Judul: Evaluasi Penambahan Alanyl-Glutamin pada Pakan terhadap Pertumbuhan Udang Vaname Litopenaeus vannamei
Abstrak: Alanyl-glutamin termasuk ke dalam glutamin dipeptida yang mengandung alanin dan glutamin. Penelitian ini bertujuan untuk mengevaluasi penambahan alanyl-glutamin pada pakan terhadap pertumbuhan dan komposisi proksimat udang vaname Litopenaeus vannamei. Penelitian ini menggunakan rancangan acak lengkap (RAL) dengan empat kali ulangan pada empat perlakuan yaitu penambahan alanyl-glutamin sebanyak 0%, 1%, 2%, dan 3% pada pakan komersial dengan kadar protein 42%. Benih udang dipelihara di dalam akuarium ukuran 60 cm x 30 cm x 30 cm dengan padat tebar 15 ekor/akuarium selama 50 hari. Udang diberi pakan sebanyak 15% dari bobot tubuh yang dibagi dalam empat kali pemberian (pukul 07.00, pukul 11.00, pukul 15.00, dan pukul 19.00 WIB). Hasil penelitian menunjukkan bahwa penambahan alanyl-glutamin pada pakan dapat meningkatkan kadar protein tubuh udang, namun tidak berpengaruh terhadap kinerja pertumbuhan udang vaname. Bobot akhir, laju pertumbuhan spesifik, jumlah konsumsi pakan, rasio konversi pakan, tingkat kelangsungan hidup, dan nilai rasio efisiensi protein yang dihasilkan tidak berbeda nyata antar perlakuan (P>0,05)., Alanyl-glutamine is a glutamine dipeptide containing alanine and glutamine. This study aimed to evaluate the addition of alanyl-glutamine in feed for the growth of white shrimp Litopenaeus vannamei. This study used a completely randomized design (CRD) with four replications in four treatments, namely the addition of alanyl-glutamine either 0%, 1%, 2%, and 3% of commercial feed containing 42% protein. Shrimp were kept in an aquarium with a size of 60 cm x 30 cm x 30 cm with a stocking density of 15 fish/aquarium for 50 days. Shrimp were fed of 15% of body weight divided into four feedings (at 07.00, 11.00, 15.00, and 19.00 WIB). The results showed that the addition of alanyl-glutamine in the feed would increase the protein content of the shrimp’s body, but did not affect the growth of the white shrimp. Final weight, specific growth rate, total feed consumption, feed conversion ratio, survival rate, and the resulting protein efficiency ratio did not significantly different among treatments (P>0.05).
Keyword: alanyl-glutamine, feed, growth, shrimp

Judul: Penambahan Feed Additive Berbasis Selenium Organik dalam Pakan terhadap Kinerja Pertumbuhan Udang Vaname Litopenaeus vannamei
Abstrak: Penelitian ini bertujuan mengukur kinerja pertumbuhan udang vaname (Litopenaeus vannamei) yang diberi suplementasi selenium organik. Terdapat tiga perlakuan berbeda, yaitu K (pakan tanpa feed additive), A (selenium organik dan zinc), dan B (selenium organik). Penelitian ini menggunakan rancangan acak lengkap dengan tiga perlakuan dan empat ulangan. Udang yang digunakan adalah udang vaname dengan ukuran rata-rata 1,5 g sebanyak 15 ekor/akuarium. Pemeliharaan udang uji dilakukan selama 56 hari pada akuarium berukuran 60 × 40 × 45 cm3 . Udang uji diberi pakan lima kali sehari, dengan metode pemberian pakan berdasarkan feeding rate yaitu 5-8% yang disesuaikan dengan biomassa udang setiap 14 hari. Hasil penelitian ini menunjukan nilai laju pertumbuhan harian, pertambahan bobot harian, rasio konversi pakan, dan rasio efisiensi protein lebih baik pada udang yang diberikan perlakuan dibandingkan kontrol. Udang vaname yang diberi pakan perlakuan A (selenium organik dan zinc) memperlihatkan kinerja pertumbuhan terbaik dibanding perlakuan lainnya., The experiment was conducted to measure the growth performance of white shrimp (Litopenaeus vannamei) given organic selenium supplementation. There were three different treatments, namely K (feed without feed additive), A (organic selenium and zinc), and B (organic selenium). This study used a completely randomized design with three treatments and four replications. The shrimp used were vaname shrimp with an average size of 1.5 g as many as 15 fish/aquarium. The rearing of the test shrimp was carried out for 56 days in an aquarium measuring 60 × 40 × 45 cm3. The test shrimp were fed five times a day, with a feeding method based on a feeding rate of 5-8% adjusted for shrimp biomass every 14 days. The results of this study showed that the daily growth rate, daily weight gain, feed conversion ratio, and protein efficiency ratio were better in the treated shrimp than the control. Vannamei shrimp fed with treatment A (organic selenium and zinc) showed the best growth performance compared to other treatments.
Keyword: growth, selenium, white shrimp, zinc

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