Introduction. Detarium senegalense J.F. Gmel isa forest tree found in Senegal whose fruits are locally called ditax in Wolof. It is eatenfresh but it is widely used as nectar, which is one of the most popular beverages inSenegal. However, the chemical characterization of ditax pulp remains incomplete. Thispaper describes the volatile compounds of ditax to assess its organoleptic qualities.Materials and methods. Free volatile compounds of fresh ditax pulp wereisolated by solvent-assisted flavor evaporation and analysis by GC-MS. Results anddiscussion. Among the 53 compounds tentatively identified, 49 are reported forthe first time in this fruit. In total, 17 aldehydes, 11 aliphatic alcohols, 1 terpenealcohol, 7 free fatty acids, 3 unsaturated hydrocarbons, 1 terpene hydrocarbon, 7sesquiterpene hydrocarbons, 1 phenol, 2 ketones, 2 esters and 1 organic acid compound weretentatively identified in ditax fresh pulp. The main volatiles identified in fresh ditaxpulp were trans, cis-2,6-nonadienal (2.47 mg×kg–1),cis-2-heptenal (1.93 mg×kg–1), trans-a-bergamotene(1.11 mg×kg–1), bicyclo [2,2,0] hexane-1-carboxaldehyde (0.80 mg×kg–1), butyloctadecanoate (0.55 mg×kg–1) and trans-2-nonenal (0.47 mg×kg–1 freshpulp). Conclusion. Among the volatile compounds identified, aldehydecompounds were widely predominant. To assess the aromatic qualities of ditax pulp, theprimary impact aromas should be determined by identifying the aroma-active compounds byGC-olfactometry.

Introduction. The aims of our study were to evaluate the genetic diversityin flavor attributes of and preferences for fresh pomegranate arils. Materials andmethods. Experiments were conducted with fresh arils extracted from 18 distinctpomegranate varieties within the Israel Pomegranate Breeding Collection of the ARO.Consumer flavor acceptance tests were conducted at a commercial supermarket branch, anddescriptive flavor analysis tests were conducted by a trained sensory panel. Resultsand discussion. Consumer flavor acceptance tests revealed wide diversity in theflavor preferences for various pomegranate varieties. Further descriptive flavor analysistests revealed that arils from highly preferred varieties were characterized by highsweetness, moderate to low acidity levels, rich red wine and pomegranate fruity odors, lowbitterness and astringency, and soft seeds. In contrast, arils from the least preferredvarieties were either too sour or bitter, had low red wine and pomegranate fruity odors,or had very hard seeds. Furthermore, all “sour” varieties tested (acid content ≥ 1.8%)received low sensory preference scores, whereas “sweet-sour” and “sweet” varieties (acidcontents 0.7–1.8% and £ 0.7%, respectively) achieved variable flavor preference scores.Overall, it is suggested that pomegranate flavor preference derives mainly from highsweetness, low to moderate acidity, rich red wine and pomegranate fruity odors, and softseeds.

Introduction. The aim of this work was to develop a list ofsuitable sensory attributes and to perform sensory quality assessment of an unprocessedpeach juice and a peach juice clarified by enzymatic treatment followed by membraneprocesses, using the attributes chosen by the trained panel. Materials andmethods. A panel of assessors was selected and trained following the quantitativedescriptive analysis methodology. A descriptive terminology with eight descriptors wassuccessfully developed. Results and discussion. The sensory analysis showedthat the juices were effectively clarified. Although the clarification by microfiltrationin a bench-scale unit did not change juice taste attributes, the characteristic color andaroma of peach juice were also removed. The scale-up of the membrane clarification processaffected all the sensory characteristics of the clarified juice, even taste. Theunpleasant cooked fruit taste and aroma could be reduced by juice clarification byenzymatic and membrane processes. The kind of membrane, membrane geometry andtransmembrane pressure used in the membrane clarification did not significantly affect thejuice sensory characteristics.

Introduction. Natural beveragesface strong competition from synthetic drinks in the open market.Creation of diversity in natural products is a key strategy to withstandthis competition. Pummelo (Citrus grandis Linn.)is one such potential fruit which could be exploited on a commercialscale if processed properly. The bitterness of pummelo juice isa serious handicap in its utilization. The present study aimed atpreparation of a cost-effective, palatable blended beverage of pummelo. Materials and methods. To overcome this problem, pummelowas blended with mango ginger and kokum juice in the ratio of [65:30:5]for the preparation of syrup. The product was stored for 120 daysin ambient conditions of storage and analyzed for changes in itsphysicochemical constituents. Results and discussion.Total soluble solids and total sugar increased during storage, whiletitratable acidity and ascorbic acid content decreased slightlyduring storage. Organoleptically, the best recipe was 25% juice,70 °Brix total soluble solids and 1.5% acidity with a score of 6.3out of 7.0 for overall acceptability. Mango ginger juice suppressedthe bitter aftertaste of pummelo juice and imparted its characteristictaste and flavor to the product. The product was shelf-stable andhad important medicinal constituents in it. The [total revenue / totalcost] ratio of the product was 2.90.

Introduction. The aim of our study was to evaluate the effects of sugar and citric, malic, succinic and ascorbic acid levels on melon flavor perception, and to infer about consumers’ preferences based on instrumentally measured characteristics. Materials and methods. Fully ripened melons belonging to the ‘Branco’ (Brazilian), ‘Pele de Sapo’ (Spanish) and winter ‘Tendral’ (Portuguese) melon cultivars were analyzed using five fruits with three replicates for each treatment. Quality parameters (weight, height, diameter, solid shape, volume, internal appearance, texture and flavor), sugars (glucose, fructose and sucrose), total soluble solids content, sweetness, organic acids (citric, malic, succinic and ascorbic) and sourness were measured. Results and discussion. Flavor was the most important parameter for the consumers’ decision, regarding the different melon cultivars studied. It was also detected that it correlated well with sweetness (thus, with sucrose content) and sourness. The obtained data supports that sugars and organic acids enhance human perception of specific flavor notes in melon.