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https://www.readbyqxmd.com/read/30106630/a-combined-outpatient-and-inpatient-overnight-water-deprivation-test-is-effective-and-safe-in-diagnosing-patients-with-the-polyuria-polydipsia-syndrome
#1
William Pedrosa, Juliana Beaudette Drummond, Beatriz Santana Soares, Antônio Ribeiro-Oliveira
OBJECTIVES: The water deprivation test (WDT) is widely used for the differential diagnosis of the polyuria-polydipsia syndrome (PPS). However, it is inconvenient and may not always be precise in differentiating partial forms of diabetes insipidus (DI) from primary polydipsia (PP). The aim of this study was to evaluate the results of a combined outpatient and inpatient overnight WDT protocol that included an overnight non-supervised period concerning its feasibility and safety. METHODS: Retrospective analysis of clinical data and laboratory results of 52 patients with PPS undergoing WDT in a single center was undertaken...
August 14, 2018: Endocrine Practice
https://www.readbyqxmd.com/read/30106050/effects-of-repetitive-transcranial-magnetic-stimulation-on-cognitive-function-and-cholinergic-activity-in-the-rat-hippocampus-after-vascular-dementia
#2
Xiao-Qiao Zhang, Li Li, Jiang-Tao Huo, Min Cheng, Lin-Hong Li
Repetitive transcranial magnetic stimulation (rTMS) is a non-invasive treatment that can enhance the recovery of neurological function after stroke. Whether it can similarly promote the recovery of cognitive function after vascular dementia remains unknown. In this study, a rat model for vascular dementia was established by the two-vessel occlusion method. Two days after injury, 30 pulses of rTMS were administered to each cerebral hemisphere at a frequency of 0.5 Hz and a magnetic field intensity of 1.33 T...
August 2018: Neural Regeneration Research
https://www.readbyqxmd.com/read/30105225/facile-preparation-of-hydrophobic-aluminum-oxide-film-via-sol-gel-method
#3
Changqing Fang, Mengyuan Pu, Xing Zhou, Wanqing Lei, Lu Pei, Chenxi Wang
Hydrophobic aluminum oxide films (AOFs) are widely used in anti-oxidation and anti-corrosion applications. In preparing AOFs, complex and high temperature conditions are usually necessary. Here, we report aluminum nanowire structures with hydrophobic properties, prepared using a facile sol-gel method by magnetic stirrer and hydrothermal reaction. The electromagnetic force work has great influence on the structure of AOFs. The surface morphology and compositions of the AOFs were analyzed by scanning electron microscope (SEM), energy dispersive X-ray spec-trometers (EDS), X-ray diffraction (XRD), 3M peeling test, and X-ray photoelectron spectroscopy (XPS)...
2018: Frontiers in Chemistry
https://www.readbyqxmd.com/read/30103159/composite-polymer-coated-magnetic-nanoparticles-based-anode-enhances-dye-degradation-and-power-production-in-microbial-fuel-cells
#4
Mrinal Kumar Sarma, Mohd Golam Abdul Quadir, Rupam Bhaduri, Sharbani Kaushik, Pranab Goswami
Combined power generation and waste degradation through microbial fuel cell (MFC) technology is emerging as an attractive solution for controlling pollution in water bodies. Cyanobacteria as fuel cell catalysts for such shared energy activities are not well studied even though these possess robust metabolic systems supporting exo-electrogenicity, biodegradation of toxic compounds, and their survival under wide environmental conditions. Herein, a dual chambered (50 ml each) MFC assembled with Synechococcus sp...
July 31, 2018: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/30102436/renal-functional-mri-and-its-application
#5
Jia-Ying Zhou, Yuan-Cheng Wang, Chu-Hui Zeng, Sheng-Hong Ju
Renal function varies according to the nature and stage of diseases. Renal functional magnetic resonance imaging (fMRI), a technique considered superior to the most common method used to estimate the glomerular filtration rate, allows for noninvasive, accurate measurements of renal structures and functions in both animals and humans. It has become increasingly prevalent in research and clinical applications. In recent years, renal fMRI has developed rapidly with progress in MRI hardware and emerging postprocessing algorithms...
August 13, 2018: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/30100345/high-concentration-iodinated-contrast-media-for-t1-weighted-direct-magnetic-resonance-arthrography
#6
Y-F Huang, T-J Hsieh, Y-J Chen, H-S Chen, Y-T Kuo, Y-H Yang
AIM: To quantify in vitro the T1-weighted (T1W) expression of iodinated contrast media (CM), and to compare the in vivo performances of iodinated CM and gadolinium-based CM for T1W direct magnetic resonance imaging (MRI) arthrography. MATERIALS AND METHODS: An in vitro study on a 1.5 T MRI system was performed using Gd-DOTA, a mixture of iopromide and Gd-DOTA, and iopromide alone. The fat-suppressed (FS) T1W signal intensities were measured and analysed. In an in vivo study, 15 normal rabbits were used to compare the expression of iopromide (370 mg iodine/ml), and the mixture of iopromide and diluted Gd-DOTA...
August 9, 2018: Clinical Radiology
https://www.readbyqxmd.com/read/30097816/the-role-of-nanomaterials-and-nanotechnologies-in-wastewater-treatment-a-bibliometric-analysis
#7
REVIEW
Meng Jiang, Yun Qi, Huan Liu, Yinguang Chen
Nanomaterials and nanotechnologies (NNs) have been shaping the wastewater treatment process unprecedentedly. Bibliometric methods are regarded as an indispensable light to guide direction in scientific domain. The present study aims to investigate the role of NNs in wastewater treatment with bibliometric techniques based on SCI databases from 1997 to 2016. Results showed that China (962), USA (324) and Iran (140) are the most productive countries. Chinese Academy of Sciences (149), Tongji University (49), and Harbin Institute of Technology (40) from China are the most contributive institutions...
August 10, 2018: Nanoscale Research Letters
https://www.readbyqxmd.com/read/30095366/preparation-and-re-activation-of-magnetic-biochar-by-molten-salt-method-relevant-performance-for-chlorine-containing-pesticides-abatement
#8
Shi-Jin Dai, You-Cai Zhao, Dong-Jie Niu, Qiang Li, Yu Chen
Molten salt has been regarded as a versatile and environmental-friendly method for the material preparation and waste destruction. In this work, molten FeCl3 was utilized for the generation of magnetic biochar (MBC) derived from simultaneous activation and magnetization of biomass. The sample characterization indicated that MBC had a rough surface with BET surface area of 404 m2/g and total pore volume of 0.35cm3/g. Highly dispersed Fe3O4 and nitrogen could be deposited on the surface, leading to an excellent magnetization property...
August 10, 2018: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/30095255/computationally-assisted-design-of-polarizing-agents-for-dynamic-nuclear-polarization-enhanced-nmr-the-asympol-family
#9
Frederic Mentink-Vigier, Ildefonso Marin-Montesinos, Anil P Jagtap, Thomas Halbritter, Johan Van Tol, Sabine Hediger, Daniel Lee, Snorri Th Sigurdsson, Gaël De Paëpe
We introduce a new family of highly efficient polarizing agents for dynamic nuclear polarization (DNP)-enhanced nuclear magnetic resonance (NMR) applications, composed of asymmetric bis-nitroxides, in which a piperidine-based radical and a pyrrolinoxyl or a proxyl radical are linked together. The design of the AsymPol family was guided by the use of advanced simulations that allow computation of the impact of the radical structure on DNP efficiency. These simulations suggested the use of a relatively short linker with the intention to generate a sizable intramolecular electron dipolar coupling / J-exchange interaction, while avoiding parallel nitroxide orientations...
August 10, 2018: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/30094673/kinetics-isotherm-and-optimization-of-the-hexavalent-chromium-removal-from-aqueous-solution-by-a-magnetic-nanobiosorbent
#10
Majid Daneshvar, Mohammad Raouf Hosseini
Sorption is the most effective approach to the treatment of acid mine drainage (AMD) and wastewaters, but the removal of the adsorbents from water has always been a challenging problem which may be resolved by using magnetic separation. In this work, a magnetic bioadsorbent was prepared using low cost and high-performance sources and applied in Cr(VI) removal from a synthetic solution. Initially, magnetite nanoparticles were synthesized from iron boring scraps by chemical co-precipitation method. Results of dynamic light scattering (DLS) and vibrating sample magnetometry (VSM) analyses showed that the synthesized nanoparticles were around 40 nm in size and had a significant magnetization...
August 9, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/30094370/dti-based-upper-limit-of-voxel-free-water-fraction
#11
Paul M Macey, M Albert Thomas, Luke A Henderson
Background: Free water (FW) in neuroimaging is non-flowing extracellular water in the cranium and brain tissue, and includes both cerebral spinal fluid (CSF) and fluid in intercellular space or edema. For a region such as a voxel (spatial unit of measurement in neuroimaging), the FW fraction is defined as the volume fraction of FW within that volume. Quantifying the FW fraction allows estimating contamination by fluid of neuroimaging or magnetic resonance spectroscopy measurements within a voxel...
July 2018: Heliyon
https://www.readbyqxmd.com/read/30093031/purification-characterization-and-antioxidant-activity-of-dextran-produced-by-leuconostoc-pseudomesenteroides-from-homemade-wine
#12
Renpeng Du, Xiaoxiao Qiao, Fangkun Zhao, Qiaozhi Song, Qingqing Zhou, Yu Wang, Lei Pan, Ye Han, Zhijiang Zhou
An exopolysaccharide (EPS) was produced by Leuconostoc pseudomesenteroides DRP-5 isolated from homemade wine. The EPS was obtained with ethanol extraction, which was further purified by chromatography of Sephadex G-100 to get a purified fraction. The monosaccharide composition of the EPS was glucose, and its molecular weight (Mw) was 6.23 × 106 Da, as determined by gas chromatography (GC) and high-performance size-exclusion chromatography (HPSEC). Fourier transform infrared spectra (FT-IR) and nuclear magnetic resonance spectra (NMR) showed that the EPS was a linear glucan with α-(1→6)-linked glucosidic bonds...
October 15, 2018: Carbohydrate Polymers
https://www.readbyqxmd.com/read/30092965/anthracycline-therapy-is-associated-with-cardiomyocyte-atrophy-and-preclinical-manifestations-of-heart-disease
#13
Thiago Ferreira de Souza, Thiago Quinaglia A C Silva, Felipe Osorio Costa, Ravi Shah, Tomas G Neilan, Lício Velloso, Wilson Nadruz, Fabricio Brenelli, Andrei Carvalho Sposito, Jose Roberto Matos-Souza, Fernando Cendes, Otávio Rizzi Coelho, Michael Jerosch-Herold, Otavio Rizzi Coelho-Filho
OBJECTIVES: The goal of this study was to demonstrate that cardiac magnetic resonance could reveal anthracycline-induced early tissue remodeling and its relation to cardiac dysfunction and left ventricular (LV) atrophy. BACKGROUND: Serum biomarkers of cardiac dysfunction, although elevated after chemotherapy, lack specificity for the mechanism of myocardial tissue alterations. METHODS: A total of 27 women with breast cancer (mean age 51.8 ± 8...
August 2018: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/30091894/anchoring-fe3o4-nanoparticles-on-carbon-nanotube-for-microwave-induced-catalytic-degradation-of-antibiotics
#14
Shiyuan Liu, Lefu Mei, Xiaoliang Liang, Libing Liao, Guocheng Lv, Shuaifei Ma, Shiyao Lu, Amr M Abdelkader, Kai Xi
Microwave induced catalytic degradation is considered amongst the most efficient techniques to remove antibiotic such as chlortetracycline from contaminated water. Described here is a new microwave induced oxidation catalyst based on carbon nanotube decorated uniformly with nanoparticles of Fe3O4. The combination of dielectric loss and magnetic loss of the material contributed to its stronger microwave absorption and the ability to produce more "hot spots". These hot spots promoted the oxidation of common antibiotics like chlortetracycline, tetracycline and oxytetracycline under microwave irradiation...
August 9, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/30090896/effect-of-microparticulation-and-xanthan-gum-on-the-stability-and-lipid-digestion-of-oil-in-water-emulsions-stabilized-by-whey-protein
#15
Chanchan Sun, Rui Liu, Huanjing Sheng, Ruijun Wang, Zesheng Zhang, Jiang Zhao, Min Zhang
Since lipid digestion is an interfacial process, food emulsions are increasingly being seen as a mechanism for controlling lipid uptake. Oil-in-water emulsions stabilized by whey protein (WP) and protein-xanthan gum (XG) mixtures were designed to investigate the influence of interfacial structures on lipid digestion using an in vitro digestion model. The interfacial layers with different structures were designed using microparticulated whey protein (MWP) and MWP-XG mixtures. The increase in the volume average diameter of proteins indicated that the WPs aggregated to form micro-particles during microparticulation...
August 9, 2018: Food & Function
https://www.readbyqxmd.com/read/30090302/probing-molecular-dynamics-with-hyperpolarized-ultrafast-laplace-nmr-using-a-low-field-single-sided-magnet
#16
Jared N King, Alfredo Fallorina, Justin Yu, Guannan Zhang, Ville-Veikko Telkki, Christian Hilty, Tyler Meldrum
Laplace NMR (LNMR) offers deep insights on diffusional and rotational motion of molecules. The so-called "ultrafast" approach, based on spatial data encoding, enables one to carry out a multidimensional LNMR experiment in a single scan, providing from 10 to 1000-fold acceleration of the experiment. Here, we demonstrate the feasibility of ultrafast diffusion- T 2 relaxation correlation ( D - T 2 ) measurements with a mobile, low-field, relatively low-cost, single-sided NMR magnet. We show that the method can probe a broad range of diffusion coefficients (at least from 10-8 to 10-12 m2 s-1 ) and reveal multiple components of fluids in heterogeneous materials...
July 28, 2018: Chemical Science
https://www.readbyqxmd.com/read/30088342/preparation-and-application-of-a-magnetic-plasticizer-as-a-molecularly-imprinted-polymer-adsorbing-material-for-the-determination-of-phthalic-acid-esters-in-aqueous-samples
#17
Shou-Lian Wei, Wan-Ting Liu, Xiao-Chen Huang, Jin-Kui Ma
A novel magnetic plasticizer molecularly imprinted polymers (MIPs) adsorbing material (MIP@mSiO2 -β-CD@Fe3 O4 ) was successfully synthesized for the determination of 6 phthalic acid esters in water, milk and wine samples. The molecularly imprinted polymers were prepared via precipitation polymerization and a surface molecular imprinting technique, using a cyclodextrin-modified magnetic meso-porous material (mSiO2 -β-CD@Fe3 O4 ) as magnetic supporter, dibutyl phthalate and butyl benzyl phthalate as the dual template molecules, methacrylic acid as the functional monomer, and ethyleneglycol dimethacrylate as the cross-linking agent...
August 8, 2018: Journal of Separation Science
https://www.readbyqxmd.com/read/30088340/covalent-triazine-based-frameworks-iron-oxide-for-highly-sensitive-magnetic-solid-phase-extraction-of-phenolic-pollutants-in-water-samples
#18
Jin-Qing Ma, Ji-Yun Ren, Lei-Lei Wang, Xia Wang, Jin-Ming Lin, Ru-Song Zhao
This paper demonstrates for the first time the enrichment potential of covalent triazine-based frameworks/iron oxide for the magnetic solid-phase extraction of seven typical polar phenolic pollutants. Important parameters, such as the eluant and its volume, adsorbent amounts, sample pH, extraction time, and ionic strength, were optimized in detail. Under the optimal conditions, low limits of detection (0.09-0.53 ng mL-1 ), wide linear range (25-2000 ng mL-1 ), good repeatability (1.2-8.3%) and good reproducibility (1...
August 7, 2018: Journal of Separation Science
https://www.readbyqxmd.com/read/30088071/studying-neurons-and-glia-non-invasively-via-anomalous-subdiffusion-of-intracellular-metabolites
#19
Carson Ingo, Wyger Brink, Ece Ercan, Andrew G Webb, Itamar Ronen
Cells in the central nervous system, neurons and glia, display a wide range of structural features. Molecular diffusion properties in the intracellular space of these cells reflect this structural diversity, deviating from standard Gaussian dynamics and resulting in anomalous subdiffusion. By tracking the displacement of intracellular metabolites, diffusion-weighted magnetic resonance spectroscopy allows for in vivo compartment-specific and cell-preferential morphological analysis of neurons and glia in the human brain...
August 7, 2018: Brain Structure & Function
https://www.readbyqxmd.com/read/30087563/facile-fabrication-of-hypericin-entrapped-glyconanoparticles-for-targeted-photodynamic-therapy
#20
Chen Shao, Kun Shang, Huaibao Xu, Yu Zhang, Zhichao Pei, Yuxin Pei
Background: Photodynamic therapy is a safe, noninvasive modality for cancer therapy, in which the photosensitizer (PS) is a crucial component. Hypericin (Hy) is a promising PS; however, its clinical application is significantly limited by its poor hydrophilicity. Materials and methods: To overcome the clinical application limitation of Hy, a novel strategy is developed here by entrapping Hy into polydopamine (PDA) film formed on the surface of magnetic iron oxide nanoparticles (MNPs) through the self-polymerization of dopamine under alkaline condition...
2018: International Journal of Nanomedicine
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