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Physical Sciences and Mathematics Commons™
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- Acetaldehyde (2)
- Chemical loss (2)
- Chemicals (2)
- Methanol (2)
- Oxygenated hydrocarbons (2)
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- Behavioral responses (1)
- Chemistry (1)
- Dual Media Filters (DMF) process (1)
- Global warming (1)
- Heating (1)
- Hydrogen Sulfide (1)
- Intertidal zone (1)
- Irvine Ranch Water District (1)
- Membrane Bioreactor (MBR) process (1)
- Oxalic acid (1)
- Physiological responses (1)
- Sulfuric acid (1)
- Temperature rates (1)
- Treatments (1)
Articles 1 - 5 of 5
Full-Text Articles in Physical Sciences and Mathematics
Effects Of Ecologically Realistic Heating Profiles On Feeding In The Intertidal Hermit Crab, Pagurus Sameulis, Paige Davis
Effects Of Ecologically Realistic Heating Profiles On Feeding In The Intertidal Hermit Crab, Pagurus Sameulis, Paige Davis
Student Scholar Symposium Abstracts and Posters
The intertidal zone is an ideal habitat to investigate effects of global warming because species living in it are very close to their physiological limits. Initial studies of invertebrate physiological responses to heat stress have employed relatively abrupt increases in temperature. My research investigates effects of ecologically more realistic temperature profiles on feeding in the intertidal hermit crab, Pagurus sameulis. Recent work in the Wright lab showed that feeding in this species is inhibited by an abrupt increase in temperature. Because temperature change in the natural environment of Pagurus is much more gradual, I hypothesize that such a gradual temperature …
Biological Degredation Of Acetaldehyde In Southern California Wetlands, Anthony Castagnola, Brandon Lamb, Mary Senstad, Sovandara Hok
Biological Degredation Of Acetaldehyde In Southern California Wetlands, Anthony Castagnola, Brandon Lamb, Mary Senstad, Sovandara Hok
Student Scholar Symposium Abstracts and Posters
Oxygenated hydrocarbons are ubiquitous in the atmosphere with levels ranging from low ppt (acetaldehyde) to low ppb(methanol). As an OH sink and an atmospheric HOx source, oxygenated hydrocarbons have a direct impact on the oxidative capacity of the atmosphere. A better understanding of the processes that produce and destroy these species in natural water would improve our understanding of the role that these systems play in cycling these species into or out of the atmosphere. These species can be lost to chemical, photochemical, and partical mediated (abiotic and biotic) processes in natural waters. Chemical loss and photochemical loss are believed …
Analysis Of Secondary Wastewater Treatment, Jennifer Magana
Analysis Of Secondary Wastewater Treatment, Jennifer Magana
Student Scholar Symposium Abstracts and Posters
At the Irvine Ranch Water District, two types of secondary treatment are utilized: a sludge and Dual Media Filters (DMF) process and Membrane Bioreactor (MBR) process. This study was proposed to analyze the electrical conductivity (EC) of each secondary effluent and possible reasons for differences. After testing the two effluents using an electrical conductivity probe and ion chromatography, it was discovered that there is no significant difference between the two, though secondary treatment raises the nitrate levels in general.
Biological Degradation Of Acetaldehyde In Southern California Coastal Waters, Mary Senstad, Sovanndara Hok, Ori Barashy, Catherine D. Clark, Warren J. De Bruyn
Biological Degradation Of Acetaldehyde In Southern California Coastal Waters, Mary Senstad, Sovanndara Hok, Ori Barashy, Catherine D. Clark, Warren J. De Bruyn
Student Scholar Symposium Abstracts and Posters
Oxygenated hydrocarbons are ubiquitous in the atmosphere with levels ranging from low ppt (acetaldehyde) to low ppb (methanol). As an OH sink and an atmospheric HOx and ozone source, oxygenated hydrocarbons have a direct impact on the oxidative capacity of the atmosphere. The oceans are one of the largest sources of uncertainty in current atmospheric budget estimates of these species. A better understanding of the processes that produce and destroy these species in seawater would improve our understanding of the role of the oceans in cycling these species into or out of the atmosphere. We have measured the degradation rate …
Removal Of Pb And H2s From Acs Test Procedure For Meta-Phosphoric Acid, Christopher Atlas, Ron Lacock
Removal Of Pb And H2s From Acs Test Procedure For Meta-Phosphoric Acid, Christopher Atlas, Ron Lacock
Student Scholar Symposium Abstracts and Posters
In the pursuit of green chemistry, adequate substitutes for lead acetate and hydrogen sulfide were investigated for use in the ACS test procedure for stabilizer in meta-phosphoric acid. In the current ACS procedure lead acetate is used to form insoluble lead phosphate. In order to remove lead from the solution lanthanum chloride was investigated with positive results. Hydrogen Sulfide is currently used to precipitate lead by forming insoluble lead sulfide. Several substitutes including oxalic acid and sulfuric acid were investigated. Preliminary testing showed that lanthanum chloride and oxalic acid are sufficient in precipitating phosphate and lead out of the sample …