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https://www.readbyqxmd.com/read/28350949/state-of-the-art-in-degenerative-cervical-myelopathy-an-update-on-current-clinical-evidence
#1
Jefferson R Wilson, Lindsay A Tetreault, Jun Kim, Mohammed F Shamji, James S Harrop, Thomas Mroz, Samuel Cho, Michael G Fehlings
Degenerative cervical myelopathy (DCM) is a common cause of spinal cord dysfunction that confronts clinicians on a daily basis. Research performed over the past few decades has provided improved insight into the diagnosis, evaluation, and treatment of this disorder. We aim to provide clinicians with an update regarding the state of the art in DCM, focusing on more recent research pertaining to pathophysiology, natural history, treatment, consideration of the minimally symptomatic patient, surgical outcome prediction, and outcome measurement...
March 1, 2017: Neurosurgery
https://www.readbyqxmd.com/read/28346904/single-particle-mass-spectral-signatures-from-vehicle-exhaust-particles-and-the-source-apportionment-of-on-line-pm2-5-by-single-particle-aerosol-mass-spectrometry
#2
Jian Yang, Shexia Ma, Bo Gao, Xiaoying Li, Yanjun Zhang, Jing Cai, Mei Li, Ling'ai Yao, Bo Huang, Mei Zheng
In order to accurately apportion the many distinct types of individual particles observed, it is necessary to characterize fingerprints of individual particles emitted directly from known sources. In this study, single particle mass spectral signatures from vehicle exhaust particles in a tunnel were performed. These data were used to evaluate particle signatures in a real-world PM2.5 apportionment study. The dominant chemical type originating from average positive and negative mass spectra for vehicle exhaust particles are EC species...
March 24, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28346317/the-csf-immune-response-in-hiv-1-associated-cryptococcal-meningitis-macrophage-activation-correlates-of-disease-severity-and-effect-of-antiretroviral-therapy
#3
James E Scriven, Lisa M Graham, Charlotte Schutz, Thomas J Scriba, Katalin A Wilkinson, Robert J Wilkinson, David R Boulware, Britta C Urban, Graeme Meintjes, David G Lalloo
BACKGROUND: Immune modulation may improve outcome in HIV-associated cryptococcal meningitis. Animal studies suggest alternatively activated macrophages are detrimental but human studies are limited. We performed a detailed assessment of the cerebrospinal fluid (CSF) immune response and examined immune correlates of disease severity and poor outcome, and the effects of antiretroviral therapy (ART). METHODOLOGY: We enrolled persons ≥18 years with first episode of HIV-associated cryptococcal meningitis...
March 24, 2017: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/28345935/targeting-self-binding-peptides-as-a-novel-strategy-to-regulate-protein-activity-and-function-a-case-study-on-the-proto-oncogene-tyrosine-protein-kinase-c-src
#4
Zhengya Bai, Shasha Hou, Shilei Zhang, Zhongyan Li, Peng Zhou
Previously, we have reported a new biomolecular phenomenon spanning between protein folding and binding, termed as self-binding peptides (SBPs), where a short peptide segment in monomeric protein functions as molecular switch by dynamically binding to/unbinding from its cognate domain in the monomer (Yang C, Zhang S, He P, Wang C, Huang J, Zhou P. Self-binding peptides: folding or binding? J. Chem. Inf. MODEL: 2015, 55: 329-342). Here, we attempt to raise the SBP as a new class of druggable targets to regulate the biological activity and function of proteins...
March 27, 2017: Journal of Chemical Information and Modeling
https://www.readbyqxmd.com/read/28345907/simulating-protein-mediated-hydrolysis-of-atp-and-other-nucleoside-triphosphates-by-combining-qm-mm-molecular-dynamics-with-advances-in-metadynamics
#5
Rui Sun, Olaseni Sode, James F Dama, Gregory A Voth
The protein mediated hydrolysis of nucleoside triphosphates such as ATP or GTP is one of the most important and challenging biochemical reactions in nature. The chemical environment (water structure, catalytic metal, and amino acid residues) adjacent to the hydrolysis site contains hundreds of atoms, usually greatly limiting the amount of the free energy sampling that one can achieve from computationally demanding electronic structure calculations such as QM/MM simulations. Therefore, the combination of QM/MM molecular dynamics with the recently developed Transition-tempered Metadynamics (TTMetaD), an enhanced sampling method that can provide a high-quality free energy estimate at an early stage in a simulation, is an ideal approach to address the biomolecular nucleoside triphosphate hydrolysis problem...
March 27, 2017: Journal of Chemical Theory and Computation
https://www.readbyqxmd.com/read/28345687/recent-advances-in-high-performance-fluorescent-and-bioluminescent-rna-imaging-probes
#6
REVIEW
Yuqiong Xia, Ruili Zhang, Zhongliang Wang, Jie Tian, Xiaoyuan Chen
RNA plays an important role in life processes. Imaging of messenger RNAs (mRNAs) and micro-RNAs (miRNAs) not only allows us to learn the formation and transcription of mRNAs and the biogenesis of miRNAs involved in various life processes, but also helps in detecting cancer. High-performance RNA imaging probes greatly expand our view of life processes and enhance the cancer detection accuracy. In this review, we summarize the state-of-the-art high-performance RNA imaging probes, including exogenous probes that can image RNA sequences with special modification and endogeneous probes that can directly image endogenous RNAs without special treatment...
March 27, 2017: Chemical Society Reviews
https://www.readbyqxmd.com/read/28345220/boosting-the-performance-of-the-nickel-anode-in-the-oxygen-evolution-reaction-by-simple-electrochemical-activation
#7
Tatsuya Shinagawa, Marcus Tze-Kiat Ng, Kazuhiro Takanabe
The development of cost-effective and active water-splitting electrocatalysts that work at mild pH is an essential step towards the realization of sustainable energy and material circulation in our society. Its success requires a drastic improvement in the kinetics of the anodic half-reaction of the oxygen evolution reaction (OER), which determines the overall system efficiency to a large extent. A simple electrochemical protocol has been developed to activate Ni electrodes, by which a stable NiOOH phase was formed, which could weakly bind to alkali-metal cations...
March 27, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28344672/the-perceived-benefits-of-an-arts-project-for-health-and-wellbeing-of-older-offenders
#8
Dean J Wilkinson, Laura S Caulfield
The increasing ageing prison population is becoming a pressing issue throughout the criminal justice system. Alongside the rising population, are a host of health and wellbeing issues that contribute to older offenders needs whilst in prison. It has been recommended that meaningful activities can have positive effects on this population and therefore this paper uniquely reviews older offenders accounts of taking part in an arts based project, Good Vibrations, whilst imprisoned. The Good Vibrations project engages individuals in Gamelan music making with an end of project performance...
March 2017: Europe's journal of psychology
https://www.readbyqxmd.com/read/28344611/percutaneous-pulmonary-valve-implantation-state-of-the-art-and-polish-experience
#9
REVIEW
Elżbieta K Biernacka, Witold Rużyłło, Marcin Demkow
Percutaneous pulmonary valve implantation (PPVI) is a relatively new method of treating patients with right ventricular outflow tract (RVOT) dysfunction after surgical repair of congenital heart disease. Since its introduction in 2000 by Bonhoeffer, more than ten thousand PPVI procedures have been performed worldwide. Indications for PPVI have been adapted from those accepted for surgical intervention. Two types of valves are being used: Melody Medtronic available in diameters 16 mm and 18 mm and the family of Edwards SAPIEN valves 23, 26 and 29...
2017: Postępy W Kardiologii Interwencyjnej, Advances in Interventional Cardiology
https://www.readbyqxmd.com/read/28343742/automatic-matching-of-surgeries-to-predict-surgeons-next-actions
#10
Germain Forestier, François Petitjean, Laurent Riffaud, Pierre Jannin
OBJECTIVE: More than half a million surgeries are performed every day worldwide, which makes surgery one of the most important component of global health care. In this context, the objective of this paper is to introduce a new method for the prediction of the possible next task that a surgeon is going to perform during surgery. MATERIAL AND METHOD: We formulate the problem as finding the optimal registration of a partial sequence to a complete reference sequence of surgical activities...
March 23, 2017: Artificial Intelligence in Medicine
https://www.readbyqxmd.com/read/28342105/real-time-surgical-tool-tracking-and-pose-estimation-using-a-hybrid-cylindrical-marker
#11
Lin Zhang, Menglong Ye, Po-Ling Chan, Guang-Zhong Yang
PURPOSE: To provide an integrated visualisation of intraoperative ultrasound and endoscopic images to facilitate intraoperative guidance, real-time tracking of the ultrasound probe is required. State-of-the-art methods are suitable for planar targets while most of the laparoscopic ultrasound probes are cylindrical objects. A tracking framework for cylindrical objects with a large work space will improve the usability of the intraoperative ultrasound guidance. METHODS: A hybrid marker design that combines circular dots and chessboard vertices is proposed for facilitating tracking cylindrical tools...
March 24, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28342071/estimating-psychological-networks-and-their-accuracy-a-tutorial-paper
#12
Sacha Epskamp, Denny Borsboom, Eiko I Fried
The usage of psychological networks that conceptualize behavior as a complex interplay of psychological and other components has gained increasing popularity in various research fields. While prior publications have tackled the topics of estimating and interpreting such networks, little work has been conducted to check how accurate (i.e., prone to sampling variation) networks are estimated, and how stable (i.e., interpretation remains similar with less observations) inferences from the network structure (such as centrality indices) are...
March 24, 2017: Behavior Research Methods
https://www.readbyqxmd.com/read/28339747/deep-learning-for-pharmacovigilance-recurrent-neural-network-architectures-for-labeling-adverse-drug-reactions-in-twitter-posts
#13
Anne Cocos, Alexander G Fiks, Aaron J Masino
Objective: Social media is an important pharmacovigilance data source for adverse drug reaction (ADR) identification. Human review of social media data is infeasible due to data quantity, thus natural language processing techniques are necessary. Social media includes informal vocabulary and irregular grammar, which challenge natural language processing methods. Our objective is to develop a scalable, deep-learning approach that exceeds state-of-the-art ADR detection performance in social media...
February 22, 2017: Journal of the American Medical Informatics Association: JAMIA
https://www.readbyqxmd.com/read/28339486/a-top-down-manner-based-dcnn-architecture-for-semantic-image-segmentation
#14
Kai Qiao, Jian Chen, Linyuan Wang, Lei Zeng, Bin Yan
Given their powerful feature representation for recognition, deep convolutional neural networks (DCNNs) have been driving rapid advances in high-level computer vision tasks. However, their performance in semantic image segmentation is still not satisfactory. Based on the analysis of visual mechanism, we conclude that DCNNs in a bottom-up manner are not enough, because semantic image segmentation task requires not only recognition but also visual attention capability. In the study, superpixels containing visual attention information are introduced in a top-down manner, and an extensible architecture is proposed to improve the segmentation results of current DCNN-based methods...
2017: PloS One
https://www.readbyqxmd.com/read/28339444/a-review-of-long-term-pain-relief-after-genicular-nerve-radiofrequency-ablation-in-chronic-knee-osteoarthritis
#15
Ferdinand Iannaccone, Samuel Dixon, Andrew Kaufman
BACKGROUND: Studies of radiofrequency ablation (RFA) of genicular nerves have reportedly significantly decreased pain up to 3 months post ablation, but no longer term effects have been reported. We performed an analysis of long-term pain relief of 31 RFA procedures of the genicular nerves to analyze the degree of pain relief past 3 months, culminating at 6 months. STUDY DESIGN: Chart review and study design was approved by Newark Health Sciences Institutional Review Board (IRB)...
March 2017: Pain Physician
https://www.readbyqxmd.com/read/28337429/investigating-cardiac-motion-patterns-using-synthetic-high-resolution-3d-cardiovascular-magnetic-resonance-images-and-statistical-shape-analysis
#16
Benedetta Biffi, Jan L Bruse, Maria A Zuluaga, Hopewell N Ntsinjana, Andrew M Taylor, Silvia Schievano
Diagnosis of ventricular dysfunction in congenital heart disease is more and more based on medical imaging, which allows investigation of abnormal cardiac morphology and correlated abnormal function. Although analysis of 2D images represents the clinical standard, novel tools performing automatic processing of 3D images are becoming available, providing more detailed and comprehensive information than simple 2D morphometry. Among these, statistical shape analysis (SSA) allows a consistent and quantitative description of a population of complex shapes, as a way to detect novel biomarkers, ultimately improving diagnosis and pathology understanding...
2017: Frontiers in Pediatrics
https://www.readbyqxmd.com/read/28337129/novel-neuromodulation-techniques-to-assess-interhemispheric-communication-in-neural-injury-and-neurodegenerative-diseases
#17
REVIEW
Samuel S Shin, Galit Pelled
Interhemispheric interaction has a major role in various neurobehavioral functions. Its disruption is a major contributor to the pathological changes in the setting of brain injury such as traumatic brain injury, peripheral nerve injury, and stroke, as well as neurodegenerative diseases. Because interhemispheric interaction has a crucial role in functional consequence in these neuropathological states, a review of noninvasive and state-of-the-art molecular based neuromodulation methods that focus on or have the potential to elucidate interhemispheric interaction have been performed...
2017: Frontiers in Neural Circuits
https://www.readbyqxmd.com/read/28336065/folding-and-dynamics-based-electrochemical-dna-sensors
#18
Rebecca Y Lai
A number of electrochemical DNA sensors based on the target-induced change in the conformation and/or flexibility of surface-bound oligonucleotides have been developed in recent years. These sensors, which are often termed E-DNA sensors, are comprised of an oligonucleotide probe modified with a redox label (e.g., methylene blue) at one terminus and attached to a gold electrode via a thiol-gold bond at the other. Binding of the target to the DNA probe changes its structure and dynamics, which, in turn, influences the efficiency of electron transfer to the interrogating electrode...
2017: Methods in Enzymology
https://www.readbyqxmd.com/read/28335415/time-modulated-arrays-from-their-origin-to-their-utilization-in-wireless-communication-systems
#19
REVIEW
Roberto Maneiro-Catoira, Julio Brégains, José A García-Naya, Luis Castedo
Time-modulated arrays (TMAs) are electromagnetic systems whose radiated power pattern is controlled by the application of variable-width periodical pulses to the individual elements. The nonlinear nature of the array operation causes the appearance of radiation patterns at the harmonic frequencies of such periodic pulses. The technique can be used for improving the side-lobe level (SLL) topology of the radiation pattern at the central frequency and/or to profitably exploit the harmonic patterns in order to supply smart antenna capabilities...
March 14, 2017: Sensors
https://www.readbyqxmd.com/read/28334306/peptidemapper-efficient-and-versatile-amino-acid-sequence-and-tag-mapping
#20
Dominik Kopczynski, Harald Barsnes, Pål R Njølstad, Albert Sickmann, Marc Vaudel, Robert Ahrends
Summary: The mapping of amino acid sequences is an essential task in bioinformatics. Notably, the mapping of peptide sequences on a proteome is required for the post-processing of proteomics results. However, this step can quickly become a bottleneck when working with extensive numbers of peptides or large protein sequence databases. Here, we present PeptideMapper, a novel amino acid sequence mapper for both peptide sequences and de novo sequencing identification results. By taking advantage of the latest advances in pattern matching, PeptideMapper achieves unprecedented performance (i...
March 2, 2017: Bioinformatics
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