Surface Morphology of Polyvinyl Chloride and Silicone Elastomer Umbilical Artery Catheters by Scanning Electron Microscopy

PEDIATRICS ◽  
1978 ◽  
Vol 62 (5) ◽  
pp. 702-705
Author(s):  
C. C. Clawson ◽  
Stephen J. Boros
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Surface Morphology ◽  
Polyvinyl Chloride ◽  
Umbilical Artery ◽  
Silicone Elastomer ◽  
X Ray ◽  
Surface Features ◽  
Scanning Electron

The surface features of a new siliconmer elastomer umbilical artery catheter have been defined by scanning electron microscopy and compared with those of a standard polyvinyl chloride catheter. Little difference was noted in the surfaces of the catheter materials themselves, but the radiopaque material used to render the catheters visible by x-ray resulted in a considerable difference in the overall smoothness. The polyvinyl chloride catheter's marker was in the form of a wide, rough band extending the length of the tubing whereas the marker particles of the silicone elastomer were dispersed, more uniform in size, and resulted in less overall irregularity of the surface.

scholarly journals Coal combustion residues characterization using scanning electron microscopy & energy dispersive x-ray (sem-edxa) analysis

2018 ◽  
Vol 2 (2) ◽  
Author(s):  
Charu Arora 1 ◽  
Ritesh Kumar 2 ◽  
Sadanand Sharma 2 ◽  
Ajit Kumar 2
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Surface Morphology ◽  
Coal Combustion ◽  
Thermal Power ◽  
Energy Dispersive ◽  
X Ray ◽  
Power Stations ◽  
Thermal Power Stations ◽  
Scanning Electron

The objective of the present study is to observe the surface morphology, structure and elemental composition of the ash particles produced from some thermal power stations of India using scanning electron microscopy (SEM) and energy dispersive x-ray analysis (EDXA). This information is useful to better understand the ash particles before deciding its utility in varied areas.

Nanostructured Morphology of Spinel LiMn2O4 Oxide under Microwave Heating

2014 ◽  
Vol 936 ◽  
pp. 452-458
Author(s):  
Di Huo
Keyword(s):  
Crystal Structure ◽  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Surface Morphology ◽  
Microwave Heating ◽  
X Ray Diffraction ◽  
X Ray ◽  
Synthesis Conditions ◽  
Morphology And Structure ◽  
Scanning Electron

The surface morphology and structure of the cubic stoichiometric spinel LiMn2O4powder prepared by microwave heating were examined using X-ray diffraction, scanning electron microscopy and transmittance electron microcopy. It is shown that the surface morphology of LiMn2O4particle changed with increasing preparing temperature, while the crystal structure kept unchanged. Novel nanostructured morphologies including nanorods and nanowhiskers were formed under appropriate synthesis conditions. The growth mechanism of the nanostructured morphology of spinel LiMn2O4was discussed in accordance with period bonding chains (PBCs) theory.

scholarly journals Структурные превращения в борате железа при высокотемпературном отжиге

2019 ◽  
Vol 89 (8) ◽  
pp. 1229
Author(s):  
С.В. Ягупов ◽  
Н.И. Снегирёв ◽  
К.А. Селезнева ◽  
Е.Т. Милюкова ◽  
Ю.А. Могиленец ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Surface Morphology ◽  
Diffraction Analysis ◽  
X Ray Diffraction ◽  
Iron Borate ◽  
X Ray ◽  
Different Temperatures ◽  
Scanning Electron

Surface morphology and crystal structure of iron borate, FeBO3, annealed at different temperatures, have been studied by scanning electron microscopy and X-ray diffraction analysis. The temperature range of structurally stability of iron borate has been determined. It has been established that in the range of temperatures 800–900°C recrystallization in the iron orthoborate Fe3BO6 phase, and more than 900°C − in α-Fe2O3 phase, occurs.

The Treated Cellulose Micro/Nano Fibers (CMNF) from Bioresources in Malaysia

2016 ◽  
Vol 846 ◽  
pp. 434-439 ◽  
Author(s):  
Fauziah Abdul Aziz ◽  
Ariffin Ismail ◽  
Wan Yunus Wan Md Zin ◽  
Norazman Mohamad Nor ◽  
Risby Mohd Sohaimi ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Surface Morphology ◽  
Field Emission ◽  
Alkaline Treatment ◽  
Musa Acuminata ◽  
Ananas Comosus ◽  
X Ray Diffraction ◽  
X Ray ◽  
Scanning Electron

Cellulose Micro/Nano fibers (CMNF) from various plants which is Resak (Vatica spp.) waste, Merbau (Intsia bijuga) waste, banana (Musa acuminata) pseudo-stem and pineapple (Ananas comosus) leaf fibers have been isolated and characterized. Isolation of microfibril cellulose from raw fibers was achieved using alkaline treatment and bleaching. The treated and untreated samples were characterized using x-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM). Characterizations of treated and untreated samples were compared. The comparison between those treated and untreated samples giving different crystallite size, crystallinity, arrangement of CMNF and surface morphology from different plants. Hence, with these information different nanocomposite from CMNF can be constructed and manipulated for various application.

SiC Thin Films by Chemical Conversion of Single Crystal Si

1991 ◽  
Vol 250 ◽  
Author(s):  
Chien C. Chiu ◽  
Chi Kong Kwok ◽  
Seshu B. Desu
Keyword(s):  
Electron Microscopy ◽  
Thin Films ◽  
Scanning Electron Microscopy ◽  
Surface Morphology ◽  
Smooth Surface ◽  
Reaction Times ◽  
Chemical Conversion ◽  
X Ray ◽  
Sic Films ◽  
Scanning Electron

AbstractThe reaction of (100)Si with C2H2 in a hot wall CVD reactor has been studied using a X-ray photolectron spectroscopy, and a scanning electron microscopy. The growth of the SiC films was observed through the behavior of Si2p peaks and their plasmons. Smooth surface morphology with a monolayer of SiC was obtained at 950°C for 7 minutes and defects were observed for longer reaction times at this temperature. For higher reaction temperatures (e.g. 1000°C), defects were observed for reaction times as short as 10 seconds. The formation of defects was correlated to the out-diffusion of Si in the carborization process.

Corrosion Behaviour of Nanocrystalline Zn-Ni and Zn-Ni-Co Electrodeposits

2011 ◽  
Vol 409 ◽  
pp. 526-531 ◽  
Author(s):  
L. Monaco ◽  
J.L. McCrea ◽  
G. Palumbo ◽  
Uwe Erb
Keyword(s):  
Electron Microscopy ◽  
Aqueous Solution ◽  
Scanning Electron Microscopy ◽  
Corrosion Resistance ◽  
Surface Morphology ◽  
Corrosion Behaviour ◽  
High Strength ◽  
Corrosion Resistant ◽  
X Ray ◽  
Scanning Electron

In this study, alternatives to corrosion-resistant cadmium coatings on high strength steel fasteners are explored. Nanocrystalline Zn-Ni and Zn-Ni-Co electrodeposits, synthesized by electrochemical deposition, were analyzed by potentiodynamic polarization in a 1M NaCl aqueous solution, to determine the corrosion behaviour of the alloys. Sample coatings were characterized using scanning electron microscopy to examine differences in surface morphology that can affect corrosion resistance. Energy dispersive x-ray spectroscopy was used to relate composition to corrosion resistance and to characterize the corrosion behavior during polarization. All coatings showed corrosion potentials at equivalent, or lower values than that of cadmium, suggesting that both alloys are viable as cadmium replacements. Specific compositions showed slightly passivating regions, but the brittle film formed during polarization is unstable. Comparatively, Zn-Ni shows a better resistance to corrosion than Zn-Ni-Co. The effect of composition on the corrosion resistance can be explained on the basis of the sacrificial depletion of Zn over Ni.

The Synthesis of Polycrystalline Chalcopyrite Semiconductors by Microwave Irradiation

1993 ◽  
Vol 327 ◽  
Author(s):  
Christopher C. Landry ◽  
Andrew R. Barron
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Surface Morphology ◽  
Microwave Irradiation ◽  
Photoelectron Spectroscopy ◽  
X Ray Diffraction ◽  
X Ray ◽  
Edx Analysis ◽  
Chalcopyrite Semiconductors ◽  
Scanning Electron

AbstractPolycrystalline samples of the chalcopyrites CuInS2, CuInSe2, AgInS2, and AgInSe2 have been prepared from stoichiometric mixtures of the pure elements using microwave irradiation. The reactions were performed in sealed quartz tubes in as few as three minutes. The products were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray (EDX) analysis, and X-ray photoelectron spectroscopy (XPS). The surface morphology and shape of the particles produced by this method suggests that the products are formed from liquid melts.

Identification of calcium oxalate crystals in dried or fixed tobacco leaf

1984 ◽  
Vol 42 ◽  
pp. 288-289
Author(s):  
Vicki L. Baliga ◽  
Mary Ellen Counts
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Calcium Oxalate ◽  
Growth And Development ◽  
Polarized Light ◽  
Calcium Oxalate Crystals ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Scanning Electron

Calcium is an important element in the growth and development of plants and one form of calcium is calcium oxalate. Calcium oxalate has been found in leaf seed, stem material plant tissue culture, fungi and lichen using one or more of the following methods—polarized light microscopy (PLM), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and x-ray diffraction.Two methods are presented here for qualitatively estimating calcium oxalate in dried or fixed tobacco (Nicotiana) leaf from different stalk positions using PLM. SEM, coupled with energy dispersive x-ray spectrometry (EDS), and powder x-ray diffraction were used to verify that the crystals observed in the dried leaf with PLM were calcium oxalate.

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