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https://www.readbyqxmd.com/read/28106311/potential-applications-of-non-thermal-plasmas-against-biofilm-associated-microorganisms-in-vitro
#1
REVIEW
Pradeep Puligundla, Chulkyoon Mok
Biofilms as complex microbial communities attached to surfaces are posing several challenges in different sectors, ranging from food and healthcare to desalination and power generation. Biofilms survive in hostile environments due to a distinct physiology and behavior in comparison to their planktonic counterparts. They are ubiquitous, resilient, and difficult to eradicate due to their resistant phenotype. Several chemical-based cleaning and disinfection regimens are conventionally used against biofilm-dwelling microorganisms in vitro...
January 20, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28094515/nanoporous-materials-for-the-onboard-storage-of-natural-gas
#2
K Vasanth Kumar, Kathrin Preuss, Maria-Magdalena Titirici, Francisco Rodríguez-Reinoso
Climate change, global warming, urban air pollution, energy supply uncertainty and depletion, and rising costs of conventional energy sources are, among others, potential socioeconomic threats that our community faces today. Transportation is one of the primary sectors contributing to oil consumption and global warming, and natural gas (NG) is considered to be a relatively clean transportation fuel that can significantly improve local air quality, reduce greenhouse-gas emissions, and decrease the energy dependency on oil sources...
January 17, 2017: Chemical Reviews
https://www.readbyqxmd.com/read/28062838/enzymes-as-modular-catalysts-for-redox-half-reactions-in-h2-powered-chemical-synthesis-from-biology-to-technology
#3
REVIEW
Holly A Reeve, Philip A Ash, HyunSeo Park, Ailun Huang, Michalis Posidias, Chloe Tomlinson, Oliver Lenz, Kylie A Vincent
The present study considers the ways in which redox enzyme modules are coupled in living cells for linking reductive and oxidative half-reactions, and then reviews examples in which this concept can be exploited technologically in applications of coupled enzyme pairs. We discuss many examples in which enzymes are interfaced with electronically conductive particles to build up heterogeneous catalytic systems in an approach which could be termed synthetic biochemistry We focus on reactions involving the H(+)/H2 redox couple catalysed by NiFe hydrogenase moieties in conjunction with other biocatalysed reactions to assemble systems directed towards synthesis of specialised chemicals, chemical building blocks or bio-derived fuel molecules...
January 15, 2017: Biochemical Journal
https://www.readbyqxmd.com/read/28059364/1120-nm-khz-linewidth-single-polarization-single-frequency-yb-doped-phosphate-fiber-laser
#4
Changsheng Yang, Qilai Zhao, Zhouming Feng, Mingying Peng, Zhongmin Yang, Shanhui Xu
A spectrally clean kHz-linewidth single-polarization single-frequency distributed Bragg reflector Yb-doped phosphate fiber (YPF) laser at 1120 nm (> 1100 nm) for the first time is demonstrated. By enhancing the reflectivity of output fiber Bragg grating and optimizing the length of YPF to implement the effective ASE suppression and single-longitudinal-mode long-wavelength lasing, a stable output power of over 62 mW is achieved from a 31-mm-long highly YPF with a linewidth of 5.7 kHz. The signal to noise ratio of > 67 dB, the polarization extinction ratio of > 25 dB, and the relative intensity noise of < -150 dB/Hz for the frequencies above 10...
December 26, 2016: Optics Express
https://www.readbyqxmd.com/read/28034538/an-outbreak-of-surgical-site-infections-following-craniotomy-procedures-associated-with-a-change-in-the-ultrasonic-surgical-aspirator-decontamination-process
#5
Caroline Sheitoyan-Pesant, Isabelle Alarie, Christian Iorio-Morin, David Mathieu, Alex Carignan
We investigated an outbreak of surgical site infections that occurred in a tertiary care hospital in Quebec, Canada. This investigation revealed that a change in the sterilization process of the ultrasonic surgical aspirator may have caused this outbreak. It emphasizes the fact that the complex designs of surgical power tools may restrict access to cleaning and sterilization agents. Health care professionals should review manufacturers' assembly/disassembly instructions and sterilization/decontamination procedures before use of such tools...
December 26, 2016: American Journal of Infection Control
https://www.readbyqxmd.com/read/28027554/features-of-coronary-heart-disease-development-in-emergency-workers-of-the-chornobyl-accident-depending-on-the-action-of-radiation-and-non-radiation-risk-factors-and-genotypes-of-single-nucleotide-polymorphism-rs966221-of-phosphodiesterase-4d-gene
#6
D Belyi, G Pleskach, O Nastina, G Sidorenko, N Kursina, O Bazyka, O Kovalev, A Chumak, I Abramenko
OBJECTIVE: This study devoted to specific features of coronary heart disease (CHD) development in emergency work ers (EW) of the accident at the Chernobyl nuclear power plant (ChNPP) based on analysis the interaction between radiation and non radiation risk factors and single nucleotide polymorphism (SNP) rs966221 of phosphodiesterase (PDE) 4D gene. METHODS: It was examined 397 men with CHD, including 274 EW of 1986-1987 and 123 non irradiated persons (con trol group) who were 66±10 and 69±11 years old relatively...
December 2016: Problemy Radiat︠s︡iĭnoï Medyt︠s︡yny Ta Radiobiolohiï
https://www.readbyqxmd.com/read/28024336/fully-packaged-blue-energy-harvester-by-hybridizing-a-rolling-triboelectric-nanogenerator-and-an-electromagnetic-generator
#7
Xin Wang, Zhen Wen, Hengyu Guo, Changsheng Wu, Xu He, Long Lin, Xia Cao, Zhong Lin Wang
Ocean energy, in theory, is an enormous clean and renewable energy resource that can generate electric power much more than that required to power the entire globe without adding any pollution to the atmosphere. However, owing to a lack of effective technology, such blue energy is almost unexplored to meet the energy requirement of human society. In this work, a fully packaged hybrid nanogenerator consisting of a rolling triboelectric nanogenerator (R-TENG) and an electromagnetic generator (EMG) is developed to harvest water motion energy...
December 27, 2016: ACS Nano
https://www.readbyqxmd.com/read/28001378/the-economic-merits-of-flexible-carbon-capture-and-sequestration-as-a-compliance-strategy-with-the-clean-power-plan
#8
Michael T Craig, Paulina Jaramillo, Haibo Zhai, Kelly Klima
Carbon capture and sequestration (CCS) may be a key technology for achieving large CO2 emission reductions. Relative to "normal" CCS, "flexible" CCS retrofits include solvent storage that allows the generator to temporarily reduce the CCS parasitic load and increase the generator's net efficiency, capacity, and ramp rate. Due to this flexibility, flexible CCS generators provide system benefits that normal CCS generators do not, which could make flexible CCS an economic CO2 emission reduction strategy. Here, we estimate the system-level cost-effectiveness of reducing CO2 emissions with flexible CCS compared to re-dispatching (i...
December 21, 2016: Environmental Science & Technology
https://www.readbyqxmd.com/read/27996231/coupling-molecularly-ultrathin-sheets-of-nife-layered-double-hydroxide-on-nico2o4-nanowire-arrays-for-highly-efficient-overall-water-splitting-activity
#9
Zhiqiang Wang, Sha Zeng, Weihong Liu, Xingwang Wang, Qingwen Li, Zhigang Zhao, Fengxia Geng
Developing efficient but nonprecious bifunctional electrocatalysts for overall water splitting in basic media has been the subject of intensive research focus with the increasing demand for clean and regenerated energy. Herein, we report on the synthesis of a novel hierarchical hybrid electrode, NiFe-layered double hydroxide molecularly ultrathin sheets grown on NiCo2O4 nanowire arrays assembled from thin platelets with nickel foam as the scaffold support, in which the catalytic metal sites are more accessible and active and most importantly strong chemical coupling exists at the interface, enabling superior catalytic power toward both oxygen evolution reaction (OER) and additionally hydrogen evolution reaction (HER) in the same alkaline KOH electrolyte...
January 18, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/27994826/crossfit-%C3%A2-instructor-demographics-and-practice-trends
#10
Gregory R Waryasz, Vladimir Suric, Alan H Daniels, Joseph A Gil, Craig P Eberson
CrossFit(®) is an increasingly popular exercise modality that uses high intensity power training. The literature to date regarding CrossFit(®) has focused on its benefits to VO2 Max, body composition and the motivational variables of participants of CrossFit(®). A computerized survey was distributed to CrossFit(®) instructors using Survey Monkey(®) (Palo Alto, CA, USA). One hundred and ninety-three CrossFit(®) instructors responded to the survey. Of these 86.6% (155/179) reported being a certified CrossFit(®) instructor with 26...
November 17, 2016: Orthopedic Reviews
https://www.readbyqxmd.com/read/27994253/the-path-towards-sustainable-energy
#11
Steven Chu, Yi Cui, Nian Liu
Civilization continues to be transformed by our ability to harness energy beyond human and animal power. A series of industrial and agricultural revolutions have allowed an increasing fraction of the world population to heat and light their homes, fertilize and irrigate their crops, connect to one another and travel around the world. All of this progress is fuelled by our ability to find, extract and use energy with ever increasing dexterity. Research in materials science is contributing to progress towards a sustainable future based on clean energy generation, transmission and distribution, the storage of electrical and chemical energy, energy efficiency, and better energy management systems...
December 20, 2016: Nature Materials
https://www.readbyqxmd.com/read/27992327/stc-a-simple-to-complex-framework-for-weakly-supervised-semantic-segmentation
#12
Yunchao Wei, Xiaodan Liang, Yunpeng Chen, Xiaohui Shen, Ming-Ming Cheng, Jiashi Feng, Yao Zhao, Shuicheng Yan
Recently, significant improvement has been made on semantic object segmentation due to the development of deep convolutional neural networks (DCNNs). Training such a DCNN usually relies on a large number of images with pixel-level segmentation masks, and annotating these images is very costly in terms of both finance and human effort. In this paper, we propose a simple to complex (STC) framework in which only image-level annotations are utilized to learn DCNNs for semantic segmentation. Specifically, we first train an initial segmentation network called Initial-DCNN with the saliency maps of simple images (i...
December 6, 2016: IEEE Transactions on Pattern Analysis and Machine Intelligence
https://www.readbyqxmd.com/read/27988243/radiocarbon-concentration-in-tree-ring-samples-collected-in-the-south-west-slovakia-1974-2013
#13
I Kontuľ, M Ješkovský, J Kaizer, A Šivo, M Richtáriková, P P Povinec, P Čech, P Steier, R Golser
Radiocarbon measurements of tree-ring samples collected in Vysoká pri Morave were compared with tree-ring data of the Žlkovce monitoring station situated 5km south-east from the Jaslovské Bohunice Nuclear Power Plant (NPP). Radiocarbon concentrations in Vysoká pri Morave and in Žlkovce tree rings were decreasing exponentially with decay constants of 14.48±1.23 y and 17.96±1.97 y, respectively, in agreement with similar results obtained at other radiocarbon stations. The Suess effect, represented by a dilution in (14)C levels by fossil fuel CO2 emissions, was observed in both tree-ring data sets...
December 3, 2016: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/27956245/neurotoxins-in-a-water-supply-reservoir-an-alert-to-environmental-and-human-health
#14
Sabrina Loise de Morais Calado, Juliana Wojciechowski, Gustavo Souza Santos, Valéria Freitas de Magalhães, André Andrian Padial, Marta Margarete Cestari, Helena Cristina da Silva de Assis
Reservoirs are important source of power generation, recreation, and water supply. Nevertheless, human activities have favored the bloom of toxic cyanobacteria in many reservoirs, which has resulted in environmental, social, and economic problems. This study aims to evaluate the water quality of a reservoir in South Brazil through the analysis of cyanobacteria and cyanotoxins PSTs (Paralytic Shellfish Toxins) and biomarkers of environmental contamination in fish. For this purpose, water samples and fish (Geophagus brasiliensis) (Perciformes: Cichlidae) were collected from September 2013 to May 2014...
December 10, 2016: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/27955896/congener-specific-determination-of-polychlorinated-naphthalenes-in-sediment-and-biota-by-gas-chromatography-high-resolution-mass-spectrometry
#15
R Lega, D Megson, C Hartley, P Crozier, K MacPherson, T Kolic, P A Helm, A Myers, S P Bhavsar, E J Reiner
An isotope dilution congener-specific method for the determination of the most abundant and most toxic polychlorinated naphthalenes (PCNs) was developed using gas chromatography with high resolution mass spectrometry (GC-HRMS). The method was used to determine the concentration of 24 target congeners and total PCN concentrations in fish and sediment samples. Tissue samples were extracted using pressurized liquid extraction (PLE) and sediment samples were extracted using Soxhlet extraction. Sample extracts were cleaned up using either a manual two-stage open column procedure or an automated FMS Power Prep System with multi-analyte and multi-sample capability using a three-column cleanup procedure...
January 6, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/27940061/hemodialyzer-reuse-and-gram-negative-bloodstream-infections
#16
Chris Edens, Jacklyn Wong, Meghan Lyman, Kyle Rizzo, Duc Nguyen, Michela Blain, Sam Horwich-Scholefield, Heather Moulton-Meissner, Erin Epson, Jon Rosenberg, Priti R Patel
BACKGROUND: Clusters of bloodstream infections caused by Burkholderia cepacia and Stenotrophomonas maltophilia are uncommon, but have been previously identified in hemodialysis centers that reprocessed dialyzers for reuse on patients. We investigated an outbreak of bloodstream infections caused by B cepacia and S maltophilia among hemodialysis patients in clinics of a dialysis organization. STUDY DESIGN: Outbreak investigation, including matched case-control study...
December 7, 2016: American Journal of Kidney Diseases: the Official Journal of the National Kidney Foundation
https://www.readbyqxmd.com/read/27936304/continuous-flow-synthesis-and-purification-of-aryldiazomethanes-through-hydrazone-fragmentation
#17
Éric Lévesque, Simon T Laporte, André B Charette
Electron-rich diazo compounds, such as aryldiazomethanes, are powerful reagents for the synthesis of complex structures, but the risks associated with their toxicity and instability often limit their use. Flow chemistry techniques make these issues avoidable, as the hazardous intermediate can be used as it is produced, avoiding accumulation and handling. Unfortunately, the produced stream is often contaminated with other reagents and by-products, making it incompatible with many applications, especially in catalysis...
December 9, 2016: Angewandte Chemie
https://www.readbyqxmd.com/read/27934804/use-of-hydrogen-peroxide-vapour-plasma-irradiation-in-combination-for-quick-decontamination-of-closed-chambers
#18
Devendra T Mourya, Hamish C Shahani, Pragya D Yadav, Pradip V Barde
BACKGROUND & OBJECTIVES: Various conventional methods such as gaseous, vapour and misting systems, fogging, manual spray and wipe techniques employing a number of chemical agents are used for decontamination of enclosed spaces. Among all these methods, use of aerosolized formaldehyde is the most preferred method due to cost-effectiveness and practical aspects. However, being extremely corrosive in nature generating very irritating fumes and difficulty in maintaining a high level of gas concentration, many laboratories prefer the vaporization of hydrogen peroxide (H 2 O 2 ) as an alternative...
August 2016: Indian Journal of Medical Research
https://www.readbyqxmd.com/read/27927034/addressing-challenges-for-youths-with-mobility-devices-in-winter-conditions
#19
Ernesto Morales, Sally Lindsay, Geoffrey Edwards, Lori Howell, Claude Vincent, Nicole Yantzi, Véronique Gauthier
PURPOSE: Winter-related research about the experience of navigating in the urban context has mostly focused on the elderly population with physical disabilities. The aim of this project was to explore potential design solutions to enhance young people's mobility devices and the built environment to improve accessibility and participation in winter. METHODS: A multi-method qualitative design process included the following steps: (1) in-depth interviews; (2) photo elicitation; (3) individual co-design sessions; and (4) group co-design sessions (i...
December 7, 2016: Disability and Rehabilitation
https://www.readbyqxmd.com/read/27920441/nanotechnology-for-environmentally-sustainable-electromobility
#20
Linda Ager-Wick Ellingsen, Christine Roxanne Hung, Guillaume Majeau-Bettez, Bhawna Singh, Zhongwei Chen, M Stanley Whittingham, Anders Hammer Strømman
Electric vehicles (EVs) powered by lithium-ion batteries (LIBs) or proton exchange membrane hydrogen fuel cells (PEMFCs) offer important potential climate change mitigation effects when combined with clean energy sources. The development of novel nanomaterials may bring about the next wave of technical improvements for LIBs and PEMFCs. If the next generation of EVs is to lead to not only reduced emissions during use but also environmentally sustainable production chains, the research on nanomaterials for LIBs and PEMFCs should be guided by a life-cycle perspective...
December 6, 2016: Nature Nanotechnology
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