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https://www.readbyqxmd.com/read/29793183/environmental-radionuclides-as-contaminants-of-hpge-gamma-ray-spectrometers-monte-carlo-simulations-for-modane-underground-laboratory
#1
R Breier, V B Brudanin, P Loaiza, F Piquemal, P P Povinec, E Rukhadze, N Rukhadze, I Štekl
The main limitation in the high-sensitive HPGe gamma-ray spectrometry has been the detector background, even for detectors placed deep underground. Environmental radionuclides such as 40 K and decay products in the 238 U and 232 Th chains have been identified as the most important radioactive contaminants of construction parts of HPGe gamma-ray spectrometers. Monte Carlo simulations have shown that the massive inner and outer lead shields have been the main contributors to the HPGe-detector background, followed by aluminum cryostat, copper cold finger, detector holder and the lead ring with FET...
May 21, 2018: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/29793176/non-ldl-dyslipidemia-is-prevalent-in-the-young-and-determined-by-lifestyle-factors-and-age-the-lifelines-cohort
#2
Jeroen K de Vries, Jan W Balder, Michelle J Pena, Petra Denig, Andries J Smit
BACKGROUND AND AIMS: Non-LDL dyslipidemia (NLD) confers cardiovascular risk, and prevalence rates appear to be high in elderly populations. Small cohorts have identified several lifestyle, anthropometric, and medical factors associated with NLD. We aimed to assess sex- and age-specific prevalence of NLD in a contemporary population cohort (n = 167 729), and to identify independent determinants of NLD, focusing on lifestyle, anthropometric, and medical factors. METHODS: The prevalence of NLD was assessed per 10-year age intervals in adults without cardiovascular disease not using lipid-modifying drugs from the Dutch LifeLines cohort...
May 21, 2018: Atherosclerosis
https://www.readbyqxmd.com/read/29793174/effect-of-ca-2-ion-concentration-on-adsorption-of-poly-carboxylate-ether-based-pce-superplasticizer-on-mica
#3
Bo Wu, Byong-Wa Chun, Le Gu, Tonya L Kuhl
HYPOTHESIS: Poly(carboxylate ether)-based (PCE) superplasticizers consist of a carboxylic acid backbone and grafted poly(ethylene glycol) (PEG) side chains. Ca2+ ion bridging mechanism is commonly purported to control PCE's adsorption on negatively charged cement particle surfaces in cement suspension, thus PCE was expected to adsorb on negatively charged surfaces in synthetic pore solutions via Ca2+ /COO- interactions. EXPERIMENTS: Adsorption behaviors of a commercial PCE on negatively charged mica were studied in aqueous electrolyte solutions by a surface forces apparatus...
May 9, 2018: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29793166/renoprotective-effect-of-the-isoflavonoid-biochanin-a-against-cisplatin-induced-acute-kidney-injury-in-mice-effect-on-inflammatory-burden-and-p53-apoptosis
#4
Faiha A Suliman, Dina M Khodeer, Afaf Ibrahiem, Eman T Mehanna, Mohamed K El-Kherbetawy, Hala M F Mohammad, Sawsan A Zaitone, Yasser M Moustafa
Cisplatin is a potent widely-used chemotherapeutics; however, its clinical use is associated with nephrotoxicity. Renoprotective approaches are being discovered to halt the tubular cell death due to inflammatory and apoptotic burdens. In the present study, the renoprotective effects of different doses of biochanin A (10, 20 or 40 mg/kg) in mice treated with a single injection of cisplatin (10 mg/kg) were reported. Cisplatin administration resulted in marked increases in serum creatinine and blood urea nitrogen...
May 21, 2018: International Immunopharmacology
https://www.readbyqxmd.com/read/29793163/rheological-characterisation-of-concentrated-domestic-slurry
#5
A K Thota Radhakrishnan, J B van Lier, F H L R Clemens
The much over-looked element in new sanitation, the transport systems which bridge the source and treatment facilities, is the focus of this study. The knowledge of rheological properties of concentrated domestic slurry is essential for the design of the waste collection and transport systems. To investigate these properties, samples were collected from a pilot sanitation system in the Netherlands. Two types of slurries were examined: black water (consisting of human faecal waste, urine, and flushed water from vacuum toilets) and black water with ground kitchen waste...
May 3, 2018: Water Research
https://www.readbyqxmd.com/read/29793161/exposure-of-microcystis-aeruginosa-to-hydrogen-peroxide-and-titanium-dioxide-under-visible-light-conditions-modeling-the-impact-of-hydrogen-peroxide-and-hydroxyl-radical-on-cell-rupture-and-microcystin-degradation
#6
Che-Wei Chang, Xiangchen Huo, Tsair-Fuh Lin
The aims of this study are to evaluate, under visible light conditions, the ability of H2 O2 and TiO2 to produce OH, their quantitative impacts on the cell integrity of Microcystis, and the subsequent release and degradation of microcystins (MCs). A sequential reaction model was developed, including one sub-model to simulate the rupture kinetics for cell integrity of Microcystis, and another to describe the release and degradation of MCs. For cell rupture, the dual-oxidant Delayed Chick-Watson model (DCWM) and dual-oxidant Hom model (HM) were first proposed and developed, giving excellent simulation results of cell rupture kinetics...
May 14, 2018: Water Research
https://www.readbyqxmd.com/read/29793106/microplastics-in-mussels-sampled-from-coastal-waters-and-supermarkets-in-the-united-kingdom
#7
Jiana Li, Christopher Green, Alan Reynolds, Huahong Shi, Jeanette M Rotchell
Global contamination of the marine environment by plastic has led to the discovery of microplastics in a range of marine species, including those for human consumption. In this study, the presence of microplastics and other anthropogenic debris in seawater and mussels (Mytilus edulis) from coastal waters of the U.K., as well as supermarket sources, was investigated. These were detected in all samples from all sites with spatial differences observed. Seawater samples taken from 6 locations (in triplicates) displayed 3...
May 21, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29793096/segmentation-of-histological-images-and-fibrosis-identification-with-a-convolutional-neural-network
#8
Xiaohang Fu, Tong Liu, Zhaohan Xiong, Bruce H Smaill, Martin K Stiles, Jichao Zhao
Segmentation of histological images is one of the most crucial tasks for many biomedical analyses involving quantification of certain tissue types, such as fibrosis via Masson's trichrome staining. However, challenges are posed by the high variability and complexity of structural features in such images, in addition to imaging artifacts. Further, the conventional approach of manual thresholding is labor-intensive, and highly sensitive to inter- and intra-image intensity variations. An accurate and robust automated segmentation method is of high interest...
May 16, 2018: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/29793092/a-combined-ftir-and-dsc-study-on-the-bilayer-stabilising-effect-of-electrostatic-interactions-in-ion-paired-lipids
#9
Maximilian Schmid, Christian Wölk, Julia Giselbrecht, K L Andrew Chan, Richard D Harvey
Investigating lipid ion pair formation is important for understanding the mechanisms of lipid-mediated drug resistance in bacteria. In this study we have used the charged amphiphiles dipalmitoylphosphatidylglycerol (DPPG) and dihexadecyldimethylammonium bromide (DHDAB), as a model to evaluate the formation of ion pairs by a combined Fourier transform infrared spectroscopy (FTIR) and differential scanning calorimetry (DSC) analysis. FTIR was employed to study the environment of the DPPC headgroup phosphate and lipid/surfactant alkane chains, in vesicles formed by the two amphiphiles mixed in various molar ratios...
May 17, 2018: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29793083/optimization-adsorption-of-norfloxacin-onto-polydopamine-microspheres-from-aqueous-solution-kinetic-equilibrium-and-adsorption-mechanism-studies
#10
Yibei Wan, Xiao Liu, Penglei Liu, Lei Zhao, Weihua Zou
Polydopamine microspheres (PDMPs) synthesized by a facile solution oxidation method were adopted as a potential adsorbent for the removal of Norfloxacin (NOR) from aqueous solution. The morphologies and properties of PDMPs were characterized using TEM, SEM, FTIR and pHPZC . Parameters effects such as contact time, initial pH, initial concentration and ionic strength on the adsorption capacity of NOR onto PDMPs were studied. To maximize NOR removal from liquid phase, Box-Behnken experimental design (BBD) combined with response surface modeling (RSM) was employed based on the 17 preliminary experiments at 308 K...
May 21, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29793071/extracting-similar-terms-from-multiple-emr-based-semantic-embeddings-to-support-chart-reviews
#11
M S Cheng Ye, Daniel Fabbri
OBJECTIVE: Word embeddings project semantically similar terms into nearby points in a vector space. When trained on clinical text, these embeddings can be leveraged to improve keyword search and text highlighting. In this paper, we present methods to refine the selection process of similar terms from multiple EMR-based word embeddings, and evaluate their performance quantitatively and qualitatively across multiple chart review tasks. MATERIALS AND METHODS: Word embeddings were trained on each clinical note type in an EMR...
May 21, 2018: Journal of Biomedical Informatics
https://www.readbyqxmd.com/read/29793061/microstructural-imaging-of-the-human-brain-with-a-super-scanner-10-key-advantages-of-ultra-strong-gradients-for-diffusion-mri
#12
D K Jones, D C Alexander, R Bowtell, M Cercignani, F Dell'Acqua, D J McHugh, K L Miller, M Palombo, G J M Parker, U S Rudrapatna, C M W Tax
The key component of a microstructural diffusion MRI 'super-scanner' is a dedicated high-strength gradient system that enables stronger diffusion weightings per unit time compared to conventional gradient designs. This can, in turn, drastically shorten the time needed for diffusion encoding, increase the signal-to-noise ratio, and facilitate measurements at shorter diffusion times. This review, written from the perspective of the National Facility for In Vivo MR Imaging of Human Tissue Microstructure, an initiative to establish a shared 300 mT/m-gradient facility amongst the microstructural imaging community, describes ten advantages of ultra-strong gradients for microstructural imaging...
May 21, 2018: NeuroImage
https://www.readbyqxmd.com/read/29793054/bacillus-clausii-inhibits-bone-loss-by-skewing-treg-th17-cell-equilibrium-in-postmenopausal-osteoporotic-mice-model
#13
Hamid Y Dar, Subhashis Pal, Prashant Shukla, Pradyumna K Mishra, Geetanjali B Tomar, Naibedya Chattopadhyay, Rupesh K Srivastava
OBJECTIVES: Postmenopausal osteoporosis is one of most commonly occurring skeletal diseases leading to bone loss and fragility. Probiotics have been associated with various immunomodulatory properties and thus can be exploited to enhance bone health. In the present study, we report, to our knowledge for the first time, that oral administration of Bacillus clausii (BC) in postmenopausal osteoporotic (OVX) mice model enhances bone health. METHODS: BC was selected as probiotic of choice due to its established immunomodulatory properties...
March 20, 2018: Nutrition
https://www.readbyqxmd.com/read/29793052/title-lhp1-interacts-with-atrx-through-plant-specific-domains-at-specific-loci-targeted-by-prc2
#14
Haifeng Wang, Danhua Jiang, Elin Axelsson, Zdravko J Lorković, Sean Montgomery, Sarah Holec, Bas J G E Pieters, Abbas H K Al Temimi, Jasmin Mecinović, Frédéric Berger
Heterochromatin Protein 1 (HP1) is a major regulator of chromatin structure and function. In animals, the network of proteins interacting with HP1 is mainly associated with constitutive heterochromatin marked by H3K9me3. HP1 physically interacts with the putative orthologue of the SNF2 chromatin remodeler ATRX, which controls deposition of the histone variant H3.3 in mammals. In Arabidopsis thaliana, we show that the orthologue of ATRX participates in H3.3 deposition and characterize the function of conserved domains of plant ATRX...
May 21, 2018: Molecular Plant
https://www.readbyqxmd.com/read/29793021/phosphoinositide-3-kinase-p110%C3%AE-negatively-regulates-thrombopoietin-mediated-platelet-activation-and-thrombus-formation
#15
T A Blair, S F Moore, T G Walsh, J L Hutchinson, T N Durrant, K E Anderson, A W Poole, I Hers
Phosphoinositide 3-kinase (PI3K) plays an important role in platelet function and contributes to platelet hyperreactivity induced by elevated levels of circulating peptide hormones, including thrombopoietin (TPO). Previous work established an important role for the PI3K isoform; p110β in platelet function, however the role of p110α is still largely unexplored. Here we sought to investigate the role of p110α in TPO-mediated hyperactivity by using a conditional p110α knockout (KO) murine model in conjunction with platelet functional assays...
May 21, 2018: Cellular Signalling
https://www.readbyqxmd.com/read/29793011/thoracic-endovascular-aortic-repair-tevar-versus-best-medical-treatment-bmt-for-high-risk-type-b-intramural-hematoma-imh-a-systematic-review-of-clinical-studies
#16
REVIEW
Lin Li, Yuanyong Jiao, Junjie Zou, Xiwei Zhang, Hongyu Yang, Hao Ma
BACKGROUND: To date , thoracic endovascular aortic repair (TEVAR) for type B aortic dissection is favorable, but TEVAR for type B IMH remains uncertain. There are numerous clinical (eg, refractory pain) and radiologic (eg, IMH thickness) factors that are reported to be associated with IMH progression, challenging the treatment for high-risk type B IMH with high risk factors in clinical practice. OBJECTIVE: To perform a systematic review of clinical studies to investigate outcomes of TEVAR+BMT and BMT in the treatment of high-risk type B IMH ...
May 21, 2018: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/29792995/lumbar-discectomy-is-associated-with-higher-rates-of-lumbar-fusion
#17
Hector Castillo, Ravi Chintapalli, Harout Boyajian, Sebastian A Cruz, Vince K Morgan, Lewis L Shi, Michael J Lee
BACKGROUND CONTEXT: Lumbar disc herniation affects over three million people in the United States every year, and the rate of operation continually increases, particularly in patients 60 years or older.1,2 Surgical discectomy is a common treatment for lumbar disc herniation.1,3 One concern for this method is the risk of undergoing additional surgeries. 2,5,7 There are very limited population-level studies that examine the rate of lumbar fusion following lumbar discectomy. Additionally, there is no study that examines the risk of undergoing lumbar fusion in patients who have undergone lumbar discectomies compared to the risk of lumbar fusion in the general population with no previous lumbar discectomy...
May 21, 2018: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/29792994/lumbar-spinal-stenosis-comparison-of-surgical-practice-variation-and-clinical-outcome-in-three-national-spine-registries
#18
Greger Lønne, Peter Fritzell, Olle Hägg, Dennis Nordvall, Paul Gerdhem, Tobias Lagerbäck, Mikkel Andersen, Søren Eiskjaer, Martin Gehrchen, Wilco Jacobs, Miranda L van Hooff, Tore K Solberg
BACKGROUND: Decompression surgery for lumbar spinal stenosis (LSS) is the most common spinal procedure in the elderly. To avoid persisting low back pain, adding arthrodesis has been recommended, especially if there is a coexisting degenerative spondylolisthesis. However, this strategy remains controversial, resulting in practice-based variation. PURPOSE: To evaluate in a pragmatic study if surgical selection criteria and variation in use of arthrodesis in three Scandinavian countries can be linked to variation in treatment effectiveness...
May 21, 2018: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/29792992/frailty-status-as-a-predictor-of-three-month-cognitive-and-functional-recovery-following-spinal-surgery-a-prospective-pilot-study
#19
Robert J Rothrock, Jeremy M Steinberger, Henry Badgery, Andrew C Hecht, Samuel K Cho, John M Caridi, Stacie Deiner
Background Context As increasing numbers of elderly Americans undergo spinal surgery, it is important to identify which patients are at highest risk for poor cognitive and functional recovery. Frailty is a geriatric syndrome which has been closely linked to poor outcomes, and short form screening may be a helpful tool for preoperative identification of at risk patients. Purpose To conduct a pilot study on the usefulness of a short-form screening tool to identify elderly patients at increased risk for prolonged cognitive and functional recovery following elective spine surgery...
May 21, 2018: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/29792971/impact-of-active-surveillance-and-infection-control-measures-on-carbapenem-resistant-gram-negative-bacterial-colonization-and-infections-in-intensive-care
#20
T Karampatakis, K Tsergouli, E Iosifidis, C Antachopoulos, A Karapanagiotou, A Karyoti, N Gritsi-Gerogianni, A Tsakris, E Roilides
BACKGROUND: Carbapenem-resistant Gram-negative bacteria (CRGNB) infections constitute a global threat for critically ill patients and the outcome of their hospitalization. Early identification of CRGNB through rectal surveillance cultures and routine infection control measures including contact precautions, use of appropriate disinfectants, staff education on cleaning, and hand hygiene may reduce the dissemination of CRGNB. AIM: To assess the impact of enhanced infection control measures on CRGNB infections in a nine-bed polyvalent intensive care unit in a tertiary level hospital in an endemic area...
May 21, 2018: Journal of Hospital Infection
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