keyword
MENU ▼
Read by QxMD icon Read
search

get here

keyword
https://www.readbyqxmd.com/read/27926381/a-review-on-brain-structures-segmentation-in-magnetic-resonance-imaging
#1
REVIEW
Sandra González-Villà, Arnau Oliver, Sergi Valverde, Liping Wang, Reyer Zwiggelaar, Xavier Lladó
BACKGROUND AND OBJECTIVES: Automatic brain structures segmentation in magnetic resonance images has been widely investigated in recent years with the goal of helping diagnosis and patient follow-up in different brain diseases. Here, we present a review of the state-of-the-art of automatic methods available in the literature ranging from structure specific segmentation methods to whole brain parcellation approaches. METHODS: We divide first the algorithms according to their target structures and then we propose a general classification based on their segmentation strategy, which includes atlas-based, learning-based, deformable, region-based and hybrid methods...
October 2016: Artificial Intelligence in Medicine
https://www.readbyqxmd.com/read/27925580/multiple-selection-filters-ensure-accurate-tail-anchored-membrane-protein-targeting
#2
Meera Rao, Voytek Okreglak, Un Seng Chio, Hyunju Cho, Peter Walter, Shu-Ou Shan
Accurate protein localization is crucial to generate and maintain organization in all cells. Achieving accuracy is challenging, as the molecular signals that dictate a protein's cellular destination are often promiscuous. A salient example is the targeting of an essential class of tail-anchored (TA) proteins, whose sole defining feature is a transmembrane domain near their C-terminus. Here we show that the Guided Entry of Tail-anchored protein (GET) pathway selects TA proteins destined to the endoplasmic reticulum (ER) utilizing distinct molecular steps, including differential binding by the co-chaperone Sgt2 and kinetic proofreading after ATP hydrolysis by the targeting factor Get3...
December 7, 2016: ELife
https://www.readbyqxmd.com/read/27911751/the-lateral-habenula-circuitry-reward-processing-and-cognitive-control
#3
Phillip M Baker, Thomas Jhou, Bo Li, Masayuki Matsumoto, Sheri J Y Mizumori, Marcus Stephenson-Jones, Aleksandra Vicentic
There has been a growing interest in understanding the role of the lateral habenula (LHb) in reward processing, affect regulation, and goal-directed behaviors. The LHb gets major inputs from the habenula-projecting globus pallidus and the mPFC, sending its efferents to the dopaminergic VTA and SNc, serotonergic dorsal raphe nuclei, and the GABAergic rostromedial tegmental nucleus. Recent studies have made advances in our understanding of the LHb circuit organization, yet the precise mechanisms of its involvement in complex behaviors are largely unknown...
November 9, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27910956/spin-crossover-materials-towards-microwave-radiation-switches
#4
Olesia I Kucheriv, Viktor V Oliynyk, Volodymyr V Zagorodnii, Vilen L Launets, Il'ya A Gural'skiy
Microwave electromagnetic radiation that ranges from one meter to one millimetre wavelengths is finding numerous applications for wireless communication, navigation and detection, which makes materials able to tune microwave radiation getting widespread interest. Here we offer a new way to tune GHz frequency radiation by using spin-crossover complexes that are known to change their various physical properties under the influence of diverse external stimuli. As a result of electronic re-configuration process, microwave absorption properties differ for high spin and low spin forms of the complex...
December 2, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27910633/2d-profile-of-poloidal-magnetic-field-diagnosed-by-a-laser-driven-ion-beam-trace-probe-litp
#5
Xiaoyi Yang, Chijie Xiao, Yihang Chen, Tianchao Xu, Chen Lin, Long Wang, Min Xu, Yi Yu
Based on large energy spread of laser-driven ion beam (LIB), a new method, the Laser-driven Ion-beam Trace Probe (LITP), was suggested recently to diagnose the poloidal magnetic field (Bp) and radial electric field (Er) in toroidal devices. Based on another property of LIB, a wide angular distribution, here we suggested that LITP could be extended to get 2D Bp profile or 1D profile of both poloidal and radial magnetic fields at the same time. In this paper, we show the basic principle, some preliminary simulation results, and experimental preparation to test the basic principle of LITP...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27909394/metabolic-energy-of-action-potentials-modulated-by-spike-frequency-adaptation
#6
Guo-Sheng Yi, Jiang Wang, Hui-Yan Li, Xi-Le Wei, Bin Deng
Spike frequency adaptation (SFA) exists in many types of neurons, which has been demonstrated to improve their abilities to process incoming information by synapses. The major carrier used by a neuron to convey synaptic signals is the sequences of action potentials (APs), which have to consume substantial metabolic energies to initiate and propagate. Here we use conductance-based models to investigate how SFA modulates the AP-related energy of neurons. The SFA is attributed to either calcium-activated K(+) (IAHP) or voltage-activated K(+) (IM) current...
2016: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/27902708/goal-fluency-pessimism-and-disengagement-in-depression
#7
Joanne M Dickson, Nicholas J Moberly, Christian O'Dea, Matt Field
Despite the development of prominent theoretical models of goal motivation and its importance in daily life, research has rarely examined goal dysregulation processes in clinical depression. Here we aimed to investigate problematic aspects of goal regulation in clinically depressed adults, relative to controls. Depressed participants (n = 42) were recruited from two Improving Access to Psychological Therapy clinics in north-west England. Control participants (n = 51) were recruited from the same region. Participants generated personal approach goals (e...
2016: PloS One
https://www.readbyqxmd.com/read/27902685/getting-to-the-bottom-of-face-processing-species-specific-inversion-effects-for-faces-and-behinds-in-humans-and-chimpanzees-pan-troglodytes
#8
Mariska E Kret, Masaki Tomonaga
For social species such as primates, the recognition of conspecifics is crucial for their survival. As demonstrated by the 'face inversion effect', humans are experts in recognizing faces and unlike objects, recognize their identity by processing it configurally. The human face, with its distinct features such as eye-whites, eyebrows, red lips and cheeks signals emotions, intentions, health and sexual attraction and, as we will show here, shares important features with the primate behind. Chimpanzee females show a swelling and reddening of the anogenital region around the time of ovulation...
2016: PloS One
https://www.readbyqxmd.com/read/27899566/asymmetric-positioning-of-cas1-2-complex-and-integration-host-factor-induced-dna-bending-guide-the-unidirectional-homing-of-protospacer-in-crispr-cas-type-i-e-system
#9
K N R Yoganand, R Sivathanu, Siddharth Nimkar, B Anand
CRISPR-Cas system epitomizes prokaryote-specific quintessential adaptive defense machinery that limits the genome invasion of mobile genetic elements. It confers adaptive immunity to bacteria by capturing a protospacer fragment from invading foreign DNA, which is later inserted into the leader proximal end of CRIPSR array and serves as immunological memory to recognize recurrent invasions. The universally conserved Cas1 and Cas2 form an integration complex that is known to mediate the protospacer invasion into the CRISPR array...
November 29, 2016: Nucleic Acids Research
https://www.readbyqxmd.com/read/27895414/hepatic-encephalopathy-ever-closer-to-its-big-bang
#10
EDITORIAL
Pablo A Souto, Ariel R Marcotegui, Lisandro Orbea, Juan Skerl, Juan Carlos Perazzo
Hepatic encephalopathy (HE) is a neuropsychiatric disorder that commonly complicates the course of patients with liver disease. Despite the fact that the syndrome was probably first recognized hundreds of years ago, the exact pathogenesis still remains unclear. Minimal hepatic encephalopathy (MHE) is the earliest form of HE and is estimated to affect more that 75% of patients with liver cirrhosis. It is characterized by cognitive impairment predominantly attention, reactiveness and integrative function with very subtle clinical manifestations...
November 14, 2016: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/27895152/spatio-temporal-uncoupling-of-mirna-mediated-translational-repression-and-target-rna-degradation-controls-mirnp-recycling-in-mammalian-cells
#11
Mainak Bose, Bahnisikha Barman, Avijit Goswami, Suvendra N Bhattacharyya
miRNA-mediated repression control expression of more than half of protein coding genes in metazoan animals. Translation repression is associated with target mRNA degradation initiated by decapping and deadenylation of the repressed mRNAs. Earlier evidence suggest Endoplasmic Reticulum (ER) as the site where miRNPs interact with their targets before the translation repression sets in but the subcellular location of subsequent degradation of miRNA-repressed messages is largely unidentified. Here, we explore the subcellular distribution of essential components of degradation machineries of miRNA-targeted mRNAs...
November 28, 2016: Molecular and Cellular Biology
https://www.readbyqxmd.com/read/27886453/you-can-t-get-there-from-here
#12
EDITORIAL
John Reilly
No abstract text is available yet for this article.
November 15, 2016: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/27865958/development-of-bone-like-zirconium-oxide-nanoceramic-modified-chitosan-based-porous-nanocomposites-for-biomedical-application
#13
Arundhati Bhowmick, Nilkamal Pramanik, Piyali Jana, Tapas Mitra, Arumugam Gnanamani, Manas Das, Patit Paban Kundu
Here, zirconium oxide nanoparticles (ZrO2 NPs) were incorporated for the first time in organic-inorganic hybrid composites containing chitosan, poly(ethylene glycol) and nano-hydroxypatite (CS-PEG-HA) to develop bone-like nanocomposites for bone tissue engineering application. These nanocomposites were characterized by FT-IR, XRD, TEM combined with SAED. SEM images and porosity measurements revealed highly porous structure having pore size of less than 1μm to 10μm. Enhanced water absorption capacity and mechanical strengths were obtained compared to previously reported CS-PEG-HA composite after addition of 0...
November 16, 2016: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/27856745/unreasonable-effectiveness-of-learning-neural-networks-from-accessible-states-and-robust-ensembles-to-basic-algorithmic-schemes
#14
Carlo Baldassi, Christian Borgs, Jennifer T Chayes, Alessandro Ingrosso, Carlo Lucibello, Luca Saglietti, Riccardo Zecchina
In artificial neural networks, learning from data is a computationally demanding task in which a large number of connection weights are iteratively tuned through stochastic-gradient-based heuristic processes over a cost function. It is not well understood how learning occurs in these systems, in particular how they avoid getting trapped in configurations with poor computational performance. Here, we study the difficult case of networks with discrete weights, where the optimization landscape is very rough even for simple architectures, and provide theoretical and numerical evidence of the existence of rare-but extremely dense and accessible-regions of configurations in the network weight space...
November 29, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27851806/5-hydroxymethylcytosine-precedes-loss-of-cpg-methylation-in-enhancers-and-genes-undergoing-activation-in-cardiomyocyte-maturation
#15
David K Kranzhöfer, Ralf Gilsbach, Björn A Grüning, Rolf Backofen, Thomas G Nührenberg, Lutz Hein
BACKGROUND: Cardiomyocytes undergo major changes in DNA methylation during maturation and transition to a non-proliferative state after birth. 5'-hydroxylation of methylated cytosines (5hmC) is not only involved in DNA loss of CpG methylation but is also thought to be an epigenetic mark with unique distribution and functions. Here, we sought to get insight into the dynamics of 5'-hydroxymethylcytosine in newborn and adult cardiomyocytes. METHODS: Cardiomyocyte nuclei from newborn and adult C57BL/6 mice were purified by flow cytometric sorting...
2016: PloS One
https://www.readbyqxmd.com/read/27837576/restless-legs-syndrome-mimicking-s1-radiculopathy
#16
Th Zambelis, B R Wolgamuth, S N Papoutsi, M-I Kontaxaki
Α case of a chronic idiopathic form of a severe type of Restless Legs Syndrome (RLS), which developed during pregnancy and persisted after this, misdiagnosed for 34 years as radiculopathy S1, is reported. In spite of the thorough clinical and laboratory investigation, in addition to constant changes of the therapeutic approach, the diagnosis of S1 radiculopathy could not be confirmed, resulting in a chronic clinical course; the latter was characterized by relapses and remissions not attributed or linked in any way to the treatment (various types of)...
July 2016: Psychiatrikē, Psychiatriki
https://www.readbyqxmd.com/read/27836698/biochemical-characterization-of-a-new-mitochondrial-transporter-of-dephosphocoenzyme-a-in-drosophila-melanogaster
#17
Angelo Vozza, Francesco De Leonardis, Eleonora Paradies, Anna De Grassi, Ciro Leonardo Pierri, Giovanni Parisi, Carlo Marya Thomas Marobbio, Francesco Massimo Lasorsa, Luigina Muto, Loredana Capobianco, Vincenza Dolce, Susanna Raho, Giuseppe Fiermonte
CoA is an essential cofactor that holds a central role in cell metabolism. Although its biosynthetic pathway is conserved across the three domains of life, the subcellular localization of the eukaryotic biosynthetic enzymes and the mechanism behind the cytosolic and mitochondrial CoA pools compartmentalization are still under debate. In humans, the transport of CoA across the inner mitochondrial membrane has been ascribed to two related genes, SLC25A16 and SLC25A42 whereas in D. melanogaster genome only one gene is present, CG4241, phylogenetically closer to SLC25A42...
November 9, 2016: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/27836553/how-much-alcohol-is-in-ketamine-s-antidepressant-action
#18
REVIEW
Udo Bonnet
Ketamine is approved to start and maintain anaesthesia or analgesia. Ketamine is also known to be neurotoxic and an old drug of abuse. Numerous studies have proven a rapid and strong antidepressant response (AR) following parenteral sub-anaesthetic ketamine doses when applied the first time to patients with treatment resistant unipolar or bipolar major depression. This rapid and robust AR is encouraging, though short-lived (usually up to seven days). There is growing evidence that repeated und escalating ketamine administrations exert longer-lasting AR than single infusions...
November 8, 2016: Life Sciences
https://www.readbyqxmd.com/read/27828106/nonuniform-fast-fourier-transform-method-for-numerical-diffraction-simulation-on-tilted-planes
#19
Yu Xiao, Xiahui Tang, Yingxiong Qin, Hao Peng, Wei Wang, Lijing Zhong
The method, based on the rotation of the angular spectrum in the frequency domain, is generally used for the diffraction simulation between the tilted planes. Due to the rotation of the angular spectrum, the interval between the sampling points in the Fourier domain is not even. For the conventional fast Fourier transform (FFT)-based methods, a spectrum interpolation is needed to get the approximate sampling value on the equidistant sampling points. However, due to the numerical error caused by the spectrum interpolation, the calculation accuracy degrades very quickly as the rotation angle increases...
October 1, 2016: Journal of the Optical Society of America. A, Optics, Image Science, and Vision
https://www.readbyqxmd.com/read/27825479/xopn-t3ss-effector-of-xanthomonas-axonopodis-pv-punicae-localizes-to-the-plasma-membrane-and-modulates-ros-accumulation-events-during-blight-pathogenesis-in-pomegranate
#20
Rishikesh Kumar, Madhvi Soni, Kalyan K Mondal
Bacterial blight caused by Xanthomonas axonopodis pv. punicae (Xap) is a major disease of pomegranate. Xap secretes effector proteins via type III secretion system (T3SS) to suppress pathogen-associated molecular pattern (PAMP)-triggered plant immunity (PTI). Previously we reported that XopN, a conserved effector of Xap, modulate in planta bacterial growth, and blight disease. In continuation to that here we report the deletion of XopN from Xap caused higher accumulation of reactive oxygen species (ROS) including H2O2 and O2(-)...
December 2016: Microbiological Research
keyword
keyword
8455
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"