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 1223 for “"Hydrocarbons"”.
-
Polynuclear Hydrocarbons From Acetophenone
Made available in DSpace on 2014-12-05T19:38:16Z (GMT). No. of bitstreams: 1 6305123.pdf: 6893448 bytes, checksum: a9c64f274a4c05320d9433ad4529445e (MD5) Previous issue date: 1963
-
Shape Selective Oxidations of Hydrocarbons
Tetrakis-5,10,15,20-(2',4',6'-triphenylphenyl)porphyrinate (TTPPP) manganese(III) and iron(III) acetate were both found to be shape selective alkane hydroxylation catalysts when iodosobenzene was used as oxidant. The selectivity observed was the same when these catalysts were used with …
-
Evaluating rhizodegradation of petroleum hydrocarbons and polycyclic aromatic hydrocarbons in wetland sediments containing spartina patens
Biodegradation of petroleum hydrocarbons (PHC) and 16 polycyclic aromatic hydrocarbon (PAH) compounds was evaluated in sediments from a stormwater basin that was a former salt marsh at an active oil refinery. Spartina patens were grown in basin sediments during a field study and a greenhouse study …
-
The Vibrational Spectra of Chlorosubstituted Hydrocarbons
… spectra of saturated and unsaturated chlorinated hydrocarbons have been studied using low temperature techniques, including isolation in an inert matrix. The compounds were selected in relation to problems in the understanding of the properties of poly (vinyl chloride).<br/><br/>The physical …
-
Gas-phase Ion Chemistry of Hydroxy and Amino-substituted Interstellar Polycyclic Aromatic Hydrocarbons and Protonated Polycyclic Aromatic Hydrocarbons
… and amino-substituted polycyclic aromatic hydrocarbons (PAHs) and their protonated counterparts were studied using mass spectrometry. Ions were generated using an electron ionization (EI) source and the unimolecular chemistry of metastable ions was studied by performing mass-analysed ion …
-
Characterisation of unresolved complex mixtures of hydrocarbons
The hydrocarbons of Recent Polluted.., sediments, in-reservoir and laboratory biodegraded crude oils, and certain petroleum products (e. g. lubricating oils) often display "humps" or Unresolved Complex Hixtures (UCHs) when analysed by gas chromatography (CC). Although widespread and often abundant, …
-
Biodegradation of Volatile Hydrocarbons in Estuarine Environments
Benzene, toluene, isoprene, ethane and propane are volatile organic compounds (VOCs) commonly found in estuarine environments. Benzene and toluene are toxic and carcinogenic at varying concentrations. Isoprene, ethane and propane are emitted from marine environments to the atmosphere where they can …
-
Saturated hydrocarbons in marine plants and sediments.
Massachusetts Institute of Technology. Dept. of Geology and Geophysics. Thesis. 1966. M.S.
-
The diffusion mechanism of hydrocarbons in zeolites
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1990.
-
Catalytic Cracking Of Hydrocarbons With Novel Metal Traps
Nickel and vanadium poison FCC catalysts with destruction of zeolites. This is reflected by a lower gas oil conversion and lower gasoline selectivity. Ni and V also affect hydrogen transfer resulting in more coke formation and reducing light gases.;New catalysts, so-called FCCT (catalysts for FCC …
-
Partial Oxidation of Hydrocarbons Over Ceria Zirconia Catalysts
This thesis describes research along several avenues pertaining to oxidation reactions. First, the major conclusions are summarized from a perspective describing active oxygen species on catalyst surfaces. Some oxygen species are more selective than others and if these species were better …
-
Bioremediation of petroleum hydrocarbons using microbial fuel cells
Environmental pollution by petroleum hydrocarbons has serious environmental consequences on critical natural resources upon which all living things (including mankind) largely depend. Microbial fuel cells (MFCs) could be employed in the treatment of these environmental pollutants with concomitant …
-
Strategies for enhancing bioelectrochemical remediation of petroleum hydrocarbons
Globally, Petroleum Hydrocarbons (PH) contamination in the environment is widespread due to accidental spillages, leakages and indiscriminate disposal. PH pollutants are continuously a concern because of their high toxicity to humans and the environment. While there have been efforts to remediate …
-
Monoaromatic hydrocarbons and aldehydes in Las Vegas air
The observed concentrations of the monoaromatic hydrocarbons and aldehydes show significant correlations within the various monoaromatic hydrocarbons, and within the various aldehydes as well as between the two groups of compounds. Moderate or good correlations between observed concentrations of …
-
Modeling secondary organic aerosol formation from biogenic hydrocarbons
<p>Secondary organic aerosol (SOA) is formed generally by the oxidation of gas-phase volatile organic compounds (VOCs) to form semi- or non-volatile products that then undergo gas to particle partitioning. In this work, the Caltech Atmospheric Chemistry Mechanism (CACM) and the Model to Predict the …
-
Dermal exposure to polycyclic aromatic hydrocarbons among workers
Contains fulltext : mmubn000001_180842978.pdf (Publisher’s version ) (Open Access)
-
Lichens as biomonitors for atmospheric polycyclic aromatic hydrocarbons
… studies investigating the polycyclic aromatic hydrocarbons (PAHs) levels in lichens (species Parmotrema austrosinense (Zalhbr.) Hale) was performed successfully using various sample preparation techniques. Sampling campaigns were conducted at 5 different sites across South Africa. Different …
Page 1 of 62