For many years authors have repeated stories and myths about Frank Lloyd Wright, overstating purported influences and unjustly degrading periods of Wright’s work. Discrepancies in Wright’s own discourses have not made the task of characterizing him any easier. To better understand Wright’s works and influences, the focus must shift to those who have authored the narratives about Wright. Among the most important of these was Edgar Kaufmann jr. [sic]. Other early Wright commentators, such as Henry-Russell Hitchcock, Grant Carpenter Manson, and Bruno Zevi are usually mentioned before Kaufmann, but Kaufmann published more about Wright than any one else, until his death in 1989. Hitchcock worked on twenty-two books and articles about Wright, Manson on nine, and Zevi on seventeen. Kaufmann authored thirty works about Wright, more than Zevi and Manson combined. Kaufmann is generally referred to as the son of Fallingwater, but his Wrightian scholarship and design theory extended far beyond his role in bequeathing his family’s famous retreat. Kaufmann’s writing career spanned over three decades and included more than forty works, with topics about Wright, “Good Design,” skyscrapers, and the museum industry. His writings reveal a complex scholar who at times was led by the trends of his time, and who was not afraid to reevaluate and redefine his past work. From Kaufmann’s first article about Wright in Art News, to his work establishing Fallingwater’s tour program, he communicated Wright’s methods and analyzed his rhetoric. During Wright’s lifetime, Kaufmann followed his wishes for interpreting his work. But after Wright’s death, Kaufmann was swayed by a number of contemporary ideas, such as indeterminacy and systems. Most of Kaufmann’s writings focused on Wright’s later architecture, clarifying his rhetoric, discussing his influences and space, and telling the history of Fallingwater. Kaufmann is a key figure in the narrative about Wright because of his unique perspective as a student, a client, and a friend that no other historian can claim. Deciphering Kaufmann’s writings allows for an examination of one of the major voices behind Wright’s story. / text

Univ., Diss./2001--Rostock, 2000.

Zugl.: Bremen, Univ., Diss., 2008

Thesis (M.A.S.A.)--Ohio State University, 1950. / Available online via OhioLINK's ETD Center

Zugl.: Bremen, Universiẗat, Diss., 2008.

The goal of this project is to establish an efficient and economical industrial process for extraction of a Kaufmann and Tobschirbel orbitide (KT) mixture from flaxseed oil. KTs occur at a low level in flaxseed oil and must be concentrated at least 600 fold to produce a useful commercial concentrate. KT peptides are more polar than most lipids may be separated using solid- or liquid- phase extractants. Extraction protocols were investigated to determine a better approach for KT peptide extraction. Commercial solid-phase extraction methods would require the adaptation of bench-scale silica flash column chromatography. The first approach was to develop methods for separation of peptides using only silica, ethyl acetate and ethanol. Ethyl acetate is known to remove both oil and peptides from silica. Therefore, the ability of low temperature to decrease the peptide elution from silica was studied. The other method utilized liquid-liquid extraction. In order to measure the success of an extraction an analytical method was required to evaluate the separation of peptides from oil. An analytical procedure was developed that readily determined the relative concentration of peptide and lipid. Aqueous and anhydrous ethanol partitioning was used to extract the KT mixture from flaxseed oil. Ethanol solutions between 50 and 100% in water (v/v) were mixed with flaxseed oil. The oil and peptide content of the extracts were determined using 1H-NMR. Liquid-liquid extraction using 70% aqueous ethanol at volume ratio (solvent to oil) of 0.25:1 produced a mole ratio of 2:1 (KTs to oil) making it the optimal solvent for KT extraction. In the second part of this project, the scale of liquid-liquid extraction was increased through several 10 to 30-fold steps to establish a potential industrial extraction process for recovery of the KT mixture. The feasibility of processing the solvent containing mixed peptides was investigated. Multiple evaporation and adsorption methods were also tested, including falling film evaporation, rotary evaporation, a combination of rotary evaporation and freeze drying, and a combination of rotary evaporation and spray drying. Various experimental methods to enrich and isolate KTs from water-rich fraction were performed. At the end of this project, 3328.89 g of KT mixture was produced that was suitable for commercial purposes. The increase of extraction scale was 140,000 fold.

Zugl.: Augsburg, Univ., Diss., 2004/2005

Jena, Univ., Diss., 2009.

Texte remanié de: Diss.--Katholisch-Theologische Fakultät--Münster--Westfälische Wilhelms-Universität, 1998. / Bibliogr. p. 567-598.

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