Index Catalog // ScholarsArchive@OSU

The isolation and structure of leptosphaerin : a metabolite of the marine ascomycete, Leptosphaeria oraemaris (Linder) and A synthesis of the marine toxin, 9-isocyanopupukeanane

Creator:: Schiehser, Guy Alan
Abstract:: The ethyl acetate extract of the culture filtrate of the marine Ascomycete, Leptosphaeria oraemaris (Linder) yielded a novel metabolite designated by the common name leptosphaerin. An x-ray crystallographic structure analysis was disproved by the synthesis of 3-acetoxy-S-(1,2-dihydroxyethyl)- 3-pyrrolin-2-one 1, starting with N,N-dibenzylhydroxylamine 47 and D-mannitol 44. Oxidation of 47 followed...
Resource Type:: Dissertation
Full Text:: ethyldiazoacetate to give 4-carboxyethyl-l-methoxy-5-methyltricyclo[5.1.0.03'5]octane 26. Acid catalyzed

A preliminary vegetation classification of the Tombstone, Arizona, vicinity

Creator:: Garcia-Moya, Edmundo, 1941-
Abstract:: The need for classifying vegetation in a more precise way is evident. Also, there is a need to provide a hierarchical classification scheme that will match changes in image characteristics as one moves through the scales from space to conventional aerial photography. Such refined classifications of vegetation are the first...
Resource Type:: Dissertation
Full Text:: species) of Alliance III (Fouquieria splendens-Acacia constricta-Aloysia wrightii) Association L (Agave

Information processing errors in linear feedback control systems

Creator:: Chong, Hoi-yeung
Abstract:: This report is concerned with the analysis of the effect of finite wordlength, channel capacity and source rate in digital feedback control of linear systems. The cases considered are (1) finite wordlength A/D conversion, no feedback delay, ideal ROM (read only memory) controller; (2) finite A/D wordlength (source rate), state...
Resource Type:: Dissertation
Full Text:: r2 0 0 0 rri -t E = L. 2 41 where each r,, i=1, 2,..m, is randomly distributed in (-1, 1), and

Use of benthic sediments as indicators of marina flushing

Creator:: Noble, Scott Morgan
Abstract:: This report presents the findings of a sediment analysis program formulated to determine the flushing potential of various shaped small boat marina basins. Chemical tests regarding volatile solids, Kjeldahl nitrogen, grease and oil, and sulfides were performed with the results compared to established sediment quality criteria. These results were used...
Resource Type:: Masters Thesis
Full Text:: Privacy Dean of Gradutete School Date thesis is presented September 7, 1976 Typed by Deanna L. Cramer

The determination and characterization of preferred orientation and the elastic anisotropy of rolled copper sheet

Creator:: Wilson, Dale
Abstract:: Relatively simple methods are developed for obtaining discreet orientation characterization of preferred orientation from x-ray diffraction-determined pole figure data. It is demonstrated how this information, along with the single crystal elastic constants, can be used to calculate Young's modulus as a function of sheet direction. Computer programs are developed for...
Resource Type:: Dissertation
Full Text:: . Howard, Lewis L. Gutzman, and. John E. Kelley of the Bureau of Mines Department of Metallurgical

The distribution of intertidal diatoms associated with the sediments of Yaquina Estuary, Oregon

Creator:: Amspoker, Michael C.
Abstract:: Sediment samples were collected from eight sampling sites along the Yaquina Estuary, Oregon from Yaquina Bay to Elk City near the head of the estuary. Samples were collected in November 1973, February 1974, May 1974 and August 1974 from two or three intertidal levels depending on the magnitude of the...
Resource Type:: Dissertation
Full Text:: the mear cel,l size of diatoms associated with marine tropical sand increased as particle size and

A comparative study of the infauna of the Central Oregon continental shelf

Creator:: Bertrand, Gerard A. (Gerard Adrian)
Resource Type:: Dissertation
Full Text:: . Carey and by the Sea Grant Pro- gram, Grant GH97. TABLE OF CONTENTS L INTRODUCTION MATERIALS AND

The distribution of epiphytic diatoms in Yaquina Estuary, Oregon

Creator:: Main, Stephen Paul
Abstract:: Epiphytic diatom assemblages in the intertidal zone of Yaquina Bay and estuary were obtained from the following host macrophytes: Zostera marina, Fucus evanescens, and species of Enteromorpha, Polysiphonia, and Ulva. Samples were collected in September 1970 and in January and May 1971 from seven stations approximately evenly spaced between the...
Resource Type:: Dissertation
Full Text:: the more widely distributed macroalgae and Zostera marina L. A. study by Kjeldsen (1967) indicated

Structure and productivity of marine benthic diatom communities in a laboratory model ecosystem

Creator:: Wulff, Barry Lee
Abstract:: Effects of light intensity, exposure to desiccation, reduced salinity, and thermal elevation on the functional and structural characteristics of marine benthic diatom communities were investigated in a laboratory model ecosystem and a respirometer chamber. Measurements of biomass (dry weight and ash-free dry weight) and chlorophyll a were made for each...
Resource Type:: Dissertation
Full Text:: above condition is: Q n n. log Bi = - loge orir ,l ir N. e N. r= B. = exp r n. it N. loge 11. n

Single rod wetting with simulated fuel-cladding gap

Creator:: Gaines, Stephen Frank
Resource Type:: Masters Thesis
Full Text:: - Temperature T' - Coolant temperature T L Leidenfrost temperature T n Quench temperature at point u T o

ScholarsArchive@OSU

The isolation and structure of leptosphaerin : a metabolite of the marine ascomycete, Leptosphaeria oraemaris (Linder) and A synthesis of the marine toxin, 9-isocyanopupukeanane

A preliminary vegetation classification of the Tombstone, Arizona, vicinity

Information processing errors in linear feedback control systems

Use of benthic sediments as indicators of marina flushing

The determination and characterization of preferred orientation and the elastic anisotropy of rolled copper sheet

The distribution of intertidal diatoms associated with the sediments of Yaquina Estuary, Oregon

A comparative study of the infauna of the Central Oregon continental shelf

The distribution of epiphytic diatoms in Yaquina Estuary, Oregon

Structure and productivity of marine benthic diatom communities in a laboratory model ecosystem

Single rod wetting with simulated fuel-cladding gap

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