International Conference on Earth & Environmental Science and Technology Poster ID: ICBE-P-006 A Blue Economy Issue: Seaweed (Hypnea musciformis) Versus Freshwater Weed (Ipomoea aquatica): A Comparative Analysis on the Basis of Proximate Composition and Antioxidant Properties Saad Al-din Sifat a , Mohammad Afzal Hossain a , Md. Solaiman Hossain b a Dept. of Food Engineering and Tea Technology, Shahjalal University of Science and Technology, Sylhet-3114, Bangladesh b Dept. of Oceanography, Shahjalal University of Science and Technology, Sylhet-3114, Bangladesh Scan QR code to download this Poster Now!! Shahjalal University of Science and Technology , Sylhet-3114, Bangladesh 15.953 0.282 37.464 25.154 22.56 6.01 0.24 16.63 27.597 12.65 0 5 10 15 20 25 30 35 40 Percentage (%) Proximate Compositions Hypnea musiformis Ipomoea aquatica 19.9 72.86 14.09 15.9 0 20 40 60 80 TAC(%) DPPH(%) Percentage (%) Total Antioxidant capacity and DPPH Hypnea musiformis Ipomoea aquatica 11.37 9.4 0 2 4 6 8 10 12 Hypnea musiformis Ipomoea aquatica (mg GA/g) Phenolics Content 31.59 51.52 0 10 20 30 40 50 60 Hypnea musiformis Ipomoea aquatica (mg/g) Carotenoids Fig. The sampling area of Cox’s Bazar, Bangladesh Study Area Ash Moist ure Protein Lipid Carbo hydrat e Refer ences Cox’s Bazar 22.56±0 .497 25.154 ±0.91 15.953± 1.27 0.282 ±0.05 37.464± 1.02 This Study Saint Martin 24.31±0 .5 9.76 ± 1.4 13.73±0. 8 0.34± 0.4 46.26±0 .6 (Khan et al.) Persia Gulf of Iran 21.8±0. 69 10.8±0 .35 16.5±2.7 8 2.8±0 .67 31.8±1. 34 (Roha ni- Ghadi kolaei et al., 2012) Saint Martin 18.65 12.35 16.31 1.56 22.89 (Siddi que et al., 2013) Table 1. Seaweed proximate compositions of other reports with this study. Seaweed is verily more compatible than freshwater weed in perspective of numbers of parameters. One can gain much more nutrition by consuming exact same amount of seaweed in contrast to freshwater weed. Intro Macro-algae or “seaweeds” are multicellular plants that are found in the coastal sea areas. They belong to the lower plants, meaning that they do not have roots, stems, and leaves. Instead they are composed of a leaf-like thallus and sometimes a stem and a foot called holdfast. Seaweeds have been an important dietary component since, at fourth century in Japan and at sixth century in China. In Korea also the consumption of seaweeds is a common practice (1). Based on their pigmentation seaweeds were classified into Chlorophyta (green algae), Rhodophyta (Red algae) and Phaeophyta (Brown algae). Fig. Common green, red and brown seaweed species(from left to right) Water spinach (Ipomoea aquatica), a freshwater weed which originated in China and is a commonly grown and consumed leafy green vegetable in China and other Asian countries in summer and autumn, is a rich source of carotenoids with many health benefits. Ipomoea aquatica is an important aquatic vegetable in southern Asia, India, and southern China. It is a herbaceous perennial plant belonging to the family Convolvulaceae. References 1) Gates, K.W. (2009), Marine Products for Healthcare: Functional and Bioactive Nutraceutical Compounds from the Ocean, Vazhiyil Venugopal: Functional Foods and Nutraceuticals Series. Boca Raton, FL, USA. CRC Press Taylor and Francis Group. 527 pages. $169.95. 2010,Taylor & Francis. 2) Prieto, P., Pineda, M., & Aguilar, M. (1999). Spectrophotometric quantitation of antioxidant capacity through the formation of a phosphomolybdenum complex: specific application to the determination of vitamin E. Analytical biochemistry, 269(2), 337-341. 3) Yen, G.-C., & Chen, H.-Y. (1995). Antioxidant activity of various tea extracts in relation to their antimutagenicity. Journal of agricultural and food chemistry, 43(1), 27-32. 4) Kähkönen, M. P., Hopia, A. I., Vuorela, H. J., Rauha, J.-P., Pihlaja, K., Kujala, T. S., & Heinonen, M. (1999). Antioxidant activity of plant extracts containing phenolic compounds. Journal of agricultural and food chemistry, 47(10), 3954-3962. 5) Kirk, J., & Allen, R. (1965). Dependence of chloroplast pigment synthesis on protein synthesis: effect of actidione. Biochemical and Biophysical Research Communications, 21(6), 523-530. Results Seaweed (Hypnea musciformis) Freshwater weed (Ipomoea aquatica) Extract Total Antioxidant (Prieto, Pineda, & Aguilar, 1999) (2) DPPH radical activity (Yen & Chen, 1995)(3) Phenolics (Kähkönen et al., 1999)(4) Carotenoids (Kirk & Allen, 1965)(5) S u n D r y i n g Extract B l e n d i n g Sun Dry Sample Protein Kjeldahl method Carbohydrate Phenol-sulphuric acid method Ash Muffle Furnace Moisture Oven Dryer Lipid Separating funnel Powder Materials and Methods The seaweed and water spinach used in this study were both collected from the Kolatoli beach area, Cox’s Bazar in 2019. Both the seaweed and freshwater weed samples were carefully sun-dried for 7-8 days and powdered using blender. Proximate compositions were determined using standard AOAC (2005) methods and antioxidant properties were determined by methods as given below. Conclusion The red seaweed Hypnea musciformis, collected from Kolatoli beach, Cox’s Bazar, Bangladesh, was considered low calories food with high level of carbohydrates, proteins, ashes and antioxidant activity in contrast to Ipomoea aquatica, a leafy vegetable representing freshwater weed, implying a promising role in food, feed, industrial applications as well as medicinal uses. Due to their investigated content, this seaweed offers a new potential source for protein, carbohydrate, nutrients and also, high level of bioactive compounds. So, the study suggests that seaweeds should be used more as a food for human consumption and also cultured commercially for its numerous other possibilities. This study also shows a protein-rich plant source that can be utilized to reduce the protein deficiency of certain areas of Bangladesh as well as other countries. Since macroalgae are common and largely available in the coastal areas of Bangladesh, their composition and antimicrobial properties made them potential candidates in contrast to freshwater weed for nutritional as well as medical applications. Proxim ate compo sitions Hypnea muscif ormis Ipomoe a aquatic a Brassi ca olerac ea Nymph aea noucha li Amaran thus gangeti cus Spina cia olerac ea Cucur bita maxim a Protein (%) 15.953 6.01 3.5 14.8 2.39 2.26 0.59 Carboh ydrate (%) 37.464 16.63 6.4 8.79 4.35 4.75 5.1 Fat (%) 0.282 0.24 0.4 2.8 0.19 0.21 0.08 Moistu re (%) 25.154 27.597 85 6.4 90.75 89.93 93.33 Ash (%) 22.56 12.65 8.97 18.7 1.42 2.12 0.67 Refere nces This study This study (Sheel a, Nath, 2004) (Banerj ee & Matai, 1990), (Islam, Khan, & Akhtaru zzaman, 2010) (Islam et al., 2010) (Islam et al., 2010) Table 2. Proximate composition of some vegetables in contrast to study samples. The authors would like to express their gratitude to SUST Research Center, Shahjalal University of Science & Technology, Sylhet, Bangladesh for research funding (Grant number PS/2019/1/25). Acknowledgment For more Info/Query: saadaldinsifat@gmail.com