FATTY ACID COMPOSITION WITH EMPHASIS ON  TRANS  C18:1 ISOMERS OF MILK FAT FROM LOWLAND BLACK-AND-WHITE AND POLISH RED COWS

The fatty acid composition of milk from Lowland Black-and-White and Polish Red cows was determined for the period of pasture feeding. The total fatty acid profile was determined by gas chromatography with a 50 m long polar capillary CP Sil 88 column. The content of trans C18:1 acid was determined with the same column after separating first the fraction of trans monoenoic methyl esters by silver-ion thin-layer chromatography. The milk fat from Lowland Black-and-White cows was found to have significantly higher proportion of long-chain saturated fatty acids as compared with milk fat from Polish Red cows for the same feeding conditions. The proportion of monoenoic acids, including the isomers of trans-18: 1 acid and polyenoic acids, was significantly higher in milk fat from Polish Red cows than Lowland Black-and-White cows.

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COPPER CONTENT OF MILK FAT

MILK FAT RETENTION DURING THE PRODUCTION OF SOME RIPENING CHEESES

ANNUAL CHANGES IN THE CONTENT OF UNSATURATED FATTY ACIDS WITH 18 CARBON ATOMS, INCLUDING CIS9TRANS11 C18:2 (CLA) ACID, IN MILK FAT

INFLUENCE OF STORAGE CONDITIONS ON CHANGES IN THE FAT FRACTION OF UHT MILK

CHANGES OF FAT AND CHOLESTEROL DURING THE MANUFACTURE OF SOME CHEESES.

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eISSN:	2083-6007
ISSN:	1230-0322

W latach 2022-2024 kwartalnik naukowy Polish Journal of Food and Nutrition Sciences realizuje projekt nr RCN/SP/0520/2021/1 finansowany ze środków budżetu państwa – Ministerstwo Edukacji i Nauki w ramach programu „Rozwój czasopism naukowych”. Dofinansowanie wynosi 120 000 zł. W ramach projektu podejmowane są działania zmierzające do podniesienia poziomu praktyk wydawniczych i edytorskich, zwiększenia wpływu czasopism na rozwój nauki oraz utrzymania się czasopism w międzynarodowym obiegu naukowym.

In the years 2022-2024, the scientific quarterly Polish Journal of Food and Nutrition Sciences accomplishes a project no. RCN/SP/0520/2021/1 financed from the state budged – Ministry of Education and Science Republic of Poland in the framework of a program “Development of scientific journals”. The financing amounts to 120,000 PLN. The program aims at improving the level of publishing and editing practices, increasing the impact of scientific journals on science development, and extending the international range of scientific journals.