title: Optimization of fermentation conditions for production of the jabuticaba (Myrciaria cauliflora) spirit using the response surface methodology.
abstract: The jabuticaba tree (Brazilian grape tree) is a tree native to Brazil that belongs to the Myrtaceae family. The jabuticaba fruit is used in some regions of Brazil to produce juices, jams, wine, and ice cream. In this work, the fermentation conditions (temperature and °Brix) for producing jabuticaba distillate were optimized using the response surface methodology (RSM). The optimal conditions for fermentation were found to be 20 °C and 22 °Brix. In repeated experiments to validate the model, experimental data exhibited good agreement with the predicted data. The distillate jabuticaba beverage showed a peculiar chemical composition with 20 volatile compounds that were identified and quantified. Isoamyl alcohols (2-methyl-1-butanol + 3-methyl-1-butanol) were the most abundant volatile compounds identified in jabuticaba spirit. Sensory analysis by tasters showed overall approval of jabuticaba distillate. In principal component analysis, when the beverage was evaluated by panelists under 24 y old tended to give favorable ratings of aroma and taste, as well as high overall scores. The group of panelists between the ages of 25 and 53 y old generally gave high marks for appearance in the principal component analysis.
  
  
  CONCLUSIONS
  This study describes the study of fermentation conditions of jabuticaba pulp for production of jabuticaba spirit. Based on the results of this work, the proposed method can be an alternative for the use of the jabuticaba fruit, and may provide a new industrial outlet for this fruit.
authors.affiliation: Dept. of Biology, Federal Univ. of Lavras-UFLA, CP 3037-Campus Universitário, CEP 37.200-000 Lavras, MG, Brazil.
authors.forename: Whasley Ferreira
authors.initials: WF
authors.lastname: Duarte
authors.forename: Juliana Cunha
authors.initials: JC
authors.lastname: Amorim
authors.forename: Lilian de Assis
authors.initials: Lde A
authors.lastname: Lago
authors.forename: Disney Ribeiro
authors.initials: DR
authors.lastname: Dias
authors.forename: Rosane Freitas
authors.initials: RF
authors.lastname: Schwan
mesh_terms: D000434:Alcoholic Beverages / Q000032:analysis* / Q000382:microbiology; D001938:Brazil; D055598:Chemical Phenomena; D002851:Chromatography, High Pressure Liquid; D005285:Fermentation; D005511:Food Handling / Q000379:methods*; D005638:Fruit / Q000737:chemistry; D027822:Myrtaceae / Q000737:chemistry*; D000439:Pentanols / Q000032:analysis; D012441:Saccharomyces cerevisiae / Q000378:metabolism; D013649:Taste; D055549:Volatile Organic Compounds / Q000032:analysis
chemical_list: D000439:Pentanols; D055549:Volatile Organic Compounds; C029683:isopentyl alcohol