Search results

Title: Formation of aluminium nitride
Creator: Rudd, E. B., Veit, L. L.
Date: 2009, 1921
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/formationofalumi00rudd
Thesis (B.S.)--Armour Institute of Technology

Title: Ease of Contamination and Subsequent Sanitation of Food Contact Surfaces Using Salmonella Contaminated Nut Butters
Creator: Kamineni, Prashanthi
Date: 2012-07-23, 2012-07
Description: Salmonella species can survive and or persist for long periods of time in low moisture foods and on food contact surfaces. Understanding...
Show moreSalmonella species can survive and or persist for long periods of time in low moisture foods and on food contact surfaces. Understanding parameters of transfer and survival can provide information required for successful control of this foodborne microorganism. This study investigated the recovery of Salmonella from food contact surfaces (stainless steel, Delrin, polyethylene, polyurethane) as well as their transfer from nut butters onto the contact surfaces. S. Tennessee and S. Oranienburg were grown overnight to stationary phase, harvested and inoculated separately into peanut butter and almond butter. One gram of inoculated nut butter was applied to each of the three separate 4 X 4 cm areas on the materials and stored at room temperature. The nut butters were removed after 1, 7, and 14 day intervals to leave a visually clean surface. Surfaces were swabbed and/or tested with contact plates to determine the population of any remaining cells. Using contaminated peanut butter, highest numbers of S. Tennessee of about 4.27 ± 0.30 per cm2 were recovered from stainless steel surface after 1 day of contact time. Both serovars were recovered at low numbers over time. However, when contaminated almond butter was used, lower recovery was obtained with both serovars. Visually clean surfaces were also treated with various sanitizers to determine efficiency of treatments. Of the three sanitizers, isopropanol proved most effective overall in reducing Salmonella contamination whereas chlorine was least effective. BDD and isopropanol gave best efficiency on stainless steel with a reduction of about 2.5 logs and least on polyurethane surface with a reduction of only about 1 log (p<0.05). Results were similar for both the serovars tested. In general, sanitizers were most effective on stainless steel while polyurethane surface was the most difficult to sanitize. These studies contribute to a better understanding of the behavior of S. Tennessee and S. Oranienburg in nut butters and on food contact surfaces. Estimation of contamination levels may be determined from transfer rates for Salmonella from contaminated to uncontaminated foods and food contact surfaces.
M.S. in Food Safety and Technology, July 2012
Show less

Title: The manufacture of salicylic acid
Creator: Kendall, S. W.
Date: 2009, 1917
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/manufactureofsal00kend
Thesis (B.S.)--Armour Institute of Technology

Title: Manufacture of soaps and the recovery of glycerine
Creator: Polhman, E.f., Martin, H.w.
Date: 2009, 1910
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/manufactureofsoa00polh
Thesis (B.S.)--Armour Institute of Technology

Title: MODELING AND SIMULATION OF DIRECT CARBON FUEL CELL ANODE IN CONNECTION WITH ANALYSIS AND CHARACTERIZATION OF WETTED CARBON ROD IN MOLTEN CARBONATE
Creator: Peng, Feng
Date: 2013, 2013-07
Description: Not available
M.S. in Chemical Engineering, July 2013

Title: Glycerol and spent lye clarification
Creator: Parrot, Raymond D.
Date: 2009, 1915
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/glycerolspentlye00parr
Thesis (B.S.)--Armour Institute of Technology; Bibliography: leaf 39

Title: INVESTIGATION OF OXYGEN GENERATION DURING THE OPERATION OF LITHIUM-ION CELLS USING IN-SITU FLUORESCENCE SPECTROSCOPY
Creator: Li, Mo
Date: 2016, 2016-07
Description: An ex-situ fluorescence spectroscopy system was set up and utilized to study the interaction of fluorescent dyes with an oxygen quencher. The...
Show moreAn ex-situ fluorescence spectroscopy system was set up and utilized to study the interaction of fluorescent dyes with an oxygen quencher. The Stern-Volmer relationship was obtained and fitted to correlate the partial pressure of oxygen to the dye fluorescence intensity. The oxygen quenching constant α for 30 μM 9,10-dimethylanthracene_(DMA) dissolved in the mixture of ethylene carbonate_(EC) and dimethyl carbonate_(DMC) (1:1 volume ratio) were 0.69/0.62 at high/low partial pressure of oxygen. Operation of the self-made pouch cells with LiCoO2 as the cathode material was examined by charging/discharging at C/10. The discharge capacities were 107 and 104 mAh/g for the pouch cell both with and without the optical probe, which indicates that the optical probe did not significantly affect the performance and capacity of the cell. The optical probe was inserted into the pouch cell to measure the fluorescence intensity of the dye that was dissolved in the electrolyte. Time series experiments before charging demonstrated that the fluorescence intensity was stable for at least 24 hours. However, the fluorescence intensity decreased abruptly as the voltage of the pouch cell increased during the initial stages of charging, which means that the dye (DMA) could not be employed to detect the oxygen generated in the cell. Both the real-time fluorescence spectroscopy and the cyclic voltammetry illustrated that this dye was not suitable for the in-situ fluorescence tests. The electrochemical stability at room temperature of different dyes such as anthracene, Palladium (II) meso-tetrakis (pentafluorophenyl porphyrin)_(PTTFPP) and Platinum octaethylporphyrin_(PtOEP) were examined in the organic solvents used in the electrolytes in Li-ion cells. Cyclic voltammograms of anthracene and PTTFPP showed oxidation peaks at 2V and reduction peaks at around 1V, with the possible formation of the radical anion causing spectral changes. The chemical compound 1-hexyl-3- methylimidazolium bis (trifluormethylsulfonyl)imide_(HMIM BTI) was electrochemically stable, but the fluorescence intensity was too low (5% of dye DMA) to be used in the in-situ detection of oxygen. As a result, more work must be performed in the future to find a suitable dye. Keywords: fluorescence spectroscopy, in-situ Li-ion cell operation, quencheroxygen, the Stern-Volmer relationship
M.S. in Chemical Engineeering, July 2016
Show less

Title: AN EMPIRICAL APPROACH TO GASSIFICATION PROCESS MODELING AND ASSESSMENT
Creator: Rahmaninejad, Fatemeh
Date: 2013-05-01, 2013-05
Description: There has been growing interest in estimating the flow rate and composition of fuel gases produced from gasification of coal and other...
Show moreThere has been growing interest in estimating the flow rate and composition of fuel gases produced from gasification of coal and other carbonaceous solid fuels. In general, coal gasification processes are complex, and because of the high costs associated with the experimental investigations, modeling and simulation tools are needed to assist with the design, analysis, and optimization of these complex processes. Most of the efforts in the development of gasifier models have focused on two different approaches; equilibrium modeling and kinetic modeling. The chemical equilibrium approach assumes the gasification reactions have sufficiently fast kinetics and reach global chemical reaction equilibria, which leads to over-prediction of the extent of the gasification reactions [1, 2, 3]. On the other hand, the kinetic based models require detailed knowledge of hydrodynamic and reaction kinetics of the heterogeneous and homogeneous chemical reactions [4, 5]. Because of the dependence of the product gas (composition and flow rate) on a broad ranges of certain key operating variables such as gasifier design, configuration, and coal type the gasification model needs to take into account the effect of those parameters based on available experimental data. In this study, a versatile and user-friendly gasifier simulation model was developed which incorporates a MS Excel interface aiming to provide a guide to gasification process analysis, evaluation and improvement. The model uses a set of empirical “default” correlations, for the reaction conversions that were obtained from xi regression analysis of the available experimental data to predict the syngas composition, flow rate, and performance of the gasifier based on the operating conditions specified by the user. The results of the parametric studies performed for assessment of the effect of operating conditions are discussed and presented.
M.S. in Chemical Engineering, May 2013
Show less

Title: The hydrogenation of coal tar and coal tar oils
Creator: Melichar, Robert S.
Date: 2009, 1919
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/hydrogenationofc00meli
Thesis (B.S.)--Armour Institute of Technology; Bibliography: leaf 36

Title: Heat treatment of high speed steels
Creator: Miller, Philip F, Bornstein, Hymen
Date: 2009, 1911
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/heattreatmentofh00mill
Thesis (B.S.)--Armour Institute of Technology, 1911 B.S. in Chemical Engineering, 1911

Title: PROTEOLYTIC STABILITY OF FIBRONECTIN CONJUGATED TO POLYETHYLENE GLYCOL: EFFECT OF PEG LENGTH TO CYSTEINE RESIDUES
Creator: Hekmatfar, Sogol
Date: 2013, 2013-07
Description: Fibronectin (FN) is an essential protein of the extracellular matrix (ECM) needed in wound healing. In chronic wounds, the high levels of...
Show moreFibronectin (FN) is an essential protein of the extracellular matrix (ECM) needed in wound healing. In chronic wounds, the high levels of protease in the wound bed lead to excessive degradation of fibronectin, which delays the healing process. Developing a proteolytically stable and functionally active form of FN is the main purpose of this research. Conjugating of proteins to polyethylene glycol (PEG) or PEGylating proteins showed more proteolytic stability than native FN degradation without perturbing their activity. The goal of this study was to compare the proteolysis of native and PEGylated fibronectin with different PEG length. Fibronectin was purified from human blood plasma and conjugated to PEG Diacrylate (PEGDA) and other types of PEG to yield the PEGylated human plasma fibronectin (PEG-HPFN). α-chymotrypsin and neutrophil elastase were used as digestion enzyme during degradation reaction. The proteolysis reaction was stopped at different time points with protein inhibitor phenylmethanesulfonylfluoride (PMSF). The samples were analyzed by SDS-PAGE followed by silver staining or immunblotting with antibodies specific to human fibronectin. Densitometric analyses of the polyacrylamide gels or the blots demonstrated that PEG-HPFN was more stable than native HPFN. The results demonstrate that PEGylation is a robust approach for stabilizing fibronectin. Future studies into activity of PEGylated proteins as well as the role of PEGylation factors such as extent of PEGylation or PEG length on activity will provide novel strategies of mitigating fibronectin degradation in chronic wounds.
M.S. in Chemical Engineering, July 2013
Show less

Title: Methods for the oxidation of potassium manganate
Creator: Johnson, F. R., Pearson, A.
Date: 2009, 1918
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/methodsforoxidat00john
Thesis (B.S.)--Armour Institute of Technology

Title: The low temperature distillation of a Wyoming coal
Creator: Bolte, C.l., Durant, R.f.
Date: 2009, 1917
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/lowtemperaturedi00bolt
Thesis (B.S.)--Armour Institute of Technology

Title: Investigation of the chemical literature
Creator: Barrows, Frank E.
Date: 2009, 1919
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/investigationofc00barr
Thesis (B.S.)--Armour Institute of Technology

Title: ELECTROCATALYSTS FOR ALKALINE WATER ELECTROCATALYSIS
Creator: Jain, Anchal
Date: 2016, 2016-07
Description: Hydrogen is an attractive energy carrier and is part of an idealistic future wherein it serves as a clean energy source. In the presence of...
Show moreHydrogen is an attractive energy carrier and is part of an idealistic future wherein it serves as a clean energy source. In the presence of oxygen, it can be converted to water in fuel cells with the release of heat and electrical work. Electrolysis of water is an important route to hydrogen generation. Alkaline water electrolysis is preferred over electrolysis in acidic medium due to the possibility of lowering stack costs and enhancing the library of stable electrocatalyst materials available for the electrochemical reactions. The high anode overpotential arising from the sluggish oxygen evolution reaction (OER) has led to significant interest in developing stable and active OER electrocatalysts. IrO2 (state of the art catalyst), RuO2 and PGM-based pyrochlores are suitable catalyst materials that exist today, but there is benefit in finding cost-effective alternatives. In this study, the pyrochlore oxides containing non- Platinum Group Metals (non-PGM) metals were synthesized by solid state reaction and were tested for their OER activity but none of the materials tested, exhibited OER activity and a comparison was attempted between the pyrochlores containing PGM metals as against those containing non-PGM metals. Additionally, perovskite oxides of the form La[Ni(1-x-y)CoxFey]O3 (where 0≤x≤1 and 0≤y≤1) were synthesized by the co-precipitation method. Many of these perovskites exhibited electron conductivities greater than 0.1S/cm, eliminating the need to add carbon for OER studies and implying the likelihood of making conducting electrodes with these materials without the additives like carbon. The perovskites LaNi0.6Co0.4O3 or LaNi0.6Fe0.4O3 with x/y =0.4 had conductivities of the order of 10S/cm. The electrocatalytic activity for the OER was studied using a rotating disk electrode (RDE) in 0.1M KOH and catalyst loading of ~100μg/cm2. The perovskite LaNi0.5Co0.5O3 (x=0.5, y=0) had the onset potential of ~1.50V against RHE, and all these perovskites had onset potentials ~0.1-0.15V higher than the benchmark IrO2 that has an onset potential of ~1.43V. Few of the perovskites were also evaluated for their oxygen reduction activity (ORR) implying that these materials can be used as bi-functional catalysts.
M.S. in Chemical Engineering, July 2016
Show less

Title: Heat treatment of chrome tungsten high speed tool steels
Creator: Perlstein, Harris, Lesser, David Barnes
Date: 2009, 1914
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/heattreatmentofc00perl
Thesis (B.S.)--Armour Institute of Technology

Title: Heat transmission in condenser coils
Creator: Anderson, W. J., Judson, L. D.
Date: 2009, 1921
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/heattransmission00ande
Thesis (B.S.)--Armour Institute of Technology; Bibliography: leaf 33

Title: Heat transmission in a vacuum evaporator
Creator: Dormitzer, H. C., Roleson, E. P.
Date: 2009, 1912
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/heattransmission00dorm
Thesis (B.S.)--Armour Institute of Technology

Title: EXTENSIONAL RHEOLOGY OF POLYISOBUTYLENE MELTS USING A COUNTER-ROTATING CYLINDERS RHEOMETER
Creator: Sun, David
Date: 2011-12-05, 2011-12
Description: Extensional rheology plays an immense role in many polymer processing operations, such as blow molding and fiber spinning. Extensional flow is...
Show moreExtensional rheology plays an immense role in many polymer processing operations, such as blow molding and fiber spinning. Extensional flow is a type of deformation that stretches a material and is sensitive to a polymer’s molecular structure. Elongational experiments are important in establishing flow models and verifying constitutive equations. Reliable extensional measurements and understanding of extensional rheology are vital for both academia and industry because they build upon the foundation for future theories, models, and applications. This study aims to understand the characteristics of a uniaxial elongation measuring technique and the validity of the data obtained. It focuses on the experimental properties of the Sentmanat Extensional Rheometer (SER), a specific uniaxial elongation rheometer, and tests the rheology for different molecular weights of polyisobutylene (PIB) melts. Through use of oscillatory shear, storage and loss modulus data are obtained and used to establish linear viscoelastic behavior. Using the SER, polyisobutylene was deformed to generate extensional viscosity data for different sample sizes, which was compared to the linear viscoelastic curve to check for consistency. Visual data analysis was used to examine deviations from ideal deformation. The results from this study were consistent with deviations seen by other researchers using the SER, and established experimental parameters that can improve performance of the SER. Based on elongational viscosity data, it is concluded that elongational viscosity does have a dependence based on sample size. In addition, this paper also quantifies the onset of surface instabilities, a phenomenon commonly seen, but not specifically reported. By utilizing the SER and different optical techniques, the development of the surface instability is examined. Analysis of the images demonstrates an appearance of surface striations that are consistent with different experimental parameters. By accurately capturing surface instabilities, they are found to be closely associated with sample deformations and onset of sample failure. By comparing visual and scattering images, the hencky strain (εinstability) at which instability occurs is consistently seen around 0.6 to 1.0. It is concluded that these striations are independent of strain rate, molecular weight, sample size, and technique. The validation of extensional viscosity’s dependence on sample size and onset of instability has great significance for uniaxial extension measuring tools, polymer processing, and extensional polymer modeling and simulation.
M.S. in Chemical Engineering, December 2011
Show less

Title: The production of magnesium by the electrolysis of the fused salts
Creator: Grossman, Alexander N
Date: 2009, 1915
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/productionofmagn00gros
Thesis (B.S.)--Armour Institute of Technology; Bibliography: leaves 1-21

repository.iit

Search the repository

Pages

Pages

Enabled Filters

Refine Results

Type

Date

Academic status of creator

Subject

Creator

Rights