keyword
MENU ▼
Read by QxMD icon Read
search

Local field potentials

keyword
https://www.readbyqxmd.com/read/28437625/imaging-guided-synergetic-therapy-of-orthotopic-transplantation-tumor-by-superselectively-arterial-administration-of-microwave-induced-microcapsules
#1
Shunsong Tang, Changhui Fu, Longfei Tan, Tianlong Liu, Jingsong Mao, Xiangling Ren, Hongying Su, Dan Long, Qianqian Chai, Zhongbing Huang, Xudong Chen, Jingzhuo Wang, Jun Ren, Xianwei Meng
It is an ambitious target to improve overall Hepatocellular Carcinoma therapeutic effects. Recently, MW ablation has emerged as a powerful thermal ablation technique, affording favorable survival with excellent local tumor control. To achieve better therapeutic effects of MW ablation, MW sensitizers are prepared for enhanced MW ablation to preferentially heat tumor territory. However, it is still not practicable for treatment of the orthotopic transplantation tumor. Herein, biocompatible and degradable methoxy poly(ethylene glycol)-poly(lactic-co-glycolic acid) (mPEG-PLGA) microcapsules with hierarchical structure have been designed for microwave-induced tumor therapy...
April 14, 2017: Biomaterials
https://www.readbyqxmd.com/read/28437449/insecticide-resistance-status-of-malaria-vectors-in-lao-pdr
#2
Sébastien Marcombe, Julie Bobichon, Boutsady Somphong, Nothasin Phommavan, Santi Maithaviphet, Simone Nambanya, Vincent Corbel, Paul T Brey
Knowledge on insecticide resistance in Anopheles species is a basic requirement to guide malaria vector control programs. In Lao PDR, vector control relies on insecticide residual spraying (IRS) and impregnated bed-nets (ITNs) with the use of pyrethroids. Here, the susceptibility of Anopheles species, including several malaria vectors (An. maculatus and An. minimus), to various insecticides was investigated in ten provinces of Lao PDR through a north-south transect. Bioassays were performed on field caught female mosquitoes using the standard WHO susceptibility tests with DDT (4%), deltamethrin (0...
2017: PloS One
https://www.readbyqxmd.com/read/28437086/the-skyrmion-switch-turning-magnetic-skyrmion-bubbles-on-and-off-with-an-electric-field
#3
Marine Schott, Anne Bernand-Mantel, Laurent Ranno, Stéfania Pizzini, Jan Vogel, Hélène Béa, Claire Baraduc, Stéphane Auffret, Gilles Gaudin, Dominique Givord
Nanoscale magnetic skyrmions are considered as potential information carriers for future spintronics memory and logic devices. Such applications will require the control of their local creation and annihilation, which involves so far solutions that are either energy consuming or difficult to integrate. Here we demonstrate the control of skyrmion bubbles nucleation and annihilation using electric field gating, an easily integrable and potentially energetically efficient solution. We present a detailed stability diagram of the skyrmion bubbles in a Pt/Co/oxide trilayer and show that their stability can be controlled via an applied electric field...
April 24, 2017: Nano Letters
https://www.readbyqxmd.com/read/28436455/the-impact-of-gold-mining-and-agricultural-concessions-on-the-tree-cover-and-local-communities-in-northern-myanmar
#4
Sarah Papworth, Madhu Rao, Myint Myint Oo, Kyaw Thinn Latt, Robert Tizard, Thomas Pienkowski, L Roman Carrasco
Myanmar offers unique opportunities for both biodiversity conservation and foreign direct investment due to projected economic growth linked to natural resource exploitation. Industrial-scale development introduces new land uses into the landscape, with unknown repercussions for local communities and biodiversity conservation. We use participatory mapping of 31 communities, focus groups in 28 communities, and analyses of forest cover change during 2000-2010 using MODIS vegetation continuous fields images, to understand the social and environmental impacts of gold mining and agricultural concessions in Myanmar's Hukaung Valley (~21,800 km(2))...
April 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28435858/flexible-and-stretchable-nanowire-coated-fibers-for-optoelectronic-probing-of-spinal-cord-circuits
#5
Chi Lu, Seongjun Park, Thomas J Richner, Alexander Derry, Imogen Brown, Chong Hou, Siyuan Rao, Jeewoo Kang, Chet T Mortiz, Yoel Fink, Polina Anikeeva
Studies of neural pathways that contribute to loss and recovery of function following paralyzing spinal cord injury require devices for modulating and recording electrophysiological activity in specific neurons. These devices must be sufficiently flexible to match the low elastic modulus of neural tissue and to withstand repeated strains experienced by the spinal cord during normal movement. We report flexible, stretchable probes consisting of thermally drawn polymer fibers coated with micrometer-thick conductive meshes of silver nanowires...
March 2017: Science Advances
https://www.readbyqxmd.com/read/28435259/methotrexate-coupled-nanoparticles-and-magnetic-nanochemothermia-for-the-relapse-free-treatment-of-t24-bladder-tumors
#6
Marcus Stapf, Ulf Teichgräber, Ingrid Hilger
Heat-based approaches have been considered as promising tools due to their ability to directly eradicate tumor cells and/or increase the sensitivity of tumors to radiation- or chemotherapy. In particular, the heating of magnetic nanoparticles (MNPs) via an alternating magnetic field can provide a handy alternative for a localized tumor treatment. To amplify the efficacy of magnetically induced thermal treatments, we elucidated the superior tumor-destructive effect of methotrexate-coupled MNPs (MTX/MNPs) in combination with magnetic heating (nanochemothermia) over the thermal treatment alone...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28434423/current-implementation-of-health-technology-assessment-in-healthcare-system-in-slovenia
#7
Valentina Prevolnik Rupel
OBJECTIVES: The objective of this study was to analyze and present the current state of the implementation of health technology assessment (HTA) in Slovenia, identify its advantages and challenges, as well as potential improvements and developments. METHODS: The HTA structure and processes were analyzed and comprehensively described according to relevant literature, official documents, and experiences of the author. RESULTS: The important steps in the development and implementation of an HTA system are presented through eight key elements: capacity building; HTA funding; HTA legislation and organizational structure; the scope of HTA implementation; decision criteria; quality, timelines, and transparency of HTA implementation; use of local data; and international collaboration...
April 24, 2017: International Journal of Technology Assessment in Health Care
https://www.readbyqxmd.com/read/28434154/protective-effects-of-cell-free-supernatant-and-live-lactic-acid-bacteria-isolated-from-thai-pigs-against-a-pandemic-strain-of-porcine-epidemic-diarrhea-virus
#8
Wandee Sirichokchatchawan, Gun Temeeyasen, Dachrit Nilubol, Nuvee Prapasarakul
Porcine epidemic diarrhea virus (PEDV) is a coronavirus which causes severe diarrhea and fatal dehydration in piglets. In general, probiotic supplements could enhance recovery and protect piglets against enteric pathogens. Seven local lactic acid bacteria (LAB), (Ent. faecium 79N and 40N, Lact. plantarum 22F, 25F and 31F, Ped. acidilactici 72N and Ped. pentosaceus 77F) from pig feces were well-characterized as high potential probiotics. Cell-free supernatants (CFS) and live LAB were evaluated for antiviral activities by co-incubation on Vero cells and challenged with a pandemic strain of PEDV isolated from pigs in Thailand...
April 22, 2017: Probiotics and Antimicrobial Proteins
https://www.readbyqxmd.com/read/28432143/focal-local-field-potential-lfp-signature-of-the-single-axon-monosynaptic-thalamocortical-connection
#9
Espen Hagen, Janne C Fossum, Klas H Pettersen, Jose-Manuel Alonso, Harvey A Swadlow, Gaute T Einevolla
Recent years have seen a resurgence in use of the extracellularly recorded local field potential (LFP) to investigate neural network activity. To probe monosynaptic thalamic activation of cortical postsynaptic target cells, so called spike-trigger-averaged LFP (stLFP) signatures have been measured. In these experiments the cortical LFP is measured by means of multielectrodes covering several cortical lamina and averaged on spontaneous spikes of thalamocortical (TC) cells. Using a well-established forward-modeling scheme, we investigate the biophysical origin of this stLFP signature with simultaneous synaptic activation of cortical layer 4 neurons, mimicking the effect of a single afferent spike from a single TC neuron...
April 21, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28431428/computational-and-in-vitro-experimental-investigation-of-intrathecal-drug-distribution-parametric-study-of-the-effect-of-injection-volume-cerebrospinal-fluid-pulsatility-and-drug-uptake
#10
Kevin M Tangen, Roxanne Leval, Ankit I Mehta, Andreas A Linninger
BACKGROUND: Intrathecal drug delivery is an attractive option to circumvent the blood-brain barrier for pain management through its increased efficacy of pain relief, reduction in adverse side effects, and cost-effectiveness. Unfortunately, there are limited guidelines for physicians to choose infusion or drug pump settings to administer therapeutic doses to specific regions of the spine or the brain. Although empiric trialing of intrathecal drugs is critical to determine the sustained side effects, currently there is no inexpensive in vitro method to guide the selection of spinal drug delivery parameters...
May 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28431164/low-activity-microstates-during-sleep
#11
Hiroyuki Miyawaki, Yazan N Billeh, Kamran Diba
Study Objectives: To better understand the distinct activity patterns of the brain during sleep, we observed and investigated periods of diminished oscillatory and population spiking activity lasting for seconds during non-REM sleep, which we call "LOW" activity sleep. Methods: We analyzed spiking and local field potential (LFP) activity of hippocampal CA1 region alongside neocortical electroencephalogram (EEG) and electromyogram (EMG) in 19 sessions from four male Long-Evans rats (262-363g) during natural wake/sleep across the 24-hr cycle, as well as data from other brain regions obtained from http://crcns...
April 18, 2017: Sleep
https://www.readbyqxmd.com/read/28428742/a-set-based-mixed-effect-model-for-gene-environment-interaction-and-its-application-to-neuroimaging-phenotypes
#12
Changqing Wang, Jianping Sun, Bryan Guillaume, Tian Ge, Derrek P Hibar, Celia M T Greenwood, Anqi Qiu
Imaging genetics is an emerging field for the investigation of neuro-mechanisms linked to genetic variation. Although imaging genetics has recently shown great promise in understanding biological mechanisms for brain development and psychiatric disorders, studying the link between genetic variants and neuroimaging phenotypes remains statistically challenging due to the high-dimensionality of both genetic and neuroimaging data. This becomes even more challenging when studying gene-environment interaction (G×E) on neuroimaging phenotypes...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28427319/mechanobiological-modelling-of-tendons-review-and-future-opportunities
#13
Mark S Thompson, M Nazri Bajuri, Hanifeh Khayyeri, Hanna Isaksson
Tendons are adapted to carry large, repeated loads and are clinically important for the maintenance of musculoskeletal health in an increasing, actively ageing population, as well as in elite athletes. Tendons are known to adapt to mechanical loading. Also, their healing and disease processes are highly sensitive to mechanical load. Computational modelling approaches developed to capture this mechanobiological adaptation in tendons and other tissues have successfully addressed many important scientific and clinical issues...
May 2017: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/28426128/hippocampal-electrical-stimulation-disrupts-associative-learning-when-targeted-at-dentate-spikes
#14
Miriam S Nokia, Irina Gureviciene, Tomi Waselius, Heikki Tanila, Markku Penttonen
Hippocampal electrophysiological oscillations, namely theta and ripples, have been implicated in encoding and consolidation of new memories, respectively. According to existing literature, hippocampal dentate spikes are prominent, short-duration (<30 ms), large-amplitude (∼2-4 mV) fluctuations in hilar local-field potentials that take place during awake immobility and sleep. Interestingly, previous studies indicate that during dentate spikes dentate gyrus granule cells increase their firing while firing of CA1 pyramidal cells are suppressed, thus resulting in momentary uncoupling of the two hippocampal subregions...
April 20, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28423425/temporal-resource-partitioning-and-interspecific-correlations-in-a-warm-temperate-climate-assemblage-of-dung-beetles-coleoptera-scarabaeidae
#15
Gregory T Sullivan, Sebahat K Ozman-Sullivan, Anne Bourne, Jean-Pierre Lumaret, Unal Zeybekoglu, Myron P Zalucki, Greg Baxter
Guilds of dung dwelling and tunneling dung beetles coexist in local assemblages in warm temperate regions, despite the tendency of dwellers to be inferior competitors. A field experiment on the Black Sea coast of Turkey examined the role of temporal resource partitioning in their coexistence. Standardized dung pads deposited at 4 h intervals through a 24 h period in summer were collected 12, 24, or 48 h later. Adults from 10 tunneling and seven dung dwelling species were collected. The tunnelers contributed a high proportion of both total abundance and biomass...
January 1, 2017: Journal of Insect Science
https://www.readbyqxmd.com/read/28422663/a-neural-probe-with-up-to-966-electrodes-and-up-to-384-configurable-channels-in-0-13-%C3%AE-m-soi-cmos
#16
Carolina Mora Lopez, Jan Putzeys, Bogdan Cristian Raducanu, Marco Ballini, Shiwei Wang, Alexandru Andrei, Veronique Rochus, Roeland Vandebriel, Simone Severi, Chris Van Hoof, Silke Musa, Nick Van Helleputte, Refet Firat Yazicioglu, Srinjoy Mitra
In vivo recording of neural action-potential and local-field-potential signals requires the use of high-resolution penetrating probes. Several international initiatives to better understand the brain are driving technology efforts towards maximizing the number of recording sites while minimizing the neural probe dimensions. We designed and fabricated (0.13- μm SOI Al CMOS) a 384-channel configurable neural probe for large-scale in vivo recording of neural signals. Up to 966 selectable active electrodes were integrated along an implantable shank (70 μm wide, 10 mm long, 20  μm thick), achieving a crosstalk of [Formula: see text] dB...
April 14, 2017: IEEE Transactions on Biomedical Circuits and Systems
https://www.readbyqxmd.com/read/28422233/detection-of-stiff-nanoparticles-within-cellular-structures-by-contact-resonance-atomic-force-microscopy-subsurface-nanomechanical-imaging
#17
Melania Reggente, Daniele Passeri, Livia Angeloni, Francesca Anna Scaramuzzo, Mario Barteri, Francesca De Angelis, Irene Persiconi, Maria Egle De Stefano, Marco Rossi
Detecting stiff nanoparticles buried in soft biological matrices by atomic force microscopy (AFM) based techniques represents a new frontier in the field of scanning probe microscopies, originally developed as surface characterization methods. Here we report the detection of stiff (magnetic) nanoparticles (NPs) internalized in cells by using contact resonance AFM (CR-AFM) employed as a potentially non-destructive subsurface characterization tool. Magnetite (Fe3O4) NPs were internalized in microglial cells from cerebral cortices of mouse embryos of 18 days by phagocytosis...
April 19, 2017: Nanoscale
https://www.readbyqxmd.com/read/28421552/gap-junction-modulation-of-low-frequency-oscillations-in-the-cerebellar-granule-cell-layer
#18
Jennifer Claire Robinson, C Andrew Chapman, Richard Courtemanche
Local field potential (LFP) oscillations in the granule cell layer (GCL) of the cerebellar cortex have been identified previously in the awake rat and monkey during immobility. These low-frequency oscillations are thought to be generated through local circuit interactions between Golgi cells and granule cells within the GCL. Golgi cells display rhythmic firing and pacemaking properties, and also are electrically coupled through gap junctions within the GCL. Here, we tested if gap junctions in the rat cerebellar cortex contribute to the generation of LFP oscillations in the GCL...
April 18, 2017: Cerebellum
https://www.readbyqxmd.com/read/28420410/ethnopharmacologic-survey-of-medicinal-plants-used-to-treat-human-diseases-by-traditional-medical-practitioners-in-dega-damot-district-amhara-northwestern-ethiopia
#19
Muluken Wubetu, Tefera Abula, Getye Dejenu
BACKGROUND: One of the services that plants provide for human beings is their wider medicinal application. Although it is not fully assessed, the practice and wider use of traditional medicine is frequent in Ethiopia. Studies conducted previously are confined to the perceptions of modern and traditional health practitioners about traditional medicine. A total of 45 informants were selected purposefully from the study area. For collecting the data, semi-structured interviewees, observation and field walks were employed from August 10 to September 30/2014...
April 18, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28419056/response-characteristics-of-the-rat-anterior-cingulate-cortex-to-ultrasonic-communicative-vocalizations
#20
Yumi Saito, Kazuo Okanoya
Emotional communication involves transmitting information on affective states. Rat 50- and 22-kHz ultrasonic vocalizations (USVs) are emotional communication signals that reflect positive or negative states, respectively. In general, emotional communication signals that elicit changes in event-related potentials (ERPs), suggesting a specific mechanism for processing these signals. As this is observed in several communication systems including humans, we hypothesized that rat USVs can also trigger such changes...
April 17, 2017: Neuroreport
keyword
keyword
22032
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"