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https://www.readbyqxmd.com/read/29786720/a-strain-induced-subwavelength-structure-for-a-haze-free-and-highly-transparent-flexible-plastic-substrate
#1
Jae Yong Park, Juyoung Ham, Illhwan Lee, Jong-Lam Lee
This paper presents a method to produce subwavelength-scale (<250 nm) AgCl nanostructures on a flexible plastic film, which is indispensable for highly efficient flexible displays. Using Cl2 plasma treatment on an Ag-coated plastic film, AgCl nanostructures were produced through the reaction of Ag atoms with Cl radicals. During the reaction, the volume of AgCl expands, leading to drastically changed surface morphology from a two-dimensional (2D) flat Ag surface to a 3D subwavelength-scale AgCl nanostructure...
May 22, 2018: Nanoscale
https://www.readbyqxmd.com/read/29786576/the-histological-and-electron-microscopic-study-of-the-parotid-salivary-gland-in-dehydrated-rats-of-different-ages
#2
Denys P Biletskyy, Oleg A Ustiansky, Olena S Maksymova, Pavel A Moskalenko, Alexey A Tymoshenko, Anna S Degtyarenko, Viktoriia Yu Harbuzova, Yevhen I Dubovyk, Andrii P Voznyi, Gennadii F Tkach
OBJECTIVE: Introduction: Water-salt metabolism disorders is one of the main factor of salivary gland pathology development. The aim: To study the morphological structure of the parotid salivary gland of young, mature and old rats at micro- and ultrastructural levels under water deprivation. PATIENTS AND METHODS: Materials and methods: The experiment was carried out on thirty six laboratory male rats of different ages (young, mature and old). The rats of the control group received normal volume of drinking water...
2018: Wiadomości Lekarskie: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/29784372/fast-and-reliable-bia-amperometric-quantification-of-acetylcysteine-using-a-nanostructured-double-hydroxide-sensor
#3
Anabel Laza Correa, Josué M Gonçalves, Pamela O Rossini, Juliana S Bernardes, Carlos A Neves, Koiti Araki, Lucio Angnes
This study reports the preparation and characterization of nickel/lead hydroxide nanoparticles used to construct electrochemical sensors, which were investigated for amperometric quantification of N-acetylcysteine (NAC). The newly synthesised material presents good uniformity, with the lead (II) ions homogenously incorporated into the alpha nickel hydroxide crystal structure, confirmed by X-ray diffraction, transmission electron microscopy and X-ray photoelectron spectroscopy analyses. Films of nanoparticles (3 nm in size) were prepared on conductive fluorine-doped tin oxide-coated glass slides and used connected to a specially built batch injection analysis (BIA) cell with a capacity of only 4 mL and the electrode positioned in the bottom...
August 15, 2018: Talanta
https://www.readbyqxmd.com/read/29782059/testicular-histomorphometry-and-the-proliferative-and-apoptotic-activities-of-the-seminiferous-epithelium-in-syrian-hamster-during-spontaneous-recrudescence-after-exposure-to-short-photoperiod
#4
Jesús Martínez-Hernández, Vicente Seco-Rovira, Ester Beltrán-Frutos, Concepción Ferrer, Manuel Canteras, María Del Mar Sánchez-Huertas, Luis Miguel Pastor
Syrian hamsters are photoperiodic rodents in which reproduction, including testicular function, is stimulated by long photoperiod exposure and curtailed by exposure to a short photoperiod. The objectives of this study were to characterize the testis histomorphometrically and to determine the role of the proliferation and apoptosis phenomena in the recovery of the seminiferous epithelium during spontaneous recrudescence after exposure to short photoperiod. The study was performed using conventional light microscopy, proliferating cell nuclear antigen and terminal deoxynucleotidyl transferase (TdT)-mediated dUTP in situ nick end labelling staining, image analysis software, and transmission electron microscopy in three recrudescence groups: initial recrudescence (IR), advanced recrudescence (AR) and total recrudescence (TR)...
May 21, 2018: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/29774078/targeting-intracellular-mmps-efficiently-inhibits-tumor-metastasis-and-angiogenesis
#5
Yaqi Lv, Xiangmei Zhao, Lidan Zhu, Sijia Li, Qingqing Xiao, Wei He, Lifang Yin
Treatment for metastatic cancer is a great challenge throughout the world. Commonly, directed inhibition of extracellular matrix metalloproteinases (MMPs) secreted by cancer cells can reduce metastasis. Here, a novel nanoplatform (HPMC NPs) assembled from hyaluronic acid (HA)-paclitaxel (PTX) prodrug and marimastat (MATT)/β-casein (CN) complexes was established to cure a 4T1 metastatic cancer model via targeting CD44 and intracellular, rather than extracellular, MMPs. Methods: HPMC NPs were prepared by assembling the complexes and prodrug under ultrasonic treatment, which the interaction between them was evaluated by förster resonance energy transfer, circular dichroism and fluorescence spectra...
2018: Theranostics
https://www.readbyqxmd.com/read/29770094/travel-related-zika-virus-cases-in-canada-october-2015-june-2017
#6
J Tataryn, L Vrbova, M Drebot, H Wood, E Payne, S Connors, J Geduld, M German, K Khan, P A Buck
Background: Zika virus (ZIKV) is an emerging mosquito-borne disease that can cause severe birth defects if contracted congenitally. Since late 2015, there has been a large increase in the number of travel-related cases of Zika virus infection in Canada. Objective: The objective of this study was to describe the epidemiology of travel-related Zika cases in Canada from October 2015 to June 2017 and review them in the context of the international outbreak in the Americas...
January 4, 2018: Canada Communicable Disease Report, Relevé des Maladies Transmissibles Au Canada
https://www.readbyqxmd.com/read/29768823/carbon-wrapping-effect-on-sulfur-polyacrylonitrile-composite-cathode-materials-for-lithium-sulfur-batteries
#7
K Krishnaveni, R Subadevi, G Radhika, T Premkumar, M Raja, Wei-Ren Liu, M Sivakumar
A sulfur-Polyacrylonitrile (PAN)-acetylene black (AB) composite was synthesized via thermal treatment processes. The as-prepared ternary composite was characterized by expending transmission electron microscopy (TEM), X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) and electrochemical investigations. The improved electrochemical performance can be attributed to the formation of PAN layer, which can keep a tight contact between carbon and sulfur which leads to improve the conductivity. Moreover, the PAN can also act as a flexible cushion to accommodate volume changes of sulfur cathode as well as a barrier to trap soluble polysulfide intermediates during the charge-discharge process...
January 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29767996/nanoscale-probing-of-local-hydrogen-heterogeneity-in-disordered-carbon-nitrides-with-vibrational-electron-energy-loss-spectroscopy
#8
Diane M Haiber, Peter A Crozier
In graphitic carbon nitrides, (photo)catalytic functionality is underpinned by the effect that residual hydrogen content, manifesting in amine (N-Hx ) defects, has on its optoelectronic properties. Therefore, a detailed understanding of the variation in the local structure of graphitic carbon nitrides is key for understanding structure-activity relationships. Here we apply aloof-beam vibrational electron energy-loss spectroscopy in the scanning transmission electron microscope (STEM) to locally detect variations in hydrogen content in two different layered carbon nitrides with nanometer resolution...
May 16, 2018: ACS Nano
https://www.readbyqxmd.com/read/29766346/polydopamine-based-molecularly-imprinting-polymers-on-magnetic-nanoparticles-for-recognition-and-enrichment-of-ochratoxins-prior-to-their-determination-by-hplc
#9
Meihua Hu, Pengcheng Huang, Lili Suo, Fangying Wu
A polydopamine-based molecularly imprinted polymer was deposited on the surface of magnetite (ferroferric oxide) nanoparticles (Fe3 O4 @PDA MIPs) and is shown to be an efficient and fairly specific sorbent for the extraction of various ochratoxins. The MIPs were characterized by IR spectroscopy and transmission electron microscopy. The adsorption capacities, evaluated through the langmuir adsorption isotherm model, are 1.8, 0.23 and 0.17 mg·g-1 for ochratoxin A, ochratoxin B and ochratoxin C, respectively...
May 15, 2018: Mikrochimica Acta
https://www.readbyqxmd.com/read/29764578/-protective-effect-of-astrocyte-exosomes-on-hypoxic-ischemic-neurons
#10
Jing-Lan Huang, Yi Qu, Jun Tang, Rong Zou, Shi-Ping Li, Ya-Fei Li, Li Zhang, Bin Xia, De-Zhi Mu
OBJECTIVE: To study the effect of astrocyte exosomes on hypoxic-ischemic neurons. METHODS: Rat astrocytes were cultured in vitro, and differential centrifugation was used to obtain the exosomes from the cell supernatant. Transmission electron microscopy, Nanosight, and Western blot were used for the identification of exosomes. BCA method was used to measure the concentration of exosomes. Rat neurons were cultured in vitro and then divided into control group, exosome group, oxygen glucose deprivation (OGD) group, and OGD+exosome group (n=3 each)...
May 2018: Zhongguo Dang Dai Er Ke za Zhi, Chinese Journal of Contemporary Pediatrics
https://www.readbyqxmd.com/read/29763759/an-eco-benign-synthesis-of-agnps-using-aqueous-extract-of-longan-fruit-peel-antiproliferative-response-against-human-breast-cancer-cell-line-mcf-7-antioxidant-and-photocatalytic-deprivation-of-methylene-blue
#11
Arif Ullah Khan, Qipeng Yuan, Zia Ul Haq Khan, Aftab Ahmad, Faheem Ullah Khan, Kamran Tahir, Muhammad Shakeel, Sadeeq Ullah
Plants mediated synthesis of noble metal nanoparticles is encountered as a clean, environment friendly, lucrative and benign loom. The current study consists of clean and green synthesis of Silver nanoparticles (AgNPs). Phytoconstituents from Longan (Euphorbia longana Lam.) fruit peel were used to reduce Ag+ into AgNPs. Different analytical techniques i.e. UV-vis Spectroscopy, X-ray diffraction spectroscopy (XRD), electron dispersive X-ray (EDX), High-resolution transmission electron microscopy (HRTEM) and Fourier transform infrared spectroscopy (FTIR) were used to analyze the synthesized AgNPs...
May 7, 2018: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/29761411/detection-of-pathogenic-viruses-in-the-ambient-air-in-seoul-korea
#12
Tae-Hee Han, Sang-Hun Park, Ju-Young Chung, Hyo-Won Jeong, Jihun Jung, Jae-In Lee, Young-Ok Hwang, Il-Young Kim, Jip-Ho Lee, Kweon Jung
The possible transport of pathogenic microorganisms during Asian dust events could be an important concern for health workers; however, this is still uncertain owing to a lack of supporting evidence. The present study aimed to investigate the presence of pathogenic microorganisms in air samples collected during the Asian and non-Asian dust periods. Between March and September 2016, air samples were collected at three weather observation stations in Seoul using a high-volume air sampler. Multiplex PCR was performed using the Allplex™ respiratory and gastrointestinal panel assay kits to detect 46 microorganisms...
May 14, 2018: Food and Environmental Virology
https://www.readbyqxmd.com/read/29757243/a-hybrid-tdma-csma-based-wireless-sensor-and-data-transmission-network-for-ors-intra-microsatellite-applications
#13
Long Wang, Yong Liu, Zengshan Yin
To achieve launch-on-demand for Operationally Responsive Space (ORS) missions, in this article, an intra-satellite wireless network (ISWN) is presented. It provides a wireless and modularized scheme for intra-spacecraft sensing and data buses. By removing the wired data bus, the commercial off-the-shelf (COTS) based wireless modular architecture will reduce both the volume and weight of the satellite platform, thus achieving rapid design and cost savings in development and launching. Based on the on-orbit data demand analysis, a hybrid time division multiple access/carrier sense multiple access (TDMA/CSMA) protocol is proposed...
May 12, 2018: Sensors
https://www.readbyqxmd.com/read/29742375/investigational-testing-for-zika-virus-among-u-s-blood-donors
#14
MULTICENTER STUDY
Paula Saá, Melanie Proctor, Gregory Foster, David Krysztof, Colleen Winton, Jeffrey M Linnen, Kui Gao, Jaye P Brodsky, Ronald J Limberger, Roger Y Dodd, Susan L Stramer
BACKGROUND: Because of the potential severe clinical consequences of Zika virus (ZIKV) infection, the large numbers of asymptomatic travelers returning from ZIKV-active areas, the detection of ZIKV nucleic acid in blood, and reports of transmission of ZIKV through transfusion, in 2016 the Food and Drug Administration released recommendations for individual-unit nucleic acid testing to minimize the risk of transmission of ZIKV through blood transfusions. METHODS: The American Red Cross implemented investigational screening of donated blood for ZIKV RNA by means of transcription-mediated amplification (TMA)...
May 10, 2018: New England Journal of Medicine
https://www.readbyqxmd.com/read/29742351/in-situ-imaging-the-oxygen-reduction-reactions-of-solid-state-na-o2-batteries-with-cuo-nanowires-as-the-air-cathode
#15
Qiunan Liu, Tingting Yang, Congcong Du, Yongfu Tang, Yong Sun, Peng Jia, Tongde Shen, Qiuming Peng, Jingzhao Chen, Hongjun Ye, Liqiang Zhang, Jian Yu Huang
We report real time imaging of the oxygen reduction reactions (ORRs) in all solid state sodium oxygen batteries (SOBs) with CuO nanowires (NWs) as the air cathode in an aberration-corrected environmental transmission electron microscope under an oxygen environment. The ORR occurred in a distinct two-step reaction: namely a first conversion reaction followed by a second multiple ORRs. In the former, CuO was first converted to Cu2O and then to Cu; in the latter, NaO2 formed first, followed by its disproportionation to Na2O2 and O2...
May 9, 2018: Nano Letters
https://www.readbyqxmd.com/read/29740437/targeting-and-therapy-of-glioblastoma-in-a-mouse-model-using-exosomes-derived-from-natural-killer-cells
#16
Liya Zhu, Ji Min Oh, Prakash Gangadaran, Senthilkumar Kalimuthu, Se Hwan Baek, Shin Young Jeong, Sang-Woo Lee, Jaetae Lee, Byeong-Cheol Ahn
Objective: Glioblastoma is a highly aggressive primary brain tumor that is resistant to radiotherapy and chemotherapy. Natural killer (NK) cells have been used to treat incurable cancers. Recent studies have investigated the effectiveness of NK-cell-derived exosomes (NK-Exo) for treating incurable cancers such as melanoma, leukemia, and neuroblastoma; however, NK-Exo have not been used to treat glioblastoma. In the present study, we investigated the antitumor effects of NK-Exo against aggressive glioblastoma both in vitro and in vivo and determined the tumor-targeting ability of NK-Exo by performing fluorescence imaging...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29740091/bragg-polarization-gratings-for-wide-angular-bandwidth-and-high-efficiency-at-steep-deflection-angles
#17
Xiao Xiang, Jihwan Kim, Michael J Escuti
Optical films and surfaces using geometric phase are increasingly demonstrating unique and sometimes enhanced performance compared to traditional elements employing propagation phase. Here, we report on a diffraction grating with wider angular bandwidth and significantly higher average first-order efficiency than the nearest prior art of metasurfaces, volume holographic gratings, and surface-relief gratings configured to achieve a steep deflection angle. More specifically, we demonstrate a liquid crystal (LC) polymer Bragg polarization grating (PG) with large angular bandwidth and high efficiency in transmission-mode for 532 nm wavelength and 400 nm period...
May 8, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29738525/optimizing-exosomal-rna-isolation-for-rna-seq-analyses-of-archival-sera-specimens
#18
Emily N Prendergast, Marcos Abraão de Souza Fonseca, Felipe Segato Dezem, Jenny Lester, Beth Y Karlan, Houtan Noushmehr, Xianzhi Lin, Kate Lawrenson
Exosomes are endosome-derived membrane vesicles that contain proteins, lipids, and nucleic acids. The exosomal transcriptome mediates intercellular communication, and represents an understudied reservoir of novel biomarkers for human diseases. Next-generation sequencing enables complex quantitative characterization of exosomal RNAs from diverse sources. However, detailed protocols describing exosome purification for preparation of exosomal RNA-sequence (RNA-Seq) libraries are lacking. Here we compared methods for isolation of exosomes and extraction of exosomal RNA from human cell-free serum, as well as strategies for attaining equal representation of samples within pooled RNA-Seq libraries...
2018: PloS One
https://www.readbyqxmd.com/read/29733185/conductive-polymers-encapsulating-to-enhance-electrochemical-performance-of-ni-rich-cathode-materials-for-li-ion-batteries
#19
Yanbing Cao, Xianyue Qi, Kaihua Hu, Yong Wang, Zhanggen Gan, Ying Li, Guorong Hu, Zhongdong Peng, Ke Du
Ni-rich cathode materials have drawn lots of attention owing to its high discharge specific capacity and low cost. Nevertheless, there are still some inherent problems which desiderate to be settled such as cycling stability and rate properties as well as thermal stability. In this paper, the conductive polymers which integrates the excellent electronic conductivity of polyaniline (PANI) and the high ionic conductivity of polyethylene glycol (PEG) is designed for the surface modification of LiNi0.8Co0.1Mn0...
May 7, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29733026/a-pharmaco-epidemiological-study-of-antibacterial-treatments-and-bacterial-diseases-in-norwegian-aquaculture-from-2011-to-2016
#20
Atle Lillehaug, Christine Børnes, Kari Grave
The sales and prescription of antibacterials for use in Norwegian fish-farming according to diagnosis, fish species and production stage from 2011 to 2016 are analysed. The study is based on antibacterial sales data from wholesalers, pharmacies and feed mills and on prescription data obtained from a register of all prescriptions of antibacterials used in farmed fish. The results show that the fish-farming industry uses very small volumes of antibacterials. In 2016, a total of 212 kg were sold; the only antibacterial substances sold were florfenicol and oxolinic acid...
May 7, 2018: Diseases of Aquatic Organisms
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