Application of Scanning Electron Microscopy With Energy-Dispersive X-Ray Spectroscopy for Analyzing Ocular Surface Particles on Schirmer Strips

Purpose: To demonstrate the application of scanning electron microscopy with energy-dispersive x-ray spectroscopy (SEM/EDS) for analyzing Schirmer strips for particle concentration, size, morphology, and type distribution. Methods: A cross-sectional design was used. Patients were prospectively recruited from the Miami Veterans Affairs (VA) Healthcare System eye clinic, and they underwent a complete ocular surface examination. The size, type, and chemical composition of particulate matter on Schirmer strips (from the left eye) were analyzed using SEM/EDS. Results: Schirmer strips from all 6 patients showed particle loading, ranging from 1 to 33 particles, whereas the blank Schirmer strip that served as a control showed no particle loading. Most particles were coarse, with an average size of 19.7 μm (95% confidence interval 15–24.4 μm). All samples contained organic particles (eg, pollen and mold), and 5 of the 6 samples contained nonorganic particles. The nonorganic particles were composed of silicon, minerals, and metals, including gold and titanium. The size of aluminum and iron particles was ≥62 μm, whereas the size of 2 other metals, zinc and gold, was smaller, that is,
Source: Cornea - Category: Opthalmology Tags: Techniques Source Type: research

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Source: Reactive and Functional Polymers - Category: Chemistry Source Type: research
Publication date: 25 November 2019Source: Journal of Industrial and Engineering Chemistry, Volume 79Author(s): Su-Un Lee, You-Jin Lee, Jeong-Rang Kim, Kwang-Eun Jeong, Soon-Yong JeongAbstractSilicoaluminophsophate (SAPO)-34 is considered as a promising catalyst for methanol-to-olefin (MTO) reaction, because its cylinder-like cages with small 8-ring pore openings restrict the diffusion of large hydrocarbons and exceptionally give high selectivity for light olefins. However, its main drawback is rapid catalytic deactivation by heavy hydrocarbons confined inside the cages. Here, we report a facile synthetic strategy for submi...
Source: Journal of Industrial and Engineering Chemistry - Category: Chemistry Source Type: research
We report the fabrication of bimetallic NiCo2Se4 and CoNi2Se4 nanostructures on nickel-foam (Ni-foam) substrates via a potentiostatic-deposition method by adjusting the molar ratio of Ni and Co metals. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) analyses show that burl-like clusters with characteristic fluffy NiCo2Se4 and flake-like CoNi2Se4 hierarchical structures were deposited on the Ni-foam substrates. When used as battery-type electrodes in supercapacitors, both NiCo2Se4 and CoNi2Se4 electrodes exhibited outstanding capacity and good electrochemical properties. The CoNi2Se4 electrode ...
Source: Journal of Industrial and Engineering Chemistry - Category: Chemistry Source Type: research
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Source: Journal of Alloys and Compounds - Category: Chemistry Source Type: research
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Source: NeuroImage: Clinical - Category: Radiology Source Type: research
CONCLUSIONS: AAD does not appear to impact the mid-term outcomes in a cohort of subjects undergoing TAVI. PMID: 31522139 [PubMed - as supplied by publisher]
Source: The Journal of Invasive Cardiology - Category: Cardiology Tags: J Invasive Cardiol Source Type: research
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Source: Dr.Malpani's Blog - Category: Reproduction Medicine Source Type: blogs
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Source: Thermochimica Acta - Category: Chemistry Source Type: research
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Source: Journal of Alloys and Compounds - Category: Chemistry Source Type: research
This study clearly demonstrates the excellent thermal insulation properties of the TBCs and shows that the thermal insulation performance can be significantly enhanced by increasing the thickness of the ceramic layer.
Source: Journal of Alloys and Compounds - Category: Chemistry Source Type: research
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