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.
Results
Showing 1 to 14 of 14 for “"freezing point depression"”.
-
Kinetics and Mechanism of Syn, Alpha' Lithiation of Tertiary Benzamides
… obtained by nuclear magnetic reso- nance, freezing point depression and stopped-flow infrared spectros- copy indicates the reaction proceeds with rapid initial formation of tetrameric complexes followed by rate determining deprotonation. Model studies using …
-
The Reaction of Ethylenediamine with Cobalt (II) Perchlorate and Oxygen in Dilute Aqueous Solutions
… conductometric, magnetic susceptibility, freezing point depression, electron spin resonance and cobalt (II) extraction methods. The fact that the complex was brown in color, diamagnetic, contained ethylenediamine to cobalt to oxygen in a mole ratio of 4:2:1 was confirmed. The complex …
-
The economics of sugar hydrogenloysis for the commercial production of an automotive antifreeze
… antifreeze was tested. AB far as viscosity and freezing point depression were concerned, such an automotive antifreeze compares favorably with ethylene glycol. The economics of the process were studied, and a tentative plant was designed to produce 3000 tons per year which would require a …
-
Multiscale modeling of transport mechanisms and quality changes in frozen foods during freeze-thaw cycles
The freezing process is commonly used to store and preserve foods. However, the frozen foods’ texture and taste are harmed by the temperature fluctuations during shipping and storage. The insights into the mechanisms of heat transfer, moisture migration, ice crystallization and solute diffusion are …
-
Kinetics and Mechanism of the Catalysis of the Decomposition of Hydrogen Peroxide by Schiff Base Complexes of Copper(II).
… complexes, in aqueous ethanol solvent. Freezing point depression and vapor pressure lowering studies were carried out to confirm the dimeric nature of the [CuSALAD]<sub>2</sub>.H<sub>2</sub>O complex that had been previously reported. The stoichiometry of the …
-
Behavioral freeze avoidance in an Antarctic fish
… Southern Ocean. Most notothenioids avoid freezing primarily by the action of their blood-borne antifreeze glycoproteins (AFGPs). AFGPs arrest the growth of environmental ice crystals that enter the fish, thereby preserving the body fluids in liquid state. AFGPs are ubiquitous in all adult …
-
Stress-tolerant bioremediation strategy for cold-climate sites: laboratory, modelling, and field studies for extending petroleum hydrocarbon biodegradation to seasonally freezing and frozen contaminated soil phases
… explored. How biodegradation can be enhanced in freezing and frozen soils is unknown. Through laboratory, modelling, and field studies, this research investigated the enhancement of hydrocarbon biodegradation during phase changes in cold soils subjected to seasonal freeze-thaw conditions. In a …
-
PVTX and Raman Spectral Properties of Fluids at Elevated Pressures and Temperatures
… properties such as salinity (based on the freezing point depression of liquid), or density based on the temperature at which all phases within the fluid inclusion homogenize to a single phase. Raman spectroscopy is a non-destructive analytical technique that measures the vibrational …
-
Lactose Hydrolysis by Fungal and Yeast Lactase: Influence on Freezing Point and Dipping Characteristics of Ice Cream
… to examine the effects of lactose hydrolysis on freezing point and dipping characteristics of ice cream. The overall research objective was to determine changes in freezing point, texture and ease of dipping ice cream as a result of lactose hydrolysis. It was also the goal of this research to …
-
Characterization of water distribution in sludges
… bound and unbound. For the TGA, the demarcation point between these two fractions was indicated by the onset of the first critical/inflection point on the drying rate curve. The DSC and dilatometric methods determined the amount of bound water by first measuring the amount of unbound water that …
-
Mortality of native forest vegetation in the Kaimai ranges
… the bulk modulus of elasticity and turgor loss point. Osmotic potential was determined independently from freezing point depression measurement on leaf exudates and similar values were found. The bulk modulus of elasticity and the coefficient of elasticity are closely linked and variations in …
-
Geochemical studies of earth materials
… was selected because it is highly soluble, its freezing-point depression is well known (allowing us to confirm the inclusion composition through freezing studies) and the energetic Sr X-rays are only mildly attenuated by quartz. SXRF analyses were performed on beam line X26A of the National …
-
Effect of environmental temperature on Antarctic fish antifreeze protein activity and concentration
… the western Antarctic Peninsula (WAP) experience freezing sea surface water temperatures and ice formation only during the austral winter but the water below 100 m is warmer due to the effects of the Circumpolar Deep Water (CDW) that flows onto the shelf. During the winter the temperature gradient …