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Submitted by Ana Paula Lisboa Monteiro (monteiro@univates.br) on 2009-05-11T14:17:16Z No. of bitstreams: 1 DeboraCerutti.pdf: 2617243 bytes, checksum: 8bab260c6b58c94503ef3461ac0f2b08 (MD5) / Made available in DSpace on 2009-05-11T14:17:16Z (GMT). No. of bitstreams: 1 DeboraCerutti.pdf: 2617243 bytes, checksum: 8bab260c6b58c94503ef3461ac0f2b08 (MD5) / A Arnica montana é um fitoterápico comumente utilizado com fins medicinais devido ao efeito anti-inflamatório que possui. Da mesma forma, o equipamento de Ultra-som Terapêutico (UST) é utilizado na Fisioterapia para controlar sinais inflamatórios como dor e edema, além de, através da fonoforese, veicular substâncias através da pele devido a sua capacidade de alterar a permeabilidade da membrana celular, proporcionando desta forma, aumento da absorção de substâncias de uso terapêutico. Considerando os efeitos da Arnica montana, da técnica de fonoforese através do ultra-som e o desenvolvimento tecnológico de medicamentos de origem vegetal, o objetivo geral da presente pesquisa é investigar o potencial de degradação da Arnica montana quando submetida ao uso de UST, através de fonoforese, por meio de técnicas de espectrofotometria, voltametria cíclica e amperometria. Para esta análise, foram utilizadas amostras de extrato glicólico de Arnica montana na diluição de 100 mL/L. O ultra-som foi aplicado no modo contínuo e pulsado (a 100 Hz com ciclos de duração de pulso de 20%) na intensidade de 1,0 W/cm2, nos tempos de 0, 5, 15, e 25 minutos. As técnicas de espectrofotometria, voltametria cíclica e amperometria foram realizadas antes e após a exposição das amostras ao Ultra-Som, construíndo-se curvas analíticas comparadas às curvas obtidas na ausência de radiação. Os resultados demonstram possibilidade de detecção da degradação da Arnica montana através das técnicas analíticas utilizadas. Sendo assim, concluiu-se que a ação física e química do US, tanto contínuo quanto pulsado, promove alteração eletroquímica do substrato estudado (Arnica montana) envolvendo o solvente (água) e também o extrato. A degradação do extrato de Arnica (formação de subprodutos) permite sugerir o aumento da mobilidade molecular, fator este positivo no que se refere ao uso do US, através da técnica de fonoforese.

This study utilizes a multidisciplinary research approach integrating the sciences of archaeology, geology, pedology and paleoclimatology. Deeply stratified and radiocarbon dated sedimentary sequences spanning the last 10,000 yr B.P. are reported for the Cremer site (24SW264), south-central Montana. Previous investigations at the site revealed an archaeological assemblage with Early Plains Archaic through Late Prehistoric period affiliations. Expanded testing of the site integrates the existing cultural record with new data pertaining to Holocene environmental changes at this northwestern Great Plains locality. Detailed pedological descriptions were made along three trenches excavated at the site. The combined soil-stratigraphic record indicates that distinct intervals of relative landscape stability and soil development occurred at the site at ca. 10,000 yr B.P., 7,500 yr B.P. and intermittently throughout the last ca. 6,000 yr B.P. Periods of significant landscape instability (upland erosion and valley deposition) occurred immediately following each of the early Holocene soil forming intervals identified above, and episodically throughout the middle to late Holocene. The impetus for early Holocene environmental instability is attributed to generally increased aridity on the northwestern Great Plains. Comparative analyses of site data with both regional environmental proxy records and numerical models of past climates (General Circulation and Archaeoclimatic models) are made to test the findings from the Cremer site. The collective paleoenvironmental evidence indicates that the period of maximum post-glacial warming and aridity occurred at the Cremer site during the early Holocene period (prior to ca. 6,000 yr B.P.). These data also indicate that the existing archaeological assemblage from the site is younger than ca. 6,000 yr B.P., although future excavations may reveal cultural sequences associated with the earliest dated soils at the site. This geoarchaeological study of the Cremer site should contribute to a much needed research base in this sparsely studied region. / Graduation date: 1999

Intermediate igneous rocks exposed in the Badger Pass area and 3.5 km away in the McDowell Springs area of Beaverhead County, Montana, previously mapped as Cretaceous intrusive (Ki), and Cretaceous undifferentiated volcanics (Kvu) respectively, exhibit little geochemical variation. Trace element, and lead isotope analyses provide strong evidence allowing for a single source. REE patterns, obtained through ID-ICP-MS, are essentially identical. Mineral/melt Eu analyses reveal that Eu behaved predominantly as a divalent cation, refuting an earlier study asserting that trivalent Eu dominated. Data suggest rocks were formed under low oxygen activity conditions, not oxidizing conditions as previously reported. Geochemical data combined with field mapping allow us to establish the temporal relationship between late Cretaceous thrusting, intrusion, and volcanism in this locale. Folding, faulting and thrusting were significantly, if not entirely, completed prior to the commencement of volcanism. Volcanism included contemporaneous thrust plate intrusion, foreland extrusion, and hypabyssal foreland intrusion.

This investigation focuses on the Jurassic-Eocene sedimentary record of northwestern Montana and the geometry and kinematics of the thrust belt, in order to develop a unifying geodynamic-stratigraphic model to explain the evolution of the Cordilleran retroarc of this region. Provenance and subsidence analyses suggest the onset of a foreland basin system by Middle Jurassic time. U-Pb ages of detrital zircons and detrital modes of sandstones indicate provenance from accreted terranes and deformed miogeoclinal rocks. Subsidence commenced at ∼170 Ma and followed a sigmoidal pattern characteristic of foreland basin systems. Jurassic deposits of the Ellis Group and Morrison Formation accumulated in a back-bulge depozone. A regional unconformity/paleosol zone separates the Morrison from Cretaceous deposits. This unconformity was possible result of forebulge migration, decreased dynamic subsidence, and eustatic sea level fall. The late Barremian(?)-early Albian Kootenai Formation is the first unit in the foreland that consistently thickens westward. The subsidence curve at this time begins to show a convex-upward pattern characteristic of foredeeps. The location of thrust belt structures during the Late Jurassic and Early Cretaceous is uncertain, but provenance information indicates exhumation of the Intermontane and Omineca belts, and deformation of miogeocline strata, possibly on the western part of the Purcell anticlinorium. By Albian time, the thrust belt had propagated to the east and incorporated Proterozoic rocks of the Belt Supergroup as indicated by provenance data in the Blackleaf Formation, and by cross-cutting relationships in thrust sheets involving Belt rocks. From Late Cretaceous to early Eocene time the retroarc developed a series of thrust systems including the Moyie, Snowshoe, Libby, Pinkham, Lewis-Eldorado-Steinbach-Hoadley, the Sawtooth Range and the foothills structures. The final stage in the evolution of the compressive retroarc system is recorded by the Paleocene-early Eocene Fort Union and Wasatch Formations, which are preserved in the distal foreland. A new ∼145 Km balanced cross-section indicates ∼130 km of shortening. Cross-cutting relationships, thermochronology and geochronology suggest that most shortening along the frontal part of the thrust belt occurred between the mid-Campanian to Ypresian (∼75-52 Ma), indicating a shortening rate of ∼5.6 mm/y. Extensional orogenic collapse began during the middle Eocene.

Diss. (sammanfattning) Uppsala : Sveriges lantbruksuniv. / Härtill 5 uppsatser.

Thesis (M.A.)--University of Montana, 2008. / Title from title screen. Description based on contents viewed Aug. 13, 2008. Includes bibliographical references (p. 40-41).

Thesis (M.A.)--Montana State University--Bozeman, 2004. / Typescript. Chairperson, Graduate Committee: Greg Keeler. Includes bibliographical references (leaves 58-59).

Thesis (M. Nursing)--Montana State University--Bozeman, 2006. / Typescript. Chairperson, Graduate Committee: Patricia Holkup. Includes bibliographical references (leaves 118-125).

Thesis (M.A.)--University of Montana, 2007. / Title from title screen. Description based on contents viewed July 12, 2007. Includes bibliographical references (p. 100-108).