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 43 for “"hexadecane"”.
-
The hydrocracking of long chain n-paraffins under Fischer-Tropsch conditions
… Practically this means the hydrocracking of n-hexadecane was studied at the space velocity, the reaction temperature and pressure and under partial pressure of H2, CO and water, at which n-hexadecane is produced in F-T process assuming that n-hexadecane is the only hydrocarbon product and that …
-
The Effects of Diesel Fuel on the Growth of Selected Freshwater Phytoplankton
… in growth. The three hydrocarbons heptadecane, hexadecane and nonadecane had varying effects on the algae. Heptadecane inhibited Chlamydomonas , but stimulated Scenedesmus. It had no effect on the other two algae. Nonadecane only affected Chlamydomonas, which was inhibited. Hexadecane slowed the …
-
Tribopolymerization: ceramic lubrication under high loads and high speeds
… ether, were used at 1 wt. % concentrations in hexadecane with alumina on alumina pin-on-disk testing. A two by two matrix of load and speed conditions was used to determine the effects of load and speed on wear reduction. At low speeds, the monomers showed significant wear reductions, from 37 …
-
Self-Replenishing, Wear-Resistant and Anti-Sticking Surfaces Based on Liquid Impregnation of Microstructured Mesoporous α-AI₂O₃ [Alpha Alumina] Matrices
… different impregnating liquids such as water, Hexadecane, Dodecane, Fomblin® oil and 3M HFE 7200 were employed in conjunction with various alumina matrix densities ranging from 70 to 99.5 %. Fomblin® oil was found to be the most efficient impregnating liquid. Indeed, anti-sticking and pinning …
-
The Origin of Polycyclic Aromatic Hydrocarbons in Diesel Exhaust Emissions
… pyrene and benzo[α]pyrene (B[α]P), and 14C-n-hexadecane. These were spiked into the diesel fuel and were combusted in the Prima Engine. The extent of survival was 0.04% for B[α]P, 0.17% for pyrene and 0.87% for fluorene. The amount of each PAH in the exhaust emissions derived from …
-
Isolation of bacterial strains capable of efficient conversion of n-alkanes into value added products
… in pure alkanes, n-dodecane, n-tetradecane, and hexadecane for comparison. In addition, the strain, P. aeruginosa MB2SA, was grown in an appropriate medium for PHA synthesis and high yields of PHA were observed when both the long alkane fraction, Cw CI7, and pure alkane, hexadecane, were employed …
-
A study of tribopolymerization under fretting conditions
… processes, were used at 1 % concentration in hexadecane. Under the conditions used (90N load, 65Hz frequency, 200μm peak-to-peak amplitude, 1 hour), the monomers tested reduced friction or wear or both. Fourier Transform Infrared Microscopy (FTIRM) analysis of the test specimens shows that …
-
Environmental Applications of Ultrasound
… carbonyl were decomposed sonochemically in hexadecane to form porous aggregates of 2--3 nm high surface area Mo2C and W2C particles. The activity of these materials was studied for the catalytic hydrodehalogenation of aliphatic and aromatic halocarbons at low temperatures (T = …
-
A Study of Rhamnolipid Microbubble Dispersion for Bioremediation Applications
… interaction of P.putida and R.erythropolis and hexadecane, a model NAPLcontaminant on the microbubble surface. The LW-AB surface thermodynamic model was applied to quantify the interaction energy to better understand the bacteria/microbubble and bacteria/contaminant/microbubble interactions. The …
-
Bioremediation of modelled petroleum-contaminated soils of the Niger Delta and the impact of zeolite augmentation
… that they were able to utilize hydrocarbons (hexadecane and sodium benzoate) as the sole source of carbon and energy and were able to show significant growth in crude oil at an optimum temperature of 30oC. For maximal bacterial growth and degradation effective aeration and agitation was …
-
New Liquid Crystalline [2]Rotaxanes
… exhibited a unidentified mesophase, the hexadecane straight chain [2]rotaxane showed SmA mesomorphism, the branched hexadecane and the hyperbranched [2]rotaxanes both showed lamellar soft crystal phases. Chapter 4 describes the effect of applying groups typical for low molecular weight …
-
Synthesis, physico-chemical properties and potential applications of colloidal gel particles
… two emulsions (tricaprylin-in-water and hexadecane-in-water). The stability of the emulsions increased with increasing the concentration of the microgel. For the tricaprylin-in-water emulsion, a concentration of 0.3% w/v of the novel microgel particles managed to stabilize the emulsion …
-
Liquid-phase adsorption of n-paraffins on type 5A molecular sieves
… 5A sieves for n-eicosane was lower than for n-hexadecane and n-dodecane corresponding to a lower equilibrium loading capacity and lower overall mass transfer coefficient. The values of individual external, internal, theoretical and experimental overall mass transfer coefficient were determined. …
-
Surface Characteristics of Bacillus Spores
… purified and characterized for hydrophobicity by hexadecane partitioning, surface morphology by scanning electron microscopy, and steady-state fluorescence by spectroscopy. The morphology of spores was similar within taxonomic groups and dissimilar between groups. Spore hydrophobicity ranged from …
-
Auto-Ignition of Liquid n-Paraffin Fuels Mixtures as Single Droplets Using Continuous Thermodynamics
… compositions: one ranging from ¬n-octane to n-hexadecane, the second ranging from n-dodecane to n-eicosane, and the third being a combination of the first two mixtures to produce a “dumbbell” mixture. Discrete and continuous mixture models of the ASTM standard distillation test were compared to …
-
The use of model compounds to investigate the influence of fuel composition on the thermo-oxidative stability of fame/diesel blends
… in petroleum diesel. The model compounds were n-hexadecane, tetralin and decalin. Fuel analysis was performed using gas chromatography (GC) with mass spectrometric (MS) and flame ionisation (FID) detection. Further analytical methods included Fourier transform infrared (FTIR) and …
-
Self-assembly of conformal polymer electrolyte film for lithium ion microbatteries
… the contact angles of PEO on LCO in hexane and hexadecane, chosen for their immiscibility in PEO. For better comparison, these experiments were repeated using water instead of PEO, for a total of four systems tested. This data allowed an estimate for the experimental surface energy components of …
-
Enzymology of dicarboxylic acid metabolism in Corynebacterium sp. strain 7E1C
… dicarboxylic acid was produced during growth on hexadecane, methyl palmitate or 16-hydroxypalmitate.3.Corynebacterium 7E1C possesses constitutive NAD+-dependent and NADP+-dependent alcohol dehydrogenases active with mono-ol, a, w-diol and (L)-hydroxyfatty acids. Additional NADP+-dependent octanol …
-
Acanthamoebal surface properties and the modulation of phagocytosis
… Hydrophobicity was determined by adhesion to n-hexadecane and indicated a relatively low hydrophobic nature of both forms, though less so for cysts. Surface carbohydrate composition was studied by the use of fluorescent lectins and flow cytometry, using a ligand-receptor approach for further in …
-
Limiting Activity Coefficients for Aqueous Solutions
… measurements such as inverse solubility and hexadecane-water and octanol-water partition coefficients were also evaluated as methods for obtaining $\gamma\sp\infty$ of solutes in water. A database of inverse solubility of solutes in water was compiled. Differential ebulliometry was used to …
Page 1 of 3