Particle size, size distribution and morphological evaluation of airborne dust particles of diverse woods by Scanning Electron Microscopy and image processing program

2012 ◽  
Vol 225 ◽  
pp. 65-71 ◽  
Author(s):  
Alida Mazzoli ◽  
Orlando Favoni
Keyword(s):  
Electron Microscopy ◽  
Image Processing ◽  
Scanning Electron Microscopy ◽  
Particle Size ◽  
Size Distribution ◽  
Dust Particles ◽  
Airborne Dust ◽  
Morphological Evaluation ◽  
Processing Program ◽  
Scanning Electron

Inhalation of nail dust from onychomycotic toenails. Part I. Characterization of particles. 1984

1992 ◽  
Vol 82 (2) ◽  
pp. 111-115 ◽  
Author(s):  
C Abramson ◽  
J Wilton
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Particle Size ◽  
Total Mass ◽  
Particle Size Analysis ◽  
Dust Particles ◽  
Size Analysis ◽  
Scanning Electron

Nail dust particles were analyzed by scanning electron microscopy for size and topography. The percentage of "fines" that could be inhaled and deposited in the alveoli and bronchioles were determined by quantitative particle size analysis. Distribution representing the largest total mass was graphed between 1 and 2 microns. The authors found that 86% of nail dust would reach the bronchioles and alveoli, and 31% could be expected to deposit in these areas.

Research on the Preparation of Cu-Ni-Al Prealloyed Powders

2013 ◽  
Vol 303-306 ◽  
pp. 2490-2494 ◽  
Author(s):  
Peng Lei ◽  
Jian Chen ◽  
Wei Li ◽  
Yan Jie Ren ◽  
Wei Qiu ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Particle Size ◽  
Phase Composition ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Spherical Particle ◽  
Average Particle Size ◽  
Average Particle ◽  
Scanning Electron

The method of preparation of Cu-Ni-Al prealloyed powders were studied in this paper. Cu, Ni, Al were smelted at 1500°C and N2 was chosen as atomizing media to produce the Cu-Ni-Al prealloyed powders. The morphology and particle size distribution of Cu-Ni-Al prealloyed powders were analysis with Scanning electron microscopy; the phase composition of Cu-Ni-Al prealloyed powders were analysis XRD. The results show that the morphology of Cu-Ni-Al prealloyed powders are almost nearly spherical, particle size distribution is very uniform and the average particle size is 39μm. The powders are composed of Cu and AlNi phase.

scholarly journals Pembuatan Dan Karaterisasi Nanopartikel Ekstrak Etanol Daun Ekor Naga (Rhaphidophora pinnata (L.f.) Schott) Menggunakan Metode Gelasi Ionik

2018 ◽  
Vol 1 (3) ◽  
pp. 029-033
Author(s):  
Dian Ayumi ◽  
Sumaiyah Sumaiyah ◽  
Masfria Masfria
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Particle Size ◽  
Particle Size Distribution ◽  
Surface Structure ◽  
Size Distribution ◽  
Ethanol Extract ◽  
Ionic Gelation ◽  
Particle Size Analyzer ◽  
Scanning Electron

Pengobatan tradisional masih diminati. Salah satu tumbuhannya adalah daun ekor naga (Rhaphidophora pinnata (L.f.) Schott) yang digunakan sebagai obat antikanker dan antibakteri. Penggunaan nanoteknologi dalam sistem penghantaran obat terus diteliti dan dikembangkan. Penelitian ini bertujuan untuk membuat dan mengetahui sifat-sifat nanopartikel ekstrak etanol daun ekor naga (Rhaphidophora pinnata (L.f.) Schott) menggunakan metode gelasi ionik. Ekstrak daun ekor naga dibuat dengan metode maserasi menggunakan pelarut etanol 96%. Nanopartikel dibuat dengan metode gelasi ionik, yaitu menggunakan larutan natrium tripolipospat 0,1% dan kitosan 0,2%, Nanopartikel kemudian dikarakterisasi menggunakan Particle Size Analyzer untuk mengetahui distribusi ukuran partikel dan Scanning Electron Microscopy untuk mengetahui bentuk permukaan partikel. Nanopartikel yang dihasilkan berupa serbuk berwarna coklat muda dengan distribusi ukuran partikel 234,49-1479,50 nm pada perbandingan kitosan 0,2% dan natrium tripolipospat 0,1% (5:1). Bentuk permukaan nanopartikel ekstrak etanol daun ekor naga yaitu tidak rata dan membentuk agregat longgar. Ekstrak etanol daun ekor naga dapat dibuat menjadi nanopartikel dengan kitosan 0,2% dan natrium tripolipospat 0,1% menggunakan metode gelasi ionik.   Traditional medicine is still popular. One of them is ekor naga Leaves (Rhaphidophora pinnata (L.f.) Schott) that has been used as anti-cancer and anti-bacteria. Nanotechnology in drug delivery system is still being studied and developed. This research aimed to prepare and evaluate the characterization of nanoparticle of Ekor Naga Leaves Ethanol Extract (Rhaphidophora pinnata (L.f.) Schott) by Ionic Gelation Method. The Ekor naga leaves extract was prepared by maceration with ethanol 96%. Nanoparticle was prepared by ionic gelation method, using sodium trypholiphosphat 0.1% and chitosan 0.2%, then it was characterized using Particle Size Analyzer to determine particle size distribution and Scanning Electron Microscopy to determine surface structure  particle. The nanoparticle was light brown with particle size distribution of  234.49-1479.50 nm in ratio of chitosan 0.2% and sodium trypholiphosphat 0.1% was 5:1. The surface structure of nanoparticle of ekor naga leaves extract was not smooth and form loose aggregates. The ethanol extract of ekor naga leaves can be prepared into nanoparticle with sodium trypholiphosphat 0.1% and chitosan 0.2% by Ionic Gelation Method

Selective Laser Sintering of Different Powders of Co-Cr-Mo

2014 ◽  
Vol 802 ◽  
pp. 338-342
Author(s):  
Claudinei dos Santos ◽  
Paula Cipriano da Silva ◽  
Luciane Carvalho de Paula ◽  
Alexandre Fernandes Habibe ◽  
Jefferson Fabrício C. Lins ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Particle Size ◽  
Size Distribution ◽  
Cross Section ◽  
Selective Laser Sintering ◽  
Laser Sintering ◽  
X Ray Diffraction ◽  
X Ray ◽  
Scanning Electron

In this work, different commercial Co-Cr-Mo powders were used in selective laser sintering. Commercial powders with particle size distribution between 5 and 50μm were sintered by laser sintering, and characterized. The samples were characterized by X-ray diffraction, indicating Co as the only crystalline phase. Relative density was measured by Archimedes method showing values between 90 and 96% of TD, depending on the powder used. Scanning electron microscopy performed on the cross section of the sintered samples, indicates that the microstructural features are similar, but the surface finish of the samples differ significantly due to the morphology and size distribution of the starting powders used.

Particle Size Analysis of Cotton Dust Using Scanning Electron Microscopy

1977 ◽  
Vol 99 (1) ◽  
pp. 56-60 ◽  
Author(s):  
R. E. Fornes ◽  
M. M. Kleinfelter ◽  
S. P. Hersh
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Particle Size ◽  
Average Particle Size ◽  
Particle Size Analysis ◽  
Dust Particles ◽  
Size Analysis ◽  
Average Particle ◽  
Cotton Dust ◽  
Scanning Electron

Particle size distributions of dusts generated in a model card room and collected on filter media by a vertical elutriator having a particle size cut-off of 15 μm dia have been determined using scanning electron microscopy. Photomicrographs, usually at 3000×, were made of the samples and the particle diameters were estimated by the Martin method. It was found that the average particle size of cotton dust samples measured by this technique was smaller than that reported in the literature obtained by light microscopy. It was also found that the distribution of particle sizes does not follow a simple log-normal distribution unless the smallest particles observed in this study are omitted. A bimodal or perhaps a multimodal distribution yields a better representation of the data. It is concluded that scanning electron microscopy is a practical and accurate method for sizing cotton dust particles on filter surfaces.

A New Image Processing Technique for STEM

1974 ◽  
Vol 32 ◽  
pp. 432-433
Author(s):  
Yasushi Kokubo ◽  
Hirotami Koike ◽  
Teruo Someya
Keyword(s):  
Electron Microscopy ◽  
Image Processing ◽  
Scanning Electron Microscopy ◽  
Elastic Scattering ◽  
Field Emission ◽  
Processing Technique ◽  
Image Processing Technique ◽  
Energy Analyzer ◽  
Scanning Microscope ◽  
Scanning Electron

One of the advantages of scanning electron microscopy is the capability for processing the image contrast, i.e., the image processing technique. Crewe et al were the first to apply this technique to a field emission scanning microscope and show images of individual atoms. They obtained a contrast which depended exclusively on the atomic numbers of specimen elements (Zcontrast), by displaying the images treated with the intensity ratio of elastically scattered to inelastically scattered electrons. The elastic scattering electrons were extracted by a solid detector and inelastic scattering electrons by an energy analyzer. We noted, however, that there is a possibility of the same contrast being obtained only by using an annular-type solid detector consisting of multiple concentric detector elements.

Isolasi Dan Karakterisasi Bentonit Alam Menjadi Nanopartikel Monmorillonit

2018 ◽  
Vol 3 (1) ◽  
pp. 12 ◽  
Author(s):  
Zaimahwati Zaimahwati ◽  
Yuniati Yuniati ◽  
Ramzi Jalal ◽  
Syahman Zhafiri ◽  
Yuli Yetri
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Particle Size ◽  
Surface Morphology ◽  
Average Diameter ◽  
Particle Size Analyzer ◽  
Ft Ir ◽  
Scanning Electron ◽  
Sedimentation Processes

<p>Pada penelitian ini telah dilakukan isolasi dan karakterisasi bentonit alam menjadi nanopartikel montmorillonit. Bentonit alam yang digunakan diambil dari desa Blangdalam, Kecamatan Nisam Kabupaten Aceh Utara.  Proses isolasi meliputi proses pelarutan dengan aquades, ultrasonic dan proses sedimentasi. Untuk mengetahui karakterisasi montmorillonit dilakukan uji FT-IR, X-RD dan uji morfologi permukaan dengan Scanning Electron Microscopy (SEM). Partikel size analyzer untuk menganalisis dan menentukan ukuran nanopartikel dari isolasi bentonit alam. Dari hasil penelitian didapat ukuran nanopartikel montmorillonit hasil isolasi dari bentonit alam diperoleh berdiameter rata-rata 82,15 nm.</p><p><em>In this research we have isolated and characterized natural bentonite into montmorillonite nanoparticles. Natural bentonite used was taken from Blangdalam village, Nisam sub-district, North Aceh district. The isolation process includes dissolving process with aquades, ultrasonic and sedimentation processes.  The characterization of montmorillonite, FT-IR, X-RD and surface morphology test by Scanning Electron Microscopy (SEM). Particle size analyzer to analyze and determine the size of nanoparticles from natural bentonite insulation. From the research results obtained the size of montmorillonite nanoparticles isolated from natural bentonite obtained an average diameter of 82.15 nm.</em></p>

scholarly journals Clay-Based Brick Porosity Estimation Using Image Processing Techniques

2019 ◽  
Vol 29 (1) ◽  
pp. 1226-1234
Author(s):  
Safa Jida ◽  
Hassan Ouallal ◽  
Brahim Aksasse ◽  
Mohammed Ouanan ◽  
Mohamed El Amraoui ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Image Processing ◽  
Scanning Electron Microscopy ◽  
Computer Vision ◽  
Image Processing Techniques ◽  
Processing Techniques ◽  
Porosity Estimation ◽  
Microscopy Images ◽  
Scanning Electron

Abstract This work intends to apprehend and emphasize the contribution of image-processing techniques and computer vision in the treatment of clay-based material known in Meknes region. One of the various characteristics used to describe clay in a qualitative manner is porosity, as it is considered one of the properties that with “kill or cure” effectiveness. For this purpose, we use scanning electron microscopy images, as they are considered the most powerful tool for characterising the quality of the microscopic pore structure of porous materials. We present various existing methods of segmentation, as we are interested only in pore regions. The results show good matching between physical estimation and Voronoi diagram-based porosity estimation.

Microstructure Investigations of Streak Formation in 6063 Aluminum Extrusions by Optical Metallographic Techniques

2013 ◽  
Vol 19 (2) ◽  
pp. 276-284 ◽  
Author(s):  
George Vander Voort ◽  
Beatriz Suárez-Peña ◽  
Juan Asensio-Lozano
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Particle Size ◽  
Hot Extrusion ◽  
Magnesium Silicide ◽  
Precipitation Strengthening ◽  
Surface Appearance ◽  
Aluminum Extrusions ◽  
Extruded Products ◽  
Scanning Electron

AbstractThe present study investigates the effect of the solidification strategy for AA 6063 alloy on the surface appearance of anodized extrusions. The microstructure of the samples was analyzed using both light optical microscopy and scanning electron microscopy. Results show that if heavy segregation occurs from rapid solidification, coarse Mg2Si particles form, thus reducing the potential for precipitation strengthening by the finer β-Mg2Si developed in the solid state. Differentially-strained regions formed during hot extrusion induce differences in particle size for magnesium silicide (Mg2Si) precipitates. Anodizing generates surface roughness due to Mg2Si particle dissolution and AlFeSi decohesion, which is related to both particle size and deformation. During anodizing, an oxide layer forms on the surface of the extruded products, which can lead to streak formation, usually a subject of rejection due to unacceptable heterogeneous reflectivity.

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