Thesis (M.Sc.) -- University of Adelaide, Dept. of Pharmacology, 1984. / Typescript (photocopy).

2 pp. / Successful Xeriscapes start with good planning and design. This brochure will help homeowners and landscapers design landscapes that are attractive, low water and low maintenance.

2 pp. / The most difficult part of conversion from a lawn to a low water (xeriscape) landscape is the removal of a lawn. By removing a Bermuda grass lawn, it is estimated that water savings of 50 -75% is possible. Potential water savings comes from the fact that water is applied to a limited amount of total yard space, compared to the greater water needs of a continuous grass-covered area. Also, by planting low water use plants, less maintenance is required and substantial cost savings can be realized. Turf removal and subsequent weed suppression is achievable using readily available herbicides.

Water is essential to sustaining aquatic environments and is also a resource upon which many human-sectors depend. During times of reduced supply, competition or conflict may arise regarding its distribution due to its importance to local economies and its life giving benefits. The Ontario Low Water Response (OLWR) Plan is designed to deal with how water might be allocated under situations of reduced supply. When forced with data from the Coupled Global Climate Model 1 (CGCM1), the Guelph All Weather Storm Event Runoff (GAWSER) hydrologic model projects scenarios of reduced flows for the Grand River watershed, an area within the Province of Ontario. A level III declaration, which marks the highest stage of water emergency has never before been declared in the Province of Ontario, meaning there is uncertainty regarding how OLWR might operate. Using one scenario of climate change, this study explores the resiliency of the OLWR mechanism to operate under the demands of a changing climate and a growing population through interviews. Results show that the mechanism is not resilient enough to operate under conditions of reduced flow due to ambiguity in the mechanism and the tendency for humans to trump environmental uses of water, leading to detrimental effects on the fishery. Recommendations from this study suggest that ambiguities in the mechanism be revisited and clarified with a shift towards a proactive approach in order for environmental integrity to be upheld under scenarios of reduced flow.

Water is essential to sustaining aquatic environments and is also a resource upon which many human-sectors depend. During times of reduced supply, competition or conflict may arise regarding its distribution due to its importance to local economies and its life giving benefits. The Ontario Low Water Response (OLWR) Plan is designed to deal with how water might be allocated under situations of reduced supply. When forced with data from the Coupled Global Climate Model 1 (CGCM1), the Guelph All Weather Storm Event Runoff (GAWSER) hydrologic model projects scenarios of reduced flows for the Grand River watershed, an area within the Province of Ontario. A level III declaration, which marks the highest stage of water emergency has never before been declared in the Province of Ontario, meaning there is uncertainty regarding how OLWR might operate. Using one scenario of climate change, this study explores the resiliency of the OLWR mechanism to operate under the demands of a changing climate and a growing population through interviews. Results show that the mechanism is not resilient enough to operate under conditions of reduced flow due to ambiguity in the mechanism and the tendency for humans to trump environmental uses of water, leading to detrimental effects on the fishery. Recommendations from this study suggest that ambiguities in the mechanism be revisited and clarified with a shift towards a proactive approach in order for environmental integrity to be upheld under scenarios of reduced flow.

Water is essential to sustaining aquatic environments and is also a resource upon which many human-sectors depend. During times of reduced supply, competition or conflict may arise regarding its distribution due to its importance to local economies and its life giving benefits. The Ontario Low Water Response (OLWR) Plan is designed to deal with how water might be allocated under situations of reduced supply. When forced with data from the Coupled Global Climate Model 1 (CGCM1), the Guelph All Weather Storm Event Runoff (GAWSER) hydrologic model projects scenarios of reduced flows for the Grand River watershed, an area within the Province of Ontario. A level III declaration, which marks the highest stage of water emergency has never before been declared in the Province of Ontario, meaning there is uncertainty regarding how OLWR might operate. Using one scenario of climate change, this study explores the resiliency of the OLWR mechanism to operate under the demands of a changing climate and a growing population through interviews. Results show that the mechanism is not resilient enough to operate under conditions of reduced flow due to ambiguity in the mechanism and the tendency for humans to trump environmental uses of water, leading to detrimental effects on the fishery. Recommendations from this study suggest that ambiguities in the mechanism be revisited and clarified with a shift towards a proactive approach in order for environmental integrity to be upheld under scenarios of reduced flow.

Water is essential to sustaining aquatic environments and is also a resource upon which many human-sectors depend. During times of reduced supply, competition or conflict may arise regarding its distribution due to its importance to local economies and its life giving benefits. The Ontario Low Water Response (OLWR) Plan is designed to deal with how water might be allocated under situations of reduced supply. When forced with data from the Coupled Global Climate Model 1 (CGCM1), the Guelph All Weather Storm Event Runoff (GAWSER) hydrologic model projects scenarios of reduced flows for the Grand River watershed, an area within the Province of Ontario. A level III declaration, which marks the highest stage of water emergency has never before been declared in the Province of Ontario, meaning there is uncertainty regarding how OLWR might operate. Using one scenario of climate change, this study explores the resiliency of the OLWR mechanism to operate under the demands of a changing climate and a growing population through interviews. Results show that the mechanism is not resilient enough to operate under conditions of reduced flow due to ambiguity in the mechanism and the tendency for humans to trump environmental uses of water, leading to detrimental effects on the fishery. Recommendations from this study suggest that ambiguities in the mechanism be revisited and clarified with a shift towards a proactive approach in order for environmental integrity to be upheld under scenarios of reduced flow.

No description available.

Salmonella enterica has been associated with several outbreaks due to consumption of low water activity foods including spices. Consequently, to improve microbiological quality, spices are commonly treated before ultimately reaching consumers. These processes may result in sub-lethal injury to cells, which can lead to an underestimation of microbial populations when plating on selective media. Sub-lethally injured cells are difficult to enumerate due to reduced ability to grow on selective microbiological media. Poor recovery of sub-lethally-injured cells may obscure process validation results and lead to overestimation of process effect. Therefore, this work was performed to determine the influence of agar overlay and media supplementation methods on the recovery of Salmonella from steam and ethylene oxide treated peppercorns and cumin seeds. Traditional agar overlay allowed recovery of significantly more Salmonella (p < 0.05) from inoculated peppercorns treated with steam (65.5C, 15 sec.) than selective media (XLT4) or solid agar overlay. Additional supplementation of the TSA base to contain 3,3'-thiodipropionic acid further improved Salmonella recovery from steam treated peppercorns (p < 0.05). For peppercorns and cumin seeds subjected to ethylene oxide, neither sodium pyruvate + yeast extract, 3,3'-thiodipropionic acid, glycerophosphate, ATP, nor magnesium enhanced recovery compared to overlay alone but both methods recovered significantly higher numbers than XLT-4 alone (p < 0.05) for both cumin seeds and peppercorns. / Master of Science in Life Sciences

Salmonella contamination of spices and other low water activity foods is a growing concern for the food industry due to increased frequency of salmonellosis outbreaks and detection-based product recalls. The impact of inoculation preparation on the survival of a Salmonella enterica and its proposed surrogate, Enterococcus faecium NRRL B-2385, on the whole black peppercorns and cumin seeds was examined. Three liquid inoculation methods (biofilm-inclusion, agar-grown, broth-grown) for Salmonella enterica and surrogate Enterococcus faecium and one dry transfer method for Salmonella enterica were developed then applied to whole peppercorn and cumin seeds. Spices were returned to original water activity (aw 0.3) and stored for 28 days with periodic sampling (0, 1, 7, 14, 21, 28 days) and surviving bacteria enumerated. Average log reductions (LR) over time were statistically analyzed to determine differences in stability during storage. Inoculation preparation was associated with significant differences in recovered Salmonella and Enterococcus from both peppercorn and cumin over the storage period. At 28 days, the most stable inoculations of Salmonella resulted from the biofilm-inclusion (-0.04 CFU/g LR) and agar grown (-0.75 CFU/g LR) methods on peppercorn and the biofilm inclusion method (-0.28 CFU/g LR) on cumin. Log reductions of Enterococcus faecium (-0.02 CFU/g LR biofilm-inclusion-peppercorn, -0.19 CFU/g LR agar-grown-peppercorn, -0.61 CFU/g LR biofilm-inclusion-cumin) were comparable to Salmonella after 28d desiccated storage. These results will guide the inoculation strategies for validating inactivation processes for reducing Salmonella on whole spices, and for comparisons of inactivation of Salmonella and its proposed surrogate Enterococcus faecium. / Master of Science in Life Sciences