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Showing 1 to 20 of 28 for “"CMCs"”.
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Interfacial Mechanics in Fiber-Reinforced Composites: Mechanics of Single and Multiple Cracks in CMCs
… fibers and matrix in ceramic matrix composites (CMCs) are studied. The first issue is the competition between crack deflection and penetration at the fiber/matrix interface. When a matrix crack, the first fracture mode in a CMC, reaches the interface, two different crack modes are possible; crack …
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Synthesis, Characterization, and Micellar Properties of Dendritic Amphiphiles
… salt provided better solubility and higher CMCs of these amphiphiles than the potassium salt. All amphiphilic series tested lowered the solution surface tension from ~ 72 mN/m to ~ 50–55 mN/m, indicating that these amphiphiles are less surface active than typical surfactants such as sodium …
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Synthesis, Characterization, Critical Micelle Concentration and Biological Activity of two-Headed Amphiphiles
… the concentration required for detergency. The CMCs for the 2CAmn series were found to decrease in value from 3.0 Ã 10â 2 M (2CAm13) to 1.7 Ã 10â 4 M (2CAm21) in a linear fashion [log CMC = (â 0.28 ± 0.01)n + (2.2 ± 0.1)]. The CMCs for the 2CAmn series falls in between the CMCs for three series …
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Synthesis, Characterization, Critical Micelle Concentration and Antimicrobial Activity of Two-headed Amphiphiles
… were made in 0.9% triethanolamine solution. The CMCs were measured at two pH ~9.2 and 7.4. The CMCs were determined by plotting I1/I3 vs. concentrations. The CMCs were decreasing with increasing chain length. The CMCs for the 2CCbn series are lower than the 3CCbn series but higher than the fatty …
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Development of Computerized Multicomponent Cognitive Stimulation for Improving Cognitive Functions in Older Adults with Mild Cognitive Impairment: A Multimodal Investigation Using Neuropsychological and EEG/ERP Assessment
… Multicomponent Cognitive Stimulation (CMCS) program, adapted from Cognitive Stimulation Therapy (CST), in improving cognitive functions, emotions, and quality of life in older adults with mild cognitive impairment (MCI). Ninety-three participants (mean age = 67.68 years) were randomly …
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Transverse fracture and fiber/matrix interface characteristics of hybrid ceramic matrix composites
<p>"Ceramic Matrix Composites (CMCs) represent an attractive class of engineering materials for use in high temperature, high wear and corrosive environments. Much effort has been made to ascertain and improve the strength and fracture characteristics of these materials. Approaches that have …
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Gene expression patterns of the female genital tract and immunomodulation by Lactobacillus species
… Cervical and peripheral blood mononuclear cells (CMCs and PBMCs) were isolated and mRNA was extracted for microarray analysis using the Illumina HumanHT-12 v3 Expression BeadChip system. Eight Lactobacillus isolates, two of each L. jensenii, L. mucosae, L. crispatus and L. vaginalis species were …
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Quasi-Static and Creep Behavior of Enhanced SIC/SIC Ceramic Matrix Composites
… the creep behavior of ceramic matrix composites (CMCs) use the time hardening model and rate equations for expressing the dependence of creep strain on time, temperature and stress. Such laws, although simple and easy to use, are inadequate to represent the creep behavior over a range of stress …
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Pressureless Densification of Alumina - Titanium Diboride Ceramic Matrix Composites
… produced Al2O3/TiB2 Ceramic Matrix Composites (CMCs). Previous research has shown SHS produced Al₂O₃/TiB₂ composites exhibited unique microstructural properties that contributed to high strength, fracture toughness, and hardness properties. Pressureless densification of SHS produced Al₂O₃/TiB₂ …
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Defluoridation of Water Using Silica Based Aluminum Coated Adsorbents
… sand (AlCSS), copper–magnesium-coated sand (CMCS), and aluminum–magnesium–calcium-coated sand (AMCCS), also demonstrated high removal efficiency under varying water chemistries, with minimal interference from co-existing ions except bicarbonate. All sorbents followed pseudo-second-order …
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The detection of occult metastatic disease in patients with cutaneous melanoma
… for the detection of circulating melanoma cells (CMCs) is potentially a powerful tool for identifying those patients at risk for developing metastases. The first aim of this study was to develop a more sensitive, reproducible, cost effective and clinically applicable assay and to eliminate the …
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An Investigation of Digital Reference Interviews: A Dialogue Act Approach
… increase of computer-mediated communications (CMCs) in various forms such as micro-blogging (e.g. Twitter), online chatting (e.g. digital reference) and community- based question-answering services (e.g. Yahoo! Answers) characterizes a recent trend in web technologies, often referred to as the …
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Space-Time Multiscale-Multiphysics Homogenization Methods for Heterogeneous Materials
… elevated temperature Ceramic Matrix Composites (CMCs). In the final phase of the research a mathematical model for coupled moisture diffusion-mechanical deformation is developed. This model is integrated with the spatial homogenization framework to analyze problems consisting of multiple length …
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A new class of photoresponsive surfactants
… surface tensions (at concentrations above their CMCs) were as high as 14.4 mN/m under radiation of different wavelengths. This large and reversible change in saturated surface tensions in response of different illumination conditions made these new surfactants have potential applications in the …
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Synthesis of Polysaccharide-based Biomaterials for Drug Delivery
… cellulose (Ox-HPC)/carboxymethyl chitosan (CMCS) crosslinked by imine bond. Phenylalanine as a model amine-containing drug was chemically bonded to the Ox-HPC hydrogel component and was observed to release faster at the pH of a tumor microenvironment. These hydrogels show promise as …
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Modeling the micellization behavior of fluorosurfactants using molecular-thermodynamic theory
… found to compare very well with the experimental CMCs for several binary mixtures of linear surfactants, thereby laying the foundation for using the CSMT model to predict micellization properties of mixtures of surfactants that have a more complex chemical architecture. Finally, an MT framework …
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The influence of polymeric charge and structure, molecular weight and ionic conditions on depressant ability to reduce the natural floatability of talc
… similar depressing ability was obtained for the CMCs and the guars. However, the batch floats indicated that increasing dosage led to improved depressant performance while the microflotation tests indicated that a maximum level of depression was achieved at fairly low dosages
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Modeling and Simulation of a Cascaded Three-Level Converter-Based SSSC
… utilizing cascaded-multilevel converters (CMCs). Among flexible AC transmission system (FACTS) controllers, the SSSC has shown feasibility in terms of cost-effectiveness in a wide range of problem-solving abilities from transmission to distribution levels. Referring to the literature …
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Understanding the Responses of a Metal and a CMCTurbine Blade during a Controlled Rub Event using a Segmented Shroud
Commercially available CMCs, or ceramic matrix composites, provide several benefits over metal blades including weight and increased temperature capability, which may save performance by significant reduction of the cooling flow bled from the compressor. The turbine inlet temperature has …
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Synthesis, Characterization, and Antimicrobial Activity of Water-soluble, Tri-carboxylato Amphiphiles
… are at least 8-fold lower than the corresponding CMCs. Amphiphile <b>3CUr16</b> is the most active; the MIC₀ is 100-fold smaller than the CMC. With this consideration, we have suggested that the mechanism of action of the antimycobacterial activity in amphiphile <b>3CUr16</b> is not related to …
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