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https://www.readbyqxmd.com/read/28210958/does-global-astrocytic-calcium-signaling-participate-in-awake-brain-state-transitions-and-neuronal-circuit-function
#1
Celia Kjaerby, Rune Rasmussen, Mie Andersen, Maiken Nedergaard
We continuously need to adapt to changing conditions within our surrounding environment, and our brain needs to quickly shift between resting and working activity states in order to allow appropriate behaviors. These global state shifts are intimately linked to the brain-wide release of the neuromodulators, noradrenaline and acetylcholine. Astrocytes have emerged as a new player participating in the regulation of brain activity, and have recently been implicated in brain state shifts. Astrocytes display global Ca(2+) signaling in response to activation of the noradrenergic system, but whether astrocytic Ca(2+) signaling is causative or correlative for shifts in brain state and neural activity patterns is not known...
February 16, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/28208303/a-photothermal-spectrometer-for-fast-and-background-free-detection-of-individual-nanoparticles-in-flow
#2
Richard Maceiczyk, Hisashi Shimizu, David Müller, Takehiko Kitamori, Andrew deMello
Sensitive detection and quantification of individual plasmonic nanoparticles is critical in a range of applications in the biological, nanomaterials, and analytical sciences. Although a wide range of techniques can be applied to the analysis of immobilized particles, high-throughput analysis of nanoscale species in flow is surprisingly underdeveloped. To address this shortcoming, we present an ultrasensitive, background-free technique based on the photothermal effect and termed differential detection photothermal interferometry (DDPI)...
February 7, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28207296/gambit-a-parameterless-model-based-evolutionary-algorithm-for-mixed-integer-problems
#3
Krzysztof L Sadowski, Dirk Thierens, Peter A N Bosman
Learning and exploiting problem structure is one of the key challenges in optimization. This is especially important for black-box optimization (BBO) where prior structural knowledge of a problem is not available. Existing model-based Evolutionary Algorithms (EAs) are very efficient at learning structure in both the discrete, and in the continuous domain. In this paper, discrete and continuous model-building mechanisms are integrated for the Mixed-Integer (MI) domain, comprising discrete and continuous variables...
February 16, 2017: Evolutionary Computation
https://www.readbyqxmd.com/read/28205538/complement-component-5-promotes-lethal-thrombosis
#4
Tomohiro Mizuno, Kengo Yoshioka, Masashi Mizuno, Mie Shimizu, Fumihiko Nagano, Tomoyuki Okuda, Naotake Tsuboi, Shoichi Maruyama, Tadashi Nagamatsu, Masaki Imai
Extracellular histones promote platelet aggregation and thrombosis; this is followed by induction of coagulation disorder, which results in exhaustion of coagulation factors. Complement component 5 (C5) is known to be associated with platelet aggregation and coagulation system activation. To date, the pathological mechanism underlying liver injury has remained unclear. Here, we investigated whether C5 promotes liver injury associated with histone-induced lethal thrombosis. C5-sufficient and C5-deficient mice received single tail vein injections of purified, unfractionated histones obtained from calf thymus (45-75 μg/g)...
February 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28203565/tubular-dysfunction-mimicking-dent-s-disease-in-2-infants-born-with-extremely-low-birth-weight
#5
Midori Awazu, Mie Arai, Shoko Ohashi, Hirotaka Takahashi, Takashi Sekine, Kazushige Ikeda
Two preterm infants, with extremely low birth weight born at gestational weeks 24 and 25, showed generalized proximal tubular dysfunction during their stay in the neonatal intensive care unit, including glucosuria, low molecular weight proteinuria, phosphaturia, uricosuria, enzymuria (elevated urine N-acetyl-β-D-glucosaminidase), panaminoaciduria, and hypercalciuria, associated with renal calcification. Renal tubular acidosis was not present in either patient. DNA mutation analysis for Dent's disease, performed in patient 1, was negative...
January 2017: Case Reports in Nephrology and Dialysis
https://www.readbyqxmd.com/read/28202899/large-area-and-broadband-ultra-black-absorber-using-microstructured-aluminum-doped-silicon-films
#6
Zhen Liu, Hai Liu, Xiaoyi Wang, Haigui Yang, Jinsong Gao
A large area and broadband ultra-black absorber based on microstructured aluminum (Al) doped silicon (Si) films prepared by a low-cost but very effective approach is presented. The average absorption of the absorber is greater than 99% within the wide range from 350 nm to 2000 nm, and its size reaches to 6 inches. We investigate the fabrication mechanism of the absorber and find that the Al atom doped in silicon improves the formation of the nanocone-like microstructures on the film surface, resulting in a significant decrease in the reflection of incident light...
February 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28198841/optical-neutrality-invisibility-without-cloaking
#7
Reed Hodges, Cleon Dean, Maxim Durach
We show that it is possible to design an invisible wavelength-sized metal-dielectric metamaterial object without evoking cloaking. Our approach is an extension of the neutral inclusion concept by Zhou and Hu [Phys. Rev. E74, 026607 (2006)PLEEE81063-651X10.1103/PhysRevE.74.026607] to Mie scatterers. We demonstrate that an increase of metal fraction in the metamaterial leads to a transition from dielectric-like to metal-like scattering, which proceeds through invisibility or optical neutrality of the scatterer...
February 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/28196385/-comparison-of-different-mechanical-insufflator-exsufflator-systems-by-measurement-of-the-peak-exspiratory-flow-pef
#8
Ansgar Schütz, Janine Wagner, Anne Conrad, Andreas Funke
Background The management of pulmonary secretion in patients with respiratory muscle weakness using mechanical insufflator-exsufflator systems (MIE) is an established treatment option. There are significant differences in the efficiency of different devices in practical use. The intention of this study was to evaluate the peak exspiratory flow (PEF) values of different devices with and without use of equipment. Methods PEFs of ten MIE were investigated in vitro using different equipment. Results The efficiency of the devices showed significant differences...
February 14, 2017: Pneumologie
https://www.readbyqxmd.com/read/28195194/in-situ-study-of-nucleation-and-aggregation-phases-for-nanoparticles-grown-by-laser-driven-methods
#9
M Barberio, P Antici
In the last decades, nanomaterials and nanotechnologies have become fundamental and irreplaceable in many fields of science and technology. When used in applications, their properties depend on many factors such as size, shape, internal structure and composition. For this, exact knowledge of their structural features is essential when developing fabrication technologies and searching for new types of nanostructures or nanoparticles with specific properties. For the latter, the knowledge of the precise temporal evolution of the growth processes is fundamental when it comes to industrial production and applications...
February 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28187044/minimally-invasive-versus-open-esophageal-resection-three-year-follow-up-of-the-previously-reported-randomized-controlled-trial-the-time-trial
#10
Jennifer Straatman, Nicole van der Wielen, Miguel A Cuesta, Freek Daams, Josep Roig Garcia, Luigi Bonavina, Camiel Rosman, Mark I van Berge Henegouwen, Suzanne S Gisbertz, Donald L van der Peet
OBJECTIVE: The aim of this study was to investigate 3-year survival following a randomized controlled trial comparing minimally invasive with open esophagectomy in patients with esophageal cancer. BACKGROUND: Research on minimally invasive esophagectomy (MIE) has shown faster postoperative recovery and a marked decrease in pulmonary complications. Debate is ongoing as to whether the procedure is equivalent to open resection regarding oncologic outcomes. The study is a follow-up study of the TIME-trial (traditional invasive vs minimally invasive esophagectomy, a multicenter, randomized trial)...
February 9, 2017: Annals of Surgery
https://www.readbyqxmd.com/read/28182624/socio-demographic-characteristics-of-danish-blood-donors
#11
Kristoffer Sølvsten Burgdorf, Jacob Simonsen, Anna Sundby, Klaus Rostgaard, Ole Birger Pedersen, Erik Sørensen, Kaspar René Nielsen, Mie Topholm Bruun, Morten Frisch, Gustaf Edgren, Christian Erikstrup, Henrik Hjalgrim, Henrik Ullum
BACKGROUND: Blood transfusion is an essential component of a modern healthcare system. Because knowledge about blood donor demography may inform the design of strategies for donor recruitment and retention, we used nationwide registers to characterize the entire population of blood donors in Denmark in 2010. METHODS: The study population comprised all Danes in the age range eligible for blood donation (N = 3,236,753) at the end of 2010. From the Scandinavian Donations and Transfusions (SCANDAT) register, we identified 174,523 persons who donated blood in Danish blood banks at least once in 2010...
2017: PloS One
https://www.readbyqxmd.com/read/28180230/semiflexible-polymers-confined-in-a-slit-pore-with-attractive-walls-two-dimensional-liquid-crystalline-order-versus-capillary-nematization
#12
Andrey Milchev, Sergei A Egorov, Kurt Binder
Semiflexible polymers under good solvent conditions interacting with attractive planar surfaces are investigated by Molecular Dynamics (MD) simulations and classical Density Functional Theory (DFT). A bead-spring type potential complemented by a bending potential is used, allowing variation of chain stiffness from completely flexible coils to rod-like polymers whose persistence length by far exceeds their contour length. Solvent is only implicitly included, monomer-monomer interactions being purely repulsive, while two types of attractive wall-monomer interactions are considered: (i) a strongly attractive Mie-type potential, appropriate for a strictly structureless wall, and (ii) a corrugated wall formed by Lennard-Jones particles arranged on a square lattice...
February 9, 2017: Soft Matter
https://www.readbyqxmd.com/read/28179132/gefitinib-gefitinib-microspheres-loaded-polyurethane-constructs-as-drug-eluting-stent-coating
#13
Weiluan Chen, Johanna Clauser, Anja Lena Thiebes, Donnacha J McGrath, Nicola Kelly, Mies J van Steenbergen, Stefan Jockenhoevel, Ulrich Steinseifer, Peter E McHugh, Wim E Hennink, Robbert J Kok
One of the complications of bronchotracheal cancer is obstruction of the upper airways. Local tumor resection in combination with an airway stent can suppress intraluminal tumor (re)growth. We have investigated a novel drug-eluting stent coating for local release of the anticancer drug gefitinib. A polyurethane (PU) sandwich construct was prepared by a spray coating method in which gefitinib was embedded between a PU support layer of 200μm and a PU top layer of 50-200μm. Gefitinib was either embedded in the construct as small crystals or as gefitinib-loaded poly(lactic-co-glycolic acid) (PLGA) microspheres (MSP)...
February 4, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28176764/foxn1-%C3%AE-5t-transcriptional-axis-controls-cd8-t-cell-production-in-the-thymus
#14
Muhammad Myn Uddin, Izumi Ohigashi, Ryo Motosugi, Tomomi Nakayama, Mie Sakata, Jun Hamazaki, Yasumasa Nishito, Immanuel Rode, Keiji Tanaka, Tatsuya Takemoto, Shigeo Murata, Yousuke Takahama
The thymus is an organ that produces functionally competent T cells that protect us from pathogens and malignancies. Foxn1 is a transcription factor that is essential for thymus organogenesis; however, the direct target for Foxn1 to actuate thymic T-cell production is unknown. Here we show that a Foxn1-binding cis-regulatory element promotes the transcription of β5t, which has an essential role in cortical thymic epithelial cells to induce positive selection of functionally competent CD8(+) T cells. A point mutation in this genome element results in a defect in β5t expression and CD8(+) T-cell production in mice...
February 8, 2017: Nature Communications
https://www.readbyqxmd.com/read/28169378/fully-alloyed-metal-nanorods-with-highly-tunable-properties
#15
Wiebke Albrecht, Jessi E S van der Hoeven, Tian-Song Deng, Petra E de Jongh, Alfons van Blaaderen
Alloyed metal nanorods offer a unique combination of enhanced plasmonic and photothermal properties with a wide variety in optical and catalytic properties as a function of the alloy composition. Here, we show that fully alloyed anisotropic nanoparticles can be obtained with complete retention of the particle shape via thermal treatment at surprisingly low temperatures. By coating Au-Ag, Au-Pd and Au-Pt core-shell nanorods with a protective mesoporous silica shell the transformation of the rods to a more stable spherical shape was successfully prevented during alloying...
February 7, 2017: Nanoscale
https://www.readbyqxmd.com/read/28163596/rad-seq-analysis-of-typical-and-minor-citrus-accessions-including-bhutanese-varieties
#16
Tshering Penjor, Takashi Mimura, Nobuhiro Kotoda, Ryoji Matsumoto, Atsushi J Nagano, Mie N Honjo, Hiroshi Kudoh, Masashi Yamamoto, Yukio Nagano
We analyzed the reduced-representation genome sequences of Citrus species by double-digest restriction site-associated DNA sequencing (ddRAD-Seq) using 44 accessions, including typical and minor accessions, such as Bhutanese varieties. The results of this analysis using typical accessions were consistent with previous reports that citron, papeda, pummelo, and mandarin are ancestral species, and that most Citrus species are derivatives or hybrids of these four species. Citrus varieties often reproduce asexually and heterozygosity is highly conserved within each variety...
December 2016: Breeding Science
https://www.readbyqxmd.com/read/28163586/evaluation-of-the-yield-of-abiotic-stress-tolerant-atdreb1a-transgenic-potato-under-saline-conditions-in-advance-of-field-trials
#17
Takayoshi Shimazaki, Tsukasa Endo, Mie Kasuga, Kazuko Yamaguchi-Shinozaki, Kazuo N Watanabe, Akira Kikuchi
Cultivated potato is a drought-, salinity-, and frost-sensitive species. The transgenic approach is one of the methods used to mitigate abiotic stress. The utility of transgenic potatoes that have abiotic stress tolerance should be judged from their yield under stress conditions. In order to establish transgenic potato lines with the AtDREB1A gene that could be used in practical applications, we screened candidate lines in a growth room with growth profiles under non-stress conditions rather than the expression level of transgene...
December 2016: Breeding Science
https://www.readbyqxmd.com/read/28158129/concentration-dependent-correlated-scattering-properties-of-intralipid-20-dilutions
#18
Michael Raju, Sujatha Narayanan Unni
Dilutions of Intralipid 20% are widely used as optical phantoms for mimicking scattering properties of turbid media such as tissues. One of the frequently used methodologies for quantifying the scattering coefficient and anisotropy of Intralipid 20% is the use of single-particle Mie scattering theory, which in fact is not valid for nontenuous media. Hence, two methodologies consisting of analytical wave theory and effective medium theory, incorporating particle size distribution and concentration-dependent correlated scattering phenomena, are used to estimate the effective scattering coefficient and anisotropy of Intralipid 20% dilutions (1%-100% v/v) from 380 to 1000 nm...
February 1, 2017: Applied Optics
https://www.readbyqxmd.com/read/28158028/light-scattering-computation-model-for-nonspherical-aerosol-particles-based-on-multi-resolution-time-domain-scheme-model-development-and-validation
#19
Shuai Hu, Taichang Gao, Hao Li, Bo Yang, Feng Zhang, Ming Chen, Lei Liu
Due to the inadequate understanding of the scattering properties of nonspherical aerosols, considerable uncertainties still exist in the radiative transfer numerical simulation. To this end, a new scattering model for nonspherical aerosols is established based on Multi-Resolution Time-Domain (MRTD) scheme. The model is comprised of three modules: near field calculation module, near-to-far transformation module and scattering parameters computation module, in which, the near electromagnetic field is calculated by MRTD technique, the near-to-far transformation scheme is performed by volume integral method, and the calculation models for extinction and absorption cross section are directly derived from Maxwell's curl equations in the frequency domain...
January 23, 2017: Optics Express
https://www.readbyqxmd.com/read/28157859/measurement-of-back-scattering-patterns-from-single-laser-trapped-aerosol-particles-in-air
#20
Yong-Le Pan, Chuji Wang, Leonid A Beresnev, Alex J Yuffa, Gorden Videen, David Ligon, Joshua L Santarpia
We demonstrate a method for measuring elastic back-scattering patterns from single laser trapped micron-sized particles, spanning the scattering angle range of θ=167.7°-180° and φ=0°-360° in spherical coordinates. We calibrated the apparatus by capturing light-scattering patterns of 10 μm diameter borosilicate glass microspheres and comparing their scattered intensities with Lorenz-Mie theory. Back-scattering patterns are also presented from a single trapped Johnson grass spore, two attached Johnson grass spores, and a cluster of Johnson grass spores...
January 20, 2017: Applied Optics
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