The presented study has been carried out in order to study the quality of Alkali Treated Cottonii (ATC) made from Eucheuma cottonii which being collected from different regions in Indonesia (Belitung, Nusa Tenggara Barat and Lampung). The quality variables analyzed were the characteristics of raw materials (Clean anhydrous weed and impurities) and the characteristics of ATC produced (moisture content, ash content, acid insoluble ash content, yield, gel strength, sulphate content, gelling -melting point). The analysis was done in 3 replicates and the data were statistically analyzed using SPSS 15 package software. Results indicated that the raw material from Lampung had a better quality than those from Nusa Tenggara Barat and Belitung. In addition, the characteristics of ATC produced from these three raw materials showed that seaweed from Lampung produced better quality ATC than those from Nusa Tenggara Barat and Belitung in terms of their gel strength, sulphate content and yield. Keywords: alkali treated cottonii (ATC), Eucheuma cottonii, quality ABSTRAK Penelitian mengenai pembuatan Alkali Tretated Cottonii (ATC) dari rumput laut Eucheuma cottoniii dari beberapa wilayah di Indonesia (Belitung, Nusa Tenggara Barat, dan Lampung) telah dilaksanakan dalam rangka mengetahui kualitas ATC yang dibuat. Pengamatan dilakukan terhadap karakteristik bahan baku rumput laut (Clean anhydrous weed dan impurities) serta karakteristik ATC yang dihasilkan (kadar air, kadar abu, kadar abu tak larut asam, rendemen, kekuatan gel, kadar sulfat dan titik jendal dan titik leleh). Analisa dilakukan dengan 3 kali ulangan dan datanya dianalisa menggunakan paket program (software) SPSS 15. Hasil penelitian menunjukkan bahwa bahan baku yang berasal dari Lampung memiliki kualitas yang lebih baik dibandingkan dengan bahan baku yang berasal dari Nusa Tenggara Barat dan Belitung. Demikian pula dengan hasil karakterissasi ATC yang dihasilkan. ATC yang dihasilkan dari rumput laut yang berasal dari Lampung memiliki mutu paling baik terutama dari segi kekuatan gel, kadar sulfat, dan rendemen yang dihasilkan.
The processing of agricultural products is one of the pillars of the development of agro-industry in an area. In LabuhanKertasari Village, the main products from the agricultural sector are seaweed, hybrid maize, and coconut. However, farmers only sell agricultural products in the form of raw materials without processing them first. Processed products certainly have a higher economic value than raw materials. For this reason, this research was conducted to process seaweed and coconut into masks which were then tested for the antioxidant activity of the masks that were processed. The research conducted was a laboratory experimental study where seaweed and coconut were first processed into a powder. The treatment given is processing seaweed into powder with an alkaline process and without an alkaline process. Then, mixing seaweed powder and coconut powder with three ratios, namely seaweed powder: coconut powder (1: 1, 2: 1, 3: 1). The results showed that the antioxidant activity of the masks 1: 1, 2: 1, 3: 1 were 743,9 respectively; 513.69; and 406.23 (with alkaline seaweed powder) and 193.67; 174.09; and 149.10 (with seaweed powder without alkalization). The result showed that a mask with a ratio of 3: 1 without the alkalization process is the mask with the highest antioxidant activity value and suitable for the skin.
Carrageenan is a group of galactose polysaccharides extracted from seaweed and has the ability to form a thermo-reversible gel or a viscous solution when added to the salt solution widely utilized as gelling, thickener and stabilizers in various industries such as food, pharmaceuticals, cosmetics, printing, and textiles. Only two types of carrageenan can be used in the manufacture of hydrogels which are kappa and iota. Kappa-carrageenan is produced from the tropical seaweed Kappaphycus alvarezii and Eucheuma denticulatum is the main species producing iota-carrageenan. The aim of this research is to know the composition of kappa-carrageenan and iota-carrageenan mixture as gel base to produce the optimum physical properties and to know the physical properties of optimum formula with the addition of papain enzyme for 4 weeks storage. The determination of the optimum formula of mixed carrageenan kappa and iota gel with Simplex Lattice Design method. The physical properties of the optimum formula with the addition of papain enzyme during 4 weeks storage are viscosity, pH, dispersion, and sineresis of optimum formula were statistically verified using Anova Univariate method of experimental design of two factorial with 95% confidence level. The results showed that the optimal formula of mixed carrageenan kappa and iota respectively concentrations of 0.3%, 1% and the use of 0.8% papain enzyme.
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