The mechanical properties of the internal solid structure and the acoustic-mechanical interaction with a fluid determine the behaviour of porous materials when exposed to sound and vibration. Porous materials include foams, fibre materials and woven/unwoven fabrics, and have multiple applications in sound and vibration control. An elastic frame can provide them with mechanical stability when exposed to vibration. In this project you will acquire in-depth understanding of the vibroacoustic behaviour of porous materials used in hearing aids (HAs). You will explore alternative designs, materials, and fabrication techniques that can enhance their performance. You will benefit from the knowledge and tools available at CAMM to push the boundaries of this innovative research field. ...

Last week, I put up a post about good moisturizers for low porosity hair. This time, I want to talk about high porosity hair (you didnt think I would leave this out did you?). If you dont know how to test the difference, read this post. Unlike low porosity hair, high porosity hair absorbs moisture really well. However, it also loses moisture easily. Because the hair cuticles are often open, its hard for high porous hair to retain moisture. High porous hair can be attributed to heat damage, poor hair maintenance, harsh hair dyes or just good ole genes. Its usually thin and can break easily if not properly maintained. High porosity hair needs heavier products and sealants to aid in retaining moisture. Products that contain butters and thicker oils like shea butter, mango butter, babassu oil, olive oil and avocado oil can help to retain moisture high porosity hair. Also, protein-rich products aid in strengthen the hair. Proteins temporarily fill the porous gaps leaving the hair stronger and ...

A catalyst and a method of preparation of said catalyst is described herein. The catalyst includes one or more metals from Columns 6-10 of the Periodic Table and/or one or more compounds of one or more metals from Columns 6-10 of the Periodic Table, a pore size distribution with a median pore diameter ranging from 105 Å to 150 Å, with 60% of the total number of pores in the pore size distribution having a pore diameter within 60 Å of the median pore diameter, with at least 50% of its pore volume in pores having a pore diameter of at most 600 Å, and between 5% and 25% of its pore volume in pores having a pore diameter between 1000 Å and 5000 Å. Methods of producing said catalyst are described herein. Crude products and products made from said crude products are described herein.

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Dry, rough and unmanageable curls can turn the best of days into a bad hair day. Protect your hair with SheaMoistures High Porosity Moisture-Seal Masque formulated using ultra-hydrating Mongongo and Hemp Seed Oils to transform porous, over processed , damaged hair into soft, smooth, frizz-free curls and coils.High Porosity hair shaft cuticles are open causing the hair to lose moisture almost as soon as it is absorbed. Low moisture retention causes split ends, makes your curls rough, dry and prone to breakage. SheaMoistures High Porosity Moisture-Seal Masque is enriched with Mongongo and Hemp Seed Oils which seals in moisture by closing hair cuticles, forming a protective layer over your curls, leaving you hair bouncy, nourished and oh-so-amazing!SheaMoistures High Porosity Moisture-Seal Masque is fortified with natural ingredients like Baobab Proteins, Apple Cider Vinegar and certified organic Shea Butter which smooths down the cuticles of the hair shaft leaving you hair moisturized, smooth and

Swelling of Cellulosic Porous Materials - Mathematical Description and Verification. Anton Geffert,a,* Ondrej Vacek,b Andrej Jankech,b Jarmila Geffertová,a and Miloslav Milichovský c. The swelling of natural porous materials, including bleached pulp, as represented by mathematical descriptions, is influenced by a variety of different operating factors. The formerly used Generalised Hygroscopicity Model leads to either a disproportion between a model and a limit value of the sorption capacity or to noticeable deviation in the early swelling phase. Alternatively, the so-called Simple Bounded Growth model solely depends on the maximum sorption capacity, ignoring the physical properties that affect the fibre swelling rate. This research shows that the combination of the two models best describes the swelling process of bleached pulp - a rapid swelling phase and a slower swelling phase. The combined model was found to be useful in characterizing the well-known hornification process.. Contact ...

TY - GEN. T1 - The role of surface chemistry and porosity on the adsorption of inflammatory mediators. AU - Murphy, M. C.. AU - Phillips, G. J.. AU - Lloyd, A. W.. AU - Davies, J. G.. AU - Mikhalovsky, S. V.. PY - 2004/12/1. Y1 - 2004/12/1. N2 - The role of surface chemistry and porosity on the adsorption of inflammatory mediators was analyzed. It was found that the removal of lipopolysaccharide (LPS) and proinflammatory cytokines from the circulation was capable of providing a therapy to counteract sepsis. It was observed that all MAST carbons exhibited poor adsorption capability for LPS. The results show that porosity is helpful in the adsorption of LPS.. AB - The role of surface chemistry and porosity on the adsorption of inflammatory mediators was analyzed. It was found that the removal of lipopolysaccharide (LPS) and proinflammatory cytokines from the circulation was capable of providing a therapy to counteract sepsis. It was observed that all MAST carbons exhibited poor adsorption ...

Hair care tips for high porosity hair are very important. If your hair is low porosity, then its not going to have any problems with hair growth. However, if your hair is high porosity, then you need to take special measures to make sure that your hair grows properly. For example, if youre having trouble growing out your locks because theyre too coarse or thick and heavy, then there might be some things that can help you get rid of these issues.. The main thing is that you need to know what to do so that your hair doesnt become brittle or break off. Also, if you want to keep your hair healthy and strong, then you need to take proper care of it.. You dont want it breaking easily when doing physical activities like running around or working out.. There are various ways to deal with the problem of high porosity hair. Some of them include:. 1) Use a product containing proteins such as casein or soy protein.. These types of products will help your hair retain moisture better and prevent damage ...

Porous materials have application in adsorption based processes due to their high internal surface area and tailorable pore size. They find uses in fields such as catalysis, separation, biotechnology, and microelectronics. Fluids confined in such materials exhibit interesting behavior in regards to the condensation and evaporation mechanisms. Understanding study the behavior of fluids confined in these porous materials is necessary for the efficient design of these materials. The adsorption/desorption isotherm provides valuable information about the effect of network features like pore connectivity and pore size distribution on fluid behavior during pore condensation and evaporation. Such insight can be useful in the characterization of these porous materials. Three dimensionally ordered mesoporous (3DOm) carbon is a porous material that has recently emerged and is of interest. These porous structures are obtained from templating colloidal crystals formed from lysine-silica nanoparticles. The resulting

TY - JOUR. T1 - Molecular simulation study on adsorption of methanol/water mixtures in mesoporous silicas modified pore surface silylation. AU - Aoyama, Naoki. AU - Yoshihara, Tsukasa. AU - Furukawa, Shin ichi. AU - Nitta, Tomoshige. AU - Takahashi, Hideaki. AU - Nakano, Masayoshi. N1 - Funding Information: The research was partly supported by a Grant-in-Aid for Young Scientists (B) (No. 17760600) from the Ministry of Education, Science, Sports and Culture, Japan.. PY - 2007/8/25. Y1 - 2007/8/25. N2 - Two types of molecular simulation techniques have been utilized to investigate adsorption of methanol/water mixtures in a mesoporous silica with a hydrophobic pore surface: the NVT-ensemble Molecular Dynamics method with the melt-quench algorithm for modeling a fully-silylated mesoporous silica and the μVT-ensemble Orientaional-Biased Monte Carlo method for calculating adsorption isotherms. Adsorption isotherms of methanol and water at 333 K are calculated for an equi-relative-pressure mixture ...

Treat rough, unmanageable, damaged or dry hair with High Porosity Moisture-Seal Shampoo from SheaMoisture. This sulfate-free highly moisturizing shampoo is specially formulated for deep thorough cleansing of scalp and rough, damaged curls and coils prone to frizz, dryness and breakage.Dry hair, dehydrated and low moisture hair, feels rough, is frizzy or dull with split-ends and is shedding. This ultra-moisture rich shampoo wont strip, tangle or dry out your hair. SheaMoistures High Porosity Moisture-Seal Shampoo is enriched with Mongongo and Hemp Seed Oils, which repairs damage and seals moisture into your hair cuticles making your curls or coils feel smooth and nourished.Natural ingredients like Baobab Proteins and Apple Cider Vinegar have been blended together with certified organic Shea Butter to create a rich formula which gently smooths porous, rough or hair over-processed from color treatments or perms. SheaMoistures High Porosity Moisture-Seal Shampoo is formulated with ultra-hydrating

The Test: Many, many people on the internet have tried simple tests for porosity. Of all the methods I have seen, I think the following method gives you most accurate results. To determine your hair porosity level using water, spritz a small section of curls with water and watch how your hair reacts - does your hair absorb the water quickly (indicating high porosity) or does it remain on top (indicating a low porosity level).. Normal Porosity: These are the lucky curls. It accepts and retains moisture inside the cuticle. The curls are full of bounce and elasticity and hold styles well. This hair can be dyed easily, and usually requires very little maintenance. Avoid using heat styling tools. When you do use hot tools, use a thermal protectant. Natural or Sulfate-free shampoos and conditioners are good to use. Leave in conditioners can be used to cure fly-aways.. High porosity: I used to have highly porose hair. High porosity hair can be a real pain. Symptoms of high porosity hair could be that ...

Dupont, Thomas, Leclaire, Philippe et Panneton, Raymond. 2013. « Acoustic methods for measuring the porosities of porous materials incorporating dead-end pores ». Journal of the Acoustical Society of America, vol. 133, nº 4. pp. 2136-2145 ...

When a porosity problem occurs, you first need to determine the type of porosity. Porosity is symbolized in phi (Ï ) and its value is expressed in percentage. And that means that women with high porosity hair will find that their hair responds well to many different types and sizes of proteins. High porosity values indicate high capacities of the reservoir rocks to contain these fluids, while low porosity values indicate the opposite. Similarly, the definitions of the standard densities associated with rocks then follows: Typically porosity is a limited space devoid of metal where gas was trapped during solidification. Factors Affecting Porosity of Soil. Types of Pores in Soil 3. Unless otherwise ascribed many of the other diagrams and the photomicrographs were created by Christopher Kendall. The porosity classification guide can help you determine the porosity type. They can do protein treatments more often and see beautiful hair from it. The bulk of mineral content is made of clay, silt and sand,

You should also note that:. Even though your hair may be predominantly one type of porosity, some strands would be a different porosity. Secondly, one strand may be one porosity at the roots and another at the ends. For example, I think my hair is mostly high porosity but there might be some normal porosity strands. I have also noticed that my roots are normal porosity but my ends are high porosity. Hair care can be so confusing! In my next post, I will be talking more in-depth about determining your hair porosity and after that managing each of the porosity types. ...

In a disposable absorbent garment, an absorbent structure includes liquid absorbing material comprising an upper layer comprising preferably softwood fibers and having a density from about 0.03 to about 0.14 g/cc, a lower layer comprising preferably hardwood fibers, formed substantially separately from and underlying at least a portion of the upper layer, the second layer having top and bottom surfaces, a density from about 0.14 to about 0.3 g/cc, a total void volume greater than about 80%, an average pore size distribution generally less than the average pore size distribution of the upper layer. There is an overlap in the pore size distributions of the upper and lower layers such that the smallest pores in the upper layer are smaller than the largest pores in the lower layer and front and rear fluid storage pouches, preferably spaced from one another at the front one-third and rear one-third of the absorbent structure, respectively, each pouch comprise superabsorbent material disposed in a hydrophilic

In this communication, we present a novel approach for control of drug release from porous materials. The method is based on deposition of a plasma polymer layer with controlled thickness which reduces a pore diameter and, hence, defines the rate of drug release.

The transport of electrolytes across varying section channels or porous material is of paramount importance due to its relevance in diverse fields spanning from biology to oil extraction. Clearly in these scenarios the shape of the porous media or the ionic channel is crucial in determining the transport properties of the electrolyte, or viceversa, for every channel shape it is possible to identify an optimal protocol that maximizes the transport. In this seminar, we will present a simplified approach capable of capturing the role of the shape of the container in the overall transport. By means of our simplified approach we will show that novel dynamical regimes can be attained when the Debye length is comparable to the channel bottleneck. ...

The transport of electrolytes across varying section channels or porous material is of paramount importance due to its relevance in diverse fields spanning from biology to oil extraction. Clearly in these scenarios the shape of the porous media or the ionic channel is crucial in determining the transport properties of the electrolyte, or viceversa, for every channel shape it is possible to identify an optimal protocol that maximizes the transport. In this seminar, we will present a simplified approach capable of capturing the role of the shape of the container in the overall transport. By means of our simplified approach we will show that novel dynamical regimes can be attained when the Debye length is comparable to the channel bottleneck. ...

Porous Materials Incorporated has six product lines and manufactures over thirty different instruments. In addition, we hold several US and International patents on novel technology for characterization of pore structure. ...

Numerical simulation with progressive damage criterion is implemented to investigate the effect of porosity on the bending properties of 2D cross-ply carbon/carbon (C/C) composites. The mechanical properties of Pyrocarbon matrix regarding the change of porosity are calculated by using Mori-Tanaka approach. Combining with the stiffness degradation scheme, the ultimate bending strengths are calculated in Abaqus though a user-defined subroutine (USDFLD). Delamination is modelled by inserting cohesive elements between two adjacent plies. A good agreement is obtained when the FEM results are compared to three-point bending experiments. The FEM results show that the bending strength decreases greatly with the increase of porosity. When the porosity reaches up to 18%, the bending strength is decreased by 57%. The major fracture behaviors are interlamination delamination and continuous crack damage in 90° plies. With the increase of porosity, more severe interlamination delamination will be slightly ...

Summary: The aim of this paper was to investigate and analyze microwave and convection drying kinetics of porous materials on laboratory scale. A wet clay plate was chosen as a representative of porous materials. General statements as regards a drying process, whether on a theoretical or analytical level, phenomenological or empirical, still presents on open issue. This is specially true for microwave drying. Modelling was based on elementary layer theory adapted to practical cases of wet plates drying of porous materials both in a laboratory convection dryer and laboratory test apparatus for microvave drying. During the drying process of shaped porous materials, it is inevitable to have knowledge of maximum allowed drying rate curve which can be only obtained by experimentation. Taking this into account special attention was payed to finding out the maximum allowed drying rate curve both for convection and microwave drying. It is, thereby, necessary to have a model that can sufficiently ...

This innovative reference collects state-of-the-art procedures for the construction and design of nanoparticles and porous material while suggesting appropriate

Mercury intrusion porosimetry is a valuable method for characterizing relative pore space dimensions. This dynamic technique is based on the intrusion of mercury into a porous structure under stringently controlled pressures. Mercury intrusion porosimetry permits the calculation of numerous sample properties such as pore size distributions, total pore volume, total pore surface area, median pore throat diameter, and sample densities (bulk and skeletal).. Capillary behavior and permeability are critical to reservoir behavior. Porosimetry is among the few techniques capable of probing the fine connected pore space of shales. This method is particularly useful in evaluation reservoir quality variations within a shale play and in petrotyping shale (Kale et al., 2010, Society of Petroleum Engineer).Various empirical transforms can be applied to estimate permeability from mercury intrusion data. While not quantitative, these estimates can provide a relative assessment of the variation in permeability. ...

Finden Sie alle Bücher von Fleys Matthieu - Water Behavior in Hydrophobic Porous Materials. Bei der Büchersuchmaschine eurobuch.de können Sie antiquarische und Neubücher VERGLEICHEN UND SOFORT zum Bestpreis bestellen. 9783639091427

Disclosed herein are textured nonwoven wiper materials. The textured nonwoven wiper material includes a meltblown nonwoven web material that has a first exterior surface and a second exterior surface, and at least the first exterior surface of the meltblown nonwoven web is a three-dimensional textured surface. The textured meltblown nonwoven web has a multi-modal pore size distribution that includes at least two major pore size peaks.

INTENDED USE: Nanoil For High Porosity Hair is one of the three oils available in the range. The high porosity version is designed to rebuild, moisten, beautify and protect dry, damaged hair. Nanoil will also take care of the dry sensitive and irritated scalp. COMPOSITION AND EFFECTS: Nanoil nourishes the scalp and bulbs and the […]

Shape-Anchored Porous Polymer Monoliths for Integrated Online Solid-Phase Extraction-Microchip Electrophoresis-Electrospray Ionization Mass Spectrometry ...

S. Inagaki, Y. Fukushima, Hikaru Doi, O. Kamigaito; Pore size distribution and adsorption selectivity of sepiolite. Clay Minerals ; 25 (1): 99-105. doi: https://doi.org/. Download citation file:. ...

The effect of the pore size distribution on size-resolved filtration efficiency was investigated for two ceramic particulate filters using

Causse, P. et Trochu, F.. 2018. « Combined characterization of pore size distribution and permeability in fibrous textiles by capillary flow porometry ». In 14th International Conference on Flow Processing in Composite Materials (Lulea, Switzerland, May 30 - June 01, 2018 ...

The present invention provides a porous thermal regenerator apparatus and method of making a porous thermal regenerator comprised of metallic or intermetallic particles that are held together in a porous three dimensional network by a binding agent (such as epoxy). One aspect of the apparatus is that the porosity of the porous thermal regenerator is greater than the tapped porosity of the particles comprising the porous thermal regenerator; moreover, the high-porosity apparatus is durable, that is, it remains intact when exposed to strong time-varying magnetic forces while immersed in aqueous fluid. This high porosity, when combined with high strength and aqueous heat transfer fluid stability, leads to improved porous thermal regenerators and concomitantly to magnetic refrigerators with improved performance.

Porosity sealing , is the process of filling a porous substrate to make it airtight . Porosity is sealed through the process of vacuum impregnation . Vacuum impregnation is the preferred method for sealing parts to prevent fluids or gases from leaking under pressure. Vacuum impregnation seals porosity and leak paths that form during the casting or molding process. It does so without changing the castings' dimensional or functional characteristics and allows manufacturers to use parts that would otherwise be scrapped. There are three types of porosity; Flow Porosity, Gas Porosity and Shrink Porosity. Porosity is found in many cast metal components, but it commonly found in aluminium and magnesium die castings. Process Porosity sealing is a four-step process: In the impregnation chamber (also known as an autoclave, pressure vessel or vacuum vessel) air is evacuated from the leak path in the part by using a deep vacuum. The evacuated leak path is filled with sealant by covering the part with the

The influence of porosity on the superconducting properties have been investigated on YBa/sub 2/Cu/sub 3/O/sub 7/ thin films deposited on LaAlO/sub 3/ [100] substrates by the so-called Trifluoroacetate (TFA) route. Micro-Raman spectroscopy have been used to determine the concentration of c-axis grains /spl delta/ in different samples and their influence on the final film porosity as observed from SEM imaging. This has been compared with measurements of resistivity and critical currents in the same samples. We prove that this /spl delta/ fraction is the main parameter controlling the porosity and hence the normal-state resistivity of the thin films. The optimization of the microstructure of these YBa/sub 2/Cu/sub 3/O/sub 7/ TFA films allow to have high critical currents : J/sub c/ = 3 /spl times/ 10/sup 6/ A/cm/sup 2/ at 77 K ...

We present here some evidences that capillary liquid bridges are able to deform micrometric cylindrical pores by tensile stress. Brine-soaked filter membranes are submitted to drying conditions leading to NaCl precipitation inside the 5-10 μm pores. A close examination demonstrated that two forms of NaCl crystallites are successively generated. First, primary cubic crystals grow, driven by the permanent evaporation. When this angular primary solid gets near the pore wall, while the evaporation makes the pore volume to be partly invaded by air, capillary liquid can bridge the nowsmall gap between the halite angles and the pore wall. In a second step, these small capillary bridges are frozen by a secondary precipitation event of concave-shaped NaCl. The proposed interpretation is that the liquid capillary bridges deform the host matrix of the membrane, and the situation is fossilized by the growth of solid capillary bridges. A quantitative interpretation is proposed and the consequences towards the

Designed For High Porosity hair! Not sure if you have high porosity? Do the test! Take one strand of hair that has fallen out or from your brush and place in a glass of water. Wait a few minutes and if your hair floats you have low porosity hair. If it sinks to the bottom, you have high porosity hair and this product i

TY - JOUR. T1 - Controls on primary porosity and permeability development in igneous rocks. AU - Petford, Nick. PY - 2003. Y1 - 2003. N2 - Some of the more important processes leading to the development of primary igneous porosity due to the cooling and crystallization of magma are reviewed. A distinction is made between volcanic and plutonic rocks, and crystalline and granular volcanic material. Porosity in each rock type is classified according to a proposed effective length scale and geometry into diffusive (Class D) and macroscopic flow (Class F) features. Estimated ranges in values of porosity and permeability are given for a wide selection of igneous rock types, and comparison is made with permeability variations (Δk) derived for both the continental and oceanic crust. While fracture porosity is dominant in most crystalline materials, primary porosity development may play an important role in the final (total) porosity in igneous basement. Some types of primary porosity and permeability ...

Use of Capillary Pressure Data and Log Calculated Water Saturation for the Characterization of Dual Porosity, Dual Permeability Systems. This paper describes a simple method to divide the effective porosity values that can be calculated from log analysis into two flow media (fracture and matrix) pore volumes for use in numerical simulation models. The division of the porosity is based on the assumption that the total porosity of the system is made up from two contributing rock types or lithofacies that have distinct pore size and/or pore size distribution such that they can be represented by different capillary pressure functions. This assumption is applicable to the non-fractured as well as to the fractured systems.. When the method is used for the fractured systems, the fracture is typically represented by a zero capillary pressure value (gravity segregation). The matrix has its own laboratory measured capillary pressure curve. Based on a predetermined water-hydrocarbon contact and using the ...

American Society for Testing and Materials (1999) Standard Test Method for Determination of Pore Volume and Pore Volume Distribution of Soil and Rock by Mercury Intrusion Porosimetry, Designation D 4404-84 (Reapproved 1992). Annual Book of ASTM Standards, 04.08, 588-592.

A porous object includes a porous material having internal pore surfaces and external pore surfaces. Releasing material encapsulated biomolecules are immobilized on at least one of the internal pore surfaces, at least one of the external pore surfaces, or combinations thereof.

The present invention provides biosensor test devices for measuring the presence or amount of an analyte in a biological fluid. The devices have a base plate that has an electrode system embedded therein, and a hydrophilic porous material situated on the base plate. A hydrophobic protective layer is situated on the hydrophilic porous material, and a cover is placed on the hydrophobic protective layer to complete the device. Some embodiments also use an insulating layer, which can be situated between the base layer and the hydrophilic porous material. The cover of the device has an opening present therein, situated over the electrodes, so that the electrodes communicate with the exterior of the device through the groove. The insulating layer can also have a groove situated therein, which in one embodiment is placed to align with the groove in the cover. The invention also provides methods of manufacturing the devices, and methods of using them.

Summary: The development of new porous materials is critical to improving important gas storage and separations applications, and will have a positive impact on reducing greenhouse gases. This includes the deployment of methane and/or hydrogen gases as alternative fuels, development of new filters for removing trace gaseous contaminants from air, and separation of carbon dioxide from flue gas to mitigate greenhouse emissions from the burning of fossil fuels. Dr. Wilmers grant will enable his lab to utilize computational methods to probe the limits of material performance for physical adsorption to porous materials. Although past computational screening has suggested physical limits of adsorption capacity for metal-organic frameworks (MOFs), this project will explore the novel use of so-called pseudomaterials, which represent all potential atomistic arrangements of matter in a porous material ...

Meso-Architecture Block Copolymers with High Surface Area Styrene-Bridged Organosilica Particles as Constituent for the Stimuli-Responsive Remediation of Water

The comparison of pore size distributions obtained with the use of two porosimetric methods: low temperature nitrogen sorption (LN2) and positron annihilation lifetime spectroscopy (PALS), was performed for porous silica monoliths. Four investigated samples were prepared under various synthesis conditions. Nitrogen sorption showed the presence of bottle-shaped pores in all investigated samples. In addition, it seems that the presence of methanol during synthesis influences porosity to a greater extent than organic additives. Quite good agreement between the LN2 and PALS results was observed only for the silica monolith synthesized with β-cyclodextrins as pore directing agent. The biggest discrepancy in the results obtained from these two techniques was observed for the silica gel synthesized with no additives. The origin of such discrepancies, taking into account the shape of pore size distribution and deficiencies of data analysis techniques, is discussed ...

The volume of the voids of a soil over the total volume of the sample defines the porosity of a soil. Used in geology, hydrogeology, soil science, and building science, the porosity of a porous medium (such as rock or sediment) describes the fraction of void space in the material, where the void may contain. Porosity is a fraction between 0 and 1, typically ranging from less than 0.01 for solid granite to more than 0.5 for peat and clay. It may also be represented in percent terms by multiplying the fraction by 100. Porosity is the ratio of pore volume to its total volume. Porosity is controlled by: rock type, pore distribution, cementation, diagenetic history and composition. Porosity is not controlled by grain size, as the volume of between-grain space is related only to the method of grain packing.

Hair that has a high porosity tends to have raised cuticles and the hair too-readily absorbs moisture. Overly-porous hair also releases moisture easily, thus; becoming dry and prone to damage. Perms and straighteners will process much faster in high-porosity hair. Having highly porous hair does not mean your hair is damaged, it just means you have to use different methods when taking care of it ...

Polymer-derived nanoporous carbon materials with high thermal stability, high surface area and narrow pore size distribution have been widely used as catalyst supports. Catalyst performance (activity and selectivity) is significantly affected by the pore size and porosity of the carbon support. Mass transfer limitation inside the pores and steric hindrance imposed by the pore walls can enhance catalyst selectivity and alter reaction kinetics. In this study, platinum embedded in nanoporous carbon spheres was used as a shape selective catalyst for liquid phase hydrogenation of alkenes. Experimental data obtained for different synthesized catalysts with different porosity and pore sizes were used to estimate kinetic parameters (Langmuir-Hinshelwood) and diffusion coefficients for different reactants and products inside the pores, using numerical solution of reaction-diffusion equation. It was shown that adsorption equilibrium constants and reaction rate constants are larger inside the nanopores of ...

The consolidation and permeability characteristics of high porosity surficial sediments from the Coastal Benthic Boundary Layer (Naval Research Laboratory) Special Research Program test site in the EckemfOrde Bay Baltic Sea were studied using a backpressured, constant rate of deformation (CRD) consolidation and permeability testing system driven by flow pumps The silty clay sediments from the Baltic test site are characterized by high void ratios (above 6), large organic content and dissolved or free methane gas bubbles. The high organic content (up to 17%) influences several of the unique features of these sediments including high water contents (up to 500%; porosities up to 93%), high consistency limits and high compressibility. The sediments are dominated by clay and silt size fractions (42% and 55% respectively) with a small percentage (3%) of sands. Organic content determinations performed on selected samples indicated a variation from 9% to 17% in the organic fraction (dry weight basis). Atterberg

PRO-MIX® HP, with its high perlite content, provides a growing environment which benefits growers looking for significant drainage capacity, increased air porosity and lower water retention. The added benefit of a fibrous peat moss and coarse perlite makes this formulation ideal for growers demanding a superior quality product adapted to their needs for watering flexibility and crop seasonality. HP=high porosity. ...

A matrix including: a) a polymeric base matrix including macropores (pore system 1) and b) an interior material, possibly porous (pore system 2), retained within the macropores. The matrix is characterized in that there is a continuous free volume between the interior material and the pore walls of the macropores. A method for manufacturing a matrix including a base matrix having macropores in which an interior material is located. The method is characterized in including the steps: (I) providing a base matrix having macropores; (ii) filling the macropores with a soluble form of the interior material; (iii) transforming the insoluble from to an insoluble form; (iv) shrinking the insoluble form; and (v) irreversibly stabilizing the material in its shrunken form. The matrix can be used in separation methods, cell culturing, solid phase synthesis of organic molecules, and in catalytic reactions (such as enzyme reactions) and other uses in which porous support matrices are used.