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  • Author or Editor: A.A. Hayaloglu x
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Beyaz peynir, Turkish white-brined cheese, was produced with six different strains of Lactococcus and ripened at 6–8 °C. Two of these were Lc. lactis subsp. lactis UC317 and NCDO763, while four of them were Lc. lactis subsp. cremoris SK11, HP, Wg2 and AM2. To determine their performance in manufacture of Beyaz cheesemaking, the activity of six different strains of Lactococcus were monitored during cheese production by determining the curd acidity. Also, their proteolytic and lipolytic activities were tested by determining nitrogen fractions and free fatty acid contents, respectively, after 3 days of ripening. These cheeses made with each strain of Lactococcus did not differ significantly in pH decline during cheesemaking. The gross compositions of the fresh cheeses were found to be similar; however, the cheeses made with HP and Wg2 had the lowest and highest levels of salt-in-moisture content, respectively. Water-soluble nitrogen, 12% trichloroacetic acid soluble nitrogen, total free amino acid and total free fatty acid contents were significantly influenced by using different strains of lactococci in manufacture of Beyaz peynir. All strains, except for Wg2 and AM2, gave a satisfactory result in chemical quality of the cheese; however, some differences were observed.

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Abstract

In this work, production of purple basil (Ocimum basilicum L.) herbal tea was studied. Purple basil is a medicinal and aromatic herb with many health benefits; it is commonly used for seasoning foods. Semi-shade and tray drying methods were used for drying purple basil for tea production. Physical, chemical, and sensory characteristics of samples were evaluated. Total polyphenol contents of samples increased with drying processes and were between 9.55 and 14.18 mg GAE/g. Colour values decreased with drying. Volatile composition of samples was determined using the SPME/GC-MS system. 2-Propenoic acid, 1,8-cineole (eucalyptol), and eugenol were the predominant volatile compounds in all samples. In sensory evaluation, samples produced by tray drying with added citric acid had the highest general acceptance. In conclusion, purple basil was evaluated as a suitable plant for herbal tea production due to its easy preparation, pleasant flavour and colour.

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