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https://www.readbyqxmd.com/read/28424665/ca-similichlamydia-in-epitheliocystis-co-infection-of-gilthead-seabream-gills-unique-morphological-features-of-a-deep-branching-chlamydial-family
#1
Helena M B Seth-Smith, Pantelis Katharios, Nancy Dourala, José M Mateos, Alexander G J Fehr, Lisbeth Nufer, Maja Ruetten, Maricruz Guevara Soto, Lloyd Vaughan
The Planctomycetes-Verrucomicrobia-Chlamydiae (PVC) bacterial superphylum constitutes a broad range of organisms with an intriguing array of ultrastructural morphologies, including intracellular membranes and compartments and their corresponding complex genomes encoding these forms. The phylum Chlamydiae are all obligate intracellular bacteria and, although much is already known of their genomes from various families and how these regulate the various morphological forms, we know remarkably little about what is likely the deepest rooting clade of this phylum, which has only been found to contain pathogens of marine and fresh water vertebrates...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28424662/untangling-genomes-of-novel-planctomycetal-and-verrucomicrobial-species-from-monterey-bay-kelp-forest-metagenomes-by-refined-binning
#2
John Vollmers, Martinique Frentrup, Patrick Rast, Christian Jogler, Anne-Kristin Kaster
The kelp forest of the Pacific temperate rocky marine coastline of Monterey Bay in California is a dominant habitat for large brown macro-algae in the order of Laminariales. It is probably one of the most species-rich, structurally complex and productive ecosystems in temperate waters and well-studied in terms of trophic ecology. However, still little is known about the microorganisms thriving in this habitat. A growing body of evidence suggests that bacteria associated with macro-algae represent a huge and largely untapped resource of natural products with chemical structures that have been optimized by evolution for biological and ecological purposes...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28424631/mechanisms-underlying-the-emergence-of-post-acidosis-arrhythmia-at-the-tissue-level-a-theoretical-study
#3
Jieyun Bai, Renli Yin, Kuanquan Wang, Henggui Zhang
Acidosis has complex electrophysiological effects, which are associated with a high recurrence of ventricular arrhythmias. Through multi-scale cardiac computer modeling, this study investigated the mechanisms underlying the emergence of post-acidosis arrhythmia at the tissue level. In simulations, ten Tusscher-Panfilov ventricular model was modified to incorporate various data on acidosis-induced alterations of cellular electrophysiology and intercellular electrical coupling. The single cell models were incorporated into multicellular one-dimensional (1D) fiber and 2D sheet tissue models...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28422337/in-vivo-validation-of-a-novel-algorithm-for-automatic-premature-ventricular-contractions-recognition
#4
Jedrzej Kosiuk, Guilherme Portugal, Sebastian Hilbert, Silke John, Mario Oliveira, Gerhard Hindricks, Andreas Bollmann
INTRODUCTION: Template-matching algorithms are routinely used in the catheter ablation of patients with premature ventricular contractions (PVCs). However, systematic analysis of the accuracy and spatial resolution of such systems is lacking. Therefore, the aim of this evaluation was to perform a systematic in-vivo validation of performance of a novel automated template-matching algorithm. METHODS AND RESULTS: In a porcine model, paced beats simulating PVCs from different origins were investigated...
April 19, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/28421986/all-solid-state-pvc-membrane-and-carbon-paste-ion-selective-electrodes-for-determination-of-donepezil-hydrochloride-in-pharmaceutical-formulation
#5
Nesreen Khamees, Tagreed Abdel-Fattah Mohamed, Abeer Rashad Derar, Azza Aziz
All-solid-state, polyvinyl chloride (PVC) membrane, and carbon paste potentiometric ion-selective electrodes (ISEs) were proposed for the determination of donepezil hydrochloride (DON) in the drug substance and a pharmaceutical formulation. The potentiometric response toward DON was based on the existence of donepezil-tetraphenyl borate (DON-TPB) in a PVC membrane or a carbon paste in the presence of dioctylphthalate. In contrast, the solid-state electrode was prepared by direct incorporation of DON-TPB into a commercial nail varnish without external additives...
April 18, 2017: Journal of AOAC International
https://www.readbyqxmd.com/read/28419339/effect-of-chlorine-treatment-on-inhibition-of-e-coli-serogroup-o2-incorporation-into-7-day-old-biofilm-on-polyvinylchloride-surface
#6
P Maharjan, S Dey, G Huff, W Zhang, G K Phillips, S Watkins
Poultry waterlines are constructed using polyvinylchloride (PVC) material on which bacterial biofilm can easily form. Biofilm can harbor pathogens including avian pathogenic E. coli (APEC) strains. An in vitro evaluation was performed to determine if E. coli sero group O2 (avian pathogenic) could attach on a PVC surface that had pre-formed biofilm and if this phenomenon could be affected when water was treated with chlorine. Initially, biofilm growth was induced in PVC test coupons (15.16 cm2) for a 7-day period mimicking the waterline scenario in the first wk of poultry brooding; and then this biofilm was challenged with E...
April 17, 2017: Poultry Science
https://www.readbyqxmd.com/read/28415468/characterization-of-the-surface-physico-chemistry-of-plasticized-pvc-used-in-blood-bag-and-infusion-tubing
#7
H Al Salloum, J Saunier, A Dazzi, J Vigneron, A Etcheberry, C Marlière, C Aymes-Chodur, J M Herry, M Bernard, E Jubeli, N Yagoubi
Commercial infusion tubing and blood storage devices (tubing, blood and platelets bags) made of plasticized PVC were analyzed by spectroscopic, chromatographic and microscopic techniques in order to identify and quantify the additives added to the polymer (lubricants, thermal stabilizers, plasticizers) and to put into evidence their blooming onto the surface of the devices. For all the samples, deposits were observed on the surface but with different kinds of morphologies. Ethylene bis amide lubricant and metallic stearate stabilizers were implicated in the formation of these layers...
June 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28408652/premature-ventricular-contraction-coupling-interval-variability-destabilizes-cardiac-neuronal-and-electrophysiological-control-insights-from-simultaneous-cardioneural-mapping
#8
David Hamon, Pradeep S Rajendran, Ray W Chui, Olujimi A Ajijola, Tadanobu Irie, Ramin Talebi, Siamak Salavatian, Marmar Vaseghi, Jason S Bradfield, J Andrew Armour, Jeffrey L Ardell, Kalyanam Shivkumar
BACKGROUND: Variability in premature ventricular contraction (PVC) coupling interval (CI) increases the risk of cardiomyopathy and sudden death. The autonomic nervous system regulates cardiac electrical and mechanical indices, and its dysregulation plays an important role in cardiac disease pathogenesis. The impact of PVCs on the intrinsic cardiac nervous system, a neural network on the heart, remains unknown. The objective was to determine the effect of PVCs and CI on intrinsic cardiac nervous system function in generating cardiac neuronal and electric instability using a novel cardioneural mapping approach...
April 2017: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/28407853/effects-of-environmental-enrichment-on-reproductive-performance-and-quantity-and-morphology-of-cumulus-oocyte-complexes-obtained-from-rattus-norvegicus
#9
Joana Fisch, Iáskara Vieira de Oliveira, Juliana Fank, Lia Mara Gomes Paim, Marília Remuzzi Zandoná, Eliana Franco Lopes, Fernanda Bastos de Mello, Alexandre Tavares Duarte de Oliveira
Several researchers have observed that environmental enrichment (EE) can be effective in reducing stressful conditions and abnormal behavior and may provide better reproductive performance in rodents. In this context, this study aimed to evaluate the reproductive performance of Wistar rats reared in three different housing conditions. Animals were separated into breeding pairs, one pair per cage and pairs randomly assigned to three experimental groups (ten couples per group): control group were provided cages without any environmental enrichment; PVC group with PVC pipe; and cardboard roll group with a commercially available cardboard tube...
May 2017: Theriogenology
https://www.readbyqxmd.com/read/28406736/biofilm-formation-on-aquaculture-substrates-by-selected-bacterial-fish-pathogens
#10
Wenlong Cai, Covadonga R Arias
The objective of this study was to determine whether common bacterial catfish pathogens could attach and colonize surfaces commonly found in aquaculture facilities. In addition, we evaluated the role of calcium in biofilm formation. Attachment to polystyrene plates was used to quantify biofilm formation by five bacterial pathogens (i.e., Flavobacterium columnare, Aeromonas hydrophila, Edwardsiella ictaluri, E. tarda, and E. piscicida). Flavobacterium columnare and A. hydrophila formed thick biofilms that were enhanced by calcium supplementation...
June 2017: Journal of Aquatic Animal Health
https://www.readbyqxmd.com/read/28406344/fabrication-and-evaluation-of-eudragit%C3%A2-polymeric-films-for-transdermal-delivery-of-piroxicam
#11
Doungdaw Chantasart, Preeda Tocanitchart, Amaraporn Wongrakpanich, Veerawat Teeranachaideekul, Varaporn Buraphacheep Junyaprasert
The aims of this work were to develop and characterize the prolonged release piroxicam transdermal patch as a prototype to substitute oral formulations, to reduce side effects and improve patient compliance. The patches were composed of film formers (Eudragit(®)) as a matrix backbone, with PVC as a backing membrane and PEG200 used as a plasticizer. Results from X-ray diffraction patterns and Fourier transform-infrared spectroscopy indicated that loading piroxicam into films changed the drug crystallinity from needle to an amorphous or dissolved form...
April 13, 2017: Pharmaceutical Development and Technology
https://www.readbyqxmd.com/read/28400158/a-novel-process-for-separation-of-polycarbonate-polyvinyl-chloride-and-polymethyl-methacrylate-waste-plastics-by-froth-flotation
#12
Chong-Qing Wang, Hui Wang, Luo-Luo Huang
A novel process was proposed for separation of ternary waste plastics by froth flotation. Pretreatment of plastics with potassium permanganate (KMnO4) solution was conducted to aid flotation separation of polycarbonate (PC), polyvinyl chloride (PVC) and polymethyl methacrylate (PMMA) plastics. The effect of pretreatment parameters including KMnO4 concentration, treatment time, temperature and stirring rate on flotation recovery were investigated by single factor experiments. Surface treatment with KMnO4 changes selectively the flotation behavior of PC, PVC and PMMA, enabling separation of the plastics by froth flotation...
April 8, 2017: Waste Management
https://www.readbyqxmd.com/read/28396240/identification-of-proteins-involved-in-the-adhesionof-candida-species-to-different-medical-devices
#13
Arianna Núñez-Beltrán, Everardo López-Romero, Mayra Cuéllar-Cruz
Adhesion is the first step for Candida species to form biofilms on medical devices implanted in the human host. Both the physicochemical nature of the biomaterial and cell wall proteins (CWP) of the pathogen play a determinant role in the process. While it is true that some CWP have been identified in vitro, little is known about the CWP of pathogenic species of Candida involved in adhesion. On this background, we considered it important to investigate the potential role of CWP of C. albicans, C. glabrata, C...
April 7, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28396041/association-of-holter-derived-heart-rate-variability-parameters-with-the-development-of-congestive-heart-failure-in-the-cardiovascular-health-study
#14
Vaiibhav N Patel, Brian R Pierce, Rohan K Bodapati, David L Brown, Diane G Ives, Phyllis K Stein
OBJECTIVES: This study sought to determine whether Holter-based parameters of heart rate variability (HRV) are independently associated with incident heart failure among older adults in the CHS (Cardiovascular Health Study) as evidenced by an improvement in the predictive power of the Health Aging and Body Composition Heart Failure (Health ABC) score. BACKGROUND: Abnormal HRV, a marker of autonomic dysfunction, has been associated with multiple adverse cardiovascular outcomes but not the development of congestive heart failure (CHF)...
March 30, 2017: JACC. Heart Failure
https://www.readbyqxmd.com/read/28395156/phosphogypsum-recycling-in-the-building-materials-industry-assessment-of-the-radon-exhalation-rate
#15
M P Campos, L J P Costa, M B Nisti, B P Mazzilli
Phosphogypsum can be classified as a Naturally Occurring Radioactive Material (NORM) residue of the phosphate fertilizer industry. One of the main environmental concerns of its use as building material is the radon exhalation. The aim of this study is to measure the radon exhalation rate from plates and bricks manufactured with phosphogypsum from three installations of the main Brazilian producer, Vale Fertilizantes, in order to evaluate the additional health risk to dwellers. A simple and reliable accumulator method involving a PVC pipe sealed with a PVC pipe cover commercially available with CR-39 radon detector into a diffusion chamber was used for measuring radon exhalation rate from phosphogypsum made plates and bricks...
April 7, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28394563/unclonable-security-codes-designed-from-multicolor-luminescent-lanthanide-doped-y2o3-nanorods-for-anticounterfeiting
#16
Pawan Kumar, Kanika Nagpal, Bipin Kumar Gupta
The duplicity of important documents has emerged as a serious problem worldwide. Therefore, many efforts have been devoted to developing easy and fast anticounterfeiting techniques with multicolor emission. Herein, we report the synthesis of multicolor luminescent lanthanide-doped Y2O3 nanorods by hydrothermal method and their usability in designing of unclonable security codes for anticounterfeiting applications. The spectroscopic features of nanorods are probed by photoluminescence spectroscopy. The Y2O3:Eu(3+), Y2O3:Tb(3+), and Y2O3:Ce(3+) nanorods emit hypersensitive red (at 611 nm), strong green (at 541 nm), and bright blue (at 438 nm) emissions at 254, 305, and 381 nm, respectively...
April 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28394198/dechlorination-of-pvc-wastes-by-co-hydrothermal-treatment-with-alkaline-additives
#17
Peitao Zhao, Tian Li, Weijie Yan, Longji Yuan
Some chemicals were usually utilized in the hydrothermal dechlorination (HTD) of chlorine-containing wastes without revealing their roles. This work intends to investigate the role of chemical additives in the HTD of PVC (polyvinyl chloride). Several chemicals, including Na2CO3, KOH, NaOH, NH3·H2O, CaO and NaHCO3, were added into the PVC HTD process, which was conducted in subcritical Ni(2+)-containing water at 220 °C for 30 min. The results show the alkalinity of additives had notable effects on the dechlorination efficiency (DE) of PVC due to the neutralization between HCl and additives...
April 10, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28391408/informativeness-of-patient-initial-reports-of-adverse-drug-reactions-can-it-be-improved-by-a-pharmacovigilance-centre
#18
F Kheloufi, A Default, F Rouby, D Laugier-Castellan, M Boyer, B Rodrigues, J Ponte-Astoul, M J Jean-Pastor, O Blin, J Micallef
PURPOSE: Little is known about the informativeness of initial patient reports before they are reviewed by a pharmacovigilance centre (PVC). We aim to describe the patterns of patient adverse drug reaction (ADR) reporting in France and estimate the contribution of a review by a PVC assessor on the informativeness of these reports. METHODS: A retrospective study was conducted on patient reports between July 2011 and July 2015. Informativeness of 16 key elements of information (including drug start and end date, duration of treatment, time to onset and duration of the ADR, outcome, medical history and concomitant medication) was assessed in initial reports before and after review by a pharmacovigilance assessor...
April 8, 2017: European Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28388306/premature-ventricular-complex-is-more-prevalent-during-acute-exacerbated-than-stable-states-of-chronic-obstructive-pulmonary-disease-and-is-related-to-cardiac-troponin-t
#19
Gunnar Einvik, Rahul Bhatnagar, Nils Henrik Holmedahl, Anke Neukamm, Torbjørn Omland, Vidar Søyseth
During acute exacerbation of chronic obstructive pulmonary disease (AECOPD), myocardial stress may be aggravated. Sparse data exist concerning the prevalence and correlates of cardiac arrhythmias in the stable and exacerbated states of COPD. We hypothesized that AECOPD is associated with increased prevalence of cardiac arrhythmias independent of COPD-severity and co-morbidity, and explored possible mechanisms. A 24-hour Holter recording was obtained in 74 patients with stable COPD and 45 patients with AECOPD (mean age 54 years, 56% women)...
April 7, 2017: COPD
https://www.readbyqxmd.com/read/28372499/incidence-of-adverse-events-during-peripheral-administration-of-sodium-chloride-3
#20
Ryan C Dillon, Cristian Merchan, Diana Altshuler, John Papadopoulos
PURPOSE: Traditionally, sodium chloride 3% has been administered via a central venous line (CVL) because of the perceived risk of infiltration and tissue injury due to its high osmolarity. In clinical practice, sodium chloride 3% is commonly administered through peripheral venous catheters (PVCs) given the necessity of timely administration. However, there is no published data on the safety of administering sodium chloride 3% through PVCs in the adult population. The objective of this study was to evaluate the safety of peripheral venous administration of sodium chloride 3%...
January 1, 2017: Journal of Intensive Care Medicine
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