Norbert Pfennig, a German microbiologist, isolated the first true acidophilic purple bacterium in 1969. He named the organism Rhodoblastus acidophilus. Since the original work of Pfennig, no study has examined the phylogeny and physiology of the original strains of R. acidophilus or isolated any new strains. In this thesis six new strains of acidophilic purple nonsulfur bacteria were isolated from a Canadian Sphagnum peat bog. Moreover, three original Pfennig strains of R. acidophilus and two uncharacterized strains (previously isolated by Michael Madigan) were included in experiments aimed to describe the new isolates and further our understanding of the species Rhodoblastus acidophilus. Although pigmentation varied, all of the strains studied were very similar. The 16S rRNA genes of the new bog isolates and the original strains of R. acidophilus and Rhodoblastus sphagnicola, another acidophilic purple phototroph isolated from a Sphagnum peat bog in Russia, showed a 16S rRNA gene sequence similarity greater than or equal to 97%. All isolates were acidophilic and grew best photoheterotrophically on certain organic or fatty acids, or alcohols as carbon sources. Despite subtle physiological differences, all of the strains shared many characteristics. This indicates that R. acidophilus is a reasonably homogenous species and suggests that diversity of the acidophilic phototrophs may be low.

xi, 91 leaves : ill. Typescript Thesis (M.S.)--University of Oregon Includes vita and abstract Bibliography: leaves 87-91 Another copy on microfilm is located in Archives University of Oregon theses, Dept. of Biology, M.S., 1982

Hemigrapsus oregonensis and Hemigrapsus nudus, two beach crabs common on the Pacific Coast of North America, show considerable variation in numbers, and species dominance from place to place. To determine why this should be so, a number of experiments were performed, and observations made to determine what are the morphological, and physiological differences between the two species, and how the crabs would be affected by the different physical conditions prevailing in different places. In general, it appeared that H. nudus could not tolerate muddiness of the substrate, while H. oregonensis tended to be eliminated from clean areas by predators. The abundance of the crabs appears to be correlated with the amount of cover available. / Science, Faculty of / Zoology, Department of / Graduate

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A MAGAZINE – A game of Chutes and Ladders – a network of pools connected by streams, rivulets, creeks and rivers. Concerns: aluminum, sculpture, film, an endless image or an image-object, cork, shoulders as the center of movement, archery, wicker, nystagmus, darkness or the penumbral near-darkness, constant movement, beer, tone, musical forms, bells, gongs, The Titanic, purple, black and white, indeterminacy, Ghostface, yodeling, John Smith, John Adams, David Hammons, Beyoncé, Honda CR-V’s, Har-khebi, Ahnighito, Hermann Doomer, Prince, Yvonne Rainer, perception, double rainbows, composers from Transylvania, Los Angeles, and chandeliers. “Everything is everything.” and “A woman is the first teacher.”

Evidence suggests that purple dye was produced on the islet of Mitrou, a Bronze Age and Early Iron Age site in central Greece. The goal of this study is to determine the chronological and spatial patterning of Murex shells in order to better understand the emergence of dye manufacture. The research hypothesis is that Murex dye production was related to the rise of a visible political elite and that the scale of production was large enough at Mitrou to have exceeded the needs of the household, thus providing a cash crop for this elite to obtain imports from the Eastern Mediterranean. Multi-layered statistical analyses were employed to test this two-pronged hypothesis. The first hypothesis that Murex dye production was related to the rise of the elite at Mitrou was confirmed by a series of chi-squared analyses. Based on site-wide estimates of original Murex population, the second hypothesis that dye production exceeded domestic scale cannot be rejected. Since we know the prehistoric Mycenaeans produced very ornate, multi-colored and often banded garments, it is possible that Murex dye was produced at Mitrou to color raw wool for the production of thread, which could then be embroidered on fabric or traded as such. If it was in fact colored thread that was being produced, the site-wide estimates suggest that dye production could have exceeded domestic levels at Mitrou and dyed thread could have been a lucrative trading commodity.