Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 247 for “"Capsules"”.
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Self-assembling molecular capsules
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1999.
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Hydraulic conveyance of solid capsules
… technology of hydraulic transportation of solid capsules in pipes is advanced to the point of practical feasibility by the development and successful operation of experimental equipment in the laboratory. This involves the innovation of aspects of the technology concerned, such as novel booster …
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Polymeric capsules for self-healing anticorrosion coatings
… and the active part, represented by micron-sized capsules loaded with corrosion inhibitor. Polymers were chosen as the class of compounds most suitable for the capsule preparation. The morphology of capsules made of crosslinked polymers, however, was found to be dependent on the nature of the …
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Novel applications of surface-modified sporopollenin exine capsules
The external shell (exine) of plant spores and pollen grains is composed of sporopollenin, which is an organic polymer renowned for its exceptional resistance to physical and chemical attack. The resilience of sporopollenin to high temperature, pressures, acidic and basic corrosion is proved by its …
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Covalent Post-Assembly Modification of Metal-Organic Capsules
… of singlet oxygen (1O2), whereas cobalt(II) capsules react fully and incorporate six equivalents of 1O2 . Structural changes following these reactions impacted the host-guest chemistry of the cobalt(II) cages, and binding studies using isothermal titration calorimetry are discussed. …
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Synthesis and single-molecule force spectroscopy of supramolecular capsules
… and self-assembly dynamics of supramolecular capsules based on cavitands and calix[4]arenes is investigated. In the first part, large supramolecular coordination cages have been prepared by metal-directed self-assembly of functionalized cavitands. The synthesis of the hexameric coordination …
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Pharmaceutical evaluation of phela capsules Used as traditional medicine
… the capsule manufacture. Thirdly, the Phela capsules produced were generally of acceptable pharmacopoeial standard. Fourthly, HPLC fingerprinting and pattern recognition analysis proved useful to examine the chemical stability of selected marker compounds of Phela and indicated that the …
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Electrohydrodynamic Simulations of the Deformation of Liquid-Filled Capsules
… the electrohydrodynamic simulation of deformable capsules is provided. The role of a direct current (DC) electric field on the deformation and orientation of a liquid-filled capsule is thoroughly considered numerically. This framework is based on lattice Boltzmann method for the fluid, finite …
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Ingestible capsules for therapeutic injections in the gastrointestinal tract
… uptake. In this thesis I will describe two oral capsules designed to systemically deliver macromolecules by inserting the drugs directly into the walls of the gastrointestinal tract. One device is designed to deliver to the stomach wall, while the other device is designed to deliver to the wall …
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Interactions and reaction within synthetic self-assembling molecular capsules
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1997.
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Biodegradable, Liquid-Filled, Spherical Capsules With Pre-Determined Burst Times
… and evaluation of spherical rupturable osmotic capsules.
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Cucurbiturils, tetrahedral capsules, and porous systems: synthesis, functionalization, and applications
Taking a cue from the principles developed by the founding fathers of supramolecular chemistry, the PhD program consists of four lines of research that develop in a multidisciplinary plan starting from alternative and more environmentally friendly synthesis methodologies. During the first year a …
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Multilayer capsules with stimuli-sensitive properties : pH-response and carbohydrate-sensing
Polyelectrolyte microcapsules containing stimuli-responsive polymers have potential applications in the fields of sensors or actuators, stimulable microcontainers and controlled drug delivery. Such capsules were prepared, with the focus on pH-sensitivity and carbohydrate-sensing. First, …
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Nano chemistry : large molecular capsules and coordination networks based on self-assembly
… include unprecedented bis-molecular capsules, coordination polymer chains and 3-D networks.
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Introduction of a thermo-sensitive non-polar species into polyelectrolyte multilayer capsules for drug delivery
… applications. Multilayered polyelectrolyte microcapsules are also of great interest due to their possible use as microcontainers. This work will present two methods that can be used as employable drug delivery systems, both of which can encapsulate an active molecule and tune the release …
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The escape of veligers from the egg capsules of Nassarius obsoletus and Nassarius trivittatus (gastropoda, prosobranchia)
… gastropod deposit their eggs in tough capsules affixed to hard substrates. Generally, there is a small opening near the top of such capsules, occluded by a firm plug (operculum) which must be removed before the veligers can escape. Although the removal of the operculum is generally …
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Are Mussel Shells Environmental DNA Time Capsules? A Comparison Of Extraction Methods For Obtaining DNA From Shell Material.
<p>Freshwater mussels have become some of the most imperiled species in North America and widespread populations have succumbed to pollution and many other anthropogenic-related factors. With molecular techniques evolving, a recent interest in ancient DNA and museum specimens has emerged and …
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Coupling Computationally Expensive Radiative Hydrodynamic Simulations with Machine Learning for Graded Inner Shell Design Optimization in Double Shell Capsules
High energy density experiments rely heavily on predictive physics simulations in the design process. Specifically in inertial confinement fusion (ICF), predictive physics simulations, such as in the radiation-hydrodynamics code xRAGE, are computationally expensive, limiting the design process and …
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Wasps (Hymenoptera: Chalcidoidea) associated with galls in seed-capsules of Eucalyptus camaldulensis (Myrtaceae) in South Africa : species composition, trophic relationships and effects
… both regarded as gall inducers, in the seed capsules of E. camaldulensis in South Africa. The current study was motivated by the need for information on the biology of these two species and the effect they were having on seed production in their host plant. As it progressed, three more …
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