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Visar resultat 1 - 5 av 21 uppsatser som matchar ovanstående sökkriterier.

  1. 1. Quality parameters and protein profile in raw milk from individual cows with different lactation number and breed

    Master-uppsats, SLU/Department of Molecular Sciences

    Författare :Jennifer Hallqvist; [2022]
    Nyckelord :Raw milk quality; protein profile; actation number; Swedish Red; Swedish Holstein;

    Sammanfattning : Swedish dairy cows have an average life expectancy of 5 years, which means that each cow undergoes about 2.5 lactation cycles through her life. Reasons for culling dairy cows are mainly impaired fertility, udder health (mastitis) and low milk yield. LÄS MER

  3. 2. Changes in bull breeding during the years : a comparison between 1950 and 1980/90 century

    Master-uppsats, SLU/Dept. of Animal Breeding and Genetics

    Författare :Moa Hagelberg; [2020]
    Nyckelord :Bulls; breeding; SNP; traits; decades; production; health; SLB; Holstein; SRB;

    Sammanfattning : Breeding on bulls have occurred during many decades in the same way as it has for dairy cattle. Both the sire and dams that are being used during the selection breeding have been tested through genomic selection to see their value for each trait, for the dams this has been started more recently than for the bulls. LÄS MER

  4. 3. Composition and processability of milk from older cows : a pilot study on milk quality differences between young and old cows

    Master-uppsats, SLU/Department of Molecular Sciences

    Författare :Gabriella Apelthun; [2020]
    Nyckelord :Raw milk quality; lactation number; gel firmness; rennet coagulation time; Swedish Holstein; Swedish Red;

    Sammanfattning : Most Swedish dairy cow’s life expectancy is five years, which is 2.5 lactations. The most common reason for dairy cows being culled are e.g. LÄS MER

  5. 4. Total proteolysis in bovine raw bulk milk of Northern Sweden

    Master-uppsats, SLU/Department of Molecular Sciences

    Författare :Elina Toss Ekmyr; [2020]
    Nyckelord :total proteolysis; plasmin; SDS PAGE; total bacteria count; somatic cell counts;

    Sammanfattning : Proteases are enzymes that catalyze protein breakdown. The major indigenous protease is plasmin, that together with proteases originating from somatic cells and bacteria, accounts for most of the proteolytic activity in bovine milk. In many dairy products, the key characteristics depends on the concentration and composition of the milk proteins. LÄS MER

  7. 5. Individuella skillnader i grovfoderintag hos mjölkkor : sambandet mellan grovfoderintag och djuregenskaper

    Master-uppsats, SLU/Dept. of Animal Nutrition and Management

    Författare :Filippa Larsson; [2019]
    Nyckelord :mjölkkor; foderintag; grovfoderintag; konsumtionsförmåga; djurfaktorer; grovfoder; ensilage;

    Sammanfattning : Dagens mjölkkor utfodras med stora mängder kraftfoder för att åstadkomma en hög mjölkavkastning. Kornas matsmältningsapparat är uppbyggt för att kunna inta stora mängder grovfoder och i Sverige har vi goda förutsättningar för att producera vallfo-der av hög kvalité. LÄS MER