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.
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Showing 1 to 20 of 45 for “"Lower Portion"”.
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The Asymmetric Synthesis Of The C1'-C10' Portion of Pamamycin-621A
… thesis describes the synthesis of the C1'-C10' portion 72 of the pamamycin-621A using a cuprate conjugate addition to join enone fragment 52 and organostannane fragment 64a. Fragments 52 and 64a were both synthesized from (S)-methylketene dimer 51.
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Stratigraphy of the Inyan Kara Formation (Lower Cretaceous) in the vicinity of the Nesson Anticline, northwestern North Dakota
<p>The Lower Cretaceous Inyan Kara Formation, at the base of the Dakota Group, consists of sandstone, siltstone, shale, and coal. The stratigraphy of the Inyan Kara and facies relationships within the formation and with the underlying Swift and overlying Skull Creek Formations in the vicinity of …
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The micropaleontology and stratigraphy of the subsurface "Heath" formation (Mississippian-Pennsylvanian) of western North Dakota
… by a conglomeratic horizon, separates the lower two from the upper three units.</p> <p>The fauna of the “Heath” Formation includes non-marine ostracodes, with which this study is primarily concerned, and non-marine pelecypods and syncarid crustaceans which occur in units intertonguing with …
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Terrestrial Impacts of the Central Atlantic Magmatic Province on western Pangea
… and δ13Ccarbonate, respectively, in the lower portion of the Whitmore Point Member. Warner Valley does not show a prominent negative carbon isotope excursion but has been correlated to the positive isotope excursion and main negative isotope excursion exhibited within Potter Canyon. …
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Flood Capacity Improvement of San Jose Creek Channel Using HEC-RAS
… several intense flood events as a result. The lower portion of the creek was diverted in 1960 to alleviate flooding through Old Town Goleta. However, flooding still occurred in the storms of 1995 and 1998. This study incorporates a hydraulic analysis component of a project aimed at re-designing …
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Experimental investigation of the fluid velocity distribution in stirred tank reactors equipped with retreat-blade impellers using laser doppler velocimetry
… of the velocity components except in the lower portion of the tank, where the hemispherical bottom generated a stronger axial and radial recirculation pattern. The velocity distribution in the single-baffle case was found to be only partially different from the unbaffled case, and …
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Subsurface Sequence Stratigraphy and Reservoir Characterization of the Mississippian Limestone (Kinderhookian to Meramecian), South Central Kansas and North Central Oklahoma
… unconventional reservoir target occurs in the lower porosity, cherty, mud-rich intervals that occur in the lower portion of the Mississippian succession. </p> <p>There has been considerable debate surrounding the sequence stratigraphic interpretations, depositional models, and formation names …
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A Subsurface Stratigraphic Study of the Middle Atoka, Sebastian County, Arkansas
… Middle Atoka in the Arkoma Basin of the western portion (Sebastian County) of Arkansas. The most significant sandstone units of the Middle Atoka in this area were determined to be two generally coarsening-upward sequences in the lower portion of the formation. Based on lithologic correlations, …
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A remedial approach to stabilize a deep excavation in Singapore
… of the application of cementing agents to the lower portion of the marine clay externally to the excavation side. The effectiveness of the proposed ground improvement is examined using a finite element model corresponding to a key cross-section of CCL1 project.
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Structure elucidation and studies relating to the synthesis of plasmalopentaene-12
… acting fecal mutagen that is formed in the lower portion of the gastrointestional tract by anaerobic bacteria. The biological precursor to fecapentaene-12 is a natural product of mammalian origin whose role in the etiology of colon cancer is unknown. Preliminary evidence indicated that the …
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Significance of magma mingling and mixing during the formation of the host-rock successions of Archean massive sulfide deposits in the Noranda camp, Abitibi subprovince, Quebec, The
… tabular xenoliths are abundantly present in the lower portion of the cryptodome and become increasingly sparse, blocky, and irregularly distributed and shaped up-stratigraphy. Flow banding around the xenoliths is well developed in the lower portion of the rhyolite. The contacts between the mafic …
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Defect Detection in Selective Laser Melting
… the build envelope. Reducing warpage enabled the lower portion of the part to be printed intact, preserving it to experience cracking later in the build. From physical evidence on the part as well as time stamps from the machine script, several high energy impulse events in the accelerometer data …
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Sexual adjustment of women undergoing pelvic exenteration with vaginal reconstruction
… exenteration includes removal of the bladder, lower portion of the bowel, and the female reproductive organs (including the uterus, ovaries, fallopian tubes and vagina). The myocutaneous gracilis graft procedure is the preferred technique for neovaginal reconstruction. This study assesses the …
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THUNDERCLOUD ELECTRIC FIELD SOUNDINGS WITH INSTRUMENTED FREE BALLOONS
… and wind profile along its track. During a major portion of its ascent, the instrument was in an intense updraft. We infer a maximum vertical wind component of about 15m/s. Horizontal flow, at 10-15m/s towards the northeast, was encountered above 7000m (msl). The behavior of the electric vector …
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Construction and testing of a respiratory apparatus for equine
… rubber inhalation valves were located along the lower portion of the mask permitting the animal to inspire atmospheric air. Four one-way rubber exhalation valves were situated in the false bottom of the mask. When the animal expired, the inhalation valves were forced shut and the exhalation …
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The Neoproterozoic São Francisco Basin, central Brazil: tectonic evolution, paleoclimate, and mineral systems
… Post-glacial glauconitic siltstones form the lower portion of Sequence 6 and are evidence of marine transgression during the peak of oceanic ventilation. Greywackes and conglomerates in upper Sequence 6 record basin closure by ca. 550 Ma. The organic-rich, pyritiferous, deep-water siltstones …
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Effects of climate change on mammalian fauna composition and structure during the advent of North American continental glaciation in the Pliocene
… climatic patterns. The cooling through the lower portion of the Glenns Ferry Formation corresponds to variation in the morphology of individual species, the relative abundance of species, and the species-level diversity of mammalian groups. There is a return to warm temperatures near the top …
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Food Habits of Walleyes in Lake Oahe, South Dakota
… water. Macroinvertebrates were not a substantial portion of the diet of YOY walleyes. The only macroinvertebrates found in walleye stomachs were ephemerids and chironomids, which were also found to be prevalent in Ekman grab samples. Walleye food habits were also determined at nine stations …
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Recent foraminifera of Trinity Bay, Texas
… the abundance of Elphidium delicatulum inhabits portions of the deltaic margin. The bay assemblage is a mixture of species either endemic to the brackish-water environment or occurring in both brackish-water and marine habitats. Tests of the cosmopolitan species are calcareous whereas tests of …
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Correlation and Paleoenvironments above West T9.3 Tuff, Pisco Formation, Peru
… interpretations for a time-bounded unit in the lower part of the Miocene Pisco Formation. In this study, we correlated, mapped, and dated a tuff couplet and associated beds over 25 km2. We measured eight sections that include the tuffs and conducted detailed facies analysis. Sections were broken …
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