Coconut (Cocos nucifera L.) sap as a potential source of sugar: Antioxidant and nutritional properties

Abstract

This study was carried out to compare the antioxidant and nutritional properties of coconut (Cocos nucifera L.) sap with other natural sources of sugar such as sugar palm (Borassus flabellifer) and sugarcane (Saccharum officinarum L.). Coconut sap and juice from sugar palm and sugarcane were analyzed for proximate composition, pH and total soluble solid (TSS), color, sugar profile, vitamin profile, antioxidant properties (total phenolic contents, DPPH, FRAP, and ABTS), and mineral content. The results indicated that coconut sap possesses high DPPH (23.42%), FRAP (2.09 mM/ml), and ABTS (21.85%) compared with the juices. Coconut sap also had high vitamin C (116.19 µg/ml) and ash (0.27%) contents, especially in potassium (960.87 mg/L) and sodium (183.21 mg/L) which also indicating high content of minerals. These properties showed that coconut sap could be served as a potential healthier sugar source compared with sugar palm and sugarcane juices.

Improved radical scavenging activity and stabilised colour of nipa palm syrup after ultrasound‐assisted glycation with glycine

“…Martins & Van Boekel (2005) reported the formation of glycine–glucose adduct during the Maillard reaction. Sucrose, glucose and fructose were the primary sugars found in nipa sap (Phetrit et al ., 2020) and coconut sap (Asghar et al ., 2020c) as well as in sugar palm and sugarcane juices (Asghar et al ., 2020c). Upon heating and ultrasonic treatment, the reaction between the reducing sugars (glucose and fructose) presented in the nipa syrup and added glycine can produce the intermediate and glycated end products.…”

Mineral composition of table sugars from the sap of the inflorescences of 03 coconut (Cocos Nucifera L.) cultivars in Ivory Coast

“…This mineral is also more represented in the raw material which is coconut sap with a higher content of 90.65 mg/100 mL according to the work of Okoma et al [6] Similarly, Asghar et al [7] found comparable amounts of potassium (96.08 mg/100mL) in the sap of coconut trees grown in Malaysia. Indeed, potassium is reported to be in high proportion in different parts of the coconut tree [8] .…”

Ribes himalense as potential source of natural bioactive compounds: Nutritional, phytochemical, and antioxidant properties

“…The results of DPPH and ABTS were expressed as trolox equivalent antioxidant capacity (TEAC), which is µmol TEAC/g fresh weight and determined via a calibration curve, such as y = 0.7072x − 0.0081, R 2 = 0.9977 and y = 0.7021x − 0.0012, R 2 = 0.9985. The antioxidant activity was conducted using ferric reducing antioxidant power (FRAP) assay method, that is, under acidic conditions, the ability of antioxidants to reduce Fe 3+ ‐TPTZ (2,4,6‐tripyridyl‐s‐triazine) to produce blue Fe 2+ ‐TPTZ (Asghar et al., 2019; Oikeh et al., 2016; Razak et al., 2015). The absorbance was measured at 593 nm, and the FRAP results were represented as Fe (II) equivalent antioxidant capacity, which is µmol Fe (II)/g fresh weight, and determined via a standard curve (y = 1.2416x + 0.0134, R 2 = 0.9996).…”