The effects of milk from different species (sheep/cow) and pH adjustment in the production of Requeijão cremoso, a kind of processed cheese, were investigated. The results showed that the sheep's Requeijão cremoso had higher pH (∼3%), lower yellowness index (∼11%), and lower brightness (∼12%) after 5 days of storage, and at least 40% lower hardness compared to the Requeijão made from cow milk. The pH adjustment did not change the visual appearance of the samples but affected their hardness in different ways, with an increase of up to 16% for the cheese from cow milk and a reduction of up to 39% for the cheese produced from sheep milk. The results suggested that the protein-protein interactions were favoured in the Requeijão cremoso from sheep milk, while a protein network with higher water holding capacity and increased hardness was observed for the samples from cow milk.
Belsito, P.C., Ferreira, M.V.S, Cappato, L.P., Cavalcanti, RN., Vidal, V.A.S., Pimentel, T.C., Esmerino, E.A., Balthazar, C.F., Neto, R.P.C., Tavares, M.I.B., Zacarchenco, P.B., Freitas, M.Q., Silva, M.C., Raices, R.S.L., Pastore, G.M., Pollonio, M.A.R., and Cruz, A.G. (2017). Manufacture of Requeijão cremoso processed cheese with galactooligosaccharide. Carbohydrate Polymers, 174: 869–875. https://doi.org/10.1016/j.carbpol.2017.07.021.
Bianchi, A.D., Mallmann, S., Gazoni, I., Cavalheiro, D., and Rigo, E. (2021). Effect of acid casein freezing on the industrial production of processed cheese. International Dairy Journal, 118: 105043 .https://doi.org/10.1016/j.idairyj.2021.105043.
Brasil. (1997). Portaria nº 359, de 4 de setembro de 1997. Aprova o regulamento técnico para fixação de identidade e qualidade do requeijão ou requesõn. Diário Oficial da União: Seção 1, Brasília, Distrito Federal, n. 172, p. 42–43. Available at: https://pesquisa.in.gov.br/imprensa/jsp/visualiza/index.jsp?data=08/09/1997&jornal=1&pagina=42&totalArquivos=160.
Dalmina, E.M., Malta, D.S., Silva, F.C., Tribst, A.A.L., Rigo, E., and Cavalheiro, D. (2022). Sodium reduction in “Requeijão cremoso” processed cheese made from fresh and refrigerated sheep milk. Journal of Food Processing and Preservation, 46(4): e16418. https://doi.org/10.1111/jfpp.16418.
Dalziel, J.E., Smolenski, G.A., McKenzie, C.M., Haines, S.R., and Day, L. (2018). Differential effects of sheep and cow skim milk before and after fermentation on gastrointestinal transit of solids in a rat model. Journal of Functional Foods, 47: 116–126. https://doi.org/10.1016/j.jff.2018.05.039.
Dias, R.S., Balthazar, C.F., Cavalcanti, R.N., Sobral, L.A., Rodrigues, J.F., Neto, R.P.C., Tavares, M.I.B., Ribeiro, A.P.B., Grimaldi, R., Sant'Anna, C., Esmerino, E.A., Pimentel, T.C., Silva, M.C., and Cruz, A.G. (2022). Nutritional, rheological and sensory properties of butter processed with different mixtures of cow and sheep milk cream. Food Bioscience, 46: 101564. https://doi.org/10.1016/j.fbio.2022.101564.
Fox, P.F., Guinee, T.P., Cogan, T.M., and McSweeney, P.L. (2017). Fundamentals of cheese science. Springer, Boston, p. 799.
Lee, S.K., Klostermeyer, H., and Anema, S.G. (2015). Effect of fat and protein-in-water concentrations on the properties of model processed cheese. International Dairy Journal, 50: 15–23 .https://doi.org/10.1016/j.idairyj.2015.06.001.
Malta, D.S., Dalmina. E.M., Schmeier, M.N., Seguenka, B., Steffens, J., Bianchi, A.E., Tribst, A.A.L., Cavalheiro, D., and Rigo, E. (2021). Impact of the preservation methods of sheep milk on the characteristics of Requeijão cremoso processed cheese. International Dairy Journal ,121: 105101. https://doi.org/10.1016/j.idairyj.2021.105101.
Ochoa-Flores, A.A., Hernández-Becerra, J.A., Velázquez-Martínez, J.R., Piña-Gutiérrez, J.M., Hernández-Castellano, L.E., Toro-Mujica, P., Chay-Canul, A.J., and Vargas-Bello-Pérez, E. (2021). Chemical and fatty acid composition of Manchego type and Panela cheeses manufactured from either hair sheep milk or cow milk. Journal of Dairy Science, 104(7): 7457–7465. https://doi.org/10.3168/jds.2020-19301.
Park, Y.W. (2007). Rheological characteristics of goat and sheep milk. Small Ruminant Research, 68(1–2): 73–87. https://doi.org/10.1016/j.smallrumres.2006.09.015.
Ramos, M. and Juarez, M. (2011). Sheep milk. In: Fuquay, J.W. (Ed.), Encyclopedia of dairy sciences, 2nd ed. Academic Press, London, vol. 2, pp. 494–502.
Ramos, I.M. and Poveda, J.M. (2022). Fermented sheep's milk enriched in gamma-amino butyric acid (GABA) by the addition of lactobacilli strains isolated from different food environments. LWT – Food Science and Technology, 163(15): 113581. https://doi.org/10.1016/j.lwt.2022.113581.
Silva, R., Rocha, R.S., Guimarães, J.T., Balthazar, C.F., Ramos, G.L.P.A., Scudino, H., Pimentel, T.C., Azevedo, E.M., Silva, M.C., Cavalcanti, R.N., Alvarenga, V.O., Duarte, M.C.K.H., Esmerino, E.A., Freitas, M.Q., and Cruz A.G. (2020). Ohmic heating technology in dulce de leche: physical and thermal profile, microstructure, and modeling of crystal size growth. Food and Bioproducts Processing, 124: 278–286. https://doi.org/10.1016/j.fbp.2020.09.001.
Tribst, A.A.L., Ribeiro, L.R., Leite Junior, B.R.C., Oliveira M.M., and Cristianini M. (2018). Fermentation profile and characteristics of yoghurt manufactured from frozen sheep milk. International Dairy Journal, 78: 36–45 .https://doi.org/10.1016/j.idairyj.2017.10.005.
Walter, L., Narayana, V.K., Fry, R., Logan, A., Tull, D., and Leury, B. (2020). Milk fat globule size development in the mammary epithelial cell: a potential role for ether phosphatidylethanolamine. Scientific Reports, 10: 12299. https://doi.org/10.1038/s41598-020-69036-5.
Zhong, Q. and Daubert, C.R. (2004). Kinetics of rennet casein gelation at different cooling rates. Journal of Colloid and Interface Science, 279: 88–94. https://doi.org/10.1016/j.jcis.2004.06.059.