Academic literature on the topic 'Matrix encapsulation'

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Journal articles on the topic "Matrix encapsulation"

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Mendes, Luana Guabiraba, Francisco Rogênio da Silva Mendes, Roselayne Ferro Furtado, et al. "Use of cashew gum combined with galactomannan for encapsulation of Rosmarinus officinalis essential oil." Journal of Environmental Analysis and Progress 5, no. 4 (2020): 369–80. http://dx.doi.org/10.24221/jeap.5.4.2020.2748.369-380.

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Encapsulating matrices are important to maintain the properties, promote the low and controlled release, and avoid these bioactive compounds' undesirable reactions. This study's objective was to evaluate cashew gum (CG) use combined with galactomannan (GAL) in the rosemary essential oil encapsulation by atomization. During the emulsification, the polysaccharides were crosslinked with sodium trimetaphosphate. The particles obtained after encapsulation were evaluated for moisture, solubility, particle size, encapsulation efficiency, morphology, antimicrobial activity, and chemical composition of the essential oil volatiles. GAL/CG blend showed higher encapsulation efficiency and lower oil release than the cashew gum matrix. Undoubtedly, galactomannan combined with cashew gum improved the microparticles' characteristics due to the galactomannan's high emulsifying property even in low concentration. Essential oil maintained its antimicrobial and chemical properties practically after the encapsulation procedure.
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Klyachko, N. L., O. V. Ignatenko, N. F. Dmitrieva, et al. "Matrix design for bacteriolytic enzyme encapsulation." Journal of Drug Delivery Science and Technology 16, no. 4 (2006): 293–99. http://dx.doi.org/10.1016/s1773-2247(06)50053-x.

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Lestari, Agnes Dyah Novitasari, Dwi Siswanta, Ronny Martien та Mudasir Mudasir. "Synthesis, Characterization, and Stability Evaluation of β-Carotene Encapsulated in Starch-Chitosan/Tripolyphosphate Matrices". Indonesian Journal of Chemistry 20, № 4 (2020): 929. http://dx.doi.org/10.22146/ijc.50449.

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This study aims to investigate the synthesis and characterization of β-carotene encapsulated in the blending matrices of starch (native and hydrolyzed starch)-chitosan/TPP (tripolyphosphate) by examining the effects of starch-to-chitosan weight ratio, β-carotene addition level, and TPP addition level on the encapsulation efficiency (EE) and loading capacity (LC); and to evaluate their storage stability. The encapsulation was done by the dropwise addition of ethanolic β-carotene dispersion into the blending matrices. The results of XRD analysis show that the encapsulation process significantly decreases the crystallinity of the starches, chitosan, and β-carotene. Scanning electron microscope (SEM) images reveal that the encapsulation products form irregular lumps. The EE and LC tend to increase with the increase in polymer fraction of matrices and β-carotene addition level, and with the decrease in TPP addition level. The addition of chitosan and the replacement of native starch by hydrolyzed starch tend to increase storage stability of β-carotene encapsulated in the starch matrix because chitosan can act as a good film-forming and antioxidant, while hydrolyzed starch contains amylose amylopectin with a short chain which is better in film-forming ability. These results promote the use of the hydrolyzed starch-chitosan/TPP as a matrix to enhance the stability β-carotene via encapsulations.
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Reis, Catarina, R. J. Neufeld, António Ribeiro, and Francisco Veiga. "Design of insulin-loaded alginate nanoparticles: Influence of the calcium ion on polymer gel matrix properties." Chemical Industry and Chemical Engineering Quarterly 12, no. 1 (2006): 47–52. http://dx.doi.org/10.2298/ciceq0601047r.

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Alginate-based nanoparticles were produced by dispersing alginate aqueous solution containing an insoluble calcium salt within mineral oil forming a water-in-oil emulsion. Subsequently, alginate gelled upon contact with the calcium ions due to the physical cross-linking between the carboxylate anions of the alginate and the calcium ions. The influence of the calcium salt, added in varying amounts, on gel integrity and on particle size was investigated. The efficiency of encapsulating active biological compounds by nanoparticles was also assayed. The calcium concentration was seen to be a crucial parameter in particle production, influencing the particle size, the viscosity of the solutions at different stages of the emulsification/gelation process and, finally, the encapsulation efficiency. The most appropriate mass relation between calcium and alginate was 7% (w/w). Under this condition, the smallest mean diameter obtained was 2.604 ? 2.141 ?m combined with the narrowest range of particle sizes. The encapsulation efficiency of insulin was over 71 %. These previous characteristics appear to be best suited for producing small, well-dispersed and stable nanoparticles with high encapsulation of insulin. This particulate system may be considered as a promising carrier for the oral delivery of insulin.
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Moroz, Pavel, Geethika Liyanage, Natalia N. Kholmicheva, et al. "Infrared Emitting PbS Nanocrystal Solids through Matrix Encapsulation." Chemistry of Materials 26, no. 14 (2014): 4256–64. http://dx.doi.org/10.1021/cm501739h.

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Öngen, G. "Encapsulation of α-amylase in a starch matrix". Carbohydrate Polymers 50, № 1 (2002): 1–5. http://dx.doi.org/10.1016/s0144-8617(01)00366-6.

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Amoura, Makhlouf, Roberta Brayner, Mercedes Perullini, et al. "Bacteria encapsulation in a magnetic sol–gel matrix." Journal of Materials Chemistry 19, no. 9 (2009): 1241. http://dx.doi.org/10.1039/b820433k.

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Volodkin, Dmitry V., Alexander I. Petrov, Michelle Prevot, and Gleb B. Sukhorukov. "Matrix Polyelectrolyte Microcapsules: New System for Macromolecule Encapsulation." Langmuir 20, no. 8 (2004): 3398–406. http://dx.doi.org/10.1021/la036177z.

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Bazan, Guillermo C., Michelle L. Renak, and Benjamin J. Sun. "Encapsulation of Emissive Polymers within a Fluorinated Matrix." Macromolecules 29, no. 3 (1996): 1085–87. http://dx.doi.org/10.1021/ma951429r.

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A. Zielinski, Beth, and Patrick Aebischer. "Chitosan as a matrix for mammalian cell encapsulation." Biomaterials 15, no. 13 (1994): 1049–56. http://dx.doi.org/10.1016/0142-9612(94)90090-6.

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Dissertations / Theses on the topic "Matrix encapsulation"

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Liyanage, Geethika Kaushalya. "Infrared Emitting PbS Nanocrystals through Matrix Encapsulation." Bowling Green State University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1403953924.

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Kinder, Erich W. "Fabrication of All-Inorganic Optoelectronic Devices Using Matrix Encapsulation of Nanocrystal Arrays." Bowling Green State University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1339719904.

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Shiman, Dmitriy I., Vladimir Sayevich, Christian Meerbach, et al. "Robust Polymer Matrix Based on Isobutylene (Co)polymers for Efficient Encapsulation of Colloidal Semiconductor Nanocrystals." American Chemical Association, 2019. https://tud.qucosa.de/id/qucosa%3A74322.

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We introduce new oxygen- and moisture-proof polymer matrixes based on polyisobutylene (PIB) and its block copolymer with styrene [poly(styrene-block-isobutylene-blockstyrene), PSt-b-PIB-b-PSt] for the encapsulation of colloidal semiconductor nanocrystals. In order to prepare transparent and processable composites, we developed a special procedure of nanocrystal surface engineering including ligand exchange of parental organic ligands to inorganic species followed by the attachment of specially designed short-chain PIB functionalized with an amino group. The latter provides excellent compatibility of the particles with the polymer matrixes. As colloidal nanocrystals, we chose CdSe nanoplatelets (NPLs) because they possess a large surface and thus are very sensitive to the environment, in particular in terms of their limited photostability. The encapsulation strategy is quite general and can be applied to a wide variety of semiconductor nanocrystals, as demonstrated on the example of PbS quantum dots. All obtained composites exhibited excellent photostability, being tested in a focus of a powerful white-light source, as well as exceptional chemical stability in a strongly acidic media. We compared these properties of the new composites with those of widely used polyacrylate-based materials, demonstrating the superiority of the former. The developed composites are of particular interest for application in optoelectronic devices, such as color-conversion light-emitting diodes, laser diodes, luminescent solar concentrators, etc.
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Nemchinov, Alexander. "Using Colloidal Nanocrystal Matrix Encapsulation Technique for the Development of Novel Infrared Light Emitting Arrays." Bowling Green State University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1339806993.

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Fakhouri, Abdulaziz Saud W. "High Throughput 3D Hydrogel Cell and Tissue Encapsulation Assay to Measure Matrix Metalloproteinase and Metabolic Activity." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1555518371350346.

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Bongur, Raphaël. "Encapsulation de molécules organiques au sein de silices mésoporeuses." Thesis, Mulhouse, 2010. http://www.theses.fr/2010MULH4272/document.

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L’objectif de cette thèse est de développer un concept inédit permettant l’utilisation de silices mésoporeuses pour encapsuler des principes actifs cosmétiques de façon permanente, ce qui permet d’améliorer leur tolérance cutanée, d’optimiser leur stabilité à la lumière tout en préservant leur efficacité et de faciliter leur formulation au sein de produits cosmétiques. Pour cela, la voie consistant à encapsuler des filtres UV à usage cosmétique au sein de silices mésoporeuses de type MCM-41 de façon in-situ a été choisie car elle semblait la plus propice à l’encapsulation d’une grande quantité de principes actifs de façon permanente. Deux filtres UV ont été étudiés un lipophile, nommé Parsol MCX, et un hydrophile, appelé Parsol HS. Pour l’ensemble des principes actifs étudiés, un taux d’encapsulation approprié a été obtenu et les caractérisations, effectuées notamment par RMN du solide, ont permis de montrer que l’encapsulation est effective au sein des pores ce qui, couplé à la bonne stabilité de l’encapsulation dans le cas de l’actifs hydrophile, garantit un contact minimum entre l’actif et la peau du consommateur. En revanche, un relargage important de filtre UV lipophile a été constaté. Il a été établi que les propriétés physico-chimiques des matériaux diffèrent significativement suivant que les principes actifs encapsulés soient lipophiles ou hydrophiles. Dans tous les cas, l’organisation poreuse, l’ordre structural et la morphologie des particules contenant des principes actifs varient significativement par rapport aux silices mésoporeuses de référence de type MCM-41, synthétisées sans principe actif. La présence de principe actif au sein du milieu réactionnel a donc une influence sur la structure et la texture des matériaux obtenus, ce qui est dû aux interactions entre les molécules de principe actif, les espèces silicate et les molécules de tensioactif au sein du milieu réactionnel<br>The objective of this thesis is to develop a new concept that consists to permanently encapsulate cosmetic active ingredients into mesoporous silica. The encapsulation of these active molecules improves their skin tolerance, optimizes their light stability while preserving their effectiveness and facilitates their formulation in cosmetic products. Thus, UV filters have been encapsulated in MCM-41 type mesoporous silica by using in-situ route because it seemed the most efficient route to achieve permanently encapsulation of large quantities of active. Two UV filters have been studied. One is lipophilic (Parsol MCX) and the other is a hydrophilic (Parsol HS). For all the active molecules studied, an appropriate encapsulation rate was obtained and the characterizations, particularly these performed by solid-state NMR, have shown that the encapsulation is effective within the pores which, coupled with the good stability of encapsulation in the case of hydrophilic actives, ensures minimal contact between the active and the consumer's skin. In contrast, a significant release of lipophilic UV filter was found. It was established that the physico-chemical properties of the synthesized materials differ significantly according to the lipophilic or hydrophilic nature of the encapsulated molecules. In all cases, the porous organization, the structural order and the morphology of the particles containing active ingredients vary significantly compared to the reference MCM-41 type mesoporous silica, synthesized without active ingredient. Thus, the presence of the active ingredient in the reaction medium has an influence on the structure and the texture of the synthesized materials, which is due to interactions between the actives molecules, the silicate species and the surfactant molecules in the reaction medium
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Hussein, Oday. "Composite cement systems for encapsulation of barium sulphate scale from oil industry and application as high density support matrix." Thesis, University of Sheffield, 2013. http://etheses.whiterose.ac.uk/4797/.

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Radioactive barium sulphate scales raise a serious concern in the oil and gas industries. They are often classified as low level radioactive waste, but there are no clear methodologies established world widely to deal with this well know issue. The present study investigates a potential use of composite cement systems based on Portland cement to encapsulate the barium sulphate scales, aiming to provide a feasible option for safe handling, storage and disposal. The investigation was conducted on three different aspects: basic formulation, wasteform development and potential use as a high density support matrix. The first part studied the basic formulation to clarify the impact of BaSO4 loading and water contents on the physical properties of the composite cementing system. Fine BaSO4 powders and excess water were found to influence the product phases whereas coarse BaSO4 particles showed larger impact on strength of the products. The second part investigated the effect of mineral admixtures to develop practical wasteform formulations. Fine BaSO4 powder, metakaolin and quartz were found to improve the workability of the pastes as well as the microstructure by eliminating highly porous interfacial transition zone, resulting in the higher compressive strength and reasonable leaching rates of elements. Addition of quartz was found to be most effective to minimise the degradation caused by the high temperature environment, by initiating the formation of stable tobermorite phase.
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Castro, Gutierrez Natalia. "Incorporation and release of organic volatile compounds in a bio-based matrix by twin-screw extrusion." Phd thesis, Toulouse, INPT, 2016. http://oatao.univ-toulouse.fr/16006/1/Castro_Natalia.pdf.

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Nowadays, scientific and political communities are focused on ways to better preserve and manage the natural resources of our planet. In order to reduce consumption of fossil resources, and to develop more environmentally friendly industrial processes, the industry of flavors and fragrances became interested in developing new bio-based encapsulating materials. In the present work, maltodextrins have been chosen as main component of the matrix, and pea protein isolate and a modified starch were selected as compatibilizing additives. The incorporation of volatile odorant compounds and the elaboration of the new bio-based delivery systems were performed, all in one single step, by low temperature twin-screw extrusion. The physicochemical, thermal and morphological properties of these matrices were studied, as well as the encapsulation efficiency and the release profile of the active compounds. These investigations have led to a better understanding of the impact of the formulations and of the incorporation of the active compound on the process parameters. The interactions between the wall and the encapsulated materials were also analyzed. The characteristics of the new bio-based delivery systems and the established extrusion process conditions were found to be very promising to be employed in the field of perfumery.
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Bahri-Hammami, Asma. "Développement d'une nouvelle stratégie d'encapsulation de molécules bioactives hydrophobes basée sur la dynamique des micelles de caséines." Thesis, Montpellier, 2017. http://www.theses.fr/2017MONTT121.

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De nombreux composés bioactifs hydrophobes sont actuellement mis en avant en raison de leurs propriétés nutritionnelles et fonctionnelles. Une attention particulière est, en conséquence, portée à leur incorporation en tant qu'ingrédients dans des aliments fonctionnels. Cependant, la majorité de ces composés bioactifs sont caractérisés par une faible solubilité en milieu aqueux, une dégradation au cours des procédés de transformation ainsi qu'une absorption limitée au niveau du tractus gastro-intestinal. La micelle de caséines, grâce à ses propriétés fonctionnelles uniques, peut être considérée comme un support d’encapsulation naturel pour ces molécules bioactives hydrophobes. En effet, une des originalités de cette suprastructure est sa dynamique dans le lait se caractérisant par des échanges réversibles de protéines et de minéraux entre le sérum et la structure micellaire interne en fonction des conditions physicochimiques, et notamment avec la température. En particulier, un stockage du lait à 4°C permet la dissociation sélective de la caséine β de la phase micellaire vers la phase soluble et un retour à température ambiante permet sa réintégration. L’objectif de cette thèse est de développer une nouvelle stratégie d’encapsulation de molécules bioactives hydrophobes dans les micelles de caséines via cette dynamique de la caséine β. Dans un premier temps, l’optimisation de la dissociation de la caséine β de la micelle de caséines a été réalisée en modifiant la température et le pH, tout en portant une attention particulière au maintien de l’intégrité des micelles déplétées en caséines β. Un procédé de séparation physique de la caséine β solubilisée a été optimisé par microfiltration à l’échelle pilote. Une étude de la concentration micellaire critique de la caséine β a permis de vérifier son état monomérique à l’issue de cette séparation. Une étude de la cinétique d’interaction entre la caséine β monomérique et deux composés bioactifs hydrophobes, la curcumine et la vitamine D3, a ensuite été réalisée par résonance plasmonique de surface et par spectroscopie de fluorescence. La curcumine a été choisie pour la suite de l’étude au vu de sa bonne affinité pour la caséine β. Le complexe caséine β monomérique-curcumine a ensuite été encapsulé dans des micelles de caséines préalablement déplétées en caséines β. Les résultats de ces travaux montrent l’efficacité de cette stratégie d’encapsulation qui peut présenter un intérêt particulier pour la vectorisation de molécules bioactives hydrophobes afin d’assurer leur protection dans des produits laitiers pauvres en matière grasse.De plus, au cours de ce projet, une méthode de caractérisation des propriétés morphologiques et nano-mécaniques des micelles de caséines par microscopie à force atomique en milieu liquide a été développée. Cette méthode représente un outil intéressant de compréhension de la structure micellaire dans son environnement natif et offre la possibilité d’évaluer l’impact de certaines modifications sur les propriétés de la micelle de caséines, comme sa déplétion en caséine β ou sa réticulation<br>In the last years, the number of studies highlighting the nutritional and functional properties of several hydrophobic bioactives has markedly increased. Special attention is consequently paid to their addition as ingredients to food. However, most of these hydrophobic compounds display a low aqueous solubility, poor stability during processing and low absorption in the gastrointestinal tract. Casein micelles exhibiting unique set of properties can be considered as a natural nanocarrier for these molecules. Actually, changes in environmental factors namely pH and temperature induce the dissociation of caseins and minerals from the colloidal phase to the soluble phase. Particularly, a selective dissociation of β-casein occurs at low temperatures. This effect is reversed with an increase in temperature, with a transfer of β-casein from the serum to the micelles when equilibrated at room temperature. The aim of this study is to develop a novel encapsulation strategy to incorporate hydrophobic bioactive compounds into casein micelles using the β-casein reversible dissociation. First, the β-casein dissociation from casein micelles was optimized by temperature and pH modifications while preserving the integrity of the β-casein depleted casein micelles. The separation of dissociated β-caseins from casein micelles was carried out by microfiltration at a pilot scale. The β-casein critical micelle concentration was concurrently evaluated to ensure the monomeric state of -casein after separation. Secondly, the binding kinetic between monomeric β-casein and two hydrophobic compounds, curcumin and vitamin D3, was investigated by surface plasmon resonance and fluorescence spectroscopy. Curcumin was then selected thanks to its high affinity to -casein β. The complex monomeric β-casein – curcumin was encapsulated in β-casein depleted casein micelles. The results of this study show the efficiency of this encapsulation strategy of hydrophobic bioactive compounds, which could be used to protect such molecules in low fat dairy products.Besides, during this project, a novel strategy was developed in order to evaluate the casein micelle topography and nanomechanical properties by atomic force microscopy in liquid environment. This method opens a new line of investigation to better understand the casein micelle structure in its native environment but also investigate the impact induced by the modification of physico-chemical conditions on its topography and elastic properties
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Plouzeau, Maud. "Mélanges matrice polymère / molécules optiquement actives Etude, optimisation de la compatibilité et amélioration de leur tenue lumière." Thesis, Le Mans, 2017. http://www.theses.fr/2017LEMA1043.

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La société CASCADE a été créée pour industrialiser des technologies dites à « cascades lumineuses ». Le principe de ces « cascades lumineuses » consiste à réaliser un ou plusieurs décalages de fréquences lumineuses (ou électromagnétiques) en dopant une matrice polymère transparente par intégration de molécules optiquement actives (MOA), permettant d’adapter le spectre solaire à la photosynthèse et à la fonction chlorophyllienne des plantes. Un intérêt majeur pour les cultures sous serres d’utiliser des films agricoles dopés avec les MOA est de favoriser la précocité des récoltes ou d’accroître la quantité en poids des végétaux récoltés, sans en altérer leur qualité. Les polymères utilisés aujourd’hui dans les films agricoles sont le polyéthylène (PE) et le copolymère poly(éthylène-co-acétate de vinyle) (EVA) dans lesquels les MOA ne sont pas suffisamment stabilisées pour une application industrielle. L’objectif de la thèse vise donc à améliorer la tenue temporelle des MOA dans les matrices polymères PE/EVA par différentes stratégies : (i) l’étude de l’influence de la nature et de la topologie de la matrice polymère, (ii) l’optimisation des formulations existantes par ajout d’additifs ou de compatibilisants et (iii) l’encapsulation des MOA dans des particules de PMMA (non)-réticulées<br>The CASCADE company was founded to develop technology said to “light cascades”. These “light cascades” consist of incorporating an appropriate combination of optically active molecules (OAM) into host materials allowing wavelength-shifting effects to optimize the quality and quantity of direct and diffuse sunlight. When such OAM combination is introduced into greenhouse films, an increase of agronomic yields and early crop are observed. Such behavior is due to the fact that OAM allow to adapt the solar spectrum to the photosynthesis and the chlorophyll function of plants. Greenhouse films are based on polyethylene (PE) and/or poly(ethylene-co-vinyl acetate) (EVA) copolymers. When OAM are introduced within such host polymers, their optically efficiency is limited for long term industrial applications. Therefore, the thesis goal is to improve the OAM lightfastness into PE/EVA polymer matrix by different strategies: (i) the study of polymer matrix nature and topology influence, (ii) the optimization of current formulations by additives or compatibilizers adding and (iii) the OAM encapsulation into (un)-crosslinked PMMA particles
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Books on the topic "Matrix encapsulation"

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Canada, Atomic Energy of. Lead-matrix encapsulation of a CANDU fuel bundle. Atomic Energy of Canada Limited, 1990.

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Book chapters on the topic "Matrix encapsulation"

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Chauhan, Ajay Kumar, Rahul Saini, and Pawan Kumar. "Encapsulation of Antioxidants Using Casein as Carrier Matrix." In Nanotechnology Applications in Dairy Science. Apple Academic Press, 2019. http://dx.doi.org/10.1201/9780429425370-10.

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Timbert, R., J. N. Barbotin, and D. Thomas. "Choice of the Matrix for Encapsulating and Dehydrating Carrot Somatic Embryos: Importance of the Rheology, the Desorption and the Diffusion Parameters." In Basic and Applied Aspects of Seed Biology. Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-5716-2_7.

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Pérez-Monterroza, Ezequiel José, Ana María Chaux-Gutierrez, Célia Maria Landi Franco, and Vânia Regina Nicoletti. "ENCAPSULATION OF BIXIN IN STARCH MATRIX USING ULTRASOUND." In Ciência e Tecnologia de Alimentos: pesquisa e práticas contemporâneas. Editora Científica Digital, 2021. http://dx.doi.org/10.37885/210504722.

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O. Ilomuanya, Margaret, Ibilola M. Cardoso-Daodu, Uloma N. Ubani-Ukoma, and Adannaya C. Adebona. "Polymeric Biomaterials for Wound Healing Incorporating Plant Extracts and Extracellular Matrix Components." In Wound Healing [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.98556.

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Biomaterials are constructed to promote or stimulate the processes of wound healing. Polymeric biomaterials can be used to hydrate the wound and serve as barrier to pathogens with plant extracts, antimicrobial agents and extracellular components incorporated to stimulate the healing process. The biological and physical augmentation provided by extracellular matrix derived implants continues facilitate innovation in biomaterials utilized in management of nonhealing wounds. Tissue-processing methodologies can birth extracellular matrix-based devices with characteristic post-implantation responses ranging from the classic foreign body encapsulation of a permanent implant, to one where the implant is degraded and resorbed, to one where the processed extracellular matrix implant is populated by local fibroblasts and supporting vasculature to produce, a viable and metabolically active tissue. Extracellular matrix components and plant extracts have been shown to possesses pharmacological properties with potential for use in the treatment of skin diseases and wound healing. Antioxidant, anti-inflammatory assays, and wound healing assays have been shown to support the dermatological and wound healing usage of these medicinal plants extracts.
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Boonmahitthisud, Anyaporn. "Natural Rubber and Rubber Blend Nanocomposites." In Applied Environmental Materials Science for Sustainability. IGI Global, 2017. http://dx.doi.org/10.4018/978-1-5225-1971-3.ch004.

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Natural rubber (NR) is representative biomass polymer and the effective uses are strongly contributed to sustainable society. This chapter presents the innovative and advanced rubber nanocomposites with polystyrene-encapsulated silica nanohybrids (PS-nSiO2) subsequently used as a nanofiller for NR and NR/styrene butadiene rubber (NR/SBR). The PS-nSiO2 were prepared via ‘in situ' differential microemulsion polymerization. The core-shell nanohybrids of PS-nSiO2 were achieved with an average diameter of 40 nm using a smaller amount of surfactant, compared to microemulsion polymerization method. Moreover, the effects of the NR and NR/SBR filled with PS-nSiO2 nanohybrids on the mechanical properties, thermal stability, flammability and morphology are also discussed. The results indicated that the encapsulation of nSiO2 with PS can provide not only the well-dispersion of nanoparticles in the rubber matrix but also the synergistic properties of two components from the polymer and the inorganic nanoparticles by improving mechanical properties, thermal stability and flammability of rubber nanocomposites.
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Simpson, Michael L., and Timothy E. McKnight. "The Biology of Integration of Cells into Microscale and Nanoscale Systems." In Cellular Computing. Oxford University Press, 2004. http://dx.doi.org/10.1093/oso/9780195155396.003.0013.

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In chapter 5 we focused on the informational interface between cells and synthetic components of systems. This interface is concerned with facilitating and manipulating information transport and processing between and within the synthetic and whole-cell components of these hybrid systems. However, there is also a structural interface between these components that is concerned with the physical placement, entrapment, and maintenance of the cells in a manner that enables the informational interface to operate. In this chapter we focus on this structural interface. Successful integration of whole-cell matrices into microscale and nanoscale elements requires a unique environment that fosters continued cell viability while promoting, or at least not blocking, the information transport and communication pathways described in earlier chapters. A century of cell culture has provided a wealth of insight and specific protocols to maintain the viability and (typically) proliferation of virtually every type of organism that can be propagated. More recently, the demands for more efficient bioreactors, more compatible biomedical implants, and the promise of engineered tissues has driven advances in surface-modification sciences, cellular immobilization, and scaffolding that provide structure and control over cell growth, in addition to their basic metabolic requirements. In turn, hybrid biological and electronic systems have emerged, capable of transducing the often highly sensitive and specific responses of cellular matrices for biosensing in environmental, medical, and industrial applications. The demands of these systems have driven advances in cellular immobilization and encapsulation techniques, enabling improved interaction of the biological matrix with its environment while providing nutrient and respiratory requirements for prolonged viability of the living matrices. Predominantly, such devices feature a single interface between the bulk biomatrix and transducer. However, advances in lithography, micromachining, and micro-/nanoscale synthesis provide broader opportunities for interfacing whole-cell matrices with synthetic elements. Advances in engineered, patterned, or directed cell growth are now providing spatial and temporal control over cellular integration within microscale and nanoscale systems. Perhaps the best defined integration of cellular matrices with electronically active substrates has been accomplished with neuronal patterning. Topographical and physicochemical patterning of surfaces promotes the attachment and directed growth of neurites over electrically active substrates that are used to both stimulate and observe excitable cellular activity.
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Conference papers on the topic "Matrix encapsulation"

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Naz, Muhammad Yasin, Shaharin Anwar Sulaiman, Mohd Hazwan Bin Mohd Ariff, and Bambang Ariwahjoedi. "Urea encapsulation in modified starch matrix for nutrients retention." In 3RD INTERNATIONAL CONFERENCE ON FUNDAMENTAL AND APPLIED SCIENCES (ICFAS 2014): Innovative Research in Applied Sciences for a Sustainable Future. AIP Publishing LLC, 2014. http://dx.doi.org/10.1063/1.4898485.

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Li, Chun Liang, and Norio Murase. "Encapsulation of CdTe semiconductor nanocrystals in glass matrix by a sol-gel process." In Integrated Optoelectronic Devices 2004, edited by Diana L. Huffaker and Pallab Bhattacharya. SPIE, 2004. http://dx.doi.org/10.1117/12.530635.

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Reátegui, Eduardo, Lisa Kasinkas, and Alptekin Aksan. "Encapsulation of Mammalian Cells in Nanoporous Silica Gels: Interactions at the Biointerface." In ASME 2012 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/sbc2012-80211.

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Encapsulation of cells in nanoporous silica gels has shown great potential for the development of biotechnology applications such as biosensors, biocatalysis, bioremediation, energy conversion systems, and cellular therapies [1]. However, even though the inorganic matrix confers improved mechanical properties, chemical and thermal stability, and is resistant to microbial attacks, long-term viability and function after encapsulation remains as one of the principal setbacks of this technology [2].
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Alkim, Erdem, and Bilge Kagan Yazar. "Post Quantum Learning With Errors Problem Based Key Encapsulation Protocols and Matrix Vector Product." In 2019 4th International Conference on Computer Science and Engineering (UBMK). IEEE, 2019. http://dx.doi.org/10.1109/ubmk.2019.8907201.

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Moro, Lorenza L., Todd A. Krajewski, Nicole M. Rutherford, et al. "Process and design of a multilayer thin film encapsulation of passive matrix OLED displays." In Optical Science and Technology, SPIE's 48th Annual Meeting, edited by Zakya H. Kafafi and Paul A. Lane. SPIE, 2004. http://dx.doi.org/10.1117/12.506549.

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Lundquist, Charles M., Christopher H. Loo, Aaron Mack, Jianhua Gu, Jim A. Bankson, and Rita E. Serda. "Porous Silicon-Superparamagnetic Iron Oxide Complexes and Impact on Negative Contrast Enhancement in MRI." In ASME 2013 2nd Global Congress on NanoEngineering for Medicine and Biology. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/nemb2013-93065.

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Purpose: Encapsulation of contrast agent within a nanoporous matrix has been shown to enhance contrast performance. Previous investigators have shown an up to 40-fold increase in T1 image contrast enhancement of gadolinium with encapsulation in carbon nanotubes. In this study we examined silicon encapsulation as a means of contrast enhancement in superparamagnetic iron oxide nanoparticles (SPIONs) using a particle-agarose phantom. Methods: 1μm discoidal pSi particles were loaded with 30 nm SPIONs through capillary action. Loaded particle preparations along with free SPION controls were homogeneously distributed within an agarose substrate and imaged using a 7-tesla small-bore MRI. ICP-AES was used to determine the concentration of free elemental iron in sample preparations. Results: Silicon encapsulation of 30nm SPIONs did not result in a clinically significant enhancement of negative contrast (T2 and T2*) in MRI. However, it is unclear the extent to which limited diffusion of water protons, both through silicon encapsulation and the use of an agarose substrate, counteracts the theoretical increase in relaxivity due to aggregation.
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Robertson, Daniel, Stephen Burnley, and Rod Barratt. "The Immobilisation of Flue Gas Treatment Residues Through the Use of a Single Staged Wash and Crystalline Matrix Encapsulation (CME) Treatment Process." In 11th North American Waste-to-Energy Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/nawtec11-1679.

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All incineration and other thermal treatment technologies produce flue gas treatment residues (FGTR) that require specialised treatment and disposal. In the United Kingdom the FGTR arising from municipal solid waste incineration is classified as a hazardous (special) waste. This is primarily due to the irritant properties of chloride, but also due to the content of heavy metals. These wastes must be handled, transported &amp; disposed of in accordance with the Special Waste Regulations 1996 and are disposed into highly engineered landfill sites, which isolate the material from the environment. The low levels of trace elements in the FGTR mean that the recycling of the metallic elements is not economic. Control through stabilisation and encapsulation in a crystalline matrix converts the FGTR primary form from a powder into solid block form. The use of a novel metal matrix encapsulation (MME) process allows low level engineering processes to be employed, increasing a range of reuse options combined with long-term improved storage.
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Monifi, Faraz, Sahin Kaya Ozdemir, Lan Yang, and Jacob Friedlein. "Encapsulation of a microtoroid resonator side-coupled to a fiber taper into a polymer matrix." In 2012 IEEE Photonics Conference (IPC). IEEE, 2012. http://dx.doi.org/10.1109/ipcon.2012.6358780.

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Robertson, Daniel, and Rod Barratt. "A Toxicity Reduction Exercise for Municipal Solid Waste to Energy Fly-Ash Utilising a Separation, Isolation and Treatment Process." In 13th Annual North American Waste-to-Energy Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/nawtec13-3151.

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The current situation for fly ash management and policy regulation in the United Kingdom / European Union, has developed the need for new toxicity reduction exercises. New EU wide policies are changing the type of treatment methods that can be legally used for the residues from waste-to-energy plants. In particular the disposal of flue gas treatment residues, which are classified as a hazardous waste, will not be acceptable to landfill according to the Waste Acceptance Criteria without a pre-treatment by 2007. This has raised a number of interesting engineering questions that need to be addressed. The novel TRE of metal matrix encapsulation has been designed based upon the principles of separation, isolation and treatment to meet these new criteria. Metal matrix encapsulation is a treatment program that employs existing industrial infrastructure to improve its usability and legal compliance.
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Raza, Kabeer, Syed Sohail Akhtar, Abul Fazal M. Arif, and Abbas Saeed Hakeem. "Design of a Composite Encapsulation for Concentrated Photovoltaic Systems With Improved Performance." In ASME 2019 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/imece2019-11720.

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Abstract Most of the currently used encapsulants are inefficient for cooled concentrated photovoltaic (CPV) systems. The encapsulant of cells for CPV systems, must have an optimum combination of thermal conductivity, coefficient of thermal expansion and long term shear modulus. In this work an improved backside composite encapsulation is designed and developed that can provide increased power output and longer life by enhancing the effectiveness of cooling and reducing thermal stresses. The best combination of material properties is identified through parametric studies on finite element model of CPV laminate using ethylene vinyl acetate as datum line. It is found that increasing thermal conductivity from 0.311 to 0.75 W/mK can improve the cooling and hence the power production by 2%. While long term shear modulus and coefficient of thermal expansion needs to be reduced for a longer service life. Using in-house built material design codes, optimum combinations of matrix and filler were identified that could provide the set range of properties. In line with material design code, a total of only four samples using thermoplastic polyurethane as matrix and Al2O3 or AlN as fillers were synthesized to validate the design experimentally. The material properties were measured and used in the parent finite element model to evaluate the performance of the experimentally developed material and to validate the parametric studies. A good agreement is found between the experimental and computational results and hence the overall methodology is found effective for application focused design and development of composite materials. It is expected that this material design and development approach will provide a useful guideline to the CPV manufacturing industries.
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Reports on the topic "Matrix encapsulation"

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Knoll, R. W., E. D. McClanahan, G. L. Tingey, and E. L. McDonald. Development and selection of a matrix alloy for /sup 85/Kr encapsulation. Office of Scientific and Technical Information (OSTI), 1986. http://dx.doi.org/10.2172/5542334.

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