A total of 853 milk samples with different phenotypes of $ kappa$-casein ($ kappa$-CN) and $ beta$-lactoglobulin ($ beta$-LG) and different preheating temperatures of 30, 70, 75 and 80$ sp circ$C were used for the making of individual laboratory scale Cheddar type cheese and for the determination of coagulating properties. Data obtained from milk input, cheese output and chemical analyses were used to calculate actual, 37% moisture adjusted and Van Slyke's theoretical yields and yield efficiency. Least squares analyses of data indicated that higher 37% moisture adjusted yields and yield efficiencies were obtained with milk types VII, VIII and IX, which have the B gene for $ kappa$-CN when compared to milk types I, II and III, which have the A gene for $ kappa$-CN irrespective of preheating temperatures. Moisture adjusted yield, 10.49%, was the highest when milk type VII containing $ kappa$-CN BB and $ beta$-LG AA phenotypes was preheated at 30$ sp circ$C, whereas milk type IX, which has phenotype BB for $ kappa$-CN and BB for $ beta$-LG, had the highest adjusted yields with values of 11.36, 11.91 and 11.99% when preheated at 70, 75 and 80$ sp circ$C, respectively. When cheese was made from milk preheated at 30$ sp circ$C, total solids (64.19%), fat (35.31%) and protein (25.82%) were highest in cheese obtained from milk types IX, VII and IX, respectively, all of which have the B gene for $ kappa$-CN. These three components (61.54%, 30.85% and 24.47%) were lowest in cheese made from milk types III, III and I, respectively, all of which have the A gene for $ kappa$-CN. Cheese with moisture content close to 39% were produced by milk types I and II preheated at 30$ sp circ$C. by milk types III, IV, V, VI, VII and VIII preheated at below 70$ sp circ$C and by milk type IX preheated at below 75$ sp circ$C. (Abstract shorted by UMI.)
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.23877 |
| Date | January 1996 |
| Creators | Choi, Jongwoo |
| Contributors | Hang, Ng Kwai (advisor) |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Master of Science (Department of Animal Science.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: 001505774, proquestno: MM12174, Theses scanned by UMI/ProQuest. |
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