title: Effect of Aqueous Extract of the Seaweed Gracilaria domingensis on the Physicochemical, Microbiological, and Textural Features of Fermented Milks.
abstract: The effects of the Gracilaria domingensis seaweed aqueous extract in comparison with gelatin on the physicochemical, microbial, and textural characteristics of fermented milks processed with the mixed culture SAB 440 A, composed of Streptococcus thermophilus, Lactobacillus acidophilus, and Bifidobacterium animalis ssp. lactis, were investigated. The addition of G. domingensis aqueous extract did not affect pH, titratable acidity, and microbial viability of fermented milks when compared with the control (with no texture modifier) and the products with added gelatin. Fermented milk with added the seaweed aqueous extract showed firmness, consistency, cohesiveness, and viscosity index at least 10% higher than those observed for the control product (P < 0.05). At 4 h of fermentation, the fermented milks with only G. domingensis extract showed a texture comparable to that observed for products containing only gelatin. At 5 h of fermentation, firmness and consistency increased significantly (P < 0.05) in products with only seaweed extract added, a behavior not observed in products with the full amount of gelatin, probably due to the differences between the interactions of these ingredients with casein during the development of the gel network throughout the acidification of milk. The G. domingensis aqueous extract appears as a promising gelatin alternative to be used as texture modifier in fermented milks and related dairy products.
authors.affiliation: Keizo Asami Laboratory of Immunopathology, Federal Univ. of Pernambuco, Av. Prof. Moraes Rego, 1235, 50670-901, Recife, PE, Brazil.
authors.forename: Adriana Carneiro
authors.initials: AC
authors.lastname: Tavares Estevam
authors.affiliation: Dept. of Pharmacy, Center of Biological and Health Sciences, State Univ. of Paraíba, R. Juvêncio Arruda, s/n, 58429-600, Campina Grande, PB, Brazil.
authors.forename: Flávia Carolina
authors.initials: FC
authors.lastname: Alonso Buriti
authors.affiliation: Dept. of Statistics, Center of Sciences and Technology, State Univ. of Paraíba, R. Juvêncio Arruda, s/n, 58109-790, Campina Grande, PB, Brazil.
authors.forename: Tiago Almeida
authors.initials: TA
authors.lastname: de Oliveira
authors.affiliation: Dept. of Chemistry, Center of Sciences and Technology, State Univ. of Paraíba, R. Juvêncio Arruda, s/n, 58109-790, Campina Grande, PB, Brazil.
authors.forename: Elainy Virginia Dos Santos
authors.initials: EV
authors.lastname: Pereira
authors.affiliation: Dept. of Chemistry, Center of Sciences and Technology, State Univ. of Paraíba, R. Juvêncio Arruda, s/n, 58109-790, Campina Grande, PB, Brazil.
authors.forename: Eliane Rolim
authors.initials: ER
authors.lastname: Florentino
authors.affiliation: Keizo Asami Laboratory of Immunopathology, Federal Univ. of Pernambuco, Av. Prof. Moraes Rego, 1235, 50670-901, Recife, PE, Brazil.|Dept. of Morphology and Animal Physiology, Federal Rural Univ. of Pernambuco, Av. Dom Manoel de Medeiros s/n, 52171-900, Recife, PE, Brazil.
authors.forename: Ana Lúcia Figueiredo
authors.initials: AL
authors.lastname: Porto
mesh_terms: D000818:Animals; D001644:Bifidobacterium / Q000254:growth & development; D019149:Bioreactors; D002364:Caseins / Q000737:chemistry; D043302:Cultured Milk Products / Q000737:chemistry / Q000382:microbiology; D005285:Fermentation; D005511:Food Handling / Q000379:methods*; D005780:Gelatin; D005782:Gels; D044724:Gracilaria; D006244:Hardness; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007779:Lactobacillus acidophilus / Q000254:growth & development; D050296:Microbial Viability; D008892:Milk / Q000382:microbiology; D010936:Plant Extracts / Q000737:chemistry; D019936:Probiotics; D012624:Seaweed; D048249:Streptococcus thermophilus / Q000254:growth & development; D014783:Viscosity
chemical_list: D002364:Caseins; D005782:Gels; D010936:Plant Extracts; D005780:Gelatin
keywords: back extrusion test; dairy foods; fermentation; gelatin substitute; gracilariaceae