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https://www.readbyqxmd.com/read/29156397/composition-determination-of-multinary-iii-v-semiconductors-via-stem-haadf-multislice-simulations
#1
Lennart Duschek, Andreas Beyer, Jan Oliver Oelerich, Kerstin Volz
Knowledge of the microscopic elemental composition of multinary III/V semiconductor materials is crucial to the development of functionalized opto-electronic devices. Well-proven composition analysis methods, such as high resolution X-ray diffraction (HRXRD), fail to determine the elemental composition when more than three atomic species are involved. In this work we propose a procedure for the composition analysis of multinary III/V semiconductors at atomic resolution using high angle annular dark field (HAADF) scanning transmission electron microscopy (STEM) image simulations...
November 9, 2017: Ultramicroscopy
https://www.readbyqxmd.com/read/29156287/protective-effect-of-nigella-sativa-on-4-nonylphenol-induced-nephrotoxicity-in-clarias-gariepinus-burchell-1822
#2
Ahmed M Kotb, Mahmoud Abd-Elkareem, Nasser S Abou Khalil, Alaa El-Din H Sayed
The aim of this study was to examine the protective effects of Nigella sativa (N. sativa) on 4-Nonylphenol-induced nephrotoxicity in Clarias gariepinus. 30 fishes were divided into five groups: control, 4-nonylphenol-treated, 1% N. sativa treated, 2.5% N. sativa treated, and 5% N. sativa treated. N. sativa and 4-Nonylphenol were given for 3weeks. 4-NP and 4-NP-N. sativa treated fishes were compared with the control group. Kidney histology, immunochemistry, and electron microscope were assessed after 4-NP exposure...
November 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29155942/detergent-based-decellularization-strategy-preserves-macro-and-microstructure-of-heart-valves
#3
Jessica Haupt, Georg Lutter, Stanislav N Gorb, Dan T Simionescu, Derk Frank, Jette Seiler, Alina Paur, Irma Haben
OBJECTIVES: Biological tissue has great potential to function as bioprostheses in patients for heart valve replacement. As these matrices are mainly xenogenic, the immunogenicity needs to be reduced by decellularization steps. Reseeding of bioscaffolds has tremendous potential to prevent calcification upon implantation, so intact microstructure of the material is mandatory. An optimal decellularization protocol of heart valves resulting in adequate preservation of the extracellular architecture has still not been developed...
October 9, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/29155784/correlative-super-resolution-and-electron-microscopy-to-resolve-protein-localization-in-zebrafish-retina
#4
José M Mateos, Gery Barmettler, Jana Doehner, Irene Ojeda Naharros, Bruno Guhl, Stephan C F Neuhauss, Andres Kaech, Ruxandra Bachmann-Gagescu, Urs Ziegler
We present a method to investigate the subcellular protein localization in the larval zebrafish retina by combining super-resolution light microscopy and scanning electron microscopy. The sub-diffraction limit resolution capabilities of super-resolution light microscopes allow improving the accuracy of the correlated data. Briefly, 110 nanometer thick cryo-sections are transferred to a silicon wafer and, after immunofluorescence staining, are imaged by super-resolution light microscopy. Subsequently, the sections are preserved in methylcellulose and platinum shadowed prior to imaging in a scanning electron microscope (SEM)...
November 10, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29155397/facile-phyto-mediated-synthesis-of-silver-nanoparticles-using-chinese-winter-jujube-ziziphus-jujuba-mill-cv-dongzao-extract-and-their-antibacterial-catalytic-properties
#5
Chun-Gang Yuan, Can Huo, Bing Gui, Jing-Fu Liu, Yong-Sheng Chen
The aqueous extract of Chinese winter jujube (Ziziphus jujuba Mill. cv. Dongzao) was used as reducing and capping agents for the synthesis of silver nanoparticles (AgNPs) for the first time. The resulting AgNPs were characterised by UV/Visible (UV-Vis) spectroscopy, atomic force microscope, transmission electron microscopy, selected area electron diffraction, X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray and Fourier transform infrared spectroscopy (FTIR). The colloidal solution of AgNPs gave a maximum UV-Vis absorbance at 446 nm...
December 2017: IET Nanobiotechnology
https://www.readbyqxmd.com/read/29154780/the-feedback-loop-of-emmprin-nf-%C3%AE%C2%BAb-worsens-atherosclerotic-plaque-via-suppressing-autophagy-in-macrophage
#6
Xing Liang, Xianhua Hou, Yang Yang, Hong Liu, Ruiwei Guo, Zhihua Yang, Lixia Yang
This study examined the significance of macrophage autophagy in extracellular matrix metalloproteinase inducer (EMMPRIN)-mediated atherosclerosis (AS). Apolipoprotein E-deficient (ApoE-/-) mice were fed a western diet to establish an AS model. EMMPRIN and p62/Sequestosome-1(SQSTM1) expression were evaluated in plaque macrophages from the AS mice using immunofluorescence. The EMMPRIN and p62/SQSTM1 protein expression levels in macrophages increased with the increasing vulnerability of the atherosclerotic plaques...
November 14, 2017: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/29154504/comparative-study-of-image-contrast-in-scanning-electron-microscope-and-helium-ion-microscope
#7
R O'Connell, Y Chen, H Zhang, Y Zhou, D Fox, P Maguire, J J Wang, C Rodenburg
Images of Ga(+) -implanted amorphous silicon layers in a 110 n-type silicon substrate have been collected by a range of detectors in a scanning electron microscope and a helium ion microscope. The effects of the implantation dose and imaging parameters (beam energy, dwell time, etc.) on the image contrast were investigated. We demonstrate a similar relationship for both the helium ion microscope Everhart-Thornley and scanning electron microscope Inlens detectors between the contrast of the images and the Ga(+) density and imaging parameters...
December 2017: Journal of Microscopy
https://www.readbyqxmd.com/read/29154446/transmission-electron-microscopy-helpfulness-in-whipple-s-disease-masked-by-immunosuppressant-therapy-for-arthritis
#8
Alessandra Loiodice, Giuseppe Losurdo, Andrea Iannone, Roberta Rossi, Maria Grazia Fiore, Domenico Piscitelli
A 61-year-old woman received a diagnosis of undifferentiated non-erosive arthritis in 2010 and assumed methotrexate and steroids in 2014. After 1 year, she experienced watery diarrhea, vomiting, fever, weight loss, and severe hypoalbuminemia, thus being admitted into our Unit. Esophagogastroduodenoscopy showed duodenal lymphangiectasia and duodenal biopsy samples several foamy PAS-positive macrophages and villous subtotal atrophy. Transmission electron microscope demonstrated several extracellular and intracellular rod-shaped bacteria (Tropheryma whipplei)...
November 20, 2017: APMIS: Acta Pathologica, Microbiologica, et Immunologica Scandinavica
https://www.readbyqxmd.com/read/29154049/date-palm-biochar-polymer-composites-an-investigation-of-electrical-mechanical-thermal-and-rheological-characteristics
#9
Anesh Manjaly Poulose, Ahmed Yagoub Elnour, Arfat Anis, Hamid Shaikh, S M Al-Zahrani, Justin George, Mohammad I Al-Wabel, Adel R Usman, Yong Sik Ok, Daniel C W Tsang, Ajit K Sarmah
The application of biochar (BC) as a filler in polymers can be viewed as a sustainable approach that incorporates pyrolysed waste based value-added material and simultaneously mitigate bio-waste in a smart way. The overarching aim of this work was to investigate the electrical, mechanical, thermal and rheological properties of biocomposite developed by utilizing date palm waste-derived BC for the reinforcing of polypropylene (PP) matrix. Date palm waste derived BC prepared at (700 and 900°C) were blended at different proportions with polypropylene and the resultant composites (BC/PP) were characterized using an array of techniques (scanning electron microscope, energy-dispersive X-ray spectroscopy and Fourier transform infra-red spectroscopy)...
November 15, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29153946/effect-of-brownian-motion-on-reduced-agglomeration-of-nanostructured-metal-oxide-towards-development-of-efficient-cancer-biosensor
#10
Suveen Kumar, Ashish, Saurabh Kumar, Shine Augustine, Santosh Yadav, Birendra Kumar Yadav, Rishi Pal Chauhan, Ajay Kumar Dewan, Bansi Dhar Malhotra
We report results of the studies relating to fabrication of nanostructured metal oxide (NMO) based cancer biosensor. With the help of 2D electroactive reduced graphene oxide (RGO), we successfully inhibited the Brownian motion of NMO that led to reduced agglomeration of NMO. The nanostructured hafnium oxide (nHfO2) was used as a model NMO. The reduced agglomeration of nHfO2 was achieved through controlled hydrothermal synthesis and investigated via nanoparticles tracking analysis (NTA). X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscope (TEM) techniques were used for phase identification as well as morphological analysis of the synthesized nanohybrid (nHfO2@RGO) material...
November 10, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/29152779/morphogenesis-of-lingual-papillae-of-one-humped-camel-camelus-dromedarius-during-prenatal-life-a-light-and-scanning-electron-microscopic-study
#11
A S Abou-Elhamd, M Abd-Elkareem, A El-Zuhry Zayed
This study was made on 24 camel fetuses of crown-rump vertebral length (CVRL) ranging from 10.5 cm to 105 cm CVRL (94-352 days old). These camel fetuses were classified into three groups representing the three trimesters of prenatal life. During the first trimester (94-142 days), lingual papillae (circumvallate and lentiform papillae) were demonstrated on the lingual root, but lingual body and the apex were almost free of papillae except for some scattered epithelial projections especially near the lateral borders of the body...
November 19, 2017: Anatomia, Histologia, Embryologia
https://www.readbyqxmd.com/read/29152654/nephrin-loss-is-reduced-by-grape-seed-proanthocyanidins-in-the-experimental-diabetic-nephropathy-rat-model
#12
Xianhua Li, Zhaoli Gao, Haiqing Gao, Baoying Li, Tao Peng, Bei Jiang, Xiangdong Yang, Zhao Hu
Diabetic nephropathy (DN) is one of the major causes of end‑stage renal failure. Grape seed proanthocyanidin extracts (GSPE) are known to act as antioxidants. The current study aimed to determine the effects of GSPE on the streptozotocin (STZ)‑induced diabetic rat model and to explore the underlying mechanism of its action. Wistar rats were induced into a diabetic state by injection of STZ and were treated with 250 mg·kg‑1·day‑1 GSPE for 24 weeks. Kidney samples were collected for observation of renal pathological changes by light microscope (periodic acid‑Schiff staining) and electron microscopy...
October 19, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29151904/inhibition-of-autophagy-attenuated-curcumol-induced-apoptosis-in-mg-63-human-osteosarcoma-cells-via-janus-kinase-signaling-pathway
#13
Chuan Zhang, Li-Min Wang
The present study aimed to investigate whether autophagy was triggered by curcumol and to explore the association between autophagy and apoptosis of MG-63 cells and the underlying mechanism. MG-63 cells were cultured in vitro. An MTT assay was performed to evaluate the proliferation inhibition of the MG-63 osteosarcoma cell line by curcumol. Fluorescein isothiocyanate-Annexin V/propidium iodide staining flow cytometry was performed to analyze the apoptotic rate of cells. The morphological alterations of cell nuclei were evaluated by Hoechst 33258 viable cell staining...
December 2017: Oncology Letters
https://www.readbyqxmd.com/read/29151644/preparation-characterization-and-antimicrobial-properties-of-chitosan-silver-nanocomposites-films-against-fish-pathogenic-bacteria-and-fungi
#14
S H S Dananjaya, D C M Kulatunga, G I Godahewa, Chamilani Nikapitiya, Chulhong Oh, Madurani Edussuriya, Jehee Lee, Mahanama De Zoysa
Abstract: Development of nanostructured films using natural polymers and metals has become a considerable interest in various biomedical applications. Objective of the present study was to develop silver nano particles (AgNPs) embedded chitosan films with antimicrobial properties. Based on the Ag content, two types of chitosan silver nano films, named as CAgNfs-12 (12 mM) and CAgNfs-52 (52 mM) were prepared and characterized. Field emission scanning electron microscope (FE-SEM) images of two CAgNfs showed the circular AgNPs, which were uniformly embedded and distributed in the matrix of chitosan films...
December 2017: Indian Journal of Microbiology
https://www.readbyqxmd.com/read/29151348/polysulfone-sio2-hybrid-shell-microcapsules-synthesized-by-the-combination-of-pickering-emulsification-and-solvent-evaporation-technique-and-their-application-in-self-lubricating-composites
#15
Haiyan Li, Shuang Li, Zhike Li, Yanji Zhu, Huaiyuan Wang
Lubricant oil-filled polysulfone/SiO2 (PSF/SiO2) hybrid shell microcapsules are prepared by the combination of Pickering emulsification and the solvent evaporation technique. Silica particles are used as stabilizers. The structure and properties of the microcapsules are influenced by the silica particle concentration, agitation speed, and encapsulation temperature. The formation of PSF/SiO2 hybrid microcapsules is confirmed by scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FTIR), and thermal gravimetric analysis (TGA)...
November 18, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29151127/permeability-of-hair-to-cadmium-copper-and-lead-in-five-species-of-terrestrial-mammals-and-implications-in-biomonitoring
#16
A N Rendón-Lugo, P Santiago, I Puente-Lee, L León-Paniagua
The capacity of mammal hair to absorb toxic metals and its utility in biomonitoring has been broadly studied. Though these metal-binding properties has generally been attributed to the sulphur contained in cysteine, an amino acid that forms part of keratin, there are not many experimental studies that analyze the role of sulphur in the external deposition of potentially toxic metallic elements in order to better understand the potential of hair in biomonitoring and generate better tools for differentiating between internal and external deposition of contaminants...
November 18, 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29150256/reproductive-effects-linked-to-dna-methylation-in-male-zebrafish-chronically-exposed-to-environmentally-relevant-concentrations-of-di-2-ethylhexyl-phthalate
#17
Yan-Bo Ma, Pan-Pan Jia, Muhammad Junaid, Li Yang, Chun-Jiao Lu, De-Sheng Pei
Di-(2-ethylhexyl) phthalate (DEHP) possesses the potential to interfere with the male reproductive endocrine system in mammals; however, its reproductive toxicity in male zebrafish and associated epigenetic studies have not been explored. In this study, three-month-old male zebrafish were exposed to environmentally relevant concentrations of DEHP (0, 10, 33 and 100 μg/L) for 3 months, and then the impact on the reproduction of males and the underlying mechanism were investigated. Histological testing showed that an exposure concentration of 100 μg/L DEHP significantly inhibited spermatogenesis, with an associated decline in capability to fertilize untreated oocytes...
November 14, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29149559/core-shell-microstructure-induced-synergistic-effect-for-efficient-water-droplet-formation-and-cloud-seeding-application
#18
Yanlong Tai, Haoran Liang, Nabil El Hadri, Ali M Abshaev, Buzgigit M Huchinaev, Steve Griffiths, Mustapha Jouiad, Linda Zou
Cloud-seeding materials as a promising water-augmentation technology have drawn more attention recently. We designed and synthesized a novel type of core/shell NaCl/TiO2 (CSNT) particles with controlled particle size, which successfully adsorbed more water vapor (~ 295 times at low relative humidity, 20 % RH) than that of pure NaCl, deliquesced at lower environmental RH of 62 - 66 % than the hygroscopic point (hg.p., 75 % RH) of NaCl, and formed larger water droplets ~ 6 - 10 times of its original measured size area, whereas the pure NaCl still remained as crystal at the same condition...
November 17, 2017: ACS Nano
https://www.readbyqxmd.com/read/29149049/preparation-of-solution-blown-polyamic-acid-nanofibers-and-their-imidization-into-polyimide-nanofiber-mats
#19
Jing Li, Guocheng Song, Junrong Yu, Yan Wang, Jing Zhu, Zuming Hu
Solution blow spinning (SBS) is an innovative process for spinning micro/nanofibers. In this paper, polyamic acid (PAA) nanofibers were fabricated via a SBS apparatus and then imidized into polyimide (PI) nanofibers via thermal process. The morphology and diameter distributions of PAA nanofibers were determined by scanning electron microscope (SEM) and Image Tool software, the processing parameters, including PAA concentration, solution feeding rate, gas pressure, nozzle size, and receiving distance were investigated in details...
November 17, 2017: Nanomaterials
https://www.readbyqxmd.com/read/29148917/evaluation-of-antibacterial-activity-and-toxic-metal-removal-of-chemically-synthesized-magnetic-iron-oxide-titanium-coated-nanoparticles-and-application-in-bacterial-treatment
#20
Yasser A M Abdulhady, Mona M El-Shazly, Reham F El-Kased
Co-precipitation method was used for preparation of two types of iron oxide nanoparticles coated by titanium dioxide according to divalent salts used. The average size of iron oxide nanoparticles coated by titanium dioxide measured by particle size analyzer, ranged approximately between 20 nm and 100 nm with mean particle size of 60 nm. Characterization of the prepared nanoparticles was done by X-ray diffraction analysis and scanning electron microscope indicating the sole existence of inverse cubic spinel phase of magnetic iron oxide nanoparticles...
November 17, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
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