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https://read.qxmd.com/read/30772539/emission-characteristics-of-parent-and-halogenated-pahs-in-simulated-municipal-solid-waste-incineration
#1
Hong-Ying Li, Pan-Pan Gao, Hong-Gang Ni
With a self-designed small-scale waste incinerator, emission behaviors of parent and halogenated polycyclic aromatic hydrocarbons (PAHs and HPAHs) were simulated and visualized. According to our results, the 2-3 ring PAHs have higher emission factors (EFs) than those of the 4-6 ring PAHs during waste incineration. The EFs of individual HPAHs are comparable in all incineration products. Overall, the EFs of Ʃ16 PAH and Ʃ3 ClPAH decreased in the order of gas > bottom ash > particle > fine particle while the EF order for Ʃ6 BrPAH is bottom ash > particle > gas > fine particle...
February 1, 2019: Science of the Total Environment
https://read.qxmd.com/read/30771097/sers-based-chip-for-discrimination-of-formaldehyde-and-acetaldehyde-in-aqueous-solution-using-silver-reduction
#2
Huazhen Duan, Wei Deng, Zhenfei Gan, Dan Li, Dawei Li
A method is described for surface-enhanced Raman scattering (SERS) discrimination of formaldehyde (FA) and acetaldehyde (AA) in aqueous sample solutions. It is based on the use of a paper strip containing 4-aminothiophenol (Atp)-modified reduced graphene oxide (rGO)/[Ag(NH3 )2 ]+ (rGO/[Ag(NH3 )2 ]+ /Atp). The addition of FA or AA induces the conversion of [Ag(NH3 )2 ]+ complex to silver nanoparticles (AgNPs) because of aldehyde-induced silver reduction reaction. The AgNPs possess strong SERS activity. The average interparticle gaps between the AgNPs can be fine-tuned by controlling the experimental conditions, this leading to the formation of optimized SERS hot spots...
February 15, 2019: Mikrochimica Acta
https://read.qxmd.com/read/30768042/high-resolution-femtosecond-laser-beam-shaping-via-digital-holography
#3
Yiming Guo, Yu Wang, Qinglei Hu, Xiaohua Lv, Shaoqun Zeng
We propose a method to achieve high-resolution femtosecond laser beam shaping (HR-FLBS) via digital holography based on a digital mirror device (DMD) and optimized optical design. By programming the hologram on the DMD, we captured several patterns such as light spots, decorated letters of "HUST" (Huazhong University of Science and Technology), and a series of concentric annuli whose fine structure approaches the optical diffraction limit. The experimental results confirm that the proposed method can shape the amplitude and phase of a femtosecond laser arbitrarily with high resolution...
February 15, 2019: Optics Letters
https://read.qxmd.com/read/30767915/synthesis-of-a-novel-visible-light-responsive-%C3%AE-fe-2-o-3-sio-2-c-tio-2-magnetic-nanocomposite-for-water-treatment
#4
Henry H Mungondori, Spencer Ramujana, David M Katwire, Raymond T Taziwa
This work investigates the preparation of a magnetically recoverable photocatalytic nanocomposite of maghemite nanoparticles coated with silica and carbon doped titanium dioxide. The novel nanocomposite boasts the advantages of efficient photocatalytic degradation of organic pollutants in water and ease of recovery of the fine particles after water treatment. The photocatalytic nanocomposite was successfully synthesized through a stepwise approach via co-precipitation and sol-gel methods. Characterisation by Fourier transform infrared (FTIR), X-ray diffraction (XRD), transmission electron microscopy (TEM) and energy dispersive spectroscopy (EDS) substantiated the existence of the intended structure of the nanocomposite and the particles were found to be in the size range of 15-22 nm with a quasi-spherical shape...
December 2018: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://read.qxmd.com/read/30767905/a-framework-for-analyzing-and-measuring-usage-and-engagement-data-amused-in-digital-interventions-viewpoint
#5
Sascha Miller, Ben Ainsworth, Lucy Yardley, Alex Milton, Mark Weal, Peter Smith, Leanne Morrison
Trials of digital interventions can yield extensive, in-depth usage data, yet usage analyses tend to focus on broad descriptive summaries of how an intervention has been used by the whole sample. This paper proposes a novel framework to guide systematic, fine-grained usage analyses that better enables understanding of how an intervention works, when, and for whom. The framework comprises three stages to assist in the following: (1) familiarization with the intervention and its relationship to the captured data, (2) identification of meaningful measures of usage and specifying research questions to guide systematic analyses of usage data, and (3) preparation of datasheets and consideration of available analytical methods with which to examine the data...
February 15, 2019: Journal of Medical Internet Research
https://read.qxmd.com/read/30765633/-current-status-and-future-prospects-of-minimally-invasive-and-function-preserving-surgery
#6
Kazuto Matsuura
The keywords of surgical treatment in the 21st century are "minimally invasive" and "function preserved". "Laryngeal function" is important in the head and neck region. The goal of laryngeal function preservation surgery is to be able to talk on "telephone" (vocalization function), to be able to "eat out" (chewing/swallowing function), "bath to shoulder" (nasal respiration function). Minimally invasive surgery and function-preserving surgery for head and neck cancer have been developed mainly for transoral surgery...
January 2019: Gan to Kagaku Ryoho. Cancer & Chemotherapy
https://read.qxmd.com/read/30765009/high-throughput-bar-coating-processed-organic-inorganic-hybrid-multi-layers-for-gas-barrier-thin-films
#7
Joohyung Park, Jong Kook Won, Jun-Gu Park, Seungwoo Yu, Jihyun An, Jongin Hong, Choongik Kim, Kang-Jun Baeg, Myung-Gil Kim
Herein, we demonstrate the preparation of a scalable bar-coated nanocomposite organic-inorganic hybrid film and developed robust barrier films for general purpose packaging. Using combinatory printing of polymers and nanocomposites by bar coating, a facile and effective barrier film fabrication method was developed. Based on a preliminary survey with several material combinations, a rationalized two-fold nanocomposite film was fabricated. The number of layers in the barrier film significantly modified oxygen barrier performance such that, for the 1 wt% ethylene vinyl alcohol (EVOH) intercalated film, the oxygen transmission rate (OTR) of the 5-layer sample was reduced to 31...
July 1, 2019: Journal of Nanoscience and Nanotechnology
https://read.qxmd.com/read/30764952/characterization-of-hot-deformation-behavior-of-nanosized-al%C3%A2-o%C3%A2-reinforced-al6061-composites
#8
Kyu Ho Yeon, Hyun Soon Park, Mok Soon Kim, Seung Baek Yu, Jeong Keun Lee
The hot deformation behavior of Al6061/Nano-Al₂O₃ composites were investigated at temperatures of 300 to 500 °C and strain rates of 0.001∼1/s using compression tests. The composite fabricated by the infiltration method consisted of an Al matrix and Al₂O₃ particles with a mean size of 200 nm. Interestingly, the true stress-true strain curves under all compressive conditions showed a peak stress at the initial stages of deformation, in which the peak stress increased with decreasing temperature and faster strain rate...
July 1, 2019: Journal of Nanoscience and Nanotechnology
https://read.qxmd.com/read/30763080/ranking-reversible-covalent-drugs-from-free-energy-perturbation-to-fragment-docking
#9
Han Zhang, Wenjuan Jiang, Payal Chatterjee, Yun Luo
Reversible covalent inhibitors have drawn increasing attention in drug design, as they are likely more potent than noncovalent inhibitors and less toxic than covalent inhibitors. Despite those advantages, the computational prediction of reversible covalent binding presents a formidable challenge because the binding process consists of multiple steps and quantum mechanics (QM) level calculation is needed to estimate the covalent binding free energy. It has been shown that the dissociation rates and the equilibrium dissociation constants vary significantly even with similar warheads, due to noncovalent interactions...
February 14, 2019: Journal of Chemical Information and Modeling
https://read.qxmd.com/read/30762559/modulating-fine-roughness-perception-of-vibrotactile-textured-surface-using-pseudo-haptic-effect
#10
Yusuke Ujitoko, Yuki Ban, Koichi Hirota
Playing back vibrotactile signals through actuators is commonly used to simulate tactile feelings of virtual textured surfaces. However, there is often a small mismatch between the simulated tactile feelings and intended tactile feelings by tactile designers. Thus, a method of modulating the vibrotactile perception is required. We focus on fine roughness perception and we propose a method using a pseudo-haptic effect to modulate fine roughness perception of vibrotactile texture. Specifically, we visually modify the pointer's position on the screen slightly, which indicates the touch position on textured surfaces...
February 14, 2019: IEEE Transactions on Visualization and Computer Graphics
https://read.qxmd.com/read/30762055/rational-design-of-an-ionic-liquid-dispersive-liquid-liquid-micro-extraction-method-for-the-detection-of-organophosphorus-pesticides
#11
Dingkun Lu, Chang Liu, Jingjing Deng, Xinguang Zhou, Guoyue Shi, Tianshu Zhou
In this study, a functionalized ionic liquid (IL), 3-methyl-1-(ethoxycarbonylmethyl) imidazolium bis(trifluoromethylsulfonyl)-imide ([MimCH2COOCH3][NTf2]), was rationally designed and explored as an extraction solvent in dispersive liquid-liquid microextraction (DLLME) combined with ultra-high performance liquid chromatography (UHPLC) for the sensitive determination of organophosphorus pesticides (OPs). As π-π stacking interaction between the parent imidazolium cation core and the OPs is one of the most important factors, the proposed IL exhibited a high extraction efficiency...
February 14, 2019: Analyst
https://read.qxmd.com/read/30762047/performance-tuning-of-microfluidic-flow-focusing-droplet-generators
#12
Ali Lashkaripour, Christopher Rodriguez, Luis Ortiz, Douglas Densmore
The required step in all droplet-based devices is droplet formation. A droplet generator must deliver an application-specific performance that includes a prescribed droplet size and generation frequency while producing monodisperse droplets. The desired performance is usually reached through several cost- and time-inefficient design iterations. To address this, we take advantage of a low-cost rapid prototyping method and provide a framework that enables researchers to make informed decisions on how to change geometric parameters and flow conditions to tune the performance of a microfluidic flow-focusing droplet generator...
February 14, 2019: Lab on a Chip
https://read.qxmd.com/read/30759985/influence-of-the-protein-environment-on-the-electronic-excitation-of-chromophores-in-the-phycoerythrin-545-light-harvesting-complex-a-combined-md-qm-mm-method-with-polarized-protein-specific-charge-scheme
#13
Zhengqing Tong, Zhe Huai, Ye Mei, Yan Mo
To gain better insight into how the fluctuating protein environment influences the site energy ordering of the chromophores in PE545 light-harvesting antenna system, we carried out quantum-mechanics/molecular-mechanics (QM/MM) calculations along the molecular dynamics (MD) trajectory. The Polarized Protein-specific Charge (PPC) scheme was adopted in both the MD simulation and the QM/MM calculations for a more realistic description of the protein environment. The deduced site energy ladder calculated using ZINDO/S-CIS agrees well with the best model extracted from experiments by a simultaneous fit of the steady-state spectra and transient absorption spectra...
February 13, 2019: Journal of Physical Chemistry. B
https://read.qxmd.com/read/30759776/the-use-of-geonarratives-to-add-context-to-fine-scale-geospatial-research
#14
Jayakrishnan Ajayakumar, Andrew Curtis, Steve Smith, Jacqueline Curtis
There has been a move towards using mixed method approaches in geospatial research to gain context in understanding health related social patterns and processes. The central premise is that official data is often too reductionist and misses' nuances that can help explain causality. One example is the geonarrative, a spatially relevant commentary or interview that can be mapped by content and/or location. While there have been several examples of geonarratives being used by researchers, there is no commonly available software that can easily transfer the associated text into spatial data...
February 12, 2019: International Journal of Environmental Research and Public Health
https://read.qxmd.com/read/30759751/fabrication-of-porous-materials-by-spark-plasma-sintering-a-review
#15
REVIEW
Dina V Dudina, Boris B Bokhonov, Eugene A Olevsky
Spark plasma sintering (SPS), a sintering method that uses the action of pulsed direct current and pressure, has received a lot of attention due to its capability of exerting control over the microstructure of the sintered material and flexibility in terms of the heating rate and heating mode. Historically, SPS was developed in search of ways to preserve a fine-grained structure of the sintered material while eliminating porosity and reaching a high relative density. These goals have, therefore, been pursued in the majority of studies on the behavior of materials during SPS...
February 12, 2019: Materials
https://read.qxmd.com/read/30759313/comprehensive-analysis-of-laserscanner-validity-used-for-measurement-of-wear
#16
Shu-Min Hsu, Fan Ren, Nader Abdulhameed, Mijin Kim, Dan Neal, Josephine Esquivel-Upshaw
OBJECTIVES: The aims of this study were to test the hypotheses that (1) a laser scanner used for measuring maximum depth and volume loss will yield the same results as a surface profilometer; (2) the surface roughness will affect the maximum depth and volume loss measured with the laserscanner; (3) analytical results using the laserscanner from multiple operators have no more than 10% inter-rater difference; (4) replicating samples using either stone or impression material is an accurate method for measuring wear using the laserscanner...
February 13, 2019: Journal of Oral Rehabilitation
https://read.qxmd.com/read/30756261/mouse-tracking-as-a-window-into-decision-making
#17
Mora Maldonado, Ewan Dunbar, Emmanuel Chemla
Mouse tracking promises to be an efficient method to investigate the dynamics of cognitive processes: It is easier to deploy than eyetracking, yet in principle it is much more fine-grained than looking at response times. We investigated these claimed benefits directly, asking how the features of decision processes-notably, decision changes-might be captured in mouse movements. We ran two experiments, one in which we explicitly manipulated whether our stimuli triggered a flip in decision, and one in which we replicated more ecological, classical mouse-tracking results on linguistic negation (Dale & Duran, Cognitive Science, 35, 983-996, 2011)...
February 12, 2019: Behavior Research Methods
https://read.qxmd.com/read/30755831/digging-for-dna-at-depth-rapid-universal-metabarcoding-surveys-rums-as-a-tool-to-detect-coral-reef-biodiversity-across-a-depth-gradient
#18
Joseph D DiBattista, James D Reimer, Michael Stat, Giovanni D Masucci, Piera Biondi, Maarten De Brauwer, Michael Bunce
Background: Effective biodiversity monitoring is fundamental in tracking changes in ecosystems as it relates to commercial, recreational, and conservation interests. Current approaches to survey coral reef ecosystems center on the use of indicator species and repeat surveying at specific sites. However, such approaches are often limited by the narrow snapshot of total marine biodiversity that they describe and are thus hindered in their ability to contribute to holistic ecosystem-based monitoring...
2019: PeerJ
https://read.qxmd.com/read/30754011/the-role-of-gangue-on-the-mitigation-of-mining-induced-hazards-and-environmental-pollution-an-experimental-investigation
#19
Dan Ma, Hongyu Duan, Jiangfeng Liu, Xibing Li, Zilong Zhou
Gangue, produced from coal mining and washing process, is a serious threat to the ground environment. Gangue backfilling mining method can solve this problem and reduce mining-induced hazards, e.g., controlling surface subsidence and preventing water inrush from seeping into goaf by cracks in overlying strata. In this paper, effects of the original particle size distribution (PSD) and water content on the particle crushing behavior and seepage properties of granular gangues were investigated. Experimental results show that the crushing behavior can promote the compaction of gangue particles; the variation of PSD after crushing reveals distinct fractal characteristics...
February 5, 2019: Science of the Total Environment
https://read.qxmd.com/read/30753947/confirm-or-refute-a-comparative-study-on-citation-sentiment-classification-in-clinical-research-publications
#20
Halil Kilicoglu, Zeshan Peng, Shabnam Tafreshi, Tung Tran, Graciela Rosemblat, Jodi Schneider
Quantifying scientific impact of researchers and journals relies largely on citation counts, despite the acknowledged limitations of this approach. The need for more suitable alternatives has prompted research into developing advanced metrics, such as h-index and Relative Citation Ratio (RCR), as well as better citation categorization schemes to capture the various functions that citations serve in a publication. One such scheme involves citation sentiment: whether a reference paper is cited positively (agreement with the findings of the reference paper), negatively (disagreement), or neutrally...
February 9, 2019: Journal of Biomedical Informatics
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