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Showing 1 to 20 of 36 for “"void volume"”.
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Mechanics of periodic elastomeric structures with varying void volume fraction and thin-film coating
… such materials in two and three dimensions when void volume fraction is varied and a thin-film coating is incorporated. Computer modeling was used to predict and understand the mechanics of the transformation behavior; results showed that three-dimensional specimens behaved like their 2D …
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Characterising the porosity of multi-component mixtures in rotary mills
Porosity, or fractional void volume, is a simple but powerful quantity used in describing porous media. Characterising this very important parameter is vital to understanding key processes that occur in porous media, such as fluid transport. This is because porosity is strongly related to the …
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Lyocell Fiber-Reinforced Cellulose Ester Composites - Surface and Consolidation Considerations, and Properties
… matrix particles adhering to the fiber surfaces. Void volume formation was mitigated to a small extent by the use of optimal consolidation conditions. Composites formed at moderate temperature (200 °C), low consolidation pressure (11.8 p.s.i.) and high consolidation time (13 min.) were found to …
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Non-invasive characterization of bone tissue and modeling of bone at micron and sub-micron levels
… We investigate the effects of fiber orientation, void volume fraction and window size on the constitutive elastic response of such a beam network. We show that generally C1111 and C1212 values decrease with increasing window size, higher scattering angle, and higher void volume fraction. In …
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Studies of the Host Response and the Induction of Immunosuppression in Murine Malaria
… I (C), Peak I (G), and the sodium deoxycholate void volume all act as a vaccine against Plasmodium infection and are all without immunosuppressive activity as assayed by the plaque technique. Immunosuppressive activity was found in association with the sedimented parasite fragments (E), …
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Methane adsorption into sandstones and its role in gas recovery from depleted reservoirs
… parameters (pressure, contact time) and water on void volume of sandstone core samples. The average of the measured void volume using helium was 8.017cm3 for Bandera and 4.5171cm3 for the Scioto sandstones with a deviation of less than 0.002 cm3 and 0.001 cm3 indicating little dependence on …
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Modelling the Flushing Mechanism of Thin Flexible Surface Pavements
… The research aimed to determine the effects of volumetric properties of chip seal surfaces on flushing, focusing on the relationship between air voids and flushing initiation. Additionally, the research aimed to develop a pavement deterioration model to predict the initiation and progression of …
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Biochemically realistic MD and kinetic models of the Rhodobacter sphaeroides bc1 complex
… distortion on MD relaxation relating to a large void volume in the protein structures. In this model we have set up the membrane with the complement of lipids reported for the chromatophore membrane, and have taken steps to ameliorate the structural distortions on relaxation of the protein by …
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Realization of a 3D gradient index medium in porous silicon
… columns of solid material (Si or SiO2) and void. During its electrochemical porosification, the material’s refractive index is defined by modulating the current density along the etch direction to change the porosity in either periodic or continuous fashion, making PSi an excellent materials …
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The treatment of yeast factory effluent by an anaerobic submerged filter
… periods of 10 kg COD/(m³day), based on the void volume of the filter. The reduction in COD effected by the filter at these loadings varied between 40 and 60% of the applied COD, of which only approximately 70% was biologically degradable. Loadings of up to 16 kg COD/(m³day) were applied with …
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Characterization and modification of porosity in electrospun polymeric materials for tissue engineering applications
… size scale and surface chemistry, and large void fraction. The number of publications on the topic of electrospinning continues to grow exponentially, as the experimental apparatus is relatively inexpensive to assemble and 1 mm thick fiber mats can be generated in as little as 2 hours. Many …
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Fabrication of complex oral drug delivery forms by Three Dimensional Printing (tm)
… forms with high dosage is limited by powder void volume, filling efficiency, and drug solubility limits. Multiple print passes increased the dosage per tablet volume, 6, at the expense of process time. The use of drug suspensions to overcome solubility limits and uniaxial compression to …
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Investigation and computer modelling of the pore structure of paper and of consolidated pigment coatings
… to enhance the current state of knowledge of the void structure of paper, and pigments used to coat paper. The porosities and pore size distributions of consolidated pigments were measured using mercury porosimetry. Prior to this work, mercury porosimetry was rarely used in this field due to …
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Computational Design of Microvascular Biomimetic Materials
… optimization involving flow efficiency, void volume fraction and thermal control are presented. Results show that the tradeoffs between conflicting objectives is well captured so that the optimal design is readily available to the analyst.
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Methanol conversion to olefins and propene oligomerization over modified SAPO-34 and dealuminated mordenite
… - in order to reduce the intercrystalline void volume and thereby sterically hinder the formation of bulky coke molecules within the SAP0-34 pores; (v) Acid and caustic treatments - in order to reduce the catalyst acidity and thereby limit the rate of the coke formation reaction.
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EFFECTS OF OSMOLYTES ON THE CONFORMATIONAL STABILITY AND HYDRODYNAMIC RADII OF IMMUNITY PROTEIN 9 AND HUMAN SERUM ALBUMIN
… causes the protein to become more compact as its void volume is reduced. This increase in compactness induces stabilisation. In addition, HSA formulations were studied for their stability over 6 months under various conditions using trehalose, sucrose and glycerol as stabilisers instead of …
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Systematic assessment of the influence of voids on the material performance and failure in additively manufactured polymers.
… due to various factors, the presence of voids can significantly compromise structural integrity and influence failure behavior. This study investigates the effects of voids, generated by various process parameters to simulate as-manufactured voids seen, on the mechanical performance and …
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Quantitative Characterization of Nanovoids in Quenched Aluminum Using Small Angle X-ray Scattering Studies
… X-ray scattering (SAXS) study of quenched-in nanovoids in 99.988 and 99.995 at.% aluminum (Al) is presented. Nanovoids are agglomerations of point defects (vacancies) in the metallic host. SAXS is a non-destructive, dynamic probe which is ideally suited to characterize nanoscale electron density …
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Gas transport properties of reverse selective nanocomposite materials
… Solubility was relatively unaffected by the void volume concentration, although it did increase to some extent depending on the nanoparticle concentration. Wide angle X-ray diffraction, nuclear magnetic resonance, and Fourier transform infra-red experiments were used to determine if the …
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Effects of Voids on Delamination Behavior Under Static and Fatigue Mode I and Mode II
… failure. Manufacturing process defects such as voids and fiber waviness degrade the fatigue life and delamination resistance of the blade’s composite. This research describes the effect of voids on static and fatigue interlaminar fracture behavior under mode I and mode II loading of wind turbine …
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