Tübingen, Universiẗat, Diss., 2001.

Thesis (Ph. D.)--University of Washington, 2003. / Vita. Includes bibliographical references (p. 103-118).

This thesis demonstrates how tidal changes in the availability of intertidal zone habitats can affect the distribution and behaviour of juvenile pollock (Pollachius virens). Schools of pollock moved from the subtidal zone to the open habitat in the intertidal zone. On rising tides, pollock switched from the open habitat at low tidal stages to the dense algal habitat at high tidal stages. On falling tides, pollock rapidly schooled downshore in the open habitat. Pollock were rarely solitary in the open habitat and usually formed large schools. In the algal habitats, pollock were usually dispersed and preferred the dense algae over the sparse algae. Predation risk from birds was widely distributed among depths, habitats and stages of the tide, during the day. In a mesocosm experiment, pollock increased their use of the algal habitat and were more difficult to detect following a simulated bird predator threat. Preference for the algal habitat was density-dependent when either pollock abundance or algal habitat area were manipulated. Pollock responded to their potentially high density in the algae by schooling in the open habitat.

No description available.

The objective of these studies was to develop an analog from surimi that would resemble abalone. Preliminary studies involved the standardization of batter preparation conditions, such as pH adjustment, optimum moisture content and batter mixing time. The texture of a gelled analog prepared with different protein adjuncts egg white, gluten and bovine serum albumin) was compared with cooked abalone for hardness, elasticity, and cohesiveness by a trained sensory evaluation panel and by instrumental methods. Serial levels of sodium carbonate were used to adjust the pH of the sol from pH 6.75 to 7.73. As the pH value rose, the textural strength of kamaboko correspondingly increased. The 0.1% level of sodium carbonate was determined suitable for further use. The moisture level in kamaboko caused significant variations in hardness (P<0.001) and cohesiveness (P<0.001). At the lowest level of moisture tested, 73.24%, gel hardness was greatest (l27N/g); with a 5% increase in moisture, the gel hardness was lower (52N/g). Sol mixing time (solubilization of myofibrillar proteins) was a very important factor to significantly affect gel texture for properties of hardness (P<0.00l), elasticity (P=0.002) and cohesiveness (P<0.001). To produce a strong, elastic and cohesive gel, 30 minutes mixing was required. In serial concentrations (O to 4%), egg white, gluten, and bovine serum albumin, were evaluated for enhancement of textural parameters in order to produce an imitation abalone product. The addition of either egg white or gluten at the two percent level resulted in the greatest hardness and most cohesive gels (P<0.001). Two percent added bovine serum albumin significantly improved gel hardness and elasticity (P=0.003 and P=0.0149, respectively). A shredded gel containing one of three protein adjuncts was effective in varying the final gel texture when incorporated with a surimi-based carrier. In overall parameters, the trained sensory evaluation panel judged the analog gel containing bovine serum albumin texturized chunks (at a 70:30 ratio to carrier) closest to cooked abalone. The instrumental measurements of textural parameters were slightly less discriminating than the trained sensory panel. / Graduation date: 1989

Sharon Pollock's plays have made a significant contribution to Canadian drama over the last three decades; however, the majority of scholarly research on her work has concentrated on one particular play-Blood Relations-and for the most part these studies focus on feminism and metadrama. My thesis examines Pollock's use of the memory play and how within this genre the playwright metaphorically places one (or more) of her characters under investigation. The notion of memory is present in practically all of her plays, but to focus my argument I select dramatic works where a rememberer distinctly guides the audience from the play's present into the past. Because several of her memory plays are based on historical events I use an historiographical approach to illuminate her texts. In the six Pollock works that I examine a crime or social wrongdoing has taken place in the past, and one of the central characters needs to revisit the injustice from the play's present. Through memory, the past is restaged and the character who experiences the inquiry tries to understand, justify, and/or defend his or her position in the events. Instead of determining if the characters are legally responsible for the crime or wrongdoing, my investigation focuses on their level of moral responsibility in the social injustice. I propose to examine the moral inquiries within Pollock's work in the context of three types of memory plays, and these form the basis of my three main chapters: third-person memory (Walsh, The Komagata Mam Incident), first-person memory (One Tiger to a Hill, Moving Pictures), and multi-person memory (Doc, Fair Liberty's Calf).

Chapter 1. A brief introduction is given reviewing the physiology and biochemistry of fish myotomal muscle. Aspects of protein turnover and metabolism in muscle are discussed and related with previous studies on starvation and refeeding in both mammals and fish. Chapter 2. The marine teleost Pollachius virens L. undergoes a natural starvation during the winter months, and provides a reversible, non-pathological model for studying muscle wasting. In this study fish were kept without food under laboratory conditions for up to 12 weeks. The effects of starvation on muscle fibre cross-sectional area, volume fractions of mitochondria and myofibrils, and capillary supply were determined. Mechanisms of myofibrillar degradation during muscle wasting are discussed. Chapter 3. Starvation in the winter months is followed by a period of refeeding in the late spring, and the musculature degraded during the winter is regenerated. In the present study muscle fine structure has been investigated for fish kept without food, under laboratory conditions, for 74 days, and following 10, 20, and 54 days' refeeding. Muscle fibre cross-sectional area, capillary supply, and volume fractions of myofibrils, nuclei and mitochondria were determined from electron micrographs, using digital planimetry and stereological techniques. In contrast to the starvation atrophy observed in chapter 2 the 74 day starvation reported in this chapter resulted in a decrease in the mean fibre cross-sectional area in both fast and slow muscle. Chapter 4. Experiments were performed using SDS/polyacrylamide gel electrophoresis, to consider the effects of starvation on the relative abundance of actin and myosin heavy chains. Both slow and fast muscle proteins were analysed from control and 66 day starved fish, using densitometric scans of comassie blue stained polyacrylamide gels. The results were expressed as the ratio of each protein relative to actin. Chapter 5. A wide range of biochemical parameters were determined to consider the metabolic effects of starvation and refeeding in saithe. Chapter 6. This chapter investigates the involvement of acid hydrolases and the lysosomal system in muscle atrophy and regeneration, during starvation and refeeding. The results suggest a role for lysosomal enzymes in the breakdown of myofibrillar proteins during starvation. Chapter 7. The results are discussed with reference to the overall strategy of fish to survive starvation immediately followed by a period of rapid muscle repair and growth, during refeeding. The mechanisms Involved in the disassembly and degradation of the myofibrillar proteins are discussed with specific reference to the involvment of the sarcoplasmic reticulum, t-tubules and proteinases. Suggestions are made for further work that may give an insight into some of the questions generated by this research.

Sharon Pollock's plays have made a significant contribution to Canadian drama over the last three decades; however, the majority of scholarly research on her work has concentrated on one particular play-Blood Relations-and for the most part these studies focus on feminism and metadrama. My thesis examines Pollock's use of the memory play and how within this genre the playwright metaphorically places one (or more) of her characters under investigation. The notion of memory is present in practically all of her plays, but to focus my argument I select dramatic works where a rememberer distinctly guides the audience from the play's present into the past. Because several of her memory plays are based on historical events I use an historiographical approach to illuminate her texts. In the six Pollock works that I examine a crime or social wrongdoing has taken place in the past, and one of the central characters needs to revisit the injustice from the play's present. Through memory, the past is restaged and the character who experiences the inquiry tries to understand, justify, and/or defend his or her position in the events. Instead of determining if the characters are legally responsible for the crime or wrongdoing, my investigation focuses on their level of moral responsibility in the social injustice. I propose to examine the moral inquiries within Pollock's work in the context of three types of memory plays, and these form the basis of my three main chapters: third-person memory (Walsh, The Komagata Mam Incident), first-person memory (One Tiger to a Hill, Moving Pictures), and multi-person memory (Doc, Fair Liberty's Calf). / Arts, Faculty of / Theatre and Film, Department of / Graduate

Thesis (Ph. D.)--University of Washington, 1999. / Vita. Includes bibliographical references (leaves 242-257).

Thesis (Ph. D.)--University of Texas at Austin, 2006. / Vita. Includes bibliographical references.