Seminola (An Indian Love Song)

Sheet music includes Native American cultural appropriation, bigoted language, and/or imagry. With Ukulele arrangement. Contains advertisements and/or short musical examples of pieces being sold by publisher.https://digitalcommons.library.umaine.edu/mmb-vp/6910/thumbnail.jp

Isolation and analysis of ribonucleic acids

Ribonucleic acids are concentrated in certain parts of the cell. Separation of these parts usually precedes isolation of the ribonucleic acids they contain. This separation is accomplished by a process of cell fractionation (Mathias, 1966)

Design approaches and materials processes for ultrahigh efficiency lattice mismatched multi-junction solar cells

In this study, we report synthesis of large area (>2cm^2), crack-free GaAs and GaInP double heterostructures grown in a multi-junction solar cell-like structure by MOCVD. Initial solar cell data are also reported for GaInP top cells. These samples were grown on Ge/Si templates fabricated using wafer bonding and ion implantation induced layer transfer techniques. The double heterostructures exhibit radiative emission with uniform intensity and wavelength in regions not containing interfacial bubble defects. The minority carrier lifetime of ~1ns was estimated from photoluminescence decay measurements in both double heterostructures. We also report on the structural characteristics of heterostructures, determined via atomic force microscopy and transmission electron microscopy, and correlate these characteristics to the spatial variation of the minority carrier lifetime

Effect of alcohol addition on the movement of petroleum hydrocarbon fuels in soil

Groundwater contamination by fuel spills from aboveground and underground storage tanks has been of growing concern in recent years. This problem has been magnified by the addition of oxygenates, such as ethanol and methyl-tertiary-butyl ether (MTBE) to fuels to reduce vehicular emissions to the atmosphere. These additives, although beneficial in reducing atmospheric pollution, may, however, increase groundwater contamination due to the co-solvency of petroleum hydrocarbons and by the provision of a preferential substrate for microbial utilisation. With the introduction of ethanol to diesel fuel imminent and the move away from MTBE use in many states of the USA, the environmental implications associated with ethanol additive fuels must be thoroughly investigated. Diesel fuel movement was followed in a 1-m soil column and the effect of ethanol addition to diesel fuel on this movement determined. The addition of 51% ethanol to diesel fuel was found to enhance the downward migration of the diesel fuel components, thus increasing the risk of groundwater contamination. A novel method using soil packcd HPLC columns allowed the influence of ethanol on individual aromatic hydrocarbon movement to be studied. The levels of ethanol addition investigated were at the current additive level (approx. 25%) for ethanol additive fuels in Brazil and values above (50%) and below (10%) this level. An aqueous ethanol concentration above 10% was required for any movement to occur. At 25% aqueous ethanol, the majority of hydrocarbons were mobilised and the retention behaviour of the soil column lessened. At 50% aqueous ethanol, all the hydrocarbons were found to move unimpeded through the columns. The retention behaviour of the soil was found to change significantly when both organic matter content and silt/clay content was reduced. Unexpectedly, sandy soil with low organic matter and low silt/clay was found to have a retentive behaviour similar to sandy subsoil with moderate silt/clay, but little organic matter. It was concluded that sand grains might have a more important role in the adsorption of petroleum hydrocarbons than first realised. This method has shown that soil packed HPLC columns can be used to provide a quick estimate of petroleum hydrocarbon, and possibly other organic contaminant, movement in a variety of different soil types

Spectral and Kinetic Studies of the Interaction of Cyanide and Detergents with Cobalt (II) Phthalocyanine in DMSO

Spectral and kinetic studies made on CoPc over a concentration range of 1.72 x 10-6M – 1.00 x 10-5M in DMSO are consistent with a monomer-dimer equilibrium at 303 K. The dimerization constant obtained at 303 K is 1.67 x 104M-1 and is two to three orders of magnitude smaller than those of several tetrasulfonated metallophthalocyanines in aqueous solution. The rate constants for the formation and dissociation of the CoPc dimer in DMSO at 303 K are 1.29 x 102M-1s-1 and 7.20 x 10-3s-1, respectively. The low dimerization constant for CoPc in DMSO is attributed to its relatively slow rate of dimer formation. Introduction of cyanide, detergents, and salts to solutions of CoPc in DMSO all enhanced the dissociation of the CoPc dimer. Furthermore, both cyanide and the catonic detergent cetyl trimethylammonium bromide (CTAB) at concentrations of 6.0 x 10-2M and higher, facilitate oxidation of cobalt in CoPc. For cyanide, this is accomplished by destabilization of the metal eg electrons by back-bonding in the axial positions of CoPc while the CTAB detergent forms a micelle which encapsulates a CoPc monomer striping the dye of axial DMSO molecules in the process. Thus, oxygen can bind to the vacant axial positions on the metal. Kinetic studies of the interactions between cyanide and CoPc in DMSO show two fast reactions which are attributed to the addition of cyanide to the axial positions of CoPc. The rate constants for the addition of the first and second cyanide ligands to CoPc are 7.72 x 105M-1s-1 and 5.51 x 104M-1s-1, respectively, at 299 K. Activation parameters, ΔHs* and ΔSs* for the second cyanide addition are 9.9 kcal/mol and -4.0 e.u., respectively. Both additions are faster than the corresponding reactions with CoTSPc4- in DMSO. The three detergents sodium dodecyl sulfate (SDS), Triton X-100, and cetyl trimethylammonium bromide (CTAB) dissociate the CoPc dimer more than by dilution with DMSO. Furthermore, Triton X-100 dissociates the CoPc dimer at about the same rate as CTAB while SDS is not as efficient at comparable concentrations to CTAB. The critical micelle concentration for the CTAB-DMSO system is reached at a CTAB concentration of 6.0 x 10-2M where the CoPc dimer dissociation rate nearly triples compared to solvent dilution and oxidation of the metal in CoPc is observed. The addition of tetraethylammonium bromide, tetrapropylammonium bromide and tetrabutylammonium bromide to CoPc in DMSO increases the dimer dissociation rate by a factor of two compared to dilution with DMSO. All salts dissociate the CoPc dimer at similar rates suggesting the hydrocarbon chain is of insufficient length to be as effective as CTAB. Finally, oxygen does not seem to effect the dissociation of the CoPc dimer in DMS

Seminola

Illustration of Native American woman with chief and tents in background; Photograph of Dan Russo\u27s and Ted Fiorito\u27s Oriole Orchestrahttps://scholarsjunction.msstate.edu/cht-sheet-music/12172/thumbnail.jp