Particulate Distribution

2019 ◽  
pp. 161-183
Author(s):  
Peter George Martin
Keyword(s):  
Particulate Distribution

scholarly journals Polyribosomal and particulate distribution of lysyl- and phenylalanyl-transfer ribonucleic acid synthetases

1974 ◽  
Vol 143 (1) ◽  
pp. 191-195 ◽  
Author(s):  
Gale Moline ◽  
Arnold Hampel ◽  
M. Duane Enger
Keyword(s):  
Chinese Hamster Ovary Cells ◽  
Chinese Hamster ◽  
Trna Synthetase ◽  
Differential Sensitivity ◽  
Synthetase Activity ◽  
Ribosomal Subunits ◽  
Ovary Cells ◽  
Trna Synthetases ◽  
Aminoacyl Trna Synthetases ◽  
Particulate Distribution

1. Only two aminoacyl-tRNA synthetases from Chinese hamster ovary cells are found associated with ribosomes and polyribosomes. 2. Phenylalanyl-tRNA synthetase activity is found with the 60S subunit, 80S monoribosome and individual polyribosomes. An additional 15S form of the enzyme is also seen. 3. Lysyl-tRNA synthetase activity is found in a form of about 20S and associated with ribosomal subunits and polyribosomes. The ribosomal subunits having lysyl-tRNA synthetase activity are about 6S larger than the bulk of the ribosomal subunits. 4. The lysyl- and phenylalanyl-tRNA synthetases found in different complexes have differential sensitivity to EDTA and centrifugation properties.

Optimisation of SiC Particulate Distribution in Reinforced Al-Si-based Composites

Cast Metals ◽  
1991 ◽  
Vol 4 (3) ◽  
pp. 122-128 ◽  
Author(s):  
M. Gallerneault ◽  
R. W. Smith
Keyword(s):  
Particulate Distribution

Numerical simulation of mold filling and particulate flow of A356/SiCp indirect squeeze casting

2016 ◽  
Vol 54 (12) ◽  
pp. 1593-1602
Author(s):  
Qiyao Hu ◽  
Haidong Zhao ◽  
Han Long ◽  
Puyun Dong ◽  
Gang Zhu
Keyword(s):  
Distribution Patterns ◽  
Mold Filling ◽  
Particulate Flow ◽  
Image Analysis System ◽  
Matrix Composites ◽  
Analysis System ◽  
Particulate Distribution ◽  
Particulate Reinforced ◽  
Acceptable Agreement ◽  
Digital Image Analysis System

In this investigation, a mathematical model based on the dispersed phase model and multiphase flow principle was introduced, and applied to simulate the mold filling and particulate flow of particulate reinforced metal matrix composites casting. Experiments of spiral-square shaped indirect squeeze castings of A356/50 µm SiCp were conducted to validate the established model. The SiCp fractions in the casting different locations were quantitatively measured with micro digital image analysis system and were compared with the simulation results. It was found that particulate fractions and distribution patterns at different locations were quite different along the filling distance. The experimental and simulated results about the SiCp distribution in the castings show acceptable agreement. Further, the effect of fluid flow and particulate trajectories on the particulate distribution was analyzed and discussed. The research has shown the validity of application of the model for practical particulate reinforced Al-based composites casting.

Radiation Shielding Characteristics of Concretes Incorporates Different Waste Materials

2013 ◽  
Vol 594-595 ◽  
pp. 1015-1019
Author(s):  
Ali Basheer Azeez ◽  
Kahtan S. Mohammed ◽  
Abdullah Mohd Mustafa Al Bakri ◽  
Hana Ihsan Hasan
Keyword(s):  
Attenuation Coefficient ◽  
Energy Levels ◽  
Radiation Shielding ◽  
Shielding Effect ◽  
Waste Materials ◽  
Linear Attenuation Coefficient ◽  
Radioactive Elements ◽  
Radiation Sources ◽  
The Mean ◽  
Particulate Distribution

Samples of concrete incorporate different waste materials such as iron filings, iron balls of used ball bearings and slags from steel industry were assessed for their anti-radiation attenuation coefficient properties. The attenuation measurements were performed using gamma spectrometer of NaI (Tl) detector. The utilized radiation sources comprised Cs137and Co60radioactive elements with photon energies of o.662 MeV for Cs137and two1.17 and 1.33 MeV energy levels for the Co60. Likewise the mean free paths for the tested samples were obtained. The maximum linear attenuation coefficient values of 0.92±1.12×10-3for CS137and 1.12±1.57×10-3for CO60attained, in this study were for concrete incorporate iron filling wastes of 30 wt. %. The iron balls and the steel slags gave much inferior values. The concrete incorporates iron filings provided the best shielding effect. The microstructure, concretefillings composite density, the homogeneity and particulate distribution were examined and evaluated using different metallographic, microscopic and measurement facilities.

Corrigendum to: Wildland fire ash and particulate distribution in adjacent residential areas

2014 ◽  
Vol 23 (4) ◽  
pp. 601
Author(s):  
Richard L. Wade ◽  
Amir Jokar ◽  
Kristina Cydzik ◽  
Adam Dershowitz ◽  
Rod Bronstein
Keyword(s):  
Heavy Metals ◽  
Forest Management ◽  
Aromatic Hydrocarbons ◽  
Wildland Fire ◽  
Residential Buildings ◽  
Wood Ash ◽  
Polynuclear Aromatic Hydrocarbons ◽  
Residential Areas ◽  
Fire Zone ◽  
Particulate Distribution

In recent decades, the frequency of wildland fire incidents near residential areas has decreased but the number of acres burned has increased, in large part due to changes in forest management methods and further human encroachment in forested regions. There is much debate about whether the wood ash generated by these wildfires can significantly affect residential buildings outside the fire zone perimeter. This study investigates the distribution of ash, soot and char that are generated from wildfires and migrate into adjacent residential regions. For this purpose, a wildland fire in Bastrop, Texas, was studied with samples collected from a variety of locations within the fire site and in adjacent areas. The collected samples were assayed for pH, asbestos, heavy metals and polynuclear aromatic hydrocarbons. The results of this investigation showed that the magnitude of the deposition on residential buildings near wildfires is dependent on a variety of variables, in particular the distance from the centre of the fire.

Experimental Study of a Solid-Gas Jet Issuing Into a Transverse Stream

1978 ◽  
Vol 100 (3) ◽  
pp. 333-338 ◽  
Author(s):  
R. N. Salzman ◽  
S. H. Schwartz
Keyword(s):  
Experimental Study ◽  
Experimental Investigation ◽  
Single Phase ◽  
Gas Jet ◽  
Plume Dispersion ◽  
Correlation Equations ◽  
Mass Ratio ◽  
Air Mass ◽  
Air Jet ◽  
Particulate Distribution

The results of an experimental investigation of the trajectory and dispersion of a solid-gas (silicate-air) jet injected into a transverse stream are presented. The centerline and the spread of the jet were defined by the particulate distribution as sampled with an isokinetic probe. The jets of this study had a solid to air mass ratio on the order of 15:1. Correlation equations obtained for the trajectory are similar to those reported in the literature for single phase jets. Equations are also obtained for plume dispersion.

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