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 51 for “"ice formation"”.
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Large scale response of the ocean to sea ice formation,
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Meteorology, 1969.
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A microscopic investigation of intracellular ice formation in frozen human erythrocytes.
Massachusetts Institute of Technology. Dept. of Mechanical Engineering. Thesis. 1972. Sc.D.
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On the Physics of Ice Nucleation and Growth in Nanoscale
Fundamental understanding of ice formation on a surface, i.e. heterogeneous formation, is critical to suppress ice accretion on the surfaces. Ice formation on a surface includes two steps of ice nucleation and further ice growth. As water droplet is placed on a sub-zero surface, with a time delay, …
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A Fluorescence Correlation Spectroscopy Study of the Cryoprotective Mechanism of Glucose on Hemocyanin
… of cooling, cryoprotectants are used to inhibit ice formation. Common cryoprotectants used today include ethylene glycol, propylene glycol, dimethyl sulfoxide, glycerol, and sugars. However, the mechanism responsible for the effectiveness of these cryoprotectants is poorly understood on the …
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On Physics of Durable Ice Phobic Surfaces
Icephobic surfaces have a critical footprint on human daily lives ranging from aviation systems and infrastructures to energy systems, but creation of these surfaces for low-temperature applications remains elusive. Non-wetting, liquid-infused and hydrated surfaces have inspired routes for …
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Structure-Property Relations of Calcium-Sulfur-Hydrogen: An Investigation of the Electromechanical Properties
… decreasing temperature due to the influence of ice formation. This decrease was interpreted in terms of a decrease in the electroosmotic volumetric flux and hydraulic permeability with decreasing temperature. The strong non-linearity in the induced strains was found with respect to the electric …
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Tomographic observations of deep convection and the thermal evolution of the Greenland Sea Gyre, 1988-1989
… salinity is increased by brine rejection from ice formation and by entrainment but in which the mixed-layer deepens only slowly to a depth of some 150-200m, a deep mixing phase (February-March) during which the surface mixed-layer deepens rapidly to approximately 1500m in the gyre center purely …
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Genomic, transcriptomic, and metagenomic approaches for detecting fungal plant pathogens and investigating the molecular basis of fungal ice nucleation activity
… roles in the atmosphere because of their ice nucleation activity (INA). INA is the capacity of some particles to induce ice formation above the temperature that pure water freezes (-38°C). Importantly, INPs affect the ratio of ice crystals to liquid droplets in clouds, which in turn …
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Snowfall Characterization by Field Observation and Atmospheric Sounding
… weather systems and is further specified by choice of measurement time, related to the statistics of individual falling ice crystals. A snowflake is definable as a single ice crystal having long range order in the crystal lattice or as a polycrystalline having a multitude of individual single …
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Pulse de-icing for aircraft applications
Ice formation and accumulation on aircraft is a major problem in aviation. Icing is directly responsible for fatal aircraft incidents, limiting the safety of air travel and requiring expensive, inefficient, and sometimes ineffective de-icing strategies. In this work, we develop and study …
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Through Vial Impedance Spectroscopy (TVIS): A novel process analytical technology for investigating the thawing of frozen cell suspensions.
… die when they freeze because of intracellular ice formation causing cell disruption from within (Inc. gene and protein expression, etc.) and extracellular ice formation causing concentration of solutes, and osmotic shrinkage, with the potential to damage cell membranes (which then don’t recover …
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Over-Winter Mortality Of Gizzard Shad (Dorosoma Cepedianum) In Oneida Lake, New York
… rates as water temperatures declined prior to ice formation and are highest at temperatures less than 4 degrees C. Habitat sampling demonstrated that shad congregate in high densities in Oneida Lake marinas, which provide a nearshore temperature refuge but may become anoxic during years with …
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Investigating the ice nucleation activity of organic aerosol
… by altering cloud properties. Aerosol-induced ice nucleation includes several processes that impact cloud formation, lifetime, albedo, and precipitation efficiency. Ice nucleating particles (INPs) promote ice formation at warmer temperatures and lower relative humidities than required to …
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Development of ice-bonded ballast in sub-freezing temperatures and its effect on maintenance operations during a winter rail break
Sub-freezing temperatures result in ice formation within the ballast layer of railroad track. Given the proper moisture and fouling conditions, the retained moisture bonds ballast particles together changing the mechanical properties. For above-freezing temperatures, longitudinal track resistance …
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Cold-acclimation of the wood cockroach <i>Cryptocercus punctulatus</i> (Scudder) (Dictyoptera: Cryptocercidae)
… as well as others, heat-labile hemolymph ice nucleating factors induce extracellular ice formation at a high subzero temperature (around -6°C), there is a seasonal accumulation of a cryoprotective substance (polyol) and internal ice is tolerated only during the winter. In addition, body …
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Improving road ice prediction through the introduction of GIS gererated geographical parameters to an ice forecasting model
… parameters for input into the Geographical Road Ice Prediction model and the dissemination of the resulting ice forecast through<br/>a web based GIS system. The methods developed are then discussed in relation to a trial conducted in Hampshire in the winter of 2006/7, which test the methods in a …
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Radium isotopes and radon-222 as tracers of sediment-water interaction in Arctic coastal and lacustrine environments
… they are hotspots for biogeochemical transformations such as redox reactions, nutrient consumption and regeneration, organic matter leaching and degradation, and mineral weathering. Radium isotopes (223Ra, 224Ra, 226Ra, 228Ra) and radon-222, naturally occurring radioactive isotopes produced …
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Characterization of air-sea gas exchange processes and dissolved gas/ice interactions using noble gases
… concentrations can be significantly modified by ice formation and melting, and due to the solubility of He and Ne in ice, the noble gases are shown to be unique tracers of these interactions. A three-phase equilibrium partitioning model was constructed to quantify these interactions in …
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Unnatural glycopeptides with application on cancer research
… recognize their targets are scarce. This information is essential, for example, to develop new MUC1 glycopeptides with improved binding strength and specificity for anti-MUC1 antibodies that can be used in early cancer detection assays. On this basis, an exhaustive study of the molecular …
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Optimization of conditions for vitrification of aqueous solutions of relevance to cryobiology
… at a fast rate. If cooling is sufficiently fast, ice-formation is inhibited. This creates a glass-like vitrified state. To optimize the probability of vitrification, current approaches were modified. Different cooling methods were investigated. Containers called cryostraws were crafted from six …
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