keyword
MENU ▼
Read by QxMD icon Read
search

water science

keyword
https://www.readbyqxmd.com/read/28099810/anisotropic-self-assembly-of-supramolecular-polymers-and-plasmonic-nanoparticles-at-the-liquid-liquid-interface
#1
Joseph J Armao, Irina Nyrkova, Gad Fuks, Artem Osypenko, Mounir Maaloum, Emilie Moulin, Raul Arenal, Odile Gavat, Alexander N Semenov, Nicolas Giuseppone
The study of supramolecular polymers in the bulk, in solution, and at the solid-liquid interface has recently become a major topic of interest, going from fundamental aspects to applications in materials science. However, examples of 1D supramolecular polymers at the liquid-liquid interface are mostly unexplored. Here we describe the light-assisted supramolecular polymerization of triarylamine molecules and their organization at a chloroform-water interface. The resulting interfacial nematic layer of these 1D supramolecular polymers is further used as a template for the precise alignment of spherical gold nanoparticles coming from the water phase...
January 18, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28097647/microbiota-composition-and-pulmonary-surfactant-protein-expression-as-markers-of-death-by-drowning
#2
So-Yeon Lee, Seung-Kyun Woo, So-Min Lee, Eun-Ju Ha, Kyoung-Hee Lim, Kyung-Hwa Choi, Young-Hee Roh, Yong-Bin Eom
Pathological diagnosis of drowning remains a challenge for forensic science, because of a lack of pathognomonic findings. We analyzed microbiota and surfactant protein in the lungs for a novel diagnosis of drowning. All rats were divided into drowning, postmortem submersion, and control groups. The water, lungs, closed organs (kidney and liver), and cardiac blood in rats were assayed by targeting 16S ribosomal RNA of Miseq sequencing. Lung samples were analyzed by immunohistochemical staining for surfactant protein A...
January 18, 2017: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/28095899/what-is-the-relationship-between-type-2-diabetes-mellitus-status-and-the-neuroradiological-correlates-of-cerebral-small-vessel-disease-in-adults-protocol-for-a-systematic-review
#3
Clark Funnell, Mary M Doyle-Waters, Samuel Yip, Thalia Field
BACKGROUND: Cerebral small vessel disease (CSVD) is a common cause of stroke, dementia, and functional decline. In recent years, neuroradiologic correlates of CSVD have been identified. These imaging findings, best characterized on magnetic resonance imaging (MRI), include some combination of white matter hyperintensities, lacunes, cerebral microbleeds, enlarged perivascular spaces, and cerebral atrophy. Though some cohorts have reported that participants with type 2 diabetes mellitus (T2DM), an important risk factor for CSVD, may have a distinct neuroradiologic phenotype, this relationship is not well-characterized...
January 17, 2017: Systematic Reviews
https://www.readbyqxmd.com/read/28091885/assessing-the-impact-of-preload-on-pyrite-rich-sediment-and-groundwater-quality
#4
Ohene Karikari-Yeboah, Jonas Addai-Mensah
Pyrite-rich sediments would, invariably, undergo redox reactions which would lead to acidic aqueous environment containing solubilized toxic metal species. When such sediments are subjected to preload, a technique employed by geotechnical engineers to improve the load-bearing capacity of highly compressible formation, transient flow of pore water, accompanied by acidity transfer, would occur as a response. Despite the concomitant environmental and socio-economic significance, to date, there has been limited interdisciplinary research on the underpinning geotechnical engineering and geo-environmental science issues for pyrite-rich sediments under preload...
February 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28069307/finding-clean-water-habitats-in-urban-landscapes-professional-researcher-vs-citizen-science-approaches
#5
Elaine McGoff, Francesca Dunn, Luis Moliner Cachazo, Penny Williams, Jeremy Biggs, Pascale Nicolet, Naomi C Ewald
This study investigated patterns of nutrient pollution in waterbody types across Greater London. Nitrate and phosphate data were collected by both citizen scientists and professional ecologists and their results were compared. The professional survey comprised 495 randomly selected pond, lake, river, stream and ditch sites. Citizen science survey sites were self-selected and comprised 76 ponds, lakes, rivers and streams. At each site, nutrient concentrations were assessed using field chemistry kits to measure nitrate-N and phosphate-P...
January 7, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28068489/legumes-as-functional-ingredients-in-gluten-free-bakery-and-pasta-products
#6
Martina Foschia, Stefan W Horstmann, Elke K Arendt, Emanuele Zannini
The increasing demand of gluten-free food products from consumers has triggered food technologists to investigate a wide range of gluten-free ingredients from different sources to reproduce the unique network structure developed by gluten in a wheat-dough system. In recent times, the attention has been focused on novel application of legume flour or ingredients. The interest in this crop category is mainly attributed to their functional properties, such as solubility and water-binding capacity, which play an important role in gluten-free food formulation and processing...
January 4, 2017: Annual Review of Food Science and Technology
https://www.readbyqxmd.com/read/28067444/irreversible-conversion-of-a-water-ethanol-solution-into-an-organized-two-dimensional-network-of-alternating-supramolecular-units-in-a-hydrophobic-zeolite-under-pressure
#7
Rossella Arletti, Ettore Fois, Lara Gigli, Giovanna Vezzalini, Simona Quartieri, Gloria Tabacchi
Turning disorder into organization is a key issue in science. By making use of X-ray powder diffraction and modeling studies, we show herein that high pressures in combination with the shape and space constraints of the hydrophobic all-silica zeolite ferrierite separate an ethanol-water liquid mixture into ethanol dimer wires and water tetramer squares. The confined supramolecular blocks alternate in a binary two-dimensional (2D) architecture that remains stable upon complete pressure release. These results support the combined use of high pressures and porous networks as a viable strategy for driving the organization of molecules or nano-objects towards complex, pre-defined patterns relevant for the realization of novel functional nanocomposites...
January 9, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28062847/the-mucosal-barrier-at-a-glance
#8
REVIEW
Marion M France, Jerrold R Turner
Mucosal barriers separate self from non-self and are essential for life. These barriers, which are the first line of defense against external pathogens, are formed by epithelial cells and the substances they secrete. Rather than an absolute barrier, epithelia at mucosal surfaces must allow selective paracellular flux that discriminates between solutes and water while preventing the passage of bacteria and toxins. In vertebrates, tight junctions seal the paracellular space; flux across the tight junction can occur through two distinct routes that differ in selectivity, capacity, molecular composition and regulation...
January 6, 2017: Journal of Cell Science
https://www.readbyqxmd.com/read/28062106/medical-geology-in-the-framework-of-the-sustainable-development-goals
#9
REVIEW
Jochen Bundschuh, Jyoti Prakash Maity, Shahbaz Mushtaq, Meththika Vithanage, Saman Seneweera, Jerusa Schneider, Prosun Bhattacharya, Nasreen Islam Khan, Ihsan Hamawand, Luiz R G Guilherme, Kathryn Reardon-Smith, Faruque Parvez, Nury Morales-Simfors, Sara Ghaze, Christa Pudmenzky, Louis Kouadio, Chien-Yen Chen
Exposure to geogenic contaminants (GCs) such as metal(loid)s, radioactive metals and isotopes as well as transuraniums occurring naturally in geogenic sources (rocks, minerals) can negatively impact on environmental and human health. The GCs are released into the environment by natural biogeochemical processes within the near-surface environments and/or by anthropogenic activities such as mining and hydrocarbon exploitation as well as exploitation of geothermal resources. They can contaminate soil, water, air and biota and subsequently enter the food chain with often serious health impacts which are mostly underestimated and poorly recognized...
January 3, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28061525/a-fluorogenic-gold-nanoparticle-aunp-substrate-a-model-for-the-controlled-release-of-molecules-from-aunp-nanocarriers-via-interfacial-staudinger-bertozzi-ligation
#10
Wilson Luo, Pierangelo Gobbo, Praveen N Gunawardene, Mark Steven Workentin
The ability to regulate small molecule release from metallic nanoparticle substrates offers unprecedented opportunities for nanocarrier-based imaging, sensing, and drug delivery applications. Herein, we report a novel and highly specific release methodology off gold nanoparticle (AuNP) surfaces based on the bioorthogonal Staudinger-Bertozzi ligation. A thiol ligand bearing the molecular cargo - a Rhodamine B dye derivative - was synthesized and used to modify small water soluble 5 nm AuNPs. Upon incorporation into the AuNP monolayer, we observed efficient quenching of the dye emission, resulting in a very low level of fluorescence emission that provided the baseline from which cargo release was monitored...
January 6, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28059247/remote-raman-measurements-of-minerals-organics-and-inorganics-at-430%C3%A2-%C3%A2-m-range
#11
Tayro E Acosta-Maeda, Anupam K Misra, Lloyd G Muzangwa, Genesis Berlanga, Dalton Muchow, John Porter, Shiv K Sharma
Raman spectroscopy is a characterization technique that is able to analyze and detect water or water-bearing minerals, minerals, and organic materials that are of special interest for planetary science. Using a portable pulsed remote Raman system with a commercial 8 in. (203.2 mm) telescope, a frequency doubled Nd-YAG-pulsed laser, and a spectrometer equipped with an intensified CCD camera, we acquired good quality Raman spectra of various materials from a 430 m standoff distance during daylight with detection times of 1-10 s, in a realistic context in which both the exciting source and the detector are part of the same measurement system...
December 20, 2016: Applied Optics
https://www.readbyqxmd.com/read/28055205/interfacial-solvation-and-surface-ph-of-phenol-and-dihydroxybenzene-aqueous-nanoaerosols-unveiled-by-aerosol-vuv-photoelectron-spectroscopy
#12
Ping-Cheng Lin, Zhong-Hang Wu, Meng-Sin Chen, Yu-Lin Li, Wei-Ren Chen, Tzu-Ping Huang, Yin-Yu Lee, Chia C Wang
While the significance of aqueous interfaces has been recognized in numerous important fields, it can be even more prominent for nanoscaled aqueous aerosols due to their large surface-to-volume ratios and prevalent existence in nature. Also, considering that organic species are often mixed with aqueous aerosols in nature, a fundamental understanding on the electronic and structural properties of organic species in aqueous nanoaerosols is essential to learn the interplay between water and organic solutes under the nanoscaled size regime...
January 5, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28052398/multi-state-multi-stage-modeling-of-nest-success-suggests-interaction-between-weather-and-land-use
#13
Mark W Miller, David I Leech, James W Pearce-Higgins, Robert A Robinson
Many factors may affect daily nest survival. We present a novel multi-state, multi-stage model to estimate daily survival for each nest stage, daily hatching probability and probability that a failed nest died during a specific stage when stage of failure is unknown. The model does not require that hatching date be known. We used data from a large citizen science dataset to demonstrate the application of this approach, exploring the impact of laying dates, weather conditions, conserved soil moisture, soil carbon, habitat type and urbanization on failure rates of common blackbird (Turdus merula) nests...
January 2017: Ecology
https://www.readbyqxmd.com/read/28050472/use-of-lung-ultrasound-for-diagnosing-acute-heart-failure-in-emergency-department-of-southern-india
#14
Manav Aggarwal, Mrigakshi Gupta, Vikrant Vijan, Anjith Vupputuri, Sanjeev Chintamani, Bishnukiran Rajendran, Rajesh Thachathodiyal, Rajiv Chandrasekaran
INTRODUCTION: Diagnosing heart failure is often a challenge for the healthcare providers due to it's non-specific and usually subtle physical presentations. The outcomes for treatment are strongly related to the stage of the disease. Considering the importance of early and accurate diagnosis, it is important to have an easy, inexpensive, non-invasive, reliable and reproducible method for diagnosis of heart failure. Recent advancement in radiology and cardiology are supporting the emerging technique of lung ultrasound through B-line evaluation for identifying extravascular lung water...
November 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28048844/su-f-j-70-monte-carlo-study-on-a-cone-beam-computed-tomography-using-a-cross-type-carbon-fiber-antiscatter-grid
#15
K Usui, T Inoue, C Kurokawa, S Sugimoto, K Sasai, K Ogawa
PURPOSE: If a cone-beam computed tomography (CBCT) image can be used for adaptive radiotherapy (ART), an irradiated actual dose distribution can be verified on every treatment day. However, a CBCT image is commonly degraded by scattered photons and thus cannot be directly used for dose calculation. The purpose of the present study is to evaluate whether a cross-type carbon fiber antiscatter grid improves CBCT image quality using a Monte Carlo (MC) method for achieving CBCT-based ART. METHODS: We designed a new carbon fiber (C6 H10 O5 ) interspaced grid, which allows the grid ratio to be increased while maintaining the transmission of primary photons...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048646/tu-ab-brc-07-efficiency-of-an-iaea-phase-space-source-for-a-low-energy-x-ray-tube-using-egs
#16
Pgf Watson, M A Renaud, J Seuntjens
PURPOSE: To extend the capability of the EGSnrc C++ class library (egs++) to write and read IAEA phase-space files as a particle source, and to assess the relative efficiency gain in dose calculation using an IAEA phase-space source for modelling a miniature low energy x-ray source. METHODS: We created a new ausgab object to score particles exiting a user-defined geometry and write them to an IAEA phase-space file. A new particle source was created to read from IAEA phase-space data...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048565/th-ab-201-09
#17
L Mirzakhanian, H Benmakhlouf, J Seuntjens
PURPOSE: To determine the k_(Q_msr,Q)^(f_msr,f_ref) factor, introduced in the small field formalism for five common type chambers used in the calibration of Leksell Gamma-Knife Perfexion model over a range of different phantom electron densities. METHODS: Five chamber types including Exradin-A16, A14SL, A14, A1SL and IBA-CC04 are modeled in EGSnrc and PENELOPE Monte Carlo codes using the blueprints provided by the manufacturers. The chambers are placed in a previously proposed water-filled phantom and four 16-cm diameter spherical phantoms made of liquid water, Solid Water, ABS and polystyrene...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048023/tu-fg-brb-09-thermoacoustic-range-verification-with-perfect-co-registered-overlay-of-bragg-peak-onto-ultrasound-image
#18
S Patch, M Kireeff Covo, A Jackson, Y Qadadha, K Campbell, R Albright, P Bloemhard, A Donoghue, C Siero, T Gimpel, S Small, B Ninemire, M Johnson, L Phair
PURPOSE: The potential of particle therapy has not yet been fully realized due to inaccuracies in range verification. The purpose of this work was to correlate the Bragg peak location with target structure, by overlaying thermoacoustic localization of the Bragg peak onto an ultrasound image. METHODS: Pulsed delivery of 50 MeV protons was accomplished by a fast chopper installed between the ion source and the inflector of the 88″ cyclotron at Lawrence Berkeley National Lab...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047979/tu-ab-brc-08-egs_brachy-a-fast-and-versatile-monte-carlo-code-for-brachytherapy-applications
#19
M Chamberland, R Taylor, D Rogers, R Thomson
PURPOSE: To introduce egs_brachy, a new, fast, and versatile Monte Carlo code for brachytherapy applications. METHODS: egs_brachy is an EGSnrc user-code based on the EGSnrc C++ class library (egs++). Complex phantom, applicator, and source model geometries are built using the egs++ geometry module. egs_brachy uses a tracklength estimator to score collision kerma in voxels. Interaction, spectrum, energy fluence, and phase space scoring are also implemented. Phase space sources and particle recycling may be used to improve simulation efficiency...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047697/su-f-t-661-dependence-of-gold-nano-particles-cluster-morphology-on-dose-enhancement-of-photon-radiation-therapy-apply-for-radiation-biology-effect
#20
S Ahn, K Chung, Y Han, H Park
PURPOSE: Injected gold nano particles (GNPs) to a body for dose enhancement are known to form in the tumorcell cluster morphology. We investigated the dependence of dose enhancement on the morphology characteristic with an approximated morphology model by using Monte Carlo simulations. METHODS: For MC simulation, TOPAS version 2.0P-03 was used. GNP cluster morphology was approximated as a body center cubic(BCC) model by placing 8 GNPs at the corner and one at the center of cube with length from 2...
June 2016: Medical Physics
keyword
keyword
109054
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"