keyword
MENU ▼
Read by QxMD icon Read
search

Sense

keyword
https://www.readbyqxmd.com/read/28651216/ultra-sensitive-suspended-atomically-thin-layered-black-phosphorus-mercury-sensors
#1
Peng Li, Dongzhi Zhang, Chuanxing Jiang, Xiaoqi Zong, Yuhua Cao
The extraordinary properties of black phosphorus (BP) make it a promising candidate for next-generation transistor chemical sensors. However, BP films reported so far are supported on substrate, and substrate scattering drastically deteriorates its electrical properties. Consequentially, the potential sensing capability of intrinsic BP is highly underestimated and its sensing mechanism is masked. Additionally, the optimum sensing regime of BP remains unexplored. This article is the first demonstration of suspended BP sensor operated in subthreshold regime...
June 15, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28651201/ex-situ-decoration-of-ordered-mesoporous-carbon-with-palladium-nanoparticles-via-polyoxometalates-and-for-sensitive-detection-of-acetaminophen-in-pharmaceutical-products
#2
Xiangyi Kong, Yeyu Wang, Qianqian Zhang, Tongrui Zhang, Qianqian Teng, Lei Wang, Huan Wang, Yufan Zhang
In this study, a facile and green method is described for decoration of ordered mesoporous carbon (OMC) with palladium nanoparticles (Pd NPs) through a polyoxometalates (POMs). Serving as both reducing and stabilizing agent, the Keggin-type POMs are used for synthesis of stable colloidal Pd NPs and then link them to the OMC at mild temperature. Current research focuses on the use of Pd-POMs-OMC as an effective sensing template for the detection of acetaminophen (AP) has been studied. Linear calibration curves in the range of 0...
June 20, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28651191/probing-safety-of-nanoparticles-by-outlining-sea-urchin-sensing-and-signaling-cascades
#3
Andi Alijagic, Annalisa Pinsino
Among currently identified issues presenting risks and benefits to human and ocean health, engineered nanoparticles (ENP) represent a priority. Predictions of their economic and social impact appear extraordinary, but their release in the environment at an uncontrollable rate is in striking contrast with the extremely limited number of studies on environmental impact, especially on the marine environment. The sea urchin has a remarkable sensing environmental system whose function and diversity came into focus during the recent years, after sea urchin genome sequencing...
June 23, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28651095/the-influence-of-performance-on-action-effect-integration-in-sense-of-agency
#4
Wen Wen, Atsushi Yamashita, Hajime Asama
Sense of agency refers to the subjective feeling of being able to control an outcome through one's own actions or will. Prior studies have shown that both sensory processing (e.g., comparisons between sensory feedbacks and predictions basing on one's motor intentions) and high-level cognitive/constructive processes (e.g., inferences based on one's performance or the consequences of one's actions) contribute to judgments of sense of agency. However, it remains unclear how these two types of processes interact, which is important for clarifying the mechanisms underlying sense of agency...
June 23, 2017: Consciousness and Cognition
https://www.readbyqxmd.com/read/28650815/joint-chroma-subsampling-and-distortion-minimization-based-luma-modification-for-rgb-color-images-with-application
#5
Kuo-Liang Chung, Tsu-Chun Hsu, Chi-Chao Huang
In this paper, we propose a novel and effective hybrid method, which joins the conventional chroma subsampling and the distortion-minimization based luma modification together, to improve the quality of the reconstructed RGB fullcolor image. Assume the input RGB full-color image has been transformed to a YUV image, prior to compression. For each 2×2 UV block, one 4:2:0 subsampling is applied to determine the one subsampled U and V components, Us and Vs. Based on Us, Vs, and the corresponding 2×2 original RGB block, a main theorem is provided to determine the ideally modified 2×2 luma block in constant time such that the color peak signalto- noise ratio (CPSNR) quality distortion between the original 2×2 RGB block and the reconstructed 2×2 RGB block can be minimized in a globally optimal sense...
June 26, 2017: IEEE Transactions on Image Processing: a Publication of the IEEE Signal Processing Society
https://www.readbyqxmd.com/read/28650802/translational-motion-tracking-of-leg-joints-for-enhanced-prediction-of-walking-tasks
#6
Roman Mark Stolyarov, Gary Burnett, Hugh Herr
OBJECTIVE: Prediction of walking tasks in powered leg prostheses is an important problem in the development of biomimetic prosthesis controllers. This article proposes a novel method to predict upcoming walking tasks by estimating the translational motion of leg joints using an inertial measurement unit. METHODS: We asked six subjects with unilateral transtibial amputations to traverse flat ground, ramps, and stairs using a powered prosthesis while inertial signals were remotely collected...
June 22, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28650637/a-dft-tddft-study-on-the-sensing-mechanism-of-a-fluorescent-probe-for-hydrogen-sulfide-excited-state-intramolecular-proton-transfer-coupled-twisted-intramolecular-charge-transfer
#7
Yang Li, Tian-Shu Chu
By using density functional theory (DFT) and time-dependent density functional theory (TDDFT) methods, the sensing mechanism of a fluorescent probe 2-(2-hydroxyphenyl) benzothiazole (HBT) derivative HBTPP-S for hydrogen sulfide has been thoroughly studied. The thiolysis reaction has a moderate reaction barrier of 18.40 kcal mol-1, which indicates that the hydrogen sulfide sensing process has a favorable response speed. Due to the non-radiative donor-excited photoinduced electron transfer (d-PET, fluorophore as the electron donor) from the excited HBTPP group to the electron-withdrawing 2,4-dinitrophenyl group, as well as the inhibition of the proton transfer (PT) and the excited state intramolecular proton transfer (ESIPT) process by 2,4-dinitrophenyl group, the probe HBTPP-S is essentially non-fluorescent...
June 26, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28650607/self-diffusion-driven-ultrafast-detection-of-ppm-level-nitro-aromatic-pollutants-in-aqueous-media-using-a-hydrophilic-fluorescent-paper-sensor
#8
Wei Lu, Jiawei Zhang, Youju Huang, Patrick Theato, Qing Huang, Tao Chen
Development of fluorescent film probes for toxic nitro aromatic compound pollutants (NACs) such as 2,4,6-trinitrotoluene (TNT) in real water samples implies broad applications in environmental and industrial safety control. Despite many recent advances, there are still some difficult challenges facing this area, e.g., the restricted sensitivity and long response time caused by hindered and slow diffusion of aqueous NACs samples inside a dense, solid film. Hence, we report herein a robust fluorescent paper sensor with improved sensing abilities, which is prepared by absorbing hydrophilic pyrene-functionalized polymer uniformly into cellulose-based filter papers...
June 26, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28650501/ph-responsive-near-infrared-fluorescent-cyanine-dyes-for-molecular-imaging-based-on-ph-sensing
#9
Koji Miki, Kentaro Kojima, Kazuaki Oride, Hiroshi Harada, Akiyo Morinibu, Kouichi Ohe
Indocyanine green (ICG) derivatives having nucleophilic substituents were synthesized as pH-responsive near-infrared dyes. pH-responsive dyes 1-C with closed-ring structures smoothly internalized and converted to emissive open-ring structures 1-O in response to relatively low pHs in acidic intracellular compartments of HeLa cells.
June 26, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28650498/two-step-fret-mediated-metal-ion-induced-signalling-responses-in-a-probe-appended-with-three-fluorophores
#10
Biswonath Biswal, Ajoy Pal, Bamaprasad Bag
A tri-fluorophoric molecular probe (1) with three different derivatized fluorophores, i.e. anthracene (An), 7-nitrobenz-2-oxa-1,3-diazole (NBD) and rhodamine-B (Rh) appended on to a Tren [tris-(2-aminoethyl)amine] receptor was demonstrated to exhibit metal ion induced ratiometric fluorescence signalling through the initiation of a two-step fluorescence resonance energy transfer (FRET) process owing to a compatible and substantial spectral overlap of electronic absorption and fluorescence of initial donor-intermediate donor/acceptor-final acceptor pairs...
June 26, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28650461/a-light-and-calcium-gated-transcription-factor-for-imaging-and-manipulating-activated-neurons
#11
Wenjing Wang, Craig P Wildes, Tanyaporn Pattarabanjird, Mateo I Sanchez, Gordon F Glober, Gillian A Matthews, Kay M Tye, Alice Y Ting
Activity remodels neurons, altering their molecular, structural, and electrical characteristics. To enable the selective characterization and manipulation of these neurons, we present FLARE, an engineered transcription factor that drives expression of fluorescent proteins, opsins, and other genetically encoded tools only in the subset of neurons that experienced activity during a user-defined time window. FLARE senses the coincidence of elevated cytosolic calcium and externally applied blue light, which together produce translocation of a membrane-anchored transcription factor to the nucleus to drive expression of any transgene...
June 26, 2017: Nature Biotechnology
https://www.readbyqxmd.com/read/28650444/nutrient-recycling-facilitates-long-term-stability-of-marine-microbial-phototroph-heterotroph-interactions
#12
Joseph A Christie-Oleza, Despoina Sousoni, Matthew Lloyd, Jean Armengaud, David J Scanlan
Biological interactions underpin the functioning of marine ecosystems, be it via competition, predation, mutualism or symbiosis processes. Microbial phototroph-heterotroph interactions propel the engine that results in the biogeochemical cycling of individual elements, and they are critical for understanding and modelling global ocean processes. Unfortunately, studies thus far have focused on exponentially growing cultures in nutrient-rich media, meaning knowledge of such interactions under in situ conditions is rudimentary at best...
June 26, 2017: Nature Microbiology
https://www.readbyqxmd.com/read/28650325/evaluation-of-three-plant-extracts-against-biofilm-formation-and-expression-of-quorum-sensing-regulated-virulence-factors-in-pseudomonas-aeruginosa
#13
Vajihe Karbasizade, Parichehr Dehghan, Maryam Mohammadi Sichani, Kahin Shahanipoor, Reyhaneh Jafari, Rozita Yousefian
Following the increasing antibiotic resistance of pathogenic bacteria, the use of medicinal herbs as antibacterial agents has attracted growing attention. Pseudomonas aeruginosa is a human opportunistic pathogen that uses quorum sensing for regulating virulence gene expression (pyocyanin, protease, and elastase production and biofilm formation). This study examined the anti-quorum sensing activity of Quercus infectoria, Zataria multiflora and Trachyspermum copticum extracts on standard P. aeruginosa strain...
March 2017: Pakistan Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28650315/transient-acidosis-while-retrieving-a-fear-related-memory-enhances-its-lability
#14
Jianyang Du, Margaret P Price, Rebecca J Taugher, Daniel Grigsby, Jamison J Ash, Austin C Stark, Md Zubayer Hossain Saad, Kritika Singh, Juthika Mandal, John A Wemmie, Michael J Welsh
Attenuating the strength of fearful memories could benefit people disabled by memories of past trauma. Pavlovian conditioning experiments indicate that a retrieval cue can return a conditioned aversive memory to a labile state. However, means to enhance retrieval and render a memory more labile are unknown. We hypothesized that augmenting synaptic signaling during retrieval would increase memory lability. To enhance synaptic transmission, mice inhaled CO2 to induce an acidosis and activate acid sensing ion channels...
June 26, 2017: ELife
https://www.readbyqxmd.com/read/28650070/the-human-ventilatory-response-to-stress-rate-or-depth
#15
Michael J Tipton, Abbi Harper, Julian F R Paton, Joseph T Costello
Many stressors cause an increase in ventilation in humans. This is predominantly reported as an increase in minute ventilation (V̇E ). But, the same V̇E can be achieved by a wide variety of changes in the depth (tidal volume, VT ) and number of breaths (respiratory frequency, ƒR). This review investigates the impact of stressors including: cold, heat, hypoxia, pain and panic on the contributions of ƒR and VT to V̇E to see if they differ with different stressors. Where possible we also consider the potential mechanisms that underpin the responses identified, and propose mechanisms by which differences in ƒR and VT are mediated...
June 26, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28650057/enhanced-catalytic-activity-and-near-room-temperature-gas-sensing-properties-of-sno2-nanoclusters-mesoporous-sn-iv-organophosphonate-composite
#16
Suchibrata Borah, Bagmita Bhattacharyya, Jumi Deka, Aditya Borah, Anuchaya Devi, Dhanapati Deka, Shashank Mishra, Kalyan Raidongia, Nayanmoni Gogoi
A simple, facile and one-pot route for preparing SnO2 nanoclusters embedded on a mesoporous Sn(iv) organophosphonate (MSnP) framework is described. Reaction of SnCl4·5H2O with a flexible tris-phosphonic acid, mesityl-1,3,5-tris(methylenephosphonic acid), in the presence of a surfactant under hydrothermal conditions produced the desired nanocomposite, SnO2@MSnP. Analytical, spectroscopic and microscopic studies establish that SnO2@MSnP composite is comprised of SnO2 nanoparticles of an average size of 5 nm evenly and abundantly dispersed over the MSnP framework...
June 26, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28650007/dual-channel-signals-for-intracellular-mrna-detection-via-a-pret-nanosensor
#17
Tao Xie, Meng Li, Yi-Tao Long
An intracellular nanosensor was designed and developed to accurately sense mRNA in living cells without false positive results. This nanosensor consists of gold nanoparticles assembled with recognition sequences and dye-labelled nanoflares. By analyzing both the wavelength shifts and intensity recovery of the scattering spectra, this dual-channel nanosensor could efficiently distinguish and avoid the interference induced by other common substances. This novel dual-channel nanosensor would precisely recognize the target mRNA, and it is promising for further cancer diagnoses...
June 26, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28649962/biological-sensing-using-hybridization-phase-of-plasmonic-resonances-with-photonic-lattice-modes-in-arrays-of-gold-nanoantennas
#18
Rithvik Reddy Gutha, Seyed M Sadeghi, Christina Sharp, Waylin J Wing
We study biological sensing using the hybridization phase of localized surface plasmon resonances (LSPRs) with diffraction modes (photonic lattice modes) in arrays of gold nanoantennas. We map the degree of the hybridization process using an embedding dielectric material (Si), identifying the critical thicknesses wherein the optical responses of the arrays are mainly governed by pure LSPRs (insignificant hybridization), Fano-type coupling of LSPRs with diffraction orders (hybridization state), and their intermediate state (hybridization phase)...
June 26, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28649874/a-web-application-for-evaluating-phase-i-methods-using-a-non-parametric-optimal-benchmark
#19
Nolan A Wages, Nikole Varhegyi
BACKGROUND/AIMS: In evaluating the performance of Phase I dose-finding designs, simulation studies are typically conducted to assess how often a method correctly selects the true maximum tolerated dose under a set of assumed dose-toxicity curves. A necessary component of the evaluation process is to have some concept for how well a design can possibly perform. The notion of an upper bound on the accuracy of maximum tolerated dose selection is often omitted from the simulation study, and the aim of this work is to provide researchers with accessible software to quickly evaluate the operating characteristics of Phase I methods using a benchmark...
June 1, 2017: Clinical Trials: Journal of the Society for Clinical Trials
https://www.readbyqxmd.com/read/28649828/dimerization-of-the-conserved-n-terminal-domain-of-a-spider-silk-protein-controls-the-self-assembly-of-the-repetitive-core-domain
#20
Joschka Bauer, Thomas Scheibel
Spider silk proteins comprise a repetitive core domain with polyalanine and glycine/proline stretches flanked by highly conserved nonrepetitive N- and C-terminal domains. The termini are responsive to assembly triggers, sensing changes in the ionic (H+, phosphate) and mechanical (shear stress) environment along the spinning duct. Upon assembly, the N-terminal domain dimerizes in a pH-dependent manner induced by protonation of conserved acidic residues. So far, dimerization of N-terminal spider silk domains has been individually investigated in the absence of large core domains...
June 26, 2017: Biomacromolecules
keyword
keyword
120695
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"