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https://www.readbyqxmd.com/read/27910601/combined-scanning-probe-microscopy-and-x-ray-scattering-instrument-for-in-situ-catalysis-investigations
#1
Willem G Onderwaater, Peter C van der Tuijn, Rik V Mom, Matthijs A van Spronsen, Sander B Roobol, Amirmehdi Saedi, Jakub Drnec, Helena Isern, Francesco Carla, Thomas Dufrane, Raymond Koehler, Bert Crama, Irene M N Groot, Roberto Felici, Joost W M Frenken
We have developed a new instrument combining a scanning probe microscope (SPM) and an X-ray scattering platform for ambient-pressure catalysis studies. The two instruments are integrated with a flow reactor and an ultra-high vacuum system that can be mounted easily on the diffractometer at a synchrotron end station. This makes it possible to perform SPM and X-ray scattering experiments in the same instrument under identical conditions that are relevant for catalysis.
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27908444/clinical-application-of-apparent-diffusion-coefficient-mapping-in-voxel-based-morphometry-in-the-diagnosis-of-alzheimer-s-disease
#2
H Takahashi, K Ishii, N Kashiwagi, Y Watanabe, H Tanaka, T Murakami, N Tomiyama
AIM: To evaluate the performance of apparent diffusion coefficient (ADC) mapping compared with voxel-based morphometry and to demonstrate the clinical usefulness of ADC mapping in the diagnosis of Alzheimer's disease (AD). MATERIALS AND METHODS: The study population comprised 31 patients with AD (group A) and 24 patients without dementia (group B) who underwent three-dimensional (3D) T1-weighted imaging (WI) and two-dimensional (2D) echo-planar diffusion-weighted imaging (DWI) at 3 T...
November 28, 2016: Clinical Radiology
https://www.readbyqxmd.com/read/27900929/main-effects-and-interactions-of-cerebral-hemispheres-gender-and-age-in-the-calculation-of-volumes-and-asymmetries-of-selected-structures-of-episodic-memory
#3
Rocio Ramirez-Carmona, Haydee Guadalupe Garcia-Lazaro, Brenda Dominguez-Corrales, Erika Aguilar-Castañeda, Ernesto Roldan-Valadez
The aim of this study was to clarify the influence of anatomical (cerebral hemisphere) and demographic (age and gender) variables on the gray matter (GM) volumes and volumetric asymmetry indices (VAIs) of selected structures involved in episodic memory. A cross-sectional study was performed in 47 healthy volunteers. Neuropsychological evaluation revealed similar IQs across the sample. Using SPM-based software, brain segmentation, labeling and volume measurements of the hippocampus, amygdala, middle temporal gyrus and parahippocampal gyrus were performed in each cerebral hemisphere...
November 30, 2016: Functional Neurology
https://www.readbyqxmd.com/read/27898202/optimization-of-transcutaneous-vagus-nerve-stimulation-using-functional-mri
#4
Natalia Yakunina, Sam Soo Kim, Eui-Cheol Nam
OBJECTIVE/HYPOTHESIS: Vagus nerve stimulation (VNS) is an established therapy for drug-resistant epilepsy, depression, and a number of other disorders. Transcutaneous stimulation of the auricular branch of the vagus nerve (tVNS) has been considered as a non-invasive alternative. Several functional magnetic resonance imaging (fMRI) studies on the effects of tVNS used different stimulation parameters and locations in the ear, which makes it difficult to determine the optimal tVNS methodology...
November 29, 2016: Neuromodulation: Journal of the International Neuromodulation Society
https://www.readbyqxmd.com/read/27897987/atmospheric-correction-of-satellite-gf-1-wfv-imagery-and-quantitative-estimation-of-suspended-particulate-matter-in-the-yangtze-estuary
#5
Pei Shang, Fang Shen
The Multispectral Wide Field of View (WFV) camera on the Chinese GF-1 satellite, launched in 2013, has advantages of high spatial resolution (16 m), short revisit period (4 days) and wide scene swath (800 km) compared to the Landsat-8/OLI, which make it an ideal means of monitoring spatial-temporal changes of Suspended Particulate Matter (SPM) in large estuaries like the Yangtze Estuary. However, a lack of proper atmospheric correction methods has limited its application in water quality assessment. We propose an atmospheric correction method based on a look up table coupled by the atmosphere radiative transfer model (6S) and the water semi-empirical radiative transfer (SERT) model for inversion of water-leaving reflectance from GF-1 top-of-atmosphere radiance, and then retrieving SPM concentration from water-leaving radiance reflectance of the Yangtze Estuary and its adjacent sea...
November 25, 2016: Sensors
https://www.readbyqxmd.com/read/27893588/suite-pet-ct-neuroimaging-for-the-diagnosis-of-parkinson-s-disease-statistical-parametric-mapping-analysis
#6
Ruimin Wang, Baixuan Xu, Zhe Guo, Tong Chen, Jinming Zhang, Yingmao Chen, Haiyan Zhu
OBJECTIVES: The aim of this study was to investigate the topographical distribution of dopamine transporter (DAT), dopamine D2 receptor, and glucose metabolism in Parkinson's disease (PD) using PET/computed tomography (CT) scanning and statistical parametric mapping (SPM) analysis. PARTICIPANTS AND METHODS: Seventy-four patients (58 PD patients and 16 normal controls) underwent DAT, D2 receptor, and glucose brain PET/CT scans using C-methyl-N-2-β-carbomethoxy-3-β-(4-fluorophenyl) tropane (C-β-CFT), C-raclopride (C-RAC), and fluorine-18-fluorodeoxyglucose (F-FDG) radiotracers for the respective scans...
November 28, 2016: Nuclear Medicine Communications
https://www.readbyqxmd.com/read/27891442/a-retrospective-evaluation-of-clinical-profile-of-second-primary-head-and-neck-cancer
#7
Paramjeet Kaur, Nupur Bansal, J Vijaya Kumar, Anil Khurana, Ashok Chauhan
INTRODUCTION: Incidence of Second Primary Malignancy (SPM) after successful treatment of primary is increasing and may cause the problem for optimal treatment. AIM: This study was conducted retrospectively to analyse incidence, disease free survival between malignancies, pattern of treatment and outcome. MATERIALS AND METHODS: Sixteen out of 22 patients of previously treated cases of head and neck cancer those develop SPM of head and neck region managed over a period of January 2012 to December 2015 in Department of Radiotherapy-II, Pt...
October 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27890695/nitric-oxide-polyamines-cross-talk-during-dormancy-release-and-germination-of-apple-embryos
#8
Urszula Krasuska, Katarzyna Ciacka, Agnieszka Gniazdowska
Nitric oxide (NO) and polyamines (PAs) belong to plant growth and development regulators. These compounds play a key role in numerous physiological processes e.g. seed germination. Based on the suggestion of overlapping of NO and PAs biosynthetic pathways, we demonstrated a cross-talk of NO and PAs in regulation of embryonic dormancy release. The aim of the work was to investigate an impact of PAs (Put, Spd and Spm) or NO short-term fumigation on nitrite, urea, Arg and ornithine (Orn) content, NO synthase-like (NOS-like) and arginase activity in axes of apple (Malus domestica Borkh...
November 23, 2016: Nitric Oxide: Biology and Chemistry
https://www.readbyqxmd.com/read/27890345/prenatal-exposure-to-outdoor-air-pollution-and-child-behavioral-problems-at-school-age-in-japan
#9
Takashi Yorifuji, Saori Kashima, Midory Higa Diez, Yoko Kado, Satoshi Sanada, Hiroyuki Doi
INTRODUCTION: Recent studies suggest positive associations between prenatal exposure to ambient air pollution and neurodevelopment of children, but evidence on the adverse effects of exposure to air pollution on child neurobehavioral development remains limited. We thus examined associations between prenatal exposure to outdoor air pollution and child behavioral problems at school age, using data from a nationwide population-based longitudinal survey in Japan, where participants were recruited in 2001 and are continuously followed...
November 24, 2016: Environment International
https://www.readbyqxmd.com/read/27885058/association-between-human-immunodeficiency-virus-infection-and-arterial-stiffness-in-children
#10
Justin S Kuilder, Nikmah S Idris, Diederick E Grobbee, Michiel L Bots, Michael Mh Cheung, David Burgner, Nia Kurniati, Cuno Spm Uiterwaal
BACKGROUND: Human immunodeficiency virus infection (HIV) is associated with increased cardiovascular risk and adverse cardiovascular outcome in adults. Early recognition of changes in vascular properties might prove essential in cardiovascular prevention in HIV-infected patients. We investigated the relations between HIV infection and arterial stiffness in children. METHODS: This cross-sectional study included 51 HIV-infected and 52 healthy children (age 3.2-14...
November 24, 2016: European Journal of Preventive Cardiology
https://www.readbyqxmd.com/read/27882088/study-on-the-resistance-mechanism-via-outer-membrane-protein-oprd2-and-metal-%C3%AE-lactamase-expression-in-the-cell-wall-of-pseudomonas-aeruginosa
#11
Shuangqi Cai, Yiqiang Chen, Dezhi Song, Jinliang Kong, Yanbin Wu, Huasong Lu
The aim of the present study was to evaluate the imipenem-resistant mechanism via the outer membrane protein (OMP) OprD2 and metal β-lactamase expression in the cell wall of Pseudomonas aeruginosa. The Pseudomonas aeruginosa was clinically separated and validated by VITEK-2 full-automatic bacteria analyzer. Drug resistance, sensitive antibiotics and minimum inhibitory concentration (MIC) were tested using the drug sensitivity analysis system. The phenotype positive strains of MBL genes were screened using the Kirby-Bauer diffusion method by adding metal ion-chelating agent EDTA on the imipenem susceptibility paper...
November 2016: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/27881948/reproducibility-and-bias-in-healthy-brain-segmentation-comparison-of-two-popular-neuroimaging-platforms
#12
Dana L Tudorascu, Helmet T Karim, Jacob M Maronge, Lea Alhilali, Saeed Fakhran, Howard J Aizenstein, John Muschelli, Ciprian M Crainiceanu
We evaluated and compared the performance of two popular neuroimaging processing platforms: Statistical Parametric Mapping (SPM) and FMRIB Software Library (FSL). We focused on comparing brain segmentations using Kirby21, a magnetic resonance imaging (MRI) replication study with 21 subjects and two scans per subject conducted only a few hours apart. We tested within- and between-platform segmentation reliability both at the whole brain and in 10 regions of interest (ROIs). For a range of fixed probability thresholds we found no differences between-scans within-platform, but large differences between-platforms...
2016: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/27876654/fast-bayesian-whole-brain-fmri-analysis-with-spatial-3d-priors
#13
Per Sidén, Anders Eklund, David Bolin, Mattias Villani
Spatial whole-brain Bayesian modeling of task-related functional magnetic resonance imaging (fMRI) is a great computational challenge. Most of the currently proposed methods therefore do inference in subregions of the brain separately or do approximate inference without comparison to the true posterior distribution. A popular such method, which is now the standard method for Bayesian single subject analysis in the SPM software, is introduced in Penny et al. (2005b). The method processes the data slice-by-slice and uses an approximate variational Bayes (VB) estimation algorithm that enforces posterior independence between activity coefficients in different voxels...
November 19, 2016: NeuroImage
https://www.readbyqxmd.com/read/27864218/second-primary-malignancies-in-multiple-myeloma-an-overview-and-imwg-consensus
#14
REVIEW
P Musto, K C Anderson, M Attal, P G Richardson, A Badros, J Hou, R Comenzo, J Du, B G M Durie, J San Miguel, H Einsele, W M Chen, L Garderet, G Pietrantuono, J Hillengass, R A Kyle, P Moreau, J J Lahuerta, O Landgren, H Ludwig, A Larocca, A Mahindra, M Cavo, A Mazumder, P L McCarthy, A Nouel, S V Rajkumar, A Reiman, E R Serra, O Sezer, E Terpos, I Turesson, S Usmani, B M Weiss, A Palumbo
BACKGROUND: Therapeutic advancements following the introduction of autologous stem cell transplantation and 'novel' agents have significantly improved clinical outcomes for patients with multiple myeloma (MM). Increased life expectancy, however, has led to renewed concerns about the long-term risk of second primary malignancies (SPMs). This review outlines the most up-to-date knowledge of possible host-, disease-, and treatment-related risk factors for the development of SPMs in patients with MM, and provides practical recommendations to assist physicians...
November 17, 2016: Annals of Oncology: Official Journal of the European Society for Medical Oncology
https://www.readbyqxmd.com/read/27861168/nanosculpting-of-complex-oxides-by-massive-ionic-transfer
#15
Daehee Seol, Stephen Jesse, Sang-Joon Park, Woo Lee, Sergei V Kalinin, Yunseok Kim
Scanning probe microscopy (SPM)-based approaches have been extensively studied as methods to control the structure and properties of materials on the nanoscale. In many cases, the SPM probe is physically utilized to control structure and properties. In addition to physical modulation, it has been reported that voltage can be effectively used to modulate electrochemical phenomena on the sample surface. These studies suggest that electrochemical modulation of the structure and properties is possible by applying a voltage...
December 16, 2016: Nanotechnology
https://www.readbyqxmd.com/read/27860411/secondary-primary-malignancies-during-the-lenalidomide-dexamethasone-regimen-in-relapsed-refractory-multiple-myeloma-patients
#16
Rouslan Kotchetkov, Esther Masih-Khan, Chia-Min Chu, Eshetu G Atenafu, Christine Chen, Vishal Kukreti, Suzanne Trudel, Rodger Tiedemann, Donna E Reece
Lenalidomide in combination with dexamethasone (Len-dex) represents a highly effective treatment in relapsed/refractory multiple myeloma (RRMM) patients. However, an increased risk of secondary primary malignancies (SPMs), including myelodysplastic syndrome (MDS) and acute myelogenous leukemia (AML) has been described in patients receiving lenalidomide. In order to assess the incidence and features of this complication, we reviewed 195 patients with RRMM treated with Len-dex at our institution. The median follow-up time from diagnosis of MM was 73 months (10-234 months) and from initiation of Len-dex was 19 months (1-104 months)...
November 18, 2016: Cancer Medicine
https://www.readbyqxmd.com/read/27856808/adult-derived-genetic-blood-pressure-scores-and-blood-pressure-measured-in-different-body-postures-in-young-children
#17
Maria Ac Jansen, Geertje W Dalmeijer, Frank Lj Visseren, Cornelis K van der Ent, Maarten Leusink, N Charlotte Onland-Moret, Anke H Maitland-van der Zee, Diederick E Grobbee, Cuno Spm Uiterwaal
AIMS: Several genes are related to blood pressure (BP) levels in adults, but it is largely unknown whether these genes also determine BP early in life. METHODS: Systolic BP (SBP) and diastolic BP (DBP) were measured in 720 5-year-old children from the WHeezing-Illnesses-STudy-LEidsche-Rijn (WHISTLER) birth cohort in sitting and supine positions using a semi-automatic oscillometric device. Illumina chip technology was used to genotype 18, 19, 11 and 12 single nucleotide polymorphisms associated with adult SBP, DBP, mean arterial pressure (MAP) and hypertension, respectively, in the children's DNA and separate weighted genetic risk scores (GRSs) were constructed...
November 17, 2016: European Journal of Preventive Cardiology
https://www.readbyqxmd.com/read/27856335/examining-the-impact-of-grape-consumption-on-brain-metabolism-and-cognitive-function-in-patients-with-mild-decline-in-cognition-adouble-blinded-placebo-controlled-pilot-study
#18
Jooyeon Lee, Nare Torosyan, Daniel H Silverman
BACKGROUND: Natural compounds in grapes such as resveratrol are known for their antioxidant and anti-inflammatory properties. Some studies have shown a potential role for grapes or wine in slowing cognitive decline and other effects of aging. However, well-controlled experimental data obtained in human subjects are still in need of further development. Here we aimed to systemically assess effects of grapes on regional cerebral metabolism. METHODS: Ten subjects with mild decline in cognition (mean, 72...
November 14, 2016: Experimental Gerontology
https://www.readbyqxmd.com/read/27851867/physiological-basis-of-vascular-autocalibration-vasa-comparison-to-hypercapnia-calibration-methods
#19
Samira M Kazan, Laurentius Huber, Guillaume Flandin, Dimo Ivanov, Peter Bandettini, Nikolaus Weiskopf
PURPOSE: The statistical power of functional MRI (fMRI) group studies is significantly hampered by high intersubject spatial and magnitude variance. We recently presented a vascular autocalibration method (VasA) to account for vascularization differences between subjects and hence improve the sensitivity in group studies. Here, we validate the novel calibration method by means of direct comparisons of VasA with more established measures of baseline venous blood volume (and indirectly vascular reactivity), the M-value...
November 9, 2016: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/27842965/influence-of-the-natural-colloids-on-the-multi-phase-distributions-of-antibiotics-in-the-surface-water-from-the-largest-lake-in-north-china
#20
Dengmiao Cheng, Xinhui Liu, Shengnan Zhao, Baoshan Cui, Junhong Bai, Zhaojun Li
Understanding antibiotic adsorption on natural colloids is crucial for prediction of the behavior, bioavailability and toxicity of antibiotics in natural waters. In the present study, the filtered water (dissolved phase, <0.7μm) was further separated into colloidal phase (1kDa-0.7μm) and soluble phase (<1kDa) by cross-flow ultrafiltration (CFUF), and the spatial-temporal variation and distribution of six antibiotics in multi-phases were investigated in Baiyangdian Lake. Results indicated that antibiotic concentrations differed significantly with sampling location and time...
November 11, 2016: Science of the Total Environment
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