title: Calcium lactate effect on the shelf life of osmotically dehydrated guavas.
abstract: The effect of calcium lactate on osmodehydrated guavas in sucrose and maltose solutions was monitored during storage under passive modified atmosphere for 24 d at 5 °C. Sample texture and color characteristics, microbial spoilage, sensory acceptance, structural changes, and gas composition inside the packages were periodically evaluated. Calcium lactate inhibited microbial growth on guavas, with yeast and mold counts in the order of 10(2) CFU/g throughout storage. The calcium salt reduced respiration rate of guava products, showing O(2) and CO(2) concentrations around 18% and 3% inside the packages. A firming effect on fruit texture, with up to 5 and 2 times higher stress and strain at failure values and tissue structure preservation could also be attributed to calcium lactate use. However, fruits treated with calcium lactate, osmodehydrated in maltose and sucrose solutions, showed sensory acceptance scores below the acceptability limit (4.5) after 13 and 17 d of storage, respectively.
authors.affiliation: Dept. of Food Engineering, Faculty of Food Engineering, State Univ. of Campinas, P.O. Box 6121, CEP 13083-862, Campinas, SP, Brazil. leilamprodrigues@gmail.com
authors.forename: Leila M
authors.initials: LM
authors.lastname: Pereira
authors.forename: Sandra M
authors.initials: SM
authors.lastname: Carmello-Guerreiro
authors.forename: Valéria C A
authors.initials: VC
authors.lastname: Junqueira
authors.forename: Cristhiane C
authors.initials: CC
authors.lastname: Ferrari
authors.forename: Miriam D
authors.initials: MD
authors.lastname: Hubinger
mesh_terms: D000890:Anti-Infective Agents / Q000494:pharmacology*; D017610:Calcium Compounds / Q000494:pharmacology*; D002245:Carbon Dioxide / Q000032:analysis; D015169:Colony Count, Microbial; D005506:Food Contamination / Q000032:analysis; D005516:Food Microbiology; D018857:Food Packaging; D005519:Food Preservation; D005638:Fruit / Q000187:drug effects* / Q000382:microbiology; D006863:Hydrogen-Ion Concentration; D007773:Lactates / Q000494:pharmacology*; D010100:Oxygen / Q000032:analysis; D010858:Pigmentation / Q000187:drug effects; D031647:Psidium / Q000187:drug effects* / Q000382:microbiology; D012475:Salmonella / Q000254:growth & development / Q000472:pathogenicity
chemical_list: D000890:Anti-Infective Agents; D017610:Calcium Compounds; D007773:Lactates; D002245:Carbon Dioxide; C110051:calcium lactate; D010100:Oxygen