Through the theoretic analysis and test the measurement of value K with small aperture has higher accuracy than that with large aperture, while the best measuring distance is (1～3) N (close to the zone).
(3) On the conditions of low temperature of 573 K, small pore size (1.5 nm for MCM-41 and 1.02 nm for pillared clays), high pressure of 600 bar and high feed mole ratio of N:H of 4:12 (0.3333), greater ammonia mole fraction in pore phase can be obtained, whereas only at low pressure of 100 bar can achieve a more
The influence of solvent system, additive, inorganic salt and second miscible polymer were analyzed. The results showed that small pore size PVDF UF membrane with high flux can be prepared by selecting optimum casting solution.
The properties of composite membrane using different base membrane are commented. The results indicate that the composite membranes with small pore size exhibit superior separation performance on the rejection of Na2SO4>90%.
Because of the small pore size (0.41nm) and its hydrophile property, NaA zeolite membrane can be used in the separation of small molecules or separating water from organic substance by penetration. The main work of this thesis is
The results show that at 940 K and during the stirring time period of 30～80 s, the porosity of the Al alloy melt foam is kept constant while the pore number increases and pore diameter decreases, which is a new method to fabricate Al alloy foam with high specific stiffness, low porosity and small pore diameter.
The technique can be used when conventional methods are inapplicable because of the small aperture dimensions relative to the wavelength, the presence of fluctuations, or nonstationary conditions.
The response of an infinitely small aperture is calculated, and the explicit solution is found for the case of a circular aperture.
However, a relatively high level of speckle noise in the difference image is caused by the spatial filtering with a small aperture (laser beam) in the minimum of the superposition field in the Fourier hologram plane.
Platelet function was assessed using the PFA-100 system that allows for quantitative assessment of platelet function, reporting platelet aggregatability as the time required to close a small aperture in a biologically active membrane.
The work presented in this article investigates the behaviour of the current in the load impedances of a lossless coaxial cable, with homogeneous metalic shielding, presenting an electrically small aperture defect in the shield.
We analyzed incoherent inelastic neutron scattering spectra of water confined in a nanoporous Gelsil matrix, with very small pore diameter (26??).
As the content of absorbent polymer increased, the porosity values decreased and mean pore diameter shifted to small pore diameter region.
The nitrogen adsorption-desorption analysis reveals that the prepared mesoporous silica possesses a small pore diameter of 3.68 nm, a total surface area of 363.648 m2/g, a total pore volume of 0.379 cm3/g, and a pore-wall thickness of 6.63 nm.
The small pore diameter for SBA-1 may be due to its cage-type pores constructed with small windows.