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https://www.readbyqxmd.com/read/28449406/a-water-stable-dual-channel-luminescence-sensor-for-uo22-ion-based-on-an-anionic-terbium-iii-metal-organic-framework
#1
Junwei Ye, Raji Feyisa Bogale, Yangwei Shi, Yanzhen Chen, Xigang Liu, Yaoyao Yang, Siqi Zhang, Jianzhang Zhao, Guiling Ning
A stable 3D Tb(III)-based metal-organic framework [Tb(BPDC)2]*(CH3)2NH2 (DUT-101) was synthesized, and it is the first efficient dual-channel luminescence sensor for aqueous UO22+ ion. DUT-101 possesses an anionic three-dimensional framework and protonated dimethylamine molecules embedded within the channels. Intense green emission of DUT-101 could be highly selectively and sensitively quenched by UO22+ ions even in the coexistence of other competing metal ions. The possible sensing mechanism was proposed as well based on both suppression of luminescence resonance energy transfer and enhancement of intermolecular electronic transfer...
April 27, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28449380/the-pas-domains-of-the-major-sporulation-kinase-in-bacillus-subtilis-play-a-role-in-tetramer-formation-that-is-essential-for-the%C3%A2-autokinase-activity
#2
Brittany Kiehler, Lindsey Haggett, Masaya Fujita
Sporulation in Bacillus subtilis is induced upon starvation. In a widely accepted model, an N-terminal "sensor" domain of the major sporulation kinase KinA recognizes a hypothetical starvation signal(s) and autophosphorylates a histidine residue to activate the master regulator Spo0A via a multicomponent phosphorelay. However, to date no confirmed signal has been found. Here, we demonstrated that PAS-A, the most N-terminal of the three PAS domains (PAS-ABC), is dispensable for the activity, contrary to a previous report...
April 27, 2017: MicrobiologyOpen
https://www.readbyqxmd.com/read/28449056/plant-hexokinases-are-multifaceted-proteins
#3
Giovanna P Aguilera-Alvarado, Sobeida Sánchez-Nieto
Sugars are the main carbon and energy source in cells, but they can also act as signaling molecules that affect the whole plant life cycle. Certain tissues can produce sugars and supply them to others, and this plant tissue heterogeneity makes sugar signaling a highly complex process that requires elements capable of perceiving changes in sugar concentrations among different tissues, cell compartments and developmental stages. In plants, the regulatory effects of Glucose (Glc) have been the most studied to date...
April 25, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28448961/supported-binary-liposome-vesicle-gold-nanoparticle-for-enhanced-label-free-dna-and-protein-sensing
#4
Divya Karutha Pandian, Venkataraman Dharuman
Supported binary liposome mixture of cationic liposome N-[1-(2,3-Dioleoyloxy)propyl]-N,N,N-trimethylammonium propane (DOTAP) and the zwitterionic liposome 1,2-Dioleoyl-sn-Glycero-3-Phosphoethanolamine (DOPE) were tethered on thiol monolayers in the absence and presence of gold nanoparticle to enhance sensor stability and sensitivity for label free DNA and protein sensing for the first time. Cysteamine hydrochloride (Cyst), 3-Mercaptopropionic acid (MPA), 11-Mercaptoundecanoic acid (MUDA) and 11-amino-1-undecane thiol (AUT) monolayers were used as tethers on gold surfaces...
April 20, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28448943/mitochondria-in-endothelial-cells-sensors-and-integrators-of-environmental-cues
#5
REVIEW
Sergio Caja, Jose Antonio Enríquez
The involvement of angiogenesis in disease and its potential as a therapeutic target have been firmly established over recent decades. Endothelial cells (ECs) are central elements in vessel homeostasis and regulate the passage of material and cells into and out of the bloodstream. EC proliferation and migration are modified by alterations to mitochondrial biogenesis and dynamics resulting from several signals and environmental cues, such as oxygen, hemodynamics, and nutrients. As intermediary signals, mitochondrial ROS are released as important downstream modulators of the expression of angiogenesis-related genes...
April 18, 2017: Redox Biology
https://www.readbyqxmd.com/read/28448855/glassy-carbon-electrode-modified-with-7-7-8-8-tetracyanoquinodimethane-and-graphene-oxide-triggered-a-synergistic-effect-low-potential-amperometric-detection-of-reduced-glutathione
#6
Baiqing Yuan, Chunying Xu, Renchun Zhang, Donghui Lv, Sujuan Li, Daojun Zhang, Lin Liu, Carlos Fernandez
A sensitive electrochemical sensor based on the synergistic effect of 7,7,8,8-tetracyanoquinodimethane (TCNQ) and graphene oxide (GO) for low-potential amperometric detection of reduced glutathione (GSH) in pH 7.2 phosphate buffer solution (PBS) has been reported. This is the first time that the combination of GO and TCNQ have been successfully employed to construct an electrochemical sensor for the detection of glutathione. The surface of the glassy carbon electrode (GCE) was modified by a drop casting using TCNQ and GO...
April 21, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28448509/better-than-counting-seconds-identifying-fallers-among-healthy-elderly-using-fusion-of-accelerometer-features-and-dual-task-timed-up-and-go
#7
Moacir Ponti, Patricia Bet, Caroline L Oliveira, Paula C Castro
Devices and sensors for identification of fallers can be used to implement actions to prevent falls and to allow the elderly to live an independent life while reducing the long-term care costs. In this study we aimed to investigate the accuracy of Timed Up and Go test, for fallers' identification, using fusion of features extracted from accelerometer data. Single and dual tasks TUG (manual and cognitive) were performed by a final sample (94% power) of 36 community dwelling healthy older persons (18 fallers paired with 18 non-fallers) while they wear a single triaxial accelerometer at waist with sampling rate of 200Hz...
2017: PloS One
https://www.readbyqxmd.com/read/28448469/distributed-data-service-for-data-management-in-internet-of-things-middleware
#8
Ruben Cruz Huacarpuma, Rafael Timoteo de Sousa Junior, Maristela Terto de Holanda, Robson de Oliveira Albuquerque, Luis Javier García Villalba, Tai-Hoon Kim
The development of the Internet of Things (IoT) is closely related to a considerable increase in the number and variety of devices connected to the Internet. Sensors have become a regular component of our environment, as well as smart phones and other devices that continuously collect data about our lives even without our intervention. With such connected devices, a broad range of applications has been developed and deployed, including those dealing with massive volumes of data. In this paper, we introduce a Distributed Data Service (DDS) to collect and process data for IoT environments...
April 27, 2017: Sensors
https://www.readbyqxmd.com/read/28448464/bayesian-device-free-localization-and-tracking-in-a-binary-rf-sensor-network
#9
Zhenghuan Wang, Heng Liu, Shengxin Xu, Xiangyuan Bu, Jianping An
Received-signal-strength-based (RSS-based) device-free localization (DFL) is a promising technique since it is able to localize the person without attaching any electronic device. This technology requires measuring the RSS of all links in the network constituted by several radio frequency (RF) sensors. It is an energy-intensive task, especially when the RF sensors work in traditional work mode, in which the sensors directly send raw RSS measurements of all links to a base station (BS). The traditional work mode is unfavorable for the power constrained RF sensors because the amount of data delivery increases dramatically as the number of sensors grows...
April 27, 2017: Sensors
https://www.readbyqxmd.com/read/28448452/a-wireless-sensor-network-for-growth-environment-measurement-and-multi-band-optical-sensing-to-diagnose-tree-vigor
#10
Shinichi Kameoka, Shuhei Isoda, Atsushi Hashimoto, Ryoei Ito, Satoru Miyamoto, Genki Wada, Naoki Watanabe, Takashi Yamakami, Ken Suzuki, Takaharu Kameoka
We have tried to develop the guidance system for farmers to cultivate using various phenological indices. As the sensing part of this system, we deployed a new Wireless Sensor Network (WSN). This system uses the 920 MHz radio wave based on the Wireless Smart Utility Network that enables long-range wireless communication. In addition, the data acquired by the WSN were standardized for the advanced web service interoperability. By using these standardized data, we can create a web service that offers various kinds of phenological indices as secondary information to the farmers in the field...
April 27, 2017: Sensors
https://www.readbyqxmd.com/read/28448449/an-artificial-measurements-based-adaptive-filter-for-energy-efficient-target-tracking-via-underwater-wireless-sensor-networks
#11
Huayan Chen, Senlin Zhang, Meiqin Liu, Qunfei Zhang
We study the problem of energy-efficient target tracking in underwater wireless sensor networks (UWSNs). Since sensors of UWSNs are battery-powered, it is impracticable to replace the batteries when exhausted. This means that the battery life affects the lifetime of the whole network. In order to extend the network lifetime, it is worth reducing the energy consumption on the premise of sufficient tracking accuracy. This paper proposes an energy-efficient filter that implements the tradeoff between communication cost and tracking accuracy...
April 27, 2017: Sensors
https://www.readbyqxmd.com/read/28448445/horizontal-directional-drilling-length-detection-technology-while-drilling-based-on-bi-electro-magnetic-sensing
#12
Yudan Wang, Guojun Wen, Han Chen
The drilling length is an important parameter in the process of horizontal directional drilling (HDD) exploration and recovery, but there has been a lack of accurate, automatically obtained statistics regarding this parameter. Herein, a technique for real-time HDD length detection and a management system based on the electromagnetic detection method with a microprocessor and two magnetoresistive sensors employing the software LabVIEW are proposed. The basic principle is to detect the change in the magnetic-field strength near a current coil while the drill stem and drill-stem joint successively pass through the current coil forward or backward...
April 27, 2017: Sensors
https://www.readbyqxmd.com/read/28448431/a-type-2-block-component-decomposition-based-2d-aoa-estimation-algorithm-for-an-electromagnetic-vector-sensor-array
#13
Yu-Fei Gao, Guan Gui, Wei Xie, Yan-Bin Zou, Yue Yang, Qun Wan
This paper investigates a two-dimensional angle of arrival (2D AOA) estimation algorithm for the electromagnetic vector sensor (EMVS) array based on Type-2 block component decomposition (BCD) tensor modeling. Such a tensor decomposition method can take full advantage of the multidimensional structural information of electromagnetic signals to accomplish blind estimation for array parameters with higher resolution. However, existing tensor decomposition methods encounter many restrictions in applications of the EMVS array, such as the strict requirement for uniqueness conditions of decomposition, the inability to handle partially-polarized signals, etc...
April 27, 2017: Sensors
https://www.readbyqxmd.com/read/28448074/simultaneous-electrical-recording-of-cardiac-electrophysiology-and-contraction-on-chip
#14
Fang Qian, Chao Huang, Yi-Dong Lin, Anna N Ivanovskaya, Thomas J O'Hara, Ross H Booth, Cameron J Creek, Heather A Enright, David A Soscia, Anna M Belle, Ronglih Liao, Felice C Lightstone, Kristen S Kulp, Elizabeth K Wheeler
Prevailing commercialized cardiac platforms for in vitro drug development utilize planar microelectrode arrays to map action potentials, or impedance sensing to record contraction in real time, but cannot record both functions on the same chip with high spatial resolution. Here we report a novel cardiac platform that can record cardiac tissue adhesion, electrophysiology, and contractility on the same chip. The platform integrates two independent yet interpenetrating sensor arrays: a microelectrode array for field potential readouts and an interdigitated electrode array for impedance readouts...
April 27, 2017: Lab on a Chip
https://www.readbyqxmd.com/read/28448040/determination-of-high-affinity-antibody-antigen-binding-kinetics-using-four-biosensor-platforms
#15
Danlin Yang, Ajit Singh, Helen Wu, Rachel Kroe-Barrett
Label-free optical biosensors are powerful tools in drug discovery for the characterization of biomolecular interactions. In this study, we describe the use of four routinely used biosensor platforms in our laboratory to evaluate the binding affinity and kinetics of ten high-affinity monoclonal antibodies (mAbs) against human proprotein convertase subtilisin kexin type 9 (PCSK9). While both Biacore T100 and ProteOn XPR36 are derived from the well-established Surface Plasmon Resonance (SPR) technology, the former has four flow cells connected by serial flow configuration, whereas the latter presents 36 reaction spots in parallel through an improvised 6 x 6 crisscross microfluidic channel configuration...
April 17, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28448008/a-protocol-for-using-f%C3%A3-rster-resonance-energy-transfer-fret-force-biosensors-to-measure-mechanical-forces-across-the-nuclear-linc-complex
#16
Paul T Arsenovic, Kranthidhar Bathula, Daniel E Conway
The LINC complex has been hypothesized to be the critical structure that mediates the transfer of mechanical forces from the cytoskeleton to the nucleus. Nesprin-2G is a key component of the LINC complex that connects the actin cytoskeleton to membrane proteins (SUN domain proteins) in the perinuclear space. These membrane proteins connect to lamins inside the nucleus. Recently, a Förster Resonance Energy Transfer (FRET)-force probe was cloned into mini-Nesprin-2G (Nesprin-TS (tension sensor)) and used to measure tension across Nesprin-2G in live NIH3T3 fibroblasts...
April 11, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28447935/host-selected-mutations-converging-on-a-global-regulator-drive-an-adaptive-leap-by-bacteria-to-symbiosis
#17
Molly Sabrina Pankey, Randi L Foxall, Ian M Ster, Lauren A Perry, Brian M Schuster, Rachel A Donner, Matthew Coyle, Vaughn S Cooper, Cheryl A Whistler
Host immune and physical barriers protect against pathogens but also impede the establishment of essential symbiotic partnerships. To reveal mechanisms by which beneficial organisms adapt to circumvent host defenses, we experimentally evolved ecologically distinct bioluminescent Vibrio fischeri through Euprymna scolopes squid light organs. Serial squid passaging of bacteria produced eight distinct mutations in the binK sensor kinase gene that conferred an exceptional selective advantage demonstrated through both empirical and theoretical analysis...
April 27, 2017: ELife
https://www.readbyqxmd.com/read/28447865/a-versatile-stretch-sensor-for-measuring-physiological-movement-using-a-centre-loaded-end-supported-load-cell
#18
Syrpailyne Wankhar, Albert A Kota, Dheepak Selvaraj
Acquisition of movement of some body parts can provide important physiological information. In clinical practice as well as for research purposes different types of sensors such as piezoelectric crystals, conductive rubber and optical displacement sensors are used for such measurements. Each of these sensors is associated with its problems. This paper discusses the use of a stretch sensor constructed using a small metal bar, approximately the size of a zipper slider that can be sewn into a fabric in the form of a belt...
April 27, 2017: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/28447604/wearable-smart-sensor-systems-integrated-on-soft-contact-lenses-for-wireless-ocular-diagnostics
#19
Joohee Kim, Minji Kim, Mi-Sun Lee, Kukjoo Kim, Sangyoon Ji, Yun-Tae Kim, Jihun Park, Kyungmin Na, Kwi-Hyun Bae, Hong Kyun Kim, Franklin Bien, Chang Young Lee, Jang-Ung Park
Wearable contact lenses which can monitor physiological parameters have attracted substantial interests due to the capability of direct detection of biomarkers contained in body fluids. However, previously reported contact lens sensors can only monitor a single analyte at a time. Furthermore, such ocular contact lenses generally obstruct the field of vision of the subject. Here, we developed a multifunctional contact lens sensor that alleviates some of these limitations since it was developed on an actual ocular contact lens...
April 27, 2017: Nature Communications
https://www.readbyqxmd.com/read/28447541/sensor-array-for-detection-of-organic-and-inorganic-contaminants-in-post-consumer-recycled-plastics-for-food-contact
#20
Nathan Davis, Jeffery Danes, Keith Vorst
Post-consumer recycled (PCR) plastic material is made by collecting used plastic products (e.g., bottles and other plastic packaging materials) and re-processing them into solid-state pellets or flakes. Plastic recycling has positive environmental benefits, but may also carry potential drawbacks due to unwanted organic and inorganic contaminants. These contaminants can migrate into food packaging made from these recycled plastic materials. The purpose of this research was to identify economically viable real-time monitoring technologies that can be used during conversion of virgin and recycled resin feedstocks (i...
April 27, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
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