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https://www.readbyqxmd.com/read/29792679/a-nanozyme-and-ambient-light-based-smartphone-platform-for-simultaneous-detection-of-dual-biomarkers-from-exposure-to-organophosphorus-pesticides
#1
Yuting Zhao, Mingming Yang, Qiangqiang Fu, Hui Ouyang, Wei Wen, Yang Song, Chengzhou Zhu, Yuehe Lin, Dan Du
A transparent, lateral-flow test strip coupled with a smartphone-based ambient light sensor was first proposed for detect-ing enzymatic inhibition and phosphorylation. The principle of the platform is based on the simultaneous measurement of the total amount of the enzyme and enzyme activity to biomonitor exposure to organophosphorus (OP) pesticides. In this study, butyrylcholinesterase (BChE) was adopted as the model enzyme and ethyl paraoxon was chosen as an analyte representing OP pesticides. The total amount of BChE was quantified by a sensitive colorimetric signal originating from a sandwich immunochromatographic assay utilizing PtPd nanoparticles as a polyphenol oxidase-mimicking probe, which provided a higher sensitivity than that of a peroxidase-like probe...
May 24, 2018: Analytical Chemistry
https://www.readbyqxmd.com/read/29792677/ultra-low-power-smart-electronic-nose-system-based-on-three-dimensional-tin-oxide-nanotube-arrays
#2
Jiaqi Chen, Zhuo Chen, Farid Boussaid, Daquan Zhang, Xiaofang Pan, Huijuan Zhao, Amine Bermak, Chi-Ying Tsui, Xinran Wang, Zhiyong Fan
In this work, we present a high performance smart electronic nose (E-nose) system consisting of multiplexed tin dioxide (SnO2) nanotube sensor array, read-out circuit, wireless data transmission unit, mobile phone receiver and data processing application (App). Using the proposed nanotube sensor device structure in conjunction with multiple electrode materials, high sensitivity gas detection and discrimination have been achieved at room temperature, enabling a 1,000 times reduction of sensor's power consumption as compared to a conventional device using thin film SnO2...
May 24, 2018: ACS Nano
https://www.readbyqxmd.com/read/29789475/an-identity-based-anti-quantum-privacy-preserving-blind-authentication-in-wireless-sensor-networks
#3
Hongfei Zhu, Yu-An Tan, Liehuang Zhu, Xianmin Wang, Quanxin Zhang, Yuanzhang Li
With the development of wireless sensor networks, IoT devices are crucial for the Smart City; these devices change people's lives such as e-payment and e-voting systems. However, in these two systems, the state-of-art authentication protocols based on traditional number theory cannot defeat a quantum computer attack. In order to protect user privacy and guarantee trustworthy of big data, we propose a new identity-based blind signature scheme based on number theorem research unit lattice, this scheme mainly uses a rejection sampling theorem instead of constructing a trapdoor...
May 22, 2018: Sensors
https://www.readbyqxmd.com/read/29788698/electronic-media-exposure-and-use-among-toddlers
#4
Hyoung Yoon Chang, Eun-Jin Park, Hee-Jeong Yoo, Jee Won Lee, Yunmi Shin
Objective: These days, young children are exposed to a wide range of smart devices and their usage of smart devices is rapidly increasing worldwide. However, the use of smart devices by young children has not been studied in detail yet because smart device is relatively recent. The purpose of this study was to investigate the exposure status of smart devices among 2-5 years old children in Korea. Methods: Four hundred parents of 2- to 5-year-old children were invited to enroll...
May 24, 2018: Psychiatry Investigation
https://www.readbyqxmd.com/read/29787229/graphene-glass-inducing-multidomain-orientations-in-cholesteric-liquid-crystal-devices-toward-wide-viewing-angles
#5
Huihui Wang, Bingzhi Liu, Ling Wang, Xudong Chen, Zhaolong Chen, Yue Qi, Guang Cui, Huanhuan Xie, Yanfeng Zhang, Zhongfan Liu
The photonic reflection of a cholesteric liquid crystal (ChLC) device depends on the spatial distribution of the orientations of their helical axes, and many orientation techniques have been developed so far. In this study, we select the hybrids of graphene directly grown on quartz glass as platforms to construct ChLC-based devices. This special design makes graphene serve as both an alignment layer and a conductive layer, thus affording a more simplified device fabrication route. We reveal that multidomain structures can be evolved for ChLCs on polycrystalline monolayer graphene on quartz glass, as evidenced by polarized optical microscope characterizations...
May 24, 2018: ACS Nano
https://www.readbyqxmd.com/read/29786963/design-and-fabrication-of-printed-paper-based-hybrid-micro-supercapacitor-by-using-graphene-and-redox-active-electrolyte
#6
Bhawna Nagar, Deepak P Dubal, Luis Pires, Arben Merkoçi, Pedro Gómez-Romero
Inspired by future needs of flexible, simple, and low-cost energy storage devices, smart graphene-based micro-supercapacitors on conventional Xerox paper substrates were developed. The use of redox-active species (iodine redox couple) was explored to further improve the paper device's performance. The device based on printed graphene paper itself already had a remarkable maximum volumetric capacitance of 29.6 mF cm-3 (volume of whole device) at 6.5 mA cm-3 . The performance of the hybrid electrode with redox-active potassium iodide at the graphene surface was tested...
May 22, 2018: ChemSusChem
https://www.readbyqxmd.com/read/29786914/conductive-hydrogels-as-smart-materials-for-flexible-electronic-devices
#7
Qinfeng Rong, Wenwei Lei, Mingjie Liu
Flexible conductive materials have gained considerable research interest in recent years because of their potential applications in flexible energy storage devices, sensors, touch panels, electronic-skins, etc. With excellent flexibility, outstanding electric properties and tunable mechanical properties, conductive hydrogels as conductive materials offer plentiful insights and opportunities for flexible electronic devices. Numerous synthetic strategies have been developed to obtain various conductive hydrogels, and high-performance devices based on these conductive hydrogels have been realized...
May 22, 2018: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29780521/translating-molecular-detections-into-a-simple-temperature-test-using-a-target-responsive-smart-thermometer
#8
Jingjing Zhang, Hang Xing, Yi Lu
While it has been well recognized that affordable and pocket-size devices play a major role in environmental monitoring, food safety and medical diagnostics, it often takes a tremendous amount of resources to develop such devices. Devices that have been developed are often dedicated devices that can detect only one or a few targets. To overcome these limitations, we herein report a novel target-responsive smart thermometer for translating molecular detection into a temperature test. The sensor system consists of a functional DNA-phospholipase A2 (PLA2 ) enzyme conjugate, a liposome-encapsulated NIR dye, and a thermometer interfaced with a NIR-laser device...
April 28, 2018: Chemical Science
https://www.readbyqxmd.com/read/29775384/iv-smart-pumps-and-error-prone-programming-tasks-comparison-of-four-devices
#9
Karen K Giuliano
No abstract text is available yet for this article.
January 2018: Biomedical Instrumentation & Technology
https://www.readbyqxmd.com/read/29774612/elastic-fiber-supercapacitors-for-wearable-energy-storage
#10
REVIEW
Si Qin, Shayan Seyedin, Jizhen Zhang, Zhiyu Wang, Fangli Yang, Yuqing Liu, Jun Chen, Joselito M Razal
The development of wearable devices such as smart watches, intelligent garments, and wearable health-monitoring devices calls for suitable energy storage devices which have matching mechanical properties and can provide sufficient power for a reasonable duration. Stretchable fiber-based supercapacitors are emerging as a promising candidates for this purpose because they are lightweight, flexible, have high energy and power density, and the potential for easy integration into traditional textile processes. An important characteristic that is oftentimes ignored is stretchability-fiber supercapacitors should be able to accommodate large elongation during use, endure a range of bending motions, and then revert to its original form without compromising electrical and electrochemical performance...
May 17, 2018: Macromolecular Rapid Communications
https://www.readbyqxmd.com/read/29772989/a-systematic-review-of-all-smart-phone-applications-specifically-aimed-for-use-as-a-scoliosis-screening-tool
#11
Qais Naziri, Jadie Detolla, Westley Hayes, Steven Burekhovich, Andrew Merola, Chibukem Akamnanu, Carl B Paulino
The scoliometer is an inclinometer commonly used in scoliosis screening. The device is used during an Adam's forward bend test, in which a patient bends forward at the hips to measure deformity of the rib cage and spinal column. If a sufficient angle of rotation is measured, then the appropriate referrals and x-rays can be made and taken. This ubiquitous screening tool allows for a quick and simple scoliosis screening and is a mainstay of scoliosis management. With the advent and rapid improvement of smart phone technology, many scoliometer applications have become readily accessible...
2018: Journal of Long-term Effects of Medical Implants
https://www.readbyqxmd.com/read/29772779/sober-mcs-sociability-oriented-and-battery-efficient-recruitment-for-mobile-crowd-sensing
#12
Fazel Anjomshoa, Burak Kantarci
The Internet of Things (IoT) concept is aiming at being an integral part of the next generation networking services by introducing pervasiveness and ubiquitous interconnectivity of uniquely-identifiable objects. The massive availability of personalized smart devices such as smartphones and wearables enable their penetration into the IoT ecosystem with their built-in sensors, particularly in Mobile Crowd-Sensing (MCS) campaigns. The MCS systems achieve the objectives of the large-scale non-dedicated sensing concept in the IoT if a sufficient number of participants are engaged to the collaborative data acquisition process...
May 17, 2018: Sensors
https://www.readbyqxmd.com/read/29765298/real-time-tracking-of-selective-auditory-attention-from-m-eeg-a-bayesian-filtering-approach
#13
Sina Miran, Sahar Akram, Alireza Sheikhattar, Jonathan Z Simon, Tao Zhang, Behtash Babadi
Humans are able to identify and track a target speaker amid a cacophony of acoustic interference, an ability which is often referred to as the cocktail party phenomenon. Results from several decades of studying this phenomenon have culminated in recent years in various promising attempts to decode the attentional state of a listener in a competing-speaker environment from non-invasive neuroimaging recordings such as magnetoencephalography (MEG) and electroencephalography (EEG). To this end, most existing approaches compute correlation-based measures by either regressing the features of each speech stream to the M/EEG channels (the decoding approach) or vice versa (the encoding approach)...
2018: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29761197/facile-fabrication-of-thermo-redox-responsive-hydrogels-based-on-a-dual-crosslinked-matrix-for-a-smart-on-off-switch
#14
Na Sun, Panpan Sun, Aoli Wu, Xuanxuan Qiao, Fei Lu, Liqiang Zheng
Stimuli-responsive or "smart" soft materials have raised considerable attention due to their ability to spontaneously respond to external environmental variations and have a great potential for wide applications. Herein, a thermo/redox responsive hydrogel is facilely constructed based on a dual crosslinked matrix: the primary chemical crosslinked copolymer is composed of thermo-responsive poly(N-isopropylacrylamide) (PNIPAM) and poly(ionic liquid), and the secondary physical crosslinking component is generated by the ionic coordination between iron ions and carboxyl groups in the poly(ionic liquid)...
May 15, 2018: Soft Matter
https://www.readbyqxmd.com/read/29758958/the-non-contact-biometric-identified-bio-signal-measurement-sensor-and-algorithms
#15
Chan-Il Kim, Jong-Ha Lee
In these days, wearable devices have been developed for effectively measuring biological data. However, these devices have tissue allege and noise problem. To solve these problems, biometric measurement based on a non-contact method, such as face image sequencing is developed. This makes it possible to measure biometric data without any operation and side effects. However, it is impossible for a remote center to identify the person whose data are measured by the novel methods. In this paper, we propose the novel non-contact heart rate and blood pressure imaging system, Deep Health Eye...
April 25, 2018: Technology and Health Care: Official Journal of the European Society for Engineering and Medicine
https://www.readbyqxmd.com/read/29758404/a-prospective-blinded-evaluation-of-a-novel-sensing-methodology-designed-to-reduce-inappropriate-shocks-by-the-subcutaneous-implantable-defibrillator
#16
Dominic A M J Theuns, Tom F Brouwer, Paul Jones, Venugopal Allavatam, Steven Donnelley, Angelo Auricchio, Reinoud E Knops, Martin C Burke
BACKGROUND: The majority of inappropriate shocks from the subcutaneous implantable cardioverter-defibrillator (S-ICD) are caused by cardiac oversensing. A novel sensing methodology, SMART Pass (SP) aims to reduce cardiac oversensing. OBJECTIVE: To evaluate the effect of SP on shocks in ambulatory S-ICD patients. METHODS: Patients implanted in 2015-2016 and on remote monitoring were included and followed for one year. Shocks were adjudicated by three independent, blinded reviewers as appropriate or inappropriate...
May 11, 2018: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/29757494/multifunctional-smart-skin-adhesive-patches-for-advanced-health-care
#17
REVIEW
Insol Hwang, Hong Nam Kim, Minho Seong, Sang-Hyeon Lee, Minsu Kang, Hoon Yi, Won Gyu Bae, Moon Kyu Kwak, Hoon Eui Jeong
A skin adhesive patch is the most fundamental and widely used medical device for diverse health-care purposes. Conventional skin adhesive patches have been mainly utilized for routine medical purposes such as wound management, fixation of medical devices, and simple drug release. In contrast to traditional skin adhesive patches, recently developed patches incorporate multiple key functions of bulky medical devices into a thin, flexible patch based on emerging nanomaterials and flexible electronic technologies...
May 14, 2018: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/29750783/engineering-bacterial-motility-towards-hydrogen-peroxide
#18
Chelsea Virgile, Pricila Hauk, Hsuan-Chen Wu, Wu Shang, Chen-Yu Tsao, Gregory F Payne, William E Bentley
Synthetic biologists construct innovative genetic/biological systems to treat environmental, energy, and health problems. Many systems employ rewired cells for non-native product synthesis, while a few have employed the rewired cells as 'smart' devices with programmable function. Building on the latter, we developed a genetic construct to control and direct bacterial motility towards hydrogen peroxide, one of the body's immune response signaling molecules. A motivation for this work is the creation of cells that can target and autonomously treat disease, the latter signaled by hydrogen peroxide release...
2018: PloS One
https://www.readbyqxmd.com/read/29749014/3d-hybrid-small-scale-devices
#19
REVIEW
Jayson V Pagaduan, Anil Bhatta, Lewis H Romer, David H Gracias
Interfacing nano/microscale elements with biological components in 3D contexts opens new possibilities for mimicry, bionics, and augmentation of organismically and anatomically inspired materials. Abiotic nanoscale elements such as plasmonic nanostructures, piezoelectric ribbons, and thin film semiconductor devices interact with electromagnetic fields to facilitate advanced capabilities such as communication at a distance, digital feedback loops, logic, and memory. Biological components such as proteins, polynucleotides, cells, and organs feature complex chemical synthetic networks that can regulate growth, change shape, adapt, and regenerate...
May 10, 2018: Small
https://www.readbyqxmd.com/read/29748677/effect-of-iron-doping-on-protein-molecular-conductance
#20
Nikolai Lebedev, Igor Griva, Anders Blom, Leonard M Tender
Protein molecular conductance has attracted attention from researchers for the possibility of constructing innovative flexible biocompatible nanoscale electronic devices and smart hybrid materials. Due to protein complexity, most evaluations of protein conductivity are based on the simple estimation of protein's molecular orbital energy levels and spatial distributions without analysing its protein interaction with electrodes and the calculation of the rates of electron transfer (ET). In the present work, we included in our density functional theory (DFT) analysis an approach based on the non-equilibrium Green's function (NEGF) allowing for calculation from the first principles the molecular interaction with electrodes and thus the role of electrode materials, Fermi level, the thermal distribution of electronic energy levels, and the coupling efficiency between the molecule and the electrodes...
May 11, 2018: Physical Chemistry Chemical Physics: PCCP
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