , Università degli Studi di Milano , via Golgi 19 , 20133 Milano , Italy . Email: ; Email: ; Email:

Impressive spin-related effects are observed in cyclic voltammetry (CV) experiments performed under an applied magnetic field on a non-ferromagnetic electrode modified with a thin electroactive oligothiophene film, either "inherently chiral" or featuring chiral pendants with stereogenic centres. When flipping the magnet's north/south orientation, the CV peaks of two achiral, chemically reversible Fe(iii)/Fe(ii) redox couples in aqueous or organic solution undergo impressive potential shifts (up to nearly 0.5 V depending on protocol conditions), specularly by changing the film's ()- or ()-configuration. Read More

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http://dx.doi.org/10.1039/c8sc04126aDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6419932PMC

UV-irradiation of self-assembled triphenylamines affords persistent and regenerable radicals.

Chem Sci 2019 Mar 10;10(9):2670-2677. Epub 2019 Jan 10.

Department of Chemistry and Biochemistry , University of South Carolina , Columbia , South Carolina 29208 , USA . Email:

UV-irradiation of assembled urea-tethered triphenylamine dimers results in the formation of persistent radicals, whereas radicals generated in solution are reactive and quickly degrade. In the solid-state, high quantities of radicals (approximately 1 in 150 molecules) are formed with a half-life of one week with no significant change in the single crystal X-ray diffraction. Remarkably, after decay, re-irradiation of the solid sample regenerates the radicals to their original concentration. Read More

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http://xlink.rsc.org/?DOI=C8SC04607G
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http://dx.doi.org/10.1039/c8sc04607gDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6419929PMC
March 2019
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Surface radio-mineralisation mediates chelate-free radiolabelling of iron oxide nanoparticles.

Chem Sci 2019 Mar 9;10(9):2592-2597. Epub 2019 Jan 9.

School of Life Science, Pharmacy & Chemistry , Kingston University , Penrhyn Road , Kingston upon Thames , KT1 2EE , UK . Email:

We introduce the concept of surface radio-mineralisation (SRM) to describe the chelate-free radiolabelling of iron-oxide and ferrite nanoparticles. We demonstrate the effectiveness of SRM with both In and Zr for bare, polymer-matrix multicore, and surface-functionalised magnetite/maghemite nanoparticles; and for bare YFeO nanoparticles. By analogy with geological mineralisation (the hydrothermal deposition of metals as minerals in ore bodies or lodes) we demonstrate that the heat-induced and aqueous SRM process deposits radiometal-oxides onto the nanoparticle or core surfaces, passing through the matrix or coating if present, without changing the size, structure, or magnetic properties of the nanoparticle or core. Read More

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http://dx.doi.org/10.1039/c8sc04895aDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6419938PMC
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