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 144 for “"biodegradability"”.
-
Biodegradability of nitroxylene isomers
Microcosm studies were conducted beginning with three xylene isomers: ortho-xylene, meta-xylene and para-xylene; and continued with the four mononitroxylene (MNX) isomers, culminating with testing ten dinitroxylene (DNX) isomers. Soil samples were obtained from a historically contaminated site with …
-
Biodegradability of dicamba and 2,4-D in riparian wetland soils
A general review of soils in Virginia counties bordering the Chesapeake Bay reveals that coastal plain soils, especially those most agriculturally productive, are dominantly sandy texture in the subsurface horizon, and have shallow water tables. Considering the high amounts of pesticides used in …
-
Toxicity and biodegradability assays for hazardous landfill leachate and textile size effluents
Submitted in fulfillment of the academic requirements for the Degree of Master of Technology: Biotechnology, Durban Institute of Technology, 2005.
-
Model Aquatic Ecosystem Studies of the Environmental Fate and Biodegradability of Industrial Compounds
Made available in DSpace on 2014-12-12T01:27:44Z (GMT). No. of bitstreams: 1 7414576.pdf: 5098759 bytes, checksum: 90095620528c95607d846a398795952b (MD5) Previous issue date: 1974
-
A microcosm study of the biodegradability of adsorbed toluene by acclimated bacteria in soils
Groundwater contamination by man-made chemicals is increasingly being reported in the United States. The potential for detrimental health effects is substantial and has been addressed by the environmental engineering profession. Typically, contaminated groundwater is pumped to the surface and …
-
Fabrication of PLA-hemp 3D printing filaments
… material that mitigates brittleness and enhances biodegradability while maintaining mechanical performance and printability. The methodology involves fabricating composite filaments from 2 mm PLA pellets and 0.4 mm hemp fiber particles. Hemp fiber at varying weight ratios (5 wt%, 10 wt%, and 15 …
-
Design, Development, and Study of New High-Throughput Biodegradation Test for Polymers
… be high-throughput and used for generating the biodegradability information of over 600 polymer chemistries. This large dataset highlights some relationships between polymer chemistry and biodegradability. Secondly, an improved design of a clear-zone monitoring robot leads to higher accuracy of …
-
Doctoral Research Project : Sustainable production of bacterial polymers
… needed for optimal polymer recovery. Finally, biodegradability testing was conducted on P(3HB), P(3HO-co-3HD-co-3HDD), and two control materials, PLLA and PET, under marine aerobic and anaerobic conditions, involving AD and MEC-AD reactors. The results showcased promising marine …
-
Valorization of banana peels to obtain a bioplastic from acetylated starch
… evaluate the quality of the bioplastic obtained, biodegradability tests, tensile tests and Fourier transform infrared spectroscopy (FTIR) were carried out. The results obtained revealed an 80% efficiency in the conversion of banana peels to bioplastic. The percentage of biodegradability reached a …
-
Thermal hydrolysis and thermal alkaline pretreatment of waste activated sludge: comparison of effects on biogas yield, dewaterability, sludge liquor and cost-benefit analysis
… comparable conditions. Higher initial anaerobic biodegradability of WAS leads to lower increase in biogas after pretreatment. Based on WAS initial biodegradability, 22-97% increase in biogas can be expected. Treatment temperatures below 100°C can be as effective as temperatures above 100°C in …
-
Approaches for the Implementation of Sustainability along the Pharmaceutical Life Cycle
… this cycle. In R&D, work focused on improving biodegradability of diclofenac, an NSAID with low topical absorption (5–6%) that harms birds, fish, and other organisms. The alternative ökofenac retained pharmacodynamic/-kinetic properties but showed mixed biodegradability: anaerobic degradation …
-
Effect of surface modifications on biodegradation of nanocellulose and microbial response
… friendly, particularly in terms of their biodegradability and potential impacts to receiving environments. Given the projected mass-scale application of nanocellulose and the inevitability of its subsequent release into environment, the purpose of this study was to determine the …
-
Effects of holding tank odor control chemicals on aerobic wastewater treatment
… settling and compaction, and effluent COD. The biodegradability of dyes and the generation of foam was also measured. Formaldehyde and the formaldehyde-based odor control chemical "Aqua-Kem" damaged the ability of activated sludge to treat wastewater. They resulted in deceased suspended solids …
-
The Effect of Pretreatment Methods on Methane Yield and Nutrient Solubilization During Anaerobic Digestion of Microalgae
… factor in microalgae digestion is the low biodegradability of the cell walls. In the present study, various pretreatment technologies were tested at bench scale for their ability to improve raw, non-lipid-extracted algae biodegradability, which was assessed in terms of methane yield, …
-
Environmental Sustainability ofBIOPLASTICS
… biomass) and to report the information about the biodegradability in the biopolymers end of life contest. As a matter of fact, it must be specified that: - the biodegradability can be a characteristic both for a polymer coming from biomass and for one coming from fossil fuel source; - it does not …
-
Pro-Angiogenic Self-Assembling Peptides
… biomaterials due to their biocompatibility and biodegradability. Self-assembling peptide-based materials include a wide range of peptide motifs that form one-dimensional nanostructures in aqueous solution. Two different PAs are considered in this M.S. thesis work: lipidated peptides, and …
-
Syntheses, structures and properties of novel poly(amino ester)s
pH-Sensitivity, biodegradability and biocompatibility make poly(amino ester)s promising materials for biotechnology. But so far, the chemistry of poly(amino ester)s reported is very limited, especially in amine constitution. Hence novel kinds of poly(amino ester)s are desirable. In our works, …
-
REDOX-RESPONSIVE POLYMER DELIVERY SYSTEMS FOR ANTI-CANCER DRUG AND IMAGING
… redox-responsive poly(amido amine)s showed biodegradability and redox- ¿turn-on¿ imaging characteristic.
-
Assessment of a marine polysaccharide for use as excipient in pharmaceutical hot-melt extrusion
… renewability, biocompatibility and in some cases biodegradability. In this work, the possibility of using Keltone, a marine polysaccharide derived from brown seaweed, as a polymeric excipient for pharmaceutical HME is explored. Keltone is insoluble in acidic pH and soluble in basic pH, therefore …
Page 1 of 8