OBJECTIVES To measure, in vitro, the pH and titratable acidity (TA) of various soft drinks and to assess the erosive effect of smoothies using an in situ model. METHOD The in vitro phase of this study included measuring the inherent pH of six different commercially available smoothies, diet coke, and citric acid 0.3% (positive control) using a pH meter. The TA was determined by titration with...

Pectin methylesterase (PME) rapidly hydrolyzes pectin methylesters in cold break tomato juice to form methanol and to increase titratable acidity (TA). Within 30 min, the juice methanol concentration increased from 35 to over 400 lg g 1 while the pH dropped from 4.45 to 4.20. On average, cold break juice pH values were 0.21 U lower and TAs 12.4 leq g 1 higher than those for hot break juices pre...

Jujube (Ziziphus jujuba Mill.) fruit is an important medicinal plant in Iran. The harvesting time is a crucial for jujube fruit quality. Several characteristics of jujube fruit when harvested at four development stages; white mature (light green), crisp mature (white-red), fully mature (red) and fully ripe (dehydrated brown) were evaluated. Fruit weight, diameter, volume, pulp to stone ratio, f...

in this study the effects of plant growth regulators including; ga3 (0 and 50 mg/l) and ethephon (0 and 500 mg/l) were studied on the quality properties of two grape cultivars (perlette and yaghuti). at the harvest time, some physicochemical characteristics such as fruit cluster weight, fruit diameter, length, volume and l/d ratio, flesh firmness, fresh weight, ta, ph, tss and fruit color were ...

Probiotic beverages made from cereals become interesting in the recent food industries. In this contribution, a fermented teff-based probiotic beverage was produced using whole grain teff flour and co-culture strains of Lactiplantibacillus plantarum (LPA6) Lacticaseibacillus rhamnosus GG (LCGG). Then, effect 25 days refrigerated storage on cell viability (LPA6 LCGG), contents sugars, organic ac...

Given the scarcity of research related to interference climatic elements under qualitative characteristics cashew apples, this work had objective evaluating quality and total antioxidant activity apple dwarf in different conditions. The experimental design was completely randomized, a factorial scheme with repeated measurement time, three clones (CCP 09, BRS 265 PRO 555-1) two regions, cearense...

effects of pre-storage application of salicylic acid (sa) and storage periods were investigated on phenylalanine ammonia lyase (pal) activity, chilling index (ci) and quality of pomegranate (punica granatum) cv. malase saveh. the results showed that with increase in sa concentration up to 2mm, ci and ion leakage (il) were reduced while pal activity being increased. the lower il and ci vc the hi...

This study examined the effect of locule position and thawing duration on physicochemical nutritional characteristics intact cryo-frozen Musang King durian fruit. Cryo-frozen that had 5 locules was thawed for 2 18 hr, fruitlets each were analysed colour (L*, a*, b*, C*, h), firmness, soluble solids concentration (SSC), titratable acidity (TA), pH, ascorbic acid (AA), total phenolic content, fl...

In this study, the effectiveness of chitosan coating treatment to control weight loss and maintaining fruit quality of apricot was investigated. Fruits were coated with 0.25%, 0.5% and 0.75% chitosan as well as distilled water (control). Following treatments, fruits were stored at 0?C and 80 ? 2% relative humidity for 25 days. The weight loss, total soluble solids (TSS), titratable acidity (TA)...

Passionfruit (Passiflora edulis, Sims, cultivar "Sweetheart") were subject to gamma irradiation at levels suitable for phytosanitary purposes (0, 150, 400 and 1000 Gy) then stored at 8 °C and assessed for fruit quality and total ascorbic acid concentration after one and fourteen days. Irradiation at any dose (≤1000 Gy) did not affect passionfruit quality (overall fruit quality, colour, firmness...