Judul: The Formulation of High Fiber Violet Bites Made From Purple Sweet Potato Extrudate and Black Soybean
Abstrak: Serat pangan memiliki berbagai manfaat bagi tubuh, seperti membantu dalam proses laksasi, metabolisme lemak, anti-kanker, dan anti-inflamasi. Sebanyak 95,4% masyarakat Indonesia kurang mengonsumsi serat. Ubi jalar ungu dan kedelai hitam merupakan bahan pangan yang tinggi serat dan memiliki potensi antioksidan tinggi. Penelitian ini bertujuan mendapatkan formula terbaik produk violet bites yang terbuat dari ekstrudat ubi jalar ungu dan kedelai hitam. Tahapan penelitian ini meliputi pembuatan formula, evaluasi sensori, analisis kandungan serat, analisis kandungan zat gizi makro, dan analisis kapasitas antioksidan. Penelitian ini menggunakan empat formula dengan perbedaan rasio ekstrudat ubi jalar ungu dan kedelai hitam, yaitu F1 (80:20), F2 (70:30), F3 (60:40), F4 (50:50). Formula terpilih berdasarkan hasil evaluasi sensori dan kandungan serat pangan adalah F2 dengan kandungan air 10,14%; abu 2,52%; protein 7,20%; lemak 8,89%; karbohidrat total 71,24%; serat pangan 13,50% basis basah. Kandungan serat formula terpilih lebih tinggi daripada snack bar komersial dan dapat diklaim sebagai produk tinggi serat. Dua takaran saji per hari dari formula terpilih dapat berkontribusi 10,4-15,2% terhadap kebutuhan energi dan 25,6-37,8% terhadap kebutuhan serat sehari untuk dewasa. Kapasitas antioksidan dari formula terpilih setara dengan 548,34 mg vitamin C per 100 gram., Dietary fiber had benefits for laxative process, fat metabolism, anti-cancer, and anti-inflamation. 95.4% Indonesian people consumed less fiber. Purple sweet potato and black soybean are high fiber foods and have a potency of high antioxidant capacity. This research aimed to develop the best formula of violet bites made from purple sweet potato extrudate and black soybean. This research steps include formula development, sensory evaluation, fiber analysis, macro nutrient analysis, and antioxidant capacity analysis. This research used four formulas with different ratios of purple sweet potato extrudate and black soybean, i.e F1 (80:20), F2 (70:30), F3 (60:40), F4 (50:50). The selected formula based on sensory evaluation and dietary fiber content was F2 which contains 10.14% water, 2.52% ash, 7.20% protein, 8.89% fat, 71.24% total carbohydrate, and 13.50% dietary fiber of wet basis. The dietary fiber content of the selected formula was higher than the commercial bar and might be claimed as a high fiber food. Two serving size of the selected formula can contribute 10.4-15.2% to daily energy need and 25.6-37.8% to daily dietary fiber need of adults. The antioxidant capacity of the selected formula was equivalent to 548.34 mg vitamin C per 100 gram.
Keyword: ekstrudat ubi jalar ungu, kapasitas antioksidan, kedelai hitam, serat

Judul: Formulasi Goguma Ppang Tinggi Serat Berbahan Ubi Cilembu (Ipomoea batatas L.) dan Kacang Merah (Phaseolus vulgaris)
Abstrak: Konsumsi serat masyarakat Indonesia perlu diperhatikan karena termasuk kategori kurang, yaitu sebesar 10,5 g. Ubi cilembu dan kacang merah merupakan salah satu bahan yang mengandung serat tinggi. Penelitian ini bertujuan mendapatkan formula terbaik produk Goguma Ppang berbahan dasar ubi cilembu dan kacang merah. Tahapan penelitian ini meliputi pembuatan formula, uji fisik, evaluasi sensori, uji kandungan zat gizi makro dan serat. Penelitian ini menggunakan empat formula dengan perbedaan rasio ubi cilembu dan kacang merah, yaitu F0 (100:0), F1 (90:10), F2 (80:20), dan F3 (70:30). Formula formula terbaik yang dipilih berdasarkan evaluasi sensori, uji fisik dan kandungan serat adalah F2 dengan kandungan air, abu, protein, lemak, karbohidrat dan serat masing-masing 41,84%, 1,27%, 3,14%, 9,82%, 43,96%, dan 7,21%. Kandungan serat formula terpilih lebih tinggi dibandingkan produk yang berada di pasaran dan dapat di klaim sebagai produk yang tinggi serat. Dua takaran saji per hari dari formula terpilih berkontribusi 4,70–6,93% terhadap kebutuhan energi dan 8,77–12,98% terhadap kebutuhan serat dalam sehari orang dewasa., Indonesian people need to focus on fiber consumption because it is included in the deficient category, namely 10.5 g. Cilembu sweet potatoes and red beans are ingredients that contain high fiber. This research aimed to obtain the best formula for Goguma Ppang products made from Cilembu sweet potatoes and red beans. The stages of this research include formula development, physical tests, sensory evaluation, macronutrient- and fiber- analysis. This research used four formulas with different ratios of Cilembu sweet potato and red beans, namely F0 (100:0), F1 (90:10), F2 (80:20), and F3 (70:30). The best formula selected based on sensory evaluation, physical tests and fiber content was F2 with content of moisture, crude mineral, protein, fat, carbohydrate and fiber i.e. 41.84, 1.27, 3.14, 9.82, 43.96 and 7.21 respectively. The fiber content of the selected formula is higher than commercial product and can be claimed as a high fiber product. Two servings per day of the selected formula contribute 4.70–6.93% to the energy needs and 8,77–12.98% to the daily fiber needs of adults.
Keyword: Cilembu sweet potato, fiber, goguma ppang, red bean

Judul: Penggunaan Teorema Homeomorphy 2-Manifold dan Teorema Euler Poincare pada Torus 𝑇�� dan Simplicial Complex 𝐾��
Abstrak: Two dimensional topological spaces are said to be homeomorphic if they have the same topological invariant, where one of topological invariant used is an Euler characteristic. Homeomorphy 2-Manifold’s Theorem and Euler Poincare’s Theorem are used to distinguish two topological spaces. Homeomorphy 2-Manifold’s Theorem uses Euler characteristic to identify two dimensional topological spaces. Euler Poincare’s Theorem is an alternative way to find Euler characteristic with Betti number, which is topological invariant as well. The objective of this paper is to investigate the homeomorphism of torus 𝑇����� and simplicial complex 𝐾�����. Topological space torus and simplicial complex 𝐾����� have the same Euler characteristic, which is two. Based on Homeomorphy 2-Manifold’s Theorem topological space torus 𝑇����� and simplicial complex 𝐾����� is homeomorphic.
Keyword: simplicial, torus, Euler, homeomorphism, topology