scholarly journals Pore Geometry and Nonoutflow of the Nonwetting Liquid Dispersed in Nanoporous Medium

2015 ◽  
Vol 72 ◽  
pp. 33-36 ◽  
Author(s):  
A.A. Belogorlov ◽  
S.A. Bortnikova ◽  
P.G. Mingalev
Keyword(s):  
Pore Geometry ◽  
Nonwetting Liquid

Polymorphic phase transition of a membrane protein - analysis of continuous diffuse electron diffraction intensity

1986 ◽  
Vol 44 ◽  
pp. 166-167
Author(s):  
Douglas L. Dorset ◽  
Andrew K. Massalski
Keyword(s):  
Molecular Sieve ◽  
Three Dimensional ◽  
Pore Geometry ◽  
Two Dimensional ◽  
Diffraction Intensity ◽  
Polymorphic Phase Transition ◽  
E Coli ◽  
Crystallographic Study ◽  
Hexagonal Form ◽  
Polymorphic Forms

Matrix porin, the ompF gene product of E. coli, has been the object of a electron crystallographic study of its pore geometry in an attempt to understand its function as a membrane molecular sieve. Three polymorphic forms have been found for two-dimensional crystals reconstituted in phospholipid, two hexagonal forms with different lipid content and an orthorhombic form coexisting with and similar to the hexagonal form found after lipid loss. In projection these have been shown to retain the same three-fold pore triplet geometry and analyses of three-dimensional data reveal that the small hexagonal and orthorhombic polymorphs have similar structure as well as unit cell spacings.

Pattern Formation in Thin Polymer Films: A New Morphology

2000 ◽  
Vol 629 ◽  
Author(s):  
Jean-Loup Masson ◽  
Peter F. Green
Keyword(s):  
Growth Rate ◽  
Pattern Formation ◽  
Early Stage ◽  
Structural Evolution ◽  
Distinct Form ◽  
Thin Polymer Films ◽  
Intermediate Morphology ◽  
Thin Polymer ◽  
Nonwetting Liquid ◽  
Cylindrical Holes

ABSTRACTResearchers have shown that thin, nonwetting, liquid homopolymer films dewet substrates, forming patterns that reflect fluctuations in the local film thickness. These patterns have been shown to be either discrete cylindrical holes or bicontinuous “spinodal-like” patterns. In this paper we show the existence of a new morphology. During the early stage of dewetting, discrete highly asymmetric holes appear spontaneously throughout the film. The nucleation rate of these holes is faster than their growth rate. The morphology of the late stage of evolution, after 18 days, is characterized by a bicontinuous pattern, distinct form conventional spinodal dewetting patterns. This morphology has been observed for a range of film thicknesses between 7.5 and 21nm. The structural evolution of this intermediate morphology is discussed.

scholarly journals Ceramic Biomaterial Pores Stereology Analysis by the Use of Microtomography

Materials ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2207
Author(s):  
Żaneta Garczyk ◽  
Zbigniew Jaegermann ◽  
Piotr Duda ◽  
Andrzej S. Swinarew ◽  
Sebastian Stach
Keyword(s):  
Internal Structure ◽  
Pore Geometry ◽  
3D Images ◽  
X Ray ◽  
Research Material ◽  
Comparison Of The Results ◽  
Chemical Foaming

The main aim of this study was to analyze microtomographic data to determine the geometric dimensions of a ceramic porous material’s internal structure. Samples of a porous corundum biomaterial were the research material. The samples were prepared by chemical foaming and were measured using an X-ray scanner. In the next stage, 3D images of the samples were generated and analyzed using Thermo Scientific Avizo software. The analysis enabled the isolation of individual pores. Then, the parameters characterizing the pore geometry and the porosity of the samples were calculated. The last part of the research consisted of verifying the developed method by comparing the obtained results with the parameters obtained from the microscopic examinations of the biomaterial. The comparison of the results confirmed the correctness of the developed method. The developed methodology can be used to analyze biomaterial samples to assess the geometric dimensions of biomaterial pores.

scholarly journals Rational design of nonstoichiometric bioceramic scaffolds via digital light processing: tuning chemical composition and pore geometry evaluation

2021 ◽  
Vol 15 (1) ◽  
Author(s):  
Yifan Li ◽  
Ronghuan Wu ◽  
Li Yu ◽  
Miaoda Shen ◽  
Xiaoquan Ding ◽  
...  
Keyword(s):  
Rational Design ◽  
Bone Repair ◽  
Pore Geometry ◽  
Porous Structures ◽  
Ion Release ◽  
Digital Light Processing ◽  
Cylindrical Pore ◽  
Mechanical Strengths ◽  
Ceramic Stereolithography ◽  
Mg Doped

AbstractBioactive ceramics are promising candidates as 3D porous substrates for bone repair in bone regenerative medicine. However, they are often inefficient in clinical applications due to mismatching mechanical properties and compromised biological performances. Herein, the additional Sr dopant is hypothesized to readily adjust the mechanical and biodegradable properties of the dilute Mg-doped wollastonite bioceramic scaffolds with different pore geometries (cylindrical-, cubic-, gyroid-) by ceramic stereolithography. The results indicate that the compressive strength of Mg/Sr co-doped bioceramic scaffolds could be tuned simultaneously by the Sr dopant and pore geometry. The cylindrical-pore scaffolds exhibit strength decay with increasing Sr content, whereas the gyroid-pore scaffolds show increasing strength and Young’s modulus as the Sr concentration is increased from 0 to 5%. The ion release could also be adjusted by pore geometry in Tris buffer, and the high Sr content may trigger a faster scaffold bio-dissolution. These results demonstrate that the mechanical strengths of the bioceramic scaffolds can be controlled from the point at which their porous structures are designed. Moreover, scaffold bio-dissolution can be tuned by pore geometry and doping foreign ions. It is reasonable to consider the nonstoichiometric bioceramic scaffolds are promising for bone regeneration, especially when dealing with pathological bone defects.

Effect of pore geometry and loading direction on deformation mechanism of rapid prototyped scaffolds

2012 ◽  
Vol 60 (6-7) ◽  
pp. 2778-2789 ◽  
Author(s):  
Soodeh Amirkhani ◽  
Reza Bagheri ◽  
Alireza Zehtab Yazdi
Keyword(s):  
Deformation Mechanism ◽  
Pore Geometry ◽  
Loading Direction

Interaction between particles in a nonwetting liquid

1983 ◽  
Vol 96 (2) ◽  
pp. 307-314 ◽  
Author(s):  
Vladimir S Yushchenko ◽  
Vasily V Yaminsky ◽  
Eugenie D Shchukin
Keyword(s):  
Nonwetting Liquid

scholarly journals The action of selective CRAC channel blockers is affected by the Orai pore geometry

Cell Calcium ◽  
2013 ◽  
Vol 53 (2) ◽  
pp. 139-151 ◽  
Author(s):  
Isabella Derler ◽  
Rainer Schindl ◽  
Reinhard Fritsch ◽  
Peter Heftberger ◽  
Maria Christine Riedl ◽  
...  
Keyword(s):  
Pore Geometry ◽  
Channel Blockers ◽  
Crac Channel

Research and application of seismic porosity inversion method for carbonate reservoir based on Gassmann’s equation

2021 ◽  
Vol 13 (1) ◽  
pp. 122-129
Author(s):  
Kaiyuan Liu ◽  
Li Qin ◽  
Xi Zhang ◽  
Liting Liu ◽  
Furong Wu ◽  
...  
Keyword(s):  
High Accuracy ◽  
Field Application ◽  
Carbonate Reservoir ◽  
Carbonate Reservoirs ◽  
Pore Geometry ◽  
Inversion Method ◽  
Well Testing ◽  
Seismic Attribute ◽  
Gassmann’S Equation ◽  
Inclusion Theory

Abstract Carbonate rocks frequently exhibit less predictable seismic attribute–porosity relationships because of complex and heterogeneous pore geometry. Pore geometry plays an important role in carbonate reservoir interpretation, as it influences acoustic and elastic characters. So in porosity prediction of carbonate reservoirs, pore geometry should be considered as a factor. Thus, based on Gassmann’s equation and Eshelby–Walsh ellipsoidal inclusion theory, we introduced a parameter C to stand by pore geometry and then deduced a porosity calculating expression from compressional expression of Gassmann’s equation. In this article, we present a porosity working flow as well as calculate methods of every parameter needed in the porosity inverting equation. From well testing and field application, it proves that the high-accuracy method is suitable for carbonate reservoirs.

Multiplicity of metastable nonergodic states of a dispersed nonwetting liquid in a disordered nanoporous medium

2014 ◽  
Vol 87 (10) ◽  
Author(s):  
Vladimir D. Borman ◽  
Anton A. Belogorlov ◽  
Alexey M. Grekhov ◽  
Vladimir N. Tronin
Keyword(s):  
Nonwetting Liquid
Sign in / Sign up

Export Citation Format

Share Document