Judul: Pemacuan Kematangan Gonad Ikan Lele Dumbo (Clarias sp.) Betina dengan Kombinasi Hormon PMSG dan Spirulina
Abstrak: The demand of catfish in the market has been growing annually. It is a significant errand for farmers to provide an amount of seed continually in an adequate number in order to support catfish production. Rematuration is one of the ways to enhance spawning frequency. The aim of the research was to develop a process for accelerate gonad maturity of female catfish using combination of Pregnant Mare Serum Gonadotropin (PMSG) mix hormone and the addition of Spirulina in feeds. PMSG dosage used were 0 IU, 5 IU, 10 IU and 20 IU , whereas Spirulina were 0%, 1.5% and 3%. The results showed that gonad maturity process of female catfish could be accelerated only in 4 weeks by administering the combination of PMSG mix hormone and Spirulina supplementation in the feeds. The treatment of PMSG mix 5 IU/kg weight seemed to be significantly effective to accelerate gonad maturity in female catfish.
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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: Kerusakan bantalan rel kereta api di wilaya inspeksi 2 jalan dan bangunan perusahaan jawatan kereta api (pjka),cirebon
Abstrak: Kereta api merupakan salah satu sarana angkutan yang murah, cepat dan aman serta dapat mengangkut barang dalam jumlah besar. Kelancaran operasi sarana angkutan tersebut banyak ditentukan oleh kondisi jalan rel, termasuk kondisi bantalannya. Dalam hal ini bantalan rel kereta api dapat dibuat dari kayu, logam, atau beton. Namun demikian kayu merupakan bahan yang paling banyak digunakan sebagai pembuat bantalan rel kereta api di berbagai negara. Kenyataan menunjukkan bahwa kayu yang digunakan sebagai bantalan rel kereta api sering mengalami berbagai macam kerusakan yang menyebabkan bantalan tidak berfungsi lagi atau menurun fungsinya. Di Indonesia, informasi mengenai jenis dan tingkat kerusakan bantalan kayu masih sangat kurang, pada- hal informasi tersebut sangat penting sebagai dasar pertimbangan dalam rangka pemeliharaan jalan kereta api, agar umur pakainya (service life) lebih lama.
Keyword: bantalan rel