Changes in Quality Characteristics and Antioxidant Activity of Bitter Melon (Momordica charantia L.) Pickle during Ageing

Abstract

Bitter melon (Momordica charantia L.) has various biological functions, including anti-diabetic, anti-cancer, anti-inflammatory, anti-viral, and antioxidant activities. However, the development of foods using bitter melon (BM) is unexplored due to its bitter taste. In this study, BM pickle was prepared, and changes in quality characteristics and antioxidant activity during ageing were determined. After 4 weeks of ageing, pH levels, salinities, soluble solids, and reducing sugars of BM pickle decreased, whereas acidities increased. In addition, total viable, lactic acid bacteria, and yeast viable cell numbers greatly increased until 1 week, after which they slightly decreased. Levels of soluble phenolics increased during ageing, antioxidant activity increased accordingly. Crude protein, K, and P contents of pickles were lower than in raw material of BM, whereas crude fat and Na contents increased. Corn silk extracts were added to BM pickle during ageing in order to improve the bitter taste and flavor. The best sensory quality was obtained by adding 0.25% corn silk extracts.Key words: bitter melon, pickle, ageing, antioxidant, phenolics

Total Polyphenol, Flavonoid Contents and Antioxidant Activities of Dolsan Leaf Mustard Pickle during Storage

“…(p<0.05). The antioxidant activity of bitter melon pickle increased only slightly during storage [7]. Similarly, there was no significant difference in the antioxidant activity during storage in the present study.…”

“…The potential antioxidant activity of food and medicinal plants is associated with phenolic contents, type, and structure [6]. Recently, extensive progress has been made in studying the antioxidant activity during the storage of pickles using tea leaves [1], garlic [6], bitter melon [7], and mountain herbs [8]; however, to the best of our knowledge, antioxidant activity during storage of Dolsan leaf mustard has not been researched. Hence, this study aims to examine the total phenolic and flavonoid contents and antioxidant activities of Dolsan leaf mustard pickles (DLMP) during storage.…”

Quality characteristics and antioxidant activities ofmakgeolli prepared using rice nuruk containing bitter melon (Momordica charantia)

“…여주(Momordica charantia)는 박과의 덩이식물로 bitter squash, bitter gourd, bitter melon, karela 및 goya로도 불리며 일반적으로 아시아, 동아프리카, 중앙아메리카 및 남아메 리카와 같은 열대지방에서 재배되며 당뇨의 민간요법 치료 제로써 널리 사용되고 있다 (11,12). 여주는 glycosides, triterpenes, polyphenols, saponins, alkaloids, proteins, K, Ca, Mg, Fe, Zn 등의 미네랄과 vitamin C, β-carotene을 다량 함유하고 있으며, 특히 미성숙과는 비타민C, 비타민A와 철의 주요 공급원이 되고 있다 (11)(12)(13)(14).…”