Judul: Efektivitas penambahan zeolit dan karbon aktif pada pengangkutan benih ikan gurame dengan kepadatan tinggi
Abstrak: Giant gouramy is one of economically important fishes which generally cultured in West and Central Java, along with production (rearing) process mostly held in other areas of Java, Borneo, Sumatra, and Nusa Tenggara. Fry demands were supplied from culture areas by means of transportation. In this research, effectiveness of zeolite and activated carbon to maintain water quality of giant gouramy fry transportation were measured at 20 fish/ℓ, 30 fish/ℓ, 40 fish/ℓ, and 50 fish/ℓ density. This research indicated that the 40 fish/ℓ density gave the best result. It is shown by the survival rate (84,17%), daily growth rate (2,12%) and blood profile of fish approaching normal conditions. Based on these results, it was concluded that 40 fish/ℓ giant gouramy density is the best treatment for a three days transportation.
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Judul: Efektivitas Penambahan Zeolit 20 g/ℓ, Karbon Aktif 10 g/ℓ dan Garam 5 g/ℓ dalam Transportasi Tertutup Benih Ikan Gurame Osphronemus goramy Lac dengan Kepadatan Berbeda
Abstrak: Giant Gouramy is one of leading commodity Kementerian Kelautan dan Perikanan Republik Indonesia with production increase until 8,8% per year. Problem who often faced by Indonesian farmer in giant gouramy seed delivery is low survival rate due to the water quality change during transportation. One attempt was made to neutralize the ammonia is by adding zeolite and activated carbon in the transportation medium. Transportation carried out for 96 hour, then fish maintained for 14 days. This reaserch used giant gouramy seed size 3 cm with different density 45, 50, 75 and 100 giant gouramy seed/ℓ, zeolite added 20 g/ℓ, actived carbon 10 g/ℓ and salt 5 g/ℓ. The result showed treatment with density 75 carp seed/ℓ better than other treatment. It also showed by the value of the water quality that better than the other treatment. TAN 4,08±4,33 mg/ℓ, DO 4,4 mg/ℓ support the high survival rate 70,67%. Value of post transportation survival maintainance 100%, with growth rate 9,21% daily weight and income Rp 8.957.200.
Keyword: giant gouramy, zeolite, activated carbon, survival rate, Fish transportation

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