Composition and properties of bovine milk: A study from dairy farms in northern Sweden; Part II. Effect of monthly variation
This study investigated the influence of monthly variation on the composition and properties of raw farm milk collected as part of a full-scale cheese-making trial in a region in northern Sweden. In our companion paper, the contribution of on-farm factors to the variation in milk quality attributes...
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Umeå universitet, Kemiska institutionen
2021
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ftumeauniv:oai:DiVA.org:umu-186182 2023-10-09T21:54:32+02:00 Composition and properties of bovine milk: A study from dairy farms in northern Sweden; Part II. Effect of monthly variation Priyashantha, Hasitha Lundh, Åse Höjer, Annika Bernes, Gun Nilsson, David Hetta, Mårten Saedén, Karin Hallin Gustafsson, Anders H. Johansson, Monika 2021 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-186182 https://doi.org/10.3168/jds.2020-19651 eng eng Umeå universitet, Kemiska institutionen Department of Molecular Sciences, Swedish University of Agricultural Sciences, Uppsala, Sweden Norrmejerier Ek. Förening, Umeå, Sweden Department of Agricultural Research for Northern Sweden, Swedish University of Agricultural Sciences, Umeå, Sweden 2 Norrmejerier Ek. Förening, Umeå, Sweden Växa Sverige, Uppsala, Sweden Journal of Dairy Science, 0022-0302, 2021, 104:8, s. 8595-8609 http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-186182 doi:10.3168/jds.2020-19651 ISI:000672155100018 Scopus 2-s2.0-85109409353 info:eu-repo/semantics/openAccess casein micelle size monthly variation raw milk characteristic season total proteolysis Food Science Livsmedelsvetenskap Article in journal info:eu-repo/semantics/article text 2021 ftumeauniv https://doi.org/10.3168/jds.2020-19651 2023-09-22T14:01:39Z This study investigated the influence of monthly variation on the composition and properties of raw farm milk collected as part of a full-scale cheese-making trial in a region in northern Sweden. In our companion paper, the contribution of on-farm factors to the variation in milk quality attributes is described. In total, 42 dairy farms were recruited for the study, and farm milk samples were collected monthly over 1 yr and characterized for quality attributes of importance for cheese making. Principal component analysis suggested that milk samples collected during the outdoor period (June–September) were different from milk samples collected during the indoor period. Despite the interaction with the milking system, the results showed that fat and protein concentrations were lower in milk collected during May through August, and lactose concentration was higher in milk collected during April through July than for the other months. Concentrations of free fatty acids were generally low, with the highest value (0.86 mmol/100 g of fat) observed in February and the lowest (0.70 mmol/100 g of fat) observed in June. Plasmin and plasminogen-derived activities varied with sampling month without a clear seasonal pattern. The pH of farm tank milk ranged from 6.60 to 6.82, with the lowest and highest values in September and February, respectively. The highest somatic cell count was observed in August (201 × 103 cells/mL) and the lowest in April (143 × 103 cells/mL). The highest value of gel strength, was recorded in December (88 Pa) and the lowest in July (64 Pa). Rennet coagulation time and gel strength were inversely correlated, with the lowest rennet coagulation time value observed in December. Orthogonal projections to latent structures (OPLS) and discriminant analysis adaptation of OPLS identified casein micelle size and total proteolysis as the milk quality attributes with major responses to sampling month, with smaller casein micelle size and higher total proteolysis associated with the outdoor months. Using ... Article in Journal/Newspaper Northern Sweden Umeå University: Publications (DiVA) Journal of Dairy Science 104 8 8595 8609 |
institution |
Open Polar |
collection |
Umeå University: Publications (DiVA) |
op_collection_id |
ftumeauniv |
language |
English |
topic |
casein micelle size monthly variation raw milk characteristic season total proteolysis Food Science Livsmedelsvetenskap |
spellingShingle |
casein micelle size monthly variation raw milk characteristic season total proteolysis Food Science Livsmedelsvetenskap Priyashantha, Hasitha Lundh, Åse Höjer, Annika Bernes, Gun Nilsson, David Hetta, Mårten Saedén, Karin Hallin Gustafsson, Anders H. Johansson, Monika Composition and properties of bovine milk: A study from dairy farms in northern Sweden; Part II. Effect of monthly variation |
topic_facet |
casein micelle size monthly variation raw milk characteristic season total proteolysis Food Science Livsmedelsvetenskap |
description |
This study investigated the influence of monthly variation on the composition and properties of raw farm milk collected as part of a full-scale cheese-making trial in a region in northern Sweden. In our companion paper, the contribution of on-farm factors to the variation in milk quality attributes is described. In total, 42 dairy farms were recruited for the study, and farm milk samples were collected monthly over 1 yr and characterized for quality attributes of importance for cheese making. Principal component analysis suggested that milk samples collected during the outdoor period (June–September) were different from milk samples collected during the indoor period. Despite the interaction with the milking system, the results showed that fat and protein concentrations were lower in milk collected during May through August, and lactose concentration was higher in milk collected during April through July than for the other months. Concentrations of free fatty acids were generally low, with the highest value (0.86 mmol/100 g of fat) observed in February and the lowest (0.70 mmol/100 g of fat) observed in June. Plasmin and plasminogen-derived activities varied with sampling month without a clear seasonal pattern. The pH of farm tank milk ranged from 6.60 to 6.82, with the lowest and highest values in September and February, respectively. The highest somatic cell count was observed in August (201 × 103 cells/mL) and the lowest in April (143 × 103 cells/mL). The highest value of gel strength, was recorded in December (88 Pa) and the lowest in July (64 Pa). Rennet coagulation time and gel strength were inversely correlated, with the lowest rennet coagulation time value observed in December. Orthogonal projections to latent structures (OPLS) and discriminant analysis adaptation of OPLS identified casein micelle size and total proteolysis as the milk quality attributes with major responses to sampling month, with smaller casein micelle size and higher total proteolysis associated with the outdoor months. Using ... |
format |
Article in Journal/Newspaper |
author |
Priyashantha, Hasitha Lundh, Åse Höjer, Annika Bernes, Gun Nilsson, David Hetta, Mårten Saedén, Karin Hallin Gustafsson, Anders H. Johansson, Monika |
author_facet |
Priyashantha, Hasitha Lundh, Åse Höjer, Annika Bernes, Gun Nilsson, David Hetta, Mårten Saedén, Karin Hallin Gustafsson, Anders H. Johansson, Monika |
author_sort |
Priyashantha, Hasitha |
title |
Composition and properties of bovine milk: A study from dairy farms in northern Sweden; Part II. Effect of monthly variation |
title_short |
Composition and properties of bovine milk: A study from dairy farms in northern Sweden; Part II. Effect of monthly variation |
title_full |
Composition and properties of bovine milk: A study from dairy farms in northern Sweden; Part II. Effect of monthly variation |
title_fullStr |
Composition and properties of bovine milk: A study from dairy farms in northern Sweden; Part II. Effect of monthly variation |
title_full_unstemmed |
Composition and properties of bovine milk: A study from dairy farms in northern Sweden; Part II. Effect of monthly variation |
title_sort |
composition and properties of bovine milk: a study from dairy farms in northern sweden; part ii. effect of monthly variation |
publisher |
Umeå universitet, Kemiska institutionen |
publishDate |
2021 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-186182 https://doi.org/10.3168/jds.2020-19651 |
genre |
Northern Sweden |
genre_facet |
Northern Sweden |
op_relation |
Journal of Dairy Science, 0022-0302, 2021, 104:8, s. 8595-8609 http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-186182 doi:10.3168/jds.2020-19651 ISI:000672155100018 Scopus 2-s2.0-85109409353 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3168/jds.2020-19651 |
container_title |
Journal of Dairy Science |
container_volume |
104 |
container_issue |
8 |
container_start_page |
8595 |
op_container_end_page |
8609 |
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1779318130721423360 |