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https://www.readbyqxmd.com/read/29345026/male-male-aggression-is-unlikely-to-stabilize-a-poison-frog-polymorphism
#1
Yusan Yang, Matthew B Dugas, Houston J Sudekum, Sean Murphy, Corinne L Richards-Zawacki
Phenotypic polymorphism is common in animals, and the maintenance of multiple phenotypes in a population requires forces that act against homogenizing drift and selection. Male-male competition can contribute to the stability of a polymorphism when males compete primarily with males of the same phenotype. In and around a contact zone between red and blue lineages of the poison frog Oophaga pumilio, we used simulated territorial intrusions to test the non-exclusive predictions that males would direct more aggression toward males of (i) their own phenotype and/or (ii) the phenotype that is most common in their population...
January 18, 2018: Journal of Evolutionary Biology
https://www.readbyqxmd.com/read/29337579/unveiling-the-shape-evolution-and-halide-ion-segregation-in-blue-emitting-formamidinium-lead-halide-perovskite-nanocrystals-using-an-automated-microfluidic-platform
#2
Ioannis Lignos, Loredana Protesescu, Dilara Börte Emiroglu, Richard M Maceiczyk, Simon Schneider, Maksym V Kovalenko, Andrew J deMello
Hybrid organic-inorganic perovskites and in particular formamidinium lead halide (FAPbX3, X = Cl, Br, I) perovskite nanocrystals (NCs) have shown great promise for their implementation in optoelectronic devices. Specifically, the Br and I counterparts have shown unprecedented photoluminescence properties, including precise wavelength tuning (530-790 nm), narrow emission linewidths ( less than 100 meV) and high photoluminescence quantum yields (70-90%). However, the controlled formation of blue emitting FAPb(Cl1-xBrx)3 NCs lags behind their green and red counterparts and the mechanism of their formation remains unclear...
January 16, 2018: Nano Letters
https://www.readbyqxmd.com/read/29328140/full-color-digitized-holography-for-large-scale-holographic-3d-imaging-of-physical-and-nonphysical-objects
#3
Kyoji Matsushima, Noriaki Sonobe
Digitized holography techniques are used to reconstruct three-dimensional (3D) images of physical objects using large-scale computer-generated holograms (CGHs). The object field is captured at three wavelengths over a wide area at high densities. Synthetic aperture techniques using single sensors are used for image capture in phase-shifting digital holography. The captured object field is incorporated into a virtual 3D scene that includes nonphysical objects, e.g., polygon-meshed CG models. The synthetic object field is optically reconstructed as a large-scale full-color CGH using red-green-blue color filters...
January 1, 2018: Applied Optics
https://www.readbyqxmd.com/read/29321463/use-of-a-smartphone-as-a-colorimetric-analyzer-in-paper-based-devices-for-sensitive-and-selective-determination-of-mercury-in-water-samples
#4
Purim Jarujamrus, Rattapol Meelapsom, Somkid Pencharee, Apinya Obma, Maliwan Amatatongchai, Nadh Ditcharoen, Sanoe Chairam, Suparb Tamuang
A smartphone application, called CAnal, was developed as a colorimetric analyzer in paper-based devices for sensitive and selective determination of mercury(II) in water samples. Measurement on the double layer of a microfluidic paper-based analytical device (μPAD) fabricated by alkyl ketene dimer (AKD)-inkjet printing technique with special design doped with unmodified silver nanoparticles (AgNPs) onto the detection zones was performed by monitoring the gray intensity in the blue channel of AgNPs, which disintegrated when exposed to mercury(II) on μPAD...
2018: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/29321462/microfluidic-paper-based-analytical-device-for-the-determination-of-hexavalent-chromium-by-photolithographic-fabrication-using-a-photomask-printed-with-3d-printer
#5
Hitoshi Asano, Yukihide Shiraishi
This article describes a simple and inexpensive microfluidic paper-based analytical device (μPAD) for the determination of hexavalent chromium (CrVI) in water samples. The μPADs were fabricated on paper by photolithography using a photomask printed with a 3D printer and functionalized with reagents for a colorimetric assay. In the μPAD, CrVI reacts with 1,5-diphenylcarbazide to form a violet-colored complex. Images of μPADs were captured with a digital camera; then the red, green, and blue color intensity of each detection zone were measured using images processing software...
2018: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/29301304/the-development-evaluation-of-economic-zones-in-china
#6
Wei Liu, Hong-Bo Shi, Zhe Zhang, Sang-Bing Tsai, Yuming Zhai, Quan Chen, Jiangtao Wang
After the Chinese reform and opening up, the construction of economic zones, such as Special Economic Zones, Hi-tech Zones and Bonded Zones, has played an irreplaceable role in China's economic development. Currently, against the background of Chinese economic transition, research on development evaluation of economic zones has become popular and necessary. Similar research usually focuses on one specific field, and the methods that are used to evaluate it are simple. This research aims to analyse the development evaluation of zones by synthesis...
January 2, 2018: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29279398/hybrid-speciation-leads-to-novel-male-secondary-sexual-ornamentation-of-an-amazonian-bird
#7
Alfredo O Barrera-Guzmán, Alexandre Aleixo, Matthew D Shawkey, Jason T Weir
Hybrid speciation is rare in vertebrates, and reproductive isolation arising from hybridization is infrequently demonstrated. Here, we present evidence supporting a hybrid-speciation event involving the genetic admixture of the snow-capped (Lepidothrix nattereri) and opal-crowned (Lepidothrix iris) manakins of the Amazon basin, leading to the formation of the hybrid species, the golden-crowned manakin (Lepidothrix vilasboasi). We used a genome-wide SNP dataset together with analysis of admixture, population structure, and coalescent modeling to demonstrate that the golden-crowned manakin is genetically an admixture of these species and does not represent a hybrid zone but instead formed through ancient genetic admixture...
December 26, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29273744/pitavastatin-nanoparticle-engineered-endothelial-progenitor-cells-repair-injured-vessels
#8
Huanyun Liu, Pang Bao, Lufeng Li, Yuqing Wang, Chunxin Xu, Mengyang Deng, Jihang Zhang, Xiaohui Zhao
Endothelial progenitor cells (EPC) participate in vessel recovery and maintenance of normal endothelial function. Therefore, pitavastatin-nanoparticles (NPs)-engineered EPC may be effective in repairing injured vasculature. Pitavastatin-loaded poly(lactic-co-glycolic) acid (PLGA) NPs were obtained via ultrasonic emulsion solvent evaporation with PLGA as the carrier encapsulating pitavastatin. The effects and mechanism of pitavastatin-NPs on EPC proliferation in vitro were evaluated. Then, EPC that internalized pitavastatin-NPs were transplanted into rats after carotid artery injury...
December 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29259096/control-of-microtubule-dynamics-using-an-optogenetic-microtubule-plus-end-f-actin-cross-linker
#9
Rebecca C Adikes, Ryan A Hallett, Brian F Saway, Brian Kuhlman, Kevin C Slep
We developed a novel optogenetic tool, SxIP-improved light-inducible dimer (iLID), to facilitate the reversible recruitment of factors to microtubule (MT) plus ends in an end-binding protein-dependent manner using blue light. We show that SxIP-iLID can track MT plus ends and recruit tgRFP-SspB upon blue light activation. We used this system to investigate the effects of cross-linking MT plus ends and F-actin in Drosophila melanogaster S2 cells to gain insight into spectraplakin function and mechanism. We show that SxIP-iLID can be used to temporally recruit an F-actin binding domain to MT plus ends and cross-link the MT and F-actin networks...
December 19, 2017: Journal of Cell Biology
https://www.readbyqxmd.com/read/29221059/metallic-fresnel-zone-plate-implemented-on-an-optical-fiber-facet-for-super-variable-focusing-of-light
#10
Hyuntai Kim, Jinseob Kim, Haechan An, Yohan Lee, Gun-Yeal Lee, Jeongkyun Na, Kyoungyoon Park, Seungjong Lee, Seung-Yeol Lee, Byoungho Lee, Yoonchan Jeong
We propose and investigate a metallic Fresnel zone plate (FZP/MFZP) implemented on a silver-coated optical fiber facet for super-variable focusing of light, the focal point of which can be drastically relocated by varying the wavelength of the incident light. We numerically show that when its nominal focal length is set to 20 μm at 550 nm, its effective focal length can be tuned by ~13.7 μm for 300-nm change in the visible wavelength range. This tuning sensitivity is over 20 times higher than that of a conventional silica-based spherical lens...
November 27, 2017: Optics Express
https://www.readbyqxmd.com/read/29194787/photonic-crystal-phosphors-integrated-on-a-blue-led-chip-for-efficient-white-light-generation
#11
Jongho Lee, Kyungtaek Min, Yeonsang Park, Kyung-Sang Cho, Heonsu Jeon
Following the proof-of-concept experiment in the unit structure level, photonic crystal (PhC) phosphors-structurally engineered phosphor materials based on the nanophotonics principles-are integrated with a blue light-emitting diode (LED) chip to demonstrate a compact and efficient white light source. Red- or green-emitting CdSe-based colloidal quantum dots (CQDs) are coated on a Si3 N4 thin-film grating to fabricate PhC phosphors. The underlying PhC structure is designed such that the photonic band-edge modes at the zone center (k∣∣ = 0) are tuned to the energy of the blue excitation photons...
November 30, 2017: Advanced Materials
https://www.readbyqxmd.com/read/29172064/propofol-attenuates-myocardial-ischemia-reperfusion-injury-partly-through-inhibition-of-resident-cardiac-mast-cell-activation
#12
Xiaoqian Yu, Xiaotong Sun, Meng Zhao, Yonghao Hou, Jingxin Li, Jingui Yu, Yuedong Hou
Cardiac mast cell activation is involved in the process of myocardial ischemia reperfusion (I/R) injury and exacerbates myocardial infarction. Propofol, an anesthetic with antioxidant property, can reduce myocardial infarct size in I/R injury. The present study was designed to investigate whether propofol can attenuate myocardial I/R injury by inhibiting resident cardiac mast cell activation by a Langendorff model. Thirty rats were randomly assigned to 5 groups (n=6 per group): control group and four test groups (I/R, I/R+compound 48/80, I/R+propofol, I/R+compound 48/80+propofol)...
November 21, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/29141407/partial-solar-radiation-exclusion-with-color-shade-nets-reduce-the-degradation-of-organic-acids-and-flavonoids-of-grape-berry-vitis-vinifera-l
#13
Johan Martínez-Lüscher, Christopher Cody Lee Chen, Luca Brillante, Sahap Kaan Kurtural
The incidence of solar radiation on red-skinned grapes can promote the synthesis of flavonoid desirable for wine production, elevated temperature may impair their accumulation. We performed a shade cloth trial covering the fruit zone (from pepper-corn size to maturity) with four polyethylene 1-meter curtains with different optical properties (20% shading factor Pearl colored and 40% shading factor Aluminet, Blue and Black colored) and a Control with no cover. Cluster temperature was 3.7°C lower on the Southwest side in Black-40% clusters during the warmest part of the day compared to Control...
November 15, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29141247/connections-of-anterior-thalamic-visual-centers-in-the-leopard-frog-rana-pipiens
#14
Eric W Recktenwald, Elizabeth A Dudkin, Laura K Skorina, William M Saidel, Edward R Gruberg
The amphibian retina projects to two discrete regions of neuropil in the anterior thalamus: the neuropil of Bellonci and the corpus geniculatum. These retinorecipient areas are encompassed within a larger zone of surrounding neuropil we call the NCZ (for neuropil of Bellonci/corpus geniculatum zone). The NCZ is characterized electrophysiologically by a distinctive tonic oscillatory response to blue light; it appears to be a visual module involved in processing the stationary visual environment. Using horseradish peroxidase (HRP), we mapped the connections of the NCZ...
November 16, 2017: Brain, Behavior and Evolution
https://www.readbyqxmd.com/read/29137732/ultrasound-assisted-biosynthesis-of-cuo-nps-using-brown-alga-cystoseira-trinodis-characterization-photocatalytic-aop-dpph-scavenging-and-antibacterial-investigations
#15
Haidong Gu, Xiao Chen, Feng Chen, Xing Zhou, Zohreh Parsaee
This contribution reports the biosynthesis of CuO NPs via ultrasound method using the Cystoseira trinodis extracts as an eco friendly and time saving process. The characterization of cupric oxide NPs was performed using XRD, FE-SEM, EDX, TEM, AFM, photoluminescence, UV-Vis, Raman and FT-IR spectroscopy investigations. SEM images show the spherical structure with the average crystallite size 6nm to 7.8nm of CuO. XRD analysis approved the formation of pure monoclinic crystallite structures of CuO NPs. These observations were confirmed by TEM analysis...
March 2018: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/29122717/synthesis-and-characterization-of-methyl-pyrazolone-functionalized-magnetic-chitosan-composite-for-visible-light-photocatalytic-degradation-of-methylene-blue
#16
N A Abdelwahab, E M H Morsy
TiO2/Fe3O4, TiO2/Fe3O4/chitosan and Methylpyrazolone functionalized TiO2/Fe3O4/chitosan (MPyTMChi) were successfully prepared. The chemical structure of the prepared materials was confirmed by FT-IR spectra, XRD, SEM and TEM. BET surface area increased from 2.4 to 3.1m(2)/g, Eg decreased from 2.58 to 2.25eV and more quenching of PL emission spectra was observed upon functionalization of TMChi by MPy. Moreover, high Ti and oxygen percentages were detected by EDX. Magnetization value (Ms) reached 21 emu.g(-1) for MPyTMChi...
November 6, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29108586/exploiting-an-automated-microfluidic-hydrodynamic-sequential-injection-system-for-determination-of-phosphate
#17
Wanpen Khongpet, Somkid Pencharee, Chanida Puangpila, Supaporn Kradtap Hartwell, Somchai Lapanantnoppakhun, Jaroon Jakmunee
A microfluidic hydrodynamic sequential injection (μHSI) spectrophotometric system was designed and fabricated. The system was built by laser engraving a manifold pattern on an acrylic block and sealing with another flat acrylic plate to form a microfluidic channel platform. The platform was incorporated with small solenoid valves to obtain a portable setup for programmable control of the liquid flow into the channel according to the HSI principle. The system was demonstrated for the determination of phosphate using a molybdenum blue method...
January 15, 2018: Talanta
https://www.readbyqxmd.com/read/29108580/development-of-flow-systems-incorporating-membraneless-vaporization-units-and-flow-through-contactless-conductivity-detector-for-determination-of-dissolved-ammonium-and-sulfide-in-canal-water
#18
Waleed Alahmad, Thanakorn Pluangklang, Thitirat Mantim, Victor Cerdà, Prapin Wilairat, Nuanlaor Ratanawimarnwong, Duangjai Nacapricha
Use of membraneless vaporization (MBL-VP) unit with two cone-shaped reservoirs is presented for on-line separation and detection of non-volatile species. A flow system comprising two sets of MBL-VP units with a single in-house capacitively coupled contactless conductivity detector (C4D) was developed for dual determination of ammonium and sulfide ions. Using the continuous-flow section, two zones (280μL) of a sample, either mixed with sodium hydroxide (for ammonium) or hydrochloric acid (for sulfide), are separately delivered into the donor reservoir of the MBL-VP units...
January 15, 2018: Talanta
https://www.readbyqxmd.com/read/29105602/a-new-low-profile-visualized-intraluminal-support-lvis-device-lvis-blue-laboratory-comparison-between-old-and-new-lvis
#19
Joonho Chung, Yoshikazu Matsuda, Jessica Nelson, Kiffon Keigher, Demetrius K Lopes
Objectives The Low-profile Visualized Intraluminal Support (LVIS) device is a flexible intracranial stent. The first generation of this system had significant challenges in consistently providing good wall apposition and aneurysm neck coverage. A new modified LVIS, LVIS Blue (Blue), has been developed to address these issues. The purpose of this study is to report a laboratory comparison of wall apposition and aneurysm neck coverage between the original LVIS and Blue. Methods In bench-top experiments, we noted the visual appearance of the devices and evaluated changes in stent cell angles, neck coverage surface area (%), and stent cell crossing profile for microcatheters using a fusiform aneurysm model...
January 2018: Neurological Research
https://www.readbyqxmd.com/read/29097140/molecular-screening-of-blue-mussels-indicated-high-mid-summer-prevalence-of-human-genogroup-ii-noroviruses-including-the-pandemic-gii-4-2012-variants-in-uk-coastal-waters-during-2013
#20
Subhajit Biswas, Philippa Jackson, Rebecca Shannon, Katherine Dulwich, Soumi Sukla, Ronald A Dixon
This molecular study is the first report, to the best of our knowledge, on identification of norovirus, NoV GII.4 Sydney 2012 variants, from blue mussels collected from UK coastal waters. Blue mussels (three pooled samples from twelve mussels) collected during the 2013 summer months from UK coastal sites were screened by RT-PCR assays. PCR products of RdRP gene for noroviruses were purified, sequenced and subjected to phylogenetic analysis. All the samples tested positive for NoVs. Sequencing revealed that the NoV partial RdRP gene sequences from two pooled samples clustered with the pandemic "GII...
October 13, 2017: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
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