Hedonic Price Model of Table Olive in Turkish Markets: a Case Study of Bursa Province

The overall appearance and size are the most effective factors for quality determination of olives. Moreover, quality classification and pricing of olives are done according to size namely the number of olive fruits per kilogram. The aim of this study was to designate the effects of some quality criteria: number of olive fruit/kg (188-363), width (14.23- 19.23 mm), height (18.23-24.17 mm), flesh/stone weight ratio (4.80-6.96) , total dry matter (41.27-47.19 %), total acidity as lactic acid (0.53-0.74 %), pH (5.10-5.29), total oil (21.70-26.77 %), fatty acid composition of raw table olives on price determination by hedonic model analysis. Statistical analysis of prices was done by using average retail prices of the samples. Lactic acid, flesh/stone weight ratio, total oil and linoleic acid factors had positive coefficients, so they positively affected the price. According to this model, main quality criteria affecting the price of olives were total acidity and flesh/stone weight ratio. Other factors did not significantly affect the table olive price. Especially the latter, since for the consumers, paying more would not only mean larger fruits but also a higher flesh ratio. Also, considering the factors having positive coefficients in price determination of table olives for both producers and consumers was important

Antioxidant Capacity and Physicochemical Characteristics of Carbonated Erica Arborea Tea Beverage

The current study was aimed to generate an innovative tea beverage which has water infusion of Erica arborea. Dehydrated Erica arborea leaves were extracted in boiling water and the solution was brix value-balanced to 8° with sucrose, acid, natural lemon flavor, and antimicrobial agents. Following the blending of additives, carbonation was applied. Besides some physicochemical parameters, total phenolics, bioaccessibility of total phenols, antioxidant capacity, and bioaccessible antioxidants with 2,2-diphenyl-1-picrylhydrazyl (DPPH), ferric reducing antioxidant power (FRAP) and cupric ion reducing antioxidant capacity assay (CUPRAC) methods were also investigated. The green- and yellow-tinted beverage was especially rich in potassium and calcium. The total phenolics and bioaccessible phenolics of the beverage were identified as 174.06 ± 24.53 mg Gallic Acid Equivalent (GAE) 100 mL−1 and 96.07 ± 3.96 mg GAE 100 mL−1, correspondingly. Antioxidant capacity was 27.20 ± 1.09 μmol trolox mL−1, and the bioaccessible antioxidant capacity was 0.17 ± 0.02 μmol trolox mL−1 in DPPH. Measured antioxidant capacity and bioaccessible antioxidant capacity with other assays were 22.41 ± 2.49 and 3.09 ± 0.44 μmol trolox mL−1 for FRAP; 21.09 ± 1.65 and 0.02 ± 0.00 μmol trolox mL−1 for CUPRAC. In addition to its nutritional and functional features, Erica arborea tea beverage is preferred in accordance with the panelists’ sensorial decision

Impact of different drying parameters on color, β-carotene, antioxidant activity and minerals of apricot (Prunus armeniacaL.)

Abstract Apricot is one of the fruits dried by using different methods, such as sun, convective or microwave drying. The effects of drying methods on the components of this fruit differ depending upon the temperature or time parameters. In this research, the impacts of convective, microwave and microwave–convective drying techniques on color, β-carotene, minerals and antioxidant activity of apricots were investigated. The color values (L*, b*,ΔEab, h° and C*ab) of dried fruit were decreased, while the a* values increased. Compared with a fresh sample, the dried apricots showed a 1.4-3.9-fold proportional increase in β-carotene based on the increment of dry matter. The samples dried at high temperature and microwave levels, at 75 °C+90 watt and 75 °C+160 watt, showed lower antioxidant activity. Of the different drying treatments, the microwave-convective method (50 °C+160 watt) obtained a higher β-carotene content while maintaining antioxidant activity with a short drying time

A study of fortification of lemonade with herbal extracts

Abstract The aim of the present work was to design new beverages using lemonade and some herbal extracts (linden, heather, green tea, lemon verbena, clove, peppermint, ginger and mate) rich in vitamin C and flavonoids. The linden-added lemonade showed the highest value (597.9 mg/kg) for ascorbic acid content, whereas the lemon verbena-added lemonade showed the lowest value (486.04 mg/kg). The amount of saccharose was changed by 11.07-11.58%, the glucose by 1.11-1.62% and the fructose between 11.07-11.58% in the beverages. K, Na, Mg and P values in the lemonades were determined in the range of 178.83-210.98 mg/kg, 33.75-39.13 mg/kg, 22.37-27.89 mg/kg and 7.22-10.04 mg/kg, respectively. The total phenolic content in the samples changed between 315.11-397.57 mg GAE/100 g. When the samples were analyzed for antioxidant activity, FRAP (17.13-26.79 µmol trolox/mL) and ABTS (16.91-25.38 µmol trolox/mL) methods gave higher results than the DPPH (14.88-17.72 µmol trolox/mL) method. Linden-, ginger- and peppermint-added lemonades, which had been found to be rich in total phenolic compounds and ascorbic acid, showed higher antioxidant activity than the control sample. Overall, the most preferred lemonades were heather- and ginger-added beverages and the control sample. Mate-added lemonade was the least preferred

Effects of long-term consumption of high fructose corn syrup containing peach nectar on body weight gain in sprague dawley rats

Abstract High fructose corn syrup (HFCS) is one of the most used sweeteners in the food industry. Health concerns regarding the consumption of HFCS-containing foods have developed in parallel with the increasing amount of people who become overweight. This study was conducted to investigate whether HFCS-containing peach nectar (pn-HFCS) consumption has more detrimental effects on anthropometrical and biochemical parameters compared with sucrose-containing peach nectar (pn-sucrose). Fifty-day-old Sprague Dawley rats were divided into three groups and were fed (A) pn-HFCS + ad libitum chow, (B) pn-sucrose + ad libitum chow and (C) only ad libitum chow for 7 months. The percentage change in body weight (PCBW), body mass index (BMI), and Lee index were calculated, and serum triglyceride, glucose, insulin and leptin concentrations were measured. The PCBW, BMI, Lee index, serum triglyceride, glucose, insulin and leptin concentrations were insignificant among the three groups. We can suggest that peach nectar consumption resulted in more energy intake than the control and since pn-HFCS group consumed more chow than the pn-sucrose group. The results show that long term daily HFCS or sucrose consumption in peach nectar is not associated with weight gain and does not stimulate metabolic changes in Sprague Dawley rats