THE EFFECT OF HEATING METHOD AND FORMULATION ON MARMALADE QUALITY PRODUCED FROM ROSE HIP PULP

Some chemical properties of rose hip pulp obtained from a commercial firm were determined and processed to marmalade by using 40/60 and 45/55 pulp/sugar ratio under the atmospheric and vacuum conditions. Two level of citric acid were added into the samples. Measured properties of the pulp as follows: total dry matter 12.39 %, soluble dry matter 10.63 %, titration acidity 0.61 %, pH 3.54, ascorbic acid 1170.9 mg/100 g, total ash 0.72 %, HMF 0.29mg/100 g, total sugar 10.58 %, reducing sugar 5.24 % and sucrose 5.34 %. Also, in marmalade following values were obtained: total dry matter 70.38-71.97 %, soluble dry matter 67.69-69.10 %, titration acidity 0.55-0.73 %, pH 2.97-3.31, ascorbic acid 109.29-153.85 mg/100 g, total minerals 0.30-0.34 %, HMF 0.45-3.36 mg/100 g, total sugar 64.10-64.93 %, reducing sugar 5.18-6.97 % and sucrose 37.83-56.78 %. L, a and b colours values belong to marmalades were also determined. In the marmalades produced under vacuum condition, inversion was insufficient but low HMF and better protected ascorbic acid were determined

Physicochemical properties of Turkish green tea powder: efects of shooting period, shading, and clone

Tis study aimed to determine the physicochemical properties of the green tea powders produced from 2 diferent Turkish tea [ Camellia sinensis (L.) O.Kuntze] clones (Derepazarı 7 and Fener) grown under diferent shade levels and harvested during 2 consecutive shooting periods. Moisture, ash, crude fber, and total phenolic contents of the green tea powders were determined based on the experimental factors. Products were also evaluated for their water activity, bulk density, particle size, color, extraction yield, and antioxidant activity. Te shooting period, specifc to Turkish tea cultivation, showed remarkable efects on the main quality parameters of the green tea powders. It is noteworthy that the phenolic content and antioxidant activity of the products did not change signifcantly with treatments. Te green tea powder produced from Derepazarı 7 clone, grown under dark shade and harvested in the frst shooting period, was superior among the tested parameters