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https://www.readbyqxmd.com/read/28938786/prediction-of-egg-freshness-during-storage-using-electronic-nose
#1
Samuel M Yimenu, J Y Kim, B S Kim
The aim of the present study was to investigate the potential of a fast gas chromatography (GC) e-nose for freshness discrimination and for prediction of storage time as well as sensory and internal quality changes during storage of hen eggs. All samples were obtained from the same egg production farm and stored at 20 °C for 20 d. Egg sampling was conducted every 0, 3, 6, 9, 12, 16, and 20 d. During each sampling time, 4 egg cartons (each containing 10 eggs) were randomly selected: one carton for Haugh units, one carton for sensory evaluation and 2 cartons for the e-nose experiment...
October 1, 2017: Poultry Science
https://www.readbyqxmd.com/read/28938308/sensor-based-physiologic-control-strategy-for-biventricular-support-with-rotary-blood-pumps
#2
Yu Wang, Steven C Koenig, Zhongjun Wu, Mark S Slaughter, Guruprasad A Giridharan
Rotary biventricular assist devices (BiVAD) are becoming a clinically accepted treatment option for end-stage biventricular failure. To improve BiVAD efficacy and safety, we propose a control algorithm to achieve the clinical objectives of maintaining left-right-sided balance, restoring physiologic flows, and preventing ventricular suction. The control algorithm consists of two proportional-integral (PI) controllers for left and right ventricular assist devices (LVAD and RVAD) to maintain differential pump pressure across LVAD (ΔPL) and RVAD (ΔPR) to provide left-right balance and physiologic flow...
September 21, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28938305/a-useful-device-to-measure-kinetics-of-platelet-contraction
#3
Mitchell J George, Kevin R Aroom, Max A Skibber, Tushar Sharma, Charles E Wade, Charles S Cox, Brijesh S Gill
Platelet contraction provides a minimally invasive source for physiologic information. In this article, we describe a device that directly measures the kinetics of platelet contraction. Whole blood is injected between acrylic plates and an adherent clot forms. The bottom plate is fixed, and the top plate is attached to a wire cantilever. Platelet contraction drives deflection of the wire cantilever which is captured by a camera. Force generated by the clot with time is derived using beam equations. Force derivations were verified using a microelectromechanical (MEMS) force sensor...
September 21, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28938019/fabrication-of-3-methoxyphenol-sensor-based-on-fe3o4-decorated-carbon-nanotube-nanocomposites-for-environmental-safety-real-sample-analyses
#4
Mohammed M Rahman, Mohammad Musarraf Hussain, Abdullah M Asiri
Iron oxide ornamented carbon nanotube nanocomposites (Fe3O4.CNT NCs) were prepared by a wet-chemical process in basic means. The optical, morphological, and structural characterizations of Fe3O4.CNT NCs were performed using FTIR, UV/Vis., FESEM, TEM; XEDS, XPS, and XRD respectively. Flat GCE had been fabricated with a thin-layer of NCs using a coating binding agent. It was performed for the chemical sensor development by a dependable I-V technique. Among all interfering analytes, 3-methoxyphenol (3-MP) was selective towards the fabricated sensor...
2017: PloS One
https://www.readbyqxmd.com/read/28937782/cold-water-immersion-cooling-rates-in-football-linemen-and-cross-country-runners-with-exercise-induced-hyperthermia
#5
Sandra Fowkes Godek, Katherine E Morrison, Gregory Scullin
CONTEXT:   Ideal and acceptable cooling rates in hyperthermic athletes have been established in average-sized participants. Football linemen (FBs) have a small body surface area (BSA) to mass ratio compared with smaller athletes, which hinders heat dissipation. OBJECTIVE:   To determine cooling rates using cold-water immersion in hyperthermic FBs and cross-country runners (CCs). DESIGN:   Cohort study. SETTING:   Controlled university laboratory...
September 22, 2017: Journal of Athletic Training
https://www.readbyqxmd.com/read/28937737/hollow-pd-ag-composite-nanowires-for-fast-responding-and-transparent-hydrogen-sensors
#6
Ji-Soo Jang, Shaopeng Qiao, Seon-Jin Choi, Gaurav Jha, Alana F Ogata, Won-Tae Koo, Dong-Ha Kim, Il-Doo Kim, Reginald M Penner
Pd based alloy materials with hollow nanostructures are ideal hydrogen (H2) sensor building blocks because of the ultra-high surface area afforded by this architecture. In this work, for the first time, we report a simple fabrication process for preparing hollow Pd-Ag alloy nanowires (Pd@Ag HNWs) by using the electrodeposition of lithographically patterned silver nanowires and followed galvanic replacement reaction (GRR) to form palladium. By controlling the GRR time of aligned Ag NWs within an aqueous Pd2+-containing solution, the compositional transition and morphological evolution from Ag NWs to Pd@Ag HNWs simultaneously occurred, and the relative atomic ratio between Pt and Ag was controlled...
September 22, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28937733/surface-engineering-of-graphene-composite-transparent-electrodes-for-high-performance-flexible-triboelectric-nanogenerators-and-self-powered-sensors
#7
Jun Yang, Peibo Liu, Xingzhan Wei, Wei Luo, Jin Yang, Hao Jiang, Dapeng Wei, Ruiying Shi, Haofei Shi
A high performance transparent and flexible triboelectric nanogenerator (TENG) based on graphene composite electrodes via surface engineering is proposed and demonstrated. Through modifying the CVD-grown graphene by conductive polymer poly(3,4-ethylenedioxy-thiophene):polystyrenesulfonate (PEDOT:PSS), the composite electrodes with excellent optoelectronic performances were fabricated, which exhibited a high transmittance up to 85% and sheet resistance of 85 Ω/□ decreasing from the initial value of 725 Ω/□...
September 22, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28937660/a-low-power-consumption-algorithm-for-efficient-energy-consumption-in-zigbee-motes
#8
Daniel Vaquerizo-Hdez, Pablo Muñoz, María D R-Moreno, David F Barrero
Wireless Sensor Networks (WSNs) are becoming increasingly popular since they can gather information from different locations without wires. This advantage is exploited in applications such as robotic systems, telecare, domotic or smart cities, among others. To gain independence from the electricity grid, WSNs devices are equipped with batteries, therefore their operational time is determined by the time that the batteries can power on the device. As a consequence, engineers must consider low energy consumption as a critical objective to design WSNs...
September 22, 2017: Sensors
https://www.readbyqxmd.com/read/28937649/synthesis-and-enhanced-ethanol-gas-sensing-properties-of-the-g-c%C3%A2-n%C3%A2-nanosheets-decorated-tin-oxide-flower-like-nanorods-composite
#9
Yan Wang, Jianliang Cao, Cong Qin, Bo Zhang, Guang Sun, Zhanying Zhang
Flower-like SnO₂/g-C₃N₄ nanocomposites were synthesized via a facile hydrothermal method by using SnCl₄·5H₂O and urea as the precursor. The structure and morphology of the as-synthesized samples were characterized by using the X-ray powder diffraction (XRD), electron microscopy (FESEM and TEM), and Fourier transform infrared spectrometer (FT-IR) techniques. SnO₂ displays the unique 3D flower-like microstructure assembled with many uniform nanorods with the lengths and diameters of about 400-600 nm and 50-100 nm, respectively...
September 22, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28937645/bioelectrochemical-detection-of-mycobacterium-tuberculosis-esat-6-in-an-antibody-based-biomicrosystem
#10
Danna Sepulveda, Miguel A Aroca, Andres Varela, Patricia Del Portillo, Johann F Osma
Bioelectrochemical sensing of Mycobacterium tuberculosis through electro-immunosensors is a promising technique to detect relevant analytes. In general, immunosensors require the formation of organic assemblies by the adsorption of molecular constituents. Moreover, they depend on the correct immobilization of the bio-recognition element in the biosensor. These procedures cannot be easily monitored without the use of invasive methods. In this work, an impedance analysis technique was used, as a non-invasive method, to measure and differentiate the manufacturing stages of the sensors...
September 22, 2017: Sensors
https://www.readbyqxmd.com/read/28937644/american-sign-language-alphabet-recognition-using-a-neuromorphic-sensor-and-an-artificial-neural-network
#11
Miguel Rivera-Acosta, Susana Ortega-Cisneros, Jorge Rivera, Federico Sandoval-Ibarra
This paper reports the design and analysis of an American Sign Language (ASL) alphabet translation system implemented in hardware using a Field-Programmable Gate Array. The system process consists of three stages, the first being the communication with the neuromorphic camera (also called Dynamic Vision Sensor, DVS) sensor using the Universal Serial Bus protocol. The feature extraction of the events generated by the DVS is the second part of the process, consisting of a presentation of the digital image processing algorithms developed in software, which aim to reduce redundant information and prepare the data for the third stage...
September 22, 2017: Sensors
https://www.readbyqxmd.com/read/28937632/design-and-analysis-of-a-low-latency-deterministic-network-mac-for-wireless-sensor-networks
#12
Prasan Kumar Sahoo, Sudhir Ranjan Pattanaik, Shih-Lin Wu
The IEEE 802.15.4e standard has four different superframe structures for different applications. Use of a low latency deterministic network (LLDN) superframe for the wireless sensor network is one of them, which can operate in a star topology. In this paper, a new channel access mechanism for IEEE 802.15.4e-based LLDN shared slots is proposed, and analytical models are designed based on this channel access mechanism. A prediction model is designed to estimate the possible number of retransmission slots based on the number of failed transmissions...
September 22, 2017: Sensors
https://www.readbyqxmd.com/read/28937629/tracking-of-maneuvering-complex-extended-object-with-coupled-motion-kinematics-and-extension-dynamics-using-range-extent-measurements
#13
Lifan Sun, Baofeng Ji, Jian Lan, Zishu He, Jiexin Pu
The key to successful maneuvering complex extended object tracking (MCEOT) using range extent measurements provided by high resolution sensors lies in accurate and effective modeling of both the extension dynamics and the centroid kinematics. During object maneuvers, the extension dynamics of an object with a complex shape is highly coupled with the centroid kinematics. However, this difficult but important problem is rarely considered and solved explicitly. In view of this, this paper proposes a general approach to modeling a maneuvering complex extended object based on Minkowski sum, so that the coupled turn maneuvers in both the centroid states and extensions can be described accurately...
September 22, 2017: Sensors
https://www.readbyqxmd.com/read/28937603/proteome-stability-as-a-key-factor-of-genome-integrity
#14
REVIEW
Sentiljana Gumeni, Zoi Evangelakou, Vassilis G Gorgoulis, Ioannis P Trougakos
DNA damage is constantly produced by both endogenous and exogenous factors; DNA lesions then trigger the so-called DNA damaged response (DDR). This is a highly synchronized pathway that involves recognition, signaling and repair of the damage. Failure to eliminate DNA lesions is associated with genome instability, a driving force in tumorigenesis. Proteins carry out the vast majority of cellular functions and thus proteome quality control (PQC) is critical for the maintenance of cellular functionality. PQC is assured by the proteostasis network (PN), which under conditions of proteome instability address the triage decision of protein fold, hold, or degrade...
September 22, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28937593/a-new-proxy-measurement-algorithm-with-application-to-the-estimation-of-vertical-ground-reaction-forces-using-wearable-sensors
#15
Yuzhu Guo, Fabio Storm, Yifan Zhao, Stephen A Billings, Aleksandar Pavic, Claudia Mazzà, Ling-Zhong Guo
Measurement of the ground reaction forces (GRF) during walking is typically limited to laboratory settings, and only short observations using wearable pressure insoles have been reported so far. In this study, a new proxy measurement method is proposed to estimate the vertical component of the GRF (vGRF) from wearable accelerometer signals. The accelerations are used as the proxy variable. An orthogonal forward regression algorithm (OFR) is employed to identify the dynamic relationships between the proxy variables and the measured vGRF using pressure-sensing insoles...
September 22, 2017: Sensors
https://www.readbyqxmd.com/read/28937588/robust-dehaze-algorithm-for-degraded-image-of-cmos-image-sensors
#16
Chen Qu, Du-Yan Bi, Ping Sui, Ai-Nong Chao, Yun-Fei Wang
The CMOS (Complementary Metal-Oxide-Semiconductor) is a new type of solid image sensor device widely used in object tracking, object recognition, intelligent navigation fields, and so on. However, images captured by outdoor CMOS sensor devices are usually affected by suspended atmospheric particles (such as haze), causing a reduction in image contrast, color distortion problems, and so on. In view of this, we propose a novel dehazing approach based on a local consistent Markov random field (MRF) framework. The neighboring clique in traditional MRF is extended to the non-neighboring clique, which is defined on local consistent blocks based on two clues, where both the atmospheric light and transmission map satisfy the character of local consistency...
September 22, 2017: Sensors
https://www.readbyqxmd.com/read/28937410/cerebral-oxygenation-of-premature-lambs-supported-by-an-artificial-placenta
#17
Ahmed M El-Sabbagh, Brian W Gray, Andrew W Shaffer, Benjamin S Bryner, Joseph T Church, Jennifer S McLeod, Sara Zakem, Elena M Perkins, Renée A Shellhaas, John D E Barks, Alvaro Rojas-Peña, Robert H Bartlett, George B Mychaliska
An artificial placenta (AP) using venovenous extracorporeal life support (VV-ECLS) could represent a paradigm shift in the treatment of extremely premature infants. However, AP support could potentially alter cerebral oxygen delivery. We assessed cerebral perfusion in fetal lambs on AP support using near-infrared spectroscopy (NIRS) and carotid arterial flow (CAF). Fourteen premature lambs at EGA 130 days (term = 145) underwent cannulation of the right jugular vein and umbilical vein with initiation of VV-ECLS...
September 20, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28937205/electrospun-p-type-nickel-oxide-semiconducting-nanowires-for-low-voltage-field-effect-transistors
#18
Ao Liu, You Meng, Huihui Zhu, Yong-Young Noh, Guoxia Liu, Fukai Shan
One-dimensional metal-oxide nanowires are regarded as important building blocks in nanoscale electronics due to their unique mechanical and electrical properties. In this work, p-type nickel oxide nanowires (NiO NWs) were fabricated by combining sol-gel and electrospinning processes. The polyvinylpyrrolidone (PVP) with 1,300,000 molecular weight was used as the polymer matrix to increase the viscosity of NiO precursor solution. The formation and properties of the as-spun NiO/PVP composite NWs before/after calcination treatment were investigated using various techniques...
September 22, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28936874/copper-nitrogen-doped-graphene-hybrid-as-an-electrochemical-sensing-platform-for-distinguishing-dna-bases
#19
Shu-Wen Sun, Hai-Ling Liu, Yue Zhou, Feng-Bin Wang, Xing-Hua Xia
An electrochemical sensor using ultralight and porous copper-nitrogen doped graphene (CuNRGO) nanocomposite as the electrocatalyst has been constructed to simultaneously determine DNA bases such as guanine (G) and cytosine (C), adenine (A) and thymine (T). The nanocomposite is synthesized by thermally annealing an ice templated structure of graphene oxide (GO) and Cu(phen)2. Due to the unique structure and the presence of Cu(2+)-N active sites, the CuNRGO exhibits outstanding electrocatalytic activity toward the oxidation of free DNA bases...
September 22, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28936869/ratiometric-fluorescence-sensor-for-the-microrna-determination-by-catalyzed-hairpin-assembly
#20
Yi Liu, Tian Shen, Jing Li, Hang Gong, Chunyan Chen, Xiaoming Chen, Changqun Cai
A novel catalyzed hairpin assembly-based turn-on ratiometric fluorescence biosensor was constructed for the determination of microRNA-122 (miRNA-122) by using 2-aminopurine (2-AP) and thioflavin T (ThT) as detection signal sources. Hairpin DNA sequence (H1) includes the complementary strands of miRNA-122 and G-quadruplex-forming sequence. When miRNA-122 was presented, hybridization occurred between miRNA-122 and part of H1, causing a double-stranded DNA and a G-quadruplex formed. The formed double-stranded DNA significantly decreased the fluorescence intensity of 2-AP...
September 22, 2017: ACS Sensors
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