Thesis (M.S.)--Oregon State University, 1996. / Typescript (photocopy). Includes bibliographical references. Also available online.

Thesis (M.S.) in Civil Engineering--University of Maine, 2003. / Includes vita. Includes bibliographical references (leaves 83-92 ).

Thesis (Ph. D.)--University of Wisconsin--Madison, 1934. / Reprinted from The American journal of botany, Vol. 23, No. 2, 144-158, February, 1936 and No. 4, 235-254, April, 1936. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (p. 148-149 and 248).

Thesis (Ph.D. Biological Sciences)--University of Waikato, 2007. / Includes bibliographical references (p. 409-439) Also available via the World Wide Web.

No description available.

No description available.

No description available.

The perfect stage of a species of Leptographium isolated from lesions on western white pine affected with pole blight has been described as Europhium trinacriforme and a method has been outlined for obtaining perithecia in culture. Studies on the sexuality of the fungus have revealed it to be heterothallic with two compatibility types. Cross-fertilization experiments revealed the presence of isolates which acted as either males, females or hermaphrodites. E. trinacriforme was isolated from 11 per cent of the lesions on western white pine affected with pole blight in the Interior region of British Columbia and from 84 per cent of the lesions on affected trees in the Coast region. The fungus was the only pathogenic organism isolated more than twice from lesions and it was shown to be capable of producing lesions similar in several respects to pole blight lesions. However, further data from isolation, inoculation, histological and radial growth studies have shown that pole blight lesions were not caused directly by E. trinacriforme. It is most likely that the fungus gained entrance to lesions already formed and occasionally extended them. / Science, Faculty of / Botany, Department of / Graduate

<p> A quasi-steady state optimization of an adiabatic, fixed bed tubular reactor, with catalyst decay, is considered.</p> <p> The optimal inlet temperature (distribution) To(t), is sought, so as to maximize the total amount of reaction in a fixed given period of time. Upper and lower bounds are placed on the inlet temperature.</p> <p> A single irreversible reaction is considered with a reaction rate expressible as separable functions of inlet temperature, conversion and catalyst activity.</p> <p> The rate of catalyst decay is expressed in an analogous manner and in particular, the conversion dependence is maintained.</p> <p> The optimal policy of choosing the temperature so as to maintain the exit conversion constant in time when catalyst decay is independent of conversion, is examined.</p> <p> The extension of this constant conversion policy to the present system is discounted.</p> <p> New optimum seeking methods are developed and numerical calculations presented to illustrate the optimal profiles.</p> / Thesis / Master of Engineering (MEngr)

<p> The quasi-steady state optimization of a single tubular fixed bed chemical reactor with a slowly decaying catalyst is considered. The optimal choice of temperature T(z,t) distributed in both the space of the reactor and in chronological time is sought so as to maximize the total amount of reaction in a fixed given period of time. A single irreversible reaction is considered with a rate expressible as a product of separate functions of temperature, activity and conversion. The rate of catalyst decay is also a product of separate functions of temperature and activity but independent of conversion. Upper and lower bounds are placed on the permitted temperature. Theoretical characterization of the optimal policy is obtained using Sirazetdinov and Degtyarev's maximum principle derived for first-order partial differential equations and the influence of the ratio of reaction activation energy to catalyst deactivation energy on the derived optimal policy is indicated. Numerical calculations are presented to illustrate the optimal policies.</p> / Thesis / Doctor of Philosophy (PhD)