Judul: Efektivitas Ekstrak Lidah Buaya Aloe vera dalam Pakan sebagai Imunostimulan untuk Mencegah Infeksi Aeromonas hydrophila pada Ikan Lele Dumbo Clarias Sp.
Abstrak: Aeromonas hydrophila infection is one of problem causes Motile Aeromonad Septicaemia (MAS). In this study, diets containing aloe extract (5 ppt, 10 ppt and 20 ppt) as immunostimulant was applied to prevent MAS disease in Clarias sp. Dosages of Aloe vera extract added in the commercial diets were 5, 10, and 20 ppt. Experimental fish were fed daily for 7 days prior to challenge tests. Clinical signs were observed everyday after the challenge tests, whereas the haematological tests were observed at 2, 4, 8 days post infections. The results showed that diets containing 5, 10 and 20 ppt of aloe extract reduced the mortality and clinical signs of wounds compared to those of control fish. However among the dosages were statistically not different. Fish haematology showed no spesific trends at different dosages which represented by values of lymphocyte, monocyte, thrombocyte, haemoglobine as well as the phagocytic index.
Keyword: 

Judul: Effectivity of Aloe vera Extract to Treat Aeromonas hydrophila Infection in Catfish (Clarias sp.)
Abstrak: Aeromonas hydrophila infection is one of problem causes Motile Aeromonas Septicemia (MAS). In this study, diets containing crude aloe vera extract as immunostimulant was applied to treat MAS disease in Clarias sp. Dosages of crude Aloe vera extract added in commercial diets were 10, 20, and 40 g/kg. Experimental fish were fed daily for 7 days after challenge tests, whereas the haemotological tests were observed at 3, 5, 8 days post infection. The results showed that diets containing 10, 20, and 40 g/kg of aloe extract reduced the mortality and clinical signs of wounds compared to those of control fish. Dosages 40 g/kg showed best effect and significantly different with another dosages. Fish haemotology showed no specific trends at different dosages which represented by values of eritrocyte, leucocyte, hematocryte, and haemoglobine.
Keyword: 

Judul: Transisi Fasa Materi Hadronik ke Materi Kuark pada Inti Bintang Neutron.
Abstrak: Bintang neutron terdiri dari beberapa lapisan yang disusun oleh materi nuklir yang berbeda dengan kerapatan yang semakin tinggi ketika mendekati pusat bintang. Inti luar bintang neutron disusun oleh materi hadronik (nukleon, lepton, dan hyperon), sedangkan inti dalam bintang neutron disusun oleh kuark-kuark bebas (up, down, strange) yang saling berinteraksi. Tujuan penelitian ini adalah mempelajari bagaimana transisi dari inti luar ke inti dalam bintang neutron dengan menggunakan pendekatan RMF (Relativistic Mean Field) untuk materi hadronik dan CIDDM (Confined Isospin Density Dependent Mass) untuk materi kuark. Tekanan transisi diperoleh ketika potensial kimia barion materi hadronik dan materi kuark bernilai sama. Nilai tekanan transisi dengan parameter SU6-TM1 sekitar 87 MeV/fm3 dan diperoleh massa maksimum bintang neutron yaitu 1.92M dengan jari-jari sekitar 8.62 km. Nilai tekanan transisi dengan parameter SU6-G2 sekitar 53 MeV/fm3 dan massa maksimum bintang neutron yaitu 1.88M dengan jari-jari sekitar 8.16 km. Jenis transisi fasa adalah orde satu ditandai dengan diskontinuitas dalam kerapatan energi (adanya mixed phase). Parameter-parameter pada model nuklir yang digunakan menyebabkan perbedaan kekakuan persamaan keadaan (EOS) dari materi hadronik dan materi kuark sehingga nilai tekanan transisi dari fasa hadronik ke fasa kuark juga berbeda.
Keyword: bintang neutron, persamaan keadaan, transisi fasa