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https://www.readbyqxmd.com/read/27913591/temporal-expectations-guide-dynamic-prioritization-in-visual-working-memory-through-attenuated-alpha-oscillations
#1
Freek van Ede, Marcel Niklaus, Anna C Nobre
: While working memory is generally considered a highly dynamic mnemonic store, popular laboratory tasks employed to understand its psychological and neural mechanisms (such as change detection and continuous reproduction) often remain relatively "static", involving the retention of a set number of items throughout a shared delay interval. In the current study, we investigated visual working memory in a more dynamic setting, and assessed: 1) whether internally guided temporal expectations can dynamically and reversibly prioritize individual mnemonic items at specific times at which they are deemed most relevant and 2) the neural substrates that support such dynamic prioritization...
December 2, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27913121/loss-of-control-eating-after-sleeve-gastrectomy-surgery
#2
Valentina Ivezaj, Erin E Kessler, Janet A Lydecker, Rachel D Barnes, Marney A White, Carlos M Grilo
BACKGROUND: Postoperative loss-of-control (LOC) eating is related to poorer weight loss outcomes after bariatric surgery, but little is known about LOC eating after sleeve gastrectomy surgery. OBJECTIVES: To examine LOC eating severity and weight loss after sleeve gastrectomy SETTING: University School of Medicine, United States METHODS: Participants were 71 individuals (84.5% female; n = 60) who underwent sleeve gastrectomy surgery within the previous 4 to 9 months and reported LOC eating at least once weekly during the previous 28 days...
October 1, 2016: Surgery for Obesity and related Diseases: Official Journal of the American Society for Bariatric Surgery
https://www.readbyqxmd.com/read/27912019/dynamic-n-occupancy-models-estimating-demographic-rates-and-local-abundance-from-detection-nondetection-data
#3
Sam Rossman, Charles B Yackulic, Sarah P Saunders, Janice Reid, Ray Davis, Elise F Zipkin
Occupancy modeling is a widely used analytical technique for assessing species distributions and range dynamics. However, occupancy analyses frequently ignore variation in abundance of occupied sites, even though site abundances affect many of the parameters being estimated (e.g., extinction, colonization, detection probability). We introduce a new model ("dynamic N-occupancy") capable of providing accurate estimates of local abundance, population gains (reproduction/immigration), and apparent survival probabilities while accounting for imperfect detection using only detection/nondetection data...
December 2016: Ecology
https://www.readbyqxmd.com/read/27910834/solvates-of-selected-fenamic-acids-with-substituted-pyridines-structure-thermal-stability-and-desolvation
#4
Jacky S Bouanga Boudiombo, Ayesha Jacobs
Mefenamic acid (MA) formed solvates with 2-picoline (2PIC), 3-picoline (3PIC), 4-picoline (4PIC) and 3-chloropyridine (3CLPYR). The solvates crystallized in the space group P\bar 1 with the carboxylic acid of MA hydrogen-bonded to the nitrogen of the substituted pyridine. Tolfenamic acid (TFA) formed solvates with 2PIC and 3PIC, the crystal structures successfully solved in the space groups P21/n and Pbca, respectively. The fenamate conformation varied depending on the acid and the included solvent. Similarities were observed in the structures involving MA...
December 1, 2016: Acta Crystallographica Section B, Structural Science, Crystal Engineering and Materials
https://www.readbyqxmd.com/read/27910833/cu-ii-and-zn-ii-%C3%AE-diketonate-coordination-polymers-based-on-pyrimidin-2-amine-pyrazine-and-1-2-bis-4-pyridyl-ethane
#5
Franc Perdih
Copper(II) and zinc(II) bis(4,4,4-trifluoro-1-phenylbutane-1,3-dionato) compounds with pyrimidin-2-amine (pyr2a), pyrazine (pyz) and 1,2-bis(4-pyridyl)ethane (dpet) were prepared and solid-state structures of coordination polymers [M(tfpb)2(pyr2a)]∞ [M = Cu (1), Zn (2); tfpb = 4,4,4-trifluoro-1-phenylbutane-1,3-dionate], [M(tfpb)2(pyz)]∞ [M = Cu (3), Zn (4a, 4b)] and [Cu(tfpb)2(dpet)]∞ (5), respectively, were determined by single-crystal X-ray analysis. The coordination of metal centers in all compounds is octahedral with nitrogen ligands occupying the axial positions...
December 1, 2016: Acta Crystallographica Section B, Structural Science, Crystal Engineering and Materials
https://www.readbyqxmd.com/read/27910832/vacancy-pairing-and-superstructure-in-the-high-pressure-silicate-k1-5mg2si2o7h0-5-a-new-potential-host-for-potassium-in-the-deep-earth
#6
M D Welch, L Bindi, V Petříček, J Plášil
The high-pressure silicate K1.5Mg2Si2O7H0.5, synthesized and characterized by Welch et al. [(2012), Am. Mineral. 97, 1849-1857], has been re-examined with the aim of determining the nature of the superstructure noted in their study. The composition corresponds to a 1:1 combination of KMg2Si2O7H and K2Mg2Si2O7 end-members, but it is not a solid solution. Single-crystal X-ray diffraction data for one of the original K1.5Mg2Si2O7H0.5 crystals synthesized at 16 GPa/1573 K, has been collected using a much longer exposure time in order to improve the intensity statistics of weak superlattice reflections identified by Welch et al...
December 1, 2016: Acta Crystallographica Section B, Structural Science, Crystal Engineering and Materials
https://www.readbyqxmd.com/read/27910658/a-total-station-spatial-positioning-method-based-on-rotary-laser-scanning-and-ultrasonic-ranging
#7
Jun Wu, Jigui Zhu, Zhijing Yu, Jingchang Zhuge, Bin Xue
Total station spatial coordinator measuring technology is extensively applied in the large-scale measurement of industrial assembly and manufacturing for its flexibility and adaptability. The existing total station technology has some principal limits such as poor efficiency and single tasking; in order to achieve the total station spatial coordinator measuring technology with the advantages of multi-task, real-time measurement, and high accuracy, this paper presents a novel total station measurement method by using multi-laser plane constraints established through rotating planar planes and distance information obtained with an ultrasonic ranging method...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27909873/neutrophil-to-lymphocyte-ratio-associated-with-prognosis-of-lung-cancer
#8
V Bar-Ad, J Palmer, L Li, Y Lai, B Lu, R E Myers, Z Ye, R Axelrod, J M Johnson, M Werner-Wasik, S W Cowan, N R Evans, B T Hehn, C C Solomides, C Wang
PURPOSE: Many studies recently focus on complicated and expensive genomic tests, but the prognostic values of biochemical markers which are easily obtained in clinics are largely overlooked and without further exploration. This study assesses the association of neutrophil-lymphocyte-ratio (NLR) with prognosis of lung cancer patients. METHODS: In 1032 patients with histologically confirmed lung cancer, the association of pretreatment NLR values with overall survival (OS) was evaluated using a Cox proportional hazards model and the temporal relationship of longitudinal NLR was assessed using a mixed effects model...
December 1, 2016: Clinical & Translational Oncology
https://www.readbyqxmd.com/read/27908097/molecular-dynamics-analysis-of-the-effect-of-electronic-polarization-on-the-structure-and-single-particle-dynamics-of-mixtures-of-ionic-liquids-and-lithium-salts
#9
Volker Lesch, Hadrián Montes-Campos, Trinidad Méndez-Morales, Luis Javier Gallego, Andreas Heuer, Christian Schröder, Luis M Varela
We report a molecular dynamics study on the effect of electronic polarization on the structure and single-particle dynamics of mixtures of the aprotic ionic liquid 1-ethyl-3-methylimidazolium bis-(trifluoromethylsulfonyl)-imide ([EMIM][TFSI]) doped with a lithium salt with the same anion at 298 K and 1 bar. In particular, we analyze the effect of electron density fluctuations on radial distribution functions, velocity autocorrelation functions, cage correlation functions, mean-squared displacements, and vibrational densities of states, comparing the predictions of the quantum-chemistry-based Atomistic Polarizable Potential for Liquids, Electrolytes, & Polymers (APPLE&P) with those of its nonpolarizable version and those of the standard non-polarizable Optimized Potentials for Liquid Simulations-All Atom (OPLS-AA)...
November 28, 2016: Journal of Chemical Physics
https://www.readbyqxmd.com/read/27907202/a-reproducible-method-for-isolation-and-in-vitro-culture-of-functional-human-lymphoid-stromal-cells-from-tonsils
#10
Yotam E Bar-Ephraim, Tanja Konijn, Mehmet Gönültas, Reina E Mebius, Rogier M Reijmers
The stromal compartment of secondary lymphoid organs is classicaly known for providing a mechanical scaffold for the complex interactions between hematopoietic cells during immune activation as well as for providing a niche which is favorable for survival of lymphocytes. In recent years, it became increasingly clear that these cells also play an active role during such a response. Currently, knowledge of the interactions between human lymphoid stroma and hematopoietic cells is still lacking and most insight is based on murine systems...
2016: PloS One
https://www.readbyqxmd.com/read/27906811/measurement-of-radial-peripapillary-capillary-density-in-the-normal-human-retina-using-optical-coherence-tomography-angiography
#11
Tarannum Mansoori, Jayanthi Sivaswamy, Jahnavi Sai Gamalapati, Satish Gooty Agraharam, Nagalla Balakrishna
AIM: To image the radial peripapillary capillary (RPC) network with optical coherence tomography angiography (OCTA) and measure its capillary density (CD) in the normal human retina. MATERIALS AND METHODS: Fifty-two normal participants underwent OCTA imaging with RTVue XR 100 Avanti OCT. The angioflow enface RPCs network was extracted from OCTA and 8 peripapillary sectors with a sector angle of 45 degrees were selected for quantitative analysis: superior nasal, superior temporal, temporal upper, temporal lower, nasal upper, nasal lower, inferior nasal, and inferior temporal...
November 30, 2016: Journal of Glaucoma
https://www.readbyqxmd.com/read/27906363/construction-of-the-optical-part-of-a-time-of-flight-detector-prototype-for-the-afp-detector
#12
L Nozka, L Adamczyk, G Avoni, A Brandt, P Buglewicz, E Cavallaro, G Chiodini, L Chytka, K Ciesla, P M Davis, M Dyndal, S Grinstein, P Hamal, M Hrabovsky, K Janas, K Jirakova, M Kocian, T Komarek, K Korcyl, J Lange, D Mandat, V Michalek, I Lopez Paz, D Northacker, M Rijssenbeek, L Seabra, P Schovanek, R Staszewski, P Swierska, T Sykora
We present the construction of the optical part of the ToF (time-of-flight) subdetector prototype for the AFP (ATLAS Forward Proton) detector. The ToF detector in conjunction with a 3D silicon pixel tracker will tag and measure protons originating in central exclusive interactions p + p → p + X + p, where the two outgoing protons are scattered in the very forward directions. The ToF is required to reduce so-called pileup backgrounds that arise from multiple proton interactions in the same bunch crossing at high luminosity...
November 28, 2016: Optics Express
https://www.readbyqxmd.com/read/27906212/influence-of-co-sub-2-sub-pressure-on-the-emission-spectra-and-plasma-parameters-in-underwater-laser-induced-breakdown-spectroscopy
#13
Christian L Goueguel, Dustin L McIntyre, Jinesh C Jain
Optical emission spectroscopic studies have been carried out to investigate the pressure effect of CO<sub>2</sub> on laser-produced underwater plasma. The plasma was generated by focusing 1064 nm, 6 ns pulses from a Nd:YAG laser in a CO<sub>2</sub>-bearing solution. The temporal evolution of the continuum emission, Sr and Ba lines, and plasma electron density and temperature was characterized under CO<sub>2</sub> pressure ranging from 10 to 300 bars. The electron density measurements were made using the Stark broadening of the 455...
December 1, 2016: Optics Letters
https://www.readbyqxmd.com/read/27906169/automated-identification-of-mouse-visual-areas-with-intrinsic-signal-imaging
#14
Ashley L Juavinett, Ian Nauhaus, Marina E Garrett, Jun Zhuang, Edward M Callaway
Intrinsic signal optical imaging (ISI) is a rapid and noninvasive method for observing brain activity in vivo over a large area of the cortex. Here we describe our protocol for mapping retinotopy to identify mouse visual cortical areas using ISI. First, surgery is performed to attach a head frame to the mouse skull (∼1 h). The next day, intrinsic activity across the visual cortex is recorded during the presentation of a full-field drifting bar in the horizontal and vertical directions (∼2 h). Horizontal and vertical retinotopic maps are generated by analyzing the response of each pixel during the period of the stimulus...
January 2017: Nature Protocols
https://www.readbyqxmd.com/read/27905592/the-conformational-landscape-of-2-4-fluoro-phenyl-ethylamine-consequences-of-fluorine-substitution-at-the-para-position
#15
Afik Shachar, Nitzan Mayorkas, Hanan Sachs, Ilana Bar
Fluorination is considered as a possible means for alteration of conformational landscapes in molecules. The effect of fluorine substitution was studied here by measuring the vibronic and vibrational spectra of gas phase 2-(4-fluoro-phenyl)-ethylamine (4-FPEA) by resonant two-photon ionization (R2PI) and by ionization-loss stimulated Raman spectroscopy (ILSRS). The measurement of survey ILSR spectra of 4-FPEA in the amino group region allowed to associate the bands in the R2PI spectrum to origin and vibronic transitions of the ground (S0) to the excited (S1) electronic states of three different conformers...
December 1, 2016: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/27904094/design-and-synthesis-of-functional-molecules-based-on-complexation-and-their-biological-applications
#16
Yosuke Hisamatsu
 In this review, we introduce the development of supermolecules, host-guest complexes, and metal complexes formed from the combination of non-covalent interactions and/or coordination bonds, as well as their biological applications. An adenine selective host molecule 1 provides a correctly oriented array of complementary hydrogen bonding sites for the adenine nucleobase. Furthermore, the new DDAA (D: hydrogen bond donor, A: hydrogen bond acceptor) module 4 and ADDA module 7 have been developed as quadruple hydrogen-bonding modules...
2016: Yakugaku Zasshi: Journal of the Pharmaceutical Society of Japan
https://www.readbyqxmd.com/read/27904090/effect-of-bidirectional-loading-on-contact-and-force-characteristics-under-a-newly-developed-masticatory-simulator-with-a-dual-direction-loading-system
#17
Weerachai Singhatanadgit, Puttiporn Junkaew, Pairod Singhatanadgid
Mechanical responses of the test specimen under bidirectional and unidirectional loading were investigated using a newly developed masticatory simulator. The simulator adopted a four-bar linkage mechanism to create both loading patterns. Scratch/occlusal contact characteristics, contact force profiles and the fracture of restored tooth samples were investigated. With bidirectional loading, which imitates the nature of human chewing cycle closer than the unidirectional loading does, the occlusal contact was ovoid in shape whereas a small circular area was observed from the test with unidirectional loading...
2016: Dental Materials Journal
https://www.readbyqxmd.com/read/27903707/formation-of-long-term-locomotor-memories-is-associated-with-functional-connectivity-changes-in-the-cerebellar-thalamic-cortical-network
#18
Firas Mawase, Simona Bar-Haim, Lior Shmuelof
: Although motor adaptation is typically rapid, accumulating evidence shows that it is also associated with long-lasting behavioural and neuronal changes. Two processes were suggested to explain the formation of long-term motor memories: recall -- reflecting a retrieval of previous motor actions, and faster relearning -- reflecting an increased sensitivity to errors. While these manifestations of motor memories were initially demonstrated in the context of adaptation experiments in reaching, indications of long-term motor memories were also recently demonstrated in other kinds of adaptation, such as in locomotor adaptation...
November 30, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27903554/a-new-microextraction-technique-for-the-assay-of-alkaloids-in-chinese-compound-formula-based-polyether-sulfone-membrane-fiber-decorated-by-tio2-nanoparticles
#19
Xinjie Sun, Yingqin Wei, Baojuan Hou, Guowei Zhou
A new nanocomposite membrane was used to clean up impurities from complex samples and the obvious synergy was obtained in this paper. The nanocomposite membrane was prepared by dispersing TiO2 nanoparticles in chloroform and filled in the pores and lumen of polyether sulfone membrane fiber. The novel microextraction method showed the ideal selective extraction effect for alkaloids in the formulae composed of Rhizoma coptidis and the excellent clean-up efficiency compared with the single membrane method. The optimum extraction conditions were as follows: chloroform as accepted phase; the number of nanocomposite membrane fiber bars, 7; extraction time, 30 min; pH of the sample solution, 10...
November 29, 2016: Journal of Chromatographic Science
https://www.readbyqxmd.com/read/27903141/does-the-second-amendment-protect-the-gun-rights-of-persons-with-mental-illness
#20
Paul S Appelbaum
Under federal law, persons who have been involuntarily hospitalized for psychiatric reasons are permanently barred from gun possession. That policy was challenged in 2012 by a Michigan man who had been committed 25 years earlier and who was blocked in 2011 from buying a gun. Considering his claim, the Sixth Circuit held that people with mental illness are not categorically excluded from Second Amendment protection and that an irreversible lifetime ban was unconstitutional. Although many mental health organizations and practitioners favor gun restrictions, they oppose discriminatory treatment of persons with mental illness, creating ambivalence about the decision, which presages greater involvement of mental health professionals in decisions regarding gun rights restoration...
December 1, 2016: Psychiatric Services: a Journal of the American Psychiatric Association
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