scholarly journals Influence of α-Bi2O3 chemical prehistory on the morphology of the obtaining basic bismuth succinate

2021 ◽  
Vol 340 ◽  
pp. 01020
Author(s):  
Liubov Afonina ◽  
Evgeniya Timakova
Keyword(s):  
Electron Microscopy ◽  
Particle Size ◽  
Grain Size ◽  
Grain Size Analysis ◽  
Size Analysis ◽  
Medical Applications ◽  
Antibacterial Drug ◽  
Chemical Analyses ◽  
Monoclinic Modification ◽  
X Ray

The antibacterial drug, basic bismuth succinate of the composition Ñ2Í4(ÑÎÎBiO)2 is shown to obtain expediently by the interaction of bismuth oxide α-Bi2O3 with a succinic acid solution. Using the method of electron microscopy the influence of the chemical prehistory of obtaining the precursor, monoclinic modification of α-Bi2O3, on the morphological features of basic bismuth succinate synthesized from it has been investigated. The composition of Ñ2Í4(ÑÎÎBiO)2 was confirmed by the data of X-ray phase and chemical analyses. Based on the data of grain size analysis, the particle size of the obtained samples of basic bismuth succinate was estimated and the conditions for the synthesis of fine-crystalline C2H4(COOBiO)2, which is necessary for medical applications, were selected.

scholarly journals Investigation of Particle Size Distribution for Fine-Grained Soil Using a Grain Size Analysis Equipment Automated by X-ray Method

2000 ◽  
Vol 40 (2) ◽  
pp. 127-133
Author(s):  
Yukio Furukawa ◽  
Tatsushi Fujita ◽  
Tadayuki Kunihiro ◽  
Hisashi Tsuchiya ◽  
Yukio Saito
Keyword(s):  
Particle Size ◽  
Grain Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Grain Size Analysis ◽  
Size Analysis ◽  
Ray Method ◽  
X Ray ◽  
Fine Grained ◽  
Fine Grained Soil

The Evaporative Decomposition of Solutions Method (Eds) for the Production of Ultrafine Y1Ba2Cu3O7 from Nitrate and Mixed Anion Precursor Solutions

1989 ◽  
Vol 169 ◽  
Author(s):  
Rollin E. Lakis ◽  
Sidney R. Butler
Keyword(s):  
Electron Microscopy ◽  
Particle Size ◽  
Barium Carbonate ◽  
Hollow Spheres ◽  
Particle Size Analysis ◽  
Size Analysis ◽  
Gravimetric Analysis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron

AbstractY1Ba2Cu3O7 has been prepared by the evaporative decomposition of solutions method. Nitrate and mixed anion solutions were atomized and decomposed at temperatures ranging from 300°C to 950°C. The resulting materials have been characterized using x-ray powder diffraction, Thermal Gravimetric Analysis (TGA), particle size analysis, Scanning Electron Microscopy (SEM), and Transmission Electron Microscopy (TEM). The powder consists of 0.3 micron agglomerated hollow spheres with a primary particle size of 0.06 micron. TGA and x-ray diffraction indicate the presence of barium nitrate and barium carbonate due to incomplete decomposition and/or product contamination by the process environment.

scholarly journals Synthesis of ZnO-CdO Nanocomposites

2013 ◽  
Vol 1 (1) ◽  
pp. 11-14
Author(s):  
N. Sahu ◽  
◽  
R. K. Duchaniya ◽  
Keyword(s):  
Particle Size ◽  
Grain Size ◽  
Low Cost ◽  
Sol Gel ◽  
Particle Size Analysis ◽  
Synthesis Process ◽  
Size Analysis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Scanning Electron

The ZnO-CdO nanocomposite was prepared by sol-gel method by using their respective nitrates. It is a simple and low cost method to prepare nanocomposites. The drying temperature and drying period of prepared gel was varied during the synthesis process. The prepared samples were characterized by using scanning electron microscope (SEM), particle size analysis (PSA), X-ray diffraction (XRD) and photoluminescence spectroscopy (PL) to get surface morphology, idea of getting particle of nanosized range so that further characterizations can be done, to study the optical property of synthesized nanocomposite and measure the band gap . The grain size determined by Scherrer’s formula was found to be between 30-50 nm.

scholarly journals The validity of laser diffraction system to reproduce hydrometer results for grain size analysis in geotechnical applications

PLoS ONE ◽  
2021 ◽  
Vol 16 (1) ◽  
pp. e0245452
Author(s):  
Hamzah M. Beakawi Al-Hashemi ◽  
Omar S. Baghabra Al-Amoudi ◽  
Zain H. Yamani ◽  
Yassir M. Mustafa ◽  
Habib-ur-Rehman Ahmed
Keyword(s):  
Electron Microscopy ◽  
Grain Size ◽  
Image Analysis ◽  
Size Distribution ◽  
Digital Image ◽  
Digital Image Analysis ◽  
Laser Diffraction ◽  
Grain Size Analysis ◽  
Size Analysis ◽  
Distribution Method

The grain size analysis plays a significant role in any geotechnical study. The grain size analysis, by means of sieving, is usually used for coarse material of particle size > 75 μm. For the fine material; the sedimentation methods are frequently adopted (e.g., hydrometers). Other methods also exist such as electron microscopy, digital image analysis and laser diffraction. The fine geomaterials commonly undergo agglomeration which makes the recognition of individual grain size using digital image analysis or electron microscopy challenging. To facilitate and enhance the grain-size analysis, this study was conducted using the Laser Diffraction System (LDS). Seven samples with different nature (composition and texture) and sources were analyzed by hydrometer and LDS. For LDS, various factors were studied such as air pressure, sonication, dilution, refractive index, and distribution method (volume or number). The results were compared qualitatively and quantitatively based on soil classification systems, fractal dimensions, and other parameters. Furthermore, this study provided a novel criterion to determine which LDS distribution method (volume or number) is to be used depending on the Liquid Limit. A combined sieve-LDS system is recommended to obtain the entire grain size distribution. It is concluded that the LDS is a viable technique that can replace the time-consuming hydrometer method to assess the grain-size distribution.

Stratigraphic effects of tubificids in freshwater sediments: a kinetic study based on X-ray images and grain-size analysis

2006 ◽  
Vol 30 (2) ◽  
pp. 228-237 ◽  
Author(s):  
Aurélie Ciutat ◽  
Olivier Weber ◽  
Magali Gérino ◽  
Alain Boudou
Keyword(s):  
Grain Size ◽  
Kinetic Study ◽  
Grain Size Analysis ◽  
Size Analysis ◽  
Freshwater Sediments ◽  
X Ray

Soil Particle Size Analysis Using X-Ray Absorption

1996 ◽  
Vol 1548 (1) ◽  
pp. 51-59 ◽  
Author(s):  
Stanley J. Vitton ◽  
Carl C. Nesbitt ◽  
Leon Y. Sadler
Keyword(s):  
Particle Size ◽  
Grain Size ◽  
Size Range ◽  
Particle Size Analysis ◽  
Size Analysis ◽  
Size Distributions ◽  
X Ray ◽  
Grain Size Distributions ◽  
X Ray Absorption ◽  
Representative Samples

The hydrometer method is the standard method of grain size analysis used in geotechnical engineering. Although the hydrometer method provides accurate grain size distributions and is relatively easy to conduct, it takes a minimum of 2 days to complete and is subject to operator error. In studies where small-magnitude changes or more rapid results are required, an alternative method to hydrometer testing is to use an automated particle size analysis instrument employing X-ray absorption. This technique passes a finely collated X-ray beam through a suspension of settling particle in a fluid. Because the intensity of the X-ray is directly related to the percentage mass of soil in a suspension, Stokes' law can be used to calculate the grain size distribution of a soil assuming an equivalent particle diameter for the soil grains. X-ray absorption has been found to produce accurate grain size distributions in the 75 μm to 1 μm size range when sample preparation adheres to AASHTO T88-90 specifications and suspension concentrations are approximately 2 percent by volume. Testing for particles sizes down to 1 μm takes approximately 20 min per sample. Technical concerns remaining involve obtaining representative samples of the soil in the 75 μm, to 1 μm size range suspension for testing. One method being evaluated is injection flow analysis, which is an inexpensive method of obtaining representative samples used with a variety of inorganic, industrial, and environmental materials in which direct sampling of fluid is required.

scholarly journals Grain-Size Distribution and Structural Characteristics of Varved Sediments from Lake Żabińskie (Northeastern Poland)

Quaternary ◽  
2019 ◽  
Vol 2 (1) ◽  
pp. 8 ◽  
Author(s):  
Maurycy Żarczyński ◽  
Jacek Szmańda ◽  
Wojciech Tylmann
Keyword(s):  
Particle Size ◽  
Grain Size ◽  
Layer Thickness ◽  
Grain Size Analysis ◽  
Size Analysis ◽  
Size Distributions ◽  
Particle Size Distributions ◽  
Grain Size Distributions ◽  
Northeastern Poland ◽  
Size Data

Typically, the description of varve microfacies is based on microscopic sedimentary structures, while standard grain-size analysis is commonly applied with lower resolution. Studies involving a direct comparison of varve microfacies and particle-size distributions, common for clastic environments, are scarce for biogenic varves. In this study, we analyzed nine-year resolution grain-size data from Lake Żabińskie (northeastern Poland) to detect differences between varve microfacies. Six varve microfacies were differentiated using grain-size distributions and sedimentological attributes (calcite layer thickness, dark layer thickness, mass accumulation rate). However, changes in particle-size distributions between different varve types are relatively small and indicate a similar source for the material deposited. Decomposition of grain-size distributions with the end-member approach allows recognition of relative changes for the deposition of allochthonous (mineral) and autochthonous (carbonates, (hydr)oxides) components. Grain-size data suggest that sources of allochthonous material remained constant, while varve formation was controlled mostly by in-lake processes.

Characterization of Atmosphere PM2.5 and Dustfall in Xining (China)

2013 ◽  
Vol 562-565 ◽  
pp. 1422-1427 ◽  
Author(s):  
Jun Tang ◽  
Fa Qin Dong ◽  
Qun Wei Dai ◽  
Yue Quan Deng
Keyword(s):  
Particle Size ◽  
Grain Size ◽  
Elemental Composition ◽  
Size Distribution ◽  
Grain Size Analysis ◽  
Size Analysis ◽  
Mineral Phase ◽  
Three Samples ◽  
Particle Size Analyzer

In this paper, mineral phase, elemental composition and size distribution were analysed by means of XRD, XRF and laser particle size analyzer respectively. According to the results of XRD, quartz, illite, calcite and albite were all found in three samples; Dolomite was found only in dustfall; Clinochlore was existed in both PM2.5 and soil. From the results of XRF, elemental compositon of three samples were focused on elemental Na, Si, Al, S, Ca, Fe, Mg, K. Based on the grain size analysis, the size distribution of dustfall mainly ranges from 1µm to 40µm.

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