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https://www.readbyqxmd.com/read/28108489/processing-of-egomotion-consistent-optic-flow-in-the-rhesus-macaque-cortex
#1
Benoit R Cottereau, Andrew T Smith, Samy Rima, Denis Fize, Yseult Héjja-Brichard, Luc Renaud, Camille Lejards, Nathalie Vayssière, Yves Trotter, Jean-Baptiste Durand
The cortical network that processes visual cues to self-motion was characterized with functional magnetic resonance imaging in 3 awake behaving macaques. The experimental protocol was similar to previous human studies in which the responses to a single large optic flow patch were contrasted with responses to an array of 9 similar flow patches. This distinguishes cortical regions where neurons respond to flow in their receptive fields regardless of surrounding motion from those that are sensitive to whether the overall image arises from self-motion...
January 19, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/28107466/thermal-conductivity-performance-of-polypropylene-composites-filled-with-polydopamine-functionalized-hexagonal-boron-nitride
#2
Lin Chen, Hong-Fei Xu, Shao-Jian He, Yi-Hang Du, Nan-Jie Yu, Xiao-Ze Du, Jun Lin, Sergei Nazarenko
Mussel-inspired approach was attempted to non-covalently functionalize the surfaces of boron nitride (BN) with self-polymerized dopamine coatings in order to reduce the interfacial thermal barrier and enhance the thermal conductivity of BN-containing composites. Compared to the polypropylene (PP) composites filled with pristine BN at the same filler content, thermal conductivity was much higher for those filled with both functionalized BN (f-BN) and maleic anhydride grafted PP (PP-g-ma) due to the improved filler dispersion and better interfacial filler-matrix compatibility, which facilitated the development of more thermal paths...
2017: PloS One
https://www.readbyqxmd.com/read/28101593/diffuse-phalangeal-signal-abnormality-on-magnetic-resonance-imaging-phalangeal-microgeodic-disease
#3
Rupa Radhakrishnan, Kathleen H Emery, Arnold C Merrow
BACKGROUND: Phalangeal microgeodic disease is a rare and benign self-limited condition involving the phalanges, often in the setting of cold exposure, with characteristic MR imaging abnormalities. Radiographic case descriptions are predominantly from Asia and Europe, with only seven cases using MR to characterize phalangeal microgeodic disease. OBJECTIVE: In this study we describe the MR imaging appearance of unusual and striking phalangeal signal abnormality compatible with phalangeal microgeodic disease at our institution in North America...
January 18, 2017: Pediatric Radiology
https://www.readbyqxmd.com/read/28094942/simulation-of-dbs-dbs-cooh-and-dbs-conhnh2-as-hydrogelators
#4
Dafna Knani, David Alperstein
The organic gelator 1,3(R):2,4(S)-dibenzylidene-D-sorbitol (DBS) self-organizes to form a 3-D network at relatively low concentrations in a variety of nonpolar organic solvents and polymer melt. DBS could be transformed into a hydrogelator by introduction of hydrophilic groups, which facilitate its self-assembly in aqueous medium. In this work, we have investigated the hydrogelators DBS-COOH and DBS-CONHNH2 and the organogelator DBS by molecular modeling. We have used quantum mechanics (QM) to elucidate the preferred geometry of one molecule and a dimer of each of the gelators, and molecular dynamics (MD) to simulate the pure gelators and their mixtures with water...
January 17, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28093777/description-of-non-covalent-interactions-in-scc-dftb-methods
#5
Vijay Madhav Miriyala, Jan Řezáč
We have analyzed the description of non-covalent interactions in multiple variants of the self-consistent charges density functional tight binding (SCC-DFTB) method. While the description of London dispersion can be easily improved by empirical correction, hydrogen bonding poses a much more difficult problem. We have implemented an interaction energy decomposition scheme that allowed us to quantify the error at the level of first-order electrostatic and polarization terms. Both are underestimated because of the monopole approximation used in SCC-DFTB, with the latter being affected also by the use of minimal basis set...
January 17, 2017: Journal of Computational Chemistry
https://www.readbyqxmd.com/read/28092259/-first-case-of-chikungunya-fever-in-hermosillo-sonora-mexico
#6
Miguel Ángel Martínez-Medina, Ismael Antonio Cañedo-Dorame
The Chikungunya is an arbovirus first described during a 1952 outbreak of febrile exantematic disease in southern Tanganyika (now Tanzania). It is a virus within the alphavirus genus of the Togaviridae family, it is usually transmitted to humans by Aedes mosquitoes. Typically, the disease manifests as acute onset of fever and joint pains. This study describes the clinical characteristics the first imported case infected with chikungunya fever (CHIK) in Hermosillo, Sonora, Mexico. We report the case of a 30 years old man seen in our emergency department due to fever, polyarthralgia, rash and headache...
January 2017: Revista Médica del Instituto Mexicano del Seguro Social
https://www.readbyqxmd.com/read/28077830/-path-analysis-of-the-influence-of-hospital-ethical-climate-perceived-by-nurses-on-supervisor-trust-and-organizational-effectiveness
#7
Yoon Goo Noh, Myun Sook Jung
PURPOSE: The purpose of this study was to analyze the paths of influence that a hospital's ethical climate exerts on nurses' organizational commitment and organizational citizenship behavior, with supervisor trust as the mediating factor, and verify compatibility of the models in hospital nurses. METHODS: The sample consisted of 374 nurses recruited from four hospitals in 3 cities in Korea. The measurements included the Ethical Climate Questionnaire, Supervisor Trust Questionnaire, Organizational Commitment Questionnaire and Organizational Citizenship Behavior Questionnaire...
December 2016: Journal of Korean Academy of Nursing
https://www.readbyqxmd.com/read/28075480/costs-of-selfing-prevent-the-spread-of-a-self-compatibility-mutation-that-causes-reproductive-assurance
#8
Nathan C Layman, M Thilina R Fernando, Christopher R Herlihy, Jeremiah W Busch
In flowering plants, shifts from outcrossing to partial or complete self-fertilization have occurred independently thousands of times, yet the underlying adaptive processes are difficult to discern. Selfing's ability to provide reproductive assurance when pollination is uncertain is an oft-cited ecological explanation for its evolution, but this benefit may be outweighed by genetic costs diminishing its selective advantage over outcrossing. We directly studied the fitness effects of a self-compatibility (SC) mutation that was backcrossed into a self-incompatible (SI) population of Leavenworthia alabamica, illuminating the direction and magnitude of selection on the mating-system modifier...
January 11, 2017: Evolution; International Journal of Organic Evolution
https://www.readbyqxmd.com/read/28073339/dermal-safety-assessment-of-arm-hammer-laundry-products-formulated-for-sensitive-skin
#9
Douglas M Frederick, Linda Vorwerk, Archana Gupta, Annahita Ghassemi
CONTEXT: The prevalence of sensitive skin among the general population in industrialized countries is reported to be over 50%. Sensitive skin subjects often report significant reactions to contact with cosmetics, soaps and other consumer products. OBJECTIVE: This paper describes the overall skin compatibility and mildness program for a newly developed, lightly fragranced, colorant free laundry product (i.e. Arm & Hammer™ Sensitive Skin plus Skin-Friendly Fresh Scent), specially formulated for individuals with sensitive skin...
January 11, 2017: Cutaneous and Ocular Toxicology
https://www.readbyqxmd.com/read/28073063/self-assembled-micelles-based-on-chondroitin-sulfate-poly-d-l-lactideco-glycolide-block-copolymers-for-doxorubicin-delivery
#10
Hui Zhang, Jiangkang Xu, Liang Xing, Jianbo Ji, Aihua Yu, Guangxi Zhai
Doxorubicin (DOX) is one of the most common chemotherapeutic agents for the treatment of various cancers, but its clinical usage is limited by dose-dependent cardiotoxicity. We have recently synthesized a series of Chondroitin sulfate/poly (d,l-lactideco-glycolide) block copolymers (Chs-b-PLGA) with different length of hydrophobic block by an end-to-end coupling strategy. The structure of the amphiphilic block copolymers with low critical micelle concentration (∼28mg/L) were confirmed by (1)H NMR. The copolymers could self-assemble into stable micelles in aqueous environment with homogeneous size distribution and negative zeta potential...
December 23, 2016: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28073028/multiplexed-detection-of-lung-cancer-biomarkers-in-patients-serum-with-cmos-compatible-silicon-nanowire-arrays
#11
Anran Gao, Xun Yang, Jing Tong, Lin Zhou, Yuelin Wang, Jianlong Zhao, Hongju Mao, Tie Li
In this work, a real-time assay for highly sensitive, label-free, multiplexed electrical detection of lung cancer biomarkers was developed by using silicon nanowire field-effect (SiNW-FET) devices. Highly responsive SiNW arrays were fabricated using a CMOS-compatible anisotropic self-stop etching technique with mass reproducibility and low cost character. The SiNW nanosensor was integrated with PDMS microfluidic device, which allows rapid analyte delivery, makes the analysis to be conducted using exceedingly small samples and enables potential multiplexed detection...
January 3, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28069108/adsorption-of-poly-ethylene-oxide-containing-amphiphilic-polymers-on-solid-liquid-interfaces-fundamentals-and-applications
#12
Andrew M Bodratti, Biswajit Sarkar, Paschalis Alexandridis
The adsorption of amphiphilic molecules of varying size on solid-liquid interfaces modulates the properties of colloidal systems. Nonionic, poly(ethylene oxide) (PEO)-based amphiphilic molecules are particularly useful because of their graded hydrophobic-hydrophilic nature, which allows for adsorption on a wide array of solid surfaces. Their adsorption also results in other useful properties, such as responsiveness to external stimuli and solubilization of hydrophobic compounds. This review focuses on the adsorption properties of PEO-based amphiphiles, beginning with a discussion of fundamental concepts pertaining to the adsorption of macromolecules on solid-liquid interfaces, and more specifically the adsorption of PEO homopolymers...
September 28, 2016: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28068769/high-resolution-coarse-grained-model-of-hydrated-anion-exchange-membranes-that-accounts-for-hydrophobic-and-ionic-interactions-through-short-ranged-potentials
#13
Jibao Lu, Liam C Jacobson, Yamila A Perez Sirkin, Valeria Molinero
Molecular simulations provide a versatile tool to study the structure, anion conductivity, and stability of anion-exchange membrane (AEM) materials and can provide a fundamental understanding of the relation between structure and property of membranes that is key for their use in fuel cells and other applications. The quest for large spatial and temporal scales required to model the multiscale structure and transport processes in the polymer electrolyte membranes, however, cannot be met with fully atomistic models, and the available coarse-grained (CG) models suffer from several challenges associated with their low-resolution...
January 10, 2017: Journal of Chemical Theory and Computation
https://www.readbyqxmd.com/read/28064557/compact-self-grounded-bow-tie-antenna-design-for-an-uwb-phased-array-hyperthermia-applicator
#14
Pegah Takook, Mikael Persson, Johanna Gellermann, Hana Dobšíček Trefná
Using UWB hyperthermia systems has the potential to improve the heat delivery to deep seated tumours. In this paper, we present a novel self-grounded Bow-Tie antenna design which is to serve as the basis element in a phased-array applicator. The UWB operation in the frequency range of 0.43-1 GHz is achieved by immersing the antenna in a water bolus. The radiation characteristics are improved by appropriate shaping the water bolus and by inclusion of dielectric layers on the top of the radiating arms of the antenna...
January 8, 2017: International Journal of Hyperthermia
https://www.readbyqxmd.com/read/28062510/plasticity-of-floral-longevity-and-floral-display-in-the-self-compatible-biennial-sabatia-angularis-gentianaceae-untangling-the-role-of-multiple-components-of-pollination
#15
Rachel B Spigler
BACKGROUND AND AIMS: Plasticity of floral traits in response to pollination can enable plants to maximize opportunities for pollen import and export under poor pollination conditions, while minimizing costs under favourable ones. Both floral longevity and display are key traits influencing pollination. While pollination-induced flower wilting is widely documented, we lack an understanding of the multifactorial complexity of this response, including the influence of other pollination components, costs of extended longevity and subsequent impacts on floral display...
January 2017: Annals of Botany
https://www.readbyqxmd.com/read/28058434/oil-in-water-microfluidics-on-the-colloidal-scale-new-routes-to-self-assembly-and-glassy-packings
#16
Max Meissner, Jun Dong, Jens Eggers, Annela M Seddon, C Patrick Royall
We have developed norland optical adhesive (NOA) flow focusing devices, making use of the excellent solvent compatibility and surface properties of NOA to generate micron scale oil-in-water emulsions with polydispersities as low as 5%. While current work on microfluidic oil-in-water emulsification largely concerns the production of droplets with sizes on the order of 10s of micrometres, large enough that Brownian motion is negligible, our NOA devices can produce droplets with radii ranging from 2 μm to 12 μm...
January 6, 2017: Soft Matter
https://www.readbyqxmd.com/read/28056928/new-ligation-independent-cloning-vectors-for-expression-of-recombinant-proteins-with-a-self-cleaving-cpd-6xhis-tag
#17
Marco Biancucci, Jazel S Dolores, Jennifer Wong, Sarah Grimshaw, Wayne F Anderson, Karla J F Satchell, Keehwan Kwon
BACKGROUND: Recombinant protein purification is a crucial step for biochemistry and structural biology fields. Rapid robust purification methods utilize various peptide or protein tags fused to the target protein for affinity purification using corresponding matrices and to enhance solubility. However, affinity/solubility-tags often need to be removed in order to conduct functional and structural studies, adding complexities to purification protocols. RESULTS: In this work, the Vibrio cholerae MARTX toxin Cysteine Protease Domain (CPD) was inserted in a ligation-independent cloning (LIC) vector to create a C-terminal 6xHis-tagged inducible autoprocessing enzyme tag, called "the CPD-tag"...
January 5, 2017: BMC Biotechnology
https://www.readbyqxmd.com/read/28049346/genoproteomics-assisted-improvement-of-andrographis-paniculata-toward-a-promising-molecular-and-conventional-breeding-platform-for-autogamous-plants-affecting-the-pharmaceutical-industry
#18
Alireza Valdiani, Daryush Talei, Surrinder K Lattoo, Rodomiro Ortiz, Søren Kjærsgaard Rasmussen, Jacqueline Batley, Mohd Yusop Rafii, Mahmood Maziah, Kallevettankuzhy K Sabu, Rambod Abiri, Suchirat Sakuanrungsirikul, Soon Guan Tan
Andrographis paniculata (Burm. f.) Wall. ex Nees. (AP) is a hermaphroditic, self-compatible, and habitual inbreeding plant. Its main bioactive component is andrographolide, which is capable of inducing autophagic cell death in some human cancer cells and helps fight HIV/AIDS. Increasing the andrographolide content by investigating the genetic mechanisms controlling its biosynthesis in order to improve and develop high-yielding cultivars are the main breeding targets for AP. However, there might exist some limitations or barriers for crossability within AP accessions...
January 3, 2017: Critical Reviews in Biotechnology
https://www.readbyqxmd.com/read/28047598/su-f-j-158-respiratory-motion-resolved-self-gated-4d-mri-using-rotating-cartesian-k-space-sampling
#19
F Han, Z Zhou, Y Yang, K Sheng, P Hu
PURPOSE: Dynamic MRI has been used to quantify respiratory motion of abdominal organs in radiation treatment planning. Many existing 4D-MRI methods based on 2D acquisitions suffer from limited slice resolution and additional stitching artifacts when evaluated in 3D(1) . To address these issues, we developed a 4D-MRI (3D dynamic) technique with true 3D k-space encoding and respiratory motion self-gating. METHODS: The 3D k-space was acquired using a Rotating Cartesian K-space (ROCK) pattern, where the Cartesian grid was reordered in a quasi-spiral fashion with each spiral arm rotated using golden angle(2) ...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28040447/demographics-phenotypic-health-characteristics-and-genetic-analysis-of-centenarians-in-china
#20
REVIEW
Yi Zeng, Qiushi Feng, Danan Gu, James W Vaupel
After a brief introduction to the background, significance and unique features of the centenarian population in China, we describe the Chinese Longitudinal Healthy Longevity Study (CLHLS), which is the world's largest study of centenarians, nonagenarians, octogenarians, and compatible young-old aged 65-79. Based on the CLHLS data and other relevant studies, we summarize demographic and socioeconomic characteristics as well as self-reported and objectively-tested health indicators of centenarians in China, with an emphasis on gender differences and rural/urban disparities...
December 28, 2016: Mechanisms of Ageing and Development
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