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https://www.readbyqxmd.com/read/28437439/landscape-and-environmental-influences-on-mycobacterium-ulcerans-distribution-among-aquatic-sites-in-ghana
#1
Shannon M Pileggi, Heather Jordan, Julie A Clennon, Ellen Whitney, M Eric Benbow, Richard Merritt, Mollie McIntosh, Ryan Kimbirauskas, Pamela Small, Daniel Boakye, Charles Quaye, Jiaguo Qi, Lindsay Campbell, Jenni Gronseth, Edwin Ampadu, William Opare, Lance A Waller
Buruli ulcer, caused by Mycobacterium ulcerans, is highly endemic in West Africa. While the mode of transmission is unknown, many studies associate Buruli ulcer with different types of water exposure. We present results from the largest study to date to test for M. ulcerans in aquatic sites and identify environmental attributes associated with its presence. Environmental samples from 98 aquatic sites in the Greater Accra, Ashanti, and Volta regions of Ghana were tested for the presence of M. ulcerans DNA by polymerase chain reaction...
2017: PloS One
https://www.readbyqxmd.com/read/28427736/interactions-between-reciprocal-st-segment-downsloping-during-st-elevated-myocardial-infarction-and-global-cardiac-perfusion-and-functional-abnormalities
#2
Riccardo Liga, Enrico Orsini, Paolo Caravelli, Marco De Carlo, Anna Sonia Petronio, Mario Marzilli
Reciprocal ST-segment downsloping on electrocardiogram is a frequent finding during ST-elevated myocardial infarction (STEMI), but its etiology is still disputed. We sought to evaluate the relation between reciprocal ST-segment downsloping during STEMI and major cardiac perfusion and functional parameters. One hundred eighty-five patients with STEMI underwent emergency coronary angiography. The presence of reciprocal ST-segment downsloping was assessed. At coronary angiography, the corrected TIMI frame count (cTFC) was computed both on culprit and remote vessels and the occurrence of "no/slow reflow" phenomenon after percutaneous coronary intervention (PCI) identified...
March 29, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28427011/biosensors-for-the-monitoring-of-harmful-algal-blooms
#3
REVIEW
Daniel A McPartlin, Jonathan H Loftus, Aoife S Crawley, Joe Silke, Caroline S Murphy, Richard J O'Kennedy
Harmful algal blooms (HABs) are a major global concern due to their propensity to cause environmental damage, healthcare issues and economic losses. In particular, the presence of toxic phytoplankton is a cause for concern. Current HAB monitoring programs often involve laborious laboratory-based analysis at a high cost and with long turnaround times. The latter also hampers the potential to develop accurate and reliable models that can predict HAB occurrence. However, a promising solution for this issue may be in the form of remotely deployed biosensors, which can rapidly and continuously measure algal and toxin levels at the point-of-need (PON), at a low cost...
April 17, 2017: Current Opinion in Biotechnology
https://www.readbyqxmd.com/read/28426001/remote-epitaxy-through-graphene-enables-two-dimensional-material-based-layer-transfer
#4
Yunjo Kim, Samuel S Cruz, Kyusang Lee, Babatunde O Alawode, Chanyeol Choi, Yi Song, Jared M Johnson, Christopher Heidelberger, Wei Kong, Shinhyun Choi, Kuan Qiao, Ibraheem Almansouri, Eugene A Fitzgerald, Jing Kong, Alexie M Kolpak, Jinwoo Hwang, Jeehwan Kim
Epitaxy-the growth of a crystalline material on a substrate-is crucial for the semiconductor industry, but is often limited by the need for lattice matching between the two material systems. This strict requirement is relaxed for van der Waals epitaxy, in which epitaxy on layered or two-dimensional (2D) materials is mediated by weak van der Waals interactions, and which also allows facile layer release from 2D surfaces. It has been thought that 2D materials are the only seed layers for van der Waals epitaxy...
April 19, 2017: Nature
https://www.readbyqxmd.com/read/28422039/-urinary-tract-lymphoepithelial-carcinoma-report-of-two-cases-and-bibliographic-review
#5
Sebastian Valverde Martínez, Waleska Salcedo Mercado, Isabel Rodríguez Cruz, Sara Belén Prieto Nogal, Mario Martín Hernández, Luis Miguel Gómez Tejeda
OBJECTIVE: We report two cases of patients diagnosed with lymphoepithelioma-like carcinomas of the urinary tract. We review the literature of this rare entity. The objective is to clarify the clinical and therapeutic characteristics. METHODS: We present a retrospective review of medical records of two patients diagnosed with lymphoepithelioma-like carcinomas, one in the renal pelvis and the other in the bladder. We review the epidemiology, diagnosis and therapeutic alternatives...
April 2017: Archivos Españoles de Urología
https://www.readbyqxmd.com/read/28418704/false-negatives-for-remote-life-detection-on-ocean-bearing-planets-lessons-from-the-early-earth
#6
Christopher T Reinhard, Stephanie L Olson, Edward W Schwieterman, Timothy W Lyons
Ocean-atmosphere chemistry on Earth has undergone dramatic evolutionary changes throughout its long history, with potentially significant ramifications for the emergence and long-term stability of atmospheric biosignatures. Though a great deal of work has centered on refining our understanding of false positives for remote life detection, much less attention has been paid to the possibility of false negatives, that is, cryptic biospheres that are widespread and active on a planet's surface but are ultimately undetectable or difficult to detect in the composition of a planet's atmosphere...
April 2017: Astrobiology
https://www.readbyqxmd.com/read/28415230/scale-invariant-puddles-in-graphene-geometric-properties-of-electron-hole-distribution-at-the-dirac-point
#7
M N Najafi, M Ghasemi Nezhadhaghighi
We characterize the carrier density profile of the ground state of graphene in the presence of particle-particle interaction and random charged impurity in zero gate voltage. We provide detailed analysis on the resulting spatially inhomogeneous electron gas, taking into account the particle-particle interaction and the remote Coulomb disorder on an equal footing within the Thomas-Fermi-Dirac theory. We present some general features of the carrier density probability measure of the graphene sheet. We also show that, when viewed as a random surface, the electron-hole puddles at zero chemical potential show peculiar self-similar statistical properties...
March 2017: Physical Review. E
https://www.readbyqxmd.com/read/28403899/hepato-bronchial-fistula-secondary-to-perforated-sigmoid-diverticulitis-a-case-report
#8
Jun Sunny Yin, Shaylan Govind, Daniele Wiseman, Richard Inculet, Raymond Kao
BACKGROUND: Patients with diverticulitis are predisposed to hepatic abscesses via seeding through the portal circulation. Hepatic abscesses are well-documented sequelae of diverticulitis, however instances of progression to hepato-bronchial fistulization are rare. We present a case of diverticulitis associated with hepatic abscess leading to hepato-bronchial fistulization, which represents a novel disease course not yet reported in the literature. CASE PRESENTATION: A 61-year-old Caucasian man presented with a history of unintentional weight loss and dyspnea both at rest and with exertion...
April 13, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/28400784/high-throughput-phenotyping-of-sorghum-plant-height-using-an-unmanned-aerial-vehicle-and-its-application-to-genomic-prediction-modeling
#9
Kakeru Watanabe, Wei Guo, Keigo Arai, Hideki Takanashi, Hiromi Kajiya-Kanegae, Masaaki Kobayashi, Kentaro Yano, Tsuyoshi Tokunaga, Toru Fujiwara, Nobuhiro Tsutsumi, Hiroyoshi Iwata
Genomics-assisted breeding methods have been rapidly developed with novel technologies such as next-generation sequencing, genomic selection and genome-wide association study. However, phenotyping is still time consuming and is a serious bottleneck in genomics-assisted breeding. In this study, we established a high-throughput phenotyping system for sorghum plant height and its response to nitrogen availability; this system relies on the use of unmanned aerial vehicle (UAV) remote sensing with either an RGB or near-infrared, green and blue (NIR-GB) camera...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28387213/single-electron-transistors-with-hydrogen-treatment-of-ald-sio-sub-2-sub-in-nanoscale-metal-insulator-metal-tunnel-junctions
#10
Golnaz Karbasian, Michael Steven McConnell, Alexei Orlov, Alexei Nazarov, Gregory Snider
Over the past five years, fabrication of metal-insulator-metal (MIM) single electron transistors (SET) featuring atomic layer deposition (ALD) of ultrathin tunnel barrier dielectrics (SiO<sub>2</sub>, Al<sub>2</sub>O<sub>3</sub>) has been reported. However, the performance of fabricated devices was significantly compromised by the presence of native metal oxide and problems associated with the nucleation of ALD dielectrics on metal substrates. To overcome the difficulty of dielectric ALD nucleation on metal substrates, we recently developed a fabrication technique in which the native metal oxide naturally forming in the presence of the ALD oxidant precursor is first used to promote the nucleation of ALD dielectrics, and then is chemically reduced by forming gas anneal (FGA) at temperatures near 400°C...
April 7, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28385226/stimulative-nanogels-with-enhanced-thermosensitivity-for-therapeutic-delivery-via-%C3%AE-cyclodextrin-induced-formation-of-inclusion-complexes
#11
Panpan Yi, Yifeng Wang, Shihao Zhang, Yuan Zhan, Yuhong Zhang, Zhengguang Sun, Yulin Li, Peixin He
To explore the potential biomedical application of thermoresponsive nanosystems, it is important to enhance their thermosensitivity to improve the controllability in delivery of therapeutic agents. The present work develops multifunctional nanogels with enhanced thermosensitivity through copolymerization of N-isopropylacrylamide (NIPAM) and acrylic acid (AA) in the presence of β-cyclodextrin (β-CD), using N,N'-bis(acryloyl)cystamine (BAC) as a biodegradable crosslinker. The resulting nanogels display significantly improved sensitivity in deswelling (swelling) behavior upon temperature increase (decrease) around body temperature...
June 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28382537/delayed-contrast-enhanced-computed-tomography-in-patients-with-known-or-suspected-cardiac-sarcoidosis-a-feasibility-study
#12
Tadao Aikawa, Noriko Oyama-Manabe, Masanao Naya, Hiroshi Ohira, Ayako Sugimoto, Ichizo Tsujino, Masahiko Obara, Osamu Manabe, Kohsuke Kudo, Hiroyuki Tsutsui, Nagara Tamaki
OBJECTIVES: To evaluate the diagnostic value of delayed contrast-enhanced computed tomography (DE-CT) for cardiac sarcoidosis (CS) in patients with or without implantable devices, including a quantitative comparison with late gadolinium enhancement cardiac magnetic resonance (LGE-CMR). METHODS: Twenty-four patients (mean age, 64 ± 9 years; 17 women) with known or suspected CS underwent retrospective electrocardiogram-gated DE-CT at 80 kV with knowledge-based iterative model reconstruction...
April 5, 2017: European Radiology
https://www.readbyqxmd.com/read/28376882/upper-airway-viruses-and-bacteria-in-urban-aboriginal-and-torres-strait-islander-children-in-brisbane-australia-a-cross-sectional-study
#13
Kerry-Ann F O'Grady, Kerry K Hall, Theo P Sloots, Jennie Anderson, Anne B Chang
BACKGROUND: Respiratory morbidity in Australian Indigenous children is higher than their non-Indigenous counterparts, irrespective of urban or remote residence. There are limited studies addressing acute respiratory illness (ARI) in urban Indigenous children, particularly those that address the upper airway microbiome and its relationship to disease. We aimed to describe the prevalence of upper airway viruses and bacteria in symptomatic and asymptomatic urban-based Australian Indigenous children aged less than 5 years...
April 4, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28376234/adult-mortality-in-a-low-density-tree-population-using-high-resolution-remote-sensing
#14
James R Kellner, Stephen P Hubbell
We developed a statistical framework to quantify mortality rates in canopy trees observed using time series from high-resolution remote sensing. By timing the acquisition of remote sensing data with synchronous annual flowering in the canopy tree species Handroanthus guayacan, we made 2,596 unique detections of 1,006 individual adult trees within 18,883 observation attempts on Barro Colorado Island, Panama (BCI) during an 11-year period. There were 1,057 observation attempts that resulted in missing data due to cloud cover or incomplete spatial coverage...
April 4, 2017: Ecology
https://www.readbyqxmd.com/read/28371469/improving-emergency-department-medical-clinical-handover-barriers-at-the-bedside
#15
Gerrard Oren Marmor, Michael Yonghong Li
OBJECTIVE: The present paper describes our experience of developing and piloting a best practice model of medical clinical handover. Secondary aims were to improve reliability of communication, identify negative effects on patient care and assess staff adherence and acceptance of the process. METHODS: We described existing handover practice. We designed and implemented a process incorporating bedside handover, the Identification, Situation, Background, Assessment, Requirements and Requests (ISBAR) tool and handover documentation...
March 29, 2017: Emergency Medicine Australasia: EMA
https://www.readbyqxmd.com/read/28369081/rapid-diagnostic-tests-duo-as-alternative-to-conventional-serological-assays-for-conclusive-chagas-disease-diagnosis
#16
Karina E Egüez, Julio Alonso-Padilla, Carolina Terán, Zenobia Chipana, Wilson García, Faustino Torrico, Joaquim Gascon, Daniel-Franz Lozano-Beltran, María-Jesús Pinazo
Chagas disease is caused by the parasite Trypanosoma cruzi. It affects several million people, mainly in Latin America, and severe cardiac and/or digestive complications occur in ~30% of the chronically infected patients. Disease acute stage is mostly asymptomatic and infection goes undiagnosed. In the chronic phase direct parasite detection is hampered due to its concealed presence and diagnosis is achieved by serological methods, like ELISA or indirect hemagglutination assays. Agreement in at least two tests must be obtained due to parasite wide antigenic variability...
April 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28358338/heat-wave-vulnerability-mapping-for-india
#17
Gulrez Azhar, Shubhayu Saha, Partha Ganguly, Dileep Mavalankar, Jaime Madrigano
Assessing geographic variability in heat wave vulnerability forms the basis for planning appropriate targeted adaptation strategies. Given several recent deadly heatwaves in India, heat is increasingly being recognized as a public health problem. However, to date there has not been a country-wide assessment of heat vulnerability in India. We evaluated demographic, socioeconomic, and environmental vulnerability factors and combined district level data from several sources including the most recent census, health reports, and satellite remote sensing data...
March 30, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28349259/effect-of-paroxetine-on-left-ventricular-remodeling-in-an-in-vivo-rat-model-of-myocardial-infarction
#18
Thomas Ravn Lassen, Jan Møller Nielsen, Jacob Johnsen, Steffen Ringgaard, Hans Erik Bøtker, Steen Buus Kristiansen
Left ventricular (LV) remodeling following a myocardial infarction (MI) involves formation of reactive oxygen species (ROS). Paroxetine, a selective serotonin reuptake inhibitor, has an antioxidant effect in the vascular wall. We investigated whether paroxetine reduces myocardial ROS formation and LV remodeling following a MI. In a total of 32 Wistar rats, MI was induced by a 30-min ligation of the left anterior descending artery followed by 7- or 28-day reperfusion. During the 28 days of reperfusion, LV remodeling was evaluated by magnetic resonance imaging (MRI) and echocardiography (n = 20)...
May 2017: Basic Research in Cardiology
https://www.readbyqxmd.com/read/28348407/fabrication-of-nanotweezers-and-their-remote-actuation-by-magnetic-fields
#19
Cécile Iss, Guillermo Ortiz, Alain Truong, Yanxia Hou, Thierry Livache, Roberto Calemczuk, Philippe Sabon, Eric Gautier, Stéphane Auffret, Liliana D Buda-Prejbeanu, Nikita Strelkov, Hélène Joisten, Bernard Dieny
A new kind of nanodevice that acts like tweezers through remote actuation by an external magnetic field is designed. Such device is meant to mechanically grab micrometric objects. The nanotweezers are built by using a top-down approach and are made of two parallelepipedic microelements, at least one of them being magnetic, bound by a flexible nanohinge. The presence of an external magnetic field induces a torque on the magnetic elements that competes with the elastic torque provided by the nanohinge. A model is established in order to evaluate the values of the balanced torques as a function of the tweezers opening angles...
March 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28337734/diffusion-tensor-imaging-dti-findings-in-adult-civilian-military-and-sport-related-mild-traumatic-brain-injury-mtbi-a-systematic-critical-review
#20
Breton Michael Asken, Steven T DeKosky, James R Clugston, Michael S Jaffee, Russell M Bauer
This review seeks to summarize diffusion tensor imaging (DTI) studies that have evaluated structural changes attributed to the mechanisms of mild traumatic brain injury (mTBI) in adult civilian, military, and athlete populations. Articles from 2002 to 2016 were retrieved from PubMed/MEDLINE, EBSCOhost, and Google Scholar, using a Boolean search string containing the following terms: "diffusion tensor imaging", "diffusion imaging", "DTI", "white matter", "concussion", "mild traumatic brain injury", "mTBI", "traumatic brain injury", and "TBI"...
March 24, 2017: Brain Imaging and Behavior
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