Treatment on Coconut Shell to Improve its Quality for Use as Coarse Aggregate

2021 ◽  
Vol 1030 ◽  
pp. 94-102
Author(s):  
T. Thilagashanthi ◽  
K. Gunasekaran ◽  
K.S. Satyanarayanan
Keyword(s):  
Coarse Aggregate ◽  
Ferrous Sulphate ◽  
Coconut Shell ◽  
Electron Microscopic ◽  
Sem Images ◽  
Different Types ◽  
Scanning Electron Microscopic ◽  
Imagej Software ◽  
Scanning Electron

To improve the quality of coconut shell (CS) to use as coarse aggregate different treatment methods are given to CS. Polyvinyl alcohol (PVA) and ferrous sulphate (FS) were used as materials for treating the CS. Ten different types of treatments were considered from raw CS to treat with PVA and FS. Significant reduction of water absorbing quality on CS was found from the different types of treatment given. Scanning electron microscopic (SEM) images were also taken and analyzed. SEM images obtained are exported into the software called ImageJ and analyzed in two different ways: one way is using 8 bits and other way is called RGB. An extract from the ImageJ software is given to support the results of treated CS aggregates. If the CS aggregates are treated, then no doubt that the water absorbing capacity of CS can be reduced.

scholarly journals Automated analysis of scanning electron microscopic images for assessment of hair surface damage

2020 ◽  
Vol 7 (1) ◽  
pp. 191438 ◽  
Author(s):  
Fanny Chu ◽  
Deon S. Anex ◽  
A. Daniel Jones ◽  
Bradley R. Hart
Keyword(s):  
Chemical Weathering ◽  
Quantitative Measure ◽  
Surface Damage ◽  
Morphological Features ◽  
Damage Classification ◽  
Electron Microscopic ◽  
Sem Images ◽  
Scanning Electron Microscopic ◽  
Hair Surface ◽  
Scanning Electron

Mechanical damage of hair can serve as an indicator of health status and its assessment relies on the measurement of morphological features via microscopic analysis, yet few studies have categorized the extent of damage sustained, and instead have depended on qualitative profiling based on the presence or absence of specific features. We describe the development and application of a novel quantitative measure for scoring hair surface damage in scanning electron microscopic (SEM) images without predefined features, and automation of image analysis for characterization of morphological hair damage after exposure to an explosive blast. Application of an automated normalization procedure for SEM images revealed features indicative of contact with materials in an explosive device and characteristic of heat damage, though many were similar to features from physical and chemical weathering. Assessment of hair damage with tailing factor, a measure of asymmetry in pixel brightness histograms and proxy for surface roughness, yielded 81% classification accuracy to an existing damage classification system, indicating good agreement between the two metrics. Further ability of the tailing factor to score features of hair damage reflecting explosion conditions demonstrates the broad applicability of the metric to assess damage to hairs containing a diverse set of morphological features.

scholarly journals Preparation and Properties of Thermoplastic Starch/Bentonite Nanocomposites

2017 ◽  
Vol 885 ◽  
pp. 129-134 ◽  
Author(s):  
László Lendvai ◽  
Ákos Kmetty ◽  
József Karger-Kocsis
Keyword(s):  
Thermoplastic Starch ◽  
Test Results ◽  
Maize Starch ◽  
Screw Extruder ◽  
Electron Microscopic ◽  
Sem Images ◽  
Scanning Electron Microscopic ◽  
Twin Screw ◽  
Thermal Stability Of ◽  
Scanning Electron

Thermoplastic starch (TPS)/bentonite nanocomposites containing up to 7.5 wt.% bentonite were prepared. Maize starch was plasticized with glycerol and water, in presence or absence of bentonite, in a twin-screw extruder. Mechanical, morphological and thermal properties of the TPS/bentonite nanocomposites were determined and discussed. Scanning electron microscopic (SEM) images revealed a good dispersion of bentonite particles with some remaining agglomerates in the range of 0.1 to 1.5 μm. According to the tensile test results the tensile strength and Young’s modulus increased significantly with increasing bentonite content, however, at cost of elongation. Thermogravimetric analysis (TGA) showed that the presence of bentonite exerted little to no effect on the thermal stability of TPS.

Amelogenesis imperfecta: a scanning electron microscopic and histopathologic study

2002 ◽  
Vol 26 (4) ◽  
pp. 327-335 ◽  
Author(s):  
Figen Seymen ◽  
Basak Kiziltan
Keyword(s):  
Primary Teeth ◽  
Microscopic Investigation ◽  
Electron Microscopic Investigation ◽  
Amelogenesis Imperfecta ◽  
Pulp Tissue ◽  
Electron Microscopic ◽  
Different Types ◽  
Scanning Electron Microscopic ◽  
Hereditary Defect ◽  
Scanning Electron

Amelogenesis imperfecta (AI) is a hereditary defect in enamel formation affecting both primary and permanent dentition. Scanning electron microscopic investigation is one of the most effective methods in diagnosing and identifying the type of amelogenesis imperfecta. The aim of this study was to investigate the ultrastructure of different types of amelogenesis imperfecta enamel. The primary teeth of three children with AI aged 4, 10 and 11-years-old were studied by scanning electron microscopy and irregular enamel, irregularities in enamel crystallites, hypoplastic areas on the enamel surface were seen. Histopathological evaluation revealed predentin areas with irregular canaliculi between normal dentin and internal resorption areas in the pulp tissue. Conclusively, in amelogenesis imperfecta, enamel tissue is mostly affected besides minor defects in dentinal and pulpal tissue.

A revision of the taxonomy of Aphelenchoides stammeri Körner, 1954 (Rhabditida: Aphelenchoididae) and proposal for a new genus

Nematology ◽  
2020 ◽  
pp. 1-14
Author(s):  
Jianfeng Gu ◽  
Lele Liu ◽  
Joaquín Abolafia ◽  
Majid Pedram
Keyword(s):  
New Genus ◽  
Morphological Characters ◽  
The Body ◽  
Mitochondrial Cytochrome ◽  
Electron Microscopic ◽  
Sem Images ◽  
Scanning Electron Microscopic ◽  
The Status ◽  
Phylogenetic Affinities ◽  
Scanning Electron

Summary During the present study, Aphelenchoides stammeri was recovered from pine packaging wood imported from Spain to China (isolate 3334), and was also later found in China (isolate CN24). The first population (3334) was characterised by 912-1075 μm long females and 803-983 μm long males, a rounded elevated and offset lip region separated from the rest of the body by a sharp constriction having fine annuli in scanning electron microscopic (SEM) images, 14.0-19.3 μm long well-sclerotised stylet with a wide lumen (especially in the shaft) and small basal swellings, its conus forming ca 40% of the total length, the metacorpus with well-sclerotised and large central or slightly postcentral valve plates, vulva with no flap, functional rectum and anus, dorsally convex, ventrally bent conical tail (c’ = 3.3-4.3), males common with aphelenchoidid-type spicules having an elongate condylus with wide bluntly rounded end, a blunt rostrum and simple end, and seven precloacal + cloacal + caudal papillae. The SEM data of the studied Spanish population, the detailed light microscopic (LM) observations on previously reported populations and detailed studies of a cultured population from Germany, yielded new observations, supporting the status of this species as an independent genus. The phylogeny of the new genus was investigated using four markers, viz., small and large (SSU, LSU D2-D3), internal transcribed spacer1 (ITS) rDNA, and mitochondrial cytochrome c oxidase 1 (COI mtDNA) genes. Potensaphelenchus n. gen. is proposed for the species and it is placed under the Parasitaphelenchinae based upon its morphological characters and phylogenetic affinities. The diagnostics of the new genus and its relationships with similar aphelenchoidid genera are discussed. Seinura lii is proposed as new junior synonym of Potensaphelenchus stammeri n. gen., n. comb.

scholarly journals Scanning electron microscopic and profilometric study of different sharpening stones

2006 ◽  
Vol 17 (3) ◽  
pp. 237-242 ◽  
Author(s):  
Roberto Antonio Andrade Acevedo ◽  
Ana Karina Veloso Cardozo ◽  
José Eduardo César Sampaio
Keyword(s):  
Root Surface ◽  
Scaling And Root Planing ◽  
Electron Microscopic ◽  
Periodontal Health ◽  
Cutting Angle ◽  
Root Planing ◽  
Scanning Electron Microscopic ◽  
Scanning Electron

Scaling and root planing contribute to the recovery of periodontal health. All periodontal instruments loose their fine cutting angle after use. To maintain this angle, correct sharpening is required using specifically designed stones. The characteristics of sharpening stones can be compared to the blade of the instruments and also transported to root surface during instrumentation. Root smoothness is related to the quality of the blade. Therefore, the purpose of this study was to evaluate the characteristics of 9 sharpening stones by scanning electron microscopic and profilometric analyses. Ceramic and Neumar stones were very fine and both may be recommended to maintain the sharpness of the instruments. Arkansas, Thompson and CE stones presented greater roughness with very regular and round particles, and are suitable for maintenance of the cutting angle. In addition, these stones may be indicated for the routine sharpening of the instruments that are partly dull. Oxide Aluminum, Carborundum and JON stones were the coarsest with large irregular particles and may be indicated for initial sharpening of totally dull instruments with completion of sharpening with finer stones.

scholarly journals Additional morphological notes on the male of Icius alboterminus (Caleb, 2014) (Aranei: Salticidae) with new distribution records from India

2020 ◽  
Vol 12 (4) ◽  
pp. 15475-15480 ◽  
Author(s):  
Dhruv A. Prajapati ◽  
R.D. Kamboj
Keyword(s):  
Reproductive Organ ◽  
Morphological Description ◽  
Electron Microscopic ◽  
Sem Images ◽  
Scanning Electron Microscopic ◽  
New Distribution ◽  
Scanning Electron

This paper includes additional detailed characters and new distribution records of the male of Icius alboterminus (Caleb, 2014) from India.  A detailed morphological description based on scanning electron microscopic (SEM) images and illustrations of the reproductive organ are provided.

Scanning electron microscopic investigation of different types of necroses in potato tubers

Food Control ◽  
2005 ◽  
Vol 16 (8) ◽  
pp. 747-752 ◽  
Author(s):  
W. Błaszczak ◽  
M. Chrzanowska ◽  
J. Fornal ◽  
E. Zimnoch-Guzowska ◽  
M.C. Palacios ◽  
...  
Keyword(s):  
Microscopic Investigation ◽  
Electron Microscopic Investigation ◽  
Potato Tubers ◽  
Electron Microscopic ◽  
Different Types ◽  
Scanning Electron Microscopic ◽  
Scanning Electron

scholarly journals InP nanowires quality control using SEM and Raman spectroscopy

2016 ◽  
Vol 34 (4) ◽  
pp. 851-855
Author(s):  
K. Grodecki ◽  
E. Dumiszewska ◽  
M. Romaniec ◽  
W. Strupinski
Keyword(s):  
Raman Spectroscopy ◽  
Low Energy ◽  
Crystal Quality ◽  
Full Width ◽  
Half Maximum ◽  
Sem Images ◽  
Different Types ◽  
Si Doped ◽  
Scanning Electron

AbstractThree different types of samples of InP nanowires, i.e. undoped, doped with Si and doped with Te, were grown and measured using SEM and Raman spectroscopy. Scanning Electron Microscope (SEM) images showed differences in the length, homogeneity and curvature of the nanowires. The most homogenous wires, grown most perpendicular to the surface, were those Si doped. They were also the shortest. Raman spectroscopy showed that the nanowires doped with Si had the lowest Full Width at Half Maximum (FWHM) TO band, which suggests the highest crystal quality of these wires. For the wires doped with Te, which were the most inhomogeneous, a low energy acoustic band was also observed, which suggests the lowest crystal quality of these structures.

Scanning Electron Microscopic Study of the Cell Surface

1969 ◽  
Vol 27 ◽  
pp. 36-37 ◽  
Author(s):  
Toichiro Kuwabara
Keyword(s):  
Tissue Fluid ◽  
Biological Application ◽  
Biological Structure ◽  
Electron Microscopic ◽  
Surface Appearance ◽  
Minute Amount ◽  
Scanning Electron Microscopic Study ◽  
Scanning Electron Microscopic ◽  
True Structure ◽  
Scanning Electron

Although scanning electron microscopy has a great potential in biological application, there are certain limitations in visualization of the biological structure. Satisfactory techniques to demonstrate natural surfaces of the tissue and the cell have been reported by several investigators. However, it is commonly found that the surface cell membrane is covered with a minute amount of mucin, secretory substance or tissue fluid as physiological, pathological or artefactual condition. These substances give a false surface appearance, especially when the tissue is fixed with strong fixatives. It seems important to remove these coating substances from the surface of the cell for demonstration of the true structure.

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