pores/porosity
The Effect of Nonspherical Pores and Multiple Scattering on the Ultrasonic Characterization of Porosity
... Consequently, pores with any other convex shape will increase the attenuation in the high frequency limit; the increase being proportional to the ratio of the pore's surface area to that[r] ...
6
Analogizing of Convention Fusion Welding Processes with Solid-State Welding Technique
... 1) Porosity: Porosity is gas pores found in the solidified weld bead. These pores are generally distributed in a random manner. Pores can occur either under or on the weld surfa[r] ...
5
Effects of Tool Rotating Rate and Pass Number on Pore Structure of A6061 Porous Aluminum Fabricated by Using Friction Stir Processing
... the porosity and pore structure of A6061 porous aluminum are ...high porosity and high quality ...spherical pores), the tool rotating rate should be approximately from 1000 to 2200 rpm when the ...
6
Examining the effect of pore size distribution and shape on flow through unsaturated peat using computed tomography
... (air-filled pores) from the solid matrix (organic material and water), a new neighbourhood- based standard deviation thresholding algorithm (Elliot and Heck, 2007) was applied for CT images at specific head lev- ...
10
Catalytically Graphitized Electrospun Carbon Nanofibers Adorned with Nickel Nanoparticles for Catalysis Applications
... (with porosity of more than 90% [19]) along with the surface area of fine Ni nanoparticles and existence of tiny pores in the bulk and surface of GNFs, due to the evaporation of organic parts during heat ...
6
NEW PATENTS: July 1989149-160
... glass membrane of specified porosity carrying TiO, and a platinum group metal in its pores. T h e catalyst is used for removing cyanide, dichromate and organic compounds[r] ...
12
Permeability in Rotliegend gas sandstones to gas and brine as predicted from NMR, mercury injection and image analysis
... with porosity and pore size is derived for a porous medium with a homogeneous pore size, whereas the pore sizes in tight sandstones can range from nm to ...which pores control permeability to gas, gas ...
45
Membrane Performance of Micro and Ultrafiltration on Folic Acid Separation from Dent Corn (Zea mays var. indentata) Hydrolyzed by Rhizopus oligosporus-C1
... membrane pores are caused by a driving force and depends on a membrane porosity, membrane material, hydrophilicity, thickness, roughness, charge, ...UF pores. However, UF pores are generally ...
8
Enhancing membrane filtration and persulphate advanced oxidation processes for water treatment
... membrane porosity but did not change the membrane thermal ...lower porosity, narrow distribution of small pores and relatively smooth skin ...to porosity suggesting a tool for membrane design ...
400
In vitro degradation of PHBV scaffolds and nHA/PHBV composite scaffolds containing hydroxyapatite nanoparticles for bone tissue engineering
... Polymer scaffolds prepared from the optimum parameters exhibited >70% porosity and better handling properties. The optimum parameters were polymer concentration, 10% (w/v); solvent to water phase ratio, 1 : 1 or ...
13
The Validation Process of the Method of Balancing Gas Contained in the Pore Space of Rocks via Rock Comminution
... rocks' porosity and the effects of comminution in terms of assessing the possibility of opening the pore ...rocks' porosity fell in the range of ...open pores was included in the ...
16
Comparative Analysis of Characteristics of Stainless Steel Cellular Material Prepared through Powder Metallurgy Using Accicular and Crushed Urea as Spaceholder
... higher porosity making the pre-heated compact much ...The pores resulted beyond sintering are less in dimensions than those of the pores produced after preheating due to the large restoring force ...
6
Degradation analysis of Aluminum cellular alloy in saline ionic electrolyte
... Where W is weight of cellular-type AlMgZn alloy; and Vs, is the volume, so the bulk porosity refers to the volume fraction of all the pores in an ingot of the cellul[r] ...
9
Evolution of pore structure during microwave freeze-drying of Chinese yam
... open porosity of samples increased with the drying time. The open porosity was the smallest when the slice thickness was 4 ...open pores formed continuously during MFD ...open porosity. Figure ...
5
Fabrication of Lotus Type Silver with Directional Pores by Unidirectional Solidification in Oxygen Atmosphere
... the pores formed at the liquid- solid interface can re-dissolve to the melt with insufficient oxygen ...the pores. Then the shape of the pores can be distorted because the melt infiltrate into the ...
6
Effect of Pore Morphology on Compressive Yield Strength of Lotus Type Porous Copper with Various Specimen Sizes
... cylindrical pores aligned in one direction parallel to the solidification direction was fabricated by unidirectional solidification of the melt in a mixed gas of hydrogen and ...cylindrical pores in order to ...
5
Trapping virtual pores by crystal retro-engineering
... “virtual porosity”. Here, we have trapped the virtual porosity in an unstable, low-density organic molecular crystal by introducing a second molecule that matches the size and shape of the unstable ...
19
Thermo-Physical Characteristics of Building Glass Wool Insulant: A Review of Experimental Results and Well-Adapted Techniques
... Abstract: There is need of experimental determination of thermo-physical properties of building materials to bridge the gap between theoretically prediction and real performance of buildings. Few references present ...
9
1) Synthesis and surface modification of chitosan built nanohydrogel with antiviral and antimicrobial agent for controlled drug delivery
... like porosity increases and crosslinking density decreases due to the formation of hydrophilic contacts with aqueous ...size, porosity and deep pores with high internal surface area for extreme ...
7
Effect of Conditions of Unidirectional Solidification on Microstructure and Pore Morphology of Al Mg Si Alloys
... higher porosity than 90% is actively ...spherical pores and is applied to sound-absorbing materials and shock absorption ...high porosity; the spherical pores cause stress concentration under ...
7