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 20 of 124 for “"Degradation rates"”.
-
Marine particle dynamics : sinking velocities, size distributions, fluxes, and microbial degradation rates
… incubation chambers to assess the respiration rates of microbes attached to sinking particles. I found that at Bermuda, the carbon specific remineralization rate of sinking particulate matter ranged from 0.2 to 1.1 d-1, while along the WAP, these rates were very slow and below the detection …
-
Marine particle dynamics : sinking velocities, size distributions, fluxes, and microbial degradation rates
… incubation chambers to assess the respiration rates of microbes attached to sinking particles. I found that at Bermuda, the carbon specific remineralization rate of sinking particulate matter ranged from 0.2 to 1.1 d', while along the WAP, these rates were very slow and below the detection …
-
The control of starch degradation in Arabidopsis thaliana leaves at night
… how Arabidopsis thaliana plants control starch degradation at night. Starch is the major energy reserve in Arabidopsis. It is broken down at night to maintain growth and metabolism of the plant, when photosynthesis is not possible. The rate of starch degradation follows a linear pattern and is …
-
A Pore Scale Study of Substrate Mixing and Biological Degradation in Porous Media
Finally, degradation rates obtained from a simple continuum model with uniform flow field are compared to results from the full pore scale model. Substrate degradation rates are consistently underpredicted when transverse dispersion coefficients obtained from nonreactive transport simulations are …
-
The effect of alternative electron acceptors on the subsurface biodegradation rates of methanol and tertiary-butyl alcohol
… the potential for increasing the biological degradation of methanol and tertiary-butyl alcohol (TBA), components of a gasoline-alcohol blend, in the subsurface by stimulating the growth of the microorganisms. The primary objective of this study was to evaluate the stimulatory effect of …
-
Biodegradation of organic contaminants in subsurface systems: kinetic and metabolic considerations
… bacteria to man-made organic chemicals or the degradation rates of these compounds. Such information would be useful in planning cleanup or protection strategies for groundwater systems. This study was designed to measure the kinetic response of tertiary butyl alcohol (TBA), determine the …
-
Enhanced degradation of fats, oils and greases in domestic wastewater sewer networks and grease interception systems using peat humic substances
… of peat humic substances in enhancing the degradation of fats, oils and greases (FOG) was investigated under controlled laboratory conditions using bench scale well-mixed bioreactors. An experimental design was used to evaluate the effects of temperature and peat humic substance (PHS) …
-
Oxygen and nitrate enhanced in situ bioremediation of an oil -contaminated salt marsh
… the process of enhancing naturally-occurring biodegradation by supplying limiting nutrients and terminal electron acceptors (TEAS). During this study, two TEAS (O2 and NO3 -) were evaluated for their ability to enhance natural in situ biodegradation of total petroleum hydrocarbons (TPH) in an …
-
Bioremediation of petroleum hydrocarbon contaminated soil
… and Rhodococcus sp. - on the rate of hydrocarbon degradation. Treatment units without nutrients and introduced organisms served as controls. Total petroleum hydrocarbon concentrations (TPH) were monitored using two alternative analytical methods, infrared spectrophotometry and gas chromatography. …
-
Estrogen Receptor and Progesterone Receptor Synthesis and Degradation in Breast Cancer Cells (Turnover, Precursor, Density Shift, Dense Amino Acids)
This study was aimed at determining synthesis and degradation rates of the estrogen and progesterone receptors in a human breast cancer cell line and investigating the effect of ligand (both agonist and antagonist) binding on these rates.
-
Invitro protein synthesis and degradation and cathepsin D activity in the muscles of selenium-vitamin E deficient sheep
Invitro synthesis and degradation capabilities and the cathepsin D activity of the skeletal muscles of experimentally induced Selenium-Vitamin E deficient lambs were investigated. Twenty-one Dorset x Coopworth x Suffolk lambs were blocked by weight and assigned to one of the following treatments: …
-
Mechanistic understanding of biogenic Mn-oxide mediated bisphenol A degradation
… putida GB-1 to determine if they can mediate BPA degradation by producing MnO[subscript 2-bio]. Then, we examined the relative contribution of Mn(III) in BPA degradation by MnO[subscript 2-bio], using R. AzwK-3b as a model organism. In the first study, we demonstrated that R. AzwK-3b and E. SD-21 …
-
Protein Utilization and Requirements in Broiler Breeders
… of proteolysis-related genes. Fractional degradation rates were found to increase during early lay and at 45 wk, but not at peak production. Expression of Fbox 32 protein, an indicator of ubiquination, was found to be elevated at the same periods degradation rates were found to be …
-
Enhanced Biodegradation in Landfills
… and bioreactor landfills at enhancing biodegradation, and to optimize the operation of a bioreactor. Waste Management has been examining leachate recirculation landfills for several years. Samples of Municipal Solid Waste (MSW) from existing leachate recirculation (LR) landfills were …
-
Push-pull Tests to Quantify In-situ Naphthalene Phytoremediation Rates
… wells were installed to determine in-situ degradation rates at a creosote contaminated site and to assess the contribution of hybrid poplar trees to polynuclear aromatic hydrocarbon (PAH) remediation. Well positioning enabled comparison between contaminated and non-contaminated locations, …
-
The Effect of Cyclodextrin on Reductive Dechlorination
… chlorinated ethenes. After chlorinated solvent degradation rates were established in anaerobic and aerobic microcosms, 100 mg/L of CD solution was added for a period of 21 days. CD was then removed after 26 days to simulate the degradation response of the aquifer in a post CD injection …
-
Degradation of polylactic acid in the presence of microsize and nanosize fillers
… and their composites are subjected to isothermal degradation in air at 180 C and 200 C. Degradation rate constants are calculated from novel equations incorporating IV. Results show that the thermal degradation rate constants of the amorphous PLA and its composites are lower than those of the …
-
Environmental Remediation with Fenton Reagents and Synthesis of a Novel Halide Fluorescence Sensor
… (II) closer to target species could increase the degradation rates. This was observed with application of carboxymethyl-ß-cyclodextrin (CMßCD). Effects from concentration, structure of the target species and acidity etc., were studied. The increased degradation rates were observed even in the …
-
Synthesis and application of biomaterials containing the 1,3,5-triazaadamantane moiety or functionalized alginate
… benzaldehydes, these compounds possess tunable degradation rates that depend on the substituents on the aromatic aldehydes. TAAs possess a branched architecture that was utilized in a variety of projects. TAA monomers were synthesized that were used for the preparation of degradable dendrimers. …
Page 1 of 7