Judul: Pemberian berbagai jenis madu dengan rasio pengenceran berbeda setelah masa penyimpanan terhadap kualitas sperma ikan patin siam (Pangasius hypopthalmus).
Abstrak: Good seed can be produced by a good broodstock, to produce a good broodstock would takes a long time and high cost. A problem that usually occurs in catfish hatchery industry was time ovulation of catish eggs for 9-15 hours after injection. So it takes time for the sperm waiting for 6 hours for the whole egg can be fertilized well. The purpose of this study was to determine the effect of various types of honey (longan honey, lychee honey, and cottonwoods honey) on sperm quality Siamese catfish (Pangasius hypopthalmus) with different dilution ratios after the storage period which includes scores motility, percentage motility, viability and morphology of sperm, fertilization rate, and hatching rate. The best treatment was obtained on the aplication of longan honey as a sperm diluent 1:50 dilution ratio. Size of sperm head reached 4,29±0,51μm and a long tail 27,22±1,54μm. Sperm motility scores obtained 5,00±0,00aA, sperm motility 87,67±0,58aC%, sperm viability 96,33±0,58aB%, the fertilization rate 97,10±0,70cC% and hatching rate 93,44±2,39cC%. In addition, the ratio of fresh sperm fertilization 1mL and the number of eggs reaches 1:125000.
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Judul: Rekayasa rematurasi ikan patin siam Pangasianodon hypophthalmus dengan penyuntikan hormon PMSG dan HCG serta penambahan vitamin mix 300 mg/kg pada pakan
Abstrak: The research was carried out from April to June, 2010 at Babakan Field LaboratoryPonds, Darmaga. The research aimed to increase the rematuration process rate on striped catfish Pangasianodon hypophthalmusthrough a combination of Pregnant Mare Serum Gonadotropin(PMSG)and Human Chorionic Gonadotropin (HCG) hormone injection with 5 and 2,5 IU; 10 and 5 IU;also 20 and 10 IU/kgof spawner body weight dosage combinedwith vitamin mixaddition to fish feed. Sixteen femalestriped catfish spawner were used, consisting of twelve PMSG-treatedspawner and 4 control spawner.This researchused one way single ANOVA with 4treatments and 3 replications. Statistic analysis of observed variables showed unsignificant differences among the three treatments in rematuration parameters. It was resulted that rematuration rate was increased in treatedspawners indicated by a 100% pregnancy. Spawners treated with 10 IU PMSG and 5 IU HCG/kg of spawner body weight along with 20 IU PMSG and 10 IU HCG/kg of spawner body weight dosage was able to reach maturity and spawned with the larval survival rate on the fourth day at 98,63% and 84,81% respectively, thus making 10 IU PMSG and 5 IU HCG/kg of spawner body weight as the best dosage.
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Judul: Metrik Einstein (Anti-) Self-Dual Berdimensi Empat dengan Metode Cartan
Abstrak: Gravitational field equation can be formulated in differential forms (differential geometry), which describes gravity as a manifestation of the curvature of space-time. Curvature of space-time is characterized by a metric that satisfies the gravitational field equation. With differential forms it can be formulated the (anti-) self-dual Einstein equation, which is a modification of the Cartan structure in (anti-) self-dual basis. Calculation of (anti-) self-dual metric with (anti-) self-dual Einstein equation is simpler than the calculation using Christoffel symbols.
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