Judul: Pematangan Gonad Calon Induk Ikan Patin Siam Pangasianodon hypophthalmus di Luar Musim Pemijahan Menggunakan Hormon Pregnant Mare Serum Gonadotrophin (PMSG)
Abstrak: The Problems on catfish culture is a scarcity of seeds in the dry season due to the lack of availability of the broodstock catfish mature gonads. The purpose of this research was to induce gonad maturity catfish broodstock hormonally outside the spawning season with PMSG hormone. The tested fish were injected with treatment 0 IU / kg fish, 5 IU / kg of fish and 10 IU / kg fish. Pregnant Mare Serum Hormone Gonadotrophin (PMSG) is a hormone that can stimulate gonadal maturation in the catfish because it contains a lot of FSH and LH bit. PMSG hormone induced by injection intramuscularly given 2 weeks for 8 weeks. The results showed that the PMSG is able to accelerate the maturity of gonads catfish broodstock. The best dosage is 5 IU PMSG / kg fish / 2 weeks / 8 weeks. The results obtained percentage of mature fish gonads reaches 100% at week 8, whereas the treatment 0 IU / kg fish reach 30% the end of the study period. PMSG can be used to accelerate the maturity of gonads in brood fish catfish that seed production can be produced throughout the year.
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Judul: Induced Maturation of Female Striped Catfish Pangasianodon hypophthalmus Broodstock in Non-spawning Season using Hormone Combination of Pregnant Mare Serum Gonadotropin (PMSG) and Antidopamine
Abstrak: Budidaya ikan patin siam memiliki kendala pada ketersediaan benih yang sulit di musim kemarau disebabkan oleh minimnya induk ikan patin siam yang matang gonad. Penelitian ini bertujuan menginduksi dan mempersingkat waktu pematangan gonad di luar musim pemijahan dengan menggunakan kombinasi hormon PMSG dan antidopamin. Penelitian menggunakan metode rancangan acak lengkap, terdiri atas 4 perlakuan dengan masing-masing 10 kali ulangan diinduksi dengan hormon secara intramuskuler, interval penyuntikan setiap 2 minggu. Dosis yang diberikan adalah PMSG 0 IU/kg ikan + antidopamin 10 μg/kg ikan, PMSG 5 IU/kg ikan + antidopamin 10 μg/kg ikan, PMSG 10 IU/kg ikan + antidopamin 10 μg/kg ikan, dan kontrol menggunakan larutan fisiologis. Hasil terbaik ditunjukkan oleh perlakuan PMSG 10 IU/kg ikan + antidopamin 10 μg/kg ikan dengan menghasilkan persentase matang gonad mencapai 100% populasi dengan TKG IV dalam waktu 6 minggu (3 kali penyuntikan), sedangkan pada kontrol hanya 30% matang gonad dalam waktu 8 minggu. Kombinasi hormon PMSG dan antidopamin dapat menginduksi percepatan pematangan gonad calon induk ikan patin siam di luar musim pemijahan. Hal ini memberikan harapan produksi induk matang gonad dan benih ikan patin dapat dilakukan sepanjang tahun.
Keyword: Antidopamin, Striped catfish, Season, Maturation, PMSG, Gonadal maturation, Non-Spawing season, Randomized dosign, Spawning seasion, Cat fish

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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