Porosity
Haversian System
Materials Testing
Compressive Strength
Tissue Scaffolds
Microscopy, Electron, Scanning
Microscopy in which the object is examined directly by an electron beam scanning the specimen point-by-point. The image is constructed by detecting the products of specimen interactions that are projected above the plane of the sample, such as backscattered electrons. Although SCANNING TRANSMISSION ELECTRON MICROSCOPY also scans the specimen point by point with the electron beam, the image is constructed by detecting the electrons, or their interaction products that are transmitted through the sample plane, so that is a form of TRANSMISSION ELECTRON MICROSCOPY.
Polyesters
Tissue Engineering
Biocompatible Materials
Dental Casting Investment
Microradiography
Production of a radiographic image of a small or very thin object on fine-grained photographic film under conditions which permit subsequent microscopic examination or enlargement of the radiograph at linear magnifications of up to several hundred and with a resolution approaching the resolving power of the photographic emulsion (about 1000 lines per millimeter).
Bone Substitutes
Synthetic or natural materials for the replacement of bones or bone tissue. They include hard tissue replacement polymers, natural coral, hydroxyapatite, beta-tricalcium phosphate, and various other biomaterials. The bone substitutes as inert materials can be incorporated into surrounding tissue or gradually replaced by original tissue.
Powders
Surface Properties
Implants, Experimental
Bowhead Whale
Calcium Phosphates
Durapatite
Bone and Bones
Tablets
Polymers
Hardness
Bone Cements
Adhesives used to fix prosthetic devices to bones and to cement bone to bone in difficult fractures. Synthetic resins are commonly used as cements. A mixture of monocalcium phosphate, monohydrate, alpha-tricalcium phosphate, and calcium carbonate with a sodium phosphate solution is also a useful bone paste.
Ceramics
Polyurethanes
Silicon Dioxide
Stress, Mechanical
Bone Remodeling
The continuous turnover of BONE MATRIX and mineral that involves first an increase in BONE RESORPTION (osteoclastic activity) and later, reactive BONE FORMATION (osteoblastic activity). The process of bone remodeling takes place in the adult skeleton at discrete foci. The process ensures the mechanical integrity of the skeleton throughout life and plays an important role in calcium HOMEOSTASIS. An imbalance in the regulation of bone remodeling's two contrasting events, bone resorption and bone formation, results in many of the metabolic bone diseases, such as OSTEOPOROSIS.
Nanocomposites
Tensile Strength
Apatites
Nanofibers
Bone Regeneration
Physicochemical Processes
Permeability
Ursidae
Drug Compounding
Polyvinyl Alcohol
Chitosan
Biomechanical Phenomena
Equipment Failure Analysis
Radius
Nanostructures
Biofouling
Water
Tibia
Hydrogels
Elastic Modulus
Titanium
Chemistry, Pharmaceutical
Quartz
Computer-Aided Design
Bone Density
The amount of mineral per square centimeter of BONE. This is the definition used in clinical practice. Actual bone density would be expressed in grams per milliliter. It is most frequently measured by X-RAY ABSORPTIOMETRY or TOMOGRAPHY, X RAY COMPUTED. Bone density is an important predictor for OSTEOPOROSIS.
Cementation
The joining of objects by means of a cement (e.g., in fracture fixation, such as in hip arthroplasty for joining of the acetabular component to the femoral component). In dentistry, it is used for the process of attaching parts of a tooth or restorative material to a natural tooth or for the attaching of orthodontic bands to teeth by means of an adhesive.
Carboxymethylcellulose Sodium
Osteocytes
Glycols
Osseointegration
Magnesium Oxide
Filtration
Rhamnaceae
Lactic Acid
Microspheres
Freeze Drying
Polyethylene Terephthalates
Bixaceae
Wettability
Polyglactin 910
Excipients
Dental Casting Technique
Tantalum
Vacuum
Technology, Pharmaceutical
The application of scientific knowledge or technology to pharmacy and the pharmaceutical industry. It includes methods, techniques, and instrumentation in the manufacture, preparation, compounding, dispensing, packaging, and storing of drugs and other preparations used in diagnostic and determinative procedures, and in the treatment of patients.
Hibernation
Numerical Analysis, Computer-Assisted
Polymethyl Methacrylate
Polymerized methyl methacrylate monomers which are used as sheets, moulding, extrusion powders, surface coating resins, emulsion polymers, fibers, inks, and films (From International Labor Organization, 1983). This material is also used in tooth implants, bone cements, and hard corneal contact lenses.
Absorbable Implants
Calcification, Physiologic
Silicon
Glass
Guided Tissue Regeneration
Procedures for enhancing and directing tissue repair and renewal processes, such as BONE REGENERATION; NERVE REGENERATION; etc. They involve surgically implanting growth conducive tracks or conduits (TISSUE SCAFFOLDING) at the damaged site to stimulate and control the location of cell repopulation. The tracks or conduits are made from synthetic and/or natural materials and may include support cells and induction factors for CELL GROWTH PROCESSES; or CELL MIGRATION.
Delayed-Action Preparations
Povidone
Gelatin
Coating titanium implants with bioglass and with hydroxyapatite. A comparative study in sheep. (1/1668)
This study compares the osteointegration of titanium implants coated with bioglass (Biovetro GSB formula) and with hydroxyapatite (HAP). Twenty-four bioglass-coated and 24 HAP-coated cylinders were implanted in the femoral diaphyses of sheep, and examined after 2, 4, 6, 8, 12, and 16 weeks. The HAP coating gave a stronger and earlier fixation to the bone than did bioglass. Bioglass formed a tissue interface which showed a macrophage reaction with little new bone formation activity. In contrast, HPA, showed intense new bone formation, with highly mineralised osseous trabeculae in the neighbourhood of the interface. (+info)Enthacrynic and acid effects on inner wall pores in living monkeys. (2/1668)
PURPOSE: The influence of the inner wall of Schlemm's canal on aqueous outflow facility remains poorly understood. We examined the relationship between inner wall pore characteristics and outflow facility in living primate eyes in which facility had been pharmacologically increased by ethacrynic acid (ECA) infusion and in contralateral control eyes. METHODS: Outflow facility (two-level constant pressure perfusion) was measured in eight pairs of living monkey eyes before and after administration of a bolus dose of either 0.125 mM ECA or vehicle. After exsanguination, eyes were fixed in situ under constant-pressure conditions (mean fixation pressure approximately 19 mm Hg). The density and diameter of inner wall pores and the number and area of platelet aggregates on the inner wall of Schlemm's canal were measured by scanning electron microscopy. RESULTS: In ECA-treated eyes, outflow facility increased 63% (P < 0.0001), intracellular pore density decreased 46% (P = 0.0094), intracellular pore size increased 27% (P = 0.049), platelet aggregate density increased 158% (P < 0.0001), and area covered by platelets increased 210% (P = 0.012) relative to contralateral controls. Although the average density and size of intercellular pores were essentially unaffected by ECA, an increased density of large (> or = 1.90 microm) intercellular pores was seen in ECA-treated eyes. The density of intracellular pores increased with the duration of fixative perfusion. Other than a weak negative correlation between outflow facility and intracellular pore density in ECA-treated eyes (P = 0.052), facility was not correlated with inner wall pore features. CONCLUSIONS: Our data are most consistent with a scenario in which ECA promotes formation of large intercellular pores in the inner wall of Schlemm's canal, which are then masked by platelet aggregates. Masking of intercellular pores, combined with fixation-induced alteration of inner wall pore density, greatly complicates attempts to relate facility to inner wall structure and suggests that in vivo pore density is smaller than in fixed tissue. Additionally, facility-influencing effects of ECA on the juxtacanalicular tissue cannot be excluded. (+info)Effects of ethacrynic acid on Schlemm's canal inner wall and outflow facility in human eyes. (3/1668)
PURPOSE: The role of the inner wall of Schlemm's canal in determining aqueous outflow facility is poorly understood. To quantify the relationship between inner wall pore characteristics and aqueous outflow facility in human eyes, both control eyes and eyes in which facility had been pharmacologically increased by ethacrynic acid (ECA) infusion were studied. METHODS: Outflow facility was measured in enucleated human eyes before and after delivery of 0.25 mM ECA (one eye of each of 6 pairs) or 2.5 mM ECA (one eye of each of 13 pairs). ECA, and vehicle in contralateral eyes, was delivered into Schlemm's canal by retroperfusion, thereby largely avoiding drug exposure to the trabecular meshwork. After facility measurement, eyes were fixed under conditions of either constant pressure (physiological intraocular pressure, 13 pairs) or "equal flow" (6 pairs) and were microdissected to expose the inner wall of Schlemm's canal. The density and diameter of intercellular and intracellular inner wall pores were measured using scanning electron microscopy. RESULTS: Retroperfusion with 2.5 mM ECA increased facility by 73% (P < 0.001), whereas 0.25 mM ECA increased facility by 19% (not statistically significant). The density of intercellular pores in the inner wall of Schlemm's canal was increased by 520% in 2.5 mM ECA-retroperfused eyes (P < 0.00004), whereas intracellular pore density remained approximately constant. Large pores (size > or = 1.1 microm) were particularly enhanced in ECA retroperfused eyes. The net change in facility due to ECA was not correlated with changes in pore density or other inner wall pore statistics. CONCLUSIONS: Our data are most consistent with a model in which pores in the inner wall of Schlemm's canal indirectly influence facility. However, measured changes in facility due to changes in inner wall properties did not agree with quantitative predictions of the pore funneling theory, suggesting that changes in facility may instead be due to gel leakage from the extracellular spaces of the juxtacanalicular tissue. More definitive experiments are required to confirm this hypothesis. (+info)Diffusion of macromolecules in agarose gels: comparison of linear and globular configurations. (4/1668)
The diffusion coefficients (D) of different types of macromolecules (proteins, dextrans, polymer beads, and DNA) were measured by fluorescence recovery after photobleaching (FRAP) both in solution and in 2% agarose gels to compare transport properties of these macromolecules. Diffusion measurements were conducted with concentrations low enough to avoid macromolecular interactions. For gel measurements, diffusion data were fitted according to different theories: polymer chains and spherical macromolecules were analyzed separately. As chain length increases, diffusion coefficients of DNA show a clear shift from a Rouse-like behavior (DG congruent with N0-0.5) to a reptational behavior (DG congruent with N0-2.0). The pore size, a, of a 2% agarose gel cast in a 0.1 M PBS solution was estimated. Diffusion coefficients of the proteins and the polymer beads were analyzed with the Ogston model and the effective medium model permitting the estimation of an agarose gel fiber radius and hydraulic permeability of the gels. Not only did flexible macromolecules exhibit greater mobility in the gel than did comparable-size rigid spherical particles, they also proved to be a more useful probe of available space between fibers. (+info)Molecular mechanism for pore-formation in lipid membranes by the hemolytic lectin CEL-III from marine invertebrate Cucumaria echinata. (5/1668)
The pore-forming activity of CEL-III, a Gal/GalNAc specific lectin from the Holothuroidea Cucumaria echinata, was examined using artificial lipid membranes as a model system of erythrocyte membrane. The carboxyfluorescein (CF)-leakage studies clearly indicated that CEL-III induced the formation of pores in the dipalmitoyl phosphatidyl choline (DPPC)-lactosyl ceramide (LacCer) liposomes effectively but not in the DPPC-glucosyl ceramide (GlcCer) liposomes or DPPC liposomes. Such a leakage of CF was strongly inhibited by lactose, a potent inhibitor of CEL-III, suggesting that the leakage is mediated through the specific binding of CEL-III to the carbohydrate chains on the surface of the liposomes. The leakage of CF from the DPPC-lactosyl ceramide liposomes was pH-dependent, and it increased with increasing pH. The immunoblotting analysis and circular dichroism data indicated that upon interaction with liposomes, CEL-III associated to form an oligomer concomitantly with a marked conformational change. Furthermore, channel measurements showed that CEL-III has an ability to form small ion channels in the planar lipid bilayers consisting of diphytanoylphosphatidylcholine and human globoside (Gb4Cer)/LacCer. (+info)Heat stress and protective clothing: an emerging approach from the United States. (6/1668)
There is little doubt that heat stress affects many workers adversely and that protective clothing generally adds to the burden. The ACGIH threshold limit value for heat stress is the guiding document for evaluation of heat stress in the United States. Adjustment factors have been used to reflect the change in heat stress imposed by different clothing ensembles. While the first proposed factors started with limited experimental data and professional judgment, heat balance methods in the laboratory have yielded better estimates of adjustment factors and for a wider selection of ensembles. These same experiments have provided the starting point to accounting for nonporous clothing in heat balance evaluation schemes such as required sweat rate. Proposed changes to the ACGIH TLV have been mentioned and a framework for thinking about controls presented. (+info)Field testing of a personal size-selective bioaerosol sampler. (7/1668)
Existing samplers for the collection of bioaerosols have been designed with the aim of maintaining biological stability of the collected material, and in general do not select particles in accordance with international conventions for aerosol sampling. Many have uncharacterised sampling efficiencies and few are designed as personal samplers. If standard personal dust samplers are used for bioaerosols the viability of collected microorganisms may be compromised by dehydration. The objective of this study was to evaluate a novel personal bioaerosol sampler designed to collect the inhalable dust fraction and further subdivide the sample into thoracic and respirable fractions. The new sampler was tested to see whether it enhanced the survival of the collected microorganisms, and was assessed for ease of use in the field and in subsequent laboratory analyses. A number of occupation-related field sites were selected where large concentrations of bioaerosols were to be expected. The prototype sampler was found to be simple to use. Analysis could be carried out with similar efficiency either with all three fractions together for a total count, or separately for size selective data. The sampler performed at least as well as the standard IOM filter method but with the added advantage of size fractionation. The field trials showed that for sampling periods lasting several hours, microorganism survival within the sampler was adequate for culture and identification of the organisms present. This new sampler is now commercially available. In addition to bioaerosol sampling, the principle of size selective sampling using porous foams can be applied to other occupational hygiene problems, and also to indoor air monitoring of PM10 and PM2.5 concentrations. (+info)Molecular dynamics of synthetic leucine-serine ion channels in a phospholipid membrane. (8/1668)
Molecular dynamics calculations were carried out on models of two synthetic leucine-serine ion channels: a tetrameric bundle with sequence (LSLLLSL)(3)NH(2) and a hexameric bundle with sequence (LSSLLSL)(3)NH(2). Each protein bundle is inserted in a palmitoyloleoylphosphatidylcholine bilayer membrane and solvated by simple point charge water molecules inside the pore and at both mouths. Both systems appear to be stable in the absence of an electric field during the 4 ns of molecular dynamics simulation. The water motion in the narrow pore of the four-helix bundle is highly restricted and may provide suitable conditions for proton transfer via a water wire mechanism. In the wider hexameric pore, the water diffuses much more slowly than in bulk but is still mobile. This, along with the dimensions of the pore, supports the observation that this peptide is selective for monovalent cations. Reasonable agreement of predicted conductances with experimentally determined values lends support to the validity of the simulations. (+info)
PhD scholarship in Porous Materials and Foams Employed in Hearing Aids
Gidi & Pearls - The Best Moisturizers To Protect Your High Porosity Hair For Winter
Patente US8114806 - Catalysts having selected pore size distributions, method of making such ... - Google Patentes
Carbon porous beads TDX-02
Mongongo & Hemp Seed Oils High Porosity Moisture-Seal Masque | Black Beauty House
Swelling of cellulosic porous materials - mathematical description and verification :: BioResources
The role of surface chemistry and porosity on the adsorption of inflammatory mediators<...
Hair Care Tips for High Porosity Hair - TheWetLab
Modeling the Thermodynamics and Dynamics of Fluids Confined in Three-D by Anish Julius Desouza
Molecular simulation study on adsorption of methanol/water mixtures in mesoporous silicas modified pore surface silylation<...
Shea Moisture Mongongo &High Porosity Mois. Seal Shampoo13oz | The BraidBoxSwiss
Porosity & Your Hair
Acoustic methods for measuring the porosities of porous materials incorporating dead-end pores - Espace ÉTS
types of porosity
Working with your hairs porosity! What is hair porosity?
Patent US4994037 - Absorbent structure designed for absorbing body fluids - Google Patents
Controlled drug release from porous materials by plasma polymer deposition - Chemical Communications (RSC Publishing)
Hauptseminar Soft Matter SS 2019/Transport of electrolytes across porous materials - ICPWiki
Hauptseminar Soft Matter SS 2019/Transport of electrolytes across porous materials - ICPWiki
Porous Materials Inc.
Numerical evaluation of the influence of porosity on bending properties of 2D carbon/carbon composites - Nottingham ePrints
SVIBOR - Papers - project code: 2-15-020
Surfaces of Nanoparticles and Porous Materials | Taylor & Francis Group
页岩气表征 - 美国麦克仪器-比表面仪/物理吸附/化学吸附/压汞仪/粒度/孔隙度/真密度/包裹密度专业提供商
Water Behavior in Hydrophobic Porous Materials
Patent US20070049153 - Textured wiper material with multi-modal pore size distribution - Google Patents
Nanoil For High Porosity Hair - check the best oil for you!
Shape-Anchored Porous Polymer Monoliths for Integrated Online Solid-Phase Extraction-Microchip Electrophoresis-Electrospray...
Pore size distribution and adsorption selectivity of sepiolite | Clay Minerals | GeoScienceWorld
Experimental Investigation of the Effect of Pore Size Distribution on Nano-particle Capture Efficiency Within Ceramic...
Combined characterization of pore size distribution and permeability in fibrous textiles by capillary flow porometry - Espace...
High Porosity Particulate Beds Structurally Stabilized by Epoxy - Energy Innovation Portal
Porosity sealing
Dipòsit Digital de la Universitat de Barcelona: Influence of porosity on the critical currents of trifluoroacetate-MOD...
In-Pore stress by drying-induced capillary bridges inside porous materials. - INSU - Institut national des sciences de lUnivers
Pump Hair Porosity Equalizer SP - Pump Haircare Salon Professional
Controls on primary porosity and permeability development in igneous rocks<...
Use of Capillary Pressure Data and Log Calculated Water Saturation for the Characterization of Dual Porosity, Dual Permeability...
American Society for Testing and Materials (1999) Standard Test Method for Determination of Pore Volume and Pore Volume...
Porous objects having immobilized encapsulated biomolecules - Patent # 8709464 - PatentGenius
Patent US20050230252 - Microfluidic test device - Google Patents
SSOE - SSOE Resources - Five Pitt engineering faculty set university and school record by receiving competitive NSF CAREER...
Meso-Architecture Block Copolymers with High Surface Area Styrene-Bridged Organosilica Particles as Constituent for the Stimuli...
Porosity of Silica Monoliths with Tailored Mesopores of Ink-Bottle Shape Determined by Nitrogen Adsorption and Positron...
Porosity - calculator - fxSolver
5 Signs Indicating You Have High Porosity Hair - Hairlicious Inc.
583bv) Effect of Confinement in Nanopores of Carbon On Reaction Kinetics, Catalyst Activity and Selectivity | AIChE
Consolidation and Permeability Behavior of High Porosity Baltic Seabed by Ajoykumar Ag
PREMIER PRO MIX HIGH POROSITY - Golden Acre Home & Garden
Patent US6635174 - Foamed material filled with inner material - Google Patents
Foil Kites - Kiteforum.com
Post-Sampling & Earth Return - Unmanned Spaceflight.com
Downloads - Ace Glass Inc. Support Helpdesk
Knowledgebase - Ace Glass Inc. Support Helpdesk
SaturnFans.com Forums - Average Engine Life
code saturne User's Forum - Unanswered topics
Search Results - Practical Machinist - Largest Manufacturing Technology Forum on the Web
The Dataist Manifesto, part II
HPAC/ACVL :: View topic - Reserve Deployment Articles - reprints
Earthdata Forum - Tag-Search
Earthdata Forum - Tag-Search
Earthdata Forum - Tag-Search
MythBusters - Pizzamaking Edition - page 2 - General Pizza Making - Pizza Making Forum
91th Annual Meeting of the International Association of Applied Mathematics and Mechanics - ConfTool Pro Printout
Hydrus 1D - PC-Progress Discussion Forums
PHREEQC Users | Resource for geochemists | Forum
micro hot rod mill for sale
GM Performance Forum - GM Performance
Texture2
- Coverage depends on the porosity, type and texture of the surface. (uk.com)
- and chalcocite, Cu2S) is a complex mineral replacement reaction where the reaction pathway is controlled by the interplay between evolving mineral make-up, texture/porosity, and solution chemistry. (amiminerals.it)
Material3
- Hi Robin, to enter an intrinsic porosity of a material phase into a diffusivity simulation, use the Simulate Diffusion Experiment -option. (math2market.de)
- Dec 14, 2019 · DIN 1.0037 (material St37-2 ) equivalent to US ASTM AISI SAE, European standard EN, British standard BSI, France standard NF, ISO standard, Japanese standard JIS, Chinese GB standard and Indian IS standard. (un-bonbon-sale-par-terre.fr)
- St37-2 steel (1.0037 material) is an unalloyed structural steel grade complies with DIN 17100 1980 and has been discarded since 2004.According to German standard DIN 17100,St37 steel is divided into St37-2,USt37-2,RSt37-2 and St37-3.Material St 37 new designation is S235,and St37-2 new designation is S235JR (1.0038),the new standard is EN 10025-2 2004. (rotulosaviles.es)
Terms1
- In the Edit-menu you can now enter the effective values either in terms of effective diffusivity or in terms of effective porosity and tortuosity. (math2market.de)