Tropical Fruits
Xuan Phong Huynh; Ngoc Thanh Nguyen; Minh Chau Luu; Thi Ngoc Bich Bui; Hoang Dang Long Bui; Bach Long Tran; Thi Kim Ngan Tran
Abstract
Purpose: King orange (Citrus reticulata × sinensis) is a fruit spices native to tropical and subtropical regions that holds significant economic and nutritional value and is widely consumed in daily life. The primary chemical constituents of king orange include flavonoids (such as hesperidin and ...
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Purpose: King orange (Citrus reticulata × sinensis) is a fruit spices native to tropical and subtropical regions that holds significant economic and nutritional value and is widely consumed in daily life. The primary chemical constituents of king orange include flavonoids (such as hesperidin and naringin), organic acids, vitamin C, and phenolic compounds. Due to its unique biological properties, nutritional benefits, and divers pharmacological effects, king orange is not only a widely consumed fruit but also a promising ingredient for developing natural functional foods, pharmaceuticals, and cosmetics. This study investigated the distribution of bioactive compounds and the antioxidant capacity in different tissues of king orange cultivated in four provinces of the Mekong Delta, Vietnam. Research Method: Physical characteristics of the fruit were analyzed, and phytochemical screening was performed identify secondary metabolites. Flavonoid and phenolic contents were quantified, and antioxidant activity was assessed using the DPPH assay. Findings: The fruits had thick, juicy flesh (42.4-51.2% w/w) and thin peel (27.2-35.2% w/w). Alkaloids, flavonoids, phenolics, and saponins were detected in both juice and peel extracts, while terpenoids were found only in the peel. The juice had the highest flavonoid and phenolic content, followed by flavedo and albedo extracts. Antioxidant activity was highest in the juice from "Can Tho" and in the peel extracts from "Vinh Long". Research limitations: No limitations were encountered. Originality/Value: Orange juice and peel are rich in bioactive compounds with antioxidant properties, highlighting their potential for health-promoting applications. Citrus reticulata is not only a widely consumed fruit but also a promising raw material for the development of natural functional food, pharmaceutical, and cosmetic products.
Medicinal Plants
Masoomeh Amerian; Mahmud Khoramivafa; Amir Palangi; Golamreza Gohari; Georgia Ntatsi
Abstract
Purpose: This research has investigated the effect of different levels of nitrogen and selenium on some growth and physiological characteristics of garlic leaves. Research method: This research was done as a factorial in the form of randomized complete blocks in 3 replications. The first factor included ...
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Purpose: This research has investigated the effect of different levels of nitrogen and selenium on some growth and physiological characteristics of garlic leaves. Research method: This research was done as a factorial in the form of randomized complete blocks in 3 replications. The first factor included four levels of nitrogen (0, 50, 100, and 150 kg ha-1) and the second factor included three levels of selenium (0, 5, and 10 mgL-1). Findings: In all four nitrogen levels, with increasing selenium concentration, plant height (69.66 cm), fresh weight (10.66 g m2), and dry weight (51.33 g m2) of leaf increased. The highest amount of photosynthetic pigments was observed in the treatment of 150 kg ha-1 of nitrogen along with 10 mg L-1 of sodium selenate. Nitrogen and selenium increased antioxidant capacity (45.69 μmol g-1FW), total phenol (295.60 mg 100 g-1FW) and ascorbic acid (18.30 mg 100 g-1FW). Contrary to selenium, nitrogen increased the amount of allicin in garlic leaf, and the highest amount of allicin (0.33 mgmL-1) was in the treatment of 150 kg ha-1 of nitrogen along with 0 mgL-1 of sodium selenate. The maximum plant height and wet and dry weight of the leaf were observed in the treatments of selenium and nitrogen, which shows the positive effect of both elements on increasing the amount of chlorophyll synthesis and, as a result increasing the amount of photosynthesis and carbon fixation, which ultimately will have, increasing the growth rate of garlic plant. Research limitations: None were found to report. Originality/Value: As a result, the treatment of 150 kg ha-1 of nitrogen along with 10 mgL-1 of sodium selenate is recommended to increase the antioxidant compounds of garlic leaf, which is a good source of these compounds and selenium in early spring, which also plays an essential role in human health.
