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https://www.readbyqxmd.com/read/29046837/fabrication-of-carbon-nanospheres-by-the-pyrolysis-of-polyacrylonitrile-poly-methyl-methacrylate-core-shell-composite-nanoparticles
#1
Dafu Wei, Youwei Zhang, Jinping Fu
Carbon nanospheres with a high Brunauer-Emmett-Teller (BET) specific surface area were fabricated via the pyrolysis of polyacrylonitrile-poly(methyl methacrylate) (PAN-PMMA) core-shell nanoparticles. Firstly, PAN-PMMA nanoparticles at high concentration and low surfactant content were controllably synthesized by a two-stage azobisisobutyronitrile (AIBN)-initiated semicontinuous emulsion polymerization. The carbon nanospheres were obtained after the PAN core domain was converted into carbon and the PMMA shell was sacrificed via the subsequent heat treatment steps...
2017: Beilstein Journal of Nanotechnology
https://www.readbyqxmd.com/read/29045954/-pulmonary-arterial-hypertension-as-leading-manifestation-of-methylmalonic-aciduria-clinical-characteristics-and-gene-testing-in-15-cases
#2
X Q Liu, H Yan, J X Qiu, C Y Zhang, J G Qi, X Zhang, H J Xiao, Y L Yang, Y H Chen, J B DU
OBJECTIVE: To deepen our understanding of Methylmalonic aciduria (MMA) associated pulmonary hypertension (PH) by analyzing the characteristics of clinical presentation, pulmonary high resolusion CT(HRCT), treatment response and gene mutation. METHODS: This study includes 15 cases of pediatric patients with MMA associated PH diagnosed and treated in Peking University First Hospital pediatric department between May 2012 and May 2016 with symptoms of PH as their leading presentation...
October 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/29042959/diagnosis-of-cobalamin-c-deficiency-with-renal-abnormality-from-onset-in-a-chinese-child-by-next-generation-sequencing-a-case-report
#3
Qiuxia Chen, Huaying Bao, Hongmei Wu, Sanlong Zhao, Songming Huang, Fei Zhao
The aim of the present study was to present the diagnosis and treatment course of a patient with cobalamin C deficiency (cblC) hospitalized with renal function abnormality from the onset. A female, 7-year-old patient who presented with a cough and progressive dyspnea for 1 day was admitted to the Children's Hospital of Nanjing Medical University (Nanjing, China). A routine clinical examination was performed, including physical examination, routine blood and urine tests, blood gas analysis, computed tomography scans of the head, chest and abdomen, electrocardiogram, echocardiography and abdominal ultrasonography...
October 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29041744/volume-holographic-recording-in-irgacure-784-doped-pmma-photopolymer
#4
Ying Liu, Fenglan Fan, Yifan Hong, Jinliang Zang, Guoguo Kang, Xiaodi Tan
Photoinitiator plays a crucial role on photopolymer. Unlike photoinitiator phenanthrenequinone (PQ), the solubility of Irgacure 784 dissolved in MMA is very high. In this paper, we use Irgacure 784 as photoinitiator doped in poly(methyl methacrylate)(PMMA)to make a bulk photopolymer with high photoinitiator concentration for holographic data storage. The effect of concentration of photoinitiator and record intensity are experimentally investigated. The results reveal the material has an optimum condition in holographic recording...
August 21, 2017: Optics Express
https://www.readbyqxmd.com/read/29039164/-screening-for-newborn-organic-aciduria-in-zhejiang-province-prevalence-outcome-and-follow-up
#5
Fang Hong, Xinwen Huang, Yu Zhang, Jianbin Yang, Fan Tong, Huaqing Mao, Xiaolei Huang, Xuelian Zhou, Rulai Yang, Zhengyan Zhao
OBJECTIVE: To analyze the results and follow up data of screening for newborn organic aciduria in Zhejiang province. METHODS: The results and follow-up data of 1 861 262 newborns from Zhejiang province undergoing screening for organic aciduria during January 2009 and December 2016 were retrospectively analyzed. The acylcarnitine spectrum in urine samples was detected by tandem mass spectrum (MS/MS) and the positive patients were confirmed by urine gas chromatography mass spectrometry and/or gene analysis...
May 25, 2017: Zhejiang da Xue Xue Bao. Yi Xue Ban, Journal of Zhejiang University. Medical Sciences
https://www.readbyqxmd.com/read/29037570/trace-elements-and-arsenic-speciation-in-tissues-of-tube-dwelling-polychaetes-from-hydrothermal-vent-ecosystems-east-pacific-rise-an-ecological-role-as-antipredatory-strategy
#6
Marta Di Carlo, Donato Giovannelli, Daniele Fattorini, Nadine Le Bris, Costantino Vetriani, Francesco Regoli
Hydrothermal vent systems are inhabited by dense benthic communities adapted to extreme conditions such as high temperature, hydrogen sulphide (H2S) and elevated fluxes of metals. In the present work, a wide range of trace elements (Ag, Al, As, Ba, Cd, Co, Cr, Cu, Fe, Hg, Mn, Ni, Pb, Sb, Se, V and Zn) were measured in tissues of three tube dwelling annelids, Alvinella pompejana, Alvinella caudata and Riftia pachyptila, which colonize distinct habitats of the East Pacific Rise (EPR) at 2500 m depth. Metals concentrations in alvinellids were often 2-4 orders of magnitude higher than those commonly found in marine organisms, while much lower values were observed in the vestimentiferan polychaete...
October 5, 2017: Marine Environmental Research
https://www.readbyqxmd.com/read/29035969/effects-of-medical-food-leucine-content-in-the-management-of-methylmalonic-and-propionic-acidemias
#7
Jennifer G Myles, Irini Manoli, Charles P Venditti
PURPOSE OF REVIEW: The current review highlights the varied effects of medical foods high in leucine (Leu) and devoid of valine (Val) and isoleucine (Ile) in the management of methylmalonic acidemia (MMA) and propionic acidemia and cobalamin C (cblC) deficiency, aiming to advance dietary practices. RECENT FINDINGS: Leu is a key metabolic regulator with a multitude of effects on different organ systems. Recent observational studies have demonstrated that these effects can have unintended consequences in patients with MMA as a result of liberal use of medical foods...
October 14, 2017: Current Opinion in Clinical Nutrition and Metabolic Care
https://www.readbyqxmd.com/read/29035782/opposing-effects-of-rheumatoid-arthritis-and-low-dose-prednisolone-on-arginine-metabolomics
#8
Anjana Radhakutty, Brenda L Mangelsdorf, Sophie M Drake, Andrew Rowland, Malcolm D Smith, Arduino A Mangoni, Campbell H Thompson, Morton G Burt
BACKGROUND AND AIMS: The effects of low dose prednisolone on circulating markers of endothelial function, the arginine metabolites asymmetric dimethyl arginine (ADMA), mono methyl arginine (MMA), and homoarginine, are uncertain. We assessed whether patients with rheumatoid arthritis have perturbations in arginine metabolite concentrations that are reversed by low dose prednisolone. METHODS: Eighteen rheumatoid arthritis patients who had not taken prednisolone for >6 months (non-glucocorticoid (GC) users), 18 rheumatoid arthritis patients taking continuous oral prednisolone (6...
October 6, 2017: Atherosclerosis
https://www.readbyqxmd.com/read/29019449/middle-meningeal-artery-embolization-for-chronic-subdural-hematoma
#9
Seung Pil Ban, Gyojun Hwang, Hyoung Soo Byoun, Tackeun Kim, Si Un Lee, Jae Seung Bang, Jung Ho Han, Chae-Yong Kim, O-Ki Kwon, Chang Wan Oh
Purpose To evaluate the effect of middle meningeal artery (MMA) embolization on chronic subdural hematoma (CSDH) and compare the treatment outcomes of MMA embolization and conventional treatment. Materials and Methods All consecutive patients 20 years or older with CSDH were assessed for eligibility. CSDHs with a focal location, a thickness of 10 mm or less, no mass effect, or underlying conditions were excluded. Seventy-two prospectively enrolled patients with CSDH underwent MMA embolization (embolization group; as the sole treatment in 27 [37...
October 10, 2017: Radiology
https://www.readbyqxmd.com/read/29017722/one-pot-synthesis-of-zeolitic-imidazolate-framework-8-poly-methyl-methacrylate-ethyleneglycol-dimethacrylate-monolith-coating-for-stir-bar-sorptive-extraction-of-phytohormones-from-fruit-samples-followed-by-high-performance-liquid-chromatography-ultraviolet
#10
Linna You, Man He, Beibei Chen, Bin Hu
In this work, zeolitic imidazolate framework-8 (ZIF-8)/poly (methyl methacrylate-ethyleneglycol dimethacrylate) (MMA-EGDMA) composite monolith was in situ synthesized on stir bar by one-pot polymerization. Compared with the neat monolith, ZIF-8/poly(MMA-EGDMA) composite monolith has larger surface area and pore volume. It also exhibits higher extraction efficiency for target phytohormones than poly(MMA-EGDMA) monolith and commercial polyethylene glycol (PEG) coated stir bar. Based on it, a method of ZIF-8/poly(MMA-EGDMA) monolith coated stir bar sorptive extraction (SBSE)-high performance liquid chromatography-ultraviolet detection (HPLC-UV) was established for the analysis of five phytohormones in apple and pear samples...
October 3, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28991760/centenary-of-the-birth-of-academician-prof-dr-isak-tadzer-founder-of-the-pathophysiology-and-nuclear-medicine-in-macedonia
#11
Borislav Karanfilski
Academician Prof. Dr. Isak Tadzer was born a hundred years ago on December 24, 1916 in Sofia. He completed the primary and secondary education at the German College in Sofia. In 1935 he began his studies at the Medical Faculty in Vienna, which he had to stop because of the annexation of Austria to Germany in 1938. He returned to Bulgaria where he continued his studies and graduated from the Medical Faculty in Sofia in 1941. During the War, 1941-1944, he was forcedly mobilized and he worked as a doctor in several villages...
September 1, 2017: Prilozi (Makedonska Akademija Na Naukite i Umetnostite. Oddelenie za Medicinski Nauki)
https://www.readbyqxmd.com/read/28987230/controversies-in-obstructive-sleep-apnea-surgery
#12
REVIEW
Carolyn C Dicus Brookes, Scott B Boyd
Obstructive sleep apnea (OSA) is a common chronic disease characterized by repetitive pharyngeal collapse during sleep. OSA is associated with cardiovascular disease and increased mortality, among other issues. Continuous positive airway pressure (CPAP) is considered first line therapy for OSA, but is not always tolerated. Both non-surgical and surgical alternative management strategies are available for the CPAP intolerant patient. This article explores controversies surrounding airway evaluation, definition of successful treatment, and surgical management of the CPAP intolerant patient with moderate to severe OSA...
November 2017: Oral and Maxillofacial Surgery Clinics of North America
https://www.readbyqxmd.com/read/28985078/kinetics-of-supersaturated-solution-with-restricted-size-of-precipitates-in-the-presence-of-dimer-adsorption-emission-and-monomer-monomer-agglomeration
#13
Gersh O Berim, Lana I Brim, Eli Ruckenstein
Kinetics of supersaturated solutions with restricted size of precipitating particles is considered using the microscopic theory which includes monomer-monomer agglomeration (MMA) and dimer adsorption/emission (DAE). It is shown that the system passes, during its evolution from initial to final state, through four consecutive stages. In stage I and stage III, the scaled size distribution of particles changes quickly with increasing time while in stage II and stage IV it is almost independent of time. It is argued that during stage II the system, at any rates of MMA and DAE, is in a regime similar to the asymptotic regime provided by the classical Lifshitz-Slyouzov-Wagner (LSW) theory where no restrictions on the size of the particles are imposed and MMA and DAE are not considered...
October 6, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28975143/data-of-pcl-b-p-mma-dmaema-2-characterization-and-related-assays
#14
Camila Franco, Michelli Barcelos Antonow, Aline Beckenkamp, Andréia Buffon, Taise Ceolin, Marli Luiza Tebaldi, Gustavo Pozza Silveira, Silvia Stanisçuaski Guterres, Adriana Raffin Pohlmann
The data presented here are related to the research paper entitled "PCL-b-P(MMA-co-DMAEMA)2 new triblock copolymer for novel pH-sensitive nanocapsules intended for drug delivery to tumors" by Franco et al. [1]. Characterization data of PCL-diol, macroinitiator Br-PCL-Br, homopolymers (PMMA and PDMAEMA) and copolymers (batch 1 and batch 2) analyzed by FTIR, SEC and NMR, as well as, characterization of PCL-NS formulation by laser diffraction and DLS analysis, initial nanocapsule formulations and 1C-NC and 2C-NC formulations, including hydrodynamic diameter at different pH media, and DMSO cytotoxicity...
December 2017: Data in Brief
https://www.readbyqxmd.com/read/28973653/middle-meningeal-artery-embolization-as-treatment-for-chronic-subdural-hematoma-a-case-series
#15
Thomas W Link, Srikanth Boddu, Joshua Marcus, Benjamin I Rapoport, Ehud Lavi, Jared Knopman
BACKGROUND: Traditional treatment for symptomatic subdural hematoma (SDH) has been surgical evacuation, but recurrence rates are high and patients often harbor complex medical comorbidities. Growth and recurrence is thought to be due to the highly friable nature of the vascularized membrane that forms after initial injury. There have been reported cases of middle meningeal artery (MMA) embolization for treatment of recurrent SDH after surgical evacuation with the goal of eliminating the arterial supply to this vascularized membrane...
July 25, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28965576/distribution-of-arsenic-and-oxidative-stress-in-mice-after-rice-ingestion
#16
Juliana Maria Oliveira Souza, Denise Grotto, Bruno Lemos Batista, Fernando Barbosa
This study evaluated the effects of rice naturally contaminated with arsenic (As) and the same As-species added as solubilized-salt on the redox state and the As distribution in male mice. The total As amount in the Brazilian polished rice used in this study was 169.81±6.12ngg(-1). Indeed, the concentrations of As species were 40.77ngg(-1) (arsenite, As(3+)), 65.71ngg(-1) (dimethylarsinic acid, DMA), 11.90ngg(-1) (monomethylarsonic acid, MMA), and 25.96ngg(-1) (arsenate, As(5+)). In this sense, animals were randomly divided into seven groups with six mice per group: I) control: habitual food; II) rice I: diet containing 10% of rice naturally containing As (4...
December 2017: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/28953632/effect-of-percutaneous-electrical-nerve-stimulation-for-the-treatment-of-migraine
#17
RANDOMIZED CONTROLLED TRIAL
Hong Li, Qiao-Rong Xu
BACKGROUND: This study aimed to assess the effectiveness and safety of percutaneous electrical nerve stimulation (PENS) in migraine treatment. METHODS: Sixty-two patients with at least 2 migration attacks each month were recruited and randomly divided into a verum PENS group and a sham PENS group in a ratio of 1:1. All patients received verum or sham PENS 30 minutes daily, 5 times weekly for 12 weeks. The primary outcomes were change in monthly migraine days (MMD) and the 50% responder rate (RR)...
September 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28953003/vitamin-b12-deficiency-in-inflammatory-bowel-disease-a-prospective-observational-pilot-study
#18
Robert Battat, Uri Kopylov, Joshua Byer, Maida J Sewitch, Elham Rahme, Hacene Nedjar, Elana Zelikovic, Serge Dionne, Talat Bessissow, Waqqas Afif, Paula J Waters, Ernest Seidman, Alain Bitton
BACKGROUND AND AIM: Diagnostic and management guidelines for vitamin B12 (cobalamin, Cbl) deficiency in inflammatory bowel disease (IBD) are lacking. True deficiency is defined as Cbl concentrations below reference range combined with elevated methylmalonic acid (MMA) concentrations. Studies analyzing Cbl status in IBD use only Cbl concentrations without confirmatory MMA. This study aims to determine the proportion of IBD patients with Cbl concentrations below reference range and their predisposing clinical and genetic characteristics...
September 25, 2017: European Journal of Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/28940963/organocatalyzed-photo-atom-transfer-radical-polymerization-of-methacrylic-acid-in-continuous-flow-and-surface-grafting
#19
Gijs Ramakers, Alexander Krivcov, Vanessa Trouillet, Alexander Welle, Hildegard Möbius, Tanja Junkers
The organocatalyzed photo-atom transfer radical polymerization (photoATRP) using 10-phenylphenothiazine as catalyst is studied toward its use in methacrylic acid (MAA) polymerization and surface grafting. The organocatalyzed photoATRP of methyl methacrylate (MMA) is first optimized for continuous flow synthesis in order to assess the livingness of the polymerization. MMA can be polymerized in batch and in flow; however, conversions are limited by the loss of bromine functionality and hence high conversions have to be traded in with increasing dispersities...
September 21, 2017: Macromolecular Rapid Communications
https://www.readbyqxmd.com/read/28940151/an-investigation-of-the-health-effects-caused-by-exposure-to-arsenic-from-drinking-water-and-coal-combustion-arsenic-exposure-and-metabolism
#20
Binggan Wei, Jiangping Yu, Chang Kong, Hairong Li, Linsheng Yang, Zhiwei Guo, Na Cui, Yajuan Xia, Kegong Wu
Few studies have been conducted to compare arsenic exposure, metabolism, and methylation in populations exposed to arsenic in drinking water and from coal combustion. Therefore, arsenic concentrations in the environment and arsenic speciation in the urine of subjects exposed to arsenic as a consequence of coal combustion in a rural area in Shaanxi province (CCA) and in drinking water in a rural area in Inner Mongolia (DWA) were investigated. The mean arsenic concentrations in drinking water, indoor air, and soil in CCA were 4...
September 23, 2017: Environmental Science and Pollution Research International
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