The Effect of Mixing Rind of Watermelon (Citrullus Lanatus) and Kweni Mango (Mangifera Odorata Griff.) on the Quality of Slice Jam

Authors

Lana Elisabeth Lalujan , Alya Cahyani Putri , Tineke Marlyn Langi , Teltje Koapaha

DOI:

10.29303/jppipa.v11i11.12052

Published:

2025-11-30

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Abstract

This study aimed to evaluate the effect of mixing watermelon rind (Citrullus lanatus) and kweni mango (Mangifera odorata Griff.) on the color and sensory quality of slice jam while promoting the utilization of fruit-processing by-products. The experiment employed a Completely Randomized Design (CRD) with four treatment ratios of watermelon rind to kweni mango pulp: P1 (20:80), P2 (30:70), P3 (40:60), and P4 (50:50), each replicated three times. Color parameters (L*, a*, b*) were measured using the Color Grab application, and sensory evaluation of color, aroma, taste, and texture was conducted by 25 untrained panelists using a seven-point hedonic scale. Results showed that increasing the proportion of watermelon rind significantly enhanced lightness (L*) and yellowness (b*) while decreasing redness (a*). The sensory test indicated that the P4 formulation achieved the highest overall preference score (5.12), corresponding to a bright golden-yellow color, balanced aroma, and chewy texture. The discussion highlights that the improvement in color and texture is associated with the higher natural pectin content of watermelon rind, which contributes to gel formation and product stability. Moreover, combining kweni mango and watermelon rind demonstrates a viable approach for valorizing agricultural waste into value-added food products. In conclusion, the 50:50 mixture produced the most acceptable slice jam, confirming that watermelon rind can serve as a sustainable, functional ingredient to enhance product quality and support circular-economy practices in tropical fruit processing

Keywords:

Color characteristics, Kweni mango, Sensory quality, Slice jam, Sustainable food innovation, Watermelon rind

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Author Biographies

Lana Elisabeth Lalujan, Universitas Sam Ratulangi

Study Program of Food Technology, Department of Agricultural Technology, Faculty of Agriculture, Universitas Sam Ratulangi, Manado, Indonesia.

Alya Cahyani Putri, Universitas Sam Ratulangi

Study Program of Food Technology, Department of Agricultural Technology, Faculty of Agriculture, Universitas Sam Ratulangi, Manado, Indonesia.

Tineke Marlyn Langi, Universitas Sam Ratulangi

Study Program of Food Technology, Department of Agricultural Technology, Faculty of Agriculture, Universitas Sam Ratulangi, Manado, Indonesia.

Teltje Koapaha, Universitas Sam Ratulangi

Study Program of Food Technology, Department of Agricultural Technology, Faculty of Agriculture, Universitas Sam Ratulangi, Manado, Indonesia.

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How to Cite

Lalujan, L. E., Putri, A. C., Langi, T. M., & Koapaha, T. (2025). The Effect of Mixing Rind of Watermelon (Citrullus Lanatus) and Kweni Mango (Mangifera Odorata Griff.) on the Quality of Slice Jam . Jurnal Penelitian Pendidikan IPA, 11(11), 26–34. https://doi.org/10.29303/jppipa.v11i11.12052