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 30 for “"Remineralisation"”.
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Dispersal and remineralisation of biodeposits: Ecosystem impacts of mussel aquaculture
… might otherwise not be deposited. The benthic remineralisation of biodeposits increases sediment oxygen demand and nutrient regeneration, thus enhancing the benthic-pelagic coupling of nearshore ecosystems. In New Zealand the mussel Perna canaliculus has a high natural abundance and is also …
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Ionic exchanges between glass ionomers and demineralised dentine
… and in vitro. 2. To determine the nature of the remineralisation process. 3. To determine those factors having greatest impact on the remineralisation process. Those objectives are partly met with the use of EPMA and an in vitro model, specially designed to simulate clinical conditions as closely …
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Three dimensional surface texture analysis for characterisation of enamel erosion
… to a citric acid erosion and pooled human saliva remineralisation model. For the polished samples, enamel surface microhardness was measured using a Knoop hardness tester, step height enamel loss was measured using a white-light confocal profilometer and surface texture was measured using confocal …
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Optical characterisation of the interaction between calcium-silicate based dental restorative materials and dentine
… to investigate its capability to induce dentine remineralisation. Different optical, microscopic, and fluorescent labelling techniques have been applied; such as tandem scanning and laser scanning confocal microscopy, which were both used with cement labelling and micropermeability tests to …
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Ein In-situ-Versuch über die De- und Remineralisierungswirkung von Zahnpasten von 0 bis 1500ppm Fluoridgehalt
… Ziel der Ermittelung einer optimalen Dosis zur Remineralisation von Läsionen und zum Schutz vor Karies.
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Der Einfluß lokaler Fluoridierungsmaßnahmen auf die Fluoridaufnahme, Retention und die Mineralisation kariöser Initialläsionen in vitro
… Fluoridkonzentrationen bewirken keine höhere Remineralisation als häufig angewendete niedrige Fluoridkonzentrationen.
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Amorphous calcium phosphate nanocomplexes in dental film formulations
… to prevent dental caries through enamel remineralisation, supplementing the calcium and phosphate concentrations by delivery from an adhesive dental film dosage form. A formulation containing calcium chloride, dibasic sodium phosphate and stabiliser in hydrochloric acid solution at a pH …
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The Oceanography and Modelling of the Pontevedra Ria (NW Spain)
… signal, with a clear zone of near-bed aerobic remineralisation in the internal ria. Nutrient flux experiments showed that high nutrient fluxes, particularly ammonium (3.5 mg N mˉ² hˉ¹), coincided with period of high water influx to the ria. These were related to stirring of quasi-benthic …
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The seasonal cycling and physico-chemical speciation of iron on the Celtic and Hebridean shelf seas
… system, suggesting a balance of scavenging and remineralisation processes. Coincident drawdown of dFe and nitrate (NO3-) was observed during the phytoplankton spring bloom. During the bloom, preferential drawdown of soluble Fe (< 0.02 µm; sFe) over colloidal Fe (0.02-0.2 µm; cFe) indicated …
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Effektivität von Fluoridierungsmassnahmen nach Kariesentfernung mit Carisolv™ im Wurzeldentin
… wurde die Hälfte der Proben fluoridiert. Nach Remineralisation im künstlichen Speichel wurden die Proben demineralisiert. An histologischen Schnitten wurde die Knoophärte entlang des Kavitätenbodens und als Kontrolle im gesunden Dentin gemessen. Im Polarisationsmikroskop wurde die Tiefe der …
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Trace element signatures of Peruvian and Chilean upwelling sediments
… surface water productivity, early diagenetic OM remineralisation, sulfate reduction and pyrite formation. The context between the specific trace element availability in sea water, the accumulation of specific trace elements in biodetritus and the recording of these signals in Peruvian sediments …
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Dental biofilm formation in young children and the long term effects of fluoride varnish
… is known about the processes involved in enamel remineralisation the effects of fluoride on indigenous biofilms in vivo are unclear. Aims: The aim of this study was to combine data specifying the distribution of oral bacteria derived from clinical samples with in vitro observations in order to …
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An investigation of the hydrothermal stability and mineralisation of collagen and their relationship
… the hydrothermal stability was investigated. Remineralisation experiments using demineralised turkey leg tendon and chemically modified bovine hide collagen showed that although it was possible to grow hydroxyapatite mineral crystallites on the collagen substrate they were only present at the …
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Remineralisierendes Potential neuartiger zahnärztlicher Lacke
… Ziel der vorliegenden In-vitro-Studie war es das Remineralisationspotential diverser neuartiger, zahnärztlicher Fluoridlacke auf initialen Schmelzläsionen zu untersuchen. Hierfür wurden aus gesunden, bovinen Zähnen Probenblöcke (n= 276) hergestellt und zufällig in zwölf Versuchsgruppen eingeteilt. …
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Benthic oxygen exchange across soft and hard bottoms using the new Eddy Correlation technique: Case studies from the tropics to the Arctic
… allowed accurate quantification of the benthic remineralisation rates and carbon turnover efficiency in the coastal and maerl environments, but less so for the more complex under sea ice and cold Arctic environments. Rates presented agree well with other published studies documenting the use of …
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Turkey-leg-tendon : a model system for collagen mineralisation
… and the loss of collagen content in remineralisation. The absence of higher signalling components (such as tenocytes in the collagen matrix and proteoglycans present in the ECM) results in a perturbed mineralisation system. Non-mineralised regions of the tendon greatly influenced the …
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Not all models are created equal: assessing parameterisations of iron dynamics in ocean biogeochemical models
… the major processes of uptake by phytoplankton, remineralisation and scavenging. However, there is no generally accepted set of equations to represent iron dynamics and thus a variety of different parameterisations are employed across the modelling community. The thesis work focussed on the …
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The marine biogeochemistry of dissolved organic carbon and dissolved organic nutrients in the Atlantic Ocean
… upper<br/>and deep waters suggested preferential remineralisation of P relative to C and N, and N<br/>relative to C. A greater remineralisation length scale for DOC relative to DON and<br/>DOP produced a long-term, steady flux of C from the surface to the deep ocean.<br/>Therefore, CO2 fixed in …
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Bestimmung der apparenten Knochendichte am Kaninchenkiefermodell mittels der Peripheren Quantitativen Computertomographie
… des Implantats zu erreichen ist. Die Remineralisation nach einer zusätzlichen Trepanationsbohrung erfolgt von distal nach proximal, bei einer einfachen Zahnextraktion beginnt sie medial, d.h. im Zentrum der Extraktionsalveole. Bewertung, Ausblick Durch diese Methode kann das …
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The Degradation of Resin Materials Bonded to Dentine in the Root Canal by the Activation of Matrix Metalloproteinases
… interface leakage through biomimetic remineralisation of the dentine.<br/><br/>In this study the commercially available self-adhesive self-cure resin cement RelyX<sup>TM</sup> Unicem Aplicap<sup>TM</sup> was modified by incorporating chlorhexidine and Bioglass 45S5 into<br/>the cement …
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