scholarly journals CHARACTERISTICS OF FRAGMENTS OF SHELLS AFTER HITTING THE TRIPLEX GLASS OF THE CAR WITH SHOTS FROM A HUNTING "SAIGA" CARBINE UNDER THE CARTRIDGE 5, 45X39

2021 ◽  
Author(s):  
Sergey Leonov
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Foreign Bodies ◽  
Experimental Studies ◽  
Dispersion Analysis ◽  
Energy Dispersion ◽  
X Ray ◽  
Wooden Frame ◽  
Eds Analysis ◽  
Scanning Electron

Abstract. The article is devoted to the possibilities of innovative research methods in forensic medicine-scanning electron microscopy with energy-dispersion analysis. The described methods were used in conducting experimental studies in the case of a gunshot retrograde injury. Aim. The purpose of the work was to study the particles formed during the destruction of a semi-shell shell and an obstacle (triplex car glass) when fired from a hunting Saiga carbine with 5. 45x39 cartridges. Material and methods. Car triplex windshields from BMW and Mercedes-Benz cars were used as a barrier. The shots were fired from a hunting Saiga carbine with a 5.45x39 cartridge. The shots were fired from a distance of 10 m. As targets, white calico with dimensions of 100x150 cm was used, stretched on a wooden frame, or fixed on a chipboard. The distance between the target and the barrier was 100 cm, which roughly corresponded to the distance from the windshield of the car to the driver and the passenger in the front seat. The studies were carried out using the SEM "Hitachi FlexSem1000 II" and the energy-dispersive X-ray spectrometer "Bruker Quantax 80". Results. As a result of the conducted research with the help of microscopy, the presence of 7 types of foreign bodies on the surface of the target was established, which are the products of the destruction of the fire projectile and the barrier: glass fragments; glass fragments; crumbly deposition of glass particles; glass fragments caked with the metal of the projectile; fragments of the projectile; spherical metal particles; overlays of molten metal in the form of puddles. With the help of energy dispersion analysis, it was possible to determine the elemental composition of the particles of the barrier, the fire shell, and to identify the overlap of the target particles. Conclusion. As a result of the experimental study, it was found that the use of SEM and EDS analysis significantly increases the effectiveness and evidence-based expert research in solving the problems of causing damage through the barrier-the windscreen of modern cars. Key words: scanning electron microscopy, gunshot trauma, energy dispersion analysis, fragments of the barrier.

scholarly journals Scanning Electron Microscopy–Energy-Dispersive X-ray Spectrometry (SEM–EDS) Analysis of PM1–2 Microspheres Located in Coal Char Particles with Different Morphologies

2020 ◽  
Vol 34 (7) ◽  
pp. 8848-8856
Author(s):  
Elena V. Fomenko ◽  
Vladimir V. Yumashev ◽  
Sergey V. Kukhtetskiy ◽  
Anatoliy M. Zhizhaev ◽  
Alexander G. Anshits
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Coal Char ◽  
Energy Dispersive ◽  
X Ray ◽  
Eds Analysis ◽  
Scanning Electron

scholarly journals Scanning Electron Microscopy Analysis and Energy Dispersion X-ray Microanalysis to Evaluate the Effects of Decontamination Chemicals and Heat Sterilization on Implant Surgical Drills: Zirconia vs. Steel

2019 ◽  
Vol 9 (14) ◽  
pp. 2837 ◽  
Author(s):  
Antonio Scarano ◽  
Sammy Noumbissi ◽  
Saurabh Gupta ◽  
Francesco Inchingolo ◽  
Pierbiagio Stilla ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Metal Alloy ◽  
Zirconia Ceramic ◽  
Energy Dispersion ◽  
X Ray ◽  
Before And After ◽  
Electron Microscopy Analysis ◽  
Indispensable Tool ◽  
Scanning Electron

Background: Drills are an indispensable tool for dental implant surgery. Today, there are ceramic zirconium dioxide and metal alloy drills available. Osteotomy drills are critical instruments since they come in contact with blood and saliva. Furthermore, they are reusable and should be cleaned and sterilized between uses. Depending on the material, sterilizing agents and protocols can alter the surface and sharpness of implant drills. The hypothesis is that cleaning and sterilization procedures can affect the surface structure of the drills and consequently reduce their cutting efficiency. Methods: Eighteen zirconia ceramic drills and eighteen metal alloy drills were evaluated. Within the scope of this study, the drills were not used to prepare implant sites. They were immersed for 10 min in human blood taken from volunteer subjects and then separately exposed to 50 cycles of cleansing with 6% hydrogen peroxide, cold sterilization with glutaraldehyde 2%, and autoclave heat sterilization. Scanning Electron Microscopy (SEM) and energy dispersion X-ray (EDX) microanalysis were conducted before and after each cycle and was used to evaluate the drill surfaces for alterations. Results: After exposure to the cleansing agents used in this study, alterations were seen in the steel drills compared to zirconia. Conclusions: The chemical sterilization products used in this study cause corrosion of the metal drills and reduce their sharpness. It was observed that the cycles of steam sterilization did not affect any of the drills. Zirconia drill surfaces remained stable.

The Analysis of Morphology Characteristics of Iron Plaque on the Roots of Carex cinerascens

2014 ◽  
Vol 675-677 ◽  
pp. 140-144
Author(s):  
Chun Ying Liu ◽  
Xiao Feng Gong ◽  
Ju Yun Yang
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Chemical Properties ◽  
Amorphous Coating ◽  
X Ray ◽  
Eds Analysis ◽  
Physico Chemical ◽  
Root Surfaces ◽  
Morphology Characteristics ◽  
Scanning Electron

The physico-chemical properties of iron plaques formed on the root surfaces ofCmarex cinerascensunder laboratory conditions were determined using Scanning Electron Microscopy (SEM) and Energy Dispersive X-Ray Spectrometry (EDS) analysis. Iron plaques were present as an amorphous coating on root surfaces with an uneven distribution. EDS analysis showed that iron plaques were composed of Fe , Si, Al and lesser amounts of Ca in plaqued root surfaces.

scholarly journals Influence of Bi2O3 on sintering and crystallization of cordierite ceramics

2005 ◽  
Vol 37 (3) ◽  
pp. 189-197 ◽  
Author(s):  
N. Djordjevic
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Liquid Phase ◽  
Binary Systems ◽  
X Ray Diffraction ◽  
X Ray ◽  
Eds Analysis ◽  
Cordierite Ceramics ◽  
Scanning Electron

The influence of Bi2O3 on the process of cordierite ceramics preparation, 2MgO-2Al2O3-5SiO2 (MAS) was investigated. The following binary systems were used for the presented research: MgO/Bi2O3 (sintered at 820?C and 1100?C), Al2O3/Bi2O3 and SiO2/Bi2O3 (sintered at 1100?C). The composition of these systems consisted of 80% of oxide and 20% Bi2O3. The effects of sintering, composition and morphology were investigated by X-ray diffraction, scanning electron microscopy and EDS analysis. It has been found that Bi2O3, besides a liquid phase, forms intermediary unstable compounds with MgO and Al2O3. MAS ceramics were sintered with 10% Bi2O3 at 1000?C, 1100?C and 1200?C. .

Scanning electron microscopy and X-ray microanalysis of foreign bodies associated with silastic implants in humans

Contraception ◽  
1983 ◽  
Vol 28 (6) ◽  
pp. 543-552 ◽  
Author(s):  
Arthur H. Tatum ◽  
John D. Shelburne ◽  
Peter Ingram ◽  
Dale N. Robertson ◽  
Horacio B. Croxatto ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Foreign Bodies ◽  
X Ray ◽  
Scanning Electron

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.

Scanning Electron Microscopy and X-Ray Analyses of Dental Tissues from a Hibernator

1976 ◽  
Vol 34 ◽  
pp. 178-179
Author(s):  
M. L. Zimny ◽  
A. C. Haller
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Body Temperature ◽  
Ground Squirrel ◽  
Alveolar Bone ◽  
X Ray ◽  
Dental Tissues ◽  
Bone Minerals ◽  
Apical Tooth ◽  
Scanning Electron

During hibernation the ground squirrel is immobile, body temperature reduced and metabolism depressed. Hibernation has been shown to affect dental tissues varying degrees, although not much work has been done in this area. In limited studies, it has been shown that hibernation results in (1) mobilization of bone minerals; (2) deficient dentinogenesis and degeneration of alveolar bone; (3) presence of calculus and tears in the cementum; and (4) aggrevation of caries and pulpal and apical tooth abscesses. The purpose of this investigation was to study the effects of hibernation on dental tissues employing scanning electron microscopy (SEM) and related x-ray analyses.

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