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https://www.readbyqxmd.com/read/28343346/molecularly-imprinted-polymer-prepared-with-polyhedral-oligomeric-silsesquioxane-through-reversible-addition-fragmentation-chain-transfer-polymerization
#1
Shu-Ping Gao, Xue Zhang, Li-Shun Zhang, Yan-Ping Huang, Zhao-Sheng Liu
Polyhedral oligomeric silsesquioxane (POSS) was utilized to prepare imprinted polymer through reversible addition-fragmentation chain transfer polymerization (RAFT) successfully. The imprinted polymer was made with a mixture of RAFT agent, 4-vinylpyridine (4-VP), POSS monomer [PSS-(1-propylmethacrylate)-heptaisobutyl substituted, MA 0702], and ethylene glycol dimethacrylate (EDMA), with ketoprofen (KET) as template. The influence of polymerization variables, the amount of RAFT agent and POSS monomer, the ratio of KET to 4-VP, and the ratio of 4-VP to EDMA, were investigated on the retention factor and imprinting effect...
March 25, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28343132/probing-polarity-of-flame-retardants-and-correlating-with-interaction-between-flame-retardants-and-pet-fiber
#2
Shuo Chang, Xiang Zhou, Zhiqi Xing, Tianmin Tu
The empirical polarity parameter ET(30) was determined for polyethylene terephthalate (PET) fiber and five phosphorus flame retardants by UV-Vis absorption spectrum of solvatochromic probe. To investigate the interaction between flame retardant and PET fiber during the finishing process, the partition coefficients K of these flame retardants between water and PET fiber were determined and an interesting linear relationship between lnK and ET(30) of the flame retardants was obtained, suggesting ET(30) is definitely an excellent estimation of the interaction of flame retardants with PET...
March 11, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28343036/behaviour-of-137-cs-in-forest-humus-detected-across-the-territory-of-the-czech-republic
#3
Jan Škrkal, Helena Pilátová, Petr Rulík, Ivan Suchara, Julie Sucharová, Marie Holá
The activity concentration of (137)Cs in samples of coniferous forest humus collected across the territory of the Czech Republic in 1995 and 2005 was analysed, and it was found significantly correlated with the surface deposition caused by the Chernobyl accident. The effective (12.8 y) and environmental (22.3 y) half-lives of radiocaesium in humus were calculated and compared with those in spruce bark. The impact of important forest stand factors, that is, precipitation, content of organic matter, age of trees and pH, on the behaviour of (137)Cs in humus was studied...
March 22, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28342709/transitioning-from-pediatric-to-adult-care-after-thoracic-transplantation
#4
Adam Putschoegl, Anne I Dipchand, Heather Ross, Cecilia Chaparro, Jonathan N Johnson
With improving outcomes after thoracic transplantation, more children are surviving to adulthood and requiring specialized adult care. A systematic and effective program is essential to transition these patients from a pediatric to adult health care setting. In this review, we discuss the concept of transition and the factors leading to an effective transfer to an adult care provider, including administrative support, patient/provider preparation, and the navigation of potential barriers. Notably, there is a paucity of data for many details of transition, making this a significant opportunity for future research...
February 28, 2017: Journal of Heart and Lung Transplantation
https://www.readbyqxmd.com/read/28342354/integrated-ion-imprinted-polymers-paper-composites-for-selective-and-sensitive-detection-of-cd-ii-ions
#5
Kai Huang, Ying Chen, Feng Zhou, Xiaoya Zhao, Jiafa Liu, Surong Mei, Yikai Zhou, Tao Jing
Paper-based sensor is a new alternative technology to develop a portable, low-cost, and rapid analysis system in environmental chemistry. In this study, ion imprinted polymers (IIPs) using cadmium ions as the template were directly grafted on the surface of low-cost print paper based on the reversible addition-fragmentation chain transfer polymerization. It can be applied as a recognition element to selectively capture the target ions in the complex samples. The maximum adsorption capacity of IIPs composites was 155...
March 18, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28342351/the-impact-of-well-field-configuration-and-permeability-heterogeneity-on-contaminant-mass-removal-and-plume-persistence
#6
Zhilin Guo, Mark L Brusseau
The purpose of this study is to investigate the effects of well-field hydraulics and permeability heterogeneity on mass-removal efficiency for systems comprising large groundwater contaminant plumes. A three-dimensional (3D) numerical model was used to simulate the impact of different well-field configurations on pump-and-treat mass removal for heterogeneous domains. The relationship between reduction in contaminant mass discharge (CMDR) and mass removal (MR) was used as the metric to examine remediation efficiency...
March 8, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28342308/shape-selective-catalysis-and-surface-enhanced-raman-scattering-studies-using-ag-nanocubes-nanospheres-and-aggregated-anisotropic-nanostructures
#7
Subrata Kundu, Wei Dai, Yunyun Chen, Lian Ma, Yuan Yue, Alexander M Sinyukov, Hong Liang
Three morphologies of silver nanoparticles (Ag NPs) such as nanocubes, aggregated anisotropic Ag NPs, and nanospheres were prepared using polystyrene sulfonate (PSS) and citrate as stabilizing agents utilizing a simple wet-chemical and microwave heating route respectively. Ag nanocubes were prepared within one min through microwave heating whereas anisotropic Ag NPs and spherical Ag NPs via 5 and 30min of normal stirring at room temperature (RT) respectively. The shape effect of three different morphologies of Ag NPs were examined in catalysis reaction and in surface enhanced Raman scattering (SERS) studies...
March 16, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28340362/studies-on-neutron-spectrum-characterization-for-the-pneumatic-fast-transfer-system-pfts-of-kamini-reactor
#8
G V S Ashok Kumar, Sujoy Sen, E Radha, J S Brahmaji Rao, R Acharya, R Kumar, C R Venkatasubramani, A V R Reddy, M Joseph
Characterization of neutron energy spectrum along with the determination of sub-cadmium to epithermal neutron flux ratio (f) and the epithermal neutron flux shape factor (α) has been carried out at pneumatic fast transfer system (PFTS) of KAMINI reactor. The facility has been extensively used for the neutron activation analysis (NAA) studies using both k0-NAA and relative method. This paper describes the multi-foil activation method to determine the reaction rates followed by the generation of computed guess spectrum to unfold the neutron spectrum using least square minimization approach...
March 11, 2017: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/28339853/prosurvival-effect-of-cumulus-prostaglandin-g-h-synthase-2-prostaglandin2-signaling-on-bovine-blastocyst-impact-on-in-vivo-posthatching-development%C3%A2
#9
Fabienne Nuttinck, Alice Jouneau, Gilles Charpigny, Isabelle Hue, Christophe Richard, Pierre Adenot, Sylvie Ruffini, Ludivine Laffont, Martine Chebrout, Véronique Duranthon, Brigitte Marquant-Le Guienne
Apoptotic activity is a common physiological process which culminates at the blastocyst stage in the preimplantation embryo of many mammals. The degree of embryonic cell death can be influenced by the oocyte microenvironment. However, the prognostic significance of the incidence of apoptosis remains undefined. Prostaglandin E2 (PGE2) derived from prostaglandin G/H synthase-2 (PTGS2) activity is a well-known prosurvival factor that is mainly studied in oncology. PGE2 is the predominant PTGS2-derived prostaglandin present in the oocyte microenvironment during the periconceptional period...
March 7, 2017: Biology of Reproduction
https://www.readbyqxmd.com/read/28339767/accounting-for-overdispersion-when-determining-primary-care-outliers-for-the-identification-of-chronic-kidney-disease-learning-from-the-national-chronic-kidney-disease-audit
#10
Lois G Kim, Ben Caplin, Faye Cleary, Sally A Hull, Kathryn Griffith, David C Wheeler, Dorothea Nitsch
Background.: Early diagnosis of chronic kidney disease (CKD) facilitates best management in primary care. Testing coverage of those at risk and translation into subsequent diagnostic coding will impact on observed CKD prevalence. Using initial data from 915 general practitioner (GP) practices taking part in a UK national audit, we seek to apply appropriate methods to identify outlying practices in terms of CKD stages 3-5 prevalence and diagnostic coding. Methods.: We estimate expected numbers of CKD stages 3-5 cases in each practice, adjusted for key practice characteristics, and further inflate the control limits to account for overdispersion related to unobserved factors (including unobserved risk factors for CKD, and between-practice differences in coding and testing)...
January 17, 2017: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/28339739/unabated-occupational-risk-in-a-patient-with-rheumatoid-pulmonary-fibrosis
#11
V K Holden, S J Kligerman, T G Hastings, S E Hines
Background: This case highlights the importance of considering hypersensitivity pneumonitis (HP) in the differential diagnosis of interstitial lung disease (ILD) and of obtaining an occupational history so that remediable risk factors may be identified and managed. Aims: To report a case of a chicken sexer with severe rheumatoid arthritis (RA) who developed progressively worsening dyspnoea and restrictive lung disease associated with pulmonary fibrosis. Methods: Clinical investigation included physical examination, occupational history, pulmonary function tests (PFTs), chest imaging and bronchoalveolar lavage (BAL), as well as serological tests including standard IgE bird feather mixture and local IgG precipitin preparation to chicken excrement...
February 23, 2017: Occupational Medicine
https://www.readbyqxmd.com/read/28339636/a-before-after-study-of-multidisciplinary-out-of-hours-handover-combining-management-and-frontline-efforts-to-create-sustainable-improvement
#12
Christopher Pennell, Lorna Flynn, Belinda Boulton, Tracey Hughes, Graham Walker, Peter McCulloch
Objective: The importance of implementation strategy in systems improvement is increasingly recognized and both 'bottom-up' and 'top-down' approaches have significant barriers. A trial of a combined approach involving frontline and managerial staff therefore seems merited. We attempted to improve handover using a Human Factors-based approach integrated with a combined 'top and bottom' implementation strategy. Design: A before-after study was conducted across 9 months...
February 17, 2017: International Journal for Quality in Health Care
https://www.readbyqxmd.com/read/28339457/targeted-aav5-smad7-gene-therapy-inhibits-corneal-scarring-in-vivo
#13
Suneel Gupta, Jason T Rodier, Ajay Sharma, Elizabeth A Giuliano, Prashant R Sinha, Nathan P Hesemann, Arkasubhra Ghosh, Rajiv R Mohan
Corneal scarring is due to aberrant activity of the transforming growth factor β (TGFβ) signaling pathway following traumatic, mechanical, infectious, or surgical injury. Altered TGFβ signaling cascade leads to downstream Smad (Suppressor of mothers against decapentaplegic) protein-mediated signaling events that regulate expression of extracellular matrix and myogenic proteins. These events lead to transdifferentiation of keratocytes into myofibroblasts through fibroblasts and often results in permanent corneal scarring...
2017: PloS One
https://www.readbyqxmd.com/read/28338833/a-humidity-shock-leads-to-rapid-temperature-dependent-changes-in-coffee-leaf-physiology-and-gene-expression
#14
El-Hadji Thioune, James McCarthy, Thomas Gallagher, Bruce Osborne
Climate change is expected to increase the frequency of above-normal atmospheric water deficits contemporaneous with periods of high temperatures. Here we explore alterations in physiology and gene expression in leaves of Coffea canephora Pierre ex A. Froehner caused by a sharp drop in relative humidity (RH) at three different temperatures. Both stomatal conductance (gs) and CO2 assimilation (A) measurements showed that gs and A values fell quickly at all temperatures after the transfer to low RH.  However, leaf relative water content measurements indicated that leaves nonetheless experienced substantial water losses, implying that stomatal closure and/or resupply of water was not fast enough to stop excessive evaporative losses...
February 8, 2017: Tree Physiology
https://www.readbyqxmd.com/read/28338794/genome-wide-association-study-unravels-the-genetic-control-of-the-apple-volatilome-and-its-interplay-with-fruit-texture
#15
Brian Farneti, Mario Di Guardo, Iuliia Khomenko, Luca Cappellin, Franco Biasioli, Riccardo Velasco, Fabrizio Costa
Fruit quality represents a fundamental factor guiding consumers' preferences. Among apple quality traits, volatile organic compounds and texture features play a major role. Proton Transfer Reaction-Time of Flight-Mass Spectrometry (PTR-ToF-MS), coupled with an artificial chewing device, was used to profile the entire apple volatilome of 162 apple accessions, while the fruit texture was dissected with a TAXT-AED texture analyzer. The array of volatile compounds was classed into seven major groups and used in a genome-wide association analysis carried out with 9142 single nucleotide polymorphisms (SNPs)...
February 24, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28338777/the-chlamydia-suis-genome-exhibits-high-levels-of-diversity-plasticity-and-mobile-antibiotic-resistance-comparative-genomics-of-a-recent-livestock-cohort-shows-influence-of-treatment-regimes
#16
Helena M B Seth-Smith, Sabrina Wanninger, Nathan Bachmann, Hanna Marti, Weihong Qi, Manuela Donati, Antonietta di Francesco, Adam Polkinghorne, Nicole Borel
Chlamydia suis is an endemic pig pathogen, belonging to a fascinating genus of obligate intracellular pathogens. Of particular interest, this is the only chlamydial species to have naturally acquired genes encoding for tetracycline resistance. To date, the distribution and mobility of the Tet-island is not well understood. Our study focused on whole genome sequencing of 29 C. suis isolates from a recent porcine cohort within Switzerland, combined with data from USA tetracycline-resistant isolates. Our findings show that the genome of C...
March 2, 2017: Genome Biology and Evolution
https://www.readbyqxmd.com/read/28338755/red-blotch-disease-alters-grape-berry-development-and-metabolism-by-interfering-with-the-transcriptional-and-hormonal-regulation-of-ripening
#17
Barbara Blanco-Ulate, Helene Hopfer, Rosa Figueroa-Balderas, Zirou Ye, Rosa M Rivero, Alfonso Albacete, Francisco Pérez-Alfocea, Renata Koyama, Michael M Anderson, Rhonda J Smith, Susan E Ebeler, Dario Cantu
Grapevine red blotch-associated virus (GRBaV) is a major threat to the wine industry in the USA. GRBaV infections (aka red blotch disease) compromise crop yield and berry chemical composition, affecting the flavor and aroma properties of must and wine. In this study, we combined genome-wide transcriptional profiling with targeted metabolite analyses and biochemical assays to characterize the impact of the disease on red-skinned berry ripening and metabolism. Using naturally infected berries collected from two vineyards, we were able to identify consistent berry responses to GRBaV across different environmental and cultural conditions...
January 27, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28337903/air-liquid-interfacial-self-assembly-of-non-amphiphilic-poly-3-hexylthiophene-homopolymer
#18
Saejin Oh, Myungjae Yang, Jean Bouffard, Seunghun Hong, So-Jung Park
Here, we demonstrate that self-assembly of poly(3-hexylthiophene) (P3HT) at the air-water interface can lead to free-standing films of densely packed P3HT nanowires. Interfacial self-assembly on various liquid subphases such as water, diethylene glycol, and glycerol indicates that the viscosity of the subphase is an important factor for the formation of well-ordered nanostructures. The thin film morphology was also sensitive to the concentration of P3HT, their molecular weight (MW), and the presence of oxidative defects...
March 24, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28337714/decreased-live-births-among-women-of-middle-eastern-north-african-ethnicity-compared-to-caucasian-women
#19
W H Salem, A Abdullah, O Abuzeid, K Bendikson, F I Sharara, M Abuzeid
PURPOSE: The objective of this study is to determine if IVF outcome disparities exist among MENA women in the USA in comparison to a control group of Caucasian women. METHODS: A retrospective cohort study comparing MENA (N = 190) and Caucasian (N = 200) women undergoing their first IVF cycle between 5/2006 and 5/2014 was carried out at an academically affiliated fertility practice. All MENA cycles during that time period undergoing IVF/ICSI using autologous embryos and blastocyst transfers were compared to a control group of Caucasian women...
March 24, 2017: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/28336917/acclimation-of-a-low-iron-adapted-ostreococcus-strain-to-iron-limitation-through-cell-biomass-lowering
#20
Hugo Botebol, Gaelle Lelandais, Christophe Six, Emmanuel Lesuisse, Arnaud Meng, Lucie Bittner, Stéphane Lecrom, Robert Sutak, Jean-Claude Lozano, Philippe Schatt, Valérie Vergé, Stéphane Blain, François-Yves Bouget
Iron is an essential micronutrient involved in many biological processes and is often limiting for primary production in large regions of the World Ocean. Metagenomic and physiological studies have identified clades or ecotypes of marine phytoplankton that are specialized in iron depleted ecological niches. Although less studied, eukaryotic picophytoplankton does contribute significantly to primary production and carbon transfer to higher trophic levels. In particular, metagenomic studies of the green picoalga Ostreococcus have revealed the occurrence of two main clades distributed along coast-offshore gradients, suggesting niche partitioning in different nutrient regimes...
March 23, 2017: Scientific Reports
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