Results 221 to 230 of about 244,951 (247)
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Constructive Approximation, 1989
Suppose a fractal set E has the form \(U\setminus \cup_{n=1}C_ n\), where U and the disjoint \(C_ n\) are open domains such that \(clos \cup_{n=1}C_ n=clos U\) and \(c_{n+1}\geq c_ n,\) \(c_ n=diam C_ n.\) Denote \(e=\limsup \log n/(-\log c_ n)\) (which is equal to Borel's logarithmic rarefaction of E and to the Besicovitch-Taylor index) and let ...
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Suppose a fractal set E has the form \(U\setminus \cup_{n=1}C_ n\), where U and the disjoint \(C_ n\) are open domains such that \(clos \cup_{n=1}C_ n=clos U\) and \(c_{n+1}\geq c_ n,\) \(c_ n=diam C_ n.\) Denote \(e=\limsup \log n/(-\log c_ n)\) (which is equal to Borel's logarithmic rarefaction of E and to the Besicovitch-Taylor index) and let ...
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Annual Review of Analytical Chemistry, 2008
There are thousands of different nanometer-scale pores in biology, many of which act as sensors for specific chemical agents. Recent work suggests that protein and solid-state nanopores have many potential uses in a wide variety of analytical applications.
John J, Kasianowicz +4 more
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There are thousands of different nanometer-scale pores in biology, many of which act as sensors for specific chemical agents. Recent work suggests that protein and solid-state nanopores have many potential uses in a wide variety of analytical applications.
John J, Kasianowicz +4 more
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Angewandte Chemie International Edition, 2012
Another brick in the wall: Porous ternary cocrystals were prepared by chiral recognition between organic cage modules. One module, CC1, is ordered on 50 % of the lattice positions with respect to two other modules, CC3 and CC4, that are disordered across the other 50 % of sites (see picture).
Tom, Hasell +4 more
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Another brick in the wall: Porous ternary cocrystals were prepared by chiral recognition between organic cage modules. One module, CC1, is ordered on 50 % of the lattice positions with respect to two other modules, CC3 and CC4, that are disordered across the other 50 % of sites (see picture).
Tom, Hasell +4 more
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Nature Materials, 2009
Porous materials are important in a wide range of applications including molecular separations and catalysis. We demonstrate that covalently bonded organic cages can assemble into crystalline microporous materials. The porosity is prefabricated and intrinsic to the molecular cage structure, as opposed to being formed by non-covalent self-assembly of ...
Tozawa, Tomokazu +17 more
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Porous materials are important in a wide range of applications including molecular separations and catalysis. We demonstrate that covalently bonded organic cages can assemble into crystalline microporous materials. The porosity is prefabricated and intrinsic to the molecular cage structure, as opposed to being formed by non-covalent self-assembly of ...
Tozawa, Tomokazu +17 more
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Photopolymerized Porous Hydrogels
Biomacromolecules, 2021Hydrogels are polymeric networks highly swollen with water. Because of their versatility and properties mimicking biological tissues, they are very interesting for biomedical applications. In this aim, the control of porosity is of crucial importance since it governs the transport properties and influences the fate of cells cultured onto or into the ...
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Powder Metallurgy, 1969
The first suggestion that the porous products of powder metallurgy could be used as self-lubricating bearings appears to have been made sometime in the early 1920s. The idea probably originated from attempts to overcome the heat conductivity limitation of oil-soaked wooden bearings.
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The first suggestion that the porous products of powder metallurgy could be used as self-lubricating bearings appears to have been made sometime in the early 1920s. The idea probably originated from attempts to overcome the heat conductivity limitation of oil-soaked wooden bearings.
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European Journal of Cardio-Thoracic Surgery, 2012
A 50-year-old woman had dyspnoea from the right pleural effusion. A tube thoracostomy yielded 3 l of sanguineous, benign, sterile persistent effusion. A videothoracoscopy showed diaphragmatic blebs and pores (Fig. 1) with ascitic fluid squirting through them (Supplementary Video 1).
Sandeep, Sainathan, Shahriyour, Andaz
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A 50-year-old woman had dyspnoea from the right pleural effusion. A tube thoracostomy yielded 3 l of sanguineous, benign, sterile persistent effusion. A videothoracoscopy showed diaphragmatic blebs and pores (Fig. 1) with ascitic fluid squirting through them (Supplementary Video 1).
Sandeep, Sainathan, Shahriyour, Andaz
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SIAM Journal on Mathematical Analysis, 1980
Laminar isothermal fluid flow of two immiscible compressible fluid phases in a porous medium is formulated in terms of four unknown functions $\rho _1$, $\rho _2$, $S_1$ and $S_2$ in a pair of partial differential equations \[ \frac{\partial } {{\partial t}}\left[ {\phi (x,t)S_i \rho _i } \right] = \frac{\partial } {{\partial x}}\left\{ {\kappa (x,t ...
Ford, Wayne T. +2 more
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Laminar isothermal fluid flow of two immiscible compressible fluid phases in a porous medium is formulated in terms of four unknown functions $\rho _1$, $\rho _2$, $S_1$ and $S_2$ in a pair of partial differential equations \[ \frac{\partial } {{\partial t}}\left[ {\phi (x,t)S_i \rho _i } \right] = \frac{\partial } {{\partial x}}\left\{ {\kappa (x,t ...
Ford, Wayne T. +2 more
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Journal of Biomedical Materials Research, 1977
AbstractThe use of acrylic bone cement has a number of shortcomings, viz., high curing temperatures that can cause thermal necrosis, release of toxic monomer, and a less than perfect cement‐to‐bone bond. However, by modifying the cement composition through the addition of a soluble, nontoxic filler such as sucrose or tricalcium phosphate which does not
A M, Rijke +3 more
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AbstractThe use of acrylic bone cement has a number of shortcomings, viz., high curing temperatures that can cause thermal necrosis, release of toxic monomer, and a less than perfect cement‐to‐bone bond. However, by modifying the cement composition through the addition of a soluble, nontoxic filler such as sucrose or tricalcium phosphate which does not
A M, Rijke +3 more
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Accounts of Chemical Research, 2017
Developing science and technology of porous materials provides fuels and useful substances from ubiquitous gaseous substances such as air.
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Developing science and technology of porous materials provides fuels and useful substances from ubiquitous gaseous substances such as air.
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