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Showing 2 results for Rahmanzadeh Ishkeh


Volume 16, Issue 86 (4-2019)
Abstract

Recently, due to healthier and nutritional problems of synthetic antioxidants in food processing, using of herbal medicine and its effective components as a natural resources with antioxidant properties have been evaluated. This study was accomplished in order to examine phytochemical and antioxidant capacity of different small fruits in 15 accessions (Physalis, Solanum luteum, Raspberry, Hawthron, Barberry, Rose and Elderberry). After species identification, extraction of samples was conducted using ultrasonic device. Total phenolic content, total flavonoid content, total carotenoid and chlorophyll and Antioxidant capacity were determined by using Folin–Ciocalteu assays, aluminum chloride method, Lichtentaler method, DPPH respectively. The results showed that significant difference (p≤ 0.01) among small fruits phytochemical properties. Total phenolic content was in its highest value (5.096 mg GAE/g FW) in the genotype of G3 (Rubus ulmifolius sub sp. sanctus), whereas the lowest level (0.315 mg GAE/g FW) was found in the genotype of G1 (Physalis alkekengi). Total flavonoid content was in its highest value (14.433 mg /100g FW) in the genotype of G3 (Rubus ulmifolius sub sp. sanctus), whereas the lowest level (0.8 mg /100g FW) was found in the genotype of G1 (Physalis alkekengi). The highest level of total carotenoid content (20.508 μg/g FW) was found in G13 (sambucus nigra marginata). The highest level of antioxidant capacity in DPPH assays (Rubus ulmifolius sub sp. sanctus) were found in G3 (86.634 %). These results showed that different small fruits especially Rubus promising sources of natural antioxidants and other bioactive compounds beneficial to be used in the food or the pharmaceutical industries.

Volume 19, Issue 122 (April 2022)
Abstract

Abstract:
One of the valuable and rich sources of antioxidant compounds and vitamins is grape fruit. Nowadays, the production of high quality grapes with strong texture and high shelf life of fruits is very important. Therefore, the use of organic acids to improve the quality and quantity of crops and orchards is becoming more common. Humic acid, as an organic acid derived from humus and other natural sources, can work without damaging the environmental effects to enhance the quality of grapes. This study was conducted in a randomized complete block design with 4 replications. The experiment treatment consisted of four concentrations of humic acid (0, 0.5, 1 and 2 g L-1). Attributes such as weight, length and width of berry and grape panicle, as well as acidity, organic acids, soluble solids as well as some phytochemical traits such as total phenol and flavonoid, anthocyanin and antioxidant activity were evaluated by DPPH method. According to the results of analysis of variance, traits such as weight and width of berry and panicle, total phenol and antioxidant activity, acidity and soluble solids at 1% probability level were statistically significant between treated and control samples. But traits such as total flavonoid content and anthocyanin content of samples had significantly different at 5% probability level. In general, most of the traits had the highest values in the 2 g L-1 humic acid treatment. The highest total phenol content and antioxidant activity were observed in 2 and 1 g L-1 humic acid treatments with 1.667 mg ml-1 juice and 33.84%, respectively. In general, the results showed that application of humic acid can be improved many of the physical and biochemical properties of grape fruit.


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