Absorption spectra, energy dispersive analysis of X-rays and transmission electron microscopy of silver particles in sol-gel glass films

1988 ◽  
Vol 153 (2-3) ◽  
pp. 203-209 ◽  
Author(s):  
D. Brusilovsky ◽  
M. Eyal ◽  
R. Reisfeld
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Absorption Spectra ◽  
Sol Gel ◽  
Energy Dispersive ◽  
X Rays ◽  
Silver Particles ◽  
Energy Dispersive Analysis ◽  
Dispersive Analysis ◽  
Transmission Electron

Acute response of lung parenchyma to volcanic ash

1983 ◽  
Vol 41 ◽  
pp. 680-681
Author(s):  
R.F. Dodson ◽  
T. Akematsu ◽  
M.G. Williams ◽  
M.F. O'Sullivan ◽  
G. A. Hurst
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Energy Dispersive ◽  
Energy Dispersive Analysis ◽  
Short Term ◽  
Vascular Perfusion ◽  
X Ray ◽  
Dispersive Analysis ◽  
Transmission Electron ◽  
Short Term Exposure

The eruption of Mt. St. Helens on May 18, 1980, resulted in a concentrated short-term exposure for a large segment of the population of eastern Washington, northern Idaho, and western Montana. Samples were collected from all three regions and the respirable size particles (⋜0.6μ) were separated and analyzed. The predominance of the respirable size fraction was found by X-ray energy dispersive analysis to be alumino silicates. A homogeneous preparation was intratracheally injected into young adult guinea pigs. The dose given the animals consisted of 52.5 mg in saline. This dose provided a short-term heavy exposure setting similar to that of the populus. At the end of the selected post-injection intervals of either 2 or 4 hours or 1 through 7 days, the animals were sacrificed by vascular perfusion through the right ventricle.Embedded tissue samples were reviewed at the light microscopy level and selected fields were thin sectioned for transmission electron microscopy and scanning transmission electron microscopy (correlated with X-ray energy dispersive analysis). The EM was carried out on a JEOL 100CX TEMSCAN.

scholarly journals Investigation Into the Cause of Failure of a Turboprop Impeller in Service

1985 ◽  
Author(s):  
H. Y. Wong
Keyword(s):  
Electron Microscopy ◽  
Fatigue Fracture ◽  
Low Pressure ◽  
Energy Dispersive ◽  
Energy Dispersive Analysis ◽  
Electron Fractography ◽  
X Ray ◽  
Dispersive Analysis ◽  
Transmission Electron ◽  
Cause Of Failure

A 2-stage centrifugal flow turboprop Dart engine failed recently in service due to the failure of the low pressure impeller. Examination by various techniques including electron microscopy based on scanning, energy dispersive analysis of x-ray and transmission electron fractography indicates that the cause was metallurgical in nature, resulting from a material manufacturing defect followed by fatigue fracture and finally by tensile rupture of the material.

Interfacial precipitation in titania-doped diphasic mullite gels

1998 ◽  
Vol 13 (4) ◽  
pp. 974-978 ◽  
Author(s):  
Seong-Hyeon Hong ◽  
Naesung Lee ◽  
Altaf H. Carim ◽  
Gary L. Messing
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
High Resolution ◽  
Phase Transformations ◽  
Orientation Relationship ◽  
Sol Gel ◽  
Sintered Body ◽  
Transmission Electron

Interfacial precipitation in sol-gel derived, titania-doped diphasic mullite gels was investigated using conventional and high resolution transmission electron microscopy. Rutile, anatase, and brookite precipitated on the interface between {110} planes of mullite and glass pockets in the sintered body. The formation of brookite may be attributable to the Si- and Al-rich environment during precipitation. Each polymorph of titania has a unique morphology and orientation relationship with mullite. Brookite exhibits a truncated pill box shape, and anatase displays a vermicular morphology. Quenching experiments suggest that the precipitates grow and undergo phase transformations during cooling.

Pulmonary silicosis in 2 rock hyraxes, and literature review

2021 ◽  
pp. 104063872110575
Author(s):  
Bianca R. Pfisterer ◽  
Anthony L. Ashley ◽  
Robert L. Donnell ◽  
John R. Dunlap ◽  
Kim M. Newkirk
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Medical Center ◽  
Fibrous Tissue ◽  
Crystalline Silica ◽  
Energy Dispersive ◽  
Intact Male ◽  
Crystal Deposition ◽  
X Ray ◽  
Transmission Electron

Two rock hyraxes ( Procavia capensis), from the Chattanooga Zoo, were submitted separately for autopsy at the University of Tennessee Veterinary Medical Center. The first was a 4-y-old intact female that died without premonitory signs and the second was a 10-y-old intact male that was euthanized because of severe renal disease. Microscopically, the lungs of both hyraxes had multifocal-to-coalescing, <1-mm diameter aggregates of epithelioid macrophages separated by streams of fibrous tissue. Macrophages contained intracytoplasmic, clear, acicular, birefringent crystals. Transmission electron microscopy and energy-dispersive x-ray spectroscopy findings on the lung samples were consistent with silica crystal deposition. The hyraxes had been housed together on commercially sourced play sand composed of 99–99.5% quartz, a crystalline silica polymorph. The microscopic findings, transmission electron microscopy, and energy-dispersive x-ray spectroscopy of the intrahistiocytic crystals, in addition to the history of exposure to crystalline silica, were consistent with pulmonary silicosis. Pulmonary silicosis has not been reported previously in rock hyraxes, to our knowledge.

Eu3+/Tb3+ Co-Doped Cerium Oxide Transparent Nanocomposite for Color-Tunable Emission

NANO ◽  
2018 ◽  
Vol 13 (10) ◽  
pp. 1850119
Author(s):  
Xiaoyan Li ◽  
Yunlong Yu ◽  
Xiangfeng Guan ◽  
Peihui Luo ◽  
Linqin Jiang ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Thermal Stability ◽  
Transmission Electron Microscopy ◽  
Sol Gel ◽  
Homogeneous Precipitation ◽  
Transmission Electron ◽  
Color Tunable ◽  
Co Doped ◽  
Tunable Emission

Eu[Formula: see text]/Tb[Formula: see text] co-doped nanocomposite containing CeO2 nanocrystals was successfully prepared by an in situ sol–gel polymerization approach. High-resolution transmission electron microscopy demonstrated the homogeneous precipitation of CeO2 nanocrystals among the polymethylmethacrylate (PMMA) matrix. The thermal stability and UV-shielding capability of the obtained nanocomposite were improved with increase of CeO2 content. The tuning of the emissive color from green and yellow to red can be easily achieved by varying the dopant species and concentration. These results suggested that the obtained nanocomposite could be potentially applicable in transparent solid-state luminescent devices.

Structural and analytical studies of the silicified macrohairs from the lemma of the grass Phalaris canariensis L

1984 ◽  
Vol 222 (1229) ◽  
pp. 427-438 ◽  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Silica Particles ◽  
Time Dependent ◽  
Energy Dispersive ◽  
X Ray ◽  
Analytical Studies ◽  
Transmission Electron ◽  
Cellular Control ◽  
Phalaris Canariensis

Silicified macrohairs from mature and immature lemmas of the grass Phalaris canariensis L. have been studied by scanning (s.e.m.) and transmission electron microscopy (t.e.m.) and energy dispersive X-ray analysis (e.d.X.a.) at various times after emergence of the inflorescence. Within the macrohairs a variety of morphologies of silica particles was observed. E.d.X.a. revealed the time-dependent concentrations in the macrohairs of the elements K, Cl, P, and S, in addition to Si. Much lower levels of these elements were found in highly silicified mature macrohairs than in the immature macrohairs. It is proposed that the hairs are silicified under strict cellular control.

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