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https://www.readbyqxmd.com/read/28734297/nonequilibrium-phase-coexistence-and-criticality-near-the-second-explosion-limit-of-hydrogen-combustion
#1
Lucas B Newcomb, Mohammad Alaghemandi, Jason R Green
While hydrogen is a promising source of clean energy, the safety and optimization of hydrogen technologies rely on controlling ignition through explosion limits: pressure-temperature boundaries separating explosive behavior from comparatively slow burning. Here, we show that the emergent nonequilibrium chemistry of combustible mixtures can exhibit the quantitative features of a phase transition. With stochastic simulations of the chemical kinetics for a model mechanism of hydrogen combustion, we show that the boundaries marking explosive domains of kinetic behavior are nonequilibrium critical points...
July 21, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28728184/multi-spectral-imaging-of-circumscribed-choroidal-hemangioma-introduction
#2
Nicola Y Gan, Cheryl Zimmer, Wai-Ching Lam
BACKGROUND AND OBJECTIVE: To illustrate the features of a circumscribed choroidal hemangioma (CCH) using Annidis RHA multi-spectral imaging (MSI) technology (Annidis Corporation, Ottawa, Canada). This novel imaging technique uses non-overlapping, narrow-band LED light sources ranging from 520 nm to 940 nm to create a monochromatic series of en face fundus images and oxy/deoxyhemoglobin contrasted maps of the retina and choroid. PATIENTS AND METHODS: Annidis RHA MSI images were taken of a 67-year-old Chinese male with CCH...
July 1, 2017: Ophthalmic Surgery, Lasers & Imaging Retina
https://www.readbyqxmd.com/read/28723205/ultrafast-paper-thermometers-based-on-a-green-sensing-ink
#3
Xinglei Tao, Hanyu Jia, Yonglin He, Shenglong Liao, Yapei Wang
With the use of an ionic liquid as the ultrathermosensitive fluid, a paper thermometer is successfully developed with intrinsic ability of ultrafast response and high stability upon temperature change. The fluidic nature allows the ionic liquid to be easily deposited on paper by pen writing or inkjet printing, affording great promise for large-scale fabrication of low-cost paper sensors. Owing to the advantages of nonvolatilization, excellent continuity and deformability, the thermosensitive ink trapped within the cellulose fibers of paper matrix has no leakage or evaporation at open states, ensuring the excellent stability and repeatability of thermal sensing against arbitrary bending and folding operation...
March 24, 2017: ACS Sensors
https://www.readbyqxmd.com/read/28722147/surface-isoelectric-focusing-sief-with-carrier-ampholyte-ph-gradient
#4
Zhichao Wang, Cornelius Ivory, Adrienne R Minerick
Isoelectric focusing (IEF) is a powerful tool for amphoteric protein separations because of high sensitivity, bio-compatibility, and reduced complexity compared to chromatography or mechanical separation techniques. IEF miniaturization is attractive because it enables rapid analysis, easier adaptation to point of care applications, and smaller sample demands. However, existing small-scale IEF tools have not yet been able to analyze single protein spots from array libraries, which are ubiquitous in many pharmaceutical discovery and screening protocols...
July 19, 2017: Electrophoresis
https://www.readbyqxmd.com/read/28717021/genetic-and-metabolic-engineering-in-diatoms
#5
REVIEW
Weichao Huang, Fayza Daboussi
Diatoms have attracted considerable attention due to their success in diverse environmental conditions, which probably is a consequence of their complex origins. Studies of their metabolism will provide insight into their adaptation capacity and are a prerequisite for metabolic engineering. Several years of investigation have led to the development of the genome engineering tools required for such studies, and a profusion of appropriate tools is now available for exploring and exploiting the metabolism of these organisms...
September 5, 2017: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/28715740/rhamnolipid-biosurfactant-complexation-of-rare-earth-elements
#6
David E Hogan, Joan E Curry, Jeanne E Pemberton, Raina M Maier
Rare earth elements (REE) are vital for modern technologies and considered critical materials. This study investigated monorhamnolipid biosurfactant interactions with REE as the basis for REE recovery technology. Conditional stability constants (log β), measured using a resin-based ion exchange method, are reported for 16 REE and metals. These results were combined with existing data for 10 other metals to assess comparative strength and determinants of binding. The stability constants could be divided into three groups: weakly, moderately, and strongly bound...
June 23, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28713673/intraoperative-near-infrared-imaging-of-mesothelioma
#7
REVIEW
Gregory Thomas Kennedy, Andrew Newton, Jarrod Predina, Sunil Singhal
Though difficult to achieve, complete resection of malignant pleural mesothelioma is paramount to improving patient survival. Surgeons have traditionally been limited to using visual inspection and manual palpation to locate and remove cancerous tissue. However, intraoperative molecular imaging (IMI) is a promising new technology in surgery. Molecular imaging utilizes a fluorescent tracer that selectively accumulates in cancer cells. An imaging device is then used to detect and augment the fluorescent signal emitted from the fluorescent cancer cells...
June 2017: Translational Lung Cancer Research
https://www.readbyqxmd.com/read/28694303/single-molecule-fluorescence-microscopy-review-shedding-new-light-on-old-problems
#8
Sviatlana Shashkova, Mark C Leake
Fluorescence microscopy is an invaluable tool in the biosciences, a genuine workhorse technique offering exceptional contrast in conjunction with high specificity of labelling with relatively minimal perturbation to biological samples compared to many competing biophysical techniques. Improvements in detector and dye technologies coupled to advances in image analysis methods have fuelled recent development towards single-molecule fluorescence microscopy, which can utilise light microscopy tools to enable the faithful detection and analysis of single fluorescent molecules used as reporter tags in biological samples...
July 10, 2017: Bioscience Reports
https://www.readbyqxmd.com/read/28691351/structures-of-designed-armadillo-repeat-proteins-binding-to-peptides-fused-to-globular-domains
#9
Simon Hansen, Jonathan D Kiefer, Chaithanya Madhurantakam, Peer R E Mittl, Andreas Plückthun
Designed armadillo repeat proteins (dArmRP) are α-helical solenoid repeat proteins with an extended peptide binding groove that were engineered to develop a generic modular technology for peptide recognition. In this context, the term "peptide" not only denotes a short unstructured chain of amino acids, but also an unstructured region of a protein, as they occur in termini, loops or linkers between folded domains. Here we report two crystal structures of dArmRPs, in complex with peptides fused either to the N-terminus of Green Fluorescent Protein and to the C-terminus of a phage lambda protein D...
July 10, 2017: Protein Science: a Publication of the Protein Society
https://www.readbyqxmd.com/read/28686219/do-inequalities-in-neighborhood-walkability-drive-disparities-in-older-adults-outdoor-walking
#10
Razieh Zandieh, Johannes Flacke, Javier Martinez, Phil Jones, Martin van Maarseveen
Older residents of high-deprivation areas walk less than those of low-deprivation areas. Previous research has shown that neighborhood built environment may support and encourage outdoor walking. The extent to which the built environment supports and encourages walking is called "walkability". This study examines inequalities in neighborhood walkability in high- versus low-deprivation areas and their possible influences on disparities in older adults' outdoor walking levels. For this purpose, it focuses on specific neighborhood built environment attributes (residential density, land-use mix and intensity, street connectivity, and retail density) relevant to neighborhood walkability...
July 7, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28685574/low-cost-and-green-fabrication-of-polymer-electronic-devices-by-push-coating-the-polymer-active-layers
#11
Varun Vohra, Wojciech Mroz, Shusei Inaba, William Porzio, Umberto Giovanella, Francesco Galeotti
Due to both their easy processability and compatibility with roll-to-roll processes, polymer electronics is considered to be the most promising technology for the future generation of low-cost electronic devices such as light-emitting diodes and solar cells. However, the state-of-the-art deposition technique for polymer electronics (spin-coating) generates a high volume of chlorinated solution wastes during the active layer fabrication. Here, we demonstrate that devices with similar or higher performances can be manufactured using the push-coating technique in which a polydimethylsiloxane (PDMS) layer is simply laid over a very small amount of solution (less than 1l/covered cm2) which is then left for drying...
July 7, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28683540/composition-tunable-optical-properties-of-zn-x-cd-1%C3%A2-%C3%A2-x-s-quantum-dot-carboxymethylcellulose-conjugates-towards-one-pot-green-synthesis-of-multifunctional-nanoplatforms-for-biomedical-and-environmental-applications
#12
Alexandra A P Mansur, Herman S Mansur, Anderson J Caires, Rafael L Mansur, Luiz C Oliveira
Quantum dots (QDs) are colloidal semiconductor nanocrystals with unique properties that can be engineered by controlling the nanoparticle size and chemical composition by doping and alloying strategies. However, due to their potential toxicity, augmenting their biocompatibility is yet a challenge for expanding to several biomedical and environmentally friendly applications. Thus, the main goal of this study was to develop composition-tunable and biocompatible Zn x Cd1 - x S QDs using carboxymethylcellulose polysaccharide as direct capping ligand via green colloidal aqueous route at neutral pH and at room temperature for potential biomedical and environmental applications...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28683374/green-technological-approach-to-synthesis-hydrophobic-stable-crystalline-calcite-particles-with-one-pot-synthesis-for-oil-water-separation-during-oil-spill-cleanup
#13
Min-Nan Wu, Jyoti Prakash Maity, Jochen Bundschuh, Che-Feng Li, Chin-Rong Lee, Chun-Mei Hsu, Wen-Chien Lee, Chung-Ho Huang, Chien-Yen Chen
The process of separating oil and water from oil/water mixtures is an attractive strategy to answer the menace caused by industrial oil spills and oily wastewater. In addition, water coproduced during hydrocarbon exploitation, which can be an economic burden and risk for freshwater resources, can become an important freshwater source after suitable water-oil separation. For oil-water separation purposes, considerable attention has been paid to the preparation of hydrophobic-oleophilic materials with modified surface roughness...
July 3, 2017: Water Research
https://www.readbyqxmd.com/read/28678164/a-smart-and-balanced-energy-efficient-multihop-clustering-algorithm-smart-beem-for-mimo-iot-systems-in-future-networks
#14
Lina Xu, Gregory M P O'Hare, Rem Collier
Wireless Sensor Networks (WSNs) are typically composed of thousands of sensors powered by limited energy resources. Clustering techniques were introduced to prolong network longevity offering the promise of green computing. However, most existing work fails to consider the network coverage when evaluating the lifetime of a network. We believe that balancing the energy consumption in per unit area rather than on each single sensor can provide better-balanced power usage throughout the network. Our former work-Balanced Energy-Efficiency (BEE) and its Multihop version BEEM can not only extend the network longevity, but also maintain the network coverage...
July 5, 2017: Sensors
https://www.readbyqxmd.com/read/28676816/the-effect-of-spectral-quality-on-daily-patterns-of-gas-exchange-biomass-gain-and-water-use-efficiency-in-tomatoes-and-lisianthus-an-assessment-of-whole-plant-measurements
#15
Jason Lanoue, Evangelos D Leonardos, Xiao Ma, Bernard Grodzinski
Advancements in light-emitting diode (LED) technology have made them a viable alternative to current lighting systems for both sole and supplemental lighting requirements. Understanding how wavelength specific LED lighting can affect plants is thus an area of great interest. Much research is available on the wavelength specific responses of leaves from multiple crops when exposed to long-term wavelength specific lighting. However, leaf measurements do not always extrapolate linearly to the complexities which are found within a whole plant canopy, namely mutual shading and leaves of different ages...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28676130/skeletal-muscle-derived-interstitial-progenitor-cells-pics-display-stem-cell-properties-being-clonogenic-self-renewing-and-multi-potent-in-vitro-and-in-vivo
#16
Beverley J Cottle, Fiona C Lewis, Victoria Shone, Georgina M Ellison-Hughes
BACKGROUND: The development of cellular therapies to treat muscle wastage with disease or age is paramount. Resident muscle satellite cells are not currently regarded as a viable cell source due to their limited migration and growth capability ex vivo. This study investigated the potential of muscle-derived PW1(+)/Pax7(-) interstitial progenitor cells (PICs) as a source of tissue-specific stem/progenitor cells with stem cell properties and multipotency. METHODS: Sca-1(+)/PW1(+) PICs were identified on tissue sections from hind limb muscle of 21-day-old mice, isolated by magnetic-activated cell sorting (MACS) technology and their phenotype and characteristics assessed over time in culture...
July 4, 2017: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/28676082/cell-sex-affects-extracellular-matrix-protein-expression-and-proliferation-of-smooth-muscle-progenitor-cells-derived-from-human-pluripotent-stem-cells
#17
Yanhui Li, Yan Wen, Morgaine Green, Elise K Cabral, Prachi Wani, Fan Zhang, Yi Wei, Thomas M Baer, Bertha Chen
BACKGROUND: Smooth muscle progenitor cells (pSMCs) differentiated from human pluripotent stem cells (hPSCs) hold great promise for treating diseases or degenerative conditions involving smooth muscle pathologies. However, the therapeutic potential of pSMCs derived from men and women may be very different. Cell sex can exert a profound impact on the differentiation process of stem cells into somatic cells. In spite of advances in translation of stem cell technologies, the role of cell sex and the effect of sex hormones on the differentiation towards mesenchymal lineage pSMCs remain largely unexplored...
July 4, 2017: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/28675970/effect-of-microalgae-incorporation-on-physicochemical-and-textural-properties-in-wheat-bread-formulation
#18
Purificación García-Segovia, María J Pagán-Moreno, Irene F Lara, Javier Martínez-Monzó
The objective of this study was to evaluate the effect of the incorporation of different microalgae on physicochemical and textural properties of bread. Four species of microalgae Isochrysis galbana, Tetraselmis suecica, Scenedesmus almeriensis, and Nannochloropsis gaditana were used in this study. Properties such as water activity, pH, microbiological counts, viscosity, and color were analyzed to determine the effect of microalgae addition on sourdough. The technological quality of breads was analyzed in terms of physicochemical properties, color, texture profile, and porosity...
July 2017: Food Science and Technology International, Ciencia y Tecnología de Los Alimentos Internacional
https://www.readbyqxmd.com/read/28674925/biosorption-of-lead-phosphates-by-lead-tolerant-bacteria-as-a-mechanism-for-lead-immobilization
#19
Viridiana Rodríguez-Sánchez, Jesús Guzmán-Moreno, Vicente Rodríguez-González, Juan Armando Flores-de la Torre, Rosa María Ramírez-Santoyo, Luz Elena Vidales-Rodríguez
The study of metal-tolerant bacteria is important for bioremediation of contaminated environments and development of green technologies for material synthesis due to their potential to transform toxic metal ions into less toxic compounds by mechanisms such as reduction, oxidation and/or sequestration. In this study, we report the isolation of seven lead-tolerant bacteria from a metal-contaminated site at Zacatecas, México. The bacteria were identified as members of the Staphylococcus and Bacillus genera by microscopic, biochemical and 16S rDNA analyses...
August 2017: World Journal of Microbiology & Biotechnology
https://www.readbyqxmd.com/read/28674812/engineering-human-mesenchymal-stem-cells-to-release-adenosine-using-mirna-technology
#20
Gaoying Ren, Detlev Boison
Adenosine is an important modulator of metabolic activity with powerful tissue and cell protective functions. Adenosine kinase (ADK), the major adenosine-regulating enzyme, is critical to adapt its intra- and extracellular levels in response to environmental changes. Lentiviral RNAi-mediated downregulation of ADK in human mesenchymal stem cells (hMSCs) has therefore been considered an effective tool for engineering therapeutically effective adenosine-releasing cell grafts that could constitute patient-identical autologous implants for clinical application...
2017: Methods in Molecular Biology
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