Judul: Induction of Gonad Maturation in Male Pearl Catfish (Clarias gariepinus) Using the Blood Plasma of Male Sheep
Abstrak: Pearl catfish (Clarias gariepinus) is one type of freshwater consumption fish with high economic value and is one of the main fishery commodities in Indonesia. One of the obstacles in catfish hatcheries is the availability of seeds thatdepend on spawning activities so that good broodstock quality is also needed. Thisstudy aims to test the induction of male catfish gonad maturation using ram blood plasma as a new alternative gonad maturation hormone. This study used complete randomized design consisting of three treatments with 15 individual replicates each.The method of hormone administration to be used is the intramuscular injection method. The results showed that the P1.0 treatment was the best treatment in increasing gonad maturation. The P1.0 treatment experienced the highest increase of 2.8 times (P < 0.05) when compared to the P0.0 treatment at the end of maintenance, while the P0.5 treatment experienced an increase of 1.6 times (P>0.05) when compared to the P0.0 treatment at the end of maintenance. The results showed that induction of gonadal maturation using ram blood plasma provedto be able to increase gonadal maturity in male catfish in 28 days of maintenance.
Keyword: Clarias gariepinus, gonads, sheep blood, spawning

Judul: Evaluation of the Effectivity of Patin Brain Extract to Induce Spawning of Sangkuriang Catfish, Clarias sp.
Abstrak: The availability of fish juvenile with high quality and quantity is a key factor in aquaculture. Important development in fish breeding has been developed. Patin, Pangasianodon hypopthalmus brain extract has been known to contain GnRH that could stimulate the pituitary gland to secrete gonadotropin hormone. The aim of this research is to evaluate the effectivity of Patin brain extract to induce Sangkuriang catfish, Clarias sp. Spawning. This research showed that the dose of Patin brain extract with 200 mg/kg of brood catfish was the lowest dose to give the best result of Sangkuriang catfish, Clarias sp. spawning with the degree of spawning of 66,66%, spawning latency time of 9,25 ± 1,06 hour, egg diameter of 1,51± 0,09 mm, spawning fecundity of 11,38 ± 0,87%, fertility rate of 90,63 ± 9,50 and hatching rate of 76,3 ± 6,14%. The degree of spawning had the highest value (P<0,05) which was 100% when female brood catfish was injected with synthetic hormon (ovaprim as much as 0,3 ml/kg) and the hypofisis extract of Pangasius compared to other treatments.
Keyword: 

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