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https://www.readbyqxmd.com/read/29782328/post-stroke-visual-neglect-affects-goal-directed-locomotion-in-different-perceptuo-cognitive-conditions-and-on-a-wide-visual-spectrum
#1
Tatiana Ogourtsova, Philippe S Archambault, Anouk Lamontagne
BACKGROUND: Unilateral spatial neglect (USN), a highly prevalent and disabling post-stroke deficit, has been shown to affect the recovery of locomotion. However, our current understanding of USN role in goal-directed locomotion control, and this, in different cognitive/perceptual conditions tapping into daily life demands, is limited. OBJECTIVES: To examine goal-directed locomotion abilities in individuals with and without post-stroke USN vs. healthy controls. METHODS: Participants (n = 45, n = 15 per group) performed goal-directed locomotion trials to actual, remembered and shifting targets located 7 m away at 0° and 15° right/left while immersed in a 3-D virtual environment...
2018: Restorative Neurology and Neuroscience
https://www.readbyqxmd.com/read/29782172/assembly-dynamics-of-plasmonic-dna-capped-gold-nanoparticle-monolayers
#2
Thomas L Derrien, Michelle Zhang, Patrick Dorion, Detlef-M Smilgies, Dan Luo
The self-assembly of nanoparticles in aqueous solutions promises wide applications but requires the careful balance of many parameters not present in organic solvents. While the presence of long-range electrostatic interactions in aqueous solutions may complicate such assemblies, they provide additional parameters through which to control self-assembly. Here, with DNA-capped gold nanoparticles and through variation of the ionic strength in aqueous solutions, we explored the influence of electrostatic interactions on the adsorption of negatively charged nanoparticles on a positively charged surface...
May 21, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29779875/three-dimensional-representation-of-motor-space-in-the-mouse-superior-colliculus
#3
Jonathan J Wilson, Nicolas Alexandre, Caterina Trentin, Marco Tripodi
From the act of exploring an environment to that of grasping a cup of tea, animals must put in register their motor acts with their surrounding space. In the motor domain, this is likely to be defined by a register of three-dimensional (3D) displacement vectors, whose recruitment allows motion in the direction of a target. One such spatially targeted action is seen in the head reorientation behavior of mice, yet the neural mechanisms underlying these 3D behaviors remain unknown. Here, by developing a head-mounted inertial sensor for studying 3D head rotations and combining it with electrophysiological recordings, we show that neurons in the mouse superior colliculus are either individually or conjunctively tuned to the three Eulerian components of head rotation...
May 15, 2018: Current Biology: CB
https://www.readbyqxmd.com/read/29779494/not-so-sweet-refrain-sugar-sweetened-beverage-taxes-industry-opposition-and-harnessing-the-lessons-learned-from-tobacco-control-legal-challenges
#4
Anita George
As a growing number of countries implement, or announce plans to introduce, a sugar-sweetened beverage (SSB) tax, this paper explores the public health rationale for such a tax and provides an overview of the international normative and policy instruments supporting the introduction of fiscal measures on sugary drinks. After examining parallels between the legal arguments raised by the food and beverage industry in opposition to SSB taxes and those raised by the tobacco industry in response to tobacco control measures, this paper draws four key lessons that will assist countries to design effective and robust SSB tax measures and counter food and beverage industry opposition: regulatory distinctions in tax coverage should be based on bona fide, evidence-based reasoning; evidence-based measures need to be tailored to a country's public health objectives as part of a comprehensive strategy to address unhealthy diet consumption; procedural requirements and due process should be observed in the drafting and implementation of the measure; and regulatory space exists within domestic constitutions, laws and international trade and investment agreements recognising the sovereign right of states to regulate in the interests of public health...
May 21, 2018: Health Economics, Policy, and Law
https://www.readbyqxmd.com/read/29778707/synthesis-spectroscopic-single-crystal-diffraction-and-potential-nonlinear-optical-properties-of-novel-pyrazoline-derivatives-interplay-of-experimental-and-computational-analyses
#5
Muhammad Nadeem Arshad, Abdulhadi Salih Birinji, Muhammad Khalid, Abdullah M Asiri, Khalid A Al-Amry, Faisal M S Aqlan, Ataualpa A C Braga
Pyrazoline are widely being studied due to their potential applications in chemical field. Herein, five pyrazolines compounds were synthesized and characterized spectroscopically using nuclear magnetic resonance techniques (1 H NMR &13 C NMR) to determine the structures of molecules along-with UV-Visible and infrared (FT-IR) studies for additional spectroscopic support in characterization of entitle synthesized molecules. Unit cells, specific space groups, bond lengths, bond angles and hydrogen bonding interactions were determined by the x-ray diffraction studies...
May 16, 2018: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/29777694/gapdh-targeted-therapy-a-new-approach-for-secondary-damage-after-traumatic-brain-injury-on-rats
#6
Vladimir F Lazarev, Elizaveta A Dutysheva, Elena Y Komarova, Elena R Mikhaylova, Irina V Guzhova, Boris A Margulis
Massive neuronal death caused by a neurodegenerative pathology or damage due to ischaemia or traumatic brain injury leads to the appearance of cytosolic proteins in the extracellular space. We found that one of the most abundant cellular polypeptides, glyceraldehyde-3-phosphate dehydrogenase (GAPDH), appearing in the medium of dying cells or body fluids is able to form aggregates that are cytotoxic to adjacent cells. Since we previously showed that the hydrocortisone derivative RX624 can inhibit the ability of GAPDH to transport the enzyme complex with polyglutamine and reduce the cytotoxicity of the complex, we explored the effects of GAPDH on SH-SY5Y neuroblastoma cells...
May 16, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29777033/sequential-binding-of-ezrin-and-moesin-to-l-selectin-regulates-monocyte-protrusive-behaviour-during-transmigration
#7
Angela Rey-Gallardo, Hannah Tomlins, Justin Joachim, Izajur Rahman, Phoebe Kitscha, Karen Frudd, Maddy Parsons, Aleksandar Ivetic
Leukocyte transendothelial migration (TEM) is absolutely fundamental to the inflammatory response, involving initial pseudopod protrusion and subsequent polarised migration across inflamed endothelium. Ezrin/radixin/moesin (ERM) proteins are expressed in leukocytes and mediate cell shape change and polarity. The spatio-temporal organisation of ERM with their targets, and their individual contribution to protrusion during TEM, has never been explored. Here we show that blocking PIP2 binding reduces C-terminal phosphorylation of moesin during monocyte TEM, and that on/off cycling of ERM activity is essential for pseudopod protrusion into the subendothelial space...
May 18, 2018: Journal of Cell Science
https://www.readbyqxmd.com/read/29776078/critical-properties-of-unlimited-gliding-unexpected-flocking-behavior-driven-by-the-exchange-of-information
#8
Marta Bigus-Kwiatkowska, Agata Fronczak, Piotr Fronczak
Inspired by albatrosses that use thermal lifts to fly across oceans we develop a simple model of gliders that serves us to study theoretical limitations of unlimited exploration of the Earth. Our studies, grounded in physical theory of continuous percolation and biased random walks, allow us to identify a variety of percolation transitions, which are understood as providing potentially unlimited movement through a space in a specified direction. We discover an unexpected phenomenon of self-organization of gliders in clusters, which resembles the flock organization of birds...
March 2018: Physical Review. E
https://www.readbyqxmd.com/read/29776054/least-rattling-feedback-from-strong-time-scale-separation
#9
Pavel Chvykov, Jeremy England
In most interacting many-body systems associated with some "emergent phenomena," we can identify subgroups of degrees of freedom that relax on dramatically different time scales. Time-scale separation of this kind is particularly helpful in nonequilibrium systems where only the fast variables are subjected to external driving; in such a case, it may be shown through elimination of fast variables that the slow coordinates effectively experience a thermal bath of spatially varying temperature. In this paper, we investigate how such a temperature landscape arises according to how the slow variables affect the character of the driven quasisteady state reached by the fast variables...
March 2018: Physical Review. E
https://www.readbyqxmd.com/read/29774494/peer-respites-a-qualitative-assessment-of-consumer-experience
#10
Elizabeth Siantz, Benjamin Henwood, Nicole McGovern, Joelle Greene, Todd Gilmer
This qualitative study explored the experiences of persons staying at two peer respites through interviews with 27 respite guests near the end of their stay and at 2-6 months following their stay. Trained peer interviewers conducted baseline and follow-up interviews. Peer respites can be beneficial spaces within the mental health system for guests to temporarily escape stressful situations while building relationships with other persons with mental illness, though some respondents were uncomfortable receiving services from peers, and several guests did not want to leave after their stay...
May 17, 2018: Administration and Policy in Mental Health
https://www.readbyqxmd.com/read/29773561/postnatal-brain-growth-assessed-by-sequential-cranial-ultrasonography-in-infants-born-30-weeks-gestational-age
#11
R Cuzzilla, A J Spittle, K J Lee, S Rogerson, F M Cowan, L W Doyle, J L Y Cheong
BACKGROUND AND PURPOSE: Brain growth in the early postnatal period following preterm birth has not been well described. This study of infants born at <30 weeks' gestational age and without major brain injury aimed to accomplish the following: 1) assess the reproducibility of linear measures made from cranial ultrasonography, 2) evaluate brain growth using sequential cranial ultrasonography linear measures from birth to term-equivalent age, and 3) explore perinatal predictors of postnatal brain growth...
May 17, 2018: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29773065/copper-catalyzed-azide-alkyne-cycloaddition-cuaac-mediated-macrocylization-of-peptides-impact-on-conformation-and-biological-activity
#12
Chiara Testa, Anna Maria Papini, Michael Chorev, Paolo Rovero
The long lasting impetus to design novel modes of macrocyclization, and their implementation into a wide range of bioactive peptides, originates from their contributions to the restriction of conformational space and the stabilization of preferential bioactive conformations that support higher efficacy and binding affinity to cognate macromolecular targets, improved specificity and lowering susceptibility to enzymatic degradation processes. Introducing CuI-catalyzed azide-alkyne cycloadditon (CuAAC), a prototypical click reaction, to the field of peptide sciences as a bio-orthogonal reaction that generates a disubstituted-[1,2,3]triazol-1-yl moiety as a pseudopeptidic bond that is peptidomimetic in nature, paved the way to its wide spread application as a new and promising mode of macrocyclization...
May 17, 2018: Current Topics in Medicinal Chemistry
https://www.readbyqxmd.com/read/29772856/-application-of-broad-easy-immediate-surgery-in-percutaneous-transforaminal-endoscopic-technology-for-lumbar-lateral-recess-stenosis-in-the-elderly
#13
Shi-Min Zhang, Guan-Nan Wu, Jiao Jin, Yu-Zhang Liu, Zuo-Xu Li, Zhao-Jie Zhang, Ming Ma, Tao Chong, Yong-Dong Zhang
OBJECTIVE: To explore the safety and effectiveness of percutaneous transforaminal endoscopic BEIS technology for lumbar lateral recess stenosis in the elderly. METHODS: From February 2014 to May 2016, 21 patients with lumbar lateral recess stenosis in elderly were treated with percutaneous endoscopic BEIS. There were 13 males and 8 females, aged from 70 to 85 years old with an average of 74.3 years. Preoperative, 1 and 12 months postoperative visual analogue scale(VAS) scores and Oswestry Disability Index(ODI) were statistically analyzed...
April 25, 2018: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29772690/peritoneal-carcinomatosis-targeting-with-tumor-homing-peptides
#14
REVIEW
Lorena Simón-Gracia, Hedi Hunt, Tambet Teesalu
Over recent decades multiple therapeutic approaches have been explored for improved management of peritoneally disseminated malignancies-a grim condition known as peritoneal carcinomatosis (PC). Intraperitoneal (IP) administration can be used to achieve elevated local concentration and extended half-life of the drugs in the peritoneal cavity to improve their anticancer efficacy. However, IP-administered chemotherapeutics have a short residence time in the IP space, and are not tumor selective. An increasing body of work suggests that functionalization of drugs and nanoparticles with targeting peptides increases their peritoneal retention and provides a robust and specific tumor binding and penetration that translates into improved therapeutic response...
May 16, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29772183/accurate-treatment-of-charge-transfer-excitations-and-thermally-activated-delayed-fluorescence-using-the-particle-particle-random-phase-approximation
#15
Rachael Al-Saadon, Christopher Sutton, Weitao Yang
Thermally activated delayed florescence (TADF) is a mechanism that increases the electroluminescence efficiency in organic light-emitting diodes by harnessing both singlet and triplet excitons. TADF is facilitated by a small energy difference between the first singlet (S1 ) and triplet (T1 ) excited states (ΔE(ST)), which is minimized by spatial separation of the donor and acceptor moieties. The resultant charge-transfer (CT) excited states are difficult to model using time-dependent density functional theory (TDDFT) because of the delocalization error present in standard density functional approximations to the exchange-correlation energy...
May 17, 2018: Journal of Chemical Theory and Computation
https://www.readbyqxmd.com/read/29771664/guided-policy-exploration-for-markov-decision-processes-using-an-uncertainty-based-value-of-information-criterion
#16
Isaac J Sledge, Matthew S Emigh, Jose C Principe
Reinforcement learning in environments with many action-state pairs is challenging. The issue is the number of episodes needed to thoroughly search the policy space. Most conventional heuristics address this search problem in a stochastic manner. This can leave large portions of the policy space unvisited during the early training stages. In this paper, we propose an uncertainty-based, information-theoretic approach for performing guided stochastic searches that more effectively cover the policy space. Our approach is based on the value of information, a criterion that provides the optimal tradeoff between expected costs and the granularity of the search process...
June 2018: IEEE Transactions on Neural Networks and Learning Systems
https://www.readbyqxmd.com/read/29771514/strong-electron-correlation-in-nitrogenase-cofactor-femoco
#17
Jason M Montgomery, David A Mazziotti
FeMoco, MoFe7 S9 C, has been shown to be the active catalytic site for the reduction of nitrogen to ammonia in the nitrogenase protein. An understanding of its electronic structure including strong electron correlation is key to designing mimic catalysts capable of ambient nitrogen fixation. Active spaces ranging from [54, 54] to [65, 57] have been predicted for a quantitative description of FeMoco's electronic structure. However, a wave function approach for a singlet state using a [54, 54] active space would require 1029 variables...
May 17, 2018: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/29771431/study-of-molecular-mechanisms-of-learning-and-memory-impairment-in-neonatal-rats-post-intrauterine-distress-via-the-pathway-of-tau-protein-hyperphosphorylation
#18
X-S Wang, H Huang
OBJECTIVE: To explore the reversion of the excitatory amino acid receptor antagonists against the impairment of learning-memory and the hyperphosphorylation of protein Tau induced by fetal intrauterine distress in neonatal rats. MATERIALS AND METHODS: The analysis of variance of factorial design set up two intervention factors, fetal intrauterine distress (two levels: no fetal intrauterine distress and a course of fetal intrauterine distress) and the excitatory amino acid receptor antagonists (three levels: Saline; NMDA receptor antagonist MK-801; astragalosides)...
May 2018: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/29771363/multiple-sequence-alignment-averaging-improves-phylogeny-reconstruction
#19
Haim Ashkenazy, Itamar Sela, Eli Levy Karin, Giddy Landan, Tal Pupko
The classic methodology of inferring a phylogenetic tree from sequence data is composed of two steps. First, a multiple sequence alignment (MSA) is computed. Then, a tree is reconstructed assuming the MSA is correct. Yet, inferred MSAs were shown to be inaccurate and alignment errors reduce tree inference accuracy. It was previously proposed that filtering unreliable alignment regions can increase the accuracy of tree inference. However, it was also demonstrated that the benefit of this filtering is often obscured by the resulting loss of phylogenetic signal...
May 15, 2018: Systematic Biology
https://www.readbyqxmd.com/read/29771084/-the-long-term-effect-analysis-of-the-tongue-base-traction-hyoid-suspension-with-repose-system-in-multiplanar-surgery
#20
Y Zhang, Z X Liu, N D Zheng, W J Wang, X J Wang, M L Meng, Q Wang, Y Cao, Z J Li
Objective: To explore the long-term effect of Repose bone screw system in the treatment of severe obstructive sleep apnea syndrome in patients with severe obstructive sleep apnea. Method: The follow-up group was divided into the short-term (<12 months, control group, 30 cases) and the long-term (more than 12 months, observation, 46 cases). And compared the operation effect of the two groups. Furthermore, the parameters and related factors of surgical efficacy of patients with different follow-up time and different surgical methods were further analyzed...
May 2018: Journal of Clinical Otorhinolaryngology, Head, and Neck Surgery
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