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Showing 1 to 12 of 12 for “"barrier materials"”.
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Polymer/Clay Nanocomposites as Barrier Materials Used for VOC Removal
… nanoclay into a polymer matrix can affect the barrier properties of the pristine polymer in order to decrease the transport of volatile organic compounds (VOC) in indoor air. Building materials are a primary source for VOCs. These emissions are a probable cause of acute health effects and …
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The Effects of Barrier Materials on Reduction of Pericardial Adhesion Formation in Rabbits
목적: 이 연구의 목적은 hyaluronic acid 의 유도체로 액체의 점성을 지니는 가딕스-SL 과 최근 개발된 열 감응성 액체/겔 물질인 가딕스-SG 의 효능과 안전성을 토끼 심낭 유착모델을 이용하여 비교 분석하는 데에 있다. 방법: 총 60마리의 토끼를 외심막에 찰과상을 유발한 후에 적용시킨 물질의 종류에 따라 세 군으로 나누었다. CO군은 대조군으로 생리 식염수가 도포되었다. SL군은 가딕스-SL이, SG군은 가딕스-SG가 도포되었다. 수술 직후 그리고 수술 2주 후에 심장초음파로 좌심실박출계수, 그리고 심낭삼출의 유무를 …
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De-wrinkling of cellulosic barrier materials coated on paper during scale-up on a roll-to-roll system
… affects the uniformity and quality of overall barrier performance, resulting in a lack of consistency, poor adhesion, changes in mechanical properties, and non-uniform barrier properties. Highly wrinkled barrier films could also affect the quality of subsequent coatings or packing steps. In …
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Limiting membrane and diffusion behavior of a compacted sand-bentonite mixture for hydraulic and chemical containment
… component or as the sole component of engineered barriers used for waste containment applications, because the tendency of Na-bentonite to exhibit high swell can result in the restriction of advective and diffusive contaminant transport. Additionally, compacted mixtures of Na-bentonite and sand …
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The fundamentals of the separation of a mixture of hydrogen and carbon dioxide by gaseous diffusion
… one diffusion unit with two 6-inch diameter barrier areas. In the preliminary tests the flow rates of the hydrogen-carbon dioxide mixture were varied from 0 to 15 cubic feet per hour. Vacuum on the system was varied from 0 to 25 inches of mercury. Composition of the feed mixture was held …
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Interface roughness mediated optical decay and carrier dynamics in type II AlAs/GaAs heterostructures
Roughness at the interface between the well and barrier materials in quantum well systems has long been known to be an important factor determining carrier mobility in short period wells. Interface roughness (IR) has also been suggested as a possible decay mechanism in type II AlAs/GaAs …
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Contaminant diffusion and sorption of an artificial leachate in selected geologic barriers of Frankonia, Bavaria, Germany
The geologic barrier represents the final contact between a landfill and the environment. Ideally suited are clays and mudstones because of sufficient vertical and lateral extent, low hydraulic conductivities and high sorptive characteristics. Since hydraulic conductivity is no longer the single …
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Grazing Incidence X-ray Scattering from Magnetic Thin Films and Nanostructures
… magnetic and magnetoresistive thin film materials, and have particular relevance to the magnetic tunnel junction (MTJ) class of magnetic sensor. Co/Al2O3 thin films and Co/MgO multilayer thin films have been characterized using x-ray reflectivity and diffuse scatter analysis to explain …
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Rehardenable materials system with diffusion barrier for three-dimensional printing
… the skeleton material. However, the choices of materials systems are limited by the interactions of the metal powders and infiltrants during the infiltration process. Currently, the materials system with the best wear resistance for 3DP metal tooling consists of 420 stainless steel powder and …
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Surface modification of polymer membranes by self-organization
… due to fouling of the hydrophobic membrane materials by organics pervasive in feed waters. Current approaches to abate membrane fouling include substitution of more hydrophilic materials, as well as hydrophilic surface modification of hydrophobic membranes using coating and surface graft …
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Modeling VOCs Emissions from Multi-layered Structural Insulated Panels(SIPs)
… are a determinant of air quality in houses. Many materials used to construct and finish the interiors of new houses emit VOCs. These emissions are a probable cause of acute health effects and discomfort among occupants. Ventilation is another determinant of indoor air quality in houses, because it …
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Development of Ti-Si-N and Ta-Si-N as diffusion barriers
… The properties of the films as diffusion barriers between Cu and Si were studied using sheet resistance measurements, X-ray diffractometry (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), auger electron spectroscopy …