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https://www.readbyqxmd.com/read/28812758/a-metalloporphyrin-based-porous-organic-polymer-as-an-efficient-catalyst-for-the-catalytic-oxidation-of-olefins-and-arylalkanes
#1
Zheng-Dong Ding, Wei Zhu, Tao Li, Rui Shen, Yunxing Li, Zaijun Li, Xuehong Ren, Zhi-Guo Gu
A metalloporphyrin-based porous organic polymer, Mn-PPOP-1, was constructed in high yield via the ketoenamine condensation of robust porphyrin tetraamines (TBPP) with 1,3,5-triformylphloroglucinol. The stable keto-enamine form in the synthesized polymer was unambiguously confirmed by (13)C CP-MAS solid state NMR. Noticeably, besides the high thermal and chemical stability, this material contains both micropores and mesopores, which are favorable for mass transfer in the catalytic application. Mn-PPOP-1 exhibits significantly high catalytic oxidation of olefins and arylalkanes at room temperature...
August 16, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28811930/improved-ct-detection-of-acute-bowel-ischemia-using-frequency-selective-non-linear-image-blending
#2
Sven Schneeweiss, Michael Esser, Wolfgang Thaiss, Hans Boesmueller, Hendrik Ditt, Konstantin Nikolau, Marius Horger
BACKGROUND: Computed tomography (CT) as a fast and reliable diagnostic technique is the imaging modality of choice for acute bowel ischemia. However, diagnostic is often difficult mainly due to low attenuation differences between ischemic and perfused segments. PURPOSE: To compare the diagnostic efficacy of a new post-processing tool based on frequency selective non-linear blending with that of conventional linear contrast-enhanced CT (CECT) image blending for the detection of bowel ischemia...
July 2017: Acta Radiologica Open
https://www.readbyqxmd.com/read/28811630/solid-state-31-p-and-1-h-chemical-mr-micro-imaging-of-hard-tissues-and-biomaterials-with-magic-angle-spinning-at-very-high-magnetic-field
#3
Maxime Yon, Vincent Sarou-Kanian, Ulrich Scheler, Jean-Michel Bouler, Bruno Bujoli, Dominique Massiot, Franck Fayon
In this work, we show that it is possible to overcome the limitations of solid-state MRI for rigid tissues due to large line broadening and short dephasing times by combining Magic Angle Spinning (MAS) with rotating pulsed field gradients. This allows recording ex vivo (31)P 3D and 2D slice-selected images of rigid tissues and related biomaterials at very high magnetic field, with greatly improved signal to noise ratio and spatial resolution when compared to static conditions. Cross-polarization is employed to enhance contrast and to further depict spatially localized chemical variations in reduced experimental time...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28810999/case-report-on-the-use-of-a-custom-myoelectric-elbow-wrist-hand-orthosis-for-the-remediation-of-upper-extremity-paresis-and-loss-of-function-in-chronic-stroke
#4
Stefanie Dunaway, D Brianna Dezsi, Jessica Perkins, Daniel Tran, Jonathan Naft
INTRODUCTION: This case study describes the application of a commercially available, custom myoelectric elbow-wrist-hand orthosis (MEWHO), on a veteran diagnosed with chronic stroke with residual left hemiparesis. The MEWHO provides powered active assistance for elbow flexion/extension and 3 jaw chuck grip. It is a noninvasive orthosis that is driven by the user's electromyographic signal. Experience with the MEWHO and associated outcomes are reported. MATERIALS AND METHODS: The participant completed 21 outpatient occupational therapy sessions that incorporated the use of a custom MEWHO without grasp capability into traditional occupational therapy interventions...
July 2017: Military Medicine
https://www.readbyqxmd.com/read/28809947/high-density-genetic-linkage-map-construction-by-f2-populations-and-qtl-analysis-of-early-maturity-traits-in-upland-cotton-gossypium-hirsutum-l
#5
Libei Li, Shuqi Zhao, Junji Su, Shuli Fan, Chaoyou Pang, Hengling Wei, Hantao Wang, Lijiao Gu, Chi Zhang, Guoyuan Liu, Dingwei Yu, Qibao Liu, Xianlong Zhang, Shuxun Yu
Due to China's rapidly increasing population, the total arable land area has dramatically decreased; as a consequence, the competition for farming land allocated for grain and cotton production has become fierce. Therefore, to overcome the existing contradiction between cotton grain and fiber production and the limited farming land, development of early-maturing cultivars is necessary. In this research, a high-density linkage map of upland cotton was constructed using genotyping by sequencing (GBS) to discover single nucleotide polymorphism (SNP) markers associated with early maturity in 170 F2 individuals derived from a cross between LU28 and ZHONG213...
2017: PloS One
https://www.readbyqxmd.com/read/28807602/neutralization-of-interferon-%C3%AE-reverts-clinical-and-laboratory-features-in-a-mouse-model-of-macrophage-activation-syndrome
#6
Giusi Prencipe, Ivan Caiello, Antonia Pascarella, Alexei A Grom, Claudia Bracaglia, Laurence Chatel, Walter G Ferlin, Emiliano Marasco, Raffaele Strippoli, Cristina de Min, Fabrizio De Benedetti
BACKGROUND: The pathogenesis of macrophage activation syndrome (MAS) is not clearly understood: a large body of evidence supports the involvement of mechanisms similar to those implicated in primary hemophagocytic lymphohistiocytosis. OBJECTIVE: To investigate the pathogenic role of interferon-γ (IFNγ) and the therapeutic efficacy of IFNγ neutralization in an animal model of macrophage activation syndrome. METHODS: We used a MAS model established in mice transgenic for human interleukin-6 (IL-6TG) challenged with LPS (MAS mice)...
August 11, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28807357/development-and-initial-validation-of-the-macrophage-activation-syndrome-primary-hemophagocytic-lymphohistiocytosis-score-a-diagnostic-tool-that-differentiates-primary-hemophagocytic-lymphohistiocytosis-from-macrophage-activation-syndrome
#7
Francesca Minoia, Francesca Bovis, Sergio Davì, Antonella Insalaco, Kai Lehmberg, Susan Shenoi, Sheila Weitzman, Graciela Espada, Yi-Jin Gao, Jordi Anton, Toshiyuki Kitoh, Ozgur Kasapcopur, Helga Sanner, Rosa Merino, Itziar Astigarraga, Maria Alessio, Michael Jeng, Vyacheslav Chasnyk, Kim E Nichols, Zeng Huasong, Caifeng Li, Concetta Micalizzi, Nicolino Ruperto, Alberto Martini, Randy Q Cron, Angelo Ravelli, AnnaCarin Horne
OBJECTIVE: To develop and validate a diagnostic score that assists in discriminating primary hemophagocytic lymphohistiocytosis (pHLH) from macrophage activation syndrome (MAS) related to systemic juvenile idiopathic arthritis. STUDY DESIGN: The clinical, laboratory, and histopathologic features of 362 patients with MAS and 258 patients with pHLH were collected in a multinational collaborative study. Eighty percent of the population was assessed to develop the score and the remaining 20% constituted the validation sample...
August 11, 2017: Journal of Pediatrics
https://www.readbyqxmd.com/read/28802890/is-protein-deuteration-beneficial-for-proton-detected-solid-state-nmr-at-and-above-100%C3%A2-khz-magic-angle-spinning
#8
Diane Cala-De Paepe, Jan Stanek, Kristaps Jaudzems, Kaspars Tars, Loren B Andreas, Guido Pintacuda
(1)H-detection in solid-state NMR of proteins has been traditionally combined with deuteration for both resolution and sensitivity reasons, with the optimal level of proton dilution being dependent on MAS rate. Here we present (1)H-detected (15)N and (13)C CP-HSQC spectra on two microcrystalline samples acquired at 60 and 111 kHz MAS and at ultra-high field. We critically compare the benefits of three labeling schemes yielding different levels of proton content in terms of resolution, coherence lifetimes and feasibility of scalar-based 2D correlations under these experimental conditions...
July 25, 2017: Solid State Nuclear Magnetic Resonance
https://www.readbyqxmd.com/read/28801681/nrf1-and-zscan10-bind-to-the-promoter-region-of-the-six1-gene-and-their-effects-body-measurements-in-qinchuan-cattle
#9
Da-Wei Wei, Lin-Sheng Gui, Sayed Haidar Abbas Raza, Song Zhang, Rajwali Khan, Li Wang, Hong-Fang Guo, Lin-Sen Zan
The SIX1 homeobox gene belongs to the six homeodomain family and is widely thought to play a principal role in mediating of skeletal muscle development. In the present study, we determined that the bovine SIX1 gene was highly expressed in the longissimus thoracis and physiologically immature individuals. DNA sequencing of 428 individual Qinchuan cattle identified nine single nucleotide polymorphisms (SNPs) in the promoter region of the SIX1 gene. Using a series of 5' deletion promoter plasmid luciferase reporter assays and 5'-rapid amplification of cDNA end analysis (RACE), two of these SNPs were found to be located in the proximal minimal promoter region -216/-28 relative to the transcriptional start site (TSS)...
August 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28800951/evaluation-of-a-high-concentrated-contrast-media-injection-protocol-in-combination-with-low-tube-current-for-dose-reduction-in-coronary-computed-tomography-angiography-a-randomized-two-center-prospective-study
#10
Yibo Sun, Yanqing Hua, Mingpeng Wang, Dingbiao Mao, Xiu Jin, Cheng Li, Kailei Shi, Jianrong Xu
RATIONALE AND OBJECTIVES: The study aimed to prospectively evaluate the radiation dose reduction potential and image quality (IQ) of a high-concentration contrast media (HCCM) injection protocol in combination with a low tube current (mAs) in coronary computed tomography angiography. MATERIALS AND METHODS: Eighty-one consecutive patients (mean age: 62 years; 34 females; body mass index: 18-31) were included and randomized-assigned into two groups. All computed tomography (CT) examinations were performed in two groups with the same tube voltage (100 kV), flow rate of contrast medium (5...
August 8, 2017: Academic Radiology
https://www.readbyqxmd.com/read/28799161/performance-factors-in-a-mountain-ultramarathon
#11
Pascal Balducci, Michel Clémençon, Robin Trama, Yoann Blache, Christophe Hautier
This study aimed to determine mountain ultra-marathon (MUM) performance factors in a large group of endurance mountain runners. Maximal aerobic speed (MAS) was assessed one week prior to the MUM. The level and graded (10%) energy cost of running, stiffness, knee extensors force (KEf), and jump height on a counter movement jump (CMJ) were measured in 24 male ultra runners before (pre) and immediately after (post) the Interlacs Trail (75 km and 3 930/3 700 m d+/d-). Performance time was correlated with MAS (r=- 0...
August 10, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28798983/role-of-aqp9-in-transport-of-monomethyselenic-acid-and-selenite
#12
Xiangrong Geng, Joseph McDermott, Joseph Lundgren, Liu Liu, Kan-Jen Tsai, Jian Shen, Zijuan Liu
AQP9 is an aquaglyceroporin with a very broad substrate spectrum. In addition to its orthodox nutrient substrates, AQP9 also transports multiple neutral and ionic arsenic species including arsenic trioxide, monomethylarsenous acid (MAs(III)) and dimethylarsenic acid (DMA(V)). Here we discovered a new group of AQP9 substrates which includes two clinical relevant selenium species. We showed that AQP9 efficiently transports monomethylselenic acid (MSeA) with a preference for acidic pH, which has been demonstrated in Xenopus laevis oocyte following the overexpression of human AQP9...
August 10, 2017: Biometals: An International Journal on the Role of Metal Ions in Biology, Biochemistry, and Medicine
https://www.readbyqxmd.com/read/28797926/accurate-determination-of-chemical-shift-tensor-orientations-of-single-crystals-by-solid-state-magic-angle-spinning-nmr
#13
Yamini S Avadhut, Johannes Weber, Jörn Schmedt Auf der Günne
An improved implementation of single-crystal magic-angle-spinning (MAS) NMR is presented which gives access to chemical shift tensors both in orientation (relative to the crystal axis system) and principal axis values. For mounting arbitrary crystals inside ordinary MAS rotors, a mounting tool is described which allows to relate the crystal orientation determined by diffraction techniques to the rotor coordinate system. The crystal is finally mounted into a MAS rotor equipped with a special insert which allows a defined reorientation of the single-crystal by 90°...
July 24, 2017: Journal of Magnetic Resonance
https://www.readbyqxmd.com/read/28795429/comparison-of-image-intensity-local-and-multi-atlas-priors-in-brain-tissue-classification
#14
Liping Wang, Frédéric Labrosse, Reyer Zwiggelaar
PURPOSE: Automated and accurate tissue classification in 3D brain Magnetic Resonance images is essential in volumetric morphometry or as a preprocessing step for diagnosing brain diseases. However, noise, intensity inhomogeneity and partial volume effects limit the classification accuracy of existing methods. This paper provides a comparative study on the contributions of three commonly used image information priors for tissue classification in normal brains: image intensity, local and multi-atlas priors...
August 10, 2017: Medical Physics
https://www.readbyqxmd.com/read/28795061/a-multi-agent-based-approach-for-prehospital-emergency-management
#15
Reza Safdari, Jaleh Shoshtarian Malak, Niloofar Mohammadzadeh, Azimeh Danesh Shahraki
OBJECTIVE: To demonstrate an architecture to automate the prehospital emergency process to categorize the specialized care according to the situation at the right time for reducing the patient mortality and morbidity. METHODS: Prehospital emergency process were analyzed using existing prehospital management systems, frameworks and the extracted process were modeled using sequence diagram in Rational Rose software. System main agents were identified and modeled via component diagram, considering the main system actors and by logically dividing business functionalities, finally the conceptual architecture for prehospital emergency management was proposed...
July 2017: Bulletin of Emergency and Trauma
https://www.readbyqxmd.com/read/28793392/placental-lesions-in-meconium-aspiration-syndrome
#16
Binnari Kim, Soo-Young Oh, Jung-Sun Kim
Background: Meconium aspiration syndrome (MAS) is defined by respiratory distress requiring supplemental oxygen in a meconium-stained neonate. MAS is clinically subclassified as mild, moderate, and severe according to the oxygen requirement. The aims of this study were to compare the histological findings in the placentas of MAS neonates with those of meconium-stained but non-MAS neonates and to analyze the correlation between the severity of MAS and the grade of its histological parameters...
August 9, 2017: Journal of Pathology and Translational Medicine
https://www.readbyqxmd.com/read/28793098/effects-of-supportive-telephone-counseling-in-the-metabolic-control-of-elderly-people-with-diabetes-mellitus
#17
Tânia Alves Canata Becker, Carla Regina de Souza Teixeira, Maria Lúcia Zanetti, Ana Emília Pace, Fábio Araújo Almeida, Maria Teresa da Costa Gonçalves Torquato
Objective: the purpose of this study was to evaluate the efficacy of telephone-based support for the metabolic control of elderly patients with diabetes mellitus. Method: a pragmatic study was conducted in two groups, called G1 (n=36) and G2 (n=27), at a health unit from the countryside of São Paulo state. Patients in G1 group received telephone support over four months, through 16 telephone contacts with educational material; for the G2 group the educational material was mailed...
July 2017: Revista Brasileira de Enfermagem
https://www.readbyqxmd.com/read/28793044/reproducibility-and-reliability-of-qtc-and-qtcd-measurements-and-their-relationships-with-left-ventricular-hypertrophy-in-hemodialysis-patients
#18
Maria Angélica Gonçalves Alonso, Valentine de Almeida Costa de Castro Lima, Maria Angela Magalhães de Queiroz Carreira, Jocemir Ronaldo Lugon
Background: Left ventricular hypertrophy (LVH) is very common in hemodialysis patients and an independent risk factor for mortality in this population. The myocardial remodeling underlying the LVH can affect ventricular repolarization causing abnormalities in QT interval. Objective: to evaluate the reproducibility and reliability of measurements of corrected QT interval (QTc) and its dispersion (QTcd) and correlate these parameters with LVH in hemodialysis patients...
August 7, 2017: Arquivos Brasileiros de Cardiologia
https://www.readbyqxmd.com/read/28792585/centrally-mediated-late-motor-recovery-after-botulinum-toxin-injection-case-reports-and-a-review-of-current-evidence
#19
Manuel F Mas, Sheng Li, Gerard E Francisco
OBJECTIVE: Botulinum neurotoxin is commonly utilized in neurorehabilitation as a treatment for focal spasticity. Clinical experience has yielded observations of late motor recovery after intramuscular injection of botulinum neurotoxin, that are not readily explained by the classical mechanism of action of the neurotoxin in controlling spasticity. These findings have triggered speculation regarding a botulinum neurotoxin mediated effect at the central level after peripheral intervention...
August 9, 2017: Journal of Rehabilitation Medicine
https://www.readbyqxmd.com/read/28792214/aggregation-and-fibril-structure-of-a%C3%AE-m01-42-and-a%C3%AE-1-42
#20
Robert Silvers, Michael T Colvin, Kendra K Frederick, Angela C Jacavone, Susan L Lindquist, Sara Linse, Robert G Griffin
A mechanistic understanding of Aβ aggregation and high-resolution structures of Aβ fibrils and oligomers are vital to elucidating relevant details of neurodegeneration in Alzheimer's disease, which will facilitate the rational design of diagnostic and therapeutic protocols. The most detailed and reproducible insights into the structure and kinetics of have been achieved using recombinant Aβ peptides produced by direct expression, which results in the addition of a methionine on the N-terminus. While the length of the C-terminus is well established to have a profound impact on the peptide's aggregation propensity, structure, and neurotoxicity, the impact of the N-terminal methionine on the aggregation pathways, and structure is unclear...
August 9, 2017: Biochemistry
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