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Synthesis of hcp-Co Nanodisks

Description: hcp Co disk-shaped nanocrystals were obtained by rapid decomposition of cobalt carbonyl in presence of linear amines. Other surfactants, in addition to the amines, like phosphine oxides and oleic acid were used to improve size dispersion, shape control and nanocrystal stability. Co disks are ferromagnetic in character and they spontaneously self-assemble into long ribbons. X-ray and electron diffraction, electron microscopy and SQUID magnetometry have been employed to characterize this material. more
Date: June 11, 2002
Creator: Puntes, Victor F.; Zanchet, Daniela; Erdonmez, Can K. & Alivisatos, A. P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Atmospheric Pressure Flow Reactor / Aerosol Mass Spectrometer Studies of Tropospheric Aerosol Nucleat and Growth Kinetics. Final Report, June, 2001

Description: The objective of this program was to determine the mechanisms and rates of growth and transformation and growth processes that control secondary aerosol particles in both the clear and polluted troposphere. The experimental plan coupled an aerosol mass spectrometer (AMS) with a chemical ionization mass spectrometer to provide simultaneous measurement of condensed and particle phases. The first task investigated the kinetics of tropospheric particle growth and transformation by measuring vapor a… more
Date: June 1, 2001
Creator: Worsnop, Douglas R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Selective Electrocatalytic Activity of Ligand Stabilized Copper Oxide Nanoparticles

Description: Ligand stabilization can influence the surface chemistry of Cu oxide nanoparticles (NPs) and provide unique product distributions for electrocatalytic methanol (MeOH) oxidation and CO{sub 2} reduction reactions. Oleic acid (OA) stabilized Cu{sub 2}O and CuO NPs promote the MeOH oxidation reaction with 88% and 99.97% selective HCOH formation, respectively. Alternatively, CO{sub 2} is the only reaction product detected for bulk Cu oxides and Cu oxide NPs with no ligands or weakly interacting liga… more
Date: January 1, 2011
Creator: Kauffman, Douglas R.; Ohodnicki, Paul R.; Kail, Brian W & Matranga, Christopher
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Novel Bioplastics and biocomposites from Vegetable Oils

Description: Polymeric materials have been prevalent in our everyday lives for quite a long time. Most of today's polymeric materials are derived from nonrenewable petroleum-based feedstocks. Instabilities in the regions where petroleum is drilled, along with an increased demand in petroleum, have driven the price of crude oil to record high prices. This, in effect, increases the price of petroleum-based polymeric materials, which has caused a heightened awareness of renewable alternatives for polymeric fee… more
Date: August 18, 2008
Creator: Henna, Phillip H.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
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Improved Soybean Oil for Biodiesel Fuel

Description: The goal of this program was to generate information on the utility of soybean germplasm that produces oil, high in oleic acid and low in saturated fatty acids, for its use as a biodiesel. Moreover, data was ascertained on the quality of the derived soybean meal (protein component), and the agronomic performance of this novel soybean germplasm. Gathering data on these later two areas is critical, with respect to the first, soybean meal (protein) component is a major driver for commodity soybean… more
Date: November 30, 2007
Creator: Clemente, Tom & Gerpen, Jon Van
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A Study of the Effects of Elevated Temperatures on the Growth and Inheritance of Saccharomyces Cerevisiae

Description: A comparative study was made of the growth of yeast in various media at the optimum temperature (30 ) and at supraoptimum temperatures. It was found that at elevated temperatures there is a decrease in the ability of yeast to grow, which may be alleviated by increasing the percentage of yeast extract in the medium, adding oleic acid to the medium, or using an inoculum of cells that have previously been grown at the elevated temperature. Because of these findings, it is believed that growth at e… more
Date: November 1, 1958
Creator: Sherman, F.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
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Tellurium-123m-labeled isosteres of palmitoleic and oleic acids show high myocardial uptake

Description: These studies were directed at determining if the telluro fatty acids prepared by the isosteric replacement of the ..delta../sup 9/-double bonds of oleic and palmitoleic acids with /sup 123m/Te would show heart uptake in rats. The isostere of palmitoleic acid, 9-tellurapentadecanoic acid(II), was prepared by basic hydrolysis of the product formed by the coupling of /sup 123m/Te-sodium hexyl tellurol with methyl-8-bromooctadecanoate. Similarly, the isostere of oleic acid, 9-telluraheptadecanoic … more
Date: 1979~
Creator: Knapp, Furn F., Jr.; Ambrose, Kathleen R.; Callahan, Alvin P.; Grigsby, Robert A. & Irgolic, Kurt J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The chemical enhancement of the triboelectric separation of coal from pyrite and ash: A novel approach for electrostatic separation of mineral matter from coal

Description: Arthur D. Little, Inc., under contract to the US DOE Pittsburgh Energy Technology Center, has developed a triboelectric separation device for coal beneficiation, that employs an entrained-flow, rotating-cylinder concept. The described apparatus has been used to test the efficacy of chemical pretreatment and in-situ treatment of coal on separation efficiency. Coal particle entrainment is achieved with gaseous carbon dioxide and particle collection is accomplished by an electrostatic plate separa… more
Date: February 1, 1992
Creator: Gustafson, R.M.; DiMare, S. & Sabatini, J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Polarized Neutron Study of the Magnetization Density Distribution Within a Cofe/Sub 2/O/Sub 4/ Colloidal Particle (Magnetization Density in a Colloidal Cofe/Sub 2/O/Sub 4/ Crystallite)

Description: Magnetization and Moessbauer data suggest that a magnetically anomalous region exists within finely divided CoFe/sub 2/O/sub 4/ particles when coated with oleic acid. We have undertaken an x-ray and a polarized neutron powder diffraction study of these samples with and without the surfactant coating in an attempt to locate and characterize this anomalous zone. The shape of neutron scans of the (4,0,0) reflection are independent of polarization indicating that the reflecting crystallites are uni… more
Date: January 1, 1983
Creator: Nunes, A. C.; Majkrzak, C. F. & Berkowitz, A. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The chemical enhancement of the triboelectric separation of coal from pyrite and ash: A novel approach for electrostatic separation of mineral matter from coal. Final report

Description: Arthur D. Little, Inc., under contract to the US DOE Pittsburgh Energy Technology Center, has developed a triboelectric separation device for coal beneficiation, that employs an entrained-flow, rotating-cylinder concept. The described apparatus has been used to test the efficacy of chemical pretreatment and in-situ treatment of coal on separation efficiency. Coal particle entrainment is achieved with gaseous carbon dioxide and particle collection is accomplished by an electrostatic plate separa… more
Date: February 1, 1992
Creator: Gustafson, R. M.; DiMare, S. & Sabatini, J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Toxicological Evaluation of Liquids Proposed for Use in Direct Contact Liquid--Liquid Heat Exchangers for Solar Heated and Cooled Buildings

Description: This report contains the results of the toxicological evaluation part of the project entitled, ''Direct Contact Liquid-Liquid Heat Exchangers for Solar Heated and Cooled Buildings.'' Obviously any liquid otherwise suitable for use in such a device should be subjected to a toxicological evaluation. 34 liquids (24 denser than water, 10 less dense) have physical and chemical properties that would make them suitable for use in such a device. In addition to the complexity involved in selecting the m… more
Date: September 1, 1976
Creator: Buchan, R. M.; Majestic, J. R. & Billau, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Experimental study of diffusion charging of aerosols

Description: The electrical charging of aerosol particles by unipolar gaseous ions was studied theoretically and experimentally. The primary objective of the study was to make precise determinations of the aerosol particle charge under various conditions of charging and to compare the experimental results with those predicted by theory. Experiments were performed using monodisperse oleic acid aerosols generated by a vibrating orifice generator, monodisperse NaCl and DOP (di-octyl phthalate) aerosols generat… more
Date: March 1, 1976
Creator: Pui, D. Y. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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