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 20 for “"EMFs"”.
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Synthesis and Functionalizations of Trimetallic Nitride Template Endohedral Metallofullerenes (TNT-EMFs)
… contrast agents and nuclear medicine. The TNT-EMFs have inherent advantages over other endohedral metallofullerenes, such as M@C60 and M@C82, due to the encapsulation of up to three metal atoms inside the carbon cages. M3N@C80(OH)m(O)n (M = Sc, Gd, Ho) were synthesized under the HSVM condition …
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Synthesis, Isolation, and Characterization of Tb-based Large Cage TNT-EMFs and Dimetallic Endohedral Metalloazafullerenes
A family of novel large cage Tb-based TNT-EMFs Tb₃N@C<sub>2n</sub> (40 ≤ n ≤ 44), and a family of novel dimetallic endohedral metalloazafullerenes with the molecular formula of M₂@C₇₉N (M=Y, Tb, and La), were for the first time systematically synthesized, isolated, and structurally characterized. …
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The Corporate Character of Eudaimonist Virtue Ethics Cautioning the Invisible Environment of Harmful EMFs Resulting from 5G Technology
… namely, do the electromagnetic frequencies (EMFs) linked to the development of technology of 4G and 5G cause harm to the environment (e.g., plants, bees and other insects, the animal kingdom, and human beings)? Do EMFs cause or correlate to the collapse of bee colonies and/or lower sperm …
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Chemical Reactivity and Regioselectivity of Trimetallic Nitride Endohedral Metallofullerenes
… template endohedral metallofullerenes (TNT EMFs) are some of the most promising fullerene-based materials (e.g., as MRI and X-ray contrast agents) because of their high yields compared to classic endohedral metallofullerenes. This dissertation addresses the chemical reactivity and …
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Yttrium, Gadolinium, and Lutetium Based Endohedral Metallofullerenes: From Synthesis to Application
Endohedral metalofullerenes (EMFs) have emerged as an important class of nanomaterials with vast promise in applications of molecular devices and nanomedicines. This dissertation addresses the EMF research span from synthesis to application, with an emphasis of work on trimetallic nitride template …
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Preparation, Separation, Characterization and Hydrogenation of Endohedral Metallofullerenes
Endohedral metallofullerenes (EMFs) have attracted increasing attention during past decades due to their novel structures and potential applications in a variety of fields such as biomedical applications and molecular electronics. This dissertation addresses the structural characterization and …
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An evaluation of the implementation of the normative objectives set for Environmental Management Frameworks in selected case studies in Gauteng and the Northwest Province, South Africa
… of these Environmental Management Frameworks (EMFs): the City of Tshwane Metropolitan Municipality’s Zone of Choice EMF, Ekurhuleni Metropolitan Municipality’s EMF and the Tlokwe Municipality’s EMF. The objectives include the provision of a mechanism and decision support tool for the study area …
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The hidden price of power
… Fields (hereinafter referred to as EMFs) . Here will not be the place to try to establish categorical connections between ill health and EMFs, instead the writer will mention the major studies and writings in this area and then proceed to draw together the current laws which are …
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UNRAVELLING MECHANISMSOF SCHWANN CELLS IN VESTIBULAR SCHWANNOMA AND THEIR IMPACT ON HEARING LOSS.
… cues such as electromagnetic fields (EMFs) have been suggested as one of the potential co-factor influencing SC behaviour, but their cellular impact and the molecular mechanisms behind their action are still poorly understood. In this regard, this thesis investigates the molecular and …
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The Preparation, Functionalization and Biomedical Applications of Carbonaceous Nanomaterials
… template endohedral metallofullerenes (TNT-EMFs, M₃N@C₈₀, M = Gd, Lu, etc.) are some of the most promising materials for biomedical applications. Water-soluble Gd₃N@C₈₀ was prepared by the functionalization with poly(ethylene glycol) (PEG) and hydroxyl groups (Gd₃N@C₈₀[DiPEG(OH)ₓ]). The …
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Shearing waves and the MRI dynamo in stratified accretion discs
… and characterise the resultant quasi-linear EMFs as a function of height above the midplane. We combine this with an analytic description of the linear modes under an assumption of a poloidal-toroidal scale separation. Finally, we use RAMSES to perform full MHD simulations in a zero net flux …
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Computational Study of the Properties and Stabilities of Endohedral Metallofullerenes
… to the selective stability of certain isomers of EMFs. Computational treatments of the anions of C80 and C94 are presented and compared in an effort to gain an understanding and predictive model for which isomers of each cage size EMF will be most stable. A model is proposed in which the pentagons …
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Direct Back EMF Detection Method for Sensorless Brushless DC (BLDC) Motor Drives
… voltage is not needed to measure the back EMFs. The true back EMF of the floating motor winding can be detected during off time of PWM because the terminal voltage of the motor is directly proportional to the phase back EMF during this interval. Also, the back EMF voltage is referenced to …
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Electromagnetic stimulation of a composite scaffold for wound healing
… radicals. Meanwhile, electromagnetic fields (EMFs) have been explored as an adjunct therapy for chronic wounds due to clinical evidence of wound healing enhancement. This dissertation investigated the incorporation of all three in the design and evaluation of an electromagnetically-stimulated …
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Gadolinium Endohedral Metallofullerenes for Future Magnetic Resonance Imaging Contrast Agents
Gadolinium endohedral metallofullerenes (EMFs) have shown the potential to become next generation magnetic resonance imaging (MRI) contrast agents due to their significantly improved efficiency and safety, as well as multi-day body retention which allows for a longer surgery and observation …
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Development of the gel plating process for selective gold metallization
… At 60 °C, it was found that k = 1.5 x 10-6 emfs and D = 4 x 10·7 cm2/s. At 50 °C, it was found that k = 3 x 10·6 emfs and D = 2 x 10·7 cm2/s. The thickening agent was found to decrease both the reaction rate constant for the cathodic reaction at the plating surface and the diffusivity of the …
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STUDY OF PHYSIO-PATHOLOGICAL MECHANISMS AT THE BASE OF SCHWANNOMA DEVELOPMENT
… devices. In fact, it was suggested that EMFs can induce cellular changes towards non-physiological behavior, that may be pathologically relevant to the development of schwannoma. Overall, in this work of thesis we focused our attention on the investigation of putative genes, pathways, and …
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Fullerene Based Nanomaterials for Biomedical Applications
… we aim to develop a series of functionalized TNT-EMFs for MRI detection of various pathological conditions, such as brain cancer, chronic osteomyelitis, and gastrointestinal (GI) tract. As a general introduction, Chapter 1 briefly introduces recent progress in developing metallofullerenes for …
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Generation of Heptagon-Containing Fullerene Structures by Computational Methods
Since the discovery three decades ago, fullerenes as well as metallofullerenes have been extensively investigated. However, almost all known fullerenes follow the classical definition, that is, classic fullerenes are comprised of only pentagons and hexagons. Nowadays, more and more evidence, from …
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Fullerenes and carbon nanostructures formation in flames
… 0.96); cold gas velocity at the burner, 25 emfs; pressure, 40 torr; and fraction of argon in fuel mixture, 10 mol%. Concentrations of C6o, C10, C16, C1s, and C84 and 14 P AH were measured at different axial distances (residence times) in the flame, and an additional 16 PAH were identified …