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Your search keyword '"Martins, António P L"' showing total 13 results
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13 results on '"Martins, António P L"'

2. Towards the Development of an Autochthonous Starter Culture

Author

Araújo-Rodrigues, Helena, Martins, António P. L., Tavaria, Freni K., Dias, João, Santos, Maria Teresa, Alvarenga, Nuno, Pintado, Manuela E., and GeoBioTec - Geobiociências, Geoengenharias e Geotecnologias

Subjects
proteolysis, autochthonous starter culture, Lactic acid bacteria, lipolysis, Serpa PDO cheese, cheese models, Plant Science, Microbiology, Health Professions (miscellaneous), Food Science, Health(social science)
Abstract

Funding Information: The present research work was financed by the national funds through the ministry of Agriculture and Rural Development and co-financed by the European Agricultural Fund for Rural Development (EAFRD), through the partnership agreement Portugal2020—PDR, under the project PDR2020-101-031020/17/18: SerpaFlora—Valorização da flora autóctone do queijo Serpa. The authors would also like to acknowledge the scientific collaboration of CBQF under the FCT—Fundação para a Ciência e a Tecnologia through project UIDB/50016/2020. In addition, this work also received funding support from national funds from Fundação para a Ciência e a Tecnologia, I.P. (FCT), Portugal, through the research unit UIDB/04035/2020 (GeoBioTec). H. Araújo-Rodrigues gratefully acknowledges FCT for the PhD individual research grant (ref. 2020.05798.BD). Publisher Copyright: © 2023 by the authors. Serpa is a protected designation of origin (PDO) cheese produced with raw ewes’ milk and coagulated with Cynara cardunculus. Legislation does not allow for milk pasteurization and starter culture inoculation. Although natural Serpa’s rich microbiota allows for the development of a unique organoleptic profile, it also suggests high heterogeneity. This raises issues in the final sensory and safety properties, leading to several losses in the sector. A possible solution to overcoming these issues is the development of an autochthonous starter culture. In the present work, some Serpa cheese Lactic acid bacteria (LAB)-isolated microorganisms, previously selected based on their safety, technological and protective performance, were tested in laboratory-scale cheeses. Their acidification, proteolysis (protein and peptide profile, nitrogen fractions, free amino acids (FAA)), and volatiles generation (volatile fatty acids (VFA) and esters) potential was investigated. Significant differences were found in all parameters analyzed, showing a considerable strain effect. Successive statistical analyses were performed to compare cheese models and Serpa PDO cheese. The strains L. plantarum PL1 and PL2 and the PL1 and L. paracasei PC mix were selected as the most promising, resulting in a closer lipolytic and proteolytic profile of Serpa PDO cheese. In future work, these inocula will be produced at a pilot scale and tested at the cheese level to validate their application. publishersversion published

Published
2023

13. Replacing cereals with dehydrated citrus pulp in a soybean oil supplemented diet increases vaccenic and rumenic acids in ewe milk.

Author

Santos-Silva, José, Dentinho, Maria T., Francisco, Alexandra, Portugal, Ana P., Belo, Ana T., Martins, António P. L., Alves, Susana P., and Bessa, Rui J. B.

Subjects
*EWES, *DAIRY cattle, *DRIED citrus pulp, *FATTY acid content of milk, *SOY oil
Abstract

This study evaluates the effect of the replacement of cereals by dried citrus pulp (DCP) in diets supplemented with 5% of soybean oil, on ewe milk yield and composition, including milk fatty acid (FA). Four Serra da Estrela multiparous ewes in the second month of lactation were used in a double 2 x 2 Latin square design. Ewes were individually penned and milked twice a day with an 8-h interval. Each experimental period included 14 d of diet adaptation followed by 5 d of measurements and sampling. The 2 diets included on dry matter basis 450 g/kg of corn silage and 550 g/kg of either a soybean oil-supplemented concentrate meal containing barley and maize (cereal) or dried citrus pulp (DCP; citrus). Feed was offered ad libitum, considering 10% of orts, and intake was measured daily. Milk yield was higher and dry matter intake tended to be higher with the citrus diet. Milk composition and technological properties for cheese production were not affected by treatments, except for lactose, which was lower with the citrus diet. Replacement of cereals by DCP resulted in a 3-percentage-point decrease of both 18:0 and cis-9-18:1 that were mostly compensated by the 4.19- and 1.68-percentage-point increases of trans-11-18:1 and cis-9,trans-11-18:2, respectively. The intake of C18 FA tended to increase with the citrus diet compared with the cereal diet, but the apparent transfer of 18:2n-6 and of 18:3n-3 did not differ between diets. The milk output of C18 FA increased with the citrus compared with the cereal diet, mostly due to the increase of trans-11-18:1 and cis-9,trans-11-18:2 because the daily milk output of 18:0, trans-10-18:1, cis-9-18:1, 18:2n-6 and 18:3n-3 did not differ between diets. Replacing cereals with DCP in an oil-supplemented diet resulted in a selective increase of trans-11-18:1 and cis-9,trans-11-18:2 in milk, with no major effect on other biohydrogenation intermediates. [ABSTRACT FROM AUTHOR]

Published
2016
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