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https://www.readbyqxmd.com/read/28527388/abiotic-transformation-of-hexabromocyclododecane-by-sulfidated-nanoscale-zerovalent-iron-kinetics-mechanism-and-influencing-factors
#1
Dan Li, Xifen Zhu, Yin Zhong, Weilin Huang, Ping'an Peng
Recent studies showed that sulfidated nanoscale zerovalent iron (S-nZVI) is a better reducing agent than nanoscale zerovalen iron (nZVI) alone for reductive dechlorination of several organic solvents such as trichloroethylene (TCE) due to the catalytic role of iron sulfide (FeS). We measured the rates of transformation of hexabromocyclododecane (HBCD) by S-nZVI and compared them to those by FeS, nZVI, and reduced sulfur species. The results showed that: i) HBCD (20 mg L(-1)) was almost completely transformed by S-nZVI (0...
May 9, 2017: Water Research
https://www.readbyqxmd.com/read/28526765/factors-associated-with-ischemic-stroke-survival-and-recovery-in-older-adults
#2
Divya Thekkethala Winovich, William T Longstreth, Alice M Arnold, Ravi Varadhan, Adina Zeki Al Hazzouri, Mary Cushman, Anne B Newman, Michelle C Odden
BACKGROUND AND PURPOSE: Little is known about factors that predispose older adults to poor recovery after a stroke. In this study, we sought to evaluate prestroke measures of frailty and related factors as markers of vulnerability to poor outcomes after ischemic stroke. METHODS: In participants aged 65 to 99 years with incident ischemic strokes from the Cardiovascular Health Study, we evaluated the association of several risk factors (frailty, frailty components, C-reactive protein, interleukin-6, and cystatin C) assessed before stroke with stroke outcomes of survival, cognitive decline (≥5 points on Modified Mini-Mental State Examination), and activities of daily living decline (increase in limitations)...
May 19, 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/28524706/cachexia-stage-patient-generated-subjective-global-assessment-phase-angle-and-handgrip-strength-in-patients-with-gastrointestinal-cancer
#3
Gislaine Aparecida Ozorio, Katia Barão, Nora Manoukian Forones
The aim of this study was to correlate patients with gastrointestinal cancer, classified according to different stages of cancer cachexia (SCC) as proposed by Fearon, with nutritional assessment tools such as PG-SGA, phase angle (PA), and handgrip strength. One hundred one patients with a mean age of 61.8 ± 12.8 yr, with 58.4% being men were included. 32.6% were malnourished according to the body mass index (BMI). A severe or moderate malnutrition had been diagnosed in 63.3% when assessed using the PG-SGA, 60...
May 19, 2017: Nutrition and Cancer
https://www.readbyqxmd.com/read/28520526/kir3dl1-hl-a-b-subtypes-govern-acute-myelogenous-leukemia-relapse-after-hematopoietic-cell-transplantation
#4
Jeanette E Boudreau, Fabio Giglio, Ted A Gooley, Philip A Stevenson, Jean-Benoît Le Luduec, Brian C Shaffer, Raja Rajalingam, Lihua Hou, Carolyn Katovich Hurley, Harriet Noreen, Elaine F Reed, Neng Yu, Cynthia Vierra-Green, Michael Haagenson, Mari Malkki, Effie W Petersdorf, Stephen Spellman, Katharine C Hsu
Purpose Disease relapse remains a major challenge to successful outcomes in patients who undergo allogeneic hematopoietic cell transplantation (HCT). Donor natural killer (NK) cell alloreactivity in HCT can control leukemic relapse, but capturing alloreactivity in HLA-matched HCT has been elusive. HLA expression on leukemia cells-upregulated in the post-HCT environment-signals for NK cell inhibition via inhibitory killer immunoglobulin-like (KIR) receptors and interrupts their antitumor activity. We hypothesized that varied strengths of inhibition among subtypes of the ubiquitous KIR3DL1 and its cognate ligand, HLA-B, would titrate NK reactivity against acute myelogenous leukemia (AML)...
May 18, 2017: Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology
https://www.readbyqxmd.com/read/28516869/recommendations-for-infectious-disease-screening-in-migrants-to-western-europe-with-inflammatory-arthropathies-before-starting-biologic-agents-results-from-a-multidisciplinary-task-force-of-four-european-societies-sir-ser-simet-semtsi-facing-the-lar
#5
Filippo Bartalesi, Carlo Scirè, Ana Requena-Méndez, Miguel Angel Abad, Dora Buonfrate, Roberto Caporali, Fabrizio Conti, Federico Diaz-Gonzalez, Cruz Fernández-Espartero, Carmen Martinez-Fernandez, Marta Mascarello, Elena Generali, Giovanni Minisola, Aldo Morrone, Jose Muñoz, Patricia Richi, Gariffalia Sakellariou, Joaquin Salas Coronas, Michele Spinicci, Francesco Castelli, Alessandro Bartoloni, Zeno Bisoffi, Francisco Gimenez-Sanchez, Santiago Muñoz-Fernandez, Marco Matucci-Cerinic
OBJECTIVES: Inflammatory arthritis needs infectious disease screening before starting a biologic agent, however, few data are known about migrant patients, who represent a peculiar population which requires a multidisciplinary approach among international health specialists and should also be considered by health authorities. For this reason, the Italian and Spanish Societies of Rheumatology (SIR and SER) and Tropical Medicine (SIMET and SEMTSI) promoted a multidisciplinary task force in order to produce specific recommendations about screening and advices to be considered in migrant patients with inflammatory arthritis candidate to receive biological therapy, according to their geographical origin...
May 8, 2017: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/28514452/isotopic-evidence-of-multiple-controls-on-atmospheric-oxidants-over-climate-transitions
#6
Lei Geng, Lee T Murray, Loretta J Mickley, Pu Lin, Qiang Fu, Andrew J Schauer, Becky Alexander
The abundance of tropospheric oxidants, such as ozone (O3) and hydroxyl (OH) and peroxy radicals (HO2 + RO2), determines the lifetimes of reduced trace gases such as methane and the production of particulate matter important for climate and human health. The response of tropospheric oxidants to climate change is poorly constrained owing to large uncertainties in the degree to which processes that influence oxidants may change with climate and owing to a lack of palaeo-records with which to constrain levels of atmospheric oxidants during past climate transitions...
May 17, 2017: Nature
https://www.readbyqxmd.com/read/28513589/decoding-material-specific-memory-reprocessing-during-sleep-in-humans
#7
M Schönauer, S Alizadeh, H Jamalabadi, A Abraham, A Pawlizki, S Gais
Neuronal learning activity is reactivated during sleep but the dynamics of this reactivation in humans are still poorly understood. Here we use multivariate pattern classification to decode electrical brain activity during sleep and determine what type of images participants had viewed in a preceding learning session. We find significant patterns of learning-related processing during rapid eye movement (REM) and non-REM (NREM) sleep, which are generalizable across subjects. This processing occurs in a cyclic fashion during time windows congruous to critical periods of synaptic plasticity...
May 17, 2017: Nature Communications
https://www.readbyqxmd.com/read/28511814/evaluation-of-the-influence-of-mechanical-activation-on-physical-and-chemical-properties-of-municipal-solid-waste-incineration-sludge
#8
V Caprai, M V A Florea, H J H Brouwers
Despite numerous studies concerning the application of by-products in the construction field, municipal solid waste incineration (MSWI) residues are not widely used as secondary building materials. In some European countries, washing treatment to the full bottom ash (BA) fraction (0-32 mm) is applied, isolating more contaminated particles, smaller than 0.063 mm. Therefore, a MWSI sludge is produced, having a high moisture content, and thus a limited presence of soluble species. In order to enhance its performance as building material, here, dry mechanical activation is applied on MSWI sludge...
May 13, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28504364/mindfulness-meditation-regulates-anterior-insula-activity-during-empathy-for-social-pain
#9
Davide Laneri, Sören Krach, Frieder M Paulus, Philipp Kanske, Verena Schuster, Jens Sommer, Laura Müller-Pinzler
Mindfulness has been shown to reduce stress, promote health, and well-being, as well as to increase compassionate behavior toward others. It reduces distress to one's own painful experiences, going along with altered neural responses, by enhancing self-regulatory processes and decreasing emotional reactivity. In order to investigate if mindfulness similarly reduces distress and neural activations associated with empathy for others' socially painful experiences, which might in the following more strongly motivate prosocial behavior, the present study compared trait, and state effects of long-term mindfulness meditation (LTM) practice...
May 15, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28504153/injectable-hyaluronic-acid-poly-ethylene-glycol-hydrogels-crosslinked-via-strain-promoted-azide-alkyne-cycloaddition-click-reaction
#10
Shuangli Fu, Hui Dong, Xueyi Deng, Renxi Zhuo, Zhenlin Zhong
This paper reports injectable hyaluronic acid (HA)-based hydrogels crosslinked with azide-modified poly(ethylene glycol) (PEG) via the strain-promoted azide-alkyne cycloaddition (SPAAC) between cyclooctyne and azide groups. Cyclooctyne-modified HA (Cyclooctyne-HA) is prepared by the reaction of HA with 2-(aminoethoxy)cyclooctyne. To crosslink the modified HA, quadruply azide-terminated poly(ethylene glycol) (Azide-PEG) is designed and prepared. The mixture of Cyclooctyne-HA and Azide-PEG gelates in a few minutes to form a strong HA-PEG hydrogel...
August 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28504135/a-versatile-method-for-the-surface-tailoring-of-cellulose-nanocrystal-building-blocks-by-acylation-with-functional-vinyl-esters
#11
Jérémie Brand, Gilles Pecastaings, Gilles Sèbe
Herein we propose a versatile method for the surface tailoring of cellulose nanocrystals (CNCs) based on the reactivity of vinyl ester molecules toward the accessible hydroxyl groups located at the surface of the nanoparticles. CNCs produced from wood pulp were acylated in various conditions, with potassium carbonate as catalyst and under microwave activation. The impact of solvent, temperature and reagent concentration on the reaction efficiency and kinetics was then investigated, using vinyl acetate as a model vinyl ester...
August 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28503032/limestone-and-silica-powder-replacements-for-cement-early-age-performance
#12
Dale P Bentz, Chiara F Ferraris, Scott Z Jones, Didier Lootens, Franco Zunino
Developing functional concrete mixtures with less ordinary portland cement (OPC) has been one of the key objectives of the 21(st) century sustainability movement. While the supplies of many alternatives to OPC (such as fly ash or slag) may be limited, those of limestone and silica powders produced by crushing rocks seem virtually endless. The present study examines the chemical and physical influences of these powders on the rheology, hydration, and setting of cement-based materials via experiments and three-dimensional microstructural modeling...
April 2017: Cement & Concrete Composites
https://www.readbyqxmd.com/read/28494940/differentiation-defective-human-induced-pluripotent-stem-cells-reveal%C3%A2-strengths-and-limitations-of-the-teratoma-assay-and-in%C3%A2-vitro-pluripotency-assays
#13
Marga J Bouma, Maarten van Iterson, Bart Janssen, Christine L Mummery, Daniela C F Salvatori, Christian Freund
The ability to form teratomas in vivo containing multiple somatic cell types is regarded as functional evidence of pluripotency for human pluripotent stem cells (hPSCs). Since the Teratoma assay is animal dependent, laborious, and only qualitative, the PluriTest and the hPSC ScoreCard assay have been developed as in vitro alternatives. Here we compared normal hPSCs, induced hPSCs (hiPSCs) with reactivated reprogramming transgenes, and human embryonal carcinoma cells (hECs) in these assays. While normal hPSCs gave rise to typical teratomas, the xenografts of the hECs and the hiPSCs with reactivated reprogramming transgenes were largely undifferentiated and malignant...
May 9, 2017: Stem Cell Reports
https://www.readbyqxmd.com/read/28488836/effects-of-low-load-resistance-exercise-with-blood-flow-restriction-on-intramuscular-hemodynamics-oxygenation-level-and-water-content
#14
Osamu Yanagisawa, Atsuki Fukutani
BACKGROUND: Muscle metabolism during and after low-load blood flow restriction (BFR) exercise should be further investigated to clarify the mechanism by which the exercise leads to muscle hypertrophy, and increases strength and endurance. We aimed to investigate the effects of low-load resistance exercise with BFR on intramuscular hemodynamics, oxygenation level, and water content. METHODS: Seven men performed ankle plantar flexion exercise (120 repetitions, 30% one repetition maximum) using a custom-made device with and without BFR inside a magnetic resonance scanner...
May 9, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28488829/analyzing-the-relationship-between-anthropometric-and-motor-indices-with-basketball-specific-pre-planned-and-non-planned-agility-performances
#15
Miran Pehar, Nedim Sisic, Damir Sekulic, Milan Coh, Ognjen Uljevic, Miodrag Spasic, Ante Krolo, Kemal Idrizovic
BACKGROUND: Although agility is an important quality in basketball, factors associated with basketball specific pre-planned-agility (change-of-direction-speed - CODS) and non- planned-agility (reactive agility - RA) are rarely investigated. The aim of this study was to evaluate relationship between anthropometric and motor indices with basketball-specific CODS and RA in male basketball players of high performance level. METHODS: We tested 88 high-level male basketball players (height: 194...
May 9, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28482657/h2-oxidation-mediated-by-au1-doped-vanadium-oxide-cluster-cation-auv2o5-a-comparative-study-with-auce2o4
#16
Yan Zhang, Zi-Yu Li, Yan-Xia Zhao, Hai-Fang Li, Xun-Lei Ding, Hua-Yong Zhang, Sheng-Gui He
To clarify the relationship between the type of the oxide support and the activity of the gold-doped oxide clusters toward H2 oxidation, a suitable closed-shell system AuV2O5(+) is chosen to have a comparative study with AuCe2O4(+), the first closed-shell cluster that is reactive toward H2 oxidation. The reaction of AuV2O5(+) with H2 was characterized by mass spectrometry and density functional theory calculations. The AuV2O5(+) cluster is reactive toward H2 leading to the major product of V2O5H2(+) (+ Au), whereas the product of AuV2O4(+) (+ H2O) is completely absent in the experiment...
May 16, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28469405/colorimetric-detection-based-on-localised-surface-plasmon-resonance-optical-characteristics-for-the-detection-of-hydrogen-peroxide-using-acacia-gum-stabilised-silver-nanoparticles
#17
Eman Alzahrani
The use of nanoparticles in sensing is attracting the interest of many researchers. The aim of this work was to fabricate Acacia gum-stabilised silver nanoparticles (SNPs) using green chemistry to use them as a highly sensitive and cost-effective localised surface plasmon resonance (LSPR) colorimeter sensor for the determination of reactive oxygen species, such as hydrogen peroxide (H2O2). Silver nanoparticles were fabricated by the reduction of an inorganic precursor silver nitrate solution (AgNO3) using white sugar as the reducing reagent and Acacia gum as the stabilising reagent and a sonication bath to form uniform silver nanoparticles...
2017: Analytical Chemistry Insights
https://www.readbyqxmd.com/read/28467699/ab-initio-excited-state-transient-raman-analysis
#18
Alessio Petrone, David B Williams-Young, David B Lingerfelt, Xiaosong Li
Time-resolved Raman spectroscopy has proven useful for studying the formation of polarons in conjugated polymers, verifying the presence of reactive intermediates in photochemical reactions, investigating non-radiative transitions in the short lifetime of the photo-excited species, and resolving electron-phonon coupling strengths and exciton dissociation in crystalline materials. In this paper, we present an excited state transient Raman analysis protocol, combining ab initio direct molecular dynamics, transient excited state Hessian and excited state non-resonant Raman activities evaluations...
May 3, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28466871/reversal-of-cocaine-associated-synaptic-plasticity-in-prefrontal-cortex
#19
James M Otis, Devin Mueller
Addiction is characterized by abnormalities in prefrontal cortex that are thought to allow drug-associated cues to drive compulsive drug seeking and taking. Identification and reversal of these pathologic neuroadaptations is therefore critical for treatment of addiction. Previous studies using rodents reveal that drugs of abuse cause dendritic spine plasticity in prelimbic medial prefrontal cortex (PL-mPFC) pyramidal neurons, a phenomenon that correlates with the strength of drug-associated memories in vivo...
May 3, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28464888/functional-disability-associated-with-disease-and-quality-of-life-parameters-in-chinese-patients-with-rheumatoid-arthritis
#20
Juan Ji, Lijuan Zhang, Qiuxiang Zhang, Rulan Yin, Ting Fu, Liren Li, Zhifeng Gu
BACKGROUND: As an important outcome measure among rheumatoid arthritis (RA) patients, functional disability may contribute to unemployment, loss of work productivity, and impaired quality of life. However, little is known about the risk factors of functional disability in Chinese RA patients. This study aimed (1) to examine the prevalence of functional disability in Chinese RA patients; (2) to explore factors associated with the health assessment questionnaire-disability index (HAQ-DI)...
May 2, 2017: Health and Quality of Life Outcomes
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